third_party/WebKit/Source/core/input/EventHandler.cpp - Issue 2350433002: Extract more of the mouse logic from EventHandler

Unified Diff: third_party/WebKit/Source/core/input/EventHandler.cpp

Issue 2350433002: Extract more of the mouse logic from EventHandler (Closed)

Patch Set: applying comments Created 4 years, 3 months ago

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Index: third_party/WebKit/Source/core/input/EventHandler.cpp

diff --git a/third_party/WebKit/Source/core/input/EventHandler.cpp b/third_party/WebKit/Source/core/input/EventHandler.cpp

index 9f8a56ca988c8452f8d9964769c01c7f5770678a..5a62e0ce66bda2311a5afe48260269d21643b842 100644

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

+++ b/third_party/WebKit/Source/core/input/EventHandler.cpp

@@ -30,7 +30,6 @@

#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/DOMNodeIds.h"

#include "core/dom/Document.h"

@@ -41,7 +40,6 @@

#include "core/editing/Editor.h"

#include "core/editing/FrameSelection.h"

#include "core/editing/SelectionController.h"

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

#include "core/events/EventPath.h"

#include "core/events/GestureEvent.h"

#include "core/events/KeyboardEvent.h"

@@ -77,14 +75,12 @@

#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/TouchAdjustment.h"

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

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

#include "core/style/ComputedStyle.h"

#include "core/style/CursorData.h"

#include "core/svg/SVGDocumentExtensions.h"

@@ -126,18 +122,6 @@ bool shouldRefetchEventTarget(const MouseEventWithHitTestResults& mev)

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.

-static const double fakeMouseMoveInterval = 0.1;

// 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;

@@ -153,16 +137,8 @@ static const double minimumCursorScale = 0.001;

// 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) { }

@@ -178,44 +154,27 @@ private:

EventHandler::EventHandler(LocalFrame* frame)

: m_frame(frame)

- , m_mousePressed(false)

- , m_capturesDragging(false)

- , m_mouseDownMayStartDrag(false)

, m_selectionController(SelectionController::create(*frame))

, m_hoverTimer(this, &EventHandler::hoverTimerFired)

, m_cursorUpdateTimer(this, &EventHandler::cursorUpdateTimerFired)

- , m_mouseDownMayStartAutoscroll(false)

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

- , m_svgPan(false)

, m_eventHandlerWillResetCapturingMouseEventsNode(0)

- , m_clickCount(0)

, m_shouldOnlyFireDragOverEvent(false)

- , m_mousePositionIsUnknown(true)

- , m_mouseDownTimestamp(0)

, m_scrollManager(new ScrollManager(frame))

- , m_mouseEventManager(new MouseEventManager(frame))

+ , m_mouseEventManager(new MouseEventManager(frame, m_scrollManager))

, m_keyboardEventManager(new KeyboardEventManager(frame, m_scrollManager))

, m_pointerEventManager(new PointerEventManager(frame, m_mouseEventManager))

- , m_gestureManager(new GestureManager(frame, m_scrollManager, m_pointerEventManager, m_selectionController))

+ , m_gestureManager(new GestureManager(frame, m_scrollManager, m_mouseEventManager, m_pointerEventManager, m_selectionController))

, m_activeIntervalTimer(this, &EventHandler::activeIntervalTimerFired)

{

}

-EventHandler::~EventHandler()

- ASSERT(!m_fakeMouseMoveEventTimer.isActive());

DEFINE_TRACE(EventHandler)

{

visitor->trace(m_frame);

- visitor->trace(m_mousePressNode);

visitor->trace(m_selectionController);

visitor->trace(m_capturingMouseEventsNode);

- visitor->trace(m_nodeUnderMouse);

visitor->trace(m_lastMouseMoveEventSubframe);

visitor->trace(m_lastScrollbarUnderMouse);

- visitor->trace(m_clickNode);

visitor->trace(m_dragTarget);

visitor->trace(m_frameSetBeingResized);

visitor->trace(m_scrollManager);

@@ -226,185 +185,34 @@ DEFINE_TRACE(EventHandler)

visitor->trace(m_lastDeferredTapElement);

}

-DragState& EventHandler::dragState()

- DEFINE_STATIC_LOCAL(DragState, state, (new DragState));

- return state;

void EventHandler::clear()

{

m_hoverTimer.stop();

m_cursorUpdateTimer.stop();

- m_fakeMouseMoveEventTimer.stop();

m_activeIntervalTimer.stop();

- m_nodeUnderMouse = 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_pointerEventManager->clear();

m_scrollManager->clear();

m_gestureManager->clear();

m_mouseEventManager->clear();

- m_mouseDownMayStartDrag = false;

m_lastDeferredTapElement = nullptr;

m_eventHandlerWillResetCapturingMouseEventsNode = false;

- m_mouseDownMayStartAutoscroll = false;

- m_svgPan = false;

- m_mouseDownPos = IntPoint();

- m_mouseDownTimestamp = 0;

- m_dragStartPos = LayoutPoint();

- m_mouseDown = PlatformMouseEvent();

}

void EventHandler::nodeWillBeRemoved(Node& nodeToBeRemoved)

{

- if (nodeToBeRemoved.isShadowIncludingInclusiveAncestorOf(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;

- }

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

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

- // Reset drag state.

