| /* |
| * 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/input/EventHandler.h" |
| |
| #include "bindings/core/v8/ExceptionStatePlaceholder.h" |
| #include "core/HTMLNames.h" |
| #include "core/InputTypeNames.h" |
| #include "core/clipboard/DataObject.h" |
| #include "core/clipboard/DataTransfer.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/TouchList.h" |
| #include "core/dom/shadow/ComposedTreeTraversal.h" |
| #include "core/dom/shadow/ShadowRoot.h" |
| #include "core/editing/Editor.h" |
| #include "core/editing/FrameSelection.h" |
| #include "core/editing/SelectionController.h" |
| #include "core/events/DragEvent.h" |
| #include "core/events/EventPath.h" |
| #include "core/events/KeyboardEvent.h" |
| #include "core/events/MouseEvent.h" |
| #include "core/events/PointerEvent.h" |
| #include "core/events/TextEvent.h" |
| #include "core/events/TouchEvent.h" |
| #include "core/events/WheelEvent.h" |
| #include "core/fetch/ImageResource.h" |
| #include "core/frame/EventHandlerRegistry.h" |
| #include "core/frame/FrameHost.h" |
| #include "core/frame/FrameView.h" |
| #include "core/frame/LocalFrame.h" |
| #include "core/frame/Settings.h" |
| #include "core/frame/VisualViewport.h" |
| #include "core/html/HTMLDialogElement.h" |
| #include "core/html/HTMLFrameElementBase.h" |
| #include "core/html/HTMLFrameSetElement.h" |
| #include "core/html/HTMLInputElement.h" |
| #include "core/input/InputDeviceCapabilities.h" |
| #include "core/input/TouchActionUtil.h" |
| #include "core/layout/HitTestRequest.h" |
| #include "core/layout/HitTestResult.h" |
| #include "core/layout/LayoutPart.h" |
| #include "core/layout/LayoutTextControlSingleLine.h" |
| #include "core/layout/LayoutView.h" |
| #include "core/loader/DocumentLoader.h" |
| #include "core/loader/FrameLoader.h" |
| #include "core/loader/FrameLoaderClient.h" |
| #include "core/page/AutoscrollController.h" |
| #include "core/page/ChromeClient.h" |
| #include "core/page/DragController.h" |
| #include "core/page/DragState.h" |
| #include "core/page/FocusController.h" |
| #include "core/page/FrameTree.h" |
| #include "core/page/Page.h" |
| #include "core/page/SpatialNavigation.h" |
| #include "core/page/TouchAdjustment.h" |
| #include "core/page/scrolling/ScrollState.h" |
| #include "core/paint/DeprecatedPaintLayer.h" |
| #include "core/style/ComputedStyle.h" |
| #include "core/svg/SVGDocumentExtensions.h" |
| #include "platform/PlatformGestureEvent.h" |
| #include "platform/PlatformKeyboardEvent.h" |
| #include "platform/PlatformTouchEvent.h" |
| #include "platform/PlatformWheelEvent.h" |
| #include "platform/RuntimeEnabledFeatures.h" |
| #include "platform/TraceEvent.h" |
| #include "platform/WindowsKeyboardCodes.h" |
| #include "platform/geometry/FloatPoint.h" |
| #include "platform/graphics/Image.h" |
| #include "platform/heap/Handle.h" |
| #include "platform/scroll/ScrollAnimator.h" |
| #include "platform/scroll/Scrollbar.h" |
| #include "wtf/Assertions.h" |
| #include "wtf/CurrentTime.h" |
| #include "wtf/StdLibExtras.h" |
| #include "wtf/TemporaryChange.h" |
| |
| namespace blink { |
| |
| namespace { |
| |
| bool isNodeInDocument(Node* n) |
| { |
| return n && n->inDocument(); |
| } |
| |
| } |
| |
| using namespace HTMLNames; |
| |
| // The link drag hysteresis is much larger than the others because there |
| // needs to be enough space to cancel the link press without starting a link drag, |
| // and because dragging links is rare. |
| static const int LinkDragHysteresis = 40; |
| static const int ImageDragHysteresis = 5; |
| static const int TextDragHysteresis = 3; |
| static const int GeneralDragHysteresis = 3; |
| |
| // The amount of time to wait before sending a fake mouse event triggered |
| // during a scroll. |
| static const double fakeMouseMoveInterval = 0.1; |
| |
| // The amount of time to wait for a cursor update on style and layout changes |
| // Set to 50Hz, no need to be faster than common screen refresh rate |
| static const double cursorUpdateInterval = 0.02; |
| |
| 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 |
| |
| // Report Overscroll if OverscrollDelta is greater than minimumOverscrollDelta |
| // to maintain consistency as did in compositor. |
| static const float minimumOverscrollDelta = 0.1; |
| |
| enum NoCursorChangeType { NoCursorChange }; |
| |
| enum class DragInitiator { Mouse, Touch }; |
| |
| class OptionalCursor { |
| public: |
| OptionalCursor(NoCursorChangeType) : m_isCursorChange(false) { } |
| OptionalCursor(const Cursor& cursor) : m_isCursorChange(true), m_cursor(cursor) { } |
| |
| bool isCursorChange() const { return m_isCursorChange; } |
| const Cursor& cursor() const { ASSERT(m_isCursorChange); return m_cursor; } |
| |
| private: |
| bool m_isCursorChange; |
| Cursor m_cursor; |
| }; |
| |
| static inline ScrollGranularity wheelGranularityToScrollGranularity(WheelEvent* event) |
| { |
| unsigned deltaMode = event->deltaMode(); |
| if (deltaMode == WheelEvent::DOM_DELTA_PAGE) |
| return ScrollByPage; |
| if (deltaMode == WheelEvent::DOM_DELTA_LINE) |
| return ScrollByLine; |
| ASSERT(deltaMode == WheelEvent::DOM_DELTA_PIXEL); |
| return event->hasPreciseScrollingDeltas() ? ScrollByPrecisePixel : ScrollByPixel; |
| } |
| |
| // Refetch the event target node if it is removed or currently is the shadow node inside an <input> element. |
| // If a mouse event handler changes the input element type to one that has a widget associated, |
| // we'd like to EventHandler::handleMousePressEvent to pass the event to the widget and thus the |
| // event target node can't still be the shadow node. |
| static inline bool shouldRefetchEventTarget(const MouseEventWithHitTestResults& mev) |
| { |
| Node* targetNode = mev.innerNode(); |
| if (!targetNode || !targetNode->parentNode()) |
| return true; |
| return targetNode->isShadowRoot() && isHTMLInputElement(*toShadowRoot(targetNode)->host()); |
| } |
| |
| void recomputeScrollChain(const LocalFrame& frame, const Node& startNode, |
| WillBeHeapDeque<RefPtrWillBeMember<Element>>& scrollChain) |
| { |
| scrollChain.clear(); |
| |
| ASSERT(startNode.layoutObject()); |
| LayoutBox* curBox = startNode.layoutObject()->enclosingBox(); |
| |
| // Scrolling propagates along the containing block chain. |
| while (curBox && !curBox->isLayoutView()) { |
| Node* curNode = curBox->node(); |
| // FIXME: this should reject more elements, as part of crbug.com/410974. |
| if (curNode && curNode->isElementNode()) |
| scrollChain.prepend(toElement(curNode)); |
| curBox = curBox->containingBlock(); |
| } |
| |
| // FIXME: we should exclude the document in some cases, as part |
| // of crbug.com/410974. |
| scrollChain.prepend(frame.document()->documentElement()); |
| } |
| |
| EventHandler::EventHandler(LocalFrame* frame) |
| : m_frame(frame) |
| , m_mousePressed(false) |
| , m_capturesDragging(false) |
| , m_mouseDownMayStartDrag(false) |
| , m_selectionController(SelectionController::create(*frame)) |
| , m_hoverTimer(this, &EventHandler::hoverTimerFired) |
| , m_cursorUpdateTimer(this, &EventHandler::cursorUpdateTimerFired) |
| , m_mouseDownMayStartAutoscroll(false) |
| , m_fakeMouseMoveEventTimer(this, &EventHandler::fakeMouseMoveEventTimerFired) |
| , m_svgPan(false) |
| , m_resizeScrollableArea(nullptr) |
| , m_eventHandlerWillResetCapturingMouseEventsNode(0) |
| , m_clickCount(0) |
| , m_shouldOnlyFireDragOverEvent(false) |
| , m_accumulatedRootOverscroll(FloatSize()) |
| , m_mousePositionIsUnknown(true) |
| , m_mouseDownTimestamp(0) |
| , m_touchPressed(false) |
| , m_inPointerCanceledState(false) |
| , m_scrollGestureHandlingNode(nullptr) |
| , m_lastGestureScrollOverWidget(false) |
| , m_longTapShouldInvokeContextMenu(false) |
| , m_activeIntervalTimer(this, &EventHandler::activeIntervalTimerFired) |
| , m_lastShowPressTimestamp(0) |
| , m_deltaConsumedForScrollSequence(false) |
| { |
| } |
| |
| EventHandler::~EventHandler() |
| { |
| ASSERT(!m_fakeMouseMoveEventTimer.isActive()); |
| } |
| |
| DEFINE_TRACE(EventHandler) |
| { |
| #if ENABLE(OILPAN) |
| visitor->trace(m_frame); |
| visitor->trace(m_mousePressNode); |
| visitor->trace(m_resizeScrollableArea); |
| visitor->trace(m_capturingMouseEventsNode); |
| visitor->trace(m_nodeUnderMouse); |
| visitor->trace(m_lastNodeUnderMouse); |
| visitor->trace(m_lastMouseMoveEventSubframe); |
| visitor->trace(m_lastScrollbarUnderMouse); |
| visitor->trace(m_clickNode); |
| visitor->trace(m_dragTarget); |
| visitor->trace(m_frameSetBeingResized); |
| visitor->trace(m_previousWheelScrolledNode); |
| visitor->trace(m_scrollbarHandlingScrollGesture); |
| visitor->trace(m_targetForTouchID); |
| visitor->trace(m_touchSequenceDocument); |
| visitor->trace(m_scrollGestureHandlingNode); |
| visitor->trace(m_previousGestureScrolledNode); |
| visitor->trace(m_lastDeferredTapElement); |
| visitor->trace(m_currentScrollChain); |
| visitor->trace(m_selectionController); |
| #endif |
| } |
| |
| DragState& EventHandler::dragState() |
| { |
| DEFINE_STATIC_LOCAL(Persistent<DragState>, state, (new DragState())); |
| return *state; |
| } |
| |
| void EventHandler::clear() |
| { |
| m_hoverTimer.stop(); |
| m_cursorUpdateTimer.stop(); |
| m_fakeMouseMoveEventTimer.stop(); |
| m_activeIntervalTimer.stop(); |
| m_resizeScrollableArea = nullptr; |
| m_nodeUnderMouse = nullptr; |
| m_lastNodeUnderMouse = nullptr; |
| m_lastMouseMoveEventSubframe = nullptr; |
| m_lastScrollbarUnderMouse = nullptr; |
| m_clickCount = 0; |
| m_clickNode = nullptr; |
| m_frameSetBeingResized = nullptr; |
| m_dragTarget = nullptr; |
| m_shouldOnlyFireDragOverEvent = false; |
| m_mousePositionIsUnknown = true; |
| m_lastKnownMousePosition = IntPoint(); |
| m_lastKnownMouseGlobalPosition = IntPoint(); |
| m_lastMouseDownUserGestureToken.clear(); |
| m_mousePressNode = nullptr; |
| m_mousePressed = false; |
| m_capturesDragging = false; |
| m_capturingMouseEventsNode = nullptr; |
| m_previousWheelScrolledNode = nullptr; |
| m_targetForTouchID.clear(); |
| m_touchSequenceDocument.clear(); |
| m_touchSequenceUserGestureToken.clear(); |
| m_scrollGestureHandlingNode = nullptr; |
| m_lastGestureScrollOverWidget = false; |
| m_previousGestureScrolledNode = nullptr; |
| m_scrollbarHandlingScrollGesture = nullptr; |
| m_touchPressed = false; |
| m_pointerIdManager.clear(); |
| m_inPointerCanceledState = false; |
| m_mouseDownMayStartDrag = false; |
| m_lastShowPressTimestamp = 0; |
| m_lastDeferredTapElement = nullptr; |
| m_eventHandlerWillResetCapturingMouseEventsNode = false; |
| m_mouseDownMayStartAutoscroll = false; |
| m_svgPan = false; |
| m_mouseDownPos = IntPoint(); |
| m_mouseDownTimestamp = 0; |
| m_longTapShouldInvokeContextMenu = false; |
| m_dragStartPos = LayoutPoint(); |
| m_offsetFromResizeCorner = LayoutSize(); |
| m_mouseDown = PlatformMouseEvent(); |
| } |
| |
| void EventHandler::nodeWillBeRemoved(Node& nodeToBeRemoved) |
| { |
| if (nodeToBeRemoved.containsIncludingShadowDOM(m_clickNode.get())) { |
| // We don't dispatch click events if the mousedown node is removed |
| // before a mouseup event. It is compatible with IE and Firefox. |
| m_clickNode = nullptr; |
| } |
| } |
| |
| bool EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& event) |
| { |
| TRACE_EVENT0("blink", "EventHandler::handleMousePressEvent"); |
| |
| // Reset drag state. |
| dragState().m_dragSrc = nullptr; |
| |
| cancelFakeMouseMoveEvent(); |
| |
| m_frame->document()->updateLayoutIgnorePendingStylesheets(); |
| |
| if (FrameView* frameView = m_frame->view()) { |
| if (frameView->isPointInScrollbarCorner(event.event().position())) |
| return false; |
| } |
| |
| bool singleClick = event.event().clickCount() <= 1; |
| |
| m_mouseDownMayStartDrag = singleClick; |
| |
| selectionController().handleMousePressEvent(event); |
| |
| m_mouseDown = event.event(); |
| |
| if (m_frame->document()->isSVGDocument() && m_frame->document()->accessSVGExtensions().zoomAndPanEnabled()) { |
| if (event.event().shiftKey() && singleClick) { |
| m_svgPan = true; |
| m_frame->document()->accessSVGExtensions().startPan(m_frame->view()->rootFrameToContents(event.event().position())); |
| return true; |
| } |
| } |
| |
| // We don't do this at the start of mouse down handling, |
| // because we don't want to do it until we know we didn't hit a widget. |
| if (singleClick) |
| focusDocumentView(); |
| |
| Node* innerNode = event.innerNode(); |
| |
| m_mousePressNode = innerNode; |
| m_dragStartPos = event.event().position(); |
| |
| bool swallowEvent = false; |
| m_mousePressed = true; |
| |
| if (event.event().clickCount() == 2) |
| swallowEvent = selectionController().handleMousePressEventDoubleClick(event); |
| else if (event.event().clickCount() >= 3) |
| swallowEvent = selectionController().handleMousePressEventTripleClick(event); |
| else |
| swallowEvent = selectionController().handleMousePressEventSingleClick(event); |
| |
| m_mouseDownMayStartAutoscroll = selectionController().mouseDownMayStartSelect() |
| || (m_mousePressNode && m_mousePressNode->layoutBox() && m_mousePressNode->layoutBox()->canBeProgramaticallyScrolled()); |
| |
| return swallowEvent; |
| } |
| |
| bool EventHandler::handleMouseDraggedEvent(const MouseEventWithHitTestResults& event) |
| { |
| TRACE_EVENT0("blink", "EventHandler::handleMouseDraggedEvent"); |
| |
| // While resetting m_mousePressed here may seem out of place, it turns out |
| // to be needed to handle some bugs^Wfeatures in Blink mouse event handling: |
| // 1. Certain elements, such as <embed>, capture mouse events. They do not |
| // bubble back up. One way for a <embed> to start capturing mouse events |
| // is on a mouse press. The problem is the <embed> node only starts |
| // capturing mouse events *after* m_mousePressed for the containing frame |
| // has already been set to true. As a result, the frame's EventHandler |
| // never sees the mouse release event, which is supposed to reset |
| // m_mousePressed... so m_mousePressed ends up remaining true until the |
| // event handler finally gets another mouse released event. Oops. |
| // 2. Dragging doesn't start until after a mouse press event, but a drag |
| // that ends as a result of a mouse release does not send a mouse release |
| // event. As a result, m_mousePressed also ends up remaining true until |
| // the next mouse release event seen by the EventHandler. |
| if (event.event().button() != LeftButton) |
| m_mousePressed = false; |
| |
| if (!m_mousePressed) |
| return false; |
| |
| if (handleDrag(event, DragInitiator::Mouse)) |
| return true; |
| |
| Node* targetNode = event.innerNode(); |
| if (!targetNode) |
| return false; |
| |
| LayoutObject* layoutObject = targetNode->layoutObject(); |
| if (!layoutObject) { |
| Node* parent = ComposedTreeTraversal::parent(*targetNode); |
| if (!parent) |
| return false; |
| |
| layoutObject = parent->layoutObject(); |
| if (!layoutObject || !layoutObject->isListBox()) |
| return false; |
| } |
| |
| m_mouseDownMayStartDrag = false; |
| |
| if (m_mouseDownMayStartAutoscroll && !panScrollInProgress()) { |
| if (AutoscrollController* controller = autoscrollController()) { |
| controller->startAutoscrollForSelection(layoutObject); |
| m_mouseDownMayStartAutoscroll = false; |
| } |
| } |
| |
| selectionController().handleMouseDraggedEvent(event, m_mouseDownPos, m_dragStartPos, m_mousePressNode.get(), m_lastKnownMousePosition); |
| return true; |
| } |
| |
| void EventHandler::updateSelectionForMouseDrag() |
| { |
| selectionController().updateSelectionForMouseDrag(m_mousePressNode.get(), m_dragStartPos, m_lastKnownMousePosition); |
| } |
| |
| 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_mouseDownMayStartAutoscroll = false; |
| |
| return selectionController().handleMouseReleaseEvent(event, m_dragStartPos); |
| } |
| |
| #if OS(WIN) |
| |
| void EventHandler::startPanScrolling(LayoutObject* layoutObject) |
| { |
| if (!layoutObject->isBox()) |
| return; |
| AutoscrollController* controller = autoscrollController(); |
| if (!controller) |
| return; |
| controller->startPanScrolling(toLayoutBox(layoutObject), lastKnownMousePosition()); |
| invalidateClick(); |
| } |
| |
| #endif // OS(WIN) |
| |
| AutoscrollController* EventHandler::autoscrollController() const |
| { |
| if (Page* page = m_frame->page()) |
| return &page->autoscrollController(); |
| return nullptr; |
| } |
| |
| bool EventHandler::panScrollInProgress() const |
| { |
| return autoscrollController() && autoscrollController()->panScrollInProgress(); |
| } |
| |
| HitTestResult EventHandler::hitTestResultAtPoint(const LayoutPoint& point, HitTestRequest::HitTestRequestType hitType, const LayoutSize& padding) |
| { |
| TRACE_EVENT0("blink", "EventHandler::hitTestResultAtPoint"); |
| |
| ASSERT((hitType & HitTestRequest::ListBased) || padding.isEmpty()); |
| |
| // We always send hitTestResultAtPoint to the main frame if we have one, |
| // otherwise we might hit areas that are obscured by higher frames. |
| if (m_frame->page()) { |
| LocalFrame* mainFrame = m_frame->localFrameRoot(); |
| if (mainFrame && m_frame != mainFrame) { |
| FrameView* frameView = m_frame->view(); |
| FrameView* mainView = mainFrame->view(); |
| if (frameView && mainView) { |
| IntPoint mainFramePoint = mainView->rootFrameToContents(frameView->contentsToRootFrame(roundedIntPoint(point))); |
| return mainFrame->eventHandler().hitTestResultAtPoint(mainFramePoint, hitType, padding); |
| } |
| } |
| } |
| |
| // hitTestResultAtPoint is specifically used to hitTest into all frames, thus it always allows child frame content. |
| HitTestRequest request(hitType | HitTestRequest::AllowChildFrameContent); |
| HitTestResult result(request, point, padding.height(), padding.width(), padding.height(), padding.width()); |
| |
| // LayoutView::hitTest causes a layout, and we don't want to hit that until the first |
| // layout because until then, there is nothing shown on the screen - the user can't |
| // have intentionally clicked on something belonging to this page. Furthermore, |
| // mousemove events before the first layout should not lead to a premature layout() |
| // happening, which could show a flash of white. |
| // See also the similar code in Document::prepareMouseEvent. |
| if (!m_frame->contentLayoutObject() || !m_frame->view() || !m_frame->view()->didFirstLayout()) |
| return result; |
| |
| m_frame->contentLayoutObject()->hitTest(result); |
| if (!request.readOnly()) |
| m_frame->document()->updateHoverActiveState(request, result.innerElement()); |
| |
| return result; |
| } |
| |
| void EventHandler::stopAutoscroll() |
| { |
| if (AutoscrollController* controller = autoscrollController()) |
| controller->stopAutoscroll(); |
| } |
| |
| ScrollResultOneDimensional EventHandler::scroll(ScrollDirection direction, ScrollGranularity granularity, Node* startNode, Node** stopNode, float delta, IntPoint absolutePoint) |
| { |
| if (!delta) |
| return ScrollResultOneDimensional(false); |
| |
| Node* node = startNode; |
| |
| if (!node) |
| node = m_frame->document()->focusedElement(); |
| |
| if (!node) |
| node = m_mousePressNode.get(); |
| |
| if (!node || !node->layoutObject()) |
| return ScrollResultOneDimensional(false, delta); |
| |
| m_frame->document()->updateLayoutIgnorePendingStylesheets(); |
| |
| LayoutBox* curBox = node->layoutObject()->enclosingBox(); |
| while (curBox && !curBox->isLayoutView()) { |
| ScrollDirectionPhysical physicalDirection = toPhysicalDirection( |
| direction, curBox->isHorizontalWritingMode(), curBox->style()->isFlippedBlocksWritingMode()); |
| |
| // If we're at the stopNode, we should try to scroll it but we shouldn't bubble past it |
