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1 /*******************************************************************************
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2
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3 @file UBreakIterator.d
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4
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5 Copyright (c) 2004 Kris Bell
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6
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7 This software is provided 'as-is', without any express or implied
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8 warranty. In no event will the authors be held liable for damages
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9 of any kind arising from the use of this software.
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10
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11 Permission is hereby granted to anyone to use this software for any
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12 purpose, including commercial applications, and to alter it and/or
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13 redistribute it freely, subject to the following restrictions:
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14
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15 1. The origin of this software must not be misrepresented; you must
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16 not claim that you wrote the original software. If you use this
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17 software in a product, an acknowledgment within documentation of
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18 said product would be appreciated but is not required.
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19
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20 2. Altered source versions must be plainly marked as such, and must
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21 not be misrepresented as being the original software.
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22
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23 3. This notice may not be removed or altered from any distribution
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24 of the source.
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25
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26 4. Derivative works are permitted, but they must carry this notice
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27 in full and credit the original source.
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28
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29
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30 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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31
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32
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33 @version Initial version, November 2004
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34 @author Kris
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35
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36 Note that this package and documentation is built around the ICU
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37 project (http://oss.software.ibm.com/icu/). Below is the license
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38 statement as specified by that software:
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39
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40
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41 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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42
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43
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44 ICU License - ICU 1.8.1 and later
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45
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46 COPYRIGHT AND PERMISSION NOTICE
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47
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48 Copyright (c) 1995-2003 International Business Machines Corporation and
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49 others.
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50
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51 All rights reserved.
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52
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53 Permission is hereby granted, free of charge, to any person obtaining a
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54 copy of this software and associated documentation files (the
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55 "Software"), to deal in the Software without restriction, including
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56 without limitation the rights to use, copy, modify, merge, publish,
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57 distribute, and/or sell copies of the Software, and to permit persons
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58 to whom the Software is furnished to do so, provided that the above
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59 copyright notice(s) and this permission notice appear in all copies of
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60 the Software and that both the above copyright notice(s) and this
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61 permission notice appear in supporting documentation.
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62
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63 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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64 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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65 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
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66 OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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67 HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
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68 INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
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69 FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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70 NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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71 WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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72
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73 Except as contained in this notice, the name of a copyright holder
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74 shall not be used in advertising or otherwise to promote the sale, use
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75 or other dealings in this Software without prior written authorization
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76 of the copyright holder.
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77
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78 ----------------------------------------------------------------------
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79
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80 All trademarks and registered trademarks mentioned herein are the
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81 property of their respective owners.
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82
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83 *******************************************************************************/
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84
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85 module dwtx.dwtxhelper.mangoicu.UBreakIterator;
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86
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87 private import dwtx.dwtxhelper.mangoicu.ICU;
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88
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89 public import dwtx.dwtxhelper.mangoicu.ULocale,
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90 dwtx.dwtxhelper.mangoicu.UText,
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91 dwtx.dwtxhelper.mangoicu.UString;
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92
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93
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94
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95 // /*******************************************************************************
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96 //
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97 // *******************************************************************************/
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98 //
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99 // class UCharacterIterator : UBreakIterator
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100 // {
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101 // /***********************************************************************
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102 //
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103 // ***********************************************************************/
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104 //
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105 // this (inout ULocale locale, UStringView text = null)
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106 // {
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107 // super (Type.Character, locale, text);
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108 // }
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109 // }
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110 //
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111 //
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112 // /*******************************************************************************
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113 //
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114 // *******************************************************************************/
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115 //
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116 // class UWordIterator : UBreakIterator
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117 // {
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118 // public enum Break
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119 // {
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120 // None = 0,
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121 // NoneLimit = 100,
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122 // Number = 100,
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123 // NumberLimit = 200,
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124 // Letter = 200,
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125 // LetterLimit = 300,
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126 // Kana = 300,
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127 // KanaLimit = 400,
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128 // Ideo = 400,
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129 // IdeoLimit = 500
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130 // }
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131 //
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132 // /***********************************************************************
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133 //
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134 // ***********************************************************************/
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135 //
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136 // this (inout ULocale locale, UStringView text = null)
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137 // {
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138 // super (Type.Word, locale, text);
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139 // }
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140 //
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141 // /***********************************************************************
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142 //
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143 // Return the status from the break rule that determined
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144 // the most recently returned break position.
