content/browser/renderer_host/render_widget_host_view_base.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_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
   7
   8 #if defined(OS_MACOSX)
   9 #include <OpenGL/OpenGL.h>
  10 #endif
  11
  12 #include <string>
  13 #include <vector>
  14
  15 #include "base/callback_forward.h"
  16 #include "base/memory/scoped_ptr.h"
  17 #include "base/process/kill.h"
  18 #include "base/timer/timer.h"
  19 #include "cc/output/compositor_frame.h"
  20 #include "content/browser/renderer_host/event_with_latency_info.h"
  21 #include "content/common/content_export.h"
  22 #include "content/common/input/input_event_ack_state.h"
  23 #include "content/public/browser/readback_types.h"
  24 #include "content/public/browser/render_widget_host_view.h"
  25 #include "ipc/ipc_listener.h"
  26 #include "third_party/WebKit/public/platform/WebScreenOrientationType.h"
  27 #include "third_party/WebKit/public/web/WebPopupType.h"
  28 #include "third_party/WebKit/public/web/WebTextDirection.h"
  29 #include "ui/base/ime/text_input_mode.h"
  30 #include "ui/base/ime/text_input_type.h"
  31 #include "ui/gfx/display.h"
  32 #include "ui/gfx/geometry/rect.h"
  33 #include "ui/gfx/native_widget_types.h"
  34 #include "ui/gfx/range/range.h"
  35 #include "ui/surface/transport_dib.h"
  36
  37 class SkBitmap;
  38
  39 struct AccessibilityHostMsg_EventParams;
  40 struct ViewHostMsg_SelectionBounds_Params;
  41
  42 namespace media {
  43 class VideoFrame;
  44 }
  45
  46 namespace blink {
  47 struct WebScreenInfo;
  48 }
  49
  50 namespace content {
  51 class BrowserAccessibilityDelegate;
  52 class BrowserAccessibilityManager;
  53 class SyntheticGesture;
  54 class SyntheticGestureTarget;
  55 class WebCursor;
  56 struct DidOverscrollParams;
  57 struct NativeWebKeyboardEvent;
  58 struct WebPluginGeometry;
  59
  60 // Basic implementation shared by concrete RenderWidgetHostView subclasses.
  61 class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView,
  62                                                 public IPC::Listener {
  63  public:
  64   ~RenderWidgetHostViewBase() override;
  65
  66   // RenderWidgetHostView implementation.
  67   void SetBackgroundColor(SkColor color) override;
  68   void SetBackgroundColorToDefault() final;
  69   bool GetBackgroundOpaque() override;
  70   ui::TextInputClient* GetTextInputClient() override;
  71   void WasUnOccluded() override {}
  72   void WasOccluded() override {}
  73   bool IsShowingContextMenu() const override;
  74   void SetShowingContextMenu(bool showing_menu) override;
  75   base::string16 GetSelectedText() const override;
  76   bool IsMouseLocked() override;
  77   gfx::Size GetVisibleViewportSize() const override;
  78   void SetInsets(const gfx::Insets& insets) override;
  79   void BeginFrameSubscription(
  80       scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) override;
  81   void EndFrameSubscription() override;
  82
  83   // IPC::Listener implementation:
  84   bool OnMessageReceived(const IPC::Message& msg) override;
  85
  86   // Called by the host when the input flush has completed.
  87   void OnDidFlushInput();
  88
  89   void SetPopupType(blink::WebPopupType popup_type);
  90
  91   blink::WebPopupType GetPopupType();
  92
  93   // Return a value that is incremented each time the renderer swaps a new frame
  94   // to the view.
  95   uint32 RendererFrameNumber();
  96
  97   // Called each time the RenderWidgetHost receives a new frame for display from
  98   // the renderer.
  99   void DidReceiveRendererFrame();
 100
 101   // Notification that a resize or move session ended on the native widget.
 102   void UpdateScreenInfo(gfx::NativeView view);
 103
 104   // Tells if the display property (work area/scale factor) has
 105   // changed since the last time.
 106   bool HasDisplayPropertyChanged(gfx::NativeView view);
 107
 108   base::WeakPtr<RenderWidgetHostViewBase> GetWeakPtr();
 109
 110   //----------------------------------------------------------------------------
 111   // The following methods can be overridden by derived classes.
 112
 113   // Notifies the View that the renderer text selection has changed.
 114   virtual void SelectionChanged(const base::string16& text,
 115                                 size_t offset,
 116                                 const gfx::Range& range);
 117
 118   // The requested size of the renderer. May differ from GetViewBounds().size()
 119   // when the view requires additional throttling.
 120   virtual gfx::Size GetRequestedRendererSize() const;
 121
 122   // The size of the view's backing surface in non-DPI-adjusted pixels.
