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.
5 // To make sure we can uniquely identify each screenshot tab, add an id as a
6 // query param to the url that displays the screenshot.
7 // Note: It's OK that this is a global variable (and not in localStorage),
8 // because the event page will stay open as long as any screenshot tabs are
12 function takeScreenshot() {
13 chrome.tabs.captureVisibleTab(null, function(img) {
14 var screenshotUrl = img;
15 var viewTabUrl = chrome.extension.getURL('screenshot.html?id=' + id++)
17 chrome.tabs.create({url: viewTabUrl}, function(tab) {
18 var targetId = tab.id;
20 var addSnapshotImageToTab = function(tabId, changedProps) {
21 // We are waiting for the tab we opened to finish loading.
22 // Check that the the tab's id matches the tab we opened,
23 // and that the tab is done loading.
24 if (tabId != targetId || changedProps.status != "complete")
27 // Passing the above test means this is the event we were waiting for.
28 // There is nothing we need to do for future onUpdated events, so we
29 // use removeListner to stop geting called when onUpdated events fire.
30 chrome.tabs.onUpdated.removeListener(addSnapshotImageToTab);
32 // Look through all views to find the window which will display
33 // the screenshot. The url of the tab which will display the
34 // screenshot includes a query parameter with a unique id, which
35 // ensures that exactly one view will have the matching URL.
36 var views = chrome.extension.getViews();
37 for (var i = 0; i < views.length; i++) {
39 if (view.location.href == viewTabUrl) {
40 view.setScreenshotUrl(screenshotUrl);
45 chrome.tabs.onUpdated.addListener(addSnapshotImageToTab);
50 // Listen for a click on the camera icon. On that click, take a screenshot.
51 chrome.browserAction.onClicked.addListener(function(tab) {
52 if (tab.url.match("^https?://code.google.com")) {
55 alert('This sample can only take screenshots of code.google.com pages');