mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/WikiEditor
synced 2024-11-14 19:31:55 +00:00
629 lines
24 KiB
JavaScript
629 lines
24 KiB
JavaScript
/**
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* This plugin provides a way to build a wiki-text editing user interface around a textarea.
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*
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* @example To intialize without any modules:
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* $j( 'div#edittoolbar' ).wikiEditor();
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*
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* @example To initialize with one or more modules, or to add modules after it's already been initialized:
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* $j( 'textarea#wpTextbox1' ).wikiEditor( 'addModule', 'toolbar', { ... config ... } );
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*
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*/
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( function( $ ) {
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/**
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* Global static object for wikiEditor that provides generally useful functionality to all modules and contexts.
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*/
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$.wikiEditor = {
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/**
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* For each module that is loaded, static code shared by all instances is loaded into this object organized by
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* module name. The existance of a module in this object only indicates the module is available. To check if a
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* module is in use by a specific context check the context.modules object.
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*/
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'modules': {},
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/**
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* A context can be extended, such as adding iframe support, on a per-wikiEditor instance basis.
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*/
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'extensions': {},
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/**
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* In some cases like with the iframe's HTML file, it's convienent to have a lookup table of all instances of the
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* WikiEditor. Each context contains an instance field which contains a key that corrosponds to a reference to the
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* textarea which the WikiEditor was build around. This way, by passing a simple integer you can provide a way back
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* to a specific context.
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*/
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'instances': [],
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/**
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* For each browser name, an array of conditions that must be met are supplied in [operaton, value]-form where
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* operation is a string containing a JavaScript compatible binary operator and value is either a number to be
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* compared with $.browser.versionNumber or a string to be compared with $.browser.version. If a browser is not
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* specifically mentioned, we just assume things will work.
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*/
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'browsers': {
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// Left-to-right languages
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'ltr': {
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// The toolbar layout is broken in IE6
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'msie': [['>=', 7]],
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// Layout issues in FF < 2
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'firefox': [['>=', 2]],
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// Text selection bugs galore - this may be a different situation with the new iframe-based solution
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'opera': [['>=', 9.6]],
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// jQuery minimums
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'safari': [['>=', 3]],
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'chrome': [['>=', 3]],
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'netscape': [['>=', 9]],
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'blackberry': false,
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'ipod': false,
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'iphone': false
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},
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// Right-to-left languages
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'rtl': {
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// The toolbar layout is broken in IE 7 in RTL mode, and IE6 in any mode
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'msie': [['>=', 8]],
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// Layout issues in FF < 2
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'firefox': [['>=', 2]],
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// Text selection bugs galore - this may be a different situation with the new iframe-based solution
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'opera': [['>=', 9.6]],
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// jQuery minimums
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'safari': [['>=', 3]],
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'chrome': [['>=', 3]],
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'netscape': [['>=', 9]],
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'blackberry': false,
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'ipod': false,
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'iphone': false
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}
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},
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/**
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* Path to images - this is a bit messy, and it would need to change if this code (and images) gets moved into the
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* core - or anywhere for that matter...
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*/
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'imgPath' : wgScriptPath + '/extensions/WikiEditor/modules/images/',
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/**
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* Checks the current browser against the browsers object to determine if the browser has been black-listed or not.
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* Because these rules are often very complex, the object contains configurable operators and can check against
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* either the browser version number or string. This process also involves checking if the current browser is amung
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* those which we have configured as compatible or not. If the browser was not configured as comptible we just go on
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* assuming things will work - the argument here is to prevent the need to update the code when a new browser comes
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* to market. The assumption here is that any new browser will be built on an existing engine or be otherwise so
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* similar to another existing browser that things actually do work as expected. The merrits of this argument, which
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* is essentially to blacklist rather than whitelist are debateable, but at this point we've decided it's the more
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* "open-web" way to go.
