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 /* -*- Mode: Javascript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

 /* vim: set ft=javascript ts=2 et sw=2 tw=80: */

 /* 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/. */

 const Ci = Components.interfaces;

 const Cu = Components.utils;

 Cu.import("resource://gre/modules/Services.jsm");

 Cu.import("resource://gre/modules/XPCOMUtils.jsm");

 Cu.import("resource:///modules/devtools/gDevTools.jsm");

 Cu.import("resource:///modules/devtools/FloatingScrollbars.jsm");

 Cu.import("resource://gre/modules/devtools/event-emitter.js");

 var require = Cu.import("resource://gre/modules/devtools/Loader.jsm", {}).devtools.require;

 let Telemetry = require("devtools/shared/telemetry");

 let {TouchEventHandler} = require("devtools/touch-events");

 this.EXPORTED_SYMBOLS = ["ResponsiveUIManager"];

 const MIN_WIDTH = 50;

 const MIN_HEIGHT = 50;

 const MAX_WIDTH = 10000;

 const MAX_HEIGHT = 10000;

 const SLOW_RATIO = 6;

 const ROUND_RATIO = 10;

 this.ResponsiveUIManager = {

   /**

    * Check if the a tab is in a responsive mode.

    * Leave the responsive mode if active,

    * active the responsive mode if not active.

    *

    * @param aWindow the main window.

    * @param aTab the tab targeted.

    */

   toggle: function(aWindow, aTab) {

     if (aTab.__responsiveUI) {

       aTab.__responsiveUI.close();

     } else {

       new ResponsiveUI(aWindow, aTab);

     }

   },

   /**

    * Returns true if responsive view is active for the provided tab.

    *

    * @param aTab the tab targeted.

    */

   isActiveForTab: function(aTab) {

     return !!aTab.__responsiveUI;

   },

   /**

    * Handle gcli commands.

    *

    * @param aWindow the browser window.

    * @param aTab the tab targeted.

    * @param aCommand the command name.

    * @param aArgs command arguments.

    */

   handleGcliCommand: function(aWindow, aTab, aCommand, aArgs) {

     switch (aCommand) {

       case "resize to":

         if (!aTab.__responsiveUI) {

           new ResponsiveUI(aWindow, aTab);

         }

         aTab.__responsiveUI.setSize(aArgs.width, aArgs.height);

         break;

       case "resize on":

         if (!aTab.__responsiveUI) {

           new ResponsiveUI(aWindow, aTab);

         }

         break;

       case "resize off":

         if (aTab.__responsiveUI) {

           aTab.__responsiveUI.close();

         }

         break;

       case "resize toggle":

           this.toggle(aWindow, aTab);

       default:

     }

   }

 }

 EventEmitter.decorate(ResponsiveUIManager);

 let presets = [

   // Phones

   {key: "320x480", width: 320, height: 480},    // iPhone, B2G, with <meta viewport>

   {key: "360x640", width: 360, height: 640},    // Android 4, phones, with <meta viewport>

   // Tablets

   {key: "768x1024", width: 768, height: 1024},   // iPad, with <meta viewport>

   {key: "800x1280", width: 800, height: 1280},   // Android 4, Tablet, with <meta viewport>

   // Default width for mobile browsers, no <meta viewport>

   {key: "980x1280", width: 980, height: 1280},

   // Computer

   {key: "1280x600", width: 1280, height: 600},

   {key: "1920x900", width: 1920, height: 900},

 ];

 function ResponsiveUI(aWindow, aTab)

 {

   this.mainWindow = aWindow;

   this.tab = aTab;

   this.tabContainer = aWindow.gBrowser.tabContainer;

   this.browser = aTab.linkedBrowser;

   this.chromeDoc = aWindow.document;

   this.container = aWindow.gBrowser.getBrowserContainer(this.browser);

   this.stack = this.container.querySelector(".browserStack");

   this._telemetry = new Telemetry();

   this._floatingScrollbars = !this.mainWindow.matchMedia("(-moz-overlay-scrollbars)").matches;

   // Try to load presets from prefs

   if (Services.prefs.prefHasUserValue("devtools.responsiveUI.presets")) {

     try {

       presets = JSON.parse(Services.prefs.getCharPref("devtools.responsiveUI.presets"));

     } catch(e) {

       // User pref is malformated.

