Attachment #8455502 for bug #907396

Attachment #8455502: Rollup patch of all changes including bug 917313 for bug #907396

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      // Otherwise, we might end up with a frame when that lazy bit is
      // processed.  Figure out our actual style.
      break;
    }
  }

  // Now it might be that we have no frame because we're in a
  // display-box:none subtree, or it might be that we're just dealing with
  // lazy frame construction and it hasn't happened yet.  Check which
  // one it is.
  nsRefPtr<nsStyleContext> styleContext =
    nsComputedDOMStyle::GetStyleContextForElementNoFlush(aElement,
                                                         nullptr, nullptr);
  if (styleContext) {
    return styleContext->StyleDisplay()->mDisplayBox != NS_STYLE_DISPLAY_BOX_NONE;
  }
  return false;
}

bool 
nsEditor::IsEditable(nsIDOMNode *aNode)
{
  nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);





}

#ifdef DEBUG
  // To ensure that the functions below are only called within
  // |ApplyRenderingChangeToTree|.
static bool gInApplyRenderingChangeToTree = false;
#endif

static nsIFrame*
GetNearestAncestorFrame(nsIContent* aContent)
{
  nsIFrame* ancestorFrame = nullptr;
  for (nsIContent* ancestor = aContent->GetParent();
       ancestor && !ancestorFrame;
       ancestor = ancestor->GetParent()) {
    ancestorFrame = ancestor->GetPrimaryFrame();
  }
  return ancestorFrame;
}


static void
DoApplyRenderingChangeToTree(nsIFrame* aFrame,
                             nsChangeHint aChange);

/**
 * Sync views on aFrame and all of aFrame's descendants (following placeholders),
 * if aChange has nsChangeHint_SyncFrameView.
 * Calls DoApplyRenderingChangeToTree on all aFrame's out-of-flow descendants

    FrameConstructor()->RecreateFramesForContent(aElement, false);
  } else if (aPrimaryFrame) {
    nsStyleChangeList changeList;
    ComputeStyleChangeFor(aPrimaryFrame, &changeList, aMinHint,
                          aRestyleTracker, aRestyleHint);
    ProcessRestyledFrames(changeList);
  } else {
    // no frames, reconstruct for content
    nsStyleContext* newContext =
      FrameConstructor()->MaybeRecreateFramesForElement(aElement);
    if (newContext &&
        newContext->StyleDisplay()->mDisplayBox == NS_STYLE_DISPLAY_BOX_CONTENTS) {
      // Style change for a display-box:contents node that did not recreate frames.
      nsIFrame* frame = GetNearestAncestorFrame(aElement);
      MOZ_ASSERT(frame, "display-box:contents node in map although "
                        "it's a display:none descendant?");
      TreeMatchContext treeMatchContext(true,
                                        nsRuleWalker::eRelevantLinkUnvisited,
                                        frame->PresContext()->Document());
      nsIContent* parent = aElement->GetParent();
      Element* parentElement =
        parent && parent->IsElement() ? parent->AsElement() : nullptr;
      treeMatchContext.InitAncestors(parentElement);
      nsTArray<nsIContent*> visibleKidsOfHiddenElement;
      nsStyleChangeList changeList;
      ElementRestyler r(frame->PresContext(), aElement, &changeList,
                        aMinHint, aRestyleTracker, treeMatchContext,
                        visibleKidsOfHiddenElement);
      r.RestyleChildrenOfDisplayBoxContentsElement(frame, newContext,
                                                   aMinHint, aRestyleTracker,
                                                   aRestyleHint, this);
      ProcessRestyledFrames(changeList);
    }
  }
}

static inline dom::Element*
ElementForStyleContext(nsIContent* aParentContent,
                       nsIFrame* aFrame,
                       nsCSSPseudoElements::Type aPseudoType);


                    nsStyleContext* aContext, nsStyleContext* aParentContext)
{
  // get the contexts not provided
  if (!aContext) {
    aContext = aFrame->StyleContext();
  }

  if (!aParentContext) {
    nsIFrame* providerFrame;
    aParentContext = aFrame->GetParentStyleContext(&providerFrame);
    //    as the parent context instead of asking the frame

    // get the parent context from the frame (indirectly)
    nsIFrame* providerFrame = aFrame->GetParentStyleContextFrame();
    if (providerFrame)
      aParentContext = providerFrame->StyleContext();
    // aParentContext could still be null
  }

  NS_ASSERTION(aContext, "Failure to get required contexts");
  nsStyleContext* actualParentContext = aContext->GetParent();

  if (aParentContext) {
    if (aParentContext != actualParentContext) {

    } while ((outOfFlow = outOfFlow->GetNextContinuation()));
  }

  // DO NOT verify the style tree before reparenting.  The frame
  // tree has already been changed, so this check would just fail.
  nsStyleContext* oldContext = aFrame->StyleContext();

  nsRefPtr<nsStyleContext> newContext;
  nsIFrame* providerFrame;
  nsStyleContext* newParentContext = aFrame->GetParentStyleContext(&providerFrame);
  bool isChild = providerFrame && providerFrame->GetParent() == aFrame;
  nsStyleContext* newParentContext = nullptr;
  nsIFrame* providerChild = nullptr;
  if (isChild) {
    ReparentStyleContext(providerFrame);
    // Get the style context again after ReparentStyleContext() which might have
    // changed it.
    newParentContext = providerFrame->StyleContext();
    providerChild = providerFrame;
  } else if (providerFrame) {
    newParentContext = providerFrame->StyleContext();
  } else {
    NS_NOTREACHED("Reparenting something that has no usable parent? "
                  "Shouldn't happen!");
  }
  NS_ASSERTION(newParentContext, "Reparenting something that has no usable"
               " parent? Shouldn't happen!");
  // XXX need to do something here to produce the correct style context for
  // an IB split whose first inline part is inside a first-line frame.
  // Currently the first IB anonymous block's style context takes the first
  // part's style context as parent, which is wrong since first-line style
  // should not apply to the anonymous block.

#ifdef DEBUG
  {

  , mDesiredA11yNotifications(aParentRestyler.mDesiredA11yNotifications)
  , mKidsDesiredA11yNotifications(mDesiredA11yNotifications)
  , mOurA11yNotification(eDontNotify)
  , mVisibleKidsOfHiddenElement(aParentRestyler.mVisibleKidsOfHiddenElement)
#endif
{
}

ElementRestyler::ElementRestyler(nsPresContext* aPresContext,
                                 nsIContent* aContent,
                                 nsStyleChangeList* aChangeList,
                                 nsChangeHint aHintsHandledByAncestors,
                                 RestyleTracker& aRestyleTracker,
                                 TreeMatchContext& aTreeMatchContext,
                                 nsTArray<nsIContent*>&
                                 aVisibleKidsOfHiddenElement)
  : mPresContext(aPresContext)
  , mFrame(nullptr)
  , mParentContent(nullptr)
  , mContent(aContent)
  , mChangeList(aChangeList)
  , mHintsHandled(NS_SubtractHint(aHintsHandledByAncestors,
                  NS_HintsNotHandledForDescendantsIn(aHintsHandledByAncestors)))
  , mParentFrameHintsNotHandledForDescendants(nsChangeHint(0))
  , mHintsNotHandledForDescendants(nsChangeHint(0))
  , mRestyleTracker(aRestyleTracker)
  , mTreeMatchContext(aTreeMatchContext)
  , mResolvedChild(nullptr)
#ifdef ACCESSIBILITY
  , mDesiredA11yNotifications(eSendAllNotifications)
  , mKidsDesiredA11yNotifications(mDesiredA11yNotifications)
  , mOurA11yNotification(eDontNotify)
  , mVisibleKidsOfHiddenElement(aVisibleKidsOfHiddenElement)
#endif
{
}

void
ElementRestyler::CaptureChange(nsStyleContext* aOldContext,
                               nsStyleContext* aNewContext,
                               nsChangeHint aChangeToAssume)
{
  // Check some invariants about replacing one style context with another.
  NS_ASSERTION(aOldContext->GetPseudo() == aNewContext->GetPseudo(),
               "old and new style contexts should have the same pseudo");

               "frame must have content (unless at the top of the tree)");

  NS_ASSERTION(!GetPrevContinuationWithSameStyle(mFrame),
               "should not be trying to restyle this frame separately");

  MOZ_ASSERT(!(aRestyleHint & eRestyle_LaterSiblings),
             "eRestyle_LaterSiblings must not be part of aRestyleHint");

  AutoDisplayBoxContentsAncestorPusher adcp(mTreeMatchContext, mFrame->PresContext(),
      mFrame->GetContent() ? mFrame->GetContent()->GetParent() : nullptr);

  if (mContent && mContent->IsElement()) {
    mContent->OwnerDoc()->FlushPendingLinkUpdates();
    RestyleTracker::RestyleData restyleData;
    if (mRestyleTracker.GetRestyleData(mContent->AsElement(), &restyleData)) {
      if (NS_UpdateHint(mHintsHandled, restyleData.mChangeHint)) {
        mChangeList->AppendChange(mFrame, mContent, restyleData.mChangeHint);
      }
      aRestyleHint = nsRestyleHint(aRestyleHint | restyleData.mRestyleHint);

    // continuation or block-in-inline sibling.

    for (nsIFrame* f = mFrame; f;
         f = GetNextContinuationWithSameStyle(f, oldContext)) {
      RestyleSelf(f, aRestyleHint);
    }
  }

  // No need to do this if we're planning to reframe already.
  // It's also important to check mHintsHandled since we use
  // mFrame->StyleContext(), which is out of date if mHintsHandled
  // has a ReconstructFrame hint.  Using an out of date style
  // context could trigger assertions about mismatched rule trees.
  if (!(mHintsHandled & nsChangeHint_ReconstructFrame)) {
    RestyleChildren(childRestyleHint);
  }
}

void
ElementRestyler::RestyleSelf(nsIFrame* aSelf, nsRestyleHint aRestyleHint)
{
  MOZ_ASSERT(!(aRestyleHint & eRestyle_LaterSiblings),
             "eRestyle_LaterSiblings must not be part of aRestyleHint");


#ifdef ACCESSIBILITY
  mWasFrameVisible = nsIPresShell::IsAccessibilityActive() ?
    oldContext->StyleVisibility()->IsVisible() : false;
#endif

  nsIAtom* const pseudoTag = oldContext->GetPseudo();
  const nsCSSPseudoElements::Type pseudoType = oldContext->GetPseudoType();

  nsStyleContext* parentContext;
  // Get the frame providing the parent style context.  If it is a
  // child, then resolve the provider first.
  nsIFrame* providerFrame;
  nsStyleContext* parentContext = mFrame->GetParentStyleContext(&providerFrame);
  bool isChild = providerFrame && providerFrame->GetParent() == aSelf;
  if (isChild) {
    if (providerFrame)
      parentContext = providerFrame->StyleContext();
    else
      parentContext = nullptr;
  }
  else {
    MOZ_ASSERT(providerFrame->GetContent() == aSelf->GetContent(),
               "Postcondition for GetParentStyleContext() violated. "
               "That means we need to add the current element to the "
               "ancestor filter.");

    // resolve the provider here (before aSelf below).

    // assumeDifferenceHint forces the parent's change to be also
    // applied to this frame, no matter what
    // nsStyleContext::CalcStyleDifference says. CalcStyleDifference

      }
    }
  }
}

void
ElementRestyler::RestyleChildren(nsRestyleHint aChildRestyleHint)
{
  MOZ_ASSERT(!(mHintsHandled & nsChangeHint_ReconstructFrame),
             "No need to do this if we're planning to reframe already.");

  RestyleUndisplayedDescendants(aChildRestyleHint);

  // Check whether we might need to create a new ::before frame.
  // There's no need to do this if we're planning to reframe already
  // or if we're not forcing restyles on kids.
  // It's also important to check mHintsHandled since we use
  // mFrame->StyleContext(), which is out of date if mHintsHandled has a
  // ReconstructFrame hint.  Using an out of date style context could
  // trigger assertions about mismatched rule trees.

  // descendants anyway, so we want to avoid wasting time processing
  // style contexts that we're just going to throw away anyway. - dwh
  // It's also important to check mHintsHandled since reresolving the
  // kids would use mFrame->StyleContext(), which is out of date if
  // mHintsHandled has a ReconstructFrame hint; doing this could trigger
  // assertions about mismatched rule trees.
  nsIFrame *lastContinuation;
  if (!(mHintsHandled & nsChangeHint_ReconstructFrame)) {
    InitializeAccessibilityNotifications(mFrame->StyleContext());

    for (nsIFrame* f = mFrame; f;
         f = GetNextContinuationWithSameStyle(f, f->StyleContext())) {
      lastContinuation = f;
      RestyleContentChildren(f, aChildRestyleHint);
    }

    SendAccessibilityNotifications();

  // See comments above regarding :before.
  if (!(mHintsHandled & nsChangeHint_ReconstructFrame) &&
      aChildRestyleHint) {
    RestyleAfterPseudo(lastContinuation);
  }
}

void
ElementRestyler::RestyleChildrenOfDisplayBoxContentsElement(
  nsIFrame*       aParentFrame,
  nsStyleContext* aNewContext,
  nsChangeHint    aMinHint,
  RestyleTracker& aRestyleTracker,
  nsRestyleHint   aRestyleHint,
  RestyleManager* aRestyleManager)
{
  InitializeAccessibilityNotifications(aNewContext);
  DoRestyleUndisplayedDescendants(nsRestyleHint(0), mContent, aNewContext);
  if (!(mHintsHandled & nsChangeHint_ReconstructFrame)) {
    RestyleBeforePseudo(aParentFrame, nullptr, mContent, aNewContext);
  }
  if (!(mHintsHandled & nsChangeHint_ReconstructFrame)) {
    RestyleAfterPseudo(aParentFrame, nullptr, mContent, aNewContext);
  }
  if (!(mHintsHandled & nsChangeHint_ReconstructFrame)) {
    // Then process child frames for content that is a descendant of mContent.
    // XXX perhaps it's better to walk child frames (before reresolving
    // XXX undisplayed contexts above) and mark those that has a stylecontext
    // XXX leading up to mContent's old context? (instead of the
    // XXX ContentIsDescendantOf check below)
    nsIFrame::ChildListIterator lists(aParentFrame);
    for ( ; !lists.IsDone(); lists.Next()) {
      nsFrameList::Enumerator childFrames(lists.CurrentList());
      for (; !childFrames.AtEnd(); childFrames.Next()) {
        nsIFrame* f = childFrames.get();
        nsIContent* c = f->GetContent();
        if (nsContentUtils::ContentIsDescendantOf(c, mContent) &&
            !f->GetPrevContinuation()) {
          if (!(f->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
            aRestyleManager->ComputeStyleChangeFor(f, mChangeList, aMinHint,
                                                   aRestyleTracker,
                                                   aRestyleHint);
          }
        }
      }
    }
  }
  if (!(mHintsHandled & nsChangeHint_ReconstructFrame)) {
    SendAccessibilityNotifications();
  }
}

void
ElementRestyler::RestyleUndisplayedDescendants(nsRestyleHint aChildRestyleHint)
{
  // When the root element is display:none, we still construct *some*
  // frames that have the root element as their mContent, down to the
  // DocElementContainingBlock.
  bool checkUndisplayed;
  nsIContent* undisplayedParent;
  nsCSSFrameConstructor* frameConstructor = mPresContext->FrameConstructor();
  if (mFrame->StyleContext()->GetPseudo()) {
    checkUndisplayed = mFrame == mPresContext->FrameConstructor()->
                                   GetDocElementContainingBlock();
    undisplayedParent = nullptr;
  } else {
    checkUndisplayed = !!mFrame->GetContent();
    undisplayedParent = mFrame->GetContent();
  }
  if (checkUndisplayed) {
    DoRestyleUndisplayedDescendants(aChildRestyleHint, undisplayedParent,
                                    mFrame->StyleContext());
  }
}

void
ElementRestyler::DoRestyleUndisplayedDescendants(nsRestyleHint aChildRestyleHint,
                                                 nsIContent* aParent,
                                                 nsStyleContext* aParentContext)
{
  nsCSSFrameConstructor* fc = mPresContext->FrameConstructor();
  UndisplayedNode* nodes = fc->GetAllUndisplayedContentIn(aParent);
  RestyleUndisplayedNodes(aChildRestyleHint, nodes, aParent,
                          aParentContext, NS_STYLE_DISPLAY_BOX_NONE);
  nodes = fc->GetAllDisplayBoxContentsIn(aParent);
  RestyleUndisplayedNodes(aChildRestyleHint, nodes, aParent,
                          aParentContext, NS_STYLE_DISPLAY_BOX_CONTENTS);
}

void
ElementRestyler::RestyleUndisplayedNodes(nsRestyleHint    aChildRestyleHint,
                                         UndisplayedNode* aUndisplayed,
                                         nsIContent*      aUndisplayedParent,
                                         nsStyleContext*  aParentContext,
                                         const uint8_t    aDisplayBoxStyle)
{
  nsIContent* undisplayedParent = aUndisplayedParent;
  UndisplayedNode* undisplayed = aUndisplayed;
  TreeMatchContext::AutoAncestorPusher pusher(mTreeMatchContext);
  if (undisplayed) {
    pusher.PushAncestorAndStyleScope(undisplayedParent);
  }
  for (; undisplayed; undisplayed = undisplayed->mNext) {
    NS_ASSERTION(undisplayedParent ||
                 undisplayed->mContent ==
                   mPresContext->Document()->GetRootElement(),
                 "undisplayed node child of null must be root");
    NS_ASSERTION(!undisplayed->mStyle->GetPseudo(),
                 "Shouldn't have random pseudo style contexts in the "
                 "undisplayed map");

    // Get the parent of the undisplayed content and check if it is a XBL
    // children element. Push the children element as an ancestor here because it does
    // not have a frame and would not otherwise be pushed as an ancestor.
    nsIContent* parent = undisplayed->mContent->GetParent();
    TreeMatchContext::AutoAncestorPusher insertionPointPusher(mTreeMatchContext);
    if (parent && parent->IsActiveChildrenElement()) {
      insertionPointPusher.PushAncestorAndStyleScope(parent);
    }
    for (; undisplayed; undisplayed = undisplayed->mNext) {
      NS_ASSERTION(undisplayedParent ||
                   undisplayed->mContent ==
                     mPresContext->Document()->GetRootElement(),
                   "undisplayed node child of null must be root");
      NS_ASSERTION(!undisplayed->mStyle->GetPseudo(),
                   "Shouldn't have random pseudo style contexts in the "
                   "undisplayed map");

    nsRestyleHint thisChildHint = aChildRestyleHint;
    RestyleTracker::RestyleData undisplayedRestyleData;
    if (mRestyleTracker.GetRestyleData(undisplayed->mContent->AsElement(),
                                       &undisplayedRestyleData)) {
      thisChildHint =
        nsRestyleHint(thisChildHint | undisplayedRestyleData.mRestyleHint);
    }
    nsRefPtr<nsStyleContext> undisplayedContext;
    nsStyleSet* styleSet = mPresContext->StyleSet();
    if (thisChildHint) {
      undisplayedContext =
        styleSet->ResolveStyleFor(undisplayed->mContent->AsElement(),
                                  aParentContext,
                                  mTreeMatchContext);
    } else {
      undisplayedContext =
        styleSet->ReparentStyleContext(undisplayed->mStyle,
                                       aParentContext,
                                       undisplayed->mContent->AsElement());
    }
    const nsStyleDisplay* display = undisplayedContext->StyleDisplay();
    if (display->mDisplayBox != aDisplayBoxStyle) {
      NS_ASSERTION(undisplayed->mContent, "Must have undisplayed content");
      mChangeList->AppendChange(nullptr, undisplayed->mContent,
                                NS_STYLE_HINT_FRAMECHANGE);
      // The node should be removed from the undisplayed map when
      // we reframe it.
    } else {
      // update the undisplayed node with the new context
      undisplayed->mStyle = undisplayedContext;

      if (aDisplayBoxStyle == NS_STYLE_DISPLAY_BOX_CONTENTS) {
        DoRestyleUndisplayedDescendants(aChildRestyleHint, undisplayed->mContent,
                                        undisplayed->mStyle);
                                         &undisplayedRestyleData)) {
        thisChildHint =
          nsRestyleHint(thisChildHint | undisplayedRestyleData.mRestyleHint);
      }
      nsRefPtr<nsStyleContext> undisplayedContext;
      nsStyleSet* styleSet = mPresContext->StyleSet();
      if (thisChildHint) {
        undisplayedContext =
          styleSet->ResolveStyleFor(undisplayed->mContent->AsElement(),
                                    mFrame->StyleContext(),
                                    mTreeMatchContext);
      } else {
        undisplayedContext =
          styleSet->ReparentStyleContext(undisplayed->mStyle,
                                         mFrame->StyleContext(),
                                         undisplayed->mContent->AsElement());
      }
      const nsStyleDisplay* display = undisplayedContext->StyleDisplay();
      if (display->mDisplay != NS_STYLE_DISPLAY_NONE) {
        NS_ASSERTION(undisplayed->mContent,
                     "Must have undisplayed content");
        mChangeList->AppendChange(nullptr, undisplayed->mContent,
                                  NS_STYLE_HINT_FRAMECHANGE);
        // The node should be removed from the undisplayed map when
        // we reframe it.
      } else {
        // update the undisplayed node with the new context
        undisplayed->mStyle = undisplayedContext;
      }
    }
  }
}

void
ElementRestyler::RestyleBeforePseudo()
{
  RestyleBeforePseudo(mFrame, mFrame, mFrame->GetContent(),
                      mFrame->StyleContext());
}

void
ElementRestyler::RestyleBeforePseudo(nsIFrame* aGenConParentFrame,
                                     nsIFrame* aFrame,
                                     nsIContent* aContent,
                                     nsStyleContext* aStyleContext)
{
  // Make sure not to do this for pseudo-frames or frames that
  // can't have generated content.
  nsContainerFrame* cif;
  if (!aStyleContext->GetPseudo() &&
      ((aGenConParentFrame->GetStateBits() & NS_FRAME_MAY_HAVE_GENERATED_CONTENT) ||
       // Our content insertion frame might have gotten flagged.
       ((cif = aGenConParentFrame->GetContentInsertionFrame()) &&
        (cif->GetStateBits() & NS_FRAME_MAY_HAVE_GENERATED_CONTENT)))) {
    // Check for a ::before pseudo style and the absence of a ::before content,
    // but only if aFrame is null or is the first continuation.
    if (!aFrame || !aFrame->GetPrevContinuation()) {
      if (!nsLayoutUtils::GetBeforeFrameForContent(aGenConParentFrame, aContent) &&
          nsLayoutUtils::HasPseudoStyle(aContent, aStyleContext,
      // :before style context.
      if (!nsLayoutUtils::GetBeforeFrame(mFrame) &&
          nsLayoutUtils::HasPseudoStyle(mFrame->GetContent(),
                                        mFrame->StyleContext(),
                                        nsCSSPseudoElements::ePseudo_before,
                                        mPresContext)) {
        // Have to create the new ::before frame.
        NS_UpdateHint(mHintsHandled, nsChangeHint_ReconstructFrame);
        mChangeList->AppendChange(aFrame, aContent,
                                  nsChangeHint_ReconstructFrame);
      }
    }
  }
}

/**
 * aFrame is the last continuation or block-in-inline sibling that this
 * ElementRestyler is restyling.
 */
void
ElementRestyler::RestyleAfterPseudo(nsIFrame* aFrame)
{
  MOZ_ASSERT(aFrame);
  RestyleAfterPseudo(aFrame, aFrame, aFrame->GetContent(),
                     aFrame->StyleContext());
}

void
ElementRestyler::RestyleAfterPseudo(nsIFrame* aGenConParentFrame,
                                    nsIFrame* aFrame,
                                    nsIContent* aContent,
                                    nsStyleContext* aStyleContext)
{
  // Make sure not to do this for pseudo-frames or frames that
  // can't have generated content.
  nsContainerFrame* cif;
  if (!aStyleContext->GetPseudo() &&
      ((aGenConParentFrame->GetStateBits() & NS_FRAME_MAY_HAVE_GENERATED_CONTENT) ||
       // Our content insertion frame might have gotten flagged.
       ((cif = aGenConParentFrame->GetContentInsertionFrame()) &&
        (cif->GetStateBits() & NS_FRAME_MAY_HAVE_GENERATED_CONTENT)))) {
    // Check for an ::after pseudo style and the absence of an ::after content,
    // but only if aFrame is null or is the last continuation.
    if (!aFrame || !aFrame->GetNextContinuation()) {
      if (!nsLayoutUtils::GetAfterFrameForContent(aGenConParentFrame, aContent) &&
          nsLayoutUtils::HasPseudoStyle(aContent, aStyleContext,
      // Getting the :after frame is more expensive than getting the pseudo
      // context, so get the pseudo context first.
      if (nsLayoutUtils::HasPseudoStyle(aFrame->GetContent(),
                                        aFrame->StyleContext(),
                                        nsCSSPseudoElements::ePseudo_after,
                                        mPresContext)) {
        // Have to create the new ::after frame.
        // have to create the new :after frame
        NS_UpdateHint(mHintsHandled, nsChangeHint_ReconstructFrame);
        mChangeList->AppendChange(aFrame, mContent,
                                  nsChangeHint_ReconstructFrame);
      }
    }
  }
}

void
ElementRestyler::InitializeAccessibilityNotifications(nsStyleContext* aNewContext)
{
#ifdef ACCESSIBILITY
  // Notify a11y for primary frame only if it's a root frame of visibility
  // changes or its parent frame was hidden while it stays visible and
  // it is not inside a {ib} split or is the first frame of {ib} split.
  if (nsIPresShell::IsAccessibilityActive() &&
      (!mFrame ||
       (!mFrame->GetPrevContinuation() &&
        !mFrame->FrameIsNonFirstInIBSplit()))) {
    if (mDesiredA11yNotifications == eSendAllNotifications) {
      bool isFrameVisible = aNewContext->StyleVisibility()->IsVisible();
      if (isFrameVisible != mWasFrameVisible) {
        if (isFrameVisible) {
          // Notify a11y the element (perhaps with its children) was shown.
          // We don't fall into this case if this element gets or stays shown
          // while its parent becomes hidden.
          mKidsDesiredA11yNotifications = eSkipNotifications;
          mOurA11yNotification = eNotifyShown;
        } else {

