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.
5 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
6 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
16 #include "base/callback.h"
17 #include "base/gtest_prod_util.h"
18 #include "base/memory/scoped_ptr.h"
19 #include "base/memory/weak_ptr.h"
20 #include "base/observer_list.h"
21 #include "base/process/kill.h"
22 #include "base/strings/string16.h"
23 #include "base/time/time.h"
24 #include "base/timer/timer.h"
25 #include "build/build_config.h"
26 #include "content/browser/renderer_host/input/input_ack_handler.h"
27 #include "content/browser/renderer_host/input/input_router_client.h"
28 #include "content/common/browser_rendering_stats.h"
29 #include "content/common/input/synthetic_gesture_packet.h"
30 #include "content/common/view_message_enums.h"
31 #include "content/port/browser/event_with_latency_info.h"
32 #include "content/port/common/input_event_ack_state.h"
33 #include "content/public/browser/render_widget_host.h"
34 #include "content/public/common/page_zoom.h"
35 #include "ipc/ipc_listener.h"
36 #include "ui/base/ime/text_input_mode.h"
37 #include "ui/base/ime/text_input_type.h"
38 #include "ui/events/latency_info.h"
39 #include "ui/gfx/native_widget_types.h"
42 struct AcceleratedSurfaceMsg_BufferPresented_Params;
43 struct ViewHostMsg_CompositorSurfaceBuffersSwapped_Params;
44 struct ViewHostMsg_UpdateRect_Params;
45 struct ViewHostMsg_TextInputState_Params;
46 struct ViewHostMsg_BeginSmoothScroll_Params;
53 class CompositorFrame;
54 class CompositorFrameAck;
68 struct WebCompositionUnderline;
72 #if defined(OS_ANDROID)
81 class MockRenderWidgetHost;
82 class OverscrollController;
83 class RenderWidgetHostDelegate;
84 class RenderWidgetHostViewPort;
85 class SyntheticGestureController;
89 // This implements the RenderWidgetHost interface that is exposed to
90 // embedders of content, and adds things only visible to content.
91 class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
92 public InputRouterClient,
93 public InputAckHandler,
94 public IPC::Listener {
96 // routing_id can be MSG_ROUTING_NONE, in which case the next available
97 // routing id is taken from the RenderProcessHost.
98 // If this object outlives |delegate|, DetachDelegate() must be called when
99 // |delegate| goes away.
100 RenderWidgetHostImpl(RenderWidgetHostDelegate* delegate,
101 RenderProcessHost* process,
104 virtual ~RenderWidgetHostImpl();
106 // Similar to RenderWidgetHost::FromID, but returning the Impl object.
107 static RenderWidgetHostImpl* FromID(int32 process_id, int32 routing_id);
109 // Returns all RenderWidgetHosts including swapped out ones for
110 // internal use. The public interface
111 // RendgerWidgetHost::GetRenderWidgetHosts only returns active ones.
112 static scoped_ptr<RenderWidgetHostIterator> GetAllRenderWidgetHosts();
114 // Use RenderWidgetHostImpl::From(rwh) to downcast a
115 // RenderWidgetHost to a RenderWidgetHostImpl. Internally, this
116 // uses RenderWidgetHost::AsRenderWidgetHostImpl().
117 static RenderWidgetHostImpl* From(RenderWidgetHost* rwh);
119 void set_hung_renderer_delay_ms(const base::TimeDelta& timeout) {
120 hung_renderer_delay_ms_ = timeout.InMilliseconds();
123 // RenderWidgetHost implementation.
