Source/core/editing/SelectionController.cpp - Issue 1113323002: [Reland] Refactor the selection code in EventHandler

Unified Diff: Source/core/editing/SelectionController.cpp

Issue 1113323002: [Reland] Refactor the selection code in EventHandler (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master

Patch Set: Created 5 years, 6 months ago

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Index: Source/core/editing/SelectionController.cpp

diff --git a/Source/core/input/EventHandler.cpp b/Source/core/editing/SelectionController.cpp

similarity index 11%

copy from Source/core/input/EventHandler.cpp

copy to Source/core/editing/SelectionController.cpp

index 2385b4e685d715befd987ef797187d68381080ab..18329836d7d0265f5b9795889823e648cdcf7e80 100644

--- a/Source/core/input/EventHandler.cpp

+++ b/Source/core/editing/SelectionController.cpp

@@ -2,6 +2,7 @@

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

@@ -26,320 +27,42 @@

#include "config.h"

-#include "core/input/EventHandler.h"

+#include "core/editing/SelectionController.h"

-#include "bindings/core/v8/ExceptionStatePlaceholder.h"

#include "core/HTMLNames.h"

-#include "core/InputTypeNames.h"

-#include "core/clipboard/DataObject.h"

-#include "core/clipboard/DataTransfer.h"

#include "core/dom/Document.h"

#include "core/dom/DocumentMarkerController.h"

-#include "core/dom/TouchList.h"

-#include "core/dom/shadow/ComposedTreeTraversal.h"

-#include "core/dom/shadow/ShadowRoot.h"

#include "core/editing/Editor.h"

#include "core/editing/FrameSelection.h"

#include "core/editing/htmlediting.h"

#include "core/editing/iterators/TextIterator.h"

-#include "core/events/EventPath.h"

-#include "core/events/KeyboardEvent.h"

-#include "core/events/MouseEvent.h"

-#include "core/events/TextEvent.h"

-#include "core/events/TouchEvent.h"

-#include "core/events/WheelEvent.h"

-#include "core/fetch/ImageResource.h"

-#include "core/frame/EventHandlerRegistry.h"

-#include "core/frame/FrameHost.h"

+#include "core/events/Event.h"

#include "core/frame/FrameView.h"

#include "core/frame/LocalFrame.h"

-#include "core/frame/PinchViewport.h"

#include "core/frame/Settings.h"

-#include "core/html/HTMLDialogElement.h"

-#include "core/html/HTMLFrameElementBase.h"

-#include "core/html/HTMLFrameSetElement.h"

-#include "core/html/HTMLInputElement.h"

-#include "core/layout/HitTestRequest.h"

-#include "core/layout/HitTestResult.h"

-#include "core/layout/LayoutPart.h"

-#include "core/layout/LayoutTextControlSingleLine.h"

#include "core/layout/LayoutView.h"

-#include "core/loader/FrameLoader.h"

-#include "core/loader/FrameLoaderClient.h"

-#include "core/page/AutoscrollController.h"

-#include "core/page/ChromeClient.h"

-#include "core/page/DragController.h"

-#include "core/page/DragState.h"

#include "core/page/FocusController.h"

-#include "core/page/FrameTree.h"

#include "core/page/Page.h"

-#include "core/page/SpatialNavigation.h"

-#include "core/page/TouchAdjustment.h"

-#include "core/page/scrolling/ScrollState.h"

-#include "core/paint/DeprecatedPaintLayer.h"

-#include "core/style/ComputedStyle.h"

-#include "core/svg/SVGDocumentExtensions.h"

-#include "platform/PlatformGestureEvent.h"

-#include "platform/PlatformKeyboardEvent.h"

-#include "platform/PlatformTouchEvent.h"

-#include "platform/PlatformWheelEvent.h"

#include "platform/RuntimeEnabledFeatures.h"

-#include "platform/TraceEvent.h"

-#include "platform/WindowsKeyboardCodes.h"

-#include "platform/geometry/FloatPoint.h"

-#include "platform/graphics/Image.h"

-#include "platform/heap/Handle.h"

-#include "platform/scroll/ScrollAnimator.h"

-#include "platform/scroll/Scrollbar.h"

-#include "wtf/Assertions.h"

-#include "wtf/CurrentTime.h"

-#include "wtf/StdLibExtras.h"

-#include "wtf/TemporaryChange.h"

namespace blink {

-using namespace HTMLNames;

-// The link drag hysteresis is much larger than the others because there

-// needs to be enough space to cancel the link press without starting a link drag,

-// and because dragging links is rare.

-static const int LinkDragHysteresis = 40;

-static const int ImageDragHysteresis = 5;

-static const int TextDragHysteresis = 3;

-static const int GeneralDragHysteresis = 3;

-// The amount of time to wait before sending a fake mouse event, triggered

-// during a scroll. The short interval is used if the content responds to the mouse events quickly enough,

-// otherwise the long interval is used.

-static const double fakeMouseMoveShortInterval = 0.1;

-static const double fakeMouseMoveLongInterval = 0.250;

-// The amount of time to wait for a cursor update on style and layout changes

-// Set to 50Hz, no need to be faster than common screen refresh rate

-static const double cursorUpdateInterval = 0.02;

-static const int maximumCursorSize = 128;

-// It's pretty unlikely that a scale of less than one would ever be used. But all we really

-// need to ensure here is that the scale isn't so small that integer overflow can occur when

-// dividing cursor sizes (limited above) by the scale.

-static const double minimumCursorScale = 0.001;

-// The minimum amount of time an element stays active after a ShowPress

-// This is roughly 9 frames, which should be long enough to be noticeable.

-static const double minimumActiveInterval = 0.15;

-#if OS(MACOSX)

-static const double TextDragDelay = 0.15;

-#else

-static const double TextDragDelay = 0.0;

-#endif

-enum NoCursorChangeType { NoCursorChange };

-enum class DragInitiator { Mouse, Touch };

-class OptionalCursor {

-public:

- OptionalCursor(NoCursorChangeType) : m_isCursorChange(false) { }

- OptionalCursor(const Cursor& cursor) : m_isCursorChange(true), m_cursor(cursor) { }

- bool isCursorChange() const { return m_isCursorChange; }

- const Cursor& cursor() const { ASSERT(m_isCursorChange); return m_cursor; }

-private:

- bool m_isCursorChange;

- Cursor m_cursor;

-};

-class MaximumDurationTracker {

-public:

- explicit MaximumDurationTracker(double *maxDuration)

- : m_maxDuration(maxDuration)

- , m_start(monotonicallyIncreasingTime())

- {

- }

- ~MaximumDurationTracker()

- {

- *m_maxDuration = max(*m_maxDuration, monotonicallyIncreasingTime() - m_start);

- }

-private:

- double* m_maxDuration;

- double m_start;

-};

-static inline ScrollGranularity wheelGranularityToScrollGranularity(WheelEvent* event)

- unsigned deltaMode = event->deltaMode();

- if (deltaMode == WheelEvent::DOM_DELTA_PAGE)

- return ScrollByPage;

- if (deltaMode == WheelEvent::DOM_DELTA_LINE)

- return ScrollByLine;

- ASSERT(deltaMode == WheelEvent::DOM_DELTA_PIXEL);

- return event->hasPreciseScrollingDeltas() ? ScrollByPrecisePixel : ScrollByPixel;

-// Refetch the event target node if it is removed or currently is the shadow node inside an <input> element.

-// If a mouse event handler changes the input element type to one that has a widget associated,

-// we'd like to EventHandler::handleMousePressEvent to pass the event to the widget and thus the

-// event target node can't still be the shadow node.

-static inline bool shouldRefetchEventTarget(const MouseEventWithHitTestResults& mev)

- Node* targetNode = mev.innerNode();

- if (!targetNode || !targetNode->parentNode())

- return true;

- return targetNode->isShadowRoot() && isHTMLInputElement(*toShadowRoot(targetNode)->host());

-void recomputeScrollChain(const LocalFrame& frame, const Node& startNode,

- WillBeHeapDeque<RefPtrWillBeMember<Element>>& scrollChain)

+PassOwnPtrWillBeRawPtr<SelectionController> SelectionController::create(LocalFrame& frame)

{

- scrollChain.clear();

- ASSERT(startNode.layoutObject());

- LayoutBox* curBox = startNode.layoutObject()->enclosingBox();

- // Scrolling propagates along the containing block chain.

- while (curBox && !curBox->isLayoutView()) {

- Node* curNode = curBox->node();

- // FIXME: this should reject more elements, as part of crbug.com/410974.

- if (curNode && curNode->isElementNode())

- scrollChain.prepend(toElement(curNode));

- curBox = curBox->containingBlock();

- }

- // FIXME: we should exclude the document in some cases, as part

- // of crbug.com/410974.

- scrollChain.prepend(frame.document()->documentElement());

+ return adoptPtrWillBeNoop(new SelectionController(frame));

}

-EventHandler::EventHandler(LocalFrame* frame)

- : m_frame(frame)

- , m_mousePressed(false)

- , m_capturesDragging(false)

+SelectionController::SelectionController(LocalFrame& frame)

+ : m_frame(&frame)

, m_mouseDownMayStartSelect(false)

- , m_mouseDownMayStartDrag(false)

, m_mouseDownWasSingleClickInSelection(false)

, m_selectionInitiationState(HaveNotStartedSelection)

- , m_hoverTimer(this, &EventHandler::hoverTimerFired)

- , m_cursorUpdateTimer(this, &EventHandler::cursorUpdateTimerFired)

- , m_mouseDownMayStartAutoscroll(false)

- , m_fakeMouseMoveEventTimer(this, &EventHandler::fakeMouseMoveEventTimerFired)

- , m_svgPan(false)

- , m_resizeScrollableArea(nullptr)

- , m_eventHandlerWillResetCapturingMouseEventsNode(0)

- , m_clickCount(0)

- , m_shouldOnlyFireDragOverEvent(false)

- , m_mousePositionIsUnknown(true)

- , m_mouseDownTimestamp(0)

- , m_widgetIsLatched(false)

- , m_touchPressed(false)

- , m_scrollGestureHandlingNode(nullptr)

- , m_lastGestureScrollOverWidget(false)

- , m_maxMouseMovedDuration(0)

- , m_longTapShouldInvokeContextMenu(false)

- , m_activeIntervalTimer(this, &EventHandler::activeIntervalTimerFired)

- , m_lastShowPressTimestamp(0)

- , m_deltaConsumedForScrollSequence(false)

-EventHandler::~EventHandler()

- ASSERT(!m_fakeMouseMoveEventTimer.isActive());

-DEFINE_TRACE(EventHandler)

-#if ENABLE(OILPAN)

- visitor->trace(m_mousePressNode);

- visitor->trace(m_capturingMouseEventsNode);

- visitor->trace(m_nodeUnderMouse);

- visitor->trace(m_lastNodeUnderMouse);

- visitor->trace(m_lastMouseMoveEventSubframe);

- visitor->trace(m_lastScrollbarUnderMouse);

- visitor->trace(m_clickNode);

- visitor->trace(m_dragTarget);

- visitor->trace(m_frameSetBeingResized);

- visitor->trace(m_latchedWheelEventNode);

- visitor->trace(m_previousWheelScrolledNode);

- visitor->trace(m_scrollbarHandlingScrollGesture);

- visitor->trace(m_targetForTouchID);

- visitor->trace(m_touchSequenceDocument);

- visitor->trace(m_scrollGestureHandlingNode);

- visitor->trace(m_previousGestureScrolledNode);

- visitor->trace(m_lastDeferredTapElement);

- visitor->trace(m_currentScrollChain);

-#endif

-DragState& EventHandler::dragState()

- DEFINE_STATIC_LOCAL(Persistent<DragState>, state, (new DragState()));

- return *state;

-void EventHandler::clear()

{

- m_hoverTimer.stop();

- m_cursorUpdateTimer.stop();

- m_fakeMouseMoveEventTimer.stop();

- m_activeIntervalTimer.stop();

- m_resizeScrollableArea = nullptr;

- m_nodeUnderMouse = nullptr;

- m_lastNodeUnderMouse = nullptr;

- m_lastMouseMoveEventSubframe = nullptr;

- m_lastScrollbarUnderMouse = nullptr;

- m_clickCount = 0;

- m_clickNode = nullptr;

- m_frameSetBeingResized = nullptr;

- m_dragTarget = nullptr;

- m_shouldOnlyFireDragOverEvent = false;

- m_mousePositionIsUnknown = true;

- m_lastKnownMousePosition = IntPoint();

- m_lastKnownMouseGlobalPosition = IntPoint();

- m_lastMouseDownUserGestureToken.clear();

- m_mousePressNode = nullptr;

- m_mousePressed = false;

- m_capturesDragging = false;

- m_capturingMouseEventsNode = nullptr;

- m_latchedWheelEventNode = nullptr;

- m_previousWheelScrolledNode = nullptr;

- m_targetForTouchID.clear();

- m_touchSequenceDocument.clear();

- m_touchSequenceUserGestureToken.clear();

- m_scrollGestureHandlingNode = nullptr;

- m_lastGestureScrollOverWidget = false;

- m_previousGestureScrolledNode = nullptr;

- m_scrollbarHandlingScrollGesture = nullptr;

- m_maxMouseMovedDuration = 0;

- m_touchPressed = false;

- m_mouseDownMayStartSelect = false;

- m_mouseDownMayStartDrag = false;

- m_lastShowPressTimestamp = 0;

- m_lastDeferredTapElement = nullptr;

- m_eventHandlerWillResetCapturingMouseEventsNode = false;

- m_mouseDownWasSingleClickInSelection = false;

- m_selectionInitiationState = HaveNotStartedSelection;

- m_mouseDownMayStartAutoscroll = false;

- m_svgPan = false;

- m_mouseDownPos = IntPoint();

- m_mouseDownTimestamp = 0;

- m_longTapShouldInvokeContextMenu = false;

- m_dragStartPos = LayoutPoint();

- m_offsetFromResizeCorner = LayoutSize();

- m_mouseDown = PlatformMouseEvent();

}

-void EventHandler::nodeWillBeRemoved(Node& nodeToBeRemoved)

+DEFINE_TRACE(SelectionController)

{

- if (nodeToBeRemoved.containsIncludingShadowDOM(m_clickNode.get())) {

- // We don't dispatch click events if the mousedown node is removed

- // before a mouseup event. It is compatible with IE and Firefox.

- m_clickNode = nullptr;

- }

+ visitor->trace(m_frame);

}

static void setSelectionIfNeeded(FrameSelection& selection, const VisibleSelection& newSelection)

@@ -369,7 +92,7 @@ static VisibleSelection expandSelectionToRespectUserSelectAll(Node* targetNode,

return newSelection;

}

-bool EventHandler::updateSelectionForMouseDownDispatchingSelectStart(Node* targetNode, const VisibleSelection& selection, TextGranularity granularity)

+bool SelectionController::updateSelectionForMouseDownDispatchingSelectStart(Node* targetNode, const VisibleSelection& selection, TextGranularity granularity)

{

if (Position::nodeIsUserSelectNone(targetNode))

return false;

@@ -389,7 +112,7 @@ bool EventHandler::updateSelectionForMouseDownDispatchingSelectStart(Node* targe

return true;

}

-void EventHandler::selectClosestWordFromHitTestResult(const HitTestResult& result, AppendTrailingWhitespace appendTrailingWhitespace)

+void SelectionController::selectClosestWordFromHitTestResult(const HitTestResult& result, AppendTrailingWhitespace appendTrailingWhitespace)

{

Node* innerNode = result.innerNode();

VisibleSelection newSelection;

@@ -408,7 +131,7 @@ void EventHandler::selectClosestWordFromHitTestResult(const HitTestResult& resul

}

-void EventHandler::selectClosestMisspellingFromHitTestResult(const HitTestResult& result, AppendTrailingWhitespace appendTrailingWhitespace)

+void SelectionController::selectClosestMisspellingFromHitTestResult(const HitTestResult& result, AppendTrailingWhitespace appendTrailingWhitespace)

{

Node* innerNode = result.innerNode();

VisibleSelection newSelection;

@@ -433,7 +156,7 @@ void EventHandler::selectClosestMisspellingFromHitTestResult(const HitTestResult

}

-void EventHandler::selectClosestWordFromMouseEvent(const MouseEventWithHitTestResults& result)

+void SelectionController::selectClosestWordFromMouseEvent(const MouseEventWithHitTestResults& result)

{

if (m_mouseDownMayStartSelect) {

selectClosestWordFromHitTestResult(result.hitTestResult(),

@@ -441,7 +164,7 @@ void EventHandler::selectClosestWordFromMouseEvent(const MouseEventWithHitTestRe

}

-void EventHandler::selectClosestMisspellingFromMouseEvent(const MouseEventWithHitTestResults& result)

+void SelectionController::selectClosestMisspellingFromMouseEvent(const MouseEventWithHitTestResults& result)

{

if (m_mouseDownMayStartSelect) {

selectClosestMisspellingFromHitTestResult(result.hitTestResult(),

@@ -449,7 +172,7 @@ void EventHandler::selectClosestMisspellingFromMouseEvent(const MouseEventWithHi

}

-void EventHandler::selectClosestWordOrLinkFromMouseEvent(const MouseEventWithHitTestResults& result)

+void SelectionController::selectClosestWordOrLinkFromMouseEvent(const MouseEventWithHitTestResults& result)

{

if (!result.hitTestResult().isLiveLink())

return selectClosestWordFromMouseEvent(result);

@@ -467,9 +190,9 @@ void EventHandler::selectClosestWordOrLinkFromMouseEvent(const MouseEventWithHit

}

-bool EventHandler::handleMousePressEventDoubleClick(const MouseEventWithHitTestResults& event)

+bool SelectionController::handleMousePressEventDoubleClick(const MouseEventWithHitTestResults& event)

{

- TRACE_EVENT0("blink", "EventHandler::handleMousePressEventDoubleClick");

+ TRACE_EVENT0("blink", "SelectionController::handleMousePressEventDoubleClick");

if (event.event().button() != LeftButton)

return false;

@@ -487,9 +210,9 @@ bool EventHandler::handleMousePressEventDoubleClick(const MouseEventWithHitTestR

return true;

}

-bool EventHandler::handleMousePressEventTripleClick(const MouseEventWithHitTestResults& event)

+bool SelectionController::handleMousePressEventTripleClick(const MouseEventWithHitTestResults& event)

{

- TRACE_EVENT0("blink", "EventHandler::handleMousePressEventTripleClick");

+ TRACE_EVENT0("blink", "SelectionController::handleMousePressEventTripleClick");

if (event.event().button() != LeftButton)

return false;

@@ -514,9 +237,9 @@ static int textDistance(const Position& start, const Position& end)

return TextIterator::rangeLength(range->startPosition(), range->endPosition(), true);

}

-bool EventHandler::handleMousePressEventSingleClick(const MouseEventWithHitTestResults& event)

+bool SelectionController::handleMousePressEventSingleClick(const MouseEventWithHitTestResults& event)

{

- TRACE_EVENT0("blink", "EventHandler::handleMousePressEventSingleClick");

+ TRACE_EVENT0("blink", "SelectionController::handleMousePressEventSingleClick");

m_frame->document()->updateLayoutIgnorePendingStylesheets();

Node* innerNode = event.innerNode();

@@ -594,132 +317,27 @@ static inline bool canMouseDownStartSelect(Node* node)

return true;

}

-bool EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& event)

+void SelectionController::handleMousePressEvent(const MouseEventWithHitTestResults& event)

{

- TRACE_EVENT0("blink", "EventHandler::handleMousePressEvent");

- // Reset drag state.

- dragState().m_dragSrc = nullptr;

- cancelFakeMouseMoveEvent();

- m_frame->document()->updateLayoutIgnorePendingStylesheets();

- if (FrameView* frameView = m_frame->view()) {

- if (frameView->isPointInScrollbarCorner(event.event().position()))

- return false;

- }

- bool singleClick = event.event().clickCount() <= 1;

// If we got the event back, that must mean it wasn't prevented,

// so it's allowed to start a drag or selection if it wasn't in a scrollbar.

m_mouseDownMayStartSelect = canMouseDownStartSelect(event.innerNode()) && !event.scrollbar();

- m_mouseDownMayStartDrag = singleClick;

m_mouseDownWasSingleClickInSelection = false;

- m_mouseDown = event.event();

- if (m_frame->document()->isSVGDocument() && m_frame->document()->accessSVGExtensions().zoomAndPanEnabled()) {

- if (event.event().shiftKey() && singleClick) {

- m_svgPan = true;

- m_frame->document()->accessSVGExtensions().startPan(m_frame->view()->rootFrameToContents(event.event().position()));

- return true;

- }

- // We don't do this at the start of mouse down handling,

- // because we don't want to do it until we know we didn't hit a widget.