          // visible children then we should notify a11y about that as if
          // they were inserted into tree. Notify a11y this element was
          // hidden.
          mKidsDesiredA11yNotifications = eNotifyIfShown;
          mOurA11yNotification = eNotifyHidden;
        }
      }
    } else if (mDesiredA11yNotifications == eNotifyIfShown &&
               aNewContext->StyleVisibility()->IsVisible()) {
      // Notify a11y that element stayed visible while its parent was hidden.
      nsIContent* c = mFrame ? mFrame->GetContent() : mContent;
      mVisibleKidsOfHiddenElement.AppendElement(c);
      mKidsDesiredA11yNotifications = eSkipNotifications;
    }
  }
#endif
}

void
ElementRestyler::RestyleContentChildren(nsIFrame* aParent,

        if (nsGkAtoms::placeholderFrame == child->GetType()) { // placeholder
          // get out of flow frame and recur there
          nsIFrame* outOfFlowFrame =
            nsPlaceholderFrame::GetRealFrameForPlaceholder(child);
          NS_ASSERTION(outOfFlowFrame, "no out-of-flow frame");
          NS_ASSERTION(outOfFlowFrame != mResolvedChild,
                       "out-of-flow frame not a true descendant");

          // |nsFrame::GetParentStyleContext| checks being out
          // of flow so that this works correctly.
          do {
            if (GetPrevContinuationWithSameStyle(outOfFlowFrame)) {
              // Later continuations are likely restyled as a result of
              // the restyling of the previous continuation.
              // (Currently that's always true, but it's likely to
              // change if we implement overflow:fragments or similar.)
              continue;

void
ElementRestyler::SendAccessibilityNotifications()
{
#ifdef ACCESSIBILITY
  // Send notifications about visibility changes.
  if (mOurA11yNotification == eNotifyShown) {
    nsAccessibilityService* accService = nsIPresShell::AccService();
    if (accService) {
      nsIPresShell* presShell = mPresContext->GetPresShell();
      nsIContent* content = mFrame ? mFrame->GetContent() : mContent;

      accService->ContentRangeInserted(presShell, content->GetParent(),
                                       content,
                                       content->GetNextSibling());
    }
  } else if (mOurA11yNotification == eNotifyHidden) {
    nsAccessibilityService* accService = nsIPresShell::AccService();
    if (accService) {
      nsIPresShell* presShell = mPresContext->GetPresShell();
      nsIContent* content = mFrame ? mFrame->GetContent() : mContent;
      accService->ContentRemoved(presShell, content->GetParent(), content);

      // Process children staying shown.
      uint32_t visibleContentCount = mVisibleKidsOfHiddenElement.Length();
      for (uint32_t idx = 0; idx < visibleContentCount; idx++) {
        nsIContent* childContent = mVisibleKidsOfHiddenElement[idx];
        accService->ContentRangeInserted(presShell, childContent->GetParent(),
                                         childContent,

        NS_ASSERTION(!cont->GetPrevContinuation(),
                     "continuing frame had more severe impact than first-in-flow");
        return;
      }
    }
  }
}

AutoDisplayBoxContentsAncestorPusher::AutoDisplayBoxContentsAncestorPusher(
  TreeMatchContext& aTreeMatchContext, nsPresContext* aPresContext,
  nsIContent* aParent)
  : mTreeMatchContext(aTreeMatchContext)
  , mPresContext(aPresContext)
{
  if (aParent && mTreeMatchContext.mAncestorFilter.HasFilter()) {
    nsFrameManager* fm = mPresContext->FrameManager();
    // Push display-box:contents mAncestors onto mTreeMatchContext.
    for (nsIContent* p = aParent; p && fm->GetDisplayBoxContentsStyleFor(p);
         p = p->GetParent()) {
      mAncestors.AppendElement(p->AsElement());
    }
    nsTArray<mozilla::dom::Element*>::size_type i = mAncestors.Length();
    while (i--) {
      mTreeMatchContext.mAncestorFilter.PushAncestor(mAncestors[i]);
      mTreeMatchContext.PushStyleScope(mAncestors[i]);
    }
  }

}

AutoDisplayBoxContentsAncestorPusher::~AutoDisplayBoxContentsAncestorPusher()
{
  // Pop the ancestors we pushed in the CTOR, if any.
  nsTArray<mozilla::dom::Element*>::size_type i = mAncestors.Length();
  while (i--) {
    mTreeMatchContext.mAncestorFilter.PopAncestor();
    mTreeMatchContext.PopStyleScope(mAncestors[i]);
  }
}

} // namespace mozilla






class nsIFrame;
class nsRefreshDriver;
class nsStyleChangeList;
struct TreeMatchContext;

namespace mozilla {
  class EventStates;
  struct UndisplayedNode;

namespace dom {
  class Element;
} // namespace dom

class RestyleManager MOZ_FINAL
{
public:
  friend class ::nsRefreshDriver;
  friend class RestyleTracker;

  typedef mozilla::dom::Element Element;

  RestyleManager(nsPresContext* aPresContext);


  RestyleTracker mPendingRestyles;
  RestyleTracker mPendingAnimationRestyles;
};

/**
 * An ElementRestyler is created for *each* element in a subtree that we
 * recompute styles for.
 */
class ElementRestyler MOZ_FINAL
{
public:
  typedef mozilla::dom::Element Element;

  // Construct for the root of the subtree that we're restyling.
  ElementRestyler(nsPresContext* aPresContext,
                  nsIFrame* aFrame,
                  nsStyleChangeList* aChangeList,
                  nsChangeHint aHintsHandledByAncestors,

  // as the parent style context for their outer table frame (table
  // wrapper frame).  We should probably try to get rid of this
  // exception and have the inheritance go the other way.)
  enum ParentContextFromChildFrame { PARENT_CONTEXT_FROM_CHILD_FRAME };
  ElementRestyler(ParentContextFromChildFrame,
                  const ElementRestyler& aParentFrameRestyler,
                  nsIFrame* aFrame);

  // For restyling undisplayed content only (mFrame==null).
  ElementRestyler(nsPresContext* aPresContext,
                  nsIContent* aContent,
                  nsStyleChangeList* aChangeList,
                  nsChangeHint aHintsHandledByAncestors,
                  RestyleTracker& aRestyleTracker,
                  TreeMatchContext& aTreeMatchContext,
                  nsTArray<nsIContent*>& aVisibleKidsOfHiddenElement);

  /**
   * Restyle our frame's element and its subtree.
   *
   * Use eRestyle_Self for the aRestyleHint argument to mean
   * "reresolve our style context but not kids", use eRestyle_Subtree
   * to mean "reresolve our style context and kids", and use
   * nsRestyleHint(0) to mean recompute a new style context for our
   * current parent and existing rulenode, and the same for kids.

   * mHintsHandled changes over time; it starts off as the hints that
   * have been handled by ancestors, and by the end of Restyle it
   * represents the hints that have been handled for this frame.  This
   * method is intended to be called after Restyle, to find out what
   * hints have been handled for this frame.
   */
  nsChangeHint HintsHandledForFrame() { return mHintsHandled; }

  /**
   * Called from RestyleManager::RestyleElement to restyle children of
   * a display-box:contents element.
   */
  void RestyleChildrenOfDisplayBoxContentsElement(nsIFrame* aParentFrame,
                                                  nsStyleContext* aNewContext,
                                                  nsChangeHint    aMinHint,
                                                  RestyleTracker& aRestyleTracker,
                                                  nsRestyleHint   aRestyleHint,
                                                  RestyleManager* aRestyleManager);
private:
  /**
   * First half of Restyle().
   */
  void RestyleSelf(nsIFrame* aSelf, nsRestyleHint aRestyleHint);

  /**
   * Restyle the children of this frame (and, in turn, their children).

   */
  void CaptureChange(nsStyleContext* aOldContext,
                     nsStyleContext* aNewContext,
                     nsChangeHint aChangeToAssume);

  /**
   * Helpers for RestyleChildren().
   */
  void RestyleUndisplayedDescendants(nsRestyleHint aChildRestyleHint);
  void DoRestyleUndisplayedDescendants(nsRestyleHint aChildRestyleHint,
                                       nsIContent* aParent,
                                       nsStyleContext* aParentStyleContext);
  void RestyleUndisplayedNodes(nsRestyleHint    aChildRestyleHint,
                               UndisplayedNode* aUndisplayed,
                               nsIContent*      aUndisplayedParent,
                               nsStyleContext*  aParentStyleContext,
                               const uint8_t    aDisplayBoxStyle);
  void RestyleBeforePseudo();
  void RestyleBeforePseudo(nsIFrame* aGenConParentFrame,
                           nsIFrame* aFrame,
                           nsIContent* aContent,
                           nsStyleContext* aStyleContext);
  void RestyleAfterPseudo(nsIFrame* aFrame);
  void RestyleAfterPseudo(nsIFrame* aGenConParentFrame,
                          nsIFrame* aFrame,
                          nsIContent* aContent,
                          nsStyleContext* aStyleContext);
  void RestyleContentChildren(nsIFrame* aParent,
                              nsRestyleHint aChildRestyleHint);
  void InitializeAccessibilityNotifications(nsStyleContext* aNewContext);
  void SendAccessibilityNotifications();

  enum DesiredA11yNotifications {
    eSkipNotifications,
    eSendAllNotifications,
    eNotifyIfShown
  };


  const DesiredA11yNotifications mDesiredA11yNotifications;
  DesiredA11yNotifications mKidsDesiredA11yNotifications;
  A11yNotificationType mOurA11yNotification;
  nsTArray<nsIContent*>& mVisibleKidsOfHiddenElement;
  bool mWasFrameVisible;
#endif
};

/**
 * This pushes any display-box:contents nodes onto a TreeMatchContext.
 * Use it before resolving style for kids of aParent where aParent
 * (and further ancestors) may be display:contents nodes which have
 * not yet been pushed onto TreeMatchContext.
 */
class MOZ_STACK_CLASS AutoDisplayBoxContentsAncestorPusher MOZ_FINAL
{
 public:
  typedef mozilla::dom::Element Element;
  AutoDisplayBoxContentsAncestorPusher(TreeMatchContext& aTreeMatchContext,
                                       nsPresContext*    aPresContext,
                                       nsIContent*       aParent);
  ~AutoDisplayBoxContentsAncestorPusher();
  bool IsEmpty() const { return mAncestors.Length() == 0; }
private:
  TreeMatchContext& mTreeMatchContext;
  nsPresContext* const mPresContext;
  nsAutoTArray<mozilla::dom::Element*, 4> mAncestors;
};

} // namespace mozilla

#endif /* mozilla_RestyleManager_h */





 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/**
 * A class which manages pending restyles.  This handles keeping track
 * of what nodes restyles need to happen on and so forth.
 */

#include "RestyleTracker.h"

#include "nsFrameManager.h"
#include "nsStyleChangeList.h"
#include "RestyleManager.h"
#include "GeckoProfiler.h"

namespace mozilla {

inline nsIDocument*
RestyleTracker::Document() const {

  if (element->GetCrossShadowCurrentDoc() != collector->tracker->Document() ||
      !element->HasFlag(collector->tracker->RestyleBit())) {
    return PL_DHASH_NEXT;
  }

  NS_ASSERTION(!element->HasFlag(collector->tracker->RootBit()) ||
               // Maybe we're just not reachable via the frame tree?
               (element->GetFlattenedTreeParent() &&
                (!element->GetFlattenedTreeParent()->GetPrimaryFrame() ||
                 element->GetFlattenedTreeParent()->GetPrimaryFrame()->IsLeaf() ||
                 element->GetCurrentDoc()->GetShell()->FrameManager()
                   ->GetDisplayBoxContentsStyleFor(element))) ||
               // Or not reachable due to an async reinsert we have
               // pending?  If so, we'll have a reframe hint around.
               // That incidentally makes it safe that we still have
               // the bit, since any descendants that didn't get added
               // to the roots list because we had the bits will be
               // completely restyled in a moment.
               (aData.mChangeHint & nsChangeHint_ReconstructFrame),
               "Why did this not get handled while processing mRestyleRoots?");





inline void
SetInitialSingleChild(nsContainerFrame* aParent, nsIFrame* aFrame)
{
  NS_PRECONDITION(!aFrame->GetNextSibling(), "Should be using a frame list");
  nsFrameList temp(aFrame, aFrame);
  aParent->SetInitialChildList(kPrincipalList, temp);
}

static nsContainerFrame*
GetContentInsertionFrameFor(nsIContent* aContent)
{
  // Get the primary frame associated with the content
  nsIFrame* frame = aContent->GetPrimaryFrame();

  if (!frame)
    return nullptr;

  // If the content of the frame is not the desired content then this is not
  // really a frame for the desired content.
  // XXX This check is needed due to bug 135040. Remove it once that's fixed.
  if (frame->GetContent() != aContent) {
    return nullptr;
  }

  nsContainerFrame* insertionFrame = frame->GetContentInsertionFrame();

  NS_ASSERTION(!insertionFrame || insertionFrame == frame || !frame->IsLeaf(),
    "The insertion frame is the primary frame or the primary frame isn't a leaf");

  return insertionFrame;
}

// -----------------------------------------------------------

// Structure used when constructing formatting object trees.
struct nsFrameItems : public nsFrameList
{
  // Appends the frame to the end of the list
  void AddChild(nsIFrame* aChild);
};

  // whitespace.

  // We could handle all this in CreateNeededTablePseudos or some other place
  // after we build our frame construction items, but that would involve
  // creating frame construction items for whitespace kids of
  // eExcludesIgnorableWhitespace frames, where we know we'll be dropping them
  // all anyway, and involve an extra walk down the frame construction item
  // list.
  if ((aParentFrame &&
       (!aParentFrame->IsFrameOfType(nsIFrame::eExcludesIgnorableWhitespace) ||
        aParentFrame->IsGeneratedContentFrame())) ||
      !aChildContent->IsNodeOfType(nsINode::eTEXT)) {
    return true;
  }

  aChildContent->SetFlags(NS_CREATE_FRAME_IF_NON_WHITESPACE |
                          NS_REFRAME_IF_WHITESPACE);
  return !aChildContent->TextIsOnlyWhitespace();
}


#ifdef DEBUG
  NS_ASSERTION(!display->IsScrollableOverflow() ||
               state.mPresContext->IsPaginated() ||
               propagatedScrollFrom == aDocElement,
               "Scrollbars should have been propagated to the viewport");
#endif

  if (MOZ_UNLIKELY(display->mDisplayBox == NS_STYLE_DISPLAY_BOX_NONE)) {
    SetUndisplayedContent(aDocElement, styleContext);
    return nullptr;
  }

  TreeMatchContext::AutoAncestorPusher ancestorPusher(state.mTreeMatchContext);
  ancestorPusher.PushAncestorAndStyleScope(aDocElement);

  // Make sure to start any background image loads for the root element now.

  NS_ASSERTION(processChildren ? !mRootElementFrame :
                 mRootElementFrame == contentFrame,
               "unexpected mRootElementFrame");
  mRootElementFrame = contentFrame;

  // Figure out which frame has the main style for the document element,
  // assigning it to mRootElementStyleFrame.
  // Backgrounds should be propagated from that frame to the viewport.
  contentFrame->GetParentStyleContext(&mRootElementStyleFrame);
  bool isChild = mRootElementStyleFrame &&
                 mRootElementStyleFrame->GetParent() == contentFrame;
  if (!isChild) {
    mRootElementStyleFrame = mRootElementFrame;
  }

  if (processChildren) {
    // Still need to process the child content

/* static */
const nsCSSFrameConstructor::FrameConstructionData*
nsCSSFrameConstructor::FindHTMLData(Element* aElement,
                                    nsIAtom* aTag,
                                    int32_t aNameSpaceID,
                                    nsIFrame* aParentFrame,
                                    nsStyleContext* aStyleContext)
{
  MOZ_ASSERT(aStyleContext->StyleDisplay()->mDisplayBox != NS_STYLE_DISPLAY_BOX_NONE);

  // Ignore the tag if it's not HTML content and if it doesn't extend (via XBL)
  // a valid HTML namespace.  This check must match the one in
  // ShouldHaveFirstLineStyle.
  if (aNameSpaceID != kNameSpaceID_XHTML) {
    return nullptr;
  }

  NS_ASSERTION(!aParentFrame ||


  // Don't create a subdocument frame for iframes if we're creating extra frames
  if (aState.mCreatingExtraFrames && aItem.mContent->IsHTML() &&
      aItem.mContent->Tag() == nsGkAtoms::iframe)
  {
    return;
  }

  nsStyleContext* const styleContext = aItem.mStyleContext;
  const nsStyleDisplay* display = styleContext->StyleDisplay();
  nsIContent* const content = aItem.mContent;
  nsIContent* parent = content->GetParent();

  // Push display-box:contents ancestors.
  AutoDisplayBoxContentsAncestorPusher adcp(aState.mTreeMatchContext,
                                            aState.mPresContext,
                                            parent);

  // Get the parent of the content and check if it is a XBL children element.
  // Push the children element as an ancestor here because it does
  // not have a frame and would not otherwise be pushed as an ancestor. It is
  // necessary to do so in order to correctly handle style resolution on
  // descendants.
  nsIContent* parent = content->GetParent();
  TreeMatchContext::AutoAncestorPusher
    insertionPointPusher(aState.mTreeMatchContext);
  if (adcp.IsEmpty() && parent && nsContentUtils::IsContentInsertionPoint(parent)) {
    if (aState.mTreeMatchContext.mAncestorFilter.HasFilter()) {
      insertionPointPusher.PushAncestorAndStyleScope(parent);
    } else {
      insertionPointPusher.PushStyleScope(parent);
    }
  }

  // Push the content as a style ancestor now, so we don't have to do

  if (aState.mTreeMatchContext.mAncestorFilter.HasFilter()) {
    ancestorPusher.PushAncestorAndStyleScope(content);
  } else {
    ancestorPusher.PushStyleScope(content);
  }

  nsIFrame* newFrame;
  nsIFrame* primaryFrame;
  nsStyleContext* const styleContext = aItem.mStyleContext;
  const nsStyleDisplay* display = styleContext->StyleDisplay();
  if (bits & FCDATA_FUNC_IS_FULL_CTOR) {
    newFrame =
      (this->*(data->mFullConstructor))(aState, aItem, aParentFrame,
                                        display, aFrameItems);
    MOZ_ASSERT(newFrame, "Full constructor failed");
    primaryFrame = newFrame;
  } else {
    newFrame =


const nsCSSFrameConstructor::FrameConstructionData*
nsCSSFrameConstructor::FindDisplayData(const nsStyleDisplay* aDisplay,
                                       Element* aElement,
                                       nsIFrame* aParentFrame,
                                       nsStyleContext* aStyleContext)
{
  PR_STATIC_ASSERT(eParentTypeCount < (1 << (32 - FCDATA_PARENT_TYPE_OFFSET)));
  MOZ_ASSERT(aDisplay->mDisplayBox != NS_STYLE_DISPLAY_BOX_NONE);

  // The style system ensures that floated and positioned frames are
  // block-level.
  NS_ASSERTION(!(aDisplay->IsFloatingStyle() ||
                 aDisplay->IsAbsolutelyPositionedStyle()) ||
               aDisplay->IsBlockOutsideStyle(),
               "Style system did not apply CSS2.1 section 9.7 fixups");

  if (aDisplay->mDisplayBox == NS_STYLE_DISPLAY_BOX_CONTENTS) {
    // See the mDisplay/Box fixup code in nsRuleNode::ComputeDisplayData.
    MOZ_ASSERT(!aElement->IsRootOfNativeAnonymousSubtree(),
               "display-box:contents on anonymous content is unsupported");
    static const FrameConstructionData sDisplayBoxContentsData =
      FULL_CTOR_FCDATA(FCDATA_IS_CONTENTS, nullptr/*never called*/);
    return &sDisplayBoxContentsData;
  }

  // If this is "body", try propagating its scroll style to the viewport
  // Note that we need to do this even if the body is NOT scrollable;
  // it might have dynamically changed from scrollable to not scrollable,
  // and that might need to be propagated.
  // XXXbz is this the right place to do this?  If this code moves,
  // make this function static.
  bool propagatedScrollToViewport = false;
  if (aElement->IsHTML(nsGkAtoms::body)) {

  }
}

already_AddRefed<nsStyleContext>
nsCSSFrameConstructor::ResolveStyleContext(nsIFrame*         aParentFrame,
                                           nsIContent*       aContent,
                                           nsFrameConstructorState* aState)
{
  nsIContent* container = aContent->GetParent();
  NS_ASSERTION(container, "Must have parent here");
  nsStyleContext* parentStyleContext = GetDisplayBoxContentsStyleFor(container);
  if (MOZ_LIKELY(!parentStyleContext)) {
    aParentFrame = nsFrame::CorrectStyleParentFrame(aParentFrame, nullptr);
    if (aParentFrame) {
      // Resolve the style context based on the content object and the parent
      // style context
      parentStyleContext = aParentFrame->StyleContext();
    } else {
      // Perhaps aParentFrame is a canvasFrame and we're replicating
      // fixed-pos frames.
      // XXX should we create a way to tell ConstructFrame which style
      // context to use, and pass it the style context for the
      // previous page's fixed-pos frame?
    }
  }

  return ResolveStyleContext(parentStyleContext, aContent, aState);
}

already_AddRefed<nsStyleContext>
nsCSSFrameConstructor::ResolveStyleContext(nsStyleContext* aParentStyleContext,
                                           nsIContent* aContent,


  // Lie about the tag and namespace so we don't trigger anything
  // interesting during frame construction.
  aItems.AppendItem(&sPageBreakData, aContent, nsCSSAnonBoxes::pageBreak,
                    kNameSpaceID_None, nullptr, pseudoStyle.forget(),
                    true, nullptr);
}

bool
nsCSSFrameConstructor::ShouldCreateItemsForChild(nsFrameConstructorState& aState,
                                                 nsIContent* aContent,
                                                 nsContainerFrame* aParentFrame)
                                                 nsContainerFrame* aParentFrame,
                                                 FrameConstructionItemList& aItems)
{
  aContent->UnsetFlags(NODE_DESCENDANTS_NEED_FRAMES | NODE_NEEDS_FRAME);
  if (aContent->IsElement()) {
    // We can't just remove our pending restyle flags, since we may
    // have restyle-later-siblings set on us.  But we _can_ remove the
    // "is possible restyle root" flags, and need to.  Otherwise we can
    // end up with stale such flags (e.g. if we used to have a
    // display:none parent when our last restyle was posted and


  // XXX the GetContent() != aContent check is needed due to bug 135040.
  // Remove it once that's fixed.
  if (aContent->GetPrimaryFrame() &&
      aContent->GetPrimaryFrame()->GetContent() == aContent &&
      !aState.mCreatingExtraFrames) {
    NS_ERROR("asked to create frame construction item for a node that already "
             "has a frame");
    return false;
  }

  // don't create a whitespace frame if aParent doesn't want it
  if (!NeedFrameFor(aState, aParentFrame, aContent)) {
    return false;
  }

  // never create frames for comments or PIs
  if (aContent->IsNodeOfType(nsINode::eCOMMENT) ||
      aContent->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION)) {
    return false;
  }

  return true;
}

void
nsCSSFrameConstructor::DoAddFrameConstructionItems(nsFrameConstructorState& aState,
                                                   nsIContent* aContent,
                                                   nsStyleContext* aStyleContext,
                                                   bool aSuppressWhiteSpaceOptimizations,
                                                   nsContainerFrame* aParentFrame,
                                                   nsTArray<nsIAnonymousContentCreator::ContentInfo>* aAnonChildren,
                                                   FrameConstructionItemList& aItems)
{
  uint32_t flags = ITEM_ALLOW_XBL_BASE | ITEM_ALLOW_PAGE_BREAK;
  if (aParentFrame) {
    if (aParentFrame->IsSVGText()) {
      flags |= ITEM_IS_WITHIN_SVG_TEXT;
    }
    if (aParentFrame->GetType() == nsGkAtoms::blockFrame &&
        aParentFrame->GetParent() &&
        aParentFrame->GetParent()->GetType() == nsGkAtoms::svgTextFrame) {
      flags |= ITEM_ALLOWS_TEXT_PATH_CHILD;
    }
  }
  AddFrameConstructionItemsInternal(aState, aContent, aParentFrame,
                                    aContent->Tag(), aContent->GetNameSpaceID(),
                                    aSuppressWhiteSpaceOptimizations,
                                    aStyleContext,
                                    flags, aAnonChildren,
                                    aItems);
}
  
void
nsCSSFrameConstructor::AddFrameConstructionItems(nsFrameConstructorState& aState,
                                                 nsIContent* aContent,
                                                 bool aSuppressWhiteSpaceOptimizations,
                                                 nsContainerFrame* aParentFrame,
                                                 FrameConstructionItemList& aItems)
{
  if (!ShouldCreateItemsForChild(aState, aContent, aParentFrame)) {
    return;
  }
  nsRefPtr<nsStyleContext> styleContext =
    ResolveStyleContext(aParentFrame, aContent, &aState);
  DoAddFrameConstructionItems(aState, aContent, styleContext,
                              aSuppressWhiteSpaceOptimizations, aParentFrame,
                              nullptr, aItems);
}

/* static */ void
nsCSSFrameConstructor::SetAsUndisplayedContent(FrameConstructionItemList& aList,
                                               nsIContent* aContent,
                                               nsStyleContext* aStyleContext,
                                               bool aIsGeneratedContent)
{
  if (aStyleContext->GetPseudo()) {

      aStyleContext = styleContext;
    }

    aTag = mDocument->BindingManager()->ResolveTag(aContent, &aNameSpaceID);
  }

  bool isGeneratedContent = ((aFlags & ITEM_IS_GENERATED_CONTENT) != 0);

  // Pre-check for display-box:none - if we find that, don't create any frame at all.
  if (NS_STYLE_DISPLAY_BOX_NONE == display->mDisplayBox) {
  if (NS_STYLE_DISPLAY_NONE == display->mDisplay) {
    SetAsUndisplayedContent(aItems, aContent, styleContext, isGeneratedContent);
    return;
  }

  bool isText = !aContent->IsElement();

  // never create frames for non-option/optgroup kids of <select> and
  // non-option kids of <optgroup> inside a <select>.

