Expose images to accessibility

chrome/browser/resources/chromeos/chromevox/common/dom_util.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview A collection of JavaScript utilities used to simplify working
  * with the DOM.
  */
 
 
@@ skipping 462 matching lines @@
       for (var labelNodeId, i = 0; labelNodeId = labelNodeIds[i]; i++) {
         var labelNode = document.getElementById(labelNodeId);
         if (labelNode) {
           label += ' ' + cvox.DomUtil.getName(
               labelNode, true, includeControls, true);
         }
       }
     } else if (node.hasAttribute('aria-label')) {
       label = node.getAttribute('aria-label');
     } else if (node.constructor == HTMLImageElement) {
-      label = cvox.DomUtil.getImageTitle(node);
+      label = 'img ' + cvox.DomUtil.getImageTitle(node);
     } else if (node.tagName == 'FIELDSET') {
       // Other labels will trump fieldset legend with this implementation.
       // Depending on how this works out on the web, we may later switch this
       // to appending the fieldset legend to any existing label.
       var legends = node.getElementsByTagName('LEGEND');
       label = '';
       for (var legend, i = 0; legend = legends[i]; i++) {
         label += ' ' + cvox.DomUtil.getName(legend, true, includeControls);
       }
     }
@@ skipping 419 matching lines @@
 /**
  * Given an image node, return its title as a string. The preferred title
  * is always the alt text, and if that's not available, then the title
  * attribute. If neither of those are available, it attempts to construct
  * a title from the filename, and if all else fails returns the word Image.
  * @param {Node} node The image node.
  * @return {string} The title of the image.
  */
 cvox.DomUtil.getImageTitle = function(node) {
   var text;
+
   if (node.hasAttribute('alt')) {
     text = node.alt;
+    text = 'alt';

[dmazzoni, 2016/11/04 18:36:07]

i'm assuming this is debugging code?

   } else if (node.hasAttribute('title')) {
     text = node.title;
+    text = 'title';
   } else {
     var url = node.src;
     if (url.substring(0, 4) != 'data') {
       var filename = url.substring(
           url.lastIndexOf('/') + 1, url.lastIndexOf('.'));
 
       // Hack to not speak the filename if it's ridiculously long.
       if (filename.length >= 1 && filename.length <= 16) {
         text = filename + ' Image';
       } else {
         text = 'Image';
       }
     } else {
       text = 'Image';
     }
+    text = 'else ' + text;
   }
   return text;
 };
 
 
 /**
  * Search the whole page for any aria-labelledby attributes and collect
  * the complete set of ids they map to, so that we can skip elements that
  * just label other elements and not double-speak them. We cache this
  * result and then throw it away at the next event loop.
@@ skipping 1649 matching lines @@
         var describedNode = document.getElementById(describedById);
         if (describedNode) {
           desc += ' ' + cvox.DomUtil.getName(
               describedNode, true, true, true);
         }
       }
     }
   }
   return desc;
 };