| bool shouldStopBubbling = stopNode && *stopNode && curBox->node() == *stopNode; |
| ScrollResultOneDimensional result = curBox->scroll(physicalDirection, granularity, delta); |
| |
| if (result.didScroll && stopNode) |
| *stopNode = curBox->node(); |
| |
| if (result.didScroll || shouldStopBubbling) { |
| setFrameWasScrolledByUser(); |
| result.didScroll = true; |
| return result; |
| } |
| |
| curBox = curBox->containingBlock(); |
| } |
| |
| return ScrollResultOneDimensional(false, delta); |
| } |
| |
| void EventHandler::customizedScroll(const Node& startNode, ScrollState& scrollState) |
| { |
| if (scrollState.fullyConsumed()) |
| return; |
| |
| if (scrollState.deltaX() || scrollState.deltaY()) |
| m_frame->document()->updateLayoutIgnorePendingStylesheets(); |
| |
| if (m_currentScrollChain.isEmpty()) |
| recomputeScrollChain(*m_frame, startNode, m_currentScrollChain); |
| scrollState.setScrollChain(m_currentScrollChain); |
| scrollState.distributeToScrollChainDescendant(); |
| } |
| |
| bool EventHandler::bubblingScroll(ScrollDirection direction, ScrollGranularity granularity, Node* startingNode) |
| { |
| // The layout needs to be up to date to determine if we can scroll. We may be |
| // here because of an onLoad event, in which case the final layout hasn't been performed yet. |
| m_frame->document()->updateLayoutIgnorePendingStylesheets(); |
| // FIXME: enable scroll customization in this case. See crbug.com/410974. |
| if (scroll(direction, granularity, startingNode).didScroll) |
| return true; |
| LocalFrame* frame = m_frame; |
| FrameView* view = frame->view(); |
| if (view) { |
| ScrollDirectionPhysical physicalDirection = |
| toPhysicalDirection(direction, view->isVerticalDocument(), view->isFlippedDocument()); |
| if (view->scrollableArea()->userScroll(physicalDirection, granularity).didScroll) { |
| setFrameWasScrolledByUser(); |
| 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 nullptr; |
| |
| LayoutObject* layoutObject = node->layoutObject(); |
| if (!layoutObject || !layoutObject->isLayoutPart()) |
| return nullptr; |
| |
| Widget* widget = toLayoutPart(layoutObject)->widget(); |
| if (!widget || !widget->isFrameView()) |
| return nullptr; |
| |
| return &toFrameView(widget)->frame(); |
| } |
| |
| static LocalFrame* subframeForHitTestResult(const MouseEventWithHitTestResults& hitTestResult) |
| { |
| if (!hitTestResult.isOverWidget()) |
| return nullptr; |
| return subframeForTargetNode(hitTestResult.innerNode()); |
| } |
| |
| static bool isSubmitImage(Node* node) |
| { |
| return isHTMLInputElement(node) && toHTMLInputElement(node)->type() == InputTypeNames::image; |
| } |
| |
| bool EventHandler::useHandCursor(Node* node, bool isOverLink) |
| { |
| if (!node) |
| return false; |
| |
| return ((isOverLink || isSubmitImage(node)) && !node->hasEditableStyle()); |
| } |
| |
| void EventHandler::cursorUpdateTimerFired(Timer<EventHandler>*) |
| { |
| ASSERT(m_frame); |
| ASSERT(m_frame->document()); |
| |
| updateCursor(); |
| } |
| |
| void EventHandler::updateCursor() |
| { |
| TRACE_EVENT0("input", "EventHandler::updateCursor"); |
| |
| // We must do a cross-frame hit test because the frame that triggered the cursor |
| // update could be occluded by a different frame. |
| ASSERT(m_frame == m_frame->localFrameRoot()); |
| |
| if (m_mousePositionIsUnknown) |
| return; |
| |
| FrameView* view = m_frame->view(); |
| if (!view || !view->shouldSetCursor()) |
| return; |
| |
| LayoutView* layoutView = view->layoutView(); |
| if (!layoutView) |
| return; |
| |
| m_frame->document()->updateLayout(); |
| |
| HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::AllowChildFrameContent); |
| HitTestResult result(request, view->rootFrameToContents(m_lastKnownMousePosition)); |
| layoutView->hitTest(result); |
| |
| if (LocalFrame* frame = result.innerNodeFrame()) { |
| OptionalCursor optionalCursor = frame->eventHandler().selectCursor(result); |
| if (optionalCursor.isCursorChange()) { |
| view->setCursor(optionalCursor.cursor()); |
| } |
| } |
| } |
| |
| OptionalCursor EventHandler::selectCursor(const HitTestResult& result) |
| { |
| if (m_resizeScrollableArea && m_resizeScrollableArea->inResizeMode()) |
| return NoCursorChange; |
| |
| Page* page = m_frame->page(); |
| if (!page) |
| return NoCursorChange; |
| if (panScrollInProgress()) |
| return NoCursorChange; |
| |
| Node* node = result.innerPossiblyPseudoNode(); |
| if (!node) |
| return selectAutoCursor(result, node, iBeamCursor()); |
| |
| LayoutObject* layoutObject = node->layoutObject(); |
| const ComputedStyle* style = layoutObject ? layoutObject->style() : nullptr; |
| |
| if (layoutObject) { |
| Cursor overrideCursor; |
| switch (layoutObject->getCursor(roundedIntPoint(result.localPoint()), overrideCursor)) { |
| case SetCursorBasedOnStyle: |
| break; |
| case SetCursor: |
| return overrideCursor; |
| case DoNotSetCursor: |
| return NoCursorChange; |
| } |
| } |
| |
| if (style && style->cursors()) { |
| const CursorList* cursors = style->cursors(); |
| for (unsigned i = 0; i < cursors->size(); ++i) { |
| StyleImage* styleImage = (*cursors)[i].image(); |
| if (!styleImage) |
| continue; |
| ImageResource* cachedImage = styleImage->cachedImage(); |
| if (!cachedImage) |
| continue; |
| float scale = styleImage->imageScaleFactor(); |
| bool hotSpotSpecified = (*cursors)[i].hotSpotSpecified(); |
| // Get hotspot and convert from logical pixels to physical pixels. |
| IntPoint hotSpot = (*cursors)[i].hotSpot(); |
| hotSpot.scale(scale, scale); |
| IntSize size = cachedImage->imageForLayoutObject(layoutObject)->size(); |
| if (cachedImage->errorOccurred()) |
| continue; |
| // Limit the size of cursors (in UI pixels) so that they cannot be |
| // used to cover UI elements in chrome. |
| size.scale(1 / scale); |
| if (size.width() > maximumCursorSize || size.height() > maximumCursorSize) |
| continue; |
| |
| Image* image = cachedImage->imageForLayoutObject(layoutObject); |
| // Ensure no overflow possible in calculations above. |
| if (scale < minimumCursorScale) |
| continue; |
| return Cursor(image, hotSpotSpecified, hotSpot, scale); |
| } |
| } |
| |
| switch (style ? style->cursor() : CURSOR_AUTO) { |
| case CURSOR_AUTO: { |
| bool horizontalText = !style || style->isHorizontalWritingMode(); |
| const Cursor& iBeam = horizontalText ? iBeamCursor() : verticalTextCursor(); |
| return selectAutoCursor(result, node, iBeam); |
| } |
| case CURSOR_CROSS: |
| return crossCursor(); |
| case CURSOR_POINTER: |
| return handCursor(); |
| case CURSOR_MOVE: |
| return moveCursor(); |
| case CURSOR_ALL_SCROLL: |
| return moveCursor(); |
| case CURSOR_E_RESIZE: |
| return eastResizeCursor(); |
| case CURSOR_W_RESIZE: |
| return westResizeCursor(); |
| case CURSOR_N_RESIZE: |
| return northResizeCursor(); |
| case CURSOR_S_RESIZE: |
| return southResizeCursor(); |
| case CURSOR_NE_RESIZE: |
| return northEastResizeCursor(); |
| case CURSOR_SW_RESIZE: |
| return southWestResizeCursor(); |
| case CURSOR_NW_RESIZE: |
| return northWestResizeCursor(); |
| case CURSOR_SE_RESIZE: |
| return southEastResizeCursor(); |
| case CURSOR_NS_RESIZE: |
| return northSouthResizeCursor(); |
| case CURSOR_EW_RESIZE: |
| return eastWestResizeCursor(); |
| case CURSOR_NESW_RESIZE: |
| return northEastSouthWestResizeCursor(); |
| case CURSOR_NWSE_RESIZE: |
| return northWestSouthEastResizeCursor(); |
| case CURSOR_COL_RESIZE: |
| return columnResizeCursor(); |
| case CURSOR_ROW_RESIZE: |
| return rowResizeCursor(); |
| case CURSOR_TEXT: |
| return iBeamCursor(); |
| case CURSOR_WAIT: |
| return waitCursor(); |
| case CURSOR_HELP: |
| return helpCursor(); |
| case CURSOR_VERTICAL_TEXT: |
| return verticalTextCursor(); |
| case CURSOR_CELL: |
| return cellCursor(); |
| case CURSOR_CONTEXT_MENU: |
| return contextMenuCursor(); |
| case CURSOR_PROGRESS: |
| return progressCursor(); |
| case CURSOR_NO_DROP: |
| return noDropCursor(); |
| case CURSOR_ALIAS: |
| return aliasCursor(); |
| case CURSOR_COPY: |
| return copyCursor(); |
| case CURSOR_NONE: |
| return noneCursor(); |
| case CURSOR_NOT_ALLOWED: |
| return notAllowedCursor(); |
| case CURSOR_DEFAULT: |
| return pointerCursor(); |
| case CURSOR_ZOOM_IN: |
| return zoomInCursor(); |
| case CURSOR_ZOOM_OUT: |
| return zoomOutCursor(); |
| case CURSOR_WEBKIT_GRAB: |
| return grabCursor(); |
| case CURSOR_WEBKIT_GRABBING: |
| return grabbingCursor(); |
| } |
| return pointerCursor(); |
| } |
| |
| OptionalCursor EventHandler::selectAutoCursor(const HitTestResult& result, Node* node, const Cursor& iBeam) |
| { |
| bool editable = (node && node->hasEditableStyle()); |
| |
| if (useHandCursor(node, result.isOverLink())) |
| return handCursor(); |
| |
| bool inResizer = false; |
| LayoutObject* layoutObject = node ? node->layoutObject() : nullptr; |
| if (layoutObject && m_frame->view()) { |
| DeprecatedPaintLayer* layer = layoutObject->enclosingLayer(); |
| inResizer = layer->scrollableArea() && layer->scrollableArea()->isPointInResizeControl(result.roundedPointInMainFrame(), ResizerForPointer); |
| } |
| |
| // During selection, use an I-beam no matter what we're over. |
| // If a drag may be starting or we're capturing mouse events for a particular node, don't treat this as a selection. |
| if (m_mousePressed && selectionController().mouseDownMayStartSelect() |
| && !m_mouseDownMayStartDrag |
| && m_frame->selection().isCaretOrRange() |
| && !m_capturingMouseEventsNode) { |
| return iBeam; |
| } |
| |
| if ((editable || (layoutObject && layoutObject->isText() && node->canStartSelection())) && !inResizer && !result.scrollbar()) |
| return iBeam; |
| return pointerCursor(); |
| } |
| |
| static LayoutPoint contentPointFromRootFrame(LocalFrame* frame, const IntPoint& pointInRootFrame) |
| { |
| FrameView* view = frame->view(); |
| // FIXME: Is it really OK to use the wrong coordinates here when view is 0? |
| // Historically the code would just crash; this is clearly no worse than that. |
| return view ? view->rootFrameToContents(pointInRootFrame) : pointInRootFrame; |
| } |
| |
| bool EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent) |
| { |
| TRACE_EVENT0("blink", "EventHandler::handleMousePressEvent"); |
| |
| RefPtrWillBeRawPtr<FrameView> protector(m_frame->view()); |
| |
| UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture); |
| m_frame->localFrameRoot()->eventHandler().m_lastMouseDownUserGestureToken = gestureIndicator.currentToken(); |
| |
| cancelFakeMouseMoveEvent(); |
| if (m_eventHandlerWillResetCapturingMouseEventsNode) |
| m_capturingMouseEventsNode = nullptr; |
| m_mousePressed = true; |
| m_capturesDragging = true; |
| setLastKnownMousePosition(mouseEvent); |
| m_mouseDownTimestamp = mouseEvent.timestamp(); |
| m_mouseDownMayStartDrag = false; |
| selectionController().setMouseDownMayStartSelect(false); |
| m_mouseDownMayStartAutoscroll = false; |
| if (FrameView* view = m_frame->view()) { |
| m_mouseDownPos = view->rootFrameToContents(mouseEvent.position()); |
| } else { |
| invalidateClick(); |
| return false; |
| } |
| |
| HitTestRequest request(HitTestRequest::Active); |
| // Save the document point we generate in case the window coordinate is invalidated by what happens |
| // when we dispatch the event. |
| LayoutPoint documentPoint = contentPointFromRootFrame(m_frame, mouseEvent.position()); |
| MouseEventWithHitTestResults mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent); |
| |
| if (!mev.innerNode()) { |
| invalidateClick(); |
| return false; |
| } |
| |
| m_mousePressNode = mev.innerNode(); |
| |
| RefPtrWillBeRawPtr<LocalFrame> subframe = subframeForHitTestResult(mev); |
| if (subframe && passMousePressEventToSubframe(mev, subframe.get())) { |
| // Start capturing future events for this frame. We only do this if we didn't clear |
| // the m_mousePressed flag, which may happen if an AppKit widget entered a modal event loop. |
| m_capturesDragging = subframe->eventHandler().capturesDragging(); |
| if (m_mousePressed && m_capturesDragging) { |
| m_capturingMouseEventsNode = mev.innerNode(); |
| m_eventHandlerWillResetCapturingMouseEventsNode = true; |
| } |
| invalidateClick(); |
| return true; |
| } |
| |
| #if OS(WIN) |
| // We store whether pan scrolling is in progress before calling stopAutoscroll() |
| // because it will set m_autoscrollType to NoAutoscroll on return. |
| bool isPanScrollInProgress = panScrollInProgress(); |
| stopAutoscroll(); |
| if (isPanScrollInProgress) { |
| // We invalidate the click when exiting pan scrolling so that we don't inadvertently navigate |
| // away from the current page (e.g. the click was on a hyperlink). See <rdar://problem/6095023>. |
| invalidateClick(); |
| return true; |
| } |
| #endif |
| |
| m_clickCount = mouseEvent.clickCount(); |
| m_clickNode = mev.innerNode()->isTextNode() ? ComposedTreeTraversal::parent(*mev.innerNode()) : mev.innerNode(); |
| |
| if (FrameView* view = m_frame->view()) { |
| DeprecatedPaintLayer* layer = mev.innerNode()->layoutObject() ? mev.innerNode()->layoutObject()->enclosingLayer() : nullptr; |
| IntPoint p = view->rootFrameToContents(mouseEvent.position()); |
| if (layer && layer->scrollableArea() && layer->scrollableArea()->isPointInResizeControl(p, ResizerForPointer)) { |
| m_resizeScrollableArea = layer->scrollableArea(); |
| m_resizeScrollableArea->setInResizeMode(true); |
| m_offsetFromResizeCorner = LayoutSize(m_resizeScrollableArea->offsetFromResizeCorner(p)); |
| invalidateClick(); |
| return true; |
| } |
| } |
| |
| m_frame->selection().setCaretBlinkingSuspended(true); |
| |
| bool swallowEvent = !dispatchMouseEvent(EventTypeNames::mousedown, mev.innerNode(), m_clickCount, mouseEvent, true); |
| // m_selectionInitiationState is initialized after dispatching mousedown |
| // event in order not to keep the selection by DOM APIs Because we can't |
| // give the user the chance to handle the selection by user action like |
| // dragging if we keep the selection in case of mousedown. FireFox also has |
| // the same behavior and it's more compatible with other browsers. |
| selectionController().initializeSelectionState(); |
| HitTestResult hitTestResult = hitTestResultInFrame(m_frame, mouseEvent.position(), HitTestRequest::ReadOnly); |
| InputDeviceCapabilities* sourceCapabilities = mouseEvent.syntheticEventType() == PlatformMouseEvent::FromTouch ? InputDeviceCapabilities::firesTouchEventsSourceCapabilities() : |
| InputDeviceCapabilities::doesntFireTouchEventsSourceCapabilities(); |
| swallowEvent = swallowEvent || handleMouseFocus(MouseEventWithHitTestResults(mouseEvent, hitTestResult), sourceCapabilities); |
| m_capturesDragging = !swallowEvent || mev.scrollbar(); |
| |
| // If the hit testing originally determined the event was in a scrollbar, refetch the MouseEventWithHitTestResults |
| // in case the scrollbar widget was destroyed when the mouse event was handled. |
| if (mev.scrollbar()) { |
| const bool wasLastScrollBar = mev.scrollbar() == m_lastScrollbarUnderMouse.get(); |
| HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active); |
| mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent); |
| if (wasLastScrollBar && mev.scrollbar() != m_lastScrollbarUnderMouse.get()) |
| m_lastScrollbarUnderMouse = nullptr; |
| } |
| |
| if (swallowEvent) { |
| // scrollbars should get events anyway, even disabled controls might be scrollable |
| passMousePressEventToScrollbar(mev); |
| } else { |
| if (shouldRefetchEventTarget(mev)) { |
| HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active); |
| mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent); |
| } |
| |
| if (passMousePressEventToScrollbar(mev)) |
| swallowEvent = true; |
| else |
| swallowEvent = handleMousePressEvent(mev); |
| } |
| |
| if (mev.hitTestResult().innerNode() && mouseEvent.button() == LeftButton) { |
| ASSERT(mouseEvent.type() == PlatformEvent::MousePressed); |
| HitTestResult result = mev.hitTestResult(); |
| result.setToShadowHostIfInUserAgentShadowRoot(); |
| m_frame->chromeClient().onMouseDown(result.innerNode()); |
| } |
| |
| return swallowEvent; |
| } |
| |
| static DeprecatedPaintLayer* layerForNode(Node* node) |
| { |
| if (!node) |
| return nullptr; |
| |
| LayoutObject* layoutObject = node->layoutObject(); |
| if (!layoutObject) |
| return nullptr; |
| |
| DeprecatedPaintLayer* layer = layoutObject->enclosingLayer(); |
| if (!layer) |
| return nullptr; |
| |
| return layer; |
| } |
| |
| ScrollableArea* EventHandler::associatedScrollableArea(const DeprecatedPaintLayer* layer) const |
| { |
| if (DeprecatedPaintLayerScrollableArea* scrollableArea = layer->scrollableArea()) { |
| if (scrollableArea->scrollsOverflow()) |
| return scrollableArea; |
| } |
| |
| return nullptr; |
| } |
| |
| bool EventHandler::handleMouseMoveEvent(const PlatformMouseEvent& event) |
| { |
| TRACE_EVENT0("blink", "EventHandler::handleMouseMoveEvent"); |
| |
| RefPtrWillBeRawPtr<FrameView> protector(m_frame->view()); |
| |
| HitTestResult hoveredNode = HitTestResult(); |
| bool result = handleMouseMoveOrLeaveEvent(event, &hoveredNode); |
| |
| Page* page = m_frame->page(); |
| if (!page) |
| return result; |
| |
| if (DeprecatedPaintLayer* layer = layerForNode(hoveredNode.innerNode())) { |
| if (ScrollableArea* layerScrollableArea = associatedScrollableArea(layer)) |
| layerScrollableArea->mouseMovedInContentArea(); |
| } |
| |
| if (FrameView* frameView = m_frame->view()) |
| frameView->mouseMovedInContentArea(); |
| |
| hoveredNode.setToShadowHostIfInUserAgentShadowRoot(); |
| page->chromeClient().mouseDidMoveOverElement(hoveredNode); |
| |
| return result; |
| } |
| |
| void EventHandler::handleMouseLeaveEvent(const PlatformMouseEvent& event) |
| { |
| TRACE_EVENT0("blink", "EventHandler::handleMouseLeaveEvent"); |
| |
| RefPtrWillBeRawPtr<FrameView> protector(m_frame->view()); |
| handleMouseMoveOrLeaveEvent(event, 0, false, true); |
| } |
| |
| bool EventHandler::handleMouseMoveOrLeaveEvent(const PlatformMouseEvent& mouseEvent, HitTestResult* hoveredNode, bool onlyUpdateScrollbars, bool forceLeave) |
| { |
| ASSERT(m_frame); |
| ASSERT(m_frame->view()); |
| |
| setLastKnownMousePosition(mouseEvent); |
| |
| if (m_hoverTimer.isActive()) |
| m_hoverTimer.stop(); |
| |
| m_cursorUpdateTimer.stop(); |
| |
| cancelFakeMouseMoveEvent(); |
| |
| if (m_svgPan) { |
| m_frame->document()->accessSVGExtensions().updatePan(m_frame->view()->rootFrameToContents(m_lastKnownMousePosition)); |
| return true; |
| } |
| |
| if (m_frameSetBeingResized) |
| return !dispatchMouseEvent(EventTypeNames::mousemove, m_frameSetBeingResized.get(), 0, mouseEvent, false); |
| |
| // Send events right to a scrollbar if the mouse is pressed. |
| if (m_lastScrollbarUnderMouse && m_mousePressed) { |
| m_lastScrollbarUnderMouse->mouseMoved(mouseEvent); |
| return true; |
| } |
| |
| // Mouse events simulated from touch should not hit-test again. |
| ASSERT(!mouseEvent.fromTouch()); |
| |
| HitTestRequest::HitTestRequestType hitType = HitTestRequest::Move; |
| if (m_mousePressed) { |
| hitType |= HitTestRequest::Active; |
| } else if (onlyUpdateScrollbars) { |
| // Mouse events should be treated as "read-only" if we're updating only scrollbars. This |
| // means that :hover and :active freeze in the state they were in, rather than updating |
| // for nodes the mouse moves while the window is not key (which will be the case if |
| // onlyUpdateScrollbars is true). |
| hitType |= HitTestRequest::ReadOnly; |
| } |
| |
| // Treat any mouse move events as readonly if the user is currently touching the screen. |
| if (m_touchPressed) |
| hitType |= HitTestRequest::Active | HitTestRequest::ReadOnly; |
| HitTestRequest request(hitType); |