124 virtual void Undo() OVERRIDE;
125 virtual void Redo() OVERRIDE;
126 virtual void Cut() OVERRIDE;
127 virtual void Copy() OVERRIDE;
128 virtual void CopyToFindPboard() OVERRIDE;
129 virtual void Paste() OVERRIDE;
130 virtual void PasteAndMatchStyle() OVERRIDE;
131 virtual void Delete() OVERRIDE;
132 virtual void SelectAll() OVERRIDE;
133 virtual void Unselect() OVERRIDE;
134 virtual void UpdateTextDirection(blink::WebTextDirection direction) OVERRIDE;
135 virtual void NotifyTextDirection() OVERRIDE;
136 virtual void Focus() OVERRIDE;
137 virtual void Blur() OVERRIDE;
138 virtual void SetActive(bool active) OVERRIDE;
139 virtual void CopyFromBackingStore(
140 const gfx::Rect& src_rect,
141 const gfx::Size& accelerated_dst_size,
142 const base::Callback<void(bool, const SkBitmap&)>& callback) OVERRIDE;
143 #if defined(TOOLKIT_GTK)
144 virtual bool CopyFromBackingStoreToGtkWindow(const gfx::Rect& dest_rect,
145 GdkWindow* target) OVERRIDE;
146 #elif defined(OS_MACOSX)
147 virtual gfx::Size GetBackingStoreSize() OVERRIDE;
148 virtual bool CopyFromBackingStoreToCGContext(const CGRect& dest_rect,
149 CGContextRef target) OVERRIDE;
151 virtual void EnableFullAccessibilityMode() OVERRIDE;
152 virtual void ForwardMouseEvent(
153 const blink::WebMouseEvent& mouse_event) OVERRIDE;
154 virtual void ForwardWheelEvent(
155 const blink::WebMouseWheelEvent& wheel_event) OVERRIDE;
156 virtual void ForwardKeyboardEvent(
157 const NativeWebKeyboardEvent& key_event) OVERRIDE;
158 virtual const gfx::Vector2d& GetLastScrollOffset() const OVERRIDE;
159 virtual RenderProcessHost* GetProcess() const OVERRIDE;
160 virtual int GetRoutingID() const OVERRIDE;
161 virtual RenderWidgetHostView* GetView() const OVERRIDE;
162 virtual bool IsLoading() const OVERRIDE;
163 virtual bool IsRenderView() const OVERRIDE;
164 virtual void PaintAtSize(TransportDIB::Handle dib_handle,
166 const gfx::Size& page_size,
167 const gfx::Size& desired_size) OVERRIDE;
168 virtual void Replace(const base::string16& word) OVERRIDE;
169 virtual void ReplaceMisspelling(const base::string16& word) OVERRIDE;
170 virtual void ResizeRectChanged(const gfx::Rect& new_rect) OVERRIDE;
171 virtual void RestartHangMonitorTimeout() OVERRIDE;
172 virtual void SetIgnoreInputEvents(bool ignore_input_events) OVERRIDE;
173 virtual void Stop() OVERRIDE;
174 virtual void WasResized() OVERRIDE;
175 virtual void AddKeyPressEventCallback(
176 const KeyPressEventCallback& callback) OVERRIDE;
177 virtual void RemoveKeyPressEventCallback(
178 const KeyPressEventCallback& callback) OVERRIDE;
179 virtual void AddMouseEventCallback(
180 const MouseEventCallback& callback) OVERRIDE;
181 virtual void RemoveMouseEventCallback(
182 const MouseEventCallback& callback) OVERRIDE;
183 virtual void GetWebScreenInfo(blink::WebScreenInfo* result) OVERRIDE;
184 virtual void GetSnapshotFromRenderer(
185 const gfx::Rect& src_subrect,
186 const base::Callback<void(bool, const SkBitmap&)>& callback) OVERRIDE;
188 const NativeWebKeyboardEvent* GetLastKeyboardEvent() const;
190 // Notification that the screen info has changed.
191 void NotifyScreenInfoChanged();
193 // Invalidates the cached screen info so that next resize request
194 // will carry the up to date screen info. Unlike
195 // |NotifyScreenInfoChanged|, this doesn't send a message to the renderer.
196 void InvalidateScreenInfo();
198 // Sets the View of this RenderWidgetHost.
199 void SetView(RenderWidgetHostView* view);
201 int surface_id() const { return surface_id_; }
203 bool empty() const { return current_size_.IsEmpty(); }
205 // Called when a renderer object already been created for this host, and we
206 // just need to be attached to it. Used for window.open, <select> dropdown
207 // menus, and other times when the renderer initiates creating an object.
210 // Tells the renderer to die and then calls Destroy().
211 virtual void Shutdown();
214 virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
216 // Sends a message to the corresponding object in the renderer.
217 virtual bool Send(IPC::Message* msg) OVERRIDE;
219 // Called to notify the RenderWidget that it has been hidden or restored from
220 // having been hidden.
224 // Returns true if the RenderWidget is hidden.
225 bool is_hidden() const { return is_hidden_; }
227 // Called to notify the RenderWidget that its associated native window
229 virtual void GotFocus();
230 virtual void LostCapture();
232 // Called to notify the RenderWidget that it has lost the mouse lock.
233 virtual void LostMouseLock();
235 // Noifies the RenderWidget of the current mouse cursor visibility state.
236 void SendCursorVisibilityState(bool is_visible);
238 // Tells us whether the page is rendered directly via the GPU process.
239 bool is_accelerated_compositing_active() {
240 return is_accelerated_compositing_active_;
243 // Notifies the RenderWidgetHost that the View was destroyed.