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145 //
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146 // ***********************************************************************/
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147 //
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148 // void getStatus (inout Break b)
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149 // {
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150 // b = cast(Break) super.getStatus();
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151 // }
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152 // }
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153 //
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154 //
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155 // /*******************************************************************************
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156 //
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157 // *******************************************************************************/
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158 //
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159 // class ULineIterator : UBreakIterator
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160 // {
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161 // public enum Break
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162 // {
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163 // Soft = 0,
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164 // SoftLimit = 100,
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165 // Hard = 100,
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166 // HardLimit = 200
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167 // }
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168 //
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169 // /***********************************************************************
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170 //
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171 // ***********************************************************************/
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172 //
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173 // this (inout ULocale locale, UStringView text = null)
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174 // {
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175 // super (Type.Line, locale, text);
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176 // }
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177 //
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178 // /***********************************************************************
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179 //
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180 // Return the status from the break rule that determined
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181 // the most recently returned break position.
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182 //
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183 // ***********************************************************************/
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184 //
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185 // void getStatus (inout Break b)
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186 // {
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187 // b = cast(Break) super.getStatus();
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188 // }
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189 // }
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190 //
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191 //
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192 // /*******************************************************************************
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193 //
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194 // *******************************************************************************/
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195 //
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196 // class USentenceIterator : UBreakIterator
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197 // {
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198 // public enum Break
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199 // {
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200 // Term = 0,
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201 // TermLimit = 100,
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202 // Sep = 100,
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203 // Limit = 200
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204 // }
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205 //
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206 // /***********************************************************************
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207 //
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208 // ***********************************************************************/
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209 //
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210 // this (inout ULocale locale, UStringView text = null)
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211 // {
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212 // super (Type.Sentence, locale, text);
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213 // }
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214 //
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215 // /***********************************************************************
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216 //
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217 // Return the status from the break rule that determined
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218 // the most recently returned break position.
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219 //
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220 // ***********************************************************************/
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221 //
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222 // void getStatus (inout Break b)
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223 // {
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224 // b = cast(Break) super.getStatus();
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225 // }
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226 // }
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227 //
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228 //
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229 // /*******************************************************************************
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230 //
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231 // *******************************************************************************/
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232 //
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233 // class UTitleIterator : UBreakIterator
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234 // {
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235 // /***********************************************************************
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236 //
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237 // ***********************************************************************/
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238 //
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239 // this (inout ULocale locale, UStringView text = null)
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240 // {
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241 // super (Type.Title, locale, text);
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242 // }
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243 // }
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244 //
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245 //
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246 // /*******************************************************************************
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247 //
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248 // *******************************************************************************/
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249 //
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250 // class URuleIterator : UBreakIterator
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251 // {
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252 // /***********************************************************************
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253 //
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254 // Open a new UBreakIterator for locating text boundaries
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255 // using specified breaking rules
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256 //
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257 // ***********************************************************************/
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258 //
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259 // this (UStringView rules, UStringView text = null)
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260 // {
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261 // UErrorCode e;
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262 //
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263 // handle = ubrk_openRules (rules.get.ptr, rules.length, text.get.ptr, text.length, null, e);
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264 // testError (e, "failed to open rule iterator");
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265 // }
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266 // }
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267
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268
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269 /*******************************************************************************
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270
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271 BreakIterator defines methods for finding the location of boundaries
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272 in text. Pointer to a UBreakIterator maintain a current position and
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273 scan over text returning the index of characters where boundaries occur.
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274
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275 Line boundary analysis determines where a text string can be broken
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276 when line-wrapping. The mechanism correctly handles punctuation and
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277 hyphenated words.
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278
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279 Sentence boundary analysis allows selection with correct interpretation
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280 of periods within numbers and abbreviations, and trailing punctuation
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281 marks such as quotation marks and parentheses.
