| /* |
| * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved. |
| * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org) |
| * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies) |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "core/page/EventHandler.h" |
| |
| #include "bindings/v8/ExceptionStatePlaceholder.h" |
| #include "core/HTMLNames.h" |
| #include "core/SVGNames.h" |
| #include "core/clipboard/Clipboard.h" |
| #include "core/clipboard/DataObject.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/DocumentMarkerController.h" |
| #include "core/dom/FullscreenElementStack.h" |
| #include "core/dom/NodeRenderingTraversal.h" |
| #include "core/dom/TouchList.h" |
| #include "core/dom/shadow/ShadowRoot.h" |
| #include "core/editing/Editor.h" |
| #include "core/editing/FrameSelection.h" |
| #include "core/editing/TextIterator.h" |
| #include "core/editing/htmlediting.h" |
| #include "core/events/DOMWindowEventQueue.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/FrameView.h" |
| #include "core/frame/LocalFrame.h" |
| #include "core/html/HTMLDialogElement.h" |
| #include "core/html/HTMLFrameElementBase.h" |
| #include "core/html/HTMLFrameSetElement.h" |
| #include "core/html/HTMLInputElement.h" |
| #include "core/loader/FrameLoader.h" |
| #include "core/loader/FrameLoaderClient.h" |
| #include "core/page/AutoscrollController.h" |
| #include "core/page/BackForwardClient.h" |
| #include "core/page/Chrome.h" |
| #include "core/page/ChromeClient.h" |
| #include "core/page/DragController.h" |
| #include "core/page/DragState.h" |
| #include "core/page/EditorClient.h" |
| #include "core/page/FocusController.h" |
| #include "core/page/FrameTree.h" |
| #include "core/inspector/InspectorController.h" |
| #include "core/page/MouseEventWithHitTestResults.h" |
| #include "core/page/Page.h" |
| #include "core/frame/Settings.h" |
| #include "core/page/SpatialNavigation.h" |
| #include "core/page/TouchAdjustment.h" |
| #include "core/rendering/HitTestRequest.h" |
| #include "core/rendering/HitTestResult.h" |
| #include "core/rendering/RenderFlowThread.h" |
| #include "core/rendering/RenderLayer.h" |
| #include "core/rendering/RenderTextControlSingleLine.h" |
| #include "core/rendering/RenderView.h" |
| #include "core/rendering/RenderWidget.h" |
| #include "core/rendering/style/RenderStyle.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 WebCore { |
| |
| 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 }; |
| |
| 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(unsigned deltaMode) |
| { |
| switch (deltaMode) { |
| case WheelEvent::DOM_DELTA_PAGE: |
| return ScrollByPage; |
| case WheelEvent::DOM_DELTA_LINE: |
| return ScrollByLine; |
| case WheelEvent::DOM_DELTA_PIXEL: |
| return ScrollByPixel; |
| default: |
| return 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.targetNode(); |
| if (!targetNode || !targetNode->parentNode()) |
| return true; |
| return targetNode->isShadowRoot() && isHTMLInputElement(*toShadowRoot(targetNode)->host()); |
| } |
| |
| EventHandler::EventHandler(LocalFrame* frame) |
| : m_frame(frame) |
| , m_mousePressed(false) |
| , m_capturesDragging(false) |
| , 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_mouseDownWasInSubframe(false) |
| , m_fakeMouseMoveEventTimer(this, &EventHandler::fakeMouseMoveEventTimerFired) |
| , m_svgPan(false) |
| , m_resizeScrollableArea(0) |
| , 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_lastHitTestResultOverWidget(false) |
| , m_maxMouseMovedDuration(0) |
| , m_baseEventType(PlatformEvent::NoType) |
| , m_didStartDrag(false) |
| , m_longTapShouldInvokeContextMenu(false) |
| , m_activeIntervalTimer(this, &EventHandler::activeIntervalTimerFired) |
| , m_lastShowPressTimestamp(0) |
| { |
| } |
| |
| EventHandler::~EventHandler() |
| { |
| ASSERT(!m_fakeMouseMoveEventTimer.isActive()); |
| } |
| |
| void EventHandler::trace(Visitor* visitor) |
| { |
| visitor->trace(m_mousePressNode); |
| visitor->trace(m_capturingMouseEventsNode); |
| visitor->trace(m_nodeUnderMouse); |
| visitor->trace(m_lastNodeUnderMouse); |
| visitor->trace(m_clickNode); |
| visitor->trace(m_dragTarget); |
| visitor->trace(m_frameSetBeingResized); |
| visitor->trace(m_latchedWheelEventNode); |
| visitor->trace(m_previousWheelScrolledNode); |
| visitor->trace(m_targetForTouchID); |
| visitor->trace(m_touchSequenceDocument); |
| visitor->trace(m_scrollGestureHandlingNode); |
| visitor->trace(m_previousGestureScrolledNode); |
| visitor->trace(m_lastDeferredTapElement); |
| } |
| |
| DragState& EventHandler::dragState() |
| { |
| #if ENABLE(OILPAN) |
| DEFINE_STATIC_LOCAL(Persistent<DragState>, state, (new DragState())); |
| return *state; |
| #else |
| DEFINE_STATIC_LOCAL(DragState, state, ()); |
| return state; |
| #endif |
| } |
| |
| void EventHandler::clear() |
| { |
| m_hoverTimer.stop(); |
| m_cursorUpdateTimer.stop(); |
| m_fakeMouseMoveEventTimer.stop(); |
| m_activeIntervalTimer.stop(); |
| m_resizeScrollableArea = 0; |
| 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_lastHitTestResultOverWidget = false; |
| m_previousGestureScrolledNode = nullptr; |
| m_scrollbarHandlingScrollGesture = nullptr; |
| m_maxMouseMovedDuration = 0; |
| m_baseEventType = PlatformEvent::NoType; |
| m_didStartDrag = false; |
| m_touchPressed = false; |
| m_mouseDownMayStartSelect = false; |
| m_mouseDownMayStartDrag = false; |
| m_lastShowPressTimestamp = 0; |
| m_lastDeferredTapElement = nullptr; |
| } |
| |
| void EventHandler::nodeWillBeRemoved(Node& nodeToBeRemoved) |
| { |
| if (!nodeToBeRemoved.containsIncludingShadowDOM(m_clickNode.get())) |
| return; |
| if (nodeToBeRemoved.isInShadowTree()) { |
| m_clickNode = nodeToBeRemoved.parentOrShadowHostNode(); |
| } else { |
| // 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; |
| } |
| } |
| |
| static void setSelectionIfNeeded(FrameSelection& selection, const VisibleSelection& newSelection) |
| { |
| if (selection.selection() != newSelection) |
| selection.setSelection(newSelection); |
| } |
| |
| static inline bool dispatchSelectStart(Node* node) |
| { |
| if (!node || !node->renderer()) |
| return true; |
| |
| return node->dispatchEvent(Event::createCancelableBubble(EventTypeNames::selectstart)); |
| } |
| |
| static VisibleSelection expandSelectionToRespectUserSelectAll(Node* targetNode, const VisibleSelection& selection) |
| { |
| Node* rootUserSelectAll = Position::rootUserSelectAllForNode(targetNode); |
| if (!rootUserSelectAll) |
| return selection; |
| |
| VisibleSelection newSelection(selection); |
| newSelection.setBase(positionBeforeNode(rootUserSelectAll).upstream(CanCrossEditingBoundary)); |
| newSelection.setExtent(positionAfterNode(rootUserSelectAll).downstream(CanCrossEditingBoundary)); |
| |
| return newSelection; |
| } |
| |
| bool EventHandler::updateSelectionForMouseDownDispatchingSelectStart(Node* targetNode, const VisibleSelection& selection, TextGranularity granularity) |
| { |
| if (Position::nodeIsUserSelectNone(targetNode)) |
| return false; |
| |
| if (!dispatchSelectStart(targetNode)) |
| return false; |
| |
| if (selection.isRange()) |
| m_selectionInitiationState = ExtendedSelection; |
| else { |
| granularity = CharacterGranularity; |
| m_selectionInitiationState = PlacedCaret; |
| } |
| |
| m_frame->selection().setNonDirectionalSelectionIfNeeded(selection, granularity); |
| |
| return true; |
| } |
| |
| void EventHandler::selectClosestWordFromHitTestResult(const HitTestResult& result, AppendTrailingWhitespace appendTrailingWhitespace) |
| { |
| Node* innerNode = result.targetNode(); |
| VisibleSelection newSelection; |
| |
| if (innerNode && innerNode->renderer()) { |
| VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint())); |
| if (pos.isNotNull()) { |
| newSelection = VisibleSelection(pos); |
| newSelection.expandUsingGranularity(WordGranularity); |
| } |
| |
| if (appendTrailingWhitespace == ShouldAppendTrailingWhitespace && newSelection.isRange()) |
| newSelection.appendTrailingWhitespace(); |
| |
| updateSelectionForMouseDownDispatchingSelectStart(innerNode, expandSelectionToRespectUserSelectAll(innerNode, newSelection), WordGranularity); |
| } |
| } |
| |
| void EventHandler::selectClosestMisspellingFromHitTestResult(const HitTestResult& result, AppendTrailingWhitespace appendTrailingWhitespace) |
| { |
| Node* innerNode = result.targetNode(); |
| VisibleSelection newSelection; |
| |
| if (innerNode && innerNode->renderer()) { |
| VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint())); |
| Position start = pos.deepEquivalent(); |
| Position end = pos.deepEquivalent(); |
| if (pos.isNotNull()) { |
| WillBeHeapVector<DocumentMarker*> markers = innerNode->document().markers().markersInRange(makeRange(pos, pos).get(), DocumentMarker::MisspellingMarkers()); |
| if (markers.size() == 1) { |
| start.moveToOffset(markers[0]->startOffset()); |
| end.moveToOffset(markers[0]->endOffset()); |
| newSelection = VisibleSelection(start, end); |
| } |
| } |
| |
| if (appendTrailingWhitespace == ShouldAppendTrailingWhitespace && newSelection.isRange()) |
| newSelection.appendTrailingWhitespace(); |
| |
| updateSelectionForMouseDownDispatchingSelectStart(innerNode, expandSelectionToRespectUserSelectAll(innerNode, newSelection), WordGranularity); |
| } |
| } |
| |
| void EventHandler::selectClosestWordFromMouseEvent(const MouseEventWithHitTestResults& result) |
| { |
| if (m_mouseDownMayStartSelect) { |
| selectClosestWordFromHitTestResult(result.hitTestResult(), |
| (result.event().clickCount() == 2 && m_frame->editor().isSelectTrailingWhitespaceEnabled()) ? ShouldAppendTrailingWhitespace : DontAppendTrailingWhitespace); |
| } |
| } |
| |
| void EventHandler::selectClosestMisspellingFromMouseEvent(const MouseEventWithHitTestResults& result) |
| { |
| if (m_mouseDownMayStartSelect) { |
| selectClosestMisspellingFromHitTestResult(result.hitTestResult(), |
| (result.event().clickCount() == 2 && m_frame->editor().isSelectTrailingWhitespaceEnabled()) ? ShouldAppendTrailingWhitespace : DontAppendTrailingWhitespace); |
| } |
| } |
| |
| void EventHandler::selectClosestWordOrLinkFromMouseEvent(const MouseEventWithHitTestResults& result) |
| { |
| if (!result.hitTestResult().isLiveLink()) |
| return selectClosestWordFromMouseEvent(result); |
| |
| Node* innerNode = result.targetNode(); |
| |
| if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) { |
| VisibleSelection newSelection; |
| Element* URLElement = result.hitTestResult().URLElement(); |
| VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint())); |
| if (pos.isNotNull() && pos.deepEquivalent().deprecatedNode()->isDescendantOf(URLElement)) |
| newSelection = VisibleSelection::selectionFromContentsOfNode(URLElement); |
| |
| updateSelectionForMouseDownDispatchingSelectStart(innerNode, expandSelectionToRespectUserSelectAll(innerNode, newSelection), WordGranularity); |
| } |
| } |
| |
| bool EventHandler::handleMousePressEventDoubleClick(const MouseEventWithHitTestResults& event) |
| { |
| TRACE_EVENT0("webkit", "EventHandler::handleMousePressEventDoubleClick"); |
| |
| if (event.event().button() != LeftButton) |
| return false; |
| |
| if (m_frame->selection().isRange()) { |
| // A double-click when range is already selected |
| // should not change the selection. So, do not call |
| // selectClosestWordFromMouseEvent, but do set |
| // m_beganSelectingText to prevent handleMouseReleaseEvent |
| // from setting caret selection. |
| m_selectionInitiationState = ExtendedSelection; |
| } else { |
| selectClosestWordFromMouseEvent(event); |
| } |
| return true; |
| } |
| |
| bool EventHandler::handleMousePressEventTripleClick(const MouseEventWithHitTestResults& event) |
| { |
| TRACE_EVENT0("webkit", "EventHandler::handleMousePressEventTripleClick"); |
| |
| if (event.event().button() != LeftButton) |
| return false; |
| |
| Node* innerNode = event.targetNode(); |
| if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect)) |
| return false; |
| |
| VisibleSelection newSelection; |
| VisiblePosition pos(innerNode->renderer()->positionForPoint(event.localPoint())); |
| if (pos.isNotNull()) { |
| newSelection = VisibleSelection(pos); |
| newSelection.expandUsingGranularity(ParagraphGranularity); |
| } |
| |
| return updateSelectionForMouseDownDispatchingSelectStart(innerNode, expandSelectionToRespectUserSelectAll(innerNode, newSelection), ParagraphGranularity); |
| } |
| |
| static int textDistance(const Position& start, const Position& end) |
| { |
| RefPtrWillBeRawPtr<Range> range = Range::create(*start.document(), start, end); |
| return TextIterator::rangeLength(range.get(), true); |
| } |
| |
| bool EventHandler::handleMousePressEventSingleClick(const MouseEventWithHitTestResults& event) |
| { |
| TRACE_EVENT0("webkit", "EventHandler::handleMousePressEventSingleClick"); |
| |
| m_frame->document()->updateLayoutIgnorePendingStylesheets(); |
| Node* innerNode = event.targetNode(); |
| if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect)) |
| return false; |
| |
| // Extend the selection if the Shift key is down, unless the click is in a link. |
| bool extendSelection = event.event().shiftKey() && !event.isOverLink(); |
| |
| // Don't restart the selection when the mouse is pressed on an |
| // existing selection so we can allow for text dragging. |
| if (FrameView* view = m_frame->view()) { |
| LayoutPoint vPoint = view->windowToContents(event.event().position()); |
| if (!extendSelection && m_frame->selection().contains(vPoint)) { |
| m_mouseDownWasSingleClickInSelection = true; |
| return false; |
| } |
| } |
| |
| VisiblePosition visiblePos(innerNode->renderer()->positionForPoint(event.localPoint())); |
| if (visiblePos.isNull()) |
| visiblePos = VisiblePosition(firstPositionInOrBeforeNode(innerNode), DOWNSTREAM); |
| Position pos = visiblePos.deepEquivalent(); |
| |
| VisibleSelection newSelection = m_frame->selection().selection(); |
| TextGranularity granularity = CharacterGranularity; |
| |
| if (extendSelection && newSelection.isCaretOrRange()) { |
| VisibleSelection selectionInUserSelectAll(expandSelectionToRespectUserSelectAll(innerNode, VisibleSelection(VisiblePosition(pos)))); |
| if (selectionInUserSelectAll.isRange()) { |
| if (comparePositions(selectionInUserSelectAll.start(), newSelection.start()) < 0) |
| pos = selectionInUserSelectAll.start(); |
| else if (comparePositions(newSelection.end(), selectionInUserSelectAll.end()) < 0) |
| pos = selectionInUserSelectAll.end(); |
| } |
| |
| if (!m_frame->editor().behavior().shouldConsiderSelectionAsDirectional()) { |
| if (pos.isNotNull()) { |
| // See <rdar://problem/3668157> REGRESSION (Mail): shift-click deselects when selection |
| // was created right-to-left |
| Position start = newSelection.start(); |
| Position end = newSelection.end(); |
| int distanceToStart = textDistance(start, pos); |
| int distanceToEnd = textDistance(pos, end); |
| if (distanceToStart <= distanceToEnd) |
| newSelection = VisibleSelection(end, pos); |
| else |
| newSelection = VisibleSelection(start, pos); |
| } |
| } else |
| newSelection.setExtent(pos); |
| |
| if (m_frame->selection().granularity() != CharacterGranularity) { |
| granularity = m_frame->selection().granularity(); |
| newSelection.expandUsingGranularity(m_frame->selection().granularity()); |
| } |
| } else { |
| newSelection = expandSelectionToRespectUserSelectAll(innerNode, VisibleSelection(visiblePos)); |
| } |
| |
| // Updating the selection is considered side-effect of the event and so it doesn't impact the handled state. |
| updateSelectionForMouseDownDispatchingSelectStart(innerNode, newSelection, granularity); |
| return false; |
| } |
| |
| static inline bool canMouseDownStartSelect(Node* node) |
| { |
| if (!node || !node->renderer()) |
| return true; |
| |
| if (!node->canStartSelection()) |
| return false; |
| |
| return true; |
| } |
| |
| bool EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& event) |
| { |
| TRACE_EVENT0("webkit", "EventHandler::handleMousePressEvent"); |
| |
| // Reset drag state. |
| dragState().m_dragSrc = nullptr; |
| |
| cancelFakeMouseMoveEvent(); |
| |
| m_frame->document()->updateLayoutIgnorePendingStylesheets(); |
| |
| if (ScrollView* scrollView = m_frame->view()) { |
| if (scrollView->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.targetNode()) && !event.scrollbar(); |
| |
| m_mouseDownMayStartDrag = singleClick; |
| |
| m_mouseDownWasSingleClickInSelection = false; |
| |
| m_mouseDown = event.event(); |
| |
| if (event.isOverWidget() && passWidgetMouseDownEventToWidget(event)) |
| return true; |
| |
| 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()->windowToContents(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.targetNode(); |
| |
| 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->renderBox() && m_mousePressNode->renderBox()->canBeProgramaticallyScrolled()); |
| |
| return swallowEvent; |
| } |
| |
| bool EventHandler::handleMouseDraggedEvent(const MouseEventWithHitTestResults& event) |
| { |
| TRACE_EVENT0("webkit", "EventHandler::handleMouseDraggedEvent"); |
| |
| if (!m_mousePressed) |
| return false; |
| |
| if (handleDrag(event, ShouldCheckDragHysteresis)) |
| return true; |
| |
| Node* targetNode = event.targetNode(); |
| if (event.event().button() != LeftButton || !targetNode) |
| return false; |
| |
| RenderObject* renderer = targetNode->renderer(); |
| if (!renderer) { |
| Node* parent = NodeRenderingTraversal::parent(targetNode); |
| if (!parent) |
| return false; |
| |
| renderer = parent->renderer(); |
| if (!renderer || !renderer->isListBox()) |
| return false; |
| } |
| |
| m_mouseDownMayStartDrag = false; |
| |
| if (m_mouseDownMayStartAutoscroll && !panScrollInProgress()) { |
| if (AutoscrollController* controller = autoscrollController()) { |
| controller->startAutoscrollForSelection(renderer); |
| m_mouseDownMayStartAutoscroll = false; |
| } |
| } |
| |
| if (m_selectionInitiationState != ExtendedSelection) { |
| HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent); |
| HitTestResult result(m_mouseDownPos); |
| m_frame->document()->renderView()->hitTest(request, result); |
| |
| updateSelectionForMouseDrag(result); |
| } |
| updateSelectionForMouseDrag(event.hitTestResult()); |
| return true; |
| } |
| |
| void EventHandler::updateSelectionForMouseDrag() |
| { |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return; |
| RenderView* renderer = m_frame->contentRenderer(); |
| if (!renderer) |
| return; |
| |
| HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::Move | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent); |
| HitTestResult result(view->windowToContents(m_lastKnownMousePosition)); |
| renderer->hitTest(request, result); |
| updateSelectionForMouseDrag(result); |
| } |
| |
| void EventHandler::updateSelectionForMouseDrag(const HitTestResult& hitTestResult) |
| { |
| if (!m_mouseDownMayStartSelect) |
| return; |
| |
| Node* target = hitTestResult.targetNode(); |
| if (!target) |
| return; |
| |
| VisiblePosition targetPosition = m_frame->selection().selection().visiblePositionRespectingEditingBoundary(hitTestResult.localPoint(), target); |
| // Don't modify the selection if we're not on a node. |
| if (targetPosition.isNull()) |
| return; |
| |
| // Restart the selection if this is the first mouse move. This work is usually |
| // done in handleMousePressEvent, but not if the mouse press was on an existing selection. |
| VisibleSelection newSelection = m_frame->selection().selection(); |
| |
| // Special case to limit selection to the containing block for SVG text. |
| // FIXME: Isn't there a better non-SVG-specific way to do this? |
| if (Node* selectionBaseNode = newSelection.base().deprecatedNode()) |
| if (RenderObject* selectionBaseRenderer = selectionBaseNode->renderer()) |
| if (selectionBaseRenderer->isSVGText()) |
| if (target->renderer()->containingBlock() != selectionBaseRenderer->containingBlock()) |
| return; |
| |
| if (m_selectionInitiationState == HaveNotStartedSelection && !dispatchSelectStart(target)) |
| return; |
| |
| if (m_selectionInitiationState != ExtendedSelection) { |
| // Always extend selection here because it's caused by a mouse drag |
| m_selectionInitiationState = ExtendedSelection; |
| newSelection = VisibleSelection(targetPosition); |
| } |
| |
| if (RuntimeEnabledFeatures::userSelectAllEnabled()) { |
| Node* rootUserSelectAllForMousePressNode = Position::rootUserSelectAllForNode(m_mousePressNode.get()); |
| 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->renderer()->positionForPoint(hitTestResult.localPoint()), m_mousePressNode->renderer()->positionForPoint(m_dragStartPos)) < 0) |
| newSelection.setBase(positionAfterNode(rootUserSelectAllForMousePressNode).downstream(CanCrossEditingBoundary)); |
| |
| Node* rootUserSelectAllForTarget = Position::rootUserSelectAllForNode(target); |