    !display->IsAbsolutelyPositionedStyle() &&
    !(bits & FCDATA_IS_TABLE_PART) &&
    !(bits & FCDATA_IS_SVG_TEXT);

  if (canHavePageBreak && display->mBreakBefore) {
    AddPageBreakItem(aContent, aStyleContext, aItems);
  }

  if (MOZ_UNLIKELY(bits & FCDATA_IS_CONTENTS)) {
    if (!GetDisplayBoxContentsStyleFor(aContent)) {
      MOZ_ASSERT(styleContext->GetPseudo() || !isGeneratedContent,
                 "Should have had pseudo type");
      aState.mFrameManager->SetDisplayBoxContents(aContent, styleContext);
    } else {
      aState.mFrameManager->ChangeDisplayBoxContents(aContent, styleContext);
    }

    TreeMatchContext::AutoAncestorPusher ancestorPusher(aState.mTreeMatchContext);
    if (aState.mTreeMatchContext.mAncestorFilter.HasFilter()) {
      ancestorPusher.PushAncestorAndStyleScope(aContent->AsElement());
    } else {
      ancestorPusher.PushStyleScope(aContent->AsElement());
    }

    if (aParentFrame) {
      aParentFrame->AddStateBits(NS_FRAME_MAY_HAVE_GENERATED_CONTENT);
    }
    CreateGeneratedContentItem(aState, aParentFrame, aContent, styleContext,
                               nsCSSPseudoElements::ePseudo_before, aItems);

    FlattenedChildIterator iter(aContent);
    for (nsIContent* child = iter.GetNextChild(); child; child = iter.GetNextChild()) {
      if (!ShouldCreateItemsForChild(aState, child, aParentFrame)) {
        continue;
      }

      // Get the parent of the content and check if it is a XBL children element
      // (if the content is a children element then parent != aContent because the
      // FlattenedChildIterator will transitively iterate through <xbl:children>
      // for default content). Push the children element as an ancestor here because
      // it does not have a frame and would not otherwise be pushed as an ancestor.
      nsIContent* parent = child->GetParent();
      MOZ_ASSERT(parent, "Parent must be non-null because we are iterating children.");
      TreeMatchContext::AutoAncestorPusher ancestorPusher(aState.mTreeMatchContext);
      if (parent != aContent && parent->IsElement()) {
        if (aState.mTreeMatchContext.mAncestorFilter.HasFilter()) {
          ancestorPusher.PushAncestorAndStyleScope(parent->AsElement());
        } else {
          ancestorPusher.PushStyleScope(parent->AsElement());
        }
      }

      nsRefPtr<nsStyleContext> childContext =
        ResolveStyleContext(styleContext, child, nullptr);
      DoAddFrameConstructionItems(aState, child, childContext,
                                  aSuppressWhiteSpaceOptimizations,
                                  aParentFrame, aAnonChildren, aItems);
    }
    aItems.SetParentHasNoXBLChildren(!iter.XBLInvolved());

    CreateGeneratedContentItem(aState, aParentFrame, aContent, styleContext,
                               nsCSSPseudoElements::ePseudo_after, aItems);
    if (canHavePageBreak && display->mBreakAfter) {
      AddPageBreakItem(aContent, aStyleContext, aItems);
    }
    return;
  }

  FrameConstructionItem* item =
    aItems.AppendItem(data, aContent, aTag, aNameSpaceID,
                      pendingBinding, styleContext.forget(),
                      aSuppressWhiteSpaceOptimizations, aAnonChildren);
  if (!item) {
    if (isGeneratedContent) {
      aContent->UnbindFromTree();
    }

      ((bits & FCDATA_DISALLOW_OUT_OF_FLOW) ||
       !aState.GetGeometricParent(display, nullptr))) {
    item->mIsLineParticipant = true;
    aItems.LineParticipantItemAdded();
  }
}

static void
AddGenConPseudoToFrame(nsIFrame* aOwnerFrame, nsIContent* aContent)
{
  typedef nsAutoTArray<nsIContent*, 2> T;
  const FramePropertyDescriptor* prop = nsIFrame::GenConProperty();
  FrameProperties props = aOwnerFrame->Properties();
  T* value = static_cast<T*>(props.Get(prop));
  if (!value) {
    value = new T;
    props.Set(prop, value);
  }
  value->AppendElement(aContent);
GenConPseudoToProperty(nsIAtom* aPseudo)
{
  NS_ASSERTION(aPseudo == nsCSSPseudoElements::before ||
               aPseudo == nsCSSPseudoElements::after,
               "Bad gen-con pseudo");
  return aPseudo == nsCSSPseudoElements::before ? BeforeProperty()
      : AfterProperty();
}

/**
 * Return true if the frame construction item pointed to by aIter will
 * create a frame adjacent to a line boundary in the frame tree, and that
 * line boundary is induced by a content node adjacent to the frame's
 * content node in the content tree. The latter condition is necessary so
 * that ContentAppended/ContentInserted/ContentRemoved can easily find any

    // NS_FRAME_GENERATED_CONTENT.
    aState.mAdditionalStateBits |= NS_FRAME_GENERATED_CONTENT;

    // Note that we're not necessarily setting this property on the primary
    // frame for the content for which this is generated content.  We might be
    // setting it on a table pseudo-frame inserted under that instead.  That's
    // OK, though; we just need to do the property set so that the content will
    // get cleaned up when the frame is destroyed.
    ::AddGenConPseudoToFrame(aParentFrame, item.mContent);
                                   item.mContent);

    // Now that we've passed ownership of item.mContent to the frame, unset
    // our generated content flag so we don't release or unbind it ourselves.
    item.mIsGeneratedContent = false;
  }

  // XXXbz maybe just inline ConstructFrameFromItemInternal here or something?
  ConstructFrameFromItemInternal(item, aState, adjParentFrame, aFrameItems);


/**
 * This function will check whether aContainer has :after generated content.
 * If so, appending to it should actually insert.  The return value is the
 * parent to use for newly-appended content.  *aAfterFrame points to the :after
 * frame before which appended content should go, if there is one.
 */
static nsContainerFrame*
AdjustAppendParentForAfterContent(nsFrameManager* aFrameManager,
                                  nsIContent* aContainer,
                                  nsContainerFrame* aParentFrame,
                                  nsIContent* aChild,
                                  nsIFrame** aAfterFrame)
{
  // If the parent frame has any pseudo-elements or aContainer is a
  // display-box:contents node then we need to walk through the child
  // frames to find the first one that is either a ::after frame for an
  // ancestor of aChild or a frame that is for a node later in the
  // document than aChild and return that in aAfterFrame.
  if (aParentFrame->GetGenConPseudos() ||
      nsLayoutUtils::HasPseudoStyle(aContainer, aParentFrame->StyleContext(),
                                    nsCSSPseudoElements::ePseudo_after,
                                    aParentFrame->PresContext()) ||
      aFrameManager->GetDisplayBoxContentsStyleFor(aContainer)) {
    nsIFrame* afterFrame = nullptr;
    nsContainerFrame* parent =
      static_cast<nsContainerFrame*>(aParentFrame->LastContinuation());
    bool done = false;
    while (!done && parent) {
      // Ensure that all normal flow children are on the principal child list.
      parent->DrainSelfOverflowList();

      nsIFrame* child = parent->GetLastChild(nsIFrame::kPrincipalList);
      if (child && child->IsPseudoFrame(aContainer) &&
          !child->IsGeneratedContentFrame()) {
        // Drill down into non-generated pseudo frames of aContainer.
        parent = nsLayoutUtils::LastContinuationWithChild(do_QueryFrame(child));
        continue;
      }

      for (; child; child = child->GetPrevSibling()) {
        nsIContent* c = child->GetContent();
        if (child->IsGeneratedContentFrame()) {
          nsIContent* p = c->GetParent();
          if (c->Tag() == nsGkAtoms::mozgeneratedcontentafter) {
            if (!nsContentUtils::ContentIsDescendantOf(aChild, p) &&
                c->GetBindingParent() != aContainer &&
                nsContentUtils::PositionIsBefore(p, aChild)) {
              // ::after generated content for content earlier in the doc and not
              // for an ancestor.
              done = true;
              break;
            }
          } else if (nsContentUtils::PositionIsBefore(p, aChild)) {
            // Non-::after generated content for content earlier in the doc.
            done = true;
            break;
          }
        } else if (nsContentUtils::PositionIsBefore(c, aChild)) {
          // Content is before aChild.
          done = true;
          break;
        }
        afterFrame = child;
      }

      parent = static_cast<nsContainerFrame*>(parent->GetPrevContinuation());
    }
    if (afterFrame) {
      *aAfterFrame = afterFrame;
      return afterFrame->GetParent();
    }
  }

  *aAfterFrame = nullptr;


      (NS_STYLE_DISPLAY_TABLE_COLUMN       == siblingDisplay) ||
      (NS_STYLE_DISPLAY_TABLE_CAPTION      == siblingDisplay) ||
      (NS_STYLE_DISPLAY_TABLE_HEADER_GROUP == siblingDisplay) ||
      (NS_STYLE_DISPLAY_TABLE_ROW_GROUP    == siblingDisplay) ||
      (NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP == siblingDisplay) ||
      nsGkAtoms::menuFrame == parentType) {
    // if we haven't already, construct a style context to find the display type of aContent
    if (UNSET_DISPLAY == aDisplay) {
      nsIFrame* styleParent;
      aSibling->GetParentStyleContext(&styleParent);
      if (!styleParent) {
        styleParent = aSibling->GetParent();
      }
      if (!styleParent) {
        NS_NOTREACHED("Shouldn't happen");
        return false;
      }
      // XXXbz when this code is killed, the state argument to
      // ResolveStyleContext can be made non-optional.
      nsRefPtr<nsStyleContext> styleContext =
        ResolveStyleContext(styleParent, aContent, nullptr);
      const nsStyleDisplay* display = styleContext->StyleDisplay();
      aDisplay = display->mDisplay;
    }
    if (nsGkAtoms::menuFrame == parentType) {
      return
        (NS_STYLE_DISPLAY_POPUP == aDisplay) ==
        (NS_STYLE_DISPLAY_POPUP == siblingDisplay);
    }

  *aIsAppend = false;

  // Find the frame that precedes the insertion point. Walk backwards
  // from the parent frame to get the parent content, because if an
  // XBL insertion point is involved, we'll need to use _that_ to find
  // the preceding frame.

  NS_PRECONDITION(aParentFrame, "Must have parent frame to start with");
  const bool boxContents = GetDisplayBoxContentsStyleFor(aContainer);
  nsIContent* container = boxContents ? aContainer : aParentFrame->GetContent();

  FlattenedChildIterator iter(container);
  bool xblCase = iter.XBLInvolved() || container != aContainer;
  if (xblCase || !aChild->IsRootOfAnonymousSubtree()) {
    // The check for IsRootOfAnonymousSubtree() is because editor is
    // severely broken and calls us directly for native anonymous
    // nodes that it creates.
    if (aStartSkipChild) {

  uint8_t childDisplay = UNSET_DISPLAY;
  nsIFrame* prevSibling = FindPreviousSibling(iter, childDisplay);

  // Now, find the geometric parent so that we can handle
  // continuations properly. Use the prev sibling if we have it;
  // otherwise use the next sibling.
  if (prevSibling) {
    aParentFrame = prevSibling->GetParent()->GetContentInsertionFrame();
  } else {
  else {
    // If there is no previous sibling, then find the frame that follows
    if (aEndSkipChild) {
      iter.Seek(aEndSkipChild);
      iter.GetPreviousChild();
    }
    nsIFrame* nextSibling = FindNextSibling(iter, childDisplay);
    if (boxContents) {
      if (nextSibling) {
        aParentFrame = nextSibling->GetParent()->GetContentInsertionFrame();
        return nextSibling->GetPrevSibling();
      }
      return GetInsertionPrevSibling(aParentFrame, aContainer->GetParent(),
                                     aContainer, aIsAppend,
                                     aIsRangeInsertSafe, nullptr, nullptr);
    }
    if (nextSibling) {
      aParentFrame = nextSibling->GetParent()->GetContentInsertionFrame();
    } else {
    else {
      // No previous or next sibling, so treat this like an appended frame.
      *aIsAppend = true;
      if (IsFramePartOfIBSplit(aParentFrame)) {
        // Since we're appending, we'll walk to the last anonymous frame
        // that was created for the broken inline frame.  But don't walk
        // to the trailing inline if it's empty; stop at the block.
        aParentFrame = GetLastIBSplitSibling(aParentFrame, false);
      }

      // before the AdjustAppendParentForAfterContent call.
      aParentFrame = nsLayoutUtils::LastContinuationWithChild(aParentFrame);
      // Deal with fieldsets
      aParentFrame = ::GetAdjustedParentFrame(aParentFrame,
                                              aParentFrame->GetType(),
                                              aChild);
      nsIFrame* appendAfterFrame;
      aParentFrame =
        ::AdjustAppendParentForAfterContent(this, container, aParentFrame,
                                            aChild, &appendAfterFrame);
                                            &appendAfterFrame);
      prevSibling = ::FindAppendPrevSibling(aParentFrame, appendAfterFrame);
    }
  }

  *aIsRangeInsertSafe = (childDisplay == UNSET_DISPLAY);
  return prevSibling;
}

nsContainerFrame*
nsCSSFrameConstructor::GetContentInsertionFrameFor(nsIContent* aContent)
{
  // Get the primary frame associated with the content
  nsIFrame* frame = aContent->GetPrimaryFrame();

  if (!frame) {
    if (GetDisplayBoxContentsStyleFor(aContent)) {
      nsIContent* parent = aContent->GetParent();
      frame = parent ? GetContentInsertionFrameFor(parent) : nullptr;
    }
    if (!frame) {
      return nullptr;
    }
  } else {
    // If the content of the frame is not the desired content then this is not
    // really a frame for the desired content.
    // XXX This check is needed due to bug 135040. Remove it once that's fixed.
    if (frame->GetContent() != aContent) {
      return nullptr;
    }
  }

  nsContainerFrame* insertionFrame = frame->GetContentInsertionFrame();

  NS_ASSERTION(!insertionFrame || insertionFrame == frame || !frame->IsLeaf(),
    "The insertion frame is the primary frame or the primary frame isn't a leaf");

  return insertionFrame;
}

static bool
IsSpecialFramesetChild(nsIContent* aContent)
{
  // IMPORTANT: This must match the conditions in nsHTMLFramesetFrame::Init.
  return aContent->IsHTML() &&
    (aContent->Tag() == nsGkAtoms::frameset ||
     aContent->Tag() == nsGkAtoms::frame);
}

    }
    if (!noPrimaryFrame && !content->GetPrimaryFrame()) {
      noPrimaryFrame = true;
    }
    if (!needsFrameBitSet && content->HasFlag(NODE_NEEDS_FRAME)) {
      needsFrameBitSet = true;
    }
#endif
    // XXX no lazy frames for display-box:contents descendants yet (bug 979782).
    if (GetDisplayBoxContentsStyleFor(content)) {
      return false;
    }
    content->SetFlags(NODE_DESCENDANTS_NEED_FRAMES);
    content = content->GetFlattenedTreeParent();
  }
#ifdef DEBUG
  if (content && content->GetPrimaryFrame() &&
      content->GetPrimaryFrame()->IsLeaf()) {
    noPrimaryFrame = needsFrameBitSet = false;
  }

nsCSSFrameConstructor::IssueSingleInsertNofications(nsIContent* aContainer,
                                                    nsIContent* aStartChild,
                                                    nsIContent* aEndChild,
                                                    bool aAllowLazyConstruction)
{
  for (nsIContent* child = aStartChild;
       child != aEndChild;
       child = child->GetNextSibling()) {
    if ((child->GetPrimaryFrame() || GetUndisplayedContent(child) ||
         GetDisplayBoxContentsStyleFor(child))
#ifdef MOZ_XUL
        //  Except listboxes suck, so do NOT skip anything here if
        //  we plan to notify a listbox.
        && !MaybeGetListBoxBodyFrame(aContainer, child)
#endif
        ) {
      // Already have a frame or undisplayed entry for this content; a
      // previous ContentInserted in this loop must have reconstructed

    nsIContent* bindingParent = aContainer->GetBindingParent();
    LAYOUT_PHASE_TEMP_EXIT();
    nsresult rv = RecreateFramesForContent(bindingParent, false);
    LAYOUT_PHASE_TEMP_REENTER();
    return rv;
  }

  // Get the frame associated with the content
  nsContainerFrame* parentFrame = GetContentInsertionFrameFor(aContainer);

  // See comment in ContentRangeInserted for why this is necessary.
  if (!parentFrame && !aContainer->IsActiveChildrenElement()) {
    return NS_OK;
  }

  if (aAllowLazyConstruction &&
      MaybeConstructLazily(CONTENTAPPEND, aContainer, aFirstNewContent)) {

  // We should never get here with fieldsets, since they have multiple
  // insertion points.
  NS_ASSERTION(parentFrame->GetType() != nsGkAtoms::fieldSetFrame,
               "Unexpected parent");

  // Deal with possible :after generated content on the parent
  nsIFrame* parentAfterFrame;
  parentFrame =
    ::AdjustAppendParentForAfterContent(this, aContainer, parentFrame,
                                        aFirstNewContent, &parentAfterFrame);
                                        &parentAfterFrame);

  // Create some new frames
  nsFrameConstructorState state(mPresShell,
                                GetAbsoluteContainingBlock(parentFrame, FIXED_POS),
                                GetAbsoluteContainingBlock(parentFrame, ABS_POS),
                                GetFloatContainingBlock(parentFrame));
  state.mTreeMatchContext.InitAncestors(aContainer->AsElement());


    // the children of the host.
    nsIContent* bindingParent = aContainer->GetBindingParent();
    LAYOUT_PHASE_TEMP_EXIT();
    nsresult rv = RecreateFramesForContent(bindingParent, false);
    LAYOUT_PHASE_TEMP_REENTER();
    return rv;
  }

  nsContainerFrame* parentFrame = GetContentInsertionFrameFor(aContainer);
  // The xbl:children element won't have a frame, but default content can have the children as
  // a parent. While its uncommon to change the structure of the default content itself, a label,
  // for example, can be reframed by having its value attribute set or removed.
  if (!parentFrame && !aContainer->IsActiveChildrenElement()) {
    return NS_OK;
  }

  // Otherwise, we've got parent content. Find its frame.
  NS_ASSERTION(!parentFrame || parentFrame->GetContent() == aContainer ||
               GetDisplayBoxContentsStyleFor(aContainer), "New XBL code is possibly wrong!");

  if (aAllowLazyConstruction &&
      MaybeConstructLazily(CONTENTINSERT, aContainer, aStartChild)) {
    return NS_OK;
  }

  if (isSingleInsert) {
    // See if we have an XBL insertion point. If so, then that's our

                 frame1->GetType() == nsGkAtoms::fieldSetFrame ||
                 (frame1->GetParent() &&
                  frame1->GetParent()->GetType() == nsGkAtoms::fieldSetFrame),
                 "Unexpected frame types");
#endif
    isAppend = true;
    nsIFrame* appendAfterFrame;
    parentFrame =
      ::AdjustAppendParentForAfterContent(this, container,
                                          container,
                                          frameItems.FirstChild()->GetParent(),
                                          aStartChild, &appendAfterFrame);
    prevSibling = ::FindAppendPrevSibling(parentFrame, appendAfterFrame);
  }

  if (haveFirstLineStyle && parentFrame == containingBlock) {
    // It's possible that the new frame goes into a first-line
    // frame. Look at it and see...
    if (isAppend) {
      // Use append logic when appending

           static_cast<void*>(aChild),
           static_cast<void*>(aOldNextSibling));
    if (gReallyNoisyContentUpdates) {
      aContainer->List(stdout, 0);
    }
  }
#endif

  nsresult rv = NS_OK;
  nsresult                  rv = NS_OK;

  // Find the child frame that maps the content
  nsIFrame* childFrame = aChild->GetPrimaryFrame();

  if (!childFrame || childFrame->GetContent() != aChild) {
    // XXXbz the GetContent() != aChild check is needed due to bug 135040.
    // Remove it once that's fixed.
    ClearUndisplayedContentIn(aChild, aContainer);
  }
  MOZ_ASSERT(!childFrame || !GetDisplayBoxContentsStyleFor(aChild),
             "display-box:contents nodes shouldn't have a frame");
  if (!childFrame && GetDisplayBoxContentsStyleFor(aChild)) {
    nsIFrame* ancestorFrame = nullptr;
    nsIContent* ancestor = aContainer;
    for (; ancestor; ancestor = ancestor->GetParent()) {
      ancestorFrame = ancestor->GetPrimaryFrame();
      if (ancestorFrame) {
        break;
      }
    }
    if (ancestorFrame) {
      nsTArray<nsIContent*>* generated = ancestorFrame->GetGenConPseudos();
      if (generated) {
        LAYOUT_PHASE_TEMP_EXIT();
        // XXXmats Can we recreate frames only for the ::after/::before content?
        // XXX Perhaps even only those that belong to the aChild sub-tree?
        RecreateFramesForContent(ancestor, false);
        LAYOUT_PHASE_TEMP_REENTER();
        *aDidReconstruct = true;
        return NS_OK;
      }
    }

    FlattenedChildIterator iter(aChild);
    for (nsIContent* c = iter.GetNextChild(); c; c = iter.GetNextChild()) {
      if (c->GetPrimaryFrame() || GetDisplayBoxContentsStyleFor(c)) {
        LAYOUT_PHASE_TEMP_EXIT();
        rv = ContentRemoved(aChild, c, nullptr, aFlags, aDidReconstruct);
        LAYOUT_PHASE_TEMP_REENTER();
        NS_ENSURE_SUCCESS(rv, rv);
        if (*aDidReconstruct) {
          return rv;
        }
      }
    }
    ClearDisplayBoxContentsIn(aChild, aContainer);
  }

  nsPresContext* presContext = mPresShell->GetPresContext();
#ifdef MOZ_XUL
  if (NotifyListBoxBody(presContext, aContainer, aChild, aOldNextSibling,
                        mDocument, childFrame, CONTENT_REMOVED))
    return NS_OK;

