blob: 1e5dd49b35d164715281ea60b2812a1244f09ae1 [file] [log] [blame]
// 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 "ui/wm/core/shadow_controller.h"
#include <utility>
#include "base/command_line.h"
#include "base/logging.h"
#include "base/memory/linked_ptr.h"
#include "base/scoped_observer.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/env.h"
#include "ui/aura/env_observer.h"
#include "ui/aura/window.h"
#include "ui/aura/window_observer.h"
#include "ui/base/ui_base_types.h"
#include "ui/compositor/layer.h"
#include "ui/wm/core/shadow.h"
#include "ui/wm/core/shadow_types.h"
#include "ui/wm/core/window_util.h"
#include "ui/wm/public/activation_client.h"
using std::make_pair;
namespace wm {
namespace {
ShadowType GetShadowTypeFromWindow(aura::Window* window) {
switch (window->type()) {
case ui::wm::WINDOW_TYPE_NORMAL:
case ui::wm::WINDOW_TYPE_PANEL:
case ui::wm::WINDOW_TYPE_MENU:
case ui::wm::WINDOW_TYPE_TOOLTIP:
return SHADOW_TYPE_RECTANGULAR;
default:
break;
}
return SHADOW_TYPE_NONE;
}
bool ShouldUseSmallShadowForWindow(aura::Window* window) {
switch (window->type()) {
case ui::wm::WINDOW_TYPE_MENU:
case ui::wm::WINDOW_TYPE_TOOLTIP:
return true;
default:
break;
}
return false;
}
Shadow::Style GetShadowStyleForWindow(aura::Window* window) {
return ShouldUseSmallShadowForWindow(window) ? Shadow::STYLE_SMALL :
(IsActiveWindow(window) ? Shadow::STYLE_ACTIVE : Shadow::STYLE_INACTIVE);
}
// Returns the shadow style to be applied to |losing_active| when it is losing
// active to |gaining_active|. |gaining_active| may be of a type that hides when
// inactive, and as such we do not want to render |losing_active| as inactive.
Shadow::Style GetShadowStyleForWindowLosingActive(
aura::Window* losing_active,
aura::Window* gaining_active) {
if (gaining_active && aura::client::GetHideOnDeactivate(gaining_active)) {
aura::Window::Windows::const_iterator it =
std::find(GetTransientChildren(losing_active).begin(),
GetTransientChildren(losing_active).end(),
gaining_active);
if (it != GetTransientChildren(losing_active).end())
return Shadow::STYLE_ACTIVE;
}
return Shadow::STYLE_INACTIVE;
}
} // namespace
// ShadowController::Impl ------------------------------------------------------
// Real implementation of the ShadowController. ShadowController observes
// ActivationChangeObserver, which are per ActivationClient, where as there is
// only a single Impl (as it observes all window creation by way of an
// EnvObserver).
class ShadowController::Impl :
public aura::EnvObserver,
public aura::WindowObserver,
public base::RefCounted<Impl> {
public:
// Returns the singleton instance, destroyed when there are no more refs.
static Impl* GetInstance();
// aura::EnvObserver override:
void OnWindowInitialized(aura::Window* window) override;
// aura::WindowObserver overrides:
void OnWindowPropertyChanged(aura::Window* window,
const void* key,
intptr_t old) override;
void OnWindowBoundsChanged(aura::Window* window,
const gfx::Rect& old_bounds,
const gfx::Rect& new_bounds) override;
void OnWindowDestroyed(aura::Window* window) override;
private:
friend class base::RefCounted<Impl>;
friend class ShadowController;
friend class ShadowController::TestApi;
typedef std::map<aura::Window*, linked_ptr<Shadow> > WindowShadowMap;
Impl();
~Impl() override;
// Forwarded from ShadowController.
void OnWindowActivated(ActivationReason reason,
aura::Window* gained_active,
aura::Window* lost_active);
// Checks if |window| is visible and contains a property requesting a shadow.
bool ShouldShowShadowForWindow(aura::Window* window) const;
// Returns |window|'s shadow from |window_shadows_|, or NULL if no shadow
// exists.
