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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "ash/wm/resize_shadow_controller.h"
      6 
      7 #include <utility>
      8 
      9 #include "ash/wm/resize_shadow.h"
     10 #include "ui/aura/window.h"
     11 
     12 namespace ash {
     13 namespace internal {
     14 
     15 ResizeShadowController::ResizeShadowController() {
     16 }
     17 
     18 ResizeShadowController::~ResizeShadowController() {
     19   for (WindowShadowMap::const_iterator it = window_shadows_.begin();
     20        it != window_shadows_.end(); ++it) {
     21     it->first->RemoveObserver(this);
     22   }
     23 }
     24 
     25 void ResizeShadowController::ShowShadow(aura::Window* window, int hit_test) {
     26   ResizeShadow* shadow = GetShadowForWindow(window);
     27   if (!shadow)
     28     shadow = CreateShadow(window);
     29   shadow->ShowForHitTest(hit_test);
     30 }
     31 
     32 void ResizeShadowController::HideShadow(aura::Window* window) {
     33   ResizeShadow* shadow = GetShadowForWindow(window);
     34   if (shadow)
     35     shadow->Hide();
     36 }
     37 
     38 ResizeShadow* ResizeShadowController::GetShadowForWindowForTest(
     39     aura::Window* window) {
     40   return GetShadowForWindow(window);
     41 }
     42 
     43 void ResizeShadowController::OnWindowBoundsChanged(
     44     aura::Window* window,
     45     const gfx::Rect& old_bounds,
     46     const gfx::Rect& new_bounds) {
     47   ResizeShadow* shadow = GetShadowForWindow(window);
     48   if (shadow)
     49     shadow->Layout(new_bounds);
     50 }
     51 
     52 void ResizeShadowController::OnWindowDestroyed(aura::Window* window) {
     53   window_shadows_.erase(window);
     54 }
     55 
     56 ResizeShadow* ResizeShadowController::CreateShadow(aura::Window* window) {
     57   linked_ptr<ResizeShadow> shadow(new ResizeShadow());
     58   window_shadows_.insert(std::make_pair(window, shadow));
     59   // Attach the layers to this window.
     60   shadow->Init(window);
     61   // Ensure initial bounds are correct.
     62   shadow->Layout(window->bounds());
     63   // Watch for bounds changes.
     64   window->AddObserver(this);
     65   return shadow.get();
     66 }
     67 
     68 ResizeShadow* ResizeShadowController::GetShadowForWindow(aura::Window* window) {
     69   WindowShadowMap::const_iterator it = window_shadows_.find(window);
     70   return it != window_shadows_.end() ? it->second.get() : NULL;
     71 }
     72 
     73 }  // namespace internal
     74 }  // namespace ash
     75