Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 428 insertions, 0 deletions

diff --git a/Source/WebCore/page/EventHandler.h b/Source/WebCore/page/EventHandler.h
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+/*
+ * 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
+ *    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 EventHandler_h
+#define EventHandler_h
+
+#include "DragActions.h"
+#include "DragState.h"
+#include "FocusDirection.h"
+#include "HitTestRequest.h"
+#include "PlatformMouseEvent.h"
+#include "ScrollTypes.h"
+#include "TextEventInputType.h"
+#include "TextGranularity.h"
+#include "Timer.h"
+#include <wtf/Forward.h>
+#include <wtf/OwnPtr.h>
+#include <wtf/RefPtr.h>
+
+#if PLATFORM(MAC) && !defined(__OBJC__)
+class NSView;
+#endif
+
+#if ENABLE(TOUCH_EVENTS)
+#include <wtf/HashMap.h>
+#endif
+
+namespace WebCore {
+
+class Clipboard;
+class Event;
+class EventTarget;
+class FloatPoint;
+class FloatQuad;
+class Frame;
+class HTMLFrameSetElement;
+class HitTestRequest;
+class HitTestResult;
+class KeyboardEvent;
+class MouseEventWithHitTestResults;
+class Node;
+class OptionalCursor;
+class PlatformKeyboardEvent;
+class PlatformTouchEvent;
+class PlatformWheelEvent;
+class RenderLayer;
+class RenderObject;
+class RenderWidget;
+class SVGElementInstance;
+class Scrollbar;
+class TextEvent;
+class TouchEvent;
+class VisibleSelection;
+class WheelEvent;
+class Widget;
+
+#if ENABLE(GESTURE_EVENTS)
+class PlatformGestureEvent;
+#endif
+
+#if ENABLE(DRAG_SUPPORT)
+extern const int LinkDragHysteresis;
+extern const int ImageDragHysteresis;
+extern const int TextDragHysteresis;
+extern const int GeneralDragHysteresis;
+#endif // ENABLE(DRAG_SUPPORT)
+
+enum HitTestScrollbars { ShouldHitTestScrollbars, DontHitTestScrollbars };
+
+class EventHandler {
+    WTF_MAKE_NONCOPYABLE(EventHandler);
+public:
+    EventHandler(Frame*);
+    ~EventHandler();
+
+    void clear();
+    void nodeWillBeRemoved(Node*);
+
+#if ENABLE(DRAG_SUPPORT)
+    void updateSelectionForMouseDrag();
+#endif
+
+    Node* mousePressNode() const;
+    void setMousePressNode(PassRefPtr<Node>);
+
+    void startPanScrolling(RenderObject*);
+
+    void stopAutoscrollTimer(bool rendererIsBeingDestroyed = false);
+    RenderObject* autoscrollRenderer() const;
+    void updateAutoscrollRenderer();
+
+    void dispatchFakeMouseMoveEventSoon();
+    void dispatchFakeMouseMoveEventSoonInQuad(const FloatQuad&);
+
+    HitTestResult hitTestResultAtPoint(const LayoutPoint&, bool allowShadowContent, bool ignoreClipping = false,
+                                       HitTestScrollbars scrollbars = DontHitTestScrollbars,
+                                       HitTestRequest::HitTestRequestType hitType = HitTestRequest::ReadOnly | HitTestRequest::Active,
+                                       const LayoutSize& padding = LayoutSize());
+
+    bool mousePressed() const { return m_mousePressed; }
+    void setMousePressed(bool pressed) { m_mousePressed = pressed; }
+
+    void setCapturingMouseEventsNode(PassRefPtr<Node>); // A caller is responsible for resetting capturing node to 0.
