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 // Listen for a click on the camera icon. On that click, take a screenshot.
13 chrome.browserAction.onClicked.addListener(function() {
15 chrome.tabs.captureVisibleTab(function(screenshotUrl) {
16 var viewTabUrl = chrome.extension.getURL('screenshot.html?id=' + id++)
19 chrome.tabs.onUpdated.addListener(function listener(tabId, changedProps) {
20 // We are waiting for the tab we opened to finish loading.
21 // Check that the tab's id matches the tab we opened,
22 // and that the tab is done loading.
23 if (tabId != targetId || changedProps.status != "complete")
26 // Passing the above test means this is the event we were waiting for.
27 // There is nothing we need to do for future onUpdated events, so we
28 // use removeListner to stop getting called when onUpdated events fire.
29 chrome.tabs.onUpdated.removeListener(listener);
31 // Look through all views to find the window which will display
32 // the screenshot. The url of the tab which will display the
33 // screenshot includes a query parameter with a unique id, which
34 // ensures that exactly one view will have the matching URL.
35 var views = chrome.extension.getViews();
36 for (var i = 0; i < views.length; i++) {
38 if (view.location.href == viewTabUrl) {
39 view.setScreenshotUrl(screenshotUrl);
45 chrome.tabs.create({url: viewTabUrl}, function(tab) {