Directionality support/zh

希伯来语（RTL）界面下的英语（LTR）内容。

对不同书写 方向（从左向右、从右向左）的支持对多语言软件至关重要。 自MediaWiki 1.18 版本以来，这方面的支持已有了巨大改善。

如果您是系统管理员或开发者，希望开发与从右向左等等不同方向的书写体系的界面相兼容的功能或扩展，本页包括了相关的信息和指导。

User-level tips

Some general tips for users, before getting to details for developers:

• Most browsers support changing the direction of a plain-text editing area, such as article search boxes, wiki syntax editing, edit summary, etc.

Depending on browsers and operating systems, this is done by Ctrl+⇧ Shift (Chrome and IE on Windows), Ctrl+⇧ Shift+X (Firefox), Option-Click-Change direction (Mac). This should help you typing in a direction that is different from the site's usual direction.

• When typing a section in a language that has a direction that is different from the site's, add a div tag with appropriate lang, dir and class attributes.

For example, when typing an English section in the Arabic Wikipedia, type <div lang="en" dir="ltr" class="mw-content-ltr"> in the beginning and ‎</div> in the end.

• When typing just a few words inside a paragraph, put them inside a ‎<span> tag with appropriate lang and dir attributes.

(Many wikis have a template for this, such as {{lang}}).

• To separate numbers from an adjacent word with different directionality, use RLM or LRM characters.

Many wikis have templates for this, for example {{כ}} in the Hebrew Wikipedia, {{RLM}} in the Arabic Wikipedia, {{رچ}} in the Persian Wikipedia, etc. When a template is available, it's usually preferred to using the Unicode character itself.

You can report bugs in RTL handling in Phabricator in any MediaWiki-related project using the RTL tag.

资源加载器

Thanks to ResourceLoader including CSSJanus, CSS is automatically flipped to right-to-left when the user language is RTL. This is default since 1.18 (in previous versions it was dependent on the wiki content language). There is relatively little CSS that must depend on the content language.

• Attention: when using ResourceLoader's debug mode, the CSS may be inconsistently rendered compared to the production mode.

As a temporary work-around test RTL interface with debug off. (Issue being tracked as Phabricator:T29025.)

What kind of languages?

主条目： Manual:语言

• $wgLang - user language (and the respective direction)

• $wgContLang - site content language (and respective direction) -> here LTR

• Title->getPageLanguage() - page content language (and respective direction) -> by default the same as site content language

• • There are some default exceptions: see below
  • It can be set in extensions by the hook PageContentLanguage
  • This sets the TOC (and stuff like grammar, although not really relevant mostly) to that language. To do that only, use parserOptions->setTargetLanguage()

• In extensions that should remain compatible with 1.17, you can use wfUILang(), however this breaks compatibility with 1.16 and below.

This returns $wgLang in 1.18 and higher but $wgContLang in 1.17 (by default).

What should follow which kind?

• Special pages follow the user language by default.

• Source code should be English (CSS/JS pages are set to English by default).

• Pages with translation as subpages should follow the language of the translation (e.g. "Page" is wgContLang, "Page/he" is "he"). This is the default for the MediaWiki namespace.

• Input boxes and textareas follow content direction by default.

• When viewing a diff, it follows the user language, but the actual diff text is in the page content language.

Directionality can be confusing, but you can watch mooeypoo's linux.conf.au talk entitled "Wait, ?tahW: The Twisted Road to Right-to-Left Language Support" to get a better understanding of the issues and solutions involved.

What should I add in the source code?

• Anything on special pages that is different from the user language should have a <div dir="..." lang="..."> tag.

  Example: SpecialRecentchanges->setTopText() which adds the "recentchangestext" message in the wiki content language.

• Anything on custom namespaces that contains text different from the default wiki content should also have a div tag.