- dragState().m_dragSrc = nullptr;

- cancelFakeMouseMoveEvent();

- m_frame->document()->updateStyleAndLayoutIgnorePendingStylesheets();

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

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

- return WebInputEventResult::NotHandled;

- }

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

- m_mouseDownMayStartDrag = singleClick && !isLinkSelection(event) && !isExtendingSelection(event);

- selectionController().handleMousePressEvent(event);

- 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 WebInputEventResult::HandledSystem;

- }

- // 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_frame->document()->setSequentialFocusNavigationStartingPoint(innerNode);

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

- bool swallowEvent = false;

- m_mousePressed = true;

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

- swallowEvent = selectionController().handleMousePressEventDoubleClick(event);

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

- swallowEvent = selectionController().handleMousePressEventTripleClick(event);

- else

- swallowEvent = selectionController().handleMousePressEventSingleClick(event);

- m_mouseDownMayStartAutoscroll = selectionController().mouseDownMayStartSelect()

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

- return swallowEvent ? WebInputEventResult::HandledSystem : WebInputEventResult::NotHandled;

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

- 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().pointerProperties().button != WebPointerProperties::Button::Left)

- m_mousePressed = false;

- if (!m_mousePressed)

- return WebInputEventResult::NotHandled;

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

- return WebInputEventResult::HandledSystem;

- Node* targetNode = event.innerNode();

- if (!targetNode)

- return WebInputEventResult::NotHandled;

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

- if (!layoutObject) {

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

- if (!parent)

- return WebInputEventResult::NotHandled;

- layoutObject = parent->layoutObject();

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

- return WebInputEventResult::NotHandled;

- }

- m_mouseDownMayStartDrag = false;

- if (m_mouseDownMayStartAutoscroll && !m_scrollManager->middleClickAutoscrollInProgress()) {

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

- controller->startAutoscrollForSelection(layoutObject);

- m_mouseDownMayStartAutoscroll = false;

- }

- selectionController().handleMouseDraggedEvent(event, m_mouseDownPos, m_dragStartPos, m_mousePressNode.get(), m_lastKnownMousePosition);

- return WebInputEventResult::HandledSystem;

+ m_mouseEventManager->nodeWillBeRemoved(nodeToBeRemoved);

}

void EventHandler::updateSelectionForMouseDrag()

{

- selectionController().updateSelectionForMouseDrag(m_mousePressNode.get(), m_dragStartPos, m_lastKnownMousePosition);

-// TODO(nzolghadr): Refactor the mouse related functions to MouseEventManager.

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

- AutoscrollController* controller = m_scrollManager->autoscrollController();

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

- m_scrollManager->stopAutoscroll();

- return selectionController().handleMouseReleaseEvent(event, m_dragStartPos) ? WebInputEventResult::HandledSystem : WebInputEventResult::NotHandled;

+ m_mouseEventManager->updateSelectionForMouseDrag();

}

void EventHandler::startMiddleClickAutoscroll(LayoutObject* layoutObject)

@@ -415,8 +223,8 @@ void EventHandler::startMiddleClickAutoscroll(LayoutObject* layoutObject)

AutoscrollController* controller = m_scrollManager->autoscrollController();

if (!controller)

return;

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

- invalidateClick();

+ controller->startMiddleClickAutoscroll(toLayoutBox(layoutObject), m_mouseEventManager->lastKnownMousePosition());

+ m_mouseEventManager->invalidateClick();

}

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

@@ -448,7 +256,7 @@ HitTestResult EventHandler::hitTestResultAtPoint(const LayoutPoint& point, HitTe

// 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.

+ // See also the similar code in Document::performMouseEventHitTest.

if (m_frame->contentLayoutItem().isNull() || !m_frame->view() || !m_frame->view()->didFirstLayout())

return result;

@@ -468,18 +276,18 @@ void EventHandler::stopAutoscroll()

// defaultSpaceEventHandler's chaining scroll can be done crossing frames.

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

{

- return m_scrollManager->bubblingScroll(direction, granularity, startingNode, m_mousePressNode);

+ return m_scrollManager->bubblingScroll(direction, granularity, startingNode, m_mouseEventManager->mousePressNode());

}

IntPoint EventHandler::lastKnownMousePosition() const

{

- return m_lastKnownMousePosition;

+ return m_mouseEventManager->lastKnownMousePosition();

}

IntPoint EventHandler::dragDataTransferLocationForTesting()

{

- if (dragState().m_dragDataTransfer)

- return dragState().m_dragDataTransfer->dragLocation();

+ if (m_mouseEventManager->dragState().m_dragDataTransfer)

+ return m_mouseEventManager->dragState().m_dragDataTransfer->dragLocation();

return IntPoint();

}

@@ -536,7 +344,7 @@ void EventHandler::updateCursor()

// update could be occluded by a different frame.

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

- if (m_mousePositionIsUnknown)

+ if (m_mouseEventManager->isMousePositionUnknown())

return;

FrameView* view = m_frame->view();

@@ -550,7 +358,7 @@ void EventHandler::updateCursor()

m_frame->document()->updateStyleAndLayout();

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

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

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

layoutViewItem.hitTest(result);

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

@@ -719,8 +527,8 @@ OptionalCursor EventHandler::selectAutoCursor(const HitTestResult& result, Node*

// 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 && selectionController().mouseDownMayStartSelect()

- && !m_mouseDownMayStartDrag

+ if (m_mouseEventManager->mousePressed() && selectionController().mouseDownMayStartSelect()

+ && !m_mouseEventManager->mouseDownMayStartDrag()

&& !m_frame->selection().isNone()

&& !m_capturingMouseEventsNode) {

return iBeam;

@@ -731,14 +539,6 @@ OptionalCursor EventHandler::selectAutoCursor(const HitTestResult& result, Node*

return pointerCursor();

}

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

- 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;

WebInputEventResult EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent)

{

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

@@ -752,35 +552,26 @@ WebInputEventResult EventHandler::handleMousePressEvent(const PlatformMouseEvent

UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);

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

- cancelFakeMouseMoveEvent();

if (m_eventHandlerWillResetCapturingMouseEventsNode)

m_capturingMouseEventsNode = nullptr;

- m_mousePressed = true;

- m_capturesDragging = true;

- setLastKnownMousePosition(mouseEvent);

- m_mouseDownTimestamp = mouseEvent.timestamp();

- m_mouseDownMayStartDrag = false;

+ m_mouseEventManager->handleMousePressEventUpdateStates(mouseEvent);

selectionController().setMouseDownMayStartSelect(false);

