| /* |
| * 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 "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/DOMNodeIds.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/TouchList.h" |
| #include "core/dom/shadow/FlatTreeTraversal.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/GestureEvent.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/Deprecation.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/UseCounter.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/layout/api/LayoutViewItem.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/TouchAdjustment.h" |
| #include "core/page/scrolling/ScrollState.h" |
| #include "core/paint/PaintLayer.h" |
| #include "core/style/ComputedStyle.h" |
| #include "core/style/CursorData.h" |
| #include "core/svg/SVGDocumentExtensions.h" |
| #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/ScrollAnimatorBase.h" |
| #include "platform/scroll/Scrollbar.h" |
| #include "wtf/Assertions.h" |
| #include "wtf/CurrentTime.h" |
| #include "wtf/PtrUtil.h" |
| #include "wtf/StdLibExtras.h" |
| #include "wtf/TemporaryChange.h" |
| #include <memory> |
| |
| namespace blink { |
| |
| namespace { |
| |
| // 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. |
| bool shouldRefetchEventTarget(const MouseEventWithHitTestResults& mev) |
| { |
| Node* targetNode = mev.innerNode(); |
| if (!targetNode || !targetNode->parentNode()) |
| return true; |
| return targetNode->isShadowRoot() && isHTMLInputElement(toShadowRoot(targetNode)->host()); |
| } |
| |
| } // namespace |
| |
| 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 |
| |
| 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; |
| }; |
| |
| EventHandler::EventHandler(LocalFrame* frame) |
| : m_frame(frame) |
| , m_mousePressed(false) |
| , m_capturesDragging(false) |
| , m_mouseDownMayStartDrag(false) |
| , m_selectionController(SelectionController::create(*frame)) |
| , m_hoverTimer(this, &EventHandler::hoverTimerFired) |
| , m_cursorUpdateTimer(this, &EventHandler::cursorUpdateTimerFired) |
| , m_mouseDownMayStartAutoscroll(false) |
| , m_fakeMouseMoveEventTimer(this, &EventHandler::fakeMouseMoveEventTimerFired) |
| , m_svgPan(false) |
| , m_eventHandlerWillResetCapturingMouseEventsNode(0) |
| , m_clickCount(0) |
| , m_shouldOnlyFireDragOverEvent(false) |
| , m_mousePositionIsUnknown(true) |
| , m_mouseDownTimestamp(0) |
| , m_pointerEventManager(frame) |
| , m_scrollManager(frame) |
| , m_keyboardEventManager(frame, &m_scrollManager) |
| , m_longTapShouldInvokeContextMenu(false) |
| , m_activeIntervalTimer(this, &EventHandler::activeIntervalTimerFired) |
| , m_lastShowPressTimestamp(0) |
| , m_suppressMouseEventsFromGestures(false) |
| { |
| } |
| |
| EventHandler::~EventHandler() |
| { |
| ASSERT(!m_fakeMouseMoveEventTimer.isActive()); |
| } |
| |
| DEFINE_TRACE(EventHandler) |
| { |
| visitor->trace(m_frame); |
| visitor->trace(m_mousePressNode); |
| visitor->trace(m_capturingMouseEventsNode); |
| visitor->trace(m_nodeUnderMouse); |
| visitor->trace(m_lastMouseMoveEventSubframe); |
| visitor->trace(m_lastScrollbarUnderMouse); |
| visitor->trace(m_clickNode); |
| visitor->trace(m_dragTarget); |
| visitor->trace(m_frameSetBeingResized); |
| visitor->trace(m_lastDeferredTapElement); |
| visitor->trace(m_selectionController); |
| visitor->trace(m_pointerEventManager); |
| visitor->trace(m_scrollManager); |
| visitor->trace(m_keyboardEventManager); |
| } |
| |
| DragState& EventHandler::dragState() |
| { |
| DEFINE_STATIC_LOCAL(DragState, state, (new DragState)); |
| return state; |
| } |
| |
| void EventHandler::clear() |
| { |
| m_hoverTimer.stop(); |
| m_cursorUpdateTimer.stop(); |
| m_fakeMouseMoveEventTimer.stop(); |
| m_activeIntervalTimer.stop(); |
| m_nodeUnderMouse = nullptr; |
| m_lastMouseMoveEventSubframe = nullptr; |
| m_lastScrollbarUnderMouse = nullptr; |
| m_clickCount = 0; |
| m_clickNode = nullptr; |
| m_frameSetBeingResized = nullptr; |
| m_dragTarget = nullptr; |
| m_shouldOnlyFireDragOverEvent = false; |
| m_mousePositionIsUnknown = true; |
| m_lastKnownMousePosition = IntPoint(); |
| m_lastKnownMouseGlobalPosition = IntPoint(); |
| m_lastMouseDownUserGestureToken.clear(); |
| m_mousePressNode = nullptr; |
| m_mousePressed = false; |
| m_capturesDragging = false; |
| m_capturingMouseEventsNode = nullptr; |
| m_pointerEventManager.clear(); |
| m_scrollManager.clear(); |
| m_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_mouseDown = PlatformMouseEvent(); |
| m_suppressMouseEventsFromGestures = false; |
| } |
| |
| WebInputEventResult EventHandler::mergeEventResult( |
| WebInputEventResult resultA, WebInputEventResult resultB) |
| { |
| // The ordering of the enumeration is specific. There are times that |
| // multiple events fire and we need to combine them into a single |
| // result code. The enumeration is based on the level of consumption that |
| // is most significant. The enumeration is ordered with smaller specified |
| // numbers first. Examples of merged results are: |
| // (HandledApplication, HandledSystem) -> HandledSystem |
| // (NotHandled, HandledApplication) -> HandledApplication |
| static_assert(static_cast<int>(WebInputEventResult::NotHandled) == 0, "WebInputEventResult not ordered"); |
| static_assert(static_cast<int>(WebInputEventResult::HandledSuppressed) < static_cast<int>(WebInputEventResult::HandledApplication), "WebInputEventResult not ordered"); |
| static_assert(static_cast<int>(WebInputEventResult::HandledApplication) < static_cast<int>(WebInputEventResult::HandledSystem), "WebInputEventResult not ordered"); |
| return static_cast<WebInputEventResult>(max(static_cast<int>(resultA), static_cast<int>(resultB))); |
| } |
| |
| WebInputEventResult EventHandler::toWebInputEventResult( |
| DispatchEventResult result) |
| { |
| switch (result) { |
| case DispatchEventResult::NotCanceled: |
| return WebInputEventResult::NotHandled; |
| case DispatchEventResult::CanceledByEventHandler: |
| return WebInputEventResult::HandledApplication; |
| case DispatchEventResult::CanceledByDefaultEventHandler: |
| return WebInputEventResult::HandledSystem; |
| case DispatchEventResult::CanceledBeforeDispatch: |
| return WebInputEventResult::HandledSuppressed; |
| default: |
| ASSERT_NOT_REACHED(); |
| return WebInputEventResult::HandledSystem; |
| } |
| } |
| |
| void EventHandler::nodeWillBeRemoved(Node& nodeToBeRemoved) |
| { |
| if (nodeToBeRemoved.isShadowIncludingInclusiveAncestorOf(m_clickNode.get())) { |
| // We don't dispatch click events if the mousedown node is removed |
| // before a mouseup event. It is compatible with IE and Firefox. |
| m_clickNode = nullptr; |
| } |
| } |
| |
| WebInputEventResult EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& event) |
| { |
| TRACE_EVENT0("blink", "EventHandler::handleMousePressEvent"); |
| |
| // Reset drag state. |
| dragState().m_dragSrc = nullptr; |
| |
| cancelFakeMouseMoveEvent(); |
| |
| m_frame->document()->updateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| if (FrameView* frameView = m_frame->view()) { |
| if (frameView->isPointInScrollbarCorner(event.event().position())) |
| return WebInputEventResult::NotHandled; |
| } |
| |
| bool singleClick = event.event().clickCount() <= 1; |
| |
| m_mouseDownMayStartDrag = singleClick && !isLinkSelection(event) && !isExtendingSelection(event); |
| |
| selectionController().handleMousePressEvent(event); |
| |
| m_mouseDown = event.event(); |
| |
| if (m_frame->document()->isSVGDocument() && m_frame->document()->accessSVGExtensions().zoomAndPanEnabled()) { |
| if (event.event().shiftKey() && singleClick) { |
| m_svgPan = true; |
| m_frame->document()->accessSVGExtensions().startPan(m_frame->view()->rootFrameToContents(event.event().position())); |
| return WebInputEventResult::HandledSystem; |
| } |
| } |
| |
| // We don't do this at the start of mouse down handling, |
| // because we don't want to do it until we know we didn't hit a widget. |
| if (singleClick) |
| focusDocumentView(); |
| |
| Node* innerNode = event.innerNode(); |
| |
| m_mousePressNode = innerNode; |
| m_frame->document()->setSequentialFocusNavigationStartingPoint(innerNode); |
| m_dragStartPos = event.event().position(); |
| |
| bool swallowEvent = false; |
| m_mousePressed = true; |
| |
| if (event.event().clickCount() == 2) |
| swallowEvent = selectionController().handleMousePressEventDoubleClick(event); |
| else if (event.event().clickCount() >= 3) |
| swallowEvent = selectionController().handleMousePressEventTripleClick(event); |