- if (singleClick)

- focusDocumentView();

- Node* innerNode = event.innerNode();

- m_mousePressNode = innerNode;

- m_dragStartPos = event.event().position();

- bool swallowEvent = false;

- m_mousePressed = true;

- m_selectionInitiationState = HaveNotStartedSelection;

- if (event.event().clickCount() == 2)

- swallowEvent = handleMousePressEventDoubleClick(event);

- else if (event.event().clickCount() >= 3)

- swallowEvent = handleMousePressEventTripleClick(event);

- else

- swallowEvent = handleMousePressEventSingleClick(event);

- m_mouseDownMayStartAutoscroll = m_mouseDownMayStartSelect

- || (m_mousePressNode && m_mousePressNode->layoutBox() && m_mousePressNode->layoutBox()->canBeProgramaticallyScrolled());

- return swallowEvent;

}

-bool EventHandler::handleMouseDraggedEvent(const MouseEventWithHitTestResults& event)

+void SelectionController::handleMouseDraggedEvent(const MouseEventWithHitTestResults& event, const IntPoint& mouseDownPos, const LayoutPoint& dragStartPos, Node* mousePressNode, const IntPoint& lastKnownMousePosition)

{

- TRACE_EVENT0("blink", "EventHandler::handleMouseDraggedEvent");

- // While resetting m_mousePressed here may seem out of place, it turns out

- // to be needed to handle some bugs^Wfeatures in Blink mouse event handling:

- // 1. Certain elements, such as <embed>, capture mouse events. They do not

- // bubble back up. One way for a <embed> to start capturing mouse events

- // is on a mouse press. The problem is the <embed> node only starts

- // capturing mouse events *after* m_mousePressed for the containing frame

- // has already been set to true. As a result, the frame's EventHandler

- // never sees the mouse release event, which is supposed to reset

- // m_mousePressed... so m_mousePressed ends up remaining true until the

- // event handler finally gets another mouse released event. Oops.

- // 2. Dragging doesn't start until after a mouse press event, but a drag

- // that ends as a result of a mouse release does not send a mouse release

- // event. As a result, m_mousePressed also ends up remaining true until

- // the next mouse release event seen by the EventHandler.

- if (event.event().button() != LeftButton)

- m_mousePressed = false;

- if (!m_mousePressed)

- return false;

- if (handleDrag(event, DragInitiator::Mouse))

- return true;

- Node* targetNode = event.innerNode();

- if (!targetNode)

- return false;

- LayoutObject* layoutObject = targetNode->layoutObject();

- if (!layoutObject) {

- Node* parent = ComposedTreeTraversal::parent(*targetNode);

- if (!parent)

- return false;

- layoutObject = parent->layoutObject();

- if (!layoutObject || !layoutObject->isListBox())

- return false;

- }

- m_mouseDownMayStartDrag = false;

- if (m_mouseDownMayStartAutoscroll && !panScrollInProgress()) {

- if (AutoscrollController* controller = autoscrollController()) {

- controller->startAutoscrollForSelection(layoutObject);

- m_mouseDownMayStartAutoscroll = false;

- }

if (m_selectionInitiationState != ExtendedSelection) {

HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);

- HitTestResult result(request, m_mouseDownPos);

+ HitTestResult result(request, mouseDownPos);

m_frame->document()->layoutView()->hitTest(result);

- updateSelectionForMouseDrag(result);

+ updateSelectionForMouseDrag(result, mousePressNode, dragStartPos, lastKnownMousePosition);

}

- updateSelectionForMouseDrag(event.hitTestResult());

- return true;

+ updateSelectionForMouseDrag(event.hitTestResult(), mousePressNode, dragStartPos, lastKnownMousePosition);

}

-void EventHandler::updateSelectionForMouseDrag()

+void SelectionController::updateSelectionForMouseDrag(Node* mousePressNode, const LayoutPoint& dragStartPos, const IntPoint& lastKnownMousePosition)

{

FrameView* view = m_frame->view();

if (!view)

@@ -729,12 +347,12 @@ void EventHandler::updateSelectionForMouseDrag()

return;

HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::Move);

- HitTestResult result(request, view->rootFrameToContents(m_lastKnownMousePosition));

+ HitTestResult result(request, view->rootFrameToContents(lastKnownMousePosition));

layoutObject->hitTest(result);

- updateSelectionForMouseDrag(result);

+ updateSelectionForMouseDrag(result, mousePressNode, dragStartPos, lastKnownMousePosition);

}

-void EventHandler::updateSelectionForMouseDrag(const HitTestResult& hitTestResult)

+void SelectionController::updateSelectionForMouseDrag(const HitTestResult& hitTestResult, Node* mousePressNode, const LayoutPoint& dragStartPos, const IntPoint& lastKnownMousePosition)

{

if (!m_mouseDownMayStartSelect)

return;

@@ -773,19 +391,19 @@ void EventHandler::updateSelectionForMouseDrag(const HitTestResult& hitTestResul

}

if (RuntimeEnabledFeatures::userSelectAllEnabled()) {

- Node* rootUserSelectAllForMousePressNode = Position::rootUserSelectAllForNode(m_mousePressNode.get());

+ Node* rootUserSelectAllForMousePressNode = Position::rootUserSelectAllForNode(mousePressNode);

if (rootUserSelectAllForMousePressNode && rootUserSelectAllForMousePressNode == Position::rootUserSelectAllForNode(target)) {

newSelection.setBase(positionBeforeNode(rootUserSelectAllForMousePressNode).upstream(CanCrossEditingBoundary));

newSelection.setExtent(positionAfterNode(rootUserSelectAllForMousePressNode).downstream(CanCrossEditingBoundary));

} else {

// Reset base for user select all when base is inside user-select-all area and extent < base.

- if (rootUserSelectAllForMousePressNode && comparePositions(target->layoutObject()->positionForPoint(hitTestResult.localPoint()), m_mousePressNode->layoutObject()->positionForPoint(m_dragStartPos)) < 0)

+ if (rootUserSelectAllForMousePressNode && comparePositions(target->layoutObject()->positionForPoint(hitTestResult.localPoint()), mousePressNode->layoutObject()->positionForPoint(dragStartPos)) < 0)

newSelection.setBase(positionAfterNode(rootUserSelectAllForMousePressNode).downstream(CanCrossEditingBoundary));

Node* rootUserSelectAllForTarget = Position::rootUserSelectAllForNode(target);

- if (rootUserSelectAllForTarget && m_mousePressNode->layoutObject() && comparePositions(target->layoutObject()->positionForPoint(hitTestResult.localPoint()), m_mousePressNode->layoutObject()->positionForPoint(m_dragStartPos)) < 0)

+ if (rootUserSelectAllForTarget && mousePressNode->layoutObject() && comparePositions(target->layoutObject()->positionForPoint(hitTestResult.localPoint()), mousePressNode->layoutObject()->positionForPoint(dragStartPos)) < 0)

newSelection.setExtent(positionBeforeNode(rootUserSelectAllForTarget).upstream(CanCrossEditingBoundary));

- else if (rootUserSelectAllForTarget && m_mousePressNode->layoutObject())

+ else if (rootUserSelectAllForTarget && mousePressNode->layoutObject())

newSelection.setExtent(positionAfterNode(rootUserSelectAllForTarget).downstream(CanCrossEditingBoundary));

else

newSelection.setExtent(targetPosition);

@@ -801,28 +419,16 @@ void EventHandler::updateSelectionForMouseDrag(const HitTestResult& hitTestResul

FrameSelection::AdjustEndpointsAtBidiBoundary);

}

-bool EventHandler::handleMouseReleaseEvent(const MouseEventWithHitTestResults& event)

+bool SelectionController::handleMouseReleaseEvent(const MouseEventWithHitTestResults& event, const LayoutPoint& dragStartPos)

{

- AutoscrollController* controller = autoscrollController();

- if (controller && controller->autoscrollInProgress())

- stopAutoscroll();

- // Used to prevent mouseMoveEvent from initiating a drag before

- // the mouse is pressed again.

- m_mousePressed = false;

- m_capturesDragging = false;

- m_mouseDownMayStartDrag = false;

- m_mouseDownMayStartSelect = false;

- m_mouseDownMayStartAutoscroll = false;

bool handled = false;

+ m_mouseDownMayStartSelect = false;

// Clear the selection if the mouse didn't move after the last mouse

// press and it's not a context menu click. We do this so when clicking

// on the selection, the selection goes away. However, if we are

// editing, place the caret.

if (m_mouseDownWasSingleClickInSelection && m_selectionInitiationState != ExtendedSelection

- && m_dragStartPos == event.event().position()

+ && dragStartPos == event.event().position()

&& m_frame->selection().isRange()

&& event.event().button() != RightButton) {

VisibleSelection newSelection;

@@ -850,3306 +456,117 @@ bool EventHandler::handleMouseReleaseEvent(const MouseEventWithHitTestResults& e

return handled;

}

-#if OS(WIN)

-void EventHandler::startPanScrolling(LayoutObject* layoutObject)

+bool SelectionController::handlePasteGlobalSelection(const PlatformMouseEvent& mouseEvent)

{

- if (!layoutObject->isBox())

- return;

- AutoscrollController* controller = autoscrollController();

- if (!controller)

- return;

- controller->startPanScrolling(toLayoutBox(layoutObject), lastKnownMousePosition());

- invalidateClick();

+ // If the event was a middle click, attempt to copy global selection in after

+ // the newly set caret position.

+ //

+ // This code is called from either the mouse up or mouse down handling. There

+ // is some debate about when the global selection is pasted:

+ // xterm: pastes on up.

+ // GTK: pastes on down.

+ // Qt: pastes on up.

+ // Firefox: pastes on up.

+ // Chromium: pastes on up.

+ //

+ // There is something of a webcompat angle to this well, as highlighted by

+ // crbug.com/14608. Pages can clear text boxes 'onclick' and, if we paste on

+ // down then the text is pasted just before the onclick handler runs and

+ // clears the text box. So it's important this happens after the event

+ // handlers have been fired.

+ if (mouseEvent.type() != PlatformEvent::MouseReleased)

+ return false;

-#endif // OS(WIN)

+ if (!m_frame->page())

+ return false;

+ Frame* focusFrame = m_frame->page()->focusController().focusedOrMainFrame();

+ // Do not paste here if the focus was moved somewhere else.

+ if (m_frame == focusFrame && m_frame->editor().behavior().supportsGlobalSelection())

+ return m_frame->editor().command("PasteGlobalSelection").execute();

-AutoscrollController* EventHandler::autoscrollController() const

- if (Page* page = m_frame->page())

- return &page->autoscrollController();

- return nullptr;

+ return false;

}

-bool EventHandler::panScrollInProgress() const

+bool SelectionController::handleGestureLongPress(const PlatformGestureEvent& gestureEvent, const HitTestResult& hitTestResult)

{

- return autoscrollController() && autoscrollController()->panScrollInProgress();

+#if OS(ANDROID)

+ bool shouldLongPressSelectWord = true;

+#else

+ bool shouldLongPressSelectWord = m_frame->settings() && m_frame->settings()->touchEditingEnabled();

+#endif

+ if (shouldLongPressSelectWord) {

-HitTestResult EventHandler::hitTestResultAtPoint(const LayoutPoint& point, HitTestRequest::HitTestRequestType hitType, const LayoutSize& padding)

- TRACE_EVENT0("blink", "EventHandler::hitTestResultAtPoint");

- ASSERT((hitType & HitTestRequest::ListBased) || padding.isEmpty());

+ Node* innerNode = hitTestResult.innerNode();

+ if (!hitTestResult.isLiveLink() && innerNode && (innerNode->isContentEditable() || innerNode->isTextNode()

+#if OS(ANDROID)

+ || innerNode->canStartSelection()

+#endif

+ )) {

+ selectClosestWordFromHitTestResult(hitTestResult, DontAppendTrailingWhitespace);

+ if (m_frame->selection().isRange()) {

+ Page* page = m_frame->page();

tkent 2015/06/10 00:14:12 nit: I prefer removing these three lines, and call

Miyoung Shin(g) 2015/06/10 00:59:17 Done.

+ if (page)

+ page->focusController().focusDocumentView(m_frame);

- // We always send hitTestResultAtPoint to the main frame if we have one,

- // otherwise we might hit areas that are obscured by higher frames.

- if (m_frame->page()) {

- LocalFrame* mainFrame = m_frame->localFrameRoot();

- if (mainFrame && m_frame != mainFrame) {

- FrameView* frameView = m_frame->view();

- FrameView* mainView = mainFrame->view();

- if (frameView && mainView) {

- IntPoint mainFramePoint = mainView->rootFrameToContents(frameView->contentsToRootFrame(roundedIntPoint(point)));

- return mainFrame->eventHandler().hitTestResultAtPoint(mainFramePoint, hitType, padding);

+ return true;

}

- // hitTestResultAtPoint is specifically used to hitTest into all frames, thus it always allows child frame content.

- HitTestRequest request(hitType | HitTestRequest::AllowChildFrameContent);

- HitTestResult result(request, point, padding.height(), padding.width(), padding.height(), padding.width());

- // LayoutView::hitTest causes a layout, and we don't want to hit that until the first

- // layout because until then, there is nothing shown on the screen - the user can't

- // have intentionally clicked on something belonging to this page. Furthermore,

- // mousemove events before the first layout should not lead to a premature layout()

- // happening, which could show a flash of white.

- // See also the similar code in Document::prepareMouseEvent.

- if (!m_frame->contentLayoutObject() || !m_frame->view() || !m_frame->view()->didFirstLayout())

- return result;

- m_frame->contentLayoutObject()->hitTest(result);

- if (!request.readOnly())

- m_frame->document()->updateHoverActiveState(request, result.innerElement());

- return result;

-void EventHandler::stopAutoscroll()

- if (AutoscrollController* controller = autoscrollController())

- controller->stopAutoscroll();

-bool EventHandler::scroll(ScrollDirection direction, ScrollGranularity granularity, Node* startNode, Node** stopNode, float delta, IntPoint absolutePoint)

- if (!delta)

- return false;

- Node* node = startNode;

- if (!node)

- node = m_frame->document()->focusedElement();

- if (!node)

- node = m_mousePressNode.get();

- if (!node || !node->layoutObject())

- return false;

- LayoutBox* curBox = node->layoutObject()->enclosingBox();

- while (curBox && !curBox->isLayoutView()) {

- ScrollDirectionPhysical physicalDirection = toPhysicalDirection(

- direction, curBox->isHorizontalWritingMode(), curBox->style()->isFlippedBlocksWritingMode());

- // If we're at the stopNode, we should try to scroll it but we shouldn't bubble past it

- bool shouldStopBubbling = stopNode && *stopNode && curBox->node() == *stopNode;

- bool didScroll = curBox->scroll(physicalDirection, granularity, delta);

- if (didScroll && stopNode)

- *stopNode = curBox->node();

- if (didScroll || shouldStopBubbling) {

- setFrameWasScrolledByUser();

- return true;

- }

- curBox = curBox->containingBlock();

- }

return false;

}

-void EventHandler::customizedScroll(const Node& startNode, ScrollState& scrollState)

+void SelectionController::sendContextMenuEvent(const MouseEventWithHitTestResults& mev, const LayoutPoint& position)

{

- if (scrollState.fullyConsumed())

- return;

- if (m_currentScrollChain.isEmpty())

- recomputeScrollChain(*m_frame, startNode, m_currentScrollChain);

- scrollState.setScrollChain(m_currentScrollChain);

- scrollState.distributeToScrollChainDescendant();

+ if (!m_frame->selection().contains(position)

+ && !mev.scrollbar()

+ // FIXME: In the editable case, word selection sometimes selects content that isn't underneath the mouse.

+ // If the selection is non-editable, we do word selection to make it easier to use the contextual menu items

+ // available for text selections. But only if we're above text.

+ && (m_frame->selection().isContentEditable() || (mev.innerNode() && mev.innerNode()->isTextNode()))) {

+ m_mouseDownMayStartSelect = true; // context menu events are always allowed to perform a selection

-bool EventHandler::bubblingScroll(ScrollDirection direction, ScrollGranularity granularity, Node* startingNode)

- // The layout needs to be up to date to determine if we can scroll. We may be

- // here because of an onLoad event, in which case the final layout hasn't been performed yet.

- m_frame->document()->updateLayoutIgnorePendingStylesheets();

- // FIXME: enable scroll customization in this case. See crbug.com/410974.

- if (scroll(direction, granularity, startingNode))

- return true;

- LocalFrame* frame = m_frame;

- FrameView* view = frame->view();

- if (view) {

- ScrollDirectionPhysical physicalDirection =

- toPhysicalDirection(direction, view->isVerticalDocument(), view->isFlippedDocument());

- if (view->scrollableArea()->userScroll(physicalDirection, granularity)) {

- setFrameWasScrolledByUser();

- return true;

- }

+ if (mev.hitTestResult().isMisspelled())

+ selectClosestMisspellingFromMouseEvent(mev);

+ else if (m_frame->editor().behavior().shouldSelectOnContextualMenuClick())

+ selectClosestWordOrLinkFromMouseEvent(mev);

}

- Frame* parentFrame = frame->tree().parent();

- if (!parentFrame || !parentFrame->isLocalFrame())

- return false;

- // FIXME: Broken for OOPI.

- return toLocalFrame(parentFrame)->eventHandler().bubblingScroll(direction, granularity, m_frame->deprecatedLocalOwner());

-IntPoint EventHandler::lastKnownMousePosition() const

- return m_lastKnownMousePosition;

-static LocalFrame* subframeForTargetNode(Node* node)

- if (!node)

- return nullptr;

- LayoutObject* layoutObject = node->layoutObject();

- if (!layoutObject || !layoutObject->isLayoutPart())

- return nullptr;

- Widget* widget = toLayoutPart(layoutObject)->widget();

- if (!widget || !widget->isFrameView())

- return nullptr;

- return &toFrameView(widget)->frame();

}

-static LocalFrame* subframeForHitTestResult(const MouseEventWithHitTestResults& hitTestResult)

+void SelectionController::passMousePressEventToSubframe(MouseEventWithHitTestResults& mev)

tkent 2015/06/10 00:14:12 Can you make the argument |const MouseEventWithHit

Miyoung Shin(g) 2015/06/10 00:59:17 Done.

{

- if (!hitTestResult.isOverWidget())

- return nullptr;

- return subframeForTargetNode(hitTestResult.innerNode());

-static bool isSubmitImage(Node* node)

- return isHTMLInputElement(node) && toHTMLInputElement(node)->type() == InputTypeNames::image;

-bool EventHandler::useHandCursor(Node* node, bool isOverLink)

- if (!node)

- return false;

- return ((isOverLink || isSubmitImage(node)) && !node->hasEditableStyle());

-void EventHandler::cursorUpdateTimerFired(Timer<EventHandler>*)

- ASSERT(m_frame);

- ASSERT(m_frame->document());

- updateCursor();

-void EventHandler::updateCursor()

- TRACE_EVENT0("input", "EventHandler::updateCursor");

- // We must do a cross-frame hit test because the frame that triggered the cursor

- // update could be occluded by a different frame.

- ASSERT(m_frame == m_frame->localFrameRoot());

- if (m_mousePositionIsUnknown)

- return;

- FrameView* view = m_frame->view();

- if (!view || !view->shouldSetCursor())

- return;

- LayoutView* layoutView = view->layoutView();

- if (!layoutView)

- return;

- m_frame->document()->updateLayout();

- HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::AllowChildFrameContent);

- HitTestResult result(request, view->rootFrameToContents(m_lastKnownMousePosition));

- layoutView->hitTest(result);

- if (LocalFrame* frame = result.innerNodeFrame()) {

- OptionalCursor optionalCursor = frame->eventHandler().selectCursor(result);

- if (optionalCursor.isCursorChange()) {

- view->setCursor(optionalCursor.cursor());

- }

+ // If we're clicking into a frame that is selected, the frame will appear

+ // greyed out even though we're clicking on the selection. This looks

+ // really strange (having the whole frame be greyed out), so we deselect the

+ // selection.

+ IntPoint p = m_frame->view()->rootFrameToContents(mev.event().position());

+ if (m_frame->selection().contains(p)) {

+ VisiblePosition visiblePos(

+ mev.innerNode()->layoutObject()->positionForPoint(mev.localPoint()));

+ VisibleSelection newSelection(visiblePos);

+ m_frame->selection().setSelection(newSelection);

}

-OptionalCursor EventHandler::selectCursor(const HitTestResult& result)

+void SelectionController::initializeSelectionState()

{

- if (m_resizeScrollableArea && m_resizeScrollableArea->inResizeMode())

- return NoCursorChange;

- Page* page = m_frame->page();

- if (!page)

- return NoCursorChange;

- if (panScrollInProgress())

- return NoCursorChange;

- Node* node = result.innerPossiblyPseudoNode();

- if (!node)

- return selectAutoCursor(result, node, iBeamCursor());

- LayoutObject* layoutObject = node->layoutObject();

- const ComputedStyle* style = layoutObject ? layoutObject->style() : nullptr;

- if (layoutObject) {

- Cursor overrideCursor;

- switch (layoutObject->getCursor(roundedIntPoint(result.localPoint()), overrideCursor)) {

- case SetCursorBasedOnStyle:

- break;

- case SetCursor:

- return overrideCursor;

- case DoNotSetCursor:

- return NoCursorChange;

- }

- if (style && style->cursors()) {

- const CursorList* cursors = style->cursors();

- for (unsigned i = 0; i < cursors->size(); ++i) {

- StyleImage* styleImage = (*cursors)[i].image();

- if (!styleImage)

- continue;

- ImageResource* cachedImage = styleImage->cachedImage();

- if (!cachedImage)

- continue;

- float scale = styleImage->imageScaleFactor();

- bool hotSpotSpecified = (*cursors)[i].hotSpotSpecified();

- // Get hotspot and convert from logical pixels to physical pixels.

- IntPoint hotSpot = (*cursors)[i].hotSpot();

- hotSpot.scale(scale, scale);

- IntSize size = cachedImage->imageForLayoutObject(layoutObject)->size();

- if (cachedImage->errorOccurred())

- continue;

- // Limit the size of cursors (in UI pixels) so that they cannot be

- // used to cover UI elements in chrome.