244 void ViewDestroyed();
246 // Indicates if the page has finished loading.
247 void SetIsLoading(bool is_loading);
249 // Check for the existance of a BackingStore of the given |desired_size| and
250 // return it if it exists. If the BackingStore is GPU, true is returned and
251 // |*backing_store| is set to NULL.
252 bool TryGetBackingStore(const gfx::Size& desired_size,
253 BackingStore** backing_store);
255 // Get access to the widget's backing store matching the size of the widget's
256 // view. If you pass |force_create| as true, then GetBackingStore may block
257 // for the renderer to send a new frame. Otherwise, NULL will be returned if
258 // the backing store doesn't already exist. It will also return NULL if the
259 // backing store could not be created.
261 // Mac only: NULL may also be returned if the last frame was GPU accelerated.
262 // Call GetView()->HasAcceleratedSurface to determine if the last frame was
264 BackingStore* GetBackingStore(bool force_create);
266 // Allocate a new backing store of the given size. Returns NULL on failure
267 // (for example, if we don't currently have a RenderWidgetHostView.)
268 BackingStore* AllocBackingStore(const gfx::Size& size);
270 // When a backing store does asynchronous painting, it will call this function
271 // when it is done with the DIB. We will then forward a message to the
272 // renderer to send another paint.
273 void DonePaintingToBackingStore();
275 // GPU accelerated version of GetBackingStore function. This will
276 // trigger a re-composite to the view. It may fail if a resize is pending, or
277 // if a composite has already been requested and not acked yet.
278 bool ScheduleComposite();
280 // Starts a hang monitor timeout. If there's already a hang monitor timeout
281 // the new one will only fire if it has a shorter delay than the time
282 // left on the existing timeouts.
283 void StartHangMonitorTimeout(base::TimeDelta delay);
285 // Stops all existing hang monitor timeouts and assumes the renderer is
287 void StopHangMonitorTimeout();
289 // Forwards the given message to the renderer. These are called by the view
290 // when it has received a message.
291 void ForwardGestureEvent(const blink::WebGestureEvent& gesture_event);
292 void ForwardGestureEventWithLatencyInfo(
293 const blink::WebGestureEvent& gesture_event,
294 const ui::LatencyInfo& ui_latency);
295 void ForwardTouchEventWithLatencyInfo(
296 const blink::WebTouchEvent& touch_event,
297 const ui::LatencyInfo& ui_latency);
298 void ForwardMouseEventWithLatencyInfo(
299 const blink::WebMouseEvent& mouse_event,
300 const ui::LatencyInfo& ui_latency);
301 void ForwardWheelEventWithLatencyInfo(
302 const blink::WebMouseWheelEvent& wheel_event,
303 const ui::LatencyInfo& ui_latency);
305 void CancelUpdateTextDirection();
307 // Called when a mouse click/gesture tap activates the renderer.
308 virtual void OnPointerEventActivate();
310 // Notifies the renderer whether or not the input method attached to this
311 // process is activated.
312 // When the input method is activated, a renderer process sends IPC messages
313 // to notify the status of its composition node. (This message is mainly used
314 // for notifying the position of the input cursor so that the browser can
315 // display input method windows under the cursor.)
316 void SetInputMethodActive(bool activate);
318 // Notifies the renderer changes of IME candidate window state.
319 void CandidateWindowShown();
320 void CandidateWindowUpdated();
321 void CandidateWindowHidden();
323 // Update the composition node of the renderer (or WebKit).
324 // WebKit has a special node (a composition node) for input method to change
325 // its text without affecting any other DOM nodes. When the input method
326 // (attached to the browser) updates its text, the browser sends IPC messages
327 // to update the composition node of the renderer.
328 // (Read the comments of each function for its detail.)
330 // Sets the text of the composition node.
331 // This function can also update the cursor position and mark the specified
332 // range in the composition node.
333 // A browser should call this function:
334 // * when it receives a WM_IME_COMPOSITION message with a GCS_COMPSTR flag
336 // * when it receives a "preedit_changed" signal of GtkIMContext (on Linux);
337 // * when markedText of NSTextInput is called (on Mac).
338 void ImeSetComposition(
339 const base::string16& text,
340 const std::vector<blink::WebCompositionUnderline>& underlines,
344 // Finishes an ongoing composition with the specified text.
345 // A browser should call this function:
346 // * when it receives a WM_IME_COMPOSITION message with a GCS_RESULTSTR flag
348 // * when it receives a "commit" signal of GtkIMContext (on Linux);
349 // * when insertText of NSTextInput is called (on Mac).