       Cu.reportError("Could not parse pref `devtools.responsiveUI.presets`: " + e);

     }

   }

   this.customPreset = {key: "custom", custom: true};

   if (Array.isArray(presets)) {

     this.presets = [this.customPreset].concat(presets);

   } else {

     Cu.reportError("Presets value (devtools.responsiveUI.presets) is malformated.");

     this.presets = [this.customPreset];

   }

   try {

     let width = Services.prefs.getIntPref("devtools.responsiveUI.customWidth");

     let height = Services.prefs.getIntPref("devtools.responsiveUI.customHeight");

     this.customPreset.width = Math.min(MAX_WIDTH, width);

     this.customPreset.height = Math.min(MAX_HEIGHT, height);

     this.currentPresetKey = Services.prefs.getCharPref("devtools.responsiveUI.currentPreset");

   } catch(e) {

     // Default size. The first preset (custom) is the one that will be used.

     let bbox = this.stack.getBoundingClientRect();

     this.customPreset.width = bbox.width - 40; // horizontal padding of the container

     this.customPreset.height = bbox.height - 80; // vertical padding + toolbar height

     this.currentPresetKey = this.presets[1].key; // most common preset

   }

   this.container.setAttribute("responsivemode", "true");

   this.stack.setAttribute("responsivemode", "true");

   // Let's bind some callbacks.

   this.bound_onPageLoad = this.onPageLoad.bind(this);

   this.bound_onPageUnload = this.onPageUnload.bind(this);

   this.bound_presetSelected = this.presetSelected.bind(this);

   this.bound_addPreset = this.addPreset.bind(this);

   this.bound_removePreset = this.removePreset.bind(this);

   this.bound_rotate = this.rotate.bind(this);

   this.bound_screenshot = () => this.screenshot();

   this.bound_touch = this.toggleTouch.bind(this);

   this.bound_close = this.close.bind(this);

   this.bound_startResizing = this.startResizing.bind(this);

   this.bound_stopResizing = this.stopResizing.bind(this);

   this.bound_onDrag = this.onDrag.bind(this);

   this.bound_onKeypress = this.onKeypress.bind(this);

   // Events

   this.tab.addEventListener("TabClose", this);

   this.tabContainer.addEventListener("TabSelect", this);

   this.mainWindow.document.addEventListener("keypress", this.bound_onKeypress, false);

   this.buildUI();

   this.checkMenus();

   this.docShell = this.browser.contentWindow.QueryInterface(Ci.nsIInterfaceRequestor)

                       .getInterface(Ci.nsIWebNavigation)

                       .QueryInterface(Ci.nsIDocShell);

   this._deviceSizeWasPageSize = this.docShell.deviceSizeIsPageSize;

   this.docShell.deviceSizeIsPageSize = true;

   try {

     if (Services.prefs.getBoolPref("devtools.responsiveUI.rotate")) {

       this.rotate();

     }

   } catch(e) {}

   if (this._floatingScrollbars)

     switchToFloatingScrollbars(this.tab);

   this.tab.__responsiveUI = this;

   this._telemetry.toolOpened("responsive");

   // Touch events support

   this.touchEnableBefore = false;

   this.touchEventHandler = new TouchEventHandler(this.browser);

   this.browser.addEventListener("load", this.bound_onPageLoad, true);

   this.browser.addEventListener("unload", this.bound_onPageUnload, true);

   if (this.browser.contentWindow.document &&

       this.browser.contentWindow.document.readyState == "complete") {

     this.onPageLoad();

   }

   ResponsiveUIManager.emit("on", this.tab, this);

 }

 ResponsiveUI.prototype = {

   _transitionsEnabled: true,

   get transitionsEnabled() this._transitionsEnabled,

   set transitionsEnabled(aValue) {

     this._transitionsEnabled = aValue;

     if (aValue && !this._resizing && this.stack.hasAttribute("responsivemode")) {

       this.stack.removeAttribute("notransition");

     } else if (!aValue) {

       this.stack.setAttribute("notransition", "true");

