/* * Copyright (C) 2019 Apple Inc. All rights reserved. * * 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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. */ #pragma once #include "ExceptionOr.h" #include "PointerID.h" #include namespace WebCore { class Document; class Element; class EventTarget; class IntPoint; class MouseEvent; class Page; class PlatformTouchEvent; class PointerEvent; class WindowProxy; class PointerCaptureController { WTF_MAKE_NONCOPYABLE(PointerCaptureController); WTF_MAKE_FAST_ALLOCATED; public: explicit PointerCaptureController(Page&); Element* pointerCaptureElement(Document*, PointerID) const; ExceptionOr setPointerCapture(Element*, PointerID); ExceptionOr releasePointerCapture(Element*, PointerID); bool hasPointerCapture(Element*, PointerID); void reset(); void pointerLockWasApplied(); void elementWasRemoved(Element&); RefPtr pointerEventForMouseEvent(const MouseEvent&, PointerID, const String& pointerType); #if ENABLE(TOUCH_EVENTS) && PLATFORM(IOS_FAMILY) void dispatchEventForTouchAtIndex(EventTarget&, const PlatformTouchEvent&, unsigned, bool isPrimary, WindowProxy&); #endif WEBCORE_EXPORT void touchWithIdentifierWasRemoved(PointerID); bool hasCancelledPointerEventForIdentifier(PointerID) const; bool preventsCompatibilityMouseEventsForIdentifier(PointerID) const; void dispatchEvent(PointerEvent&, EventTarget*); WEBCORE_EXPORT void cancelPointer(PointerID, const IntPoint&); void processPendingPointerCapture(PointerID); private: struct CapturingData : public RefCounted { static Ref create(const String& pointerType) { return adoptRef(*new CapturingData(pointerType)); } RefPtr pendingTargetOverride; RefPtr targetOverride; #if ENABLE(TOUCH_EVENTS) && PLATFORM(IOS_FAMILY) RefPtr previousTarget; #endif bool hasAnyElement() const { return pendingTargetOverride || targetOverride #if ENABLE(TOUCH_EVENTS) && PLATFORM(IOS_FAMILY) || previousTarget #endif ; } String pointerType; enum class State : uint8_t { Ready, Finished, Cancelled, }; State state { State::Ready }; bool isPrimary { false }; bool preventsCompatibilityMouseEvents { false }; bool pointerIsPressed { false }; short previousMouseButton { -1 }; private: CapturingData(const String& pointerType) : pointerType(pointerType) { } }; Ref ensureCapturingDataForPointerEvent(const PointerEvent&); void pointerEventWillBeDispatched(const PointerEvent&, EventTarget*); void pointerEventWasDispatched(const PointerEvent&); void updateHaveAnyCapturingElement(); Page& m_page; // While PointerID is defined as int32_t, we use int64_t here so that we may use a value outside of the int32_t range to have safe // empty and removed values, allowing any int32_t to be provided through the API for lookup in this hashmap. using PointerIdToCapturingDataMap = HashMap, WTF::IntHash, WTF::SignedWithZeroKeyHashTraits>; PointerIdToCapturingDataMap m_activePointerIdsToCapturingData; bool m_processingPendingPointerCapture { false }; bool m_haveAnyCapturingElement { false }; }; } // namespace WebCore