#endif // MOZ_XUL

  // If we're removing the root, then make sure to remove things starting at


  nsIContent* insertionElement;
  if (aChildContent) {
    // We've got an explicit insertion child. Check to see if it's
    // anonymous.
    if (aChildContent->GetBindingParent() == aContainer) {
      // This child content is anonymous. Don't use the insertion
      // point, since that's only for the explicit kids.
      return GetContentInsertionFrameFor(aContainer);
    }

    insertionElement = bindingManager->FindNestedInsertionPoint(aContainer, aChildContent);
  }
  else {
    bool multiple;
    insertionElement = bindingManager->FindNestedSingleInsertionPoint(aContainer, &multiple);


      return nullptr;
    }
  }

  if (!insertionElement) {
    insertionElement = aContainer;
  }

  nsContainerFrame* insertionPoint = GetContentInsertionFrameFor(insertionElement);
    ::GetContentInsertionFrameFor(insertionElement);

  // fieldsets have multiple insertion points.  Note that we might
  // have to look at insertionElement here...
  if (aMultiple && insertionElement->IsHTML(nsGkAtoms::fieldset)) {
    *aMultiple = true;
  }

  return insertionPoint;


static bool EqualURIs(mozilla::css::URLValue *aURI1,
                      mozilla::css::URLValue *aURI2)
{
  return aURI1 == aURI2 ||    // handle null==null, and optimize
         (aURI1 && aURI2 && aURI1->URIEquals(*aURI2));
}

nsStyleContext*
nsCSSFrameConstructor::MaybeRecreateFramesForElement(Element* aElement)
{
  nsRefPtr<nsStyleContext> oldContext = GetUndisplayedContent(aElement);
  uint8_t oldDisplayBoxStyle = NS_STYLE_DISPLAY_BOX_NONE;
  if (!oldContext) {
    oldContext = GetDisplayBoxContentsStyleFor(aElement);
    if (!oldContext) {
      return nullptr;
    }
    oldDisplayBoxStyle = NS_STYLE_DISPLAY_BOX_CONTENTS;
  }

  // The parent has a frame, so try resolving a new context.
  nsRefPtr<nsStyleContext> newContext = mPresShell->StyleSet()->
    ResolveStyleFor(aElement, oldContext->GetParent());

  if (oldDisplayBoxStyle == NS_STYLE_DISPLAY_BOX_NONE) {
    ChangeUndisplayedContent(aElement, newContext);
  } else {
    ChangeDisplayBoxContents(aElement, newContext);
  }

  const nsStyleDisplay* disp = newContext->StyleDisplay();
  if (oldDisplayBoxStyle == disp->mDisplayBox) {
    // We can skip trying to recreate frames here, but only if our style
    // context does not have a binding URI that differs from our old one.
    // Otherwise, we should try to recreate, because we may want to apply the
    // new binding
    if (!disp->mBinding) {
      return newContext;
    }
    const nsStyleDisplay* oldDisp = oldContext->PeekStyleDisplay();
    if (oldDisp && EqualURIs(disp->mBinding, oldDisp->mBinding)) {
      return newContext;
    }
  }

  RecreateFramesForContent(aElement, false);
  return nullptr;
}

static nsIFrame*
FindFirstNonWhitespaceChild(nsIFrame* aParentFrame)
{
  nsIFrame* f = aParentFrame->GetFirstPrincipalChild();
  while (f && f->GetType() == nsGkAtoms::textFrame &&
         f->GetContent()->TextIsOnlyWhitespace()) {

                                  mTempFrameTreeState);

    // If we ever initialize the ancestor filter on |state|, make sure
    // to push the right parent!

    nsRefPtr<nsStyleContext> styleContext;
    styleContext = ResolveStyleContext(aParentFrame, aChild, &state);

    // Pre-check for display-box:none - if we find that, don't create any frame at all.
    // any frame at all
    const nsStyleDisplay* display = styleContext->StyleDisplay();
    if (NS_STYLE_DISPLAY_BOX_NONE == display->mDisplayBox) {
    if (NS_STYLE_DISPLAY_NONE == display->mDisplay) {
      *aNewFrame = nullptr;
      return NS_OK;
    }

    BeginUpdate();

    FrameConstructionItemList items;
    AddFrameConstructionItemsInternal(state, aChild, aParentFrame,





  // may suppress the construction of white-space-only text frames
  // must be skipped for these items and items around them.
  void AddFrameConstructionItems(nsFrameConstructorState& aState,
                                 nsIContent*              aContent,
                                 bool                     aSuppressWhiteSpaceOptimizations,
                                 nsContainerFrame*        aParentFrame,
                                 FrameConstructionItemList& aItems);

  // Helper method for AddFrameConstructionItems etc.
  // Unsets the need-frame/restyle bits on aContent.
  // return true iff we should attempt to create frames for aContent.
  bool ShouldCreateItemsForChild(nsFrameConstructorState& aState,
                                 nsIContent* aContent,
                                 nsContainerFrame* aParentFrame);

  // Helper method for AddFrameConstructionItems etc.
  // Make sure ShouldCreateItemsForChild() returned true before calling this.
  void DoAddFrameConstructionItems(nsFrameConstructorState& aState,
                                   nsIContent* aContent,
                                   nsStyleContext* aStyleContext,
                                   bool aSuppressWhiteSpaceOptimizations,
                                   nsContainerFrame* aParentFrame,
                                   nsTArray<nsIAnonymousContentCreator::ContentInfo>* aAnonChildren,
                                   FrameConstructionItemList& aItems);

  // Construct the frames for the document element.  This can return null if the
  // document element is display:none, or if the document element has a
  // not-yet-loaded XBL binding, or if it's an SVG element that's not <svg>.
  nsIFrame* ConstructDocElementFrame(Element*                 aDocElement,
                                     nsILayoutHistoryState*   aFrameState);

  // Set up our mDocElementContainingBlock correctly for the given root
  // content.

  /* If FCDATA_CREATE_BLOCK_WRAPPER_FOR_ALL_KIDS is set, then create a
     block formatting context wrapper around the kids of this frame
     using the FrameConstructionData's mPseudoAtom for its anonymous
     box type. */
#define FCDATA_CREATE_BLOCK_WRAPPER_FOR_ALL_KIDS 0x40000
  /* If FCDATA_IS_SVG_TEXT is set, then this text frame is a descendant of
     an SVG text frame. */
#define FCDATA_IS_SVG_TEXT 0x80000
  /**
   * display-box:contents
   */
#define FCDATA_IS_CONTENTS 0x100000

  /* Structure representing information about how a frame should be
     constructed.  */
  struct FrameConstructionData {
    // Flag bits that can modify the way the construction happens
    uint32_t mBits;
    // We have exactly one of three types of functions, so use a union for
    // better cache locality for the ones that aren't pointer-to-member.  That

                        nsContainerFrame*        aScrolledFrame,
                        nsIContent*              aContent,
                        nsContainerFrame*        aParentFrame,
                        nsStyleContext*          aStyleContext,
                        bool                     aBuildCombobox,
                        PendingBinding*          aPendingBinding,
                        nsFrameItems&            aFrameItems);

  /**
   * ReResolve style for aElement then recreate frames if required.
   * Do nothing for other types of style changes, except for undisplayed nodes
   * (display:none/contents) which will have their style context updated in the
   * frame manager undisplayed maps.
   * @return null if frames were recreated, the new style context otherwise
   */
  nsStyleContext* MaybeRecreateFramesForElement(Element* aElement);

  // If aAsyncInsert is true then a restyle event will be posted to handle the
  // required ContentInserted call instead of doing it immediately.
  nsresult RecreateFramesForContent(nsIContent* aContent, bool aAsyncInsert);

  // If removal of aFrame from the frame tree requires reconstruction of some
  // containing block (either of aFrame or of its parent) due to {ib} splits or
  // table pseudo-frames, recreate the relevant frame subtree.  The return value

  nsIFrame* GetInsertionPrevSibling(nsContainerFrame*& aParentFrame, /* inout */
                                    nsIContent* aContainer,
                                    nsIContent* aChild,
                                    bool* aIsAppend,
                                    bool* aIsRangeInsertSafe,
                                    nsIContent* aStartSkipChild = nullptr,
                                    nsIContent *aEndSkipChild = nullptr);

  /**
   * Return the insertion frame of the primary frame of aContent, or its nearest
   * ancestor that isn't display-box:contents.
   */
  nsContainerFrame* GetContentInsertionFrameFor(nsIContent* aContent);

  // see if aContent and aSibling are legitimate siblings due to restrictions
  // imposed by table columns
  // XXXbz this code is generally wrong, since the frame for aContent
  // may be constructed based on tag, not based on aDisplay!
  bool IsValidSibling(nsIFrame*              aSibling,
                        nsIContent*            aContent,
                        uint8_t&               aDisplay);


(-)a/layout/base/nsDisplayList.cpp (-4 / +11 lines)

Line	Link Here

Lines 4468-4488 nsDisplayTransform::GetDeltaToPerspectiv	Link Here

4468

4469

  /* For both of the coordinates, if the value of -moz-perspective-origin is a

4469

  /* For both of the coordinates, if the value of -moz-perspective-origin is a

4470

   * percentage, it's relative to the size of the frame.  Otherwise, if it's

4470

   * percentage, it's relative to the size of the frame.  Otherwise, if it's

4471

   * a distance, it's already computed for us!

4471

   * a distance, it's already computed for us!

4472

*/

4472

*/

4473

4474

  //TODO: Should this be using our bounds or the parent's bounds?

4474

  //TODO: Should this be using our bounds or the parent's bounds?

4475

  // How do we handle aBoundsOverride in the latter case?

4475

  // How do we handle aBoundsOverride in the latter case?

4476

  nsIFrame* parent = aFrame->GetParentStyleContextFrame();

4476

  nsIFrame* parent;

4477

  nsStyleContext* psc = aFrame->GetParentStyleContext(&parent);

4478

  if (!psc) {

4479

    return gfxPoint3D();

4480

4477

  if (!parent) {

4481

  if (!parent) {

4478

    return gfxPoint3D();

4482

    parent = aFrame->GetParent();

4479

4483

    if (!parent) {

4480

  const nsStyleDisplay* display = parent->StyleDisplay();

4484

      return gfxPoint3D();

4485

4486

4487

  const nsStyleDisplay* display = psc->StyleDisplay();

4481

  nsRect boundingRect = nsDisplayTransform::GetFrameBoundsForTransform(parent);

4488

  nsRect boundingRect = nsDisplayTransform::GetFrameBoundsForTransform(parent);

4482

4489

4483

  /* Allows us to access named variables by index. */

4490

  /* Allows us to access named variables by index. */

4484

  gfxPoint3D result;

4491

  gfxPoint3D result;

4485

  result.z = 0.0f;

4492

  result.z = 0.0f;

4486

  gfxFloat* coords[2] = {&result.x, &result.y};

4493

  gfxFloat* coords[2] = {&result.x, &result.y};

4487

  const nscoord* dimensions[2] =

4494

  const nscoord* dimensions[2] =

4488

    {&boundingRect.width, &boundingRect.height};

4495

    {&boundingRect.width, &boundingRect.height};






#include "nsFrameManager.h"
#include "GeckoProfiler.h"
#include "nsIStatefulFrame.h"
#include "nsContainerFrame.h"

  #ifdef DEBUG
    //#define DEBUG_UNDISPLAYED_MAP
    //#define DEBUG_DISPLAY_BOX_CONTENTS_MAP
  #else
    #undef DEBUG_UNDISPLAYED_MAP
    #undef DEBUG_DISPLAY_BOX_CONTENTS_MAP
  #endif

using namespace mozilla;
using namespace mozilla::dom;

//----------------------------------------------------------------------

struct PlaceholderMapEntry : public PLDHashEntryHdr {


  nsresult AddNodeFor(nsIContent* aParentContent,
                                  nsIContent* aChild, nsStyleContext* aStyle);

  void RemoveNodeFor(nsIContent* aParentContent,
                                 UndisplayedNode* aNode);

  void RemoveNodesFor(nsIContent* aParentContent);
  UndisplayedNode* UnlinkNodesFor(nsIContent* aParentContent);

  // Removes all entries from the hash table
  void  Clear(void);

protected:
  /**
   * Gets the entry for the provided parent content. If the content
   * is a <xbl:children> element, |**aParentContent| is set to


  if (mRootFrame) {
    mRootFrame->Destroy();
    mRootFrame = nullptr;
  }
  
  delete mUndisplayedMap;
  mUndisplayedMap = nullptr;
  delete mDisplayBoxContentsMap;
  mDisplayBoxContentsMap = nullptr;

  mPresShell = nullptr;
}

//----------------------------------------------------------------------

// Placeholder frame functions
nsPlaceholderFrame*

    PL_DHashTableEnumerate(&mPlaceholderMap, UnregisterPlaceholders, nullptr);
    PL_DHashTableFinish(&mPlaceholderMap);
    mPlaceholderMap.ops = nullptr;
  }
}

//----------------------------------------------------------------------

/* static */ nsStyleContext*
nsFrameManager::GetStyleContextInMap(UndisplayedMap* aMap, nsIContent* aContent)
{
  if (!aContent) {
    return nullptr;
  }
  nsIContent* parent = aContent->GetParent();
  for (UndisplayedNode* node = aMap->GetFirstNode(parent);
         node; node = node->mNext) {
    if (node->mContent == aContent)
      return node->mStyle;
  }

  return nullptr;
}

/* static */ UndisplayedNode*
nsFrameManager::GetAllUndisplayedNodesInMapFor(UndisplayedMap* aMap,
                                               nsIContent* aParentContent)
{
  return aMap ? aMap->GetFirstNode(aParentContent) : nullptr;
}

UndisplayedNode*
nsFrameManager::GetAllUndisplayedContentIn(nsIContent* aParentContent)
{
  return GetAllUndisplayedNodesInMapFor(mUndisplayedMap, aParentContent);
    return nullptr;

  return mUndisplayedMap->GetFirstNode(aParentContent);
}

/* static */ void
nsFrameManager::SetStyleContextInMap(UndisplayedMap* aMap,
                                     nsIContent* aContent,
                                     nsStyleContext* aStyleContext)
{
  NS_PRECONDITION(!aStyleContext->GetPseudo(),
                  "Should only have actual elements here");

#if defined(DEBUG_UNDISPLAYED_MAP) || defined(DEBUG_DISPLAY_BOX_CONTENTS_MAP)
  static int i = 0;
  printf("SetStyleContextInMap(%d): p=%p \n", i++, (void *)aContent);
#endif

  NS_ASSERTION(!GetStyleContextInMap(aMap, aContent),
               "Already have an entry for aContent");

  if (! mUndisplayedMap) {
    mUndisplayedMap = new UndisplayedMap;
  }
  nsIContent* parent = aContent->GetParent();
#ifdef DEBUG
  nsIPresShell* shell = aStyleContext->PresContext()->PresShell();
  NS_ASSERTION(parent || (shell && shell->GetDocument() &&
                          shell->GetDocument()->GetRootElement() == aContent),
               "undisplayed content must have a parent, unless it's the root "
               "element");
#endif
  aMap->AddNodeFor(parent, aContent, aStyleContext);
}

void
nsFrameManager::SetUndisplayedContent(nsIContent* aContent,
                                      nsStyleContext* aStyleContext)
{
  if (!mUndisplayedMap) {
    mUndisplayedMap = new UndisplayedMap;
  }
  SetStyleContextInMap(mUndisplayedMap, aContent, aStyleContext);
}

/* static */ void
nsFrameManager::ChangeStyleContextInMap(UndisplayedMap* aMap,
                                        nsIContent* aContent,
                                        nsStyleContext* aStyleContext)
{
  MOZ_ASSERT(aMap, "expecting a map");

#if defined(DEBUG_UNDISPLAYED_MAP) || defined(DEBUG_DISPLAY_BOX_CONTENTS_MAP)
   static int i = 0;
   printf("ChangeStyleContextInMap(%d): p=%p \n", i++, (void *)aContent);
#endif

  for (UndisplayedNode* node = aMap->GetFirstNode(aContent->GetParent());
         node; node = node->mNext) {
    if (node->mContent == aContent) {
      node->mStyle = aStyleContext;
      return;
    }
  }

  MOZ_CRASH("couldn't find the entry to change");
}

void
nsFrameManager::ClearUndisplayedContentIn(nsIContent* aContent,
                                          nsIContent* aParentContent)
{
#ifdef DEBUG_UNDISPLAYED_MAP
  static int i = 0;

        nsStyleContext *context = GetUndisplayedContent(aContent);
        NS_ASSERTION(context == nullptr, "Found more undisplayed content data after removal");
#endif
        return;
      }
      node = node->mNext;
    }
  }
#ifdef DEBUG_UNDISPLAYED_MAP
  printf( "not found.\n");
#endif
}

void
nsFrameManager::ClearAllUndisplayedContentIn(nsIContent* aParentContent)
{
#ifdef DEBUG_UNDISPLAYED_MAP
  static int i = 0;
  printf("ClearAllUndisplayedContentIn(%d): parent=%p \n", i++, (void*)aParentContent);

  for (nsIContent* child = iter.GetNextChild(); child; child = iter.GetNextChild()) {
    if (child->GetParent() != aParentContent) {
      ClearUndisplayedContentIn(child, child->GetParent());
    }
  }
}

//----------------------------------------------------------------------

void
nsFrameManager::SetDisplayBoxContents(nsIContent* aContent,
                                      nsStyleContext* aStyleContext)
{
  if (!mDisplayBoxContentsMap) {
    mDisplayBoxContentsMap = new UndisplayedMap;
  }
  SetStyleContextInMap(mDisplayBoxContentsMap, aContent, aStyleContext);
}

UndisplayedNode*
nsFrameManager::GetAllDisplayBoxContentsIn(nsIContent* aParentContent)
{
  return GetAllUndisplayedNodesInMapFor(mDisplayBoxContentsMap, aParentContent);
}

void
nsFrameManager::ClearDisplayBoxContentsIn(nsIContent* aContent,
                                          nsIContent* aParentContent)
{
#ifdef DEBUG_DISPLAY_BOX_CONTENTS_MAP
  static int i = 0;
  printf("ClearDisplayBoxContents(%d): content=%p parent=%p --> ", i++, (void *)aContent, (void*)aParentContent);
#endif
  
  if (mDisplayBoxContentsMap) {
    UndisplayedNode* node = mDisplayBoxContentsMap->GetFirstNode(aParentContent);
    while (node) {
      if (node->mContent == aContent) {
        mDisplayBoxContentsMap->RemoveNodeFor(aParentContent, node);

#ifdef DEBUG_DISPLAY_BOX_CONTENTS_MAP
        printf( "REMOVED!\n");
#endif
#ifdef DEBUG
        // make sure that there are no more entries for the same content
        nsStyleContext* context = GetDisplayBoxContentsStyleFor(aContent);
        NS_ASSERTION(context == nullptr, "Found more entries for aContent after removal");
#endif
        ClearAllDisplayBoxContentsIn(aContent);
        ClearAllUndisplayedContentIn(aContent);
        return;
      }
      node = node->mNext;
    }
  }
#ifdef DEBUG_DISPLAY_BOX_CONTENTS_MAP
  printf( "not found.\n");
#endif
}

void
nsFrameManager::ClearAllDisplayBoxContentsIn(nsIContent* aParentContent)
{
#ifdef DEBUG_DISPLAY_BOX_CONTENTS_MAP
  static int i = 0;
  printf("ClearAllDisplayBoxContentsIn(%d): parent=%p \n", i++, (void*)aParentContent);
#endif

  if (mDisplayBoxContentsMap) {
    UndisplayedNode* cur = mDisplayBoxContentsMap->UnlinkNodesFor(aParentContent);
    while (cur) {
      UndisplayedNode* next = cur->mNext;
      cur->mNext = nullptr;
      ClearAllDisplayBoxContentsIn(cur->mContent);
      ClearAllUndisplayedContentIn(cur->mContent);
      delete cur;
      cur = next;
    }
  }

  // Need to look at aParentContent's content list due to XBL insertions.
  // Nodes in aParentContent's content list do not have aParentContent as a
  // parent, but are treated as children of aParentContent. We iterate over
  // the flattened content list and just ignore any nodes we don't care about.
  FlattenedChildIterator iter(aParentContent);
  for (nsIContent* child = iter.GetNextChild(); child; child = iter.GetNextChild()) {
    if (child->GetParent() != aParentContent) {
      ClearDisplayBoxContentsIn(child, child->GetParent());
      ClearUndisplayedContentIn(child, child->GetParent());
    }
  }
}

//----------------------------------------------------------------------
void
nsFrameManager::AppendFrames(nsContainerFrame* aParentFrame,
                             ChildListID       aListID,
                             nsFrameList&      aFrameList)
{
  if (aParentFrame->IsAbsoluteContainer() &&
      aListID == aParentFrame->GetAbsoluteListID()) {
    aParentFrame->GetAbsoluteContainingBlock()->

//----------------------------------------------------------------------

void
nsFrameManager::NotifyDestroyingFrame(nsIFrame* aFrame)
{
  nsIContent* content = aFrame->GetContent();
  if (content && content->GetPrimaryFrame() == aFrame) {
    ClearAllUndisplayedContentIn(content);
    ClearAllDisplayBoxContentsIn(content);
  }
}

// Capture state for a given frame.
// Accept a content id here, in some cases we may not have content (scroll position)
void
nsFrameManager::CaptureFrameStateFor(nsIFrame* aFrame,
                                     nsILayoutHistoryState* aState)

        }
        node = node->mNext;
      }
    }
  }
  delete aNode;
}


UndisplayedNode*
nsFrameManagerBase::UndisplayedMap::UnlinkNodesFor(nsIContent* aParentContent)
{
  PLHashEntry** entry = GetEntryFor(&aParentContent);
  NS_ASSERTION(entry, "content not in map");
  if (*entry) {
    UndisplayedNode* node = (UndisplayedNode*)((*entry)->value);
    NS_ASSERTION(node, "null node for non-null entry in UndisplayedMap");
    delete node;
    PL_HashTableRawRemove(mTable, entry, *entry);
    mLastLookup = nullptr; // hashtable may have shifted bucket out from under us
    return node;
  }
  return nullptr;
}

void
nsFrameManagerBase::UndisplayedMap::RemoveNodesFor(nsIContent* aParentContent)
{
  delete UnlinkNodesFor(aParentContent);
}

static int
RemoveUndisplayedEntry(PLHashEntry* he, int i, void* arg)
{
  UndisplayedNode*  node = (UndisplayedNode*)(he->value);
  delete node;
  // Remove and free this entry and continue enumerating

(-)a/layout/base/nsFrameManager.h (-4 / +71 lines)

Line	Link Here

Lines 103-129 public:	Link Here

103

    RegisterPlaceholderFrame(nsPlaceholderFrame* aPlaceholderFrame);

103

    RegisterPlaceholderFrame(nsPlaceholderFrame* aPlaceholderFrame);

104

105

  void

105

  void

106

    UnregisterPlaceholderFrame(nsPlaceholderFrame* aPlaceholderFrame);

106

    UnregisterPlaceholderFrame(nsPlaceholderFrame* aPlaceholderFrame);

107

108

  void      ClearPlaceholderFrameMap();

108

  void      ClearPlaceholderFrameMap();

109

110

  // Mapping undisplayed content

110

  // Mapping undisplayed content

111

  nsStyleContext* GetUndisplayedContent(nsIContent* aContent);

111

  nsStyleContext* GetUndisplayedContent(nsIContent* aContent)

112

113

    if (!mUndisplayedMap) {

114

      return nullptr;

115

116

    return GetStyleContextInMap(mUndisplayedMap, aContent);

117

112

  mozilla::UndisplayedNode*

118

  mozilla::UndisplayedNode*

113

    GetAllUndisplayedContentIn(nsIContent* aParentContent);

119

    GetAllUndisplayedContentIn(nsIContent* aParentContent);

114

  void SetUndisplayedContent(nsIContent* aContent,

120

  void SetUndisplayedContent(nsIContent* aContent,

115

                                         nsStyleContext* aStyleContext);

121

                             nsStyleContext* aStyleContext);

116

  void ChangeUndisplayedContent(nsIContent* aContent,

122

  void ChangeUndisplayedContent(nsIContent* aContent,

117

                                            nsStyleContext* aStyleContext);

123

                                nsStyleContext* aStyleContext)

124

125

    ChangeStyleContextInMap(mUndisplayedMap, aContent, aStyleContext);

126

127

118

  void ClearUndisplayedContentIn(nsIContent* aContent,

128

  void ClearUndisplayedContentIn(nsIContent* aContent,

119

                                             nsIContent* aParentContent);

129

                                 nsIContent* aParentContent);

120

  void ClearAllUndisplayedContentIn(nsIContent* aParentContent);

130

  void ClearAllUndisplayedContentIn(nsIContent* aParentContent);

121

131

132

  // display-box:contents related methods:

133

/**

134

   * Return the registered display-box:contents style context for aContent, if any.

135

*/

136

  nsStyleContext* GetDisplayBoxContentsStyleFor(nsIContent* aContent)

137

138

    if (!mDisplayBoxContentsMap) {

139

      return nullptr;

140

141

    return GetStyleContextInMap(mDisplayBoxContentsMap, aContent);

142

143

144

/**

145

   * Return the linked list of UndisplayedNodes containing the registered

146

   * display-box:contents children of aParentContent, if any.