     }

   },

   /**

    * Window onload / onunload

    */

    onPageLoad: function() {

      this.touchEventHandler = new TouchEventHandler(this.browser);

      if (this.touchEnableBefore) {

        this.enableTouch();

      }

    },

    onPageUnload: function(evt) {

      // Ignore sub frames unload events

      if (evt.target != this.browser.contentDocument)

        return;

      if (this.closing)

        return;

      if (this.touchEventHandler) {

        this.touchEnableBefore = this.touchEventHandler.enabled;

        this.disableTouch();

        delete this.touchEventHandler;

      }

    },

   /**

    * Destroy the nodes. Remove listeners. Reset the style.

    */

   close: function RUI_unload() {

     if (this.closing)

       return;

     this.closing = true;

     this.docShell.deviceSizeIsPageSize = this._deviceSizeWasPageSize;

     this.browser.removeEventListener("load", this.bound_onPageLoad, true);

     this.browser.removeEventListener("unload", this.bound_onPageUnload, true);

     if (this._floatingScrollbars)

       switchToNativeScrollbars(this.tab);

     this.unCheckMenus();

     // Reset style of the stack.

     let style = "max-width: none;" +

                 "min-width: 0;" +

                 "max-height: none;" +

                 "min-height: 0;";

     this.stack.setAttribute("style", style);

     if (this.isResizing)

       this.stopResizing();

     // Remove listeners.

     this.mainWindow.document.removeEventListener("keypress", this.bound_onKeypress, false);

     this.menulist.removeEventListener("select", this.bound_presetSelected, true);

     this.tab.removeEventListener("TabClose", this);

     this.tabContainer.removeEventListener("TabSelect", this);

     this.rotatebutton.removeEventListener("command", this.bound_rotate, true);

     this.screenshotbutton.removeEventListener("command", this.bound_screenshot, true);

     this.touchbutton.removeEventListener("command", this.bound_touch, true);

     this.closebutton.removeEventListener("command", this.bound_close, true);

     this.addbutton.removeEventListener("command", this.bound_addPreset, true);

     this.removebutton.removeEventListener("command", this.bound_removePreset, true);

     // Removed elements.

     this.container.removeChild(this.toolbar);

     this.stack.removeChild(this.resizer);

     this.stack.removeChild(this.resizeBarV);

     this.stack.removeChild(this.resizeBarH);

     // Unset the responsive mode.

     this.container.removeAttribute("responsivemode");

     this.stack.removeAttribute("responsivemode");

     delete this.docShell;

     delete this.tab.__responsiveUI;

     if (this.touchEventHandler)

       this.touchEventHandler.stop();

     this._telemetry.toolClosed("responsive");

     ResponsiveUIManager.emit("off", this.tab, this);

   },

   /**

    * Handle keypressed.

    *

    * @param aEvent

    */

   onKeypress: function RUI_onKeypress(aEvent) {

     if (aEvent.keyCode == this.mainWindow.KeyEvent.DOM_VK_ESCAPE &&

         this.mainWindow.gBrowser.selectedBrowser == this.browser) {

       aEvent.preventDefault();

       aEvent.stopPropagation();

       this.close();

     }

   },

   /**

    * Handle events

    */

   handleEvent: function (aEvent) {

     switch (aEvent.type) {

       case "TabClose":

         this.close();

         break;

       case "TabSelect":

         if (this.tab.selected) {

           this.checkMenus();

         } else if (!this.mainWindow.gBrowser.selectedTab.responsiveUI) {

           this.unCheckMenus();

         }

         break;

     }

   },

   /**

    * Check the menu items.

    */

    checkMenus: function RUI_checkMenus() {

      this.chromeDoc.getElementById("Tools:ResponsiveUI").setAttribute("checked", "true");

    },

   /**

    * Uncheck the menu items.

    */

    unCheckMenus: function RUI_unCheckMenus() {

      this.chromeDoc.getElementById("Tools:ResponsiveUI").setAttribute("checked", "false");

    },

   /**

    * Build the toolbar and the resizers.

