Revert 263644 "[DevTools] Touch emulation in content."

trunk/src/content/browser/renderer_host/input/touch_emulator.h

-// Copyright 2014 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.
-
-#ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_EMULATOR_H_
-#define CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_EMULATOR_H_
-
-#include "content/browser/renderer_host/input/touch_emulator_client.h"
-#include "content/common/cursors/webcursor.h"
-#include "content/port/common/input_event_ack_state.h"
-#include "third_party/WebKit/public/web/WebInputEvent.h"
-#include "ui/events/gesture_detection/filtered_gesture_provider.h"
-
-namespace content {
-
-// Emulates touch input with mouse and keyboard.
-class CONTENT_EXPORT TouchEmulator : public ui::GestureProviderClient {
- public:
-  explicit TouchEmulator(TouchEmulatorClient* client);
-  virtual ~TouchEmulator();
-
-  void Enable(bool allow_pinch);
-  void Disable();
-
-  // Returns |true| if the event was consumed.
-  // TODO(dgozman): maybe pass latency info together with events.
-  bool HandleMouseEvent(const blink::WebMouseEvent& event);
-  bool HandleMouseWheelEvent(const blink::WebMouseWheelEvent& event);
-  bool HandleKeyboardEvent(const blink::WebKeyboardEvent& event);
-
-  // Returns |true| if the event ack was consumed. Consumed ack should not
-  // propagate any further.
-  bool HandleTouchEventAck(InputEventAckState ack_result);
-
-  // Cancel any touches, for example, when focus is lost.
-  void CancelTouch();
-
- private:
-  // ui::GestureProviderClient implementation.
-  virtual void OnGestureEvent(const ui::GestureEventData& gesture) OVERRIDE;
-
-  void InitCursorFromResource(WebCursor* cursor, int resource_id);
-  void ResetState();
-  void UpdateCursor();
-  bool UpdateShiftPressed(bool shift_pressed);
-
-  // Whether we should convert scrolls into pinches.
-  bool InPinchGestureMode() const;
-
-  bool FillTouchEventAndPoint(const blink::WebMouseEvent& mouse_event);
-  void FillPinchEvent(const blink::WebInputEvent& event);
-
-  // The following methods generate and pass gesture events to the renderer.
-  void PinchBegin(const blink::WebGestureEvent& event);
-  void PinchUpdate(const blink::WebGestureEvent& event);
-  void PinchEnd(const blink::WebGestureEvent& event);
-  void ScrollEnd(const blink::WebGestureEvent& event);
-
-  TouchEmulatorClient* const client_;
-  ui::FilteredGestureProvider gesture_provider_;
-
-  // Disabled emulator does only process touch acks left from previous
-  // emulation. It does not intercept any events.
-  bool enabled_;
-  bool allow_pinch_;
-
-  // While emulation is on, default cursor is touch. Pressing shift changes
-  // cursor to the pinch one.
-  WebCursor pointer_cursor_;
-  WebCursor touch_cursor_;
-  WebCursor pinch_cursor_;
-
-  // These are used to drop extra mouse move events coming too quickly, so
-  // we don't handle too much touches in gesture provider.
-  bool last_mouse_event_was_move_;
-  double last_mouse_move_timestamp_;
-
-  bool mouse_pressed_;
-  bool shift_pressed_;
-
-  blink::WebTouchEvent touch_event_;
-  bool touch_active_;
-
-  // Whether we should suppress next fling cancel. This may happen when we
-  // did not send fling start in pinch mode.
-  bool suppress_next_fling_cancel_;
-
-  blink::WebGestureEvent pinch_event_;
-  // Point which does not move while pinch-zooming.
-  gfx::Point pinch_anchor_;
-  // The cumulative scale change from the start of pinch gesture.
-  float pinch_scale_;
-  bool pinch_gesture_active_;
-
-  DISALLOW_COPY_AND_ASSIGN(TouchEmulator);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_EMULATOR_H_