Extract more of the mouse logic from EventHandler

third_party/WebKit/Source/core/input/EventHandler.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 22 matching lines @@
 #include "core/input/MouseEventManager.h"
 #include "core/input/PointerEventManager.h"
 #include "core/input/ScrollManager.h"
 #include "core/layout/HitTestRequest.h"
 #include "core/page/DragActions.h"
 #include "core/page/EventWithHitTestResults.h"
 #include "core/style/ComputedStyleConstants.h"
 #include "platform/Cursor.h"
 #include "platform/PlatformMouseEvent.h"
 #include "platform/PlatformTouchPoint.h"
-#include "platform/Timer.h"
 #include "platform/UserGestureIndicator.h"
 #include "platform/geometry/LayoutPoint.h"
 #include "platform/heap/Handle.h"
 #include "platform/scroll/ScrollTypes.h"
 #include "public/platform/WebInputEvent.h"
 #include "public/platform/WebInputEventResult.h"
 #include "wtf/Forward.h"
 #include "wtf/HashMap.h"
 #include "wtf/HashTraits.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class DataTransfer;
 class PaintLayer;
 class Document;
-class DragState;
 class Element;
 class Event;
 class EventTarget;
 template <typename EventType>
 class EventWithHitTestResults;
 class FloatPoint;
 class FloatQuad;
 class FrameHost;
 class HTMLFrameSetElement;
 class HitTestRequest;
 class HitTestResult;
 class LayoutObject;
 class LocalFrame;
 class Node;
 class OptionalCursor;
 class PlatformGestureEvent;
 class PlatformTouchEvent;
 class PlatformWheelEvent;
 class ScrollableArea;
 class Scrollbar;
 class SelectionController;
 class TextEvent;
 class WheelEvent;
 class Widget;
 
-enum class DragInitiator;
-
 class CORE_EXPORT EventHandler final
     : public GarbageCollectedFinalized<EventHandler> {
   WTF_MAKE_NONCOPYABLE(EventHandler);
 
  public:
   explicit EventHandler(LocalFrame*);
-  ~EventHandler();
   DECLARE_TRACE();
 
   void clear();
   void nodeWillBeRemoved(Node&);
 
   void updateSelectionForMouseDrag();
   void startMiddleClickAutoscroll(LayoutObject*);
 
   // TODO(nzolghadr): Some of the APIs in this class only forward the action
   // to the corresponding Manager class. We need to investigate whether it is
   // better to expose the manager instance itself later or can the access to
   // those APIs be more limited or removed.
 
   void stopAutoscroll();
 
   void dispatchFakeMouseMoveEventSoon();
   void dispatchFakeMouseMoveEventSoonInQuad(const FloatQuad&);
 
   HitTestResult hitTestResultAtPoint(
       const LayoutPoint&,
       HitTestRequest::HitTestRequestType hitType = HitTestRequest::ReadOnly |
                                                    HitTestRequest::Active,
       const LayoutSize& padding = LayoutSize());
 
-  bool mousePressed() const { return m_mousePressed; }
+  bool mousePressed() const { return m_mouseEventManager->mousePressed(); }
 
   void setCapturingMouseEventsNode(
       Node*);  // A caller is responsible for resetting capturing node to 0.
 
   WebInputEventResult updateDragAndDrop(const PlatformMouseEvent&,
                                         DataTransfer*);
   void cancelDragAndDrop(const PlatformMouseEvent&, DataTransfer*);
   WebInputEventResult performDragAndDrop(const PlatformMouseEvent&,
                                          DataTransfer*);
   void updateDragStateAfterEditDragIfNeeded(Element* rootEditableElement);
@@ skipping 71 matching lines @@
   // Returns whether pointerId is active or not
   bool isPointerEventActive(int);
 
   void setPointerCapture(int, EventTarget*);
   void releasePointerCapture(int, EventTarget*);
   bool hasPointerCapture(int, const EventTarget*) const;
   bool hasProcessedPointerCapture(int, const EventTarget*) const;
 
   void elementRemoved(EventTarget*);
 
-  void setMouseDownMayStartAutoscroll() {
-    m_mouseDownMayStartAutoscroll = true;
-  }
+  void setMouseDownMayStartAutoscroll();
 
   bool handleAccessKey(const WebKeyboardEvent&);
   WebInputEventResult keyEvent(const WebKeyboardEvent&);
   void defaultKeyboardEventHandler(KeyboardEvent*);
 
   bool handleTextInputEvent(const String& text,
                             Event* underlyingEvent = nullptr,
                             TextEventInputType = TextEventInputKeyboard);
   void defaultTextInputEventHandler(TextEvent*);
 
   void dragSourceEndedAt(const PlatformMouseEvent&, DragOperation);
 
-  void focusDocumentView();
-
   void capsLockStateMayHaveChanged();  // Only called by FrameSelection
 
   WebInputEventResult handleTouchEvent(const PlatformTouchEvent&);
 
   bool useHandCursor(Node*, bool isOverLink);
 
   void notifyElementActivated();
 
