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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 "StyleCalculationTree+Evaluation.h"
#include "CSSCalcExecutor.h"
#include "StyleCalculationTree.h"
#include "StyleZoomPrimitives.h"
#include <wtf/StdLibExtras.h>
namespace WebCore {
namespace Style {
namespace Calculation {
static auto evaluate(const CSS::Keyword::None&, double percentResolutionLength, const ZoomFactor&) -> CSS::Keyword::None;
static auto evaluate(const ChildOrNone&, double percentResolutionLength, const ZoomFactor&) -> Variant<double, CSS::Keyword::None>;
static auto evaluate(const std::optional<Child>&, double percentResolutionLength, const ZoomFactor&) -> std::optional<double>;
static auto evaluate(const Child&, double percentResolutionLength, const ZoomFactor&) -> double;
static auto evaluate(const Number&, double percentResolutionLength, const ZoomFactor&) -> double;
static auto evaluate(const Percentage&, double percentResolutionLength, const ZoomFactor&) -> double;
static auto evaluate(const Dimension&, double percentResolutionLength, const ZoomFactor&) -> double;
static auto evaluate(const IndirectNode<Sum>&, double percentResolutionLength, const ZoomFactor&) -> double;
static auto evaluate(const IndirectNode<Product>&, double percentResolutionLength, const ZoomFactor&) -> double;
static auto evaluate(const IndirectNode<Min>&, double percentResolutionLength, const ZoomFactor&) -> double;
static auto evaluate(const IndirectNode<Max>&, double percentResolutionLength, const ZoomFactor&) -> double;
static auto evaluate(const IndirectNode<Hypot>&, double percentResolutionLength, const ZoomFactor&) -> double;
static auto evaluate(const IndirectNode<Random>&, double percentResolutionLength, const ZoomFactor&) -> double;
static auto evaluate(const IndirectNode<Blend>&, double percentResolutionLength, const ZoomFactor&) -> double;
template<typename Op>
static auto evaluate(const IndirectNode<Op>&, double percentResolutionLength, const ZoomFactor&) -> double;
template<typename Op, typename... Args> static double executeMathOperation(Args&&... args)
{
return CSSCalc::executeOperation<Op::op>(std::forward<Args>(args)...);
}
// MARK: Evaluation.
CSS::Keyword::None evaluate(const CSS::Keyword::None& root, double, const ZoomFactor&)
{
return root;
}
Variant<double, CSS::Keyword::None> evaluate(const ChildOrNone& root, double percentResolutionLength, const ZoomFactor& usedZoom)
{
return WTF::switchOn(root, [&](const auto& root) {
return Variant<double, CSS::Keyword::None> { evaluate(root, percentResolutionLength, usedZoom) };
});
}
double evaluate(const Child& root, double percentResolutionLength, const ZoomFactor& usedZoom)
{
return WTF::switchOn(root, [&](const auto& root) {
return evaluate(root, percentResolutionLength, usedZoom);
});
}
std::optional<double> evaluate(const std::optional<Child>& root, double percentResolutionLength, const ZoomFactor& usedZoom)
{
if (root)
return static_cast<double>(evaluate(*root, percentResolutionLength, usedZoom));
return std::nullopt;
}
double evaluate(const Number& number, double, const ZoomFactor& usedZoom)
{
return number.value * usedZoom.value;
}
double evaluate(const Percentage& percentage, double percentResolutionLength, const ZoomFactor&)
{
return percentResolutionLength * percentage.value / 100.0;
}
double evaluate(const Dimension& root, double, const ZoomFactor& usedZoom)
{
return root.value * usedZoom.value;
}
double evaluate(const IndirectNode<Sum>& root, double percentResolutionLength, const ZoomFactor& usedZoom)
{
return executeMathOperation<Sum>(root->children.value, [&](const auto& child) -> double {
return evaluate(child, percentResolutionLength, usedZoom);
});
}
double evaluate(const IndirectNode<Product>& root, double percentResolutionLength, const ZoomFactor& usedZoom)
{
return executeMathOperation<Product>(root->children.value, [&](const auto& child) -> double {
return evaluate(child, percentResolutionLength, usedZoom);
});
}
double evaluate(const IndirectNode<Min>& root, double percentResolutionLength, const ZoomFactor& usedZoom)
{
return executeMathOperation<Min>(root->children.value, [&](const auto& child) -> double {
return evaluate(child, percentResolutionLength, usedZoom);
});
}
double evaluate(const IndirectNode<Max>& root, double percentResolutionLength, const ZoomFactor& usedZoom)
{
return executeMathOperation<Max>(root->children.value, [&](const auto& child) -> double {
return evaluate(child, percentResolutionLength, usedZoom);
});
}
double evaluate(const IndirectNode<Hypot>& root, double percentResolutionLength, const ZoomFactor& usedZoom)
{
return executeMathOperation<Hypot>(root->children.value, [&](const auto& child) -> double {
return evaluate(child, percentResolutionLength, usedZoom);
});
}
double evaluate(const IndirectNode<Random>& root, double percentResolutionLength, const ZoomFactor& usedZoom)
{
auto min = evaluate(root->min, percentResolutionLength, usedZoom);
auto max = evaluate(root->max, percentResolutionLength, usedZoom);
auto step = evaluate(root->step, percentResolutionLength, usedZoom);
return executeMathOperation<Random>(root->fixed.baseValue, min, max, step);
}
double evaluate(const IndirectNode<Blend>& root, double percentResolutionLength, const ZoomFactor& usedZoom)
{
return (1.0 - root->progress) * evaluate(root->from, percentResolutionLength, usedZoom) + root->progress * evaluate(root->to, percentResolutionLength, usedZoom);
}
template<typename Op> double evaluate(const IndirectNode<Op>& root, double percentResolutionLength, const ZoomFactor& usedZoom)
{
return WTF::apply([&](const auto& ...x) {
return executeMathOperation<Op>(evaluate(x, percentResolutionLength, usedZoom)...);
} , *root);
}
double evaluate(const Tree& tree, double percentResolutionLength, const ZoomFactor& zoomFactor)
{
return evaluate(tree.root, percentResolutionLength, zoomFactor);
}
double evaluate(const Tree& tree, double percentResolutionLength, const ZoomNeeded&)
{
return evaluate(tree.root, percentResolutionLength, Style::ZoomFactor { 1.0f, 1.0f });
}
} // namespace Calculation
} // namespace Style
} // namespace WebCore
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