Move files from ui/views/corewm to ui/wm/core

ui/views/corewm/shadow_controller.cc

-// 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/views/corewm/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/activation_client.h"
-#include "ui/aura/env.h"
-#include "ui/aura/env_observer.h"
-#include "ui/aura/window.h"
-#include "ui/aura/window_event_dispatcher.h"
-#include "ui/aura/window_observer.h"
-#include "ui/compositor/layer.h"
-#include "ui/views/corewm/shadow.h"
-#include "ui/views/corewm/shadow_types.h"
-#include "ui/views/corewm/window_util.h"
-
-using std::make_pair;
-
-namespace views {
-namespace corewm {
-
-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;
-}
-
-// 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:
-  virtual void OnWindowInitialized(aura::Window* window) OVERRIDE;
-
-  // aura::WindowObserver overrides:
-  virtual void OnWindowPropertyChanged(
-      aura::Window* window, const void* key, intptr_t old) OVERRIDE;
-  virtual void OnWindowBoundsChanged(
-      aura::Window* window,
-      const gfx::Rect& old_bounds,
-      const gfx::Rect& new_bounds) OVERRIDE;
-  virtual 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();
-  virtual ~Impl();
-
-  // Forwarded from ShadowController.
-  void OnWindowActivated(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) {
-    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(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 {
-  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->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(ShouldUseSmallShadowForWindow(window) ?
-               Shadow::STYLE_SMALL : Shadow::STYLE_ACTIVE);
-  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(aura::Window* gained_active,
-                                         aura::Window* lost_active) {
-  impl_->OnWindowActivated(gained_active, lost_active);
-}
-
-// ShadowController::TestApi ---------------------------------------------------
-
-Shadow* ShadowController::TestApi::GetShadowForWindow(aura::Window* window) {
-  return controller_->impl_->GetShadowForWindow(window);
-}
-
-}  // namespace corewm
-}  // namespace views