- m_mouseDownMayStartAutoscroll = false;

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

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

- } else {

- invalidateClick();

+ if (!m_frame->view())

return WebInputEventResult::NotHandled;

- }

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);

+ LayoutPoint documentPoint = EventHandlingUtil::contentPointFromRootFrame(m_frame, mouseEvent.position());

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

if (!mev.innerNode()) {

- invalidateClick();

+ m_mouseEventManager->invalidateClick();

return WebInputEventResult::NotHandled;

}

- m_mousePressNode = mev.innerNode();

+ m_mouseEventManager->setMousePressNode(mev.innerNode());

m_frame->document()->setSequentialFocusNavigationStartingPoint(mev.innerNode());

LocalFrame* subframe = subframeForHitTestResult(mev);

@@ -790,12 +581,12 @@ WebInputEventResult EventHandler::handleMousePressEvent(const PlatformMouseEvent

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

// The capturing should be done only when the result indicates it

// has been handled. See crbug.com/269917

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

- if (m_mousePressed && m_capturesDragging) {

+ m_mouseEventManager->setCapturesDragging(subframe->eventHandler().m_mouseEventManager->capturesDragging());

+ if (m_mouseEventManager->mousePressed() && m_mouseEventManager->capturesDragging()) {

m_capturingMouseEventsNode = mev.innerNode();

m_eventHandlerWillResetCapturingMouseEventsNode = true;

}

- invalidateClick();

+ m_mouseEventManager->invalidateClick();

return result;

}

@@ -807,18 +598,18 @@ WebInputEventResult EventHandler::handleMousePressEvent(const PlatformMouseEvent

if (isMiddleClickAutoscrollInProgress) {

// We invalidate the click when exiting middle click auto scroll 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();

+ m_mouseEventManager->invalidateClick();

return WebInputEventResult::HandledSuppressed;

}

- m_clickCount = mouseEvent.clickCount();

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

+ m_mouseEventManager->setClickCount(mouseEvent.clickCount());

+ m_mouseEventManager->setClickNode(mev.innerNode()->isTextNode() ? FlatTreeTraversal::parent(*mev.innerNode()) : mev.innerNode());

if (!mouseEvent.fromTouch())

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

- WebInputEventResult eventResult = updatePointerTargetAndDispatchEvents(EventTypeNames::mousedown, mev.innerNode(), m_clickCount, mev.event());

+ WebInputEventResult eventResult = updatePointerTargetAndDispatchEvents(EventTypeNames::mousedown, mev.innerNode(), mev.event());

if (eventResult == WebInputEventResult::NotHandled && m_frame->view()) {

FrameView* view = m_frame->view();

@@ -840,15 +631,15 @@ WebInputEventResult EventHandler::handleMousePressEvent(const PlatformMouseEvent

InputDeviceCapabilities* sourceCapabilities = mouseEvent.getSyntheticEventType() == PlatformMouseEvent::FromTouch ? InputDeviceCapabilities::firesTouchEventsSourceCapabilities() :

InputDeviceCapabilities::doesntFireTouchEventsSourceCapabilities();

if (eventResult == WebInputEventResult::NotHandled)

- eventResult = handleMouseFocus(hitTestResult, sourceCapabilities);

- m_capturesDragging = eventResult == WebInputEventResult::NotHandled || mev.scrollbar();

+ eventResult = m_mouseEventManager->handleMouseFocus(hitTestResult, sourceCapabilities);

+ m_mouseEventManager->setCapturesDragging(eventResult == WebInputEventResult::NotHandled || 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);

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

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

m_lastScrollbarUnderMouse = nullptr;

}

@@ -859,13 +650,13 @@ WebInputEventResult EventHandler::handleMousePressEvent(const PlatformMouseEvent

} else {

if (shouldRefetchEventTarget(mev)) {

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

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

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

}

if (passMousePressEventToScrollbar(mev))

eventResult = WebInputEventResult::HandledSystem;

else

- eventResult = handleMousePressEvent(mev);

+ eventResult = m_mouseEventManager->handleMousePressEvent(mev);

}

if (mev.hitTestResult().innerNode() && mouseEvent.pointerProperties().button == WebPointerProperties::Button::Left) {

@@ -878,32 +669,6 @@ WebInputEventResult EventHandler::handleMousePressEvent(const PlatformMouseEvent

return eventResult;

}

-static PaintLayer* layerForNode(Node* node)

- if (!node)

- return nullptr;

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

- if (!layoutObject)

- return nullptr;

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

- if (!layer)

- return nullptr;

- return layer;

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

- if (PaintLayerScrollableArea* scrollableArea = layer->getScrollableArea()) {

- if (scrollableArea->scrollsOverflow())

- return scrollableArea;

- }

- return nullptr;

WebInputEventResult EventHandler::handleMouseMoveEvent(const PlatformMouseEvent& event)

{

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

@@ -915,8 +680,8 @@ WebInputEventResult EventHandler::handleMouseMoveEvent(const PlatformMouseEvent&

if (!page)

return result;

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

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

+ if (PaintLayer* layer = EventHandlingUtil::layerForNode(hoveredNode.innerNode())) {

+ if (ScrollableArea* layerScrollableArea = EventHandlingUtil::associatedScrollableArea(layer))

layerScrollableArea->mouseMovedInContentArea();

}

@@ -941,25 +706,22 @@ WebInputEventResult EventHandler::handleMouseMoveOrLeaveEvent(const PlatformMous

ASSERT(m_frame);

ASSERT(m_frame->view());

- setLastKnownMousePosition(mouseEvent);

+ m_mouseEventManager->setLastKnownMousePosition(mouseEvent);

if (m_hoverTimer.isActive())

m_hoverTimer.stop();

m_cursorUpdateTimer.stop();

- cancelFakeMouseMoveEvent();

+ m_mouseEventManager->cancelFakeMouseMoveEvent();

