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/*
* Copyright (C) 2024 Samuel Weinig <sam@webkit.org>
*
* 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. ``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
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* 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"
#include "CSSCalcTree+ContainerProgressEvaluator.h"
#include "CSSCalcTree.h"
#include "ContainerQueryEvaluator.h"
#include "ContainerQueryFeatures.h"
#include "RenderBox.h"
namespace WebCore {
namespace CSSCalc {
std::optional<double> evaluateContainerProgress(const ContainerProgress& root, const Element& initialElement, const CSSToLengthConversionData& conversionData)
{
// FIXME: This lookup loop is the same as the one used in CSSPrimitiveValue for resolving container units. Would be good to figure out a nice place to share this.
RefPtr element = &initialElement;
auto mode = conversionData.style()->pseudoElementType() == PseudoId::None
? Style::ContainerQueryEvaluator::SelectionMode::Element
: Style::ContainerQueryEvaluator::SelectionMode::PseudoElement;
while ((element = Style::ContainerQueryEvaluator::selectContainer({ }, root.container, *element, mode))) {
auto* containerRenderer = dynamicDowncast<RenderBox>(element->renderer());
if (containerRenderer && containerRenderer->hasEligibleContainmentForSizeQuery())
return root.feature->valueInCanonicalUnits(*containerRenderer);
// For pseudo-elements the element itself can be the container. Avoid looping forever.
mode = Style::ContainerQueryEvaluator::SelectionMode::Element;
}
// "If no appropriate containers are found, container-progress() resolves its <size-feature> query against the small viewport size."
auto view = conversionData.renderView();
if (!view)
return { };
return root.feature->valueInCanonicalUnits(*view, *conversionData.style());
}
} // namespace CSSCalc
} // namespace WebCore
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