Previously, when using `switch_to_locale()` all current loaded text domains were unloaded and added to the `$l10n_unloaded` global. This prevented the just-in-time loading for text domains after a switch. The just-in-time loading was also only possible if the translations were stored in `WP_LANG_DIR`. Both issues have been fixed.
* Adds `WP_Textdomain_Registry` to keep track of the language directory paths for all plugins and themes.
* Updates all `load_*_textdomain()` functions to store the path in `WP_Textdomain_Registry`.
* Adds `$locale` parameter to `load_textdomain()` to specify the locale the translation file is for.
* Adds `$reloadable` parameter to `unload_textdomain()` to define whether a text domain can be loaded just-in-time again. This is used by `WP_Locale_Switcher::load_translations()`.
* Extends `_load_textdomain_just_in_time()` to also support text domains of plugins and themes with custom language directories.
* Fixes the incorrect `test_plugin_translation_after_switching_locale_twice()` test which should have caught this issue earlier.
* Adds a new test plugin and theme to test the loading of translations with a custom language directory.
* Deprecates the now unused and private `_get_path_to_translation()` and `_get_path_to_translation_from_lang_dir()` functions.
Previously added in [49236] and reverted in [49236] to investigate concerns which are now addressed here.
Props yoavf, swissspidy, dd32, ocean90.
See #26511.
Fixes#39210.
Built from https://develop.svn.wordpress.org/trunk@53874
git-svn-id: http://core.svn.wordpress.org/trunk@53433 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Previously, when using `switch_to_locale()` all current loaded text domains were unloaded and added to the `$l10n_unloaded` global. This prevented the just-in-time loading for text domains after a switch. The just-in-time loading was also only possible if the translations were stored in `WP_LANG_DIR`. Both issues have been fixed.
* Adds `WP_Textdomain_Registry` to keep track of the language directory paths for all plugins and themes.
* Updates all `load_*_textdomain()` functions to store the path in `WP_Textdomain_Registry`.
* Adds `$reloadable` parameter to `unload_textdomain()` to define whether a text domain can be loaded just-in-time again. This is used by `WP_Locale_Switcher::load_translations()`.
* Extends `_load_textdomain_just_in_time()` to also support text domains of plugins and themes with custom language directories.
* Fixes the incorrect `test_plugin_translation_after_switching_locale_twice()` test which should have catch this issue earlier.
* Adds a new test plugin/theme to test the loading of translations with a custom language directory.
* Deprecates the now unused and private `_get_path_to_translation()` and `_get_path_to_translation_from_lang_dir()` functions.
Props yoavf, swissspidy, dd32, ocean90.
See #26511.
Fixes#39210.
Built from https://develop.svn.wordpress.org/trunk@49236
git-svn-id: http://core.svn.wordpress.org/trunk@48998 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Introduces new `determine_locale()` function for deciding the proper locale to use for a response. Default value is `get_user_locale()` in the admin, and `get_locale()` on the frontend. Because REST API requests are considered frontend requests, `?_locale=user` can be used to render the response in the user's locale.
Also updates `wp-login.php?wp_lang` implementation to benefit from this abstraction.
Merges [43776] from the 5.0 branch to trunk.
Props flixos90, mnelson4, swissspidy, TimothyBlynJacobs.
Fixes#44758.
Built from https://develop.svn.wordpress.org/trunk@44134
git-svn-id: http://core.svn.wordpress.org/trunk@43964 1a063a9b-81f0-0310-95a4-ce76da25c4cd
"Install" is not a noun, and while it might be acceptable to use the verb as a noun, it is not correct. Using the correct
noun, "installation", increases clarity, especially for non-native English speakers.
This change fixes the usage in user-facing text and in developer documentation.
Fixes#41620
Built from https://develop.svn.wordpress.org/trunk@41289
git-svn-id: http://core.svn.wordpress.org/trunk@41129 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Prior to about 2013, many class methods lacked even access modifiers which made the `@access` notations that much more useful. Now that we've gotten to a point where the codebase is more mature from a maintenance perspective and we can finally remove these notations. Notable exceptions to this change include standalone functions notated as private as well as some classes still considered to represent "private" APIs.
See #41452.
Built from https://develop.svn.wordpress.org/trunk@41162
git-svn-id: http://core.svn.wordpress.org/trunk@41002 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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
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.
Built from https://develop.svn.wordpress.org/trunk@38961
git-svn-id: http://core.svn.wordpress.org/trunk@38904 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Pascal Birchler
Dominik Schilling
Sergey Biryukov
Jeremy Felt
John Blackbourn
Drew Jaynes