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I18N: Introduce a locale-switching function.

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With the introduction of user-specific languages in [38705] it's necessary to be able to switch translations on the fly. For example emails should be sent in the language of the recipient and not the one of the current user.

This introduces a new `WP_Locale_Switcher` class which is used for switching locales and translations. It holds the stack of locales whenever `switch_to_locale( $locale )` is called. With `restore_previous_locale()` you can restore the previous locale. `restore_current_locale()` empties the stack and sets the locale back to the initial value.

`switch_to_locale()` is added to most of core's email functions, either with the value of `get_locale()` (site language) or `get_user_locale()` (user language with fallback to site language).

Props yoavf, tfrommen, swissspidy, pbearne, ocean90.
See #29783.
Fixes #26511.

git-svn-id: https://develop.svn.wordpress.org/trunk@38961 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Dominik Schilling (ocean90)
2016-10-26 15:35:58 +00:00
parent a6a15b1819
commit 9e3f6d338b
15 changed files with 867 additions and 16 deletions
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10
src/wp-includes/load.php
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@@ -841,13 +841,14 @@ function get_current_network_id() {
* @since 3.4.0
* @access private
*
* @global string $text_direction
* @global WP_Locale $wp_locale The WordPress date and time locale object.
* @global string $text_direction
* @global WP_Locale $wp_locale The WordPress date and time locale object.
* @global WP_Locale_Switcher $wp_locale_switcher WordPress locale switcher object.
*
* @staticvar bool $loaded
*/
function wp_load_translations_early() {
global $text_direction, $wp_locale;
global $text_direction, $wp_locale, $wp_locale_switcher;
static $loaded = false;
if ( $loaded )
@@ -864,6 +865,7 @@ function wp_load_translations_early() {
require_once ABSPATH . WPINC . '/pomo/mo.php';
require_once ABSPATH . WPINC . '/l10n.php';
require_once ABSPATH . WPINC . '/class-wp-locale.php';
require_once ABSPATH . WPINC . '/class-wp-locale-switcher.php';
// General libraries
require_once ABSPATH . WPINC . '/plugin.php';
@@ -915,6 +917,8 @@ function wp_load_translations_early() {
}
$wp_locale = new WP_Locale();
$wp_locale_switcher = new WP_Locale_Switcher();
$wp_locale_switcher->init();
}
/**