The Tor Browser: browser/metro/base/content/startui/TopSitesView.js@7e26c7da4463 (annotated)

browser/metro/base/content/startui/TopSitesView.js@7e26c7da4463 (annotated)

browser/metro/base/content/startui/TopSitesView.js

Wed, 31 Dec 2014 06:55:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:55:50 +0100
changeset 2: 7e26c7da4463
permissions: -rw-r--r--

Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2

 /* 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/. */
 "use strict"
 Cu.import("resource://gre/modules/PageThumbs.jsm");
 function TopSitesView(aGrid) {
   View.call(this, aGrid);
   // View monitors this for maximum tile display counts
   this.tilePrefName = "browser.display.startUI.topsites.maxresults";
   this.showing = this.maxTiles > 0 && !this.isFirstRun();
   // clean up state when the appbar closes
   StartUI.chromeWin.addEventListener('MozAppbarDismissing', this, false);
   let history = Cc["@mozilla.org/browser/nav-history-service;1"].
                 getService(Ci.nsINavHistoryService);
   history.addObserver(this, false);
   Services.obs.addObserver(this, "Metro:RefreshTopsiteThumbnail", false);
   NewTabUtils.allPages.register(this);
   TopSites.prepareCache().then(function(){
     this.populateGrid();
   }.bind(this));
 }
 TopSitesView.prototype = Util.extend(Object.create(View.prototype), {
   _set:null,
   // _lastSelectedSites used to temporarily store blocked/removed sites for undo/restore-ing
   _lastSelectedSites: null,
   // isUpdating used only for testing currently
   isUpdating: false,
   // For View's showing property
   get vbox() {
     return document.getElementById("start-topsites");
   },
   destruct: function destruct() {
     Services.obs.removeObserver(this, "Metro:RefreshTopsiteThumbnail");
     NewTabUtils.allPages.unregister(this);
     if (StartUI.chromeWin) {
       StartUI.chromeWin.removeEventListener('MozAppbarDismissing', this, false);
     }
     View.prototype.destruct.call(this);
   },
   handleItemClick: function tabview_handleItemClick(aItem) {
     let url = aItem.getAttribute("value");
     StartUI.goToURI(url);
   },
   doActionOnSelectedTiles: function(aActionName, aEvent) {
     let tileGroup = this._set;
     let selectedTiles = tileGroup.selectedItems;
     let sites = Array.map(selectedTiles, TopSites._linkFromNode);
     let nextContextActions = new Set();
     switch (aActionName){
       case "delete":
         for (let aNode of selectedTiles) {
           // add some class to transition element before deletion?
           aNode.contextActions.delete('delete');
           // we need new context buttons to show (the tile node will go away though)
         }
         this._lastSelectedSites = (this._lastSelectedSites || []).concat(sites);
         // stop the appbar from dismissing
         aEvent.preventDefault();
         nextContextActions.add('restore');
         TopSites.hideSites(sites);
         break;
       case "restore":
         // usually restore is an undo action, so we have to recreate the tiles and grid selection
         if (this._lastSelectedSites) {
           let selectedUrls = this._lastSelectedSites.map((site) => site.url);
           // re-select the tiles once the tileGroup is done populating and arranging
           tileGroup.addEventListener("arranged", function _onArranged(aEvent){
             for (let url of selectedUrls) {
               let tileNode = tileGroup.querySelector("richgriditem[value='"+url+"']");
               if (tileNode) {
                 tileNode.setAttribute("selected", true);
               }
             }
             tileGroup.removeEventListener("arranged", _onArranged, false);
             // <sfoster> we can't just call selectItem n times on tileGroup as selecting means trigger the default action
             // for seltype="single" grids.
             // so we toggle the attributes and raise the selectionchange "manually"
             let event = tileGroup.ownerDocument.createEvent("Events");
             event.initEvent("selectionchange", true, true);
             tileGroup.dispatchEvent(event);
           }, false);
           TopSites.restoreSites(this._lastSelectedSites);
           // stop the appbar from dismissing,
           // the selectionchange event will trigger re-population of the context appbar
           aEvent.preventDefault();
         }
         break;
       case "pin":
         let pinIndices = [];
         Array.forEach(selectedTiles, function(aNode) {
           pinIndices.push( Array.indexOf(aNode.control.items, aNode) );
           aNode.contextActions.delete('pin');
           aNode.contextActions.add('unpin');
         });
         TopSites.pinSites(sites, pinIndices);
         break;
       case "unpin":
         Array.forEach(selectedTiles, function(aNode) {
           aNode.contextActions.delete('unpin');
           aNode.contextActions.add('pin');
         });
         TopSites.unpinSites(sites);
         break;
       // default: no action
     }
     if (nextContextActions.size) {
       // at next tick, re-populate the context appbar
       setTimeout(function(){
         // fire a MozContextActionsChange event to update the context appbar
         let event = document.createEvent("Events");
         event.actions = [...nextContextActions];
         event.initEvent("MozContextActionsChange", true, false);
