1 /*
2 * Copyright 2021 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <gui/ISurfaceComposer.h>
18 #include <gui/WindowInfosListenerReporter.h>
19
20 namespace android {
21
22 using gui::IWindowInfosReportedListener;
23 using gui::WindowInfo;
24 using gui::WindowInfosListener;
25
getInstance()26 sp<WindowInfosListenerReporter> WindowInfosListenerReporter::getInstance() {
27 static sp<WindowInfosListenerReporter> sInstance = new WindowInfosListenerReporter;
28 return sInstance;
29 }
30
addWindowInfosListener(const sp<WindowInfosListener> & windowInfosListener,const sp<ISurfaceComposer> & surfaceComposer)31 status_t WindowInfosListenerReporter::addWindowInfosListener(
32 const sp<WindowInfosListener>& windowInfosListener,
33 const sp<ISurfaceComposer>& surfaceComposer) {
34 status_t status = OK;
35 {
36 std::scoped_lock lock(mListenersMutex);
37 if (mWindowInfosListeners.empty()) {
38 status = surfaceComposer->addWindowInfosListener(this);
39 }
40
41 if (status == OK) {
42 mWindowInfosListeners.insert(windowInfosListener);
43 }
44 }
45
46 return status;
47 }
48
removeWindowInfosListener(const sp<WindowInfosListener> & windowInfosListener,const sp<ISurfaceComposer> & surfaceComposer)49 status_t WindowInfosListenerReporter::removeWindowInfosListener(
50 const sp<WindowInfosListener>& windowInfosListener,
51 const sp<ISurfaceComposer>& surfaceComposer) {
52 status_t status = OK;
53 {
54 std::scoped_lock lock(mListenersMutex);
55 if (mWindowInfosListeners.size() == 1) {
56 status = surfaceComposer->removeWindowInfosListener(this);
57 }
58
59 if (status == OK) {
60 mWindowInfosListeners.erase(windowInfosListener);
61 }
62 }
63
64 return status;
65 }
66
onWindowInfosChanged(const std::vector<WindowInfo> & windowInfos,const sp<IWindowInfosReportedListener> & windowInfosReportedListener)67 binder::Status WindowInfosListenerReporter::onWindowInfosChanged(
68 const std::vector<WindowInfo>& windowInfos,
69 const sp<IWindowInfosReportedListener>& windowInfosReportedListener) {
70 std::unordered_set<sp<WindowInfosListener>, ISurfaceComposer::SpHash<WindowInfosListener>>
71 windowInfosListeners;
72
73 {
74 std::scoped_lock lock(mListenersMutex);
75 for (auto listener : mWindowInfosListeners) {
76 windowInfosListeners.insert(listener);
77 }
78 }
79
80 for (auto listener : windowInfosListeners) {
81 listener->onWindowInfosChanged(windowInfos);
82 }
83
84 if (windowInfosReportedListener) {
85 windowInfosReportedListener->onWindowInfosReported();
86 }
87
88 return binder::Status::ok();
89 }
90
reconnect(const sp<ISurfaceComposer> & composerService)91 void WindowInfosListenerReporter::reconnect(const sp<ISurfaceComposer>& composerService) {
92 std::scoped_lock lock(mListenersMutex);
93 if (!mWindowInfosListeners.empty()) {
94 composerService->addWindowInfosListener(this);
95 }
96 }
97
98 } // namespace android