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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <deque>
#include <map>
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/observer_list.h"
#include "base/time/time.h"
#include "content/common/content_export.h"
#include "content/common/cursors/webcursor.h"
#include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
#include "content/common/input/synthetic_gesture_params.h"
#include "content/renderer/message_delivery_policy.h"
#include "ipc/ipc_listener.h"
#include "ipc/ipc_sender.h"
#include "third_party/WebKit/public/platform/WebDisplayMode.h"
#include "third_party/WebKit/public/platform/WebRect.h"
#include "third_party/WebKit/public/web/WebCompositionUnderline.h"
#include "third_party/WebKit/public/web/WebInputEvent.h"
#include "third_party/WebKit/public/web/WebPopupType.h"
#include "third_party/WebKit/public/web/WebTextDirection.h"
#include "third_party/WebKit/public/web/WebTextInputInfo.h"
#include "third_party/WebKit/public/web/WebTouchAction.h"
#include "third_party/WebKit/public/web/WebWidget.h"
#include "third_party/WebKit/public/web/WebWidgetClient.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/base/ime/text_input_mode.h"
#include "ui/base/ime/text_input_type.h"
#include "ui/base/ui_base_types.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/vector2d.h"
#include "ui/gfx/geometry/vector2d_f.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gfx/range/range.h"
#include "ui/surface/transport_dib.h"
struct ViewHostMsg_UpdateRect_Params;
struct ViewMsg_Resize_Params;
class ViewHostMsg_UpdateRect;
namespace IPC {
class SyncMessage;
class SyncMessageFilter;
namespace blink {
struct WebDeviceEmulationParams;
class WebFrameWidget;
class WebGestureEvent;
class WebKeyboardEvent;
class WebLocalFrame;
class WebMouseEvent;
class WebNode;
struct WebPoint;
class WebTouchEvent;
class WebView;
namespace cc {
struct InputHandlerScrollResult;
class OutputSurface;
class SwapPromise;
namespace gfx {
class Range;
namespace scheduler {
class RenderWidgetSchedulingState;
namespace content {
class CompositorDependencies;
class ExternalPopupMenu;
class FrameSwapMessageQueue;
class ImeEventGuard;
class PepperPluginInstanceImpl;
class RenderFrameImpl;
class RenderFrameProxy;
class RenderWidgetCompositor;
class RenderWidgetTest;
class ResizingModeSelector;
struct ContextMenuParams;
struct DidOverscrollParams;
struct WebPluginGeometry;
// RenderWidget provides a communication bridge between a WebWidget and
// a RenderWidgetHost, the latter of which lives in a different process.
// RenderWidget is used to implement:
// - RenderViewImpl (deprecated)
// - Fullscreen mode (RenderWidgetFullScreen)
// - Popup "menus" (like the color chooser and date picker)
// - Widgets for frames (for out-of-process iframe support)
class CONTENT_EXPORT RenderWidget
: public IPC::Listener,
public IPC::Sender,
NON_EXPORTED_BASE(virtual public blink::WebWidgetClient),
public base::RefCounted<RenderWidget> {
// Creates a new RenderWidget. The opener_id is the routing ID of the
// RenderView that this widget lives inside.
static RenderWidget* Create(int32 opener_id,
CompositorDependencies* compositor_deps,
blink::WebPopupType popup_type,
const blink::WebScreenInfo& screen_info);
// Creates a new RenderWidget that will be attached to a RenderFrame.
static RenderWidget* CreateForFrame(int routing_id,
bool hidden,
const blink::WebScreenInfo& screen_info,
CompositorDependencies* compositor_deps,
blink::WebLocalFrame* frame);
// Closes a RenderWidget that was created by |CreateForFrame|.