350 void ImeConfirmComposition(const base::string16& text,
351 const gfx::Range& replacement_range,
352 bool keep_selection);
354 // Cancels an ongoing composition.
355 void ImeCancelComposition();
357 // Deletes the current selection plus the specified number of characters
358 // before and after the selection or caret.
359 void ExtendSelectionAndDelete(size_t before, size_t after);
361 // This is for derived classes to give us access to the resizer rect.
362 // And to also expose it to the RenderWidgetHostView.
363 virtual gfx::Rect GetRootWindowResizerRect() const;
365 bool ignore_input_events() const {
366 return ignore_input_events_;
369 bool input_method_active() const {
370 return input_method_active_;
373 // Whether forwarded WebInputEvents should be ignored. True if either
374 // |ignore_input_events_| or |process_->IgnoreInputEvents()| is true.
375 bool IgnoreInputEvents() const;
377 // Event queries delegated to the |input_router_|.
378 bool ShouldForwardTouchEvent() const;
380 bool has_touch_handler() const { return has_touch_handler_; }
382 // Notification that the user has made some kind of input that could
383 // perform an action. See OnUserGesture for more details.
384 void StartUserGesture();
386 // Set the RenderView background.
387 void SetBackground(const SkBitmap& background);
389 // Notifies the renderer that the next key event is bound to one or more
390 // pre-defined edit commands
391 void SetEditCommandsForNextKeyEvent(
392 const std::vector<EditCommand>& commands);
394 // Gets the accessibility mode.
395 AccessibilityMode accessibility_mode() const {
396 return accessibility_mode_;
399 // Send a message to the renderer process to change the accessibility mode.
400 void SetAccessibilityMode(AccessibilityMode mode);
402 // Relay a request from assistive technology to perform the default action
404 void AccessibilityDoDefaultAction(int object_id);
406 // Relay a request from assistive technology to set focus to a given node.
407 void AccessibilitySetFocus(int object_id);
409 // Relay a request from assistive technology to make a given object
410 // visible by scrolling as many scrollable containers as necessary.
411 // In addition, if it's not possible to make the entire object visible,
412 // scroll so that the |subfocus| rect is visible at least. The subfocus
413 // rect is in local coordinates of the object itself.
414 void AccessibilityScrollToMakeVisible(
415 int acc_obj_id, gfx::Rect subfocus);
417 // Relay a request from assistive technology to move a given object
418 // to a specific location, in the WebContents area coordinate space, i.e.
419 // (0, 0) is the top-left corner of the WebContents.
420 void AccessibilityScrollToPoint(int acc_obj_id, gfx::Point point);
422 // Relay a request from assistive technology to set text selection.
423 void AccessibilitySetTextSelection(
424 int acc_obj_id, int start_offset, int end_offset);
426 // Kill the renderer because we got a fatal accessibility error.
427 void FatalAccessibilityTreeError();
430 void SetParentNativeViewAccessible(
431 gfx::NativeViewAccessible accessible_parent);
432 gfx::NativeViewAccessible GetParentNativeViewAccessible() const;
435 // Executes the edit command on the RenderView.
436 void ExecuteEditCommand(const std::string& command,
437 const std::string& value);
439 // Tells the renderer to scroll the currently focused node into rect only if
440 // the currently focused node is a Text node (textfield, text area or content
442 void ScrollFocusedEditableNodeIntoRect(const gfx::Rect& rect);
444 // Requests the renderer to select the region between two points.
445 void SelectRange(const gfx::Point& start, const gfx::Point& end);
447 // Requests the renderer to move the caret selection towards the point.
448 void MoveCaret(const gfx::Point& point);
450 // Called when the reponse to a pending mouse lock request has arrived.
451 // Returns true if |allowed| is true and the mouse has been successfully
453 bool GotResponseToLockMouseRequest(bool allowed);
455 // Tells the RenderWidget about the latest vsync parameters.
456 // Note: Make sure the timebase was obtained using
457 // base::TimeTicks::HighResNow. Using the non-high res timer will result in
458 // incorrect synchronization across processes.
459 virtual void UpdateVSyncParameters(base::TimeTicks timebase,
460 base::TimeDelta interval);
462 // Called by the view in response to AcceleratedSurfaceBuffersSwapped or
463 // AcceleratedSurfacePostSubBuffer.
464 static void AcknowledgeBufferPresent(
467 const AcceleratedSurfaceMsg_BufferPresented_Params& params);
469 // Called by the view in response to OnSwapCompositorFrame.