| if (rootUserSelectAllForTarget && m_mousePressNode->renderer() && comparePositions(target->renderer()->positionForPoint(hitTestResult.localPoint()), m_mousePressNode->renderer()->positionForPoint(m_dragStartPos)) < 0) |
| newSelection.setExtent(positionBeforeNode(rootUserSelectAllForTarget).upstream(CanCrossEditingBoundary)); |
| else if (rootUserSelectAllForTarget && m_mousePressNode->renderer()) |
| newSelection.setExtent(positionAfterNode(rootUserSelectAllForTarget).downstream(CanCrossEditingBoundary)); |
| else |
| newSelection.setExtent(targetPosition); |
| } |
| } else { |
| newSelection.setExtent(targetPosition); |
| } |
| |
| if (m_frame->selection().granularity() != CharacterGranularity) |
| newSelection.expandUsingGranularity(m_frame->selection().granularity()); |
| |
| m_frame->selection().setNonDirectionalSelectionIfNeeded(newSelection, m_frame->selection().granularity(), |
| FrameSelection::AdjustEndpointsAtBidiBoundary); |
| } |
| |
| bool EventHandler::handleMouseReleaseEvent(const MouseEventWithHitTestResults& event) |
| { |
| 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; |
| m_mouseDownWasInSubframe = false; |
| |
| bool handled = 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() |
| && m_frame->selection().isRange() |
| && event.event().button() != RightButton) { |
| VisibleSelection newSelection; |
| Node* node = event.targetNode(); |
| bool caretBrowsing = m_frame->settings() && m_frame->settings()->caretBrowsingEnabled(); |
| if (node && node->renderer() && (caretBrowsing || node->rendererIsEditable())) { |
| VisiblePosition pos = VisiblePosition(node->renderer()->positionForPoint(event.localPoint())); |
| newSelection = VisibleSelection(pos); |
| } |
| |
| setSelectionIfNeeded(m_frame->selection(), newSelection); |
| |
| handled = true; |
| } |
| |
| m_frame->selection().notifyRendererOfSelectionChange(UserTriggered); |
| |
| m_frame->selection().selectFrameElementInParentIfFullySelected(); |
| |
| if (event.event().button() == MiddleButton && !event.isOverLink()) { |
| // Ignore handled, since we want to paste to where the caret was placed anyway. |
| handled = handlePasteGlobalSelection(event.event()) || handled; |
| } |
| |
| return handled; |
| } |
| |
| #if OS(WIN) |
| |
| void EventHandler::startPanScrolling(RenderObject* renderer) |
| { |
| if (!renderer->isBox()) |
| return; |
| AutoscrollController* controller = autoscrollController(); |
| if (!controller) |
| return; |
| controller->startPanScrolling(toRenderBox(renderer), lastKnownMousePosition()); |
| invalidateClick(); |
| } |
| |
| #endif // OS(WIN) |
| |
| AutoscrollController* EventHandler::autoscrollController() const |
| { |
| if (Page* page = m_frame->page()) |
| return &page->autoscrollController(); |
| return 0; |
| } |
| |
| bool EventHandler::panScrollInProgress() const |
| { |
| return autoscrollController() && autoscrollController()->panScrollInProgress(); |
| } |
| |
| HitTestResult EventHandler::hitTestResultAtPoint(const LayoutPoint& point, HitTestRequest::HitTestRequestType hitType, const LayoutSize& padding) |
| { |
| TRACE_EVENT0("webkit", "EventHandler::hitTestResultAtPoint"); |
| |
| // We always send hitTestResultAtPoint to the main frame if we have one, |
| // otherwise we might hit areas that are obscured by higher frames. |
| if (Page* page = m_frame->page()) { |
| LocalFrame* mainFrame = page->mainFrame()->isLocalFrame() ? page->deprecatedLocalMainFrame() : 0; |
| if (mainFrame && m_frame != mainFrame) { |
| FrameView* frameView = m_frame->view(); |
| FrameView* mainView = mainFrame->view(); |
| if (frameView && mainView) { |
| IntPoint mainFramePoint = mainView->rootViewToContents(frameView->contentsToRootView(roundedIntPoint(point))); |
| return mainFrame->eventHandler().hitTestResultAtPoint(mainFramePoint, hitType, padding); |
| } |
| } |
| } |
| |
| HitTestResult result(point, padding.height(), padding.width(), padding.height(), padding.width()); |
| |
| // RenderView::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->contentRenderer() || !m_frame->view() || !m_frame->view()->didFirstLayout()) |
| return result; |
| |
| // hitTestResultAtPoint is specifically used to hitTest into all frames, thus it always allows child frame content. |
| HitTestRequest request(hitType | HitTestRequest::AllowChildFrameContent); |
| m_frame->contentRenderer()->hitTest(request, result); |
| if (!request.readOnly()) |
| m_frame->document()->updateHoverActiveState(request, result.innerElement()); |
| |
| if (request.disallowsShadowContent()) |
| result.setToNodesInDocumentTreeScope(); |
| |
| return result; |
| } |
| |
| void EventHandler::stopAutoscroll() |
| { |
| if (AutoscrollController* controller = autoscrollController()) |
| controller->stopAutoscroll(); |
| } |
| |
| Node* EventHandler::mousePressNode() const |
| { |
| return m_mousePressNode.get(); |
| } |
| |
| 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->renderer()) |
| return false; |
| |
| RenderBox* curBox = node->renderer()->enclosingBox(); |
| while (curBox && !curBox->isRenderView()) { |
| ScrollDirection 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; |
| } |
| |
| 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(); |
| if (scroll(direction, granularity, startingNode)) |
| return true; |
| LocalFrame* frame = m_frame; |
| FrameView* view = frame->view(); |
| if (view && view->scroll(direction, granularity)) |
| return true; |
| 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 0; |
| |
| RenderObject* renderer = node->renderer(); |
| if (!renderer || !renderer->isWidget()) |
| return 0; |
| |
| // FIXME: This explicit check is needed only until RemoteFrames have RemoteFrameViews. |
| if (isHTMLFrameElementBase(node) && toHTMLFrameElementBase(node)->contentFrame() && toHTMLFrameElementBase(node)->contentFrame()->isRemoteFrameTemporary()) |
| return 0; |
| |
| Widget* widget = toRenderWidget(renderer)->widget(); |
| if (!widget || !widget->isFrameView()) |
| return 0; |
| |
| return &toFrameView(widget)->frame(); |
| } |
| |
| static LocalFrame* subframeForHitTestResult(const MouseEventWithHitTestResults& hitTestResult) |
| { |
| if (!hitTestResult.isOverWidget()) |
| return 0; |
| return subframeForTargetNode(hitTestResult.targetNode()); |
| } |
| |
| static bool isSubmitImage(Node* node) |
| { |
| return isHTMLInputElement(node) && toHTMLInputElement(node)->isImageButton(); |
| } |
| |
| bool EventHandler::useHandCursor(Node* node, bool isOverLink) |
| { |
| if (!node) |
| return false; |
| |
| return ((isOverLink || isSubmitImage(node)) && !node->rendererIsEditable()); |
| } |
| |
| void EventHandler::cursorUpdateTimerFired(Timer<EventHandler>*) |
| { |
| ASSERT(m_frame); |
| ASSERT(m_frame->document()); |
| |
| updateCursor(); |
| } |
| |
| void EventHandler::updateCursor() |
| { |
| if (m_mousePositionIsUnknown) |
| return; |
| |
| FrameView* view = m_frame->view(); |
| if (!view || !view->shouldSetCursor()) |
| return; |
| |
| RenderView* renderView = view->renderView(); |
| if (!renderView) |
| return; |
| |
| m_frame->document()->updateLayout(); |
| |
| HitTestRequest request(HitTestRequest::ReadOnly); |
| HitTestResult result(view->windowToContents(m_lastKnownMousePosition)); |
| renderView->hitTest(request, result); |
| |
| OptionalCursor optionalCursor = selectCursor(result); |
| if (optionalCursor.isCursorChange()) { |
| m_currentMouseCursor = optionalCursor.cursor(); |
| view->setCursor(m_currentMouseCursor); |
| } |
| } |
| |
| OptionalCursor EventHandler::selectCursor(const HitTestResult& result) |
| { |
| if (m_resizeScrollableArea && m_resizeScrollableArea->inResizeMode()) |
| return NoCursorChange; |
| |
| Page* page = m_frame->page(); |
| if (!page) |
| return NoCursorChange; |
| #if OS(WIN) |
| if (panScrollInProgress()) |
| return NoCursorChange; |
| #endif |
| |
| Node* node = result.innerPossiblyPseudoNode(); |
| if (!node) |
| return selectAutoCursor(result, node, iBeamCursor()); |
| |
| RenderObject* renderer = node->renderer(); |
| RenderStyle* style = renderer ? renderer->style() : 0; |
| |
| if (renderer) { |
| Cursor overrideCursor; |
| switch (renderer->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(); |
| // Get hotspot and convert from logical pixels to physical pixels. |
| IntPoint hotSpot = (*cursors)[i].hotSpot(); |
| hotSpot.scale(scale, scale); |
| IntSize size = cachedImage->imageForRenderer(renderer)->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->imageForRenderer(renderer); |
| // Ensure no overflow possible in calculations above. |
| if (scale < minimumCursorScale) |
| continue; |
| return Cursor(image, 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(); |
| } |
| |
| OptionalCursor EventHandler::selectAutoCursor(const HitTestResult& result, Node* node, const Cursor& iBeam) |
| { |
| bool editable = (node && node->rendererIsEditable()); |
| |
| if (useHandCursor(node, result.isOverLink())) |
| return handCursor(); |
| |
| bool inResizer = false; |
| RenderObject* renderer = node ? node->renderer() : 0; |
| if (renderer && m_frame->view()) { |
| RenderLayer* layer = renderer->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 || (renderer && renderer->isText() && node->canStartSelection())) && !inResizer && !result.scrollbar()) |
| return iBeam; |
| return pointerCursor(); |
| } |
| |
| static LayoutPoint documentPointForWindowPoint(LocalFrame* frame, const IntPoint& windowPoint) |
| { |
| 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->windowToContents(windowPoint) : windowPoint; |
| } |
| |
| bool EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent) |
| { |
| TRACE_EVENT0("webkit", "EventHandler::handleMousePressEvent"); |
| |
| RefPtr<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->windowToContents(mouseEvent.position()); |
| else { |
| invalidateClick(); |
| return false; |
| } |
| m_mouseDownWasInSubframe = false; |
| |
| HitTestRequest::HitTestRequestType hitType = HitTestRequest::Active | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent; |
| if (mouseEvent.fromTouch()) |
| hitType |= HitTestRequest::ReadOnly; |
| HitTestRequest request(hitType); |
| // Save the document point we generate in case the window coordinate is invalidated by what happens |
| // when we dispatch the event. |
| LayoutPoint documentPoint = documentPointForWindowPoint(m_frame, mouseEvent.position()); |
| MouseEventWithHitTestResults mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent); |
| |
| if (!mev.targetNode()) { |
| invalidateClick(); |
| return false; |
| } |
| |
| m_mousePressNode = mev.targetNode(); |
