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/**
* @class mw.template
* @singleton
*/
( function ( mw, $ ) {
var compiledTemplates = {},
compilers = {};
mw.template = {
/**
* Register a new compiler.
*
* A compiler is any object that implements a compile() method. The compile() method must
* return a Template interface with a method render() that returns HTML.
*
* The compiler name must correspond with the name suffix of templates that use this compiler.
*
* @param {string} name Compiler name
* @param {Object} compiler
*/
registerCompiler: function ( name, compiler ) {
if ( !compiler.compile ) {
throw new Error( 'Compiler must implement a compile method' );
}
compilers[ name ] = compiler;
},
/**
* Get the name of the associated compiler based on a template name.
*
* @param {string} templateName Name of a template (including suffix)
* @return {string} Name of a compiler
*/
getCompilerName: function ( templateName ) {
var nameParts = templateName.split( '.' );
if ( nameParts.length < 2 ) {
throw new Error( 'Template name must have a suffix' );
}
return nameParts[ nameParts.length - 1 ];
},
/**
* Get a compiler via its name.
*
* @param {string} name Name of a compiler
* @return {Object} The compiler
*/
getCompiler: function ( name ) {
var compiler = compilers[ name ];
if ( !compiler ) {
throw new Error( 'Unknown compiler ' + name );
}
return compiler;
},
/**
* Register a template associated with a module.
*
* Precompiles the newly added template based on the suffix in its name.
*
* @param {string} moduleName Name of the ResourceLoader module the template is associated with
* @param {string} templateName Name of the template (including suffix)
* @param {string} templateBody Contents of the template (e.g. html markup)
* @return {Object} Compiled template
*/
add: function ( moduleName, templateName, templateBody ) {
// Precompile and add to cache
var compiled = this.compile( templateBody, this.getCompilerName( templateName ) );
if ( !compiledTemplates[ moduleName ] ) {
compiledTemplates[ moduleName ] = {};
}
compiledTemplates[ moduleName ][ templateName ] = compiled;
return compiled;
},
/**
* Get a compiled template by module and template name.
*
* @param {string} moduleName Name of the module to retrieve the template from
* @param {string} templateName Name of template to be retrieved
* @return {Object} Compiled template
*/
get: function ( moduleName, templateName ) {
var moduleTemplates;
// Try cache first
if ( compiledTemplates[ moduleName ] && compiledTemplates[ moduleName ][ templateName ] ) {
return compiledTemplates[ moduleName ][ templateName ];
}
moduleTemplates = mw.templates.get( moduleName );
if ( !moduleTemplates || !moduleTemplates[ templateName ] ) {
throw new Error( 'Template ' + templateName + ' not found in module ' + moduleName );
}
// Compiled and add to cache
return this.add( moduleName, templateName, moduleTemplates[ templateName ] );
},
/**
* Compile a string of template markup with an engine of choice.
*
* @param {string} templateBody Template body
* @param {string} compilerName The name of a registered compiler
* @return {Object} Compiled template
*/
compile: function ( templateBody, compilerName ) {
return this.getCompiler( compilerName ).compile( templateBody );
}
};
// Register basic html compiler
mw.template.registerCompiler( 'html', {
compile: function ( src ) {
return {
render: function () {
return $( $.parseHTML( src.trim() ) );
}
};
}
} );
}( mediaWiki, jQuery ) );
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