/usr/include/octave-3.8.1/octave/txt-eng.h is in liboctave-dev 3.8.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright (C) 2009-2013 Michael Goffioul
This file is part of Octave.
Octave 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.
Octave 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 Octave; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>.
*/
#if ! defined (txt_eng_h)
#define txt_eng_h 1
#include <memory>
#include <string>
#include "base-list.h"
#include "caseless-str.h"
#include "dMatrix.h"
class text_element;
class text_element_string;
class text_element_symbol;
class text_element_list;
class text_element_subscript;
class text_element_superscript;
class text_element_combined;
class text_element_fontname;
class text_element_fontsize;
class text_element_fontstyle;
class text_element_color;
class text_processor;
class
OCTINTERP_API
text_element
{
public:
text_element (void) { }
virtual ~text_element (void) { }
virtual void accept (text_processor& p) = 0;
private:
text_element (const text_element&);
};
class
OCTINTERP_API
text_element_string : public text_element
{
public:
text_element_string (const std::string& s = "")
: text_element (), str (s) { }
~text_element_string (void) { }
std::string string_value (void) const { return str; }
void accept (text_processor& p);
private:
std::string str;
private:
text_element_string (const text_element_string &);
};
class
OCTINTERP_API
text_element_symbol : public text_element
{
public:
enum { invalid_code = 0xFFFFFFFFU };
public:
text_element_symbol (int sym)
: text_element (), symbol (sym) { }
~text_element_symbol (void) { }
int get_symbol (void) const { return symbol; }
uint32_t get_symbol_code (void) const;
void accept (text_processor& p);
private:
int symbol;
};
class
OCTINTERP_API
text_element_list
: public text_element, public octave_base_list<text_element *>
{
public:
text_element_list (void)
: text_element (), octave_base_list<text_element*> () { }
text_element_list (text_element* e)
: text_element (), octave_base_list<text_element*> ()
{ push_back (e); }
~text_element_list (void)
{
while (! empty ())
{
iterator it = begin ();
delete (*it);
erase (it);
}
}
void accept (text_processor& p);
};
class
OCTINTERP_API
text_element_subscript : public text_element
{
public:
text_element_subscript (text_element* e)
: text_element (), elem (e) { }
text_element_subscript (char c)
: text_element ()
{ elem = new text_element_string (std::string (1, c)); }
~text_element_subscript (void)
{ delete elem; }
void accept (text_processor& p);
text_element* get_element (void) { return elem; }
private:
text_element* elem;
private:
text_element_subscript (void);
};
class
OCTINTERP_API
text_element_superscript : public text_element
{
public:
text_element_superscript (text_element* e)
: text_element (), elem (e) { }
text_element_superscript (char c)
: text_element ()
{ elem = new text_element_string (std::string (1, c)); }
~text_element_superscript (void)
{ delete elem; }
void accept (text_processor& p);
text_element* get_element (void) { return elem; }
private:
text_element* elem;
private:
text_element_superscript (void);
};
class
OCTINTERP_API
text_element_combined : public text_element_list
{
public:
text_element_combined (text_element* e)
: text_element_list (e) { }
text_element_combined (text_element* e1, text_element* e2)
: text_element_list(e1)
{ push_back (e2); }
void accept (text_processor& p);
};
class
OCTINTERP_API
text_element_fontstyle : public text_element
{
public:
enum fontstyle
{
normal,
bold,
italic,
oblique
};
text_element_fontstyle (fontstyle st)
: text_element (), style (st) { }
~text_element_fontstyle (void) { }
fontstyle get_fontstyle (void) const { return style; }
void accept (text_processor& p);
private:
fontstyle style;
private:
text_element_fontstyle (void);
};
class
OCTINTERP_API
text_element_fontname : public text_element
{
public:
text_element_fontname (const std::string& fname)
: text_element (), name (fname) { }
~text_element_fontname (void) { }
const std::string& get_fontname (void) const { return name; }
void accept (text_processor& p);
private:
std::string name;
private:
text_element_fontname (void);
};
class
OCTINTERP_API
text_element_fontsize : public text_element
