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annotate libinterp/corefcn/text-engine.h @ 30123:fa65184b7c76

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maint: use "m_" prefix for member variables in text-engine classes. * oct-tex-lexer.in.ll, oct-tex-parser.yy, text-engine.cc, text-engine.h: use "m_" prefix for member variables in text-engine classes.
author Rik <rik@octave.org>
date Mon, 06 Sep 2021 11:06:00 -0700
parents 2ae4764180c6
children a61e1a0f6024
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2009-2021 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if ! defined (octave_text_engine_h)
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27 #define octave_text_engine_h 1
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28
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29 #include "octave-config.h"
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30
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31 #include <memory>
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32 #include <string>
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33
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34 #include "base-list.h"
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35 #include "caseless-str.h"
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36 #include "dMatrix.h"
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37
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38 namespace octave
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39 {
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40 class text_element;
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41 class text_element_string;
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42 class text_element_symbol;
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43 class text_element_list;
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44 class text_element_subscript;
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45 class text_element_superscript;
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46 class text_element_combined;
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47 class text_element_fontname;
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48 class text_element_fontsize;
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49 class text_element_fontstyle;
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50 class text_element_color;
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51
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52 class text_processor;
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53
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54 class
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55 OCTINTERP_API
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56 text_element
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57 {
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58 public:
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59 text_element (void) { }
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60
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61 virtual ~text_element (void) = default;
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62
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63 virtual void accept (text_processor& p) = 0;
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64
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65 private:
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66 text_element (const text_element&);
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67 };
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68
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69 class
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70 OCTINTERP_API
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71 text_element_string : public text_element
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72 {
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73 public:
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74 text_element_string (const std::string& s = "")
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75 : text_element (), m_str (s) { }
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76
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77 ~text_element_string (void) = default;
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78
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79 std::string string_value (void) const { return m_str; }
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80
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81 void accept (text_processor& p);
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82
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83 private:
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84 text_element_string (const text_element_string &);
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85
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86 //--------
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87
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88 std::string m_str;
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89 };
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90
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91 class
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92 OCTINTERP_API
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93 text_element_symbol : public text_element
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94 {
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95 public:
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96 enum { invalid_code = 0xFFFFFFFFU };
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97
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98 text_element_symbol (int sym)
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99 : text_element (), m_symbol (sym) { }
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100
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101 ~text_element_symbol (void) = default;
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102
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103 int get_symbol (void) const { return m_symbol; }
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104
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105 uint32_t get_symbol_code (void) const;
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106
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107 void accept (text_processor& p);
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108
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109 private:
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110 int m_symbol;
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111 };
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112
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113 class
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114 OCTINTERP_API
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115 text_element_list
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116 : public text_element, public base_list<text_element *>
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117 {
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118 public:
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119 text_element_list (void)
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120 : text_element (), base_list<text_element*> () { }
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121
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122 text_element_list (text_element *e)
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123 : text_element (), base_list<text_element*> ()
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124 {
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125 push_back (e);
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126 }
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127
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128 ~text_element_list (void)
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129 {
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130 while (! empty ())
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131 {
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132 auto it = begin ();
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133 delete (*it);
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134 erase (it);
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135 }
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136 }
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137
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138 void accept (text_processor& p);
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139 };
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140
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141 class
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142 OCTINTERP_API
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143 text_element_subscript : public text_element
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144 {
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145 public:
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146 text_element_subscript (text_element *e)
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147 : text_element (), m_elem (e) { }
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148
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149 text_element_subscript (char c)
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150 : text_element ()
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151 { m_elem = new text_element_string (std::string (1, c)); }
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152
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153 ~text_element_subscript (void)
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154 { delete m_elem; }
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155
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156 void accept (text_processor& p);
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157
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158 text_element * get_element (void) { return m_elem; }
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159
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160 private:
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161 text_element_subscript (void);
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162
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163 //--------
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164
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165 text_element *m_elem;
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166
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167 };
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168
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169 class
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170 OCTINTERP_API
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171 text_element_superscript : public text_element
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172 {
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173 public:
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174 text_element_superscript (text_element *e)