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* @param module Module object, defaults to $.wikiEditor
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*/
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'isSupported': function( module ) {
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// Fallback to the wikiEditor browser map if no special map is provided in the module
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var mod = module && 'browsers' in module ? module : $.wikiEditor;
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// Check for and make use of cached value and early opportunities to bail
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if ( typeof mod.supported !== 'undefined' ) {
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// Cache hit
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return mod.supported;
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}
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// Run a browser support test and then cache and return the result
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return mod.supported = $.client.test( mod.browsers );
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},
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/**
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* Checks if a module has a specific requirement
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* @param module Module object
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* @param requirement String identifying requirement
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*/
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'isRequired': function( module, requirement ) {
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if ( typeof module['req'] !== 'undefined' ) {
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for ( req in module['req'] ) {
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if ( module['req'][req] == requirement ) {
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return true;
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}
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}
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}
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return false;
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},
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/**
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* Provides a way to extract messages from objects. Wraps the mediaWiki.msg() function, which
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* may eventually become a wrapper for some kind of core MW functionality.
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*
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* @param object Object to extract messages from
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* @param property String of name of property which contains the message. This should be the base name of the
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* property, which means that in the case of the object { this: 'that', fooMsg: 'bar' }, passing property as 'this'
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* would return the raw text 'that', while passing property as 'foo' would return the internationalized message
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* with the key 'bar'.
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*/
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'autoMsg': function( object, property ) {
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// Accept array of possible properties, of which the first one found will be used
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if ( typeof property == 'object' ) {
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for ( var i in property ) {
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if ( property[i] in object || property[i] + 'Msg' in object ) {
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property = property[i];
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break;
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}
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}
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}
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if ( property in object ) {
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return object[property];
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} else if ( property + 'Msg' in object ) {
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var p = object[property + 'Msg'];
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if ( $.isArray( p ) && p.length >= 2 ) {
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return mediaWiki.msg.apply( mediaWiki.msg, p );
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} else {
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return mediaWiki.msg( p );
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}
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} else {
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return '';
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}
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},
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/**
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* Provides a way to extract a property of an object in a certain language, falling back on the property keyed as
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* 'default'. If such key doesn't exist, the object itself is considered the actual value, which should ideally
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* be the case so that you may use a string or object of any number of strings keyed by language with a default.
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*
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* @param object Object to extract property from
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* @param lang Language code, defaults to wgUserLanguage
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*/
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'autoLang': function( object, lang ) {
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return object[lang || wgUserLanguage] || object['default'] || object;
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},
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/**
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* Provides a way to extract the path of an icon in a certain language, automatically appending a version number for
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* caching purposes and prepending an image path when icon paths are relative.
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*
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* @param icon Icon object from e.g. toolbar config
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* @param path Default icon path, defaults to $.wikiEditor.imgPath
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* @param lang Language code, defaults to wgUserLanguage
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*/
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'autoIcon': function( icon, path, lang ) {
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var src = $.wikiEditor.autoLang( icon, lang );
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path = path || $.wikiEditor.imgPath;
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// Prepend path if src is not absolute
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if ( src.substr( 0, 7 ) != 'http://' && src.substr( 0, 8 ) != 'https://' && src[0] != '/' ) {
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src = path + src;
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}
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return src + '?' + mediaWiki.loader.version( 'jquery.wikiEditor' );
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},
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/**
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* Get the sprite offset for a language if available, icon for a language if available, or the default offset or icon,
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* in that order of preference.
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* @param icon Icon object, see autoIcon()
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* @param offset Offset object
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* @param path Icon path, see autoIcon()
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* @param lang Language code, defaults to wgUserLanguage
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*/
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'autoIconOrOffset': function( icon, offset, path, lang ) {
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lang = lang || wgUserLanguage;
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if ( typeof offset == 'object' && lang in offset ) {
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return offset[lang];
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} else if ( typeof icon == 'object' && lang in icon ) {
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return $.wikiEditor.autoIcon( icon, undefined, lang );
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} else {
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return $.wikiEditor.autoLang( offset, lang );
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}
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}
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};
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/**
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* jQuery plugin that provides a way to initialize a wikiEditor instance on a textarea.