| |
| RefPtr<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.targetNode(); |
| 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.targetNode()->isTextNode() ? NodeRenderingTraversal::parent(mev.targetNode()) : mev.targetNode(); |
| |
| if (FrameView* view = m_frame->view()) { |
| RenderLayer* layer = mev.targetNode()->renderer() ? mev.targetNode()->renderer()->enclosingLayer() : 0; |
| IntPoint p = view->windowToContents(mouseEvent.position()); |
| if (layer && layer->scrollableArea() && layer->scrollableArea()->isPointInResizeControl(p, ResizerForPointer)) { |
| m_resizeScrollableArea = layer->scrollableArea(); |
| m_resizeScrollableArea->setInResizeMode(true); |
| m_offsetFromResizeCorner = m_resizeScrollableArea->offsetFromResizeCorner(p); |
| invalidateClick(); |
| return true; |
| } |
| } |
| |
| m_frame->selection().setCaretBlinkingSuspended(true); |
| |
| bool swallowEvent = !dispatchMouseEvent(EventTypeNames::mousedown, mev.targetNode(), m_clickCount, mouseEvent, true); |
| swallowEvent = swallowEvent || !handleMouseFocus(mouseEvent); |
| 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 | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent); |
| 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 | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent); |
| mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent); |
| } |
| |
| if (passMousePressEventToScrollbar(mev)) |
| swallowEvent = true; |
| else |
| swallowEvent = handleMousePressEvent(mev); |
| } |
| |
| return swallowEvent; |
| } |
| |
| static RenderLayer* layerForNode(Node* node) |
| { |
| if (!node) |
| return 0; |
| |
| RenderObject* renderer = node->renderer(); |
| if (!renderer) |
| return 0; |
| |
| RenderLayer* layer = renderer->enclosingLayer(); |
| if (!layer) |
| return 0; |
| |
| return layer; |
| } |
| |
| ScrollableArea* EventHandler::associatedScrollableArea(const RenderLayer* layer) const |
| { |
| if (RenderLayerScrollableArea* scrollableArea = layer->scrollableArea()) { |
| if (scrollableArea->scrollsOverflow()) |
| return scrollableArea; |
| } |
| |
| return 0; |
| } |
| |
| bool EventHandler::handleMouseMoveEvent(const PlatformMouseEvent& event) |
| { |
| TRACE_EVENT0("webkit", "EventHandler::handleMouseMoveEvent"); |
| |
| RefPtr<FrameView> protector(m_frame->view()); |
| MaximumDurationTracker maxDurationTracker(&m_maxMouseMovedDuration); |
| |
| HitTestResult hoveredNode = HitTestResult(LayoutPoint()); |
| bool result = handleMouseMoveOrLeaveEvent(event, &hoveredNode); |
| |
| Page* page = m_frame->page(); |
| if (!page) |
| return result; |
| |
| if (RenderLayer* layer = layerForNode(hoveredNode.innerNode())) { |
| if (ScrollableArea* layerScrollableArea = associatedScrollableArea(layer)) |
| layerScrollableArea->mouseMovedInContentArea(); |
| } |
| |
| if (FrameView* frameView = m_frame->view()) |
| frameView->mouseMovedInContentArea(); |
| |
| hoveredNode.setToShadowHostIfInUserAgentShadowRoot(); |
| page->chrome().mouseDidMoveOverElement(hoveredNode, event.modifierFlags()); |
| page->chrome().setToolTip(hoveredNode); |
| |
| return result; |
| } |
| |
| void EventHandler::handleMouseLeaveEvent(const PlatformMouseEvent& event) |
| { |
| TRACE_EVENT0("webkit", "EventHandler::handleMouseLeaveEvent"); |
| |
| RefPtr<FrameView> protector(m_frame->view()); |
| handleMouseMoveOrLeaveEvent(event); |
| } |
| |
| bool EventHandler::handleMouseMoveOrLeaveEvent(const PlatformMouseEvent& mouseEvent, HitTestResult* hoveredNode, bool onlyUpdateScrollbars) |
| { |
| 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()->windowToContents(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; |
| } |
| |
| HitTestRequest::HitTestRequestType hitType = HitTestRequest::Move | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent; |
| if (mouseEvent.fromTouch()) |
| hitType |= HitTestRequest::ReadOnly; |
| |
| 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 = prepareMouseEvent(request, mouseEvent); |
| if (hoveredNode) |
| *hoveredNode = mev.hitTestResult(); |
| |
| Scrollbar* scrollbar = 0; |
| |
| if (m_resizeScrollableArea && m_resizeScrollableArea->inResizeMode()) |
| m_resizeScrollableArea->resize(mouseEvent, m_offsetFromResizeCorner); |
| else { |
| if (FrameView* view = m_frame->view()) |
| scrollbar = view->scrollbarAtPoint(mouseEvent.position()); |
| |
| if (!scrollbar) |
| scrollbar = mev.scrollbar(); |
| |
| updateLastScrollbarUnderMouse(scrollbar, !m_mousePressed); |
| if (onlyUpdateScrollbars) |
| return true; |
| } |
| |
| bool swallowEvent = false; |
| RefPtr<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) |
| passMouseMoveEventToSubframe(mev, m_lastMouseMoveEventSubframe.get()); |
| |
| if (newSubframe) { |
| // Update over/out state before passing the event to the subframe. |
| updateMouseEventTargetNode(mev.targetNode(), 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()) { |
| m_currentMouseCursor = optionalCursor.cursor(); |
| view->setCursor(m_currentMouseCursor); |
| } |
| } |
| } |
| |
| m_lastMouseMoveEventSubframe = newSubframe; |
| |
| if (swallowEvent) |
| return true; |
| |
| swallowEvent = !dispatchMouseEvent(EventTypeNames::mousemove, mev.targetNode(), 0, mouseEvent, true); |
| if (!swallowEvent) |
| swallowEvent = handleMouseDraggedEvent(mev); |
| |
| return swallowEvent; |
| } |
| |
| void EventHandler::invalidateClick() |
| { |
| m_clickCount = 0; |
| m_clickNode = nullptr; |
| } |
| |
| static Node* parentForClickEvent(const Node& node) |
| { |
| // IE doesn't dispatch click events for mousedown/mouseup events across form |
| // controls. |
| if (node.isHTMLElement() && toHTMLElement(node).isInteractiveContent()) |
| return 0; |
| return NodeRenderingTraversal::parent(&node); |
| } |
| |
| bool EventHandler::handleMouseReleaseEvent(const PlatformMouseEvent& mouseEvent) |
| { |
| TRACE_EVENT0("webkit", "EventHandler::handleMouseReleaseEvent"); |
| |
| RefPtr<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()->windowToContents(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_lastNodeUnderMouse.get(), m_clickCount, mouseEvent, setUnder); |
| } |
| |
| HitTestRequest::HitTestRequestType hitType = HitTestRequest::Release | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent; |
| if (mouseEvent.fromTouch()) |
| hitType |= HitTestRequest::ReadOnly; |
| 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.targetNode(), 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.targetNode() && m_clickNode) { |
| if (Node* clickTargetNode = mev.targetNode()->commonAncestor(*m_clickNode, parentForClickEvent)) |
| swallowClickEvent = !dispatchMouseEvent(EventTypeNames::click, clickTargetNode, m_clickCount, mouseEvent, true); |
| } |
| |
| if (m_resizeScrollableArea) { |
| m_resizeScrollableArea->setInResizeMode(false); |
| m_resizeScrollableArea = 0; |
| } |
| |
| 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, Clipboard* clipboard) |
| { |
| 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, nullptr, clipboard); |
| |
| 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, Clipboard* clipboard) |
| { |
| 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; |
| |
| dropZoneStr = dropZoneStr.lower(); |
| |
| SpaceSplitString keywords(dropZoneStr, false); |
| 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 || clipboard->hasDropZoneType(keywords[i].string()); |
| |
| if (matched && dragOperation != DragOperationNone) |
| break; |
| } |
| if (matched) { |
| clipboard->setDropEffect(convertDragOperationToDropZoneOperation(dragOperation)); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| bool EventHandler::updateDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard) |
| { |
| bool accept = false; |
| |
| if (!m_frame->view()) |
| return false; |
| |
| HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent); |
| MouseEventWithHitTestResults mev = prepareMouseEvent(request, event); |
| |
| // Drag events should never go to text nodes (following IE, and proper mouseover/out dispatch) |
| RefPtrWillBeRawPtr<Node> newTarget = mev.targetNode(); |
| if (newTarget && newTarget->isTextNode()) |
| newTarget = NodeRenderingTraversal::parent(newTarget.get()); |
| |
| 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, clipboard); |
| } 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, clipboard); |
| if (!accept) |
| accept = findDropZone(newTarget.get(), clipboard); |
| } |
| |
| if (targetIsFrame(m_dragTarget.get(), targetFrame)) { |
| if (targetFrame) |
| accept = targetFrame->eventHandler().updateDragAndDrop(event, clipboard); |
| } else if (m_dragTarget) |
| dispatchDragEvent(EventTypeNames::dragleave, m_dragTarget.get(), event, clipboard); |
| |
| 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, clipboard); |
| } 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, clipboard); |
| if (!accept) |
| accept = findDropZone(newTarget.get(), clipboard); |
| m_shouldOnlyFireDragOverEvent = false; |
| } |
| } |
| m_dragTarget = newTarget; |
| |
| return accept; |
| } |
| |
| void EventHandler::cancelDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard) |
| { |
| LocalFrame* targetFrame; |
| if (targetIsFrame(m_dragTarget.get(), targetFrame)) { |
| if (targetFrame) |
| targetFrame->eventHandler().cancelDragAndDrop(event, clipboard); |
| } else if (m_dragTarget.get()) { |
| if (dragState().m_dragSrc) |
| dispatchDragSrcEvent(EventTypeNames::drag, event); |
| dispatchDragEvent(EventTypeNames::dragleave, m_dragTarget.get(), event, clipboard); |
| } |
| clearDragState(); |
| } |
| |
| bool EventHandler::performDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard) |
| { |
| LocalFrame* targetFrame; |
| bool preventedDefault = false; |
| if (targetIsFrame(m_dragTarget.get(), targetFrame)) { |
| if (targetFrame) |
| preventedDefault = targetFrame->eventHandler().performDragAndDrop(event, clipboard); |
| } else if (m_dragTarget.get()) |
| preventedDefault = dispatchDragEvent(EventTypeNames::drop, m_dragTarget.get(), event, clipboard); |
| 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, documentPointForWindowPoint(m_frame, mev.position()), mev); |
| } |
| |
| void EventHandler::updateMouseEventTargetNode(Node* targetNode, const PlatformMouseEvent& mouseEvent, bool fireMouseOverOut) |
| { |
| 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 = NodeRenderingTraversal::parent(result); |
| } |
| m_nodeUnderMouse = result; |
| |
| // Fire mouseout/mouseover if the mouse has shifted to a different node. |
