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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/wm/window_modality_controller.h"
#include <algorithm>
#include "ash/wm/window_util.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/client/capture_client.h"
#include "ui/aura/env.h"
#include "ui/aura/event.h"
#include "ui/aura/root_window.h"
#include "ui/aura/window.h"
#include "ui/base/ui_base_types.h"
namespace ash {
namespace wm {
namespace {
bool TransientChildIsWindowModal(aura::Window* window) {
return window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_WINDOW;
}
aura::Window* GetWindowModalTransientChild(aura::Window* window) {
aura::Window::Windows::const_iterator it;
for (it = window->transient_children().begin();
it != window->transient_children().end();
++it) {
if (TransientChildIsWindowModal(*it) && (*it)->IsVisible()) {
if (!(*it)->transient_children().empty())
return GetWindowModalTransientChild(*it);
return *it;
}
}
return NULL;
}
} // namespace
aura::Window* GetWindowModalTransient(aura::Window* window) {
if (!window)
return NULL;
// We always want to check the for the transient child of the activatable
// window.
window = wm::GetActivatableWindow(window);
if (!window)
return NULL;
return GetWindowModalTransientChild(window);
}
} // namespace wm
namespace internal {
////////////////////////////////////////////////////////////////////////////////
// WindowModalityController, public:
WindowModalityController::WindowModalityController() {
aura::Env::GetInstance()->AddObserver(this);
}
WindowModalityController::~WindowModalityController() {
aura::Env::GetInstance()->RemoveObserver(this);
for (size_t i = 0; i < windows_.size(); ++i)
windows_[i]->RemoveObserver(this);
}
////////////////////////////////////////////////////////////////////////////////
// WindowModalityController, aura::EventFilter implementation:
bool WindowModalityController::PreHandleKeyEvent(aura::Window* target,
aura::KeyEvent* event) {
return !!wm::GetWindowModalTransient(target);
}
bool WindowModalityController::PreHandleMouseEvent(aura::Window* target,
aura::MouseEvent* event) {
aura::Window* modal_transient_child = wm::GetWindowModalTransient(target);
if (modal_transient_child && event->type() == ui::ET_MOUSE_PRESSED)
wm::ActivateWindow(modal_transient_child);
return !!modal_transient_child;
}
ui::TouchStatus WindowModalityController::PreHandleTouchEvent(
aura::Window* target,
aura::TouchEvent* event) {
// TODO: make touch work with modals.
return ui::TOUCH_STATUS_UNKNOWN;
}
ui::GestureStatus WindowModalityController::PreHandleGestureEvent(
aura::Window* target,
aura::GestureEvent* event) {
// TODO: make gestures work with modals.
return ui::GESTURE_STATUS_UNKNOWN;
}
void WindowModalityController::OnWindowInitialized(aura::Window* window) {
windows_.push_back(window);
window->AddObserver(this);
}
void WindowModalityController::OnWindowVisibilityChanged(
aura::Window* window,
bool visible) {
if (visible && window->GetProperty(aura::client::kModalKey) ==
ui::MODAL_TYPE_WINDOW) {
// Make sure no other window has capture, otherwise |window| won't get mouse
// events.
aura::Window* capture_window = aura::client::GetCaptureWindow(window);
if (capture_window)
capture_window->ReleaseCapture();
}
}
void WindowModalityController::OnWindowDestroyed(aura::Window* window) {
windows_.erase(std::find(windows_.begin(), windows_.end(), window));
window->RemoveObserver(this);
}
} // namespace internal
} // namespace ash
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