147

*/

148

  mozilla::UndisplayedNode*

149

    GetAllDisplayBoxContentsIn(nsIContent* aParentContent);

150

/**

151

   * Register aContent having a display-box:contents style context.

152

*/

153

  void SetDisplayBoxContents(nsIContent* aContent,

154

                             nsStyleContext* aStyleContext);

155

/**

156

   * Change the registered style context for aContent to aStyleContext.

157

*/

158

  void ChangeDisplayBoxContents(nsIContent* aContent,

159

                                nsStyleContext* aStyleContext)

160

161

    ChangeStyleContextInMap(mDisplayBoxContentsMap, aContent, aStyleContext);

162

163

164

/**

165

   * Unregister the display-box:contents style context for aContent, if any.

166

   * If found, then also unregister any display-box:contents and display:none

167

   * style contexts for its descendants.

168

*/

169

  void ClearDisplayBoxContentsIn(nsIContent* aContent,

170

                                 nsIContent* aParentContent);

171

/**

172

   * Unregister display-box:contents and display:none style contexts for all

173

   * descendants of aParentContent.

174

*/

175

  void ClearAllDisplayBoxContentsIn(nsIContent* aParentContent);

176

122

  // Functions for manipulating the frame model

177

  // Functions for manipulating the frame model

123

  void AppendFrames(nsContainerFrame* aParentFrame,

178

  void AppendFrames(nsContainerFrame* aParentFrame,

124

                    ChildListID       aListID,

179

                    ChildListID       aListID,

125

                    nsFrameList&      aFrameList);

180

                    nsFrameList&      aFrameList);

126

181

127

  void InsertFrames(nsContainerFrame* aParentFrame,

182

  void InsertFrames(nsContainerFrame* aParentFrame,

128

                    ChildListID       aListID,

183

                    ChildListID       aListID,

129

                    nsIFrame*         aPrevFrame,

184

                    nsIFrame*         aPrevFrame,

Lines 156-166 public:	Link Here

156

/*

211

/*

157

   * Add/restore state for one frame

212

   * Add/restore state for one frame

158

*/

213

*/

159

  void CaptureFrameStateFor(nsIFrame*              aFrame,

214

  void CaptureFrameStateFor(nsIFrame*              aFrame,

160

                                        nsILayoutHistoryState* aState);

215

                                        nsILayoutHistoryState* aState);

161

216

162

  void RestoreFrameStateFor(nsIFrame*              aFrame,

217

  void RestoreFrameStateFor(nsIFrame*              aFrame,

163

                                        nsILayoutHistoryState* aState);

218

                                        nsILayoutHistoryState* aState);

219

protected:

220

  static nsStyleContext* GetStyleContextInMap(UndisplayedMap* aMap,

221

                                              nsIContent* aContent);

222

  static mozilla::UndisplayedNode*

223

    GetAllUndisplayedNodesInMapFor(UndisplayedMap* aMap,

224

                                   nsIContent* aParentContent);

225

  static void SetStyleContextInMap(UndisplayedMap* aMap,

226

                                   nsIContent* aContent,

227

                                   nsStyleContext* aStyleContext);

228

  static void ChangeStyleContextInMap(UndisplayedMap* aMap,

229

                                      nsIContent* aContent,

230

                                      nsStyleContext* aStyleContext);

164

};

231

};

165

232

166

#endif

233

#endif





class nsFrameManagerBase
{
public:
  nsFrameManagerBase()
    : mPresShell(nullptr)
    , mStyleSet(nullptr)
    , mRootFrame(nullptr)
    , mUndisplayedMap(nullptr)
    , mDisplayBoxContentsMap(nullptr)
    , mIsDestroyingFrames(false)
  {
    mPlaceholderMap.ops = nullptr;
  }

  bool IsDestroyingFrames() { return mIsDestroyingFrames; }

  /*


  // weak link, because the pres shell owns us
  nsIPresShell*                   mPresShell;
  // the pres shell owns the style set
  nsStyleSet*                     mStyleSet;
  nsIFrame*                       mRootFrame;
  PLDHashTable                    mPlaceholderMap;
  UndisplayedMap*                 mUndisplayedMap;
  UndisplayedMap*                 mDisplayBoxContentsMap;
  bool                            mIsDestroyingFrames;  // The frame manager is destroying some frame(s).

  // The frame tree generation number
  // We use this to avoid unnecessary screenshotting
  // on Android. Unfortunately, this is static to match
  // the single consumer which is also static. Keeping
  // this the same greatly simplifies lifetime issues and
  // makes sure we always using the correct number.

-      Line
+  Link Here
-       Lines 903-985
      nsLayoutUtils::LastContinuationWithChild
+  Link Here
   NS_PRECONDITION(aFrame, "NULL frame pointer");
   nsIFrame* f = aFrame->LastContinuation();
   while (!f->GetFirstPrincipalChild() && f->GetPrevContinuation()) {
     f = f->GetPrevContinuation();
+  }
   return static_cast<nsContainerFrame*>(f);
+}
+/**
+ * GetFirstChildFrame returns the first "real" child frame of a
+ * given frame.  It will descend down into pseudo-frames (unless the
+ * pseudo-frame is the :before generated frame).
+ * @param aFrame the frame
+ * @param aFrame the frame's content node
+ */
+static nsIFrame*
+GetFirstChildFrame(nsIFrame*       aFrame,
+                   nsIContent*     aContent)
+{
+  NS_PRECONDITION(aFrame, "NULL frame pointer");
+  // Get the first child frame
+  nsIFrame* childFrame = aFrame->GetFirstPrincipalChild();
+  // If the child frame is a pseudo-frame, then return its first child.
+  // Note that the frame we create for the generated content is also a
+  // pseudo-frame and so don't drill down in that case
+  if (childFrame &&
+      childFrame->IsPseudoFrame(aContent) &&
+      !childFrame->IsGeneratedContentFrame()) {
+    return GetFirstChildFrame(childFrame, aContent);
+  }
+  return childFrame;
+}
+/**
+ * GetLastChildFrame returns the last "real" child frame of a
+ * given frame.  It will descend down into pseudo-frames (unless the
+ * pseudo-frame is the :after generated frame).
+ * @param aFrame the frame
+ * @param aFrame the frame's content node
+ */
+static nsIFrame*
+GetLastChildFrame(nsContainerFrame* aFrame,
+                  nsIContent*       aContent)
+{
+  NS_PRECONDITION(aFrame, "NULL frame pointer");
+  // Get the last continuation frame that's a parent
+  nsContainerFrame* lastParentContinuation =
+    nsLayoutUtils::LastContinuationWithChild(aFrame);
+  nsIFrame* lastChildFrame =
+    lastParentContinuation->GetLastChild(nsIFrame::kPrincipalList);
+  if (lastChildFrame) {
+    // Get the frame's first continuation. This matters in case the frame has
+    // been continued across multiple lines or split by BiDi resolution.
+    lastChildFrame = lastChildFrame->FirstContinuation();
+    // If the last child frame is a pseudo-frame, then return its last child.
+    // Note that the frame we create for the generated content is also a
+    // pseudo-frame and so don't drill down in that case
+    if (lastChildFrame &&
+        lastChildFrame->IsPseudoFrame(aContent) &&
+        !lastChildFrame->IsGeneratedContentFrame()) {
+      return GetLastChildFrame(static_cast<nsContainerFrame*>(lastChildFrame),
+                               aContent);
+    }
+    return lastChildFrame;
+  }
+  return nullptr;
+}
 //static
 FrameChildListID
 nsLayoutUtils::GetChildListNameFor(nsIFrame* aChildFrame)
+{
   nsIFrame::ChildListID id = nsIFrame::kPrincipalList;
   if (aChildFrame->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) {
     nsIFrame* pif = aChildFrame->GetPrevInFlow();
-       Lines 1068-1121
      nsLayoutUtils::GetChildListNameFor(nsIFr
+  Link Here
     // else it's positioned and should have been on the 'id' child list.
     NS_POSTCONDITION(found, "not in child list");
+  }
 #endif
   return id;
+}
+/*static*/ nsIFrame*
+nsLayoutUtils::GetBeforeFrameForContent(nsIFrame* aFrame,
+                                        nsIContent* aContent)
+{
+  nsContainerFrame* genConParentFrame = aFrame->GetContentInsertionFrame();
+  if (!genConParentFrame) {
+    return nullptr;
+  }
+  nsTArray<nsIContent*>* prop = genConParentFrame->GetGenConPseudos();
+  if (prop) {
+    const nsTArray<nsIContent*>& pseudos(*prop);
+    for (uint32_t i = 0; i < pseudos.Length(); ++i) {
+      if (pseudos[i]->GetParent() == aContent &&
+          pseudos[i]->Tag() == nsGkAtoms::mozgeneratedcontentbefore) {
+        return pseudos[i]->GetPrimaryFrame();
+      }
+    }
+  }
+  // If the first child frame is a pseudo-frame, then try that.
+  // Note that the frame we create for the generated content is also a
+  // pseudo-frame and so don't drill down in that case.
+  nsIFrame* childFrame = genConParentFrame->GetFirstPrincipalChild();
+  if (childFrame &&
+      childFrame->IsPseudoFrame(aContent) &&
+      !childFrame->IsGeneratedContentFrame()) {
+    return GetBeforeFrameForContent(childFrame, aContent);
+  }
+  return nullptr;
+}
+/*static*/ nsIFrame*
 nsLayoutUtils::GetBeforeFrame(nsIFrame* aFrame)
+{
+  return GetBeforeFrameForContent(aFrame, aFrame->GetContent());
+}
+/*static*/ nsIFrame*
+nsLayoutUtils::GetAfterFrameForContent(nsIFrame* aFrame,
+                                       nsIContent* aContent)
+{
+  nsContainerFrame* genConParentFrame = aFrame->GetContentInsertionFrame();
+  if (!genConParentFrame) {
     return nullptr;
+  }
+  nsTArray<nsIContent*>* prop = genConParentFrame->GetGenConPseudos();
+  if (prop) {
+    const nsTArray<nsIContent*>& pseudos(*prop);
+    for (uint32_t i = 0; i < pseudos.Length(); ++i) {
+      if (pseudos[i]->GetParent() == aContent &&
+          pseudos[i]->Tag() == nsGkAtoms::mozgeneratedcontentafter) {
+        return pseudos[i]->GetPrimaryFrame();
+      }
+    }
+  }
+  // If the last child frame is a pseudo-frame, then try that.
+  // Note that the frame we create for the generated content is also a
+  // pseudo-frame and so don't drill down in that case.
+  nsIFrame* lastParentContinuation =
+    nsLayoutUtils::LastContinuationWithChild(genConParentFrame);
+  nsIFrame* childFrame =
+    lastParentContinuation->GetLastChild(nsIFrame::kPrincipalList);
+  if (childFrame &&
+      childFrame->IsPseudoFrame(aContent) &&
+      !childFrame->IsGeneratedContentFrame()) {
+    return GetAfterFrameForContent(childFrame->FirstContinuation(), aContent);
+  }
   return nullptr;
+}
+/*static*/ nsIFrame*
 nsLayoutUtils::GetAfterFrame(nsIFrame* aFrame)
+{
+  return GetAfterFrameForContent(aFrame, aFrame->GetContent());
+  nsContainerFrame* cif = aFrame->GetContentInsertionFrame();
+  if (!cif) {
+    return nullptr;
+  }
+  nsIFrame* lastFrame = GetLastChildFrame(cif, aFrame->GetContent());
+  if (lastFrame && IsGeneratedContentFor(nullptr, lastFrame,
+                                         nsCSSPseudoElements::after)) {
+    return lastFrame;
+  }
+  return nullptr;
+}
 // static
 nsIFrame*
 nsLayoutUtils::GetClosestFrameOfType(nsIFrame* aFrame, nsIAtom* aFrameType)
+{
   for (nsIFrame* frame = aFrame; frame; frame = frame->GetParent()) {
     if (frame->GetType() == aFrameType) {






  /**
   * Use heuristics to figure out the child list that
   * aChildFrame is currently in.
   */
  static mozilla::layout::FrameChildListID GetChildListNameFor(nsIFrame* aChildFrame);

  /**
   * GetBeforeFrameForContent returns the ::before frame for aContent, if
   * one exists.  This is typically O(1).  The frame passed in must be
   * the first-in-flow.
   *
   * @param aGenConParentFrame an ancestor of the ::before frame
   * @param aContent the content whose ::before is wanted
   * @return the ::before frame or nullptr if there isn't one
   */
  static nsIFrame* GetBeforeFrameForContent(nsIFrame* aGenConParentFrame,
                                            nsIContent* aContent);

  /**
   * GetBeforeFrame returns the outermost ::before frame of the given frame, if
   * one exists.  This is typically O(1).  The frame passed in must be
   * the first-in-flow.
   *
   * @param aFrame the frame whose ::before is wanted
   * @return the :before frame or nullptr if there isn't one
   */
  static nsIFrame* GetBeforeFrame(nsIFrame* aFrame);

  /**
   * GetAfterFrameForContent returns the ::after frame for aContent, if one
   * exists.  This will walk the in-flow chain of aGenConParentFrame to the
   * last-in-flow if needed.  This function is typically O(N) in the number
   * of child frames, following in-flows, etc.
   *
   * @param aGenConParentFrame an ancestor of the ::after frame
   * @param aContent the content whose ::after is wanted
   * @return the ::after frame or nullptr if there isn't one
   */
  static nsIFrame* GetAfterFrameForContent(nsIFrame* aGenConParentFrame,
                                           nsIContent* aContent);

  /**
   * GetAfterFrame returns the outermost ::after frame of the given frame, if one
   * exists.  This will walk the in-flow chain to the last-in-flow if
   * needed.  This function is typically O(N) in the number of child
   * frames, following in-flows, etc.
   *
   * @param aFrame the frame whose ::after is wanted
   * @return the :after frame or nullptr if there isn't one
   */
  static nsIFrame* GetAfterFrame(nsIFrame* aFrame);

  /**
   * Given a frame, search up the frame tree until we find an
   * ancestor that (or the frame itself) is of type aFrameType, if any.
   *






/*
 * a list of the recomputation that needs to be done in response to a
 * style change
 */

#include "nsStyleChangeList.h"
#include "nsIContent.h"
#include "nsIFrame.h"
#include "nsFrameManager.h"

static const uint32_t kGrowArrayBy = 10;

nsStyleChangeList::nsStyleChangeList()
  : mArray(mBuffer),
    mArraySize(kStyleChangeBufferSize),
    mCount(0)
{

nsresult 
nsStyleChangeList::AppendChange(nsIFrame* aFrame, nsIContent* aContent, nsChangeHint aHint)
{
  NS_ASSERTION(aFrame || (aHint & nsChangeHint_ReconstructFrame),
               "must have frame");
  NS_ASSERTION(aContent || !(aHint & nsChangeHint_ReconstructFrame),
               "must have content");
  // XXXbz we should make this take Element instead of nsIContent
  NS_ASSERTION(!aContent || aContent->IsElement() ||
               // display-box:contents elements posts the changes for their children:
               (aFrame && aContent->GetParent() &&
                aFrame->PresContext()->FrameManager()->GetDisplayBoxContentsStyleFor(aContent->GetParent())),
               "Shouldn't be trying to restyle non-elements directly, "
               "except if it's a display-box:contents child");
  NS_ASSERTION(!(aHint & nsChangeHint_AllReflowHints) ||
               (aHint & nsChangeHint_NeedReflow),
               "Reflow hint bits set without actually asking for a reflow");

  if ((0 < mCount) && (aHint & nsChangeHint_ReconstructFrame)) { // filter out all other changes for same content
    if (aContent) {
      for (int32_t index = mCount - 1; index >= 0; --index) {
        if (aContent == mArray[index].mContent) { // remove this change





  aTo += nsPrintfCString(" [sc=%p", static_cast<void*>(mStyleContext));
  if (mStyleContext) {
    nsIAtom* pseudoTag = mStyleContext->GetPseudo();
    if (pseudoTag) {
      nsAutoString atomString;
      pseudoTag->ToString(atomString);
      aTo += nsPrintfCString("%s", NS_LossyConvertUTF16toASCII(atomString).get());
    }
    if (!mStyleContext->GetParent() ||
        (GetParent() && GetParent()->StyleContext() != mStyleContext->GetParent())) {
      aTo += nsPrintfCString("^%p", mStyleContext->GetParent());
      if (mStyleContext->GetParent()) {
        aTo += nsPrintfCString("^%p", mStyleContext->GetParent()->GetParent());
        if (mStyleContext->GetParent()->GetParent()) {
          aTo += nsPrintfCString("^%p", mStyleContext->GetParent()->GetParent()->GetParent());
        }
      }
    }
  }
  aTo += "]";
}

void
nsIFrame::List(FILE* out, const char* aPrefix, uint32_t aFlags) const
{

  // We can get here if the root element is absolutely positioned.
  // We can't test for this very accurately, but it can only happen
  // when the prospective parent is a canvas frame.
  NS_ASSERTION(aProspectiveParent->GetType() == nsGkAtoms::canvasFrame,
               "Should have found a parent before this");
  return nullptr;
}

nsStyleContext*
nsFrame::DoGetParentStyleContext(nsIFrame** aProviderFrame) const
{
  *aProviderFrame = nullptr;
  nsFrameManager* fm = PresContext()->FrameManager();
  if (MOZ_LIKELY(mContent)) {
    nsIContent* parentContent = mContent->GetParent();
    if (MOZ_LIKELY(parentContent)) {
      nsIAtom* pseudo = StyleContext()->GetPseudo();
      if (!pseudo || !mContent->IsElement() ||
          !nsCSSAnonBoxes::IsAnonBox(pseudo) ||
          /* if next is true then it's really a request for the table frame's
             parent context, see nsTable[Outer]Frame::GetParentStyleContext. */
          pseudo == nsCSSAnonBoxes::tableOuter) {
        nsStyleContext* sc = fm->GetDisplayBoxContentsStyleFor(parentContent);
        if (MOZ_UNLIKELY(sc)) {
          return sc;
        }
      }
    } else {
      if (!StyleContext()->GetPseudo()) {
        // we're a frame for the root.  We have no style context parent.
        return nullptr;
      }
    }
  }

  if (!(mState & NS_FRAME_OUT_OF_FLOW)) {
    /*
     * If this frame is an anonymous block created when an inline with a block
     * inside it got split, then the parent style context is on its preceding
     * inline. We can get to it using GetIBSplitSiblingForAnonymousBlock.
     */
    if (mState & NS_FRAME_PART_OF_IBSPLIT) {
      nsIFrame* ibSplitSibling = GetIBSplitSiblingForAnonymousBlock(this);
      if (ibSplitSibling) {
        return (*aProviderFrame = ibSplitSibling)->StyleContext();
      }
    }

    // If this frame is one of the blocks that split an inline, we must
    // return the "special" inline parent, i.e., the parent that this
    // frame would have if we didn't mangle the frame structure.
    *aProviderFrame = GetCorrectedParent(this);
    return *aProviderFrame ? (*aProviderFrame)->StyleContext() : nullptr;
  }

  // We're an out-of-flow frame.  For out-of-flow frames, we must
  // resolve underneath the placeholder's parent.  The placeholder is
  // reached from the first-in-flow.
  nsIFrame* placeholder = fm->GetPlaceholderFrameFor(FirstInFlow());
                            GetPlaceholderFrameFor(FirstInFlow());
  if (!placeholder) {
    NS_NOTREACHED("no placeholder frame for out-of-flow frame");
    *aProviderFrame = GetCorrectedParent(this);
    return *aProviderFrame ? (*aProviderFrame)->StyleContext() : nullptr;
  }
  return placeholder->GetParentStyleContext(aProviderFrame);
}

void
nsFrame::GetLastLeaf(nsPresContext* aPresContext, nsIFrame **aFrame)
{
  if (!aFrame || !*aFrame)
    return;
  nsIFrame *child = *aFrame;

}

void
nsIFrame::DestroyRegion(void* aPropertyValue)
{
  delete static_cast<nsRegion*>(aPropertyValue);
}

/*static*/ void
nsIFrame::DestroyContentArray(void* aPropertyValue)
{
  typedef nsTArray<nsIContent*> T;
  T* arr = static_cast<T*>(aPropertyValue);
  for (T::size_type i = 0; i < arr->Length(); ++i) {
    nsIContent* content = (*arr)[i];
    content->UnbindFromTree();
    NS_RELEASE(content);
  }
  delete arr;
}

bool
nsIFrame::IsPseudoStackingContextFromStyle() {
  const nsStyleDisplay* disp = StyleDisplay();
  // If you change this, also change the computation of pseudoStackingContext
  // in BuildDisplayListForChild()
  return disp->mOpacity != 1.0f ||
         disp->IsPositioned(this) ||
         disp->IsFloating(this) ||






  virtual nsresult  GetOffsets(int32_t &aStart, int32_t &aEnd) const MOZ_OVERRIDE;
  virtual void ChildIsDirty(nsIFrame* aChild) MOZ_OVERRIDE;

#ifdef ACCESSIBILITY
  virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
#endif

  virtual nsStyleContext* GetParentStyleContext(nsIFrame** aProviderFrame) const MOZ_OVERRIDE {
    return DoGetParentStyleContext(aProviderFrame);
  }

  /**
   * Do the work for getting the parent style context frame so that
   * other frame's |GetParentStyleContext| methods can call this
   * method on *another* frame.  (This function handles out-of-flow
   * frames by using the frame manager's placeholder map and it also
   * handles block-within-inline and generated content wrappers.)
   *
   * @param aProviderFrame (out) the frame associated with the returned value
   *     or null if the style context is for display-box:contents content.
   * @return The style context that should be the parent of this frame's
   *         style context.  Null is permitted, and means that this frame's
   *         style context should be the root of the style context tree.
   */
  nsStyleContext* DoGetParentStyleContext(nsIFrame** aProviderFrame) const;

  virtual bool IsEmpty() MOZ_OVERRIDE;
  virtual bool IsSelfEmpty() MOZ_OVERRIDE;

  virtual void MarkIntrinsicWidthsDirty() MOZ_OVERRIDE;
  virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
  virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
  virtual void AddInlineMinWidth(nsRenderingContext *aRenderingContext,






  static void DestroyOverflowAreas(void* aPropertyValue)
  {
    delete static_cast<nsOverflowAreas*>(aPropertyValue);
  }

  static void DestroySurface(void* aPropertyValue);
  static void DestroyDT(void* aPropertyValue);
  static void DestroyContentArray(void* aPropertyValue);

#ifdef _MSC_VER
// XXX Workaround MSVC issue by making the static FramePropertyDescriptor
// non-const.  See bug 555727.
#define NS_PROPERTY_DESCRIPTOR_CONST
#else
#define NS_PROPERTY_DESCRIPTOR_CONST const
#endif


  NS_DECLARE_FRAME_PROPERTY(CachedBackgroundImage, DestroySurface)
  NS_DECLARE_FRAME_PROPERTY(CachedBackgroundImageDT, DestroyDT)

  NS_DECLARE_FRAME_PROPERTY(InvalidationRect, DestroyRect)

  NS_DECLARE_FRAME_PROPERTY(RefusedAsyncAnimation, nullptr)

  NS_DECLARE_FRAME_PROPERTY(GenConProperty, DestroyContentArray)

  nsTArray<nsIContent*>* GetGenConPseudos() {
    const FramePropertyDescriptor* prop = GenConProperty();
    return static_cast<nsTArray<nsIContent*>*>(Properties().Get(prop));
  }

  /**
   * Return the distance between the border edge of the frame and the
   * margin edge of the frame.  Like GetRect(), returns the dimensions
   * as of the most recent reflow.
   *
   * This doesn't include any margin collapsing that may have occurred.
   *
   * It also treats 'auto' margins as zero, and treats any margins that

  /**
   * Get the frame whose style context should be the parent of this
   * frame's style context (i.e., provide the parent style context).
   * This frame must either be an ancestor of this frame or a child.  If
   * this returns a child frame, then the child frame must be sure to
   * return a grandparent or higher!  Furthermore, if a child frame is
   * returned it must have the same GetContent() as this frame.
   *
   * @param aProviderFrame (out) the frame associated with the returned value
   *     or nullptr if the style context is for display-box:contents content.
   * @return The style context that should be the parent of this frame's
   *         style context.  Null is permitted, and means that this frame's
   *         style context should be the root of the style context tree.
   */
  virtual nsStyleContext* GetParentStyleContext(nsIFrame** aProviderFrame) const = 0;