- if (m_svgPan) {

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

- return WebInputEventResult::HandledSuppressed;

- }

+ m_mouseEventManager->handleSvgPanIfNeeded(false);

if (m_frameSetBeingResized)

- return updatePointerTargetAndDispatchEvents(EventTypeNames::mousemove, m_frameSetBeingResized.get(), 0, mouseEvent);

+ return updatePointerTargetAndDispatchEvents(EventTypeNames::mousemove, m_frameSetBeingResized.get(), mouseEvent);

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

- if (m_lastScrollbarUnderMouse && m_mousePressed) {

+ if (m_lastScrollbarUnderMouse && m_mouseEventManager->mousePressed()) {

m_lastScrollbarUnderMouse->mouseMoved(mouseEvent);

return WebInputEventResult::HandledSystem;

}

@@ -968,7 +730,7 @@ WebInputEventResult EventHandler::handleMouseMoveOrLeaveEvent(const PlatformMous

ASSERT(!mouseEvent.fromTouch());

HitTestRequest::HitTestRequestType hitType = HitTestRequest::Move;

- if (m_mousePressed) {

+ if (m_mouseEventManager->mousePressed()) {

hitType |= HitTestRequest::Active;

} else if (onlyUpdateScrollbars) {

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

@@ -989,7 +751,7 @@ WebInputEventResult EventHandler::handleMouseMoveOrLeaveEvent(const PlatformMous

if (forceLeave)

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

else

- mev = prepareMouseEvent(request, mouseEvent);

+ mev = EventHandlingUtil::performMouseEventHitTest(m_frame, request, mouseEvent);

if (hoveredNode)

*hoveredNode = mev.hitTestResult();

@@ -1002,7 +764,7 @@ WebInputEventResult EventHandler::handleMouseMoveOrLeaveEvent(const PlatformMous

if (!scrollbar)

scrollbar = mev.scrollbar();

- updateLastScrollbarUnderMouse(scrollbar, !m_mousePressed);

+ updateLastScrollbarUnderMouse(scrollbar, !m_mouseEventManager->mousePressed());

if (onlyUpdateScrollbars)

return WebInputEventResult::HandledSuppressed;

}

@@ -1016,14 +778,14 @@ WebInputEventResult EventHandler::handleMouseMoveOrLeaveEvent(const PlatformMous

if (newSubframe) {

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

- updateMouseEventTargetNodeAndSendEvents(mev.innerNode(), mev.event(), true);

+ m_pointerEventManager->sendMouseAndPointerBoundaryEvents(updateMouseEventTargetNode(mev.innerNode()), mev.event());

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

+ // Event dispatch in sendMouseAndPointerBoundaryEvents 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())

eventResult = passMouseMoveEventToSubframe(mev, newSubframe, hoveredNode);

} else {

- if (scrollbar && !m_mousePressed)

+ if (scrollbar && !m_mouseEventManager->mousePressed())

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

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

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

@@ -1038,27 +800,11 @@ WebInputEventResult EventHandler::handleMouseMoveOrLeaveEvent(const PlatformMous

if (eventResult != WebInputEventResult::NotHandled)

return eventResult;

- eventResult = updatePointerTargetAndDispatchEvents(EventTypeNames::mousemove, mev.innerNode(), 0, mev.event());

+ eventResult = updatePointerTargetAndDispatchEvents(EventTypeNames::mousemove, mev.innerNode(), mev.event());

if (eventResult != WebInputEventResult::NotHandled)

return eventResult;

- return handleMouseDraggedEvent(mev);

-void EventHandler::invalidateClick()

- m_clickCount = 0;

- m_clickNode = nullptr;

-ContainerNode* EventHandler::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 FlatTreeTraversal::parent(node);

+ return m_mouseEventManager->handleMouseDraggedEvent(mev);

}

WebInputEventResult EventHandler::handleMouseReleaseEvent(const PlatformMouseEvent& mouseEvent)

@@ -1086,22 +832,17 @@ WebInputEventResult EventHandler::handleMouseReleaseEvent(const PlatformMouseEve

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

}

- m_mousePressed = false;

- setLastKnownMousePosition(mouseEvent);

- if (m_svgPan) {

- m_svgPan = false;

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

- return WebInputEventResult::HandledSuppressed;

- }

+ m_mouseEventManager->setMousePressed(false);

+ m_mouseEventManager->setLastKnownMousePosition(mouseEvent);

+ m_mouseEventManager->handleSvgPanIfNeeded(true);

if (m_frameSetBeingResized)

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

+ return m_mouseEventManager->setMousePositionAndDispatchMouseEvent(updateMouseEventTargetNode(m_frameSetBeingResized.get()), EventTypeNames::mouseup, mouseEvent);

if (m_lastScrollbarUnderMouse) {

- invalidateClick();

+ m_mouseEventManager->invalidateClick();

m_lastScrollbarUnderMouse->mouseUp(mouseEvent);

- return updatePointerTargetAndDispatchEvents(EventTypeNames::mouseup, m_nodeUnderMouse.get(), m_clickCount, mouseEvent);

+ return updatePointerTargetAndDispatchEvents(EventTypeNames::mouseup, m_mouseEventManager->getNodeUnderMouse(), mouseEvent);

}

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

@@ -1109,90 +850,27 @@ WebInputEventResult EventHandler::handleMouseReleaseEvent(const PlatformMouseEve

HitTestRequest::HitTestRequestType hitType = HitTestRequest::Release;

HitTestRequest request(hitType);

- MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);

+ MouseEventWithHitTestResults mev = EventHandlingUtil::performMouseEventHitTest(m_frame, request, mouseEvent);

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

if (m_eventHandlerWillResetCapturingMouseEventsNode)

m_capturingMouseEventsNode = nullptr;

if (subframe)

return passMouseReleaseEventToSubframe(mev, subframe);

- WebInputEventResult eventResult = updatePointerTargetAndDispatchEvents(EventTypeNames::mouseup, mev.innerNode(), m_clickCount, mev.event());

- // We only prevent click event when the click may cause contextmenu to popup.