| else |
| swallowEvent = selectionController().handleMousePressEventSingleClick(event); |
| |
| m_mouseDownMayStartAutoscroll = selectionController().mouseDownMayStartSelect() |
| || (m_mousePressNode && m_mousePressNode->layoutBox() && m_mousePressNode->layoutBox()->canBeProgramaticallyScrolled()); |
| |
| return swallowEvent ? WebInputEventResult::HandledSystem : WebInputEventResult::NotHandled; |
| } |
| |
| WebInputEventResult EventHandler::handleMouseDraggedEvent(const MouseEventWithHitTestResults& event) |
| { |
| TRACE_EVENT0("blink", "EventHandler::handleMouseDraggedEvent"); |
| |
| // While resetting m_mousePressed here may seem out of place, it turns out |
| // to be needed to handle some bugs^Wfeatures in Blink mouse event handling: |
| // 1. Certain elements, such as <embed>, capture mouse events. They do not |
| // bubble back up. One way for a <embed> to start capturing mouse events |
| // is on a mouse press. The problem is the <embed> node only starts |
| // capturing mouse events *after* m_mousePressed for the containing frame |
| // has already been set to true. As a result, the frame's EventHandler |
| // never sees the mouse release event, which is supposed to reset |
| // m_mousePressed... so m_mousePressed ends up remaining true until the |
| // event handler finally gets another mouse released event. Oops. |
| // 2. Dragging doesn't start until after a mouse press event, but a drag |
| // that ends as a result of a mouse release does not send a mouse release |
| // event. As a result, m_mousePressed also ends up remaining true until |
| // the next mouse release event seen by the EventHandler. |
| if (event.event().button() != LeftButton) |
| m_mousePressed = false; |
| |
| if (!m_mousePressed) |
| return WebInputEventResult::NotHandled; |
| |
| if (handleDrag(event, DragInitiator::Mouse)) |
| return WebInputEventResult::HandledSystem; |
| |
| Node* targetNode = event.innerNode(); |
| if (!targetNode) |
| return WebInputEventResult::NotHandled; |
| |
| LayoutObject* layoutObject = targetNode->layoutObject(); |
| if (!layoutObject) { |
| Node* parent = FlatTreeTraversal::parent(*targetNode); |
| if (!parent) |
| return WebInputEventResult::NotHandled; |
| |
| layoutObject = parent->layoutObject(); |
| if (!layoutObject || !layoutObject->isListBox()) |
| return WebInputEventResult::NotHandled; |
| } |
| |
| m_mouseDownMayStartDrag = false; |
| |
| if (m_mouseDownMayStartAutoscroll && !m_scrollManager.panScrollInProgress()) { |
| if (AutoscrollController* controller = m_scrollManager.autoscrollController()) { |
| controller->startAutoscrollForSelection(layoutObject); |
| m_mouseDownMayStartAutoscroll = false; |
| } |
| } |
| |
| selectionController().handleMouseDraggedEvent(event, m_mouseDownPos, m_dragStartPos, m_mousePressNode.get(), m_lastKnownMousePosition); |
| return WebInputEventResult::HandledSystem; |
| } |
| |
| void EventHandler::updateSelectionForMouseDrag() |
| { |
| selectionController().updateSelectionForMouseDrag(m_mousePressNode.get(), m_dragStartPos, m_lastKnownMousePosition); |
| } |
| |
| WebInputEventResult EventHandler::handleMouseReleaseEvent(const MouseEventWithHitTestResults& event) |
| { |
| AutoscrollController* controller = m_scrollManager.autoscrollController(); |
| if (controller && controller->autoscrollInProgress()) |
| m_scrollManager.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) ? WebInputEventResult::HandledSystem : WebInputEventResult::NotHandled; |
| } |
| |
| #if OS(WIN) |
| |
| void EventHandler::startPanScrolling(LayoutObject* layoutObject) |
| { |
| if (!layoutObject->isBox()) |
| return; |
| AutoscrollController* controller = m_scrollManager.autoscrollController(); |
| if (!controller) |
| return; |
| controller->startPanScrolling(toLayoutBox(layoutObject), lastKnownMousePosition()); |
| invalidateClick(); |
| } |
| |
| #endif // OS(WIN) |
| |
| 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->contentLayoutItem().isNull() || !m_frame->view() || !m_frame->view()->didFirstLayout()) |
| return result; |
| |
| m_frame->contentLayoutItem().hitTest(result); |
| if (!request.readOnly()) |
| m_frame->document()->updateHoverActiveState(request, result.innerElement()); |
| |
| return result; |
| } |
| |
| void EventHandler::stopAutoscroll() |
| { |
| m_scrollManager.stopAutoscroll(); |
| } |
| |
| // TODO(bokan): This should be merged with logicalScroll assuming |
| // defaultSpaceEventHandler's chaining scroll can be done crossing frames. |
| bool EventHandler::bubblingScroll(ScrollDirection direction, ScrollGranularity granularity, Node* startingNode) |
| { |
| return m_scrollManager.bubblingScroll(direction, granularity, startingNode, m_mousePressNode); |
| } |
| |
| IntPoint EventHandler::lastKnownMousePosition() const |
| { |
| return m_lastKnownMousePosition; |
| } |
| |
| IntPoint EventHandler::dragDataTransferLocationForTesting() |
| { |
| if (dragState().m_dragDataTransfer) |
| return dragState().m_dragDataTransfer->dragLocation(); |
| |
| return IntPoint(); |
| } |
| |
| 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; |
| |
| LayoutViewItem layoutViewItem = view->layoutViewItem(); |
| if (layoutViewItem.isNull()) |
| return; |
| |
| m_frame->document()->updateStyleAndLayout(); |
| |
| HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::AllowChildFrameContent); |
| HitTestResult result(request, view->rootFrameToContents(m_lastKnownMousePosition)); |
| layoutViewItem.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_scrollManager.inResizeMode()) |
| return NoCursorChange; |
| |
| Page* page = m_frame->page(); |
| if (!page) |
| return NoCursorChange; |
| if (m_scrollManager.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->getImage()->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->getImage(); |
| // 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()); |
| |
| const bool isOverLink = !selectionController().mouseDownMayStartSelect() && result.isOverLink(); |
| if (useHandCursor(node, isOverLink)) |
| return handCursor(); |
| |
| bool inResizer = false; |
| LayoutObject* layoutObject = node ? node->layoutObject() : nullptr; |
| if (layoutObject && m_frame->view()) { |
| PaintLayer* layer = layoutObject->enclosingLayer(); |
| inResizer = layer->getScrollableArea() && layer->getScrollableArea()->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().isNone() |
| && !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; |
| } |
| |
| WebInputEventResult EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent) |
| { |
| TRACE_EVENT0("blink", "EventHandler::handleMousePressEvent"); |
| |
| // For 4th/5th button in the mouse since Chrome does not yet send |
| // button value to Blink but in some cases it does send the event. |
| // This check is needed to suppress such an event (crbug.com/574959) |
| if (mouseEvent.button() == NoButton) |
| return WebInputEventResult::HandledSuppressed; |
| |
| UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture); |
| m_frame->localFrameRoot()->eventHandler().m_lastMouseDownUserGestureToken = UserGestureIndicator::currentToken(); |
| |
| cancelFakeMouseMoveEvent(); |
| if (m_eventHandlerWillResetCapturingMouseEventsNode) |
| m_capturingMouseEventsNode = nullptr; |
| m_mousePressed = true; |
| m_capturesDragging = true; |
| setLastKnownMousePosition(mouseEvent); |
| m_mouseDownTimestamp = mouseEvent.timestamp(); |
| m_mouseDownMayStartDrag = false; |
| selectionController().setMouseDownMayStartSelect(false); |
| m_mouseDownMayStartAutoscroll = false; |
| if (FrameView* view = m_frame->view()) { |
| m_mouseDownPos = view->rootFrameToContents(mouseEvent.position()); |
| } else { |
| invalidateClick(); |
| return WebInputEventResult::NotHandled; |
| } |
| |
| HitTestRequest request(HitTestRequest::Active); |
| // Save the document point we generate in case the window coordinate is invalidated by what happens |
| // when we dispatch the event. |
| LayoutPoint documentPoint = contentPointFromRootFrame(m_frame, mouseEvent.position()); |
| MouseEventWithHitTestResults mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent); |
| |
| if (!mev.innerNode()) { |
| invalidateClick(); |
| return WebInputEventResult::NotHandled; |
| } |
| |
| m_mousePressNode = mev.innerNode(); |
| m_frame->document()->setSequentialFocusNavigationStartingPoint(mev.innerNode()); |
| |
| LocalFrame* subframe = subframeForHitTestResult(mev); |
| if (subframe) { |
| WebInputEventResult result = passMousePressEventToSubframe(mev, subframe); |
