chrome/test/data/extensions/subscribe_page_action/background.js

   1 // Copyright (c) 2012 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 chrome.extension.onMessage.addListener(function(request, sender) {
   6   if (request.msg == "feedIcon") {
   7     // First validate that all the URLs have the right schema.
   8     var input = [];
   9     for (var i = 0; i < request.feeds.length; ++i) {
  10       var a = document.createElement('a');
  11       a.href = request.feeds[i].href;
  12       if (a.protocol == "http:" || a.protocol == "https:") {
  13         input.push(request.feeds[i]);
  14       } else {
  15         console.log('Warning: feed source rejected (wrong protocol): ' +
  16                     request.feeds[i].href);
  17       }
  18     }
  19
  20     if (input.length == 0)
  21       return;  // We've rejected all the input, so abort.
  22
  23     // We have received a list of feed urls found on the page.
  24     var feeds = {};
  25     feeds[sender.tab.id] = input;
  26     chrome.storage.local.set(feeds, function() {
  27       // Enable the page action icon.
  28       chrome.pageAction.setTitle(
  29         { tabId: sender.tab.id,
  30           title: chrome.i18n.getMessage("rss_subscription_action_title")
  31         });
  32       chrome.pageAction.show(sender.tab.id);
  33     });
  34   } else if (request.msg == "feedDocument") {
  35     // We received word from the content script that this document
  36     // is an RSS feed (not just a document linking to the feed).
  37     // So, we go straight to the subscribe page in a new tab and
  38     // navigate back on the current page (to get out of the xml page).
  39     // We don't want to navigate in-place because trying to go back
  40     // from the subscribe page takes us back to the xml page, which
  41     // will redirect to the subscribe page again (we don't support a
  42     // location.replace equivalant in the Tab navigation system).
  43     chrome.tabs.executeScript(sender.tab.id,
  44         { code: "if (history.length > 1) " +
  45                  "history.go(-1); else window.close();"
  46         });
  47     var url = "subscribe.html?" + encodeURIComponent(request.href);
  48     url = chrome.extension.getURL(url);
  49     chrome.tabs.create({ url: url, index: sender.tab.index });
  50   }
  51 });
  52
  53 chrome.tabs.onRemoved.addListener(function(tabId) {
  54   chrome.storage.local.remove(tabId.toString());
  55 });