Shadow* GetShadowForWindow(aura::Window* window);
// Updates the shadow styles for windows when activation changes.
void HandleWindowActivationChange(aura::Window* gaining_active,
aura::Window* losing_active);
// Shows or hides |window|'s shadow as needed (creating the shadow if
// necessary).
void HandlePossibleShadowVisibilityChange(aura::Window* window);
// Creates a new shadow for |window| and stores it in |window_shadows_|. The
// shadow's bounds are initialized and it is added to the window's layer.
void CreateShadowForWindow(aura::Window* window);
WindowShadowMap window_shadows_;
ScopedObserver<aura::Window, aura::WindowObserver> observer_manager_;
static Impl* instance_;
DISALLOW_COPY_AND_ASSIGN(Impl);
};
// static
ShadowController::Impl* ShadowController::Impl::instance_ = NULL;
// static
ShadowController::Impl* ShadowController::Impl::GetInstance() {
if (!instance_)
instance_ = new Impl();
return instance_;
}
void ShadowController::Impl::OnWindowInitialized(aura::Window* window) {
observer_manager_.Add(window);
SetShadowType(window, GetShadowTypeFromWindow(window));
HandlePossibleShadowVisibilityChange(window);
}
void ShadowController::Impl::OnWindowPropertyChanged(aura::Window* window,
const void* key,
intptr_t old) {
if (key == kShadowTypeKey || key == aura::client::kShowStateKey) {
HandlePossibleShadowVisibilityChange(window);
return;
}
}
void ShadowController::Impl::OnWindowBoundsChanged(
aura::Window* window,
const gfx::Rect& old_bounds,
const gfx::Rect& new_bounds) {
Shadow* shadow = GetShadowForWindow(window);
if (shadow)
shadow->SetContentBounds(gfx::Rect(new_bounds.size()));
}
void ShadowController::Impl::OnWindowDestroyed(aura::Window* window) {
window_shadows_.erase(window);
observer_manager_.Remove(window);
}
void ShadowController::Impl::OnWindowActivated(ActivationReason reason,
aura::Window* gained_active,
aura::Window* lost_active) {
if (gained_active) {
Shadow* shadow = GetShadowForWindow(gained_active);
if (shadow && !ShouldUseSmallShadowForWindow(gained_active))
shadow->SetStyle(Shadow::STYLE_ACTIVE);
}
if (lost_active) {
Shadow* shadow = GetShadowForWindow(lost_active);
if (shadow && !ShouldUseSmallShadowForWindow(lost_active)) {
shadow->SetStyle(GetShadowStyleForWindowLosingActive(lost_active,
gained_active));
}
}
}
bool ShadowController::Impl::ShouldShowShadowForWindow(
aura::Window* window) const {
ui::WindowShowState show_state =
window->GetProperty(aura::client::kShowStateKey);
if (show_state == ui::SHOW_STATE_FULLSCREEN ||
show_state == ui::SHOW_STATE_MAXIMIZED) {
return SHADOW_TYPE_NONE;
}
const ShadowType type = GetShadowType(window);
switch (type) {
case SHADOW_TYPE_NONE:
return false;
case SHADOW_TYPE_RECTANGULAR:
return true;
default:
NOTREACHED() << "Unknown shadow type " << type;
return false;
}
}
Shadow* ShadowController::Impl::GetShadowForWindow(aura::Window* window) {
WindowShadowMap::const_iterator it = window_shadows_.find(window);
return it != window_shadows_.end() ? it->second.get() : NULL;
}
void ShadowController::Impl::HandlePossibleShadowVisibilityChange(
aura::Window* window) {
const bool should_show = ShouldShowShadowForWindow(window);
Shadow* shadow = GetShadowForWindow(window);
if (shadow) {
shadow->SetStyle(GetShadowStyleForWindow(window));
shadow->layer()->SetVisible(should_show);
} else if (should_show && !shadow) {
CreateShadowForWindow(window);
}
}
void ShadowController::Impl::CreateShadowForWindow(aura::Window* window) {
linked_ptr<Shadow> shadow(new Shadow());
window_shadows_.insert(make_pair(window, shadow));
shadow->Init(GetShadowStyleForWindow(window));
shadow->SetContentBounds(gfx::Rect(window->bounds().size()));
shadow->layer()->SetVisible(ShouldShowShadowForWindow(window));
window->layer()->Add(shadow->layer());
}
ShadowController::Impl::Impl()
: observer_manager_(this) {
aura::Env::GetInstance()->AddObserver(this);
}
ShadowController::Impl::~Impl() {
DCHECK_EQ(instance_, this);
aura::Env::GetInstance()->RemoveObserver(this);
instance_ = NULL;
}
// ShadowController ------------------------------------------------------------
ShadowController::ShadowController(
aura::client::ActivationClient* activation_client)
: activation_client_(activation_client),
impl_(Impl::GetInstance()) {
// Watch for window activation changes.
activation_client_->AddObserver(this);
}
ShadowController::~ShadowController() {
activation_client_->RemoveObserver(this);
}
void ShadowController::OnWindowActivated(ActivationReason reason,
aura::Window* gained_active,
aura::Window* lost_active) {
impl_->OnWindowActivated(reason, gained_active, lost_active);
}
// ShadowController::TestApi ---------------------------------------------------
Shadow* ShadowController::TestApi::GetShadowForWindow(aura::Window* window) {
return controller_->impl_->GetShadowForWindow(window);
}
} // namespace wm