Support longpress drag selection

content/browser/renderer_host/render_widget_host_view_android.cc

 // 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 "content/browser/renderer_host/render_widget_host_view_android.h"
 
 #include <android/bitmap.h>
 
 #include "base/android/build_info.h"
 #include "base/basictypes.h"
@@ skipping 1312 matching lines @@
     const gfx::PointF& base,
     const gfx::PointF& extent) {
   DCHECK(content_view_core_);
   content_view_core_->SelectBetweenCoordinates(base, extent);
 }
 
 void RenderWidgetHostViewAndroid::OnSelectionEvent(
     ui::SelectionEventType event) {
   DCHECK(content_view_core_);
   DCHECK(selection_controller_);
-  // Showing the selection action bar can alter the current View coordinates in
-  // such a way that the current MotionEvent stream is suddenly shifted in
-  // space. Avoid the associated scroll jump by pre-emptively cancelling gesture
-  // detection; scrolling after the selection is activated is unnecessary.
-  if (event == ui::SelectionEventType::SELECTION_SHOWN)
-    ResetGestureDetection();
   content_view_core_->OnSelectionEvent(
       event, selection_controller_->GetStartPosition(),
       GetSelectionRect(*selection_controller_));
 }
 
 scoped_ptr<ui::TouchHandleDrawable>
 RenderWidgetHostViewAndroid::CreateDrawable() {
   DCHECK(content_view_core_);
   if (!using_browser_compositor_)
     return content_view_core_->CreatePopupTouchHandleDrawable();
@@ skipping 297 matching lines @@
   if (overscroll_controller_)
     overscroll_controller_->OnGestureEventAck(event, ack_result);
 
   if (content_view_core_)
     content_view_core_->OnGestureEventAck(event, ack_result);
 }
 
 InputEventAckState RenderWidgetHostViewAndroid::FilterInputEvent(
     const blink::WebInputEvent& input_event) {
   if (selection_controller_) {
-    switch (input_event.type) {
-      case blink::WebInputEvent::GestureLongPress:
-        selection_controller_->OnLongPressEvent();
-        break;
-      case blink::WebInputEvent::GestureTap:
-        selection_controller_->OnTapEvent();
-        break;
-      default:
-        break;
+    if (input_event.type == blink::WebInputEvent::GestureLongPress) {
+      const blink::WebGestureEvent& longpress =
+          static_cast<const blink::WebGestureEvent&>(input_event);
+      selection_controller_->OnLongPressEvent(
+          gfx::PointF(longpress.x, longpress.y));
+    } else if (input_event.type == blink::WebInputEvent::GestureTap) {
+      selection_controller_->OnTapEvent();
     }
   }
 
   if (overscroll_controller_ &&
       blink::WebInputEvent::isGestureEventType(input_event.type) &&
       overscroll_controller_->WillHandleGestureEvent(
           static_cast<const blink::WebGestureEvent&>(input_event))) {
     return INPUT_EVENT_ACK_STATE_CONSUMED;
   }
 
@@ skipping 424 matching lines @@
   results->orientationAngle = display.RotationAsDegree();
   results->orientationType =
       RenderWidgetHostViewBase::GetOrientationTypeForMobile(display);
   gfx::DeviceDisplayInfo info;
   results->depth = info.GetBitsPerPixel();
   results->depthPerComponent = info.GetBitsPerComponent();
   results->isMonochrome = (results->depthPerComponent == 0);
 }
 
 } // namespace content