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/aura/window_observer.h"
  18 #include "ui/compositor/layer_animation_observer.h"
  19 #include "ui/wm/public/drag_drop_delegate.h"
  20
  21 namespace aura {
  22 class Window;
  23 }
  24
  25 namespace ui {
  26 class DropTargetEvent;
  27 }
  28
  29 namespace content {
  30 class GestureNavSimple;
  31 class OverscrollNavigationOverlay;
  32 class RenderWidgetHostImpl;
  33 class RenderWidgetHostViewAura;
  34 class ShadowLayerDelegate;
  35 class TouchEditableImplAura;
  36 class WebContentsViewDelegate;
  37 class WebContentsImpl;
  38 class WebDragDestDelegate;
  39
  40 class WebContentsViewAura
  41     : public WebContentsView,
  42       public RenderViewHostDelegateView,
  43       public OverscrollControllerDelegate,
  44       public ui::ImplicitAnimationObserver,
  45       public aura::WindowDelegate,
  46       public aura::client::DragDropDelegate,
  47       public aura::WindowObserver {
  48  public:
  49   WebContentsViewAura(WebContentsImpl* web_contents,
  50                       WebContentsViewDelegate* delegate);
  51
  52   CONTENT_EXPORT void SetTouchEditableForTest(
  53       TouchEditableImplAura* touch_editable);
  54
  55  private:
  56   class WindowObserver;
  57
  58   ~WebContentsViewAura() override;
  59
  60   void SizeChangedCommon(const gfx::Size& size);
  61
  62   void EndDrag(blink::WebDragOperationsMask ops);
  63
  64   void InstallOverscrollControllerDelegate(RenderWidgetHostViewAura* view);
  65
  66   // Creates and sets up the overlay window that will be displayed during the
  67   // overscroll gesture.
  68   void PrepareOverscrollWindow();
  69
  70   // Sets up the content window in preparation for starting an overscroll
  71   // gesture.
  72   void PrepareContentWindowForOverscroll();
  73
  74   // Resets any in-progress animation for the overscroll gesture. Note that this
  75   // doesn't immediately reset the internal states; that happens after an
  76   // animation.
  77   void ResetOverscrollTransform();
  78
  79   // Completes the navigation in response to a completed overscroll gesture.
  80   // The navigation happens after an animation (either the overlay window
  81   // animates in, or the content window animates out).
  82   void CompleteOverscrollNavigation(OverscrollMode mode);
  83
  84   // Returns the window that should be animated for the overscroll gesture.
  85   // (note that during the overscroll gesture, either the overlay window or the
  86   // content window can be animated).
  87   aura::Window* GetWindowToAnimateForOverscroll();
  88
  89   // Returns the amount the animating window should be translated in response to
  90   // the overscroll gesture.
  91   gfx::Vector2dF GetTranslationForOverscroll(float delta_x, float delta_y);
  92
  93   // A window showing the screenshot is overlayed during a navigation triggered
  94   // by overscroll. This function sets this up.
  95   void PrepareOverscrollNavigationOverlay();
  96
  97   // Changes the brightness of the layer depending on the amount of horizontal
  98   // overscroll (|delta_x|, in pixels).
  99   void UpdateOverscrollWindowBrightness(float delta_x);
 100
 101   void AttachTouchEditableToRenderView();
 102
 103   void OverscrollUpdateForWebContentsDelegate(float delta_y);
 104
 105   // Overridden from WebContentsView:
 106   gfx::NativeView GetNativeView() const override;
 107   gfx::NativeView GetContentNativeView() const override;
 108   gfx::NativeWindow GetTopLevelNativeWindow() const override;
 109   void GetContainerBounds(gfx::Rect* out) const override;
 110   void SizeContents(const gfx::Size& size) override;
 111   void Focus() override;
 112   void SetInitialFocus() override;
 113   void StoreFocus() override;
 114   void RestoreFocus() override;
 115   DropData* GetDropData() const override;
 116   gfx::Rect GetViewBounds() const override;
 117   void CreateView(const gfx::Size& initial_size,
 118                   gfx::NativeView context) override;
 119   RenderWidgetHostViewBase* CreateViewForWidget(
 120       RenderWidgetHost* render_widget_host,
 121       bool is_guest_view_hack) override;
 122   RenderWidgetHostViewBase* CreateViewForPopupWidget(
 123       RenderWidgetHost* render_widget_host) override;
 124   void SetPageTitle(const base::string16& title) override;
 125   void RenderViewCreated(RenderViewHost* host) override;
 126   void RenderViewSwappedIn(RenderViewHost* host) override;
 127   void SetOverscrollControllerEnabled(bool enabled) override;
 128
 129   // Overridden from RenderViewHostDelegateView:
 130   void ShowContextMenu(RenderFrameHost* render_frame_host,
 131                        const ContextMenuParams& params) override;
 132   void StartDragging(const DropData& drop_data,
 133                      blink::WebDragOperationsMask operations,
 134                      const gfx::ImageSkia& image,
