content/browser/web_contents/web_contents_view_aura.h

   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 #ifndef CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_AURA_H_
   6 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_AURA_H_
   7
   8 #include <vector>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "content/browser/renderer_host/overscroll_controller_delegate.h"
  13 #include "content/common/content_export.h"
  14 #include "content/port/browser/render_view_host_delegate_view.h"
  15 #include "content/public/browser/web_contents_view.h"
  16 #include "ui/aura/client/drag_drop_delegate.h"
  17 #include "ui/aura/window_delegate.h"
  18 #include "ui/compositor/layer_animation_observer.h"
  19
  20 namespace aura {
  21 class Window;
  22 }
  23
  24 namespace ui {
  25 class DropTargetEvent;
  26 }
  27
  28 namespace content {
  29 class OverscrollNavigationOverlay;
  30 class WebContentsViewDelegate;
  31 class WebContentsImpl;
  32 class WebDragDestDelegate;
  33
  34 class CONTENT_EXPORT WebContentsViewAura
  35     : public WebContentsView,
  36       public RenderViewHostDelegateView,
  37       NON_EXPORTED_BASE(public OverscrollControllerDelegate),
  38       public ui::ImplicitAnimationObserver,
  39       public aura::WindowDelegate,
  40       public aura::client::DragDropDelegate {
  41  public:
  42   WebContentsViewAura(WebContentsImpl* web_contents,
  43                       WebContentsViewDelegate* delegate);
  44
  45  private:
  46   class WindowObserver;
  47
  48   virtual ~WebContentsViewAura();
  49
  50   void SizeChangedCommon(const gfx::Size& size);
  51
  52   void EndDrag(WebKit::WebDragOperationsMask ops);
  53
  54   // Creates and sets up the overlay window that will be displayed during the
  55   // overscroll gesture.
  56   void PrepareOverscrollWindow();
  57
  58   // Sets up the content window in preparation for starting an overscroll
  59   // gesture.
  60   void PrepareContentWindowForOverscroll();
  61
  62   // Resets any in-progress animation for the overscroll gesture. Note that this
  63   // doesn't immediately reset the internal states; that happens after an
  64   // animation.
  65   void ResetOverscrollTransform();
  66
  67   // Completes the navigation in response to a completed overscroll gesture.
  68   // The navigation happens after an animation (either the overlay window
  69   // animates in, or the content window animates out).
  70   void CompleteOverscrollNavigation(OverscrollMode mode);
  71
  72   // Returns the window that should be animated for the overscroll gesture.
  73   // (note that during the overscroll gesture, either the overlay window or the
  74   // content window can be animated).
  75   aura::Window* GetWindowToAnimateForOverscroll();
  76
  77   // Returns the amount the animating window should be translated in response to
  78   // the overscroll gesture.
  79   gfx::Vector2d GetTranslationForOverscroll(int delta_x, int delta_y);
  80
  81   // A window showing the screenshot is overlayed during a navigation triggered
  82   // by overscroll. This function sets this up.
  83   void PrepareOverscrollNavigationOverlay();
  84
  85   // Changes the brightness of the layer depending on the amount of horizontal
  86   // overscroll (|delta_x|, in pixels).
  87   void UpdateOverscrollWindowBrightness(float delta_x);
  88
  89   // Overridden from WebContentsView:
  90   virtual void CreateView(
  91       const gfx::Size& initial_size, gfx::NativeView context) OVERRIDE;
  92   virtual RenderWidgetHostView* CreateViewForWidget(
  93       RenderWidgetHost* render_widget_host) OVERRIDE;
  94   virtual RenderWidgetHostView* CreateViewForPopupWidget(
  95       RenderWidgetHost* render_widget_host) OVERRIDE;
  96   virtual gfx::NativeView GetNativeView() const OVERRIDE;
  97   virtual gfx::NativeView GetContentNativeView() const OVERRIDE;
  98   virtual gfx::NativeWindow GetTopLevelNativeWindow() const OVERRIDE;
  99   virtual void GetContainerBounds(gfx::Rect *out) const OVERRIDE;
 100   virtual void SetPageTitle(const string16& title) OVERRIDE;
 101   virtual void OnTabCrashed(base::TerminationStatus status,
 102                             int error_code) OVERRIDE;
 103   virtual void SizeContents(const gfx::Size& size) OVERRIDE;
 104   virtual void RenderViewCreated(RenderViewHost* host) OVERRIDE;
 105   virtual void Focus() OVERRIDE;
 106   virtual void SetInitialFocus() OVERRIDE;
 107   virtual void StoreFocus() OVERRIDE;
 108   virtual void RestoreFocus() OVERRIDE;
 109   virtual WebDropData* GetDropData() const OVERRIDE;
 110   virtual bool IsEventTracking() const OVERRIDE;
 111   virtual void CloseTabAfterEventTracking() OVERRIDE;
 112   virtual gfx::Rect GetViewBounds() const OVERRIDE;
 113
 114   // Overridden from RenderViewHostDelegateView:
 115   virtual void ShowContextMenu(
 116       const ContextMenuParams& params,
 117       ContextMenuSourceType type) OVERRIDE;
 118   virtual void ShowPopupMenu(const gfx::Rect& bounds,
 119                              int item_height,
 120                              double item_font_size,
 121                              int selected_item,
 122                              const std::vector<WebMenuItem>& items,
 123                              bool right_aligned,
 124                              bool allow_multiple_selection) OVERRIDE;
 125   virtual void StartDragging(const WebDropData& drop_data,
 126                              WebKit::WebDragOperationsMask operations,
 127                              const gfx::ImageSkia& image,
 128                              const gfx::Vector2d& image_offset,
 129                              const DragEventSourceInfo& event_info) OVERRIDE;
 130   virtual void UpdateDragCursor(WebKit::WebDragOperation operation) OVERRIDE;
 131   virtual void GotFocus() OVERRIDE;
 132   virtual void TakeFocus(bool reverse) OVERRIDE;
 133
 134   // Overridden from OverscrollControllerDelegate:
 135   virtual void OnOverscrollUpdate(float delta_x, float delta_y) OVERRIDE;
 136   virtual void OnOverscrollComplete(OverscrollMode overscroll_mode) OVERRIDE;
 137   virtual void OnOverscrollModeChange(OverscrollMode old_mode,
 138                                       OverscrollMode new_mode) OVERRIDE;
 139
 140   // Overridden from ui::ImplicitAnimationObserver:
 141   virtual void OnImplicitAnimationsCompleted() OVERRIDE;
 142
 143   // Overridden from aura::WindowDelegate:
 144   virtual gfx::Size GetMinimumSize() const OVERRIDE;
 145   virtual gfx::Size GetMaximumSize() const OVERRIDE;
 146   virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
 147                                const gfx::Rect& new_bounds) OVERRIDE;
 148   virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE;
 149   virtual int GetNonClientComponent(const gfx::Point& point) const OVERRIDE;
 150   virtual bool ShouldDescendIntoChildForEventHandling(
 151       aura::Window* child,
 152       const gfx::Point& location) OVERRIDE;
 153   virtual bool CanFocus() OVERRIDE;
 154   virtual void OnCaptureLost() OVERRIDE;
 155   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
 156   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
 157   virtual void OnWindowDestroying() OVERRIDE;
 158   virtual void OnWindowDestroyed() OVERRIDE;
 159   virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE;
 160   virtual bool HasHitTestMask() const OVERRIDE;
 161   virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE;
 162   virtual scoped_refptr<ui::Texture> CopyTexture() OVERRIDE;
 163
 164   // Overridden from ui::EventHandler:
 165   virtual void OnKeyEvent(ui::KeyEvent* event) OVERRIDE;
 166   virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
 167
 168   // Overridden from aura::client::DragDropDelegate:
 169   virtual void OnDragEntered(const ui::DropTargetEvent& event) OVERRIDE;
 170   virtual int OnDragUpdated(const ui::DropTargetEvent& event) OVERRIDE;
 171   virtual void OnDragExited() OVERRIDE;
 172   virtual int OnPerformDrop(const ui::DropTargetEvent& event) OVERRIDE;
 173
 174   scoped_ptr<aura::Window> window_;
 175   scoped_ptr<aura::Window> overscroll_window_;
 176
 177   scoped_ptr<WindowObserver> window_observer_;
 178
 179   // The WebContentsImpl whose contents we display.
 180   WebContentsImpl* web_contents_;
 181
 182   scoped_ptr<WebContentsViewDelegate> delegate_;
 183
 184   WebKit::WebDragOperationsMask current_drag_op_;
 185
 186   scoped_ptr<WebDropData> current_drop_data_;
 187
 188   WebDragDestDelegate* drag_dest_delegate_;
 189
 190   // We keep track of the render view host we're dragging over.  If it changes
 191   // during a drag, we need to re-send the DragEnter message.  WARNING:
 192   // this pointer should never be dereferenced.  We only use it for comparing
 193   // pointers.
 194   void* current_rvh_for_drag_;
 195
 196   bool overscroll_change_brightness_;
 197
 198   // The overscroll gesture currently in progress.
 199   OverscrollMode current_overscroll_gesture_;
 200
 201   // This is the completed overscroll gesture. This is used for the animation
 202   // callback that happens in response to a completed overscroll gesture.
 203   OverscrollMode completed_overscroll_gesture_;
 204
 205   // This manages the overlay window that shows the screenshot during a history
 206   // navigation triggered by the overscroll gesture.
 207   scoped_ptr<OverscrollNavigationOverlay> navigation_overlay_;
 208
 209   DISALLOW_COPY_AND_ASSIGN(WebContentsViewAura);
 210 };
 211
 212 }  // namespace content
 213
 214 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_AURA_H_