Move middle-click autoscroll to synthetic fling.

third_party/WebKit/Source/core/input/MouseEventManager.cpp

 // Copyright 2016 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 "core/input/MouseEventManager.h"
 
 #include "core/clipboard/DataObject.h"
 #include "core/clipboard/DataTransfer.h"
 #include "core/dom/Element.h"
 #include "core/dom/ElementTraversal.h"
@@ skipping 73 matching lines @@
   Clear();
 }
 
 void MouseEventManager::Clear() {
   node_under_mouse_ = nullptr;
   mouse_press_node_ = nullptr;
   mouse_down_may_start_autoscroll_ = false;
   mouse_down_may_start_drag_ = false;
   captures_dragging_ = false;
   is_mouse_position_unknown_ = true;
-  last_known_mouse_position_ = IntPoint();
-  last_known_mouse_global_position_ = IntPoint();
+  last_known_mouse_position_ = FloatPoint();
+  last_known_mouse_global_position_ = FloatPoint();
   mouse_pressed_ = false;
   click_count_ = 0;
   click_element_ = nullptr;
   mouse_down_element_ = nullptr;
   mouse_down_pos_ = IntPoint();
   mouse_down_timestamp_ = TimeTicks();
   mouse_down_ = WebMouseEvent();
   svg_pan_ = false;
   drag_start_pos_ = LayoutPoint();
   fake_mouse_move_event_timer_.Stop();
@@ skipping 454 matching lines @@
 
   frame_->GetEventHandler().GetSelectionController().SetMouseDownMayStartSelect(
       false);
 }
 
 bool MouseEventManager::IsMousePositionUnknown() {
   return is_mouse_position_unknown_;
 }
 
 IntPoint MouseEventManager::LastKnownMousePosition() {
-  return last_known_mouse_position_;
+  return FlooredIntPoint(last_known_mouse_position_);
+}
+
+FloatPoint MouseEventManager::LastKnownMousePositionGlobal() {
+  return last_known_mouse_global_position_;
 }
 
 void MouseEventManager::SetLastKnownMousePosition(const WebMouseEvent& event) {
   is_mouse_position_unknown_ = false;
-  last_known_mouse_position_ = FlooredIntPoint(event.PositionInRootFrame());
-  last_known_mouse_global_position_ =
-      IntPoint(event.PositionInScreen().x, event.PositionInScreen().y);
+  last_known_mouse_position_ = event.PositionInRootFrame();
+  last_known_mouse_global_position_ = event.PositionInScreen();
 }
 
 void MouseEventManager::DispatchFakeMouseMoveEventSoon() {
   if (mouse_pressed_)
     return;
 
   if (is_mouse_position_unknown_)
     return;
 
   // Reschedule the timer, to prevent dispatching mouse move events
@@ skipping 73 matching lines @@
       (mouse_press_node_ && mouse_press_node_->GetLayoutBox() &&
        mouse_press_node_->GetLayoutBox()->CanBeProgramaticallyScrolled());
 
   return swallow_event ? WebInputEventResult::kHandledSystem
                        : WebInputEventResult::kNotHandled;
 }
 
 WebInputEventResult MouseEventManager::HandleMouseReleaseEvent(
     const MouseEventWithHitTestResults& event) {
   AutoscrollController* controller = scroll_manager_->GetAutoscrollController();
-  if (controller && controller->AutoscrollInProgress())
+  if (controller && controller->SelectionAutoscrollInProgress())
     scroll_manager_->StopAutoscroll();
 
   return frame_->GetEventHandler()
                  .GetSelectionController()
                  .HandleMouseReleaseEvent(event, drag_start_pos_)
              ? WebInputEventResult::kHandledSystem
              : WebInputEventResult::kNotHandled;
 }
 
 void MouseEventManager::UpdateSelectionForMouseDrag() {
   frame_->GetEventHandler()
       .GetSelectionController()
       .UpdateSelectionForMouseDrag(mouse_press_node_, drag_start_pos_,
-                                   last_known_mouse_position_);
+                                   FlooredIntPoint(last_known_mouse_position_));
 }
 
 bool MouseEventManager::HandleDragDropIfPossible(
     const GestureEventWithHitTestResults& targeted_event) {
   if (frame_->GetSettings() &&
       frame_->GetSettings()->GetTouchDragDropEnabled() && frame_->View()) {
     const WebGestureEvent& gesture_event = targeted_event.Event();
     unsigned modifiers = gesture_event.GetModifiers();
 
     // TODO(mustaq): Suppressing long-tap MouseEvents could break
@@ skipping 78 matching lines @@
 
     layout_object = parent->GetLayoutObject();
     if (!layout_object || !layout_object->IsListBox())
       return WebInputEventResult::kNotHandled;
   }
 
   mouse_down_may_start_drag_ = false;
 
   frame_->GetEventHandler().GetSelectionController().HandleMouseDraggedEvent(
       event, mouse_down_pos_, drag_start_pos_, mouse_press_node_.Get(),
-      last_known_mouse_position_);
+      FlooredIntPoint(last_known_mouse_position_));
 
   // The call into HandleMouseDraggedEvent may have caused a re-layout,
   // so get the LayoutObject again.
   layout_object = target_node->GetLayoutObject();
 
   if (layout_object && mouse_down_may_start_autoscroll_ &&
       !scroll_manager_->MiddleClickAutoscrollInProgress() &&
       !frame_->Selection().SelectedHTMLForClipboard().IsEmpty()) {
     if (AutoscrollController* controller =
             scroll_manager_->GetAutoscrollController()) {
@@ skipping 292 matching lines @@
 
 void MouseEventManager::SetClickCount(int click_count) {
   click_count_ = click_count;
 }
 
 bool MouseEventManager::MouseDownMayStartDrag() {
   return mouse_down_may_start_drag_;
 }
 
 }  // namespace blink