src/ui/views/controls/native/native_view_host_aura.cc

   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 "ui/views/controls/native/native_view_host_aura.h"
   6
   7 #include "base/logging.h"
   8 #include "ui/aura/client/aura_constants.h"
   9 #include "ui/aura/client/focus_client.h"
  10 #include "ui/aura/window.h"
  11 #include "ui/aura/window_delegate.h"
  12 #include "ui/base/cursor/cursor.h"
  13 #include "ui/base/hit_test.h"
  14 #include "ui/views/controls/native/native_view_host.h"
  15 #include "ui/views/view_constants_aura.h"
  16 #include "ui/views/widget/widget.h"
  17
  18 namespace views {
  19
  20 class NativeViewHostAura::ClippingWindowDelegate : public aura::WindowDelegate {
  21  public:
  22   ClippingWindowDelegate() : native_view_(NULL) {}
  23   virtual ~ClippingWindowDelegate() {}
  24
  25   void set_native_view(aura::Window* native_view) {
  26     native_view_ = native_view;
  27   }
  28
  29   virtual gfx::Size GetMinimumSize() const OVERRIDE { return gfx::Size(); }
  30   virtual gfx::Size GetMaximumSize() const OVERRIDE { return gfx::Size(); }
  31   virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
  32                                const gfx::Rect& new_bounds) OVERRIDE {}
  33   virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE {
  34     return gfx::kNullCursor;
  35   }
  36   virtual int GetNonClientComponent(const gfx::Point& point) const OVERRIDE {
  37     return HTCLIENT;
  38   }
  39   virtual bool ShouldDescendIntoChildForEventHandling(
  40       aura::Window* child,
  41       const gfx::Point& location) OVERRIDE { return true; }
  42   virtual bool CanFocus() OVERRIDE {
  43     // Ask the hosted native view's delegate because directly calling
  44     // aura::Window::CanFocus() will call back into this when checking whether
  45     // parents can focus.
  46     return native_view_ && native_view_->delegate()
  47         ? native_view_->delegate()->CanFocus()
  48         : true;
  49   }
  50   virtual void OnCaptureLost() OVERRIDE {}
  51   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {}
  52   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE {}
  53   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE {}
  54   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE {}
  55   virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE {}
  56   virtual bool HasHitTestMask() const OVERRIDE { return false; }
  57   virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE {}
  58
  59  private:
  60   aura::Window* native_view_;
  61 };
  62
  63 NativeViewHostAura::NativeViewHostAura(NativeViewHost* host)
  64     : host_(host),
  65       clipping_window_delegate_(new ClippingWindowDelegate()),
  66       clipping_window_(clipping_window_delegate_.get()) {
  67   // Set the type so descendant views (including popups) get positioned
  68   // appropriately.
  69   clipping_window_.SetType(ui::wm::WINDOW_TYPE_CONTROL);
  70   clipping_window_.Init(aura::WINDOW_LAYER_NOT_DRAWN);
  71   clipping_window_.set_owned_by_parent(false);
  72   clipping_window_.SetName("NativeViewHostAuraClip");
  73   clipping_window_.layer()->SetMasksToBounds(true);
  74   clipping_window_.SetProperty(views::kHostViewKey, static_cast<View*>(host_));
  75 }
  76
  77 NativeViewHostAura::~NativeViewHostAura() {
  78   if (host_->native_view()) {
  79     host_->native_view()->RemoveObserver(this);
  80     host_->native_view()->ClearProperty(views::kHostViewKey);
  81     host_->native_view()->ClearProperty(aura::client::kHostWindowKey);
  82     clipping_window_.ClearProperty(views::kHostViewKey);
  83     if (host_->native_view()->parent() == &clipping_window_)
  84       clipping_window_.RemoveChild(host_->native_view());
  85   }
  86 }
  87
  88 ////////////////////////////////////////////////////////////////////////////////
  89 // NativeViewHostAura, NativeViewHostWrapper implementation:
  90 void NativeViewHostAura::AttachNativeView() {
  91   clipping_window_delegate_->set_native_view(host_->native_view());
  92   host_->native_view()->AddObserver(this);
  93   host_->native_view()->SetProperty(views::kHostViewKey,
  94       static_cast<View*>(host_));
  95   AddClippingWindow();
  96 }
  97
  98 void NativeViewHostAura::NativeViewDetaching(bool destroyed) {
  99   clipping_window_delegate_->set_native_view(NULL);
 100   RemoveClippingWindow();
 101   if (!destroyed) {
 102     host_->native_view()->RemoveObserver(this);
 103     host_->native_view()->ClearProperty(views::kHostViewKey);
 104     host_->native_view()->ClearProperty(aura::client::kHostWindowKey);