- size.scale(1 / scale);

- if (size.width() > maximumCursorSize || size.height() > maximumCursorSize)

- continue;

- Image* image = cachedImage->imageForLayoutObject(layoutObject);

- // Ensure no overflow possible in calculations above.

- if (scale < minimumCursorScale)

- continue;

- return Cursor(image, hotSpotSpecified, hotSpot, scale);

- }

- switch (style ? style->cursor() : CURSOR_AUTO) {

- case CURSOR_AUTO: {

- bool horizontalText = !style || style->isHorizontalWritingMode();

- const Cursor& iBeam = horizontalText ? iBeamCursor() : verticalTextCursor();

- return selectAutoCursor(result, node, iBeam);

- }

- case CURSOR_CROSS:

- return crossCursor();

- case CURSOR_POINTER:

- return handCursor();

- case CURSOR_MOVE:

- return moveCursor();

- case CURSOR_ALL_SCROLL:

- return moveCursor();

- case CURSOR_E_RESIZE:

- return eastResizeCursor();

- case CURSOR_W_RESIZE:

- return westResizeCursor();

- case CURSOR_N_RESIZE:

- return northResizeCursor();

- case CURSOR_S_RESIZE:

- return southResizeCursor();

- case CURSOR_NE_RESIZE:

- return northEastResizeCursor();

- case CURSOR_SW_RESIZE:

- return southWestResizeCursor();

- case CURSOR_NW_RESIZE:

- return northWestResizeCursor();

- case CURSOR_SE_RESIZE:

- return southEastResizeCursor();

- case CURSOR_NS_RESIZE:

- return northSouthResizeCursor();

- case CURSOR_EW_RESIZE:

- return eastWestResizeCursor();

- case CURSOR_NESW_RESIZE:

- return northEastSouthWestResizeCursor();

- case CURSOR_NWSE_RESIZE:

- return northWestSouthEastResizeCursor();

- case CURSOR_COL_RESIZE:

- return columnResizeCursor();

- case CURSOR_ROW_RESIZE:

- return rowResizeCursor();

- case CURSOR_TEXT:

- return iBeamCursor();

- case CURSOR_WAIT:

- return waitCursor();

- case CURSOR_HELP:

- return helpCursor();

- case CURSOR_VERTICAL_TEXT:

- return verticalTextCursor();

- case CURSOR_CELL:

- return cellCursor();

- case CURSOR_CONTEXT_MENU:

- return contextMenuCursor();

- case CURSOR_PROGRESS:

- return progressCursor();

- case CURSOR_NO_DROP:

- return noDropCursor();

- case CURSOR_ALIAS:

- return aliasCursor();

- case CURSOR_COPY:

- return copyCursor();

- case CURSOR_NONE:

- return noneCursor();

- case CURSOR_NOT_ALLOWED:

- return notAllowedCursor();

- case CURSOR_DEFAULT:

- return pointerCursor();

- case CURSOR_ZOOM_IN:

- return zoomInCursor();

- case CURSOR_ZOOM_OUT:

- return zoomOutCursor();

- case CURSOR_WEBKIT_GRAB:

- return grabCursor();

- case CURSOR_WEBKIT_GRABBING:

- return grabbingCursor();

- }

- return pointerCursor();

+ m_selectionInitiationState = HaveNotStartedSelection;

}

-OptionalCursor EventHandler::selectAutoCursor(const HitTestResult& result, Node* node, const Cursor& iBeam)

+void SelectionController::setMouseDownMayStartSelect(bool mayStartSelect)

{

- bool editable = (node && node->hasEditableStyle());

- if (useHandCursor(node, result.isOverLink()))

- return handCursor();

- bool inResizer = false;

- LayoutObject* layoutObject = node ? node->layoutObject() : nullptr;

- if (layoutObject && m_frame->view()) {

- DeprecatedPaintLayer* layer = layoutObject->enclosingLayer();

- inResizer = layer->scrollableArea() && layer->scrollableArea()->isPointInResizeControl(result.roundedPointInMainFrame(), ResizerForPointer);

- }

- // During selection, use an I-beam no matter what we're over.

- // If a drag may be starting or we're capturing mouse events for a particular node, don't treat this as a selection.

- if (m_mousePressed && m_mouseDownMayStartSelect

- && !m_mouseDownMayStartDrag

- && m_frame->selection().isCaretOrRange()

- && !m_capturingMouseEventsNode) {

- return iBeam;

- }

- if ((editable || (layoutObject && layoutObject->isText() && node->canStartSelection())) && !inResizer && !result.scrollbar())

- return iBeam;

- return pointerCursor();

+ m_mouseDownMayStartSelect = mayStartSelect;

}

-static LayoutPoint contentPointFromRootFrame(LocalFrame* frame, const IntPoint& pointInRootFrame)

+bool SelectionController::mouseDownMayStartSelect() const

{

- FrameView* view = frame->view();

- // FIXME: Is it really OK to use the wrong coordinates here when view is 0?

- // Historically the code would just crash; this is clearly no worse than that.

- return view ? view->rootFrameToContents(pointInRootFrame) : pointInRootFrame;

+ return m_mouseDownMayStartSelect;

}

-bool EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent)

+bool SelectionController::mouseDownWasSingleClickInSelection() const

{

- TRACE_EVENT0("blink", "EventHandler::handleMousePressEvent");

- RefPtrWillBeRawPtr<FrameView> protector(m_frame->view());

- UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);

- m_frame->localFrameRoot()->eventHandler().m_lastMouseDownUserGestureToken = gestureIndicator.currentToken();

- cancelFakeMouseMoveEvent();

- if (m_eventHandlerWillResetCapturingMouseEventsNode)

- m_capturingMouseEventsNode = nullptr;

- m_mousePressed = true;

- m_capturesDragging = true;

- setLastKnownMousePosition(mouseEvent);

- m_mouseDownTimestamp = mouseEvent.timestamp();

- m_mouseDownMayStartDrag = false;

- m_mouseDownMayStartSelect = false;

- m_mouseDownMayStartAutoscroll = false;

- if (FrameView* view = m_frame->view()) {

- m_mouseDownPos = view->rootFrameToContents(mouseEvent.position());

- } else {

- invalidateClick();

- return false;

- }

- HitTestRequest request(HitTestRequest::Active);

- // Save the document point we generate in case the window coordinate is invalidated by what happens

- // when we dispatch the event.

- LayoutPoint documentPoint = contentPointFromRootFrame(m_frame, mouseEvent.position());

- MouseEventWithHitTestResults mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);

- if (!mev.innerNode()) {

- invalidateClick();

- return false;

- }

- m_mousePressNode = mev.innerNode();

- RefPtrWillBeRawPtr<LocalFrame> subframe = subframeForHitTestResult(mev);

- if (subframe && passMousePressEventToSubframe(mev, subframe.get())) {

- // Start capturing future events for this frame. We only do this if we didn't clear

- // the m_mousePressed flag, which may happen if an AppKit widget entered a modal event loop.

- m_capturesDragging = subframe->eventHandler().capturesDragging();

- if (m_mousePressed && m_capturesDragging) {

- m_capturingMouseEventsNode = mev.innerNode();

- m_eventHandlerWillResetCapturingMouseEventsNode = true;

- }

- invalidateClick();

- return true;

- }

-#if OS(WIN)

- // We store whether pan scrolling is in progress before calling stopAutoscroll()

- // because it will set m_autoscrollType to NoAutoscroll on return.

- bool isPanScrollInProgress = panScrollInProgress();

- stopAutoscroll();

- if (isPanScrollInProgress) {

- // We invalidate the click when exiting pan scrolling so that we don't inadvertently navigate

- // away from the current page (e.g. the click was on a hyperlink). See <rdar://problem/6095023>.

- invalidateClick();

- return true;

- }

-#endif

- m_clickCount = mouseEvent.clickCount();

- m_clickNode = mev.innerNode()->isTextNode() ? ComposedTreeTraversal::parent(*mev.innerNode()) : mev.innerNode();

- if (FrameView* view = m_frame->view()) {

- DeprecatedPaintLayer* layer = mev.innerNode()->layoutObject() ? mev.innerNode()->layoutObject()->enclosingLayer() : nullptr;

- IntPoint p = view->rootFrameToContents(mouseEvent.position());

- if (layer && layer->scrollableArea() && layer->scrollableArea()->isPointInResizeControl(p, ResizerForPointer)) {

- m_resizeScrollableArea = layer->scrollableArea();

- m_resizeScrollableArea->setInResizeMode(true);

- m_offsetFromResizeCorner = LayoutSize(m_resizeScrollableArea->offsetFromResizeCorner(p));

- invalidateClick();

- return true;

- }

- m_frame->selection().setCaretBlinkingSuspended(true);

- bool swallowEvent = !dispatchMouseEvent(EventTypeNames::mousedown, mev.innerNode(), m_clickCount, mouseEvent, true);

- HitTestResult hitTestResult = hitTestResultInFrame(m_frame, mouseEvent.position(), HitTestRequest::ReadOnly);

- swallowEvent = swallowEvent || handleMouseFocus(MouseEventWithHitTestResults(mouseEvent, hitTestResult));

- m_capturesDragging = !swallowEvent || mev.scrollbar();

- // If the hit testing originally determined the event was in a scrollbar, refetch the MouseEventWithHitTestResults

- // in case the scrollbar widget was destroyed when the mouse event was handled.

- if (mev.scrollbar()) {

- const bool wasLastScrollBar = mev.scrollbar() == m_lastScrollbarUnderMouse.get();

- HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);

- mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);

- if (wasLastScrollBar && mev.scrollbar() != m_lastScrollbarUnderMouse.get())

- m_lastScrollbarUnderMouse = nullptr;

- }

- if (swallowEvent) {

- // scrollbars should get events anyway, even disabled controls might be scrollable

- passMousePressEventToScrollbar(mev);

- } else {

- if (shouldRefetchEventTarget(mev)) {

- HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);

- mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);

- }

- if (passMousePressEventToScrollbar(mev))

- swallowEvent = true;

- else

- swallowEvent = handleMousePressEvent(mev);

- }

- return swallowEvent;

-static DeprecatedPaintLayer* layerForNode(Node* node)

- if (!node)

- return nullptr;

- LayoutObject* layoutObject = node->layoutObject();

- if (!layoutObject)

- return nullptr;

- DeprecatedPaintLayer* layer = layoutObject->enclosingLayer();

- if (!layer)

- return nullptr;

- return layer;

-ScrollableArea* EventHandler::associatedScrollableArea(const DeprecatedPaintLayer* layer) const

- if (DeprecatedPaintLayerScrollableArea* scrollableArea = layer->scrollableArea()) {

- if (scrollableArea->scrollsOverflow())

- return scrollableArea;

- }

- return nullptr;

-bool EventHandler::handleMouseMoveEvent(const PlatformMouseEvent& event)

- TRACE_EVENT0("blink", "EventHandler::handleMouseMoveEvent");

- RefPtrWillBeRawPtr<FrameView> protector(m_frame->view());

- MaximumDurationTracker maxDurationTracker(&m_maxMouseMovedDuration);

- HitTestResult hoveredNode = HitTestResult();

- bool result = handleMouseMoveOrLeaveEvent(event, &hoveredNode);

- Page* page = m_frame->page();

- if (!page)

- return result;

- if (DeprecatedPaintLayer* layer = layerForNode(hoveredNode.innerNode())) {

- if (ScrollableArea* layerScrollableArea = associatedScrollableArea(layer))

- layerScrollableArea->mouseMovedInContentArea();

- }

- if (FrameView* frameView = m_frame->view())

- frameView->mouseMovedInContentArea();

- hoveredNode.setToShadowHostIfInUserAgentShadowRoot();

- page->chromeClient().mouseDidMoveOverElement(hoveredNode);

- return result;

-void EventHandler::handleMouseLeaveEvent(const PlatformMouseEvent& event)

- TRACE_EVENT0("blink", "EventHandler::handleMouseLeaveEvent");

- RefPtrWillBeRawPtr<FrameView> protector(m_frame->view());

- handleMouseMoveOrLeaveEvent(event, 0, false, true);

-bool EventHandler::handleMouseMoveOrLeaveEvent(const PlatformMouseEvent& mouseEvent, HitTestResult* hoveredNode, bool onlyUpdateScrollbars, bool forceLeave)

- ASSERT(m_frame);

- ASSERT(m_frame->view());

- setLastKnownMousePosition(mouseEvent);

- if (m_hoverTimer.isActive())

- m_hoverTimer.stop();

- m_cursorUpdateTimer.stop();

- cancelFakeMouseMoveEvent();

- if (m_svgPan) {

- m_frame->document()->accessSVGExtensions().updatePan(m_frame->view()->rootFrameToContents(m_lastKnownMousePosition));

- return true;

- }

- if (m_frameSetBeingResized)

- return !dispatchMouseEvent(EventTypeNames::mousemove, m_frameSetBeingResized.get(), 0, mouseEvent, false);

- // Send events right to a scrollbar if the mouse is pressed.

- if (m_lastScrollbarUnderMouse && m_mousePressed) {

- m_lastScrollbarUnderMouse->mouseMoved(mouseEvent);

- return true;

- }

- // Mouse events simulated from touch should not hit-test again.

- ASSERT(!mouseEvent.fromTouch());

- HitTestRequest::HitTestRequestType hitType = HitTestRequest::Move;

- if (m_mousePressed) {

- hitType |= HitTestRequest::Active;

- } else if (onlyUpdateScrollbars) {

- // Mouse events should be treated as "read-only" if we're updating only scrollbars. This

- // means that :hover and :active freeze in the state they were in, rather than updating

- // for nodes the mouse moves while the window is not key (which will be the case if

- // onlyUpdateScrollbars is true).

- hitType |= HitTestRequest::ReadOnly;

- }

- // Treat any mouse move events as readonly if the user is currently touching the screen.

- if (m_touchPressed)

- hitType |= HitTestRequest::Active | HitTestRequest::ReadOnly;

- HitTestRequest request(hitType);

- MouseEventWithHitTestResults mev = MouseEventWithHitTestResults(mouseEvent, HitTestResult(request, LayoutPoint()));

- // We don't want to do a hit-test in forceLeave scenarios because there might actually be some other frame above this one at the specified co-ordinate.

- // So we must force the hit-test to fail, while still clearing hover/active state.

- if (forceLeave)

- m_frame->document()->updateHoverActiveState(request, 0);

- else

- mev = prepareMouseEvent(request, mouseEvent);

- if (hoveredNode)

- *hoveredNode = mev.hitTestResult();

- Scrollbar* scrollbar = nullptr;

- if (m_resizeScrollableArea && m_resizeScrollableArea->inResizeMode()) {

- m_resizeScrollableArea->resize(mouseEvent, m_offsetFromResizeCorner);

- } else {

- if (!scrollbar)

- scrollbar = mev.scrollbar();

- updateLastScrollbarUnderMouse(scrollbar, !m_mousePressed);

- if (onlyUpdateScrollbars)

- return true;

- }

- bool swallowEvent = false;

- RefPtrWillBeRawPtr<LocalFrame> newSubframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev);

- // We want mouseouts to happen first, from the inside out. First send a move event to the last subframe so that it will fire mouseouts.

- if (m_lastMouseMoveEventSubframe && m_lastMouseMoveEventSubframe->tree().isDescendantOf(m_frame) && m_lastMouseMoveEventSubframe != newSubframe)

- m_lastMouseMoveEventSubframe->eventHandler().handleMouseLeaveEvent(mouseEvent);

- if (newSubframe) {

- // Update over/out state before passing the event to the subframe.

- updateMouseEventTargetNode(mev.innerNode(), mouseEvent, true);

- // Event dispatch in updateMouseEventTargetNode may have caused the subframe of the target

- // node to be detached from its FrameView, in which case the event should not be passed.

- if (newSubframe->view())

- swallowEvent |= passMouseMoveEventToSubframe(mev, newSubframe.get(), hoveredNode);

- } else {

- if (scrollbar && !m_mousePressed)

- scrollbar->mouseMoved(mouseEvent); // Handle hover effects on platforms that support visual feedback on scrollbar hovering.

- if (FrameView* view = m_frame->view()) {

- OptionalCursor optionalCursor = selectCursor(mev.hitTestResult());

- if (optionalCursor.isCursorChange()) {

- view->setCursor(optionalCursor.cursor());

- }

- m_lastMouseMoveEventSubframe = newSubframe;

- if (swallowEvent)

- return true;

- swallowEvent = !dispatchMouseEvent(EventTypeNames::mousemove, mev.innerNode(), 0, mouseEvent, true);

- if (!swallowEvent)

- swallowEvent = handleMouseDraggedEvent(mev);

- return swallowEvent;

-void EventHandler::invalidateClick()

- m_clickCount = 0;

- m_clickNode = nullptr;

-static ContainerNode* parentForClickEvent(const Node& node)

- // IE doesn't dispatch click events for mousedown/mouseup events across form

- // controls.

- if (node.isHTMLElement() && toHTMLElement(node).isInteractiveContent())

- return nullptr;

- return ComposedTreeTraversal::parent(node);

-bool EventHandler::handleMouseReleaseEvent(const PlatformMouseEvent& mouseEvent)

- TRACE_EVENT0("blink", "EventHandler::handleMouseReleaseEvent");

- RefPtrWillBeRawPtr<FrameView> protector(m_frame->view());

- m_frame->selection().setCaretBlinkingSuspended(false);

- OwnPtr<UserGestureIndicator> gestureIndicator;

- if (m_frame->localFrameRoot()->eventHandler().m_lastMouseDownUserGestureToken)

- gestureIndicator = adoptPtr(new UserGestureIndicator(m_frame->localFrameRoot()->eventHandler().m_lastMouseDownUserGestureToken.release()));

- else

- gestureIndicator = adoptPtr(new UserGestureIndicator(DefinitelyProcessingUserGesture));

-#if OS(WIN)

- if (Page* page = m_frame->page())

- page->autoscrollController().handleMouseReleaseForPanScrolling(m_frame, mouseEvent);

-#endif

- m_mousePressed = false;

- setLastKnownMousePosition(mouseEvent);

- if (m_svgPan) {

- m_svgPan = false;

- m_frame->document()->accessSVGExtensions().updatePan(m_frame->view()->rootFrameToContents(m_lastKnownMousePosition));

- return true;

- }

- if (m_frameSetBeingResized)

- return !dispatchMouseEvent(EventTypeNames::mouseup, m_frameSetBeingResized.get(), m_clickCount, mouseEvent, false);

- if (m_lastScrollbarUnderMouse) {

- invalidateClick();

- m_lastScrollbarUnderMouse->mouseUp(mouseEvent);

- bool setUnder = false;

- return !dispatchMouseEvent(EventTypeNames::mouseup, m_nodeUnderMouse.get(), m_clickCount, mouseEvent, setUnder);

- }

- // Mouse events simulated from touch should not hit-test again.

- ASSERT(!mouseEvent.fromTouch());

- HitTestRequest::HitTestRequestType hitType = HitTestRequest::Release;

- HitTestRequest request(hitType);

- MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);

- LocalFrame* subframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev);

- if (m_eventHandlerWillResetCapturingMouseEventsNode)

- m_capturingMouseEventsNode = nullptr;

- if (subframe && passMouseReleaseEventToSubframe(mev, subframe))

- return true;

- bool swallowMouseUpEvent = !dispatchMouseEvent(EventTypeNames::mouseup, mev.innerNode(), m_clickCount, mouseEvent, false);

- bool contextMenuEvent = mouseEvent.button() == RightButton;

-#if OS(MACOSX)

- // FIXME: The Mac port achieves the same behavior by checking whether the context menu is currently open in WebPage::mouseEvent(). Consider merging the implementations.

- if (mouseEvent.button() == LeftButton && mouseEvent.modifiers() & PlatformEvent::CtrlKey)

- contextMenuEvent = true;

-#endif

- bool swallowClickEvent = false;

- if (m_clickCount > 0 && !contextMenuEvent && mev.innerNode() && m_clickNode && mev.innerNode()->canParticipateInComposedTree() && m_clickNode->canParticipateInComposedTree()) {

- // Updates distribution because a 'mouseup' event listener can make the

- // tree dirty at dispatchMouseEvent() invocation above.

- // Unless distribution is updated, commonAncestor would hit ASSERT.

- // Both m_clickNode and mev.innerNode() don't need to be updated

- // because commonAncestor() will exit early if their documents are different.

- m_clickNode->updateDistribution();

- if (Node* clickTargetNode = mev.innerNode()->commonAncestor(*m_clickNode, parentForClickEvent))

- swallowClickEvent = !dispatchMouseEvent(EventTypeNames::click, clickTargetNode, m_clickCount, mouseEvent, true);

- }

- if (m_resizeScrollableArea) {

- m_resizeScrollableArea->setInResizeMode(false);

- m_resizeScrollableArea = nullptr;

- }

- bool swallowMouseReleaseEvent = false;

- if (!swallowMouseUpEvent)

- swallowMouseReleaseEvent = handleMouseReleaseEvent(mev);

- invalidateClick();

- return swallowMouseUpEvent || swallowClickEvent || swallowMouseReleaseEvent;

-bool EventHandler::handlePasteGlobalSelection(const PlatformMouseEvent& mouseEvent)

- // If the event was a middle click, attempt to copy global selection in after

- // the newly set caret position.

- //

- // This code is called from either the mouse up or mouse down handling. There

- // is some debate about when the global selection is pasted:

- // xterm: pastes on up.

- // GTK: pastes on down.

- // Qt: pastes on up.

