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1 <?php
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2
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3 /**
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4 +-----------------------------------------------------------------------+
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5 | This file is part of the Roundcube Webmail client |
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6 | |
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7 | Copyright (C) 2011-2013, Kolab Systems AG |
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8 | Copyright (C) 20011-2013, The Roundcube Dev Team |
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9 | |
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10 | Licensed under the GNU General Public License version 3 or |
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11 | any later version with exceptions for skins & plugins. |
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12 | See the README file for a full license statement. |
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13 | |
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14 | PURPOSE: |
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15 | Spellchecking backend implementation to work with Enchant |
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16 +-----------------------------------------------------------------------+
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17 | Author: Aleksander Machniak <machniak@kolabsys.com> |
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18 +-----------------------------------------------------------------------+
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19 */
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20
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21 /**
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22 * Spellchecking backend implementation to work with Pspell
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23 *
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24 * @package Framework
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25 * @subpackage Utils
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26 */
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27 class rcube_spellcheck_enchant extends rcube_spellcheck_engine
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28 {
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29 private $enchant_broker;
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30 private $enchant_dictionary;
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31 private $matches = array();
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32
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33 /**
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34 * Return a list of languages supported by this backend
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35 *
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36 * @see rcube_spellcheck_engine::languages()
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37 */
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38 function languages()
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39 {
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40 $this->init();
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41
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42 $langs = array();
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43 if ($dicts = enchant_broker_list_dicts($this->enchant_broker)) {
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44 foreach ($dicts as $dict) {
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45 $langs[] = preg_replace('/-.*$/', '', $dict['lang_tag']);
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46 }
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47 }
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48
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49 return array_unique($langs);
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50 }
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51
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52 /**
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53 * Initializes Enchant dictionary
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54 */
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55 private function init()
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56 {
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57 if (!$this->enchant_broker) {
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58 if (!extension_loaded('enchant')) {
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59 $this->error = "Enchant extension not available";
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60 return;
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61 }
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62
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63 $this->enchant_broker = enchant_broker_init();
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64 }
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65
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66 if (!enchant_broker_dict_exists($this->enchant_broker, $this->lang)) {
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67 $this->error = "Unable to load dictionary for selected language using Enchant";
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68 return;
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69 }
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70
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71 $this->enchant_dictionary = enchant_broker_request_dict($this->enchant_broker, $this->lang);
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72 }
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73
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74 /**
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75 * Set content and check spelling
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76 *
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77 * @see rcube_spellcheck_engine::check()
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78 */
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79 function check($text)
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80 {
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81 $this->init();
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82
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83 if (!$this->enchant_dictionary) {
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84 return array();
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85 }
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86
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87 // tokenize
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88 $text = preg_split($this->separator, $text, NULL, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_OFFSET_CAPTURE);
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89
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90 $diff = 0;
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91 $matches = array();
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92
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93 foreach ($text as $w) {
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94 $word = trim($w[0]);
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95 $pos = $w[1] - $diff;
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96 $len = mb_strlen($word);
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97
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98 // skip exceptions
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99 if ($this->dictionary->is_exception($word)) {
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100 }
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101 else if (!enchant_dict_check($this->enchant_dictionary, $word)) {
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102 $suggestions = enchant_dict_suggest($this->enchant_dictionary, $word);
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103
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104 if (count($suggestions) > self::MAX_SUGGESTIONS) {
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105 $suggestions = array_slice($suggestions, 0, self::MAX_SUGGESTIONS);
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106 }
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107
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108 $matches[] = array($word, $pos, $len, null, $suggestions);
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109 }
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110
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111 $diff += (strlen($word) - $len);
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112 }
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113
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114 $this->matches = $matches;
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115 return $matches;
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116 }
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117
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118 /**
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119 * Returns suggestions for the specified word
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120 *
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121 * @see rcube_spellcheck_engine::get_words()
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122 */
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123 function get_suggestions($word)
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124 {
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125 $this->init();
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126
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127 if (!$this->enchant_dictionary) {
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128 return array();
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129 }
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130
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131 $suggestions = enchant_dict_suggest($this->enchant_dictionary, $word);
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132
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133 if (count($suggestions) > self::MAX_SUGGESTIONS)
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134 $suggestions = array_slice($suggestions, 0, self::MAX_SUGGESTIONS);
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135
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136 return is_array($suggestions) ? $suggestions : array();
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137 }
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138
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139 /**
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140 * Returns misspelled words
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141 *
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142 * @see rcube_spellcheck_engine::get_suggestions()
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143 */
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144 function get_words($text = null)
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145 {
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146 $result = array();
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147
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148 if ($text) {
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149 // init spellchecker
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150 $this->init();
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151
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152 if (!$this->enchant_dictionary) {
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153 return array();
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154 }
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155
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156 // With Enchant we don't need to get suggestions to return misspelled words
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157 $text = preg_split($this->separator, $text, NULL, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_OFFSET_CAPTURE);
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158
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159 foreach ($text as $w) {
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160 $word = trim($w[0]);
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161
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162 // skip exceptions
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163 if ($this->dictionary->is_exception($word)) {
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164 continue;
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165 }
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166
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167 if (!enchant_dict_check($this->enchant_dictionary, $word)) {
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168 $result[] = $word;
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169 }
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170 }
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171
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172 return $result;
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173 }
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174
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175 foreach ($this->matches as $m) {
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176 $result[] = $m[0];
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177 }
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178
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179 return $result;
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180 }
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181 }
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