// TODO(avi): De-virtualize this once RenderViewImpl has-a RenderWidget.
virtual void CloseForFrame();
int32 routing_id() const { return routing_id_; }
CompositorDependencies* compositor_deps() const { return compositor_deps_; }
blink::WebWidget* webwidget() const { return webwidget_; }
gfx::Size size() const { return size_; }
bool is_fullscreen_granted() const { return is_fullscreen_granted_; }
blink::WebDisplayMode display_mode() const { return display_mode_; }
bool is_hidden() const { return is_hidden_; }
bool handling_input_event() const { return handling_input_event_; }
// Temporary for debugging purposes...
bool closing() const { return closing_; }
bool is_swapped_out() { return is_swapped_out_; }
bool for_oopif() { return for_oopif_; }
ui::MenuSourceType context_menu_source_type() {
return context_menu_source_type_;
bool has_host_context_menu_location() {
return has_host_context_menu_location_;
gfx::Point host_context_menu_location() {
return host_context_menu_location_;
// ScreenInfo exposed so it can be passed to subframe RenderWidgets.
blink::WebScreenInfo screen_info() const { return screen_info_; }
// Functions to track out-of-process frames for special notifications.
void RegisterRenderFrameProxy(RenderFrameProxy* proxy);
void UnregisterRenderFrameProxy(RenderFrameProxy* proxy);
// Functions to track all RenderFrame objects associated with this
// RenderWidget.
void RegisterRenderFrame(RenderFrameImpl* frame);
void UnregisterRenderFrame(RenderFrameImpl* frame);
#if defined(VIDEO_HOLE)
void RegisterVideoHoleFrame(RenderFrameImpl* frame);
void UnregisterVideoHoleFrame(RenderFrameImpl* frame);
#endif // defined(VIDEO_HOLE)
// IPC::Listener
bool OnMessageReceived(const IPC::Message& msg) override;
// IPC::Sender
bool Send(IPC::Message* msg) override;
// blink::WebWidgetClient
void didAutoResize(const blink::WebSize& new_size) override;
void initializeLayerTreeView() override;
blink::WebLayerTreeView* layerTreeView() override;
void didMeaningfulLayout(blink::WebMeaningfulLayout layout_type) override;
void didFocus() override;
void didChangeCursor(const blink::WebCursorInfo&) override;
void closeWidgetSoon() override;
void show(blink::WebNavigationPolicy) override;
blink::WebRect windowRect() override;
void setToolTipText(const blink::WebString& text,
blink::WebTextDirection hint) override;
void setWindowRect(const blink::WebRect&) override;
blink::WebRect windowResizerRect() override;
blink::WebRect rootWindowRect() override;
blink::WebScreenInfo screenInfo() override;
void resetInputMethod() override;
void didHandleGestureEvent(const blink::WebGestureEvent& event,
bool event_cancelled) override;
void didOverscroll(const blink::WebFloatSize& unusedDelta,
const blink::WebFloatSize& accumulatedRootOverScroll,
const blink::WebFloatPoint& position,
const blink::WebFloatSize& velocity) override;
void showImeIfNeeded() override;
// Converts the |rect| from Viewport coordinates to Window coordinates.
// See RenderView::convertViewportToWindow for more details.
void convertViewportToWindow(blink::WebRect* rect);
#if defined(OS_ANDROID)
// Notifies that a tap was not consumed, so showing a UI for the unhandled
// tap may be needed.
// Performs various checks on the given WebNode to apply heuristics to
// determine if triggering is appropriate.
void showUnhandledTapUIIfNeeded(const blink::WebPoint& tapped_position,
const blink::WebNode& tapped_node,
bool page_changed) override;
// Begins the compositor's scheduler to start producing frames.
void StartCompositor();
// Stop compositing.
void WillCloseLayerTreeView();
// Called when a plugin is moved. These events are queued up and sent with
// the next paint or scroll message to the host.
void SchedulePluginMove(const WebPluginGeometry& move);
// Called when a plugin window has been destroyed, to make sure the currently
// pending moves don't try to reference it.
void CleanupWindowInPluginMoves(gfx::PluginWindowHandle window);
RenderWidgetCompositor* compositor() const;
virtual scoped_ptr<cc::OutputSurface> CreateOutputSurface(bool fallback);
// Callback for use with synthetic gestures (e.g. BeginSmoothScroll).
typedef base::Callback<void()> SyntheticGestureCompletionCallback;
// Send a synthetic gesture to the browser to be queued to the synthetic
// gesture controller.
void QueueSyntheticGesture(
scoped_ptr<SyntheticGestureParams> gesture_params,
const SyntheticGestureCompletionCallback& callback);
// Deliveres |message| together with compositor state change updates. The
// exact behavior depends on |policy|.
