Mercurial > octave
annotate libinterp/corefcn/text-engine.h @ 32633:4b601ca024d5
maint: merge stable to default
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 22 Dec 2023 12:14:08 -0500 |
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children | 0b5f3219b650 |
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1 //////////////////////////////////////////////////////////////////////// |
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2 // |
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3 // Copyright (C) 2009-2024 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 OCTAVE_BEGIN_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 OCTINTERP_API text_element |
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55 { |
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56 public: |
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57 |
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58 OCTAVE_DEFAULT_CONSTRUCT_COPY_MOVE (text_element) |
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59 |
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60 virtual ~text_element () = default; |
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61 |
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62 virtual void accept (text_processor& p) = 0; |
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63 }; |
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64 |
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65 class OCTINTERP_API text_element_string : public text_element |
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66 { |
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67 public: |
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68 |
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69 text_element_string (const std::string& s = "") |
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70 : text_element (), m_str (s) { } |
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71 |
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72 OCTAVE_DEFAULT_COPY_MOVE_DELETE (text_element_string) |
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73 |
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74 std::string string_value () const { return m_str; } |
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75 |
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76 void accept (text_processor& p); |
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77 |
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78 private: |
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79 |
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80 std::string m_str; |
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81 }; |
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82 |
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83 class OCTINTERP_API text_element_symbol : public text_element |
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84 { |
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85 public: |
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86 |
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87 enum { invalid_code = 0xFFFFFFFFU }; |
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88 |
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89 text_element_symbol () = delete; |
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90 |
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91 text_element_symbol (int sym) |
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92 : text_element (), m_symbol (sym) { } |
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93 |
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94 OCTAVE_DEFAULT_COPY_MOVE_DELETE (text_element_symbol) |
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95 |
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96 int get_symbol () const { return m_symbol; } |
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97 |
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98 uint32_t get_symbol_code () const; |
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99 |
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100 void accept (text_processor& p); |
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101 |
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102 private: |
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103 int m_symbol; |
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104 }; |
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105 |
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106 class OCTINTERP_API text_element_list |
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107 : public text_element, public base_list<text_element *> |
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108 { |
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109 public: |
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110 |
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111 OCTAVE_DEFAULT_CONSTRUCT_COPY_MOVE (text_element_list) |
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112 |
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113 text_element_list (text_element *e) |
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114 : text_element (), base_list<text_element*> () |
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115 { |
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116 push_back (e); |
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117 } |
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118 |
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119 ~text_element_list () |
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120 { |
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121 while (! empty ()) |
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122 { |
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123 auto it = begin (); |
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124 delete (*it); |
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125 erase (it); |
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126 } |
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127 } |
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128 |
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129 void accept (text_processor& p); |
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130 }; |
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131 |
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132 class OCTINTERP_API text_element_subscript : public text_element |
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133 { |
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134 public: |
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135 |
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136 OCTAVE_DISABLE_CONSTRUCT_COPY_MOVE (text_element_subscript) |
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137 |
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138 text_element_subscript (text_element *e) |
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139 : text_element (), m_elem (e) { } |
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140 |
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141 text_element_subscript (char c) |
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142 : text_element () |
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143 { m_elem = new text_element_string (std::string (1, c)); } |
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144 |
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145 ~text_element_subscript () |
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146 { delete m_elem; } |
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147 |
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148 void accept (text_processor& p); |
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149 |
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150 text_element * get_element () { return m_elem; } |
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151 |
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152 private: |
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153 |
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154 text_element *m_elem; |
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155 }; |
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156 |
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157 class OCTINTERP_API text_element_superscript : public text_element |
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158 { |
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159 public: |
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160 |
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161 OCTAVE_DISABLE_CONSTRUCT_COPY_MOVE (text_element_superscript) |
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162 |
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163 text_element_superscript (text_element *e) |
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164 : text_element (), m_elem (e) { } |
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165 |
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166 text_element_superscript (char c) |
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167 : text_element () |
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168 { m_elem = new text_element_string (std::string (1, c)); } |
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169 |
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170 ~text_element_superscript () |
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171 { delete m_elem; } |
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172 |
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173 void accept (text_processor& p); |
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174 |
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175 text_element * get_element () { return m_elem; } |
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176 |
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177 private: |
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178 |
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179 text_element *m_elem; |
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180 }; |
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181 |
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182 class OCTINTERP_API text_element_combined : public text_element_list |
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183 { |
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184 public: |
