The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/browser/components/sessionstore/src/PageStyle.jsm	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,127 @@
     1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
     1.5 +* License, v. 2.0. If a copy of the MPL was not distributed with this file,
     1.6 +* You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.7 +
     1.8 +"use strict";
     1.9 +
    1.10 +this.EXPORTED_SYMBOLS = ["PageStyle"];
    1.11 +
    1.12 +const Ci = Components.interfaces;
    1.13 +
    1.14 +/**
    1.15 + * The external API exported by this module.
    1.16 + */
    1.17 +this.PageStyle = Object.freeze({
    1.18 +  collect: function (docShell, frameTree) {
    1.19 +    return PageStyleInternal.collect(docShell, frameTree);
    1.20 +  },
    1.21 +
    1.22 +  restore: function (docShell, frameList, pageStyle) {
    1.23 +    PageStyleInternal.restore(docShell, frameList, pageStyle);
    1.24 +  },
    1.25 +
    1.26 +  restoreTree: function (docShell, data) {
    1.27 +    PageStyleInternal.restoreTree(docShell, data);
    1.28 +  }
    1.29 +});
    1.30 +
    1.31 +// Signifies that author style level is disabled for the page.
    1.32 +const NO_STYLE = "_nostyle";
    1.33 +
    1.34 +let PageStyleInternal = {
    1.35 +  /**
    1.36 +   * Collects the selected style sheet sets for all reachable frames.
    1.37 +   */
    1.38 +  collect: function (docShell, frameTree) {
    1.39 +    let result = frameTree.map(({document: doc}) => {
    1.40 +      let style;
    1.41 +
    1.42 +      if (doc) {
    1.43 +        // http://dev.w3.org/csswg/cssom/#persisting-the-selected-css-style-sheet-set
    1.44 +        style = doc.selectedStyleSheetSet || doc.lastStyleSheetSet;
    1.45 +      }
    1.46 +
    1.47 +      return style ? {pageStyle: style} : null;
    1.48 +    });
    1.49 +
    1.50 +    let markupDocumentViewer =
    1.51 +      docShell.contentViewer.QueryInterface(Ci.nsIMarkupDocumentViewer);
    1.52 +
    1.53 +    if (markupDocumentViewer.authorStyleDisabled) {
    1.54 +      result = result || {};
    1.55 +      result.disabled = true;
    1.56 +    }
    1.57 +
    1.58 +    return result && Object.keys(result).length ? result : null;
    1.59 +  },
    1.60 +
    1.61 +  /**
    1.62 +   * Restore the selected style sheet of all the frames in frameList
    1.63 +   * to match |pageStyle|.
    1.64 +   * @param docShell the root docshell of all the frames
    1.65 +   * @param frameList a list of [frame, data] pairs, where frame is a
    1.66 +   * DOM window and data is the session restore data associated with
    1.67 +   * it.
    1.68 +   * @param pageStyle the title of the style sheet to apply
    1.69 +   */
    1.70 +  restore: function (docShell, frameList, pageStyle) {
    1.71 +    let disabled = pageStyle == NO_STYLE;
    1.72 +
    1.73 +    let markupDocumentViewer =
    1.74 +      docShell.contentViewer.QueryInterface(Ci.nsIMarkupDocumentViewer);
    1.75 +    markupDocumentViewer.authorStyleDisabled = disabled;
    1.76 +
    1.77 +    for (let [frame, data] of frameList) {
    1.78 +      Array.forEach(frame.document.styleSheets, function(aSS) {
    1.79 +        aSS.disabled = aSS.title && aSS.title != pageStyle;
    1.80 +      });
    1.81 +    }
    1.82 +  },
    1.83 +
    1.84 +  /**
    1.85 +   * Restores pageStyle data for the current frame hierarchy starting at the
    1.86 +   * |docShell's| current DOMWindow using the given pageStyle |data|.
    1.87 +   *
    1.88 +   * Warning: If the current frame hierarchy doesn't match that of the given
    1.89 +   * |data| object we will silently discard data for unreachable frames. We may
    1.90 +   * as well assign page styles to the wrong frames if some were reordered or
    1.91 +   * removed.
    1.92 +   *
    1.93 +   * @param docShell (nsIDocShell)
    1.94 +   * @param data (object)
    1.95 +   *        {
    1.96 +   *          disabled: true, // when true, author styles will be disabled
    1.97 +   *          pageStyle: "Dusk",
    1.98 +   *          children: [
    1.99 +   *            null,
   1.100 +   *            {pageStyle: "Mozilla", children: [ ... ]}
   1.101 +   *          ]
   1.102 +   *        }
   1.103 +   */
   1.104 +  restoreTree: function (docShell, data) {
   1.105 +    let disabled = data.disabled || false;
   1.106 +    let markupDocumentViewer =
   1.107 +      docShell.contentViewer.QueryInterface(Ci.nsIMarkupDocumentViewer);
   1.108 +    markupDocumentViewer.authorStyleDisabled = disabled;
   1.109 +
   1.110 +    function restoreFrame(root, data) {
   1.111 +      if (data.hasOwnProperty("pageStyle")) {
   1.112 +        root.document.selectedStyleSheetSet = data.pageStyle;
   1.113 +      }
   1.114 +
   1.115 +      if (!data.hasOwnProperty("children")) {
   1.116 +        return;
   1.117 +      }
   1.118 +
   1.119 +      let frames = root.frames;
   1.120 +      data.children.forEach((child, index) => {
   1.121 +        if (child && index < frames.length) {
   1.122 +          restoreFrame(frames[index], child);
   1.123 +        }
   1.124 +      });
   1.125 +    }
   1.126 +
   1.127 +    let ifreq = docShell.QueryInterface(Ci.nsIInterfaceRequestor);
   1.128 +    restoreFrame(ifreq.getInterface(Ci.nsIDOMWindow), data);
   1.129 +  }
   1.130 +};