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*/
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$.fn.wikiEditor = function() {
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// Skip any further work when running in browsers that are unsupported
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if ( !$j.wikiEditor.isSupported() ) {
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return $(this);
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}
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/* Initialization */
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// The wikiEditor context is stored in the element's data, so when this function gets called again we can pick up right
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// where we left off
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var context = $(this).data( 'wikiEditor-context' );
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// On first call, we need to set things up, but on all following calls we can skip right to the API handling
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if ( !context || typeof context == 'undefined' ) {
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// Star filling the context with useful data - any jQuery selections, as usual should be named with a preceding $
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context = {
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// Reference to the textarea element which the wikiEditor is being built around
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'$textarea': $(this),
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// Container for any number of mutually exclusive views that are accessible by tabs
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'views': {},
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// Container for any number of module-specific data - only including data for modules in use on this context
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'modules': {},
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// General place to shouve bits of data into
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'data': {},
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// Unique numeric ID of this instance used both for looking up and differentiating instances of wikiEditor
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'instance': $.wikiEditor.instances.push( $(this) ) - 1,
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// Array mapping elements in the textarea to character offsets
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'offsets': null,
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// Cache for context.fn.htmlToText()
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'htmlToTextMap': {},
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// The previous HTML of the iframe, stored to detect whether something really changed.
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'oldHTML': null,
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// Same for delayedChange()
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'oldDelayedHTML': null,
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// The previous selection of the iframe, stored to detect whether the selection has changed
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'oldDelayedSel': null,
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// Saved selection state for IE
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'savedSelection': null,
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// Stack of states in { html: [string] } form
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'history': [],
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// Current history state position - this is number of steps backwards, so it's always -1 or less
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'historyPosition': -1,
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/// The previous historyPosition, stored to detect if change events were due to an undo or redo action
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'oldDelayedHistoryPosition': -1,
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// List of extensions active on this context
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'extensions': [],
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};
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/*
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* Externally Accessible API
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*
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* These are available using calls to $j(selection).wikiEditor( call, data ) where selection is a jQuery selection
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* of the textarea that the wikiEditor instance was built around.
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*/
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context.api = {
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/**
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* Activates a module on a specific context with optional configuration data.
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*
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* @param data Either a string of the name of a module to add without any additional configuration parameters,
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* or an object with members keyed with module names and valued with configuration objects.
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*/
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'addModule': function( context, data ) {
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var modules = {};
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if ( typeof data == 'string' ) {
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modules[data] = {};
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} else if ( typeof data == 'object' ) {
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modules = data;
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}
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for ( var module in modules ) {
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// Check for the existance of an available / supported module with a matching name and a create function
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if ( typeof module == 'string' && $.wikiEditor.isSupported( $.wikiEditor.modules[module] ) ) {
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// Extend the context's core API with this module's own API calls
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if ( 'api' in $.wikiEditor.modules[module] ) {
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for ( var call in $.wikiEditor.modules[module].api ) {
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// Modules may not overwrite existing API functions - first come, first serve
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if ( !( call in context.api ) ) {
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context.api[call] = $.wikiEditor.modules[module].api[call];
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}
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}
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}
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// Activate the module on this context
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if ( 'fn' in $.wikiEditor.modules[module] && 'create' in $.wikiEditor.modules[module].fn ) {
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// Add a place for the module to put it's own stuff
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context.modules[module] = {};
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// Tell the module to create itself on the context
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$.wikiEditor.modules[module].fn.create( context, modules[module] );
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}
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}
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}
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}
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};
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/*
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* Event Handlers
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*
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* These act as filters returning false if the event should be ignored or returning true if it should be passed
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* on to all modules. This is also where we can attach some extra information to the events.
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*/
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context.evt = {
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/**
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* Filters change events, which occur when the user interacts with the contents of the iframe. The goal of this
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* function is to both classify the scope of changes as 'division' or 'character' and to prevent further
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* processing of events which did not actually change the content of the iframe.
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*/
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'keydown': function( event ) {
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switch ( event.which ) {
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case 90: // z
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case 89: // y
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if ( event.which == 89 && !$.browser.msie ) {
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// only handle y events for IE
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return true;
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} else if ( ( event.ctrlKey || event.metaKey ) && context.history.length ) {
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// HistoryPosition is a negative number between -1 and -context.history.length, in other words
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// it's the number of steps backwards from the latest state.