    *

    * <vbox class="browserContainer"> From tabbrowser.xml

    *  <toolbar class="devtools-responsiveui-toolbar">

    *    <menulist class="devtools-responsiveui-menulist"/> // presets

    *    <toolbarbutton tabindex="0" class="devtools-responsiveui-toolbarbutton" tooltiptext="rotate"/> // rotate

    *    <toolbarbutton tabindex="0" class="devtools-responsiveui-toolbarbutton" tooltiptext="screenshot"/> // screenshot

    *    <toolbarbutton tabindex="0" class="devtools-responsiveui-toolbarbutton" tooltiptext="Leave Responsive Design View"/> // close

    *  </toolbar>

    *  <stack class="browserStack"> From tabbrowser.xml

    *    <browser/>

    *    <box class="devtools-responsiveui-resizehandle" bottom="0" right="0"/>

    *    <box class="devtools-responsiveui-resizebarV" top="0" right="0"/>

    *    <box class="devtools-responsiveui-resizebarH" bottom="0" left="0"/>

    *  </stack>

    * </vbox>

    */

   buildUI: function RUI_buildUI() {

     // Toolbar

     this.toolbar = this.chromeDoc.createElement("toolbar");

     this.toolbar.className = "devtools-responsiveui-toolbar";

     this.menulist = this.chromeDoc.createElement("menulist");

     this.menulist.className = "devtools-responsiveui-menulist";

     this.menulist.addEventListener("select", this.bound_presetSelected, true);

     this.menuitems = new Map();

     let menupopup = this.chromeDoc.createElement("menupopup");

     this.registerPresets(menupopup);

     this.menulist.appendChild(menupopup);

     this.addbutton = this.chromeDoc.createElement("menuitem");

     this.addbutton.setAttribute("label", this.strings.GetStringFromName("responsiveUI.addPreset"));

     this.addbutton.addEventListener("command", this.bound_addPreset, true);

     this.removebutton = this.chromeDoc.createElement("menuitem");

     this.removebutton.setAttribute("label", this.strings.GetStringFromName("responsiveUI.removePreset"));

     this.removebutton.addEventListener("command", this.bound_removePreset, true);

     menupopup.appendChild(this.chromeDoc.createElement("menuseparator"));

     menupopup.appendChild(this.addbutton);

     menupopup.appendChild(this.removebutton);

     this.rotatebutton = this.chromeDoc.createElement("toolbarbutton");

     this.rotatebutton.setAttribute("tabindex", "0");

     this.rotatebutton.setAttribute("tooltiptext", this.strings.GetStringFromName("responsiveUI.rotate2"));

     this.rotatebutton.className = "devtools-responsiveui-toolbarbutton devtools-responsiveui-rotate";

     this.rotatebutton.addEventListener("command", this.bound_rotate, true);

     this.screenshotbutton = this.chromeDoc.createElement("toolbarbutton");

     this.screenshotbutton.setAttribute("tabindex", "0");

     this.screenshotbutton.setAttribute("tooltiptext", this.strings.GetStringFromName("responsiveUI.screenshot"));

     this.screenshotbutton.className = "devtools-responsiveui-toolbarbutton devtools-responsiveui-screenshot";

     this.screenshotbutton.addEventListener("command", this.bound_screenshot, true);

     this.touchbutton = this.chromeDoc.createElement("toolbarbutton");

     this.touchbutton.setAttribute("tabindex", "0");

     this.touchbutton.setAttribute("tooltiptext", this.strings.GetStringFromName("responsiveUI.touch"));

     this.touchbutton.className = "devtools-responsiveui-toolbarbutton devtools-responsiveui-touch";

     this.touchbutton.addEventListener("command", this.bound_touch, true);

     this.closebutton = this.chromeDoc.createElement("toolbarbutton");

     this.closebutton.setAttribute("tabindex", "0");

     this.closebutton.className = "devtools-responsiveui-toolbarbutton devtools-responsiveui-close";

     this.closebutton.setAttribute("tooltiptext", this.strings.GetStringFromName("responsiveUI.close"));

     this.closebutton.addEventListener("command", this.bound_close, true);

     this.toolbar.appendChild(this.closebutton);

     this.toolbar.appendChild(this.menulist);

     this.toolbar.appendChild(this.rotatebutton);

     this.toolbar.appendChild(this.touchbutton);

     this.toolbar.appendChild(this.screenshotbutton);