| // 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. |
| // The capturing should be done only when the result indicates it |
| // has been handled. See crbug.com/269917 |
| m_capturesDragging = subframe->eventHandler().capturesDragging(); |
| if (m_mousePressed && m_capturesDragging) { |
| m_capturingMouseEventsNode = mev.innerNode(); |
| m_eventHandlerWillResetCapturingMouseEventsNode = true; |
| } |
| invalidateClick(); |
| return result; |
| } |
| |
| #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 = m_scrollManager.panScrollInProgress(); |
| m_scrollManager.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 WebInputEventResult::HandledSuppressed; |
| } |
| #endif |
| |
| m_clickCount = mouseEvent.clickCount(); |
| m_clickNode = mev.innerNode()->isTextNode() ? FlatTreeTraversal::parent(*mev.innerNode()) : mev.innerNode(); |
| |
| if (!mouseEvent.fromTouch()) |
| m_frame->selection().setCaretBlinkingSuspended(true); |
| |
| WebInputEventResult eventResult = updatePointerTargetAndDispatchEvents(EventTypeNames::mousedown, mev.innerNode(), m_clickCount, mev.event()); |
| |
| if (eventResult == WebInputEventResult::NotHandled && m_frame->view()) { |
| FrameView* view = m_frame->view(); |
| PaintLayer* layer = mev.innerNode()->layoutObject() ? mev.innerNode()->layoutObject()->enclosingLayer() : nullptr; |
| IntPoint p = view->rootFrameToContents(mouseEvent.position()); |
| if (layer && layer->getScrollableArea() && layer->getScrollableArea()->isPointInResizeControl(p, ResizerForPointer)) { |
| m_scrollManager.setResizeScrollableArea(layer, p); |
| return WebInputEventResult::HandledSystem; |
| } |
| } |
| |
| // 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, documentPoint, HitTestRequest::ReadOnly); |
| InputDeviceCapabilities* sourceCapabilities = mouseEvent.getSyntheticEventType() == PlatformMouseEvent::FromTouch ? InputDeviceCapabilities::firesTouchEventsSourceCapabilities() : |
| InputDeviceCapabilities::doesntFireTouchEventsSourceCapabilities(); |
| if (eventResult == WebInputEventResult::NotHandled) |
| eventResult = handleMouseFocus(MouseEventWithHitTestResults(mev.event(), hitTestResult), sourceCapabilities); |
| m_capturesDragging = eventResult == WebInputEventResult::NotHandled || mev.scrollbar(); |
| |
| // If the hit testing originally determined the event was in a scrollbar, refetch the MouseEventWithHitTestResults |
| // in case the scrollbar widget was destroyed when the mouse event was handled. |
| if (mev.scrollbar()) { |
| const bool wasLastScrollBar = mev.scrollbar() == m_lastScrollbarUnderMouse.get(); |
| HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active); |
| mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent); |
| if (wasLastScrollBar && mev.scrollbar() != m_lastScrollbarUnderMouse.get()) |
| m_lastScrollbarUnderMouse = nullptr; |
| } |
| |
| if (eventResult != WebInputEventResult::NotHandled) { |
| // 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)) |
| eventResult = WebInputEventResult::HandledSystem; |
| else |
| eventResult = 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 eventResult; |
| } |
| |
| static PaintLayer* layerForNode(Node* node) |
| { |
| if (!node) |
| return nullptr; |
| |
| LayoutObject* layoutObject = node->layoutObject(); |
| if (!layoutObject) |
| return nullptr; |
| |
| PaintLayer* layer = layoutObject->enclosingLayer(); |
| if (!layer) |
| return nullptr; |
| |
| return layer; |
| } |
| |
| ScrollableArea* EventHandler::associatedScrollableArea(const PaintLayer* layer) const |
| { |
| if (PaintLayerScrollableArea* scrollableArea = layer->getScrollableArea()) { |
| if (scrollableArea->scrollsOverflow()) |
| return scrollableArea; |
| } |
| |
| return nullptr; |
| } |
| |
| WebInputEventResult EventHandler::handleMouseMoveEvent(const PlatformMouseEvent& event) |
| { |
| TRACE_EVENT0("blink", "EventHandler::handleMouseMoveEvent"); |
| |
| HitTestResult hoveredNode = HitTestResult(); |
| WebInputEventResult result = handleMouseMoveOrLeaveEvent(event, &hoveredNode); |
| |
| Page* page = m_frame->page(); |
| if (!page) |
| return result; |
| |
| if (PaintLayer* 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"); |
| |
| handleMouseMoveOrLeaveEvent(event, 0, false, true); |
| } |
| |
| WebInputEventResult 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 WebInputEventResult::HandledSuppressed; |
| } |
| |
| if (m_frameSetBeingResized) |
| return updatePointerTargetAndDispatchEvents(EventTypeNames::mousemove, m_frameSetBeingResized.get(), 0, mouseEvent); |
| |
| // Send events right to a scrollbar if the mouse is pressed. |
| if (m_lastScrollbarUnderMouse && m_mousePressed) { |
| m_lastScrollbarUnderMouse->mouseMoved(mouseEvent); |
| return WebInputEventResult::HandledSystem; |
| } |
| |
| // 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_pointerEventManager.isAnyTouchActive()) |
| 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_scrollManager.inResizeMode()) { |
| m_scrollManager.resize(mev.event()); |
| } else { |
| if (!scrollbar) |
| scrollbar = mev.scrollbar(); |
| |
| updateLastScrollbarUnderMouse(scrollbar, !m_mousePressed); |
| if (onlyUpdateScrollbars) |
| return WebInputEventResult::HandledSuppressed; |
| } |
| |
| WebInputEventResult eventResult = WebInputEventResult::NotHandled; |
| 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(mev.event()); |
| |
| if (newSubframe) { |
| // Update over/out state before passing the event to the subframe. |
| updateMouseEventTargetNodeAndSendEvents(mev.innerNode(), mev.event(), true); |
| |
| // Event dispatch in updateMouseEventTargetNodeAndSendEvents may have caused the subframe of the target |
| // node to be detached from its FrameView, in which case the event should not be passed. |
| if (newSubframe->view()) |
| eventResult = passMouseMoveEventToSubframe(mev, newSubframe, hoveredNode); |
| } else { |
| if (scrollbar && !m_mousePressed) |
| scrollbar->mouseMoved(mev.event()); // Handle hover effects on platforms that support visual feedback on scrollbar hovering. |
| if (FrameView* view = m_frame->view()) { |
| OptionalCursor optionalCursor = selectCursor(mev.hitTestResult()); |
| if (optionalCursor.isCursorChange()) { |
| view->setCursor(optionalCursor.cursor()); |
| } |
| } |
| } |
| |
| m_lastMouseMoveEventSubframe = newSubframe; |
| |
| if (eventResult != WebInputEventResult::NotHandled) |
| return eventResult; |
| |
| eventResult = updatePointerTargetAndDispatchEvents(EventTypeNames::mousemove, mev.innerNode(), 0, mev.event()); |
| if (eventResult != WebInputEventResult::NotHandled) |
| return eventResult; |
| |
| return handleMouseDraggedEvent(mev); |
| } |
| |
| 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 FlatTreeTraversal::parent(node); |
| } |
| |
| WebInputEventResult EventHandler::handleMouseReleaseEvent(const PlatformMouseEvent& mouseEvent) |
| { |
| TRACE_EVENT0("blink", "EventHandler::handleMouseReleaseEvent"); |
| |
| // For 4th/5th button in the mouse since Chrome does not yet send |
| // button value to Blink but in some cases it does send the event. |
| // This check is needed to suppress such an event (crbug.com/574959) |
| if (mouseEvent.button() == NoButton) |
| return WebInputEventResult::HandledSuppressed; |
| |
| if (!mouseEvent.fromTouch()) |
| m_frame->selection().setCaretBlinkingSuspended(false); |
| |
| std::unique_ptr<UserGestureIndicator> gestureIndicator; |
| |
| if (m_frame->localFrameRoot()->eventHandler().m_lastMouseDownUserGestureToken) |
| gestureIndicator = wrapUnique(new UserGestureIndicator(m_frame->localFrameRoot()->eventHandler().m_lastMouseDownUserGestureToken.release())); |
| else |
| gestureIndicator = wrapUnique(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 WebInputEventResult::HandledSuppressed; |
| } |
| |
| if (m_frameSetBeingResized) |
| return dispatchMouseEvent(EventTypeNames::mouseup, m_frameSetBeingResized.get(), m_clickCount, mouseEvent); |
| |
| if (m_lastScrollbarUnderMouse) { |
| invalidateClick(); |
| m_lastScrollbarUnderMouse->mouseUp(mouseEvent); |
| return updatePointerTargetAndDispatchEvents(EventTypeNames::mouseup, m_nodeUnderMouse.get(), m_clickCount, mouseEvent); |
| } |
| |
| // 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) |
| return passMouseReleaseEventToSubframe(mev, subframe); |
| |
| WebInputEventResult eventResult = updatePointerTargetAndDispatchEvents(EventTypeNames::mouseup, mev.innerNode(), m_clickCount, mev.event()); |
| |
| 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.getModifiers() & PlatformEvent::CtrlKey) |
