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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_animations.h"
#include "ash/wm/window_properties.h"
#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/root_window.h"
#include "ui/aura/window.h"
#include "ui/base/events/event.h"
#include "ui/base/ui_base_types.h"
namespace ash {
namespace wm {
namespace {
bool HasAncestor(aura::Window* window, aura::Window* ancestor) {
if (!window)
return false;
if (window == ancestor)
return true;
return HasAncestor(window->parent(), ancestor);
}
bool TransientChildIsWindowModal(aura::Window* window) {
return window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_WINDOW;
}
bool TransientChildIsChildModal(aura::Window* window) {
return window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_CHILD;
}
aura::Window* GetModalParent(aura::Window* window) {
return window->GetProperty(ash::internal::kModalParentKey);
}
bool IsModalTransientChild(aura::Window* transient, aura::Window* original) {
return transient->IsVisible() &&
(TransientChildIsWindowModal(transient) ||
(TransientChildIsChildModal(transient) &&
(HasAncestor(original, GetModalParent(transient)))));
}
aura::Window* GetModalTransientChild(
aura::Window* activatable,
aura::Window* original) {
aura::Window::Windows::const_iterator it;
for (it = activatable->transient_children().begin();
it != activatable->transient_children().end();
++it) {
aura::Window* transient = *it;
if (IsModalTransientChild(transient, original)) {
return transient->transient_children().empty() ?
transient : GetModalTransientChild(transient, original);
}
}
return NULL;
}
} // namespace
void SetModalParent(aura::Window* child, aura::Window* parent) {
child->SetProperty(ash::internal::kModalParentKey, parent);
}
aura::Window* GetModalTransient(aura::Window* window) {
if (!window)
return NULL;
// We always want to check the for the transient child of the activatable
// window.
aura::Window* activatable = wm::GetActivatableWindow(window);
if (!activatable)
return NULL;
return GetModalTransientChild(activatable, 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:
ui::EventResult WindowModalityController::OnKeyEvent(ui::KeyEvent* event) {
aura::Window* target = static_cast<aura::Window*>(event->target());
return wm::GetModalTransient(target) ? ui::ER_CONSUMED :
ui::ER_UNHANDLED;
}
ui::EventResult WindowModalityController::OnMouseEvent(ui::MouseEvent* event) {
aura::Window* target = static_cast<aura::Window*>(event->target());
return ProcessLocatedEvent(target, event) ? ui::ER_CONSUMED :
ui::ER_UNHANDLED;
}
ui::EventResult WindowModalityController::OnTouchEvent(ui::TouchEvent* event) {
aura::Window* target = static_cast<aura::Window*>(event->target());
return ProcessLocatedEvent(target, event) ? ui::ER_CONSUMED :
ui::ER_UNHANDLED;
}
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);
}
bool WindowModalityController::ProcessLocatedEvent(aura::Window* target,
ui::LocatedEvent* event) {
aura::Window* modal_transient_child = wm::GetModalTransient(target);
if (modal_transient_child && (event->type() == ui::ET_MOUSE_PRESSED ||
event->type() == ui::ET_TOUCH_PRESSED)) {
ash::internal::AnimateWindow(modal_transient_child,
ash::WINDOW_ANIMATION_TYPE_BOUNCE);
}
return !!modal_transient_child;
}
} // namespace internal
} // namespace ash
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