 135                      const gfx::Vector2d& image_offset,
 136                      const DragEventSourceInfo& event_info) override;
 137   void UpdateDragCursor(blink::WebDragOperation operation) override;
 138   void GotFocus() override;
 139   void TakeFocus(bool reverse) override;
 140   void ShowDisambiguationPopup(
 141       const gfx::Rect& target_rect,
 142       const SkBitmap& zoomed_bitmap,
 143       const base::Callback<void(ui::GestureEvent*)>& gesture_cb,
 144       const base::Callback<void(ui::MouseEvent*)>& mouse_cb) override;
 145   void HideDisambiguationPopup() override;
 146
 147   // Overridden from OverscrollControllerDelegate:
 148   gfx::Rect GetVisibleBounds() const override;
 149   bool OnOverscrollUpdate(float delta_x, float delta_y) override;
 150   void OnOverscrollComplete(OverscrollMode overscroll_mode) override;
 151   void OnOverscrollModeChange(OverscrollMode old_mode,
 152                               OverscrollMode new_mode) override;
 153
 154   // Overridden from ui::ImplicitAnimationObserver:
 155   void OnImplicitAnimationsCompleted() override;
 156
 157   // Overridden from aura::WindowDelegate:
 158   gfx::Size GetMinimumSize() const override;
 159   gfx::Size GetMaximumSize() const override;
 160   void OnBoundsChanged(const gfx::Rect& old_bounds,
 161                        const gfx::Rect& new_bounds) override;
 162   gfx::NativeCursor GetCursor(const gfx::Point& point) override;
 163   int GetNonClientComponent(const gfx::Point& point) const override;
 164   bool ShouldDescendIntoChildForEventHandling(
 165       aura::Window* child,
 166       const gfx::Point& location) override;
 167   bool CanFocus() override;
 168   void OnCaptureLost() override;
 169   void OnPaint(gfx::Canvas* canvas) override;
 170   void OnDeviceScaleFactorChanged(float device_scale_factor) override;
 171   void OnWindowDestroying(aura::Window* window) override;
 172   void OnWindowDestroyed(aura::Window* window) override;
 173   void OnWindowTargetVisibilityChanged(bool visible) override;
 174   bool HasHitTestMask() const override;
 175   void GetHitTestMask(gfx::Path* mask) const override;
 176
 177   // Overridden from ui::EventHandler:
 178   void OnKeyEvent(ui::KeyEvent* event) override;
 179   void OnMouseEvent(ui::MouseEvent* event) override;
 180
 181   // Overridden from aura::client::DragDropDelegate:
 182   void OnDragEntered(const ui::DropTargetEvent& event) override;
 183   int OnDragUpdated(const ui::DropTargetEvent& event) override;
 184   void OnDragExited() override;
 185   int OnPerformDrop(const ui::DropTargetEvent& event) override;
 186
 187   // Overridden from aura::WindowObserver:
 188   void OnWindowVisibilityChanged(aura::Window* window, bool visible) override;
 189
 190   // Update the web contents visiblity.
 191   void UpdateWebContentsVisibility(bool visible);
 192
 193   scoped_ptr<aura::Window> window_;
 194
 195   // The window that shows the screenshot of the history page during an
 196   // overscroll navigation gesture.
 197   scoped_ptr<aura::Window> overscroll_window_;
 198
 199   scoped_ptr<WindowObserver> window_observer_;
 200
 201   // The WebContentsImpl whose contents we display.
 202   WebContentsImpl* web_contents_;
 203
 204   scoped_ptr<WebContentsViewDelegate> delegate_;
 205
 206   blink::WebDragOperationsMask current_drag_op_;
 207
 208   scoped_ptr<DropData> current_drop_data_;
 209
 210   WebDragDestDelegate* drag_dest_delegate_;
 211
 212   // We keep track of the render view host we're dragging over.  If it changes
 213   // during a drag, we need to re-send the DragEnter message.  WARNING:
 214   // this pointer should never be dereferenced.  We only use it for comparing
 215   // pointers.
 216   void* current_rvh_for_drag_;
 217
 218   bool overscroll_change_brightness_;
 219
 220   // The overscroll gesture currently in progress.
 221   OverscrollMode current_overscroll_gesture_;
 222
 223   // This is the completed overscroll gesture. This is used for the animation
 224   // callback that happens in response to a completed overscroll gesture.
 225   OverscrollMode completed_overscroll_gesture_;
 226
 227   // This manages the overlay window that shows the screenshot during a history
 228   // navigation triggered by the overscroll gesture.
 229   scoped_ptr<OverscrollNavigationOverlay> navigation_overlay_;
 230
 231   scoped_ptr<ShadowLayerDelegate> overscroll_shadow_;
 232
 233   scoped_ptr<TouchEditableImplAura> touch_editable_;
 234   scoped_ptr<GestureNavSimple> gesture_nav_simple_;
 235
 236   // On Windows we can run into problems if resources get released within the
 237   // initialization phase while the content (and its dimensions) are not known.
 238   bool is_or_was_visible_;
 239
 240   DISALLOW_COPY_AND_ASSIGN(WebContentsViewAura);
 241 };
 242
 243 }  // namespace content
 244
 245 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_AURA_H_