 123   virtual gfx::Size GetPhysicalBackingSize() const;
 124
 125   // Whether or not Blink's viewport size should be shrunk by the height of the
 126   // URL-bar.
 127   virtual bool DoTopControlsShrinkBlinkSize() const;
 128
 129   // The height of the URL-bar top controls.
 130   virtual float GetTopControlsHeight() const;
 131
 132   // Called prior to forwarding input event messages to the renderer, giving
 133   // the view a chance to perform in-process event filtering or processing.
 134   // Return values of |NOT_CONSUMED| or |UNKNOWN| will result in |input_event|
 135   // being forwarded.
 136   virtual InputEventAckState FilterInputEvent(
 137       const blink::WebInputEvent& input_event);
 138
 139   // Called by the host when it requires an input flush; the flush call should
 140   // by synchronized with BeginFrame.
 141   virtual void OnSetNeedsFlushInput();
 142
 143   virtual void WheelEventAck(const blink::WebMouseWheelEvent& event,
 144                              InputEventAckState ack_result);
 145
 146   virtual void GestureEventAck(const blink::WebGestureEvent& event,
 147                                InputEventAckState ack_result);
 148
 149   // Create a platform specific SyntheticGestureTarget implementation that will
 150   // be used to inject synthetic input events.
 151   virtual scoped_ptr<SyntheticGestureTarget> CreateSyntheticGestureTarget();
 152
 153   // Return true if frame subscription is supported on this platform.
 154   virtual bool CanSubscribeFrame() const;
 155
 156   // Create a BrowserAccessibilityManager for this view.
 157   virtual BrowserAccessibilityManager* CreateBrowserAccessibilityManager(
 158       BrowserAccessibilityDelegate* delegate);
 159
 160   virtual void AccessibilityShowMenu(const gfx::Point& point);
 161   virtual gfx::Point AccessibilityOriginInScreen(const gfx::Rect& bounds);
 162   virtual gfx::AcceleratedWidget AccessibilityGetAcceleratedWidget();
 163   virtual gfx::NativeViewAccessible AccessibilityGetNativeViewAccessible();
 164
 165   virtual SkColorType PreferredReadbackFormat();
 166
 167   // Informs that the focused DOM node has changed.
 168   virtual void FocusedNodeChanged(bool is_editable_node) {}
 169
 170   virtual void OnSwapCompositorFrame(uint32 output_surface_id,
 171                                      scoped_ptr<cc::CompositorFrame> frame) {}
 172
 173   // Because the associated remote WebKit instance can asynchronously
 174   // prevent-default on a dispatched touch event, the touch events are queued in
 175   // the GestureRecognizer until invocation of ProcessAckedTouchEvent releases
 176   // it to be consumed (when |ack_result| is NOT_CONSUMED OR NO_CONSUMER_EXISTS)
 177   // or ignored (when |ack_result| is CONSUMED).
 178   virtual void ProcessAckedTouchEvent(const TouchEventWithLatencyInfo& touch,
 179                                       InputEventAckState ack_result) {}
 180
 181   virtual void DidOverscroll(const DidOverscrollParams& params) {}
 182
 183   virtual void DidStopFlinging() {}
 184
 185   //----------------------------------------------------------------------------
 186   // The following static methods are implemented by each platform.
 187
 188   static void GetDefaultScreenInfo(blink::WebScreenInfo* results);
 189
 190   //----------------------------------------------------------------------------
 191   // The following pure virtual methods are implemented by derived classes.
 192
 193   // Perform all the initialization steps necessary for this object to represent
 194   // a popup (such as a <select> dropdown), then shows the popup at |pos|.
 195   virtual void InitAsPopup(RenderWidgetHostView* parent_host_view,
 196                            const gfx::Rect& bounds) = 0;
 197
 198   // Perform all the initialization steps necessary for this object to represent
 199   // a full screen window.
 200   // |reference_host_view| is the view associated with the creating page that
 201   // helps to position the full screen widget on the correct monitor.
 202   virtual void InitAsFullscreen(RenderWidgetHostView* reference_host_view) = 0;
 203
 204   // Moves all plugin windows as described in the given list.
 205   // |scroll_offset| is the scroll offset of the render view.
 206   virtual void MovePluginWindows(
 207       const std::vector<WebPluginGeometry>& moves) = 0;
 208
 209   // Take focus from the associated View component.
 210   virtual void Blur() = 0;
 211
 212   // Sets the cursor to the one associated with the specified cursor_type
 213   virtual void UpdateCursor(const WebCursor& cursor) = 0;
 214
 215   // Indicates whether the page has finished loading.
 216   virtual void SetIsLoading(bool is_loading) = 0;
 217
 218   // Updates the type of the input method attached to the view.
