puppeteer · aslushnikov · Apr 8, 2018 · Apr 7, 2018 · aslushnikov · Apr 8, 2018
diff --git a/lib/Coverage.js b/lib/Coverage.js
@@ -106,7 +106,7 @@ class JSCoverage {
   }
 
   /**
-   * @param {!Object} event
+   * @param {!Protocol.Debugger.scriptParsedPayload} event
    */
   async _onScriptParsed(event) {
     // Ignore anonymous scripts
@@ -193,7 +193,7 @@ class CSSCoverage {
   }
 
   /**
-   * @param {!Object} event
+   * @param {!Protocol.CSS.styleSheetAddedPayload} event
    */
   async _onStyleSheet(event) {
     const header = event.header;

diff --git a/lib/ElementHandle.js b/lib/ElementHandle.js
@@ -80,7 +80,7 @@ class ElementHandle extends JSHandle {
   }
 
   /**
-   * @return {!Promise<?{model: object}>}
+   * @return {!Promise<void|Protocol.DOM.getBoxModelReturnValue>}
    */
   _getBoxModel() {
     return this._client.send('DOM.getBoxModel', {

diff --git a/lib/EmulationManager.js b/lib/EmulationManager.js
@@ -33,13 +33,13 @@ class EmulationManager {
     const width = viewport.width;
     const height = viewport.height;
     const deviceScaleFactor = viewport.deviceScaleFactor || 1;
+    /** @type {Protocol.Emulation.ScreenOrientation} */
     const screenOrientation = viewport.isLandscape ? { angle: 90, type: 'landscapePrimary' } : { angle: 0, type: 'portraitPrimary' };
 
     await Promise.all([
       this._client.send('Emulation.setDeviceMetricsOverride', { mobile, width, height, deviceScaleFactor, screenOrientation }),
       this._client.send('Emulation.setTouchEmulationEnabled', {
-        enabled: viewport.hasTouch || false,
-        configuration: viewport.isMobile ? 'mobile' : 'desktop'
+        enabled: viewport.hasTouch || false
       })
     ]);
 

diff --git a/lib/ExecutionContext.js b/lib/ExecutionContext.js
@@ -61,7 +61,7 @@ class ExecutionContext {
   async evaluateHandle(pageFunction, ...args) {
     if (helper.isString(pageFunction)) {
       const contextId = this._contextId;
-      const expression = pageFunction;
+      const expression = /** @type {string} */ (pageFunction);
       const { exceptionDetails, result: remoteObject } = await this._client.send('Runtime.evaluate', { expression, contextId, returnByValue: false, awaitPromise: true});
       if (exceptionDetails)
         throw new Error('Evaluation failed: ' + helper.getExceptionMessage(exceptionDetails));

diff --git a/lib/FrameManager.js b/lib/FrameManager.js
@@ -25,7 +25,7 @@ const readFileAsync = helper.promisify(fs.readFile);
 class FrameManager extends EventEmitter {
   /**
    * @param {!Puppeteer.CDPSession} client
-   * @param {{frame: Object, childFrames: ?Array}} frameTree
+   * @param {!Protocol.Page.FrameTree} frameTree
    * @param {!Puppeteer.Page} page
    */
   constructor(client, frameTree, page) {
@@ -34,7 +34,7 @@ class FrameManager extends EventEmitter {
     this._page = page;
     /** @type {!Map<string, !Frame>} */
     this._frames = new Map();
-    /** @type {!Map<string, !ExecutionContext>} */
+    /** @type {!Map<number, !ExecutionContext>} */
     this._contextIdToContext = new Map();
 
     this._client.on('Page.frameAttached', event => this._onFrameAttached(event.frameId, event.parentFrameId));
@@ -49,7 +49,7 @@ class FrameManager extends EventEmitter {
   }
 
   /**
-   * @param {!Object} event
+   * @param {!Protocol.Page.lifecycleEventPayload} event
    */
   _onLifecycleEvent(event) {
     const frame = this._frames.get(event.frameId);
@@ -60,7 +60,7 @@ class FrameManager extends EventEmitter {
   }
 
   /**
-   * @param {{frame: Object, childFrames: ?Array}} frameTree
+   * @param {!Protocol.Page.FrameTree} frameTree
    */
   _handleFrameTree(frameTree) {
     if (frameTree.frame.parentId)
@@ -171,7 +171,7 @@ class FrameManager extends EventEmitter {
   }
 
   /**
-   * @param {string} executionContextId
+   * @param {number} executionContextId
    */
   _onExecutionContextDestroyed(executionContextId) {
     const context = this._contextIdToContext.get(executionContextId);
@@ -188,7 +188,7 @@ class FrameManager extends EventEmitter {
   }
 
   /**
-   * @param {string} contextId
+   * @param {number} contextId
    * @param {*} remoteObject
    * @return {!JSHandle}
    */

diff --git a/lib/NetworkManager.js b/lib/NetworkManager.js
@@ -126,10 +126,11 @@ class NetworkManager extends EventEmitter {
   }
 