     // Resizers

     let resizerTooltip = this.strings.GetStringFromName("responsiveUI.resizerTooltip");

     this.resizer = this.chromeDoc.createElement("box");

     this.resizer.className = "devtools-responsiveui-resizehandle";

     this.resizer.setAttribute("right", "0");

     this.resizer.setAttribute("bottom", "0");

     this.resizer.setAttribute("tooltiptext", resizerTooltip);

     this.resizer.onmousedown = this.bound_startResizing;

     this.resizeBarV =  this.chromeDoc.createElement("box");

     this.resizeBarV.className = "devtools-responsiveui-resizebarV";

     this.resizeBarV.setAttribute("top", "0");

     this.resizeBarV.setAttribute("right", "0");

     this.resizeBarV.setAttribute("tooltiptext", resizerTooltip);

     this.resizeBarV.onmousedown = this.bound_startResizing;

     this.resizeBarH =  this.chromeDoc.createElement("box");

     this.resizeBarH.className = "devtools-responsiveui-resizebarH";

     this.resizeBarH.setAttribute("bottom", "0");

     this.resizeBarH.setAttribute("left", "0");

     this.resizeBarH.setAttribute("tooltiptext", resizerTooltip);

     this.resizeBarH.onmousedown = this.bound_startResizing;

     this.container.insertBefore(this.toolbar, this.stack);

     this.stack.appendChild(this.resizer);

     this.stack.appendChild(this.resizeBarV);

     this.stack.appendChild(this.resizeBarH);

   },

   /**

    * Build the presets list and append it to the menupopup.

    *

    * @param aParent menupopup.

    */

   registerPresets: function RUI_registerPresets(aParent) {

     let fragment = this.chromeDoc.createDocumentFragment();

     let doc = this.chromeDoc;

     for (let preset of this.presets) {

       let menuitem = doc.createElement("menuitem");

       menuitem.setAttribute("ispreset", true);

       this.menuitems.set(menuitem, preset);

       if (preset.key === this.currentPresetKey) {

         menuitem.setAttribute("selected", "true");

         this.selectedItem = menuitem;

       }

       if (preset.custom)

         this.customMenuitem = menuitem;

       this.setMenuLabel(menuitem, preset);

       fragment.appendChild(menuitem);

     }

     aParent.appendChild(fragment);

   },

   /**

    * Set the menuitem label of a preset.

    *

    * @param aMenuitem menuitem to edit.

    * @param aPreset associated preset.

    */

   setMenuLabel: function RUI_setMenuLabel(aMenuitem, aPreset) {

     let size = Math.round(aPreset.width) + "x" + Math.round(aPreset.height);

     if (aPreset.custom) {

       let str = this.strings.formatStringFromName("responsiveUI.customResolution", [size], 1);

       aMenuitem.setAttribute("label", str);

     } else if (aPreset.name != null && aPreset.name !== "") {

       let str = this.strings.formatStringFromName("responsiveUI.namedResolution", [size, aPreset.name], 2);

       aMenuitem.setAttribute("label", str);

     } else {

       aMenuitem.setAttribute("label", size);

     }

   },

   /**

    * When a preset is selected, apply it.

    */

   presetSelected: function RUI_presetSelected() {

     if (this.menulist.selectedItem.getAttribute("ispreset") === "true") {

       this.selectedItem = this.menulist.selectedItem;

       this.rotateValue = false;

       let selectedPreset = this.menuitems.get(this.selectedItem);

       this.loadPreset(selectedPreset);

       this.currentPresetKey = selectedPreset.key;

       this.saveCurrentPreset();

       // Update the buttons hidden status according to the new selected preset

       if (selectedPreset == this.customPreset) {

         this.addbutton.hidden = false;

         this.removebutton.hidden = true;

       } else {

         this.addbutton.hidden = true;

         this.removebutton.hidden = false;

       }

     }

   },

   /**

    * Apply a preset.

    *

    * @param aPreset preset to apply.