- // However, we always send auxclick.

- bool contextMenuEvent = !RuntimeEnabledFeatures::auxclickEnabled()

- && mouseEvent.pointerProperties().button == WebPointerProperties::Button::Right;

-#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.pointerProperties().button == WebPointerProperties::Button::Left

- && mouseEvent.getModifiers() & PlatformEvent::CtrlKey)

- contextMenuEvent = true;

-#endif

- WebInputEventResult clickEventResult = WebInputEventResult::NotHandled;

- const bool shouldDispatchClickEvent = m_clickCount > 0

- && !contextMenuEvent

- && mev.innerNode() && m_clickNode

- && mev.innerNode()->canParticipateInFlatTree() && m_clickNode->canParticipateInFlatTree()

- && !(selectionController().hasExtendedSelection() && isLinkSelection(mev));

- if (shouldDispatchClickEvent) {

- Node* clickTargetNode = nullptr;

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

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

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

- if (m_clickNode == mev.innerNode()) {

- clickTargetNode = m_clickNode;

- clickTargetNode->updateDistribution();

- } else if (m_clickNode->document() == mev.innerNode()->document()) {

- m_clickNode->updateDistribution();

- mev.innerNode()->updateDistribution();

- clickTargetNode = mev.innerNode()->commonAncestor(

- *m_clickNode, parentForClickEvent);

- }

- if (clickTargetNode) {

- // Dispatch mouseup directly w/o calling updateMouseEventTargetNodeAndSendEvents

- // because the mouseup dispatch above has already updated it

- // correctly. Moreover, clickTargetNode is different from

- // mev.innerNode at drag-release.

- clickEventResult = EventHandlingUtil::toWebInputEventResult(

- clickTargetNode->dispatchMouseEvent(mev.event(),

- !RuntimeEnabledFeatures::auxclickEnabled()

- || (mev.event().pointerProperties().button == WebPointerProperties::Button::Left)

- ? EventTypeNames::click

- : EventTypeNames::auxclick,

- m_clickCount));

- }

+ WebInputEventResult eventResult = updatePointerTargetAndDispatchEvents(EventTypeNames::mouseup, mev.innerNode(), mev.event());

+ WebInputEventResult clickEventResult = m_mouseEventManager->dispatchMouseClickIfNeeded(mev);

m_scrollManager->clearResizeScrollableArea(false);

if (eventResult == WebInputEventResult::NotHandled)

- eventResult = handleMouseReleaseEvent(mev);

- clearDragHeuristicState();

+ eventResult = m_mouseEventManager->handleMouseReleaseEvent(mev);

+ m_mouseEventManager->clearDragHeuristicState();

- invalidateClick();

+ m_mouseEventManager->invalidateClick();

return EventHandlingUtil::mergeEventResult(clickEventResult, eventResult);

}

-WebInputEventResult 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 WebInputEventResult::NotHandled;

- DragEvent* me = DragEvent::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.getModifiers(),

- 0, MouseEvent::platformModifiersToButtons(event.getModifiers()), nullptr, event.timestamp(), dataTransfer, event.getSyntheticEventType());

- return EventHandlingUtil::toWebInputEventResult(dragTarget->dispatchEvent(me));

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

{

if (!isHTMLFrameElementBase(target))

@@ -1253,7 +931,7 @@ WebInputEventResult EventHandler::updateDragAndDrop(const PlatformMouseEvent& ev

return eventResult;

HitTestRequest request(HitTestRequest::ReadOnly);

- MouseEventWithHitTestResults mev = prepareMouseEvent(request, event);

+ MouseEventWithHitTestResults mev = EventHandlingUtil::performMouseEventHitTest(m_frame, request, event);

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

Node* newTarget = mev.innerNode();

@@ -1275,11 +953,11 @@ WebInputEventResult EventHandler::updateDragAndDrop(const PlatformMouseEvent& ev

eventResult = 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) {

+ if (m_mouseEventManager->dragState().m_dragSrc) {

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

- dispatchDragSrcEvent(EventTypeNames::drag, event);

+ m_mouseEventManager->dispatchDragSrcEvent(EventTypeNames::drag, event);

}

- eventResult = dispatchDragEvent(EventTypeNames::dragenter, newTarget, event, dataTransfer);

+ eventResult = m_mouseEventManager->dispatchDragEvent(EventTypeNames::dragenter, newTarget, event, dataTransfer);

if (eventResult == WebInputEventResult::NotHandled && findDropZone(newTarget, dataTransfer))

eventResult = WebInputEventResult::HandledSystem;

}

@@ -1288,11 +966,11 @@ WebInputEventResult EventHandler::updateDragAndDrop(const PlatformMouseEvent& ev

if (targetFrame)

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

} else if (m_dragTarget) {

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

+ m_mouseEventManager->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

+ // We do not explicitly call m_mouseEventManager->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;

}

@@ -1303,11 +981,11 @@ WebInputEventResult EventHandler::updateDragAndDrop(const PlatformMouseEvent& ev

eventResult = 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) {

+ if (!m_shouldOnlyFireDragOverEvent && m_mouseEventManager->dragState().m_dragSrc) {

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

- dispatchDragSrcEvent(EventTypeNames::drag, event);

+ m_mouseEventManager->dispatchDragSrcEvent(EventTypeNames::drag, event);

}

- eventResult = dispatchDragEvent(EventTypeNames::dragover, newTarget, event, dataTransfer);

+ eventResult = m_mouseEventManager->dispatchDragEvent(EventTypeNames::dragover, newTarget, event, dataTransfer);

if (eventResult == WebInputEventResult::NotHandled && findDropZone(newTarget, dataTransfer))

eventResult = WebInputEventResult::HandledSystem;

m_shouldOnlyFireDragOverEvent = false;

@@ -1325,9 +1003,9 @@ void EventHandler::cancelDragAndDrop(const PlatformMouseEvent& event, DataTransf

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);

+ if (m_mouseEventManager->dragState().m_dragSrc)

+ m_mouseEventManager->dispatchDragSrcEvent(EventTypeNames::drag, event);

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

}

clearDragState();

}

@@ -1340,22 +1018,12 @@ WebInputEventResult EventHandler::performDragAndDrop(const PlatformMouseEvent& e

if (targetFrame)

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

} else if (m_dragTarget.get()) {

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

+ result = m_mouseEventManager->dispatchDragEvent(EventTypeNames::drop, m_dragTarget.get(), event, dataTransfer);

}

clearDragState();

return result;

}

-void EventHandler::clearDragHeuristicState()

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

- // the mouse is pressed again.