{
public:
text_element_fontsize (double fsize)
: text_element (), size (fsize) { }
~text_element_fontsize (void) { }
double get_fontsize (void) const { return size; }
void accept (text_processor& p);
private:
double size;
private:
text_element_fontsize (void);
};
class
OCTINTERP_API
text_element_color : public text_element
{
public:
text_element_color (double r, double g, double b)
: text_element (), rgb (1, 3, 0.0)
{
rgb(0) = r;
rgb(1) = g;
rgb(2) = b;
}
text_element_color (const std::string& cname)
: text_element (), rgb (1, 3, 0.0)
{
#define ASSIGN_COLOR(r,g,b) { rgb(0) = r; rgb(1) = g; rgb(2) = b; }
if (cname == "red") ASSIGN_COLOR(1, 0, 0)
else if (cname == "green") ASSIGN_COLOR(0, 1, 0)
else if (cname == "yellow") ASSIGN_COLOR(1, 1, 0)
else if (cname == "magenta") ASSIGN_COLOR(1, 0, 1)
else if (cname == "blue") ASSIGN_COLOR(0, 0, 1)
else if (cname == "black") ASSIGN_COLOR(0, 0, 0)
else if (cname == "white") ASSIGN_COLOR(1, 1, 1)
else if (cname == "gray") ASSIGN_COLOR(.5, .5, .5)
else if (cname == "darkGreen") ASSIGN_COLOR(0, .5, 0)
else if (cname == "orange") ASSIGN_COLOR(1, .65, 0)
else if (cname == "lightBlue") ASSIGN_COLOR(0.68, .85, .9)
#undef ASSIGN_COLOR
}
~text_element_color (void) { }
Matrix get_color (void) { return rgb; }
void accept (text_processor& p);
private:
Matrix rgb;
};
class
OCTINTERP_API
text_processor
{
public:
virtual void visit (text_element_string& e) = 0;
virtual void visit (text_element_symbol&) { }
virtual void visit (text_element_list& e)
{
for (text_element_list::iterator it = e.begin ();
it != e.end (); ++it)
{
(*it)->accept (*this);
}
}
virtual void visit (text_element_subscript& e)
{ e.get_element ()->accept (*this); }
virtual void visit (text_element_superscript& e)
{ e.get_element ()->accept (*this); }
virtual void visit (text_element_combined&) { }
virtual void visit (text_element_fontstyle&) { }
virtual void visit (text_element_fontname&) { }
virtual void visit (text_element_fontsize&) { }
virtual void visit (text_element_color&) { }
virtual void reset (void) { }
protected:
text_processor (void) { }
virtual ~text_processor (void) { }
};
#define TEXT_ELEMENT_ACCEPT(cls) \
inline void \
cls::accept (text_processor& p) \
{ p.visit (*this); }
TEXT_ELEMENT_ACCEPT(text_element_string)
TEXT_ELEMENT_ACCEPT(text_element_symbol)
TEXT_ELEMENT_ACCEPT(text_element_list)
TEXT_ELEMENT_ACCEPT(text_element_subscript)
TEXT_ELEMENT_ACCEPT(text_element_superscript)
TEXT_ELEMENT_ACCEPT(text_element_combined)
TEXT_ELEMENT_ACCEPT(text_element_fontstyle)
TEXT_ELEMENT_ACCEPT(text_element_fontname)
TEXT_ELEMENT_ACCEPT(text_element_fontsize)
TEXT_ELEMENT_ACCEPT(text_element_color)
class
OCTINTERP_API
text_parser
{
public:
text_parser (void) { }
virtual ~text_parser (void) { }
virtual text_element* parse (const std::string& s) = 0;
public:
static text_element* parse (const std::string& s,
const caseless_str& interpreter);
};
class
OCTINTERP_API
text_parser_none : public text_parser
{
public:
text_parser_none (void) : text_parser () { }
~text_parser_none (void) { }
// FIXME: is it possible to use reference counting to manage the
// memory for the object returned by the text parser? That would be
// preferable to having to know when and where to delete the object it
// creates...
text_element* parse (const std::string& s)
{
return new text_element_string (s);
}
};
class
OCTINTERP_API
text_parser_tex : public text_parser
{
public:
text_parser_tex (void)
: text_parser (), scanner (0), buffer_state (0), result (0)
{ }
~text_parser_tex (void)
{ destroy_lexer (); }
text_element* parse (const std::string& s);
void* get_scanner (void) { return scanner; }
void set_parse_result (text_element* e) { result = e; }
text_element* get_parse_result (void) { return result; }
private:
bool init_lexer (const std::string& s);
void destroy_lexer (void);
private:
void* scanner;
void* buffer_state;
text_element* result;
};
inline text_element*
text_parser::parse (const std::string& s, const caseless_str& interpreter)
{
std::auto_ptr<text_parser> parser;
if (interpreter.compare ("tex"))
parser.reset (new text_parser_tex ());
else
parser.reset (new text_parser_none ());
return parser->parse (s);
}
#endif
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