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Merge branch 'MDL-55197' of https://github.com/timhunt/moodle

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This commit is contained in:
Jun Pataleta 2019-05-23 11:58:14 +08:00
commit 9e7100cfd1
2 changed files with 65 additions and 36 deletions
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96
filter/multilang/filter.php
View File

@ -38,6 +38,14 @@ defined('MOODLE_INTERNAL') || die();
// Following new syntax is not compatible with old one:
// <span lang="XX" class="multilang">one lang</span><span lang="YY" class="multilang">another language</span>
/**
* Implementation of the Moodle filter API for the Multi-lang filter.
*
* @copyright Gaetan Frenoy <gaetan@frenoy.net>
* @copyright 2004 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class filter_multilang extends moodle_text_filter {
function filter($text, array $options = array()) {
global $CFG;
@ -59,7 +67,7 @@ class filter_multilang extends moodle_text_filter {
$search = '/(<(?:lang|span) lang="[a-zA-Z0-9_-]*".*?>.*?<\/(?:lang|span)>)(\s*<(?:lang|span) lang="[a-zA-Z0-9_-]*".*?>.*?<\/(?:lang|span)>)+/is';
}
$result = preg_replace_callback($search, 'filter_multilang_impl', $text);
$result = preg_replace_callback($search, [$this, 'process_match'], $text);
if (is_null($result)) {
return $text; //error during regex processing (too many nested spans?)
@ -67,44 +75,60 @@ class filter_multilang extends moodle_text_filter {
return $result;
}
}
}
function filter_multilang_impl($langblock) {
global $CFG;
/**
* This is the callback used by the preg_replace_callback call above.
*
* @param array $langblock one of the matches from the regex match.
* @return string the replacement string (one of the possible translations).
*/
protected function process_match(array $langblock): string {
$searchtosplit = '/<(?:lang|span)[^>]+lang="([a-zA-Z0-9_-]+)"[^>]*>(.*?)<\/(?:lang|span)>/is';
$mylang = current_language();
static $parentcache;
if (!isset($parentcache)) {
$parentcache = array();
}
if (!array_key_exists($mylang, $parentcache)) {
$parentlang = get_parent_language($mylang);
$parentcache[$mylang] = $parentlang;
} else {
$parentlang = $parentcache[$mylang];
if (!preg_match_all($searchtosplit, $langblock[0], $rawlanglist)) {
// Skip malformed blocks.
return $langblock[0];
}
$langlist = array();
foreach ($rawlanglist[1] as $index => $lang) {
$lang = str_replace('-', '_', strtolower($lang)); // Normalize languages.
$langlist[$lang] = $rawlanglist[2][$index];
}
// Follow the stream of parent languages.
$lang = current_language();
do {
if (isset($langlist[$lang])) {
return $langlist[$lang];
}
} while ($lang = $this->get_parent_lang($lang));
// If we don't find a match, default to the first provided translation.
return array_shift($langlist);
}
$searchtosplit = '/<(?:lang|span)[^>]+lang="([a-zA-Z0-9_-]+)"[^>]*>(.*?)<\/(?:lang|span)>/is';
if (!preg_match_all($searchtosplit, $langblock[0], $rawlanglist)) {
//skip malformed blocks
return $langblock[0];
}
$langlist = array();
foreach ($rawlanglist[1] as $index=>$lang) {
$lang = str_replace('-','_',strtolower($lang)); // normalize languages
$langlist[$lang] = $rawlanglist[2][$index];
}
if (array_key_exists($mylang, $langlist)) {
return $langlist[$mylang];
} else if (array_key_exists($parentlang, $langlist)) {
return $langlist[$parentlang];
} else {
$first = array_shift($langlist);
return $first;
/**
* Puts some caching around get_parent_language().
*
* Also handle parent == 'en' in a way that works better for us.
*
* @param string $lang a Moodle language code, e.g. 'fr'.
* @return string the parent language.
*/
protected function get_parent_lang(string $lang): string {
static $parentcache;
if (!isset($parentcache)) {
$parentcache = ['en' => ''];
}
if (!isset($parentcache[$lang])) {
$parentcache[$lang] = get_parent_language($lang);
// The standard get_parent_language method returns '' for parent == 'en'.
// That is less helpful for us, so change it back.
if ($parentcache[$lang] === '') {
$parentcache[$lang] = 'en';
}
}
return $parentcache[$lang];
}
}

5
filter/multilang/tests/filter_test.php
View File

@ -116,6 +116,11 @@ class filter_multilang_filter_testcase extends advanced_testcase {
<span lang="fr_ca" class="multilang">Québécois</span>',
'fr', ['fr_ca' => 'fr'],
],
'Fallback to parent when child not present when parent is en' => [
'English',
'<span lang="de" class="multilang">Deutsch</span><span lang="en" class="multilang">English</span>',
'en_us',
],
];
}