    */

   loadPreset: function RUI_loadPreset(aPreset) {

     this.setSize(aPreset.width, aPreset.height);

   },

   /**

    * Add a preset to the list and the memory

    */

   addPreset: function RUI_addPreset() {

     let w = this.customPreset.width;

     let h = this.customPreset.height;

     let newName = {};

     let title = this.strings.GetStringFromName("responsiveUI.customNamePromptTitle");

     let message = this.strings.formatStringFromName("responsiveUI.customNamePromptMsg", [w, h], 2);

     let promptOk = Services.prompt.prompt(null, title, message, newName, null, {});

     if (!promptOk) {

       // Prompt has been cancelled

       let menuitem = this.customMenuitem;

       this.menulist.selectedItem = menuitem;

       this.currentPresetKey = this.customPreset.key;

       return;

     }

     let newPreset = {

       key: w + "x" + h,

       name: newName.value,

       width: w,

       height: h

     };

     this.presets.push(newPreset);

     // Sort the presets according to width/height ascending order

     this.presets.sort(function RUI_sortPresets(aPresetA, aPresetB) {

       // We keep custom preset at first

       if (aPresetA.custom && !aPresetB.custom) {

         return 1;

       }

       if (!aPresetA.custom && aPresetB.custom) {

         return -1;

       }

       if (aPresetA.width === aPresetB.width) {

         if (aPresetA.height === aPresetB.height) {

           return 0;

         } else {

           return aPresetA.height > aPresetB.height;

         }

       } else {

         return aPresetA.width > aPresetB.width;

       }

     });

     this.savePresets();

     let newMenuitem = this.chromeDoc.createElement("menuitem");

     newMenuitem.setAttribute("ispreset", true);

     this.setMenuLabel(newMenuitem, newPreset);

     this.menuitems.set(newMenuitem, newPreset);

     let idx = this.presets.indexOf(newPreset);

     let beforeMenuitem = this.menulist.firstChild.childNodes[idx + 1];

     this.menulist.firstChild.insertBefore(newMenuitem, beforeMenuitem);

     this.menulist.selectedItem = newMenuitem;

     this.currentPresetKey = newPreset.key;

     this.saveCurrentPreset();

   },

   /**

    * remove a preset from the list and the memory

    */

   removePreset: function RUI_removePreset() {

     let selectedPreset = this.menuitems.get(this.selectedItem);

     let w = selectedPreset.width;

     let h = selectedPreset.height;

     this.presets.splice(this.presets.indexOf(selectedPreset), 1);

     this.menulist.firstChild.removeChild(this.selectedItem);

     this.menuitems.delete(this.selectedItem);

     this.customPreset.width = w;

     this.customPreset.height = h;

     let menuitem = this.customMenuitem;

     this.setMenuLabel(menuitem, this.customPreset);

     this.menulist.selectedItem = menuitem;

     this.currentPresetKey = this.customPreset.key;

     this.setSize(w, h);

     this.savePresets();

   },

   /**

    * Swap width and height.

    */

   rotate: function RUI_rotate() {

     let selectedPreset = this.menuitems.get(this.selectedItem);

     let width = this.rotateValue ? selectedPreset.height : selectedPreset.width;

     let height = this.rotateValue ? selectedPreset.width : selectedPreset.height;

     this.setSize(height, width);

     if (selectedPreset.custom) {

       this.saveCustomSize();

     } else {

       this.rotateValue = !this.rotateValue;

       this.saveCurrentPreset();

     }

   },

   /**

    * Take a screenshot of the page.

    *

    * @param aFileName name of the screenshot file (used for tests).

    */

   screenshot: function RUI_screenshot(aFileName) {

     let window = this.browser.contentWindow;

     let document = window.document;

     let canvas = this.chromeDoc.createElementNS("http://www.w3.org/1999/xhtml", "canvas");

     let width = window.innerWidth;

     let height = window.innerHeight;

     canvas.width = width;

     canvas.height = height;

     let ctx = canvas.getContext("2d");

     ctx.drawWindow(window, window.scrollX, window.scrollY, width, height, "#fff");

     let filename = aFileName;

     if (!filename) {

       let date = new Date();

       let month = ("0" + (date.getMonth() + 1)).substr(-2, 2);

       let day = ("0" + (date.getDay() + 1)).substr(-2, 2);

       let dateString = [date.getFullYear(), month, day].join("-");

       let timeString = date.toTimeString().replace(/:/g, ".").split(" ")[0];

       filename = this.strings.formatStringFromName("responsiveUI.screenshotGeneratedFilename", [dateString, timeString], 2);

     }

     canvas.toBlob(blob => {

       let chromeWindow = this.chromeDoc.defaultView;

       let url = chromeWindow.URL.createObjectURL(blob);

       chromeWindow.saveURL(url, filename + ".png", null, true, true, document.documentURIObject, document);

     });

   },

   /**

    * Enable/Disable mouse -> touch events translation.