| MouseEventWithHitTestResults mev = MouseEventWithHitTestResults(mouseEvent, HitTestResult(request, LayoutPoint())); |
| |
| // We don't want to do a hit-test in forceLeave scenarios because there might actually be some other frame above this one at the specified co-ordinate. |
| // So we must force the hit-test to fail, while still clearing hover/active state. |
| if (forceLeave) |
| m_frame->document()->updateHoverActiveState(request, 0); |
| else |
| mev = prepareMouseEvent(request, mouseEvent); |
| |
| if (hoveredNode) |
| *hoveredNode = mev.hitTestResult(); |
| |
| Scrollbar* scrollbar = nullptr; |
| |
| if (m_resizeScrollableArea && m_resizeScrollableArea->inResizeMode()) { |
| m_resizeScrollableArea->resize(mouseEvent, m_offsetFromResizeCorner); |
| } else { |
| if (!scrollbar) |
| scrollbar = mev.scrollbar(); |
| |
| updateLastScrollbarUnderMouse(scrollbar, !m_mousePressed); |
| if (onlyUpdateScrollbars) |
| return true; |
| } |
| |
| bool swallowEvent = false; |
| RefPtrWillBeRawPtr<LocalFrame> newSubframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev); |
| |
| // We want mouseouts to happen first, from the inside out. First send a move event to the last subframe so that it will fire mouseouts. |
| if (m_lastMouseMoveEventSubframe && m_lastMouseMoveEventSubframe->tree().isDescendantOf(m_frame) && m_lastMouseMoveEventSubframe != newSubframe) |
| m_lastMouseMoveEventSubframe->eventHandler().handleMouseLeaveEvent(mouseEvent); |
| |
| if (newSubframe) { |
| // Update over/out state before passing the event to the subframe. |
| updateMouseEventTargetNode(mev.innerNode(), mouseEvent, true); |
| |
| // Event dispatch in updateMouseEventTargetNode may have caused the subframe of the target |
| // node to be detached from its FrameView, in which case the event should not be passed. |
| if (newSubframe->view()) |
| swallowEvent |= passMouseMoveEventToSubframe(mev, newSubframe.get(), hoveredNode); |
| } else { |
| if (scrollbar && !m_mousePressed) |
| scrollbar->mouseMoved(mouseEvent); // Handle hover effects on platforms that support visual feedback on scrollbar hovering. |
| if (FrameView* view = m_frame->view()) { |
| OptionalCursor optionalCursor = selectCursor(mev.hitTestResult()); |
| if (optionalCursor.isCursorChange()) { |
| view->setCursor(optionalCursor.cursor()); |
| } |
| } |
| } |
| |
| m_lastMouseMoveEventSubframe = newSubframe; |
| |
| if (swallowEvent) |
| return true; |
| |
| swallowEvent = !dispatchMouseEvent(EventTypeNames::mousemove, mev.innerNode(), 0, mouseEvent, true); |
| if (!swallowEvent) |
| swallowEvent = handleMouseDraggedEvent(mev); |
| |
| return swallowEvent; |
| } |
| |
| void EventHandler::invalidateClick() |
| { |
| m_clickCount = 0; |
| m_clickNode = nullptr; |
| } |
| |
| static ContainerNode* parentForClickEvent(const Node& node) |
| { |
| // IE doesn't dispatch click events for mousedown/mouseup events across form |
| // controls. |
| if (node.isHTMLElement() && toHTMLElement(node).isInteractiveContent()) |
| return nullptr; |
| |
| return ComposedTreeTraversal::parent(node); |
| } |
| |
| bool EventHandler::handleMouseReleaseEvent(const PlatformMouseEvent& mouseEvent) |
| { |
| TRACE_EVENT0("blink", "EventHandler::handleMouseReleaseEvent"); |
| |
| RefPtrWillBeRawPtr<FrameView> protector(m_frame->view()); |
| |
| m_frame->selection().setCaretBlinkingSuspended(false); |
| |
| OwnPtr<UserGestureIndicator> gestureIndicator; |
| |
| if (m_frame->localFrameRoot()->eventHandler().m_lastMouseDownUserGestureToken) |
| gestureIndicator = adoptPtr(new UserGestureIndicator(m_frame->localFrameRoot()->eventHandler().m_lastMouseDownUserGestureToken.release())); |
| else |
| gestureIndicator = adoptPtr(new UserGestureIndicator(DefinitelyProcessingUserGesture)); |
| |
| #if OS(WIN) |
| if (Page* page = m_frame->page()) |
| page->autoscrollController().handleMouseReleaseForPanScrolling(m_frame, mouseEvent); |
| #endif |
| |
| m_mousePressed = false; |
| setLastKnownMousePosition(mouseEvent); |
| |
| if (m_svgPan) { |
| m_svgPan = false; |
| m_frame->document()->accessSVGExtensions().updatePan(m_frame->view()->rootFrameToContents(m_lastKnownMousePosition)); |
| return true; |
| } |
| |
| if (m_frameSetBeingResized) |
| return !dispatchMouseEvent(EventTypeNames::mouseup, m_frameSetBeingResized.get(), m_clickCount, mouseEvent, false); |
| |
| if (m_lastScrollbarUnderMouse) { |
| invalidateClick(); |
| m_lastScrollbarUnderMouse->mouseUp(mouseEvent); |
| bool setUnder = false; |
| return !dispatchMouseEvent(EventTypeNames::mouseup, m_nodeUnderMouse.get(), m_clickCount, mouseEvent, setUnder); |
| } |
| |
| // Mouse events simulated from touch should not hit-test again. |
| ASSERT(!mouseEvent.fromTouch()); |
| |
| HitTestRequest::HitTestRequestType hitType = HitTestRequest::Release; |
| HitTestRequest request(hitType); |
| MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent); |
| LocalFrame* subframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev); |
| if (m_eventHandlerWillResetCapturingMouseEventsNode) |
| m_capturingMouseEventsNode = nullptr; |
| if (subframe && passMouseReleaseEventToSubframe(mev, subframe)) |
| return true; |
| |
| bool swallowMouseUpEvent = !dispatchMouseEvent(EventTypeNames::mouseup, mev.innerNode(), m_clickCount, mouseEvent, false); |
| |
| bool contextMenuEvent = mouseEvent.button() == RightButton; |
| #if OS(MACOSX) |
| // FIXME: The Mac port achieves the same behavior by checking whether the context menu is currently open in WebPage::mouseEvent(). Consider merging the implementations. |
| if (mouseEvent.button() == LeftButton && mouseEvent.modifiers() & PlatformEvent::CtrlKey) |
| contextMenuEvent = true; |
| #endif |
| |
| bool swallowClickEvent = false; |
| if (m_clickCount > 0 && !contextMenuEvent && mev.innerNode() && m_clickNode && mev.innerNode()->canParticipateInComposedTree() && m_clickNode->canParticipateInComposedTree()) { |
| // Updates distribution because a 'mouseup' event listener can make the |
| // tree dirty at dispatchMouseEvent() invocation above. |
| // Unless distribution is updated, commonAncestor would hit ASSERT. |
| // Both m_clickNode and mev.innerNode() don't need to be updated |
| // because commonAncestor() will exit early if their documents are different. |
| m_clickNode->updateDistribution(); |
| if (Node* clickTargetNode = mev.innerNode()->commonAncestor(*m_clickNode, parentForClickEvent)) |
| swallowClickEvent = !dispatchMouseEvent(EventTypeNames::click, clickTargetNode, m_clickCount, mouseEvent, true); |
| } |
| |
| if (m_resizeScrollableArea) { |
| m_resizeScrollableArea->setInResizeMode(false); |
| m_resizeScrollableArea = nullptr; |
| } |
| |
| bool swallowMouseReleaseEvent = false; |
| if (!swallowMouseUpEvent) |
| swallowMouseReleaseEvent = handleMouseReleaseEvent(mev); |
| |
| invalidateClick(); |
| |
| return swallowMouseUpEvent || swallowClickEvent || swallowMouseReleaseEvent; |
| } |
| |
| bool EventHandler::dispatchDragEvent(const AtomicString& eventType, Node* dragTarget, const PlatformMouseEvent& event, DataTransfer* dataTransfer) |
| { |
| FrameView* view = m_frame->view(); |
| |
| // FIXME: We might want to dispatch a dragleave even if the view is gone. |
| if (!view) |
| return false; |
| |
| RefPtrWillBeRawPtr<DragEvent> me = DragEvent::create(eventType, |
| true, true, m_frame->document()->domWindow(), |
| 0, event.globalPosition().x(), event.globalPosition().y(), event.position().x(), event.position().y(), |
| event.movementDelta().x(), event.movementDelta().y(), |
| event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(), |
| 0, MouseEvent::platformModifiersToButtons(event.modifiers()), nullptr, dataTransfer, false, event.syntheticEventType(), event.timestamp()); |
| |
| dragTarget->dispatchEvent(me.get()); |
| return me->defaultPrevented(); |
| } |
| |
| static bool targetIsFrame(Node* target, LocalFrame*& frame) |
| { |
| if (!isHTMLFrameElementBase(target)) |
| return false; |
| |
| // Cross-process drag and drop is not yet supported. |
| if (toHTMLFrameElementBase(target)->contentFrame() && !toHTMLFrameElementBase(target)->contentFrame()->isLocalFrame()) |
| return false; |
| |
| frame = toLocalFrame(toHTMLFrameElementBase(target)->contentFrame()); |
| return true; |
| } |
| |
| static bool findDropZone(Node* target, DataTransfer* dataTransfer) |
| { |
| Element* element = target->isElementNode() ? toElement(target) : target->parentElement(); |
| for (; element; element = element->parentElement()) { |
| bool matched = false; |
| AtomicString dropZoneStr = element->fastGetAttribute(webkitdropzoneAttr); |
| |
| if (dropZoneStr.isEmpty()) |
| continue; |
| |
| UseCounter::count(element->document(), UseCounter::PrefixedHTMLElementDropzone); |
| |
| dropZoneStr = dropZoneStr.lower(); |
| |
| SpaceSplitString keywords(dropZoneStr, SpaceSplitString::ShouldNotFoldCase); |
| if (keywords.isNull()) |
| continue; |
| |
| DragOperation dragOperation = DragOperationNone; |
| for (unsigned i = 0; i < keywords.size(); i++) { |
| DragOperation op = convertDropZoneOperationToDragOperation(keywords[i]); |
| if (op != DragOperationNone) { |
| if (dragOperation == DragOperationNone) |
| dragOperation = op; |
| } else { |
| matched = matched || dataTransfer->hasDropZoneType(keywords[i].string()); |
| } |
| |
| if (matched && dragOperation != DragOperationNone) |
| break; |
| } |
| if (matched) { |
| dataTransfer->setDropEffect(convertDragOperationToDropZoneOperation(dragOperation)); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| bool EventHandler::updateDragAndDrop(const PlatformMouseEvent& event, DataTransfer* dataTransfer) |
| { |
| bool accept = false; |
| |
| if (!m_frame->view()) |
| return false; |
| |
| HitTestRequest request(HitTestRequest::ReadOnly); |
| MouseEventWithHitTestResults mev = prepareMouseEvent(request, event); |
| |
| // Drag events should never go to text nodes (following IE, and proper mouseover/out dispatch) |
| RefPtrWillBeRawPtr<Node> newTarget = mev.innerNode(); |
| if (newTarget && newTarget->isTextNode()) |
| newTarget = ComposedTreeTraversal::parent(*newTarget); |
| |
| if (AutoscrollController* controller = autoscrollController()) |
| controller->updateDragAndDrop(newTarget.get(), event.position(), event.timestamp()); |
| |
| if (m_dragTarget != newTarget) { |
| // FIXME: this ordering was explicitly chosen to match WinIE. However, |
| // it is sometimes incorrect when dragging within subframes, as seen with |
| // LayoutTests/fast/events/drag-in-frames.html. |
| // |
| // Moreover, this ordering conforms to section 7.9.4 of the HTML 5 spec. <http://dev.w3.org/html5/spec/Overview.html#drag-and-drop-processing-model>. |
| LocalFrame* targetFrame; |
| if (targetIsFrame(newTarget.get(), targetFrame)) { |
| if (targetFrame) |
| accept = targetFrame->eventHandler().updateDragAndDrop(event, dataTransfer); |
| } else if (newTarget) { |
| // As per section 7.9.4 of the HTML 5 spec., we must always fire a drag event before firing a dragenter, dragleave, or dragover event. |
| if (dragState().m_dragSrc) { |
| // for now we don't care if event handler cancels default behavior, since there is none |
| dispatchDragSrcEvent(EventTypeNames::drag, event); |
| } |
| accept = dispatchDragEvent(EventTypeNames::dragenter, newTarget.get(), event, dataTransfer); |
| if (!accept) |
| accept = findDropZone(newTarget.get(), dataTransfer); |
| } |
| |
| if (targetIsFrame(m_dragTarget.get(), targetFrame)) { |
| if (targetFrame) |
| accept = targetFrame->eventHandler().updateDragAndDrop(event, dataTransfer); |
| } else if (m_dragTarget) { |
| dispatchDragEvent(EventTypeNames::dragleave, m_dragTarget.get(), event, dataTransfer); |
| } |
| |
| if (newTarget) { |
| // We do not explicitly call dispatchDragEvent here because it could ultimately result in the appearance that |
| // two dragover events fired. So, we mark that we should only fire a dragover event on the next call to this function. |
| m_shouldOnlyFireDragOverEvent = true; |
| } |
| } else { |
| LocalFrame* targetFrame; |
| if (targetIsFrame(newTarget.get(), targetFrame)) { |
| if (targetFrame) |
| accept = targetFrame->eventHandler().updateDragAndDrop(event, dataTransfer); |
| } else if (newTarget) { |
| // Note, when dealing with sub-frames, we may need to fire only a dragover event as a drag event may have been fired earlier. |
| if (!m_shouldOnlyFireDragOverEvent && dragState().m_dragSrc) { |
| // for now we don't care if event handler cancels default behavior, since there is none |
| dispatchDragSrcEvent(EventTypeNames::drag, event); |
| } |
| accept = dispatchDragEvent(EventTypeNames::dragover, newTarget.get(), event, dataTransfer); |
| if (!accept) |
| accept = findDropZone(newTarget.get(), dataTransfer); |
| m_shouldOnlyFireDragOverEvent = false; |
| } |
| } |
| m_dragTarget = newTarget; |
| |
| return accept; |
| } |
| |
| void EventHandler::cancelDragAndDrop(const PlatformMouseEvent& event, DataTransfer* dataTransfer) |
| { |
| LocalFrame* targetFrame; |
| if (targetIsFrame(m_dragTarget.get(), targetFrame)) { |
| if (targetFrame) |
| targetFrame->eventHandler().cancelDragAndDrop(event, dataTransfer); |
| } else if (m_dragTarget.get()) { |
| if (dragState().m_dragSrc) |
| dispatchDragSrcEvent(EventTypeNames::drag, event); |
| dispatchDragEvent(EventTypeNames::dragleave, m_dragTarget.get(), event, dataTransfer); |
| } |
| clearDragState(); |
| } |
| |
| bool EventHandler::performDragAndDrop(const PlatformMouseEvent& event, DataTransfer* dataTransfer) |
| { |
| LocalFrame* targetFrame; |
| bool preventedDefault = false; |
| if (targetIsFrame(m_dragTarget.get(), targetFrame)) { |
| if (targetFrame) |
| preventedDefault = targetFrame->eventHandler().performDragAndDrop(event, dataTransfer); |
| } else if (m_dragTarget.get()) { |
| preventedDefault = dispatchDragEvent(EventTypeNames::drop, m_dragTarget.get(), event, dataTransfer); |
| } |
| clearDragState(); |
| return preventedDefault; |
| } |
| |
| void EventHandler::clearDragState() |
| { |
| stopAutoscroll(); |
| m_dragTarget = nullptr; |
| m_capturingMouseEventsNode = nullptr; |
| m_shouldOnlyFireDragOverEvent = false; |
| } |
| |
| void EventHandler::setCapturingMouseEventsNode(PassRefPtrWillBeRawPtr<Node> n) |
| { |
| m_capturingMouseEventsNode = n; |
| m_eventHandlerWillResetCapturingMouseEventsNode = false; |
| } |
| |
| MouseEventWithHitTestResults EventHandler::prepareMouseEvent(const HitTestRequest& request, const PlatformMouseEvent& mev) |
| { |
| ASSERT(m_frame); |
| ASSERT(m_frame->document()); |
| |
| return m_frame->document()->prepareMouseEvent(request, contentPointFromRootFrame(m_frame, mev.position()), mev); |
| } |
| |
| void EventHandler::updateMouseEventTargetNode(Node* targetNode, const PlatformMouseEvent& mouseEvent, bool fireMouseEvents) |
| { |
| Node* result = targetNode; |
| |
| // If we're capturing, we always go right to that node. |
| if (m_capturingMouseEventsNode) { |
| result = m_capturingMouseEventsNode.get(); |
| } else { |
| // If the target node is a text node, dispatch on the parent node - rdar://4196646 |
| if (result && result->isTextNode()) |
| result = ComposedTreeTraversal::parent(*result); |
| } |
| m_nodeUnderMouse = result; |
| |
| if (fireMouseEvents) { |
| DeprecatedPaintLayer* layerForLastNode = layerForNode(m_lastNodeUnderMouse.get()); |
| DeprecatedPaintLayer* layerForNodeUnderMouse = layerForNode(m_nodeUnderMouse.get()); |
| Page* page = m_frame->page(); |
| |
| if (m_lastNodeUnderMouse && (!m_nodeUnderMouse || m_nodeUnderMouse->document() != m_frame->document())) { |
| // The mouse has moved between frames. |
| if (LocalFrame* frame = m_lastNodeUnderMouse->document().frame()) { |
| if (FrameView* frameView = frame->view()) |
| frameView->mouseExitedContentArea(); |
| } |
| } else if (page && (layerForLastNode && (!layerForNodeUnderMouse || layerForNodeUnderMouse != layerForLastNode))) { |
| // The mouse has moved between layers. |
| if (ScrollableArea* scrollableAreaForLastNode = associatedScrollableArea(layerForLastNode)) |
| scrollableAreaForLastNode->mouseExitedContentArea(); |
| } |
| |
| if (m_nodeUnderMouse && (!m_lastNodeUnderMouse || m_lastNodeUnderMouse->document() != m_frame->document())) { |
| // The mouse has moved between frames. |
| if (LocalFrame* frame = m_nodeUnderMouse->document().frame()) { |
| if (FrameView* frameView = frame->view()) |
| frameView->mouseEnteredContentArea(); |
| } |
| } else if (page && (layerForNodeUnderMouse && (!layerForLastNode || layerForNodeUnderMouse != layerForLastNode))) { |
| // The mouse has moved between layers. |
| if (ScrollableArea* scrollableAreaForNodeUnderMouse = associatedScrollableArea(layerForNodeUnderMouse)) |
| scrollableAreaForNodeUnderMouse->mouseEnteredContentArea(); |
| } |
| |
| if (m_lastNodeUnderMouse && m_lastNodeUnderMouse->document() != m_frame->document()) { |
| m_lastNodeUnderMouse = nullptr; |
| m_lastScrollbarUnderMouse = nullptr; |
| } |
| |
| if (m_lastNodeUnderMouse != m_nodeUnderMouse) |
| sendMouseEventsForNodeTransition(m_lastNodeUnderMouse.get(), m_nodeUnderMouse.get(), mouseEvent); |
| |
| m_lastNodeUnderMouse = m_nodeUnderMouse; |
| } |
| } |
| |
| void EventHandler::sendMouseEventsForNodeTransition(Node* exitedNode, Node* enteredNode, const PlatformMouseEvent& mouseEvent) |
| { |
| ASSERT(exitedNode != enteredNode); |
| |
| // First, dispatch mouseout event (which bubbles to ancestors) |
| if (isNodeInDocument(exitedNode)) |
| exitedNode->dispatchMouseEvent(mouseEvent, EventTypeNames::mouseout, 0, enteredNode); |
| |
| // A note on mouseenter and mouseleave: These are non-bubbling events, and they are dispatched if there |
| // is a capturing event handler on an ancestor or a normal event handler on the element itself. This special |
| // handling is necessary to avoid O(n^2) capturing event handler checks. |
| // |
| // Note, however, that this optimization can possibly cause some unanswered/missing/redundant mouseenter or |
| // mouseleave events in certain contrived eventhandling scenarios, e.g., when: |
| // - the mouseleave handler for a node sets the only capturing-mouseleave-listener in its ancestor, or |
| // - DOM mods in any mouseenter/mouseleave handler changes the common ancestor of exited & entered nodes, etc. |
| // We think the spec specifies a "frozen" state to avoid such corner cases (check the discussion on "candidate event |
| // listeners" at http://www.w3.org/TR/uievents), but our code below preserves one such behavior from past only to |
| // match Firefox and IE behavior. |
| // |
| // TODO(mustaq): Confirm spec conformance, double-check with other browsers. |
| |
| // Create lists of all exited/entered ancestors. |
| WillBeHeapVector<RefPtrWillBeMember<Node>, 32> exitedAncestors; |
| WillBeHeapVector<RefPtrWillBeMember<Node>, 32> enteredAncestors; |
| if (isNodeInDocument(exitedNode)) { |
| exitedNode->updateDistribution(); |
| for (Node* node = exitedNode; node; node = ComposedTreeTraversal::parent(*node)) { |
| exitedAncestors.append(node); |
| } |
| } |
| if (isNodeInDocument(enteredNode)) { |
| enteredNode->updateDistribution(); |
| for (Node* node = enteredNode; node; node = ComposedTreeTraversal::parent(*node)) { |
| enteredAncestors.append(node); |
| } |
| } |
| |
| size_t numExitedAncestors = exitedAncestors.size(); |
| size_t numEnteredAncestors = enteredAncestors.size(); |
| |
| // Locate the common ancestor in the two lists. Start with the assumption that it's off both the lists. |
| size_t exitedAncestorIndex = numExitedAncestors; |
| size_t enteredAncestorIndex = numEnteredAncestors; |
| for (size_t j = 0; j < numExitedAncestors; j++) { |
| for (size_t i = 0; i < numEnteredAncestors; i++) { |