| contextMenuEvent = true; |
| #endif |
| |
| WebInputEventResult clickEventResult = WebInputEventResult::NotHandled; |
| const bool shouldDispatchClickEvent = m_clickCount > 0 |
| && !contextMenuEvent |
| && mev.innerNode() && m_clickNode |
| && mev.innerNode()->canParticipateInFlatTree() && m_clickNode->canParticipateInFlatTree() |
| && !(selectionController().hasExtendedSelection() && isLinkSelection(mev)); |
| if (shouldDispatchClickEvent) { |
| Node* clickTargetNode = nullptr; |
| // Updates distribution because a 'mouseup' event listener can make the |
| // tree dirty at dispatchMouseEvent() invocation above. |
| // Unless distribution is updated, commonAncestor would hit ASSERT. |
| if (m_clickNode == mev.innerNode()) { |
| clickTargetNode = m_clickNode; |
| clickTargetNode->updateDistribution(); |
| } else if (m_clickNode->document() == mev.innerNode()->document()) { |
| m_clickNode->updateDistribution(); |
| mev.innerNode()->updateDistribution(); |
| clickTargetNode = mev.innerNode()->commonAncestor( |
| *m_clickNode, parentForClickEvent); |
| } |
| if (clickTargetNode) { |
| // Dispatch mouseup directly w/o calling updateMouseEventTargetNodeAndSendEvents |
| // because the mouseup dispatch above has already updated it |
| // correctly. Moreover, clickTargetNode is different from |
| // mev.innerNode at drag-release. |
| clickEventResult = toWebInputEventResult(clickTargetNode->dispatchMouseEvent(mev.event(), |
| EventTypeNames::click, m_clickCount)); |
| } |
| } |
| |
| m_scrollManager.clearResizeScrollableArea(false); |
| |
| if (eventResult == WebInputEventResult::NotHandled) |
| eventResult = handleMouseReleaseEvent(mev); |
| |
| invalidateClick(); |
| |
| return mergeEventResult(clickEventResult, eventResult); |
| } |
| |
| WebInputEventResult EventHandler::dispatchDragEvent(const AtomicString& eventType, Node* dragTarget, const PlatformMouseEvent& event, DataTransfer* dataTransfer) |
| { |
| FrameView* view = m_frame->view(); |
| |
| // FIXME: We might want to dispatch a dragleave even if the view is gone. |
| if (!view) |
| return WebInputEventResult::NotHandled; |
| |
| DragEvent* me = DragEvent::create(eventType, |
| true, true, m_frame->document()->domWindow(), |
| 0, event.globalPosition().x(), event.globalPosition().y(), event.position().x(), event.position().y(), |
| event.movementDelta().x(), event.movementDelta().y(), |
| event.getModifiers(), |
| 0, MouseEvent::platformModifiersToButtons(event.getModifiers()), nullptr, event.timestamp(), dataTransfer, event.getSyntheticEventType()); |
| |
| return toWebInputEventResult(dragTarget->dispatchEvent(me)); |
| } |
| |
| 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].getString()); |
| } |
| |
| if (matched && dragOperation != DragOperationNone) |
| break; |
| } |
| if (matched) { |
| dataTransfer->setDropEffect(convertDragOperationToDropZoneOperation(dragOperation)); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| WebInputEventResult EventHandler::updateDragAndDrop(const PlatformMouseEvent& event, DataTransfer* dataTransfer) |
| { |
| WebInputEventResult eventResult = WebInputEventResult::NotHandled; |
| |
| if (!m_frame->view()) |
| return eventResult; |
| |
| HitTestRequest request(HitTestRequest::ReadOnly); |
| MouseEventWithHitTestResults mev = prepareMouseEvent(request, event); |
| |
| // Drag events should never go to text nodes (following IE, and proper mouseover/out dispatch) |
| Node* newTarget = mev.innerNode(); |
| if (newTarget && newTarget->isTextNode()) |
| newTarget = FlatTreeTraversal::parent(*newTarget); |
| |
| if (AutoscrollController* controller = m_scrollManager.autoscrollController()) |
| controller->updateDragAndDrop(newTarget, 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, targetFrame)) { |
| if (targetFrame) |
| eventResult = targetFrame->eventHandler().updateDragAndDrop(event, dataTransfer); |
| } else if (newTarget) { |
| // As per section 7.9.4 of the HTML 5 spec., we must always fire a drag event before firing a dragenter, dragleave, or dragover event. |
| if (dragState().m_dragSrc) { |
| // for now we don't care if event handler cancels default behavior, since there is none |
| dispatchDragSrcEvent(EventTypeNames::drag, event); |
| } |
| eventResult = dispatchDragEvent(EventTypeNames::dragenter, newTarget, event, dataTransfer); |
| if (eventResult == WebInputEventResult::NotHandled && findDropZone(newTarget, dataTransfer)) |
| eventResult = WebInputEventResult::HandledSystem; |
| } |
| |
| if (targetIsFrame(m_dragTarget.get(), targetFrame)) { |
| if (targetFrame) |
| eventResult = 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, targetFrame)) { |
| if (targetFrame) |
| eventResult = targetFrame->eventHandler().updateDragAndDrop(event, dataTransfer); |
| } else if (newTarget) { |
| // Note, when dealing with sub-frames, we may need to fire only a dragover event as a drag event may have been fired earlier. |
| if (!m_shouldOnlyFireDragOverEvent && dragState().m_dragSrc) { |
| // for now we don't care if event handler cancels default behavior, since there is none |
| dispatchDragSrcEvent(EventTypeNames::drag, event); |
| } |
| eventResult = dispatchDragEvent(EventTypeNames::dragover, newTarget, event, dataTransfer); |
| if (eventResult == WebInputEventResult::NotHandled && findDropZone(newTarget, dataTransfer)) |
| eventResult = WebInputEventResult::HandledSystem; |
| m_shouldOnlyFireDragOverEvent = false; |
| } |
| } |
| m_dragTarget = newTarget; |
| |
| return eventResult; |
| } |
| |
| 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(); |
| } |
| |
| WebInputEventResult EventHandler::performDragAndDrop(const PlatformMouseEvent& event, DataTransfer* dataTransfer) |
| { |
| LocalFrame* targetFrame; |
| WebInputEventResult result = WebInputEventResult::NotHandled; |
| if (targetIsFrame(m_dragTarget.get(), targetFrame)) { |
| if (targetFrame) |
| result = targetFrame->eventHandler().performDragAndDrop(event, dataTransfer); |
| } else if (m_dragTarget.get()) { |
| result = dispatchDragEvent(EventTypeNames::drop, m_dragTarget.get(), event, dataTransfer); |
| } |
| clearDragState(); |
| return result; |
| } |
| |
| void EventHandler::clearDragState() |
| { |
| m_scrollManager.stopAutoscroll(); |
| m_dragTarget = nullptr; |
| m_capturingMouseEventsNode = nullptr; |
| m_shouldOnlyFireDragOverEvent = false; |
| } |
| |
| void EventHandler::setCapturingMouseEventsNode(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); |
| } |
| |
| Node* EventHandler::updateMouseEventTargetNode(Node* targetNode, |
| const PlatformMouseEvent& mouseEvent) |
| { |
| 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 = FlatTreeTraversal::parent(*result); |
| } |
| Node* lastNodeUnderMouse = m_nodeUnderMouse; |
| m_nodeUnderMouse = result; |
| |
| PaintLayer* layerForLastNode = layerForNode(lastNodeUnderMouse); |
| PaintLayer* layerForNodeUnderMouse = layerForNode(m_nodeUnderMouse.get()); |
| Page* page = m_frame->page(); |
| |
| if (lastNodeUnderMouse && (!m_nodeUnderMouse || m_nodeUnderMouse->document() != m_frame->document())) { |
| // The mouse has moved between frames. |
| if (LocalFrame* frame = lastNodeUnderMouse->document().frame()) { |
| if (FrameView* frameView = frame->view()) |
| frameView->mouseExitedContentArea(); |
| } |
| } else if (page && (layerForLastNode && (!layerForNodeUnderMouse || layerForNodeUnderMouse != layerForLastNode))) { |
| // The mouse has moved between layers. |
| if (ScrollableArea* scrollableAreaForLastNode = associatedScrollableArea(layerForLastNode)) |
| scrollableAreaForLastNode->mouseExitedContentArea(); |
| } |
| |
| if (m_nodeUnderMouse && (!lastNodeUnderMouse || lastNodeUnderMouse->document() != m_frame->document())) { |
| // The mouse has moved between frames. |
| if (LocalFrame* frame = m_nodeUnderMouse->document().frame()) { |
| if (FrameView* frameView = frame->view()) |
| frameView->mouseEnteredContentArea(); |
| } |
| } else if (page && (layerForNodeUnderMouse && (!layerForLastNode || layerForNodeUnderMouse != layerForLastNode))) { |
| // The mouse has moved between layers. |
| if (ScrollableArea* scrollableAreaForNodeUnderMouse = associatedScrollableArea(layerForNodeUnderMouse)) |
| scrollableAreaForNodeUnderMouse->mouseEnteredContentArea(); |
| } |
| |
| if (lastNodeUnderMouse && lastNodeUnderMouse->document() != m_frame->document()) { |
| lastNodeUnderMouse = nullptr; |
| m_lastScrollbarUnderMouse = nullptr; |
| } |
| |
| return lastNodeUnderMouse; |
| } |
| |
