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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.
*/
#include "config.h"
#if ENABLE(RESIZE_OBSERVER)
#include "ResizeObservation.h"
#include "HTMLFrameOwnerElement.h"
#include "RenderBox.h"
#include "SVGElement.h"
namespace WebCore {
Ref<ResizeObservation> ResizeObservation::create(Element& target)
{
return adoptRef(*new ResizeObservation(target));
}
ResizeObservation::ResizeObservation(Element& element)
: m_target { makeWeakPtr(element) }
{
}
ResizeObservation::~ResizeObservation()
{
}
void ResizeObservation::updateObservationSize(const LayoutSize& size)
{
m_lastObservationSize = size;
}
LayoutSize ResizeObservation::computeObservedSize() const
{
if (m_target->isSVGElement()) {
if (auto svgRect = downcast<SVGElement>(*m_target).getBoundingBox())
return LayoutSize(svgRect->width(), svgRect->height());
}
auto* box = m_target->renderBox();
if (box) {
auto contentSize = box->contentSize();
return LayoutSize(adjustLayoutUnitForAbsoluteZoom(contentSize.width(), *box), adjustLayoutUnitForAbsoluteZoom(contentSize.height(), *box));
}
return LayoutSize();
}
LayoutPoint ResizeObservation::computeTargetLocation() const
{
if (!m_target->isSVGElement()) {
if (auto box = m_target->renderBox())
return LayoutPoint(box->paddingLeft(), box->paddingTop());
}
return { };
}
FloatRect ResizeObservation::computeContentRect() const
{
return FloatRect(FloatPoint(computeTargetLocation()), FloatSize(m_lastObservationSize));
}
bool ResizeObservation::elementSizeChanged(LayoutSize& currentSize) const
{
currentSize = computeObservedSize();
return m_lastObservationSize != currentSize;
}
size_t ResizeObservation::targetElementDepth() const
{
unsigned depth = 0;
for (Element* ownerElement = m_target.get(); ownerElement; ownerElement = ownerElement->document().ownerElement()) {
for (Element* parent = ownerElement; parent; parent = parent->parentElement())
++depth;
}
return depth;
}
} // namespace WebCore
#endif // ENABLE(RESIZE_OBSERVER)
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