    */

    enableTouch: function RUI_enableTouch() {

      if (!this.touchEventHandler.enabled) {

        let isReloadNeeded = this.touchEventHandler.start();

        this.touchbutton.setAttribute("checked", "true");

        return isReloadNeeded;

      }

      return false;

    },

    disableTouch: function RUI_disableTouch() {

      if (this.touchEventHandler.enabled) {

        this.touchEventHandler.stop();

        this.touchbutton.removeAttribute("checked");

      }

    },

    hideTouchNotification: function RUI_hideTouchNotification() {

      let nbox = this.mainWindow.gBrowser.getNotificationBox(this.browser);

      let n = nbox.getNotificationWithValue("responsive-ui-need-reload");

      if (n) {

        n.close();

      }

    },

    toggleTouch: function RUI_toggleTouch() {

      this.hideTouchNotification();

      if (this.touchEventHandler.enabled) {

        this.disableTouch();

      } else {

        let isReloadNeeded = this.enableTouch();

        if (isReloadNeeded) {

          if (Services.prefs.getBoolPref("devtools.responsiveUI.no-reload-notification")) {

            return;

          }

          let nbox = this.mainWindow.gBrowser.getNotificationBox(this.browser);

          var buttons = [{

            label: this.strings.GetStringFromName("responsiveUI.notificationReload"),

            callback: () => {

              this.browser.reload();

            },

            accessKey: this.strings.GetStringFromName("responsiveUI.notificationReload_accesskey"),

          }, {

            label: this.strings.GetStringFromName("responsiveUI.dontShowReloadNotification"),

            callback: function() {

              Services.prefs.setBoolPref("devtools.responsiveUI.no-reload-notification", true);

            },

            accessKey: this.strings.GetStringFromName("responsiveUI.dontShowReloadNotification_accesskey"),

          }];

          nbox.appendNotification(

            this.strings.GetStringFromName("responsiveUI.needReload"),

            "responsive-ui-need-reload",

            null,

            nbox.PRIORITY_INFO_LOW,

            buttons);

        }

      }

    },

   /**

    * Change the size of the browser.

    *

    * @param aWidth width of the browser.

    * @param aHeight height of the browser.

    */

   setSize: function RUI_setSize(aWidth, aHeight) {

     aWidth = Math.min(Math.max(aWidth, MIN_WIDTH), MAX_WIDTH);

     aHeight = Math.min(Math.max(aHeight, MIN_HEIGHT), MAX_HEIGHT);

     // We resize the containing stack.

     let style = "max-width: %width;" +

                 "min-width: %width;" +

                 "max-height: %height;" +

                 "min-height: %height;";

     style = style.replace(/%width/g, aWidth + "px");

     style = style.replace(/%height/g, aHeight + "px");

     this.stack.setAttribute("style", style);

     if (!this.ignoreY)

       this.resizeBarV.setAttribute("top", Math.round(aHeight / 2));

     if (!this.ignoreX)

       this.resizeBarH.setAttribute("left", Math.round(aWidth / 2));

     let selectedPreset = this.menuitems.get(this.selectedItem);

     // We uptate the custom menuitem if we are using it

     if (selectedPreset.custom) {

       selectedPreset.width = aWidth;

       selectedPreset.height = aHeight;

       this.setMenuLabel(this.selectedItem, selectedPreset);

     }

   },

   /**

    * Start the process of resizing the browser.