| if (fireMouseOverOut) { |
| RenderLayer* layerForLastNode = layerForNode(m_lastNodeUnderMouse.get()); |
| RenderLayer* 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) { |
| // send mouseout event to the old node |
| if (m_lastNodeUnderMouse) |
| m_lastNodeUnderMouse->dispatchMouseEvent(mouseEvent, EventTypeNames::mouseout, 0, m_nodeUnderMouse.get()); |
| // send mouseover event to the new node |
| if (m_nodeUnderMouse) |
| m_nodeUnderMouse->dispatchMouseEvent(mouseEvent, EventTypeNames::mouseover, 0, m_lastNodeUnderMouse.get()); |
| } |
| m_lastNodeUnderMouse = m_nodeUnderMouse; |
| } |
| } |
| |
| // The return value means 'continue default handling.' |
| 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 'continue default handling.' |
| bool EventHandler::handleMouseFocus(const PlatformMouseEvent& mouseEvent) |
| { |
| // If clicking on a frame scrollbar, do not mess up with content focus. |
| if (FrameView* view = m_frame->view()) { |
| if (view->scrollbarAtPoint(mouseEvent.position())) |
| return true; |
| } |
| |
| // The layout needs to be up to date to determine if an element is focusable. |
| m_frame->document()->updateLayoutIgnorePendingStylesheets(); |
| |
| Element* element = 0; |
| if (m_nodeUnderMouse) |
| element = m_nodeUnderMouse->isElementNode() ? toElement(m_nodeUnderMouse) : m_nodeUnderMouse->parentOrShadowHostElement(); |
| for (; element; element = element->parentOrShadowHostElement()) { |
| if (element->isFocusable() && element->focused()) |
| return true; |
| 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 true; |
| |
| // Only change the focus when clicking scrollbars if it can transfered to a |
| // mouse focusable node. |
| if (!element && isInsideScrollbar(mouseEvent.position())) |
| return false; |
| |
| 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, FocusTypeMouse)) |
| return false; |
| } 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 false; |
| } |
| } |
| |
| return true; |
| } |
| |
| bool EventHandler::isInsideScrollbar(const IntPoint& windowPoint) const |
| { |
| if (RenderView* renderView = m_frame->contentRenderer()) { |
| HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent); |
| HitTestResult result(windowPoint); |
| renderView->hitTest(request, result); |
| return result.scrollbar(); |
| } |
| |
| return false; |
| } |
| |
| bool EventHandler::handleWheelEvent(const PlatformWheelEvent& event) |
| { |
| #define RETURN_WHEEL_EVENT_HANDLED() \ |
| { \ |
| setFrameWasScrolledByUser(); \ |
| return true; \ |
| } |
| |
| Document* doc = m_frame->document(); |
| |
| if (!doc->renderView()) |
| return false; |
| |
| RefPtr<FrameView> protector(m_frame->view()); |
| |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return false; |
| |
| LayoutPoint vPoint = view->windowToContents(event.position()); |
| |
| HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent); |
| HitTestResult result(vPoint); |
| doc->renderView()->hitTest(request, result); |
| |
| Node* node = result.innerNode(); |
| // Wheel events should not dispatch to text nodes. |
| if (node && node->isTextNode()) |
| node = NodeRenderingTraversal::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. |
| RenderObject* target = node->renderer(); |
| |
| if (isOverWidget && target && target->isWidget()) { |
| Widget* widget = toRenderWidget(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 || !view->wheelEvent(event)) |
| return false; |
| |
| RETURN_WHEEL_EVENT_HANDLED(); |
| |
| #undef RETURN_WHEEL_EVENT_HANDLED |
| } |
| |
| void EventHandler::defaultWheelEventHandler(Node* startNode, WheelEvent* wheelEvent) |
| { |
| if (!startNode || !wheelEvent) |
| return; |
| |
| // Ctrl + scrollwheel is reserved for triggering zoom in/out actions in Chromium. |
| if (wheelEvent->ctrlKey()) |
| return; |
| |
| Node* stopNode = m_previousWheelScrolledNode.get(); |
| ScrollGranularity granularity = wheelGranularityToScrollGranularity(wheelEvent->deltaMode()); |
| |
| // 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). |
| if (scroll(ScrollRight, granularity, startNode, &stopNode, wheelEvent->deltaX(), roundedIntPoint(wheelEvent->absoluteLocation()))) |
| wheelEvent->setDefaultHandled(); |
| |
| if (scroll(ScrollDown, granularity, startNode, &stopNode, wheelEvent->deltaY(), roundedIntPoint(wheelEvent->absoluteLocation()))) |
| 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 (FrameView::ScrollableAreaSet::const_iterator it = areas->begin(); it != areas->end(); ++it) { |
| ScrollableArea* sa = *it; |
| ScrollAnimator* animator = sa->scrollAnimator(); |
| if (animator) |
| animator->cancelAnimations(); |
| } |
| return false; |
| } |
| |
| bool EventHandler::handleGestureEvent(const PlatformGestureEvent& gestureEvent) |
| { |
| IntPoint adjustedPoint = gestureEvent.position(); |
| RefPtr<LocalFrame> subframe = nullptr; |
| switch (gestureEvent.type()) { |
| case PlatformEvent::GestureScrollBegin: |
| case PlatformEvent::GestureScrollUpdate: |
| case PlatformEvent::GestureScrollUpdateWithoutPropagation: |
| case PlatformEvent::GestureScrollEnd: |
| case PlatformEvent::GestureFlingStart: |
| // Handle directly in main frame |
| break; |
| |
| case PlatformEvent::GestureTap: |
| case PlatformEvent::GestureTapUnconfirmed: |
| case PlatformEvent::GestureTapDown: |
| case PlatformEvent::GestureShowPress: |
| case PlatformEvent::GestureTapDownCancel: |
| case PlatformEvent::GestureTwoFingerTap: |
| case PlatformEvent::GestureLongPress: |
| case PlatformEvent::GestureLongTap: |
| case PlatformEvent::GesturePinchBegin: |
| case PlatformEvent::GesturePinchEnd: |
| case PlatformEvent::GesturePinchUpdate: |
| adjustGesturePosition(gestureEvent, adjustedPoint); |
| subframe = getSubFrameForGestureEvent(adjustedPoint, gestureEvent); |
| if (subframe) |
| return subframe->eventHandler().handleGestureEvent(gestureEvent); |
| break; |
| |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| |
| RefPtrWillBeRawPtr<Node> eventTarget = nullptr; |
| RefPtr<Scrollbar> scrollbar; |
| if (gestureEvent.type() == PlatformEvent::GestureScrollEnd |
| || gestureEvent.type() == PlatformEvent::GestureScrollUpdate |
| || gestureEvent.type() == PlatformEvent::GestureScrollUpdateWithoutPropagation |
| || gestureEvent.type() == PlatformEvent::GestureFlingStart) { |
| scrollbar = m_scrollbarHandlingScrollGesture.get(); |
| eventTarget = m_scrollGestureHandlingNode.get(); |
| } |
| |
| HitTestRequest::HitTestRequestType hitType = HitTestRequest::TouchEvent; |
| double activeInterval = 0; |
| bool shouldKeepActiveForMinInterval = false; |
| if (gestureEvent.type() == PlatformEvent::GestureShowPress |
| || gestureEvent.type() == PlatformEvent::GestureTapUnconfirmed) { |
| hitType |= HitTestRequest::Active; |
| } else if (gestureEvent.type() == PlatformEvent::GestureTapDownCancel) { |
| hitType |= HitTestRequest::Release; |
| // A TapDownCancel received when no element is active shouldn't really be changing hover state. |
| if (!m_frame->document()->activeHoverElement()) |
| hitType |= HitTestRequest::ReadOnly; |
| } else if (gestureEvent.type() == PlatformEvent::GestureTap) { |
| hitType |= HitTestRequest::Release; |
| // 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; |
| } |
| else |
| hitType |= HitTestRequest::Active | HitTestRequest::ReadOnly; |
| |
| if ((!scrollbar && !eventTarget) || !(hitType & HitTestRequest::ReadOnly)) { |
| IntPoint hitTestPoint = m_frame->view()->windowToContents(adjustedPoint); |
| HitTestResult result = hitTestResultAtPoint(hitTestPoint, hitType | HitTestRequest::AllowFrameScrollbars); |
| |
| if (shouldKeepActiveForMinInterval) { |
| m_lastDeferredTapElement = result.innerElement(); |
| m_activeIntervalTimer.startOneShot(minimumActiveInterval - activeInterval, FROM_HERE); |
| } |
| |
| eventTarget = result.targetNode(); |
| if (!scrollbar) { |
| FrameView* view = m_frame->view(); |
| scrollbar = view ? view->scrollbarAtPoint(gestureEvent.position()) : 0; |
| } |
| if (!scrollbar) |
| scrollbar = result.scrollbar(); |
| } |
| |
| if (scrollbar) { |
| bool eventSwallowed = scrollbar->gestureEvent(gestureEvent); |
| if (gestureEvent.type() == PlatformEvent::GestureTapDown && eventSwallowed) { |
| m_scrollbarHandlingScrollGesture = scrollbar; |
| } else if (gestureEvent.type() == PlatformEvent::GestureScrollEnd |
| || gestureEvent.type() == PlatformEvent::GestureFlingStart |
| || !eventSwallowed) { |
| m_scrollbarHandlingScrollGesture = nullptr; |
| } |
| |
| if (eventSwallowed) |
| return true; |
| } |
| |
| if (eventTarget) { |
| bool eventSwallowed = false; |
| if (handleScrollGestureOnResizer(eventTarget.get(), gestureEvent)) |
| eventSwallowed = true; |
| else |
| eventSwallowed = eventTarget->dispatchGestureEvent(gestureEvent); |
| if (gestureEvent.type() == PlatformEvent::GestureScrollBegin || gestureEvent.type() == PlatformEvent::GestureScrollEnd) { |
| if (eventSwallowed) |
| m_scrollGestureHandlingNode = eventTarget; |
| } |
| |
| if (eventSwallowed) |
| return true; |
| } |
| |
| // FIXME: A more general scroll system (https://bugs.webkit.org/show_bug.cgi?id=80596) will |
| // eliminate the need for this. |
| TemporaryChange<PlatformEvent::Type> baseEventType(m_baseEventType, gestureEvent.type()); |
| |
| switch (gestureEvent.type()) { |
| case PlatformEvent::GestureScrollBegin: |
| return handleGestureScrollBegin(gestureEvent); |
| case PlatformEvent::GestureScrollUpdate: |
| case PlatformEvent::GestureScrollUpdateWithoutPropagation: |
| return handleGestureScrollUpdate(gestureEvent); |
| case PlatformEvent::GestureScrollEnd: |
| return handleGestureScrollEnd(gestureEvent); |
| case PlatformEvent::GestureTap: |
| return handleGestureTap(gestureEvent, adjustedPoint); |
| case PlatformEvent::GestureShowPress: |
| return handleGestureShowPress(); |
| case PlatformEvent::GestureLongPress: |
| return handleGestureLongPress(gestureEvent, adjustedPoint); |
| case PlatformEvent::GestureLongTap: |
| return handleGestureLongTap(gestureEvent, adjustedPoint); |
| case PlatformEvent::GestureTwoFingerTap: |
| return handleGestureTwoFingerTap(gestureEvent, adjustedPoint); |
| case PlatformEvent::GestureTapDown: |
| case PlatformEvent::GesturePinchBegin: |
| case PlatformEvent::GesturePinchEnd: |
| case PlatformEvent::GesturePinchUpdate: |
| case PlatformEvent::GestureTapDownCancel: |
| case PlatformEvent::GestureTapUnconfirmed: |
| case PlatformEvent::GestureFlingStart: |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| |
