chrome/browser/resources/pdf/navigator.js

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 'use strict';
   6
   7 /**
   8  * Creates a new Navigator for navigating to links inside or outside the PDF.
   9  * @param {string} originalUrl The original page URL.
  10  * @param {Object} viewport The viewport info of the page.
  11  * @param {Object} paramsParser The object for URL parsing.
  12  * @param {Function} navigateInCurrentTabCallback The Callback function that
  13  *    gets called when navigation happens in the current tab.
  14  * @param {Function} navigateInNewTabCallback The Callback function that gets
  15  *    called when navigation happens in the new tab.
  16  */
  17 function Navigator(originalUrl,
  18                    viewport,
  19                    paramsParser,
  20                    navigateInCurrentTabCallback,
  21                    navigateInNewTabCallback) {
  22   this.originalUrl_ = originalUrl;
  23   this.viewport_ = viewport;
  24   this.paramsParser_ = paramsParser;
  25   this.navigateInCurrentTabCallback_ = navigateInCurrentTabCallback;
  26   this.navigateInNewTabCallback_ = navigateInNewTabCallback;
  27 }
  28
  29 Navigator.prototype = {
  30    /**
  31    * @private
  32    * Function to navigate to the given URL. This might involve navigating
  33    * within the PDF page or opening a new url (in the same tab or a new tab).
  34    * @param {string} url The URL to navigate to.
  35    * @param {boolean} newTab Whether to perform the navigation in a new tab or
  36    *    in the current tab.
  37    */
  38   navigate: function(url, newTab) {
  39     if (url.length == 0)
  40       return;
  41     // If |urlFragment| starts with '#', then it's for the same URL with a
  42     // different URL fragment.
  43     if (url.charAt(0) == '#') {
  44       // if '#' is already present in |originalUrl| then remove old fragment
  45       // and add new url fragment.
  46       var hashIndex = this.originalUrl_.search('#');
  47       if (hashIndex != -1)
  48         url = this.originalUrl_.substring(0, hashIndex) + url;
  49       else
  50         url = this.originalUrl_ + url;
  51     }
  52
  53     // If there's no scheme, add http.
  54     if (url.indexOf('://') == -1 && url.indexOf('mailto:') == -1)
  55       url = 'http://' + url;
  56
  57     // Make sure inputURL starts with a valid scheme.
  58     if (url.indexOf('http://') != 0 &&
  59         url.indexOf('https://') != 0 &&
  60         url.indexOf('ftp://') != 0 &&
  61         url.indexOf('file://') != 0 &&
  62         url.indexOf('mailto:') != 0) {
  63       return;
  64     }
  65     // Make sure inputURL is not only a scheme.
  66     if (url == 'http://' ||
  67         url == 'https://' ||
  68         url == 'ftp://' ||
  69         url == 'file://' ||
  70         url == 'mailto:') {
  71       return;
  72     }
  73
  74     if (newTab) {
  75       this.navigateInNewTabCallback_(url);
  76     } else {
  77       this.paramsParser_.getViewportFromUrlParams(
  78           url, this.onViewportReceived_.bind(this));
  79     }
  80   },
  81
  82    /**
  83    * @private
  84    * Called when the viewport position is received.
  85    * @param {Object} viewportPosition Dictionary containing the viewport
  86    *    position.
  87    */
  88   onViewportReceived_: function(viewportPosition) {
  89     var pageNumber = viewportPosition.page;
  90     if (pageNumber != undefined)
  91       this.viewport_.goToPage(pageNumber);
  92     else
  93       this.navigateInCurrentTabCallback_(viewportPosition['url']);
  94   }
  95 };