| if (exitedAncestors[j] == enteredAncestors[i]) { |
| exitedAncestorIndex = j; |
| enteredAncestorIndex = i; |
| break; |
| } |
| } |
| if (exitedAncestorIndex < numExitedAncestors) |
| break; |
| } |
| |
| // Determine if there is a capturing mouseleave listener in an ancestor. |
| bool exitedNodeHasCapturingAncestor = false; |
| for (size_t j = 0; j < numExitedAncestors; j++) { |
| if (exitedAncestors[j]->hasCapturingEventListeners(EventTypeNames::mouseleave)) |
| exitedNodeHasCapturingAncestor = true; |
| } |
| |
| // Send mouseleave events to appropriate exited ancestors, in child-to-parent order. |
| for (size_t j = 0; j < exitedAncestorIndex; j++) { |
| if (exitedNodeHasCapturingAncestor || exitedAncestors[j]->hasEventListeners(EventTypeNames::mouseleave)) |
| exitedAncestors[j]->dispatchMouseEvent(mouseEvent, EventTypeNames::mouseleave, 0, enteredNode); |
| } |
| |
| // Dispatch mouseover event (which bubbles to ancestors) after the mouseleave events are sent. |
| if (isNodeInDocument(enteredNode)) |
| enteredNode->dispatchMouseEvent(mouseEvent, EventTypeNames::mouseover, 0, exitedNode); |
| |
| // Determine if there is a capturing mouseenter listener in an ancestor. This must be done /after/ dispatching the |
| // mouseleave events because the handler for mouseleave might set a capturing mouseenter handler. |
| bool enteredNodeHasCapturingAncestor = false; |
| for (size_t i = 0; i < numEnteredAncestors; i++) { |
| if (enteredAncestors[i]->hasCapturingEventListeners(EventTypeNames::mouseenter)) |
| enteredNodeHasCapturingAncestor = true; |
| } |
| |
| // Send mouseenter events to appropriate entered ancestors, in parent-to-child order. |
| for (size_t i = enteredAncestorIndex; i > 0; i--) { |
| if (enteredNodeHasCapturingAncestor || enteredAncestors[i-1]->hasEventListeners(EventTypeNames::mouseenter)) |
| enteredAncestors[i-1]->dispatchMouseEvent(mouseEvent, EventTypeNames::mouseenter, 0, exitedNode); |
| } |
| } |
| |
| // The return value means 'continue default handling.' |
| // TODO(mustaq): setUnder needs a more informative name. |
| bool EventHandler::dispatchMouseEvent(const AtomicString& eventType, Node* targetNode, int clickCount, const PlatformMouseEvent& mouseEvent, bool setUnder) |
| { |
| updateMouseEventTargetNode(targetNode, mouseEvent, setUnder); |
| return !m_nodeUnderMouse || m_nodeUnderMouse->dispatchMouseEvent(mouseEvent, eventType, clickCount); |
| } |
| |
| // The return value means 'swallow event' (was handled), as for other handle* functions. |
| bool EventHandler::handleMouseFocus(const MouseEventWithHitTestResults& targetedEvent, InputDeviceCapabilities* sourceCapabilities) |
| { |
| const PlatformMouseEvent& mouseEvent = targetedEvent.event(); |
| |
| // If clicking on a frame scrollbar, do not mess up with content focus. |
| if (FrameView* view = m_frame->view()) { |
| if (view->scrollbarAtRootFramePoint(mouseEvent.position())) |
| return false; |
| } |
| |
| // The layout needs to be up to date to determine if an element is focusable. |
| m_frame->document()->updateLayoutIgnorePendingStylesheets(); |
| |
| Element* element = nullptr; |
| if (m_nodeUnderMouse) |
| element = m_nodeUnderMouse->isElementNode() ? toElement(m_nodeUnderMouse) : m_nodeUnderMouse->parentOrShadowHostElement(); |
| for (; element; element = element->parentOrShadowHostElement()) { |
| if (element->isFocusable() && element->isFocusedElementInDocument()) |
| return false; |
| if (element->isMouseFocusable()) |
| break; |
| } |
| ASSERT(!element || element->isMouseFocusable()); |
| |
| // To fix <rdar://problem/4895428> Can't drag selected ToDo, we don't focus |
| // a node on mouse down if it's selected and inside a focused node. It will |
| // be focused if the user does a mouseup over it, however, because the |
| // mouseup will set a selection inside it, which will call |
| // FrameSelection::setFocusedNodeIfNeeded. |
| if (element && m_frame->selection().isRange()) { |
| if (m_frame->selection().toNormalizedRange()->isNodeFullyContained(*element) |
| && element->isDescendantOf(m_frame->document()->focusedElement())) |
| return false; |
| } |
| |
| |
| // Only change the focus when clicking scrollbars if it can transfered to a |
| // mouse focusable node. |
| if (!element && targetedEvent.hitTestResult().scrollbar()) |
| return true; |
| |
| if (Page* page = m_frame->page()) { |
| // If focus shift is blocked, we eat the event. Note we should never |
| // clear swallowEvent if the page already set it (e.g., by canceling |
| // default behavior). |
| if (element) { |
| if (slideFocusOnShadowHostIfNecessary(*element)) |
| return true; |
| if (!page->focusController().setFocusedElement(element, m_frame, WebFocusTypeMouse, sourceCapabilities)) |
| return true; |
| } else { |
| // We call setFocusedElement even with !element in order to blur |
| // current focus element when a link is clicked; this is expected by |
| // some sites that rely on onChange handlers running from form |
| // fields before the button click is processed. |
| if (!page->focusController().setFocusedElement(0, m_frame, WebFocusTypeNone, sourceCapabilities)) |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| bool EventHandler::slideFocusOnShadowHostIfNecessary(const Element& element) |
| { |
| if (element.authorShadowRoot() && element.authorShadowRoot()->delegatesFocus()) { |
| Document* doc = m_frame->document(); |
| if (element.containsIncludingShadowDOM(doc->focusedElement())) { |
| // If the inner element is already focused, do nothing. |
| return true; |
| } |
| |
| // If the host has a focusable inner element, focus it. Otherwise, the host takes focus. |
| Page* page = m_frame->page(); |
| ASSERT(page); |
| Element* next = page->focusController().findFocusableElement(WebFocusTypeForward, *element.authorShadowRoot()); |
| if (next && element.containsIncludingShadowDOM(next)) { |
| // Use WebFocusTypeForward instead of WebFocusTypeMouse here to mean the focus has slided. |
| next->focus(false, WebFocusTypeForward); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| bool EventHandler::handleWheelEvent(const PlatformWheelEvent& event) |
| { |
| #define RETURN_WHEEL_EVENT_HANDLED() \ |
| { \ |
| setFrameWasScrolledByUser(); \ |
| return true; \ |
| } |
| |
| Document* doc = m_frame->document(); |
| |
| if (!doc->layoutView()) |
| return false; |
| |
| RefPtrWillBeRawPtr<FrameView> protector(m_frame->view()); |
| |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return false; |
| |
| LayoutPoint vPoint = view->rootFrameToContents(event.position()); |
| |
| // Pass Active to ensure that hit-test result in current document if otherwise empty |
| // TODO(majidvp): Avoid using Active to trigger hit-testing fallback. See http://crbug.com/505825 |
| HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active); |
| HitTestResult result(request, vPoint); |
| doc->layoutView()->hitTest(result); |
| |
| Node* node = result.innerNode(); |
| // Wheel events should not dispatch to text nodes. |
| if (node && node->isTextNode()) |
| node = ComposedTreeTraversal::parent(*node); |
| |
| if (m_previousWheelScrolledNode) |
| m_previousWheelScrolledNode = nullptr; |
| |
| bool isOverWidget = result.isOverWidget(); |
| |
| if (node) { |
| // Figure out which view to send the event to. |
| LayoutObject* target = node->layoutObject(); |
| |
| if (isOverWidget && target && target->isLayoutPart()) { |
| Widget* widget = toLayoutPart(target)->widget(); |
| if (widget && passWheelEventToWidget(event, *widget)) |
| RETURN_WHEEL_EVENT_HANDLED(); |
| } |
| |
| if (node && !node->dispatchWheelEvent(event)) |
| RETURN_WHEEL_EVENT_HANDLED(); |
| } |
| |
| // We do another check on the frame view because the event handler can run |
| // JS which results in the frame getting destroyed. |
| view = m_frame->view(); |
| if (!view) |
| return false; |
| |
| ScrollResult scrollResult = view->scrollableArea()->handleWheel(event); |
| if (m_frame->settings() && m_frame->settings()->reportWheelOverscroll()) |
| handleOverscroll(scrollResult); |
| if (scrollResult.didScroll()) |
| RETURN_WHEEL_EVENT_HANDLED(); |
| |
| return false; |
| #undef RETURN_WHEEL_EVENT_HANDLED |
| } |
| |
| void EventHandler::defaultWheelEventHandler(Node* startNode, WheelEvent* wheelEvent) |
| { |
| if (!startNode || !wheelEvent) |
| return; |
| |
| // When the wheelEvent do not scroll, we trigger zoom in/out instead. |
| if (!wheelEvent->canScroll()) |
| return; |
| |
| Node* stopNode = m_previousWheelScrolledNode.get(); |
| ScrollGranularity granularity = wheelGranularityToScrollGranularity(wheelEvent); |
| IntPoint absolutePosition = roundedIntPoint(wheelEvent->absoluteLocation()); |
| |
| // Break up into two scrolls if we need to. Diagonal movement on |
| // a MacBook pro is an example of a 2-dimensional mouse wheel event (where both deltaX and deltaY can be set). |
| |
| // FIXME: enable scroll customization in this case. See crbug.com/410974. |
| if (wheelEvent->railsMode() != Event::RailsModeVertical |
| && scroll(ScrollRightIgnoringWritingMode, granularity, startNode, &stopNode, wheelEvent->deltaX(), absolutePosition).didScroll) |
| wheelEvent->setDefaultHandled(); |
| |
| if (wheelEvent->railsMode() != Event::RailsModeHorizontal |
| && scroll(ScrollDownIgnoringWritingMode, granularity, startNode, &stopNode, wheelEvent->deltaY(), absolutePosition).didScroll) |
| wheelEvent->setDefaultHandled(); |
| |
| m_previousWheelScrolledNode = stopNode; |
| } |
| |
| bool EventHandler::handleGestureShowPress() |
| { |
| m_lastShowPressTimestamp = WTF::currentTime(); |
| |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return false; |
| if (ScrollAnimator* scrollAnimator = view->existingScrollAnimator()) |
| scrollAnimator->cancelAnimations(); |
| const FrameView::ScrollableAreaSet* areas = view->scrollableAreas(); |
| if (!areas) |
| return false; |
| for (const ScrollableArea* scrollableArea : *areas) { |
| ScrollAnimator* animator = scrollableArea->existingScrollAnimator(); |
| if (animator) |
| animator->cancelAnimations(); |
| } |
| return false; |
| } |
| |
| bool EventHandler::handleGestureEvent(const PlatformGestureEvent& gestureEvent) |
| { |
| // Propagation to inner frames is handled below this function. |
| ASSERT(m_frame == m_frame->localFrameRoot()); |
| |
| // Scrolling-related gesture events invoke EventHandler recursively for each frame down |
| // the chain, doing a single-frame hit-test per frame. This matches handleWheelEvent. |
| // FIXME: Add a test that traverses this path, e.g. for devtools overlay. |
| if (gestureEvent.isScrollEvent()) |
| return handleGestureScrollEvent(gestureEvent); |
| |
| // Hit test across all frames and do touch adjustment as necessary for the event type. |
| GestureEventWithHitTestResults targetedEvent = targetGestureEvent(gestureEvent); |
| |
| return handleGestureEvent(targetedEvent); |
| } |
| |
| bool EventHandler::handleGestureEvent(const GestureEventWithHitTestResults& targetedEvent) |
| { |
| TRACE_EVENT0("input", "EventHandler::handleGestureEvent"); |
| |
| // Propagation to inner frames is handled below this function. |
| ASSERT(m_frame == m_frame->localFrameRoot()); |
| |
| // Non-scrolling related gesture events do a single cross-frame hit-test and jump |
| // directly to the inner most frame. This matches handleMousePressEvent etc. |
| ASSERT(!targetedEvent.event().isScrollEvent()); |
| |
| // update mouseout/leave/over/enter events before jumping directly to the inner most frame |
| if (targetedEvent.event().type() == PlatformEvent::GestureTap) |
| updateGestureTargetNodeForMouseEvent(targetedEvent); |
| |
| // Route to the correct frame. |
| if (LocalFrame* innerFrame = targetedEvent.hitTestResult().innerNodeFrame()) |
| return innerFrame->eventHandler().handleGestureEventInFrame(targetedEvent); |
| |
| // No hit test result, handle in root instance. Perhaps we should just return false instead? |
| return handleGestureEventInFrame(targetedEvent); |
| } |
| |
| bool EventHandler::handleGestureEventInFrame(const GestureEventWithHitTestResults& targetedEvent) |
| { |
| ASSERT(!targetedEvent.event().isScrollEvent()); |
| |
| RefPtrWillBeRawPtr<Node> eventTarget = targetedEvent.hitTestResult().innerNode(); |
| RefPtrWillBeRawPtr<Scrollbar> scrollbar = targetedEvent.hitTestResult().scrollbar(); |
| const PlatformGestureEvent& gestureEvent = targetedEvent.event(); |
| |
| if (scrollbar) { |
| bool eventSwallowed = scrollbar->gestureEvent(gestureEvent); |
| if (gestureEvent.type() == PlatformEvent::GestureTapDown && eventSwallowed) |
| m_scrollbarHandlingScrollGesture = scrollbar; |
| if (eventSwallowed) |
| return true; |
| } |
| |
| if (eventTarget && eventTarget->dispatchGestureEvent(gestureEvent)) |
| return true; |
| |
| switch (gestureEvent.type()) { |
| case PlatformEvent::GestureTap: |
| return handleGestureTap(targetedEvent); |
| case PlatformEvent::GestureShowPress: |
| return handleGestureShowPress(); |
| case PlatformEvent::GestureLongPress: |
| return handleGestureLongPress(targetedEvent); |
| case PlatformEvent::GestureLongTap: |
| return handleGestureLongTap(targetedEvent); |
| case PlatformEvent::GestureTwoFingerTap: |
| return sendContextMenuEventForGesture(targetedEvent); |
| case PlatformEvent::GestureTapDown: |
| case PlatformEvent::GesturePinchBegin: |
| case PlatformEvent::GesturePinchEnd: |
| case PlatformEvent::GesturePinchUpdate: |
| case PlatformEvent::GestureTapDownCancel: |
| case PlatformEvent::GestureTapUnconfirmed: |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| |
| return false; |
| } |
| |
| bool EventHandler::handleGestureScrollEvent(const PlatformGestureEvent& gestureEvent) |
| { |
| TRACE_EVENT0("input", "EventHandler::handleGestureScrollEvent"); |
| |
| RefPtrWillBeRawPtr<Node> eventTarget = nullptr; |
| RefPtrWillBeRawPtr<Scrollbar> scrollbar = nullptr; |
| if (gestureEvent.type() != PlatformEvent::GestureScrollBegin) { |
| scrollbar = m_scrollbarHandlingScrollGesture.get(); |
| eventTarget = m_scrollGestureHandlingNode.get(); |
| } |
| |
| if (!eventTarget) { |
| Document* document = m_frame->document(); |
| if (!document->layoutView()) |
| return false; |
| |
| FrameView* view = m_frame->view(); |
| LayoutPoint viewPoint = view->rootFrameToContents(gestureEvent.position()); |
| HitTestRequest request(HitTestRequest::ReadOnly); |
| HitTestResult result(request, viewPoint); |
| document->layoutView()->hitTest(result); |
| |
| eventTarget = result.innerNode(); |
| |
| m_lastGestureScrollOverWidget = result.isOverWidget(); |
| m_scrollGestureHandlingNode = eventTarget; |
| m_previousGestureScrolledNode = nullptr; |
| |
| if (!scrollbar) |
| scrollbar = result.scrollbar(); |
| } |
| |
| if (scrollbar) { |
| bool eventSwallowed = scrollbar->gestureEvent(gestureEvent); |
| if (gestureEvent.type() == PlatformEvent::GestureScrollEnd |
| || gestureEvent.type() == PlatformEvent::GestureFlingStart |
| || !eventSwallowed) { |
| m_scrollbarHandlingScrollGesture = nullptr; |
| } |
| if (eventSwallowed) |
| return true; |
| } |
| |
| if (eventTarget) { |
| bool eventSwallowed = handleScrollGestureOnResizer(eventTarget.get(), gestureEvent); |
| if (!eventSwallowed) |
| eventSwallowed = eventTarget->dispatchGestureEvent(gestureEvent); |
| if (eventSwallowed) |
| return true; |
| } |
| |
| switch (gestureEvent.type()) { |
| case PlatformEvent::GestureScrollBegin: |
| return handleGestureScrollBegin(gestureEvent); |
| case PlatformEvent::GestureScrollUpdate: |
| return handleGestureScrollUpdate(gestureEvent); |
| case PlatformEvent::GestureScrollEnd: |
| return handleGestureScrollEnd(gestureEvent); |
| case PlatformEvent::GestureFlingStart: |
| case PlatformEvent::GesturePinchBegin: |
| case PlatformEvent::GesturePinchEnd: |
| case PlatformEvent::GesturePinchUpdate: |
| return false; |
| default: |
| ASSERT_NOT_REACHED(); |
| return false; |
| } |
| } |
| |
| bool EventHandler::handleGestureTap(const GestureEventWithHitTestResults& targetedEvent) |
| { |
| RefPtrWillBeRawPtr<FrameView> frameView(m_frame->view()); |
| const PlatformGestureEvent& gestureEvent = targetedEvent.event(); |
| HitTestRequest::HitTestRequestType hitType = getHitTypeForGestureType(gestureEvent.type()); |
| uint64_t preDispatchDomTreeVersion = m_frame->document()->domTreeVersion(); |
| uint64_t preDispatchStyleVersion = m_frame->document()->styleVersion(); |
| |
| UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture); |
| |
| HitTestResult currentHitTest = targetedEvent.hitTestResult(); |
| |
| // We use the adjusted position so the application isn't surprised to see a event with |
| // co-ordinates outside the target's bounds. |
| IntPoint adjustedPoint = frameView->rootFrameToContents(gestureEvent.position()); |
| |
| unsigned modifiers = gestureEvent.modifiers(); |
| PlatformMouseEvent fakeMouseMove(gestureEvent.position(), gestureEvent.globalPosition(), |
| NoButton, PlatformEvent::MouseMoved, /* clickCount */ 0, |
| static_cast<PlatformEvent::Modifiers>(modifiers), |
| PlatformMouseEvent::FromTouch, gestureEvent.timestamp()); |
| dispatchMouseEvent(EventTypeNames::mousemove, currentHitTest.innerNode(), 0, fakeMouseMove, true); |
| |
| // Do a new hit-test in case the mousemove event changed the DOM. |
| // Note that if the original hit test wasn't over an element (eg. was over a scrollbar) we |
| // don't want to re-hit-test because it may be in the wrong frame (and there's no way the page |
| // could have seen the event anyway). |
| // Also note that the position of the frame may have changed, so we need to recompute the content |
| // co-ordinates (updating layout/style as hitTestResultAtPoint normally would). |
| // FIXME: Use a hit-test cache to avoid unnecessary hit tests. http://crbug.com/398920 |
| if (currentHitTest.innerNode()) { |
| LocalFrame* mainFrame = m_frame->localFrameRoot(); |
| if (mainFrame && mainFrame->view()) |
| mainFrame->view()->updateAllLifecyclePhases(); |
| adjustedPoint = frameView->rootFrameToContents(gestureEvent.position()); |
| currentHitTest = hitTestResultInFrame(m_frame, adjustedPoint, hitType); |
| } |
| m_clickNode = currentHitTest.innerNode(); |
| |
| // Capture data for showUnhandledTapUIIfNeeded. |
| RefPtrWillBeRawPtr<Node> tappedNode = m_clickNode; |
| IntPoint tappedPosition = gestureEvent.position(); |
| |
| if (m_clickNode && m_clickNode->isTextNode()) |
| m_clickNode = ComposedTreeTraversal::parent(*m_clickNode); |
| |
| PlatformMouseEvent fakeMouseDown(gestureEvent.position(), gestureEvent.globalPosition(), |
| LeftButton, PlatformEvent::MousePressed, gestureEvent.tapCount(), |
| static_cast<PlatformEvent::Modifiers>(modifiers | PlatformEvent::LeftButtonDown), |
| PlatformMouseEvent::FromTouch, gestureEvent.timestamp()); |
| bool swallowMouseDownEvent = !dispatchMouseEvent(EventTypeNames::mousedown, currentHitTest.innerNode(), gestureEvent.tapCount(), fakeMouseDown, true); |
| selectionController().initializeSelectionState(); |
| if (!swallowMouseDownEvent) |
| swallowMouseDownEvent = handleMouseFocus(MouseEventWithHitTestResults(fakeMouseDown, currentHitTest), InputDeviceCapabilities::firesTouchEventsSourceCapabilities()); |
| if (!swallowMouseDownEvent) |
| swallowMouseDownEvent = handleMousePressEvent(MouseEventWithHitTestResults(fakeMouseDown, currentHitTest)); |
| |
| if (currentHitTest.innerNode()) { |
| ASSERT(gestureEvent.type() == PlatformEvent::GestureTap); |
| HitTestResult result = currentHitTest; |
| result.setToShadowHostIfInUserAgentShadowRoot(); |
| m_frame->chromeClient().onMouseDown(result.innerNode()); |
| } |
| |
| // FIXME: Use a hit-test cache to avoid unnecessary hit tests. http://crbug.com/398920 |
