Move shadow code to views\corewm

ash/wm/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 "ash/wm/shadow_controller.h"
-
-#include <utility>
-
-#include "ash/shell.h"
-#include "ash/wm/shadow.h"
-#include "ash/wm/shadow_types.h"
-#include "ash/wm/window_properties.h"
-#include "base/command_line.h"
-#include "base/logging.h"
-#include "ui/aura/client/activation_client.h"
-#include "ui/aura/env.h"
-#include "ui/aura/root_window.h"
-#include "ui/aura/window.h"
-#include "ui/compositor/layer.h"
-
-using std::make_pair;
-
-namespace ash {
-namespace internal {
-
-namespace {
-
-ShadowType GetShadowTypeFromWindow(aura::Window* window) {
-  switch (window->type()) {
-    case aura::client::WINDOW_TYPE_NORMAL:
-    case aura::client::WINDOW_TYPE_PANEL:
-    case aura::client::WINDOW_TYPE_MENU:
-    case aura::client::WINDOW_TYPE_TOOLTIP:
-      return SHADOW_TYPE_RECTANGULAR;
-    default:
-      break;
-  }
-  return SHADOW_TYPE_NONE;
-}
-
-bool ShouldUseSmallShadowForWindow(aura::Window* window) {
-  switch (window->type()) {
-    case aura::client::WINDOW_TYPE_MENU:
-    case aura::client::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(losing_active->transient_children().begin(),
-                  losing_active->transient_children().end(),
-                  gaining_active);
-    if (it != losing_active->transient_children().end())
-      return Shadow::STYLE_ACTIVE;
-  }
-  return Shadow::STYLE_INACTIVE;
-}
-
-}  // namespace
-
-ShadowController::ShadowController()
-    : ALLOW_THIS_IN_INITIALIZER_LIST(observer_manager_(this)) {
-  aura::Env::GetInstance()->AddObserver(this);
-  // Watch for window activation changes.
-  aura::client::GetActivationClient(Shell::GetPrimaryRootWindow())->
-      AddObserver(this);
-}
-
-ShadowController::~ShadowController() {
-  aura::client::GetActivationClient(Shell::GetPrimaryRootWindow())->
-      RemoveObserver(this);
-  aura::Env::GetInstance()->RemoveObserver(this);
-}
-
-void ShadowController::OnWindowInitialized(aura::Window* window) {
-  observer_manager_.Add(window);
-  SetShadowType(window, GetShadowTypeFromWindow(window));
-  HandlePossibleShadowVisibilityChange(window);
-}
-
-void ShadowController::OnWindowPropertyChanged(aura::Window* window,
-                                               const void* key,
-                                               intptr_t old) {
-  if (key == kShadowTypeKey) {
-    HandlePossibleShadowVisibilityChange(window);
-    return;
-  }
-}
-
-void ShadowController::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::OnWindowDestroyed(aura::Window* window) {
-  window_shadows_.erase(window);
-  observer_manager_.Remove(window);
-}
-
-void ShadowController::OnWindowActivated(aura::Window* gaining_active,
-                                         aura::Window* losing_active) {
-  if (gaining_active) {
-    Shadow* shadow = GetShadowForWindow(gaining_active);
-    if (shadow && !ShouldUseSmallShadowForWindow(gaining_active))
-      shadow->SetStyle(Shadow::STYLE_ACTIVE);
-  }
-  if (losing_active) {
-    Shadow* shadow = GetShadowForWindow(losing_active);
-    if (shadow && !ShouldUseSmallShadowForWindow(losing_active)) {
-      shadow->SetStyle(GetShadowStyleForWindowLosingActive(losing_active,
-                                                           gaining_active));
-    }
-  }
-}
-
-bool ShadowController::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::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(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());
-}
-
-}  // namespace internal
-}  // namespace ash