Initial browser-side implementation for touch-action

content/browser/renderer_host/input/input_router_impl.cc

 // 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.
 
 #include "content/browser/renderer_host/input/input_router_impl.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "content/browser/renderer_host/input/gesture_event_filter.h"
 #include "content/browser/renderer_host/input/input_ack_handler.h"
 #include "content/browser/renderer_host/input/input_router_client.h"
 #include "content/browser/renderer_host/input/touch_event_queue.h"
 #include "content/browser/renderer_host/input/touchpad_tap_suppression_controller.h"
 #include "content/browser/renderer_host/overscroll_controller.h"
 #include "content/common/content_constants_internal.h"
 #include "content/common/edit_command.h"
+#include "content/common/input/touch_action.h"
 #include "content/common/input/web_input_event_traits.h"
 #include "content/common/input_messages.h"
 #include "content/common/view_messages.h"
 #include "content/port/common/input_event_ack_state.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/common/content_switches.h"
 #include "ipc/ipc_sender.h"
 #include "ui/events/event.h"
@@ skipping 141 matching lines @@
   HISTOGRAM_COUNTS_100("Renderer.KeyboardQueueSize", key_queue_.size());
 
   gesture_event_filter_->FlingHasBeenHalted();
 
   // Only forward the non-native portions of our event.
   FilterAndSendWebInputEvent(key_event, latency_info, is_keyboard_shortcut);
 }
 
 void InputRouterImpl::SendGestureEvent(
     const GestureEventWithLatencyInfo& gesture_event) {
+  if (touch_action_filter_.FilterGestureEvent(gesture_event.event))
+    return;
+
   HandleGestureScroll(gesture_event);
 
   if (!IsInOverscrollGesture() &&
       !gesture_event_filter_->ShouldForward(gesture_event)) {
     OverscrollController* controller = client_->GetOverscrollController();
     if (controller)
       controller->DiscardingGestureEvent(gesture_event.event);
     return;
   }
 
@@ skipping 54 matching lines @@
 
 bool InputRouterImpl::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   bool message_is_ok = true;
   IPC_BEGIN_MESSAGE_MAP_EX(InputRouterImpl, message, message_is_ok)
     IPC_MESSAGE_HANDLER(InputHostMsg_HandleInputEvent_ACK, OnInputEventAck)
     IPC_MESSAGE_HANDLER(ViewHostMsg_MoveCaret_ACK, OnMsgMoveCaretAck)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectRange_ACK, OnSelectRangeAck)
     IPC_MESSAGE_HANDLER(ViewHostMsg_HasTouchEventHandlers,
                         OnHasTouchEventHandlers)
+    IPC_MESSAGE_HANDLER(InputHostMsg_SetTouchAction,
+                        OnSetTouchAction)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
   if (!message_is_ok)
     ack_handler_->OnUnexpectedEventAck(InputAckHandler::BAD_ACK_MESSAGE);
 
   return handled;
 }
 
 void InputRouterImpl::OnTouchEventAck(const TouchEventWithLatencyInfo& event,
@@ skipping 199 matching lines @@
 
 void InputRouterImpl::OnHasTouchEventHandlers(bool has_handlers) {
  if (has_touch_handler_ == has_handlers)
     return;
   has_touch_handler_ = has_handlers;
   if (!has_handlers)
     touch_event_queue_->FlushQueue();
   client_->OnHasTouchEventHandlers(has_handlers);
 }
 
+void InputRouterImpl::OnSetTouchAction(
+    content::TouchAction touch_action) {
+  // Synthetic touchstart events should get filtered out in RenderWidget.
+  DCHECK(touch_event_queue_->IsPendingAckTouchStart());
+
+  touch_action_filter_.OnSetTouchAction(touch_action);
+}
+
 void InputRouterImpl::ProcessInputEventAck(
     WebInputEvent::Type event_type,
     InputEventAckState ack_result,
     const ui::LatencyInfo& latency_info,
     AckSource ack_source) {
   TRACE_EVENT2("input", "InputRouterImpl::ProcessInputEventAck",
                "type", WebInputEventTraits::GetName(event_type),
                "ack", GetEventAckName(ack_result));
 
   // Note: The keyboard ack must be treated carefully, as it may result in
@@ skipping 198 matching lines @@
       break;
   }
 }
 
 bool InputRouterImpl::IsInOverscrollGesture() const {
   OverscrollController* controller = client_->GetOverscrollController();
   return controller && controller->overscroll_mode() != OVERSCROLL_NONE;
 }
 
 }  // namespace content