Open hyperlinks in PDF in a new tab when middle mouse clicking.

chrome/browser/resources/pdf/pdf.js

 // Copyright 2013 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.
 
 'use strict';
 
 /**
  * @return {number} Width of a scrollbar in pixels
  */
 function getScrollbarWidth() {
@@ skipping 586 matching lines @@
           this.toolbar_.docLength =
               this.documentDimensions_.pageDimensions.length;
         }
         break;
       case 'email':
         var href = 'mailto:' + message.data.to + '?cc=' + message.data.cc +
             '&bcc=' + message.data.bcc + '&subject=' + message.data.subject +
             '&body=' + message.data.body;
         window.location.href = href;
         break;
+      case 'getLinkPositionReply':
+        var visiblePage = this.viewport_.getMostVisiblePage();
+        var visiblePageDimensions =
+            this.viewport_.getPageScreenRect(visiblePage);
+
+        var linkExists = false;
+        var viewportCoordinateX;
+        var viewportCoordinateY;
+        if (message.data.x !== undefined && message.data.y !== undefined) {

[raymes, 2016/07/13 02:03:25]

The position of the first link in the test document should always be the same
(in page/document coordinates). So we shouldn't need to go to the plugin. The
only thing we have to do then is convert this into screen coordinates. We can
avoid adding code here to do this by accessing the viewport_ directly from the
test. Take a look at PdfZoomWithoutBubble for an example of accessing the
viewport. This should hopefully simplify the test a lot.

+          linkExists = true;
+          viewportCoordinateX = message.data.x + visiblePageDimensions.x;
+          viewportCoordinateY = message.data.y + visiblePageDimensions.y +
+              PDFViewer.MATERIAL_TOOLBAR_HEIGHT;
+        }
+
+        this.sendScriptingMessage_({
+          type: 'getLinkPositionReply',
+          linkExists: linkExists,
+          x: viewportCoordinateX,
+          y: viewportCoordinateY
+        });
+        break;
       case 'getPassword':
         // If the password screen isn't up, put it up. Otherwise we're
         // responding to an incorrect password so deny it.
         if (!this.passwordScreen_.active)
           this.passwordScreen_.active = true;
         else
           this.passwordScreen_.deny();
         break;
       case 'getSelectedTextReply':
         this.sendScriptingMessage_(message.data);
@@ skipping 155 matching lines @@
       return;
 
     // Delay scripting messages from users of the scripting API until the
     // document is loaded. This simplifies use of the APIs.
     if (this.loadState_ != LoadState.SUCCESS) {
       this.delayedScriptingMessages_.push(message);
       return;
     }
 
     switch (message.data.type.toString()) {
+      case 'getLinkPosition':
       case 'getSelectedText':
       case 'print':
       case 'selectAll':
         this.plugin_.postMessage(message.data);
         break;
     }
   },
 
   /**
    * @private
@@ skipping 82 matching lines @@
    * Each bookmark is an Object containing a:
    * - title
    * - page (optional)
    * - array of children (themselves bookmarks)
    * @type {Array} the top-level bookmarks of the PDF.
    */
   get bookmarks() {
     return this.bookmarks_;
   }
 };