mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/WikiEditor
synced 2024-09-23 10:26:26 +00:00
515 lines
18 KiB
JavaScript
515 lines
18 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 initialize without any modules:
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* $( '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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* $( 'textarea#wpTextbox1' ).wikiEditor( 'addModule', 'toolbar', { ... config ... } );
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*
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*/
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( function ( $, mw ) {
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var hasOwn = Object.prototype.hasOwnProperty,
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/**
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* Array of language codes.
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*/
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fallbackChain = ( function () {
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var isRTL = $( 'body' ).hasClass( 'rtl' ),
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chain = mw.language.getFallbackLanguageChain();
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// Do not fallback to 'en'
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if ( chain.length >= 2 && !/^en-/.test( chain[ chain.length - 2 ] ) ) {
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chain.pop();
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}
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if ( isRTL ) {
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chain.push( 'default-rtl' );
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}
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chain.push( 'default' );
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return chain;
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}() );
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/**
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* Global static object for wikiEditor that provides generally useful functionality to all modules and contexts.
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*/
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$.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 existence 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 convenient 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 corresponds 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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* 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: mw.config.get( 'wgExtensionAssetsPath' ) + '/WikiEditor/modules/images/',
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/**
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* Checks if a module has a specific requirement
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*
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* @param {Object} module Module object
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* @param {string} requirement String identifying requirement
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* @return {boolean}
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*/
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isRequired: function ( module, requirement ) {
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var req;
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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 a mw.message( ... ).text() call.
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*
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* @param {Object} object Object to extract messages from
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* @param {string} 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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* @return {string}
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*/
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autoMsg: function ( object, property ) {
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var i, p;
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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 ( 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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p = object[ property + 'Msg' ];
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if ( Array.isArray( p ) && p.length >= 2 ) {
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return mw.message.apply( mw.message, p ).text();
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} else {
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return mw.message( p ).text();
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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' or 'default-rtl'. If such key doesn't exist, the object itself is considered the actual value, which
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* should ideally be the case so that you may use a string or object of any number of strings keyed by language
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* with a default.
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*
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* @param {Object} object Object to extract property from
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* @return {Object}
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*/
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autoLang: function ( object ) {
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var i, key;
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for ( i = 0; i < fallbackChain.length; i++ ) {
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key = fallbackChain[ i ];
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if ( hasOwn.call( object, key ) ) {
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return object[ key ];
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}
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}
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return 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 {Object} icon Icon object from e.g. toolbar config
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* @param {string} path Default icon path, defaults to $.wikiEditor.imgPath
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* @return {Object}
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*/
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autoIcon: function ( icon, path ) {
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var i, key, src;
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path = path || $.wikiEditor.imgPath;
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for ( i = 0; i < fallbackChain.length; i++ ) {
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key = fallbackChain[ i ];
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if ( icon && hasOwn.call( icon, key ) ) {
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src = icon[ key ];
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// Prepend path if src is not absolute
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if ( src.substr( 0, 7 ) !== 'http://' && src.substr( 0, 8 ) !== 'https://' && src[ 0 ] !== '/' ) {
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src = path + src;
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}
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return src + '?' + mw.loader.getVersion( 'jquery.wikiEditor' );
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}
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}
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return icon;
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}
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};
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/**
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* jQuery plugin that provides a way to initialize a wikiEditor instance on a textarea.
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*
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* @return {jQuery}
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*/
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$.fn.wikiEditor = function () {
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var context, hasFocus, cursorPos,
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args, modules, module, e, call;
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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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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 shove 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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// Saved selection state for old IE (<=10)
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savedSelection: null,
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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 $( 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 module, call,
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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 ( module in modules ) {
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// Check for the existence of an available module with a matching name and a create function
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if ( typeof module === 'string' && typeof $.wikiEditor.modules[ module ] !== 'undefined' ) {
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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 ( 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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/* Empty until extensions add some; see jquery.wikiEditor.iframe.js for examples. */
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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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* @param {string} name
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* @param {Object} event
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* @return {boolean}
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*/
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trigger: function ( name, event ) {
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var returnFromModules, module, ret;
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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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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 ( 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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ret = $.wikiEditor.modules[ module ].evt[ name ]( context, event );
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if ( ret !== null ) {
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// if 1 returns false, the end result is false
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if ( returnFromModules === null ) {
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returnFromModules = ret;
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} else {
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returnFromModules = returnFromModules && ret;
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}
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}
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}
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}
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if ( returnFromModules !== null ) {
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return returnFromModules;
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} else {
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return true;
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}
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},
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/**
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* Adds a button to the UI
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*
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* @param {Object} options
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* @return {jQuery}
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*/
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addButton: function ( options ) {
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// Ensure that buttons and tabs are visible
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context.$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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* @param {Object} options
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* @return {jQuery}
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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>' )
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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( $( '<a>' )
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.attr( 'href', '#' )
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.mousedown( function () {
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// No dragging!