| if (currentHitTest.innerNode()) { |
| LocalFrame* mainFrame = m_frame->localFrameRoot(); |
| if (mainFrame && mainFrame->view()) |
| mainFrame->view()->updateAllLifecyclePhases(); |
| adjustedPoint = frameView->rootFrameToContents(gestureEvent.position()); |
| currentHitTest = hitTestResultInFrame(m_frame, adjustedPoint, hitType); |
| } |
| PlatformMouseEvent fakeMouseUp(gestureEvent.position(), gestureEvent.globalPosition(), |
| LeftButton, PlatformEvent::MouseReleased, gestureEvent.tapCount(), |
| static_cast<PlatformEvent::Modifiers>(modifiers), |
| PlatformMouseEvent::FromTouch, gestureEvent.timestamp()); |
| bool swallowMouseUpEvent = !dispatchMouseEvent(EventTypeNames::mouseup, currentHitTest.innerNode(), gestureEvent.tapCount(), fakeMouseUp, false); |
| |
| bool swallowClickEvent = false; |
| if (m_clickNode) { |
| if (currentHitTest.innerNode()) { |
| // Updates distribution because a mouseup (or mousedown) event listener can make the |
| // tree dirty at dispatchMouseEvent() invocation above. |
| // Unless distribution is updated, commonAncestor would hit ASSERT. |
| // Both m_clickNode and currentHitTest.innerNode()) don't need to be updated |
| // because commonAncestor() will exit early if their documents are different. |
| m_clickNode->updateDistribution(); |
| Node* clickTargetNode = currentHitTest.innerNode()->commonAncestor(*m_clickNode, parentForClickEvent); |
| swallowClickEvent = !dispatchMouseEvent(EventTypeNames::click, clickTargetNode, gestureEvent.tapCount(), fakeMouseUp, true); |
| } |
| m_clickNode = nullptr; |
| } |
| |
| if (!swallowMouseUpEvent) |
| swallowMouseUpEvent = handleMouseReleaseEvent(MouseEventWithHitTestResults(fakeMouseUp, currentHitTest)); |
| |
| bool swallowed = swallowMouseDownEvent | swallowMouseUpEvent | swallowClickEvent; |
| if (!swallowed && tappedNode && m_frame->page()) { |
| bool domTreeChanged = preDispatchDomTreeVersion != m_frame->document()->domTreeVersion(); |
| bool styleChanged = preDispatchStyleVersion != m_frame->document()->styleVersion(); |
| |
| IntPoint tappedPositionInViewport = m_frame->page()->frameHost().visualViewport().rootFrameToViewport(tappedPosition); |
| m_frame->chromeClient().showUnhandledTapUIIfNeeded(tappedPositionInViewport, tappedNode.get(), domTreeChanged || styleChanged); |
| } |
| return swallowed; |
| } |
| |
| bool EventHandler::handleGestureLongPress(const GestureEventWithHitTestResults& targetedEvent) |
| { |
| const PlatformGestureEvent& gestureEvent = targetedEvent.event(); |
| IntPoint adjustedPoint = gestureEvent.position(); |
| |
| unsigned modifiers = gestureEvent.modifiers(); |
| |
| // FIXME: Ideally we should try to remove the extra mouse-specific hit-tests here (re-using the |
| // supplied HitTestResult), but that will require some overhaul of the touch drag-and-drop code |
| // and LongPress is such a special scenario that it's unlikely to matter much in practice. |
| |
| m_longTapShouldInvokeContextMenu = false; |
| if (m_frame->settings() && m_frame->settings()->touchDragDropEnabled() && m_frame->view()) { |
| PlatformMouseEvent mouseDownEvent(adjustedPoint, gestureEvent.globalPosition(), LeftButton, PlatformEvent::MousePressed, 1, |
| static_cast<PlatformEvent::Modifiers>(modifiers | PlatformEvent::LeftButtonDown), |
| PlatformMouseEvent::FromTouch, WTF::currentTime()); |
| m_mouseDown = mouseDownEvent; |
| |
| PlatformMouseEvent mouseDragEvent(adjustedPoint, gestureEvent.globalPosition(), LeftButton, PlatformEvent::MouseMoved, 1, |
| static_cast<PlatformEvent::Modifiers>(modifiers | PlatformEvent::LeftButtonDown), |
| PlatformMouseEvent::FromTouch, WTF::currentTime()); |
| HitTestRequest request(HitTestRequest::ReadOnly); |
| MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseDragEvent); |
| m_mouseDownMayStartDrag = true; |
| dragState().m_dragSrc = nullptr; |
| m_mouseDownPos = m_frame->view()->rootFrameToContents(mouseDragEvent.position()); |
| RefPtrWillBeRawPtr<FrameView> protector(m_frame->view()); |
| if (handleDrag(mev, DragInitiator::Touch)) { |
| m_longTapShouldInvokeContextMenu = true; |
| return true; |
| } |
| } |
| |
| IntPoint hitTestPoint = m_frame->view()->rootFrameToContents(gestureEvent.position()); |
| HitTestResult result = hitTestResultAtPoint(hitTestPoint); |
| if (selectionController().handleGestureLongPress(gestureEvent, result)) { |
| focusDocumentView(); |
| return true; |
| } |
| |
| return sendContextMenuEventForGesture(targetedEvent); |
| } |
| |
| bool EventHandler::handleGestureLongTap(const GestureEventWithHitTestResults& targetedEvent) |
| { |
| #if !OS(ANDROID) |
| if (m_longTapShouldInvokeContextMenu) { |
| m_longTapShouldInvokeContextMenu = false; |
| return sendContextMenuEventForGesture(targetedEvent); |
| } |
| #endif |
| return false; |
| } |
| |
| bool EventHandler::handleScrollGestureOnResizer(Node* eventTarget, const PlatformGestureEvent& gestureEvent) |
| { |
| if (gestureEvent.type() == PlatformEvent::GestureScrollBegin) { |
| DeprecatedPaintLayer* layer = eventTarget->layoutObject() ? eventTarget->layoutObject()->enclosingLayer() : nullptr; |
| IntPoint p = m_frame->view()->rootFrameToContents(gestureEvent.position()); |
| if (layer && layer->scrollableArea() && layer->scrollableArea()->isPointInResizeControl(p, ResizerForTouch)) { |
| m_resizeScrollableArea = layer->scrollableArea(); |
| m_resizeScrollableArea->setInResizeMode(true); |
| m_offsetFromResizeCorner = LayoutSize(m_resizeScrollableArea->offsetFromResizeCorner(p)); |
| return true; |
| } |
| } else if (gestureEvent.type() == PlatformEvent::GestureScrollUpdate) { |
| if (m_resizeScrollableArea && m_resizeScrollableArea->inResizeMode()) { |
| m_resizeScrollableArea->resize(gestureEvent, m_offsetFromResizeCorner); |
| return true; |
| } |
| } else if (gestureEvent.type() == PlatformEvent::GestureScrollEnd) { |
| if (m_resizeScrollableArea && m_resizeScrollableArea->inResizeMode()) { |
| m_resizeScrollableArea->setInResizeMode(false); |
| m_resizeScrollableArea = nullptr; |
| return false; |
| } |
| } |
| |
| return false; |
| } |
| |
| bool EventHandler::passScrollGestureEventToWidget(const PlatformGestureEvent& gestureEvent, LayoutObject* layoutObject) |
| { |
| ASSERT(gestureEvent.isScrollEvent()); |
| |
| if (!m_lastGestureScrollOverWidget) |
| return false; |
| |
| if (!layoutObject || !layoutObject->isLayoutPart()) |
| return false; |
| |
| Widget* widget = toLayoutPart(layoutObject)->widget(); |
| |
| if (!widget || !widget->isFrameView()) |
| return false; |
| |
| return toFrameView(widget)->frame().eventHandler().handleGestureScrollEvent(gestureEvent); |
| } |
| |
| bool EventHandler::handleGestureScrollEnd(const PlatformGestureEvent& gestureEvent) |
| { |
| RefPtrWillBeRawPtr<Node> node = m_scrollGestureHandlingNode; |
| |
| if (node) { |
| passScrollGestureEventToWidget(gestureEvent, node->layoutObject()); |
| if (RuntimeEnabledFeatures::scrollCustomizationEnabled()) { |
| RefPtrWillBeRawPtr<ScrollState> scrollState = ScrollState::create( |
| 0, 0, 0, 0, 0, gestureEvent.inertial(), /* isBeginning */ |
| false, /* isEnding */ true, /* fromUserInput */ true); |
| customizedScroll(*node.get(), *scrollState); |
| } |
| } |
| |
| clearGestureScrollState(); |
| return false; |
| } |
| |
| bool EventHandler::handleGestureScrollBegin(const PlatformGestureEvent& gestureEvent) |
| { |
| Document* document = m_frame->document(); |
| if (!document->layoutView()) |
| return false; |
| |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return false; |
| |
| // If there's no layoutObject on the node, send the event to the nearest ancestor with a layoutObject. |
| // Needed for <option> and <optgroup> elements so we can touch scroll <select>s |
| while (m_scrollGestureHandlingNode && !m_scrollGestureHandlingNode->layoutObject()) |
| m_scrollGestureHandlingNode = m_scrollGestureHandlingNode->parentOrShadowHostNode(); |
| |
| if (!m_scrollGestureHandlingNode) { |
| if (RuntimeEnabledFeatures::scrollCustomizationEnabled()) |
| m_scrollGestureHandlingNode = m_frame->document()->documentElement(); |
| else |
| return false; |
| } |
| ASSERT(m_scrollGestureHandlingNode); |
| |
| passScrollGestureEventToWidget(gestureEvent, m_scrollGestureHandlingNode->layoutObject()); |
| if (RuntimeEnabledFeatures::scrollCustomizationEnabled()) { |
| m_currentScrollChain.clear(); |
| RefPtrWillBeRawPtr<ScrollState> scrollState = ScrollState::create( |
| 0, 0, 0, 0, 0, /* inInertialPhase */ false, /* isBeginning */ |
| true, /* isEnding */ false, /* fromUserInput */ true); |
| customizedScroll(*m_scrollGestureHandlingNode.get(), *scrollState); |
| } else { |
| if (m_frame->isMainFrame()) |
| m_frame->host()->topControls().scrollBegin(); |
| } |
| return true; |
| } |
| |
| void EventHandler::resetOverscroll(bool didScrollX, bool didScrollY) |
| { |
| if (didScrollX) |
| m_accumulatedRootOverscroll.setWidth(0); |
| if (didScrollY) |
| m_accumulatedRootOverscroll.setHeight(0); |
| } |
| |
| static inline FloatSize adjustOverscoll(FloatSize unusedDelta) |
| { |
| if (std::abs(unusedDelta.width()) < minimumOverscrollDelta) |
| unusedDelta.setWidth(0); |
| if (std::abs(unusedDelta.height()) < minimumOverscrollDelta) |
| unusedDelta.setHeight(0); |
| |
| return unusedDelta; |
| } |
| |
| void EventHandler::handleOverscroll(const ScrollResult& scrollResult, const FloatPoint& position, const FloatSize& velocity) |
| { |
| FloatSize unusedDelta(scrollResult.unusedScrollDeltaX, scrollResult.unusedScrollDeltaY); |
| unusedDelta = adjustOverscoll(unusedDelta); |
| resetOverscroll(scrollResult.didScrollX, scrollResult.didScrollY); |
| if (unusedDelta != FloatSize()) { |
| m_accumulatedRootOverscroll += unusedDelta; |
| m_frame->chromeClient().didOverscroll(unusedDelta, m_accumulatedRootOverscroll, position, velocity); |
| } |
| } |
| |
| bool EventHandler::handleGestureScrollUpdate(const PlatformGestureEvent& gestureEvent) |
| { |
| ASSERT(gestureEvent.type() == PlatformEvent::GestureScrollUpdate); |
| |
| FloatSize delta(gestureEvent.deltaX(), gestureEvent.deltaY()); |
| if (delta.isZero()) |
| return false; |
| |
| Node* node = m_scrollGestureHandlingNode.get(); |
| if (node) { |
| LayoutObject* layoutObject = node->layoutObject(); |
| if (!layoutObject) |
| return false; |
| |
| RefPtrWillBeRawPtr<FrameView> protector(m_frame->view()); |
| |
| Node* stopNode = nullptr; |
| |
| // Try to send the event to the correct view. |
| if (passScrollGestureEventToWidget(gestureEvent, layoutObject)) { |
| if (gestureEvent.preventPropagation() |
| && !RuntimeEnabledFeatures::scrollCustomizationEnabled()) { |
| // This is an optimization which doesn't apply with |
| // scroll customization enabled. |
| m_previousGestureScrolledNode = m_scrollGestureHandlingNode; |
| } |
| // FIXME: we should allow simultaneous scrolling of nested |
| // iframes along perpendicular axes. See crbug.com/466991. |
| m_deltaConsumedForScrollSequence = true; |
| return true; |
| } |
| |
| bool scrolled = false; |
| if (RuntimeEnabledFeatures::scrollCustomizationEnabled()) { |
| RefPtrWillBeRawPtr<ScrollState> scrollState = ScrollState::create( |
| gestureEvent.deltaX(), gestureEvent.deltaY(), |
| 0, gestureEvent.velocityX(), gestureEvent.velocityY(), |
| gestureEvent.inertial(), /* isBeginning */ |
| false, /* isEnding */ false, /* fromUserInput */ true, |
| !gestureEvent.preventPropagation(), m_deltaConsumedForScrollSequence); |
| if (m_previousGestureScrolledNode) { |
| // The ScrollState needs to know what the current |
| // native scrolling element is, so that for an |
| // inertial scroll that shouldn't propagate, only the |
| // currently scrolling element responds. |
| ASSERT(m_previousGestureScrolledNode->isElementNode()); |
| scrollState->setCurrentNativeScrollingElement(toElement(m_previousGestureScrolledNode.get())); |
| } |
| customizedScroll(*node, *scrollState); |
| m_previousGestureScrolledNode = scrollState->currentNativeScrollingElement(); |
| m_deltaConsumedForScrollSequence = scrollState->deltaConsumedForScrollSequence(); |
| scrolled = scrollState->deltaX() != gestureEvent.deltaX() |
| || scrollState->deltaY() != gestureEvent.deltaY(); |
| } else { |
| if (gestureEvent.preventPropagation()) |
| stopNode = m_previousGestureScrolledNode.get(); |
| |
| // First try to scroll the closest scrollable LayoutBox ancestor of |node|. |
| ScrollGranularity granularity = ScrollByPrecisePixel; |
| ScrollResultOneDimensional result = scroll(ScrollLeftIgnoringWritingMode, granularity, node, &stopNode, delta.width()); |
| bool horizontalScroll = result.didScroll; |
| if (!gestureEvent.preventPropagation()) |
| stopNode = nullptr; |
| result = scroll(ScrollUpIgnoringWritingMode, granularity, node, &stopNode, delta.height()); |
| bool verticalScroll = result.didScroll; |
| scrolled = horizontalScroll || verticalScroll; |
| |
| if (gestureEvent.preventPropagation()) |
| m_previousGestureScrolledNode = stopNode; |
| |
| resetOverscroll(horizontalScroll, verticalScroll); |
| } |
| if (scrolled) { |
| setFrameWasScrolledByUser(); |
| return true; |
| } |
| } |
| |
| if (RuntimeEnabledFeatures::scrollCustomizationEnabled()) |
| return false; |
| |
| // Try to scroll the frame view. |
| ScrollResult scrollResult = m_frame->applyScrollDelta(delta, false); |
| FloatPoint position = FloatPoint(gestureEvent.position().x(), gestureEvent.position().y()); |
| FloatSize velocity = FloatSize(gestureEvent.velocityX(), gestureEvent.velocityY()); |
| handleOverscroll(scrollResult, position, velocity); |
| if (scrollResult.didScroll()) { |
| setFrameWasScrolledByUser(); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| void EventHandler::clearGestureScrollState() |
| { |
| m_scrollGestureHandlingNode = nullptr; |
| m_previousGestureScrolledNode = nullptr; |
| m_deltaConsumedForScrollSequence = false; |
| m_currentScrollChain.clear(); |
| m_accumulatedRootOverscroll = FloatSize(); |
| } |
| |
| bool EventHandler::isScrollbarHandlingGestures() const |
| { |
| return m_scrollbarHandlingScrollGesture.get(); |
| } |
| |
| bool EventHandler::shouldApplyTouchAdjustment(const PlatformGestureEvent& event) const |
| { |
| if (m_frame->settings() && !m_frame->settings()->touchAdjustmentEnabled()) |
| return false; |
| return !event.area().isEmpty(); |
| } |
| |
| bool EventHandler::bestClickableNodeForHitTestResult(const HitTestResult& result, IntPoint& targetPoint, Node*& targetNode) |
| { |
| // FIXME: Unify this with the other best* functions which are very similar. |
| |
| TRACE_EVENT0("input", "EventHandler::bestClickableNodeForHitTestResult"); |
| ASSERT(result.isRectBasedTest()); |
| |
| // If the touch is over a scrollbar, don't adjust the touch point since touch adjustment only takes into account |
| // DOM nodes so a touch over a scrollbar will be adjusted towards nearby nodes. This leads to things like textarea |
| // scrollbars being untouchable. |
| if (result.scrollbar()) { |
| targetNode = 0; |
| return false; |
| } |
| |
| IntPoint touchCenter = m_frame->view()->contentsToRootFrame(result.roundedPointInMainFrame()); |
| IntRect touchRect = m_frame->view()->contentsToRootFrame(result.hitTestLocation().boundingBox()); |
| |
| WillBeHeapVector<RefPtrWillBeMember<Node>, 11> nodes; |
| copyToVector(result.listBasedTestResult(), nodes); |
| |
| // FIXME: the explicit Vector conversion copies into a temporary and is wasteful. |
| return findBestClickableCandidate(targetNode, targetPoint, touchCenter, touchRect, WillBeHeapVector<RefPtrWillBeMember<Node>> (nodes)); |
| } |
| |
| bool EventHandler::bestContextMenuNodeForHitTestResult(const HitTestResult& result, IntPoint& targetPoint, Node*& targetNode) |
| { |
| ASSERT(result.isRectBasedTest()); |
| IntPoint touchCenter = m_frame->view()->contentsToRootFrame(result.roundedPointInMainFrame()); |
| IntRect touchRect = m_frame->view()->contentsToRootFrame(result.hitTestLocation().boundingBox()); |
| WillBeHeapVector<RefPtrWillBeMember<Node>, 11> nodes; |
| copyToVector(result.listBasedTestResult(), nodes); |
| |
| // FIXME: the explicit Vector conversion copies into a temporary and is wasteful. |
| return findBestContextMenuCandidate(targetNode, targetPoint, touchCenter, touchRect, WillBeHeapVector<RefPtrWillBeMember<Node>>(nodes)); |
| } |
| |
| bool EventHandler::bestZoomableAreaForTouchPoint(const IntPoint& touchCenter, const IntSize& touchRadius, IntRect& targetArea, Node*& targetNode) |
| { |
| if (touchRadius.isEmpty()) |
| return false; |
| |
| IntPoint hitTestPoint = m_frame->view()->rootFrameToContents(touchCenter); |
| |
| HitTestRequest::HitTestRequestType hitType = HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::ListBased; |
| HitTestResult result = hitTestResultAtPoint(hitTestPoint, hitType, LayoutSize(touchRadius)); |
| |
| IntRect touchRect(touchCenter - touchRadius, touchRadius + touchRadius); |
| WillBeHeapVector<RefPtrWillBeMember<Node>, 11> nodes; |
| copyToVector(result.listBasedTestResult(), nodes); |
| |
| // FIXME: the explicit Vector conversion copies into a temporary and is wasteful. |
| return findBestZoomableArea(targetNode, targetArea, touchCenter, touchRect, WillBeHeapVector<RefPtrWillBeMember<Node>>(nodes)); |
| } |
| |
| // Update the hover and active state across all frames for this gesture. |
| // This logic is different than the mouse case because mice send MouseLeave events to frames as they're exited. |
| // With gestures, a single event conceptually both 'leaves' whatever frame currently had hover and enters a new frame |
| void EventHandler::updateGestureHoverActiveState(const HitTestRequest& request, Element* innerElement) |
| { |
| ASSERT(m_frame == m_frame->localFrameRoot()); |
| |
| WillBeHeapVector<LocalFrame*> newHoverFrameChain; |
| LocalFrame* newHoverFrameInDocument = innerElement ? innerElement->document().frame() : nullptr; |
| // Insert the ancestors of the frame having the new hovered node to the frame chain |
| // The frame chain doesn't include the main frame to avoid the redundant work that cleans the hover state. |
| // Because the hover state for the main frame is updated by calling Document::updateHoverActiveState |
| while (newHoverFrameInDocument && newHoverFrameInDocument != m_frame) { |
| newHoverFrameChain.append(newHoverFrameInDocument); |
| Frame* parentFrame = newHoverFrameInDocument->tree().parent(); |
| newHoverFrameInDocument = parentFrame && parentFrame->isLocalFrame() ? toLocalFrame(parentFrame) : nullptr; |
| } |
| |
| RefPtrWillBeRawPtr<Node> oldHoverNodeInCurDoc = m_frame->document()->hoverNode(); |
| RefPtrWillBeRawPtr<Node> newInnermostHoverNode = innerElement; |
| |
| if (newInnermostHoverNode != oldHoverNodeInCurDoc) { |
| size_t indexFrameChain = newHoverFrameChain.size(); |
| |
| // Clear the hover state on any frames which are no longer in the frame chain of the hovered elemen |
| while (oldHoverNodeInCurDoc && oldHoverNodeInCurDoc->isFrameOwnerElement()) { |
| LocalFrame* newHoverFrame = nullptr; |
| // If we can't get the frame from the new hover frame chain, |
| // the newHoverFrame will be null and the old hover state will be cleared. |
| if (indexFrameChain > 0) |
| newHoverFrame = newHoverFrameChain[--indexFrameChain]; |
| |
| HTMLFrameOwnerElement* owner = toHTMLFrameOwnerElement(oldHoverNodeInCurDoc.get()); |
| if (!owner->contentFrame() || !owner->contentFrame()->isLocalFrame()) |
| break; |
| |
| LocalFrame* oldHoverFrame = toLocalFrame(owner->contentFrame()); |
| Document* doc = oldHoverFrame->document(); |
| if (!doc) |
| break; |
| |
| oldHoverNodeInCurDoc = doc->hoverNode(); |
| // If the old hovered frame is different from the new hovered frame. |
| // we should clear the old hovered node from the old hovered frame. |