- m_mousePressed = false;

- m_capturesDragging = false;

- m_mouseDownMayStartDrag = false;

- m_mouseDownMayStartAutoscroll = false;

void EventHandler::clearDragState()

{

m_scrollManager->stopAutoscroll();

@@ -1370,16 +1038,7 @@ void EventHandler::setCapturingMouseEventsNode(Node* 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);

-Node* EventHandler::updateMouseEventTargetNode(Node* targetNode,

- const PlatformMouseEvent& mouseEvent)

+Node* EventHandler::updateMouseEventTargetNode(Node* targetNode)

{

Node* newNodeUnderMouse = targetNode;

@@ -1396,60 +1055,7 @@ Node* EventHandler::updateMouseEventTargetNode(Node* targetNode,

if (newNodeUnderMouse && newNodeUnderMouse->isTextNode())

newNodeUnderMouse = FlatTreeTraversal::parent(*newNodeUnderMouse);

}

- Node* lastNodeUnderMouse = m_nodeUnderMouse;

- m_nodeUnderMouse = newNodeUnderMouse;

- PaintLayer* layerForLastNode = layerForNode(lastNodeUnderMouse);

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

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

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

- // The mouse has moved between frames.

- if (LocalFrame* frame = 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 && (!lastNodeUnderMouse || 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 (lastNodeUnderMouse && lastNodeUnderMouse->document() != m_frame->document()) {

- lastNodeUnderMouse = nullptr;

- m_lastScrollbarUnderMouse = nullptr;

- }

- return lastNodeUnderMouse;

-void EventHandler::updateMouseEventTargetNodeAndSendEvents(Node* targetNode,

- const PlatformMouseEvent& mouseEvent, bool isFrameBoundaryTransition)

- Node* lastNodeUnderMouse = updateMouseEventTargetNode(targetNode, mouseEvent);

- m_pointerEventManager->sendMouseAndPossiblyPointerBoundaryEvents(

- lastNodeUnderMouse, m_nodeUnderMouse, mouseEvent,

- isFrameBoundaryTransition);

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

- updateMouseEventTargetNodeAndSendEvents(targetNode, mouseEvent);

- return m_mouseEventManager->dispatchMouseEvent(m_nodeUnderMouse, eventType,

- mouseEvent, nullptr, clickCount);

+ return newNodeUnderMouse;

}

bool EventHandler::isPointerEventActive(int pointerId)

@@ -1483,113 +1089,17 @@ void EventHandler::elementRemoved(EventTarget* target)

m_pointerEventManager->elementRemoved(target);

}

-// TODO(mustaq): Make PE drive ME dispatch & bookkeeping in EventHandler.

-WebInputEventResult EventHandler::updatePointerTargetAndDispatchEvents(const AtomicString& mouseEventType, Node* targetNode, int clickCount, const PlatformMouseEvent& mouseEvent)

+WebInputEventResult EventHandler::updatePointerTargetAndDispatchEvents(const AtomicString& mouseEventType, Node* targetNode, const PlatformMouseEvent& mouseEvent)

{

ASSERT(mouseEventType == EventTypeNames::mousedown

|| mouseEventType == EventTypeNames::mousemove

|| mouseEventType == EventTypeNames::mouseup);

- Node* lastNodeUnderMouse = updateMouseEventTargetNode(targetNode, mouseEvent);

- Node* newNodeUnderMouse = nullptr;

const auto& eventResult = m_pointerEventManager->sendMousePointerEvent(

- m_nodeUnderMouse, mouseEventType, clickCount, mouseEvent,

- lastNodeUnderMouse, &newNodeUnderMouse);

- m_nodeUnderMouse = newNodeUnderMouse;

+ updateMouseEventTargetNode(targetNode), mouseEventType, mouseEvent);

return eventResult;

}

-void EventHandler::setClickNode(Node* node)

- m_clickNode = node;

-WebInputEventResult EventHandler::handleMouseFocus(const HitTestResult& hitTestResult, InputDeviceCapabilities* sourceCapabilities)

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

- if (hitTestResult.scrollbar() && !m_frame->contentLayoutItem().isNull()) {

- if (hitTestResult.scrollbar()->getScrollableArea() == m_frame->contentLayoutItem().getScrollableArea())

- return WebInputEventResult::NotHandled;

- }

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

- m_frame->document()->updateStyleAndLayoutIgnorePendingStylesheets();

- 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 WebInputEventResult::NotHandled;

- 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()) {

- // TODO(yosin) We should not create |Range| object for calling

- // |isNodeFullyContained()|.

- if (createRange(m_frame->selection().selection().toNormalizedEphemeralRange())->isNodeFullyContained(*element)

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

- return WebInputEventResult::NotHandled;

- }

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

- // mouse focusable node.