// This mechanism is not a drop-in replacement for IPC: messages sent this way
// will not be automatically available to BrowserMessageFilter, for example.
// FIFO ordering is preserved between messages enqueued with the same
// |policy|, the ordering between messages enqueued for different policies is
// undefined.
// |msg| message to send, ownership of |msg| is transferred.
// |policy| see the comment on MessageDeliveryPolicy.
void QueueMessage(IPC::Message* msg, MessageDeliveryPolicy policy);
// Handle start and finish of IME event guard.
void OnImeEventGuardStart(ImeEventGuard* guard);
void OnImeEventGuardFinish(ImeEventGuard* guard);
// Returns whether we currently should handle an IME event.
bool ShouldHandleImeEvent();
// Called by the compositor when page scale animation completed.
virtual void DidCompletePageScaleAnimation() {}
// When paused in debugger, we send ack for mouse event early. This ensures
// that we continue receiving mouse moves and pass them to debugger. Returns
// whether we are paused in mouse move event and have sent the ack.
bool SendAckForMouseMoveFromDebugger();
// When resumed from pause in debugger while handling mouse move,
// we should not send an extra ack (see SendAckForMouseMoveFromDebugger).
void IgnoreAckForMouseMoveFromDebugger();
// ScreenMetricsEmulator class manages screen emulation inside a render
// widget. This includes resizing, placing view on the screen at desired
// position, changing device scale factor, and scaling down the whole
// widget if required to fit into the browser window.
class ScreenMetricsEmulator;
void SetPopupOriginAdjustmentsForEmulation(ScreenMetricsEmulator* emulator);
gfx::Rect AdjustValidationMessageAnchor(const gfx::Rect& anchor);
// Indicates that the compositor is about to begin a frame. This is primarily
// to signal to flow control mechanisms that a frame is beginning, not to
// perform actual painting work.
void WillBeginCompositorFrame();
// Notifies about a compositor frame commit operation having finished.
virtual void DidCommitCompositorFrame();
// Notifies that the draw commands for a committed frame have been issued.
void DidCommitAndDrawCompositorFrame();
// Notifies that the compositor has posted a swapbuffers operation to the GPU
// process.
void DidCompleteSwapBuffers();
void ScheduleComposite();
void ScheduleCompositeWithForcedRedraw();
// Called by the compositor in single-threaded mode when a swap is posted,
// completes or is aborted.
void OnSwapBuffersPosted();
void OnSwapBuffersComplete();
void OnSwapBuffersAborted();
// Checks if the selection bounds have been changed. If they are changed,
// the new value will be sent to the browser process.
void UpdateSelectionBounds();
// Called by the compositor to forward a proto that represents serialized
// compositor state.
void ForwardCompositorProto(const std::vector<uint8_t>& proto);
virtual void GetSelectionBounds(gfx::Rect* start, gfx::Rect* end);
void OnShowHostContextMenu(ContextMenuParams* params);
enum ShowIme {
enum ChangeSource {
// |show_ime| should be SHOW_IME_IF_NEEDED iff the update may cause the ime to
// be displayed, e.g. after a tap on an input field on mobile.
// |change_source| should be FROM_NON_IME when the renderer has to wait for
// the browser to acknowledge the change before the renderer handles any more
// IME events. This is when the text change did not originate from the IME in
// the browser side, such as changes by JavaScript or autofill.
void UpdateTextInputState(ShowIme show_ime, ChangeSource change_source);
// Called when animations due to focus change have completed (if any). Can be
// called from the renderer, browser, or compositor.
virtual void FocusChangeComplete() {}
// Checks if the composition range or composition character bounds have been
// changed. If they are changed, the new value will be sent to the browser
// process. This method does nothing when the browser process is not able to
// handle composition range and composition character bounds.
void UpdateCompositionInfo(bool should_update_range);
bool host_closing() const { return host_closing_; }
// Friend RefCounted so that the dtor can be non-public. Using this class
// without ref-counting is an error.