| if (newHoverFrame != oldHoverFrame) |
| doc->updateHoverActiveState(request, nullptr); |
| } |
| } |
| |
| // Recursively set the new active/hover states on every frame in the chain of innerElement. |
| m_frame->document()->updateHoverActiveState(request, innerElement); |
| } |
| |
| // Update the mouseover/mouseenter/mouseout/mouseleave events across all frames for this gesture, |
| // before passing the targeted gesture event directly to a hit frame. |
| void EventHandler::updateGestureTargetNodeForMouseEvent(const GestureEventWithHitTestResults& targetedEvent) |
| { |
| ASSERT(m_frame == m_frame->localFrameRoot()); |
| |
| // Behaviour of this function is as follows: |
| // - Create the chain of all entered frames. |
| // - Compare the last frame chain under the gesture to newly entered frame chain from the main frame one by one. |
| // - If the last frame doesn't match with the entered frame, then create the chain of exited frames from the last frame chain. |
| // - Dispatch mouseout/mouseleave events of the exited frames from the inside out. |
| // - Dispatch mouseover/mouseenter events of the entered frames into the inside. |
| |
| // Insert the ancestors of the frame having the new target node to the entered frame chain |
| WillBeHeapVector<LocalFrame*> enteredFrameChain; |
| LocalFrame* enteredFrameInDocument = targetedEvent.hitTestResult().innerNodeFrame(); |
| while (enteredFrameInDocument) { |
| enteredFrameChain.append(enteredFrameInDocument); |
| Frame* parentFrame = enteredFrameInDocument->tree().parent(); |
| enteredFrameInDocument = parentFrame && parentFrame->isLocalFrame() ? toLocalFrame(parentFrame) : nullptr; |
| } |
| |
| size_t indexEnteredFrameChain = enteredFrameChain.size(); |
| LocalFrame* exitedFrameInDocument = m_frame; |
| WillBeHeapVector<LocalFrame*> exitedFrameChain; |
| // Insert the frame from the disagreement between last frames and entered frames |
| while (exitedFrameInDocument) { |
| Node* lastNodeUnderTap = exitedFrameInDocument->eventHandler().m_lastNodeUnderMouse.get(); |
| if (!lastNodeUnderTap) |
| break; |
| |
| LocalFrame* nextExitedFrameInDocument = nullptr; |
| if (lastNodeUnderTap->isFrameOwnerElement()) { |
| HTMLFrameOwnerElement* owner = toHTMLFrameOwnerElement(lastNodeUnderTap); |
| if (owner->contentFrame() && owner->contentFrame()->isLocalFrame()) |
| nextExitedFrameInDocument = toLocalFrame(owner->contentFrame()); |
| } |
| |
| if (exitedFrameChain.size() > 0) { |
| exitedFrameChain.append(exitedFrameInDocument); |
| } else { |
| LocalFrame* lastEnteredFrameInDocument = indexEnteredFrameChain ? enteredFrameChain[indexEnteredFrameChain-1] : nullptr; |
| if (exitedFrameInDocument != lastEnteredFrameInDocument) |
| exitedFrameChain.append(exitedFrameInDocument); |
| else if (nextExitedFrameInDocument && indexEnteredFrameChain) |
| --indexEnteredFrameChain; |
| } |
| exitedFrameInDocument = nextExitedFrameInDocument; |
| } |
| |
| const PlatformGestureEvent& gestureEvent = targetedEvent.event(); |
| unsigned modifiers = gestureEvent.modifiers(); |
| PlatformMouseEvent fakeMouseMove(gestureEvent.position(), gestureEvent.globalPosition(), |
| NoButton, PlatformEvent::MouseMoved, /* clickCount */ 0, |
| static_cast<PlatformEvent::Modifiers>(modifiers), |
| PlatformMouseEvent::FromTouch, gestureEvent.timestamp()); |
| |
| // Update the mouseout/mouseleave event |
| size_t indexExitedFrameChain = exitedFrameChain.size(); |
| while (indexExitedFrameChain) { |
| LocalFrame* leaveFrame = exitedFrameChain[--indexExitedFrameChain]; |
| leaveFrame->eventHandler().updateMouseEventTargetNode(nullptr, fakeMouseMove, true); |
| } |
| |
| // update the mouseover/mouseenter event |
| while (indexEnteredFrameChain) { |
| Frame* parentFrame = enteredFrameChain[--indexEnteredFrameChain]->tree().parent(); |
| if (parentFrame && parentFrame->isLocalFrame()) |
| toLocalFrame(parentFrame)->eventHandler().updateMouseEventTargetNode(toHTMLFrameOwnerElement(enteredFrameChain[indexEnteredFrameChain]->owner()), fakeMouseMove, true); |
| } |
| } |
| |
| GestureEventWithHitTestResults EventHandler::targetGestureEvent(const PlatformGestureEvent& gestureEvent, bool readOnly) |
| { |
| TRACE_EVENT0("input", "EventHandler::targetGestureEvent"); |
| |
| ASSERT(m_frame == m_frame->localFrameRoot()); |
| // Scrolling events get hit tested per frame (like wheel events do). |
| ASSERT(!gestureEvent.isScrollEvent()); |
| |
| HitTestRequest::HitTestRequestType hitType = getHitTypeForGestureType(gestureEvent.type()); |
| double activeInterval = 0; |
| bool shouldKeepActiveForMinInterval = false; |
| if (readOnly) { |
| hitType |= HitTestRequest::ReadOnly; |
| } else if (gestureEvent.type() == PlatformEvent::GestureTap) { |
| // If the Tap is received very shortly after ShowPress, we want to |
| // delay clearing of the active state so that it's visible to the user |
| // for at least a couple of frames. |
| activeInterval = WTF::currentTime() - m_lastShowPressTimestamp; |
| shouldKeepActiveForMinInterval = m_lastShowPressTimestamp && activeInterval < minimumActiveInterval; |
| if (shouldKeepActiveForMinInterval) |
| hitType |= HitTestRequest::ReadOnly; |
| } |
| |
| GestureEventWithHitTestResults eventWithHitTestResults = hitTestResultForGestureEvent(gestureEvent, hitType); |
| // Now apply hover/active state to the final target. |
| HitTestRequest request(hitType | HitTestRequest::AllowChildFrameContent); |
| if (!request.readOnly()) |
| updateGestureHoverActiveState(request, eventWithHitTestResults.hitTestResult().innerElement()); |
| |
| if (shouldKeepActiveForMinInterval) { |
| m_lastDeferredTapElement = eventWithHitTestResults.hitTestResult().innerElement(); |
| m_activeIntervalTimer.startOneShot(minimumActiveInterval - activeInterval, FROM_HERE); |
| } |
| |
| return eventWithHitTestResults; |
| } |
| |
| GestureEventWithHitTestResults EventHandler::hitTestResultForGestureEvent(const PlatformGestureEvent& gestureEvent, HitTestRequest::HitTestRequestType hitType) |
| { |
| // Perform the rect-based hit-test (or point-based if adjustment is disabled). Note that |
| // we don't yet apply hover/active state here because we need to resolve touch adjustment |
| // first so that we apply hover/active it to the final adjusted node. |
| IntPoint hitTestPoint = m_frame->view()->rootFrameToContents(gestureEvent.position()); |
| LayoutSize padding; |
| if (shouldApplyTouchAdjustment(gestureEvent)) { |
| padding = LayoutSize(gestureEvent.area()); |
| if (!padding.isEmpty()) { |
| padding.scale(1.f / 2); |
| hitType |= HitTestRequest::ListBased; |
| } |
| } |
| HitTestResult hitTestResult = hitTestResultAtPoint(hitTestPoint, hitType | HitTestRequest::ReadOnly, padding); |
| |
| // Adjust the location of the gesture to the most likely nearby node, as appropriate for the |
| // type of event. |
| PlatformGestureEvent adjustedEvent = gestureEvent; |
| applyTouchAdjustment(&adjustedEvent, &hitTestResult); |
| |
| // Do a new hit-test at the (adjusted) gesture co-ordinates. This is necessary because |
| // rect-based hit testing and touch adjustment sometimes return a different node than |
| // what a point-based hit test would return for the same point. |
| // FIXME: Fix touch adjustment to avoid the need for a redundant hit test. http://crbug.com/398914 |
| if (shouldApplyTouchAdjustment(gestureEvent)) { |
| LocalFrame* hitFrame = hitTestResult.innerNodeFrame(); |
| if (!hitFrame) |
| hitFrame = m_frame; |
| hitTestResult = hitTestResultInFrame(hitFrame, hitFrame->view()->rootFrameToContents(adjustedEvent.position()), (hitType | HitTestRequest::ReadOnly) & ~HitTestRequest::ListBased); |
| } |
| |
| // If we did a rect-based hit test it must be resolved to the best single node by now to |
| // ensure consumers don't accidentally use one of the other candidates. |
| ASSERT(!hitTestResult.isRectBasedTest()); |
| |
| return GestureEventWithHitTestResults(adjustedEvent, hitTestResult); |
| } |
| |
| HitTestRequest::HitTestRequestType EventHandler::getHitTypeForGestureType(PlatformEvent::Type type) |
| { |
| HitTestRequest::HitTestRequestType hitType = HitTestRequest::TouchEvent; |
| switch (type) { |
| case PlatformEvent::GestureShowPress: |
| case PlatformEvent::GestureTapUnconfirmed: |
| return hitType | HitTestRequest::Active; |
| case PlatformEvent::GestureTapDownCancel: |
| // A TapDownCancel received when no element is active shouldn't really be changing hover state. |
| if (!m_frame->document()->activeHoverElement()) |
| hitType |= HitTestRequest::ReadOnly; |
| return hitType | HitTestRequest::Release; |
| case PlatformEvent::GestureTap: |
| return hitType | HitTestRequest::Release; |
| case PlatformEvent::GestureTapDown: |
| case PlatformEvent::GestureLongPress: |
| case PlatformEvent::GestureLongTap: |
| case PlatformEvent::GestureTwoFingerTap: |
| // FIXME: Shouldn't LongTap and TwoFingerTap clear the Active state? |
| return hitType | HitTestRequest::Active | HitTestRequest::ReadOnly; |
| default: |
| ASSERT_NOT_REACHED(); |
| return hitType | HitTestRequest::Active | HitTestRequest::ReadOnly; |
| } |
| } |
| |
| void EventHandler::applyTouchAdjustment(PlatformGestureEvent* gestureEvent, HitTestResult* hitTestResult) |
| { |
| if (!shouldApplyTouchAdjustment(*gestureEvent)) |
| return; |
| |
| Node* adjustedNode = nullptr; |
| IntPoint adjustedPoint = gestureEvent->position(); |
| bool adjusted = false; |
| switch (gestureEvent->type()) { |
| case PlatformEvent::GestureTap: |
| case PlatformEvent::GestureTapUnconfirmed: |
| case PlatformEvent::GestureTapDown: |
| case PlatformEvent::GestureShowPress: |
| adjusted = bestClickableNodeForHitTestResult(*hitTestResult, adjustedPoint, adjustedNode); |
| break; |
| case PlatformEvent::GestureLongPress: |
| case PlatformEvent::GestureLongTap: |
| case PlatformEvent::GestureTwoFingerTap: |
| adjusted = bestContextMenuNodeForHitTestResult(*hitTestResult, adjustedPoint, adjustedNode); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| |
| // Update the hit-test result to be a point-based result instead of a rect-based result. |
| // FIXME: We should do this even when no candidate matches the node filter. crbug.com/398914 |
| if (adjusted) { |
| hitTestResult->resolveRectBasedTest(adjustedNode, m_frame->view()->rootFrameToContents(adjustedPoint)); |
| gestureEvent->applyTouchAdjustment(adjustedPoint); |
| } |
| } |
| |
| bool EventHandler::sendContextMenuEvent(const PlatformMouseEvent& event, Node* overrideTargetNode) |
| { |
| FrameView* v = m_frame->view(); |
| if (!v) |
| return false; |
| |
| // Clear mouse press state to avoid initiating a drag while context menu is up. |
| m_mousePressed = false; |
| LayoutPoint positionInContents = v->rootFrameToContents(event.position()); |
| HitTestRequest request(HitTestRequest::Active); |
| MouseEventWithHitTestResults mev = m_frame->document()->prepareMouseEvent(request, positionInContents, event); |
| |
| selectionController().sendContextMenuEvent(mev, positionInContents); |
| |
| Node* targetNode = overrideTargetNode ? overrideTargetNode : mev.innerNode(); |
| return !dispatchMouseEvent(EventTypeNames::contextmenu, targetNode, 0, event, false); |
| } |
| |
| bool EventHandler::sendContextMenuEventForKey(Element* overrideTargetElement) |
| { |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return false; |
| |
| Document* doc = m_frame->document(); |
| if (!doc) |
| return false; |
| |
| // Clear mouse press state to avoid initiating a drag while context menu is up. |
| m_mousePressed = false; |
| |
| static const int kContextMenuMargin = 1; |
| |
| #if OS(WIN) |
| int rightAligned = ::GetSystemMetrics(SM_MENUDROPALIGNMENT); |
| #else |
| int rightAligned = 0; |
| #endif |
| IntPoint locationInRootFrame; |
| |
| Element* focusedElement = overrideTargetElement ? overrideTargetElement : doc->focusedElement(); |
| FrameSelection& selection = m_frame->selection(); |
| Position start = selection.selection().start(); |
| VisualViewport& visualViewport = m_frame->page()->frameHost().visualViewport(); |
| |
| if (!overrideTargetElement && start.anchorNode() && (selection.rootEditableElement() || selection.isRange())) { |
| IntRect firstRect = m_frame->editor().firstRectForRange(selection.selection().toNormalizedEphemeralRange()); |
| |
| int x = rightAligned ? firstRect.maxX() : firstRect.x(); |
| // In a multiline edit, firstRect.maxY() would endup on the next line, so -1. |
| int y = firstRect.maxY() ? firstRect.maxY() - 1 : 0; |
| locationInRootFrame = view->contentsToRootFrame(IntPoint(x, y)); |
| } else if (focusedElement) { |
| IntRect clippedRect = focusedElement->boundsInViewportSpace(); |
| // FIXME: boundsInViewportSpace is actually in the weird scaled but untranslated coordinate space of |
| // the old-style visual viewport. crbug.com/459591. |
| locationInRootFrame = flooredIntPoint(visualViewport.viewportCSSPixelsToRootFrame(clippedRect.center())); |
| } else { |
| locationInRootFrame = IntPoint( |
| rightAligned |
| ? visualViewport.visibleRect().maxX() - kContextMenuMargin |
| : visualViewport.location().x() + kContextMenuMargin, |
| visualViewport.location().y() + kContextMenuMargin); |
| } |
| |
| m_frame->view()->setCursor(pointerCursor()); |
| IntPoint locationInViewport = visualViewport.rootFrameToViewport(locationInRootFrame); |
| IntPoint globalPosition = view->hostWindow()->viewportToScreen(IntRect(locationInViewport, IntSize())).location(); |
| |
| Node* targetNode = overrideTargetElement ? overrideTargetElement : doc->focusedElement(); |
| if (!targetNode) |
| targetNode = doc; |
| |
| // Use the focused node as the target for hover and active. |
| HitTestRequest request(HitTestRequest::Active); |
| HitTestResult result(request, locationInRootFrame); |
| result.setInnerNode(targetNode); |
| doc->updateHoverActiveState(request, result.innerElement()); |
| |
| // The contextmenu event is a mouse event even when invoked using the keyboard. |
| // This is required for web compatibility. |
| PlatformEvent::Type eventType = PlatformEvent::MousePressed; |
| if (m_frame->settings()->showContextMenuOnMouseUp()) |
| eventType = PlatformEvent::MouseReleased; |
| |
| PlatformMouseEvent mouseEvent(locationInRootFrame, globalPosition, RightButton, eventType, 1, false, false, false, false, PlatformMouseEvent::RealOrIndistinguishable, WTF::currentTime()); |
| |
| handleMousePressEvent(mouseEvent); |
| return sendContextMenuEvent(mouseEvent, overrideTargetElement); |
| } |
| |
| bool EventHandler::sendContextMenuEventForGesture(const GestureEventWithHitTestResults& targetedEvent) |
| { |
| const PlatformGestureEvent& gestureEvent = targetedEvent.event(); |
| unsigned modifiers = gestureEvent.modifiers(); |
| |
| // Send MouseMoved event prior to handling (https://crbug.com/485290). |
| PlatformMouseEvent fakeMouseMove(gestureEvent.position(), gestureEvent.globalPosition(), |
| NoButton, PlatformEvent::MouseMoved, /* clickCount */ 0, |
| static_cast<PlatformEvent::Modifiers>(modifiers), |
| PlatformMouseEvent::FromTouch, gestureEvent.timestamp()); |
| dispatchMouseEvent(EventTypeNames::mousemove, targetedEvent.hitTestResult().innerNode(), 0, fakeMouseMove, true); |
| |
| PlatformEvent::Type eventType = PlatformEvent::MousePressed; |
| |
| if (m_frame->settings()->showContextMenuOnMouseUp()) |
| eventType = PlatformEvent::MouseReleased; |
| else |
| modifiers |= PlatformEvent::RightButtonDown; |
| |
| PlatformMouseEvent mouseEvent(targetedEvent.event().position(), targetedEvent.event().globalPosition(), RightButton, eventType, 1, |
| static_cast<PlatformEvent::Modifiers>(modifiers), |
| PlatformMouseEvent::FromTouch, WTF::currentTime()); |
| // To simulate right-click behavior, we send a right mouse down and then |
| // context menu event. |
| // FIXME: Send HitTestResults to avoid redundant hit tests. |
| handleMousePressEvent(mouseEvent); |
| return sendContextMenuEvent(mouseEvent); |
| // We do not need to send a corresponding mouse release because in case of |
| // right-click, the context menu takes capture and consumes all events. |
| } |
| |
| void EventHandler::scheduleHoverStateUpdate() |
| { |
| if (!m_hoverTimer.isActive()) |
| m_hoverTimer.startOneShot(0, FROM_HERE); |
| } |
| |
| void EventHandler::scheduleCursorUpdate() |
| { |
| // We only want one timer for the page, rather than each frame having it's own timer |
| // competing which eachother (since there's only one mouse cursor). |
| ASSERT(m_frame == m_frame->localFrameRoot()); |
| |
| if (!m_cursorUpdateTimer.isActive()) |
| m_cursorUpdateTimer.startOneShot(cursorUpdateInterval, FROM_HERE); |
| } |
| |
| bool EventHandler::cursorUpdatePending() |
| { |
| return m_cursorUpdateTimer.isActive(); |
| } |
| |
| void EventHandler::dispatchFakeMouseMoveEventSoon() |
| { |
| if (m_mousePressed) |
| return; |
| |
| if (m_mousePositionIsUnknown) |
| return; |
| |
| Settings* settings = m_frame->settings(); |
| if (settings && !settings->deviceSupportsMouse()) |
| return; |
| |
| // Reschedule the timer, to prevent dispatching mouse move events |
| // during a scroll. This avoids a potential source of scroll jank. |
| if (m_fakeMouseMoveEventTimer.isActive()) |
| m_fakeMouseMoveEventTimer.stop(); |
| m_fakeMouseMoveEventTimer.startOneShot(fakeMouseMoveInterval, FROM_HERE); |
| } |
| |
| void EventHandler::dispatchFakeMouseMoveEventSoonInQuad(const FloatQuad& quad) |
| { |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return; |
| |
| if (!quad.containsPoint(view->rootFrameToContents(m_lastKnownMousePosition))) |
| return; |
| |
| dispatchFakeMouseMoveEventSoon(); |
| } |
| |
| void EventHandler::fakeMouseMoveEventTimerFired(Timer<EventHandler>* timer) |
| { |
| TRACE_EVENT0("input", "EventHandler::fakeMouseMoveEventTimerFired"); |
| ASSERT_UNUSED(timer, timer == &m_fakeMouseMoveEventTimer); |
| ASSERT(!m_mousePressed); |
| |
| Settings* settings = m_frame->settings(); |
| if (settings && !settings->deviceSupportsMouse()) |
| return; |
| |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return; |
| |
| if (!m_frame->page() || !m_frame->page()->focusController().isActive()) |
| return; |
| |
| // Don't dispatch a synthetic mouse move event if the mouse cursor is not visible to the user. |
| if (!isCursorVisible()) |
| return; |
| |
| bool shiftKey; |
| bool ctrlKey; |
| bool altKey; |
| bool metaKey; |
| PlatformKeyboardEvent::getCurrentModifierState(shiftKey, ctrlKey, altKey, metaKey); |
| PlatformMouseEvent fakeMouseMoveEvent(m_lastKnownMousePosition, m_lastKnownMouseGlobalPosition, NoButton, PlatformEvent::MouseMoved, 0, shiftKey, ctrlKey, altKey, metaKey, PlatformMouseEvent::RealOrIndistinguishable, currentTime()); |
| handleMouseMoveEvent(fakeMouseMoveEvent); |
| } |
| |
| void EventHandler::cancelFakeMouseMoveEvent() |
| { |
| m_fakeMouseMoveEventTimer.stop(); |
| } |
| |
| bool EventHandler::isCursorVisible() const |
| { |
| return m_frame->page()->isCursorVisible(); |
| } |
| |
| void EventHandler::setResizingFrameSet(HTMLFrameSetElement* frameSet) |
| { |
| m_frameSetBeingResized = frameSet; |
| } |
| |
| void EventHandler::resizeScrollableAreaDestroyed() |
| { |
| ASSERT(m_resizeScrollableArea); |
| m_resizeScrollableArea = nullptr; |
| } |
| |
| void EventHandler::hoverTimerFired(Timer<EventHandler>*) |
| { |
| TRACE_EVENT0("input", "EventHandler::hoverTimerFired"); |
| m_hoverTimer.stop(); |
| |
| ASSERT(m_frame); |
| ASSERT(m_frame->document()); |
| |
| if (LayoutView* layoutObject = m_frame->contentLayoutObject()) { |
| if (FrameView* view = m_frame->view()) { |
| HitTestRequest request(HitTestRequest::Move); |
| HitTestResult result(request, view->rootFrameToContents(m_lastKnownMousePosition)); |