| return false; |
| } |
| |
| bool EventHandler::handleGestureTap(const PlatformGestureEvent& gestureEvent, const IntPoint& adjustedPoint) |
| { |
| // FIXME: Refactor this code to not hit test multiple times. We use the adjusted position to ensure that the correct node is targeted by the later redundant hit tests. |
| |
| unsigned modifierFlags = 0; |
| if (gestureEvent.altKey()) |
| modifierFlags |= PlatformEvent::AltKey; |
| if (gestureEvent.ctrlKey()) |
| modifierFlags |= PlatformEvent::CtrlKey; |
| if (gestureEvent.metaKey()) |
| modifierFlags |= PlatformEvent::MetaKey; |
| if (gestureEvent.shiftKey()) |
| modifierFlags |= PlatformEvent::ShiftKey; |
| PlatformEvent::Modifiers modifiers = static_cast<PlatformEvent::Modifiers>(modifierFlags); |
| |
| PlatformMouseEvent fakeMouseMove(adjustedPoint, gestureEvent.globalPosition(), |
| NoButton, PlatformEvent::MouseMoved, /* clickCount */ 0, |
| modifiers, PlatformMouseEvent::FromTouch, gestureEvent.timestamp()); |
| handleMouseMoveEvent(fakeMouseMove); |
| |
| bool defaultPrevented = false; |
| PlatformMouseEvent fakeMouseDown(adjustedPoint, gestureEvent.globalPosition(), |
| LeftButton, PlatformEvent::MousePressed, gestureEvent.tapCount(), |
| modifiers, PlatformMouseEvent::FromTouch, gestureEvent.timestamp()); |
| defaultPrevented |= handleMousePressEvent(fakeMouseDown); |
| |
| PlatformMouseEvent fakeMouseUp(adjustedPoint, gestureEvent.globalPosition(), |
| LeftButton, PlatformEvent::MouseReleased, gestureEvent.tapCount(), |
| modifiers, PlatformMouseEvent::FromTouch, gestureEvent.timestamp()); |
| defaultPrevented |= handleMouseReleaseEvent(fakeMouseUp); |
| |
| return defaultPrevented; |
| } |
| |
| bool EventHandler::handleGestureLongPress(const PlatformGestureEvent& gestureEvent, const IntPoint& adjustedPoint) |
| { |
| m_longTapShouldInvokeContextMenu = false; |
| if (m_frame->settings() && m_frame->settings()->touchDragDropEnabled() && m_frame->view()) { |
| PlatformMouseEvent mouseDownEvent(adjustedPoint, gestureEvent.globalPosition(), LeftButton, PlatformEvent::MousePressed, 1, |
| gestureEvent.shiftKey(), gestureEvent.ctrlKey(), gestureEvent.altKey(), gestureEvent.metaKey(), WTF::currentTime()); |
| m_mouseDown = mouseDownEvent; |
| |
| PlatformMouseEvent mouseDragEvent(adjustedPoint, gestureEvent.globalPosition(), LeftButton, PlatformEvent::MouseMoved, 1, |
| gestureEvent.shiftKey(), gestureEvent.ctrlKey(), gestureEvent.altKey(), gestureEvent.metaKey(), WTF::currentTime()); |
| HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent); |
| MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseDragEvent); |
| m_didStartDrag = false; |
| m_mouseDownMayStartDrag = true; |
| dragState().m_dragSrc = nullptr; |
| m_mouseDownPos = m_frame->view()->windowToContents(mouseDragEvent.position()); |
| RefPtr<FrameView> protector(m_frame->view()); |
| handleDrag(mev, DontCheckDragHysteresis); |
| if (m_didStartDrag) { |
| 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()->windowToContents(gestureEvent.position()); |
| HitTestResult result = hitTestResultAtPoint(hitTestPoint); |
| Node* innerNode = result.targetNode(); |
| if (!result.isLiveLink() && innerNode && (innerNode->isContentEditable() || innerNode->isTextNode())) { |
| selectClosestWordFromHitTestResult(result, DontAppendTrailingWhitespace); |
| if (m_frame->selection().isRange()) { |
| focusDocumentView(); |
| return true; |
| } |
| } |
| } |
| return sendContextMenuEventForGesture(gestureEvent); |
| } |
| |
| bool EventHandler::handleGestureLongTap(const PlatformGestureEvent& gestureEvent, const IntPoint& adjustedPoint) |
| { |
| #if !OS(ANDROID) |
| if (m_longTapShouldInvokeContextMenu) { |
| m_longTapShouldInvokeContextMenu = false; |
| return sendContextMenuEventForGesture(gestureEvent); |
| } |
| #endif |
| return false; |
| } |
| |
| bool EventHandler::handleScrollGestureOnResizer(Node* eventTarget, const PlatformGestureEvent& gestureEvent) { |
| if (gestureEvent.type() == PlatformEvent::GestureScrollBegin) { |
| RenderLayer* layer = eventTarget->renderer() ? eventTarget->renderer()->enclosingLayer() : 0; |
| IntPoint p = m_frame->view()->windowToContents(gestureEvent.position()); |
| if (layer && layer->scrollableArea() && layer->scrollableArea()->isPointInResizeControl(p, ResizerForTouch)) { |
| m_resizeScrollableArea = layer->scrollableArea(); |
| m_resizeScrollableArea->setInResizeMode(true); |
| m_offsetFromResizeCorner = m_resizeScrollableArea->offsetFromResizeCorner(p); |
| return true; |
| } |
| } else if (gestureEvent.type() == PlatformEvent::GestureScrollUpdate || |
| gestureEvent.type() == PlatformEvent::GestureScrollUpdateWithoutPropagation) { |
| 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 = 0; |
| return false; |
| } |
| } |
| |
| return false; |
| } |
| |
| bool EventHandler::handleGestureTwoFingerTap(const PlatformGestureEvent& gestureEvent, const IntPoint& adjustedPoint) |
| { |
| return sendContextMenuEventForGesture(gestureEvent); |
| } |
| |
| bool EventHandler::passGestureEventToWidget(const PlatformGestureEvent& gestureEvent, Widget* widget) |
| { |
| if (!widget) |
| return false; |
| |
| if (!widget->isFrameView()) |
| return false; |
| |
| return toFrameView(widget)->frame().eventHandler().handleGestureEvent(gestureEvent); |
| } |
| |
| bool EventHandler::passGestureEventToWidgetIfPossible(const PlatformGestureEvent& gestureEvent, RenderObject* renderer) |
| { |
| if (m_lastHitTestResultOverWidget && renderer && renderer->isWidget()) { |
| Widget* widget = toRenderWidget(renderer)->widget(); |
| return widget && passGestureEventToWidget(gestureEvent, widget); |
| } |
| return false; |
| } |
| |
| bool EventHandler::handleGestureScrollEnd(const PlatformGestureEvent& gestureEvent) { |
| RefPtrWillBeRawPtr<Node> node = m_scrollGestureHandlingNode; |
| clearGestureScrollNodes(); |
| |
| if (node) |
| passGestureEventToWidgetIfPossible(gestureEvent, node->renderer()); |
| |
| return false; |
| } |
| |
| bool EventHandler::handleGestureScrollBegin(const PlatformGestureEvent& gestureEvent) |
| { |
| Document* document = m_frame->document(); |
| if (!document->renderView()) |
| return false; |
| |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return false; |
| |
| LayoutPoint viewPoint = view->windowToContents(gestureEvent.position()); |
| HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent); |
| HitTestResult result(viewPoint); |
| document->renderView()->hitTest(request, result); |
| |
| m_lastHitTestResultOverWidget = result.isOverWidget(); |
| m_scrollGestureHandlingNode = result.innerNode(); |
| m_previousGestureScrolledNode = nullptr; |
| |
| // If there's no renderer on the node, send the event to the nearest ancestor with a renderer. |
| // Needed for <option> and <optgroup> elements so we can touch scroll <select>s |
| while (m_scrollGestureHandlingNode && !m_scrollGestureHandlingNode->renderer()) |
| m_scrollGestureHandlingNode = m_scrollGestureHandlingNode->parentOrShadowHostNode(); |
| |
| if (!m_scrollGestureHandlingNode) |
| return false; |
| |
| passGestureEventToWidgetIfPossible(gestureEvent, m_scrollGestureHandlingNode->renderer()); |
| |
| return true; |
| } |
| |
| bool EventHandler::handleGestureScrollUpdate(const PlatformGestureEvent& gestureEvent) |
| { |
| FloatSize delta(gestureEvent.deltaX(), gestureEvent.deltaY()); |
| if (delta.isZero()) |
| return false; |
| |
| const float scaleFactor = m_frame->pageZoomFactor(); |
| delta.scale(1 / scaleFactor, 1 / scaleFactor); |
| |
| Node* node = m_scrollGestureHandlingNode.get(); |
| if (!node) |
| return sendScrollEventToView(gestureEvent, delta); |
| |
| // Ignore this event if the targeted node does not have a valid renderer. |
| RenderObject* renderer = node->renderer(); |
| if (!renderer) |
| return false; |
| |
| RefPtr<FrameView> protector(m_frame->view()); |
| |
| Node* stopNode = 0; |
| bool scrollShouldNotPropagate = gestureEvent.type() == PlatformEvent::GestureScrollUpdateWithoutPropagation; |
| |
| // Try to send the event to the correct view. |
| if (passGestureEventToWidgetIfPossible(gestureEvent, renderer)) { |
| if(scrollShouldNotPropagate) |
| m_previousGestureScrolledNode = m_scrollGestureHandlingNode; |
| |
| return true; |
| } |
| |
| if (scrollShouldNotPropagate) |
| stopNode = m_previousGestureScrolledNode.get(); |
| |
| // First try to scroll the closest scrollable RenderBox ancestor of |node|. |
| ScrollGranularity granularity = ScrollByPixel; |
| bool horizontalScroll = scroll(ScrollLeft, granularity, node, &stopNode, delta.width()); |
| bool verticalScroll = scroll(ScrollUp, granularity, node, &stopNode, delta.height()); |
| |
| if (scrollShouldNotPropagate) |
| m_previousGestureScrolledNode = stopNode; |
| |
| if (horizontalScroll || verticalScroll) { |
| setFrameWasScrolledByUser(); |
| return true; |
| } |
| |
| // Otherwise try to scroll the view. |
| return sendScrollEventToView(gestureEvent, delta); |
| } |
| |
| bool EventHandler::sendScrollEventToView(const PlatformGestureEvent& gestureEvent, const FloatSize& scaledDelta) |
| { |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return false; |
| |
| const float tickDivisor = static_cast<float>(WheelEvent::TickMultiplier); |
| IntPoint point(gestureEvent.position().x(), gestureEvent.position().y()); |
| IntPoint globalPoint(gestureEvent.globalPosition().x(), gestureEvent.globalPosition().y()); |
| PlatformWheelEvent syntheticWheelEvent(point, globalPoint, |
| scaledDelta.width(), scaledDelta.height(), |
| scaledDelta.width() / tickDivisor, scaledDelta.height() / tickDivisor, |
| ScrollByPixelWheelEvent, |
| gestureEvent.shiftKey(), gestureEvent.ctrlKey(), gestureEvent.altKey(), gestureEvent.metaKey()); |
| syntheticWheelEvent.setHasPreciseScrollingDeltas(true); |
| |
| bool scrolledFrame = view->wheelEvent(syntheticWheelEvent); |
| if (scrolledFrame) |
| setFrameWasScrolledByUser(); |
| |
| return scrolledFrame; |
| } |
| |
| LocalFrame* EventHandler::getSubFrameForGestureEvent(const IntPoint& touchAdjustedPoint, const PlatformGestureEvent& gestureEvent) |
| { |
| PlatformMouseEvent mouseDown(touchAdjustedPoint, gestureEvent.globalPosition(), LeftButton, PlatformEvent::MousePressed, 1, |
| gestureEvent.shiftKey(), gestureEvent.ctrlKey(), gestureEvent.altKey(), gestureEvent.metaKey(), gestureEvent.timestamp()); |
| HitTestRequest request(HitTestRequest::ReadOnly); |
| MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseDown); |
| return subframeForHitTestResult(mev); |
| } |