         tileGroup.dispatchEvent(event);
       },0);
     }
   },
   handleEvent: function(aEvent) {
     switch (aEvent.type){
       case "MozAppbarDismissing":
         // clean up when the context appbar is dismissed - we don't remember selections
         this._lastSelectedSites = null;
         break;
     }
   },
   update: function() {
     // called by the NewTabUtils.allPages.update, notifying us of data-change in topsites
     let grid = this._set,
         dirtySites = TopSites.dirty();
     if (dirtySites.size) {
       // we can just do a partial update and refresh the node representing each dirty tile
       for (let site of dirtySites) {
         let tileNode = grid.querySelector("[value='"+site.url+"']");
         if (tileNode) {
           this.updateTile(tileNode, new Site(site));
         }
       }
     } else {
         // flush, recreate all
       this.isUpdating = true;
       // destroy and recreate all item nodes, skip calling arrangeItems
       this.populateGrid();
     }
   },
   updateTile: function(aTileNode, aSite, aArrangeGrid) {
     if (!(aSite && aSite.url)) {
       throw new Error("Invalid Site object passed to TopSitesView updateTile");
     }
     this._updateFavicon(aTileNode, Util.makeURI(aSite.url));
     Task.spawn(function() {
       let filepath = PageThumbsStorage.getFilePathForURL(aSite.url);
       if (yield OS.File.exists(filepath)) {
         aSite.backgroundImage = 'url("'+PageThumbs.getThumbnailURL(aSite.url)+'")';
         // use the setter when available to update the backgroundImage value
         if ('backgroundImage' in aTileNode &&
             aTileNode.backgroundImage != aSite.backgroundImage) {
           aTileNode.backgroundImage = aSite.backgroundImage;
         } else {
           // just update the attribute for when the node gets the binding applied
           aTileNode.setAttribute("customImage", aSite.backgroundImage);
         }
       }
     });
     aSite.applyToTileNode(aTileNode);
     if (aTileNode.refresh) {
       aTileNode.refresh();
     }
     if (aArrangeGrid) {
       this._set.arrangeItems();
     }
   },
   populateGrid: function populateGrid() {
     this.isUpdating = true;
     let sites = TopSites.getSites();
     let tileset = this._set;
     tileset.clearAll(true);
     if (!this.maxTiles) {
       this.isUpdating = false;
       return;
     } else {
       sites = sites.slice(0, this.maxTiles);
     }
     for (let site of sites) {
       let slot = tileset.nextSlot();
       this.updateTile(slot, site);
     }
     tileset.arrangeItems();
     this.isUpdating = false;
   },
   forceReloadOfThumbnail: function forceReloadOfThumbnail(url) {
     let nodes = this._set.querySelectorAll('richgriditem[value="'+url+'"]');
     for (let item of nodes) {
       if ("isBound" in item && item.isBound) {
         item.refreshBackgroundImage();
       }
     }
   },
   isFirstRun: function isFirstRun() {
     return Services.prefs.getBoolPref("browser.firstrun.show.localepicker");
   },
   _adjustDOMforViewState: function _adjustDOMforViewState(aState) {
     if (!this._set)
       return;
     if (!aState)
       aState = this._set.getAttribute("viewstate");
     View.prototype._adjustDOMforViewState.call(this, aState);
     // Don't show thumbnails in snapped view.
     if (aState == "snapped") {
       document.getElementById("start-topsites-grid").removeAttribute("tiletype");
     } else {
       document.getElementById("start-topsites-grid").setAttribute("tiletype", "thumbnail");
     }
     // propogate tiletype changes down to tile children
     let tileType = this._set.getAttribute("tiletype");
     for (let item of this._set.children) {
       if (tileType) {
         item.setAttribute("tiletype", tileType);
       } else {
         item.removeAttribute("tiletype");
       }
     }
   },
   refreshView: function () {
     this.populateGrid();
   },
   // nsIObservers
   observe: function (aSubject, aTopic, aState) {
     switch (aTopic) {
       case "Metro:RefreshTopsiteThumbnail":
         this.forceReloadOfThumbnail(aState);
         break;
     }
     View.prototype.observe.call(this, aSubject, aTopic, aState);
     this.showing = this.maxTiles > 0 && !this.isFirstRun();
   },
   // nsINavHistoryObserver
   onBeginUpdateBatch: function() {
   },
   onEndUpdateBatch: function() {
   },
   onVisit: function(aURI, aVisitID, aTime, aSessionID,
                     aReferringID, aTransitionType) {
   },
   onTitleChanged: function(aURI, aPageTitle) {
   },
   onDeleteURI: function(aURI) {
   },
   onClearHistory: function() {
     if ('clearAll' in this._set)
       this._set.clearAll();
   },
   onPageChanged: function(aURI, aWhat, aValue) {
   },
   onDeleteVisits: function (aURI, aVisitTime, aGUID, aReason, aTransitionType) {
   },
   QueryInterface: function(iid) {
     if (iid.equals(Components.interfaces.nsINavHistoryObserver) ||
         iid.equals(Components.interfaces.nsISupports)) {
       return this;
     }
     throw Cr.NS_ERROR_NO_INTERFACE;
   }
 });
 let TopSitesStartView = {
   _view: null,
   get _grid() { return document.getElementById("start-topsites-grid"); },
   init: function init() {
     this._view = new TopSitesView(this._grid);
     this._grid.removeAttribute("fade");
   },
   uninit: function uninit() {
     if (this._view) {
       this._view.destruct();
     }
   },
 };