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/*
* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
* (C) 2000 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2003, 2005-2008, 2016 Apple Inc. All rights reserved.
* Copyright (C) 2020 Noam Rosenthal (noam@webkit.org)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "StyleCursorImage.h"
#include "CSSCursorImageValue.h"
#include "CSSImageValue.h"
#include "CSSValuePair.h"
#include "CachedImage.h"
#include "FloatSize.h"
#include "RenderElement.h"
#include "SVGCursorElement.h"
#include "SVGElementTypeHelpers.h"
#include "SVGLengthContext.h"
#include "SVGURIReference.h"
#include "StyleBuilderState.h"
#include "StyleCachedImage.h"
#include "StyleImageSet.h"
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_ALLOCATED_IMPL(StyleCursorImage);
Ref<StyleCursorImage> StyleCursorImage::create(Ref<StyleImage>&& image, const std::optional<IntPoint>& hotSpot, const URL& originalURL, LoadedFromOpaqueSource loadedFromOpaqueSource)
{
return adoptRef(*new StyleCursorImage(WTFMove(image), hotSpot, originalURL, loadedFromOpaqueSource));
}
StyleCursorImage::StyleCursorImage(Ref<StyleImage>&& image, const std::optional<IntPoint>& hotSpot, const URL& originalURL, LoadedFromOpaqueSource loadedFromOpaqueSource)
: StyleMultiImage { Type::CursorImage }
, m_image { WTFMove(image) }
, m_hotSpot { hotSpot }
, m_originalURL { originalURL }
, m_loadedFromOpaqueSource { loadedFromOpaqueSource }
{
}
StyleCursorImage::~StyleCursorImage()
{
for (auto& element : m_cursorElements)
element.removeClient(*this);
}
bool StyleCursorImage::operator==(const StyleImage& other) const
{
auto* otherCursorImage = dynamicDowncast<StyleCursorImage>(other);
return otherCursorImage && equals(*otherCursorImage);
}
bool StyleCursorImage::equals(const StyleCursorImage& other) const
{
return equalInputImages(other) && StyleMultiImage::equals(other);
}
bool StyleCursorImage::equalInputImages(const StyleCursorImage& other) const
{
return m_image.get() == other.m_image.get();
}
Ref<CSSValue> StyleCursorImage::computedStyleValue(const RenderStyle& style) const
{
RefPtr<CSSValuePair> hotSpot;
if (m_hotSpot)
hotSpot = CSSValuePair::createNoncoalescing(CSSPrimitiveValue::create(m_hotSpot->x()), CSSPrimitiveValue::create(m_hotSpot->y()));
return CSSCursorImageValue::create(m_image->computedStyleValue(style), WTFMove(hotSpot), m_originalURL, m_loadedFromOpaqueSource );
}
ImageWithScale StyleCursorImage::selectBestFitImage(const Document& document)
{
if (RefPtr imageSet = dynamicDowncast<StyleImageSet>(m_image.get()))
return imageSet->selectBestFitImage(document);
if (RefPtr cachedImage = dynamicDowncast<StyleCachedImage>(m_image.get())) {
if (RefPtr cursorElement = updateCursorElement(document)) {
auto existingImageURL = cachedImage->imageURL();
auto updatedImageURL = document.completeURL(cursorElement->href());
if (existingImageURL != updatedImageURL)
m_image = StyleCachedImage::create(CSSImageValue::create(WTFMove(updatedImageURL), m_loadedFromOpaqueSource));
}
}
return { m_image.ptr(), 1, String() };
}
RefPtr<SVGCursorElement> StyleCursorImage::updateCursorElement(const Document& document)
{
RefPtr cursorElement = dynamicDowncast<SVGCursorElement>(SVGURIReference::targetElementFromIRIString(m_originalURL.string(), document).element);
if (!cursorElement)
return nullptr;
// FIXME: Not right to keep old cursor elements as clients. The new one should replace the old, not join it in a set.
if (m_cursorElements.add(*cursorElement).isNewEntry) {
cursorElementChanged(*cursorElement);
cursorElement->addClient(*this);
}
return cursorElement;
}
void StyleCursorImage::cursorElementRemoved(SVGCursorElement& cursorElement)
{
// FIXME: Not right to stay a client of a cursor element until the element is destroyed. We'd want to stop being a client once it's no longer a valid target, like when it's disconnected.
m_cursorElements.remove(cursorElement);
}
void StyleCursorImage::cursorElementChanged(SVGCursorElement& cursorElement)
{
// FIXME: Seems wrong that changing an old cursor element, one that that is no longer the target, changes the hot spot.
// FIXME: This will override a hot spot that was specified in CSS, which is probably incorrect.
// FIXME: Should we clamp from float to int instead of just casting here?
SVGLengthContext lengthContext(nullptr);
m_hotSpot = IntPoint {
static_cast<int>(std::round(cursorElement.x().value(lengthContext))),
static_cast<int>(std::round(cursorElement.y().value(lengthContext)))
};
// FIXME: Why doesn't this funtion check for a change to the href of the cursor element? Why would we dynamically track changes to x/y but not href?
}
void StyleCursorImage::setContainerContextForRenderer(const RenderElement& renderer, const FloatSize& containerSize, float containerZoom)
{
if (!hasCachedImage())
return;
cachedImage()->setContainerContextForClient(renderer, LayoutSize(containerSize), containerZoom, m_originalURL);
}
bool StyleCursorImage::usesDataProtocol() const
{
return m_originalURL.protocolIsData();
}
} // namespace WebCore
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