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

- return WebInputEventResult::HandledSystem;

- 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 (slideFocusOnShadowHostIfNecessary(*element))

- return WebInputEventResult::HandledSystem;

- if (!page->focusController().setFocusedElement(element, m_frame, FocusParams(SelectionBehaviorOnFocus::None, WebFocusTypeMouse, sourceCapabilities)))

- return WebInputEventResult::HandledSystem;

- } 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(nullptr, m_frame, FocusParams(SelectionBehaviorOnFocus::None, WebFocusTypeNone, sourceCapabilities)))

- return WebInputEventResult::HandledSystem;

- }

- return WebInputEventResult::NotHandled;

-bool EventHandler::slideFocusOnShadowHostIfNecessary(const Element& element)

- if (element.authorShadowRoot() && element.authorShadowRoot()->delegatesFocus()) {

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

- if (element.isShadowIncludingInclusiveAncestorOf(doc->focusedElement())) {

- // If the inner element is already focused, do nothing.

- return true;

- }

- // If the host has a focusable inner element, focus it. Otherwise, the host takes focus.

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

- ASSERT(page);

- Element* found = page->focusController().findFocusableElementInShadowHost(element);

- if (found && element.isShadowIncludingInclusiveAncestorOf(found)) {

- // Use WebFocusTypeForward instead of WebFocusTypeMouse here to mean the focus has slided.

- found->focus(FocusParams(SelectionBehaviorOnFocus::Reset, WebFocusTypeForward, nullptr));

- return true;

- }

- return false;

WebInputEventResult EventHandler::handleWheelEvent(const PlatformWheelEvent& event)

{

#if OS(MACOSX)

@@ -1704,6 +1214,11 @@ bool EventHandler::isScrollbarHandlingGestures() const

return m_scrollManager->isScrollbarHandlingGestures();

}

+void EventHandler::setMouseDownMayStartAutoscroll()

+ m_mouseEventManager->setMouseDownMayStartAutoscroll();

bool EventHandler::shouldApplyTouchAdjustment(const PlatformGestureEvent& event) const

{

if (m_frame->settings() && !m_frame->settings()->touchAdjustmentEnabled())

@@ -1846,7 +1361,7 @@ void EventHandler::updateGestureTargetNodeForMouseEvent(const GestureEventWithHi

HeapVector<Member<LocalFrame>> exitedFrameChain;

// Insert the frame from the disagreement between last frames and entered frames

while (exitedFrameInDocument) {

- Node* lastNodeUnderTap = exitedFrameInDocument->eventHandler().m_nodeUnderMouse.get();

+ Node* lastNodeUnderTap = exitedFrameInDocument->eventHandler().m_mouseEventManager->getNodeUnderMouse();

if (!lastNodeUnderTap)

break;

@@ -1880,14 +1395,14 @@ void EventHandler::updateGestureTargetNodeForMouseEvent(const GestureEventWithHi

size_t indexExitedFrameChain = exitedFrameChain.size();

while (indexExitedFrameChain) {

LocalFrame* leaveFrame = exitedFrameChain[--indexExitedFrameChain];

- leaveFrame->eventHandler().updateMouseEventTargetNodeAndSendEvents(nullptr, fakeMouseMove);

+ leaveFrame->eventHandler().m_mouseEventManager->setNodeUnderMouse(updateMouseEventTargetNode(nullptr), fakeMouseMove);

}

// update the mouseover/mouseenter event

while (indexEnteredFrameChain) {

Frame* parentFrame = enteredFrameChain[--indexEnteredFrameChain]->tree().parent();

if (parentFrame && parentFrame->isLocalFrame())

- toLocalFrame(parentFrame)->eventHandler().updateMouseEventTargetNodeAndSendEvents(toHTMLFrameOwnerElement(enteredFrameChain[indexEnteredFrameChain]->owner()), fakeMouseMove);

+ toLocalFrame(parentFrame)->eventHandler().m_mouseEventManager->setNodeUnderMouse(updateMouseEventTargetNode(toHTMLFrameOwnerElement(enteredFrameChain[indexEnteredFrameChain]->owner())), fakeMouseMove);

}

@@ -2006,11 +1521,11 @@ WebInputEventResult EventHandler::sendContextMenuEvent(const PlatformMouseEvent&

return WebInputEventResult::NotHandled;

// Clear mouse press state to avoid initiating a drag while context menu is up.

- m_mousePressed = false;

+ m_mouseEventManager->setMousePressed(false);

LayoutPoint positionInContents = v->rootFrameToContents(event.position());

HitTestRequest request(HitTestRequest::Active);

- MouseEventWithHitTestResults mev = m_frame->document()->prepareMouseEvent(request, positionInContents, event);

- // Since |Document::prepareMouseEvent()| modifies layout tree for setting

+ MouseEventWithHitTestResults mev = m_frame->document()->performMouseEventHitTest(request, positionInContents, event);

+ // Since |Document::performMouseEventHitTest| modifies layout tree for setting

// hover element, we need to update layout tree for requirement of

// |SelectionController::sendContextMenuEvent()|.

m_frame->document()->updateStyleAndLayoutIgnorePendingStylesheets();

@@ -2018,7 +1533,7 @@ WebInputEventResult EventHandler::sendContextMenuEvent(const PlatformMouseEvent&

selectionController().sendContextMenuEvent(mev, positionInContents);

Node* targetNode = overrideTargetNode ? overrideTargetNode : mev.innerNode();

- return dispatchMouseEvent(EventTypeNames::contextmenu, targetNode, 0, event);

+ return m_mouseEventManager->dispatchMouseEvent(updateMouseEventTargetNode(targetNode), EventTypeNames::contextmenu, event, 0);

}

WebInputEventResult EventHandler::sendContextMenuEventForKey(Element* overrideTargetElement)

@@ -2114,68 +1629,12 @@ bool EventHandler::cursorUpdatePending()

void EventHandler::dispatchFakeMouseMoveEventSoon()

{

- if (m_mousePressed)

- return;

- if (m_mousePositionIsUnknown)

- return;

- Settings* settings = m_frame->settings();

- if (settings && !settings->deviceSupportsMouse())

- return;

- // Reschedule the timer, to prevent dispatching mouse move events

- // during a scroll. This avoids a potential source of scroll jank.

