Refactoring of code by moving navigate_() to separate file.

chrome/browser/resources/pdf/pdf.js

Index: chrome/browser/resources/pdf/pdf.js
diff --git a/chrome/browser/resources/pdf/pdf.js b/chrome/browser/resources/pdf/pdf.js
index b2969e4ce52f7064cf47f6bbe914cfc72ab6a877..05eca0b494456cd3d2acaec566154fd56acdd20f 100644
--- a/chrome/browser/resources/pdf/pdf.js
+++ b/chrome/browser/resources/pdf/pdf.js
@@ -153,6 +153,8 @@ function PDFViewer(streamDetails) {
 
   // Parse open pdf parameters.
   this.paramsParser_ = new OpenPDFParamsParser();
+  this.navigator_ = new Navigator(this.streamDetails_.originalUrl,
+      this.viewport_, this.paramsParser_);
 }
 
 PDFViewer.prototype = {
@@ -362,68 +364,6 @@ PDFViewer.prototype = {
 
   /**
    * @private
-   * Helper function to navigate to given URL. This might involve navigating
-   * within the PDF page or opening a new url (in the same tab or a new tab).
-   * @param {string} url The URL to navigate to.
-   * @param {boolean} newTab Whether to perform the navigation in a new tab or
-   * in the current tab.
-   */
-  navigate_: function(url, newTab) {
-    if (url.length == 0)
-      return;
-    var originalUrl = this.streamDetails_.originalUrl;
-    // If |urlFragment| starts with '#', then it's for the same URL with a
-    // different URL fragment.
-    if (url.charAt(0) == '#') {
-      // if '#' is already present in |originalUrl| then remove old fragment
-      // and add new url fragment.
-      var hashIndex = originalUrl.search('#');
-      if (hashIndex != -1)
-        url = originalUrl.substring(0, hashIndex) + url;
-      else
-        url = originalUrl + url;
-    }
-
-    // If there's no scheme, add http.
-    if (url.indexOf('://') == -1 && url.indexOf('mailto:') == -1)
-      url = 'http://' + url;
-
-    // Make sure url starts with a valid scheme.
-    if (url.indexOf('http://') != 0 &&
-        url.indexOf('https://') != 0 &&
-        url.indexOf('ftp://') != 0 &&
-        url.indexOf('file://') != 0 &&
-        url.indexOf('mailto:') != 0) {
-      return;
-    }
-    // Make sure url is not only a scheme.
-    if (url == 'http://' ||
-        url == 'https://' ||
-        url == 'ftp://' ||
-        url == 'file://' ||
-        url == 'mailto:') {
-      return;
-    }
-
-    if (newTab) {
-      // Prefer the tabs API because it guarantees we can just open a new tab.
-      // window.open doesn't have this guarantee.
-      if (chrome.tabs)
-        chrome.tabs.create({ url: url });
-      else
-        window.open(url);
-    } else {
-      var pageNumber =
-          this.paramsParser_.getViewportFromUrlParams(url).page;
-      if (pageNumber != undefined)
-        this.viewport_.goToPage(pageNumber);
-      else
-        window.location.href = url;
-    }
-  },
-
-  /**
-   * @private
    * An event handler for handling message events received from the plugin.
    * @param {MessageObject} message a message event.
    */
@@ -471,7 +411,7 @@ PDFViewer.prototype = {
         if (this.isPrintPreview_)
           this.navigate_(message.data.url, true);
         else
-          this.navigate_(message.data.url, message.data.newTab);
+          this.navigator_.navigate(message.data.url, message.data.newTab);
         break;
       case 'setNamedDestinations':
         this.paramsParser_.namedDestinations = message.data.namedDestinations;