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/*
* Copyright 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "WindowInfosListenerInvoker.h"
#include <gui/ISurfaceComposer.h>
#include <unordered_set>
#include "SurfaceFlinger.h"
namespace android {
using gui::IWindowInfosListener;
using gui::WindowInfo;
struct WindowInfosReportedListener : gui::BnWindowInfosReportedListener {
explicit WindowInfosReportedListener(std::function<void()> listenerCb)
: mListenerCb(listenerCb) {}
binder::Status onWindowInfosReported() override {
if (mListenerCb != nullptr) {
mListenerCb();
}
return binder::Status::ok();
}
std::function<void()> mListenerCb;
};
WindowInfosListenerInvoker::WindowInfosListenerInvoker(const sp<SurfaceFlinger>& sf) : mSf(sf) {
mWindowInfosReportedListener =
new WindowInfosReportedListener([&]() { windowInfosReported(); });
}
void WindowInfosListenerInvoker::addWindowInfosListener(
const sp<IWindowInfosListener>& windowInfosListener) {
sp<IBinder> asBinder = IInterface::asBinder(windowInfosListener);
asBinder->linkToDeath(this);
std::scoped_lock lock(mListenersMutex);
mWindowInfosListeners.emplace(asBinder, windowInfosListener);
}
void WindowInfosListenerInvoker::removeWindowInfosListener(
const sp<IWindowInfosListener>& windowInfosListener) {
sp<IBinder> asBinder = IInterface::asBinder(windowInfosListener);
std::scoped_lock lock(mListenersMutex);
asBinder->unlinkToDeath(this);
mWindowInfosListeners.erase(asBinder);
}
void WindowInfosListenerInvoker::binderDied(const wp<IBinder>& who) {
std::scoped_lock lock(mListenersMutex);
mWindowInfosListeners.erase(who);
}
void WindowInfosListenerInvoker::windowInfosChanged(const std::vector<WindowInfo>& windowInfos,
bool shouldSync) {
std::unordered_set<sp<IWindowInfosListener>, ISurfaceComposer::SpHash<IWindowInfosListener>>
windowInfosListeners;
{
std::scoped_lock lock(mListenersMutex);
for (const auto& [_, listener] : mWindowInfosListeners) {
windowInfosListeners.insert(listener);
}
}
mCallbacksPending = windowInfosListeners.size();
for (const auto& listener : windowInfosListeners) {
listener->onWindowInfosChanged(windowInfos,
shouldSync ? mWindowInfosReportedListener : nullptr);
}
}
void WindowInfosListenerInvoker::windowInfosReported() {
mCallbacksPending--;
if (mCallbacksPending == 0) {
mSf->windowInfosReported();
}
}
} // namespace android
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