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185 |
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186 OCTAVE_DEFAULT_CONSTRUCT_COPY_MOVE_DELETE (text_element_combined) |
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187 |
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188 text_element_combined (text_element *e) |
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189 : text_element_list (e) { } |
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190 |
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191 text_element_combined (text_element *e1, text_element *e2) |
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192 : text_element_list(e1) |
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193 { push_back (e2); } |
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194 |
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195 void accept (text_processor& p); |
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196 }; |
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197 |
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198 class OCTINTERP_API text_element_fontstyle : public text_element |
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199 { |
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200 public: |
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201 |
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202 enum fontstyle |
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203 { |
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204 normal, |
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205 bold, |
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206 italic, |
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207 oblique |
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208 }; |
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209 |
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210 text_element_fontstyle () = delete; |
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211 |
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212 text_element_fontstyle (fontstyle st) |
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213 : text_element (), m_style (st) { } |
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214 |
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215 OCTAVE_DEFAULT_COPY_MOVE_DELETE (text_element_fontstyle) |
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216 |
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217 fontstyle get_fontstyle () const { return m_style; } |
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218 |
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219 void accept (text_processor& p); |
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220 |
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221 private: |
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222 |
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223 fontstyle m_style; |
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224 }; |
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225 |
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226 class OCTINTERP_API text_element_fontname : public text_element |
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227 { |
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228 public: |
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229 |
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230 text_element_fontname () = delete; |
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231 |
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232 text_element_fontname (const std::string& fname) |
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233 : text_element (), m_name (fname) { } |
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234 |
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235 OCTAVE_DEFAULT_COPY_MOVE_DELETE (text_element_fontname) |
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236 |
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237 const std::string& get_fontname () const { return m_name; } |
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238 |
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239 void accept (text_processor& p); |
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240 |
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241 private: |
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242 |
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243 std::string m_name; |
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244 }; |
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245 |
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246 class OCTINTERP_API text_element_fontsize : public text_element |
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247 { |
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248 public: |
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249 |
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250 text_element_fontsize () = delete; |
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251 |
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252 text_element_fontsize (double fsize) |
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253 : text_element (), m_size (fsize) { } |
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254 |
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255 OCTAVE_DEFAULT_COPY_MOVE_DELETE (text_element_fontsize) |
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256 |
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257 double get_fontsize () const { return m_size; } |
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258 |
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259 void accept (text_processor& p); |
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260 |
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261 private: |
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262 |
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263 double m_size; |
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264 }; |
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265 |
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266 class OCTINTERP_API text_element_color : public text_element |
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267 { |
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268 public: |
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269 |
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270 text_element_color () = delete; |
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271 |
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272 text_element_color (double r, double g, double b) |
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273 : text_element (), m_rgb (1, 3, 0.0) |
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274 { |
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275 m_rgb(0) = r; |
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276 m_rgb(1) = g; |
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277 m_rgb(2) = b; |
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278 } |
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279 |
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280 text_element_color (const std::string& cname) |
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281 : text_element (), m_rgb (1, 3, 0.0) |
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282 { |
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283 #define ASSIGN_COLOR(r,g,b) { m_rgb(0) = r; m_rgb(1) = g; m_rgb(2) = b; } |
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284 if (cname == "red") ASSIGN_COLOR(1, 0, 0) |
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285 else if (cname == "green") ASSIGN_COLOR(0, 1, 0) |
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286 else if (cname == "yellow") ASSIGN_COLOR(1, 1, 0) |
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287 else if (cname == "magenta") ASSIGN_COLOR(1, 0, 1) |
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288 else if (cname == "blue") ASSIGN_COLOR(0, 0, 1) |
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289 else if (cname == "black") ASSIGN_COLOR(0, 0, 0) |
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290 else if (cname == "white") ASSIGN_COLOR(1, 1, 1) |
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291 else if (cname == "gray") ASSIGN_COLOR(.5, .5, .5) |
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292 else if (cname == "darkGreen") ASSIGN_COLOR(0, .5, 0) |
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293 else if (cname == "orange") ASSIGN_COLOR(1, .65, 0) |
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294 else if (cname == "lightBlue") ASSIGN_COLOR(0.68, .85, .9) |
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295 #undef ASSIGN_COLOR |
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296 } |
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297 |
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298 OCTAVE_DEFAULT_COPY_MOVE_DELETE (text_element_color) |
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299 |
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300 Matrix get_color () { return m_rgb; } |
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301 |
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302 void accept (text_processor& p); |
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303 |
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304 private: |
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305 |
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306 Matrix m_rgb; |
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307 }; |
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308 |
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309 class OCTINTERP_API text_processor |
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310 { |
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311 public: |
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312 |
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313 virtual void visit (text_element_string&) { } |
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314 |
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315 virtual void visit (text_element_symbol&) { } |
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316 |
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317 virtual void visit (text_element_list& e) |
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318 { |
