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
21namespace aura {
22class Window;
23}
24
25namespace ui {
26class DropTargetEvent;
27}
28
29namespace content {
30class GestureNavSimple;
31class OverscrollNavigationOverlay;
32class RenderWidgetHostImpl;
33class RenderWidgetHostViewAura;
34class ShadowLayerDelegate;
35class TouchEditableImplAura;
36class WebContentsViewDelegate;
37class WebContentsImpl;
38class WebDragDestDelegate;
39
40class 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  virtual ~WebContentsViewAura();
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::Vector2d GetTranslationForOverscroll(int delta_x, int 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(int delta_y);
104
105  // Overridden from WebContentsView:
106  virtual gfx::NativeView GetNativeView() const OVERRIDE;
107  virtual gfx::NativeView GetContentNativeView() const OVERRIDE;
108  virtual gfx::NativeWindow GetTopLevelNativeWindow() const OVERRIDE;
109  virtual void GetContainerBounds(gfx::Rect *out) const OVERRIDE;
110  virtual void SizeContents(const gfx::Size& size) OVERRIDE;
111  virtual void Focus() OVERRIDE;
112  virtual void SetInitialFocus() OVERRIDE;
113  virtual void StoreFocus() OVERRIDE;
114  virtual void RestoreFocus() OVERRIDE;
115  virtual DropData* GetDropData() const OVERRIDE;
116  virtual gfx::Rect GetViewBounds() const OVERRIDE;
117  virtual void CreateView(
118      const gfx::Size& initial_size, gfx::NativeView context) OVERRIDE;
119  virtual RenderWidgetHostViewBase* CreateViewForWidget(
120      RenderWidgetHost* render_widget_host) OVERRIDE;
121  virtual RenderWidgetHostViewBase* CreateViewForPopupWidget(
122      RenderWidgetHost* render_widget_host) OVERRIDE;
123  virtual void SetPageTitle(const base::string16& title) OVERRIDE;
124  virtual void RenderViewCreated(RenderViewHost* host) OVERRIDE;
125  virtual void RenderViewSwappedIn(RenderViewHost* host) OVERRIDE;
126  virtual void SetOverscrollControllerEnabled(bool enabled) OVERRIDE;
127
128  // Overridden from RenderViewHostDelegateView:
129  virtual void ShowContextMenu(RenderFrameHost* render_frame_host,
130                               const ContextMenuParams& params) OVERRIDE;
131  virtual void StartDragging(const DropData& drop_data,
132                             blink::WebDragOperationsMask operations,
133                             const gfx::ImageSkia& image,
134                             const gfx::Vector2d& image_offset,
135                             const DragEventSourceInfo& event_info) OVERRIDE;
136  virtual void UpdateDragCursor(blink::WebDragOperation operation) OVERRIDE;
137  virtual void GotFocus() OVERRIDE;
138  virtual void TakeFocus(bool reverse) OVERRIDE;
139  virtual void ShowDisambiguationPopup(
140      const gfx::Rect& target_rect,
141      const SkBitmap& zoomed_bitmap,
142      const base::Callback<void(ui::GestureEvent*)>& gesture_cb,
143      const base::Callback<void(ui::MouseEvent*)>& mouse_cb) OVERRIDE;
144  virtual void HideDisambiguationPopup() OVERRIDE;
145
146  // Overridden from OverscrollControllerDelegate:
147  virtual gfx::Rect GetVisibleBounds() const OVERRIDE;
148  virtual bool OnOverscrollUpdate(float delta_x, float delta_y) OVERRIDE;
149  virtual void OnOverscrollComplete(OverscrollMode overscroll_mode) OVERRIDE;
150  virtual void OnOverscrollModeChange(OverscrollMode old_mode,
151                                      OverscrollMode new_mode) OVERRIDE;
152
153  // Overridden from ui::ImplicitAnimationObserver:
154  virtual void OnImplicitAnimationsCompleted() OVERRIDE;
155
156  // Overridden from aura::WindowDelegate:
157  virtual gfx::Size GetMinimumSize() const OVERRIDE;
158  virtual gfx::Size GetMaximumSize() const OVERRIDE;
159  virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
160                               const gfx::Rect& new_bounds) OVERRIDE;
161  virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE;
162  virtual int GetNonClientComponent(const gfx::Point& point) const OVERRIDE;
163  virtual bool ShouldDescendIntoChildForEventHandling(
164      aura::Window* child,
165      const gfx::Point& location) OVERRIDE;
166  virtual bool CanFocus() OVERRIDE;
167  virtual void OnCaptureLost() OVERRIDE;
168  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
169  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
170  virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
171  virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
172  virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE;
173  virtual bool HasHitTestMask() const OVERRIDE;
174  virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE;
175
176  // Overridden from ui::EventHandler:
177  virtual void OnKeyEvent(ui::KeyEvent* event) OVERRIDE;
178  virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
179
180  // Overridden from aura::client::DragDropDelegate:
181  virtual void OnDragEntered(const ui::DropTargetEvent& event) OVERRIDE;
182  virtual int OnDragUpdated(const ui::DropTargetEvent& event) OVERRIDE;
183  virtual void OnDragExited() OVERRIDE;
184  virtual int OnPerformDrop(const ui::DropTargetEvent& event) OVERRIDE;
185
186  // Overridden from aura::WindowObserver:
187  virtual void OnWindowVisibilityChanged(aura::Window* window,
188                                         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_
246