 219   virtual void TextInputTypeChanged(ui::TextInputType type,
 220                                     ui::TextInputMode mode,
 221                                     bool can_compose_inline,
 222                                     int flags) = 0;
 223
 224   // Cancel the ongoing composition of the input method attached to the view.
 225   virtual void ImeCancelComposition() = 0;
 226
 227   // Notifies the View that the renderer has ceased to exist.
 228   virtual void RenderProcessGone(base::TerminationStatus status,
 229                                  int error_code) = 0;
 230
 231   // Notifies the View that the renderer's host has ceased to exist.
 232   // The default implementation of this is a no-op. This hack exists to fix
 233   // a crash on the branch.
 234   // TODO(ccameron): Clean this up.
 235   // http://crbug.com/404828
 236   virtual void RenderWidgetHostGone() {}
 237
 238   // Tells the View to destroy itself.
 239   virtual void Destroy() = 0;
 240
 241   // Tells the View that the tooltip text for the current mouse position over
 242   // the page has changed.
 243   virtual void SetTooltipText(const base::string16& tooltip_text) = 0;
 244
 245   // Notifies the View that the renderer selection bounds has changed.
 246   // |start_rect| and |end_rect| are the bounds end of the selection in the
 247   // coordinate system of the render view. |start_direction| and |end_direction|
 248   // indicates the direction at which the selection was made on touch devices.
 249   virtual void SelectionBoundsChanged(
 250       const ViewHostMsg_SelectionBounds_Params& params) = 0;
 251
 252   // Copies the contents of the compositing surface, providing a new SkBitmap
 253   // result via an asynchronously-run |callback|. |src_subrect| is specified in
 254   // layer space coordinates for the current platform (e.g., DIP for Aura/Mac,
 255   // physical for Android), and is the region to be copied from this view. When
 256   // |src_subrect| is empty then the whole surface will be copied. The copy is
 257   // then scaled to a SkBitmap of size |dst_size|. If |dst_size| is empty then
 258   // output will be unscaled. |callback| is run with true on success,
 259   // false otherwise. A smaller region than |src_subrect| may be copied
 260   // if the underlying surface is smaller than |src_subrect|.
 261   virtual void CopyFromCompositingSurface(const gfx::Rect& src_subrect,
 262                                           const gfx::Size& dst_size,
 263                                           ReadbackRequestCallback& callback,
 264                                           const SkColorType color_type) = 0;
 265
 266   // Copies the contents of the compositing surface, populating the given
 267   // |target| with YV12 image data. |src_subrect| is specified in layer space
 268   // coordinates for the current platform (e.g., DIP for Aura/Mac, physical for
 269   // Android), and is the region to be copied from this view. The copy is then
 270   // scaled and letterboxed with black borders to fit |target|. Finally,
 271   // |callback| is asynchronously run with true/false for
 272   // success/failure. |target| must point to an allocated, YV12 video frame of
 273   // the intended size. This operation will fail if there is no available
 274   // compositing surface.
 275   virtual void CopyFromCompositingSurfaceToVideoFrame(
 276       const gfx::Rect& src_subrect,
 277       const scoped_refptr<media::VideoFrame>& target,
 278       const base::Callback<void(bool)>& callback) = 0;
 279
 280   // Returns true if CopyFromCompositingSurfaceToVideoFrame() is likely to
 281   // succeed.
 282   //
 283   // TODO(nick): When VideoFrame copies are broadly implemented, this method
 284   // should be renamed to HasCompositingSurface(), or unified with
 285   // IsSurfaceAvailableForCopy() and HasAcceleratedSurface().
 286   virtual bool CanCopyToVideoFrame() const = 0;
 287
 288   // DEPRECATED. Called when an accelerated compositing surface is initialized.
 289   virtual void AcceleratedSurfaceInitialized(int route_id) {}
 290
 291   // Return true if the view has an accelerated surface that contains the last
 292   // presented frame for the view. If |desired_size| is non-empty, true is
 293   // returned only if the accelerated surface size matches.
 294   virtual bool HasAcceleratedSurface(const gfx::Size& desired_size) = 0;
 295
 296   // Compute the orientation type of the display assuming it is a mobile device.
 297   static blink::WebScreenOrientationType GetOrientationTypeForMobile(
 298       const gfx::Display& display);
 299
 300   // Compute the orientation type of the display assuming it is a desktop.
 301   static blink::WebScreenOrientationType GetOrientationTypeForDesktop(
 302       const gfx::Display& display);
 303
 304   virtual void GetScreenInfo(blink::WebScreenInfo* results) = 0;
 305
 306   // Gets the bounds of the window, in screen coordinates.
 307   virtual gfx::Rect GetBoundsInRootWindow() = 0;
 308
 309   virtual gfx::GLSurfaceHandle GetCompositingSurface() = 0;
 310
 311   // Called by the RenderFrameHost when it receives an IPC response to a
 312   // TextSurroundingSelectionRequest.