friend class base::RefCounted<RenderWidget>;
// For unit tests.
friend class RenderWidgetTest;
enum ResizeAck {
RenderWidget(CompositorDependencies* compositor_deps,
blink::WebPopupType popup_type,
const blink::WebScreenInfo& screen_info,
bool swapped_out,
bool hidden,
bool never_visible);
~RenderWidget() override;
static blink::WebWidget* CreateWebFrameWidget(RenderWidget* render_widget,
blink::WebLocalFrame* frame);
// Creates a WebWidget based on the popup type.
static blink::WebWidget* CreateWebWidget(RenderWidget* render_widget);
// Initializes this view with the given opener.
bool Init(int32 opener_id);
// Called by Init and subclasses to perform initialization.
bool DoInit(int32 opener_id,
blink::WebWidget* web_widget,
IPC::SyncMessage* create_widget_message);
// Sets whether this RenderWidget has been swapped out to be displayed by
// a RenderWidget in a different process. If so, no new IPC messages will be
// sent (only ACKs) and the process is free to exit when there are no other
// active RenderWidgets.
void SetSwappedOut(bool is_swapped_out);
// Allows the process to exit once the unload handler has finished, if there
// are no other active RenderWidgets.
void WasSwappedOut();
void FlushPendingInputEventAck();
void DoDeferredClose();
void NotifyOnClose();
// Close the underlying WebWidget.
virtual void Close();
// Resizes the render widget.
void Resize(const gfx::Size& new_size,
const gfx::Size& physical_backing_size,
bool top_controls_shrink_blink_size,
float top_controls_height,
const gfx::Size& visible_viewport_size,
const gfx::Rect& resizer_rect,
bool is_fullscreen_granted,
blink::WebDisplayMode display_mode,
ResizeAck resize_ack);
// Used to force the size of a window when running layout tests.
void SetWindowRectSynchronously(const gfx::Rect& new_window_rect);
virtual void SetScreenMetricsEmulationParameters(
bool enabled,
const blink::WebDeviceEmulationParams& params);
#if defined(OS_MACOSX) || defined(OS_ANDROID)
void SetExternalPopupOriginAdjustmentsForEmulation(
ExternalPopupMenu* popup, ScreenMetricsEmulator* emulator);
// RenderWidget IPC message handlers
void OnHandleInputEvent(const blink::WebInputEvent* event,
const ui::LatencyInfo& latency_info);
void OnCursorVisibilityChange(bool is_visible);
void OnMouseCaptureLost();
virtual void OnSetFocus(bool enable);
void OnClose();
void OnCreatingNewAck();
virtual void OnResize(const ViewMsg_Resize_Params& params);
void OnEnableDeviceEmulation(const blink::WebDeviceEmulationParams& params);
void OnDisableDeviceEmulation();
void OnColorProfile(const std::vector<char>& color_profile);
void OnChangeResizeRect(const gfx::Rect& resizer_rect);
virtual void OnWasHidden();
virtual void OnWasShown(bool needs_repainting,
const ui::LatencyInfo& latency_info);
void OnCreateVideoAck(int32 video_id);
void OnUpdateVideoAck(int32 video_id);
void OnRequestMoveAck();
virtual void OnImeSetComposition(
const base::string16& text,
const std::vector<blink::WebCompositionUnderline>& underlines,
int selection_start,
int selection_end);
virtual void OnImeConfirmComposition(const base::string16& text,
const gfx::Range& replacement_range,
bool keep_selection);
void OnRepaint(gfx::Size size_to_paint);
void OnSyntheticGestureCompleted();
void OnSetTextDirection(blink::WebTextDirection direction);
void OnGetFPS();
void OnUpdateScreenRects(const gfx::Rect& view_screen_rect,
const gfx::Rect& window_screen_rect);
void OnShowImeIfNeeded();
void OnSetSurfaceIdNamespace(uint32_t surface_id_namespace);
void OnHandleCompositorProto(const std::vector<uint8_t>& proto);
#if defined(OS_ANDROID)
// Called when we send IME event that expects an ACK.
void OnImeEventSentForAck(const blink::WebTextInputInfo& info);
// Called by the browser process for every required IME acknowledgement.
void OnImeEventAck();
// Notify the compositor about a change in viewport size. This should be
// used only with auto resize mode WebWidgets, as normal WebWidgets should
// go through OnResize.
void AutoResizeCompositor();
virtual void SetDeviceScaleFactor(float device_scale_factor);
virtual bool SetDeviceColorProfile(const std::vector<char>& color_profile);
virtual void ResetDeviceColorProfileForTesting();
virtual void OnOrientationChange();
// Override points to notify derived classes that a paint has happened.
