gopdf.options.fit_mode = "width"
gopdf.options.dual_page = true
gopdf.options.status_bar_visible = true

gopdf.bind("H", gopdf.prev_page)
gopdf.bind("L", gopdf.next_page)

gopdf.options.status_bar_visible = true
gopdf.options.mouse_text_select = true
gopdf.options.natural_scroll = false
gopdf.options.session_database = true           -- per-document view state database
gopdf.options.anti_aliasing = 8                -- 0 disables AA; MuPDF clamps values to 0-8
gopdf.options.alt_colors = false
gopdf.options.render_oversample = 1            -- >1 supersamples, <1 undersamples

gopdf.options.render_mode = "continuous"       -- "continuous" or "single"
gopdf.options.dual_page = false
gopdf.options.first_page_offset = true
gopdf.options.fit_mode = "page"                -- "page", "width", or "manual"

gopdf.options.page_gap = 0                      -- sets vertical gap too
gopdf.options.spread_gap = 0                    -- sets horizontal gap too
gopdf.options.page_gap_vertical = 0
gopdf.options.page_gap_horizontal = 0

gopdf.options.scroll_step = 64
gopdf.options.status_bar_height = 28
gopdf.options.status_bar_padding = 8
gopdf.options.ui_font_size = 14
gopdf.options.ui_font_path = ""                -- empty = default font
gopdf.options.sequence_timeout_ms = 700

gopdf.options.outline_initial_depth = 1
gopdf.options.outline_width_percent = 70
gopdf.options.outline_height_percent = 80
gopdf.options.completion_max_items = 10
gopdf.options.recent_files_max = 10

-- Colors are { red, green, blue }, 0-255.
gopdf.options.background = { 220, 220, 220 }
gopdf.options.page_background = { 255, 255, 255 }
gopdf.options.foreground = { 20, 20, 20 }
gopdf.options.status_bar_color = { 220, 220, 220 }
gopdf.options.alt_background = { 20, 20, 20 }
gopdf.options.alt_page_background = { 17, 17, 17 }
gopdf.options.alt_foreground = { 255, 255, 255 }
gopdf.options.alt_status_bar_color = { 20, 20, 20 }
gopdf.options.highlight_foreground = { 0, 0, 0 }
gopdf.options.highlight_background = { 255, 224, 102 }

gopdf.status_bar.height = 28
gopdf.status_bar.left = "{message}"
gopdf.status_bar.right = "{page}/{total} {mode} fit={fit} rot={rot} {zoom}"

gopdf.status_bar.height = 32
gopdf.options.ui_font_size = 13
gopdf.options.ui_font_path = "/usr/share/fonts/truetype/dejavu/DejaVuSansMono.ttf"
gopdf.status_bar.left = " {document} {message}"
gopdf.status_bar.right = " {page}/{total} | {mode} | {search} | {zoom} "

gopdf.bind("j", gopdf.scroll_down)
gopdf.bind("J", gopdf.next_page)
gopdf.bind("gg", gopdf.first_page)
gopdf.bind("<C-o>", gopdf.jump_backward)
gopdf.bind("<Space>", gopdf.pan)       -- hold Space and move mouse to pan

gopdf.bind_mouse("wheel_down", gopdf.scroll_down)
gopdf.bind_mouse("<C-wheel_up>", gopdf.zoom_in)
gopdf.bind_mouse("middle_down", gopdf.pan)

gopdf.bind("H", function()
  gopdf.goto_page(1)
  gopdf.message("first page")
end)

gopdf.bind("<C-l>", function()
  gopdf.command(":reload-config")
end)

gopdf.unbind("j")
gopdf.unbind_mouse("wheel_down")

local function show_recent_files()
  local rows = gopdf.recent_files(20)

  if #rows == 0 then
    gopdf.message("no recent files")
    return
  end

  gopdf.ui.show({
    title = "Recent Files",
    rows = rows,
    on_select = function(_, path)
      gopdf.ui.close()
      gopdf.open(path)
    end,
  })
end

gopdf.bind("gr", show_recent_files)

local function shell_quote(s)
  return "'" .. s:gsub("'", "'\\''") .. "'"
end

local function list_dir(dir)
  local rows = {}
  local command = "find " .. shell_quote(dir) .. " -maxdepth 1 -mindepth 1 " ..
    '\\( -type d -printf "d:%f\\n" -o -type f -iname "*.pdf" -printf "f:%f\\n" \\)'
  local handle = io.popen(command)
  if not handle then
    return rows
  end
  for line in handle:lines() do
    local kind, name = line:match("^([df]):(.*)$")
    if kind == "d" then
      rows[#rows + 1] = name .. "/"
    elseif kind == "f" then
      rows[#rows + 1] = name
    end
  end
  handle:close()
  table.sort(rows)
  table.insert(rows, 1, "../")
  return rows
end

local function join_path(dir, name)
  if dir == "/" then
    return "/" .. name
  end
  return dir .. "/" .. name
end

local function parent_dir(dir)
  if dir == "/" then
    return "/"
  end
  return dir:match("^(.*)/[^/]+/?$") or "/"
end

local function show_file_browser(dir)
  gopdf.ui.show({
    title = "Open PDF: " .. dir,
    rows = list_dir(dir),
    on_select = function(_, name)
      if name == "../" then
        show_file_browser(parent_dir(dir))
        return
      end

      if name:sub(-1) == "/" then
        show_file_browser(join_path(dir, name:sub(1, -2)))
        return
      end

      gopdf.ui.close()
      gopdf.open(dir .. "/" .. name)
    end,
  })
end

gopdf.bind("fo", function()
  show_file_browser(os.getenv("HOME") or ".")
end)

gopdf.next_page()        gopdf.prev_page()
gopdf.scroll_down()      gopdf.scroll_up()
gopdf.scroll_left()      gopdf.scroll_right()
gopdf.next_spread()      gopdf.prev_spread()
gopdf.first_page()       gopdf.last_page()
gopdf.command_mode()     gopdf.goto_page_prompt()
gopdf.search_prompt()    gopdf.search_prompt_backward()
gopdf.search_next()      gopdf.search_prev()
gopdf.clear_search()     gopdf.close()
gopdf.toggle_dual_page() gopdf.toggle_render_mode()
gopdf.toggle_alt_colors()
gopdf.toggle_first_page_offset()
gopdf.toggle_status_bar()
gopdf.toggle_fullscreen()
gopdf.outline()          gopdf.confirm()
gopdf.zoom_in()          gopdf.zoom_out()
gopdf.reset_zoom()
gopdf.fit_width()        gopdf.fit_page()
gopdf.rotate_cw()        gopdf.rotate_ccw()
gopdf.jump_forward()     gopdf.jump_backward()
gopdf.pan()              gopdf.reload_config()
gopdf.show_completion()  gopdf.next_completion()
gopdf.prev_completion()
gopdf.open_file_picker() gopdf.keybinds()
gopdf.quit()

gopdf.cache.entries()       -- rendered pages in cache
gopdf.cache.pending()       -- pending renders
gopdf.cache.limit()         -- current cache entry limit
gopdf.cache.set_limit(n)    -- set cache entry limit
gopdf.cache.clear()         -- clear rendered page cache

if gopdf.document.page_count and gopdf.document.page_count > 200 then
  gopdf.options.dual_page = true
end