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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-src/src/SVGCharHandler.hpp')
-rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-src/src/SVGCharHandler.hpp | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/src/SVGCharHandler.hpp b/Build/source/texk/dvisvgm/dvisvgm-src/src/SVGCharHandler.hpp new file mode 100644 index 00000000000..5bcd92a685a --- /dev/null +++ b/Build/source/texk/dvisvgm/dvisvgm-src/src/SVGCharHandler.hpp @@ -0,0 +1,107 @@ +/************************************************************************* +** SVGCharHandler.hpp ** +** ** +** This file is part of dvisvgm -- a fast DVI to SVG converter ** +** Copyright (C) 2005-2017 Martin Gieseking <martin.gieseking@uos.de> ** +** ** +** This program is free software; you can redistribute it and/or ** +** modify it under the terms of the GNU General Public License as ** +** published by the Free Software Foundation; either version 3 of ** +** the License, or (at your option) any later version. ** +** ** +** This program is distributed in the hope that it will be useful, but ** +** WITHOUT ANY WARRANTY; without even the implied warranty of ** +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ** +** GNU General Public License for more details. ** +** ** +** You should have received a copy of the GNU General Public License ** +** along with this program; if not, see <http://www.gnu.org/licenses/>. ** +*************************************************************************/ + +#ifndef SVGCHARHANDLER_HPP +#define SVGCHARHANDLER_HPP + +#include <stack> +#include "Color.hpp" +#include "Font.hpp" +#include "Matrix.hpp" + + +template <typename T> +class CharProperty { + public: + CharProperty (const T &v) : _value(v), _changed(false) {} + + void set (const T &v) { + if (v != _value) { + _value = v; + _changed = true; + } + } + + const T& get () const {return _value;} + operator const T& () const {return _value;} + bool changed () const {return _changed;} + void changed (bool c) {_changed = c;} + + private: + T _value; + bool _changed; +}; + + +class XMLElementNode; + + +/** Base class for all character handlers. These handlers create SVG representations + * for the added characters and append them to the SVG tree. */ +class SVGCharHandler { + public: + SVGCharHandler () : _color(Color::BLACK), _font(0), _fontnum(0), _matrix(1), _vertical(false), _initialContextNode(0) {} + virtual ~SVGCharHandler() =default; + virtual void setInitialContextNode (XMLElementNode *node); + virtual void appendChar (uint32_t c, double x, double y) =0; + virtual void notifyXAdjusted () {} + virtual void notifyYAdjusted () {} + void setColor (const Color &color) {_color.set(color);} + void setFont (const Font &font, int id) {_font.set(&font); _fontnum = id;} + void setMatrix (const Matrix &matrix) {_matrix.set(matrix);} + void setVertical (bool vertical) {_vertical.set(vertical);} + Color getColor () const {return _color.get();} + const Font* getFont () const {return _font.get();} + const Matrix& getMatrix () const {return _matrix.get();} + + protected: + virtual void resetContextNode (); + void pushContextNode (XMLElementNode *node); + void popContextNode (); + + XMLElementNode* contextNode () const { + return _contextNodeStack.empty() ? _initialContextNode : _contextNodeStack.top(); + } + + CharProperty<Color> _color; ///< current color + CharProperty<const Font*> _font; ///< current font + int _fontnum; ///< current font ID + CharProperty<Matrix> _matrix; ///< current transformation + CharProperty<bool> _vertical; ///< current writing mode + + private: + XMLElementNode *_initialContextNode; ///< SVG element the generated character nodes are attached to + std::stack<XMLElementNode*> _contextNodeStack; +}; + + +/** Base class for all character handlers that create SVG <text> elements. */ +class SVGCharTextHandler : public SVGCharHandler { + public: + SVGCharTextHandler (bool selectFontByClass) : _selectFontByClass(selectFontByClass) {} + + protected: + XMLElementNode* createTextNode (double x, double y) const; + + private: + bool _selectFontByClass; +}; + +#endif |