- // Firefox: pastes on up.

- // Chromium: pastes on up.

- //

- // There is something of a webcompat angle to this well, as highlighted by

- // crbug.com/14608. Pages can clear text boxes 'onclick' and, if we paste on

- // down then the text is pasted just before the onclick handler runs and

- // clears the text box. So it's important this happens after the event

- // handlers have been fired.

- if (mouseEvent.type() != PlatformEvent::MouseReleased)

- return false;

- if (!m_frame->page())

- return false;

- Frame* focusFrame = m_frame->page()->focusController().focusedOrMainFrame();

- // Do not paste here if the focus was moved somewhere else.

- if (m_frame == focusFrame && m_frame->editor().behavior().supportsGlobalSelection())

- return m_frame->editor().command("PasteGlobalSelection").execute();

- return false;

-bool EventHandler::dispatchDragEvent(const AtomicString& eventType, Node* dragTarget, const PlatformMouseEvent& event, DataTransfer* dataTransfer)

- FrameView* view = m_frame->view();

- // FIXME: We might want to dispatch a dragleave even if the view is gone.

- if (!view)

- return false;

- RefPtrWillBeRawPtr<MouseEvent> me = MouseEvent::create(eventType,

- true, true, m_frame->document()->domWindow(),

- 0, event.globalPosition().x(), event.globalPosition().y(), event.position().x(), event.position().y(),

- event.movementDelta().x(), event.movementDelta().y(),

- event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(),

- 0, MouseEvent::platformModifiersToButtons(event.modifiers()), nullptr, dataTransfer);

- dragTarget->dispatchEvent(me.get(), IGNORE_EXCEPTION);

- return me->defaultPrevented();

-static bool targetIsFrame(Node* target, LocalFrame*& frame)

- if (!isHTMLFrameElementBase(target))

- return false;

- // Cross-process drag and drop is not yet supported.

- if (toHTMLFrameElementBase(target)->contentFrame() && !toHTMLFrameElementBase(target)->contentFrame()->isLocalFrame())

- return false;

- frame = toLocalFrame(toHTMLFrameElementBase(target)->contentFrame());

- return true;

-static bool findDropZone(Node* target, DataTransfer* dataTransfer)

- Element* element = target->isElementNode() ? toElement(target) : target->parentElement();

- for (; element; element = element->parentElement()) {

- bool matched = false;

- AtomicString dropZoneStr = element->fastGetAttribute(webkitdropzoneAttr);

- if (dropZoneStr.isEmpty())

- continue;

- UseCounter::count(element->document(), UseCounter::PrefixedHTMLElementDropzone);

- dropZoneStr = dropZoneStr.lower();

- SpaceSplitString keywords(dropZoneStr, SpaceSplitString::ShouldNotFoldCase);

- if (keywords.isNull())

- continue;

- DragOperation dragOperation = DragOperationNone;

- for (unsigned i = 0; i < keywords.size(); i++) {

- DragOperation op = convertDropZoneOperationToDragOperation(keywords[i]);

- if (op != DragOperationNone) {

- if (dragOperation == DragOperationNone)

- dragOperation = op;

- } else {

- matched = matched || dataTransfer->hasDropZoneType(keywords[i].string());

- }

- if (matched && dragOperation != DragOperationNone)

- break;

- }

- if (matched) {

- dataTransfer->setDropEffect(convertDragOperationToDropZoneOperation(dragOperation));

- return true;

- }

- return false;

-bool EventHandler::updateDragAndDrop(const PlatformMouseEvent& event, DataTransfer* dataTransfer)

- bool accept = false;

- if (!m_frame->view())

- return false;

- HitTestRequest request(HitTestRequest::ReadOnly);

- MouseEventWithHitTestResults mev = prepareMouseEvent(request, event);

- // Drag events should never go to text nodes (following IE, and proper mouseover/out dispatch)

- RefPtrWillBeRawPtr<Node> newTarget = mev.innerNode();

- if (newTarget && newTarget->isTextNode())

- newTarget = ComposedTreeTraversal::parent(*newTarget);

- if (AutoscrollController* controller = autoscrollController())

- controller->updateDragAndDrop(newTarget.get(), event.position(), event.timestamp());

- if (m_dragTarget != newTarget) {

- // FIXME: this ordering was explicitly chosen to match WinIE. However,

- // it is sometimes incorrect when dragging within subframes, as seen with

- // LayoutTests/fast/events/drag-in-frames.html.

- //

- // Moreover, this ordering conforms to section 7.9.4 of the HTML 5 spec. <http://dev.w3.org/html5/spec/Overview.html#drag-and-drop-processing-model>.

- LocalFrame* targetFrame;

- if (targetIsFrame(newTarget.get(), targetFrame)) {

- if (targetFrame)

- accept = targetFrame->eventHandler().updateDragAndDrop(event, dataTransfer);

- } else if (newTarget) {

- // As per section 7.9.4 of the HTML 5 spec., we must always fire a drag event before firing a dragenter, dragleave, or dragover event.

- if (dragState().m_dragSrc) {

- // for now we don't care if event handler cancels default behavior, since there is none

- dispatchDragSrcEvent(EventTypeNames::drag, event);

- }

- accept = dispatchDragEvent(EventTypeNames::dragenter, newTarget.get(), event, dataTransfer);

- if (!accept)

- accept = findDropZone(newTarget.get(), dataTransfer);

- }

- if (targetIsFrame(m_dragTarget.get(), targetFrame)) {

- if (targetFrame)

- accept = targetFrame->eventHandler().updateDragAndDrop(event, dataTransfer);

- } else if (m_dragTarget) {

- dispatchDragEvent(EventTypeNames::dragleave, m_dragTarget.get(), event, dataTransfer);

- }

- if (newTarget) {

- // We do not explicitly call dispatchDragEvent here because it could ultimately result in the appearance that

- // two dragover events fired. So, we mark that we should only fire a dragover event on the next call to this function.

- m_shouldOnlyFireDragOverEvent = true;

- }

- } else {

- LocalFrame* targetFrame;

- if (targetIsFrame(newTarget.get(), targetFrame)) {

- if (targetFrame)

- accept = targetFrame->eventHandler().updateDragAndDrop(event, dataTransfer);

- } else if (newTarget) {

- // Note, when dealing with sub-frames, we may need to fire only a dragover event as a drag event may have been fired earlier.

- if (!m_shouldOnlyFireDragOverEvent && dragState().m_dragSrc) {

- // for now we don't care if event handler cancels default behavior, since there is none

- dispatchDragSrcEvent(EventTypeNames::drag, event);

- }

- accept = dispatchDragEvent(EventTypeNames::dragover, newTarget.get(), event, dataTransfer);

- if (!accept)

- accept = findDropZone(newTarget.get(), dataTransfer);

- m_shouldOnlyFireDragOverEvent = false;

- }

- m_dragTarget = newTarget;

- return accept;

-void EventHandler::cancelDragAndDrop(const PlatformMouseEvent& event, DataTransfer* dataTransfer)

- LocalFrame* targetFrame;

- if (targetIsFrame(m_dragTarget.get(), targetFrame)) {

- if (targetFrame)

- targetFrame->eventHandler().cancelDragAndDrop(event, dataTransfer);

- } else if (m_dragTarget.get()) {

- if (dragState().m_dragSrc)

- dispatchDragSrcEvent(EventTypeNames::drag, event);

- dispatchDragEvent(EventTypeNames::dragleave, m_dragTarget.get(), event, dataTransfer);

- }

- clearDragState();

-bool EventHandler::performDragAndDrop(const PlatformMouseEvent& event, DataTransfer* dataTransfer)

- LocalFrame* targetFrame;

- bool preventedDefault = false;

- if (targetIsFrame(m_dragTarget.get(), targetFrame)) {

- if (targetFrame)

- preventedDefault = targetFrame->eventHandler().performDragAndDrop(event, dataTransfer);

- } else if (m_dragTarget.get()) {

- preventedDefault = dispatchDragEvent(EventTypeNames::drop, m_dragTarget.get(), event, dataTransfer);

- }

- clearDragState();

- return preventedDefault;

-void EventHandler::clearDragState()

- stopAutoscroll();

- m_dragTarget = nullptr;

- m_capturingMouseEventsNode = nullptr;

- m_shouldOnlyFireDragOverEvent = false;

-void EventHandler::setCapturingMouseEventsNode(PassRefPtrWillBeRawPtr<Node> n)

- m_capturingMouseEventsNode = n;

- m_eventHandlerWillResetCapturingMouseEventsNode = false;

-MouseEventWithHitTestResults EventHandler::prepareMouseEvent(const HitTestRequest& request, const PlatformMouseEvent& mev)

- ASSERT(m_frame);

- ASSERT(m_frame->document());

- return m_frame->document()->prepareMouseEvent(request, contentPointFromRootFrame(m_frame, mev.position()), mev);

-void EventHandler::updateMouseEventTargetNode(Node* targetNode, const PlatformMouseEvent& mouseEvent, bool fireMouseEvents)

- Node* result = targetNode;

- // If we're capturing, we always go right to that node.

- if (m_capturingMouseEventsNode) {

- result = m_capturingMouseEventsNode.get();

- } else {

- // If the target node is a text node, dispatch on the parent node - rdar://4196646

- if (result && result->isTextNode())

- result = ComposedTreeTraversal::parent(*result);

- }

- m_nodeUnderMouse = result;

- if (fireMouseEvents) {

- DeprecatedPaintLayer* layerForLastNode = layerForNode(m_lastNodeUnderMouse.get());

- DeprecatedPaintLayer* layerForNodeUnderMouse = layerForNode(m_nodeUnderMouse.get());

- Page* page = m_frame->page();

- if (m_lastNodeUnderMouse && (!m_nodeUnderMouse || m_nodeUnderMouse->document() != m_frame->document())) {

- // The mouse has moved between frames.

- if (LocalFrame* frame = m_lastNodeUnderMouse->document().frame()) {

- if (FrameView* frameView = frame->view())

- frameView->mouseExitedContentArea();

- }

- } else if (page && (layerForLastNode && (!layerForNodeUnderMouse || layerForNodeUnderMouse != layerForLastNode))) {

- // The mouse has moved between layers.

- if (ScrollableArea* scrollableAreaForLastNode = associatedScrollableArea(layerForLastNode))

- scrollableAreaForLastNode->mouseExitedContentArea();

- }

- if (m_nodeUnderMouse && (!m_lastNodeUnderMouse || m_lastNodeUnderMouse->document() != m_frame->document())) {

- // The mouse has moved between frames.

- if (LocalFrame* frame = m_nodeUnderMouse->document().frame()) {

- if (FrameView* frameView = frame->view())

- frameView->mouseEnteredContentArea();

- }

- } else if (page && (layerForNodeUnderMouse && (!layerForLastNode || layerForNodeUnderMouse != layerForLastNode))) {

- // The mouse has moved between layers.

- if (ScrollableArea* scrollableAreaForNodeUnderMouse = associatedScrollableArea(layerForNodeUnderMouse))

- scrollableAreaForNodeUnderMouse->mouseEnteredContentArea();

- }

- if (m_lastNodeUnderMouse && m_lastNodeUnderMouse->document() != m_frame->document()) {

- m_lastNodeUnderMouse = nullptr;

- m_lastScrollbarUnderMouse = nullptr;

- }

- if (m_lastNodeUnderMouse != m_nodeUnderMouse)

- sendMouseEventsForNodeTransition(m_lastNodeUnderMouse.get(), m_nodeUnderMouse.get(), mouseEvent);

- m_lastNodeUnderMouse = m_nodeUnderMouse;

- }

-void EventHandler::sendMouseEventsForNodeTransition(Node* exitedNode, Node* enteredNode, const PlatformMouseEvent& mouseEvent)

- ASSERT(exitedNode != enteredNode);

- // First, dispatch mouseout event (which bubbles to ancestors)

- if (exitedNode)

- exitedNode->dispatchMouseEvent(mouseEvent, EventTypeNames::mouseout, 0, enteredNode);

- // A note on mouseenter and mouseleave: These are non-bubbling events, and they are dispatched if there

- // is a capturing event handler on an ancestor or a normal event handler on the element itself. This special

- // handling is necessary to avoid O(n^2) capturing event handler checks.

- //

- // Note, however, that this optimization can possibly cause some unanswered/missing/redundant mouseenter or

- // mouseleave events in certain contrived eventhandling scenarios, e.g., when:

- // - the mouseleave handler for a node sets the only capturing-mouseleave-listener in its ancestor, or

- // - DOM mods in any mouseenter/mouseleave handler changes the common ancestor of exited & entered nodes, etc.

- // We think the spec specifies a "frozen" state to avoid such corner cases (check the discussion on "candidate event

- // listeners" at http://www.w3.org/TR/uievents), but our code below preserves one such behavior from past only to

- // match Firefox and IE behavior.

- //

- // TODO(mustaq): Confirm spec conformance, double-check with other browsers.

- // Create lists of all exited/entered ancestors.

- WillBeHeapVector<RefPtrWillBeMember<Node>, 32> exitedAncestors;

- WillBeHeapVector<RefPtrWillBeMember<Node>, 32> enteredAncestors;

- if (exitedNode) {

- exitedNode->updateDistribution();

- for (Node* node = exitedNode; node; node = ComposedTreeTraversal::parent(*node)) {

- exitedAncestors.append(node);

- }

- if (enteredNode) {

- enteredNode->updateDistribution();

- for (Node* node = enteredNode; node; node = ComposedTreeTraversal::parent(*node)) {

- enteredAncestors.append(node);

- }

- size_t numExitedAncestors = exitedAncestors.size();

- size_t numEnteredAncestors = enteredAncestors.size();

- // Locate the common ancestor in the two lists. Start with the assumption that it's off both the lists.

- size_t exitedAncestorIndex = numExitedAncestors;

- size_t enteredAncestorIndex = numEnteredAncestors;

- for (size_t j = 0; j < numExitedAncestors; j++) {

- for (size_t i = 0; i < numEnteredAncestors; i++) {

- if (exitedAncestors[j] == enteredAncestors[i]) {

- exitedAncestorIndex = j;

- enteredAncestorIndex = i;

- break;

- }

- if (exitedAncestorIndex < numExitedAncestors)

- break;

- }

- // Determine if there is a capturing mouseleave listener in an ancestor.

- bool exitedNodeHasCapturingAncestor = false;

- for (size_t j = 0; j < numExitedAncestors; j++) {

- if (exitedAncestors[j]->hasCapturingEventListeners(EventTypeNames::mouseleave))

- exitedNodeHasCapturingAncestor = true;

- }

- // Send mouseleave events to appropriate exited ancestors, in child-to-parent order.

- for (size_t j = 0; j < exitedAncestorIndex; j++) {

- if (exitedNodeHasCapturingAncestor || exitedAncestors[j]->hasEventListeners(EventTypeNames::mouseleave))

- exitedAncestors[j]->dispatchMouseEvent(mouseEvent, EventTypeNames::mouseleave, 0, enteredNode);

- }

- // Dispatch mouseover event (which bubbles to ancestors) after the mouseleave events are sent.

- if (enteredNode)

- enteredNode->dispatchMouseEvent(mouseEvent, EventTypeNames::mouseover, 0, exitedNode);

- // Determine if there is a capturing mouseenter listener in an ancestor. This must be done /after/ dispatching the

- // mouseleave events because the handler for mouseleave might set a capturing mouseenter handler.

- bool enteredNodeHasCapturingAncestor = false;

- for (size_t i = 0; i < numEnteredAncestors; i++) {

- if (enteredAncestors[i]->hasCapturingEventListeners(EventTypeNames::mouseenter))

- enteredNodeHasCapturingAncestor = true;

- }

- // Send mouseenter events to appropriate entered ancestors, in parent-to-child order.

- for (size_t i = enteredAncestorIndex; i > 0; i--) {

- if (enteredNodeHasCapturingAncestor || enteredAncestors[i-1]->hasEventListeners(EventTypeNames::mouseenter))

- enteredAncestors[i-1]->dispatchMouseEvent(mouseEvent, EventTypeNames::mouseenter, 0, exitedNode);

- }

-// The return value means 'continue default handling.'

-// TODO(mustaq): setUnder needs a more informative name.

-bool EventHandler::dispatchMouseEvent(const AtomicString& eventType, Node* targetNode, int clickCount, const PlatformMouseEvent& mouseEvent, bool setUnder)

- updateMouseEventTargetNode(targetNode, mouseEvent, setUnder);

- return !m_nodeUnderMouse || m_nodeUnderMouse->dispatchMouseEvent(mouseEvent, eventType, clickCount);

-// The return value means 'swallow event' (was handled), as for other handle* functions.

-bool EventHandler::handleMouseFocus(const MouseEventWithHitTestResults& targetedEvent)

- const PlatformMouseEvent& mouseEvent = targetedEvent.event();

- // If clicking on a frame scrollbar, do not mess up with content focus.

- if (FrameView* view = m_frame->view()) {

- if (view->scrollbarAtRootFramePoint(mouseEvent.position()))

- return false;

- }

- // The layout needs to be up to date to determine if an element is focusable.

- m_frame->document()->updateLayoutIgnorePendingStylesheets();

- Element* element = nullptr;

- if (m_nodeUnderMouse)

- element = m_nodeUnderMouse->isElementNode() ? toElement(m_nodeUnderMouse) : m_nodeUnderMouse->parentOrShadowHostElement();

- for (; element; element = element->parentOrShadowHostElement()) {

- if (element->isFocusable() && element->isFocusedElementInDocument())

- return false;

- if (element->isMouseFocusable())

- break;

- }

- ASSERT(!element || element->isMouseFocusable());

- // To fix <rdar://problem/4895428> Can't drag selected ToDo, we don't focus

- // a node on mouse down if it's selected and inside a focused node. It will

- // be focused if the user does a mouseup over it, however, because the

- // mouseup will set a selection inside it, which will call

- // FrameSelection::setFocusedNodeIfNeeded.

- if (element

- && m_frame->selection().isRange()

- && m_frame->selection().toNormalizedRange()->compareNode(element, IGNORE_EXCEPTION) == Range::NODE_INSIDE

- && element->isDescendantOf(m_frame->document()->focusedElement()))

- return false;

- // Only change the focus when clicking scrollbars if it can transfered to a

- // mouse focusable node.

- if (!element && targetedEvent.hitTestResult().scrollbar())

- return true;

- if (Page* page = m_frame->page()) {

- // If focus shift is blocked, we eat the event. Note we should never

- // clear swallowEvent if the page already set it (e.g., by canceling

- // default behavior).

- if (element) {

- if (!page->focusController().setFocusedElement(element, m_frame, WebFocusTypeMouse))

- return true;

- } else {

- // We call setFocusedElement even with !element in order to blur

- // current focus element when a link is clicked; this is expected by

- // some sites that rely on onChange handlers running from form

- // fields before the button click is processed.

- if (!page->focusController().setFocusedElement(0, m_frame))

- return true;

- }

- return false;

-bool EventHandler::handleWheelEvent(const PlatformWheelEvent& event)

-#define RETURN_WHEEL_EVENT_HANDLED() \

- { \

- setFrameWasScrolledByUser(); \

- return true; \

- }

- Document* doc = m_frame->document();

- if (!doc->layoutView())

- return false;

- RefPtrWillBeRawPtr<FrameView> protector(m_frame->view());

- FrameView* view = m_frame->view();

- if (!view)

- return false;

- LayoutPoint vPoint = view->rootFrameToContents(event.position());

- HitTestRequest request(HitTestRequest::ReadOnly);

- HitTestResult result(request, vPoint);

- doc->layoutView()->hitTest(result);

- Node* node = result.innerNode();

- // Wheel events should not dispatch to text nodes.

- if (node && node->isTextNode())

- node = ComposedTreeTraversal::parent(*node);

- bool isOverWidget;

- if (event.useLatchedEventNode()) {

- if (!m_latchedWheelEventNode) {

- m_latchedWheelEventNode = node;

- m_widgetIsLatched = result.isOverWidget();

- } else {

- node = m_latchedWheelEventNode.get();

- }

- isOverWidget = m_widgetIsLatched;

- } else {

- if (m_latchedWheelEventNode)

- m_latchedWheelEventNode = nullptr;

- if (m_previousWheelScrolledNode)

- m_previousWheelScrolledNode = nullptr;

- isOverWidget = result.isOverWidget();

- }

- if (node) {

- // Figure out which view to send the event to.

- LayoutObject* target = node->layoutObject();

- if (isOverWidget && target && target->isLayoutPart()) {

- Widget* widget = toLayoutPart(target)->widget();

- if (widget && passWheelEventToWidget(event, *widget))

- RETURN_WHEEL_EVENT_HANDLED();

- }

- if (node && !node->dispatchWheelEvent(event))

- RETURN_WHEEL_EVENT_HANDLED();

- }

- // We do another check on the frame view because the event handler can run

- // JS which results in the frame getting destroyed.

- view = m_frame->view();

- if (!view)

- return false;

- if (view->scrollableArea()->handleWheel(event).didScroll)

- RETURN_WHEEL_EVENT_HANDLED();

- return false;

-#undef RETURN_WHEEL_EVENT_HANDLED

-void EventHandler::defaultWheelEventHandler(Node* startNode, WheelEvent* wheelEvent)

- if (!startNode || !wheelEvent)

- return;

- // When the wheelEvent do not scroll, we trigger zoom in/out instead.

