1 | // Copyright (c) 2013 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 | package org.chromium.android_webview.test.util; |
6 | |
7 | import org.chromium.content.browser.ContentViewCore; |
8 | |
9 | /** |
10 | * This class is used to be notified when a javascript event happened. It add itself as |
11 | * a javascript interface, so it could be notified by javascript when needed. |
12 | * |
13 | * 1. Call register() is to add a javascript interface into ContentViewCore. |
14 | * 2. Using waitForEnvent() to wait javascript event. |
15 | * 3. In javascript call notifyJava() when you want Java side know something is done. |
16 | */ |
17 | public class JavascriptEventObserver { |
18 | private Object mEvent = new Object(); |
19 | private boolean mHappened; |
20 | |
21 | /** |
22 | * Register into javascript, must be called in UI thread. |
23 | * |
24 | * @param contentViewCore |
25 | * @param name the name of object used in javascript |
26 | */ |
27 | public void register(ContentViewCore contentViewCore, String name) { |
28 | contentViewCore.addPossiblyUnsafeJavascriptInterface(this, name, null); |
29 | } |
30 | |
31 | /** |
32 | * Wait for the javascript event happen for specific time, there is no timeout parameter, |
33 | * return true if the event happened. |
34 | */ |
35 | public boolean waitForEvent(long time) throws InterruptedException { |
36 | synchronized (mEvent) { |
37 | if (mHappened) return mHappened; |
38 | mEvent.wait(time); |
39 | boolean happened = mHappened; |
40 | mHappened = false; |
41 | return happened; |
42 | } |
43 | } |
44 | |
45 | /** |
46 | * Wait for the javascript event happen, there is no timeout parameter, you usually |
47 | * should depend on unit test's timeout. |
48 | */ |
49 | public void waitForEvent() throws InterruptedException { |
50 | synchronized (mEvent) { |
51 | if (mHappened) return; |
52 | while (!mHappened) { |
53 | mEvent.wait(); |
54 | } |
55 | mHappened = false; |
56 | } |
57 | } |
58 | |
59 | /** |
60 | * Javascript should call this method by name.notifyJava, the name is the |name| |
61 | * parameter of register() method. |
62 | */ |
63 | public void notifyJava() { |
64 | synchronized (mEvent) { |
65 | mHappened = true; |
66 | mEvent.notify(); |
67 | } |
68 | } |
69 | } |