Initial browser-side implementation for touch-action

content/browser/renderer_host/input/immediate_input_router.h

 // Copyright 2013 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_IMMEDIATE_INPUT_ROUTER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_IMMEDIATE_INPUT_ROUTER_H_
 
 #include <queue>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "content/browser/renderer_host/input/gesture_event_filter.h"
 #include "content/browser/renderer_host/input/input_router.h"
 #include "content/browser/renderer_host/input/touch_event_queue.h"
 #include "content/browser/renderer_host/input/touchpad_tap_suppression_controller.h"
 #include "content/public/browser/native_web_keyboard_event.h"
+#include "content/public/common/touch_action.h"
 
 namespace IPC {
 class Sender;
 }
 
 namespace ui {
 struct LatencyInfo;
 }
 
 namespace content {
@@ skipping 88 matching lines @@
                        const ui::LatencyInfo& latency_info,
                        bool is_keyboard_shortcut);
 
   // IPC message handlers
   void OnInputEventAck(WebKit::WebInputEvent::Type event_type,
                        InputEventAckState ack_result,
                        const ui::LatencyInfo& latency_info);
   void OnMsgMoveCaretAck();
   void OnSelectRangeAck();
   void OnHasTouchEventHandlers(bool has_handlers);
+  void OnSetTouchAction(int touch_id, content::TouchAction touchAction);
 
   // Indicates the source of an ack provided to |ProcessInputEventAck()|.
   // The source is tracked by |current_ack_source_|, which aids in ack routing.
   enum AckSource {
     RENDERER,
     CLIENT,
     OVERSCROLL_CONTROLLER,
     ACK_SOURCE_NONE
   };
   // Note: This function may result in |this| being deleted, and as such
@@ skipping 24 matching lines @@
 
   // Forwards the event ack to |touch_event_queue_|, potentially triggering
   // dispatch of queued touch events, or the creation of gesture events.
   void ProcessTouchAck(InputEventAckState ack_result,
                        const ui::LatencyInfo& latency);
 
   // Forwards |ack_result| to the client's OverscrollController, if necessary.
   void ProcessAckForOverscroll(const WebKit::WebInputEvent& event,
                                InputEventAckState ack_result);
 
-  void HandleGestureScroll(const GestureEventWithLatencyInfo& gesture_event);
+  bool FilterTouchAction(const GestureEventWithLatencyInfo& gesture_event);
 
   void SimulateTouchGestureWithMouse(
       const MouseEventWithLatencyInfo& mouse_event);
 
   bool IsInOverscrollGesture() const;
 
   int routing_id() const { return routing_id_; }
 
 
   IPC::Sender* sender_;
@@ skipping 46 matching lines @@
   // A queue of keyboard events. We can't trust data from the renderer so we
   // stuff key events into a queue and pop them out on ACK, feeding our copy
   // back to whatever unhandled handler instead of the returned version.
   KeyQueue key_queue_;
 
   // Keeps track of whether the webpage has any touch event handler. If it does,
   // then touch events are sent to the renderer. Otherwise, the touch events are
   // not sent to the renderer.
   bool has_touch_handler_;
 
+  // Whether GestureScroll events should be discarded due to touch-action.
+  bool drop_scroll_gesture_events_;
+
+  // What touch actions are currently permitted.
+  content::TouchAction allowed_touch_action_;
+
   // The source of the ack within the scope of |ProcessInputEventAck()|.
   // Defaults to ACK_SOURCE_NONE.
   AckSource current_ack_source_;
 
   scoped_ptr<TouchEventQueue> touch_event_queue_;
   scoped_ptr<GestureEventFilter> gesture_event_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(ImmediateInputRouter);
 };
 
 }  // namespace content
 
 #endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_IMMEDIATE_INPUT_ROUTER_H_