| void EventHandler::updateMouseEventTargetNodeAndSendEvents(Node* targetNode, |
| const PlatformMouseEvent& mouseEvent, bool isFrameBoundaryTransition) |
| { |
| Node* lastNodeUnderMouse = updateMouseEventTargetNode(targetNode, mouseEvent); |
| m_pointerEventManager.sendMouseAndPossiblyPointerBoundaryEvents( |
| lastNodeUnderMouse, m_nodeUnderMouse, mouseEvent, |
| isFrameBoundaryTransition); |
| } |
| |
| WebInputEventResult EventHandler::dispatchMouseEvent(const AtomicString& eventType, Node* targetNode, int clickCount, const PlatformMouseEvent& mouseEvent) |
| { |
| updateMouseEventTargetNodeAndSendEvents(targetNode, mouseEvent); |
| if (!m_nodeUnderMouse) |
| return WebInputEventResult::NotHandled; |
| |
| MouseEvent* event = MouseEvent::create(eventType, m_nodeUnderMouse->document().domWindow(), mouseEvent, clickCount, nullptr); |
| return toWebInputEventResult(m_nodeUnderMouse->dispatchEvent(event)); |
| } |
| |
| bool EventHandler::isPointerEventActive(int pointerId) |
| { |
| return m_pointerEventManager.isActive(pointerId); |
| } |
| |
| void EventHandler::setPointerCapture(int pointerId, EventTarget* target) |
| { |
| // TODO(crbug.com/591387): This functionality should be per page not per frame. |
| m_pointerEventManager.setPointerCapture(pointerId, target); |
| } |
| |
| void EventHandler::releasePointerCapture(int pointerId, EventTarget* target) |
| { |
| m_pointerEventManager.releasePointerCapture(pointerId, target); |
| } |
| |
| void EventHandler::elementRemoved(EventTarget* target) |
| { |
| m_pointerEventManager.elementRemoved(target); |
| } |
| |
| // TODO(mustaq): Make PE drive ME dispatch & bookkeeping in EventHandler. |
| WebInputEventResult EventHandler::updatePointerTargetAndDispatchEvents(const AtomicString& mouseEventType, Node* targetNode, int clickCount, const PlatformMouseEvent& mouseEvent) |
| { |
| ASSERT(mouseEventType == EventTypeNames::mousedown |
| || mouseEventType == EventTypeNames::mousemove |
| || mouseEventType == EventTypeNames::mouseup); |
| |
| Node* lastNodeUnderMouse = updateMouseEventTargetNode(targetNode, mouseEvent); |
| |
| return m_pointerEventManager.sendMousePointerEvent( |
| m_nodeUnderMouse, mouseEventType, clickCount, mouseEvent, nullptr, |
| lastNodeUnderMouse); |
| } |
| |
| WebInputEventResult EventHandler::handleMouseFocus(const MouseEventWithHitTestResults& targetedEvent, InputDeviceCapabilities* sourceCapabilities) |
| { |
| // If clicking on a frame scrollbar, do not mess up with content focus. |
| if (targetedEvent.hitTestResult().scrollbar() && !m_frame->contentLayoutItem().isNull()) { |
| if (targetedEvent.hitTestResult().scrollbar()->getScrollableArea() == m_frame->contentLayoutItem().getScrollableArea()) |
| return WebInputEventResult::NotHandled; |
| } |
| |
| // The layout needs to be up to date to determine if an element is focusable. |
| m_frame->document()->updateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| Element* element = nullptr; |
| if (m_nodeUnderMouse) |
| element = m_nodeUnderMouse->isElementNode() ? toElement(m_nodeUnderMouse) : m_nodeUnderMouse->parentOrShadowHostElement(); |
| for (; element; element = element->parentOrShadowHostElement()) { |
| if (element->isFocusable() && element->isFocusedElementInDocument()) |
| return WebInputEventResult::NotHandled; |
| if (element->isMouseFocusable()) |
| break; |
| } |
| ASSERT(!element || element->isMouseFocusable()); |
| |
| // To fix <rdar://problem/4895428> Can't drag selected ToDo, we don't focus |
| // a node on mouse down if it's selected and inside a focused node. It will |
| // be focused if the user does a mouseup over it, however, because the |
| // mouseup will set a selection inside it, which will call |
| // FrameSelection::setFocusedNodeIfNeeded. |
| if (element && m_frame->selection().isRange()) { |
| // TODO(yosin) We should not create |Range| object for calling |
| // |isNodeFullyContained()|. |
| if (createRange(m_frame->selection().selection().toNormalizedEphemeralRange())->isNodeFullyContained(*element) |
| && element->isDescendantOf(m_frame->document()->focusedElement())) |
| return WebInputEventResult::NotHandled; |
| } |
| |
| |
| // Only change the focus when clicking scrollbars if it can transfered to a |
| // mouse focusable node. |
| if (!element && targetedEvent.hitTestResult().scrollbar()) |
| return WebInputEventResult::HandledSystem; |
| |
| if (Page* page = m_frame->page()) { |
| // If focus shift is blocked, we eat the event. Note we should never |
| // clear swallowEvent if the page already set it (e.g., by canceling |
| // default behavior). |
| if (element) { |
| if (slideFocusOnShadowHostIfNecessary(*element)) |
| return WebInputEventResult::HandledSystem; |
| if (!page->focusController().setFocusedElement(element, m_frame, FocusParams(SelectionBehaviorOnFocus::None, WebFocusTypeMouse, sourceCapabilities))) |
| return WebInputEventResult::HandledSystem; |
| } else { |
| // We call setFocusedElement even with !element in order to blur |
| // current focus element when a link is clicked; this is expected by |
| // some sites that rely on onChange handlers running from form |
| // fields before the button click is processed. |
| if (!page->focusController().setFocusedElement(nullptr, m_frame, FocusParams(SelectionBehaviorOnFocus::None, WebFocusTypeNone, sourceCapabilities))) |
| return WebInputEventResult::HandledSystem; |
| } |
| } |
| |
| return WebInputEventResult::NotHandled; |
| } |
| |
| bool EventHandler::slideFocusOnShadowHostIfNecessary(const Element& element) |
| { |
| if (element.authorShadowRoot() && element.authorShadowRoot()->delegatesFocus()) { |
| Document* doc = m_frame->document(); |
| if (element.isShadowIncludingInclusiveAncestorOf(doc->focusedElement())) { |
| // If the inner element is already focused, do nothing. |
| return true; |
| } |
| |
| // If the host has a focusable inner element, focus it. Otherwise, the host takes focus. |
| Page* page = m_frame->page(); |
| ASSERT(page); |
| Element* found = page->focusController().findFocusableElementInShadowHost(element); |
| if (found && element.isShadowIncludingInclusiveAncestorOf(found)) { |
| // Use WebFocusTypeForward instead of WebFocusTypeMouse here to mean the focus has slided. |
| found->focus(FocusParams(SelectionBehaviorOnFocus::Reset, WebFocusTypeForward, nullptr)); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| WebInputEventResult EventHandler::handleWheelEvent(const PlatformWheelEvent& event) |
| { |
| Document* doc = m_frame->document(); |
| |
| if (doc->layoutViewItem().isNull()) |
| return WebInputEventResult::NotHandled; |
| |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return WebInputEventResult::NotHandled; |
| |
| LayoutPoint vPoint = view->rootFrameToContents(event.position()); |
| |
| HitTestRequest request(HitTestRequest::ReadOnly); |
| HitTestResult result(request, vPoint); |
| doc->layoutViewItem().hitTest(result); |
| |
| Node* node = result.innerNode(); |
| // Wheel events should not dispatch to text nodes. |
| if (node && node->isTextNode()) |
| node = FlatTreeTraversal::parent(*node); |
| |
| // If we're over the frame scrollbar, scroll the document. |
| if (!node && result.scrollbar()) |
| node = doc->documentElement(); |
| |
| LocalFrame* subframe = subframeForTargetNode(node); |
| if (subframe) { |
| WebInputEventResult result = subframe->eventHandler().handleWheelEvent(event); |
| if (result != WebInputEventResult::NotHandled) |
| m_scrollManager.setFrameWasScrolledByUser(); |
| return result; |
| } |
| |
| if (node) { |
| WheelEvent* domEvent = WheelEvent::create(event, node->document().domWindow()); |
| DispatchEventResult domEventResult = node->dispatchEvent(domEvent); |
| if (domEventResult != DispatchEventResult::NotCanceled) |
| return toWebInputEventResult(domEventResult); |
| } |
| |
| return WebInputEventResult::NotHandled; |
| } |
| |
| WebInputEventResult EventHandler::handleGestureShowPress() |
| { |
| m_lastShowPressTimestamp = WTF::monotonicallyIncreasingTime(); |
| |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return WebInputEventResult::NotHandled; |
| if (ScrollAnimatorBase* scrollAnimator = view->existingScrollAnimator()) |
| scrollAnimator->cancelAnimation(); |
| const FrameView::ScrollableAreaSet* areas = view->scrollableAreas(); |
| if (!areas) |
| return WebInputEventResult::NotHandled; |
| for (const ScrollableArea* scrollableArea : *areas) { |
| ScrollAnimatorBase* animator = scrollableArea->existingScrollAnimator(); |
| if (animator) |