   PassRefPtr<UserGestureToken> takeLastMouseDownGestureToken() {
     return m_lastMouseDownUserGestureToken.release();
@@ skipping 14 matching lines @@
   //             a physical direction for each LayoutBox we try to scroll
   //             based on that box's writing mode.
   // granularity - The units that the  scroll delta parameter is in.
   // startNode - Optional. If provided, start chaining from the given node.
   //             If not, use the current focus or last clicked node.
   bool logicalScroll(ScrollDirection,
                      ScrollGranularity,
                      Node* startNode = nullptr);
 
  private:
-  static DragState& dragState();
-
-  DataTransfer* createDraggingDataTransfer() const;
 
   WebInputEventResult handleMouseMoveOrLeaveEvent(
       const PlatformMouseEvent&,
       HitTestResult* hoveredNode = nullptr,
       bool onlyUpdateScrollbars = false,
       bool forceLeave = false);
-  WebInputEventResult handleMousePressEvent(
-      const MouseEventWithHitTestResults&);
-  WebInputEventResult handleMouseFocus(
-      const HitTestResult&,
-      InputDeviceCapabilities* sourceCapabilities);
-  WebInputEventResult handleMouseDraggedEvent(
-      const MouseEventWithHitTestResults&);
-  WebInputEventResult handleMouseReleaseEvent(
-      const MouseEventWithHitTestResults&);
 
   HitTestRequest::HitTestRequestType getHitTypeForGestureType(
       PlatformEvent::EventType);
   void applyTouchAdjustment(PlatformGestureEvent*, HitTestResult*);
   WebInputEventResult handleGestureTapDown(
       const GestureEventWithHitTestResults&);
   WebInputEventResult handleGestureTap(const GestureEventWithHitTestResults&);
   WebInputEventResult handleGestureLongPress(
       const GestureEventWithHitTestResults&);
   WebInputEventResult handleGestureLongTap(
       const GestureEventWithHitTestResults&);
 
   void updateGestureTargetNodeForMouseEvent(
       const GestureEventWithHitTestResults&);
 
   bool shouldApplyTouchAdjustment(const PlatformGestureEvent&) const;
 
   OptionalCursor selectCursor(const HitTestResult&);
   OptionalCursor selectAutoCursor(const HitTestResult&,
                                   Node*,
                                   const Cursor& iBeam);
 
   void hoverTimerFired(TimerBase*);
   void cursorUpdateTimerFired(TimerBase*);
   void activeIntervalTimerFired(TimerBase*);
 
-  void fakeMouseMoveEventTimerFired(TimerBase*);
-  void cancelFakeMouseMoveEvent();
-  bool isCursorVisible() const;
   void updateCursor();
 
   ScrollableArea* associatedScrollableArea(const PaintLayer*) const;
 
-  void invalidateClick();
-
-  Node* updateMouseEventTargetNode(Node*, const PlatformMouseEvent&);
-  void updateMouseEventTargetNodeAndSendEvents(
-      Node*,
-      const PlatformMouseEvent&,
-      bool isFrameBoundaryTransition = false);
-
-  MouseEventWithHitTestResults prepareMouseEvent(const HitTestRequest&,
-                                                 const PlatformMouseEvent&);
-
-  WebInputEventResult dispatchMouseEvent(const AtomicString& eventType,
-                                         Node* target,
-                                         int clickCount,
-                                         const PlatformMouseEvent&);
+  Node* updateMouseEventTargetNode(Node*);
 
   // Dispatches ME after corresponding PE provided the PE has not been canceled. The eventType arg
   // must be a mouse event that can be gated though a preventDefaulted pointerdown (i.e., one of
   // {mousedown, mousemove, mouseup}).
   // TODO(mustaq): Can we avoid the clickCount param, instead use PlatformMouseEvent's count?
   //     Same applied to dispatchMouseEvent() above.
   WebInputEventResult updatePointerTargetAndDispatchEvents(
       const AtomicString& mouseEventType,
       Node* target,
-      int clickCount,
       const PlatformMouseEvent&);
 
-  WebInputEventResult dispatchDragEvent(const AtomicString& eventType,
-                                        Node* target,
-                                        const PlatformMouseEvent&,
-                                        DataTransfer*);
-
-  void clearDragDataTransfer();
-
-  bool handleDrag(const MouseEventWithHitTestResults&, DragInitiator);
-  bool tryStartDrag(const MouseEventWithHitTestResults&);
-
   // Clears drag target and related states. It is called when drag is done or canceled.
   void clearDragState();
 
