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* VisualEditor KeyDownHandlerFactory class.
*
* @copyright See AUTHORS.txt
*/
/**
* Key down handler factory.
*
* @class
* @extends OO.Factory
* @constructor
*/
ve.ce.KeyDownHandlerFactory = function VeCeKeyDownHandlerFactory() {
// Parent constructor
ve.ce.KeyDownHandlerFactory.super.apply( this, arguments );
// Handlers which match all kinds and a specific type
this.handlerNamesByKeys = {};
};
/* Inheritance */
OO.inheritClass( ve.ce.KeyDownHandlerFactory, OO.Factory );
/* Methods */
/**
* Register a constructor with the factory.
*
* function MyClass() {};
* OO.initClass( MyClass );
* MyClass.static.name = 'hello';
* // Register class with the factory, available via the symbolic name "hello"
* factory.register( MyClass );
*
* See https://doc.wikimedia.org/oojs/master/OO.Factory.html
*
* @param {Function} constructor Constructor to use when creating object
* @param {string} [name] Symbolic name to use for #create().
* This parameter may be omitted in favour of letting the constructor decide
* its own name, through `constructor.static.name`.
* @throws {Error} If a parameter is invalid
*/
ve.ce.KeyDownHandlerFactory.prototype.register = function ( constructor ) {
// Parent method
ve.ce.KeyDownHandlerFactory.super.prototype.register.call( this, constructor );
var keys = constructor.static.keys;
var name = constructor.static.name;
// TODO: Clean up handlerNamesByKeys in unregister
for ( var i = 0, ilen = keys.length; i < ilen; i++ ) {
this.handlerNamesByKeys[ keys[ i ] ] = this.handlerNamesByKeys[ keys[ i ] ] || [];
Eif ( this.handlerNamesByKeys[ keys[ i ] ].indexOf( name ) === -1 ) {
this.handlerNamesByKeys[ keys[ i ] ].push( name );
}
}
};
/**
* Get the handler for a specific key
*
* @param {number} key Key code
* @param {string} selectionName Selection type name
* @return {Function[]} Matched handlers
*/
ve.ce.KeyDownHandlerFactory.prototype.lookupHandlersForKey = function ( key, selectionName ) {
var constructors = [],
names = this.handlerNamesByKeys[ key ] || [];
// Length is likely to be 1 or 0 so don't cache
for ( var i = 0; i < names.length; i++ ) {
var constructor = this.registry[ names[ i ] ];
var supportedSelections = constructor.static.supportedSelections;
if ( !supportedSelections || supportedSelections.indexOf( selectionName ) !== -1 ) {
constructors.push( constructor );
}
}
return constructors;
};
/**
* Execute the handlers for a specific key
*
* @param {number} key Key code
* @param {string} selectionName Selection type name
* @param {ve.ce.Surface} surface
* @param {jQuery.Event} e Key down event
* @return {boolean} Some handlers acted
*/
ve.ce.KeyDownHandlerFactory.prototype.executeHandlersForKey = function ( key, selectionName, surface, e ) {
var acted = false,
handlers = this.lookupHandlersForKey( key, selectionName );
// Length is likely to be 1 or 0 so don't cache
for ( var i = 0; i < handlers.length; i++ ) {
if ( handlers[ i ].static.execute( surface, e ) ) {
acted = true;
}
}
return acted;
};
/* Initialization */
ve.ce.keyDownHandlerFactory = new ve.ce.KeyDownHandlerFactory();
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