| animator->cancelAnimation(); |
| } |
| return WebInputEventResult::NotHandled; |
| } |
| |
| WebInputEventResult 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); |
| } |
| |
| WebInputEventResult 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); |
| } |
| |
| WebInputEventResult EventHandler::handleGestureEventInFrame(const GestureEventWithHitTestResults& targetedEvent) |
| { |
| ASSERT(!targetedEvent.event().isScrollEvent()); |
| |
| Node* eventTarget = targetedEvent.hitTestResult().innerNode(); |
| const PlatformGestureEvent& gestureEvent = targetedEvent.event(); |
| |
| if (m_scrollManager.canHandleGestureEvent(targetedEvent)) |
| return WebInputEventResult::HandledSuppressed; |
| |
| if (eventTarget) { |
| GestureEvent* gestureDomEvent = GestureEvent::create(eventTarget->document().domWindow(), gestureEvent); |
| if (gestureDomEvent) { |
| DispatchEventResult gestureDomEventResult = eventTarget->dispatchEvent(gestureDomEvent); |
| if (gestureDomEventResult != DispatchEventResult::NotCanceled) { |
| ASSERT(gestureDomEventResult != DispatchEventResult::CanceledByEventHandler); |
| return toWebInputEventResult(gestureDomEventResult); |
| } |
| } |
| } |
| |
| switch (gestureEvent.type()) { |
| case PlatformEvent::GestureTapDown: |
| return handleGestureTapDown(targetedEvent); |
| 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::GesturePinchBegin: |
| case PlatformEvent::GesturePinchEnd: |
| case PlatformEvent::GesturePinchUpdate: |
| case PlatformEvent::GestureTapDownCancel: |
| case PlatformEvent::GestureTapUnconfirmed: |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| |
| return WebInputEventResult::NotHandled; |
| } |
| |
| WebInputEventResult EventHandler::handleGestureScrollEvent(const PlatformGestureEvent& gestureEvent) |
| { |
| TRACE_EVENT0("input", "EventHandler::handleGestureScrollEvent"); |
| |
| return m_scrollManager.handleGestureScrollEvent(gestureEvent); |
| } |
| |
| WebInputEventResult EventHandler::handleGestureTapDown(const GestureEventWithHitTestResults& targetedEvent) |
| { |
| m_suppressMouseEventsFromGestures = |
| m_pointerEventManager.primaryPointerdownCanceled(targetedEvent.event().uniqueTouchEventId()); |
| return WebInputEventResult::NotHandled; |
| } |
| |
| WebInputEventResult EventHandler::handleGestureTap(const GestureEventWithHitTestResults& targetedEvent) |
| { |
| 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()); |
| |
| const unsigned modifiers = gestureEvent.getModifiers(); |
| |
| if (!m_suppressMouseEventsFromGestures) { |
| PlatformMouseEvent fakeMouseMove(gestureEvent.position(), gestureEvent.globalPosition(), |
| NoButton, PlatformEvent::MouseMoved, /* clickCount */ 0, |
| static_cast<PlatformEvent::Modifiers>(modifiers), |
| PlatformMouseEvent::FromTouch, gestureEvent.timestamp(), WebPointerProperties::PointerType::Mouse); |
| dispatchMouseEvent(EventTypeNames::mousemove, currentHitTest.innerNode(), 0, fakeMouseMove); |
| } |
| |
| // 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()->updateLifecycleToCompositingCleanPlusScrolling(); |
| adjustedPoint = frameView->rootFrameToContents(gestureEvent.position()); |
| currentHitTest = hitTestResultInFrame(m_frame, adjustedPoint, hitType); |
| } |
| m_clickNode = currentHitTest.innerNode(); |
| |
| // Capture data for showUnhandledTapUIIfNeeded. |
| Node* tappedNode = m_clickNode; |
| IntPoint tappedPosition = gestureEvent.position(); |
| |
| if (m_clickNode && m_clickNode->isTextNode()) |
| m_clickNode = FlatTreeTraversal::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(), WebPointerProperties::PointerType::Mouse); |
| |
| // TODO(mustaq): We suppress MEs plus all it's side effects. What would that |
| // mean for for TEs? What's the right balance here? crbug.com/617255 |
| WebInputEventResult mouseDownEventResult = WebInputEventResult::HandledSuppressed; |
| if (!m_suppressMouseEventsFromGestures) { |
| mouseDownEventResult = dispatchMouseEvent(EventTypeNames::mousedown, currentHitTest.innerNode(), gestureEvent.tapCount(), fakeMouseDown); |
| selectionController().initializeSelectionState(); |
| if (mouseDownEventResult == WebInputEventResult::NotHandled) |
| mouseDownEventResult = handleMouseFocus(MouseEventWithHitTestResults(fakeMouseDown, currentHitTest), InputDeviceCapabilities::firesTouchEventsSourceCapabilities()); |
| if (mouseDownEventResult == WebInputEventResult::NotHandled) |
| mouseDownEventResult = 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(), WebPointerProperties::PointerType::Mouse); |
| WebInputEventResult mouseUpEventResult = m_suppressMouseEventsFromGestures |
| ? WebInputEventResult::HandledSuppressed |
| : dispatchMouseEvent(EventTypeNames::mouseup, currentHitTest.innerNode(), gestureEvent.tapCount(), fakeMouseUp); |
| |
| WebInputEventResult clickEventResult = WebInputEventResult::NotHandled; |
| 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); |
| clickEventResult = dispatchMouseEvent(EventTypeNames::click, clickTargetNode, gestureEvent.tapCount(), fakeMouseUp); |
| } |
| m_clickNode = nullptr; |
| } |
| |
| if (mouseUpEventResult == WebInputEventResult::NotHandled) |
| mouseUpEventResult = handleMouseReleaseEvent(MouseEventWithHitTestResults(fakeMouseUp, currentHitTest)); |
| |
| WebInputEventResult eventResult = mergeEventResult(mergeEventResult(mouseDownEventResult, mouseUpEventResult), clickEventResult); |
| if (eventResult == WebInputEventResult::NotHandled && tappedNode && m_frame->page()) { |
| bool domTreeChanged = preDispatchDomTreeVersion != m_frame->document()->domTreeVersion(); |
| bool styleChanged = preDispatchStyleVersion != m_frame->document()->styleVersion(); |
| |
| IntPoint tappedPositionInViewport = frameHost()->visualViewport().rootFrameToViewport(tappedPosition); |
| m_frame->chromeClient().showUnhandledTapUIIfNeeded(tappedPositionInViewport, tappedNode, domTreeChanged || styleChanged); |
| } |
| return eventResult; |
| } |
| |
| WebInputEventResult EventHandler::handleGestureLongPress(const GestureEventWithHitTestResults& targetedEvent) |
| { |
| const PlatformGestureEvent& gestureEvent = targetedEvent.event(); |
| IntPoint adjustedPoint = gestureEvent.position(); |
| |
| unsigned modifiers = gestureEvent.getModifiers(); |
| |
| // 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()) { |
| // TODO(mustaq): Suppressing long-tap MouseEvents could break |
| // drag-drop. Will do separately because of the risk. crbug.com/606938. |
| PlatformMouseEvent mouseDownEvent(adjustedPoint, gestureEvent.globalPosition(), LeftButton, PlatformEvent::MousePressed, 1, |
| static_cast<PlatformEvent::Modifiers>(modifiers | PlatformEvent::LeftButtonDown), |
| PlatformMouseEvent::FromTouch, WTF::monotonicallyIncreasingTime(), WebPointerProperties::PointerType::Mouse); |
| m_mouseDown = mouseDownEvent; |
| |
| PlatformMouseEvent mouseDragEvent(adjustedPoint, gestureEvent.globalPosition(), LeftButton, PlatformEvent::MouseMoved, 1, |
| static_cast<PlatformEvent::Modifiers>(modifiers | PlatformEvent::LeftButtonDown), |
| PlatformMouseEvent::FromTouch, WTF::monotonicallyIncreasingTime(), WebPointerProperties::PointerType::Mouse); |
| HitTestRequest request(HitTestRequest::ReadOnly); |
| MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseDragEvent); |
| m_mouseDownMayStartDrag = true; |
| dragState().m_dragSrc = nullptr; |
| m_mouseDownPos = m_frame->view()->rootFrameToContents(mouseDragEvent.position()); |
| if (handleDrag(mev, DragInitiator::Touch)) { |
| m_longTapShouldInvokeContextMenu = true; |
| return WebInputEventResult::HandledSystem; |
| } |
| } |
| |
| IntPoint hitTestPoint = m_frame->view()->rootFrameToContents(gestureEvent.position()); |
| HitTestResult result = hitTestResultAtPoint(hitTestPoint); |
| if (selectionController().handleGestureLongPress(gestureEvent, result)) { |
| focusDocumentView(); |
| return WebInputEventResult::HandledSystem; |
| } |
| |
| return sendContextMenuEventForGesture(targetedEvent); |
| } |
| |
| WebInputEventResult EventHandler::handleGestureLongTap(const GestureEventWithHitTestResults& targetedEvent) |
| { |
| #if !OS(ANDROID) |
| if (m_longTapShouldInvokeContextMenu) { |
| m_longTapShouldInvokeContextMenu = false; |
| return sendContextMenuEventForGesture(targetedEvent); |
| } |
| #endif |
| return WebInputEventResult::NotHandled; |
| } |
| |
| WebInputEventResult EventHandler::handleGestureScrollEnd(const PlatformGestureEvent& gestureEvent) |
| { |
| return m_scrollManager.handleGestureScrollEnd(gestureEvent); |
| } |
| |