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175 : text_element (), m_elem (e) { }
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176
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177 text_element_superscript (char c)
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178 : text_element ()
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179 { m_elem = new text_element_string (std::string (1, c)); }
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180
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181 ~text_element_superscript (void)
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182 { delete m_elem; }
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183
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184 void accept (text_processor& p);
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185
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186 text_element * get_element (void) { return m_elem; }
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187
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188 private:
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189 text_element_superscript (void);
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190
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191 //--------
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192
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193 text_element *m_elem;
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194
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195 };
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196
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197 class
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198 OCTINTERP_API
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199 text_element_combined : public text_element_list
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200 {
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201 public:
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202 text_element_combined (text_element *e)
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203 : text_element_list (e) { }
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204
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205 text_element_combined (text_element *e1, text_element *e2)
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206 : text_element_list(e1)
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207 { push_back (e2); }
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208
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209 void accept (text_processor& p);
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210 };
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211
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212 class
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213 OCTINTERP_API
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214 text_element_fontstyle : public text_element
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215 {
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216 public:
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217 enum fontstyle
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218 {
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219 normal,
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220 bold,
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221 italic,
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222 oblique
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223 };
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224
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225 text_element_fontstyle (fontstyle st)
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226 : text_element (), m_style (st) { }
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227
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228 ~text_element_fontstyle (void) = default;
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229
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230 fontstyle get_fontstyle (void) const { return m_style; }
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231
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232 void accept (text_processor& p);
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233
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234 private:
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235 text_element_fontstyle (void);
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236
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237 //--------
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238
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239 fontstyle m_style;
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240
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241 };
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242
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243 class
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244 OCTINTERP_API
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245 text_element_fontname : public text_element
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246 {
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247 public:
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248 text_element_fontname (const std::string& fname)
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249 : text_element (), m_name (fname) { }
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250
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251 ~text_element_fontname (void) = default;
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252
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253 const std::string& get_fontname (void) const { return m_name; }
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254
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255 void accept (text_processor& p);
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256
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257 private:
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258 text_element_fontname (void);
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259
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260 //--------
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261
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262 std::string m_name;
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263
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264 };
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265
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266 class
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267 OCTINTERP_API
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268 text_element_fontsize : public text_element
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269 {
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270 public:
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271 text_element_fontsize (double fsize)
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272 : text_element (), m_size (fsize) { }
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273
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274 ~text_element_fontsize (void) = default;
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275
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276 double get_fontsize (void) const { return m_size; }
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277
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278 void accept (text_processor& p);
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279
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280 private:
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281 text_element_fontsize (void);
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282
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283 //--------
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284
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285 double m_size;
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286
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287 };
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288
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289 class
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290 OCTINTERP_API
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291 text_element_color : public text_element
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292 {
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293 public:
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294 text_element_color (double r, double g, double b)
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295 : text_element (), m_rgb (1, 3, 0.0)
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296 {
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297 m_rgb(0) = r;
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298 m_rgb(1) = g;
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299 m_rgb(2) = b;
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300 }
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301
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302 text_element_color (const std::string& cname)
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303 : text_element (), m_rgb (1, 3, 0.0)
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304 {
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305 #define ASSIGN_COLOR(r,g,b) { m_rgb(0) = r; m_rgb(1) = g; m_rgb(2) = b; }
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306 if (cname == "red") ASSIGN_COLOR(1, 0, 0)
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307 else if (cname == "green") ASSIGN_COLOR(0, 1, 0)
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308 else if (cname == "yellow") ASSIGN_COLOR(1, 1, 0)
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309 else if (cname == "magenta") ASSIGN_COLOR(1, 0, 1)
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310 else if (cname == "blue") ASSIGN_COLOR(0, 0, 1)
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311 else if (cname == "black") ASSIGN_COLOR(0, 0, 0)
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312 else if (cname == "white") ASSIGN_COLOR(1, 1, 1)
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313 else if (cname == "gray") ASSIGN_COLOR(.5, .5, .5)
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314 else if (cname == "darkGreen") ASSIGN_COLOR(0, .5, 0)
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315 else if (cname == "orange") ASSIGN_COLOR(1, .65, 0)
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316 else if (cname == "lightBlue") ASSIGN_COLOR(0.68, .85, .9)
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317 #undef ASSIGN_COLOR
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318 }
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319
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320 ~text_element_color (void) = default;
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321
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322 Matrix get_color (void) { return m_rgb; }
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323
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324 void accept (text_processor& p);