+
+#if ENABLE(DRAG_SUPPORT)
+    bool updateDragAndDrop(const PlatformMouseEvent&, Clipboard*);
+    void cancelDragAndDrop(const PlatformMouseEvent&, Clipboard*);
+    void performDragAndDrop(const PlatformMouseEvent&, Clipboard*);
+#endif
+
+    void scheduleHoverStateUpdate();
+
+    void setResizingFrameSet(HTMLFrameSetElement*);
+
+    void resizeLayerDestroyed();
+
+    IntPoint currentMousePosition() const;
+
+    static Frame* subframeForTargetNode(Node*);
+    static Frame* subframeForHitTestResult(const MouseEventWithHitTestResults&);
+
+    bool scrollOverflow(ScrollDirection, ScrollGranularity, Node* startingNode = 0);
+    bool scrollRecursively(ScrollDirection, ScrollGranularity, Node* startingNode = 0);
+    bool logicalScrollRecursively(ScrollLogicalDirection, ScrollGranularity, Node* startingNode = 0);
+
+    bool tabsToLinks(KeyboardEvent*) const;
+    bool tabsToAllFormControls(KeyboardEvent*) const;
+
+    bool mouseMoved(const PlatformMouseEvent&, bool onlyUpdateScrollbars = false);
+
+    void lostMouseCapture();
+
+    bool handleMousePressEvent(const PlatformMouseEvent&);
+    bool handleMouseMoveEvent(const PlatformMouseEvent&, HitTestResult* hoveredNode = 0, bool onlyUpdateScrollbars = false);
+    bool handleMouseReleaseEvent(const PlatformMouseEvent&);
+    bool handleWheelEvent(const PlatformWheelEvent&);
+    void defaultWheelEventHandler(Node*, WheelEvent*);
+
+#if ENABLE(GESTURE_EVENTS)
+    bool handleGestureEvent(const PlatformGestureEvent&);
+#endif
+
+#if ENABLE(CONTEXT_MENUS)
+    bool sendContextMenuEvent(const PlatformMouseEvent&);
+    bool sendContextMenuEventForKey();
+#endif
+
+    void setMouseDownMayStartAutoscroll() { m_mouseDownMayStartAutoscroll = true; }
+
+    bool needsKeyboardEventDisambiguationQuirks() const;
+
+    static unsigned accessKeyModifiers();
+    bool handleAccessKey(const PlatformKeyboardEvent&);
+    bool keyEvent(const PlatformKeyboardEvent&);
+    void defaultKeyboardEventHandler(KeyboardEvent*);
+
+    bool handleTextInputEvent(const String& text, Event* underlyingEvent = 0, TextEventInputType = TextEventInputKeyboard);
+    void defaultTextInputEventHandler(TextEvent*);
+
+#if ENABLE(DRAG_SUPPORT)
+    bool eventMayStartDrag(const PlatformMouseEvent&) const;
+    
+    void dragSourceEndedAt(const PlatformMouseEvent&, DragOperation);
+#endif
+
+    void focusDocumentView();
+
+    void capsLockStateMayHaveChanged(); // Only called by FrameSelection
+    
+    void sendResizeEvent(); // Only called in FrameView
+    void sendScrollEvent(); // Ditto
+
+#if PLATFORM(MAC) && defined(__OBJC__)
+    void mouseDown(NSEvent *);
+    void mouseDragged(NSEvent *);
+    void mouseUp(NSEvent *);
+    void mouseMoved(NSEvent *);
+    bool keyEvent(NSEvent *);
+    bool wheelEvent(NSEvent *);
+
+    void sendFakeEventsAfterWidgetTracking(NSEvent *initiatingEvent);
+
+    void setActivationEventNumber(int num) { m_activationEventNumber = num; }
+
+    static NSEvent *currentNSEvent();
+#endif
+
+#if ENABLE(TOUCH_EVENTS)
+    bool handleTouchEvent(const PlatformTouchEvent&);
+#endif
+
+private:
+#if ENABLE(DRAG_SUPPORT)
+    static DragState& dragState();
+    static const double TextDragDelay;
+    
+    PassRefPtr<Clipboard> createDraggingClipboard() const;
+#endif // ENABLE(DRAG_SUPPORT)
+
+    bool eventActivatedView(const PlatformMouseEvent&) const;
+    bool updateSelectionForMouseDownDispatchingSelectStart(Node*, const VisibleSelection&, TextGranularity);
+    void selectClosestWordFromMouseEvent(const MouseEventWithHitTestResults&);
+    void selectClosestWordOrLinkFromMouseEvent(const MouseEventWithHitTestResults&);
+
+    bool handleMouseDoubleClickEvent(const PlatformMouseEvent&);
+
+    static Node* targetNode(const MouseEventWithHitTestResults&);