| bool EventHandler::isScrollbarHandlingGestures() const |
| { |
| return m_scrollManager.isScrollbarHandlingGestures(); |
| } |
| |
| 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()); |
| |
| HeapVector<Member<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, HeapVector<Member<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()); |
| HeapVector<Member<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, HeapVector<Member<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); |
| HeapVector<Member<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, HeapVector<Member<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()); |
| |
| HeapVector<Member<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; |
| } |
| |
| Node* oldHoverNodeInCurDoc = m_frame->document()->hoverNode(); |
| 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); |
| 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 |
| HeapVector<Member<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; |
| HeapVector<Member<LocalFrame>> exitedFrameChain; |
| // Insert the frame from the disagreement between last frames and entered frames |
| while (exitedFrameInDocument) { |
| Node* lastNodeUnderTap = exitedFrameInDocument->eventHandler().m_nodeUnderMouse.get(); |
| 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.getModifiers(); |
| PlatformMouseEvent fakeMouseMove(gestureEvent.position(), gestureEvent.globalPosition(), |
| NoButton, PlatformEvent::MouseMoved, /* clickCount */ 0, |
| static_cast<PlatformEvent::Modifiers>(modifiers), |
| PlatformMouseEvent::FromTouch, gestureEvent.timestamp(), WebPointerProperties::PointerType::Mouse); |
| |
| // Update the mouseout/mouseleave event |
| size_t indexExitedFrameChain = exitedFrameChain.size(); |
| while (indexExitedFrameChain) { |
| LocalFrame* leaveFrame = exitedFrameChain[--indexExitedFrameChain]; |
| leaveFrame->eventHandler().updateMouseEventTargetNodeAndSendEvents(nullptr, fakeMouseMove); |
| } |
| |
| // update the mouseover/mouseenter event |
| while (indexEnteredFrameChain) { |
| Frame* parentFrame = enteredFrameChain[--indexEnteredFrameChain]->tree().parent(); |
| if (parentFrame && parentFrame->isLocalFrame()) |
| toLocalFrame(parentFrame)->eventHandler().updateMouseEventTargetNodeAndSendEvents(toHTMLFrameOwnerElement(enteredFrameChain[indexEnteredFrameChain]->owner()), fakeMouseMove); |
| } |
| } |
| |
| 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::monotonicallyIncreasingTime() - 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, BLINK_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::EventType 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); |
| } |
| } |
| |
| WebInputEventResult EventHandler::sendContextMenuEvent(const PlatformMouseEvent& event, Node* overrideTargetNode) |
| { |
| FrameView* v = m_frame->view(); |
| if (!v) |
| return WebInputEventResult::NotHandled; |
| |
| // 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); |
| } |
| |
| WebInputEventResult EventHandler::sendContextMenuEventForKey(Element* overrideTargetElement) |
| { |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return WebInputEventResult::NotHandled; |
| |
| Document* doc = m_frame->document(); |
| if (!doc) |
| return WebInputEventResult::NotHandled; |
| |
| 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 = 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->boundsInViewport(); |
| locationInRootFrame = visualViewport.viewportToRootFrame(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->getHostWindow()->viewportToScreen(IntRect(locationInViewport, IntSize()), m_frame->view()).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::EventType eventType = PlatformEvent::MousePressed; |
| if (m_frame->settings() && m_frame->settings()->showContextMenuOnMouseUp()) |
| eventType = PlatformEvent::MouseReleased; |
| |
| PlatformMouseEvent mouseEvent(locationInRootFrame, globalPosition, |
| RightButton, eventType, 1, |
| PlatformEvent::NoModifiers, PlatformMouseEvent::RealOrIndistinguishable, |
| WTF::monotonicallyIncreasingTime(), WebPointerProperties::PointerType::Mouse); |
| |
| return sendContextMenuEvent(mouseEvent, overrideTargetElement); |
| } |
| |
| WebInputEventResult EventHandler::sendContextMenuEventForGesture(const GestureEventWithHitTestResults& targetedEvent) |
| { |
| const PlatformGestureEvent& gestureEvent = targetedEvent.event(); |
| unsigned modifiers = gestureEvent.getModifiers(); |
| |
| // 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(), WebPointerProperties::PointerType::Mouse); |
| dispatchMouseEvent(EventTypeNames::mousemove, targetedEvent.hitTestResult().innerNode(), 0, fakeMouseMove); |
| |
| PlatformEvent::EventType eventType = PlatformEvent::MousePressed; |
| |
| if (m_frame->settings() && m_frame->settings()->showContextMenuOnMouseUp()) |
| eventType = PlatformEvent::MouseReleased; |
| |
| // Always set right button down as we are sending mousedown event regardless |
| modifiers |= PlatformEvent::RightButtonDown; |
| |
| // TODO(crbug.com/579564): Maybe we should not send mouse down at all |
| PlatformMouseEvent mouseEvent(targetedEvent.event().position(), targetedEvent.event().globalPosition(), RightButton, eventType, 1, |
| static_cast<PlatformEvent::Modifiers>(modifiers), |
| PlatformMouseEvent::FromTouch, WTF::monotonicallyIncreasingTime(), WebPointerProperties::PointerType::Mouse); |
| // 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, BLINK_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, BLINK_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, BLINK_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; |
| |
| PlatformMouseEvent fakeMouseMoveEvent(m_lastKnownMousePosition, m_lastKnownMouseGlobalPosition, NoButton, PlatformEvent::MouseMoved, 0, PlatformKeyboardEvent::getCurrentModifierState(), PlatformMouseEvent::RealOrIndistinguishable, monotonicallyIncreasingTime(), WebPointerProperties::PointerType::Mouse); |
| 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() |
| { |
| m_scrollManager.clearResizeScrollableArea(true); |
| } |
| |
| void EventHandler::hoverTimerFired(Timer<EventHandler>*) |
| { |
| TRACE_EVENT0("input", "EventHandler::hoverTimerFired"); |
| m_hoverTimer.stop(); |
| |
| ASSERT(m_frame); |
| ASSERT(m_frame->document()); |
| |
| if (LayoutViewItem layoutItem = m_frame->contentLayoutItem()) { |
| if (FrameView* view = m_frame->view()) { |
| HitTestRequest request(HitTestRequest::Move); |
| HitTestResult result(request, view->rootFrameToContents(m_lastKnownMousePosition)); |
| layoutItem.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) |
| { |
| return m_keyboardEventManager.handleAccessKey(evt); |
| } |
| |
| WebInputEventResult EventHandler::keyEvent(const PlatformKeyboardEvent& initialKeyEvent) |
| { |
| return m_keyboardEventManager.keyEvent(initialKeyEvent); |
| } |
| |
| void EventHandler::defaultKeyboardEventHandler(KeyboardEvent* event) |
| { |
| m_keyboardEventManager.defaultKeyboardEventHandler(event, m_mousePressNode); |
| } |
| |
| bool EventHandler::dragHysteresisExceeded(const IntPoint& dragLocationInRootFrame) const |
| { |
| FrameView* view = m_frame->view(); |
| if (!view) |
| return false; |
| IntPoint dragLocation = view->rootFrameToContents(dragLocationInRootFrame); |
| IntSize delta = dragLocation - m_mouseDownPos; |
| |
| int threshold = GeneralDragHysteresis; |
| switch (dragState().m_dragType) { |
| case DragSourceActionSelection: |
| threshold = TextDragHysteresis; |
| break; |
| case DragSourceActionImage: |
| threshold = ImageDragHysteresis; |
| break; |
| case DragSourceActionLink: |
| threshold = LinkDragHysteresis; |
| break; |
| case DragSourceActionDHTML: |
| break; |
| case DragSourceActionNone: |
| ASSERT_NOT_REACHED(); |
| } |
| |
| return abs(delta.width()) >= threshold || abs(delta.height()) >= threshold; |
| } |
| |
| void EventHandler::clearDragDataTransfer() |
| { |
| if (dragState().m_dragDataTransfer) { |
| dragState().m_dragDataTransfer->clearDragImage(); |
| dragState().m_dragDataTransfer->setAccessPolicy(DataTransferNumb); |
| } |
| } |
| |
| 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->inShadowIncludingDocument()) |
| dragState().m_dragSrc = rootEditableElement; |
| } |
| |
| // returns if we should continue "default processing", i.e., whether eventhandler canceled |
| WebInputEventResult EventHandler::dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent& event) |
| { |
| return dispatchDragEvent(eventType, dragState().m_dragSrc.get(), event, dragState().m_dragDataTransfer.get()); |