| |
| void EventHandler::clearGestureScrollNodes() |
| { |
| m_scrollGestureHandlingNode = nullptr; |
| m_previousGestureScrolledNode = nullptr; |
| } |
| |
| 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::bestClickableNodeForTouchPoint(const IntPoint& touchCenter, const IntSize& touchRadius, IntPoint& targetPoint, Node*& targetNode) |
| { |
| IntPoint hitTestPoint = m_frame->view()->windowToContents(touchCenter); |
| HitTestResult result = hitTestResultAtPoint(hitTestPoint, HitTestRequest::ReadOnly | HitTestRequest::Active, touchRadius); |
| |
| // 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()) |
| return false; |
| |
| IntRect touchRect(touchCenter - touchRadius, touchRadius + touchRadius); |
| WillBeHeapVector<RefPtrWillBeMember<Node>, 11> nodes; |
| copyToVector(result.rectBasedTestResult(), nodes); |
| |
| // FIXME: Should be able to handle targetNode being a shadow DOM node to avoid performing uncessary hit tests |
| // in the case where further processing on the node is required. Returning the shadow ancestor prevents a |
| // regression in touchadjustment/html-label.html. Some refinement is required to testing/internals to |
| // handle targetNode being a shadow DOM node. |
| |
| // FIXME: the explicit Vector conversion copies into a temporary and is wasteful. |
| // FIXME: targetNode and success are only used by Internals functions. We should |
| // instead have dedicated test methods so we only do this work in tests. |
| bool success = findBestClickableCandidate(targetNode, targetPoint, touchCenter, touchRect, WillBeHeapVector<RefPtrWillBeMember<Node> > (nodes)); |
| if (success && targetNode) |
| targetNode = targetNode->deprecatedShadowAncestorNode(); |
| return success; |
| } |
| |
| bool EventHandler::bestContextMenuNodeForTouchPoint(const IntPoint& touchCenter, const IntSize& touchRadius, IntPoint& targetPoint, Node*& targetNode) |
| { |
| IntPoint hitTestPoint = m_frame->view()->windowToContents(touchCenter); |
| HitTestResult result = hitTestResultAtPoint(hitTestPoint, HitTestRequest::ReadOnly | HitTestRequest::Active, touchRadius); |
| |
| IntRect touchRect(touchCenter - touchRadius, touchRadius + touchRadius); |
| WillBeHeapVector<RefPtrWillBeMember<Node>, 11> nodes; |
| copyToVector(result.rectBasedTestResult(), 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) |
| { |
| IntPoint hitTestPoint = m_frame->view()->windowToContents(touchCenter); |
| HitTestResult result = hitTestResultAtPoint(hitTestPoint, HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent, touchRadius); |
| |
| IntRect touchRect(touchCenter - touchRadius, touchRadius + touchRadius); |
| WillBeHeapVector<RefPtrWillBeMember<Node>, 11> nodes; |
| copyToVector(result.rectBasedTestResult(), nodes); |
| |
| // FIXME: the explicit Vector conversion copies into a temporary and is wasteful. |
| return findBestZoomableArea(targetNode, targetArea, touchCenter, touchRect, WillBeHeapVector<RefPtrWillBeMember<Node> >(nodes)); |
| } |
| |
| void EventHandler::adjustGesturePosition(const PlatformGestureEvent& gestureEvent, IntPoint& adjustedPoint) |
| { |
| if (!shouldApplyTouchAdjustment(gestureEvent)) |
| return; |
| |
| Node* targetNode = 0; |
| switch (gestureEvent.type()) { |
| case PlatformEvent::GestureTap: |
| case PlatformEvent::GestureTapUnconfirmed: |
| case PlatformEvent::GestureTapDown: |
| case PlatformEvent::GestureShowPress: |
| bestClickableNodeForTouchPoint(gestureEvent.position(), IntSize(gestureEvent.area().width() / 2, gestureEvent.area().height() / 2), adjustedPoint, targetNode); |
| break; |
| case PlatformEvent::GestureLongPress: |
| case PlatformEvent::GestureLongTap: |
| case PlatformEvent::GestureTwoFingerTap: |
| bestContextMenuNodeForTouchPoint(gestureEvent.position(), IntSize(gestureEvent.area().width() / 2, gestureEvent.area().height() / 2), adjustedPoint, targetNode); |
| break; |
| default: |
| // FIXME: Implement handling for other types as needed. |
| ASSERT_NOT_REACHED(); |
| } |
| } |
| |
| bool EventHandler::sendContextMenuEvent(const PlatformMouseEvent& event) |
| { |
| Document* doc = m_frame->document(); |
| 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 viewportPos = v->windowToContents(event.position()); |
| HitTestRequest request(HitTestRequest::Active | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent); |
| MouseEventWithHitTestResults mev = doc->prepareMouseEvent(request, viewportPos, event); |
| |
| if (!m_frame->selection().contains(viewportPos) |
| && !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.targetNode() && mev.targetNode()->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); |
| } |
| |
| return !dispatchMouseEvent(EventTypeNames::contextmenu, mev.targetNode(), 0, event, false); |
| } |
| |
| bool EventHandler::sendContextMenuEventForKey() |
| { |
| 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 location; |
| |
| Element* focusedElement = doc->focusedElement(); |
| FrameSelection& selection = m_frame->selection(); |
| Position start = selection.selection().start(); |
| bool shouldTranslateToRootView = true; |
| |
| if (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; |
| location = IntPoint(x, y); |
| } else if (focusedElement) { |
| IntRect clippedRect = focusedElement->boundsInRootViewSpace(); |
| location = IntPoint(clippedRect.center()); |
| } else { |
| location = IntPoint( |
| rightAligned ? view->contentsWidth() - kContextMenuMargin : kContextMenuMargin, |
| kContextMenuMargin); |
| shouldTranslateToRootView = false; |
| } |
| |
| m_frame->view()->setCursor(pointerCursor()); |
| |
| IntPoint position = shouldTranslateToRootView ? view->contentsToRootView(location) : location; |
| IntPoint globalPosition = view->hostWindow()->rootViewToScreen(IntRect(position, IntSize())).location(); |
| |
| Node* targetNode = doc->focusedElement(); |
| if (!targetNode) |
| targetNode = doc; |
| |
| // Use the focused node as the target for hover and active. |
| HitTestResult result(position); |
| result.setInnerNode(targetNode); |
| doc->updateHoverActiveState(HitTestRequest::Active | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent, result.innerElement()); |
| |
| // The contextmenu event is a mouse event even when invoked using the keyboard. |
| // This is required for web compatibility. |
| |
| #if OS(WIN) |
| PlatformEvent::Type eventType = PlatformEvent::MouseReleased; |
| #else |
| PlatformEvent::Type eventType = PlatformEvent::MousePressed; |
| #endif |
| |
| PlatformMouseEvent mouseEvent(position, globalPosition, RightButton, eventType, 1, false, false, false, false, WTF::currentTime()); |
| |
| handleMousePressEvent(mouseEvent); |
| return sendContextMenuEvent(mouseEvent); |
| } |
| |
| bool EventHandler::sendContextMenuEventForGesture(const PlatformGestureEvent& event) |
| { |
| #if OS(WIN) |
| PlatformEvent::Type eventType = PlatformEvent::MouseReleased; |
| #else |
| PlatformEvent::Type eventType = PlatformEvent::MousePressed; |
| #endif |
| |
| IntPoint adjustedPoint = event.position(); |
| adjustGesturePosition(event, adjustedPoint); |
| PlatformMouseEvent mouseEvent(adjustedPoint, event.globalPosition(), RightButton, eventType, 1, false, false, false, false, WTF::currentTime()); |
| // To simulate right-click behavior, we send a right mouse down and then |
| // context menu event. |
| 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() |
| { |
| if (!m_cursorUpdateTimer.isActive()) |
| m_cursorUpdateTimer.startOneShot(cursorUpdateInterval, FROM_HERE); |
| } |
| |
| 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->windowToContents(m_lastKnownMousePosition))) |
| return; |
| |
| dispatchFakeMouseMoveEventSoon(); |
| } |
| |
| void EventHandler::fakeMouseMoveEventTimerFired(Timer<EventHandler>* timer) |
| { |
| 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, 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 = 0; |
| } |
| |
| void EventHandler::hoverTimerFired(Timer<EventHandler>*) |
| { |
| m_hoverTimer.stop(); |
| |
| ASSERT(m_frame); |
| ASSERT(m_frame->document()); |
| |
| if (RenderView* renderer = m_frame->contentRenderer()) { |
| if (FrameView* view = m_frame->view()) { |
| HitTestRequest request(HitTestRequest::Move | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent); |
| HitTestResult result(view->windowToContents(m_lastKnownMousePosition)); |
| renderer->hitTest(request, result); |
| m_frame->document()->updateHoverActiveState(request, result.innerElement()); |
| } |
| } |
| } |
| |
| void EventHandler::activeIntervalTimerFired(Timer<EventHandler>*) |
| { |
| 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::isKeyEventAllowedInFullScreen(FullscreenElementStack* fullscreen, const PlatformKeyboardEvent& keyEvent) const |
| { |
| if (fullscreen->webkitFullScreenKeyboardInputAllowed()) |
| return true; |
| |
| if (keyEvent.type() == PlatformKeyboardEvent::Char) { |
| if (keyEvent.text().length() != 1) |
| return false; |
| UChar character = keyEvent.text()[0]; |
| return character == ' '; |
| } |
| |
| int keyCode = keyEvent.windowsVirtualKeyCode(); |
| return (keyCode >= VK_BACK && keyCode <= VK_CAPITAL) |
| || (keyCode >= VK_SPACE && keyCode <= VK_DELETE) |
| || (keyCode >= VK_OEM_1 && keyCode <= VK_OEM_PLUS) |
| || (keyCode >= VK_MULTIPLY && keyCode <= VK_OEM_8); |
| } |
| |
| bool EventHandler::keyEvent(const PlatformKeyboardEvent& initialKeyEvent) |
| { |
| RefPtr<FrameView> protector(m_frame->view()); |
| |
| ASSERT(m_frame->document()); |
| if (FullscreenElementStack* fullscreen = FullscreenElementStack::fromIfExists(*m_frame->document())) { |
| if (fullscreen->webkitIsFullScreen() && !isKeyEventAllowedInFullScreen(fullscreen, initialKeyEvent)) |
| return false; |
| } |
| |
| 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 FocusType 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)); |
| |
| FocusType retVal = FocusTypeNone; |
| |
| if (keyIdentifier == Down) |
| retVal = FocusTypeDown; |
| else if (keyIdentifier == Up) |
| retVal = FocusTypeUp; |
| else if (keyIdentifier == Left) |
| retVal = FocusTypeLeft; |
| else if (keyIdentifier == Right) |
| retVal = FocusTypeRight; |
| |
| return retVal; |
| } |
| |
| void EventHandler::defaultKeyboardEventHandler(KeyboardEvent* event) |
| { |
| if (event->type() == EventTypeNames::keydown) { |
| 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 { |
| FocusType type = focusDirectionForKey(AtomicString(event->keyIdentifier())); |
| if (type != FocusTypeNone) |