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return false;
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} )
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.click( function ( event ) {
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context.$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().length ) {
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addTab( { name: 'wikitext', titleMsg: 'wikieditor-wikitext-tab' } );
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}
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// Add the tab for the view we were actually asked to add
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addTab( options );
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// Return newly appended view
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return $( '<div>' )
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.addClass( 'wikiEditor-ui-view wikiEditor-ui-view-' + options.name )
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.hide()
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.appendTo( context.$ui );
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},
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/**
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* Save text selection
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*/
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saveSelection: function () {
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context.$textarea.focus();
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context.savedSelection = {
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selectionStart: context.$textarea[ 0 ].selectionStart,
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selectionEnd: context.$textarea[ 0 ].selectionEnd
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};
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},
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/**
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* Restore text selection
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*/
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restoreSelection: function () {
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if ( context.savedSelection ) {
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context.$textarea.focus();
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context.$textarea[ 0 ].setSelectionRange( context.savedSelection.selectionStart, context.savedSelection.selectionEnd );
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context.savedSelection = null;
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}
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}
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};
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/**
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* Base UI Construction
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*
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* The UI is built from several containers, the outer-most being a div classed as "wikiEditor-ui". These containers
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* provide a certain amount of "free" layout, but in some situations procedural layout is needed, which is performed
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* as a response to the "resize" event.
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*/
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// Assemble a temporary div to place over the wikiEditor while it's being constructed
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/* Disabling our loading div for now
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var $loader = $( '<div>' )
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.addClass( 'wikiEditor-ui-loading' )
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.append( $( '<span>' + mw.msg( 'wikieditor-loading' ) + '</span>' )
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.css( 'marginTop', context.$textarea.height() / 2 ) );
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*/
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/* Preserving cursor and focus state, which will get lost due to wrapAll */
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hasFocus = context.$textarea.is( ':focus' );
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cursorPos = context.$textarea.textSelection( 'getCaretPosition', { startAndEnd: true } );
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// Encapsulate the textarea with some containers for layout
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context.$textarea
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/* Disabling our loading div for now
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.after( $loader )
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.add( $loader )
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*/
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.wrapAll( $( '<div>' ).addClass( 'wikiEditor-ui' ) )
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.wrapAll( $( '<div>' ).addClass( 'wikiEditor-ui-view wikiEditor-ui-view-wikitext' ) )
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.wrapAll( $( '<div>' ).addClass( 'wikiEditor-ui-left' ) )
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.wrapAll( $( '<div>' ).addClass( 'wikiEditor-ui-bottom' ) )
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.wrapAll( $( '<div>' ).addClass( 'wikiEditor-ui-text' ) );
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// Restore scroll position after this wrapAll (tracked by mediawiki.action.edit)
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context.$textarea.prop( 'scrollTop', $( '#wpScrolltop' ).val() );
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// Restore focus and cursor if needed
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if ( hasFocus ) {
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context.$textarea.focus();
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context.$textarea.textSelection( 'setSelection', { start: cursorPos[ 0 ], end: cursorPos[ 1 ] } );
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}
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// Get references to some of the newly created containers
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context.$ui = context.$textarea.parent().parent().parent().parent().parent();
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context.$wikitext = context.$textarea.parent().parent().parent().parent();
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// Add in tab and button containers
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context.$wikitext
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.before(
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$( '<div>' ).addClass( 'wikiEditor-ui-controls' )
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.append( $( '<div>' ).addClass( 'wikiEditor-ui-tabs' ).hide() )
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.append( $( '<div>' ).addClass( 'wikiEditor-ui-buttons' ) )
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)
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.before( $( '<div>' ).addClass( 'wikiEditor-ui-clear' ) );
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// Get references to some of the newly created containers
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context.$controls = context.$ui.find( '.wikiEditor-ui-buttons' ).hide();
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context.$buttons = context.$ui.find( '.wikiEditor-ui-buttons' );
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context.$tabs = context.$ui.find( '.wikiEditor-ui-tabs' );
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// Clear all floating after the UI
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context.$ui.after( $( '<div>' ).addClass( 'wikiEditor-ui-clear' ) );
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// Attach a right container
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context.$wikitext.append( $( '<div>' ).addClass( 'wikiEditor-ui-right' ) );
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context.$wikitext.append( $( '<div>' ).addClass( 'wikiEditor-ui-clear' ) );
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// Attach a top container to the left pane
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context.$wikitext.find( '.wikiEditor-ui-left' ).prepend( $( '<div>' ).addClass( 'wikiEditor-ui-top' ) );
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// Setup the initial view
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context.view = 'wikitext';
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// Trigger the "resize" event anytime the window is resized
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$( window ).resize( function ( event ) {
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context.fn.trigger( 'resize', event );
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} );
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}
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/* API Execution */
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// Since javascript gives arguments as an object, we need to convert them so they can be used more easily
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args = $.makeArray( arguments );
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// Dynamically setup core extensions for modules that are required
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if ( args[ 0 ] === 'addModule' && typeof args[ 1 ] !== 'undefined' ) {
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modules = args[ 1 ];
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if ( typeof modules !== 'object' ) {
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modules = {};
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modules[ args[ 1 ] ] = '';
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}
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for ( module in modules ) {
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if ( module in $.wikiEditor.modules ) {
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// Activate all required core extensions on context
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for ( e in $.wikiEditor.extensions ) {
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if (
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$.wikiEditor.isRequired( $.wikiEditor.modules[ module ], e ) &&
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$.inArray( e, context.extensions ) === -1
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) {
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context.extensions[ context.extensions.length ] = e;
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$.wikiEditor.extensions[ e ]( context );
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}
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}
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break;
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}
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}
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}
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// There would need to be some arguments if the API is being called
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if ( args.length > 0 ) {
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// Handle API calls
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call = args.shift();
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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, mediaWiki ) );
|