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pspell.php
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pspell.php
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<?php
/**
+-----------------------------------------------------------------------+
| This file is part of the Roundcube Webmail client |
| |
| Copyright (C) The Roundcube Dev Team |
| |
| Licensed under the GNU General Public License version 3 or |
| any later version with exceptions for skins & plugins. |
| See the README file for a full license statement. |
| |
| PURPOSE: |
| Spellchecking backend implementation to work with Pspell |
+-----------------------------------------------------------------------+
| Author: Aleksander Machniak <machniak@kolabsys.com> |
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
*/
/**
* Spellchecking backend implementation to work with Pspell
*
* @package Framework
* @subpackage Utils
*/
class rcube_spellchecker_pspell extends rcube_spellchecker_engine
{
private $plink;
private $matches = [];
/**
* Return a list of languages supported by this backend
*
* @see rcube_spellchecker_engine::languages()
*/
function languages()
{
$defaults = ['en'];
$langs = [];
// get aspell dictionaries
exec('aspell dump dicts', $dicts);
if (!empty($dicts)) {
$seen = [];
foreach ($dicts as $lang) {
$lang = preg_replace('/-.*$/', '', $lang);
$langc = strlen($lang) == 2 ? $lang.'_'.strtoupper($lang) : $lang;
if (empty($seen[$langc])) {
$langs[] = $lang;
$seen[$langc] = true;
}
}
$langs = array_unique($langs);
}
else {
$langs = $defaults;
}
return $langs;
}
/**
* Initializes PSpell dictionary
*/
private function init()
{
if (!$this->plink) {
if (!extension_loaded('pspell')) {
$this->error = "Pspell extension not available";
return;
}
$this->plink = pspell_new($this->lang, null, null, RCUBE_CHARSET, PSPELL_FAST);
}
if (!$this->plink) {
$this->error = "Unable to load Pspell engine for selected language";
}
}
/**
* Set content and check spelling
*
* @see rcube_spellchecker_engine::check()
*/
function check($text)
{
$this->init();
if (!$this->plink) {
return [];
}
// tokenize
$text = preg_split($this->separator, $text, NULL, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_OFFSET_CAPTURE);
$diff = 0;
$matches = [];
foreach ($text as $w) {
$word = trim($w[0]);
$pos = $w[1] - $diff;
$len = mb_strlen($word);
if ($this->dictionary->is_exception($word)) {
// skip exceptions
}
else if (!pspell_check($this->plink, $word)) {
$suggestions = pspell_suggest($this->plink, $word);
if (count($suggestions) > self::MAX_SUGGESTIONS) {
$suggestions = array_slice($suggestions, 0, self::MAX_SUGGESTIONS);
}
$matches[] = [$word, $pos, $len, null, $suggestions];
}
$diff += (strlen($word) - $len);
}
return $this->matches = $matches;
}
/**
* Returns suggestions for the specified word
*
* @see rcube_spellchecker_engine::get_words()
*/
function get_suggestions($word)
{
$this->init();
if (!$this->plink) {
return [];
}
$suggestions = pspell_suggest($this->plink, $word);
if (count($suggestions) > self::MAX_SUGGESTIONS) {
$suggestions = array_slice($suggestions, 0, self::MAX_SUGGESTIONS);
}
return $suggestions ?: [];
}
/**
* Returns misspelled words
*
* @see rcube_spellchecker_engine::get_suggestions()
*/
function get_words($text = null)
{
$result = [];
if ($text) {
// init spellchecker
$this->init();
if (!$this->plink) {
return [];
}
// With PSpell we don't need to get suggestions to return misspelled words
$text = preg_split($this->separator, $text, NULL, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_OFFSET_CAPTURE);
foreach ($text as $w) {
$word = trim($w[0]);
// skip exceptions
if ($this->dictionary->is_exception($word)) {
continue;
}
if (!pspell_check($this->plink, $word)) {
$result[] = $word;
}
}
return $result;
}
foreach ($this->matches as $m) {
$result[] = $m[0];
}
return $result;
}
}

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