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282
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283 Word boundary analysis is used by search and replace functions, as well
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284 as within text editing applications that allow the user to select words
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285 with a double click. Word selection provides correct interpretation of
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286 punctuation marks within and following words. Characters that are not
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287 part of a word, such as symbols or punctuation marks, have word-breaks
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288 on both sides.
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289
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290 Character boundary analysis allows users to interact with characters
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291 as they expect to, for example, when moving the cursor through a text
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292 string. Character boundary analysis provides correct navigation of
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293 through character strings, regardless of how the character is stored.
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294 For example, an accented character might be stored as a base character
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295 and a diacritical mark. What users consider to be a character can differ
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296 between languages.
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297
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298 Title boundary analysis locates all positions, typically starts of
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299 words, that should be set to Title Case when title casing the text.
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300
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301 See <A HREF="http://oss.software.ibm.com/icu/apiref/ubrk_8h.html">
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302 this page</A> for full details.
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303
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304 *******************************************************************************/
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305
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306 struct UBreakIterator
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307 {
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308 typedef void _UBreakIterator;
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309 alias _UBreakIterator* Handle;
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310 Handle handle;
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311 UText ut;
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312
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313 // this is returned by next(), previous() etc ...
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314 const uint Done = uint.max;
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315
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316 /***********************************************************************
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317
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318 internal types passed to C API
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319
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320 ***********************************************************************/
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321
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322 private enum Type
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323 {
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324 Character,
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325 Word,
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326 Line,
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327 Sentence,
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328 Title
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329 }
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330
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331
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332 public enum WordBreak
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333 {
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334 None = 0,
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335 NoneLimit = 100,
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336 Number = 100,
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337 NumberLimit = 200,
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338 Letter = 200,
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339 LetterLimit = 300,
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340 Kana = 300,
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341 KanaLimit = 400,
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342 Ideo = 400,
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343 IdeoLimit = 500
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344 }
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345 public enum LineBreak
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346 {
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347 Soft = 0,
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348 SoftLimit = 100,
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349 Hard = 100,
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350 HardLimit = 200
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351 }
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352 public enum SentenceBreak
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353 {
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354 Term = 0,
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355 TermLimit = 100,
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356 Sep = 100,
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357 Limit = 200
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358 }
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359
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360
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361 /***********************************************************************
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362
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363 Open a new UBreakIterator for locating text boundaries for
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364 a specified locale. A UBreakIterator may be used for detecting
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365 character, line, word, and sentence breaks in text.
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366
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367 ***********************************************************************/
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368
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369 static UBreakIterator openWordIterator( ULocale locale, char[] str ){
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370 UBreakIterator res;
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371 res.ut.openUTF8(str);
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372 auto e = ICU.UErrorCode.OK;
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373 res.handle = ubrk_open( Type.Word, locale.name.ptr, null, 0, e);
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374 ICU.testError (e, "failed to open word iterator");
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375 ubrk_setUText( res.handle, & res.ut, e);
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376 ICU.testError (e, "failed to set text in iterator");
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377 return res;
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378 }
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379
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380 static UBreakIterator openLineIterator( ULocale locale, char[] str ){
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381 UBreakIterator res;
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382 res.ut.openUTF8(str);
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383 auto e = ICU.UErrorCode.OK;
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384 res.handle = ubrk_open( Type.Line, locale.name.ptr, null, 0, e);
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385 ICU.testError (e, "failed to open line iterator");
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386 ubrk_setUText( res.handle, & res.ut, e);
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387 ICU.testError (e, "failed to set text in iterator");
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388 return res;
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389 }
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390
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391 /***********************************************************************
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392
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393 Close a UBreakIterator
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394
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395 ***********************************************************************/
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396
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397 void close ()
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398 {
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399 ut.close();
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400 ubrk_close (handle);
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401 }
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402
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403 /***********************************************************************
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404
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405 Sets an existing iterator to point to a new piece of text
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406
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407 ***********************************************************************/
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408
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409 void setText (UStringView text)
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410 {
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411 ICU.UErrorCode e;
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412 ubrk_setText (handle, text.get.ptr, text.length, e);
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413 ICU.testError (e, "failed to set iterator text");
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414 }
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415
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416 void setText (char[] text)
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417 {
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418 auto e = ICU.UErrorCode.OK;
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419 ut.openUTF8(text);
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420 ubrk_setUText( handle, & ut, e);
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421 ICU.testError (e, "failed to set text in iterator");
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422 }
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423
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424 /***********************************************************************
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425
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426 Determine the most recently-returned text boundary
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427
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428 ***********************************************************************/
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429
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430 uint current ()
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431 {
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432 return ubrk_current (handle);
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433 }
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434
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435 /***********************************************************************
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436
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437 Determine the text boundary following the current text
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438 boundary, or UBRK_DONE if all text boundaries have been
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439 returned.