- if (!wheelEvent->canScroll())

- return;

- Node* stopNode = m_previousWheelScrolledNode.get();

- ScrollGranularity granularity = wheelGranularityToScrollGranularity(wheelEvent);

- IntPoint absolutePosition = roundedIntPoint(wheelEvent->absoluteLocation());

- // Break up into two scrolls if we need to. Diagonal movement on

- // a MacBook pro is an example of a 2-dimensional mouse wheel event (where both deltaX and deltaY can be set).

- // FIXME: enable scroll customization in this case. See crbug.com/410974.

- if (wheelEvent->railsMode() != Event::RailsModeVertical

- && scroll(ScrollRightIgnoringWritingMode, granularity, startNode, &stopNode, wheelEvent->deltaX(), absolutePosition))

- wheelEvent->setDefaultHandled();

- if (wheelEvent->railsMode() != Event::RailsModeHorizontal

- && scroll(ScrollDownIgnoringWritingMode, granularity, startNode, &stopNode, wheelEvent->deltaY(), absolutePosition))

- wheelEvent->setDefaultHandled();

- if (!m_latchedWheelEventNode)

- m_previousWheelScrolledNode = stopNode;

-bool EventHandler::handleGestureShowPress()

- m_lastShowPressTimestamp = WTF::currentTime();

- FrameView* view = m_frame->view();

- if (!view)

- return false;

- if (ScrollAnimator* scrollAnimator = view->existingScrollAnimator())

- scrollAnimator->cancelAnimations();

- const FrameView::ScrollableAreaSet* areas = view->scrollableAreas();

- if (!areas)

- return false;

- for (const ScrollableArea* scrollableArea : *areas) {

- ScrollAnimator* animator = scrollableArea->existingScrollAnimator();

- if (animator)

- animator->cancelAnimations();

- }

- return false;

-bool EventHandler::handleGestureEvent(const PlatformGestureEvent& gestureEvent)

- // Propagation to inner frames is handled below this function.

- ASSERT(m_frame == m_frame->localFrameRoot());

- // Scrolling-related gesture events invoke EventHandler recursively for each frame down

- // the chain, doing a single-frame hit-test per frame. This matches handleWheelEvent.

- // FIXME: Add a test that traverses this path, e.g. for devtools overlay.

- if (gestureEvent.isScrollEvent())

- return handleGestureScrollEvent(gestureEvent);

- // Hit test across all frames and do touch adjustment as necessary for the event type.

- GestureEventWithHitTestResults targetedEvent = targetGestureEvent(gestureEvent);

- return handleGestureEvent(targetedEvent);

-bool EventHandler::handleGestureEvent(const GestureEventWithHitTestResults& targetedEvent)

- TRACE_EVENT0("input", "EventHandler::handleGestureEvent");

- // Propagation to inner frames is handled below this function.

- ASSERT(m_frame == m_frame->localFrameRoot());

- // Non-scrolling related gesture events do a single cross-frame hit-test and jump

- // directly to the inner most frame. This matches handleMousePressEvent etc.

- ASSERT(!targetedEvent.event().isScrollEvent());

- // Route to the correct frame.

- if (LocalFrame* innerFrame = targetedEvent.hitTestResult().innerNodeFrame())

- return innerFrame->eventHandler().handleGestureEventInFrame(targetedEvent);

- // No hit test result, handle in root instance. Perhaps we should just return false instead?

- return handleGestureEventInFrame(targetedEvent);

-bool EventHandler::handleGestureEventInFrame(const GestureEventWithHitTestResults& targetedEvent)

- ASSERT(!targetedEvent.event().isScrollEvent());

- RefPtrWillBeRawPtr<Node> eventTarget = targetedEvent.hitTestResult().innerNode();

- RefPtrWillBeRawPtr<Scrollbar> scrollbar = targetedEvent.hitTestResult().scrollbar();

- const PlatformGestureEvent& gestureEvent = targetedEvent.event();

- if (scrollbar) {

- bool eventSwallowed = scrollbar->gestureEvent(gestureEvent);

- if (gestureEvent.type() == PlatformEvent::GestureTapDown && eventSwallowed)

- m_scrollbarHandlingScrollGesture = scrollbar;

- if (eventSwallowed)

- return true;

- }

- if (eventTarget && eventTarget->dispatchGestureEvent(gestureEvent))

- return true;

- switch (gestureEvent.type()) {

- case PlatformEvent::GestureTap:

- return handleGestureTap(targetedEvent);

- case PlatformEvent::GestureShowPress:

- return handleGestureShowPress();

- case PlatformEvent::GestureLongPress:

- return handleGestureLongPress(targetedEvent);

- case PlatformEvent::GestureLongTap:

- return handleGestureLongTap(targetedEvent);

- case PlatformEvent::GestureTwoFingerTap:

- return sendContextMenuEventForGesture(targetedEvent);

- case PlatformEvent::GestureTapDown:

- case PlatformEvent::GesturePinchBegin:

- case PlatformEvent::GesturePinchEnd:

- case PlatformEvent::GesturePinchUpdate:

- case PlatformEvent::GestureTapDownCancel:

- case PlatformEvent::GestureTapUnconfirmed:

- break;

- default:

- ASSERT_NOT_REACHED();

- }

- return false;

-bool EventHandler::handleGestureScrollEvent(const PlatformGestureEvent& gestureEvent)

- TRACE_EVENT0("input", "EventHandler::handleGestureScrollEvent");

- RefPtrWillBeRawPtr<Node> eventTarget = nullptr;

- RefPtrWillBeRawPtr<Scrollbar> scrollbar = nullptr;

- if (gestureEvent.type() != PlatformEvent::GestureScrollBegin) {

- scrollbar = m_scrollbarHandlingScrollGesture.get();

- eventTarget = m_scrollGestureHandlingNode.get();

- }

- if (!eventTarget) {

- Document* document = m_frame->document();

- if (!document->layoutView())

- return false;

- FrameView* view = m_frame->view();

- LayoutPoint viewPoint = view->rootFrameToContents(gestureEvent.position());

- HitTestRequest request(HitTestRequest::ReadOnly);

- HitTestResult result(request, viewPoint);

- document->layoutView()->hitTest(result);

- eventTarget = result.innerNode();

- m_lastGestureScrollOverWidget = result.isOverWidget();

- m_scrollGestureHandlingNode = eventTarget;

- m_previousGestureScrolledNode = nullptr;

- if (!scrollbar)

- scrollbar = result.scrollbar();

- }

- if (scrollbar) {

- bool eventSwallowed = scrollbar->gestureEvent(gestureEvent);

- if (gestureEvent.type() == PlatformEvent::GestureScrollEnd

- || gestureEvent.type() == PlatformEvent::GestureFlingStart

- || !eventSwallowed) {

- m_scrollbarHandlingScrollGesture = nullptr;

- }

- if (eventSwallowed)

- return true;

- }

- if (eventTarget) {

- bool eventSwallowed = handleScrollGestureOnResizer(eventTarget.get(), gestureEvent);

- if (!eventSwallowed)

- eventSwallowed = eventTarget->dispatchGestureEvent(gestureEvent);

- if (eventSwallowed)

- return true;

- }

- switch (gestureEvent.type()) {

- case PlatformEvent::GestureScrollBegin:

- return handleGestureScrollBegin(gestureEvent);

- case PlatformEvent::GestureScrollUpdate:

- return handleGestureScrollUpdate(gestureEvent);

- case PlatformEvent::GestureScrollEnd:

- return handleGestureScrollEnd(gestureEvent);

- case PlatformEvent::GestureFlingStart:

- case PlatformEvent::GesturePinchBegin:

- case PlatformEvent::GesturePinchEnd:

- case PlatformEvent::GesturePinchUpdate:

- return false;

- default:

- ASSERT_NOT_REACHED();

- return false;

- }

-bool EventHandler::handleGestureTap(const GestureEventWithHitTestResults& targetedEvent)

- RefPtrWillBeRawPtr<FrameView> frameView(m_frame->view());

- const PlatformGestureEvent& gestureEvent = targetedEvent.event();

- HitTestRequest::HitTestRequestType hitType = getHitTypeForGestureType(gestureEvent.type());

- uint64_t preDispatchDomTreeVersion = m_frame->document()->domTreeVersion();

- uint64_t preDispatchStyleVersion = m_frame->document()->styleVersion();

- UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);

- HitTestResult currentHitTest = targetedEvent.hitTestResult();

- // We use the adjusted position so the application isn't surprised to see a event with

- // co-ordinates outside the target's bounds.

- IntPoint adjustedPoint = frameView->rootFrameToContents(gestureEvent.position());

- unsigned modifiers = gestureEvent.modifiers();

- PlatformMouseEvent fakeMouseMove(gestureEvent.position(), gestureEvent.globalPosition(),

- NoButton, PlatformEvent::MouseMoved, /* clickCount */ 0,

- static_cast<PlatformEvent::Modifiers>(modifiers),

- PlatformMouseEvent::FromTouch, gestureEvent.timestamp());

- dispatchMouseEvent(EventTypeNames::mousemove, currentHitTest.innerNode(), 0, fakeMouseMove, true);

- // Do a new hit-test in case the mousemove event changed the DOM.

- // Note that if the original hit test wasn't over an element (eg. was over a scrollbar) we

- // don't want to re-hit-test because it may be in the wrong frame (and there's no way the page

- // could have seen the event anyway).

- // Also note that the position of the frame may have changed, so we need to recompute the content

- // co-ordinates (updating layout/style as hitTestResultAtPoint normally would).

- // FIXME: Use a hit-test cache to avoid unnecessary hit tests. http://crbug.com/398920

- if (currentHitTest.innerNode()) {

- LocalFrame* mainFrame = m_frame->localFrameRoot();

- if (mainFrame && mainFrame->view())

- mainFrame->view()->updateLayoutAndStyleForPainting();

- adjustedPoint = frameView->rootFrameToContents(gestureEvent.position());

- currentHitTest = hitTestResultInFrame(m_frame, adjustedPoint, hitType);

- }

- m_clickNode = currentHitTest.innerNode();

- // Capture data for showUnhandledTapUIIfNeeded.

- RefPtrWillBeRawPtr<Node> tappedNode = m_clickNode;

- IntPoint tappedPosition = gestureEvent.position();

- if (m_clickNode && m_clickNode->isTextNode())

- m_clickNode = ComposedTreeTraversal::parent(*m_clickNode);

- PlatformMouseEvent fakeMouseDown(gestureEvent.position(), gestureEvent.globalPosition(),

- LeftButton, PlatformEvent::MousePressed, gestureEvent.tapCount(),

- static_cast<PlatformEvent::Modifiers>(modifiers | PlatformEvent::LeftButtonDown),

- PlatformMouseEvent::FromTouch, gestureEvent.timestamp());

- bool swallowMouseDownEvent = !dispatchMouseEvent(EventTypeNames::mousedown, currentHitTest.innerNode(), gestureEvent.tapCount(), fakeMouseDown, true);

- if (!swallowMouseDownEvent)

- swallowMouseDownEvent = handleMouseFocus(MouseEventWithHitTestResults(fakeMouseDown, currentHitTest));

- if (!swallowMouseDownEvent)

- swallowMouseDownEvent = handleMousePressEvent(MouseEventWithHitTestResults(fakeMouseDown, currentHitTest));

- // FIXME: Use a hit-test cache to avoid unnecessary hit tests. http://crbug.com/398920

- if (currentHitTest.innerNode()) {

- LocalFrame* mainFrame = m_frame->localFrameRoot();

- if (mainFrame && mainFrame->view())

- mainFrame->view()->updateLayoutAndStyleForPainting();

- adjustedPoint = frameView->rootFrameToContents(gestureEvent.position());

- currentHitTest = hitTestResultInFrame(m_frame, adjustedPoint, hitType);

- }

- PlatformMouseEvent fakeMouseUp(gestureEvent.position(), gestureEvent.globalPosition(),

- LeftButton, PlatformEvent::MouseReleased, gestureEvent.tapCount(),

- static_cast<PlatformEvent::Modifiers>(modifiers),

- PlatformMouseEvent::FromTouch, gestureEvent.timestamp());

- bool swallowMouseUpEvent = !dispatchMouseEvent(EventTypeNames::mouseup, currentHitTest.innerNode(), gestureEvent.tapCount(), fakeMouseUp, false);

- bool swallowClickEvent = false;

- if (m_clickNode) {

- if (currentHitTest.innerNode()) {

- // Updates distribution because a mouseup (or mousedown) event listener can make the

- // tree dirty at dispatchMouseEvent() invocation above.

- // Unless distribution is updated, commonAncestor would hit ASSERT.

- // Both m_clickNode and currentHitTest.innerNode()) don't need to be updated

- // because commonAncestor() will exit early if their documents are different.

- m_clickNode->updateDistribution();

- Node* clickTargetNode = currentHitTest.innerNode()->commonAncestor(*m_clickNode, parentForClickEvent);

- swallowClickEvent = !dispatchMouseEvent(EventTypeNames::click, clickTargetNode, gestureEvent.tapCount(), fakeMouseUp, true);

- }

- m_clickNode = nullptr;

- }

- if (!swallowMouseUpEvent)

- swallowMouseUpEvent = handleMouseReleaseEvent(MouseEventWithHitTestResults(fakeMouseUp, currentHitTest));

- bool swallowed = swallowMouseDownEvent | swallowMouseUpEvent | swallowClickEvent;

- if (!swallowed && tappedNode && m_frame->page()) {

- bool domTreeChanged = preDispatchDomTreeVersion != m_frame->document()->domTreeVersion();

- bool styleChanged = preDispatchStyleVersion != m_frame->document()->styleVersion();

- IntPoint tappedPositionInViewport = m_frame->page()->frameHost().pinchViewport().rootFrameToViewport(tappedPosition);

- m_frame->chromeClient().showUnhandledTapUIIfNeeded(tappedPositionInViewport, tappedNode.get(), domTreeChanged || styleChanged);

- }

- return swallowed;

-bool EventHandler::handleGestureLongPress(const GestureEventWithHitTestResults& targetedEvent)

- const PlatformGestureEvent& gestureEvent = targetedEvent.event();

- IntPoint adjustedPoint = gestureEvent.position();

- unsigned modifiers = gestureEvent.modifiers();

- // FIXME: Ideally we should try to remove the extra mouse-specific hit-tests here (re-using the

- // supplied HitTestResult), but that will require some overhaul of the touch drag-and-drop code

- // and LongPress is such a special scenario that it's unlikely to matter much in practice.

- m_longTapShouldInvokeContextMenu = false;

- if (m_frame->settings() && m_frame->settings()->touchDragDropEnabled() && m_frame->view()) {

- PlatformMouseEvent mouseDownEvent(adjustedPoint, gestureEvent.globalPosition(), LeftButton, PlatformEvent::MousePressed, 1,

- static_cast<PlatformEvent::Modifiers>(modifiers | PlatformEvent::LeftButtonDown),

- PlatformMouseEvent::FromTouch, WTF::currentTime());

- m_mouseDown = mouseDownEvent;

- PlatformMouseEvent mouseDragEvent(adjustedPoint, gestureEvent.globalPosition(), LeftButton, PlatformEvent::MouseMoved, 1,

- static_cast<PlatformEvent::Modifiers>(modifiers | PlatformEvent::LeftButtonDown),

- PlatformMouseEvent::FromTouch, WTF::currentTime());

- HitTestRequest request(HitTestRequest::ReadOnly);

- MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseDragEvent);

- m_mouseDownMayStartDrag = true;

- dragState().m_dragSrc = nullptr;

- m_mouseDownPos = m_frame->view()->rootFrameToContents(mouseDragEvent.position());

- RefPtrWillBeRawPtr<FrameView> protector(m_frame->view());

- if (handleDrag(mev, DragInitiator::Touch)) {

- m_longTapShouldInvokeContextMenu = true;

- return true;

- }

-#if OS(ANDROID)

- bool shouldLongPressSelectWord = true;

-#else

- bool shouldLongPressSelectWord = m_frame->settings() && m_frame->settings()->touchEditingEnabled();

-#endif

- if (shouldLongPressSelectWord) {

- IntPoint hitTestPoint = m_frame->view()->rootFrameToContents(gestureEvent.position());

- HitTestResult result = hitTestResultAtPoint(hitTestPoint);

- Node* innerNode = result.innerNode();

- if (!result.isLiveLink() && innerNode && (innerNode->isContentEditable() || innerNode->isTextNode()

-#if OS(ANDROID)

- || innerNode->canStartSelection()

-#endif

- )) {

- selectClosestWordFromHitTestResult(result, DontAppendTrailingWhitespace);

- if (m_frame->selection().isRange()) {

- focusDocumentView();

- return true;

- }

- return sendContextMenuEventForGesture(targetedEvent);

-bool EventHandler::handleGestureLongTap(const GestureEventWithHitTestResults& targetedEvent)

-#if !OS(ANDROID)

- if (m_longTapShouldInvokeContextMenu) {

- m_longTapShouldInvokeContextMenu = false;

- return sendContextMenuEventForGesture(targetedEvent);

- }

-#endif

- return false;

-bool EventHandler::handleScrollGestureOnResizer(Node* eventTarget, const PlatformGestureEvent& gestureEvent)

- if (gestureEvent.type() == PlatformEvent::GestureScrollBegin) {

- DeprecatedPaintLayer* layer = eventTarget->layoutObject() ? eventTarget->layoutObject()->enclosingLayer() : nullptr;

- IntPoint p = m_frame->view()->rootFrameToContents(gestureEvent.position());

- if (layer && layer->scrollableArea() && layer->scrollableArea()->isPointInResizeControl(p, ResizerForTouch)) {

- m_resizeScrollableArea = layer->scrollableArea();

- m_resizeScrollableArea->setInResizeMode(true);

- m_offsetFromResizeCorner = LayoutSize(m_resizeScrollableArea->offsetFromResizeCorner(p));

- return true;

- }

- } else if (gestureEvent.type() == PlatformEvent::GestureScrollUpdate) {

- if (m_resizeScrollableArea && m_resizeScrollableArea->inResizeMode()) {

- m_resizeScrollableArea->resize(gestureEvent, m_offsetFromResizeCorner);

- return true;

- }

- } else if (gestureEvent.type() == PlatformEvent::GestureScrollEnd) {

- if (m_resizeScrollableArea && m_resizeScrollableArea->inResizeMode()) {

- m_resizeScrollableArea->setInResizeMode(false);

- m_resizeScrollableArea = nullptr;

- return false;

- }

- return false;

-bool EventHandler::passScrollGestureEventToWidget(const PlatformGestureEvent& gestureEvent, LayoutObject* layoutObject)

- ASSERT(gestureEvent.isScrollEvent());

- if (!m_lastGestureScrollOverWidget)

- return false;

- if (!layoutObject || !layoutObject->isLayoutPart())

- return false;

- Widget* widget = toLayoutPart(layoutObject)->widget();

- if (!widget || !widget->isFrameView())

- return false;

- return toFrameView(widget)->frame().eventHandler().handleGestureScrollEvent(gestureEvent);

-bool EventHandler::handleGestureScrollEnd(const PlatformGestureEvent& gestureEvent)

- RefPtrWillBeRawPtr<Node> node = m_scrollGestureHandlingNode;

- if (node) {

- passScrollGestureEventToWidget(gestureEvent, node->layoutObject());

- if (RuntimeEnabledFeatures::scrollCustomizationEnabled()) {

- RefPtrWillBeRawPtr<ScrollState> scrollState = ScrollState::create(

- 0, 0, 0, 0, 0, gestureEvent.inertial(), /* isBeginning */

- false, /* isEnding */ true, /* fromUserInput */ true);

- customizedScroll(*node.get(), *scrollState);

- }

- clearGestureScrollNodes();

- return false;

-bool EventHandler::handleGestureScrollBegin(const PlatformGestureEvent& gestureEvent)

- Document* document = m_frame->document();

- if (!document->layoutView())

- return false;

- FrameView* view = m_frame->view();

- if (!view)

- return false;

- // If there's no layoutObject on the node, send the event to the nearest ancestor with a layoutObject.

- // Needed for <option> and <optgroup> elements so we can touch scroll <select>s

- while (m_scrollGestureHandlingNode && !m_scrollGestureHandlingNode->layoutObject())

- m_scrollGestureHandlingNode = m_scrollGestureHandlingNode->parentOrShadowHostNode();

- if (!m_scrollGestureHandlingNode) {

- if (RuntimeEnabledFeatures::scrollCustomizationEnabled())

- m_scrollGestureHandlingNode = m_frame->document()->documentElement();

- else

- return false;

- }

- ASSERT(m_scrollGestureHandlingNode);

- passScrollGestureEventToWidget(gestureEvent, m_scrollGestureHandlingNode->layoutObject());

- if (RuntimeEnabledFeatures::scrollCustomizationEnabled()) {

- m_currentScrollChain.clear();

- RefPtrWillBeRawPtr<ScrollState> scrollState = ScrollState::create(

- 0, 0, 0, 0, 0, /* inInertialPhase */ false, /* isBeginning */

- true, /* isEnding */ false, /* fromUserInput */ true);

- customizedScroll(*m_scrollGestureHandlingNode.get(), *scrollState);

- } else {

- if (m_frame->isMainFrame())

- m_frame->host()->topControls().scrollBegin();

- }

- return true;

-bool EventHandler::handleGestureScrollUpdate(const PlatformGestureEvent& gestureEvent)

- ASSERT(gestureEvent.type() == PlatformEvent::GestureScrollUpdate);

- FloatSize delta(gestureEvent.deltaX(), gestureEvent.deltaY());

- if (delta.isZero())

- return false;

- Node* node = m_scrollGestureHandlingNode.get();

- if (node) {

- LayoutObject* layoutObject = node->layoutObject();

- if (!layoutObject)

- return false;

- RefPtrWillBeRawPtr<FrameView> protector(m_frame->view());

- Node* stopNode = nullptr;

- // Try to send the event to the correct view.