• When the diff text is not the same as the page content language, use $diff->setTextLanguage( 'code' ); where $diff is a DifferenceEngine object.

lang/dir attributes

You should use HTML:

Xml::rawElement( 'div', array( 'lang' => $wgContLang->getCode(), 'dir' => $wgContLang->getDir() );

but sometimes that is difficult in dynamically generated elements and you can fall back on CSS:

.class { direction: ltr; }

Wiki content

MediaWiki版本：

≥ 1.18

You can use mw-content-ltr and mw-content-rtl classes to make use of edit section links and ul/ol elements based on that direction.

例如

Xml::rawElement( 'div', array(
        'class' => 'mw-content-' . $wgLang->getDir(),
        'lang' => $wgLang->getCode(),
        'dir' => $wgLang->getDir(),
        'Text'
);

This is of course used for the page content of articles.

• On file pages, it is only added around the actual text while the rest of the file page is custom UI (file history, ...).

• On category pages it is added as on regular pages, but the text in the user language is embedded in a div with lang and dir attributes according to the user language.

• On special pages it is not added because these are largely in the user language.

A piece of text on special pages can be in the content language, which should then be embedded in these classes. It is for example used in the CodeReview extension for the code summary and code comments, which can contain ul/ol elements (* and # wikitext) in the wiki content language and in principle not the user language obviously.

Adding UI stuff within these classes should not be done. For example, the category links and FlaggedRevs review form are inside #bodyContent but outside .mw-content-ltr/rtl.

See also IDs and classes.

body classes

The body tag has an ltr or rtl class by default, which follows the user language. You shouldn't use that, because CSS is automatically flipped based on the user language. The body tag also features a new (1.18) sitedir-ltr and sitedir-rtl class which follows $wgContLang->getDir(). If there is need for it, a "userlang-ltr/rtl" and/or "pagelang-ltr/rtl" could be added as well.

float/text-align

You can use $wgLang->alignStart(), $wgContLang->alignStart(), $wgLang->alignEnd(), $wgContLang->alignEnd() which gives the appropriate 'right' or 'left' values.

You can use CSS float or text-align of which the value (left/right) is flipped for RTL interface languages.

示例

Special:AllMessages is a special page, which means it follows the user language direction. However, the actual messages should follow the direction of the selected language.

• Special:Allmessages = English, LTR
• Special:Allmessages/he = Hebrew, RTL

The cells in the table containing the content of the messages, have a lang & dir attribute.

The Translate extension, making use of the PageContentLanguage hook, sets the right language (and consequently direction) for translated pages, see e.g. meta:Wikimedia_maintenance_notice/ar which benefits from the mw-content-rtl class on an LTR wiki.

Local wikis

MediaWiki:Common.css pages and relatives are also flipped. This means that you have to add @noflip where needed.

See T33923: site CSS should not be flipped by default.

问题

• Most major features and extensions have improved support since about 1.19, see translatewiki:Project:Better directionality and i18n development for that.
• Known remaining issues:
  • External link icons are flipped according to user language direction (minor issue)
  • LiquidThreads - Use contlang instead of pagelang, otherwise special page returns userlang
  • WikiLove - kittens aligned left ([[File:Blabla.jpg|left]]) should be aligned right in RTL wikis (minor issue)
  • OmegaWiki: needs general overhaul (Expression and DefinedMeaning pages should follow user direction) + 23035
• Search bugs: https://bugzilla.wikimedia.org/buglist.cgi?quicksearch=rtl

参见

• 手册:界面/ID和类
• 本地化
• translatewiki:Project:Better directionality and i18n development (around 2011) and the much older m:BiDi workgroup
• Manual:Hooks/PageContentLanguage
• Visual editor/Bidirectional text requirements
• Extension:RevisionSlider/Developing a RTL-accessible feature in MediaWiki - what we've learned while creating the RevisionSlider
• Quick Intro: Unicode Bidirectional Algorithm by User:MSchottlender-WMF
• rtl.wtf - articles and examples about how to support right-to-left online