// DidInitiatePaint happens when that has completed, and subsequent rendering
// won't affect the painted content. DidFlushPaint happens once we've received
// the ACK that the screen has been updated. For a given paint operation,
// these overrides will always be called in the order DidInitiatePaint,
// DidFlushPaint.
virtual void DidInitiatePaint() {}
virtual void DidFlushPaint() {}
virtual GURL GetURLForGraphicsContext3D();
// Gets the scroll offset of this widget, if this widget has a notion of
// scroll offset.
virtual gfx::Vector2d GetScrollOffset();
// Sets the "hidden" state of this widget. All accesses to is_hidden_ should
// use this method so that we can properly inform the RenderThread of our
// state.
void SetHidden(bool hidden);
void DidToggleFullscreen();
bool next_paint_is_resize_ack() const;
void set_next_paint_is_resize_ack();
void set_next_paint_is_repaint_ack();
// QueueMessage implementation extracted into a static method for easy
// testing.
static scoped_ptr<cc::SwapPromise> QueueMessageImpl(
IPC::Message* msg,
MessageDeliveryPolicy policy,
FrameSwapMessageQueue* frame_swap_message_queue,
scoped_refptr<IPC::SyncMessageFilter> sync_message_filter,
int source_frame_number);
// Override point to obtain that the current input method state and caret
// position.
virtual ui::TextInputType GetTextInputType();
virtual ui::TextInputType WebKitToUiTextInputType(
blink::WebTextInputType type);
// Override point to obtain that the current composition character bounds.
// In the case of surrogate pairs, the character is treated as two characters:
// the bounds for first character is actual one, and the bounds for second
// character is zero width rectangle.
virtual void GetCompositionCharacterBounds(
std::vector<gfx::Rect>* character_bounds);
// Returns the range of the text that is being composed or the selection if
// the composition does not exist.
virtual void GetCompositionRange(gfx::Range* range);
// Returns true if the composition range or composition character bounds
// should be sent to the browser process.
bool ShouldUpdateCompositionInfo(
const gfx::Range& range,
const std::vector<gfx::Rect>& bounds);
// Override point to obtain that the current input method state about
// composition text.
virtual bool CanComposeInline();
// Set the pending window rect.
// Because the real render_widget is hosted in another process, there is
// a time period where we may have set a new window rect which has not yet
// been processed by the browser. So we maintain a pending window rect
// size. If JS code sets the WindowRect, and then immediately calls
// GetWindowRect() we'll use this pending window rect as the size.
void SetPendingWindowRect(const blink::WebRect& r);
// Called by OnHandleInputEvent() to notify subclasses that a key event was
// just handled.
virtual void DidHandleKeyEvent() {}
// Called by OnHandleInputEvent() to notify subclasses that a mouse event is
// about to be handled.
// Returns true if no further handling is needed. In that case, the event
// won't be sent to WebKit or trigger DidHandleMouseEvent().
virtual bool WillHandleMouseEvent(const blink::WebMouseEvent& event);
// Called by OnHandleInputEvent() to notify subclasses that a gesture event is
// about to be handled.
