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104 lines
2.6 KiB
C++
104 lines
2.6 KiB
C++
/*
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* Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibGfx/Bitmap.h>
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#include <LibWeb/HTML/HTMLElement.h>
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#include <LibWeb/SVG/SVGGeometryElement.h>
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namespace Web::SVG {
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enum class PathInstructionType {
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Move,
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ClosePath,
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Line,
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HorizontalLine,
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VerticalLine,
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Curve,
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SmoothCurve,
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QuadraticBezierCurve,
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SmoothQuadraticBezierCurve,
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EllipticalArc,
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Invalid,
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};
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struct PathInstruction {
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PathInstructionType type;
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bool absolute;
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Vector<float> data;
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};
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class PathDataParser final {
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public:
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PathDataParser(const String& source);
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~PathDataParser() = default;
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Vector<PathInstruction> parse();
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private:
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void parse_drawto();
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void parse_moveto();
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void parse_closepath();
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void parse_lineto();
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void parse_horizontal_lineto();
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void parse_vertical_lineto();
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void parse_curveto();
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void parse_smooth_curveto();
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void parse_quadratic_bezier_curveto();
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void parse_smooth_quadratic_bezier_curveto();
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void parse_elliptical_arc();
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float parse_coordinate();
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Vector<float> parse_coordinate_pair();
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Vector<float> parse_coordinate_sequence();
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Vector<Vector<float>> parse_coordinate_pair_sequence();
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Vector<float> parse_coordinate_pair_double();
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Vector<float> parse_coordinate_pair_triplet();
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Vector<float> parse_elliptical_arg_argument();
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void parse_whitespace(bool must_match_once = false);
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void parse_comma_whitespace();
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float parse_fractional_constant();
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float parse_number();
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float parse_flag();
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// -1 if negative, +1 otherwise
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int parse_sign();
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bool match_whitespace() const;
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bool match_comma_whitespace() const;
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bool match_coordinate() const;
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bool match(char c) const { return !done() && ch() == c; }
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bool done() const { return m_cursor >= m_source.length(); }
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char ch() const { return m_source[m_cursor]; }
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char consume() { return m_source[m_cursor++]; }
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String m_source;
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size_t m_cursor { 0 };
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Vector<PathInstruction> m_instructions;
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};
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class SVGPathElement final : public SVGGeometryElement {
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public:
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using WrapperType = Bindings::SVGPathElementWrapper;
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SVGPathElement(DOM::Document&, QualifiedName);
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virtual ~SVGPathElement() override = default;
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virtual RefPtr<Layout::Node> create_layout_node() override;
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virtual void parse_attribute(const FlyString& name, const String& value) override;
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Gfx::Path& get_path();
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private:
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Vector<PathInstruction> m_instructions;
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Gfx::FloatPoint m_previous_control_point = {};
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Optional<Gfx::Path> m_path;
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};
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}
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