+    static Node* targetNode(const HitTestResult&);
+
+    bool handleMousePressEvent(const MouseEventWithHitTestResults&);
+    bool handleMousePressEventSingleClick(const MouseEventWithHitTestResults&);
+    bool handleMousePressEventDoubleClick(const MouseEventWithHitTestResults&);
+    bool handleMousePressEventTripleClick(const MouseEventWithHitTestResults&);
+#if ENABLE(DRAG_SUPPORT)
+    bool handleMouseDraggedEvent(const MouseEventWithHitTestResults&);
+#endif
+    bool handleMouseReleaseEvent(const MouseEventWithHitTestResults&);
+
+    OptionalCursor selectCursor(const MouseEventWithHitTestResults&, Scrollbar*);
+#if ENABLE(PAN_SCROLLING)
+    void updatePanScrollState();
+#endif
+
+    void hoverTimerFired(Timer<EventHandler>*);
+
+    void handleAutoscroll(RenderObject*);
+    void startAutoscrollTimer();
+    void setAutoscrollRenderer(RenderObject*);
+    void autoscrollTimerFired(Timer<EventHandler>*);
+    bool logicalScrollOverflow(ScrollLogicalDirection, ScrollGranularity, Node* startingNode = 0);
+    
+    bool shouldTurnVerticalTicksIntoHorizontal(const HitTestResult&) const;
+    bool mouseDownMayStartSelect() const { return m_mouseDownMayStartSelect; }
+
+    static bool isKeyboardOptionTab(KeyboardEvent*);
+    static bool eventInvertsTabsToLinksClientCallResult(KeyboardEvent*);
+
+    void fakeMouseMoveEventTimerFired(Timer<EventHandler>*);
+    void cancelFakeMouseMoveEvent();
+
+    void invalidateClick();
+
+    Node* nodeUnderMouse() const;
+    
+    void updateMouseEventTargetNode(Node*, const PlatformMouseEvent&, bool fireMouseOverOut);
+    void fireMouseOverOut(bool fireMouseOver = true, bool fireMouseOut = true, bool updateLastNodeUnderMouse = true);
+    
+    MouseEventWithHitTestResults prepareMouseEvent(const HitTestRequest&, const PlatformMouseEvent&);
+
+    bool dispatchMouseEvent(const AtomicString& eventType, Node* target, bool cancelable, int clickCount, const PlatformMouseEvent&, bool setUnder);
+#if ENABLE(DRAG_SUPPORT)
+    bool dispatchDragEvent(const AtomicString& eventType, Node* target, const PlatformMouseEvent&, Clipboard*);
+
+    void freeClipboard();
+
+    bool handleDrag(const MouseEventWithHitTestResults&);
+#endif
+    bool handleMouseUp(const MouseEventWithHitTestResults&);
+#if ENABLE(DRAG_SUPPORT)
+    void clearDragState();
+
+    bool dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent&);
+
+    bool dragHysteresisExceeded(const FloatPoint&) const;
+    bool dragHysteresisExceeded(const IntPoint&) const;
+#endif // ENABLE(DRAG_SUPPORT)
+
+    bool passMousePressEventToSubframe(MouseEventWithHitTestResults&, Frame* subframe);
+    bool passMouseMoveEventToSubframe(MouseEventWithHitTestResults&, Frame* subframe, HitTestResult* hoveredNode = 0);
+    bool passMouseReleaseEventToSubframe(MouseEventWithHitTestResults&, Frame* subframe);
+
+    bool passSubframeEventToSubframe(MouseEventWithHitTestResults&, Frame* subframe, HitTestResult* hoveredNode = 0);
+
+    bool passMousePressEventToScrollbar(MouseEventWithHitTestResults&, Scrollbar*);
+
+    bool passWidgetMouseDownEventToWidget(const MouseEventWithHitTestResults&);
+    bool passWidgetMouseDownEventToWidget(RenderWidget*);
+
+    bool passMouseDownEventToWidget(Widget*);
+    bool passWheelEventToWidget(const PlatformWheelEvent&, Widget*);
+
+    void defaultSpaceEventHandler(KeyboardEvent*);
+    void defaultBackspaceEventHandler(KeyboardEvent*);
+    void defaultTabEventHandler(KeyboardEvent*);
+    void defaultArrowEventHandler(FocusDirection, KeyboardEvent*);
+
+#if ENABLE(DRAG_SUPPORT)
+    DragSourceAction updateDragSourceActionsAllowed() const;
+#endif
+
+    // The following are called at the beginning of handleMouseUp and handleDrag.  
+    // If they return true it indicates that they have consumed the event.
