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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/core/style/style_path.h"
#include <limits>
#include <memory>
#include <utility>
#include "third_party/blink/renderer/core/css/css_path_value.h"
#include "third_party/blink/renderer/core/svg/svg_path_utilities.h"
#include "third_party/blink/renderer/platform/geometry/path_builder.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/transforms/affine_transform.h"
namespace blink {
const StylePath* StylePath::EmptyPath() {
DEFINE_STATIC_LOCAL(Persistent<StylePath>, empty_path,
(MakeGarbageCollected<StylePath>(SVGPathByteStream())));
return empty_path.Get();
}
const Path& StylePath::GetPath() const {
if (!path_) {
path_ = BuildPathFromByteStream(byte_stream_, wind_rule_);
}
return *path_;
}
float StylePath::length() const {
if (std::isnan(path_length_)) {
path_length_ = GetPath().length();
}
return path_length_;
}
bool StylePath::IsClosed() const {
return GetPath().IsClosed();
}
CSSValue* StylePath::ComputedCSSValue() const {
return MakeGarbageCollected<cssvalue::CSSPathValue>(
const_cast<StylePath*>(this), kTransformToAbsolute);
}
bool StylePath::IsEqualAssumingSameType(const BasicShape& o) const {
const StylePath& other = To<StylePath>(o);
return wind_rule_ == other.wind_rule_ && byte_stream_ == other.byte_stream_;
}
Path StylePath::GetPath(const gfx::RectF& offset_rect,
float zoom,
float path_scale) const {
const Path& path = GetPath();
const AffineTransform transform =
AffineTransform::Translation(offset_rect.x(), offset_rect.y())
.Scale(zoom * path_scale);
return transform.IsIdentity()
? path
: PathBuilder(path).Transform(transform).Finalize();
}
} // namespace blink
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