- if (m_fakeMouseMoveEventTimer.isActive())

- m_fakeMouseMoveEventTimer.stop();

- m_fakeMouseMoveEventTimer.startOneShot(fakeMouseMoveInterval, BLINK_FROM_HERE);

+ m_mouseEventManager->dispatchFakeMouseMoveEventSoon();

}

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(TimerBase* 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;

- PlatformMouseEvent fakeMouseMoveEvent(m_lastKnownMousePosition, m_lastKnownMouseGlobalPosition, WebPointerProperties::Button::NoButton, PlatformEvent::MouseMoved, 0, static_cast<PlatformEvent::Modifiers>(KeyboardEventManager::getCurrentModifierState()), PlatformMouseEvent::RealOrIndistinguishable, monotonicallyIncreasingTime(), WebPointerProperties::PointerType::Mouse);

- handleMouseMoveEvent(fakeMouseMoveEvent);

-void EventHandler::cancelFakeMouseMoveEvent()

- m_fakeMouseMoveEventTimer.stop();

-bool EventHandler::isCursorVisible() const

- return m_frame->page()->isCursorVisible();

+ m_mouseEventManager->dispatchFakeMouseMoveEventSoonInQuad(quad);

}

void EventHandler::setResizingFrameSet(HTMLFrameSetElement* frameSet)

@@ -2199,7 +1658,7 @@ void EventHandler::hoverTimerFired(TimerBase*)

if (LayoutViewItem layoutItem = m_frame->contentLayoutItem()) {

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

HitTestRequest request(HitTestRequest::Move);

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

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

layoutItem.hitTest(result);

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

}

@@ -2242,203 +1701,19 @@ WebInputEventResult EventHandler::keyEvent(const WebKeyboardEvent& initialKeyEve

void EventHandler::defaultKeyboardEventHandler(KeyboardEvent* event)

{

- m_keyboardEventManager->defaultKeyboardEventHandler(event, m_mousePressNode);

-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);

- }

+ m_keyboardEventManager->defaultKeyboardEventHandler(event, m_mouseEventManager->mousePressNode());

}

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;

+ m_mouseEventManager->dragSourceEndedAt(event, operation);

}

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->isConnected())

- dragState().m_dragSrc = rootEditableElement;

-// returns if we should continue "default processing", i.e., whether eventhandler canceled

-WebInputEventResult EventHandler::dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent& event)

- return dispatchDragEvent(eventType, dragState().m_dragSrc.get(), event, dragState().m_dragDataTransfer.get());

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

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

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

- IntPoint adjustedPoint = gestureEvent.position();

- unsigned modifiers = gestureEvent.getModifiers();

- // TODO(mustaq): Suppressing long-tap MouseEvents could break

- // drag-drop. Will do separately because of the risk. crbug.com/606938.

- PlatformMouseEvent mouseDownEvent(adjustedPoint, gestureEvent.globalPosition(), WebPointerProperties::Button::Left, PlatformEvent::MousePressed, 1,

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

- PlatformMouseEvent::FromTouch, WTF::monotonicallyIncreasingTime(), WebPointerProperties::PointerType::Mouse);

- m_mouseDown = mouseDownEvent;

- PlatformMouseEvent mouseDragEvent(adjustedPoint, gestureEvent.globalPosition(), WebPointerProperties::Button::Left, PlatformEvent::MouseMoved, 1,

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

- PlatformMouseEvent::FromTouch, WTF::monotonicallyIncreasingTime(), WebPointerProperties::PointerType::Mouse);

- HitTestRequest request(HitTestRequest::ReadOnly);

- MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseDragEvent);

- m_mouseDownMayStartDrag = true;

- dragState().m_dragSrc = nullptr;

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

- return handleDrag(mev, DragInitiator::Touch);

- }

- return false;

-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->contentLayoutItem().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 && !selectionController().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()) {

- IntRect boundingIncludingDescendants = layoutObject->absoluteBoundingBoxRectIncludingDescendants();

- IntSize delta = m_mouseDownPos - boundingIncludingDescendants.location();

- 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) == WebInputEventResult::NotHandled

- && !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;

+ if (m_mouseEventManager->dragState().m_dragSrc && !m_mouseEventManager->dragState().m_dragSrc->isConnected())

+ m_mouseEventManager->dragState().m_dragSrc = rootEditableElement;

}

bool EventHandler::handleTextInputEvent(const String& text, Event* underlyingEvent, TextEventInputType inputType)

@@ -2511,13 +1786,6 @@ WebInputEventResult EventHandler::handleTouchEvent(const PlatformTouchEvent& eve

return m_pointerEventManager->handleTouchEvents(event);

}

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

- m_mousePositionIsUnknown = false;

- m_lastKnownMousePosition = event.position();

- m_lastKnownMouseGlobalPosition = event.globalPosition();

WebInputEventResult EventHandler::passMousePressEventToSubframe(MouseEventWithHitTestResults& mev, LocalFrame* subframe)

{

selectionController().passMousePressEventToSubframe(mev);

@@ -2529,7 +1797,7 @@ WebInputEventResult EventHandler::passMousePressEventToSubframe(MouseEventWithHi

WebInputEventResult EventHandler::passMouseMoveEventToSubframe(MouseEventWithHitTestResults& mev, LocalFrame* subframe, HitTestResult* hoveredNode)

{

- if (m_mouseDownMayStartDrag)

+ if (m_mouseEventManager->mouseDownMayStartDrag())

return WebInputEventResult::NotHandled;

WebInputEventResult result = subframe->eventHandler().handleMouseMoveOrLeaveEvent(mev.event(), hoveredNode);

if (result != WebInputEventResult::NotHandled)

@@ -2545,19 +1813,6 @@ WebInputEventResult EventHandler::passMouseReleaseEventToSubframe(MouseEventWith

return WebInputEventResult::HandledSystem;

}

-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);

FrameHost* EventHandler::frameHost() const

{

if (!m_frame->page())