    *

    * @param aEvent

    */

   startResizing: function RUI_startResizing(aEvent) {

     let selectedPreset = this.menuitems.get(this.selectedItem);

     if (!selectedPreset.custom) {

       this.customPreset.width = this.rotateValue ? selectedPreset.height : selectedPreset.width;

       this.customPreset.height = this.rotateValue ? selectedPreset.width : selectedPreset.height;

       let menuitem = this.customMenuitem;

       this.setMenuLabel(menuitem, this.customPreset);

       this.currentPresetKey = this.customPreset.key;

       this.menulist.selectedItem = menuitem;

     }

     this.mainWindow.addEventListener("mouseup", this.bound_stopResizing, true);

     this.mainWindow.addEventListener("mousemove", this.bound_onDrag, true);

     this.container.style.pointerEvents = "none";

     this._resizing = true;

     this.stack.setAttribute("notransition", "true");

     this.lastScreenX = aEvent.screenX;

     this.lastScreenY = aEvent.screenY;

     this.ignoreY = (aEvent.target === this.resizeBarV);

     this.ignoreX = (aEvent.target === this.resizeBarH);

     this.isResizing = true;

   },

   /**

    * Resizing on mouse move.

    *

    * @param aEvent

    */

   onDrag: function RUI_onDrag(aEvent) {

     let shift = aEvent.shiftKey;

     let ctrl = !aEvent.shiftKey && aEvent.ctrlKey;

     let screenX = aEvent.screenX;

     let screenY = aEvent.screenY;

     let deltaX = screenX - this.lastScreenX;

     let deltaY = screenY - this.lastScreenY;

     if (this.ignoreY)

       deltaY = 0;

     if (this.ignoreX)

       deltaX = 0;

     if (ctrl) {

       deltaX /= SLOW_RATIO;

       deltaY /= SLOW_RATIO;

     }

     let width = this.customPreset.width + deltaX;

     let height = this.customPreset.height + deltaY;

     if (shift) {

       let roundedWidth, roundedHeight;

       roundedWidth = 10 * Math.floor(width / ROUND_RATIO);

       roundedHeight = 10 * Math.floor(height / ROUND_RATIO);

       screenX += roundedWidth - width;

       screenY += roundedHeight - height;

       width = roundedWidth;

       height = roundedHeight;

     }

     if (width < MIN_WIDTH) {

         width = MIN_WIDTH;

     } else {

         this.lastScreenX = screenX;

     }

     if (height < MIN_HEIGHT) {

         height = MIN_HEIGHT;

     } else {

         this.lastScreenY = screenY;

     }

     this.setSize(width, height);

   },

   /**

    * Stop End resizing

    */

   stopResizing: function RUI_stopResizing() {

     this.container.style.pointerEvents = "auto";

     this.mainWindow.removeEventListener("mouseup", this.bound_stopResizing, true);

     this.mainWindow.removeEventListener("mousemove", this.bound_onDrag, true);

     this.saveCustomSize();

     delete this._resizing;

     if (this.transitionsEnabled) {

       this.stack.removeAttribute("notransition");

     }

     this.ignoreY = false;

     this.ignoreX = false;

     this.isResizing = false;

   },

   /**

    * Store the custom size as a pref.

    */

    saveCustomSize: function RUI_saveCustomSize() {

      Services.prefs.setIntPref("devtools.responsiveUI.customWidth", this.customPreset.width);

      Services.prefs.setIntPref("devtools.responsiveUI.customHeight", this.customPreset.height);

    },

   /**

    * Store the current preset as a pref.

    */

    saveCurrentPreset: function RUI_saveCurrentPreset() {

      Services.prefs.setCharPref("devtools.responsiveUI.currentPreset", this.currentPresetKey);

      Services.prefs.setBoolPref("devtools.responsiveUI.rotate", this.rotateValue);

    },

   /**

    * Store the list of all registered presets as a pref.

    */

   savePresets: function RUI_savePresets() {

     // We exclude the custom one

     let registeredPresets = this.presets.filter(function (aPreset) {

       return !aPreset.custom;

     });

     Services.prefs.setCharPref("devtools.responsiveUI.presets", JSON.stringify(registeredPresets));

   },

 }

 XPCOMUtils.defineLazyGetter(ResponsiveUI.prototype, "strings", function () {

   return Services.strings.createBundle("chrome://browser/locale/devtools/responsiveUI.properties");

 });