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319 for (auto& el_p : e) |
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320 { |
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321 el_p->accept (*this); |
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322 } |
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323 } |
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324 |
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325 virtual void visit (text_element_subscript& e) |
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326 { e.get_element ()->accept (*this); } |
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327 |
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328 virtual void visit (text_element_superscript& e) |
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329 { e.get_element ()->accept (*this); } |
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330 |
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331 virtual void visit (text_element_combined&) { } |
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332 |
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333 virtual void visit (text_element_fontstyle&) { } |
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334 |
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335 virtual void visit (text_element_fontname&) { } |
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336 |
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337 virtual void visit (text_element_fontsize&) { } |
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338 |
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339 virtual void visit (text_element_color&) { } |
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340 |
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341 virtual void reset () { } |
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342 |
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343 protected: |
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344 |
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345 OCTAVE_DEFAULT_CONSTRUCT_COPY_MOVE (text_processor) |
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346 |
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347 virtual ~text_processor () = default; |
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348 }; |
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349 |
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350 #define TEXT_ELEMENT_ACCEPT(cls) \ |
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351 inline void \ |
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352 cls::accept (text_processor& p) \ |
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353 { \ |
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354 p.visit (*this); \ |
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355 } |
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356 |
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357 TEXT_ELEMENT_ACCEPT(text_element_string) |
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358 TEXT_ELEMENT_ACCEPT(text_element_symbol) |
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359 TEXT_ELEMENT_ACCEPT(text_element_list) |
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360 TEXT_ELEMENT_ACCEPT(text_element_subscript) |
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361 TEXT_ELEMENT_ACCEPT(text_element_superscript) |
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362 TEXT_ELEMENT_ACCEPT(text_element_combined) |
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363 TEXT_ELEMENT_ACCEPT(text_element_fontstyle) |
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364 TEXT_ELEMENT_ACCEPT(text_element_fontname) |
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365 TEXT_ELEMENT_ACCEPT(text_element_fontsize) |
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366 TEXT_ELEMENT_ACCEPT(text_element_color) |
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367 |
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368 class OCTINTERP_API text_parser |
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369 { |
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370 public: |
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371 |
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372 OCTAVE_DEFAULT_CONSTRUCT_COPY_MOVE (text_parser) |
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373 |
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374 virtual ~text_parser () = default; |
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375 |
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376 virtual text_element * parse (const std::string& s) = 0; |
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377 |
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378 public: |
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379 static text_element * parse (const std::string& s, |
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380 const caseless_str& interpreter); |
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381 }; |
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382 |
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383 class OCTINTERP_API text_parser_none : public text_parser |
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384 { |
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385 public: |
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386 |
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387 OCTAVE_DEFAULT_CONSTRUCT_COPY_MOVE_DELETE (text_parser_none) |
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388 |
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389 // FIXME: is it possible to use reference counting to manage the |
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390 // memory for the object returned by the text parser? That would be |
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391 // preferable to having to know when and where to delete the object it |
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392 // creates... |
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393 |
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394 text_element * parse (const std::string& s) |
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395 { |
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396 return new text_element_string (s); |
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397 } |
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398 }; |
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399 |
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400 class OCTINTERP_API text_parser_tex : public text_parser |
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401 { |
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402 public: |
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403 |
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404 text_parser_tex () |
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405 : text_parser (), m_scanner (nullptr), m_buffer_state (nullptr), |
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406 m_result (nullptr) |
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407 { } |
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408 |
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409 OCTAVE_DISABLE_COPY_MOVE (text_parser_tex) |
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410 |
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411 ~text_parser_tex () |
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412 { destroy_lexer (); } |
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413 |
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414 text_element * parse (const std::string& s); |
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415 |
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416 void * get_scanner () { return m_scanner; } |
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417 |
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418 void set_parse_result (text_element *e) { m_result = e; } |
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419 |
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420 text_element * get_parse_result () { return m_result; } |
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421 |
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422 private: |
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423 bool init_lexer (const std::string& s); |
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424 |
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425 void destroy_lexer (); |
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426 |
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427 //-------- |
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428 |
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429 void *m_scanner; |
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430 |
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431 void *m_buffer_state; |
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432 |
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433 text_element *m_result; |
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434 }; |
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435 |
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436 inline text_element * |
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437 text_parser::parse (const std::string& s, const caseless_str& interpreter) |
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438 { |
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439 std::unique_ptr<text_parser> parser; |
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440 |
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441 if (interpreter.compare ("tex")) |
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442 parser.reset (new text_parser_tex ()); |
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443 else |
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444 parser.reset (new text_parser_none ()); |
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445 |
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446 return parser->parse (s); |
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447 } |
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448 |
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449 OCTAVE_END_NAMESPACE(octave) |
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450 |
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451 #endif |