- if (passScrollGestureEventToWidget(gestureEvent, layoutObject)) {

- if (gestureEvent.preventPropagation()

- && !RuntimeEnabledFeatures::scrollCustomizationEnabled()) {

- // This is an optimization which doesn't apply with

- // scroll customization enabled.

- m_previousGestureScrolledNode = m_scrollGestureHandlingNode;

- }

- // FIXME: we should allow simultaneous scrolling of nested

- // iframes along perpendicular axes. See crbug.com/466991.

- m_deltaConsumedForScrollSequence = true;

- return true;

- }

- bool scrolled = false;

- if (RuntimeEnabledFeatures::scrollCustomizationEnabled()) {

- RefPtrWillBeRawPtr<ScrollState> scrollState = ScrollState::create(

- gestureEvent.deltaX(), gestureEvent.deltaY(),

- 0, gestureEvent.velocityX(), gestureEvent.velocityY(),

- gestureEvent.inertial(), /* isBeginning */

- false, /* isEnding */ false, /* fromUserInput */ true,

- !gestureEvent.preventPropagation(), m_deltaConsumedForScrollSequence);

- if (m_previousGestureScrolledNode) {

- // The ScrollState needs to know what the current

- // native scrolling element is, so that for an

- // inertial scroll that shouldn't propagate, only the

- // currently scrolling element responds.

- ASSERT(m_previousGestureScrolledNode->isElementNode());

- scrollState->setCurrentNativeScrollingElement(toElement(m_previousGestureScrolledNode.get()));

- }

- customizedScroll(*node, *scrollState);

- m_previousGestureScrolledNode = scrollState->currentNativeScrollingElement();

- m_deltaConsumedForScrollSequence = scrollState->deltaConsumedForScrollSequence();

- scrolled = scrollState->deltaX() != gestureEvent.deltaX()

- || scrollState->deltaY() != gestureEvent.deltaY();

- } else {

- if (gestureEvent.preventPropagation())

- stopNode = m_previousGestureScrolledNode.get();

- // First try to scroll the closest scrollable LayoutBox ancestor of |node|.

- ScrollGranularity granularity = ScrollByPrecisePixel;

- bool horizontalScroll = scroll(ScrollLeftIgnoringWritingMode, granularity, node, &stopNode, delta.width());

- if (!gestureEvent.preventPropagation())

- stopNode = nullptr;

- bool verticalScroll = scroll(ScrollUpIgnoringWritingMode, granularity, node, &stopNode, delta.height());

- scrolled = horizontalScroll || verticalScroll;

- if (gestureEvent.preventPropagation())

- m_previousGestureScrolledNode = stopNode;

- }

- if (scrolled) {

- setFrameWasScrolledByUser();

- return true;

- }

- if (RuntimeEnabledFeatures::scrollCustomizationEnabled())

- return false;

- // Try to scroll the frame view.

- if (m_frame->applyScrollDelta(delta, false)) {

- setFrameWasScrolledByUser();

- return true;

- }

- return false;

-void EventHandler::clearGestureScrollNodes()

- m_scrollGestureHandlingNode = nullptr;

- m_previousGestureScrolledNode = nullptr;

- m_deltaConsumedForScrollSequence = false;

- m_currentScrollChain.clear();

-bool EventHandler::isScrollbarHandlingGestures() const

- return m_scrollbarHandlingScrollGesture.get();

-bool EventHandler::shouldApplyTouchAdjustment(const PlatformGestureEvent& event) const

- if (m_frame->settings() && !m_frame->settings()->touchAdjustmentEnabled())

- return false;

- return !event.area().isEmpty();

-bool EventHandler::bestClickableNodeForHitTestResult(const HitTestResult& result, IntPoint& targetPoint, Node*& targetNode)

- // FIXME: Unify this with the other best* functions which are very similar.

- TRACE_EVENT0("input", "EventHandler::bestClickableNodeForHitTestResult");

- ASSERT(result.isRectBasedTest());

- // If the touch is over a scrollbar, don't adjust the touch point since touch adjustment only takes into account

- // DOM nodes so a touch over a scrollbar will be adjusted towards nearby nodes. This leads to things like textarea

- // scrollbars being untouchable.

- if (result.scrollbar()) {

- targetNode = 0;

- return false;

- }

- IntPoint touchCenter = m_frame->view()->contentsToRootFrame(result.roundedPointInMainFrame());

- IntRect touchRect = m_frame->view()->contentsToRootFrame(result.hitTestLocation().boundingBox());

- WillBeHeapVector<RefPtrWillBeMember<Node>, 11> nodes;

- copyToVector(result.listBasedTestResult(), nodes);

- // FIXME: the explicit Vector conversion copies into a temporary and is wasteful.

- return findBestClickableCandidate(targetNode, targetPoint, touchCenter, touchRect, WillBeHeapVector<RefPtrWillBeMember<Node>> (nodes));

-bool EventHandler::bestContextMenuNodeForHitTestResult(const HitTestResult& result, IntPoint& targetPoint, Node*& targetNode)

- ASSERT(result.isRectBasedTest());

- IntPoint touchCenter = m_frame->view()->contentsToRootFrame(result.roundedPointInMainFrame());

- IntRect touchRect = m_frame->view()->contentsToRootFrame(result.hitTestLocation().boundingBox());

- WillBeHeapVector<RefPtrWillBeMember<Node>, 11> nodes;

- copyToVector(result.listBasedTestResult(), nodes);

- // FIXME: the explicit Vector conversion copies into a temporary and is wasteful.

- return findBestContextMenuCandidate(targetNode, targetPoint, touchCenter, touchRect, WillBeHeapVector<RefPtrWillBeMember<Node>>(nodes));

-bool EventHandler::bestZoomableAreaForTouchPoint(const IntPoint& touchCenter, const IntSize& touchRadius, IntRect& targetArea, Node*& targetNode)

- if (touchRadius.isEmpty())

- return false;

- IntPoint hitTestPoint = m_frame->view()->rootFrameToContents(touchCenter);

- HitTestRequest::HitTestRequestType hitType = HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::ListBased;

- HitTestResult result = hitTestResultAtPoint(hitTestPoint, hitType, LayoutSize(touchRadius));

- IntRect touchRect(touchCenter - touchRadius, touchRadius + touchRadius);

- WillBeHeapVector<RefPtrWillBeMember<Node>, 11> nodes;

- copyToVector(result.listBasedTestResult(), nodes);

- // FIXME: the explicit Vector conversion copies into a temporary and is wasteful.

- return findBestZoomableArea(targetNode, targetArea, touchCenter, touchRect, WillBeHeapVector<RefPtrWillBeMember<Node>>(nodes));

-// Update the hover and active state across all frames for this gesture.

-// This logic is different than the mouse case because mice send MouseLeave events to frames as they're exited.

-// With gestures, a single event conceptually both 'leaves' whatever frame currently had hover and enters a new frame

-void EventHandler::updateGestureHoverActiveState(const HitTestRequest& request, Element* innerElement)

- ASSERT(m_frame == m_frame->localFrameRoot());

- WillBeHeapVector<LocalFrame*> newHoverFrameChain;

- LocalFrame* newHoverFrameInDocument = innerElement ? innerElement->document().frame() : nullptr;

- // Insert the ancestors of the frame having the new hovered node to the frame chain

- // The frame chain doesn't include the main frame to avoid the redundant work that cleans the hover state.

- // Because the hover state for the main frame is updated by calling Document::updateHoverActiveState

- while (newHoverFrameInDocument && newHoverFrameInDocument != m_frame) {

- newHoverFrameChain.append(newHoverFrameInDocument);

- Frame* parentFrame = newHoverFrameInDocument->tree().parent();

- newHoverFrameInDocument = parentFrame && parentFrame->isLocalFrame() ? toLocalFrame(parentFrame) : nullptr;

- }

- RefPtrWillBeRawPtr<Node> oldHoverNodeInCurDoc = m_frame->document()->hoverNode();

- RefPtrWillBeRawPtr<Node> newInnermostHoverNode = innerElement;

- if (newInnermostHoverNode != oldHoverNodeInCurDoc) {

- size_t indexFrameChain = newHoverFrameChain.size();

- // Clear the hover state on any frames which are no longer in the frame chain of the hovered elemen

- while (oldHoverNodeInCurDoc && oldHoverNodeInCurDoc->isFrameOwnerElement()) {

- LocalFrame* newHoverFrame = nullptr;

- // If we can't get the frame from the new hover frame chain,

- // the newHoverFrame will be null and the old hover state will be cleared.

- if (indexFrameChain > 0)

- newHoverFrame = newHoverFrameChain[--indexFrameChain];

- HTMLFrameOwnerElement* owner = toHTMLFrameOwnerElement(oldHoverNodeInCurDoc.get());

- if (!owner->contentFrame() || !owner->contentFrame()->isLocalFrame())

- break;

- LocalFrame* oldHoverFrame = toLocalFrame(owner->contentFrame());

- Document* doc = oldHoverFrame->document();

- if (!doc)

- break;

- oldHoverNodeInCurDoc = doc->hoverNode();

- // If the old hovered frame is different from the new hovered frame.

- // we should clear the old hovered node from the old hovered frame.

- if (newHoverFrame != oldHoverFrame)

- doc->updateHoverActiveState(request, nullptr);

- }

- // Recursively set the new active/hover states on every frame in the chain of innerElement.

- m_frame->document()->updateHoverActiveState(request, innerElement);

-GestureEventWithHitTestResults EventHandler::targetGestureEvent(const PlatformGestureEvent& gestureEvent, bool readOnly)

- TRACE_EVENT0("input", "EventHandler::targetGestureEvent");

- ASSERT(m_frame == m_frame->localFrameRoot());

- // Scrolling events get hit tested per frame (like wheel events do).

- ASSERT(!gestureEvent.isScrollEvent());

- HitTestRequest::HitTestRequestType hitType = getHitTypeForGestureType(gestureEvent.type());

- double activeInterval = 0;

- bool shouldKeepActiveForMinInterval = false;

- if (readOnly) {

- hitType |= HitTestRequest::ReadOnly;

- } else if (gestureEvent.type() == PlatformEvent::GestureTap) {

- // If the Tap is received very shortly after ShowPress, we want to

- // delay clearing of the active state so that it's visible to the user

- // for at least a couple of frames.

- activeInterval = WTF::currentTime() - m_lastShowPressTimestamp;

- shouldKeepActiveForMinInterval = m_lastShowPressTimestamp && activeInterval < minimumActiveInterval;

- if (shouldKeepActiveForMinInterval)

- hitType |= HitTestRequest::ReadOnly;

- }

- GestureEventWithHitTestResults eventWithHitTestResults = hitTestResultForGestureEvent(gestureEvent, hitType);

- // Now apply hover/active state to the final target.

- HitTestRequest request(hitType | HitTestRequest::AllowChildFrameContent);

- if (!request.readOnly())

- updateGestureHoverActiveState(request, eventWithHitTestResults.hitTestResult().innerElement());

- if (shouldKeepActiveForMinInterval) {

- m_lastDeferredTapElement = eventWithHitTestResults.hitTestResult().innerElement();

- m_activeIntervalTimer.startOneShot(minimumActiveInterval - activeInterval, FROM_HERE);

- }

- return eventWithHitTestResults;

-GestureEventWithHitTestResults EventHandler::hitTestResultForGestureEvent(const PlatformGestureEvent& gestureEvent, HitTestRequest::HitTestRequestType hitType)

- // Perform the rect-based hit-test (or point-based if adjustment is disabled). Note that

- // we don't yet apply hover/active state here because we need to resolve touch adjustment

- // first so that we apply hover/active it to the final adjusted node.

- IntPoint hitTestPoint = m_frame->view()->rootFrameToContents(gestureEvent.position());

- LayoutSize padding;

- if (shouldApplyTouchAdjustment(gestureEvent)) {

- padding = LayoutSize(gestureEvent.area());

- if (!padding.isEmpty()) {

- padding.scale(1.f / 2);

- hitType |= HitTestRequest::ListBased;

- }

- HitTestResult hitTestResult = hitTestResultAtPoint(hitTestPoint, hitType | HitTestRequest::ReadOnly, padding);

- // Adjust the location of the gesture to the most likely nearby node, as appropriate for the

- // type of event.

- PlatformGestureEvent adjustedEvent = gestureEvent;

- applyTouchAdjustment(&adjustedEvent, &hitTestResult);

- // Do a new hit-test at the (adjusted) gesture co-ordinates. This is necessary because

- // rect-based hit testing and touch adjustment sometimes return a different node than

- // what a point-based hit test would return for the same point.

- // FIXME: Fix touch adjustment to avoid the need for a redundant hit test. http://crbug.com/398914

- if (shouldApplyTouchAdjustment(gestureEvent)) {

- LocalFrame* hitFrame = hitTestResult.innerNodeFrame();

- if (!hitFrame)

- hitFrame = m_frame;

- hitTestResult = hitTestResultInFrame(hitFrame, hitFrame->view()->rootFrameToContents(adjustedEvent.position()), (hitType | HitTestRequest::ReadOnly) & ~HitTestRequest::ListBased);

- }

- // If we did a rect-based hit test it must be resolved to the best single node by now to

- // ensure consumers don't accidentally use one of the other candidates.

- ASSERT(!hitTestResult.isRectBasedTest());

- return GestureEventWithHitTestResults(adjustedEvent, hitTestResult);

-HitTestRequest::HitTestRequestType EventHandler::getHitTypeForGestureType(PlatformEvent::Type type)

- HitTestRequest::HitTestRequestType hitType = HitTestRequest::TouchEvent;

- switch (type) {

- case PlatformEvent::GestureShowPress:

- case PlatformEvent::GestureTapUnconfirmed:

- return hitType | HitTestRequest::Active;

- case PlatformEvent::GestureTapDownCancel:

- // A TapDownCancel received when no element is active shouldn't really be changing hover state.

- if (!m_frame->document()->activeHoverElement())

- hitType |= HitTestRequest::ReadOnly;

- return hitType | HitTestRequest::Release;

- case PlatformEvent::GestureTap:

- return hitType | HitTestRequest::Release;

- case PlatformEvent::GestureTapDown:

- case PlatformEvent::GestureLongPress:

- case PlatformEvent::GestureLongTap:

- case PlatformEvent::GestureTwoFingerTap:

- // FIXME: Shouldn't LongTap and TwoFingerTap clear the Active state?

- return hitType | HitTestRequest::Active | HitTestRequest::ReadOnly;

- default:

- ASSERT_NOT_REACHED();

- return hitType | HitTestRequest::Active | HitTestRequest::ReadOnly;

- }

-void EventHandler::applyTouchAdjustment(PlatformGestureEvent* gestureEvent, HitTestResult* hitTestResult)

- if (!shouldApplyTouchAdjustment(*gestureEvent))

- return;

- Node* adjustedNode = nullptr;

- IntPoint adjustedPoint = gestureEvent->position();

- bool adjusted = false;

- switch (gestureEvent->type()) {

- case PlatformEvent::GestureTap:

- case PlatformEvent::GestureTapUnconfirmed:

- case PlatformEvent::GestureTapDown:

- case PlatformEvent::GestureShowPress:

- adjusted = bestClickableNodeForHitTestResult(*hitTestResult, adjustedPoint, adjustedNode);

- break;

- case PlatformEvent::GestureLongPress:

- case PlatformEvent::GestureLongTap:

- case PlatformEvent::GestureTwoFingerTap:

- adjusted = bestContextMenuNodeForHitTestResult(*hitTestResult, adjustedPoint, adjustedNode);

- break;

- default:

- ASSERT_NOT_REACHED();

- }

- // Update the hit-test result to be a point-based result instead of a rect-based result.

- // FIXME: We should do this even when no candidate matches the node filter. crbug.com/398914

- if (adjusted) {

- hitTestResult->resolveRectBasedTest(adjustedNode, m_frame->view()->rootFrameToContents(adjustedPoint));

- gestureEvent->applyTouchAdjustment(adjustedPoint);

- }

-bool EventHandler::sendContextMenuEvent(const PlatformMouseEvent& event, Node* overrideTargetNode)

- FrameView* v = m_frame->view();

- if (!v)

- return false;

- // Clear mouse press state to avoid initiating a drag while context menu is up.

- m_mousePressed = false;

- LayoutPoint positionInContents = v->rootFrameToContents(event.position());

- HitTestRequest request(HitTestRequest::Active);

- MouseEventWithHitTestResults mev = m_frame->document()->prepareMouseEvent(request, positionInContents, event);

- if (!m_frame->selection().contains(positionInContents)

- && !mev.scrollbar()

- // FIXME: In the editable case, word selection sometimes selects content that isn't underneath the mouse.

- // If the selection is non-editable, we do word selection to make it easier to use the contextual menu items

- // available for text selections. But only if we're above text.

- && (m_frame->selection().isContentEditable() || (mev.innerNode() && mev.innerNode()->isTextNode()))) {

- m_mouseDownMayStartSelect = true; // context menu events are always allowed to perform a selection

- if (mev.hitTestResult().isMisspelled())

- selectClosestMisspellingFromMouseEvent(mev);

- else if (m_frame->editor().behavior().shouldSelectOnContextualMenuClick())

- selectClosestWordOrLinkFromMouseEvent(mev);

- }

- Node* targetNode = overrideTargetNode ? overrideTargetNode : mev.innerNode();

- return !dispatchMouseEvent(EventTypeNames::contextmenu, targetNode, 0, event, false);

-bool EventHandler::sendContextMenuEventForKey(Element* overrideTargetElement)

- FrameView* view = m_frame->view();

- if (!view)

- return false;

- Document* doc = m_frame->document();

- if (!doc)

- return false;

- // Clear mouse press state to avoid initiating a drag while context menu is up.

- m_mousePressed = false;

- static const int kContextMenuMargin = 1;

-#if OS(WIN)

- int rightAligned = ::GetSystemMetrics(SM_MENUDROPALIGNMENT);

-#else

- int rightAligned = 0;

-#endif

- IntPoint locationInRootFrame;

- Element* focusedElement = overrideTargetElement ? overrideTargetElement : doc->focusedElement();

- FrameSelection& selection = m_frame->selection();

- Position start = selection.selection().start();

- PinchViewport& pinchViewport = m_frame->page()->frameHost().pinchViewport();

- if (!overrideTargetElement && start.deprecatedNode() && (selection.rootEditableElement() || selection.isRange())) {

- RefPtrWillBeRawPtr<Range> selectionRange = selection.toNormalizedRange();

- IntRect firstRect = m_frame->editor().firstRectForRange(selectionRange.get());

- int x = rightAligned ? firstRect.maxX() : firstRect.x();

- // In a multiline edit, firstRect.maxY() would endup on the next line, so -1.

- int y = firstRect.maxY() ? firstRect.maxY() - 1 : 0;

- locationInRootFrame = view->contentsToRootFrame(IntPoint(x, y));

- } else if (focusedElement) {

- IntRect clippedRect = focusedElement->boundsInViewportSpace();

- // FIXME: boundsInViewportSpace is actually in the weird scaled but untranslated coordinate space of

- // the old-style pinch viewport. crbug.com/459591.

- locationInRootFrame = flooredIntPoint(pinchViewport.viewportCSSPixelsToRootFrame(clippedRect.center()));

- } else {

- locationInRootFrame = IntPoint(

- rightAligned

- ? pinchViewport.visibleRect().maxX() - kContextMenuMargin

- : pinchViewport.location().x() + kContextMenuMargin,

- pinchViewport.location().y() + kContextMenuMargin);

- }

- m_frame->view()->setCursor(pointerCursor());

- IntPoint locationInViewport = pinchViewport.rootFrameToViewport(locationInRootFrame);

- IntPoint globalPosition = view->hostWindow()->viewportToScreen(IntRect(locationInViewport, IntSize())).location();

- Node* targetNode = overrideTargetElement ? overrideTargetElement : doc->focusedElement();

- if (!targetNode)

- targetNode = doc;

- // Use the focused node as the target for hover and active.

- HitTestRequest request(HitTestRequest::Active);

- HitTestResult result(request, locationInRootFrame);

- result.setInnerNode(targetNode);

- doc->updateHoverActiveState(request, result.innerElement());

- // The contextmenu event is a mouse event even when invoked using the keyboard.

- // This is required for web compatibility.

- PlatformEvent::Type eventType = PlatformEvent::MousePressed;

- if (m_frame->settings()->showContextMenuOnMouseUp())

- eventType = PlatformEvent::MouseReleased;

- PlatformMouseEvent mouseEvent(locationInRootFrame, globalPosition, RightButton, eventType, 1, false, false, false, false, PlatformMouseEvent::RealOrIndistinguishable, WTF::currentTime());

- handleMousePressEvent(mouseEvent);

- return sendContextMenuEvent(mouseEvent, overrideTargetElement);

-bool EventHandler::sendContextMenuEventForGesture(const GestureEventWithHitTestResults& targetedEvent)

- const PlatformGestureEvent& gestureEvent = targetedEvent.event();

- unsigned modifiers = gestureEvent.modifiers();

- // Send MouseMoved event prior to handling (https://crbug.com/485290).