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440
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441 If offset is specified, determines the text boundary
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442 following the current text boundary: The value returned
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443 is always greater than offset, or Done
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444
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445 ***********************************************************************/
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446
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447 uint next (uint offset = uint.max)
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448 {
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449 if (offset == uint.max)
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450 return ubrk_next (handle);
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451 return ubrk_following (handle, offset);
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452 }
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453
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454 /***********************************************************************
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455
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456 Determine the text boundary preceding the current text
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457 boundary, or Done if all text boundaries have been returned.
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458
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459 If offset is specified, determines the text boundary preceding
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460 the specified offset. The value returned is always smaller than
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461 offset, or Done.
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462
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463 ***********************************************************************/
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464
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465 uint previous (uint offset = uint.max)
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466 {
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467 if (offset == uint.max)
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468 return ubrk_previous (handle);
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469 return ubrk_preceding (handle, offset);
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470 }
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|
|
471
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|
472 /***********************************************************************
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473
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474 Determine the index of the first character in the text
|
|
|
475 being scanned. This is not always the same as index 0
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|
|
476 of the text.
|
|
|
477
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|
478 ***********************************************************************/
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479
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480 uint first ()
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481 {
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|
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482 return ubrk_first (handle);
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|
|
483 }
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|
|
484
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|
485 /***********************************************************************
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|
|
486
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|
|
487 Determine the index immediately beyond the last character
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|
|
488 in the text being scanned. This is not the same as the last
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|
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489 character
|
|
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490
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|
|
491 ***********************************************************************/
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|
|
492
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493 uint last ()
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|
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494 {
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|
|
495 return ubrk_last (handle);
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|
|
496 }
|
|
|
497
|
|
|
498 /***********************************************************************
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|
|
499
|
|
|
500 Returns true if the specfied position is a boundary position.
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|
|
501 As a side effect, leaves the iterator pointing to the first
|
|
|
502 boundary position at or after "offset".
|
|
|
503
|
|
|
504 ***********************************************************************/
|
|
|
505
|
|
|
506 bool isBoundary (uint offset)
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|
|
507 {
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|
|
508 return ubrk_isBoundary (handle, offset) != 0;
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|
|
509 }
|
|
|
510
|
|
|
511 /***********************************************************************
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|
|
512
|
|
|
513 Return the status from the break rule that determined
|
|
|
514 the most recently returned break position.
|
|
|
515
|
|
|
516 ***********************************************************************/
|
|
|
517
|
|
|
518 void getStatus (inout uint s)
|
|
|
519 {
|
|
|
520 s = getStatus ();
|
|
|
521 }
|
|
|
522
|
|
|
523 /***********************************************************************
|
|
|
524
|
|
|
525 Return the status from the break rule that determined
|
|
|
526 the most recently returned break position.
|
|
|
527
|
|
|
528 The values appear in the rule source within brackets,
|
|
|
529 {123}, for example. For rules that do not specify a status,
|
|
|
530 a default value of 0 is returned.