  /**
   * Determines whether a frame is visible for painting;
   * taking into account whether it is painting a selection or printing.
   */
  bool IsVisibleForPainting(nsDisplayListBuilder* aBuilder);
  /**
   * Determines whether a frame is visible for painting or collapsed;





  if (!mOutOfFlowFrame) {
    return false;
  }
  // first-letter frames can continue text runs, and placeholders for floated
  // first-letter frames can too
  return mOutOfFlowFrame->CanContinueTextRun();
}

nsStyleContext*
nsPlaceholderFrame::GetParentStyleContext(nsIFrame** aProviderFrame) const
{
  NS_PRECONDITION(GetParent(), "How can we not have a parent here?");

  nsIContent* parentContent = mContent ? mContent->GetParent() : nullptr;
  if (parentContent) {
    nsStyleContext* sc =
      PresContext()->FrameManager()->GetDisplayBoxContentsStyleFor(parentContent);
    if (sc) {
      *aProviderFrame = nullptr;
      return sc;
    }
  }

  // Lie about our pseudo so we can step out of all anon boxes and
  // pseudo-elements.  The other option would be to reimplement the
  // {ib} split gunk here.
  *aProviderFrame = CorrectStyleParentFrame(GetParent(), nsGkAtoms::placeholderFrame);
  return *aProviderFrame ? (*aProviderFrame)->StyleContext() : nullptr;
}


#ifdef DEBUG
static void
PaintDebugPlaceholder(nsIFrame* aFrame, nsRenderingContext* aCtx,
                      const nsRect& aDirtyRect, nsPoint aPt)
{





  virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE
  {
    nsIFrame* realFrame = GetRealFrameForPlaceholder(this);
    return realFrame ? realFrame->AccessibleType() :
                       nsFrame::AccessibleType();
  }
#endif

  virtual nsStyleContext* GetParentStyleContext(nsIFrame** aProviderFrame) const MOZ_OVERRIDE;

  /**
   * @return the out-of-flow for aFrame if aFrame is a placeholder; otherwise
   * aFrame
   */
  static nsIFrame* GetRealFrameFor(nsIFrame* aFrame) {
    NS_PRECONDITION(aFrame, "Must have a frame to work with");
    if (aFrame->GetType() == nsGkAtoms::placeholderFrame) {

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE HTML>
+<html>
+<head>
+<style>
+body > div { border:1px solid black; margin:1em;
+             font-family:sans-serif; letter-spacing:2px; }
+</style>
+</head>
+<body>
+  <div><span>Hello</span> <span>Kitty</span></div>
+  <div><span>Hello</span> <span>Kitty</span></div>
+  <div><span>Hello</span> <span>Kitty</span></div>
+  <div><span>Hello</span> <span>Kitty</span></div>
+  <div><span>Hello</span> <span>Kitty</span></div>
+  <div><span>Hello</span> <span>Kitty</span></div>
+  <div><span>Hello</span> <span>Kitty</span></div>
+  <div><span>Hello</span> <span>Kitty</span></div>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE HTML>
+<html>
+<head>
+<!-- Test that before/after generated content stops suppression correctly,
+     both statically and dynamically -->
+<style>
+body > div { border:1px solid black; margin:1em;
+             font-family:sans-serif; letter-spacing:2px; }
+#d1:before { content:"Hello"; }
+#d2:after { content:"Kitty"; }
+#d3.c:before { content:"Hello"; }
+#d4.c:after { content:"Kitty"; }
+#d5.c:before { content:"Hello"; }
+#d6.c:after { content:"Kitty"; }
+#d7.c:after { content:"Kitty"; }
+#d8.c:before { content:"Hello"; }
+#d5,#d6 { overflow:hidden; }
+#d1,#d2,#d3,#d4 { display-box:contents; }
+x { display:table; }
+y { display:table-outer; }
+</style>
+<script>
+function loaded() {
+  document.body.offsetHeight;
+  document.getElementById("d3").setAttribute("class", "c");
+  document.getElementById("d4").setAttribute("class", "c");
+  document.getElementById("d5").setAttribute("class", "c");
+  document.getElementById("d6").setAttribute("class", "c");
+  document.getElementById("d7").setAttribute("class", "c");
+  document.getElementById("d8").setAttribute("class", "c");
+}
+</script>
+</head>
+<body onload="loaded()">
+  <div><div id="d1"> <span>Kitty</span></div></div>
+  <div><div id="d2"><span>Hello</span> </div></div>
+  <div><div id="d3"> <span>Kitty</span></div></div>
+  <div><div id="d4"><span>Hello</span> </div></div>
+  <div><div id="d5"> <span>Kitty</span></div></div>
+  <div><div id="d6"><span>Hello</span> </div></div>
+  <div><x id="d7"><span>Hello</span> </div></x>
+  <div><x id="d8"> <span>Kitty</span> </div></x>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE html>
+<html lang="en-US">
+<head>
+  <meta charset="UTF-8">
+  <title>CSS Test: CSS display-box:contents</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+  <link rel="help" href="http://dev.w3.org/csswg/css-display">
+<style type="text/css">
+        html,body {
+            color:black; background-color:white; height:100%; font-size:16px; padding:0; margin:0;
+        }
+iframe { padding:0;margin:0;border-width:0;width:100%;height:90%; color:red; }
+    </style>
+<script>
+function runTest(iframe) {
+  var win = iframe.contentWindow;
+  var doc = iframe.contentDocument;
+  doc.body.offsetHeight
+  var e = doc.querySelectorAll('*');
+  var contents = new Array;
+  for (i=0; i < e.length; ++i) {
+    var elm = e[i];
+    if (win.getComputedStyle(elm).displayBox == 'contents') {
+      contents.push(elm);
+      elm.style.displayBox='none';
+    }
+  }
+  doc.body.offsetHeight;
+  for (i=0; i < contents.length; ++i) {
+    elm = contents[i];
+    elm.style.displayBox='contents';
+  }
+  doc.body.offsetHeight;
+}
+</script>
+</head>
+<body>
+<iframe src="display-box-contents-acid.html" frameborder=0 onload="runTest(this)"></iframe>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE html>
+<html lang="en-US">
+<head>
+  <meta charset="UTF-8">
+  <title>CSS Test: CSS display-box:contents</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+  <link rel="help" href="http://dev.w3.org/csswg/css-display">
+<style type="text/css">
+        html,body {
+            color:black; background-color:white; height:100%; font-size:16px; padding:0; margin:0;
+        }
+iframe { padding:0;margin:0;border-width:0;width:100%;height:90%; color:red; }
+    </style>
+<script>
+function runTest(iframe) {
+  var win = iframe.contentWindow;
+  var doc = iframe.contentDocument;
+  doc.body.offsetHeight
+  var e = doc.querySelectorAll('*');
+  var contents = new Array;
+  for (i=0; i < e.length; ++i) {
+    var elm = e[i];
+    if (win.getComputedStyle(elm).displayBox == 'contents') {
+      contents.push(elm);
+      elm.style.displayBox='inline';
+    }
+  }
+  doc.body.offsetHeight;
+  for (i=0; i < contents.length; ++i) {
+    elm = contents[i];
+    elm.style.displayBox='contents';
+  }
+  doc.body.offsetHeight;
+}
+</script>
+</head>
+<body>
+<iframe src="display-box-contents-acid.html" frameborder=0 onload="runTest(this)"></iframe>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE html>
+<html lang="en-US">
+<head>
+  <meta charset="UTF-8">
+  <title>CSS Test: CSS display-box:contents</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+  <link rel="help" href="http://dev.w3.org/csswg/css-display">
+<style type="text/css">
+        html,body {
+            color:black; background-color:white; height:100%; font-size:16px; padding:0; margin:0;
+        }
+iframe { padding:0;margin:0;border-width:0;width:100%;height:90%; color:red; }
+    </style>
+<script>
+function runTest(iframe) {
+  var win = iframe.contentWindow;
+  var doc = iframe.contentDocument;
+  doc.body.offsetHeight
+  var e = doc.querySelectorAll('*');
+  var contents = new Array;
+  for (i=0; i < e.length; ++i) {
+    var elm = e[i];
+    if (win.getComputedStyle(elm).displayBox == 'contents') {
+      contents.push([ elm, elm.nextSibling, elm.parentNode ]);
+      elm.parentNode.removeChild(elm);
+    }
+  }
+  doc.body.offsetHeight;
+  var i = contents.length;
+  while(i--) {
+    var arr = contents[i];
+    arr[2].insertBefore(arr[0], arr[1]);
+  }
+  doc.body.offsetHeight;
+}
+</script>
+</head>
+<body>
+<iframe src="display-box-contents-acid.html" frameborder=0 onload="runTest(this)"></iframe>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE html>
+<html lang="en-US">
+<head>
+  <meta charset="UTF-8">
+  <title>CSS Test: CSS display-box:contents</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+<style type="text/css">
+        html,body {
+            color:black; background-color:white; font-size:16px; padding:0; margin:0;
+        }
+.table   { display:table; border-collapse:collapse; border: blue solid 1pt;}
+.itable  { display:inline-table; }
+.caption { display:table-caption; }
+.cell    { display:table-cell; border:inherit; }
+.row     { display:table-row; border: green dashed 1pt; }
+.rowg    { display:table-row-group; }
+.head    { display:table-header-group; }
+.foot    { display:table-footer-group; }
+.col     { display:table-column; }
+.colg    { display:table-column-group; }
+.flex    { display:flex; }
+.iflex   { display:inline-flex; }
+.li      { display:list-item; }
+.ib      { display:inline-block; }
+.inline  { display:inline; }
+.columns  { -moz-columns:2; columns:2; height:4em; }
+.c1 { color:lime; }
+.c2 { color:pink; }
+.c3 { color:teal; }
+.c4 { color:green; }
+.c5 { color:silver; }
+.c6 { color:cyan; }
+.c7 { color:magenta; }
+.c8 { color:yellow; }
+.c9 { color:grey; }
+.c10{ color:black; }
+.b { background:blue; }
+    </style>
+</head>
+<body style="color:red">
+<div class="caption c2">1<span>1</span></div>
+<div class="row c2">2a<div class="cell">2<div class="inline c2">b<span class="b">b</span></div></div></div>
+<div class="cell c3">3</div>
+<div class="rowg c4">4</div>
+<div class="cell c5">5a</div>
+<div class="cell c5">5b</div>
+<div class="head c6">6</div>
+<div class="cell c7"><div class="inline c2">7<span class="b">a</span></div></div>
+<div class="cell c8">7b</div>
+<div class="foot c9">8</div>
+<div class="foot c9">9<div class="inline c2">a<span class="b">b</span>c</div></div>
+<div class="cell c10">10</div>
+<div class="table" style="float:right">
+<div class="caption c2">1<span>1</span></div>
+<div class="row c2">2a<div class="cell">2<div class="inline c2">b<span class="b">b</span></div></div></div>
+<div class="cell c3" style="border:none">3</div>
+<div class="rowg c4">4</div>
+<div class="cell c5" style="border:none">5a</div>
+<div class="cell c5">5b</div>
+<div class="head c6">6</div>
+<div class="cell c7" style="border:none"><div class="inline c2">7<span class="b">a</span></div></div>
+<div class="cell c8" style="border:none">7b</div>
+<div class="foot c9" style="border:none">8</div>
+<div class="foot c9">9<div class="inline c2">a<span class="b">b</span>c</div></div>
+<div class="cell c10" style="border:none">10</div>
+</div>
+<div class="flex c1">
+&nbsp;
+<div class="inline c1">x&nbsp;</div>
+<div class="inline c1"><div class="inline c2">y</div></div>
+<div class="inline c1"><div class="inline c2"><div class="">1<span>1</span></div></div></div>
+<div class="inline c2"><div class="inline">2a<div class="">2<div class="inline c2">b<span class="b">b</span></div></div></div></div>
+<div class="c3">3</div>
+<div class="inline"><div class="inline c4">4</div></div>
+<div class=""><div class="inline c5">5a</div></div>
+<div class=" c5">5b</div>
+<div class="inline c6"><div class="">6</div></div>
+<div class="ib"><div class="inline c7"><div class="inline c2">7<span class="b">a</span></div></div></div>
+<div class="inline c9"><div class="">8</div></div>
+<div class="inline c9"><div class="inline">9<div class="inline c2">a</div></div></div>
+<span class="c2 b">b</span>
+<div class="inline c2">c</div>
+<div class="inline c10"><div class="">10</div></div>
+</div>
+<div class="flex c1">
+<div class="inline c2">0&nbsp;</div>
+<div class="inline c1">x&nbsp;</div>
+<div class="inline c1"><div class="inline c2">y</div></div>
+<div class="inline c1"><div class="inline c2"><div class="">1<span>1</span></div></div></div>
+<div class="c2"><div class="inline">2a<div>2<div class="inline c2">b<span class="b">b</span></div></div></div></div>
+<div class="c3">3</div>
+<div class="inline"><div class="inline c4">4</div></div>
+<div class=""><div class="inline c5">5a</div></div>
+<div class=" c5">5b</div>
+<div class="inline c6"><div class="">6</div></div>
+<div class="ib"><div class="inline c7"><div class="inline c2">7<span class="b">a</span></div></div></div>
+<div class="inline c9"><div class="">8</div></div>
+<div class="inline c9"><div class="inline">9<div class="inline c2">a</div></div></div>
+<span class="c2 b">b</span>
+<div class="inline c2">c</div>
+<div class="inline c10"><div class="">10</div></div>
+</div>
+<div class="iflex"><div class="contents c2">
+</div></div>
+<div class="iflex"><div class="contents c2">
+<div class="inline c1">1</div>
+</div></div>
+<div class="iflex"><div class="contents c2">
+<div class="inline c1">1</div>2
+</div></div>
+<div class="iflex c3">
+<div class="inline c2"><div class="c1">1</div></div>2
+</div>
+<div class="iflex c3">
+<div class="inline c2">0</div><div class="inline c2"><div class="c1">1</div></div><div class="inline c2">2</div>
+</div>
+<div class="iflex c3">
+<div class="inline">0</div>
+<div class="inline"><div class="inline c1">1</div></div>
+<div class="inline">2</div>
+</div>
+<ul><li class="c1"><div class="inline c2">
+<div class="inline c1">x</div>
+<div class="inline c1"><div class="inline c2">y</div></div>
+<div class="inline c1"><div class="inline c2"><div class="">1<span>1</span></div></div></div>
+<div class="inline c2"><div class="inline">2a<div class="">2<div class="inline c2">b<span class="b">b</span></div></div></div></div>
+<div class="inline c3"><div class="inline">3</div></div>
+<div class="inline"><div class="inline c4">4</div></div>
+<div class=""><div class="inline c5">5a</div></div>
+<div class=" c5">5b</div>
+<div class="inline c6"><div class="">6</div></div>
+<div class="ib"><div class="inline c7"><div class="inline c2">7<span class="b">a</span></div></div></div>
+<div class="inline c9"><div class="">8</div></div>
+<div class="inline c9"><div class="inline">9<div class="inline c2">a<span class="b">b</span>c</div></div></div>
+<div class="inline c10"><div class="">10</div></div>
+</div></li>
+</ul>
+<div class="columns">
+<div class="contents c1"><div class="contents c2"><div>1<span>1</span></div></div></div>
+<div class="contents c2"><div>2</div></div>
+<div class="contents c3"><div>3</div></div>
+</div>
+<div class="columns">
+<div class="contents c1"><div class="contents c2"><div>1<span>1</span></div></div></div>
+<div class="contents c2"><div>2</div></div>
+<div class="contents c3"><div>3</div></div>
+</div>
+<span class="c2 b"><legend class="inline c1">Legend</legend><legend class="inline c1">Legend</legend></span>
+<br clear="all">
+<span class="c3">x<div class="inline c1">float:left</div></span>
+<span class="c3">y<div class="inline c1">position:absolute</div></span>
+<!--  -->
+<fieldset class="c1"><legend>Legend</legend>fieldset</fieldset>
+<button class="c1">but<span>ton</span></button>
+<select class="c1"><option>select</select>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE html>
+<html lang="en-US">
+<head>
+  <meta charset="UTF-8">
+  <title>CSS Test: CSS display-box:contents</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+  <link rel="help" href="http://dev.w3.org/csswg/css-display">
+<style type="text/css">
+        html,body {
+            color:black; background-color:white; font-size:16px; padding:0; margin:0;
+        }
+.table   { display:table; border-collapse:collapse; border: blue solid 1pt;}
+.itable  { display:inline-table; }
+.caption { display:table-caption; }
+.cell    { display:table-cell; border:inherit; }
+.row     { display:table-row; border: green dashed 1pt; }
+.rowg    { display:table-row-group; }
+.head    { display:table-header-group; }
+.foot    { display:table-footer-group; }
+.col     { display:table-column; }
+.colg    { display:table-column-group; }
+.flex    { display:flex; }
+.iflex   { display:inline-flex; }
+.li      { display:list-item; }
+.ib      { display:inline-block; }
+.inline  { display:inline; }
+.columns  { -moz-columns:2; columns:2; height:4em; }
+.contents { display-box:contents; }
+.c1 { color:lime; }
+.c2 { background:blue; color:pink; }
+.c3 { color:teal; }
+.c4 { color:green; }
+.c5 { color:silver; }
+.c6 { color:cyan; }
+.c7 { color:magenta; }
+.c8 { color:yellow; }
+.c9 { color:grey; }
+.c10{ color:black; }
+.b { background:inherit; }
+    </style>
+</head>
+<body style="color:red">
+<div class="contents c1"><div class="contents c2"><div class="caption">1<span class="b">1</span></div></div></div>
+<div class="contents c2"><div class="row">2a<div class="cell">2<div class="contents c2">b<span class="b">b</span></div></div></div></div>
+<div class="contents c3"><div class="cell">3</div></div>
+<div class="contents c4"><div class="rowg">4</div></div>
+<div class="contents c5"><div class="cell">5a</div></div>
+<div class="cell c5">5b</div>
+<div class="contents c6"><div class="head">6</div></div>
+<div class="contents c7"><div class="cell"><div class="contents c2">7<span class="b">a</span></div></div></div>
+<div class="contents c8"><div class="cell">7b</div></div>
+<div class="contents c9"><div class="foot">8</div></div>
+<div class="contents c9"><div class="foot">9<div class="contents c2">a<span class="b">b</span>c</div></div></div>
+<div class="contents c10"><div class="cell">10</div></div>
+<div class="table" style="float:right">
+<div class="contents c1"><div class="contents c2"><div class="caption">1<span class="b">1</span></div></div></div>
+<div class="contents c2"><div class="row">2a<div class="cell">2<div class="contents c2">b<span class="b">b</span></div></div></div></div>
+<div class="contents c3"><div class="cell">3</div></div>
+<div class="contents c4"><div class="rowg">4</div></div>
+<div class="contents c5"><div class="cell">5a</div></div>
+<div class="cell c5">5b</div>
+<div class="contents c6"><div class="head">6</div></div>
+<div class="contents c7"><div class="cell"><div class="contents c2">7<span class="b">a</span></div></div></div>
+<div class="contents c8"><div class="cell">7b</div></div>
+<div class="contents c9"><div class="foot">8</div></div>
+<div class="contents c9"><div class="foot">9<div class="contents c2">a<span class="b">b</span>c</div></div></div>
+<div class="contents c10"><div class="cell">10</div></div>
+</div>
+<div class="flex c1">
+<div class="contents c1">x</div>
+<div class="contents c1"><div class="contents c2">y</div></div>
+<div class="contents c1"><div class="contents c2"><div class="">1<span class="b">1</span></div></div></div>
+<div class="contents c2"><div class="inline">2a<div class="">2<div class="contents c2">b<span class="b">b</span></div></div></div></div>
+<div class="contents c3"><div class="inline">3</div></div>
+<div class="inline"><div class="contents c4">4</div></div>
+<div class=""><div class="contents c5">5a</div></div>
+<div class=" c5">5b</div>
+<div class="contents c6"><div class="">6</div></div>
+<div class="ib"><div class="contents c7"><div class="contents c2">7<span class="b">a</span></div></div></div>
+<div class="contents c9"><div class="">8</div></div>
+<div class="contents c9"><div class="contents">9<div class="contents c2">a<span class="b">b</span>c</div></div></div>
+<div class="contents c10"><div class="">10</div></div>
+</div>
+<div class="flex"><div class="contents c2">
+<div class="contents c1">x</div>
+<div class="contents c1"><div class="contents c2">y</div></div>
+<div class="contents c1"><div class="contents c2"><div class="">1<span class="b">1</span></div></div></div>
+<div class="contents c2"><div class="inline">2a<div class="">2<div class="contents c2">b<span class="b">b</span></div></div></div></div>
+<div class="contents c3"><div class="inline">3</div></div>
+<div class=""><div class="contents c4">4</div></div>
+<div class=""><div class="contents c5">5a</div></div>
+<div class=" c5">5b</div>
+<div class="contents c6"><div class="">6</div></div>
+<div class="ib"><div class="contents c7"><div class="contents c2">7<span class="b">a</span></div></div></div>
+<div class="contents c9"><div class="">8</div></div>
+<div class="contents c9"><div class="contents">9<div class="contents c2">a<span class="b">b</span>c</div></div></div>
+<div class="contents c10"><div class="">10</div></div>
+</div></div>
+<div class="iflex"><div class="contents c2">
+</div></div>
+<div class="iflex"><div class="contents c2">
+<div class="contents c1">1</div>
+</div></div>
+<div class="iflex"><div class="contents c2">
+<div class="c1">1</div>
+</div></div>
+<div class="iflex c3">
+<div class="contents c2"><div class="c1">1</div></div>
+</div>
+<div class="iflex c3">
+<div class="contents c2">0</div>
+<div class="contents c2"><div class="c1">1</div></div>
+<div class="contents c2">2</div>
+</div>
+<div class="iflex c3">
+<div class="inline">0</div>
+<div class="contents"><div class="inline c1">1</div></div>
+<div class="inline">2</div>
+</div>
+<ul><li class="c1"><div class="contents c2">
+<div class="contents c1">x</div>
+<div class="contents c1"><div class="contents c2">y</div></div>
+<div class="contents c1"><div class="contents c2"><div class="">1<span class="b">1</span></div></div></div>
+<div class="contents c2"><div class="inline">2a<div class="">2<div class="contents c2">b<span class="b">b</span></div></div></div></div>
+<div class="contents c3"><div class="inline">3</div></div>
+<div class="inline"><div class="contents c4">4</div></div>
+<div class=""><div class="contents c5">5a</div></div>
+<div class=" c5">5b</div>
+<div class="contents c6"><div class="">6</div></div>
+<div class="ib"><div class="contents c7"><div class="contents c2">7<span class="b">a</span></div></div></div>
+<div class="contents c9"><div class="">8</div></div>
+<div class="contents c9"><div class="contents">9<div class="contents c2">a<span class="b">b</span>c</div></div></div>
+<div class="contents c10"><div class="">10</div></div>
+</div></li>
+</ul>
+<div class="columns">
+<div class="contents c1"><div class="contents c2"><div>1<span class="b">1</span></div></div></div>
+<div class="contents c2"><div>2</div></div>
+<div class="contents c3"><div>3</div></div>
+</div>
+<div class="columns">
+<div class="columns contents">
+<div class="contents c1"><div class="contents c2"><div>1<span class="b">1</span></div></div></div>
+<div class="contents c2"><div>2</div></div>
+<div class="contents c3"><div>3</div></div>
+</div>
+</div>
+<div class="contents c3"><!-- comment node --></div>
+<div class="contents c3"><?PI ?></div>
+<span class="c2"><legend class="contents c1">Legend</legend><legend class="contents c1">Legend</legend></span>
+<br clear="all">
+<span class="c3">x<div class="contents c1" style="float:left">float:left</div></span>
+<span class="c3">y<div class="contents c1" style="position:absolute">position:absolute</div></span>
+<!-- Stuff below should simply ignore having display-box:contents -->
+<fieldset class="contents c1"><legend class="contents">Legend</legend>fieldset</fieldset>
+<button class="contents c1">but<span>ton</span></button>
+<select class="contents c1"><option>select</select>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE html>
+<html lang="en-US" class="reftest-wait">
+<head>
+  <meta charset="UTF-8">
+  <title>CSS Test: CSS display-box:contents; generated content</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+  <link rel="help" href="http://dev.w3.org/csswg/css-display">
+<style type="text/css">
+body,html { color:black; background-color:white; }
+div { display:inline; }
+.test {
+  display-box: contents;
+  content: "content";
+  color: lime;
+}
+.contents {
+  display-box: contents;
+  color: green;
+}
+.s1 {display: none;}
+.s2 {display: none;}
+.s3 {display-box: contents;}
+.s5 {display-box: contents;}
+.s7 {display: none;}
+.s8 {display: none;}
+.s9 {display-box: contents;}
+.s11 {display-box: contents;}
+.before::before {
+  display-box: contents;
+  content:"before";
+}
+.after::after {
+  display-box: contents;
+  content:"after";
+}
+</style>
+<script>
+function setup() {
+  document.body.offsetHeight;
+  document.querySelector('.t1').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.t2').style.display = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.t3').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.t4').style.displayBox = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.t5').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.t6').style.display = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.t7').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.t8').style.displayBox = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.t9').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.t10').style.display = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.t11').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.t12').style.displayBox = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.t13').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.s1').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.s2').style.display = 'inline';
+  document.body.offsetHeight;
+  document.querySelector('.s3').style.displayBox = 'normal';
+  document.body.offsetHeight;
+  document.querySelector('.s4').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.s5').style.display = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.s6').style.displayBox = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.s7').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.s8').style.display = 'inline';
+  document.body.offsetHeight;
+  document.querySelector('.s9').style.displayBox = 'normal';
+  document.body.offsetHeight;
+  document.querySelector('.s10').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.s11').style.display = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.s12').style.displayBox = 'none';
+  document.body.offsetHeight;
+}
+function runTest() {
+  var doc = document;
+  var win = window;
+  setup();
+  var e = doc.querySelectorAll('*');
+  for (i=0; i < e.length; ++i) {
+    var elm = e[i];
+    if (win.getComputedStyle(elm).displayBox == 'contents') {
+      var c = elm.childNodes[0];
+      if (c) {
+        var next = c.nextSibling;
+        elm.removeChild(c);
+        elm.insertBefore(c,next);
+      }
+      var c = elm.childNodes[1];
+      if (c) {
+        var next = c.nextSibling;
+        elm.removeChild(c);
+        elm.insertBefore(c,next);
+      }
+      var c = elm.childNodes.length ? elm.childNodes[elm.childNodes.length-1] : null;
+      if (c) {
+        elm.removeChild(c);
+        elm.appendChild(c);
+      }
+    }
+  }
+  document.documentElement.className = '';
+}
+</script>
+</head>
+<body onload="runTest()">
+<div class="test"><span>A a</span></div>
+<div class="test"><span class="t1">t1</span></div>
+<div class="test"><span class="t2">t2</span></div>
+<div class="contents before">1<span>B b</span>2</div>
+<div class="contents after">1<span>C c</span>2</div>
+<div class="contents before after">1<span>D d</span>2</div>
+<div class="contents before">1<span class="t5">B b</span>2</div>
+<div class="contents after">1<span class="t6">C c</span>2</div>
+<div class="contents before after">1<span class="t7">D d</span>2</div>
+<div class="contents">
+  <div class="test"><span>span</span></div>
+  <div class="test"><span class="t3">t3</span></div>
+  <div class="test"><span class="t4">t4</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+  <div class="contents before">1<span class="t8">span</span>2</div>
+  <div class="contents after">1<span class="t9">span</span>2</div>
+  <div class="contents before after">1<span class="t10">span</span>2</div>
+  <div class="contents before">1<span class="t11">span</span>2</div>
+  <div class="contents after">1<span class="t12">span</span>2</div>
+  <div class="contents before after">1<span class="t13">span</span>2</div>
+</div>
+<div class="contents"><span class="s1">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s2">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s3">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s4">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s5">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s6">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents before"><span class="s7">
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents after"><span class="s8">
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s9">
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents before after"><span class="s10">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents before"><span class="s11">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents after"><span class="s12">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE html>
+<html lang="en-US">
+<head>
+  <meta charset="UTF-8">
+  <title>CSS Test: CSS display-box:contents; generated content</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+  <link rel="help" href="http://dev.w3.org/csswg/css-display">
+<style type="text/css">
+body,html { color:black; background-color:white; }
+.test {
+  display: inline;
+  content: "content";
+  color: lime;
+}
+.contents {
+  display: inline;
+  color: green;
+}
+.before::before {
+  display: inline;
+  content:"before";
+}
+.after::after {
+  display: inline;
+  content:"after";
+}
+</style>
+</head>
+<body>
+<div class="test"><span>A a</span></div>
+<div class="test"><span class="contents">t1</span></div>
+<div class="test"></div>
+<div class="contents before">1<span>B b</span>2</div>
+<div class="contents after">1<span>C c</span>2</div>
+<div class="contents before after">1<span>D d</span>2</div>
+<div class="contents before">1<span class="t5">B b</span>2</div>
+<div class="contents after">12</div>
+<div class="contents before after">1<span class="t7">D d</span>2</div>
+<div class="contents">
+  <div class="test"><span>span</span></div>
+  <div class="test"><span class="contents">t3</span></div>
+  <div class="test"></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+  <div class="contents before">12</div>
+  <div class="contents after">1<span class="t9">span</span>2</div>
+  <div class="contents before after">12</div>
+  <div class="contents before">1<span class="t11">span</span>2</div>
+  <div class="contents after">12</div>
+  <div class="contents before after">1<span class="t13">span</span>2</div>
+</div>
+<div class="contents"><span class="s1">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s2">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s3">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s4">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"></div>
+<div class="contents"></div>
+<div class="contents before"><span class="s7">
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents after"><span class="s8">
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s9">
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents before after"><span class="s10">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents before"></div>
+<div class="contents after"></div>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE html>
+<html lang="en-US" class="reftest-wait">
+<head>
+  <meta charset="UTF-8">
+  <title>CSS Test: CSS display-box:contents; generated content</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+  <link rel="help" href="http://dev.w3.org/csswg/css-display">
+<style type="text/css">
+body,html { color:black; background-color:white; }
+div { display:inline; }
+.test {
+  display-box: contents;
+  content: "content";
+  color: lime;
+}
+.contents {
+  display-box: contents;
+  color: green;
+}
+.s1 {display: none;}
+.s2 {display: none;}
+.s3 {display-box: contents;}
+.s5 {display-box: contents;}
+.s7 {display: none;}
+.s8 {display: none;}
+.s9 {display-box: contents;}
+.s11 {display-box: contents;}
+.before::before {
+  display-box: contents;
+  content:"before";
+}
+.after::after {
+  display-box: contents;
+  content:"after";
+}
+</style>
+<script>
+function runTest() {
+  document.body.offsetHeight;
+  document.querySelector('.t1').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.t2').style.display = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.t3').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.t4').style.displayBox = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.t5').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.t6').style.display = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.t7').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.t8').style.displayBox = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.t9').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.t10').style.display = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.t11').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.t12').style.displayBox = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.t13').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.s1').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.s2').style.display = 'inline';
+  document.body.offsetHeight;
+  document.querySelector('.s3').style.displayBox = 'normal';
+  document.body.offsetHeight;
+  document.querySelector('.s4').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.s5').style.display = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.s6').style.displayBox = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.s7').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.s8').style.display = 'inline';
+  document.body.offsetHeight;
+  document.querySelector('.s9').style.displayBox = 'normal';
+  document.body.offsetHeight;
+  document.querySelector('.s10').className = 'contents';
+  document.body.offsetHeight;
+  document.querySelector('.s11').style.display = 'none';
+  document.body.offsetHeight;
+  document.querySelector('.s12').style.displayBox = 'none';
+  document.body.offsetHeight;
+  document.documentElement.className = '';
+}
+</script>
+</head>
+<body onload="runTest()">
+<div class="test"><span>A a</span></div>
+<div class="test"><span class="t1">t1</span></div>
+<div class="test"><span class="t2">t2</span></div>
+<div class="contents before">1<span>B b</span>2</div>
+<div class="contents after">1<span>C c</span>2</div>
+<div class="contents before after">1<span>D d</span>2</div>
+<div class="contents before">1<span class="t5">B b</span>2</div>
+<div class="contents after">1<span class="t6">C c</span>2</div>
+<div class="contents before after">1<span class="t7">D d</span>2</div>
+<div class="contents">
+  <div class="test"><span>span</span></div>
+  <div class="test"><span class="t3">t3</span></div>
+  <div class="test"><span class="t4">t4</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+  <div class="contents before">1<span class="t8">span</span>2</div>
+  <div class="contents after">1<span class="t9">span</span>2</div>
+  <div class="contents before after">1<span class="t10">span</span>2</div>
+  <div class="contents before">1<span class="t11">span</span>2</div>
+  <div class="contents after">1<span class="t12">span</span>2</div>
+  <div class="contents before after">1<span class="t13">span</span>2</div>
+</div>
+<div class="contents"><span class="s1">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s2">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s3">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s4">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s5">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s6">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents before"><span class="s7">
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents after"><span class="s8">
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents"><span class="s9">
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents before after"><span class="s10">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents before"><span class="s11">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+<div class="contents after"><span class="s12">
+  <div class="test"><span>span</span></div>
+  <div class="contents before">1<span>span</span>2</div>
+  <div class="contents after">1<span>span</span>2</div>
+  <div class="contents before after">1<span>span</span>2</div>
+</span></div>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE html>
+<html lang="en-US" class="reftest-wait">
+<head>
+  <meta charset="utf-8">
+  <title>CSS Test: CSS display-box:contents; style inheritance, DOM mutations</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+  <link rel="help" href="http://dev.w3.org/csswg/css-display">
+<style type="text/css">
+body,span { color:black; background-color:white; }
+.test { display-box:contents; }
+.green { color:green; }
+.border { border-left:1px solid green; }
+b { border:inherit; font-weight:normal; }
+</style>
+<script>
+function $(id) { return document.getElementById(id); }
+function text(s) { return document.createTextNode(s); }
+function b(s) { var e = document.createElement('b'); e.appendChild(document.createTextNode(s)); return e; }
+function div(s) { var e = document.createElement('div'); e.setAttribute('class','test'); e.appendChild(document.createTextNode(s)); return e; }
+function runTest() {
+  var e = $('t1');
+  var c = e.firstChild;
+  e.insertBefore(text('g'), c);
+  e.insertBefore(text('r'), c);
+  e.appendChild(text('n'));
+  var e = $('t1b');
+  var c = e.firstChild;
+  e.insertBefore(text('g'), c);
+  e.insertBefore(text('r'), c);
+  e.appendChild(text('n'));
+  var e = $('t2');
+  var c = e.firstChild;
+  e.insertBefore(text('gr'), c);
+  e.appendChild(text('n'));
+  var e = $('t2b');
+  var c = e.firstChild;
+  e.insertBefore(text('gr'), c);
+  e.appendChild(text('n'));
+  var e = $('t3');
+  var c = e.firstChild;
+  e.insertBefore(text('n'), c);
+  e.insertBefore(text('o'), c);
+  e.appendChild(text('er'));
+  var e = $('t4');
+  var c = e.firstChild;
+  e.insertBefore(text('n'), c);
+  e.insertBefore(text('o'), c);
+  e.appendChild(text('er'));
+  var e = $('t5');
+  var c = e.firstChild;
+  e.insertBefore(b('1px green left '), c);
+  e.appendChild(text('er'));
+  var e = $('t6');
+  e.appendChild(b('2px green left border'));
+  var e = $('t7');
+  e.appendChild(div('green'));
+  var e = $('t8');
+  e.appendChild(div('green'));
+  var e = $('t9');
+  var c = b("1px green left border");
+  var d = div('');
+  d.appendChild(c);
+  e.appendChild(d);
+  var e = $('t10');
+  var c = b("1px green left border");
+  var d = div('');
+  d.setAttribute('style','border:inherit');
+  d.appendChild(c);
+  e.appendChild(d);
+  var e = $('t11');
+  var c = b("2px green left border");
+  var d = div('');
+  d.setAttribute('style','border:inherit');
+  d.appendChild(c);
+  e.appendChild(d);
+  var e = $('t12');
+  var c = e.firstChild;
+  e.insertBefore(text("This text"), c);
+  e.insertBefore(b(" should be"), c);
+  e.appendChild(text(" green"));
+  document.documentElement.className = '';
+}
+</script>
+</head>
+<body onload="runTest()">
+<span class="green"><div class="test" id="t1">ee</div></span>
+<span class="green"><div class="test" id="t1b">ee</div>x</span>
+<span><div class="test green" id="t2">ee</div></span>
+<span><div class="test green" id="t2b">ee</div>x</span>
+<br>
+<span><div class="test border" id="t3"> bord</div></span>
+<span><div class="test border" id="t4"><span> bord</span></div></span>
+<span class="border"><div class="test" id="t5">bord</div></span>
+<span class="border"><div class="test" style="border:inherit" id="t6"></div></span>
+<br>
+<span class="green"><div class="test" id="t7"></div></span>
+<span><div class="test green" id="t8"></div></span>
+<br>
+<span class="border"><div class="test" id="t9"></div></span>
+<span class="border"><div class="test" id="t10"></div></span>
+<span class="border"><div class="test" style="border:inherit" id="t11"></div></span>
+<br>
+<span style="color:red"><div class="test green" id="t12"></div></span>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE html>
+<html lang="en-US">
+<head>
+  <meta charset="utf-8">
+  <title>CSS Test: CSS display-box:contents; style inheritance</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+<style type="text/css">
+body,span { color:black; background-color:white; }
+.test { display:inline; }
+.green { color:green; }
+.border { border-left:1px solid green; }
+b { font-weight:normal; }
+</style>
+</head>
+<body>
+<span class="green"><div class="test">green</div></span>
+<span class="green"><div class="test">green</div>x</span>
+<span><div class="test green">green</div></span>
+<span><div class="test green">green</div>x</span>
+<br>
+<span><div class="test">no border</div></span>
+<span><div class="test">no border</div></span>
+<span class="border"><div class="test"><b>1px green left border</b></div></span>
+<span class="border"><div class="test" style="border:inherit"><b>2px green left border</b></div></span>
+<br>
+<span class="green"><div class="test"><div class="test">green</div></div></span>
+<span><div class="test green"><div class="test">green</div></div></span>
+<br>
+<span class="border"><div class="test"><div class="test"><b>1px green left border</b></div></div></span>
+<span class="border"><div class="test"><div class="test" style="border:inherit"><b>1px green left border</b></div></div></span>
+<span class="border"><div class="test" style="border:inherit"><div class="test"><b>2px green left border</b></div></div></span>
+<br>
+<span><div class="green" id="t12">This text should be green</div></span>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE html>
+<html lang="en-US" class="reftest-wait">
+<head>
+  <meta charset="utf-8">
+  <title>CSS Test: CSS display-box:contents; style inheritance, style changes</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+  <link rel="help" href="http://dev.w3.org/csswg/css-display">
+<style type="text/css">
+body,span { color:black; background-color:white; }
+.test { display-box:contents; border:10px solid black; }
+.test2 { display-box:contents; border-style:none; }
+.test3:not(:lang(foo)) { display-box:contents; color:cyan; }
+.green { color:green; }
+.border { border-left:1px solid green; }
+b { border:inherit; font-weight:normal; }
+</style>
+<script>
+function runTest() {
+  var elms = document.querySelectorAll('.test')
+  for (i=0; i < elms.length; ++i) {
+    elms[i].classList.remove('test');
+    elms[i].classList.add('test2');
+  }
+  document.body.lang = 'foo';
+  document.body.offsetWidth;
+  document.documentElement.className = '';
+}
+</script>
+</head>
+<body onload="setTimeout(runTest,0)">
+<span class="green"><div class="test">green</div></span>
+<span class="green"><div class="test">green</div>x</span>
+<span><div class="test green">green</div></span>
+<span><div class="test green">green</div>x</span>
+<br>
+<span><div class="test border">no border</div></span>
+<span><div class="test border"><span>no border</span></div></span>
+<span class="border"><div class="test"><b>1px green left border</b></div></span>
+<span class="border"><div class="test" style="border:inherit"><b>2px green left border</b></div></span>
+<br>
+<span class="green"><div class="test"><div class="test">green</div></div></span>
+<span><div class="test green"><div class="test">green</div></div></span>
+<br>
+<span class="border"><div class="test"><div class="test"><b>1px green left border</b></div></div></span>
+<span class="border"><div class="test"><div class="test" style="border:inherit"><b>1px green left border</b></div></div></span>
+<span class="border"><div class="test" style="border:inherit"><div class="test" style="border:inherit"><b>2px green left border</b></div></div></span>
+<br>
+<span style="color:red"><div class="test3 green">This text should be green</div></span>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE html>
+<html lang="en-US">
+<head>
+  <meta charset="utf-8">
+  <title>CSS Test: CSS display-box:contents; style inheritance</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+  <link rel="help" href="http://dev.w3.org/csswg/css-display">
+<style type="text/css">
+body,span { color:black; background-color:white; }
+.test { display-box:contents; }
+.green { color:green; }
+.border { border-left:1px solid green; }
+b { border:inherit; font-weight:normal; }
+</style>
+</head>
+<body>
+<span class="green"><div class="test">green</div></span>
+<span class="green"><div class="test">green</div>x</span>
+<span><div class="test green">green</div></span>
+<span><div class="test green">green</div>x</span>
+<br>
+<span><div class="test border">no border</div></span>
+<span><div class="test border"><span>no border</span></div></span>
+<span class="border"><div class="test"><b>1px green left border</b></div></span>
+<span class="border"><div class="test" style="border:inherit"><b>2px green left border</b></div></span>
+<br>
+<span class="green"><div class="test"><div class="test">green</div></div></span>
+<span><div class="test green"><div class="test">green</div></div></span>
+<br>
+<span class="border"><div class="test"><div class="test"><b>1px green left border</b></div></div></span>
+<span class="border"><div class="test"><div class="test" style="border:inherit"><b>1px green left border</b></div></div></span>
+<span class="border"><div class="test" style="border:inherit"><div class="test" style="border:inherit"><b>2px green left border</b></div></div></span>
+<br>
+<span style="color:red"><div class="test green">This text should be green</div></span>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<?xml version="1.0" encoding="UTF-8"?>
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US">
+<head>
+  <title>CSS Test: CSS display-box:contents; tables</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396"/>
+  <link rel="help" href="http://dev.w3.org/csswg/css-display"/>
+<style type="text/css">
+html { color:red; background-color:white; }
+body { color:white; background-color:pink; width:0; }
+.test { display-box:contents; color:white; background-color:lime; }
+td { background-color:inherit; }
+</style>
+</head>
+<body><div class="test"><td>green</td></div><td>pink</td></body></html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<?xml version="1.0" encoding="UTF-8"?>
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US">
+<head>
+  <title>CSS Test: CSS display-box:contents; tables</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396"/>
+<style type="text/css">
+body { color:red; background-color:white; }
+.test { float:left; color:white; background-color:lime; }
+td { background-color:inherit; }
+</style>
+</head>
+<body><div class="test"><td>green</td></div></body></html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<?xml version="1.0" encoding="UTF-8"?>
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US">
+<head>
+  <title>CSS Test: CSS display-box:contents; tables</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396"/>
+  <link rel="help" href="http://dev.w3.org/csswg/css-display"/>
+<style type="text/css">
+body { color:red; background-color:white; }
+.test { display-box:contents; color:white; background-color:lime; }
+td { background-color:inherit; }
+</style>
+</head>
+<body><div class="test"><td>green</td></div></body></html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<?xml version="1.0" encoding="UTF-8"?>
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US">
+<head>
+  <title>CSS Test: CSS display-box:contents; tables</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396"/>
+<style type="text/css">
+body { color:red; background-color:white; }
+td { color:white; background-color:lime; }
+.pink { background-color:pink; }
+</style>
+</head>
+<body><td>green</td><td class="pink">pink</td></body></html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<?xml version="1.0" encoding="UTF-8"?>
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US">
+<head>
+  <title>CSS Test: CSS display-box:contents; tables</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396"/>
+  <link rel="help" href="http://dev.w3.org/csswg/css-display"/>
+<style type="text/css">
+body { color:red; background-color:white; }
+.test { display-box:contents; color:white; background-color:lime; }
+td { background-color:inherit; }
+</style>
+</head>
+<body><div class="test"><td>green</td></div><div class="test" style="background-color:pink"><td>pink</td></div></body></html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE html>
+<html lang="en-US" class="reftest-wait">
+<head>
+  <meta charset="UTF-8">
+  <title>CSS Test: CSS display-box:contents; visibility:hidden</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+  <link rel="help" href="http://dev.w3.org/csswg/css-display">
+</head>
+<body style="color: red">
+  <div id="x" style="display-box:contents; visibility: hidden; color: green">
+    Line 1
+  </div><script type="text/javascript">
+    document.body.offsetWidth;
+    document.getElementById("x").style.visibility = "visible";
+    document.body.offsetWidth;
+    document.documentElement.className = '';
+  </script>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE html>
+<html lang="en-US">
+<head>
+  <meta charset="UTF-8">
+  <title>CSS Test: CSS display-box:contents; visibility:hidden</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+</head>
+<body>
+  <div id="x" style="color:green">
+    Line 1
+  </div>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+<!DOCTYPE html>
+<html lang="en-US" class="reftest-wait">
+<head>
+  <meta charset="UTF-8">
+  <title>CSS Test: CSS display-box:contents; visibility:hidden</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+  <link rel="help" href="http://dev.w3.org/csswg/css-display">
+</head>
+<body>
+  <div id="x" style="display-box:contents; visibility: hidden">
+    Line 1
+  </div><script type="text/javascript">
+    document.body.offsetWidth;
+    document.getElementById("x").style.visibility = "visible";
+    document.body.style.color = "green";
+    document.body.offsetWidth;
+    document.documentElement.className = '';
+  </script>
+</body>
+</html>

