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/*
* Copyright (c) 2020, Matthew Olsson <matthewcolsson@gmail.com>
* All rights reserved.
*
* 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR 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.
*/
#pragma once
#include <LibGfx/Bitmap.h>
#include <LibWeb/HTML/HTMLElement.h>
#include <LibWeb/SVG/SVGGeometryElement.h>
namespace Web::SVG {
enum class PathInstructionType {
Move,
ClosePath,
Line,
HorizontalLine,
VerticalLine,
Curve,
SmoothCurve,
QuadraticBezierCurve,
SmoothQuadraticBezierCurve,
EllipticalArc,
Invalid,
};
struct PathInstruction {
PathInstructionType type;
bool absolute;
Vector<float> data;
};
class PathDataParser final {
public:
PathDataParser(const String& source);
~PathDataParser() = default;
Vector<PathInstruction> parse();
private:
void parse_drawto();
void parse_moveto();
void parse_closepath();
void parse_lineto();
void parse_horizontal_lineto();
void parse_vertical_lineto();
void parse_curveto();
void parse_smooth_curveto();
void parse_quadratic_bezier_curveto();
void parse_smooth_quadratic_bezier_curveto();
void parse_elliptical_arc();
float parse_coordinate();
Vector<float> parse_coordinate_pair();
Vector<float> parse_coordinate_sequence();
Vector<Vector<float>> parse_coordinate_pair_sequence();
Vector<float> parse_coordinate_pair_double();
Vector<float> parse_coordinate_pair_triplet();
Vector<float> parse_elliptical_arg_argument();
void parse_whitespace(bool must_match_once = false);
void parse_comma_whitespace();
float parse_fractional_constant();
float parse_number();
float parse_flag();
// -1 if negative, +1 otherwise
int parse_sign();
bool match_whitespace() const;
bool match_comma_whitespace() const;
bool match_coordinate() const;
bool match(char c) const { return !done() && ch() == c; }
bool done() const { return m_cursor >= m_source.length(); }
char ch() const { return m_source[m_cursor]; }
char consume() { return m_source[m_cursor++]; }
String m_source;
size_t m_cursor { 0 };
Vector<PathInstruction> m_instructions;
};
class SVGPathElement final : public SVGGeometryElement {
public:
using WrapperType = Bindings::SVGPathElementWrapper;
SVGPathElement(DOM::Document&, const QualifiedName& qualified_name);
virtual ~SVGPathElement() override = default;
virtual RefPtr<Layout::Node> create_layout_node() override;
virtual void parse_attribute(const FlyString& name, const String& value) override;
Gfx::Path& get_path();
private:
Vector<PathInstruction> m_instructions;
Gfx::FloatPoint m_previous_control_point = {};
Optional<Gfx::Path> m_path;
};
}
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