The Tor Browser: browser/metro/modules/View.jsm@7e26c7da4463

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     4 "use strict";

     6 this.EXPORTED_SYMBOLS = ["View"];

     8 Components.utils.import("resource://gre/modules/PlacesUtils.jsm");

     9 Components.utils.import("resource:///modules/colorUtils.jsm");

    10 Components.utils.import("resource://gre/modules/Services.jsm");

    11 Components.utils.import("resource://gre/modules/Task.jsm");

    13 // --------------------------------

    14 // module helpers

    15 //

    17 function makeURI(aURL, aOriginCharset, aBaseURI) {

    18   return Services.io.newURI(aURL, aOriginCharset, aBaseURI);

    19 }

    21 // --------------------------------

    24 // --------------------------------

    25 // View prototype for shared functionality

    27 function View(aSet) {

    28   this._set = aSet;

    29   this._set.controller = this;

    30   this._window = aSet.ownerDocument.defaultView;

    31   this._maxTiles = 8;

    32   this._tilePrefName = "unknown";

    34   this.onResize = () => this._adjustDOMforViewState();

    35   this._window.addEventListener("resize", this.onResize);

    37   ColorUtils.init();

    38   this._adjustDOMforViewState();

    39 }

    41 View.prototype = {

    42   set maxTiles(aVal) {

    43     this._maxTiles = aVal;

    44   },

    46   get maxTiles() {

    47     return this._maxTiles;

    48   },

    50   set showing(aFlag) {

    51     // 'vbox' must be defined on objects that inherit from us

    52     this.vbox.setAttribute("hidden", aFlag ? "false" : "true");

    53   },

    55   set tilePrefName(aStr) {

    56     // Should be called once on init by objects that inherit from us

    57     this._tilePrefName = aStr;

    58     this._maxTiles = Services.prefs.getIntPref(this._tilePrefName);

    59     Services.prefs.addObserver(this._tilePrefName, this, false);

    60   },

    62   destruct: function () {

    63     this._window.removeEventListener("resize", this.onResize);

    64     if (this._tilePrefName != "unknown") {

    65       Services.prefs.removeObserver(this._tilePrefName, this);

    66     }

    67   },

    69   _adjustDOMforViewState: function _adjustDOMforViewState(aState) {

    70     let grid = this._set;

    71     if (!grid) {

    72       return;

    73     }

    74     if (!aState) {

    75       aState = grid.getAttribute("viewstate");

    76     }

    77     switch (aState) {

    78       case "snapped":

    79         grid.setAttribute("nocontext", true);

    80         grid.selectNone();

    81         grid.disableCrossSlide();

    82         break;

    83       case "portrait":

    84         grid.removeAttribute("nocontext");

    85         grid.setAttribute("vertical", true);

    86         grid.enableCrossSlide();

    87         break;

    88       default:

    89         grid.removeAttribute("nocontext");

    90         grid.removeAttribute("vertical");

    91         grid.enableCrossSlide();

    92     }

    93     if ("arrangeItems" in grid) {

    94       grid.arrangeItems();

    95     }

    96   },

    98   _updateFavicon: function pv__updateFavicon(aItem, aUri) {

    99     if ("string" == typeof aUri) {

   100       aUri = makeURI(aUri);

   101     }

   102     PlacesUtils.favicons.getFaviconURLForPage(aUri, this._gotIcon.bind(this, aItem));

   103   },

   105   _gotIcon: function pv__gotIcon(aItem, aIconUri) {

   106     if (!aIconUri) {

   107       aItem.removeAttribute("iconURI");

   108       if (aItem.refresh) {

   109         aItem.refresh();

   110       }

   111       return;

   112     }

   113     if ("string" == typeof aIconUri) {

   114       aIconUri = makeURI(aIconUri);

   115     }

   116     let faviconURL = (PlacesUtils.favicons.getFaviconLinkForIcon(aIconUri)).spec;

   117     aItem.iconSrc = faviconURL;

   119     let xpFaviconURI = makeURI(faviconURL.replace("moz-anno:favicon:",""));

   120     Task.spawn(function() {

   121       let colorInfo = yield ColorUtils.getForegroundAndBackgroundIconColors(xpFaviconURI);

   122       if (!(colorInfo && colorInfo.background && colorInfo.foreground)) {

   123         return;

   124       }

   125       let { background, foreground } = colorInfo;

   126       aItem.style.color = foreground; //color text

   127       aItem.setAttribute("customColor", background);

   128       let matteColor =  0xffffff; // white

   129       let alpha = 0.04; // the tint weight

   130       let [,r,g,b] = background.match(/rgb\((\d+),(\d+),(\d+)/);

   131       // get the rgb value that represents this color at given opacity over a white matte

   132       let tintColor = ColorUtils.addRgbColors(matteColor, ColorUtils.createDecimalColorWord(r,g,b,alpha));

   133       aItem.setAttribute("tintColor", ColorUtils.convertDecimalToRgbColor(tintColor));

   134       // when bound, use the setter to propogate the color change through the tile

   135       if ('color' in aItem) {

   136         aItem.color = background;

   137       }

   138     });

   139   },

   141   refreshView: function () {

   142   },

   144   observe: function (aSubject, aTopic, aState) {

   145     switch (aTopic) {

   146       case "nsPref:changed": {

   147         if (aState == this._tilePrefName) {

   148           let count = Services.prefs.getIntPref(this._tilePrefName);

   149           this.maxTiles = count;

   150           this.showing = this.maxTiles > 0;

   151           this.refreshView();

   152         }

   153         break;

   154       }

   155     }

   156   }

   157 };

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