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 #include <jni.h>
6 #include <vector>
7
8 #include "base/android/jni_android.h"
9 #include "base/android/jni_string.h"
10 #include "base/android/scoped_java_ref.h"
11 #include "base/basictypes.h"
12 #include "base/lazy_instance.h"
13 #include "base/logging.h"
14 #include "content/browser/android/content_view_statics.h"
15 #include "content/common/android/address_parser.h"
16 #include "content/common/view_messages.h"
17 #include "content/public/browser/render_process_host.h"
18 #include "jni/ContentViewStatics_jni.h"
19
20 using base::android::ConvertJavaStringToUTF16;
21 using base::android::ConvertUTF16ToJavaString;
22
23 namespace {
24
25 // TODO(pliard): http://crbug.com/235909. Move WebKit shared timer toggling
26 // functionality out of ContentViewStatistics and not be build on top of
27 // blink::Platform::SuspendSharedTimer.
28 // TODO(pliard): http://crbug.com/235912. Add unit tests for WebKit shared timer
29 // toggling.
30
31 // This tracks the renderer processes that received a suspend request. It's
32 // important on resume to only resume the renderer processes that were actually
33 // suspended as opposed to all the current renderer processes because the
34 // suspend calls are refcounted within WebKitPlatformSupport and it expects a
35 // perfectly matched number of resume calls.
36 // Note that this vector is only accessed from the UI thread.
37 base::LazyInstance<std::vector<int /* process id */> > g_suspended_processes =
38 LAZY_INSTANCE_INITIALIZER;
39
40 // Suspends timers in all current render processes.
SuspendWebKitSharedTimers(std::vector<int> * suspended_processes)41 void SuspendWebKitSharedTimers(std::vector<int>* suspended_processes) {
42 for (content::RenderProcessHost::iterator i(
43 content::RenderProcessHost::AllHostsIterator());
44 !i.IsAtEnd(); i.Advance()) {
45 content::RenderProcessHost* host = i.GetCurrentValue();
46 suspended_processes->push_back(host->GetID());
47 host->Send(new ViewMsg_SetWebKitSharedTimersSuspended(true));
48 }
49 }
50
51 // Resumes timers in processes that were previously stopped.
ResumeWebkitSharedTimers(const std::vector<int> & suspended_processes)52 void ResumeWebkitSharedTimers(const std::vector<int>& suspended_processes) {
53 for (std::vector<int>::const_iterator it = suspended_processes.begin();
54 it != suspended_processes.end(); ++it) {
55 content::RenderProcessHost* host = content::RenderProcessHost::FromID(*it);
56 if (host) // The process might have been killed since it was suspended.
57 host->Send(new ViewMsg_SetWebKitSharedTimersSuspended(false));
58 }
59 }
60
61 } // namespace
62
63 // Returns the first substring consisting of the address of a physical location.
FindAddress(JNIEnv * env,jclass clazz,jstring addr)64 static jstring FindAddress(JNIEnv* env, jclass clazz, jstring addr) {
65 base::string16 content_16 = ConvertJavaStringToUTF16(env, addr);
66 base::string16 result_16;
67 if (content::address_parser::FindAddress(content_16, &result_16))
68 return ConvertUTF16ToJavaString(env, result_16).Release();
69 return NULL;
70 }
71
SetWebKitSharedTimersSuspended(JNIEnv * env,jclass obj,jboolean suspend)72 static void SetWebKitSharedTimersSuspended(JNIEnv* env,
73 jclass obj,
74 jboolean suspend) {
75 std::vector<int>* suspended_processes = g_suspended_processes.Pointer();
76 if (suspend) {
77 DCHECK(suspended_processes->empty());
78 SuspendWebKitSharedTimers(suspended_processes);
79 } else {
80 ResumeWebkitSharedTimers(*suspended_processes);
81 suspended_processes->clear();
82 }
83 }
84
85 namespace content {
86
RegisterWebViewStatics(JNIEnv * env)87 bool RegisterWebViewStatics(JNIEnv* env) {
88 return RegisterNativesImpl(env) >= 0;
89 }
90
91 } // namespace content
92