 105     host_->native_view()->Hide();
 106     if (host_->native_view()->parent())
 107       Widget::ReparentNativeView(host_->native_view(), NULL);
 108   }
 109 }
 110
 111 void NativeViewHostAura::AddedToWidget() {
 112   if (!host_->native_view())
 113     return;
 114
 115   AddClippingWindow();
 116   if (host_->IsDrawn())
 117     host_->native_view()->Show();
 118   else
 119     host_->native_view()->Hide();
 120   host_->Layout();
 121 }
 122
 123 void NativeViewHostAura::RemovedFromWidget() {
 124   if (host_->native_view()) {
 125     host_->native_view()->Hide();
 126     host_->native_view()->ClearProperty(aura::client::kHostWindowKey);
 127     if (host_->native_view()->parent())
 128       host_->native_view()->parent()->RemoveChild(host_->native_view());
 129     RemoveClippingWindow();
 130   }
 131 }
 132
 133 void NativeViewHostAura::InstallClip(int x, int y, int w, int h) {
 134   clip_rect_.reset(
 135       new gfx::Rect(host_->ConvertRectToWidget(gfx::Rect(x, y, w, h))));
 136 }
 137
 138 bool NativeViewHostAura::HasInstalledClip() {
 139   return clip_rect_;
 140 }
 141
 142 void NativeViewHostAura::UninstallClip() {
 143   clip_rect_.reset();
 144 }
 145
 146 void NativeViewHostAura::ShowWidget(int x, int y, int w, int h) {
 147   int width = w;
 148   int height = h;
 149   if (host_->fast_resize()) {
 150     gfx::Point origin(x, y);
 151     views::View::ConvertPointFromWidget(host_, &origin);
 152     InstallClip(origin.x(), origin.y(), w, h);
 153     width = host_->native_view()->bounds().width();
 154     height = host_->native_view()->bounds().height();
 155   }
 156   clipping_window_.SetBounds(clip_rect_ ? *clip_rect_
 157                                         : gfx::Rect(x, y, w, h));
 158
 159   gfx::Point clip_offset = clipping_window_.bounds().origin();
 160   host_->native_view()->SetBounds(
 161       gfx::Rect(x - clip_offset.x(), y - clip_offset.y(), width, height));
 162   host_->native_view()->Show();
 163   clipping_window_.Show();
 164 }
 165
 166 void NativeViewHostAura::HideWidget() {
 167   host_->native_view()->Hide();
 168   clipping_window_.Hide();
 169 }
 170
 171 void NativeViewHostAura::SetFocus() {
 172   aura::Window* window = host_->native_view();
 173   aura::client::FocusClient* client = aura::client::GetFocusClient(window);
 174   if (client)
 175     client->FocusWindow(window);
 176 }
 177
 178 gfx::NativeViewAccessible NativeViewHostAura::GetNativeViewAccessible() {
 179   return NULL;
 180 }
 181
 182 gfx::NativeCursor NativeViewHostAura::GetCursor(int x, int y) {
 183   if (host_->native_view())
 184     return host_->native_view()->GetCursor(gfx::Point(x, y));
 185   return gfx::kNullCursor;
 186 }
 187
 188 void NativeViewHostAura::OnWindowDestroying(aura::Window* window) {
 189   DCHECK(window == host_->native_view());
 190   clipping_window_delegate_->set_native_view(NULL);
 191 }
 192
 193 void NativeViewHostAura::OnWindowDestroyed(aura::Window* window) {
 194   DCHECK(window == host_->native_view());
 195   host_->NativeViewDestroyed();
 196 }
 197
 198 // static
 199 NativeViewHostWrapper* NativeViewHostWrapper::CreateWrapper(
 200     NativeViewHost* host) {
 201   return new NativeViewHostAura(host);
 202 }
 203
 204 void NativeViewHostAura::AddClippingWindow() {
 205   RemoveClippingWindow();
 206
 207   host_->native_view()->SetProperty(aura::client::kHostWindowKey,
 208                                     host_->GetWidget()->GetNativeView());
 209   Widget::ReparentNativeView(host_->native_view(),
 210                              &clipping_window_);
 211   if (host_->GetWidget()->GetNativeView()) {
 212     Widget::ReparentNativeView(&clipping_window_,
 213                                host_->GetWidget()->GetNativeView());
 214   }
 215 }
 216
 217 void NativeViewHostAura::RemoveClippingWindow() {
 218   clipping_window_.Hide();
 219   if (host_->native_view())
 220     host_->native_view()->ClearProperty(aura::client::kHostWindowKey);
 221
 222   if (host_->native_view()->parent() == &clipping_window_) {
 223     if (host_->GetWidget() && host_->GetWidget()->GetNativeView()) {
 224       Widget::ReparentNativeView(host_->native_view(),
 225                                  host_->GetWidget()->GetNativeView());
 226     } else {
 227       clipping_window_.RemoveChild(host_->native_view());
 228     }
 229     host_->native_view()->SetBounds(clipping_window_.bounds());
 230   }
 231   if (clipping_window_.parent())
 232     clipping_window_.parent()->RemoveChild(&clipping_window_);
 233 }
 234
 235 }  // namespace views