470 static void SendSwapCompositorFrameAck(
472 uint32 output_surface_id,
473 int renderer_host_id,
474 const cc::CompositorFrameAck& ack);
476 // Called by the view to return resources to the compositor.
477 static void SendReclaimCompositorResources(int32 route_id,
478 uint32 output_surface_id,
479 int renderer_host_id,
480 const cc::CompositorFrameAck& ack);
482 // Called by the view in response to AcceleratedSurfaceBuffersSwapped for
483 // platforms that support deferred GPU process descheduling. This does
484 // nothing if the compositor thread is enabled.
485 // TODO(jbates) Once the compositor thread is always on, this can be removed.
486 void AcknowledgeSwapBuffersToRenderer();
488 bool is_threaded_compositing_enabled() const {
489 return is_threaded_compositing_enabled_;
492 #if defined(USE_AURA)
493 // Called by the view when the parent changes. If a parent isn't available,
495 void ParentChanged(gfx::NativeViewId new_parent);
498 void set_allow_privileged_mouse_lock(bool allow) {
499 allow_privileged_mouse_lock_ = allow;
502 // Resets state variables related to tracking pending size and painting.
504 // We need to reset these flags when we want to repaint the contents of
505 // browser plugin in this RWH. Resetting these flags will ensure we ignore
506 // any previous pending acks that are not relevant upon repaint.
507 void ResetSizeAndRepaintPendingFlags();
509 void DetachDelegate();
511 // Update the renderer's cache of the screen rect of the view and window.
512 void SendScreenRects();
514 OverscrollController* overscroll_controller() const {
515 return overscroll_controller_.get();
518 // Sets whether the overscroll controller should be enabled for this page.
519 void SetOverscrollControllerEnabled(bool enabled);
521 // Suppreses future char events until a keydown. See
522 // suppress_next_char_events_.
523 void SuppressNextCharEvents();
525 // Called by RenderWidgetHostView in response to OnSetNeedsFlushInput.
529 virtual void SetNeedsFlush() OVERRIDE;
531 // Indicates whether the renderer drives the RenderWidgetHosts's size or the
533 bool should_auto_resize() { return should_auto_resize_; }
535 void ComputeTouchLatency(const ui::LatencyInfo& latency_info);
536 void FrameSwapped(const ui::LatencyInfo& latency_info);
537 void DidReceiveRendererFrame();
539 // Returns the ID that uniquely describes this component to the latency
541 int64 GetLatencyComponentId();
543 static void CompositorFrameDrawn(
544 const std::vector<ui::LatencyInfo>& latency_info);
546 // Don't check whether we expected a resize ack during layout tests.
547 static void DisableResizeAckCheckForTesting();
549 void WindowSnapshotAsyncCallback(
552 gfx::Size snapshot_size,
553 scoped_refptr<base::RefCountedBytes> png_data);
555 // LatencyComponents generated in the renderer must have component IDs
556 // provided to them by the browser process. This function adds the correct
557 // component ID where necessary.
558 void AddLatencyInfoComponentIds(ui::LatencyInfo* latency_info);
561 virtual RenderWidgetHostImpl* AsRenderWidgetHostImpl() OVERRIDE;
563 // Create a LatencyInfo struct with INPUT_EVENT_LATENCY_RWH_COMPONENT
564 // component if it is not already in |original|. And if |original| is
565 // not NULL, it is also merged into the resulting LatencyInfo.
566 ui::LatencyInfo CreateRWHLatencyInfoIfNotExist(
567 const ui::LatencyInfo* original, blink::WebInputEvent::Type type);
569 // Called when we receive a notification indicating that the renderer
570 // process has gone. This will reset our state so that our state will be
571 // consistent if a new renderer is created.
572 void RendererExited(base::TerminationStatus status, int exit_code);
574 // Retrieves an id the renderer can use to refer to its view.
575 // This is used for various IPC messages, including plugins.
576 gfx::NativeViewId GetNativeViewId() const;
578 // Retrieves an id for the surface that the renderer can draw to
579 // when accelerated compositing is enabled.
580 gfx::GLSurfaceHandle GetCompositingSurface();
582 // ---------------------------------------------------------------------------
583 // The following methods are overridden by RenderViewHost to send upwards to
586 // Called when a mousewheel event was not processed by the renderer.
587 virtual void UnhandledWheelEvent(const blink::WebMouseWheelEvent& event) {}
589 // Notification that the user has made some kind of input that could
590 // perform an action. The gestures that count are 1) any mouse down
591 // event and 2) enter or space key presses.
592 virtual void OnUserGesture() {}
594 // Callbacks for notification when the renderer becomes unresponsive to user
595 // input events, and subsequently responsive again.
