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/browser/renderer_host/render_view_host_delegate_view.h"
  14 #include "content/browser/web_contents/web_contents_view.h"
  15 #include "content/common/content_export.h"
  16 #include "ui/aura/window_delegate.h"
  17 #include "ui/compositor/layer_animation_observer.h"
  18 #include "ui/wm/public/drag_drop_delegate.h"
  19
  20 namespace aura {
  21 class Window;
  22 }
  23
  24 namespace ui {
  25 class DropTargetEvent;
  26 }
  27
  28 namespace content {
  29 class GestureNavSimple;
  30 class OverscrollNavigationOverlay;
  31 class RenderWidgetHostImpl;
  32 class ShadowLayerDelegate;
  33 class TouchEditableImplAura;
  34 class WebContentsViewDelegate;
  35 class WebContentsImpl;
  36 class WebDragDestDelegate;
  37
  38 class WebContentsViewAura
  39     : public WebContentsView,
  40       public RenderViewHostDelegateView,
  41       public OverscrollControllerDelegate,
  42       public ui::ImplicitAnimationObserver,
  43       public aura::WindowDelegate,
  44       public aura::client::DragDropDelegate {
  45  public:
  46   WebContentsViewAura(WebContentsImpl* web_contents,
  47                       WebContentsViewDelegate* delegate);
  48
  49   CONTENT_EXPORT void SetupOverlayWindowForTesting();
  50
  51   CONTENT_EXPORT void SetTouchEditableForTest(
  52       TouchEditableImplAura* touch_editable);
  53
  54  private:
  55   class WindowObserver;
  56
  57   virtual ~WebContentsViewAura();
  58
  59   void SizeChangedCommon(const gfx::Size& size);
  60
  61   void EndDrag(blink::WebDragOperationsMask ops);
  62
  63   void InstallOverscrollControllerDelegate(RenderWidgetHostImpl* host);
  64
  65   // Creates and sets up the overlay window that will be displayed during the
  66   // overscroll gesture.
  67   void PrepareOverscrollWindow();
  68
  69   // Sets up the content window in preparation for starting an overscroll
  70   // gesture.
  71   void PrepareContentWindowForOverscroll();
  72
  73   // Resets any in-progress animation for the overscroll gesture. Note that this
  74   // doesn't immediately reset the internal states; that happens after an
  75   // animation.
  76   void ResetOverscrollTransform();
  77
  78   // Completes the navigation in response to a completed overscroll gesture.
  79   // The navigation happens after an animation (either the overlay window
  80   // animates in, or the content window animates out).
  81   void CompleteOverscrollNavigation(OverscrollMode mode);
  82
  83   // Returns the window that should be animated for the overscroll gesture.
  84   // (note that during the overscroll gesture, either the overlay window or the
  85   // content window can be animated).
  86   aura::Window* GetWindowToAnimateForOverscroll();
  87
  88   // Returns the amount the animating window should be translated in response to
  89   // the overscroll gesture.
  90   gfx::Vector2d GetTranslationForOverscroll(int delta_x, int delta_y);
  91
  92   // A window showing the screenshot is overlayed during a navigation triggered
  93   // by overscroll. This function sets this up.
  94   void PrepareOverscrollNavigationOverlay();
  95
  96   // Changes the brightness of the layer depending on the amount of horizontal
  97   // overscroll (|delta_x|, in pixels).
  98   void UpdateOverscrollWindowBrightness(float delta_x);
  99
 100   void AttachTouchEditableToRenderView();
 101
 102   void OverscrollUpdateForWebContentsDelegate(int delta_y);
 103
 104   // Overridden from WebContentsView:
 105   virtual gfx::NativeView GetNativeView() const OVERRIDE;
 106   virtual gfx::NativeView GetContentNativeView() const OVERRIDE;
 107   virtual gfx::NativeWindow GetTopLevelNativeWindow() const OVERRIDE;
 108   virtual void GetContainerBounds(gfx::Rect *out) const OVERRIDE;
 109   virtual void SizeContents(const gfx::Size& size) OVERRIDE;
 110   virtual void Focus() OVERRIDE;
 111   virtual void SetInitialFocus() OVERRIDE;
 112   virtual void StoreFocus() OVERRIDE;
 113   virtual void RestoreFocus() OVERRIDE;
 114   virtual DropData* GetDropData() const OVERRIDE;
 115   virtual gfx::Rect GetViewBounds() const OVERRIDE;
 116   virtual void CreateView(
 117       const gfx::Size& initial_size, gfx::NativeView context) OVERRIDE;
 118   virtual RenderWidgetHostViewBase* CreateViewForWidget(
 119       RenderWidgetHost* render_widget_host) OVERRIDE;
 120   virtual RenderWidgetHostViewBase* CreateViewForPopupWidget(
 121       RenderWidgetHost* render_widget_host) OVERRIDE;
 122   virtual void SetPageTitle(const base::string16& title) OVERRIDE;
 123   virtual void RenderViewCreated(RenderViewHost* host) OVERRIDE;
 124   virtual void RenderViewSwappedIn(RenderViewHost* host) OVERRIDE;
 125   virtual void SetOverscrollControllerEnabled(bool enabled) OVERRIDE;
