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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/aura/client/default_capture_client.h"
#include "base/observer_list.h"
#include "ui/aura/client/capture_client_observer.h"
#include "ui/aura/env.h"
#include "ui/aura/window.h"
#include "ui/aura/window_event_dispatcher.h"
#include "ui/aura/window_tree_host.h"
namespace aura {
namespace client {
namespace {
// Track the active capture window across root windows.
Window* global_capture_window_ = nullptr;
} // namespace
DefaultCaptureClient::DefaultCaptureClient(Window* root_window)
: root_window_(root_window), capture_window_(nullptr) {
DCHECK(root_window_);
SetCaptureClient(root_window_, this);
}
DefaultCaptureClient::~DefaultCaptureClient() {
if (global_capture_window_ == capture_window_)
global_capture_window_ = nullptr;
SetCaptureClient(root_window_, nullptr);
}
void DefaultCaptureClient::SetCapture(Window* window) {
if (capture_window_ == window)
return;
if (window)
Env::GetInstance()->gesture_recognizer()->CancelActiveTouchesExcept(window);
Window* old_capture_window = capture_window_;
capture_window_ = window;
global_capture_window_ = window;
CaptureDelegate* capture_delegate = nullptr;
if (capture_window_) {
DCHECK(!root_window_ || root_window_ == capture_window_->GetRootWindow());
capture_delegate = capture_window_->GetHost()->dispatcher();
capture_delegate->SetNativeCapture();
} else {
DCHECK(!root_window_ ||
root_window_ == old_capture_window->GetRootWindow());
capture_delegate = old_capture_window->GetHost()->dispatcher();
capture_delegate->ReleaseNativeCapture();
}
capture_delegate->UpdateCapture(old_capture_window, capture_window_);
observers_.Notify(&CaptureClientObserver::OnCaptureChanged,
old_capture_window, capture_window_);
}
void DefaultCaptureClient::ReleaseCapture(Window* window) {
if (capture_window_ != window)
return;
SetCapture(NULL);
}
Window* DefaultCaptureClient::GetCaptureWindow() {
return capture_window_;
}
Window* DefaultCaptureClient::GetGlobalCaptureWindow() {
return global_capture_window_;
}
void DefaultCaptureClient::AddObserver(CaptureClientObserver* observer) {
observers_.AddObserver(observer);
}
void DefaultCaptureClient::RemoveObserver(CaptureClientObserver* observer) {
observers_.RemoveObserver(observer);
}
} // namespace client
} // namespace aura
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