596 virtual void NotifyRendererUnresponsive() {}
597 virtual void NotifyRendererResponsive() {}
599 // Called when auto-resize resulted in the renderer size changing.
600 virtual void OnRenderAutoResized(const gfx::Size& new_size) {}
602 // ---------------------------------------------------------------------------
604 // RenderViewHost overrides this method to impose further restrictions on when
605 // to allow mouse lock.
606 // Once the request is approved or rejected, GotResponseToLockMouseRequest()
608 virtual void RequestToLockMouse(bool user_gesture,
609 bool last_unlocked_by_target);
611 void RejectMouseLockOrUnlockIfNecessary();
612 bool IsMouseLocked() const;
614 // RenderViewHost overrides this method to report when in fullscreen mode.
615 virtual bool IsFullscreen() const;
617 // Indicates if the render widget host should track the render widget's size
618 // as opposed to visa versa.
619 void SetShouldAutoResize(bool enable);
621 // Expose increment/decrement of the in-flight event count, so
622 // RenderViewHostImpl can account for in-flight beforeunload/unload events.
623 int increment_in_flight_event_count() { return ++in_flight_event_count_; }
624 int decrement_in_flight_event_count() { return --in_flight_event_count_; }
626 // Returns whether an overscroll gesture is in progress.
627 bool IsInOverscrollGesture() const;
629 // The View associated with the RenderViewHost. The lifetime of this object
630 // is associated with the lifetime of the Render process. If the Renderer
631 // crashes, its View is destroyed and this pointer becomes NULL, even though
632 // render_view_host_ lives on to load another URL (creating a new View while
634 RenderWidgetHostViewPort* view_;
636 // true if a renderer has once been valid. We use this flag to display a sad
637 // tab only when we lose our renderer and not if a paint occurs during
639 bool renderer_initialized_;
641 // This value indicates how long to wait before we consider a renderer hung.
642 int hung_renderer_delay_ms_;
645 friend class MockRenderWidgetHost;
647 // Tell this object to destroy itself.
650 // Called by |hang_timeout_monitor_| on delayed response from the renderer.
651 void RendererIsUnresponsive();
653 // Called if we know the renderer is responsive. When we currently think the
654 // renderer is unresponsive, this will clear that state and call
655 // NotifyRendererResponsive.
656 void RendererIsResponsive();
658 // IPC message handlers
659 void OnRenderViewReady();
660 void OnRenderProcessGone(int status, int error_code);
662 void OnUpdateScreenRectsAck();
663 void OnRequestMove(const gfx::Rect& pos);
664 void OnSetTooltipText(const base::string16& tooltip_text,
665 blink::WebTextDirection text_direction_hint);
666 void OnPaintAtSizeAck(int tag, const gfx::Size& size);
667 #if defined(OS_MACOSX)
668 void OnCompositorSurfaceBuffersSwapped(
669 const ViewHostMsg_CompositorSurfaceBuffersSwapped_Params& params);
671 bool OnSwapCompositorFrame(const IPC::Message& message);
672 void OnOverscrolled(gfx::Vector2dF accumulated_overscroll,
673 gfx::Vector2dF current_fling_velocity);
674 void OnFlingingStopped();
675 void OnUpdateRect(const ViewHostMsg_UpdateRect_Params& params);
676 void OnUpdateIsDelayed();
677 void OnQueueSyntheticGesture(const SyntheticGesturePacket& gesture_packet);
678 virtual void OnFocus();
679 virtual void OnBlur();
680 void OnSetCursor(const WebCursor& cursor);
681 void OnTextInputTypeChanged(ui::TextInputType type,
682 ui::TextInputMode input_mode,
683 bool can_compose_inline);
684 #if defined(OS_MACOSX) || defined(OS_WIN) || defined(USE_AURA)
685 void OnImeCompositionRangeChanged(
686 const gfx::Range& range,
687 const std::vector<gfx::Rect>& character_bounds);
689 void OnImeCancelComposition();
690 void OnDidActivateAcceleratedCompositing(bool activated);
691 void OnLockMouse(bool user_gesture,
692 bool last_unlocked_by_target,
694 void OnUnlockMouse();
695 void OnShowDisambiguationPopup(const gfx::Rect& rect,
696 const gfx::Size& size,
697 const TransportDIB::Id& id);
699 void OnWindowlessPluginDummyWindowCreated(
700 gfx::NativeViewId dummy_activation_window);
701 void OnWindowlessPluginDummyWindowDestroyed(
702 gfx::NativeViewId dummy_activation_window);
704 void OnSnapshot(bool success, const SkBitmap& bitmap);
706 // Called (either immediately or asynchronously) after we're done with our
707 // BackingStore and can send an ACK to the renderer so it can paint onto it
709 void DidUpdateBackingStore(const ViewHostMsg_UpdateRect_Params& params,
710 const base::TimeTicks& paint_start);
712 // Paints the given bitmap to the current backing store at the given
713 // location. Returns true if the passed callback was asynchronously
714 // scheduled in the future (and thus the caller must manually synchronously
715 // call the callback function).