+    bool eventLoopHandleMouseUp(const MouseEventWithHitTestResults&);
+#if ENABLE(DRAG_SUPPORT)
+    bool eventLoopHandleMouseDragged(const MouseEventWithHitTestResults&);
+#endif
+
+#if ENABLE(DRAG_SUPPORT)
+    void updateSelectionForMouseDrag(const HitTestResult&);
+#endif
+
+    void updateLastScrollbarUnderMouse(Scrollbar*, bool);
+    
+    void setFrameWasScrolledByUser();
+
+    bool capturesDragging() const { return m_capturesDragging; }
+
+#if PLATFORM(MAC) && defined(__OBJC__)
+    NSView *mouseDownViewIfStillGood();
+
+    PlatformMouseEvent currentPlatformMouseEvent() const;
+#endif
+
+#if ENABLE(FULLSCREEN_API)
+    bool isKeyEventAllowedInFullScreen(const PlatformKeyboardEvent&) const;
+#endif
+
+    Frame* m_frame;
+
+    bool m_mousePressed;
+    bool m_capturesDragging;
+    RefPtr<Node> m_mousePressNode;
+
+    bool m_mouseDownMayStartSelect;
+#if ENABLE(DRAG_SUPPORT)
+    bool m_mouseDownMayStartDrag;
+    bool m_dragMayStartSelectionInstead;
+#endif
+    bool m_mouseDownWasSingleClickInSelection;
+    enum SelectionInitiationState { HaveNotStartedSelection, PlacedCaret, ExtendedSelection };
+    SelectionInitiationState m_selectionInitiationState;
+
+#if ENABLE(DRAG_SUPPORT)
+    LayoutPoint m_dragStartPos;
+#endif
+
+    IntPoint m_panScrollStartPos;
+    bool m_panScrollInProgress;
+
+    bool m_panScrollButtonPressed;
+    bool m_springLoadedPanScrollInProgress;
+
+    Timer<EventHandler> m_hoverTimer;
+    
+    Timer<EventHandler> m_autoscrollTimer;
+    RenderObject* m_autoscrollRenderer;
+    bool m_autoscrollInProgress;
+    bool m_mouseDownMayStartAutoscroll;
+    bool m_mouseDownWasInSubframe;
+
+    Timer<EventHandler> m_fakeMouseMoveEventTimer;
+
+#if ENABLE(SVG)
+    bool m_svgPan;
+    RefPtr<SVGElementInstance> m_instanceUnderMouse;
+    RefPtr<SVGElementInstance> m_lastInstanceUnderMouse;
+#endif
+
+    RenderLayer* m_resizeLayer;
+
+    RefPtr<Node> m_capturingMouseEventsNode;
+    bool m_eventHandlerWillResetCapturingMouseEventsNode;
+    
+    RefPtr<Node> m_nodeUnderMouse;
+    RefPtr<Node> m_lastNodeUnderMouse;
+    RefPtr<Frame> m_lastMouseMoveEventSubframe;
+    RefPtr<Scrollbar> m_lastScrollbarUnderMouse;
+
+    int m_clickCount;
+    RefPtr<Node> m_clickNode;
+
+#if ENABLE(DRAG_SUPPORT)
+    RefPtr<Node> m_dragTarget;
+    bool m_shouldOnlyFireDragOverEvent;
+#endif
+    
+    RefPtr<HTMLFrameSetElement> m_frameSetBeingResized;
+
+    LayoutSize m_offsetFromResizeCorner; // In the coords of m_resizeLayer.
+    
+    IntPoint m_currentMousePosition;
+    IntPoint m_mouseDownPos; // In our view's coords.
+    double m_mouseDownTimestamp;
+    PlatformMouseEvent m_mouseDown;
+
+    bool m_useLatchedWheelEventNode;
+    RefPtr<Node> m_latchedWheelEventNode;
+    bool m_widgetIsLatched;
+
+    RefPtr<Node> m_previousWheelScrolledNode;
+
+#if PLATFORM(MAC)
+    NSView *m_mouseDownView;
+    bool m_sendingEventToSubview;
+    int m_activationEventNumber;
+#endif
+#if ENABLE(TOUCH_EVENTS)
+    typedef HashMap<int, RefPtr<EventTarget> > TouchTargetMap;
+    TouchTargetMap m_originatingTouchPointTargets;
+    bool m_touchPressed;
+#endif
+};
+
+} // namespace WebCore
+
+#endif // EventHandler_h