| } |
| |
| bool EventHandler::handleDrag(const MouseEventWithHitTestResults& event, DragInitiator initiator) |
| { |
| ASSERT(event.event().type() == PlatformEvent::MouseMoved); |
| // Callers must protect the reference to FrameView, since this function may dispatch DOM |
| // events, causing page/FrameView to go away. |
| ASSERT(m_frame); |
| ASSERT(m_frame->view()); |
| if (!m_frame->page()) |
| return false; |
| |
| if (m_mouseDownMayStartDrag) { |
| HitTestRequest request(HitTestRequest::ReadOnly); |
| HitTestResult result(request, m_mouseDownPos); |
| m_frame->contentLayoutItem().hitTest(result); |
| Node* node = result.innerNode(); |
| if (node) { |
| DragController::SelectionDragPolicy selectionDragPolicy = event.event().timestamp() - m_mouseDownTimestamp < TextDragDelay |
| ? DragController::DelayedSelectionDragResolution |
| : DragController::ImmediateSelectionDragResolution; |
| dragState().m_dragSrc = m_frame->page()->dragController().draggableNode(m_frame, node, m_mouseDownPos, selectionDragPolicy, dragState().m_dragType); |
| } else { |
| dragState().m_dragSrc = nullptr; |
| } |
| |
| if (!dragState().m_dragSrc) |
| m_mouseDownMayStartDrag = false; // no element is draggable |
| } |
| |
| if (!m_mouseDownMayStartDrag) |
| return initiator == DragInitiator::Mouse && !selectionController().mouseDownMayStartSelect() && !m_mouseDownMayStartAutoscroll; |
| |
| // We are starting a text/image/url drag, so the cursor should be an arrow |
| // FIXME <rdar://7577595>: Custom cursors aren't supported during drag and drop (default to pointer). |
| m_frame->view()->setCursor(pointerCursor()); |
| |
| if (initiator == DragInitiator::Mouse && !dragHysteresisExceeded(event.event().position())) |
| return true; |
| |
| // Once we're past the hysteresis point, we don't want to treat this gesture as a click |
| invalidateClick(); |
| |
| if (!tryStartDrag(event)) { |
| // Something failed to start the drag, clean up. |
| clearDragDataTransfer(); |
| dragState().m_dragSrc = nullptr; |
| } |
| |
| m_mouseDownMayStartDrag = false; |
| // Whether or not the drag actually started, no more default handling (like selection). |
| return true; |
| } |
| |
| bool EventHandler::tryStartDrag(const MouseEventWithHitTestResults& event) |
| { |
| // The DataTransfer would only be non-empty if we missed a dragEnd. |
| // Clear it anyway, just to make sure it gets numbified. |
| clearDragDataTransfer(); |
| |
| dragState().m_dragDataTransfer = createDraggingDataTransfer(); |
| |
| // Check to see if this a DOM based drag, if it is get the DOM specified drag |
| // image and offset |
| if (dragState().m_dragType == DragSourceActionDHTML) { |
| if (LayoutObject* layoutObject = dragState().m_dragSrc->layoutObject()) { |
| IntRect boundingIncludingDescendants = layoutObject->absoluteBoundingBoxRectIncludingDescendants(); |
| IntSize delta = m_mouseDownPos - boundingIncludingDescendants.location(); |
| dragState().m_dragDataTransfer->setDragImageElement(dragState().m_dragSrc.get(), IntPoint(delta)); |
| } else { |
| // The layoutObject has disappeared, this can happen if the onStartDrag handler has hidden |
| // the element in some way. In this case we just kill the drag. |
| return false; |
| } |
| } |
| |
| DragController& dragController = m_frame->page()->dragController(); |
| if (!dragController.populateDragDataTransfer(m_frame, dragState(), m_mouseDownPos)) |
| return false; |
| |
| // If dispatching dragstart brings about another mouse down -- one way |
| // this will happen is if a DevTools user breaks within a dragstart |
| // handler and then clicks on the suspended page -- the drag state is |
| // reset. Hence, need to check if this particular drag operation can |
| // continue even if dispatchEvent() indicates no (direct) cancellation. |
| // Do that by checking if m_dragSrc is still set. |
| m_mouseDownMayStartDrag = dispatchDragSrcEvent(EventTypeNames::dragstart, m_mouseDown) == WebInputEventResult::NotHandled |
| && !m_frame->selection().isInPasswordField() && dragState().m_dragSrc; |
| |
| // Invalidate clipboard here against anymore pasteboard writing for security. The drag |
| // image can still be changed as we drag, but not the pasteboard data. |
| dragState().m_dragDataTransfer->setAccessPolicy(DataTransferImageWritable); |
| |
| if (m_mouseDownMayStartDrag) { |
| // Dispatching the event could cause Page to go away. Make sure it's still valid before trying to use DragController. |
| if (m_frame->page() && dragController.startDrag(m_frame, dragState(), event.event(), m_mouseDownPos)) |
| return true; |
| // Drag was canned at the last minute - we owe m_dragSrc a DRAGEND event |
| dispatchDragSrcEvent(EventTypeNames::dragend, event.event()); |
| } |
| |
| return false; |
| } |
| |
| 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; |
| |
| TextEvent* event = TextEvent::create(m_frame->domWindow(), text, inputType); |
| event->setUnderlyingEvent(underlyingEvent); |
| |
| target->dispatchEvent(event); |
| return event->defaultHandled() || event->defaultPrevented(); |
| } |
| |
| void EventHandler::defaultTextInputEventHandler(TextEvent* event) |
| { |
| if (m_frame->editor().handleTextEvent(event)) |
| event->setDefaultHandled(); |
| } |
| |
| void EventHandler::capsLockStateMayHaveChanged() |
| { |
| m_keyboardEventManager.capsLockStateMayHaveChanged(); |
| } |
| |
| bool EventHandler::passMousePressEventToScrollbar(MouseEventWithHitTestResults& mev) |
| { |
| Scrollbar* scrollbar = mev.scrollbar(); |
| updateLastScrollbarUnderMouse(scrollbar, true); |
| |
| if (!scrollbar || !scrollbar->enabled()) |
| return false; |
| m_scrollManager.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; |
| } |
| } |
| |
| HitTestResult EventHandler::hitTestResultInFrame(LocalFrame* frame, const LayoutPoint& point, HitTestRequest::HitTestRequestType hitType) |
| { |
| HitTestResult result(HitTestRequest(hitType), point); |
| |
| if (!frame || frame->contentLayoutItem().isNull()) |
| return result; |
| if (frame->view()) { |
| IntRect rect = frame->view()->visibleContentRect(IncludeScrollbars); |
| if (!rect.contains(roundedIntPoint(point))) |
| return result; |
| } |
| frame->contentLayoutItem().hitTest(result); |
| return result; |
| } |
| |
| WebInputEventResult EventHandler::handleTouchEvent(const PlatformTouchEvent& event) |
| { |
| TRACE_EVENT0("blink", "EventHandler::handleTouchEvent"); |
| return m_pointerEventManager.handleTouchEvents(event); |
| } |
| |
| void EventHandler::setLastKnownMousePosition(const PlatformMouseEvent& event) |
| { |
| m_mousePositionIsUnknown = false; |
| m_lastKnownMousePosition = event.position(); |
| m_lastKnownMouseGlobalPosition = event.globalPosition(); |
| } |
| |
| WebInputEventResult EventHandler::passMousePressEventToSubframe(MouseEventWithHitTestResults& mev, LocalFrame* subframe) |
| { |
| selectionController().passMousePressEventToSubframe(mev); |
| WebInputEventResult result = subframe->eventHandler().handleMousePressEvent(mev.event()); |
| if (result != WebInputEventResult::NotHandled) |
| return result; |
| return WebInputEventResult::HandledSystem; |
| } |
| |
| WebInputEventResult EventHandler::passMouseMoveEventToSubframe(MouseEventWithHitTestResults& mev, LocalFrame* subframe, HitTestResult* hoveredNode) |
| { |
| if (m_mouseDownMayStartDrag) |
| return WebInputEventResult::NotHandled; |
| WebInputEventResult result = subframe->eventHandler().handleMouseMoveOrLeaveEvent(mev.event(), hoveredNode); |
| if (result != WebInputEventResult::NotHandled) |
| return result; |
| return WebInputEventResult::HandledSystem; |
| } |
| |
| WebInputEventResult EventHandler::passMouseReleaseEventToSubframe(MouseEventWithHitTestResults& mev, LocalFrame* subframe) |
| { |
| WebInputEventResult result = subframe->eventHandler().handleMouseReleaseEvent(mev.event()); |
| if (result != WebInputEventResult::NotHandled) |
| return result; |
| return WebInputEventResult::HandledSystem; |
| } |
| |
| DataTransfer* EventHandler::createDraggingDataTransfer() const |
| { |
| return DataTransfer::create(DataTransfer::DragAndDrop, DataTransferWritable, DataObject::create()); |
| } |
| |
| void EventHandler::focusDocumentView() |
| { |
| Page* page = m_frame->page(); |
| if (!page) |
| return; |
| page->focusController().focusDocumentView(m_frame); |
| } |
| |
| FrameHost* EventHandler::frameHost() const |
| { |
| if (!m_frame->page()) |
| return nullptr; |
| |
| return &m_frame->page()->frameHost(); |
| } |
| |
| } // namespace blink |