716 bool PaintBackingStoreRect(TransportDIB::Id bitmap,
717 const gfx::Rect& bitmap_rect,
718 const std::vector<gfx::Rect>& copy_rects,
719 const gfx::Size& view_size,
721 const base::Closure& completion_callback);
723 // Scrolls the given |clip_rect| in the backing by the given dx/dy amount. The
724 // |dib| and its corresponding location |bitmap_rect| in the backing store
725 // is the newly painted pixels by the renderer.
726 void ScrollBackingStoreRect(const gfx::Vector2d& delta,
727 const gfx::Rect& clip_rect,
728 const gfx::Size& view_size);
730 // Give key press listeners a chance to handle this key press. This allow
731 // widgets that don't have focus to still handle key presses.
732 bool KeyPressListenersHandleEvent(const NativeWebKeyboardEvent& event);
735 virtual InputEventAckState FilterInputEvent(
736 const blink::WebInputEvent& event,
737 const ui::LatencyInfo& latency_info) OVERRIDE;
738 virtual void IncrementInFlightEventCount() OVERRIDE;
739 virtual void DecrementInFlightEventCount() OVERRIDE;
740 virtual void OnHasTouchEventHandlers(bool has_handlers) OVERRIDE;
741 virtual OverscrollController* GetOverscrollController() const OVERRIDE;
742 virtual void DidFlush() OVERRIDE;
745 virtual void OnKeyboardEventAck(const NativeWebKeyboardEvent& event,
746 InputEventAckState ack_result) OVERRIDE;
747 virtual void OnWheelEventAck(const MouseWheelEventWithLatencyInfo& event,
748 InputEventAckState ack_result) OVERRIDE;
749 virtual void OnTouchEventAck(const TouchEventWithLatencyInfo& event,
750 InputEventAckState ack_result) OVERRIDE;
751 virtual void OnGestureEventAck(const GestureEventWithLatencyInfo& event,
752 InputEventAckState ack_result) OVERRIDE;
753 virtual void OnUnexpectedEventAck(UnexpectedEventAckType type) OVERRIDE;
755 // Called when there is a new auto resize (using a post to avoid a stack
756 // which may get in recursive loops).
757 void DelayedAutoResized();
759 void WindowSnapshotReachedScreen(int snapshot_id);
761 // Our delegate, which wants to know mainly about keyboard events.
762 // It will remain non-NULL until DetachDelegate() is called.
763 RenderWidgetHostDelegate* delegate_;
765 // Created during construction but initialized during Init*(). Therefore, it
766 // is guaranteed never to be NULL, but its channel may be NULL if the
767 // renderer crashed, so you must always check that.
768 RenderProcessHost* process_;
770 // The ID of the corresponding object in the Renderer Instance.
773 // The ID of the surface corresponding to this render widget.
776 // Indicates whether a page is loading or not.
779 // Indicates whether a page is hidden or not.
782 // Indicates whether a page is fullscreen or not.
785 // True when a page is rendered directly via the GPU process.
786 bool is_accelerated_compositing_active_;
788 // True if threaded compositing is enabled on this view.
789 bool is_threaded_compositing_enabled_;
791 // Set if we are waiting for a repaint ack for the view.
792 bool repaint_ack_pending_;
794 // True when waiting for RESIZE_ACK.
795 bool resize_ack_pending_;
797 // Cached copy of the screen info so that it doesn't need to be updated every
798 // time the window is resized.
799 scoped_ptr<blink::WebScreenInfo> screen_info_;
801 // Set if screen_info_ may have changed and should be recomputed and force a
803 bool screen_info_out_of_date_;
805 // The current size of the RenderWidget.
806 gfx::Size current_size_;
808 // The size of the view's backing surface in non-DPI-adjusted pixels.
809 gfx::Size physical_backing_size_;
811 // The height of the physical backing surface that is overdrawn opaquely in
812 // the browser, for example by an on-screen-keyboard (in DPI-adjusted pixels).
