106 lines
3.3 KiB
C++
106 lines
3.3 KiB
C++
/*
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* Copyright (C) 2019 Igalia S.L.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#if ENABLE(RESIZE_OBSERVER)
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#include "ResizeObservation.h"
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#include "HTMLFrameOwnerElement.h"
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#include "RenderBox.h"
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#include "SVGElement.h"
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namespace WebCore {
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Ref<ResizeObservation> ResizeObservation::create(Element& target)
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{
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return adoptRef(*new ResizeObservation(target));
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}
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ResizeObservation::ResizeObservation(Element& element)
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: m_target { makeWeakPtr(element) }
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{
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}
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ResizeObservation::~ResizeObservation()
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{
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}
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void ResizeObservation::updateObservationSize(const LayoutSize& size)
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{
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m_lastObservationSize = size;
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}
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LayoutSize ResizeObservation::computeObservedSize() const
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{
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if (m_target->isSVGElement()) {
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if (auto svgRect = downcast<SVGElement>(*m_target).getBoundingBox())
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return LayoutSize(svgRect->width(), svgRect->height());
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}
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auto* box = m_target->renderBox();
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if (box) {
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auto contentSize = box->contentSize();
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return LayoutSize(adjustLayoutUnitForAbsoluteZoom(contentSize.width(), *box), adjustLayoutUnitForAbsoluteZoom(contentSize.height(), *box));
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}
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return LayoutSize();
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}
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LayoutPoint ResizeObservation::computeTargetLocation() const
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{
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if (!m_target->isSVGElement()) {
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if (auto box = m_target->renderBox())
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return LayoutPoint(box->paddingLeft(), box->paddingTop());
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}
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return { };
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}
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FloatRect ResizeObservation::computeContentRect() const
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{
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return FloatRect(FloatPoint(computeTargetLocation()), FloatSize(m_lastObservationSize));
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}
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bool ResizeObservation::elementSizeChanged(LayoutSize& currentSize) const
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{
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currentSize = computeObservedSize();
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return m_lastObservationSize != currentSize;
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}
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size_t ResizeObservation::targetElementDepth() const
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{
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unsigned depth = 0;
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for (Element* ownerElement = m_target.get(); ownerElement; ownerElement = ownerElement->document().ownerElement()) {
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for (Element* parent = ownerElement; parent; parent = parent->parentElement())
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++depth;
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}
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return depth;
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}
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} // namespace WebCore
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#endif // ENABLE(RESIZE_OBSERVER)
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