// Returns true if no further handling is needed. In that case, the event
// won't be sent to WebKit.
virtual bool WillHandleGestureEvent(const blink::WebGestureEvent& event);
// Called by OnHandleInputEvent() to forward a mouse wheel event to the
// compositor thread, to effect the elastic overscroll effect.
void ObserveWheelEventAndResult(const blink::WebMouseWheelEvent& wheel_event,
const gfx::Vector2dF& wheel_unused_delta,
bool event_processed);
// Check whether the WebWidget has any touch event handlers registered
// at the given point.
virtual bool HasTouchEventHandlersAt(const gfx::Point& point) const;
// Check whether the WebWidget has any touch event handlers registered.
void hasTouchEventHandlers(bool has_handlers) override;
// Tell the browser about the actions permitted for a new touch point.
void setTouchAction(blink::WebTouchAction touch_action) override;
// Called when value of focused text field gets dirty, e.g. value is modified
// by script, not by user input.
void didUpdateTextOfFocusedElementByNonUserInput() override;
// Creates a 3D context associated with this view.
scoped_ptr<WebGraphicsContext3DCommandBufferImpl> CreateGraphicsContext3D(
bool compositor);
// Routing ID that allows us to communicate to the parent browser process
// RenderWidgetHost. When MSG_ROUTING_NONE, no messages may be sent.
int32 routing_id_;
// Dependencies for initializing a compositor, including flags for optional
// features.
CompositorDependencies* const compositor_deps_;
// We are responsible for destroying this object via its Close method.
// May be NULL when the window is closing.
blink::WebWidget* webwidget_;
// This is lazily constructed and must not outlive webwidget_.
scoped_ptr<RenderWidgetCompositor> compositor_;
// Set to the ID of the view that initiated creating this view, if any. When
// the view was initiated by the browser (the common case), this will be
// MSG_ROUTING_NONE. This is used in determining ownership when opening
// child tabs. See RenderWidget::createWebViewWithRequest.
// This ID may refer to an invalid view if that view is closed before this
// view is.
int32 opener_id_;
// The rect where this view should be initially shown.
gfx::Rect initial_rect_;
// We store the current cursor object so we can avoid spamming SetCursor
// messages.
WebCursor current_cursor_;
// The size of the RenderWidget.
gfx::Size size_;
// The size of the view's backing surface in non-DPI-adjusted pixels.
gfx::Size physical_backing_size_;
// Whether or not Blink's viewport size should be shrunk by the height of the
// URL-bar (always false on platforms where URL-bar hiding isn't supported).
bool top_controls_shrink_blink_size_;
// The height of the top controls (always 0 on platforms where URL-bar hiding
// isn't supported).
float top_controls_height_;
// The size of the visible viewport in DPI-adjusted pixels.
gfx::Size visible_viewport_size_;
// The area that must be reserved for drawing the resize corner.
gfx::Rect resizer_rect_;
// Flags for the next ViewHostMsg_UpdateRect message.
int next_paint_flags_;
// Whether the WebWidget is in auto resize mode, which is used for example
// by extension popups.
bool auto_resize_mode_;
// True if we need to send an UpdateRect message to notify the browser about
// an already-completed auto-resize.
bool need_update_rect_for_auto_resize_;
// Set to true if we should ignore RenderWidget::Show calls.
bool did_show_;
// Indicates that we shouldn't bother generated paint events.
bool is_hidden_;
// Indicates that we are never visible, so never produce graphical output.
const bool compositor_never_visible_;
// Indicates whether tab-initiated fullscreen was granted.
bool is_fullscreen_granted_;
// Indicates the display mode.
blink::WebDisplayMode display_mode_;
// Are we currently handling an input event?
bool handling_input_event_;
// Used to intercept overscroll notifications while an event is being
// handled. If the event causes overscroll, the overscroll metadata can be
// bundled in the event ack, saving an IPC. Note that we must continue
// supporting overscroll IPC notifications due to fling animation updates.
scoped_ptr<DidOverscrollParams>* handling_event_overscroll_;
// It is possible that one ImeEventGuard is nested inside another
// ImeEventGuard. We keep track of the outermost one, and update it as needed.