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325
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326 private:
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327 Matrix m_rgb;
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328 };
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329
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330 class
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331 OCTINTERP_API
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332 text_processor
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333 {
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334 public:
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335 virtual void visit (text_element_string&) { }
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336
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337 virtual void visit (text_element_symbol&) { }
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338
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339 virtual void visit (text_element_list& e)
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340 {
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341 for (auto& el_p : e)
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342 {
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343 el_p->accept (*this);
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344 }
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345 }
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346
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347 virtual void visit (text_element_subscript& e)
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348 { e.get_element ()->accept (*this); }
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349
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350 virtual void visit (text_element_superscript& e)
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351 { e.get_element ()->accept (*this); }
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352
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353 virtual void visit (text_element_combined&) { }
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354
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355 virtual void visit (text_element_fontstyle&) { }
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356
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357 virtual void visit (text_element_fontname&) { }
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358
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359 virtual void visit (text_element_fontsize&) { }
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360
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361 virtual void visit (text_element_color&) { }
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362
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363 virtual void reset (void) { }
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364
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365 protected:
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366 text_processor (void) { }
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367
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368 virtual ~text_processor (void) = default;
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369 };
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370
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371 #define TEXT_ELEMENT_ACCEPT(cls) \
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372 inline void \
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373 cls::accept (text_processor& p) \
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374 { \
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375 p.visit (*this); \
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376 }
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377
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378 TEXT_ELEMENT_ACCEPT(text_element_string)
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379 TEXT_ELEMENT_ACCEPT(text_element_symbol)
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380 TEXT_ELEMENT_ACCEPT(text_element_list)
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381 TEXT_ELEMENT_ACCEPT(text_element_subscript)
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382 TEXT_ELEMENT_ACCEPT(text_element_superscript)
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383 TEXT_ELEMENT_ACCEPT(text_element_combined)
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384 TEXT_ELEMENT_ACCEPT(text_element_fontstyle)
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385 TEXT_ELEMENT_ACCEPT(text_element_fontname)
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386 TEXT_ELEMENT_ACCEPT(text_element_fontsize)
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387 TEXT_ELEMENT_ACCEPT(text_element_color)
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388
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389 class
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390 OCTINTERP_API
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391 text_parser
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392 {
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393 public:
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394 text_parser (void) { }
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395
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396 virtual ~text_parser (void) = default;
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397
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398 virtual text_element * parse (const std::string& s) = 0;
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399
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400 public:
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401 static text_element * parse (const std::string& s,
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402 const caseless_str& interpreter);
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403 };
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404
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405 class
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406 OCTINTERP_API
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407 text_parser_none : public text_parser
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408 {
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409 public:
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410 text_parser_none (void) : text_parser () { }
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411
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412 ~text_parser_none (void) = default;
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413
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414 // FIXME: is it possible to use reference counting to manage the
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415 // memory for the object returned by the text parser? That would be
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416 // preferable to having to know when and where to delete the object it
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417 // creates...
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418
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419 text_element * parse (const std::string& s)
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420 {
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421 return new text_element_string (s);
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422 }
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423 };
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424
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425 class
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426 OCTINTERP_API
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427 text_parser_tex : public text_parser
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428 {
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429 public:
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430 text_parser_tex (void)
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431 : text_parser (), m_scanner (nullptr), m_buffer_state (nullptr),
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432 m_result (nullptr)
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433 { }
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434
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435 ~text_parser_tex (void)
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436 { destroy_lexer (); }
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437
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438 text_element * parse (const std::string& s);
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439
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440 void * get_scanner (void) { return m_scanner; }
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441
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442 void set_parse_result (text_element *e) { m_result = e; }
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443
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444 text_element * get_parse_result (void) { return m_result; }
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445
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446 private:
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447 bool init_lexer (const std::string& s);
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448
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449 void destroy_lexer (void);
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450
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451 //--------
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452
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453 void *m_scanner;
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454
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455 void *m_buffer_state;
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456
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457 text_element *m_result;
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458 };
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459
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460 inline text_element*
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461 text_parser::parse (const std::string& s, const caseless_str& interpreter)
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462 {
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463 std::unique_ptr<text_parser> parser;
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464
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465 if (interpreter.compare ("tex"))
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466 parser.reset (new text_parser_tex ());
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467 else
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468 parser.reset (new text_parser_none ());
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469
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470 return parser->parse (s);
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471 }
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472 }
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473
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474 #endif