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var newPosition;
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if ( event.shiftKey || event.which == 89 ) {
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// Redo
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newPosition = context.historyPosition + 1;
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} else {
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// Undo
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newPosition = context.historyPosition - 1;
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}
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// Only act if we are switching to a valid state
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if ( newPosition >= ( context.history.length * -1 ) && newPosition < 0 ) {
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// Make sure we run the history storing code before we make this change
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context.fn.updateHistory( context.oldDelayedHTML != context.$content.html() );
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context.oldDelayedHistoryPosition = context.historyPosition;
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context.historyPosition = newPosition;
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// Change state
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// FIXME: Destroys event handlers, will be a problem with template folding
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context.$content.html(
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context.history[context.history.length + context.historyPosition].html
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);
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context.fn.purgeOffsets();
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if( context.history[context.history.length + context.historyPosition].sel ) {
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context.fn.setSelection( {
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start: context.history[context.history.length + context.historyPosition].sel[0],
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end: context.history[context.history.length + context.historyPosition].sel[1]
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} );
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}
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}
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// Prevent the browser from jumping in and doing its stuff
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return false;
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}
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break;
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// Intercept all tab events to provide consisten behavior across browsers
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// Webkit browsers insert tab characters by default into the iframe rather than changing input focus
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case 9: //tab
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// if any modifier keys are pressed, allow the browser to do it's thing
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if ( event.ctrlKey || event.altKey || event.shiftKey ) {
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return true;
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} else {
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var $tabindexList = $j( '[tabindex]:visible' ).sort( function( a, b ) {
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return a.tabIndex - b.tabIndex;
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} );
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for( var i=0; i < $tabindexList.length; i++ ) {
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if( $tabindexList.eq( i ).attr('id') == context.$iframe.attr( 'id' ) ) {
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$tabindexList.get( i + 1 ).focus();
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break;
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}
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}
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return false;
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}
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break;
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case 86: //v
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if ( event.ctrlKey && $.browser.msie && 'paste' in context.evt ) {
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//paste, intercepted for IE
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context.evt.paste( event );
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}
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break;
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}
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return true;
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}
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};
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/* Internal Functions */
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context.fn = {
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/**
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* Executes core event filters as well as event handlers provided by modules.
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*/
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'trigger': function( name, event ) {
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// Event is an optional argument, but from here on out, at least the type field should be dependable
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if ( typeof event == 'undefined' ) {
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event = { 'type': 'custom' };
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}
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// Ensure there's a place for extra information to live
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if ( typeof event.data == 'undefined' ) {
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event.data = {};
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}
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// Allow filtering to occur
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if ( name in context.evt ) {
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if ( !context.evt[name]( event ) ) {
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return false;
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}
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}
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var returnFromModules = null; //they return null by default
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// Pass the event around to all modules activated on this context
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for ( var module in context.modules ) {
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if (
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module in $.wikiEditor.modules &&
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'evt' in $.wikiEditor.modules[module] &&
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name in $.wikiEditor.modules[module].evt
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) {
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var ret = $.wikiEditor.modules[module].evt[name]( context, event );
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if (ret != null) {
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//if 1 returns false, the end result is false
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if( returnFromModules == null ) {
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returnFromModules = ret;
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} else {
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returnFromModules = returnFromModules && ret;
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}
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}
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}
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}
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if ( returnFromModules != null ) {
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return returnFromModules;
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} else {
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return true;
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}
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},
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/**
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* Adds a button to the UI
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*/
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'addButton': function( options ) {
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// Ensure that buttons and tabs are visible
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context.$controls.show();
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context.$buttons.show();
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return $( '<button />' )
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.text( $.wikiEditor.autoMsg( options, 'caption' ) )
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.click( options.action )
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.appendTo( context.$buttons );
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},
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/**
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* Adds a view to the UI, which is accessed using a set of tabs. Views are mutually exclusive and by default a
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* wikitext view will be present. Only when more than one view exists will the tabs will be visible.
