[Reland] Refactor the selection code in EventHandler

Source/core/editing/SelectionController.h

 /*
- * Copyright (C) 2008 Apple Inc. All Rights Reserved.
+ * Copyright (C) 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved.
+ * Copyright (C) 2015 Google 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
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
  */
 
-#ifndef DOMTimer_h
-#define DOMTimer_h
+#ifndef SelectionController_h
+#define SelectionController_h
 
-#include "bindings/core/v8/ScheduledAction.h"
 #include "core/CoreExport.h"
-#include "core/frame/SuspendableTimer.h"
-#include "platform/UserGestureIndicator.h"
+#include "core/editing/TextGranularity.h"
+#include "core/page/EventWithHitTestResults.h"
 #include "platform/heap/Handle.h"
-#include "wtf/OwnPtr.h"
-#include "wtf/PassOwnPtr.h"
-#include "wtf/RefPtr.h"
 
 namespace blink {
 
-class ExecutionContext;
+class FrameSelection;
+class HitTestResult;
+class LocalFrame;
+class VisibleSelection;
 
-class CORE_EXPORT DOMTimer final : public RefCountedWillBeGarbageCollectedFinalized<DOMTimer>, public SuspendableTimer {
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DOMTimer);
+class SelectionController final : public NoBaseWillBeGarbageCollected<SelectionController> {
+    WTF_MAKE_NONCOPYABLE(SelectionController);
 public:
-    // Creates a new timer owned by the ExecutionContext, starts it and returns its ID.
-    static int install(ExecutionContext*, PassOwnPtrWillBeRawPtr<ScheduledAction>, int timeout, bool singleShot);
-    static void removeByID(ExecutionContext*, int timeoutID);
+    static PassOwnPtrWillBeRawPtr<SelectionController> create(LocalFrame&);
+    DECLARE_TRACE();
 
-    virtual ~DOMTimer();
+    bool updateSelectionForMouseDownDispatchingSelectStart(Node*, const VisibleSelection&, TextGranularity);
+    void handleMousePressEvent(const MouseEventWithHitTestResults&);
+    bool handleMousePressEventSingleClick(const MouseEventWithHitTestResults&);
+    bool handleMousePressEventDoubleClick(const MouseEventWithHitTestResults&);
+    bool handleMousePressEventTripleClick(const MouseEventWithHitTestResults&);
+    void handleMouseDraggedEvent(const MouseEventWithHitTestResults&, const IntPoint&, const LayoutPoint&, Node*, const IntPoint&);
+    bool handleMouseReleaseEvent(const MouseEventWithHitTestResults&, const LayoutPoint&);
+    bool handlePasteGlobalSelection(const PlatformMouseEvent&);
+    bool handleGestureLongPress(const PlatformGestureEvent&, const HitTestResult&);
 
-    // ActiveDOMObject
-    virtual void stop() override;
+    void updateSelectionForMouseDrag(Node*, const LayoutPoint&, const IntPoint&);
+    void updateSelectionForMouseDrag(const HitTestResult&, Node*, const LayoutPoint&, const IntPoint&);
+    void sendContextMenuEvent(const MouseEventWithHitTestResults&, const LayoutPoint&);
+    void passMousePressEventToSubframe(const MouseEventWithHitTestResults&);
 
-    // The following are essentially constants. All intervals are in seconds.
-    static double hiddenPageAlignmentInterval();
-    static double visiblePageAlignmentInterval();
-
-    // Eager finalization is needed to promptly stop this Timer object.
-    // Otherwise timer events might fire at an object that's slated for destruction
-    // (when lazily swept), but some of its members (m_action) may already have
-    // been finalized & must not be accessed.
-    EAGERLY_FINALIZE();
-    DECLARE_VIRTUAL_TRACE();
-
-    void disposeTimer();
+    void initializeSelectionState();
+    void setMouseDownMayStartSelect(bool);
+    bool mouseDownMayStartSelect() const;
+    bool mouseDownWasSingleClickInSelection() const;
 
 private:
-    friend class DOMTimerCoordinator; // For create().
+    explicit SelectionController(LocalFrame&);
 
-    static PassRefPtrWillBeRawPtr<DOMTimer> create(ExecutionContext* context, PassOwnPtrWillBeRawPtr<ScheduledAction> action, int timeout, bool singleShot, int timeoutID)
-    {
-        return adoptRefWillBeNoop(new DOMTimer(context, action, timeout, singleShot, timeoutID));
-    }
+    enum AppendTrailingWhitespace { ShouldAppendTrailingWhitespace, DontAppendTrailingWhitespace };
+    void selectClosestWordFromHitTestResult(const HitTestResult&, AppendTrailingWhitespace);
+    void selectClosestMisspellingFromHitTestResult(const HitTestResult&, AppendTrailingWhitespace);
+    void selectClosestWordFromMouseEvent(const MouseEventWithHitTestResults&);
+    void selectClosestMisspellingFromMouseEvent(const MouseEventWithHitTestResults&);
+    void selectClosestWordOrLinkFromMouseEvent(const MouseEventWithHitTestResults&);
 
-    DOMTimer(ExecutionContext*, PassOwnPtrWillBeRawPtr<ScheduledAction>, int interval, bool singleShot, int timeoutID);
-    virtual void fired() override;
 
-    // Retuns timer fire time rounded to the next multiple of timer alignment interval.
-    virtual double alignedFireTime(double) const override;
-
-    int m_timeoutID;
-    int m_nestingLevel;
-    OwnPtrWillBeMember<ScheduledAction> m_action;
-    RefPtr<UserGestureToken> m_userGestureToken;
+    RawPtrWillBeMember<LocalFrame> const m_frame;
+    bool m_mouseDownMayStartSelect;
+    bool m_mouseDownWasSingleClickInSelection;
+    enum SelectionInitiationState { HaveNotStartedSelection, PlacedCaret, ExtendedSelection };
+    SelectionInitiationState m_selectionInitiationState;
 };
 
 } // namespace blink
-
-#endif // DOMTimer_h
+#endif // SelectionController_h