-      Line
+  Link Here
-      Line 0
+  Link Here
+# Tests for CSS Display spec features.
+# http://dev.w3.org/csswg/css-display
+pref(layout.css.display-box.enabled,true) == display-box-contents-acid.html display-box-contents-acid-ref.html
+pref(layout.css.display-box.enabled,true) == display-box-contents-acid-dyn-1.html display-box-contents-acid-ref.html
+pref(layout.css.display-box.enabled,true) == display-box-contents-acid-dyn-2.html display-box-contents-acid-ref.html
+pref(layout.css.display-box.enabled,true) == display-box-contents-acid-dyn-3.html display-box-contents-acid-ref.html
+pref(layout.css.display-box.enabled,true) == display-box-contents-generated-content.html display-box-contents-generated-content-ref.html
+pref(layout.css.display-box.enabled,true) == display-box-contents-generated-content-2.html display-box-contents-generated-content-ref.html
+pref(layout.css.display-box.enabled,true) == display-box-contents-style-inheritance-1.html display-box-contents-style-inheritance-1-ref.html
+pref(layout.css.display-box.enabled,true) == display-box-contents-style-inheritance-1-stylechange.html display-box-contents-style-inheritance-1-ref.html
+pref(layout.css.display-box.enabled,true) fuzzy-if(d2d,2,100) == display-box-contents-style-inheritance-1-dom-mutations.html display-box-contents-style-inheritance-1-ref.html
+pref(layout.css.display-box.enabled,true) == display-box-contents-tables.xhtml display-box-contents-tables-ref.xhtml
+pref(layout.css.display-box.enabled,true) == display-box-contents-tables-2.xhtml display-box-contents-tables-ref.xhtml
+pref(layout.css.display-box.enabled,true) == display-box-contents-tables-3.xhtml display-box-contents-tables-3-ref.xhtml
+pref(layout.css.display-box.enabled,true) == display-box-contents-visibility-hidden.html display-box-contents-visibility-hidden-ref.html
+pref(layout.css.display-box.enabled,true) == display-box-contents-visibility-hidden-2.html display-box-contents-visibility-hidden-ref.html
+pref(layout.css.display-box.enabled,true) == display-box-contents-495385-2d.html display-box-contents-495385-2d-ref.html





include css-calc/reftest.list

# css character encoding tests
include css-charset/reftest.list

# css default pseudo class tests
include css-default/reftest.list

# css-display spec tests
include css-display/reftest.list

# css :disable tests
include css-disabled/reftest.list

# css :enable tests
include css-enabled/reftest.list

# css @import tests
include css-import/reftest.list





CSS_KEY(color-burn, color_burn)
CSS_KEY(color-dodge, color_dodge)
CSS_KEY(common-ligatures, common_ligatures)
CSS_KEY(column, column)
CSS_KEY(column-reverse, column_reverse)
CSS_KEY(condensed, condensed)
CSS_KEY(contain, contain)
CSS_KEY(content-box, content_box)
CSS_KEY(contents, contents)
CSS_KEY(context-fill, context_fill)
CSS_KEY(context-fill-opacity, context_fill_opacity)
CSS_KEY(context-menu, context_menu)
CSS_KEY(context-stroke, context_stroke)
CSS_KEY(context-stroke-opacity, context_stroke_opacity)
CSS_KEY(context-value, context_value)
CSS_KEY(continuous, continuous)
CSS_KEY(contrast, contrast)