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*/
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'addView': function( options ) {
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// Adds a tab
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function addTab( options ) {
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// Ensure that buttons and tabs are visible
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context.$controls.show();
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context.$tabs.show();
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// Return the newly appended tab
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return $( '<div></div>' )
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.attr( 'rel', 'wikiEditor-ui-view-' + options.name )
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.addClass( context.view == options.name ? 'current' : null )
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.append( $( '<a></a>' )
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.attr( 'href', '#' )
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.mousedown( function() {
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// No dragging!
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return false;
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} )
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.click( function( event ) {
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context.$ui.find( '.wikiEditor-ui-view' ).hide();
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context.$ui.find( '.' + $(this).parent().attr( 'rel' ) ).show();
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context.$tabs.find( 'div' ).removeClass( 'current' );
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$(this).parent().addClass( 'current' );
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$(this).blur();
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if ( 'init' in options && typeof options.init == 'function' ) {
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options.init( context );
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}
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event.preventDefault();
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return false;
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} )
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.text( $.wikiEditor.autoMsg( options, 'title' ) )
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)
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.appendTo( context.$tabs );
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}
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// Automatically add the previously not-needed wikitext tab
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if ( !context.$tabs.children().size() ) {
|
|
addTab( { 'name': 'wikitext', 'titleMsg': 'wikieditor-wikitext-tab' } );
|
|
}
|
|
// Add the tab for the view we were actually asked to add
|
|
addTab( options );
|
|
// Return newly appended view
|
|
return $( '<div></div>' )
|
|
.addClass( 'wikiEditor-ui-view wikiEditor-ui-view-' + options.name )
|
|
.hide()
|
|
.appendTo( context.$ui );
|
|
},
|
|
/**
|
|
* Save scrollTop and cursor position for IE
|
|
*/
|
|
'saveCursorAndScrollTop': function() {
|
|
if ( $.client.name === 'msie' ) {
|
|
var IHateIE = {
|
|
'scrollTop' : context.$textarea.scrollTop(),
|
|
'pos': context.$textarea.textSelection( 'getCaretPosition', { startAndEnd: true } )
|
|
};
|
|
context.$textarea.data( 'IHateIE', IHateIE );
|
|
}
|
|
},
|
|
/**
|
|
* Restore scrollTo and cursor position for IE
|
|
*/
|
|
'restoreCursorAndScrollTop': function() {
|
|
if ( $.client.name === 'msie' ) {
|
|
var IHateIE = context.$textarea.data( 'IHateIE' );
|
|
if ( IHateIE ) {
|
|
context.$textarea.scrollTop( IHateIE.scrollTop );
|
|
context.$textarea.textSelection( 'setSelection', { start: IHateIE.pos[0], end: IHateIE.pos[1] } );
|
|
context.$textarea.data( 'IHateIE', null );
|
|
}
|
|
}
|
|
},
|
|
/**
|
|
* Save text selection for IE
|
|
*/
|
|
'saveSelection': function() {
|
|
if ( $.client.name === 'msie' ) {
|
|
context.$textarea.focus();
|
|
context.savedSelection = document.selection.createRange();
|
|
}
|
|
},
|
|
/**
|
|
* Restore text selection for IE
|
|
*/
|
|
'restoreSelection': function() {
|
|
if ( $.client.name === 'msie' && context.savedSelection !== null ) {
|
|
context.$textarea.focus();
|
|
context.savedSelection.select();
|
|
context.savedSelection = null;
|
|
}
|
|
},
|
|
};
|
|
|
|
/*
|
|
* Base UI Construction
|
|
*
|
|
* The UI is built from several containers, the outer-most being a div classed as "wikiEditor-ui". These containers
|
|
* provide a certain amount of "free" layout, but in some situations procedural layout is needed, which is performed
|
|
* as a response to the "resize" event.
