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// Copyright (c) 2011 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 "ui/aura_shell/shadow_controller.h"
#include <utility>
#include "base/logging.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/client/shadow_types.h"
#include "ui/aura/desktop.h"
#include "ui/aura/window.h"
#include "ui/aura_shell/shadow.h"
using std::make_pair;
namespace aura_shell {
namespace internal {
ShadowController::ShadowController() {
aura::Desktop::GetInstance()->AddObserver(this);
}
ShadowController::~ShadowController() {
for (WindowShadowMap::const_iterator it = window_shadows_.begin();
it != window_shadows_.end(); ++it) {
it->first->RemoveObserver(this);
}
aura::Desktop::GetInstance()->RemoveObserver(this);
}
void ShadowController::OnWindowInitialized(aura::Window* window) {
window->AddObserver(this);
HandlePossibleShadowVisibilityChange(window);
}
void ShadowController::OnWindowPropertyChanged(aura::Window* window,
const char* name,
void* old) {
if (name == aura::kShadowTypeKey)
HandlePossibleShadowVisibilityChange(window);
}
void ShadowController::OnWindowBoundsChanged(aura::Window* window,
const gfx::Rect& bounds) {
Shadow* shadow = GetShadowForWindow(window);
if (shadow)
shadow->SetContentBounds(gfx::Rect(bounds.size()));
}
void ShadowController::OnWindowDestroyed(aura::Window* window) {
window_shadows_.erase(window);
}
bool ShadowController::ShouldShowShadowForWindow(aura::Window* window) const {
const aura::ShadowType type = static_cast<aura::ShadowType>(
window->GetIntProperty(aura::kShadowTypeKey));
switch (type) {
case aura::SHADOW_TYPE_NONE:
return false;
case aura::SHADOW_TYPE_RECTANGULAR:
return true;
default:
NOTREACHED() << "Unknown shadow type " << type;
return false;
}
}
Shadow* ShadowController::GetShadowForWindow(aura::Window* window) {
WindowShadowMap::const_iterator it = window_shadows_.find(window);
return it != window_shadows_.end() ? it->second.get() : NULL;
}
void ShadowController::HandlePossibleShadowVisibilityChange(
aura::Window* window) {
const bool should_show = ShouldShowShadowForWindow(window);
Shadow* shadow = GetShadowForWindow(window);
if (shadow)
shadow->layer()->SetVisible(should_show);
else if (should_show && !shadow)
CreateShadowForWindow(window);
}
void ShadowController::CreateShadowForWindow(aura::Window* window) {
linked_ptr<Shadow> shadow(new Shadow());
window_shadows_.insert(make_pair(window, shadow));
shadow->Init();
shadow->SetContentBounds(gfx::Rect(window->bounds().size()));
shadow->layer()->SetVisible(ShouldShowShadowForWindow(window));
window->layer()->Add(shadow->layer());
}
} // namespace internal
} // namespace aura_shell
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