        // pseudo-element an inline-block in the UA stylesheet. It is a block
        // by default.
        CSS_PROPERTY_APPLIES_TO_PLACEHOLDER,
    "",
    VARIANT_HK,
    kDisplayKTable,
    offsetof(nsStyleDisplay, mDisplay),
    eStyleAnimType_EnumU8)
CSS_PROP_DISPLAY(
    display-box,
    display_box,
    DisplayBox,
    CSS_PROPERTY_PARSE_VALUE,
    "layout.css.display-box.enabled",
    VARIANT_HK,
    kDisplayBoxKTable,
    offsetof(nsStyleDisplay, mDisplayBox),
    eStyleAnimType_EnumU8)
CSS_PROP_TABLEBORDER(
    empty-cells,
    empty_cells,
    EmptyCells,
    CSS_PROPERTY_PARSE_VALUE,
    "",
    VARIANT_HK,
    kEmptyCellsKTable,






const KTableValue nsCSSProps::kBorderWidthKTable[] = {
  eCSSKeyword_thin, NS_STYLE_BORDER_WIDTH_THIN,
  eCSSKeyword_medium, NS_STYLE_BORDER_WIDTH_MEDIUM,
  eCSSKeyword_thick, NS_STYLE_BORDER_WIDTH_THICK,
  eCSSKeyword_UNKNOWN,-1
};

const KTableValue nsCSSProps::kDisplayBoxKTable[] = {
  eCSSKeyword_normal,       NS_STYLE_DISPLAY_BOX_NORMAL,
  eCSSKeyword_none,         NS_STYLE_DISPLAY_BOX_NONE,
  eCSSKeyword_contents,     NS_STYLE_DISPLAY_BOX_CONTENTS,
  eCSSKeyword_UNKNOWN,-1
};

const KTableValue nsCSSProps::kBoxPropSourceKTable[] = {
  eCSSKeyword_physical,     NS_BOXPROP_SOURCE_PHYSICAL,
  eCSSKeyword_logical,      NS_BOXPROP_SOURCE_LOGICAL,
  eCSSKeyword_UNKNOWN,-1
};

const KTableValue nsCSSProps::kBoxDecorationBreakKTable[] = {
  eCSSKeyword_slice, NS_STYLE_BOX_DECORATION_BREAK_SLICE,





  static const KTableValue kStrokeLinecapKTable[];
  static const KTableValue kStrokeLinejoinKTable[];
  static const KTableValue kStrokeContextValueKTable[];
  static const KTableValue kVectorEffectKTable[];
  static const KTableValue kTextAnchorKTable[];
  static const KTableValue kTextRenderingKTable[];
  static const KTableValue kColorInterpolationKTable[];
  static const KTableValue kColumnFillKTable[];
  static const KTableValue kDisplayBoxKTable[];
  static const KTableValue kBoxPropSourceKTable[];
  static const KTableValue kBoxShadowTypeKTable[];
  static const KTableValue kBoxSizingKTable[];
  static const KTableValue kCaptionSideKTable[];
  static const KTableValue kClearKTable[];
  static const KTableValue kColorKTable[];
  static const KTableValue kContentKTable[];
  static const KTableValue kControlCharacterVisibilityKTable[];





  nsROCSSPrimitiveValue *val = new nsROCSSPrimitiveValue;
  val->SetIdent(
    nsCSSProps::ValueToKeywordEnum(StyleUIReset()->mUserSelect,
                                   nsCSSProps::kUserSelectKTable));
  return val;
}

CSSValue*
nsComputedDOMStyle::DoGetDisplayBox()
{
  nsROCSSPrimitiveValue *val = new nsROCSSPrimitiveValue;
  val->SetIdent(nsCSSProps::ValueToKeywordEnum(StyleDisplay()->mDisplayBox,
                                               nsCSSProps::kDisplayBoxKTable));
  return val;
}

CSSValue*
nsComputedDOMStyle::DoGetDisplay()
{
  nsROCSSPrimitiveValue *val = new nsROCSSPrimitiveValue;
  val->SetIdent(nsCSSProps::ValueToKeywordEnum(StyleDisplay()->mDisplay,
                                               nsCSSProps::kDisplayKTable));
  return val;
}






  mozilla::dom::CSSValue* DoGetWritingMode();

  /* Direction properties */
  mozilla::dom::CSSValue* DoGetDirection();
  mozilla::dom::CSSValue* DoGetUnicodeBidi();

  /* Display properties */
  mozilla::dom::CSSValue* DoGetBinding();
  mozilla::dom::CSSValue* DoGetDisplayBox();
  mozilla::dom::CSSValue* DoGetClear();
  mozilla::dom::CSSValue* DoGetFloat();
  mozilla::dom::CSSValue* DoGetDisplay();
  mozilla::dom::CSSValue* DoGetPosition();
  mozilla::dom::CSSValue* DoGetClip();
  mozilla::dom::CSSValue* DoGetImageOrientation();
  mozilla::dom::CSSValue* DoGetWillChange();
  mozilla::dom::CSSValue* DoGetOverflow();





COMPUTED_STYLE_PROP(clip,                          Clip)
COMPUTED_STYLE_PROP(color,                         Color)
COMPUTED_STYLE_PROP(content,                       Content)
COMPUTED_STYLE_PROP(counter_increment,             CounterIncrement)
COMPUTED_STYLE_PROP(counter_reset,                 CounterReset)
COMPUTED_STYLE_PROP(cursor,                        Cursor)
COMPUTED_STYLE_PROP(direction,                     Direction)
COMPUTED_STYLE_PROP(display,                       Display)
COMPUTED_STYLE_PROP(display_box,                   DisplayBox)
COMPUTED_STYLE_PROP(empty_cells,                   EmptyCells)
COMPUTED_STYLE_PROP(flex_basis,                    FlexBasis)
COMPUTED_STYLE_PROP(flex_direction,                FlexDirection)
COMPUTED_STYLE_PROP(flex_grow,                     FlexGrow)
COMPUTED_STYLE_PROP(flex_shrink,                   FlexShrink)
COMPUTED_STYLE_PROP(flex_wrap,                     FlexWrap)
COMPUTED_STYLE_PROP(float,                         Float)
//// COMPUTED_STYLE_PROP(font,                     Font)





            SETFCT_OPACITY | SETFCT_UNSET_INITIAL);

  // display: enum, inherit, initial
  SetDiscrete(*aRuleData->ValueForDisplay(), display->mDisplay, canStoreInRuleTree,
              SETDSC_ENUMERATED | SETDSC_UNSET_INITIAL,
              parentDisplay->mDisplay,
              NS_STYLE_DISPLAY_INLINE, 0, 0, 0, 0);

  // display-box: enum, inherit, initial
  if (display->mDisplay == NS_STYLE_DISPLAY_NONE) {
    // display:none implies display-box:none.
    display->mDisplayBox = NS_STYLE_DISPLAY_BOX_NONE;
    canStoreInRuleTree = false;
  } else {
    SetDiscrete(*aRuleData->ValueForDisplayBox(), display->mDisplayBox, canStoreInRuleTree,
                SETDSC_ENUMERATED | SETDSC_UNSET_INITIAL, parentDisplay->mDisplayBox,
                NS_STYLE_DISPLAY_BOX_NORMAL, 0, 0, 0, 0);
  }

  // mix-blend-mode: enum, inherit, initial
  SetDiscrete(*aRuleData->ValueForMixBlendMode(), display->mMixBlendMode,
              canStoreInRuleTree,
              SETDSC_ENUMERATED | SETDSC_UNSET_INITIAL,
              parentDisplay->mMixBlendMode, NS_STYLE_BLEND_NORMAL,
              0, 0, 0, 0);

  // Backup original display value for calculation of a hypothetical

    NS_ABORT_IF_FALSE(false, "unrecognized clip unit");
  }

  if (display->mDisplay != NS_STYLE_DISPLAY_NONE) {
    // CSS2 9.7 specifies display type corrections dealing with 'float'
    // and 'position'.  Since generated content can't be floated or
    // positioned, we can deal with it here.

    if (display->mDisplayBox == NS_STYLE_DISPLAY_BOX_CONTENTS && aContext->GetPseudo()) {
      // We don't want to create frames for anonymous content using a parent
      // frame that is for content above the root of the anon tree.
      // (XXX what we realy should check here is not GetPseudo() but if there's
      //  a 'content' property value that implies anon content but we can't
      //  check that here since that's a different struct(?))
      // We might get display-box:contents to work for CSS_PSEUDO_ELEMENT_CONTAINS_ELEMENTS
      // pseudos (:first-letter etc) in the future, but those have a lot of
      // special handling in frame construction so they are also unsupported
      // for now.
      display->mDisplayBox = NS_STYLE_DISPLAY_BOX_NORMAL;
      canStoreInRuleTree = false;
    }

    if (nsCSSPseudoElements::firstLetter == aContext->GetPseudo()) {
      // a non-floating first-letter must be inline
      // XXX this fix can go away once bug 103189 is fixed correctly
      // Note that we reset mOriginalDisplay to enforce the invariant that it equals mDisplay if we're not positioned or floating.
      display->mOriginalDisplay = display->mDisplay = NS_STYLE_DISPLAY_INLINE;

      // We can't cache the data in the rule tree since if a more specific
      // rule has 'float: left' we'll end up with the wrong 'display'





#define NS_STYLE_DISPLAY_POPUP                  27
#define NS_STYLE_DISPLAY_GROUPBOX               28
#endif
#define NS_STYLE_DISPLAY_FLEX                   29
#define NS_STYLE_DISPLAY_INLINE_FLEX            30
#define NS_STYLE_DISPLAY_GRID                   31
#define NS_STYLE_DISPLAY_INLINE_GRID            32

// See nsStyleDisplay
#define NS_STYLE_DISPLAY_BOX_NORMAL             0
#define NS_STYLE_DISPLAY_BOX_NONE               1
#define NS_STYLE_DISPLAY_BOX_CONTENTS           2

// See nsStylePosition
#define NS_STYLE_ALIGN_CONTENT_FLEX_START       0
#define NS_STYLE_ALIGN_CONTENT_FLEX_END         1
#define NS_STYLE_ALIGN_CONTENT_CENTER           2
#define NS_STYLE_ALIGN_CONTENT_SPACE_BETWEEN    3
#define NS_STYLE_ALIGN_CONTENT_SPACE_AROUND     4
#define NS_STYLE_ALIGN_CONTENT_STRETCH          5






  }

  // Adjust the "display" values of flex and grid items (but not for raw text,
  // placeholders, or table-parts). CSS3 Flexbox section 4 says:
  //   # The computed 'display' of a flex item is determined
  //   # by applying the table in CSS 2.1 Chapter 9.7.
  // ...which converts inline-level elements to their block-level equivalents.
  if (!aSkipParentDisplayBasedStyleFixup && mParent) {
    // Skip display-box:contents ancestors to reach the potential container.
    // (If there are only display-box:contents ancestors between this node and
    // a flex/grid container ancestor, then this node is a flex/grid item, since
    // its parent *in the frame tree* will be the flex/grid container. So we treat
    // it like a flex/grid item here.)
    nsStyleContext* containerContext = mParent;
    const nsStyleDisplay* containerDisp = containerContext->StyleDisplay();
    while (containerDisp->mDisplayBox == NS_STYLE_DISPLAY_BOX_CONTENTS) {
      if (!containerContext->GetParent()) {
        break;
      }
      containerContext = containerContext->GetParent();
      containerDisp = containerContext->StyleDisplay();
    }
    if ((containerDisp->mDisplay == NS_STYLE_DISPLAY_FLEX ||
         containerDisp->mDisplay == NS_STYLE_DISPLAY_INLINE_FLEX ||
         containerDisp->mDisplay == NS_STYLE_DISPLAY_GRID ||
         containerDisp->mDisplay == NS_STYLE_DISPLAY_INLINE_GRID) &&
        GetPseudo() != nsCSSAnonBoxes::mozNonElement) {
      uint8_t displayVal = disp->mDisplay;
      // Skip table parts.
      // NOTE: This list needs to be kept in sync with
      // nsCSSFrameConstructor.cpp's "sDisplayData" array -- specifically,
      // this should be the list of display-values that have
      // FCDATA_DESIRED_PARENT_TYPE_TO_BITS specified in that array.
      if (NS_STYLE_DISPLAY_TABLE_CAPTION      != displayVal &&





  // 'content' property is equivalent to not having the pseudo-element
  // at all.
  if (result &&
      (pseudoTag == nsCSSPseudoElements::before ||
       pseudoTag == nsCSSPseudoElements::after)) {
    const nsStyleDisplay *display = result->StyleDisplay();
    const nsStyleContent *content = result->StyleContent();
    // XXXldb What is contentCount for |content: ""|?
    if (display->mDisplayBox == NS_STYLE_DISPLAY_BOX_NONE ||
        content->ContentCount() == 0) {
      result = nullptr;
    }
  }

  return result.forget();
}






  mIterationCount = 1.0f;
}

nsStyleDisplay::nsStyleDisplay()
  : mWillChangeBitField(0)
{
  MOZ_COUNT_CTOR(nsStyleDisplay);
  mAppearance = NS_THEME_NONE;
  mDisplayBox = NS_STYLE_DISPLAY_BOX_NORMAL;
  mDisplay = NS_STYLE_DISPLAY_INLINE;
  mOriginalDisplay = mDisplay;
  mPosition = NS_STYLE_POSITION_STATIC;
  mFloats = NS_STYLE_FLOAT_NONE;
  mOriginalFloats = mFloats;
  mBreakType = NS_STYLE_CLEAR_NONE;
  mBreakInside = NS_STYLE_PAGE_BREAK_AUTO;
  mBreakBefore = false;

  mAnimationPlayStateCount = 1;
  mAnimationIterationCountCount = 1;
}

nsStyleDisplay::nsStyleDisplay(const nsStyleDisplay& aSource)
  : mBinding(aSource.mBinding)
  , mClip(aSource.mClip)
  , mOpacity(aSource.mOpacity)
  , mDisplayBox(aSource.mDisplayBox)
  , mDisplay(aSource.mDisplay)
  , mOriginalDisplay(aSource.mOriginalDisplay)
  , mAppearance(aSource.mAppearance)
  , mPosition(aSource.mPosition)
  , mFloats(aSource.mFloats)
  , mOriginalFloats(aSource.mOriginalFloats)
  , mBreakType(aSource.mBreakType)
  , mBreakInside(aSource.mBreakInside)

  mTransformOrigin[1] = aSource.mTransformOrigin[1];
  mTransformOrigin[2] = aSource.mTransformOrigin[2];
  mPerspectiveOrigin[0] = aSource.mPerspectiveOrigin[0];
  mPerspectiveOrigin[1] = aSource.mPerspectiveOrigin[1];
}

nsChangeHint nsStyleDisplay::CalcDifference(const nsStyleDisplay& aOther) const
{
  nsChangeHint hint = nsChangeHint(0);

  if (!EqualURIs(mBinding, aOther.mBinding)
      || mPosition != aOther.mPosition
      || mDisplay != aOther.mDisplay
      || (mFloats == NS_STYLE_FLOAT_NONE) != (aOther.mFloats == NS_STYLE_FLOAT_NONE)
      || mOverflowX != aOther.mOverflowX
      || mOverflowY != aOther.mOverflowY
      || mResize != aOther.mResize
      || mDisplayBox != aOther.mDisplayBox) {
    return nsChangeHint_ReconstructFrame;
  }

  nsChangeHint hint = nsChangeHint(0);
  if ((mAppearance == NS_THEME_TEXTFIELD &&
       aOther.mAppearance != NS_THEME_TEXTFIELD) ||
      (mAppearance != NS_THEME_TEXTFIELD &&
       aOther.mAppearance == NS_THEME_TEXTFIELD)) {
    // This is for <input type=number> where we allow authors to specify a
    // |-moz-appearance:textfield| to get a control without a spinner. (The
    // spinner is present for |-moz-appearance:number-input| but also other
    // values such as 'none'.) We need to reframe since we want to use





    return nsChangeHint(0);
  }

  // We guarantee that if mBinding is non-null, so are mBinding->GetURI() and
  // mBinding->mOriginPrincipal.
  nsRefPtr<mozilla::css::URLValue> mBinding;    // [reset]
  nsRect  mClip;                // [reset] offsets from upper-left border edge
  float   mOpacity;             // [reset]
  uint8_t mDisplayBox;          // [reset] NS_STYLE_DISPLAY_BOX_NORMAL/NONE/CONTENTS
  uint8_t mDisplay;             // [reset] see nsStyleConsts.h NS_STYLE_DISPLAY_*
  uint8_t mOriginalDisplay;     // [reset] saved mDisplay for position:absolute/fixed
                                //         and float:left/right; otherwise equal
                                //         to mDisplay
  uint8_t mAppearance;          // [reset]
  uint8_t mPosition;            // [reset] see nsStyleConsts.h
  uint8_t mFloats;              // [reset] see nsStyleConsts.h NS_STYLE_FLOAT_*
  uint8_t mOriginalFloats;      // [reset] saved mFloats for position:absolute/fixed;





  }
  return IsOriginalDisplayInlineOutsideStyle();
}

uint8_t
nsStyleDisplay::GetDisplay(const nsIFrame* aContextFrame) const
{
  NS_ASSERTION(aContextFrame->StyleDisplay() == this, "unexpected aContextFrame");
  if (aContextFrame->IsSVGText() && mDisplayBox != NS_STYLE_DISPLAY_BOX_NONE) {
      mDisplay != NS_STYLE_DISPLAY_NONE) {
    return aContextFrame->GetType() == nsGkAtoms::blockFrame ?
             NS_STYLE_DISPLAY_BLOCK :
             NS_STYLE_DISPLAY_INLINE;
  }
  return mDisplay;
}

bool





    inherited: false,
    type: CSS_TYPE_LONGHAND,
    initial_values: [ "padding-box" ],
    other_values: [ "content-box" ],
    invalid_values: [ "none", "auto", "border-box", "0" ]
  };
}

if (SpecialPowers.getBoolPref("layout.css.display-box.enabled")) {
  gCSSProperties["display-box"] = {
    domProp: "displayBox",
    inherited: false,
    type: CSS_TYPE_LONGHAND,
    initial_values: [ "normal" ],
    other_values: [ "none", "contents" ],
    invalid_values: [ "auto", "0" ]
  };
}

if (SpecialPowers.getBoolPref("layout.css.box-decoration-break.enabled")) {
  gCSSProperties["box-decoration-break"] = {
    domProp: "boxDecorationBreak",
    inherited: false,
    type: CSS_TYPE_LONGHAND,
    initial_values: [ "slice" ],
    other_values: [ "clone" ],
    invalid_values: [ "auto",  "none",  "1px" ]





    nsTableColFrame* colFrame = (nsTableColFrame*)aOldFrame;
    if (colFrame->GetColType() == eColContent) {
      contentRemoval = true;
      // Remove any anonymous column frames this <col> produced via a colspan
      nsTableColFrame* col = colFrame->GetNextCol();
      nsTableColFrame* nextCol;
      while (col && col->GetColType() == eColAnonymousCol) {
#ifdef DEBUG
        nsIFrame* providerFrame;
        nsStyleContext* psc = colFrame->GetParentStyleContext(&providerFrame);
        if (colFrame->StyleContext()->GetParent() == psc) {
          NS_ASSERTION(col->StyleContext() == colFrame->StyleContext() &&
                       col->GetContent() == colFrame->GetContent(),
                       "How did that happen??");
        }
        // else colFrame is being removed because of a frame
        // reconstruct on it, and its style context is still the old
        // one, so we can't assert anything about how it compares to
        // col's style context.





  BCPixelSize mTopBorderWidth;
  BCPixelSize mRightBorderWidth;
  BCPixelSize mBottomBorderWidth;
  BCPixelSize mLeftBorderWidth;
  BCPixelSize mLeftCellBorderWidth;
  BCPixelSize mRightCellBorderWidth;
};

nsStyleContext*
nsTableFrame::GetParentStyleContext(nsIFrame** aProviderFrame) const
{
  // Since our parent, the table outer frame, returned this frame, we
  // must return whatever our parent would normally have returned.

  NS_PRECONDITION(GetParent(), "table constructed without outer table");
  if (!mContent->GetParent() && !StyleContext()->GetPseudo()) {
    // We're the root.  We have no style context parent.
    *aProviderFrame = nullptr;
    return nullptr;
  }

  return GetParent()->DoGetParentStyleContext(aProviderFrame);
}


nsIAtom*
nsTableFrame::GetType() const
{
  return nsGkAtoms::tableFrame;
}





  void ReflowTable(nsHTMLReflowMetrics&     aDesiredSize,
                   const nsHTMLReflowState& aReflowState,
                   nscoord                  aAvailHeight,
                   nsIFrame*&               aLastChildReflowed,
                   nsReflowStatus&          aStatus);

  nsFrameList& GetColGroups();

  virtual nsStyleContext*
  GetParentStyleContext(nsIFrame** aProviderFrame) const MOZ_OVERRIDE;

  /**
   * Get the "type" of the frame
   *
   * @see nsGkAtoms::tableFrame
   */
  virtual nsIAtom* GetType() const MOZ_OVERRIDE;






/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsTableOuterFrame.h"

#include "nsFrameManager.h"
#include "nsTableFrame.h"
#include "nsTableCellFrame.h"
#include "nsStyleContext.h"
#include "nsStyleConsts.h"
#include "nsPresContext.h"
#include "nsCSSRendering.h"
#include "nsIContent.h"
#include "prinrval.h"

    if (min > aCBSize.width)
      min = aCBSize.width;
    if (min > result.width)
      result.width = min;
  }
  return result;
}

nsStyleContext*
nsTableCaptionFrame::GetParentStyleContext(nsIFrame** aProviderFrame) const
{
  MOZ_ASSERT(GetContent()->GetParent(), "How could we not have a parent here?");
                  "How could we not have a parent here?");
    
  nsStyleContext* sc =
    PresContext()->FrameManager()->GetDisplayBoxContentsStyleFor(GetContent()->GetParent());
  if (sc) {
    *aProviderFrame = nullptr;
    return sc;
  }

  // The caption's style context parent is the inner frame, unless
  // it's anonymous.
  nsIFrame* outerFrame = GetParent();
  if (outerFrame && outerFrame->GetType() == nsGkAtoms::tableOuterFrame) {
    nsIFrame* innerFrame = outerFrame->GetFirstPrincipalChild();
    if (innerFrame) {
      *aProviderFrame = nsFrame::CorrectStyleParentFrame(innerFrame,
                                   StyleContext()->GetPseudo());
      return *aProviderFrame ? (*aProviderFrame)->StyleContext() : nullptr;
    }
  }

  NS_NOTREACHED("Where is our inner table frame?");
  return nsBlockFrame::GetParentStyleContext(aProviderFrame);
}

#ifdef ACCESSIBILITY
a11y::AccType
nsTableCaptionFrame::AccessibleType()
{
  if (!GetRect().IsEmpty()) {
    return a11y::eHTMLCaptionType;

  nsIFrame* kid = mFrames.FirstChild();
  // The children should be in content order
  while (kid) {
    BuildDisplayListForChild(aBuilder, kid, aDirtyRect, aLists);
    kid = kid->GetNextSibling();
  }
}

nsStyleContext*
nsTableOuterFrame::GetParentStyleContext(nsIFrame** aProviderFrame) const
{
  // The table outer frame and the (inner) table frame split the style
  // data by giving the table frame the style context associated with
  // the table content node and creating a style context for the outer
  // frame that is a *child* of the table frame's style context,
  // matching the ::-moz-table-outer pseudo-element.  html.css has a
  // rule that causes that pseudo-element (and thus the outer table)
  // to inherit *some* style properties from the table frame.  The
  // children of the table inherit directly from the inner table, and
  // the outer table's style context is a leaf.

  return (*aProviderFrame = InnerTableFrame())->StyleContext();
}

// INCREMENTAL REFLOW HELPER FUNCTIONS 

void
nsTableOuterFrame::InitChildReflowState(nsPresContext&    aPresContext,                     
                                        nsHTMLReflowState& aReflowState)
                                    





  // nsIFrame
  virtual nsIAtom* GetType() const MOZ_OVERRIDE;

  virtual nsSize ComputeAutoSize(nsRenderingContext *aRenderingContext,
                                 nsSize aCBSize, nscoord aAvailableWidth,
                                 nsSize aMargin, nsSize aBorder,
                                 nsSize aPadding, bool aShrinkWrap) MOZ_OVERRIDE;

  virtual nsStyleContext* GetParentStyleContext(nsIFrame** aProviderFrame) const MOZ_OVERRIDE;

#ifdef ACCESSIBILITY
  virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
#endif

#ifdef DEBUG_FRAME_DUMP
  virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
#endif

   * @see nsGkAtoms::tableOuterFrame
   */
  virtual nsIAtom* GetType() const MOZ_OVERRIDE;

#ifdef DEBUG_FRAME_DUMP
  virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
#endif

  virtual nsStyleContext* GetParentStyleContext(nsIFrame** aProviderFrame) const MOZ_OVERRIDE;

  /**
   * Return the content for the cell at the given row and column.
   */
  nsIContent* GetCellAt(uint32_t aRowIdx, uint32_t aColIdx) const;

  /**
   * Return the number of rows in the table.





pref("layout.css.grid.enabled", false);

// Is support for CSS box-decoration-break enabled?
pref("layout.css.box-decoration-break.enabled", true);

// Is layout of CSS outline-style:auto enabled?
pref("layout.css.outline-style-auto.enabled", false);

// Is support for the CSS display-box property enabled?
pref("layout.css.display-box.enabled", false);

// pref for which side vertical scrollbars should be on
// 0 = end-side in UI direction
// 1 = end-side in document/content direction
// 2 = right
// 3 = left
pref("layout.scrollbar.side", 0);

// pref to stop overlay scrollbars from fading out, for testing purposes

Return to bug 907396