- PlatformMouseEvent fakeMouseMove(gestureEvent.position(), gestureEvent.globalPosition(),

- NoButton, PlatformEvent::MouseMoved, /* clickCount */ 0,

- static_cast<PlatformEvent::Modifiers>(modifiers),

- PlatformMouseEvent::FromTouch, gestureEvent.timestamp());

- dispatchMouseEvent(EventTypeNames::mousemove, targetedEvent.hitTestResult().innerNode(), 0, fakeMouseMove, true);

- PlatformEvent::Type eventType = PlatformEvent::MousePressed;

- if (m_frame->settings()->showContextMenuOnMouseUp())

- eventType = PlatformEvent::MouseReleased;

- else

- modifiers |= PlatformEvent::RightButtonDown;

- PlatformMouseEvent mouseEvent(targetedEvent.event().position(), targetedEvent.event().globalPosition(), RightButton, eventType, 1,

- static_cast<PlatformEvent::Modifiers>(modifiers),

- PlatformMouseEvent::FromTouch, WTF::currentTime());

- // To simulate right-click behavior, we send a right mouse down and then

- // context menu event.

- // FIXME: Send HitTestResults to avoid redundant hit tests.

- handleMousePressEvent(mouseEvent);

- return sendContextMenuEvent(mouseEvent);

- // We do not need to send a corresponding mouse release because in case of

- // right-click, the context menu takes capture and consumes all events.

-void EventHandler::scheduleHoverStateUpdate()

- if (!m_hoverTimer.isActive())

- m_hoverTimer.startOneShot(0, FROM_HERE);

-void EventHandler::scheduleCursorUpdate()

- // We only want one timer for the page, rather than each frame having it's own timer

- // competing which eachother (since there's only one mouse cursor).

- ASSERT(m_frame == m_frame->localFrameRoot());

- if (!m_cursorUpdateTimer.isActive())

- m_cursorUpdateTimer.startOneShot(cursorUpdateInterval, FROM_HERE);

-bool EventHandler::cursorUpdatePending()

- return m_cursorUpdateTimer.isActive();

-void EventHandler::dispatchFakeMouseMoveEventSoon()

- if (m_mousePressed)

- return;

- if (m_mousePositionIsUnknown)

- return;

- Settings* settings = m_frame->settings();

- if (settings && !settings->deviceSupportsMouse())

- return;

- // If the content has ever taken longer than fakeMouseMoveShortInterval we

- // reschedule the timer and use a longer time. This will cause the content

- // to receive these moves only after the user is done scrolling, reducing

- // pauses during the scroll.

- if (m_maxMouseMovedDuration > fakeMouseMoveShortInterval) {

- if (m_fakeMouseMoveEventTimer.isActive())

- m_fakeMouseMoveEventTimer.stop();

- m_fakeMouseMoveEventTimer.startOneShot(fakeMouseMoveLongInterval, FROM_HERE);

- } else {

- if (!m_fakeMouseMoveEventTimer.isActive())

- m_fakeMouseMoveEventTimer.startOneShot(fakeMouseMoveShortInterval, FROM_HERE);

- }

-void EventHandler::dispatchFakeMouseMoveEventSoonInQuad(const FloatQuad& quad)

- FrameView* view = m_frame->view();

- if (!view)

- return;

- if (!quad.containsPoint(view->rootFrameToContents(m_lastKnownMousePosition)))

- return;

- dispatchFakeMouseMoveEventSoon();

-void EventHandler::fakeMouseMoveEventTimerFired(Timer<EventHandler>* timer)

- TRACE_EVENT0("input", "EventHandler::fakeMouseMoveEventTimerFired");

- ASSERT_UNUSED(timer, timer == &m_fakeMouseMoveEventTimer);

- ASSERT(!m_mousePressed);

- Settings* settings = m_frame->settings();

- if (settings && !settings->deviceSupportsMouse())

- return;

- FrameView* view = m_frame->view();

- if (!view)

- return;

- if (!m_frame->page() || !m_frame->page()->focusController().isActive())

- return;

- // Don't dispatch a synthetic mouse move event if the mouse cursor is not visible to the user.

- if (!isCursorVisible())

- return;

- bool shiftKey;

- bool ctrlKey;

- bool altKey;

- bool metaKey;

- PlatformKeyboardEvent::getCurrentModifierState(shiftKey, ctrlKey, altKey, metaKey);

- PlatformMouseEvent fakeMouseMoveEvent(m_lastKnownMousePosition, m_lastKnownMouseGlobalPosition, NoButton, PlatformEvent::MouseMoved, 0, shiftKey, ctrlKey, altKey, metaKey, PlatformMouseEvent::RealOrIndistinguishable, currentTime());

- handleMouseMoveEvent(fakeMouseMoveEvent);

-void EventHandler::cancelFakeMouseMoveEvent()

- m_fakeMouseMoveEventTimer.stop();

-bool EventHandler::isCursorVisible() const

- return m_frame->page()->isCursorVisible();

-void EventHandler::setResizingFrameSet(HTMLFrameSetElement* frameSet)

- m_frameSetBeingResized = frameSet;

-void EventHandler::resizeScrollableAreaDestroyed()

- ASSERT(m_resizeScrollableArea);

- m_resizeScrollableArea = nullptr;

-void EventHandler::hoverTimerFired(Timer<EventHandler>*)

- TRACE_EVENT0("input", "EventHandler::hoverTimerFired");

- m_hoverTimer.stop();

- ASSERT(m_frame);

- ASSERT(m_frame->document());

- if (LayoutView* layoutObject = m_frame->contentLayoutObject()) {

- if (FrameView* view = m_frame->view()) {

- HitTestRequest request(HitTestRequest::Move);

- HitTestResult result(request, view->rootFrameToContents(m_lastKnownMousePosition));

- layoutObject->hitTest(result);

- m_frame->document()->updateHoverActiveState(request, result.innerElement());

- }

-void EventHandler::activeIntervalTimerFired(Timer<EventHandler>*)

- TRACE_EVENT0("input", "EventHandler::activeIntervalTimerFired");

- m_activeIntervalTimer.stop();

- if (m_frame

- && m_frame->document()

- && m_lastDeferredTapElement) {

- // FIXME: Enable condition when http://crbug.com/226842 lands

- // m_lastDeferredTapElement.get() == m_frame->document()->activeElement()

- HitTestRequest request(HitTestRequest::TouchEvent | HitTestRequest::Release);

- m_frame->document()->updateHoverActiveState(request, m_lastDeferredTapElement.get());

- }

- m_lastDeferredTapElement = nullptr;

-void EventHandler::notifyElementActivated()

- // Since another element has been set to active, stop current timer and clear reference.

- if (m_activeIntervalTimer.isActive())

- m_activeIntervalTimer.stop();

- m_lastDeferredTapElement = nullptr;

-bool EventHandler::handleAccessKey(const PlatformKeyboardEvent& evt)

- // FIXME: Ignoring the state of Shift key is what neither IE nor Firefox do.

- // IE matches lower and upper case access keys regardless of Shift key state - but if both upper and

- // lower case variants are present in a document, the correct element is matched based on Shift key state.

- // Firefox only matches an access key if Shift is not pressed, and does that case-insensitively.

- ASSERT(!(accessKeyModifiers() & PlatformEvent::ShiftKey));

- if ((evt.modifiers() & ~PlatformEvent::ShiftKey) != accessKeyModifiers())

- return false;

- String key = evt.unmodifiedText();

- Element* elem = m_frame->document()->getElementByAccessKey(key.lower());

- if (!elem)

- return false;

- elem->accessKeyAction(false);

- return true;

-bool EventHandler::keyEvent(const PlatformKeyboardEvent& initialKeyEvent)

- RefPtrWillBeRawPtr<FrameView> protector(m_frame->view());

- if (initialKeyEvent.windowsVirtualKeyCode() == VK_CAPITAL)

- capsLockStateMayHaveChanged();

-#if OS(WIN)

- if (panScrollInProgress()) {

- // If a key is pressed while the panScroll is in progress then we want to stop

- if (initialKeyEvent.type() == PlatformEvent::KeyDown || initialKeyEvent.type() == PlatformEvent::RawKeyDown)

- stopAutoscroll();

- // If we were in panscroll mode, we swallow the key event

- return true;

- }

-#endif

- // Check for cases where we are too early for events -- possible unmatched key up

- // from pressing return in the location bar.

- RefPtrWillBeRawPtr<Node> node = eventTargetNodeForDocument(m_frame->document());

- if (!node)

- return false;

- UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);

- // In IE, access keys are special, they are handled after default keydown processing, but cannot be canceled - this is hard to match.

- // On Mac OS X, we process them before dispatching keydown, as the default keydown handler implements Emacs key bindings, which may conflict

- // with access keys. Then we dispatch keydown, but suppress its default handling.

- // On Windows, WebKit explicitly calls handleAccessKey() instead of dispatching a keypress event for WM_SYSCHAR messages.

- // Other platforms currently match either Mac or Windows behavior, depending on whether they send combined KeyDown events.

- bool matchedAnAccessKey = false;

- if (initialKeyEvent.type() == PlatformEvent::KeyDown)

- matchedAnAccessKey = handleAccessKey(initialKeyEvent);

- // FIXME: it would be fair to let an input method handle KeyUp events before DOM dispatch.

- if (initialKeyEvent.type() == PlatformEvent::KeyUp || initialKeyEvent.type() == PlatformEvent::Char)

- return !node->dispatchKeyEvent(initialKeyEvent);

- PlatformKeyboardEvent keyDownEvent = initialKeyEvent;

- if (keyDownEvent.type() != PlatformEvent::RawKeyDown)

- keyDownEvent.disambiguateKeyDownEvent(PlatformEvent::RawKeyDown);

- RefPtrWillBeRawPtr<KeyboardEvent> keydown = KeyboardEvent::create(keyDownEvent, m_frame->document()->domWindow());

- if (matchedAnAccessKey)

- keydown->setDefaultPrevented(true);

- keydown->setTarget(node);

- if (initialKeyEvent.type() == PlatformEvent::RawKeyDown) {

- node->dispatchEvent(keydown, IGNORE_EXCEPTION);

- // If frame changed as a result of keydown dispatch, then return true to avoid sending a subsequent keypress message to the new frame.

- bool changedFocusedFrame = m_frame->page() && m_frame != m_frame->page()->focusController().focusedOrMainFrame();

- return keydown->defaultHandled() || keydown->defaultPrevented() || changedFocusedFrame;

- }

- node->dispatchEvent(keydown, IGNORE_EXCEPTION);

- // If frame changed as a result of keydown dispatch, then return early to avoid sending a subsequent keypress message to the new frame.

- bool changedFocusedFrame = m_frame->page() && m_frame != m_frame->page()->focusController().focusedOrMainFrame();

- bool keydownResult = keydown->defaultHandled() || keydown->defaultPrevented() || changedFocusedFrame;

- if (keydownResult)

- return keydownResult;

- // Focus may have changed during keydown handling, so refetch node.

- // But if we are dispatching a fake backward compatibility keypress, then we pretend that the keypress happened on the original node.

- node = eventTargetNodeForDocument(m_frame->document());

- if (!node)

- return false;

- PlatformKeyboardEvent keyPressEvent = initialKeyEvent;

- keyPressEvent.disambiguateKeyDownEvent(PlatformEvent::Char);

- if (keyPressEvent.text().isEmpty())

- return keydownResult;

- RefPtrWillBeRawPtr<KeyboardEvent> keypress = KeyboardEvent::create(keyPressEvent, m_frame->document()->domWindow());

- keypress->setTarget(node);

- if (keydownResult)

- keypress->setDefaultPrevented(true);

- node->dispatchEvent(keypress, IGNORE_EXCEPTION);

- return keydownResult || keypress->defaultPrevented() || keypress->defaultHandled();

-static WebFocusType focusDirectionForKey(const AtomicString& keyIdentifier)

- DEFINE_STATIC_LOCAL(AtomicString, Down, ("Down", AtomicString::ConstructFromLiteral));

- DEFINE_STATIC_LOCAL(AtomicString, Up, ("Up", AtomicString::ConstructFromLiteral));

- DEFINE_STATIC_LOCAL(AtomicString, Left, ("Left", AtomicString::ConstructFromLiteral));

- DEFINE_STATIC_LOCAL(AtomicString, Right, ("Right", AtomicString::ConstructFromLiteral));

- WebFocusType retVal = WebFocusTypeNone;

- if (keyIdentifier == Down)

- retVal = WebFocusTypeDown;

- else if (keyIdentifier == Up)

- retVal = WebFocusTypeUp;

- else if (keyIdentifier == Left)

- retVal = WebFocusTypeLeft;

- else if (keyIdentifier == Right)

- retVal = WebFocusTypeRight;

- return retVal;

-void EventHandler::defaultKeyboardEventHandler(KeyboardEvent* event)

- if (event->type() == EventTypeNames::keydown) {

- // Clear caret blinking suspended state to make sure that caret blinks

- // when we type again after long pressing on an empty input field.

- if (m_frame && m_frame->selection().isCaretBlinkingSuspended())

- m_frame->selection().setCaretBlinkingSuspended(false);

- m_frame->editor().handleKeyboardEvent(event);

- if (event->defaultHandled())

- return;

- if (event->keyIdentifier() == "U+0009") {

- defaultTabEventHandler(event);

- } else if (event->keyIdentifier() == "U+0008") {

- defaultBackspaceEventHandler(event);

- } else if (event->keyIdentifier() == "U+001B") {

- defaultEscapeEventHandler(event);

- } else {

- WebFocusType type = focusDirectionForKey(AtomicString(event->keyIdentifier()));

- if (type != WebFocusTypeNone)

- defaultArrowEventHandler(type, event);

- }

- if (event->type() == EventTypeNames::keypress) {

- m_frame->editor().handleKeyboardEvent(event);

- if (event->defaultHandled())

- return;

- if (event->charCode() == ' ')

- defaultSpaceEventHandler(event);

- }

-bool EventHandler::dragHysteresisExceeded(const IntPoint& dragLocationInRootFrame) const

- FrameView* view = m_frame->view();

- if (!view)

- return false;

- IntPoint dragLocation = view->rootFrameToContents(dragLocationInRootFrame);

- IntSize delta = dragLocation - m_mouseDownPos;

- int threshold = GeneralDragHysteresis;

- switch (dragState().m_dragType) {

- case DragSourceActionSelection:

- threshold = TextDragHysteresis;

- break;

- case DragSourceActionImage:

- threshold = ImageDragHysteresis;

- break;

- case DragSourceActionLink:

- threshold = LinkDragHysteresis;

- break;

- case DragSourceActionDHTML:

- break;

- case DragSourceActionNone:

- ASSERT_NOT_REACHED();

- }

- return abs(delta.width()) >= threshold || abs(delta.height()) >= threshold;

-void EventHandler::clearDragDataTransfer()

- if (dragState().m_dragDataTransfer) {

- dragState().m_dragDataTransfer->clearDragImage();

- dragState().m_dragDataTransfer->setAccessPolicy(DataTransferNumb);

- }

-void EventHandler::dragSourceEndedAt(const PlatformMouseEvent& event, DragOperation operation)

- // Send a hit test request so that Layer gets a chance to update the :hover and :active pseudoclasses.

- HitTestRequest request(HitTestRequest::Release);

- prepareMouseEvent(request, event);

- if (dragState().m_dragSrc) {

- dragState().m_dragDataTransfer->setDestinationOperation(operation);

- // for now we don't care if event handler cancels default behavior, since there is none

- dispatchDragSrcEvent(EventTypeNames::dragend, event);

- }

- clearDragDataTransfer();

- dragState().m_dragSrc = nullptr;

- // In case the drag was ended due to an escape key press we need to ensure

- // that consecutive mousemove events don't reinitiate the drag and drop.

- m_mouseDownMayStartDrag = false;

-void EventHandler::updateDragStateAfterEditDragIfNeeded(Element* rootEditableElement)

- // If inserting the dragged contents removed the drag source, we still want to fire dragend at the root editble element.

- if (dragState().m_dragSrc && !dragState().m_dragSrc->inDocument())

- dragState().m_dragSrc = rootEditableElement;

-// returns if we should continue "default processing", i.e., whether eventhandler canceled

-bool EventHandler::dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent& event)

- return !dispatchDragEvent(eventType, dragState().m_dragSrc.get(), event, dragState().m_dragDataTransfer.get());

-bool EventHandler::handleDrag(const MouseEventWithHitTestResults& event, DragInitiator initiator)

- ASSERT(event.event().type() == PlatformEvent::MouseMoved);

- // Callers must protect the reference to FrameView, since this function may dispatch DOM

- // events, causing page/FrameView to go away.

- ASSERT(m_frame);

- ASSERT(m_frame->view());

- if (!m_frame->page())

- return false;

- if (m_mouseDownMayStartDrag) {

- HitTestRequest request(HitTestRequest::ReadOnly);

- HitTestResult result(request, m_mouseDownPos);

- m_frame->contentLayoutObject()->hitTest(result);

- Node* node = result.innerNode();

- if (node) {

- DragController::SelectionDragPolicy selectionDragPolicy = event.event().timestamp() - m_mouseDownTimestamp < TextDragDelay

- ? DragController::DelayedSelectionDragResolution

- : DragController::ImmediateSelectionDragResolution;

- dragState().m_dragSrc = m_frame->page()->dragController().draggableNode(m_frame, node, m_mouseDownPos, selectionDragPolicy, dragState().m_dragType);

- } else {

- dragState().m_dragSrc = nullptr;

- }

- if (!dragState().m_dragSrc)

- m_mouseDownMayStartDrag = false; // no element is draggable

- }

- if (!m_mouseDownMayStartDrag)

- return initiator == DragInitiator::Mouse && !mouseDownMayStartSelect() && !m_mouseDownMayStartAutoscroll;

- // We are starting a text/image/url drag, so the cursor should be an arrow

- // FIXME <rdar://7577595>: Custom cursors aren't supported during drag and drop (default to pointer).

- m_frame->view()->setCursor(pointerCursor());

- if (initiator == DragInitiator::Mouse && !dragHysteresisExceeded(event.event().position()))

- return true;

- // Once we're past the hysteresis point, we don't want to treat this gesture as a click

- invalidateClick();

- if (!tryStartDrag(event)) {

- // Something failed to start the drag, clean up.

- clearDragDataTransfer();

- dragState().m_dragSrc = nullptr;

- }

- m_mouseDownMayStartDrag = false;

- // Whether or not the drag actually started, no more default handling (like selection).

- return true;

-bool EventHandler::tryStartDrag(const MouseEventWithHitTestResults& event)

- // The DataTransfer would only be non-empty if we missed a dragEnd.

- // Clear it anyway, just to make sure it gets numbified.

- clearDragDataTransfer();

- dragState().m_dragDataTransfer = createDraggingDataTransfer();

- // Check to see if this a DOM based drag, if it is get the DOM specified drag

- // image and offset

- if (dragState().m_dragType == DragSourceActionDHTML) {

- if (LayoutObject* layoutObject = dragState().m_dragSrc->layoutObject()) {

- FloatPoint absPos = layoutObject->localToAbsolute(FloatPoint(), UseTransforms);

- IntSize delta = m_mouseDownPos - roundedIntPoint(absPos);

- dragState().m_dragDataTransfer->setDragImageElement(dragState().m_dragSrc.get(), IntPoint(delta));

- } else {

- // The layoutObject has disappeared, this can happen if the onStartDrag handler has hidden

- // the element in some way. In this case we just kill the drag.

- return false;

- }

- DragController& dragController = m_frame->page()->dragController();

- if (!dragController.populateDragDataTransfer(m_frame, dragState(), m_mouseDownPos))

- return false;

- // If dispatching dragstart brings about another mouse down -- one way

- // this will happen is if a DevTools user breaks within a dragstart

- // handler and then clicks on the suspended page -- the drag state is

- // reset. Hence, need to check if this particular drag operation can

- // continue even if dispatchEvent() indicates no (direct) cancellation.

- // Do that by checking if m_dragSrc is still set.

- m_mouseDownMayStartDrag = dispatchDragSrcEvent(EventTypeNames::dragstart, m_mouseDown)

- && !m_frame->selection().isInPasswordField() && dragState().m_dragSrc;

- // Invalidate clipboard here against anymore pasteboard writing for security. The drag

- // image can still be changed as we drag, but not the pasteboard data.

- dragState().m_dragDataTransfer->setAccessPolicy(DataTransferImageWritable);

- if (m_mouseDownMayStartDrag) {

- // Dispatching the event could cause Page to go away. Make sure it's still valid before trying to use DragController.

- if (m_frame->page() && dragController.startDrag(m_frame, dragState(), event.event(), m_mouseDownPos))

- return true;

- // Drag was canned at the last minute - we owe m_dragSrc a DRAGEND event

- dispatchDragSrcEvent(EventTypeNames::dragend, event.event());

- }

- return false;

-bool EventHandler::handleTextInputEvent(const String& text, Event* underlyingEvent, TextEventInputType inputType)

- // Platforms should differentiate real commands like selectAll from text input in disguise (like insertNewline),

- // and avoid dispatching text input events from keydown default handlers.