| 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 FloatPoint& floatDragViewportLocation) const |
| { |
| return dragHysteresisExceeded(flooredIntPoint(floatDragViewportLocation)); |
| } |
| |
| bool EventHandler::dragHysteresisExceeded(const IntPoint& dragViewportLocation) const |
| { |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return false; |
| IntPoint dragLocation = view->windowToContents(dragViewportLocation); |
| 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::freeClipboard() |
| { |
| if (dragState().m_dragClipboard) { |
| dragState().m_dragClipboard->clearDragImage(); |
| dragState().m_dragClipboard->setAccessPolicy(ClipboardNumb); |
| } |
| } |
| |
| void EventHandler::dragSourceEndedAt(const PlatformMouseEvent& event, DragOperation operation) |
| { |
| // Send a hit test request so that RenderLayer gets a chance to update the :hover and :active pseudoclasses. |
| HitTestRequest request(HitTestRequest::Release | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent); |
| prepareMouseEvent(request, event); |
| |
| if (dragState().m_dragSrc) { |
| dragState().m_dragClipboard->setDestinationOperation(operation); |
| // for now we don't care if event handler cancels default behavior, since there is none |
| dispatchDragSrcEvent(EventTypeNames::dragend, event); |
| } |
| freeClipboard(); |
| 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_dragClipboard.get()); |
| } |
| |
| bool EventHandler::handleDrag(const MouseEventWithHitTestResults& event, CheckDragHysteresis checkDragHysteresis) |
| { |
| 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 (event.event().button() != LeftButton || event.event().type() != PlatformEvent::MouseMoved) { |
| // If we allowed the other side of the bridge to handle a drag |
| // last time, then m_mousePressed might still be set. So we |
| // clear it now to make sure the next move after a drag |
| // doesn't look like a drag. |
| m_mousePressed = false; |
| return false; |
| } |
| |
| if (m_mouseDownMayStartDrag) { |
| HitTestRequest request(HitTestRequest::ReadOnly); |
| HitTestResult result(m_mouseDownPos); |
| m_frame->contentRenderer()->hitTest(request, 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 !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 (checkDragHysteresis == ShouldCheckDragHysteresis && !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. |
| freeClipboard(); |
| 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) |
| { |
| freeClipboard(); // would only happen if we missed a dragEnd. Do it anyway, just |
| // to make sure it gets numbified |
| dragState().m_dragClipboard = createDraggingClipboard(); |
| |
| // 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 (RenderObject* renderer = dragState().m_dragSrc->renderer()) { |
| FloatPoint absPos = renderer->localToAbsolute(FloatPoint(), UseTransforms); |
| IntSize delta = m_mouseDownPos - roundedIntPoint(absPos); |
| dragState().m_dragClipboard->setDragImageElement(dragState().m_dragSrc.get(), IntPoint(delta)); |
| } else { |
| // The renderer 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.populateDragClipboard(m_frame, dragState(), m_mouseDownPos)) |
| return false; |
| m_mouseDownMayStartDrag = dispatchDragSrcEvent(EventTypeNames::dragstart, m_mouseDown) |
| && !m_frame->selection().isInPasswordField(); |
| |
| // 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_dragClipboard->setAccessPolicy(ClipboardImageWritable); |
| |
| if (m_mouseDownMayStartDrag) { |
| // Dispatching the event could cause Page to go away. Make sure it's still valid before trying to use DragController. |
| m_didStartDrag = m_frame->page() && dragController.startDrag(m_frame, dragState(), event.event(), m_mouseDownPos); |
| // FIXME: This seems pretty useless now. The gesture code uses this as a signal for |
| // whether or not the drag started, but perhaps it can simply use the return value from |
| // handleDrag(), even though it doesn't mean exactly the same thing. |
| if (m_didStartDrag) |
| 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() || event->altGraphKey()) |
| return; |
| |
| ScrollDirection direction = event->shiftKey() ? ScrollBlockDirectionBackward : ScrollBlockDirectionForward; |
| if (scroll(direction, ScrollByPage)) { |
| event->setDefaultHandled(); |
| return; |
| } |
| |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return; |
| |
| if (view->scroll(direction, ScrollByPage)) |
| event->setDefaultHandled(); |
| } |
| |
| void EventHandler::defaultBackspaceEventHandler(KeyboardEvent* event) |
| { |
| ASSERT(event->type() == EventTypeNames::keydown); |
| |
| if (event->ctrlKey() || event->metaKey() || event->altKey() || event->altGraphKey()) |
| return; |
| |
| if (!m_frame->editor().behavior().shouldNavigateBackOnBackspace()) |
| return; |
| |
| Page* page = m_frame->page(); |
| if (!page || !page->mainFrame()->isLocalFrame()) |
| return; |
| bool handledEvent = page->deprecatedLocalMainFrame()->loader().client()->navigateBackForward(event->shiftKey() ? 1 : -1); |
| if (handledEvent) |
| event->setDefaultHandled(); |
| } |
| |
| void EventHandler::defaultArrowEventHandler(FocusType focusType, KeyboardEvent* event) |
| { |
| ASSERT(event->type() == EventTypeNames::keydown); |
| |
| if (event->ctrlKey() || event->metaKey() || event->altGraphKey() || 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() || event->altGraphKey()) |
| return; |
| |
| Page* page = m_frame->page(); |
| if (!page) |
| return; |
| if (!page->tabKeyCyclesThroughElements()) |
| return; |
| |
| FocusType focusType = event->shiftKey() ? FocusTypeBackward : FocusTypeForward; |
| |
| // 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 (RenderObject* r = element->renderer()) { |
| if (r->isTextField()) |
| toRenderTextControlSingleLine(r)->capsLockStateMayHaveChanged(); |
| } |
| } |
| } |
| |
| void EventHandler::setFrameWasScrolledByUser() |
| { |
| if (FrameView* view = m_frame->view()) |
| view->setWasScrolledByUser(true); |
| } |
| |
| bool EventHandler::passMousePressEventToScrollbar(MouseEventWithHitTestResults& mev) |
| { |
| // First try to use the frame scrollbar. |
| FrameView* view = m_frame->view(); |
| Scrollbar* scrollbar = view ? view->scrollbarAtPoint(mev.event().position()) : 0; |
| |
| // Then try the scrollbar in the hit test. |
| if (!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 : 0; |
| } |
| } |
| |
| 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(point); |
| |
| if (!frame || !frame->contentRenderer()) |
| return result; |
| if (frame->view()) { |
| IntRect rect = frame->view()->visibleContentRect(); |
| if (!rect.contains(roundedIntPoint(point))) |
| return result; |
| } |
| frame->contentRenderer()->hitTest(HitTestRequest(hitType), result); |
| return result; |
| } |
| |
| bool EventHandler::handleTouchEvent(const PlatformTouchEvent& event) |
| { |
| TRACE_EVENT0("webkit", "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()->windowToContents(point.pos())); |
| HitTestResult result; |
| if (!m_touchSequenceDocument) { |
| result = hitTestResultAtPoint(pagePoint, hitType); |
| } else if (m_touchSequenceDocument->frame()) { |
| LayoutPoint framePoint = roundedLayoutPoint(m_touchSequenceDocument->frame()->view()->windowToContents(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 = NodeRenderingTraversal::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()->chrome().client().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->hasTouchEventHandlers() || !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. |
| typedef WillBeHeapHashMap<EventTarget*, RefPtrWillBeMember<TouchList> > TargetTouchesHeapMap; |
| TargetTouchesHeapMap touchesByTarget; |
| |
| // Array of touches per state, used to assemble the 'changedTouches' list. |
| typedef WillBeHeapHashSet<RefPtrWillBeMember<EventTarget> > EventTargetSet; |
| 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 = 0; |
| 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. |
| // FIXME: Oilpan: We can remove the following .get() if EventTarget |
| // is on-heap. |
| touchTarget = m_touchSequenceDocument.get(); |
| targetFrame = m_touchSequenceDocument->frame(); |
| } |
| ASSERT(targetFrame); |
| |
| // pagePoint should always be relative to the target elements |
| // containing frame. |
| FloatPoint pagePoint = targetFrame->view()->windowToContents(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 (EventTargetSet::const_iterator it = targetsForState.begin(); it != targetsForState.end(); ++it) { |
| EventTarget* touchEventTarget = it->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()); |
| 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; |
| } |
| |
| TouchAction EventHandler::computeEffectiveTouchAction(const Node& node) |
| { |
| // Optimization to minimize risk of this new feature (behavior should be identical |
| // since there's no way to get non-default touch-action values). |
| if (!RuntimeEnabledFeatures::cssTouchActionEnabled()) |
| return TouchActionAuto; |
| |
| // 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 = NodeRenderingTraversal::parent(curNode)) { |
| if (RenderObject* renderer = curNode->renderer()) { |
| if (renderer->supportsTouchAction()) { |
| TouchAction action = renderer->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 (renderer->isBox() && toRenderBox(renderer)->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()->windowToContents(mev.event().position()); |
| if (m_frame->selection().contains(p)) { |
| VisiblePosition visiblePos( |
| mev.targetNode()->renderer()->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 && !m_mouseDownWasInSubframe) |
| 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) |
| { |
| // We can sometimes get a null widget! EventHandlerMac handles a null |
| // widget by returning false, so we do the same. |
| if (!widget) |
| return false; |
| |
| // 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); |
| } |
| |
| bool EventHandler::passWidgetMouseDownEventToWidget(const MouseEventWithHitTestResults& event) |
| { |
| // Figure out which view to send the event to. |
| if (!event.targetNode() || !event.targetNode()->renderer() || !event.targetNode()->renderer()->isWidget()) |
| return false; |
| return false; |
| } |
| |
| PassRefPtrWillBeRawPtr<Clipboard> EventHandler::createDraggingClipboard() const |
| { |
| return Clipboard::create(Clipboard::DragAndDrop, ClipboardWritable, 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 |
| } |
| |
| } // namespace WebCore |