 313   virtual void OnTextSurroundingSelectionResponse(const base::string16& content,
 314                                                   size_t start_offset,
 315                                                   size_t end_offset);
 316
 317   // Called by the RenderWidgetHost when an ambiguous gesture is detected to
 318   // show the disambiguation popup bubble.
 319   virtual void ShowDisambiguationPopup(const gfx::Rect& rect_pixels,
 320                                        const SkBitmap& zoomed_bitmap);
 321
 322   // Called by the WebContentsImpl when a user tries to navigate a new page on
 323   // main frame.
 324   virtual void OnDidNavigateMainFrameToNewPage();
 325
 326 #if defined(OS_ANDROID)
 327   // Instructs the view to not drop the surface even when the view is hidden.
 328   virtual void LockCompositingSurface() = 0;
 329   virtual void UnlockCompositingSurface() = 0;
 330 #endif
 331
 332 #if defined(OS_MACOSX)
 333   // Does any event handling necessary for plugin IME; should be called after
 334   // the plugin has already had a chance to process the event. If plugin IME is
 335   // not enabled, this is a no-op, so it is always safe to call.
 336   // Returns true if the event was handled by IME.
 337   virtual bool PostProcessEventForPluginIme(
 338       const NativeWebKeyboardEvent& event) = 0;
 339 #endif
 340
 341   // Updates the range of the marked text in an IME composition.
 342   virtual void ImeCompositionRangeChanged(
 343       const gfx::Range& range,
 344       const std::vector<gfx::Rect>& character_bounds) = 0;
 345
 346 #if defined(OS_WIN)
 347   virtual void SetParentNativeViewAccessible(
 348       gfx::NativeViewAccessible accessible_parent) = 0;
 349
 350   // Returns an HWND that's given as the parent window for windowless Flash to
 351   // workaround crbug.com/301548.
 352   virtual gfx::NativeViewId GetParentForWindowlessPlugin() const = 0;
 353
 354   // The callback that DetachPluginsHelper calls for each child window. Call
 355   // this directly if you want to do custom filtering on plugin windows first.
 356   static void DetachPluginWindowsCallback(HWND window);
 357 #endif
 358
 359  protected:
 360   // Interface class only, do not construct.
 361   RenderWidgetHostViewBase();
 362
 363 #if defined(OS_WIN)
 364   // Shared implementation of MovePluginWindows for use by win and aura/wina.
 365   static void MovePluginWindowsHelper(
 366       HWND parent,
 367       const std::vector<WebPluginGeometry>& moves);
 368
 369   static void PaintPluginWindowsHelper(
 370       HWND parent,
 371       const gfx::Rect& damaged_screen_rect);
 372
 373   // Needs to be called before the HWND backing the view goes away to avoid
 374   // crashes in Windowed plugins.
 375   static void DetachPluginsHelper(HWND parent);
 376 #endif
 377
 378   // Whether this view is a popup and what kind of popup it is (select,
 379   // autofill...).
 380   blink::WebPopupType popup_type_;
 381
 382   // The background color of the web content.
 383   SkColor background_color_;
 384
 385   // While the mouse is locked, the cursor is hidden from the user. Mouse events
 386   // are still generated. However, the position they report is the last known
 387   // mouse position just as mouse lock was entered; the movement they report
 388   // indicates what the change in position of the mouse would be had it not been
 389   // locked.
 390   bool mouse_locked_;
 391
 392   // Whether we are showing a context menu.
 393   bool showing_context_menu_;
 394
 395   // A buffer containing the text inside and around the current selection range.
 396   base::string16 selection_text_;
 397
 398   // The offset of the text stored in |selection_text_| relative to the start of
 399   // the web page.
 400   size_t selection_text_offset_;
 401
 402   // The current selection range relative to the start of the web page.
 403   gfx::Range selection_range_;
 404
 405 protected:
 406   // The scale factor of the display the renderer is currently on.
 407   float current_device_scale_factor_;
 408
 409   // The orientation of the display the renderer is currently on.
 410   gfx::Display::Rotation current_display_rotation_;
 411
 412   // Whether pinch-to-zoom should be enabled and pinch events forwarded to the
 413   // renderer.
 414   bool pinch_zoom_enabled_;
 415
 416  private:
 417   void FlushInput();
 418
 419   gfx::Rect current_display_area_;
 420
 421   uint32 renderer_frame_number_;
 422
 423   base::OneShotTimer<RenderWidgetHostViewBase> flush_input_timer_;
 424
 425   base::WeakPtrFactory<RenderWidgetHostViewBase> weak_factory_;
 426
 427   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewBase);
 428 };
 429
 430 }  // namespace content
 431
 432 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_