   /**
-   * @param {!Object} event
+   * @param {!Protocol.Network.requestInterceptedPayload} event
    */
   _onRequestIntercepted(event) {
     if (event.authChallenge) {
+      /** @type {"Default"|"CancelAuth"|"ProvideCredentials"} */
       let response = 'Default';
       if (this._attemptedAuthentications.has(event.interceptionId)) {
         response = 'CancelAuth';
@@ -170,7 +171,7 @@ class NetworkManager extends EventEmitter {
   }
 
   /**
-   * @param {!Object} event
+   * @param {!Protocol.Network.requestServedFromCachePayload} event
    */
   _onRequestServedFromCache(event) {
     const request = this._requestIdToRequest.get(event.requestId);
@@ -219,7 +220,7 @@ class NetworkManager extends EventEmitter {
   }
 
   /**
-   * @param {!Object} event
+   * @param {!Protocol.Network.requestWillBeSentPayload} event
    */
   _onRequestWillBeSent(event) {
     if (this._protocolRequestInterceptionEnabled) {
@@ -251,7 +252,7 @@ class NetworkManager extends EventEmitter {
   }
 
   /**
-   * @param {!Object} event
+   * @param {!Protocol.Network.responseReceivedPayload} event
    */
   _onResponseReceived(event) {
     const request = this._requestIdToRequest.get(event.requestId);
@@ -265,7 +266,7 @@ class NetworkManager extends EventEmitter {
   }
 
   /**
-   * @param {!Object} event
+   * @param {!Protocol.Network.loadingFinishedPayload} event
    */
   _onLoadingFinished(event) {
     const request = this._requestIdToRequest.get(event.requestId);
@@ -281,7 +282,7 @@ class NetworkManager extends EventEmitter {
   }
 
   /**
-   * @param {!Object} event
+   * @param {!Protocol.Network.loadingFailedPayload} event
    */
   _onLoadingFailed(event) {
     const request = this._requestIdToRequest.get(event.requestId);

diff --git a/lib/Page.js b/lib/Page.js
@@ -63,7 +63,7 @@ class Page extends EventEmitter {
   /**
    * @param {!Puppeteer.CDPSession} client
    * @param {!Puppeteer.Target} target
-   * @param {{frame: Object, childFrames: ?Array}} frameTree
+   * @param {!Protocol.Page.FrameTree} frameTree
    * @param {boolean} ignoreHTTPSErrors
    * @param {!Puppeteer.TaskQueue} screenshotTaskQueue
    */
@@ -182,7 +182,7 @@ class Page extends EventEmitter {
   }
 
   /**
-   * @param {!Object} event
+   * @param {!Protocol.Security.certificateErrorPayload} event
    */
   _onCertificateError(event) {
     if (!this._ignoreHTTPSErrors)
@@ -404,7 +404,7 @@ class Page extends EventEmitter {
   }
 
   /**
-   * @param {!Object} exceptionDetails
+   * @param {!Protocol.Runtime.ExceptionDetails} exceptionDetails
    */
   _handleException(exceptionDetails) {
     const message = helper.getExceptionMessage(exceptionDetails);
@@ -708,7 +708,7 @@ class Page extends EventEmitter {
   }
 
   /**
-   * @param {string} format
+   * @param {"png"|"jpeg"} format
    * @param {!Object=} options
    * @return {!Promise<!Buffer>}
    */
@@ -728,6 +728,7 @@ class Page extends EventEmitter {
       const mobile = this._viewport.isMobile || false;
       const deviceScaleFactor = this._viewport.deviceScaleFactor || 1;
       const landscape = this._viewport.isLandscape || false;
+      /** @type {!Protocol.Emulation.ScreenOrientation} */
       const screenOrientation = landscape ? { angle: 90, type: 'landscapePrimary' } : { angle: 0, type: 'portraitPrimary' };
       await this._client.send('Emulation.setDeviceMetricsOverride', { mobile, width, height, deviceScaleFactor, screenOrientation });
     }
@@ -1024,7 +1025,7 @@ Page.Events = {
 /**
  * @typedef {Object} Network.CookieParam
  * @property {string} name
- * @property {string=} value
+ * @property {string} value
  * @property {string=} url
  * @property {string=} domain
  * @property {string=} path

diff --git a/lib/externs.d.ts b/lib/externs.d.ts
@@ -12,7 +12,10 @@ import * as child_process from 'child_process';
 declare global {
   module Puppeteer {
     export class Connection extends RealConnection {}
-    export class CDPSession extends RealCDPSession {}
+    export class CDPSession extends RealCDPSession {
+      on<T extends keyof Protocol.Events>(event: T, listener: (arg: Protocol.Events[T]) => void): this;
+      send<T extends keyof Protocol.CommandParameters>(message: T, parameters?: Protocol.CommandParameters[T]): Promise<Protocol.CommandReturnValues[T]>;
+    }
     export class Mouse extends RealMouse {}
     export class Keyboard extends RealKeyboard {}
     export class Touchscreen extends RealTouchscreen {}