|
|
*/
|
|
|
|
// Assemble a temporary div to place over the wikiEditor while it's being constructed
|
|
/* Disabling our loading div for now
|
|
var $loader = $( '<div></div>' )
|
|
.addClass( 'wikiEditor-ui-loading' )
|
|
.append( $( '<span>' + mediaWiki.msg( 'wikieditor-loading' ) + '</span>' )
|
|
.css( 'marginTop', context.$textarea.height() / 2 ) );
|
|
*/
|
|
// Encapsulate the textarea with some containers for layout
|
|
context.$textarea
|
|
/* Disabling our loading div for now
|
|
.after( $loader )
|
|
.add( $loader )
|
|
*/
|
|
.wrapAll( $( '<div></div>' ).addClass( 'wikiEditor-ui' ) )
|
|
.wrapAll( $( '<div></div>' ).addClass( 'wikiEditor-ui-view wikiEditor-ui-view-wikitext' ) )
|
|
.wrapAll( $( '<div></div>' ).addClass( 'wikiEditor-ui-left' ) )
|
|
.wrapAll( $( '<div></div>' ).addClass( 'wikiEditor-ui-bottom' ) )
|
|
.wrapAll( $( '<div></div>' ).addClass( 'wikiEditor-ui-text' ) );
|
|
// Get references to some of the newly created containers
|
|
context.$ui = context.$textarea.parent().parent().parent().parent().parent();
|
|
context.$wikitext = context.$textarea.parent().parent().parent().parent();
|
|
// Add in tab and button containers
|
|
context.$wikitext
|
|
.before(
|
|
$( '<div></div>' ).addClass( 'wikiEditor-ui-controls' )
|
|
.append( $( '<div></div>' ).addClass( 'wikiEditor-ui-tabs' ).hide() )
|
|
.append( $( '<div></div>' ).addClass( 'wikiEditor-ui-buttons' ) )
|
|
)
|
|
.before( $( '<div style="clear:both;"></div>' ) );
|
|
// Get references to some of the newly created containers
|
|
context.$controls = context.$ui.find( '.wikiEditor-ui-buttons' ).hide();
|
|
context.$buttons = context.$ui.find( '.wikiEditor-ui-buttons' );
|
|
context.$tabs = context.$ui.find( '.wikiEditor-ui-tabs' );
|
|
// Clear all floating after the UI
|
|
context.$ui.after( $( '<div style="clear:both;"></div>' ) );
|
|
// Attach a right container
|
|
context.$wikitext.append( $( '<div></div>' ).addClass( 'wikiEditor-ui-right' ) );
|
|
// Attach a top container to the left pane
|
|
context.$wikitext.find( '.wikiEditor-ui-left' ).prepend( $( '<div></div>' ).addClass( 'wikiEditor-ui-top' ) );
|
|
// Setup the intial view
|
|
context.view = 'wikitext';
|
|
// Trigger the "resize" event anytime the window is resized
|
|
$( window ).resize( function( event ) { context.fn.trigger( 'resize', event ); } );
|
|
}
|
|
|
|
/* API Execution */
|
|
|
|
// Since javascript gives arguments as an object, we need to convert them so they can be used more easily
|
|
var args = $.makeArray( arguments );
|
|
|
|
// Dynamically setup core extensions for modules that are required
|
|
if ( args[0] == 'addModule' && typeof args[1] != 'undefined' ) {
|
|
var modules = args[1];
|
|
if ( typeof modules != "object" ) {
|
|
modules = {};
|
|
modules[args[1]] = '';
|
|
}
|
|
for ( module in modules ) {
|
|
// Only allow modules which are supported (and thus actually being turned on) affect the decision to extend
|
|
if ( module in $.wikiEditor.modules && $.wikiEditor.isSupported( $.wikiEditor.modules[module] ) ) {
|
|
// Activate all required core extensions on context
|
|
for ( e in $.wikiEditor.extensions ) {
|
|
if (
|
|
$.wikiEditor.isRequired( $.wikiEditor.modules[module], e ) &&
|
|
context.extensions.indexOf( e ) === -1
|
|
) {
|
|
context.extensions[context.extensions.length] = e;
|
|
$.wikiEditor.extensions[e]( context );
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// There would need to be some arguments if the API is being called
|
|
if ( args.length > 0 ) {
|
|
// Handle API calls
|
|
var call = args.shift();
|
|
if ( call in context.api ) {
|
|
context.api[call]( context, typeof args[0] == 'undefined' ? {} : args[0] );
|
|
}
|
|
}
|
|
|
|
// Store the context for next time, and support chaining
|
|
return $(this).data( 'wikiEditor-context', context );
|
|
|
|
}; } )( jQuery );
|