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/*
* Copyright (C) 2019 Igalia S.L.
*
* 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 "FloatRect.h"
#include "LayoutSize.h"
#include "ResizeObserverBoxOptions.h"
#include <wtf/RefCounted.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/WeakPtr.h>
namespace WTF {
class TextStream;
}
namespace WebCore {
class Element;
class WeakPtrImplWithEventTargetData;
class ResizeObservation : public RefCounted<ResizeObservation> {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(ResizeObservation);
public:
static Ref<ResizeObservation> create(Element& target, ResizeObserverBoxOptions);
~ResizeObservation();
struct BoxSizes {
LayoutSize contentBoxSize;
LayoutSize contentBoxLogicalSize;
LayoutSize borderBoxLogicalSize;
};
std::optional<BoxSizes> elementSizeChanged() const;
void updateObservationSize(const BoxSizes&);
void resetObservationSize();
FloatRect computeContentRect() const;
FloatSize borderBoxSize() const;
FloatSize contentBoxSize() const;
FloatSize snappedContentBoxSize() const;
Element* target() const { return m_target.get(); }
RefPtr<Element> protectedTarget() const;
ResizeObserverBoxOptions observedBox() const { return m_observedBox; }
size_t targetElementDepth() const;
private:
ResizeObservation(Element&, ResizeObserverBoxOptions);
std::optional<BoxSizes> computeObservedSizes() const;
LayoutPoint computeTargetLocation() const;
WeakPtr<Element, WeakPtrImplWithEventTargetData> m_target;
BoxSizes m_lastObservationSizes;
ResizeObserverBoxOptions m_observedBox;
};
WTF::TextStream& operator<<(WTF::TextStream&, const ResizeObservation&);
} // namespace WebCore
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