-  // Resets the state that indicates the next events could cause a drag. It is called when
-  // we realize the next events should not cause drag based on the drag heuristics.
-  void clearDragHeuristicState();
-
-  WebInputEventResult dispatchDragSrcEvent(const AtomicString& eventType,
-                                           const PlatformMouseEvent&);
-
-  bool dragHysteresisExceeded(const IntPoint&) const;
-
   WebInputEventResult passMousePressEventToSubframe(
       MouseEventWithHitTestResults&,
       LocalFrame* subframe);
   WebInputEventResult passMouseMoveEventToSubframe(
       MouseEventWithHitTestResults&,
       LocalFrame* subframe,
       HitTestResult* hoveredNode = nullptr);
   WebInputEventResult passMouseReleaseEventToSubframe(
       MouseEventWithHitTestResults&,
       LocalFrame* subframe);
 
   bool passMousePressEventToScrollbar(MouseEventWithHitTestResults&);
 
   void defaultSpaceEventHandler(KeyboardEvent*);
   void defaultBackspaceEventHandler(KeyboardEvent*);
   void defaultTabEventHandler(KeyboardEvent*);
   void defaultEscapeEventHandler(KeyboardEvent*);
   void defaultArrowEventHandler(WebFocusType, KeyboardEvent*);
 
   void updateLastScrollbarUnderMouse(Scrollbar*, bool);
 
-  bool capturesDragging() const { return m_capturesDragging; }
-
   WebInputEventResult handleGestureShowPress();
 
-  void setLastKnownMousePosition(const PlatformMouseEvent&);
-
-  void setClickNode(Node*);
-  bool handleDragDropIfPossible(const GestureEventWithHitTestResults&);
-  static ContainerNode* parentForClickEvent(const Node&);
-
   bool shouldTopControlsConsumeScroll(FloatSize) const;
 
-  // If the given element is a shadow host and its root has delegatesFocus=false flag,
-  // slide focus to its inner element. Returns true if the resulting focus is different from
-  // the given element.
-  bool slideFocusOnShadowHostIfNecessary(const Element&);
-
   FrameHost* frameHost() const;
 
   // NOTE: If adding a new field to this class please ensure that it is
   // cleared in |EventHandler::clear()|.
 
   const Member<LocalFrame> m_frame;
 
-  // Current button-press state for mouse/mouse-like-stylus.
-  // TODO(crbug.com/563676): Buggy for chorded buttons.
-  bool m_mousePressed;
-
-  bool m_capturesDragging;
-  Member<Node> m_mousePressNode;
-
-  bool m_mouseDownMayStartDrag;
   const Member<SelectionController> m_selectionController;
 
-  LayoutPoint m_dragStartPos;
-
   Timer<EventHandler> m_hoverTimer;
 
   // TODO(rbyers): Mouse cursor update is page-wide, not per-frame.  Page-wide state
   // should move out of EventHandler to a new PageEventHandler class. crbug.com/449649
   Timer<EventHandler> m_cursorUpdateTimer;
 
-  bool m_mouseDownMayStartAutoscroll;
-
-  Timer<EventHandler> m_fakeMouseMoveEventTimer;
-
-  bool m_svgPan;
-
   Member<Node> m_capturingMouseEventsNode;
   bool m_eventHandlerWillResetCapturingMouseEventsNode;
 
-  // TODO(nzolghadr): Refactor the mouse related fields to MouseEventManager.
-  // Note the difference of this and m_nodeUnderPointer in PointerEventManager
-  Member<Node> m_nodeUnderMouse;
-
   Member<LocalFrame> m_lastMouseMoveEventSubframe;
   Member<Scrollbar> m_lastScrollbarUnderMouse;
 
-  int m_clickCount;
-  Member<Node> m_clickNode;
-
   Member<Node> m_dragTarget;
   bool m_shouldOnlyFireDragOverEvent;
 
   Member<HTMLFrameSetElement> m_frameSetBeingResized;
 
-  bool m_mousePositionIsUnknown;
-  // The last mouse movement position this frame has seen in root frame coordinates.
-  IntPoint m_lastKnownMousePosition;
-  IntPoint m_lastKnownMouseGlobalPosition;
-  IntPoint m_mouseDownPos;  // In our view's coords.
-  double m_mouseDownTimestamp;
-  PlatformMouseEvent m_mouseDown;
   RefPtr<UserGestureToken> m_lastMouseDownUserGestureToken;
 
   Member<ScrollManager> m_scrollManager;
   Member<MouseEventManager> m_mouseEventManager;
   Member<KeyboardEventManager> m_keyboardEventManager;
   Member<PointerEventManager> m_pointerEventManager;
   Member<GestureManager> m_gestureManager;
 
   double m_maxMouseMovedDuration;
 
   bool m_longTapShouldInvokeContextMenu;
 
   Timer<EventHandler> m_activeIntervalTimer;
   double m_lastShowPressTimestamp;
   Member<Element> m_lastDeferredTapElement;
 
   // Set on GestureTapDown if the |pointerdown| event corresponding to the
   // triggering |touchstart| event was canceled. This suppresses mouse event
   // firing for the current gesture sequence (i.e. until next GestureTapDown).
   bool m_suppressMouseEventsFromGestures;
 
-  // TODO(nzolghadr): Temporary until further refactoring
-  friend GestureManager;
 };
 
 }  // namespace blink
 
 #endif  // EventHandler_h