813 float overdraw_bottom_height_;
815 // The size we last sent as requested size to the renderer. |current_size_|
816 // is only updated once the resize message has been ack'd. This on the other
817 // hand is updated when the resize message is sent. This is very similar to
818 // |resize_ack_pending_|, but the latter is not set if the new size has width
819 // or height zero, which is why we need this too.
820 gfx::Size last_requested_size_;
822 // The next auto resize to send.
823 gfx::Size new_auto_size_;
825 // True if the render widget host should track the render widget's size as
826 // opposed to visa versa.
827 bool should_auto_resize_;
829 bool waiting_for_screen_rects_ack_;
830 gfx::Rect last_view_screen_rect_;
831 gfx::Rect last_window_screen_rect_;
833 AccessibilityMode accessibility_mode_;
835 // Keyboard event listeners.
836 std::vector<KeyPressEventCallback> key_press_event_callbacks_;
838 // Mouse event callbacks.
839 std::vector<MouseEventCallback> mouse_event_callbacks_;
841 // If true, then we should repaint when restoring even if we have a
842 // backingstore. This flag is set to true if we receive a paint message
843 // while is_hidden_ to true. Even though we tell the render widget to hide
844 // itself, a paint message could already be in flight at that point.
845 bool needs_repainting_on_restore_;
847 // This is true if the renderer is currently unresponsive.
848 bool is_unresponsive_;
850 // The following value indicates a time in the future when we would consider
851 // the renderer hung if it does not generate an appropriate response message.
852 base::Time time_when_considered_hung_;
854 // This value denotes the number of input events yet to be acknowledged
856 int in_flight_event_count_;
858 // This timer runs to check if time_when_considered_hung_ has past.
859 base::OneShotTimer<RenderWidgetHostImpl> hung_renderer_timer_;
861 // Flag to detect recursive calls to GetBackingStore().
862 bool in_get_backing_store_;
864 // Flag to trigger the GetBackingStore method to abort early.
865 bool abort_get_backing_store_;
867 // Set when we call DidPaintRect/DidScrollRect on the view.
868 bool view_being_painted_;
870 // Used for UMA histogram logging to measure the time for a repaint view
871 // operation to finish.
872 base::TimeTicks repaint_start_time_;
874 // Set to true if we shouldn't send input events from the render widget.
875 bool ignore_input_events_;
877 // Indicates whether IME is active.
878 bool input_method_active_;
880 // Set when we update the text direction of the selected input element.
881 bool text_direction_updated_;
882 blink::WebTextDirection text_direction_;
884 // Set when we cancel updating the text direction.
885 // This flag also ignores succeeding update requests until we call
886 // NotifyTextDirection().
887 bool text_direction_canceled_;
889 // Indicates if the next sequence of Char events should be suppressed or not.
890 // System may translate a RawKeyDown event into zero or more Char events,
891 // usually we send them to the renderer directly in sequence. However, If a
892 // RawKeyDown event was not handled by the renderer but was handled by
893 // our UnhandledKeyboardEvent() method, e.g. as an accelerator key, then we
894 // shall not send the following sequence of Char events, which was generated
895 // by this RawKeyDown event, to the renderer. Otherwise the renderer may
896 // handle the Char events and cause unexpected behavior.
897 // For example, pressing alt-2 may let the browser switch to the second tab,
898 // but the Char event generated by alt-2 may also activate a HTML element
899 // if its accesskey happens to be "2", then the user may get confused when
900 // switching back to the original tab, because the content may already be
902 bool suppress_next_char_events_;
904 // The last scroll offset of the render widget.
905 gfx::Vector2d last_scroll_offset_;
907 bool pending_mouse_lock_request_;
908 bool allow_privileged_mouse_lock_;
910 // Keeps track of whether the webpage has any touch event handler. If it does,
911 // then touch events are sent to the renderer. Otherwise, the touch events are
912 // not sent to the renderer.
913 bool has_touch_handler_;
915 base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
917 scoped_ptr<SyntheticGestureController> synthetic_gesture_controller_;
919 // Receives and handles all input events.
920 scoped_ptr<InputRouter> input_router_;
922 scoped_ptr<OverscrollController> overscroll_controller_;
924 scoped_ptr<TimeoutMonitor> hang_monitor_timeout_;
927 std::list<HWND> dummy_windows_for_activation_;
930 // List of callbacks for pending snapshot requests to the renderer.
931 std::queue<base::Callback<void(bool, const SkBitmap&)> > pending_snapshots_;
933 int64 last_input_number_;
935 BrowserRenderingStats rendering_stats_;
937 DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
940 } // namespace content
942 #endif // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_