129 lines
5.1 KiB
C++
129 lines
5.1 KiB
C++
/*
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* Copyright (C) 2006 Rob Buis <buis@kde.org>
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* (C) 2008 Nikolas Zimmermann <zimmermann@kde.org>
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* Copyright (C) 2008-2021 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "CSSCursorImageValue.h"
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#include "CSSImageSetValue.h"
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#include "CSSImageValue.h"
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#include "SVGCursorElement.h"
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#include "SVGLengthContext.h"
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#include "SVGURIReference.h"
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#include "StyleBuilderState.h"
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#include <wtf/MathExtras.h>
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#include <wtf/text/WTFString.h>
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namespace WebCore {
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CSSCursorImageValue::CSSCursorImageValue(Ref<CSSValue>&& imageValue, const std::optional<IntPoint>& hotSpot, LoadedFromOpaqueSource loadedFromOpaqueSource)
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: CSSValue(CursorImageClass)
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, m_imageValue(WTFMove(imageValue))
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, m_hotSpot(hotSpot)
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, m_loadedFromOpaqueSource(loadedFromOpaqueSource)
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{
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if (is<CSSImageValue>(m_imageValue.get()))
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m_originalURL = downcast<CSSImageValue>(m_imageValue.get()).imageURL();
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}
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Ref<CSSCursorImageValue> CSSCursorImageValue::create(Ref<CSSValue>&& imageValue, const std::optional<IntPoint>& hotSpot, LoadedFromOpaqueSource loadedFromOpaqueSource)
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{
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return adoptRef(*new CSSCursorImageValue(WTFMove(imageValue), hotSpot, loadedFromOpaqueSource));
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}
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CSSCursorImageValue::~CSSCursorImageValue()
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{
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for (auto* element : m_cursorElements)
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element->removeClient(*this);
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}
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String CSSCursorImageValue::customCSSText() const
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{
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String text = m_imageValue.get().cssText();
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if (!m_hotSpot)
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return text;
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return makeString(text, ' ', m_hotSpot->x(), ' ', m_hotSpot->y());
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}
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// FIXME: Should this function take a TreeScope instead?
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SVGCursorElement* CSSCursorImageValue::updateCursorElement(const Document& document)
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{
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auto element = SVGURIReference::targetElementFromIRIString(m_originalURL.string(), document).element;
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if (!is<SVGCursorElement>(element))
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return nullptr;
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// FIXME: Not right to keep old cursor elements as clients. The new one should replace the old, not join it in a set.
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auto& cursorElement = downcast<SVGCursorElement>(*element);
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if (m_cursorElements.add(&cursorElement).isNewEntry) {
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cursorElementChanged(cursorElement);
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cursorElement.addClient(*this);
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}
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return &cursorElement;
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}
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void CSSCursorImageValue::cursorElementRemoved(SVGCursorElement& cursorElement)
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{
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// 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.
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m_cursorElements.remove(&cursorElement);
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}
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void CSSCursorImageValue::cursorElementChanged(SVGCursorElement& cursorElement)
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{
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// FIXME: Seems wrong that changing an old cursor element, one that that is no longer the target, changes the hot spot.
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// FIXME: This will override a hot spot that was specified in CSS, which is probably incorrect.
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// FIXME: Should we clamp from float to int instead of just casting here?
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SVGLengthContext lengthContext(nullptr);
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m_hotSpot = IntPoint {
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static_cast<int>(std::round(cursorElement.x().value(lengthContext))),
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static_cast<int>(std::round(cursorElement.y().value(lengthContext)))
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};
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// 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?
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}
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ImageWithScale CSSCursorImageValue::selectBestFitImage(const Document& document)
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{
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if (is<CSSImageSetValue>(m_imageValue.get()))
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return downcast<CSSImageSetValue>(m_imageValue.get()).selectBestFitImage(document);
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if (auto* cursorElement = updateCursorElement(document)) {
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auto location = document.completeURL(cursorElement->href());
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if (location != downcast<CSSImageValue>(m_imageValue.get()).imageURL())
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m_imageValue = CSSImageValue::create(WTFMove(location), m_loadedFromOpaqueSource);
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}
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return { m_imageValue.ptr() , 1 };
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}
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bool CSSCursorImageValue::equals(const CSSCursorImageValue& other) const
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{
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return m_hotSpot == other.m_hotSpot && compareCSSValue(m_imageValue, other.m_imageValue);
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}
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Ref<CSSCursorImageValue> CSSCursorImageValue::valueWithStylesResolved(Style::BuilderState& state)
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{
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auto imageValue = state.resolveImageStyles(m_imageValue.get());
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if (imageValue.ptr() == m_imageValue.ptr())
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return *this;
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return create(WTFMove(imageValue), m_hotSpot, m_loadedFromOpaqueSource);
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}
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} // namespace WebCore
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