| layoutObject->hitTest(result); |
| m_frame->document()->updateHoverActiveState(request, result.innerElement()); |
| } |
| } |
| } |
| |
| void EventHandler::activeIntervalTimerFired(Timer<EventHandler>*) |
| { |
| TRACE_EVENT0("input", "EventHandler::activeIntervalTimerFired"); |
| m_activeIntervalTimer.stop(); |
| |
| if (m_frame |
| && m_frame->document() |
| && m_lastDeferredTapElement) { |
| // FIXME: Enable condition when http://crbug.com/226842 lands |
| // m_lastDeferredTapElement.get() == m_frame->document()->activeElement() |
| HitTestRequest request(HitTestRequest::TouchEvent | HitTestRequest::Release); |
| m_frame->document()->updateHoverActiveState(request, m_lastDeferredTapElement.get()); |
| } |
| m_lastDeferredTapElement = nullptr; |
| } |
| |
| void EventHandler::notifyElementActivated() |
| { |
| // Since another element has been set to active, stop current timer and clear reference. |
| if (m_activeIntervalTimer.isActive()) |
| m_activeIntervalTimer.stop(); |
| m_lastDeferredTapElement = nullptr; |
| } |
| |
| bool EventHandler::handleAccessKey(const PlatformKeyboardEvent& evt) |
| { |
| // FIXME: Ignoring the state of Shift key is what neither IE nor Firefox do. |
| // IE matches lower and upper case access keys regardless of Shift key state - but if both upper and |
| // lower case variants are present in a document, the correct element is matched based on Shift key state. |
| // Firefox only matches an access key if Shift is not pressed, and does that case-insensitively. |
| ASSERT(!(accessKeyModifiers() & PlatformEvent::ShiftKey)); |
| if ((evt.modifiers() & ~PlatformEvent::ShiftKey) != accessKeyModifiers()) |
| return false; |
| String key = evt.unmodifiedText(); |
| Element* elem = m_frame->document()->getElementByAccessKey(key.lower()); |
| if (!elem) |
| return false; |
| elem->accessKeyAction(false); |
| return true; |
| } |
| |
| bool EventHandler::keyEvent(const PlatformKeyboardEvent& initialKeyEvent) |
| { |
| RefPtrWillBeRawPtr<FrameView> protector(m_frame->view()); |
| |
| if (initialKeyEvent.windowsVirtualKeyCode() == VK_CAPITAL) |
| capsLockStateMayHaveChanged(); |
| |
| #if OS(WIN) |
| if (panScrollInProgress()) { |
| // If a key is pressed while the panScroll is in progress then we want to stop |
| if (initialKeyEvent.type() == PlatformEvent::KeyDown || initialKeyEvent.type() == PlatformEvent::RawKeyDown) |
| stopAutoscroll(); |
| |
| // If we were in panscroll mode, we swallow the key event |
| return true; |
| } |
| #endif |
| |
| // Check for cases where we are too early for events -- possible unmatched key up |
| // from pressing return in the location bar. |
| RefPtrWillBeRawPtr<Node> node = eventTargetNodeForDocument(m_frame->document()); |
| if (!node) |
| return false; |
| |
| UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture); |
| |
| // In IE, access keys are special, they are handled after default keydown processing, but cannot be canceled - this is hard to match. |
| // On Mac OS X, we process them before dispatching keydown, as the default keydown handler implements Emacs key bindings, which may conflict |
| // with access keys. Then we dispatch keydown, but suppress its default handling. |
| // On Windows, WebKit explicitly calls handleAccessKey() instead of dispatching a keypress event for WM_SYSCHAR messages. |
| // Other platforms currently match either Mac or Windows behavior, depending on whether they send combined KeyDown events. |
| bool matchedAnAccessKey = false; |
| if (initialKeyEvent.type() == PlatformEvent::KeyDown) |
| matchedAnAccessKey = handleAccessKey(initialKeyEvent); |
| |
| // FIXME: it would be fair to let an input method handle KeyUp events before DOM dispatch. |
| if (initialKeyEvent.type() == PlatformEvent::KeyUp || initialKeyEvent.type() == PlatformEvent::Char) |
| return !node->dispatchKeyEvent(initialKeyEvent); |
| |
| PlatformKeyboardEvent keyDownEvent = initialKeyEvent; |
| if (keyDownEvent.type() != PlatformEvent::RawKeyDown) |
| keyDownEvent.disambiguateKeyDownEvent(PlatformEvent::RawKeyDown); |
| RefPtrWillBeRawPtr<KeyboardEvent> keydown = KeyboardEvent::create(keyDownEvent, m_frame->document()->domWindow()); |
| if (matchedAnAccessKey) |
| keydown->setDefaultPrevented(true); |
| keydown->setTarget(node); |
| |
| if (initialKeyEvent.type() == PlatformEvent::RawKeyDown) { |
| node->dispatchEvent(keydown); |
| // 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); |
| // 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); |
| |
| return keydownResult || keypress->defaultPrevented() || keypress->defaultHandled(); |
| } |
| |
| static WebFocusType focusDirectionForKey(const AtomicString& keyIdentifier) |
| { |
| DEFINE_STATIC_LOCAL(AtomicString, Down, ("Down", AtomicString::ConstructFromLiteral)); |
| DEFINE_STATIC_LOCAL(AtomicString, Up, ("Up", AtomicString::ConstructFromLiteral)); |
| DEFINE_STATIC_LOCAL(AtomicString, Left, ("Left", AtomicString::ConstructFromLiteral)); |
| DEFINE_STATIC_LOCAL(AtomicString, Right, ("Right", AtomicString::ConstructFromLiteral)); |
| |
| WebFocusType retVal = WebFocusTypeNone; |
| |
| if (keyIdentifier == Down) |
| retVal = WebFocusTypeDown; |
| else if (keyIdentifier == Up) |
| retVal = WebFocusTypeUp; |
| else if (keyIdentifier == Left) |
| retVal = WebFocusTypeLeft; |
| else if (keyIdentifier == Right) |
| retVal = WebFocusTypeRight; |
| |
| return retVal; |
| } |
| |
| void EventHandler::defaultKeyboardEventHandler(KeyboardEvent* event) |
| { |
| if (event->type() == EventTypeNames::keydown) { |
| // Clear caret blinking suspended state to make sure that caret blinks |
| // when we type again after long pressing on an empty input field. |
| if (m_frame && m_frame->selection().isCaretBlinkingSuspended()) |
| m_frame->selection().setCaretBlinkingSuspended(false); |
| |
| m_frame->editor().handleKeyboardEvent(event); |
| if (event->defaultHandled()) |
| return; |
| if (event->keyIdentifier() == "U+0009") { |
| defaultTabEventHandler(event); |
| } else if (event->keyIdentifier() == "U+0008") { |
| defaultBackspaceEventHandler(event); |
| } else if (event->keyIdentifier() == "U+001B") { |
| defaultEscapeEventHandler(event); |
| } else { |
| WebFocusType type = focusDirectionForKey(AtomicString(event->keyIdentifier())); |
| if (type != WebFocusTypeNone) |
| defaultArrowEventHandler(type, event); |
| } |
| } |
| if (event->type() == EventTypeNames::keypress) { |
| m_frame->editor().handleKeyboardEvent(event); |
| if (event->defaultHandled()) |
| return; |
| if (event->charCode() == ' ') |
| defaultSpaceEventHandler(event); |
| } |
| } |
| |
| bool EventHandler::dragHysteresisExceeded(const IntPoint& dragLocationInRootFrame) const |
| { |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return false; |
| IntPoint dragLocation = view->rootFrameToContents(dragLocationInRootFrame); |
| IntSize delta = dragLocation - m_mouseDownPos; |
| |
| int threshold = GeneralDragHysteresis; |
| switch (dragState().m_dragType) { |
| case DragSourceActionSelection: |
| threshold = TextDragHysteresis; |
| break; |
| case DragSourceActionImage: |
| threshold = ImageDragHysteresis; |
| break; |
| case DragSourceActionLink: |
| threshold = LinkDragHysteresis; |
| break; |
| case DragSourceActionDHTML: |
| break; |
| case DragSourceActionNone: |
| ASSERT_NOT_REACHED(); |
| } |
| |
| return abs(delta.width()) >= threshold || abs(delta.height()) >= threshold; |
| } |
| |
| void EventHandler::clearDragDataTransfer() |
| { |
| if (dragState().m_dragDataTransfer) { |
| dragState().m_dragDataTransfer->clearDragImage(); |
| dragState().m_dragDataTransfer->setAccessPolicy(DataTransferNumb); |
| } |
| } |
| |
| void EventHandler::dragSourceEndedAt(const PlatformMouseEvent& event, DragOperation operation) |
| { |
| // Send a hit test request so that Layer gets a chance to update the :hover and :active pseudoclasses. |
| HitTestRequest request(HitTestRequest::Release); |
| prepareMouseEvent(request, event); |
| |
| if (dragState().m_dragSrc) { |
| dragState().m_dragDataTransfer->setDestinationOperation(operation); |
| // for now we don't care if event handler cancels default behavior, since there is none |
| dispatchDragSrcEvent(EventTypeNames::dragend, event); |
| } |
| clearDragDataTransfer(); |
| dragState().m_dragSrc = nullptr; |
| // In case the drag was ended due to an escape key press we need to ensure |
| // that consecutive mousemove events don't reinitiate the drag and drop. |
| m_mouseDownMayStartDrag = false; |
| } |
| |
| void EventHandler::updateDragStateAfterEditDragIfNeeded(Element* rootEditableElement) |
| { |
| // If inserting the dragged contents removed the drag source, we still want to fire dragend at the root editble element. |
| if (dragState().m_dragSrc && !dragState().m_dragSrc->inDocument()) |
| dragState().m_dragSrc = rootEditableElement; |
| } |
| |
| // returns if we should continue "default processing", i.e., whether eventhandler canceled |
| bool EventHandler::dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent& event) |
| { |
| return !dispatchDragEvent(eventType, dragState().m_dragSrc.get(), event, dragState().m_dragDataTransfer.get()); |
| } |
| |
| bool EventHandler::handleDrag(const MouseEventWithHitTestResults& event, DragInitiator initiator) |
| { |
| ASSERT(event.event().type() == PlatformEvent::MouseMoved); |
| // Callers must protect the reference to FrameView, since this function may dispatch DOM |
| // events, causing page/FrameView to go away. |
| ASSERT(m_frame); |
| ASSERT(m_frame->view()); |
| if (!m_frame->page()) |
| return false; |
| |
| if (m_mouseDownMayStartDrag) { |
| HitTestRequest request(HitTestRequest::ReadOnly); |
| HitTestResult result(request, m_mouseDownPos); |
| m_frame->contentLayoutObject()->hitTest(result); |
| Node* node = result.innerNode(); |
| if (node) { |
| DragController::SelectionDragPolicy selectionDragPolicy = event.event().timestamp() - m_mouseDownTimestamp < TextDragDelay |
| ? DragController::DelayedSelectionDragResolution |
| : DragController::ImmediateSelectionDragResolution; |
| dragState().m_dragSrc = m_frame->page()->dragController().draggableNode(m_frame, node, m_mouseDownPos, selectionDragPolicy, dragState().m_dragType); |
| } else { |
| dragState().m_dragSrc = nullptr; |
| } |
| |
| if (!dragState().m_dragSrc) |
| m_mouseDownMayStartDrag = false; // no element is draggable |
| } |
| |
| if (!m_mouseDownMayStartDrag) |
| return initiator == DragInitiator::Mouse && !selectionController().mouseDownMayStartSelect() && !m_mouseDownMayStartAutoscroll; |
| |
| // We are starting a text/image/url drag, so the cursor should be an arrow |
| // FIXME <rdar://7577595>: Custom cursors aren't supported during drag and drop (default to pointer). |
| m_frame->view()->setCursor(pointerCursor()); |
| |
| if (initiator == DragInitiator::Mouse && !dragHysteresisExceeded(event.event().position())) |
| return true; |
| |
| // Once we're past the hysteresis point, we don't want to treat this gesture as a click |
| invalidateClick(); |
| |
| if (!tryStartDrag(event)) { |
| // Something failed to start the drag, clean up. |
| clearDragDataTransfer(); |
| dragState().m_dragSrc = nullptr; |
| } |
| |
| m_mouseDownMayStartDrag = false; |
| // Whether or not the drag actually started, no more default handling (like selection). |
| return true; |
| } |
| |
| bool EventHandler::tryStartDrag(const MouseEventWithHitTestResults& event) |
| { |
| // The DataTransfer would only be non-empty if we missed a dragEnd. |
| // Clear it anyway, just to make sure it gets numbified. |
| clearDragDataTransfer(); |
| |
| dragState().m_dragDataTransfer = createDraggingDataTransfer(); |
| |
| // Check to see if this a DOM based drag, if it is get the DOM specified drag |
| // image and offset |
| if (dragState().m_dragType == DragSourceActionDHTML) { |
| if (LayoutObject* layoutObject = dragState().m_dragSrc->layoutObject()) { |
| FloatPoint absPos = layoutObject->localToAbsolute(FloatPoint(), UseTransforms); |
| IntSize delta = m_mouseDownPos - roundedIntPoint(absPos); |
| dragState().m_dragDataTransfer->setDragImageElement(dragState().m_dragSrc.get(), IntPoint(delta)); |
| } else { |
| // The layoutObject has disappeared, this can happen if the onStartDrag handler has hidden |
| // the element in some way. In this case we just kill the drag. |
| return false; |
| } |
| } |
| |
| DragController& dragController = m_frame->page()->dragController(); |
| if (!dragController.populateDragDataTransfer(m_frame, dragState(), m_mouseDownPos)) |
| return false; |
| |
| // If dispatching dragstart brings about another mouse down -- one way |
| // this will happen is if a DevTools user breaks within a dragstart |
| // handler and then clicks on the suspended page -- the drag state is |
| // reset. Hence, need to check if this particular drag operation can |
| // continue even if dispatchEvent() indicates no (direct) cancellation. |
| // Do that by checking if m_dragSrc is still set. |
| m_mouseDownMayStartDrag = dispatchDragSrcEvent(EventTypeNames::dragstart, m_mouseDown) |
| && !m_frame->selection().isInPasswordField() && dragState().m_dragSrc; |
| |
| // Invalidate clipboard here against anymore pasteboard writing for security. The drag |
| // image can still be changed as we drag, but not the pasteboard data. |
| dragState().m_dragDataTransfer->setAccessPolicy(DataTransferImageWritable); |
| |
| if (m_mouseDownMayStartDrag) { |
| // Dispatching the event could cause Page to go away. Make sure it's still valid before trying to use DragController. |
| if (m_frame->page() && dragController.startDrag(m_frame, dragState(), event.event(), m_mouseDownPos)) |
| return true; |
| // Drag was canned at the last minute - we owe m_dragSrc a DRAGEND event |
| dispatchDragSrcEvent(EventTypeNames::dragend, event.event()); |
| } |
| |
| return false; |
| } |
| |
| bool EventHandler::handleTextInputEvent(const String& text, Event* underlyingEvent, TextEventInputType inputType) |
| { |
| // Platforms should differentiate real commands like selectAll from text input in disguise (like insertNewline), |
| // and avoid dispatching text input events from keydown default handlers. |
| ASSERT(!underlyingEvent || !underlyingEvent->isKeyboardEvent() || toKeyboardEvent(underlyingEvent)->type() == EventTypeNames::keypress); |
| |
| if (!m_frame) |
| return false; |
| |
| EventTarget* target; |
| if (underlyingEvent) |
| target = underlyingEvent->target(); |
| else |
| target = eventTargetNodeForDocument(m_frame->document()); |
| if (!target) |
| return false; |
| |
| RefPtrWillBeRawPtr<TextEvent> event = TextEvent::create(m_frame->domWindow(), text, inputType); |
| event->setUnderlyingEvent(underlyingEvent); |
| |
| target->dispatchEvent(event); |
| return event->defaultHandled(); |
| } |
| |
| void EventHandler::defaultTextInputEventHandler(TextEvent* event) |
| { |
| if (m_frame->editor().handleTextEvent(event)) |
| event->setDefaultHandled(); |
| } |
| |
| void EventHandler::defaultSpaceEventHandler(KeyboardEvent* event) |
| { |
| ASSERT(event->type() == EventTypeNames::keypress); |
| |
| if (event->ctrlKey() || event->metaKey() || event->altKey()) |
| return; |
| |
| ScrollDirection direction = event->shiftKey() ? ScrollBlockDirectionBackward : ScrollBlockDirectionForward; |
| |
| // FIXME: enable scroll customization in this case. See crbug.com/410974. |
| if (scroll(direction, ScrollByPage).didScroll) { |
| event->setDefaultHandled(); |
| return; |
| } |
| |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return; |
| |
| ScrollDirectionPhysical physicalDirection = |
| toPhysicalDirection(direction, view->isVerticalDocument(), view->isFlippedDocument()); |
| |
| if (view->scrollableArea()->userScroll(physicalDirection, ScrollByPage).didScroll) |
| event->setDefaultHandled(); |
| } |
| |
| void EventHandler::defaultBackspaceEventHandler(KeyboardEvent* event) |
| { |
| ASSERT(event->type() == EventTypeNames::keydown); |
| |
| if (event->ctrlKey() || event->metaKey() || event->altKey()) |
| return; |
| |
| if (!m_frame->editor().behavior().shouldNavigateBackOnBackspace()) |
| return; |
| bool handledEvent = m_frame->loader().client()->navigateBackForward(event->shiftKey() ? 1 : -1); |
| if (handledEvent) |
| event->setDefaultHandled(); |
| } |
| |
| void EventHandler::defaultArrowEventHandler(WebFocusType focusType, KeyboardEvent* event) |
| { |
| ASSERT(event->type() == EventTypeNames::keydown); |
| |
| if (event->ctrlKey() || event->metaKey() || event->shiftKey()) |
| return; |
| |
| Page* page = m_frame->page(); |
| if (!page) |
| return; |
| |
| if (!isSpatialNavigationEnabled(m_frame)) |
| return; |
| |
| // Arrows and other possible directional navigation keys can be used in design |
| // mode editing. |
| if (m_frame->document()->inDesignMode()) |
| return; |
| |
| if (page->focusController().advanceFocus(focusType)) |
| event->setDefaultHandled(); |
| } |
| |
| void EventHandler::defaultTabEventHandler(KeyboardEvent* event) |
| { |
| ASSERT(event->type() == EventTypeNames::keydown); |
| |
| // We should only advance focus on tabs if no special modifier keys are held down. |
| if (event->ctrlKey() || event->metaKey()) |
| return; |
| |
| #if !OS(MACOSX) |
| // Option-Tab is a shortcut based on a system-wide preference on Mac but |
| // should be ignored on all other platforms. |
| if (event->altKey()) |
| return; |
| #endif |
| |
| Page* page = m_frame->page(); |
| if (!page) |
| return; |
| if (!page->tabKeyCyclesThroughElements()) |
| return; |
| |
| WebFocusType focusType = event->shiftKey() ? WebFocusTypeBackward : WebFocusTypeForward; |
| |
| // Tabs can be used in design mode editing. |
| if (m_frame->document()->inDesignMode()) |
| return; |
| |
| if (page->focusController().advanceFocus(focusType, InputDeviceCapabilities::doesntFireTouchEventsSourceCapabilities())) |
| event->setDefaultHandled(); |
| } |
| |
| void EventHandler::defaultEscapeEventHandler(KeyboardEvent* event) |
| { |
| if (HTMLDialogElement* dialog = m_frame->document()->activeModalDialog()) |
| dialog->dispatchEvent(Event::createCancelable(EventTypeNames::cancel)); |
| } |
| |
| void EventHandler::capsLockStateMayHaveChanged() |
| { |
| if (Element* element = m_frame->document()->focusedElement()) { |
| if (LayoutObject* r = element->layoutObject()) { |
| if (r->isTextField()) |
| toLayoutTextControlSingleLine(r)->capsLockStateMayHaveChanged(); |
| } |
| } |
| } |
| |
| void EventHandler::setFrameWasScrolledByUser() |
| { |
| if (DocumentLoader* documentLoader = m_frame->loader().documentLoader()) |
| documentLoader->initialScrollState().wasScrolledByUser = true; |
| } |
| |
| bool EventHandler::passMousePressEventToScrollbar(MouseEventWithHitTestResults& mev) |
| { |
| Scrollbar* scrollbar = mev.scrollbar(); |
| updateLastScrollbarUnderMouse(scrollbar, true); |
| |
| if (!scrollbar || !scrollbar->enabled()) |
| return false; |
| setFrameWasScrolledByUser(); |
| scrollbar->mouseDown(mev.event()); |
| return true; |
| } |
| |
| // If scrollbar (under mouse) is different from last, send a mouse exited. Set |
| // last to scrollbar if setLast is true; else set last to 0. |
| void EventHandler::updateLastScrollbarUnderMouse(Scrollbar* scrollbar, bool setLast) |
| { |
| if (m_lastScrollbarUnderMouse != scrollbar) { |
| // Send mouse exited to the old scrollbar. |
| if (m_lastScrollbarUnderMouse) |
| m_lastScrollbarUnderMouse->mouseExited(); |
| |
| // Send mouse entered if we're setting a new scrollbar. |
| if (scrollbar && setLast) |
| scrollbar->mouseEntered(); |
| |
| m_lastScrollbarUnderMouse = setLast ? scrollbar : nullptr; |
| } |
| } |
| |
