The Tor Browser: browser/base/content/newtab/page.js@6474c204b198 (annotated)

browser/base/content/newtab/page.js@6474c204b198 (annotated)

browser/base/content/newtab/page.js

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 #ifdef 0
 /* 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/. */
 #endif
 /**
  * This singleton represents the whole 'New Tab Page' and takes care of
  * initializing all its components.
  */
 let gPage = {
   /**
    * Initializes the page.
    */
   init: function Page_init() {
     // Add ourselves to the list of pages to receive notifications.
     gAllPages.register(this);
     // Listen for 'unload' to unregister this page.
     addEventListener("unload", this, false);
     // XXX bug 991111 - Not all click events are correctly triggered when
     // listening from xhtml nodes -- in particular middle clicks on sites, so
     // listen from the xul window and filter then delegate
     addEventListener("click", this, false);
     // Initialize sponsored panel
     this._sponsoredPanel = document.getElementById("sponsored-panel");
     let link = this._sponsoredPanel.querySelector(".text-link");
     link.addEventListener("click", () => this._sponsoredPanel.hidePopup());
     if (UpdateChannel.get().startsWith("release")) {
       document.getElementById("sponsored-panel-trial-descr").style.display = "none";
     }
     else {
       document.getElementById("sponsored-panel-release-descr").style.display = "none";
     }
     // Check if the new tab feature is enabled.
     let enabled = gAllPages.enabled;
     if (enabled)
       this._init();
     this._updateAttributes(enabled);
   },
   /**
    * True if the page is allowed to capture thumbnails using the background
    * thumbnail service.
    */
   get allowBackgroundCaptures() {
     // The preloader is bypassed altogether for private browsing windows, and
     // therefore allow-background-captures will not be set.  In that case, the
     // page is not preloaded and so it's visible, so allow background captures.
     return inPrivateBrowsingMode() ||
            document.documentElement.getAttribute("allow-background-captures") ==
            "true";
   },
   /**
    * Listens for notifications specific to this page.
    */
   observe: function Page_observe(aSubject, aTopic, aData) {
     if (aTopic == "nsPref:changed") {
       let enabled = gAllPages.enabled;
       this._updateAttributes(enabled);
       // Initialize the whole page if we haven't done that, yet.
       if (enabled) {
         this._init();
       } else {
         gUndoDialog.hide();
       }
     } else if (aTopic == "page-thumbnail:create" && gGrid.ready) {
       for (let site of gGrid.sites) {
         if (site && site.url === aData) {
           site.refreshThumbnail();
         }
       }
     }
   },
   /**
    * Updates the whole page and the grid when the storage has changed.
    * @param aOnlyIfHidden If true, the page is updated only if it's hidden in
    *                      the preloader.
    */
   update: function Page_update(aOnlyIfHidden=false) {
     let skipUpdate = aOnlyIfHidden && this.allowBackgroundCaptures;
     // The grid might not be ready yet as we initialize it asynchronously.
     if (gGrid.ready && !skipUpdate) {
       gGrid.refresh();
     }
   },
   /**
    * Shows sponsored panel
    */
   showSponsoredPanel: function Page_showSponsoredPanel(aTarget) {
     if (this._sponsoredPanel.state == "closed") {
       let self = this;
       this._sponsoredPanel.addEventListener("popuphidden", function onPopupHidden(aEvent) {
         self._sponsoredPanel.removeEventListener("popuphidden", onPopupHidden, false);
         aTarget.removeAttribute("panelShown");
       });
     }
     aTarget.setAttribute("panelShown", "true");
     this._sponsoredPanel.openPopup(aTarget);
   },
   /**
    * Internally initializes the page. This runs only when/if the feature
    * is/gets enabled.
    */
   _init: function Page_init() {
     if (this._initialized)
       return;
     this._initialized = true;
     gSearch.init();
     this._mutationObserver = new MutationObserver(() => {
       if (this.allowBackgroundCaptures) {
         Services.telemetry.getHistogramById("NEWTAB_PAGE_SHOWN").add(true);
         // Initialize type counting with the types we want to count
         let directoryCount = {};
         for (let type of DirectoryLinksProvider.linkTypes) {
           directoryCount[type] = 0;
         }
         for (let site of gGrid.sites) {
           if (site) {
             site.captureIfMissing();
             let {type} = site.link;
             if (type in directoryCount) {
               directoryCount[type]++;
             }
           }
         }
         // Record how many directory sites were shown, but place counts over the
         // default 9 in the same bucket
         for (let [type, count] of Iterator(directoryCount)) {
           let shownId = "NEWTAB_PAGE_DIRECTORY_" + type.toUpperCase() + "_SHOWN";
           let shownCount = Math.min(10, count);
           Services.telemetry.getHistogramById(shownId).add(shownCount);
         }
         // content.js isn't loaded for the page while it's in the preloader,
         // which is why this is necessary.
         gSearch.setUpInitialState();
       }
     });
     this._mutationObserver.observe(document.documentElement, {
       attributes: true,
       attributeFilter: ["allow-background-captures"],
     });
     gLinks.populateCache(function () {
       // Initialize and render the grid.
       gGrid.init();
       // Initialize the drop target shim.
       gDropTargetShim.init();
 #ifdef XP_MACOSX
       // Workaround to prevent a delay on MacOSX due to a slow drop animation.
       document.addEventListener("dragover", this, false);
       document.addEventListener("drop", this, false);
 #endif
     }.bind(this));
   },
   /**
    * Updates the 'page-disabled' attributes of the respective DOM nodes.
    * @param aValue Whether the New Tab Page is enabled or not.
    */
   _updateAttributes: function Page_updateAttributes(aValue) {
     // Set the nodes' states.
     let nodeSelector = "#newtab-scrollbox, #newtab-toggle, #newtab-grid, #newtab-search-container";
     for (let node of document.querySelectorAll(nodeSelector)) {
       if (aValue)
         node.removeAttribute("page-disabled");
       else
         node.setAttribute("page-disabled", "true");
     }
     // Enables/disables the control and link elements.
     let inputSelector = ".newtab-control, .newtab-link";
     for (let input of document.querySelectorAll(inputSelector)) {
       if (aValue)
         input.removeAttribute("tabindex");
       else
         input.setAttribute("tabindex", "-1");
     }
     // Update the toggle button's title.
     let toggle = document.getElementById("newtab-toggle");
     toggle.setAttribute("title", newTabString(aValue ? "hide" : "show"));
   },
   /**
    * Handles all page events.
    */
   handleEvent: function Page_handleEvent(aEvent) {
     switch (aEvent.type) {
       case "unload":
         if (this._mutationObserver)
           this._mutationObserver.disconnect();
         gAllPages.unregister(this);
         break;
       case "click":
         let {button, target} = aEvent;
         if (target.id == "newtab-toggle") {
           if (button == 0) {
             gAllPages.enabled = !gAllPages.enabled;
           }
           break;
         }
         // Go up ancestors until we find a Site or not
         while (target) {
           if (target.hasOwnProperty("_newtabSite")) {
             target._newtabSite.onClick(aEvent);
             break;
           }
           target = target.parentNode;
         }
         break;
       case "dragover":
         if (gDrag.isValid(aEvent) && gDrag.draggedSite)
           aEvent.preventDefault();
         break;
       case "drop":
         if (gDrag.isValid(aEvent) && gDrag.draggedSite) {
           aEvent.preventDefault();
           aEvent.stopPropagation();
         }
         break;
     }
   }
 };