- ASSERT(!underlyingEvent || !underlyingEvent->isKeyboardEvent() || toKeyboardEvent(underlyingEvent)->type() == EventTypeNames::keypress);

- if (!m_frame)

- return false;

- EventTarget* target;

- if (underlyingEvent)

- target = underlyingEvent->target();

- else

- target = eventTargetNodeForDocument(m_frame->document());

- if (!target)

- return false;

- RefPtrWillBeRawPtr<TextEvent> event = TextEvent::create(m_frame->domWindow(), text, inputType);

- event->setUnderlyingEvent(underlyingEvent);

- target->dispatchEvent(event, IGNORE_EXCEPTION);

- return event->defaultHandled();

-void EventHandler::defaultTextInputEventHandler(TextEvent* event)

- if (m_frame->editor().handleTextEvent(event))

- event->setDefaultHandled();

-void EventHandler::defaultSpaceEventHandler(KeyboardEvent* event)

- ASSERT(event->type() == EventTypeNames::keypress);

- if (event->ctrlKey() || event->metaKey() || event->altKey())

- return;

- ScrollDirection direction = event->shiftKey() ? ScrollBlockDirectionBackward : ScrollBlockDirectionForward;

- // FIXME: enable scroll customization in this case. See crbug.com/410974.

- if (scroll(direction, ScrollByPage)) {

- event->setDefaultHandled();

- return;

- }

- FrameView* view = m_frame->view();

- if (!view)

- return;

- ScrollDirectionPhysical physicalDirection =

- toPhysicalDirection(direction, view->isVerticalDocument(), view->isFlippedDocument());

- if (view->scrollableArea()->userScroll(physicalDirection, ScrollByPage))

- event->setDefaultHandled();

-void EventHandler::defaultBackspaceEventHandler(KeyboardEvent* event)

- ASSERT(event->type() == EventTypeNames::keydown);

- if (event->ctrlKey() || event->metaKey() || event->altKey())

- return;

- if (!m_frame->editor().behavior().shouldNavigateBackOnBackspace())

- return;

- bool handledEvent = m_frame->loader().client()->navigateBackForward(event->shiftKey() ? 1 : -1);

- if (handledEvent)

- event->setDefaultHandled();

-void EventHandler::defaultArrowEventHandler(WebFocusType focusType, KeyboardEvent* event)

- ASSERT(event->type() == EventTypeNames::keydown);

- if (event->ctrlKey() || event->metaKey() || event->shiftKey())

- return;

- Page* page = m_frame->page();

- if (!page)

- return;

- if (!isSpatialNavigationEnabled(m_frame))

- return;

- // Arrows and other possible directional navigation keys can be used in design

- // mode editing.

- if (m_frame->document()->inDesignMode())

- return;

- if (page->focusController().advanceFocus(focusType))

- event->setDefaultHandled();

-void EventHandler::defaultTabEventHandler(KeyboardEvent* event)

- ASSERT(event->type() == EventTypeNames::keydown);

- // We should only advance focus on tabs if no special modifier keys are held down.

- if (event->ctrlKey() || event->metaKey())

- return;

-#if !OS(MACOSX)

- // Option-Tab is a shortcut based on a system-wide preference on Mac but

- // should be ignored on all other platforms.

- if (event->altKey())

- return;

-#endif

- Page* page = m_frame->page();

- if (!page)

- return;

- if (!page->tabKeyCyclesThroughElements())

- return;

- WebFocusType focusType = event->shiftKey() ? WebFocusTypeBackward : WebFocusTypeForward;

- // Tabs can be used in design mode editing.

- if (m_frame->document()->inDesignMode())

- return;

- if (page->focusController().advanceFocus(focusType))

- event->setDefaultHandled();

-void EventHandler::defaultEscapeEventHandler(KeyboardEvent* event)

- if (HTMLDialogElement* dialog = m_frame->document()->activeModalDialog())

- dialog->dispatchEvent(Event::createCancelable(EventTypeNames::cancel));

-void EventHandler::capsLockStateMayHaveChanged()

- if (Element* element = m_frame->document()->focusedElement()) {

- if (LayoutObject* r = element->layoutObject()) {

- if (r->isTextField())

- toLayoutTextControlSingleLine(r)->capsLockStateMayHaveChanged();

- }

-void EventHandler::setFrameWasScrolledByUser()

- if (FrameView* view = m_frame->view())

- view->setWasScrolledByUser(true);

-bool EventHandler::passMousePressEventToScrollbar(MouseEventWithHitTestResults& mev)

- Scrollbar* scrollbar = mev.scrollbar();

- updateLastScrollbarUnderMouse(scrollbar, true);

- if (!scrollbar || !scrollbar->enabled())

- return false;

- setFrameWasScrolledByUser();

- scrollbar->mouseDown(mev.event());

- return true;

-// If scrollbar (under mouse) is different from last, send a mouse exited. Set

-// last to scrollbar if setLast is true; else set last to 0.

-void EventHandler::updateLastScrollbarUnderMouse(Scrollbar* scrollbar, bool setLast)

- if (m_lastScrollbarUnderMouse != scrollbar) {

- // Send mouse exited to the old scrollbar.

- if (m_lastScrollbarUnderMouse)

- m_lastScrollbarUnderMouse->mouseExited();

- // Send mouse entered if we're setting a new scrollbar.

- if (scrollbar && setLast)

- scrollbar->mouseEntered();

- m_lastScrollbarUnderMouse = setLast ? scrollbar : nullptr;

- }

-static const AtomicString& eventNameForTouchPointState(PlatformTouchPoint::State state)

- switch (state) {

- case PlatformTouchPoint::TouchReleased:

- return EventTypeNames::touchend;

- case PlatformTouchPoint::TouchCancelled:

- return EventTypeNames::touchcancel;

- case PlatformTouchPoint::TouchPressed:

- return EventTypeNames::touchstart;

- case PlatformTouchPoint::TouchMoved:

- return EventTypeNames::touchmove;

- case PlatformTouchPoint::TouchStationary:

- // TouchStationary state is not converted to touch events, so fall through to assert.

- default:

- ASSERT_NOT_REACHED();

- return emptyAtom;

- }

-HitTestResult EventHandler::hitTestResultInFrame(LocalFrame* frame, const LayoutPoint& point, HitTestRequest::HitTestRequestType hitType)

- HitTestResult result(HitTestRequest(hitType), point);

- if (!frame || !frame->contentLayoutObject())

- return result;

- if (frame->view()) {

- IntRect rect = frame->view()->visibleContentRect(IncludeScrollbars);

- if (!rect.contains(roundedIntPoint(point)))

- return result;

- }

- frame->contentLayoutObject()->hitTest(result);

- return result;

-bool EventHandler::handleTouchEvent(const PlatformTouchEvent& event)

- TRACE_EVENT0("blink", "EventHandler::handleTouchEvent");

- const Vector<PlatformTouchPoint>& points = event.touchPoints();

- unsigned i;

- bool freshTouchEvents = true;

- bool allTouchReleased = true;

- for (i = 0; i < points.size(); ++i) {

- const PlatformTouchPoint& point = points[i];

- if (point.state() != PlatformTouchPoint::TouchPressed)

- freshTouchEvents = false;

- if (point.state() != PlatformTouchPoint::TouchReleased && point.state() != PlatformTouchPoint::TouchCancelled)

- allTouchReleased = false;

- }

- if (freshTouchEvents) {

- // Ideally we'd ASSERT !m_touchSequenceDocument here since we should

- // have cleared the active document when we saw the last release. But we

- // have some tests that violate this, ClusterFuzz could trigger it, and

- // there may be cases where the browser doesn't reliably release all

- // touches. http://crbug.com/345372 tracks this.

- m_touchSequenceDocument.clear();

- m_touchSequenceUserGestureToken.clear();

- }

- OwnPtr<UserGestureIndicator> gestureIndicator;

- if (m_touchSequenceUserGestureToken)

- gestureIndicator = adoptPtr(new UserGestureIndicator(m_touchSequenceUserGestureToken.release()));

- else

- gestureIndicator = adoptPtr(new UserGestureIndicator(DefinitelyProcessingUserGesture));

- m_touchSequenceUserGestureToken = gestureIndicator->currentToken();

- ASSERT(m_frame->view());

- if (m_touchSequenceDocument && (!m_touchSequenceDocument->frame() || !m_touchSequenceDocument->frame()->view())) {

- // If the active touch document has no frame or view, it's probably being destroyed

- // so we can't dispatch events.

- return false;

- }

- // First do hit tests for any new touch points.

- for (i = 0; i < points.size(); ++i) {

- const PlatformTouchPoint& point = points[i];

- // Touch events implicitly capture to the touched node, and don't change

- // active/hover states themselves (Gesture events do). So we only need

- // to hit-test on touchstart, and it can be read-only.

- if (point.state() == PlatformTouchPoint::TouchPressed) {

- HitTestRequest::HitTestRequestType hitType = HitTestRequest::TouchEvent | HitTestRequest::ReadOnly | HitTestRequest::Active;

- LayoutPoint pagePoint = roundedLayoutPoint(m_frame->view()->rootFrameToContents(point.pos()));

- HitTestResult result;

- if (!m_touchSequenceDocument) {

- result = hitTestResultAtPoint(pagePoint, hitType);

- } else if (m_touchSequenceDocument->frame()) {

- LayoutPoint framePoint = roundedLayoutPoint(m_touchSequenceDocument->frame()->view()->rootFrameToContents(point.pos()));

- result = hitTestResultInFrame(m_touchSequenceDocument->frame(), framePoint, hitType);

- } else {

- continue;

- }

- Node* node = result.innerNode();

- if (!node)

- continue;

- // Touch events should not go to text nodes

- if (node->isTextNode())

- node = ComposedTreeTraversal::parent(*node);

- if (!m_touchSequenceDocument) {

- // Keep track of which document should receive all touch events

- // in the active sequence. This must be a single document to

- // ensure we don't leak Nodes between documents.

- m_touchSequenceDocument = &(result.innerNode()->document());

- ASSERT(m_touchSequenceDocument->frame()->view());

- }

- // Ideally we'd ASSERT(!m_targetForTouchID.contains(point.id())

- // since we shouldn't get a touchstart for a touch that's already

- // down. However EventSender allows this to be violated and there's

- // some tests that take advantage of it. There may also be edge

- // cases in the browser where this happens.

- // See http://crbug.com/345372.

- m_targetForTouchID.set(point.id(), node);

- TouchAction effectiveTouchAction = computeEffectiveTouchAction(*node);

- if (effectiveTouchAction != TouchActionAuto)

- m_frame->page()->chromeClient().setTouchAction(effectiveTouchAction);

- }

- m_touchPressed = !allTouchReleased;

- // If there's no document receiving touch events, or no handlers on the

- // document set to receive the events, then we can skip all the rest of

- // this work.

- if (!m_touchSequenceDocument || !m_touchSequenceDocument->frameHost() || !m_touchSequenceDocument->frameHost()->eventHandlerRegistry().hasEventHandlers(EventHandlerRegistry::TouchEvent) || !m_touchSequenceDocument->frame()) {

- if (allTouchReleased) {

- m_touchSequenceDocument.clear();

- m_touchSequenceUserGestureToken.clear();

- }

- return false;

- }

- // Build up the lists to use for the 'touches', 'targetTouches' and

- // 'changedTouches' attributes in the JS event. See

- // http://www.w3.org/TR/touch-events/#touchevent-interface for how these

- // lists fit together.

- // Holds the complete set of touches on the screen.

- RefPtrWillBeRawPtr<TouchList> touches = TouchList::create();

- // A different view on the 'touches' list above, filtered and grouped by

- // event target. Used for the 'targetTouches' list in the JS event.

- using TargetTouchesHeapMap = WillBeHeapHashMap<EventTarget*, RefPtrWillBeMember<TouchList>>;

- TargetTouchesHeapMap touchesByTarget;

- // Array of touches per state, used to assemble the 'changedTouches' list.

- using EventTargetSet = WillBeHeapHashSet<RefPtrWillBeMember<EventTarget>>;

- struct {

- // The touches corresponding to the particular change state this struct

- // instance represents.

- RefPtrWillBeMember<TouchList> m_touches;

- // Set of targets involved in m_touches.

- EventTargetSet m_targets;

- } changedTouches[PlatformTouchPoint::TouchStateEnd];

- for (i = 0; i < points.size(); ++i) {

- const PlatformTouchPoint& point = points[i];

- PlatformTouchPoint::State pointState = point.state();

- RefPtrWillBeRawPtr<EventTarget> touchTarget = nullptr;

- if (pointState == PlatformTouchPoint::TouchReleased || pointState == PlatformTouchPoint::TouchCancelled) {

- // The target should be the original target for this touch, so get

- // it from the hashmap. As it's a release or cancel we also remove

- // it from the map.

- touchTarget = m_targetForTouchID.take(point.id());

- } else {

- // No hittest is performed on move or stationary, since the target

- // is not allowed to change anyway.

- touchTarget = m_targetForTouchID.get(point.id());

- }

- LocalFrame* targetFrame = nullptr;

- bool knownTarget = false;

- if (touchTarget) {

- Document& doc = touchTarget->toNode()->document();

- // If the target node has moved to a new document while it was being touched,

- // we can't send events to the new document because that could leak nodes

- // from one document to another. See http://crbug.com/394339.

- if (&doc == m_touchSequenceDocument.get()) {

- targetFrame = doc.frame();

- knownTarget = true;

- }

- if (!knownTarget) {

- // If we don't have a target registered for the point it means we've

- // missed our opportunity to do a hit test for it (due to some

- // optimization that prevented blink from ever seeing the

- // touchstart), or that the touch started outside the active touch

- // sequence document. We should still include the touch in the

- // Touches list reported to the application (eg. so it can

- // differentiate between a one and two finger gesture), but we won't

- // actually dispatch any events for it. Set the target to the

- // Document so that there's some valid node here. Perhaps this

- // should really be LocalDOMWindow, but in all other cases the target of

- // a Touch is a Node so using the window could be a breaking change.

- // Since we know there was no handler invoked, the specific target

- // should be completely irrelevant to the application.

- touchTarget = m_touchSequenceDocument;

- targetFrame = m_touchSequenceDocument->frame();

- }

- ASSERT(targetFrame);

- // pagePoint should always be in the target element's document coordinates.

- FloatPoint pagePoint = targetFrame->view()->rootFrameToContents(point.pos());

- float scaleFactor = 1.0f / targetFrame->pageZoomFactor();

- FloatPoint adjustedPagePoint = pagePoint.scaledBy(scaleFactor);

- FloatSize adjustedRadius = point.radius().scaledBy(scaleFactor);

- RefPtrWillBeRawPtr<Touch> touch = Touch::create(

- targetFrame, touchTarget.get(), point.id(), point.screenPos(), adjustedPagePoint, adjustedRadius, point.rotationAngle(), point.force());

- // Ensure this target's touch list exists, even if it ends up empty, so

- // it can always be passed to TouchEvent::Create below.

- TargetTouchesHeapMap::iterator targetTouchesIterator = touchesByTarget.find(touchTarget.get());

- if (targetTouchesIterator == touchesByTarget.end()) {

- touchesByTarget.set(touchTarget.get(), TouchList::create());

- targetTouchesIterator = touchesByTarget.find(touchTarget.get());

- }

- // touches and targetTouches should only contain information about

- // touches still on the screen, so if this point is released or

- // cancelled it will only appear in the changedTouches list.

- if (pointState != PlatformTouchPoint::TouchReleased && pointState != PlatformTouchPoint::TouchCancelled) {

- touches->append(touch);

- targetTouchesIterator->value->append(touch);

- }

- // Now build up the correct list for changedTouches.

- // Note that any touches that are in the TouchStationary state (e.g. if

- // the user had several points touched but did not move them all) should

- // never be in the changedTouches list so we do not handle them

- // explicitly here. See https://bugs.webkit.org/show_bug.cgi?id=37609

- // for further discussion about the TouchStationary state.

- if (pointState != PlatformTouchPoint::TouchStationary && knownTarget) {

- ASSERT(pointState < PlatformTouchPoint::TouchStateEnd);

- if (!changedTouches[pointState].m_touches)

- changedTouches[pointState].m_touches = TouchList::create();

- changedTouches[pointState].m_touches->append(touch);

- changedTouches[pointState].m_targets.add(touchTarget);

- }

- if (allTouchReleased) {

- m_touchSequenceDocument.clear();

- m_touchSequenceUserGestureToken.clear();

- }

- // Now iterate the changedTouches list and m_targets within it, sending

- // events to the targets as required.

- bool swallowedEvent = false;

- for (unsigned state = 0; state != PlatformTouchPoint::TouchStateEnd; ++state) {

- if (!changedTouches[state].m_touches)

- continue;

- const AtomicString& stateName(eventNameForTouchPointState(static_cast<PlatformTouchPoint::State>(state)));

- const EventTargetSet& targetsForState = changedTouches[state].m_targets;

- for (const RefPtrWillBeMember<EventTarget>& eventTarget : targetsForState) {

- EventTarget* touchEventTarget = eventTarget.get();

- RefPtrWillBeRawPtr<TouchEvent> touchEvent = TouchEvent::create(

- touches.get(), touchesByTarget.get(touchEventTarget), changedTouches[state].m_touches.get(),

- stateName, touchEventTarget->toNode()->document().domWindow(),

- event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(), event.cancelable(), event.causesScrollingIfUncanceled(), event.timestamp());

- touchEventTarget->toNode()->dispatchTouchEvent(touchEvent.get());

- swallowedEvent = swallowedEvent || touchEvent->defaultPrevented() || touchEvent->defaultHandled();

- }

- return swallowedEvent;

-TouchAction EventHandler::intersectTouchAction(TouchAction action1, TouchAction action2)

- if (action1 == TouchActionNone || action2 == TouchActionNone)

- return TouchActionNone;

- if (action1 == TouchActionAuto)

- return action2;

- if (action2 == TouchActionAuto)

- return action1;

- if (!(action1 & action2))

- return TouchActionNone;

- return action1 & action2;

-// touch-action applies to all elements with both width AND height properties.

-// According to the CSS Box Model Spec (http://dev.w3.org/csswg/css-box/#the-width-and-height-properties)

-// width applies to all elements but non-replaced inline elements, table rows, and row groups and

-// height applies to all elements but non-replaced inline elements, table columns, and column groups.

-static inline bool supportsTouchAction(const LayoutObject& object)

- if (object.isInline() && !object.isReplaced())

- return false;

- if (object.isTableRow() || object.isLayoutTableCol())

- return false;

- return true;

-TouchAction EventHandler::computeEffectiveTouchAction(const Node& node)

- // Start by permitting all actions, then walk the elements supporting

- // touch-action from the target node up to the nearest scrollable ancestor

- // and exclude any prohibited actions.

- TouchAction effectiveTouchAction = TouchActionAuto;

- for (const Node* curNode = &node; curNode; curNode = ComposedTreeTraversal::parent(*curNode)) {

- if (LayoutObject* layoutObject = curNode->layoutObject()) {

- if (supportsTouchAction(*layoutObject)) {

- TouchAction action = layoutObject->style()->touchAction();

- effectiveTouchAction = intersectTouchAction(action, effectiveTouchAction);

- if (effectiveTouchAction == TouchActionNone)

- break;

- }

- // If we've reached an ancestor that supports a touch action, search no further.

- if (layoutObject->isBox() && toLayoutBox(layoutObject)->scrollsOverflow())

- break;

- }

- return effectiveTouchAction;

-void EventHandler::setLastKnownMousePosition(const PlatformMouseEvent& event)

- m_mousePositionIsUnknown = false;

- m_lastKnownMousePosition = event.position();

- m_lastKnownMouseGlobalPosition = event.globalPosition();

-bool EventHandler::passMousePressEventToSubframe(MouseEventWithHitTestResults& mev, LocalFrame* subframe)

- // If we're clicking into a frame that is selected, the frame will appear

- // greyed out even though we're clicking on the selection. This looks

- // really strange (having the whole frame be greyed out), so we deselect the

- // selection.

- IntPoint p = m_frame->view()->rootFrameToContents(mev.event().position());

- if (m_frame->selection().contains(p)) {

- VisiblePosition visiblePos(

- mev.innerNode()->layoutObject()->positionForPoint(mev.localPoint()));

- VisibleSelection newSelection(visiblePos);

- m_frame->selection().setSelection(newSelection);

- }

- subframe->eventHandler().handleMousePressEvent(mev.event());

- return true;

-bool EventHandler::passMouseMoveEventToSubframe(MouseEventWithHitTestResults& mev, LocalFrame* subframe, HitTestResult* hoveredNode)

- if (m_mouseDownMayStartDrag)

- return false;

- subframe->eventHandler().handleMouseMoveOrLeaveEvent(mev.event(), hoveredNode);

- return true;

-bool EventHandler::passMouseReleaseEventToSubframe(MouseEventWithHitTestResults& mev, LocalFrame* subframe)

- subframe->eventHandler().handleMouseReleaseEvent(mev.event());

- return true;

-bool EventHandler::passWheelEventToWidget(const PlatformWheelEvent& wheelEvent, Widget& widget)

- // If not a FrameView, then probably a plugin widget. Those will receive

- // the event via an EventTargetNode dispatch when this returns false.

- if (!widget.isFrameView())

- return false;

- return toFrameView(&widget)->frame().eventHandler().handleWheelEvent(wheelEvent);

-DataTransfer* EventHandler::createDraggingDataTransfer() const

- return DataTransfer::create(DataTransfer::DragAndDrop, DataTransferWritable, DataObject::create());

-void EventHandler::focusDocumentView()

- Page* page = m_frame->page();

- if (!page)

- return;

- page->focusController().focusDocumentView(m_frame);

-unsigned EventHandler::accessKeyModifiers()

-#if OS(MACOSX)

- return PlatformEvent::CtrlKey | PlatformEvent::AltKey;

-#else

- return PlatformEvent::AltKey;

-#endif

+ return m_mouseDownWasSingleClickInSelection;

}

} // namespace blink

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