| static const AtomicString& touchEventNameForTouchPointState(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: |
| // Fall through to default |
| default: |
| ASSERT_NOT_REACHED(); |
| return emptyAtom; |
| } |
| } |
| |
| static const AtomicString& pointerEventNameForTouchPointState(PlatformTouchPoint::State state) |
| { |
| switch (state) { |
| case PlatformTouchPoint::TouchReleased: |
| return EventTypeNames::pointerup; |
| case PlatformTouchPoint::TouchCancelled: |
| return EventTypeNames::pointercancel; |
| case PlatformTouchPoint::TouchPressed: |
| return EventTypeNames::pointerdown; |
| case PlatformTouchPoint::TouchMoved: |
| return EventTypeNames::pointermove; |
| case PlatformTouchPoint::TouchStationary: |
| // Fall through to default |
| default: |
| ASSERT_NOT_REACHED(); |
| return emptyAtom; |
| } |
| } |
| |
| PointerIdManager::PointerType pointerTypeForWebPointPointerType(WebPointerProperties::PointerType type) |
| { |
| // TODO(e_hakkinen): Simplify this by changing PointerIdManager to use |
| // WebPointerProperties::PointerType instead of defining its own enum. |
| switch (type) { |
| case WebPointerProperties::PointerTypeUnknown: |
| return PointerIdManager::PointerTypeUnknown; |
| case WebPointerProperties::PointerTypeTouch: |
| return PointerIdManager::PointerTypeTouch; |
| case WebPointerProperties::PointerTypePen: |
| return PointerIdManager::PointerTypePen; |
| case WebPointerProperties::PointerTypeMouse: |
| return PointerIdManager::PointerTypeMouse; |
| } |
| ASSERT_NOT_REACHED(); |
| return PointerIdManager::PointerTypeUnknown; |
| } |
| |
| static const char* pointerTypeNameForWebPointPointerType(WebPointerProperties::PointerType type) |
| { |
| switch (type) { |
| case WebPointerProperties::PointerTypeUnknown: |
| return ""; |
| case WebPointerProperties::PointerTypeTouch: |
| return "touch"; |
| case WebPointerProperties::PointerTypePen: |
| return "pen"; |
| case WebPointerProperties::PointerTypeMouse: |
| return "mouse"; |
| } |
| ASSERT_NOT_REACHED(); |
| return ""; |
| } |
| |
| HitTestResult EventHandler::hitTestResultInFrame(LocalFrame* frame, const LayoutPoint& point, HitTestRequest::HitTestRequestType hitType) |
| { |
| HitTestResult result(HitTestRequest(hitType), point); |
| |
| if (!frame || !frame->contentLayoutObject()) |
| return result; |
| if (frame->view()) { |
| IntRect rect = frame->view()->visibleContentRect(IncludeScrollbars); |
| if (!rect.contains(roundedIntPoint(point))) |
| return result; |
| } |
| frame->contentLayoutObject()->hitTest(result); |
| return result; |
| } |
| |
| void EventHandler::dispatchPointerEventsForTouchEvent(const PlatformTouchEvent& event, |
| WillBeHeapVector<TouchInfo>& touchInfos) |
| { |
| // Iterate through the touch points, sending PointerEvents to the targets as required. |
| for (unsigned i = 0; i < touchInfos.size(); ++i) { |
| TouchInfo& touchInfo = touchInfos[i]; |
| const PlatformTouchPoint& point = touchInfo.point; |
| const unsigned& pointerId = point.id(); |
| const PlatformTouchPoint::State pointState = point.state(); |
| |
| if (pointState == PlatformTouchPoint::TouchStationary || !touchInfo.knownTarget) |
| continue; |
| |
| bool pointerReleasedOrCancelled = pointState == PlatformTouchPoint::TouchReleased |
| || pointState == PlatformTouchPoint::TouchCancelled; |
| const PointerIdManager::PointerType pointerType = pointerTypeForWebPointPointerType(point.pointerProperties().pointerType); |
| const String& pointerTypeStr = pointerTypeNameForWebPointPointerType(point.pointerProperties().pointerType); |
| |
| if (pointState == PlatformTouchPoint::TouchPressed) |
| m_pointerIdManager.add(pointerType, pointerId); |
| |
| const AtomicString& eventName = pointerEventNameForTouchPointState(pointState); |
| |
| bool isEnterOrLeave = false; |
| |
| PointerEventInit pointerEventInit; |
| pointerEventInit.setPointerId(pointerId); |
| pointerEventInit.setWidth(touchInfo.adjustedRadius.width()); |
| pointerEventInit.setHeight(touchInfo.adjustedRadius.height()); |
| pointerEventInit.setPressure(point.force()); |
| pointerEventInit.setTiltX(point.pointerProperties().tiltX); |
| pointerEventInit.setTiltY(point.pointerProperties().tiltY); |
| pointerEventInit.setPointerType(pointerTypeStr); |
| pointerEventInit.setIsPrimary(m_pointerIdManager.isPrimary(pointerType, pointerId)); |
| pointerEventInit.setScreenX(point.screenPos().x()); |
| pointerEventInit.setScreenY(point.screenPos().y()); |
| pointerEventInit.setClientX(touchInfo.adjustedPagePoint.x()); |
| pointerEventInit.setClientY(touchInfo.adjustedPagePoint.y()); |
| pointerEventInit.setButton(0); |
| pointerEventInit.setButtons(pointerReleasedOrCancelled ? 0 : 1); |
| |
| pointerEventInit.setCtrlKey(event.ctrlKey()); |
| pointerEventInit.setShiftKey(event.shiftKey()); |
| pointerEventInit.setAltKey(event.altKey()); |
| pointerEventInit.setMetaKey(event.metaKey()); |
| |
| pointerEventInit.setBubbles(!isEnterOrLeave); |
| pointerEventInit.setCancelable(!isEnterOrLeave && pointState != PlatformTouchPoint::TouchCancelled); |
| |
| RefPtrWillBeRawPtr<PointerEvent> pointerEvent = PointerEvent::create(eventName, pointerEventInit); |
| touchInfo.touchTarget->dispatchEvent(pointerEvent.get()); |
| touchInfo.consumed = pointerEvent->defaultPrevented() || pointerEvent->defaultHandled(); |
| |
| // Remove the released/cancelled id at the end to correctly determine primary id above. |
| if (pointerReleasedOrCancelled) |
| m_pointerIdManager.remove(pointerType, pointerId); |
| } |
| } |
| |
| void EventHandler::sendPointerCancels(WillBeHeapVector<TouchInfo>& touchInfos) |
| { |
| for (unsigned i = 0; i < touchInfos.size(); ++i) { |
| TouchInfo& touchInfo = touchInfos[i]; |
| const PlatformTouchPoint& point = touchInfo.point; |
| const unsigned& pointerId = point.id(); |
| const PlatformTouchPoint::State pointState = point.state(); |
| |
| if (pointState == PlatformTouchPoint::TouchReleased |
| || pointState == PlatformTouchPoint::TouchCancelled) |
| continue; |
| |
| PointerEventInit pointerEventInit; |
| pointerEventInit.setPointerId(pointerId); |
| pointerEventInit.setBubbles(true); |
| pointerEventInit.setCancelable(false); |
| |
| RefPtrWillBeRawPtr<PointerEvent> pointerEvent = PointerEvent::create( |
| EventTypeNames::pointercancel, pointerEventInit); |
| touchInfo.touchTarget->dispatchEvent(pointerEvent.get()); |
| |
| m_pointerIdManager.remove(PointerIdManager::PointerTypeTouch, pointerId); |
| } |
| } |
| |
| bool EventHandler::dispatchTouchEvents(const PlatformTouchEvent& event, |
| WillBeHeapVector<TouchInfo>& touchInfos, bool freshTouchEvents, bool allTouchReleased) |
| { |
| // Build up the lists to use for the 'touches', 'targetTouches' and |
| // 'changedTouches' attributes in the JS event. See |
| // http://www.w3.org/TR/touch-events/#touchevent-interface for how these |
| // lists fit together. |
| |
| // Holds the complete set of touches on the screen. |
| RefPtrWillBeRawPtr<TouchList> touches = TouchList::create(); |
| |
| // A different view on the 'touches' list above, filtered and grouped by |
| // event target. Used for the 'targetTouches' list in the JS event. |
| using TargetTouchesHeapMap = WillBeHeapHashMap<EventTarget*, RefPtrWillBeMember<TouchList>>; |
| TargetTouchesHeapMap touchesByTarget; |
| |
| // Array of touches per state, used to assemble the 'changedTouches' list. |
| using EventTargetSet = WillBeHeapHashSet<RefPtrWillBeMember<EventTarget>>; |
| struct { |
| // The touches corresponding to the particular change state this struct |
| // instance represents. |
| RefPtrWillBeMember<TouchList> m_touches; |
| // Set of targets involved in m_touches. |
| EventTargetSet m_targets; |
| } changedTouches[PlatformTouchPoint::TouchStateEnd]; |
| |
| for (unsigned i = 0; i < touchInfos.size(); ++i) { |
| const TouchInfo& touchInfo = touchInfos[i]; |
| const PlatformTouchPoint& point = touchInfo.point; |
| PlatformTouchPoint::State pointState = point.state(); |
| |
| if (touchInfo.consumed) |
| continue; |
| |
| RefPtrWillBeRawPtr<Touch> touch = Touch::create( |
| touchInfo.targetFrame.get(), |
| touchInfo.touchTarget.get(), |
| point.id(), |
| point.screenPos(), |
| touchInfo.adjustedPagePoint, |
| touchInfo.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(touchInfo.touchTarget.get()); |
| if (targetTouchesIterator == touchesByTarget.end()) { |
| touchesByTarget.set(touchInfo.touchTarget.get(), TouchList::create()); |
| targetTouchesIterator = touchesByTarget.find(touchInfo.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 && touchInfo.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(touchInfo.touchTarget); |
| } |
| } |
| if (allTouchReleased) { |
| m_touchSequenceDocument.clear(); |
| m_touchSequenceUserGestureToken.clear(); |
| } |
| |
| bool swallowedEvent = false; |
| |
| // Now iterate through the changedTouches list and m_targets within it, sending |
| // TouchEvents to the targets as required. |
| for (unsigned state = 0; state != PlatformTouchPoint::TouchStateEnd; ++state) { |
| if (!changedTouches[state].m_touches) |
| continue; |
| |
| const AtomicString& eventName(touchEventNameForTouchPointState(static_cast<PlatformTouchPoint::State>(state))); |
| const EventTargetSet& targetsForState = changedTouches[state].m_targets; |
| for (const RefPtrWillBeMember<EventTarget>& eventTarget : targetsForState) { |
| EventTarget* touchEventTarget = eventTarget.get(); |
| RefPtrWillBeRawPtr<TouchEvent> touchEvent = TouchEvent::create( |
| touches.get(), touchesByTarget.get(touchEventTarget), changedTouches[state].m_touches.get(), |
| eventName, touchEventTarget->toNode()->document().domWindow(), |
| event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(), |
| event.cancelable(), event.causesScrollingIfUncanceled(), event.timestamp()); |
| |
| touchEventTarget->dispatchEvent(touchEvent.get()); |
| swallowedEvent = swallowedEvent || touchEvent->defaultPrevented() || touchEvent->defaultHandled(); |
| } |
| } |
| |
| return swallowedEvent; |
| } |
| |
| bool EventHandler::handleTouchEvent(const PlatformTouchEvent& event) |
| { |
| TRACE_EVENT0("blink", "EventHandler::handleTouchEvent"); |
| |
| const Vector<PlatformTouchPoint>& points = event.touchPoints(); |
| |
| bool freshTouchEvents = true; |
| bool allTouchReleased = true; |
| for (unsigned 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 (unsigned i = 0; i < points.size(); ++i) { |
| const PlatformTouchPoint& point = points[i]; |
| |
| // Touch events implicitly capture to the touched node, and don't change |
| // active/hover states themselves (Gesture events do). So we only need |
| // to hit-test on touchstart, and it can be read-only. |
| if (point.state() == PlatformTouchPoint::TouchPressed) { |
| HitTestRequest::HitTestRequestType hitType = HitTestRequest::TouchEvent | HitTestRequest::ReadOnly | HitTestRequest::Active; |
| LayoutPoint pagePoint = roundedLayoutPoint(m_frame->view()->rootFrameToContents(point.pos())); |
| HitTestResult result; |
| if (!m_touchSequenceDocument) { |
| result = hitTestResultAtPoint(pagePoint, hitType); |
| } else if (m_touchSequenceDocument->frame()) { |
| LayoutPoint framePoint = roundedLayoutPoint(m_touchSequenceDocument->frame()->view()->rootFrameToContents(point.pos())); |
| result = hitTestResultInFrame(m_touchSequenceDocument->frame(), framePoint, hitType); |
| } else { |
| continue; |
| } |
| |
| Node* node = result.innerNode(); |
| if (!node) |
| continue; |
| |
| // Touch events should not go to text nodes |
| if (node->isTextNode()) |
| node = ComposedTreeTraversal::parent(*node); |
| |
| if (!m_touchSequenceDocument) { |
| // Keep track of which document should receive all touch events |
| // in the active sequence. This must be a single document to |
| // ensure we don't leak Nodes between documents. |
| m_touchSequenceDocument = &(result.innerNode()->document()); |
| ASSERT(m_touchSequenceDocument->frame()->view()); |
| } |
| |
| // Ideally we'd ASSERT(!m_targetForTouchID.contains(point.id()) |
| // since we shouldn't get a touchstart for a touch that's already |
| // down. However EventSender allows this to be violated and there's |
| // some tests that take advantage of it. There may also be edge |
| // cases in the browser where this happens. |
| // See http://crbug.com/345372. |
| m_targetForTouchID.set(point.id(), node); |
| |
| TouchAction effectiveTouchAction = TouchActionUtil::computeEffectiveTouchAction(*node); |
| if (effectiveTouchAction != TouchActionAuto) |
| m_frame->page()->chromeClient().setTouchAction(effectiveTouchAction); |
| } |
| } |
| |
| m_touchPressed = !allTouchReleased; |
| |
| // If there's no document receiving touch events, or no handlers on the |
| // document set to receive the events, then we can skip all the rest of |
| // this work. |
| if (!m_touchSequenceDocument || !m_touchSequenceDocument->frameHost() || !m_touchSequenceDocument->frameHost()->eventHandlerRegistry().hasEventHandlers(EventHandlerRegistry::TouchEvent) || !m_touchSequenceDocument->frame()) { |
| if (allTouchReleased) { |
| m_touchSequenceDocument.clear(); |
| m_touchSequenceUserGestureToken.clear(); |
| } |
| return false; |
| } |
| |
| // Compute and store the common info used by both PointerEvent and TouchEvent. |
| WillBeHeapVector<TouchInfo> touchInfos(points.size()); |
| |
| for (unsigned i = 0; i < points.size(); ++i) { |
| const PlatformTouchPoint& point = points[i]; |
| PlatformTouchPoint::State pointState = point.state(); |
| RefPtrWillBeRawPtr<EventTarget> touchTarget = nullptr; |
| |
| if (pointState == PlatformTouchPoint::TouchReleased || pointState == PlatformTouchPoint::TouchCancelled) { |
| // The target should be the original target for this touch, so get |
| // it from the hashmap. As it's a release or cancel we also remove |
| // it from the map. |
| touchTarget = m_targetForTouchID.take(point.id()); |
| } else { |
| // No hittest is performed on move or stationary, since the target |
| // is not allowed to change anyway. |
| touchTarget = m_targetForTouchID.get(point.id()); |
| } |
| |
| LocalFrame* targetFrame = nullptr; |
| bool knownTarget = false; |
| if (touchTarget) { |
| Document& doc = touchTarget->toNode()->document(); |
| // If the target node has moved to a new document while it was being touched, |
| // we can't send events to the new document because that could leak nodes |
| // from one document to another. See http://crbug.com/394339. |
| if (&doc == m_touchSequenceDocument.get()) { |
| targetFrame = doc.frame(); |
| knownTarget = true; |
| } |
| } |
| if (!knownTarget) { |
| // If we don't have a target registered for the point it means we've |
| // missed our opportunity to do a hit test for it (due to some |
| // optimization that prevented blink from ever seeing the |
| // touchstart), or that the touch started outside the active touch |
| // sequence document. We should still include the touch in the |
| // Touches list reported to the application (eg. so it can |
| // differentiate between a one and two finger gesture), but we won't |
| // actually dispatch any events for it. Set the target to the |
| // Document so that there's some valid node here. Perhaps this |
| // should really be LocalDOMWindow, but in all other cases the target of |
| // a Touch is a Node so using the window could be a breaking change. |
| // Since we know there was no handler invoked, the specific target |
| // should be completely irrelevant to the application. |
| touchTarget = m_touchSequenceDocument; |
| targetFrame = m_touchSequenceDocument->frame(); |
| } |
| ASSERT(targetFrame); |
| |
| // pagePoint should always be in the target element's document coordinates. |
| FloatPoint pagePoint = targetFrame->view()->rootFrameToContents(point.pos()); |
| float scaleFactor = 1.0f / targetFrame->pageZoomFactor(); |
| |
| TouchInfo& touchInfo = touchInfos[i]; |
| touchInfo.point = point; |
| touchInfo.touchTarget = touchTarget; |
| touchInfo.targetFrame = targetFrame; |
| touchInfo.adjustedPagePoint = pagePoint.scaledBy(scaleFactor); |
| touchInfo.adjustedRadius = point.radius().scaledBy(scaleFactor); |
| touchInfo.knownTarget = knownTarget; |
| touchInfo.consumed = false; |
| } |
| |
| if (RuntimeEnabledFeatures::pointerEventEnabled()) { |
| if (!m_inPointerCanceledState) { |
| dispatchPointerEventsForTouchEvent(event, touchInfos); |
| // Note that the disposition of any pointer events affects only the generation of touch |
| // events. If all pointer events were handled (and hence no touch events were fired), that |
| // is still equivalent to the touch events going unhandled because pointer event handler |
| // don't block scroll gesture generation. |
| } |
| } |
| |
| // TODO(crbug.com/507408): If PE handlers always call preventDefault, we won't see TEs until after |
| // scrolling starts because the scrolling would suppress upcoming PEs. This sudden "break" in TE |
| // suppression can make the visible TEs inconsistent (e.g. touchmove without a touchstart). |
| |
| bool swallowedTouchEvent = dispatchTouchEvents(event, touchInfos, freshTouchEvents, |
| allTouchReleased); |
| |
| if (RuntimeEnabledFeatures::pointerEventEnabled()) { |
| if (!m_inPointerCanceledState) { |
| // Check if we need to stop firing pointer events because of a touch action. |
| // See: www.w3.org/TR/pointerevents/#declaring-candidate-regions-for-default-touch-behaviors |
| if (event.causesScrollingIfUncanceled() && !swallowedTouchEvent) { |
| m_inPointerCanceledState = true; |
| sendPointerCancels(touchInfos); |
| } |
| } else if (allTouchReleased) { |
| m_inPointerCanceledState = false; |
| } |
| } |
| |
| return swallowedTouchEvent; |
| } |
| |
| void EventHandler::setLastKnownMousePosition(const PlatformMouseEvent& event) |
| { |
| m_mousePositionIsUnknown = false; |
| m_lastKnownMousePosition = event.position(); |
| m_lastKnownMouseGlobalPosition = event.globalPosition(); |
| } |
| |
| bool EventHandler::passMousePressEventToSubframe(MouseEventWithHitTestResults& mev, LocalFrame* subframe) |
| { |
| selectionController().passMousePressEventToSubframe(mev); |
| subframe->eventHandler().handleMousePressEvent(mev.event()); |
| return true; |
| } |
| |
| bool EventHandler::passMouseMoveEventToSubframe(MouseEventWithHitTestResults& mev, LocalFrame* subframe, HitTestResult* hoveredNode) |
| { |
| if (m_mouseDownMayStartDrag) |
| return false; |
| subframe->eventHandler().handleMouseMoveOrLeaveEvent(mev.event(), hoveredNode); |
| return true; |
| } |
| |
| bool EventHandler::passMouseReleaseEventToSubframe(MouseEventWithHitTestResults& mev, LocalFrame* subframe) |
| { |
| subframe->eventHandler().handleMouseReleaseEvent(mev.event()); |
| return true; |
| } |
| |
| bool EventHandler::passWheelEventToWidget(const PlatformWheelEvent& wheelEvent, Widget& widget) |
| { |
| // If not a FrameView, then probably a plugin widget. Those will receive |
| // the event via an EventTargetNode dispatch when this returns false. |
| if (!widget.isFrameView()) |
| return false; |
| |
| return toFrameView(&widget)->frame().eventHandler().handleWheelEvent(wheelEvent); |
| } |
| |
| DataTransfer* EventHandler::createDraggingDataTransfer() const |
| { |
| return DataTransfer::create(DataTransfer::DragAndDrop, DataTransferWritable, DataObject::create()); |
| } |
| |
| void EventHandler::focusDocumentView() |
| { |
| Page* page = m_frame->page(); |
| if (!page) |
| return; |
| page->focusController().focusDocumentView(m_frame); |
| } |
| |
| unsigned EventHandler::accessKeyModifiers() |
| { |
| #if OS(MACOSX) |
| return PlatformEvent::CtrlKey | PlatformEvent::AltKey; |
| #else |
| return PlatformEvent::AltKey; |
| #endif |
| } |
| |
| } // namespace blink |