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Side by Side Diff: content/browser/screen_orientation/screen_orientation_listener_android.cc

Issue 2688383002: [ScreenOrientation] Merge mojo interface ScreenOrientationListener into ScreenOrientation
Patch Set: Address comments from mlamouri@ Created 3 years, 10 months ago
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1 // Copyright 2014 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 "content/browser/screen_orientation/screen_orientation_listener_android .h"
6
7 #include "base/message_loop/message_loop.h"
8 #include "content/browser/screen_orientation/screen_orientation_delegate_android .h"
9 #include "content/common/screen_orientation_messages.h"
10
11 namespace content {
12
13 ScreenOrientationListenerAndroid::ScreenOrientationListenerAndroid()
14 : BrowserMessageFilter(ScreenOrientationMsgStart),
15 BrowserAssociatedInterface<device::mojom::ScreenOrientationListener>(
16 this,
17 this),
18 listeners_count_(0) {}
19
20 ScreenOrientationListenerAndroid::~ScreenOrientationListenerAndroid() {
21 DCHECK(base::MessageLoopForIO::IsCurrent());
22 if (listeners_count_ > 0)
23 ScreenOrientationDelegateAndroid::StopAccurateListening();
24 }
25
26 bool ScreenOrientationListenerAndroid::OnMessageReceived(
27 const IPC::Message& message) {
28 return false;
29 }
30
31 void ScreenOrientationListenerAndroid::Start() {
32 DCHECK(base::MessageLoopForIO::IsCurrent());
33 ++listeners_count_;
34 if (listeners_count_ == 1)
35 ScreenOrientationDelegateAndroid::StartAccurateListening();
36 }
37
38 void ScreenOrientationListenerAndroid::Stop() {
39 DCHECK(base::MessageLoopForIO::IsCurrent());
40 DCHECK(listeners_count_ > 0);
41 --listeners_count_;
42 if (listeners_count_ == 0)
43 ScreenOrientationDelegateAndroid::StopAccurateListening();
44 }
45
46 } // namespace content
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