diff --git a/utils/protocol-types-generator/index.js b/utils/protocol-types-generator/index.js
@@ -1,3 +1,4 @@
+// @ts-check
 const puppeteer = require('../..');
 puppeteer.launch({
   pipe: false,
@@ -11,28 +12,59 @@ puppeteer.launch({
   await browser.close();
   const output = `// This is generated from /utils/protocol-types-generator/index.js
 declare global {
-  module Protocol {
-    ${json.domains.map(domain => `${domain.description ? `
+  module Protocol {${json.domains.map(domain => `${domain.description ? `
     /**
      * ${domain.description}
      */` : ''}
-    export module ${domain.domain} {
-      ${(domain.types || []).map(type => `${type.description ? `
+    export module ${domain.domain} {${(domain.types || []).map(type => `${type.description ? `
         /**
          * ${type.description}
          */` : ''}${type.properties ? `
-          export interface ${type.id} {
-          ${(type.properties || []).map(property => `${property.description ? `
+        export interface ${type.id} {${(type.properties || []).map(property => `${property.description ? `
             /**
              * ${property.description}
              */` : ''}
-            ${property.name}${property.optional ? '?' : ''}: ${typeOfProperty(property)};
-          `).join(``)}
+            ${property.name}${property.optional ? '?' : ''}: ${typeOfProperty(property)};`).join(``)}
         }` : `
-        export type ${type.id} = ${typeOfProperty(type)};`}
-      `).join('')}
+        export type ${type.id} = ${typeOfProperty(type)};`}`).join('')}
+        ${(domain.events || []).map(event => `${event.description ? `
+        /**
+         * ${event.description}
+         */` : ''}${event.parameters ? `
+        export type ${event.name}Payload = {${event.parameters.map(parameter => `${parameter.description ? `
+            /**
+             * ${parameter.description}
+             */` : ''}
+            ${parameter.name}${parameter.optional ? '?' : ''}: ${typeOfProperty(parameter)};`).join(``)}
+        }` : `
+        export type ${event.name}Payload = void;`}`).join('')}
+        ${(domain.commands || []).map(command => `${command.description ? `
+        /**
+         * ${command.description}
+         */` : ''}
+        export type ${command.name}Parameters = {${(command.parameters || []).map(parameter => `${parameter.description ? `
+            /**
+             * ${parameter.description}
+             */` : ''}
+            ${parameter.name}${parameter.optional ? '?' : ''}: ${typeOfProperty(parameter)};`).join(``)}
+        }
+        export type ${command.name}ReturnValue = {${(command.returns || []).map(retVal => `${retVal.description ? `
+            /**
+             * ${retVal.description}
+             */` : ''}
+            ${retVal.name}${retVal.optional ? '?' : ''}: ${typeOfProperty(retVal)};`).join(``)}
+        }`).join('')}
     }
     `).join('')}
+    export interface Events {${json.domains.map(domain => (domain.events || []).map(event => `
+      "${domain.domain}.${event.name}": ${domain.domain}.${event.name}Payload;`).join('')).join('')}
+    }
+    export interface CommandParameters {${json.domains.map(domain => (domain.commands || []).map(command => `
+      "${domain.domain}.${command.name}": ${domain.domain}.${command.name}Parameters;`).join('')).join('')}
+    }
+    export interface CommandReturnValues {${json.domains.map(domain => (domain.commands || []).map(command => `
+      "${domain.domain}.${command.name}": ${domain.domain}.${command.name}ReturnValue;`).join('')).join('')}
+    }
   }
 }
 // empty export to keep file a module
@@ -41,12 +73,26 @@ export {}
   require('fs').writeFileSync(require('path').join(__dirname, '..', '..', 'lib', 'protocol.d.ts'), output);
 });
 
-function typeOfProperty(property) {
-  if (property.$ref) return property.$ref;
+
+/**
+ * @typedef {Object} Property
+ * @property {string=} $ref
+ * @property {!Array=} enum
+ * @property {string=} type
+ * @property {!Property=} items
+ * @property {string=} description
+ */
+
+/**
+ * @param {!Property} property
+ * @param {string=} domain
+ */
+function typeOfProperty(property, domain) {
+  if (property.$ref) return property.$ref.includes('.') || !domain ? property.$ref : domain + '.' + property.$ref;
   if (property.enum) return property.enum.map(value => JSON.stringify(value)).join('|');
   switch (property.type) {
     case 'array':
-      return typeOfProperty(property.items) + '[]';
+      return typeOfProperty(property.items, domain) + '[]';
     case 'integer':
       return 'number';
   }