|
|
|
531
|
|
|
532 For word break iterators, the possible values are defined
|
|
|
533 in enum UWordBreak
|
|
|
534
|
|
|
535 ***********************************************************************/
|
|
|
536
|
|
|
537 private uint getStatus ()
|
|
|
538 {
|
|
|
539 return ubrk_getRuleStatus (handle);
|
|
|
540 }
|
|
|
541
|
|
|
542
|
|
|
543 /***********************************************************************
|
|
|
544
|
|
|
545 Bind the ICU functions from a shared library. This is
|
|
|
546 complicated by the issues regarding D and DLLs on the
|
|
|
547 Windows platform
|
|
|
548
|
|
|
549 ***********************************************************************/
|
|
|
550
|
|
|
551 private static void* library;
|
|
|
552
|
|
|
553 /***********************************************************************
|
|
|
554
|
|
|
555 ***********************************************************************/
|
|
|
556
|
|
|
557 private static extern (C)
|
|
|
558 {
|
|
|
559 Handle function (uint, char*, wchar*, uint, inout ICU.UErrorCode) ubrk_open;
|
|
|
560 Handle function (wchar*, uint, wchar*, uint, void*, inout ICU.UErrorCode) ubrk_openRules;
|
|
|
561 void function (Handle) ubrk_close;
|
|
|
562 void function (Handle, wchar*, uint, inout ICU.UErrorCode) ubrk_setText;
|
|
|
563 uint function (Handle) ubrk_current;
|
|
|
564 uint function (Handle) ubrk_next;
|
|
|
565 uint function (Handle) ubrk_previous;
|
|
|
566 uint function (Handle) ubrk_first;
|
|
|
567 uint function (Handle) ubrk_last;
|
|
|
568 uint function (Handle, uint) ubrk_preceding;
|
|
|
569 uint function (Handle, uint) ubrk_following;
|
|
|
570 byte function (Handle, uint) ubrk_isBoundary;
|
|
|
571 uint function (Handle) ubrk_getRuleStatus;
|
|
|
572 Handle function (Handle, void *, int *, inout ICU.UErrorCode) ubrk_safeClone;
|
|
|
573 void function (Handle, UText*, inout ICU.UErrorCode) ubrk_setUText;
|
|
|
574 }
|
|
|
575
|
|
|
576 /***********************************************************************
|
|
|
577
|
|
|
578 ***********************************************************************/
|
|
|
579
|
|
|
580 static FunctionLoader.Bind[] targets =
|
|
|
581 [
|
|
|
582 {cast(void**) &ubrk_open, "ubrk_open"},
|
|
|
583 {cast(void**) &ubrk_close, "ubrk_close"},
|
|
|
584 {cast(void**) &ubrk_openRules, "ubrk_openRules"},
|
|
|
585 {cast(void**) &ubrk_setText, "ubrk_setText"},
|
|
|
586 {cast(void**) &ubrk_current, "ubrk_current"},
|
|
|
587 {cast(void**) &ubrk_next, "ubrk_next"},
|
|
|
588 {cast(void**) &ubrk_previous, "ubrk_previous"},
|
|
|
589 {cast(void**) &ubrk_first, "ubrk_first"},
|
|
|
590 {cast(void**) &ubrk_last, "ubrk_last"},
|
|
|
591 {cast(void**) &ubrk_preceding, "ubrk_preceding"},
|
|
|
592 {cast(void**) &ubrk_following, "ubrk_following"},
|
|
|
593 {cast(void**) &ubrk_isBoundary, "ubrk_isBoundary"},
|
|
|
594 {cast(void**) &ubrk_getRuleStatus, "ubrk_getRuleStatus"},
|
|
|
595 {cast(void**) &ubrk_setUText, "ubrk_setUText"},
|
|
|
596 {cast(void**) &ubrk_safeClone, "ubrk_safeClone"},
|
|
|
597 ];
|
|
|
598
|
|
|
599 /**********************************************************************
|
|
|
600
|
|
|
601 **********************************************************************/
|
|
|
602
|
|
|
603 static this ()
|
|
|
604 {
|
|
|
605 library = FunctionLoader.bind (ICU.icuuc, targets);
|
|
|
606 }
|
|
|
607
|
|
|
608 /**********************************************************************
|
|
|
609
|
|
|
610 **********************************************************************/
|
|
|
611
|
|
|
612 static ~this ()
|
|
|
613 {
|
|
|
614 FunctionLoader.unbind (library);
|
|
|
615 }
|
|
|
616 }
|
