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I18N: Add an additional caching layer for _load_textdomain_just_in_time().

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Previously, if no translation files exist for a text domain, `_load_textdomain_just_in_time()` went through the entire process each time it was called. This results in an increased call to `get_locale()` and its `locale` filter.
This change splits the logic into `_get_path_to_translation()` and `_get_path_to_translation_from_lang_dir()`. The former, which is used by `_load_textdomain_just_in_time()`, caches the result of the latter. It also removes some non-working code from `WP_Locale_Switcher::load_translations()`.

Props jrf, swissspidy, sharkomatic, ocean90.
Fixes #37997.
Built from https://develop.svn.wordpress.org/trunk@39330


git-svn-id: http://core.svn.wordpress.org/trunk@39270 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Dominik Schilling 2016-11-21 16:07:33 +00:00
parent 863505cf81
commit f5b6731777
3 changed files with 62 additions and 16 deletions
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10
wp-includes/class-wp-locale-switcher.php
View File

@ -202,14 +202,7 @@ class WP_Locale_Switcher {
continue;
}
$mofile = $l10n[ $domain ]->get_filename();
unload_textdomain( $domain );
if ( $mofile ) {
load_textdomain( $domain, $mofile );
}
get_translations_for_domain( $domain );
}
}
@ -228,6 +221,9 @@ class WP_Locale_Switcher {
* @param string $locale The locale to change to.
*/
private function change_locale( $locale ) {
// Reset translation availability information.
_get_path_to_translation( null, true );
$this->load_translations( $locale );
$GLOBALS['wp_locale'] = new WP_Locale();

66
wp-includes/l10n.php
View File

@ -827,8 +827,6 @@ function load_child_theme_textdomain( $domain, $path = false ) {
* the translation file from `wp-content/languages`, removing the need
* to call load_plugin_texdomain() or load_theme_texdomain().
*
* Holds a cached list of available .mo files to improve performance.
*
* @since 4.6.0
* @access private
*
@ -843,13 +841,63 @@ function _load_textdomain_just_in_time( $domain ) {
$l10n_unloaded = (array) $l10n_unloaded;
static $cached_mofiles = null;
// Short-circuit if domain is 'default' which is reserved for core.
if ( 'default' === $domain || isset( $l10n_unloaded[ $domain ] ) ) {
return false;
}
$translation_path = _get_path_to_translation( $domain );
if ( false === $translation_path ) {
return false;
}
return load_textdomain( $domain, $translation_path );
}
/**
* Gets the path to a translation file for loading a textdomain just in time.
*
* Caches the retrieved results internally.
*
* @since 4.7.0
* @access private
*
* @see _load_textdomain_just_in_time()
*
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
* @param bool $reset Whether to reset the internal cache. Used by the switch to locale functionality.
* @return string|false The path to the translation file or false if no translation file was found.
*/
function _get_path_to_translation( $domain, $reset = false ) {
static $available_translations = array();
if ( true === $reset ) {
$available_translations = array();
}
if ( ! isset( $available_translations[ $domain ] ) ) {
$available_translations[ $domain ] = _get_path_to_translation_from_lang_dir( $domain );
}
return $available_translations[ $domain ];
}
/**
* Gets the path to a translation file in the languages directory for the current locale.
*
* Holds a cached list of available .mo files to improve performance.
*
* @since 4.7.0
* @access private
*
* @see _get_path_to_translation()
*
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
* @return string|false The path to the translation file or false if no translation file was found.
*/
function _get_path_to_translation_from_lang_dir( $domain ) {
static $cached_mofiles = null;
if ( null === $cached_mofiles ) {
$cached_mofiles = array();
@ -869,12 +917,14 @@ function _load_textdomain_just_in_time( $domain ) {
$locale = is_admin() ? get_user_locale() : get_locale();
$mofile = "{$domain}-{$locale}.mo";
if ( in_array( WP_LANG_DIR . '/plugins/' . $mofile, $cached_mofiles ) ) {
return load_textdomain( $domain, WP_LANG_DIR . '/plugins/' . $mofile );
$path = WP_LANG_DIR . '/plugins/' . $mofile;
if ( in_array( $path, $cached_mofiles ) ) {
return $path;
}
if ( in_array( WP_LANG_DIR . '/themes/' . $mofile, $cached_mofiles ) ) {
return load_textdomain( $domain, WP_LANG_DIR . '/themes/' . $mofile );
$path = WP_LANG_DIR . '/themes/' . $mofile;
if ( in_array( $path, $cached_mofiles ) ) {
return $path;
}
return false;

2
wp-includes/version.php
View File

@ -4,7 +4,7 @@
*
* @global string $wp_version
*/
$wp_version = '4.7-beta4-39329';
$wp_version = '4.7-beta4-39330';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.