ImeEventGuard* ime_event_guard_;
// Type of the input event we are currently handling.
blink::WebInputEvent::Type handling_event_type_;
// Whether we should not send ack for the current mouse move.
bool ignore_ack_for_mouse_move_from_debugger_;
// True if we have requested this widget be closed. No more messages will
// be sent, except for a Close.
bool closing_;
// True if it is known that the host is in the process of being shut down.
bool host_closing_;
// Whether this RenderWidget is currently swapped out, such that the view is
// being rendered by another process. If all RenderWidgets in a process are
// swapped out, the process can exit.
bool is_swapped_out_;
// TODO(simonhong): Remove this when we enable BeginFrame scheduling for
// Whether this RenderWidget is for an out-of-process iframe or not.
bool for_oopif_;
// Stores information about the current text input.
blink::WebTextInputInfo text_input_info_;
// Stores the current text input type of |webwidget_|.
ui::TextInputType text_input_type_;
// Stores the current text input mode of |webwidget_|.
ui::TextInputMode text_input_mode_;
// Stores the current text input flags of |webwidget_|.
int text_input_flags_;
// Stores the current type of composition text rendering of |webwidget_|.
bool can_compose_inline_;
// Stores the current selection bounds.
gfx::Rect selection_focus_rect_;
gfx::Rect selection_anchor_rect_;
// Stores the current composition character bounds.
std::vector<gfx::Rect> composition_character_bounds_;
// Stores the current composition range.
gfx::Range composition_range_;
// The kind of popup this widget represents, NONE if not a popup.
blink::WebPopupType popup_type_;
// Holds all the needed plugin window moves for a scroll.
typedef std::vector<WebPluginGeometry> WebPluginGeometryVector;
WebPluginGeometryVector plugin_window_moves_;
// While we are waiting for the browser to update window sizes, we track the
// pending size temporarily.
int pending_window_rect_count_;
blink::WebRect pending_window_rect_;
// The screen rects of the view and the window that contains it.
gfx::Rect view_screen_rect_;
gfx::Rect window_screen_rect_;
scoped_ptr<IPC::Message> pending_input_event_ack_;
// The time spent in input handlers this frame. Used to throttle input acks.
base::TimeDelta total_input_handling_time_this_frame_;
// Indicates if the next sequence of Char events should be suppressed or not.
bool suppress_next_char_events_;
// Properties of the screen hosting this RenderWidget instance.
blink::WebScreenInfo screen_info_;
// The device scale factor. This value is computed from the DPI entries in
// |screen_info_| on some platforms, and defaults to 1 on other platforms.
float device_scale_factor_;
// The device color profile on supported platforms.
std::vector<char> device_color_profile_;
// State associated with synthetic gestures. Synthetic gestures are processed
// in-order, so a queue is sufficient to identify the correct state for a
// completed gesture.
uint32 next_output_surface_id_;
#if defined(OS_ANDROID)
// Indicates value in the focused text field is in dirty state, i.e. modified
// by script etc., not by user input.
bool text_field_is_dirty_;
// Stores the history of text input infos from the last ACK'ed one from the
// current one. The size is the number of pending ACKs plus one, since we
// intentionally keep the last ack'd value to know what the browser is
// currently aware of.
std::deque<blink::WebTextInputInfo> text_input_info_history_;
scoped_ptr<ScreenMetricsEmulator> screen_metrics_emulator_;
// Popups may be displaced when screen metrics emulation is enabled.
// These values are used to properly adjust popup position.
gfx::Point popup_view_origin_for_emulation_;
gfx::Point popup_screen_origin_for_emulation_;
float popup_origin_scale_for_emulation_;
scoped_refptr<FrameSwapMessageQueue> frame_swap_message_queue_;
scoped_ptr<ResizingModeSelector> resizing_mode_selector_;
// Lists of RenderFrameProxy objects that need to be notified of
// compositing-related events (e.g. DidCommitCompositorFrame).
base::ObserverList<RenderFrameProxy> render_frame_proxies_;
#if defined(VIDEO_HOLE)
base::ObserverList<RenderFrameImpl> video_hole_frames_;
#endif // defined(VIDEO_HOLE)
// A list of RenderFrames associated with this RenderWidget. Notifications
// are sent to each frame in the list for events such as changing
// visibility state for example.
base::ObserverList<RenderFrameImpl> render_frames_;
ui::MenuSourceType context_menu_source_type_;
bool has_host_context_menu_location_;
gfx::Point host_context_menu_location_;
} // namespace content