 126
 127   // Overridden from RenderViewHostDelegateView:
 128   virtual void ShowContextMenu(RenderFrameHost* render_frame_host,
 129                                const ContextMenuParams& params) OVERRIDE;
 130   virtual void StartDragging(const DropData& drop_data,
 131                              blink::WebDragOperationsMask operations,
 132                              const gfx::ImageSkia& image,
 133                              const gfx::Vector2d& image_offset,
 134                              const DragEventSourceInfo& event_info) OVERRIDE;
 135   virtual void UpdateDragCursor(blink::WebDragOperation operation) OVERRIDE;
 136   virtual void GotFocus() OVERRIDE;
 137   virtual void TakeFocus(bool reverse) OVERRIDE;
 138
 139   // Overridden from OverscrollControllerDelegate:
 140   virtual gfx::Rect GetVisibleBounds() const OVERRIDE;
 141   virtual void OnOverscrollUpdate(float delta_x, float delta_y) OVERRIDE;
 142   virtual void OnOverscrollComplete(OverscrollMode overscroll_mode) OVERRIDE;
 143   virtual void OnOverscrollModeChange(OverscrollMode old_mode,
 144                                       OverscrollMode new_mode) OVERRIDE;
 145
 146   // Overridden from ui::ImplicitAnimationObserver:
 147   virtual void OnImplicitAnimationsCompleted() OVERRIDE;
 148
 149   // Overridden from aura::WindowDelegate:
 150   virtual gfx::Size GetMinimumSize() const OVERRIDE;
 151   virtual gfx::Size GetMaximumSize() const OVERRIDE;
 152   virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
 153                                const gfx::Rect& new_bounds) OVERRIDE;
 154   virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE;
 155   virtual int GetNonClientComponent(const gfx::Point& point) const OVERRIDE;
 156   virtual bool ShouldDescendIntoChildForEventHandling(
 157       aura::Window* child,
 158       const gfx::Point& location) OVERRIDE;
 159   virtual bool CanFocus() OVERRIDE;
 160   virtual void OnCaptureLost() OVERRIDE;
 161   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
 162   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
 163   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
 164   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
 165   virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE;
 166   virtual bool HasHitTestMask() const OVERRIDE;
 167   virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE;
 168
 169   // Overridden from ui::EventHandler:
 170   virtual void OnKeyEvent(ui::KeyEvent* event) OVERRIDE;
 171   virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
 172
 173   // Overridden from aura::client::DragDropDelegate:
 174   virtual void OnDragEntered(const ui::DropTargetEvent& event) OVERRIDE;
 175   virtual int OnDragUpdated(const ui::DropTargetEvent& event) OVERRIDE;
 176   virtual void OnDragExited() OVERRIDE;
 177   virtual int OnPerformDrop(const ui::DropTargetEvent& event) OVERRIDE;
 178
 179   scoped_ptr<aura::Window> window_;
 180
 181   // The window that shows the screenshot of the history page during an
 182   // overscroll navigation gesture.
 183   scoped_ptr<aura::Window> overscroll_window_;
 184
 185   scoped_ptr<WindowObserver> window_observer_;
 186
 187   // The WebContentsImpl whose contents we display.
 188   WebContentsImpl* web_contents_;
 189
 190   scoped_ptr<WebContentsViewDelegate> delegate_;
 191
 192   blink::WebDragOperationsMask current_drag_op_;
 193
 194   scoped_ptr<DropData> current_drop_data_;
 195
 196   WebDragDestDelegate* drag_dest_delegate_;
 197
 198   // We keep track of the render view host we're dragging over.  If it changes
 199   // during a drag, we need to re-send the DragEnter message.  WARNING:
 200   // this pointer should never be dereferenced.  We only use it for comparing
 201   // pointers.
 202   void* current_rvh_for_drag_;
 203
 204   bool overscroll_change_brightness_;
 205
 206   // The overscroll gesture currently in progress.
 207   OverscrollMode current_overscroll_gesture_;
 208
 209   // This is the completed overscroll gesture. This is used for the animation
 210   // callback that happens in response to a completed overscroll gesture.
 211   OverscrollMode completed_overscroll_gesture_;
 212
 213   // This manages the overlay window that shows the screenshot during a history
 214   // navigation triggered by the overscroll gesture.
 215   scoped_ptr<OverscrollNavigationOverlay> navigation_overlay_;
 216
 217   scoped_ptr<ShadowLayerDelegate> overscroll_shadow_;
 218
 219   scoped_ptr<TouchEditableImplAura> touch_editable_;
 220   scoped_ptr<GestureNavSimple> gesture_nav_simple_;
 221
 222   DISALLOW_COPY_AND_ASSIGN(WebContentsViewAura);
 223 };
 224
 225 }  // namespace content
 226
 227 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_AURA_H_