mediawiki-extensions-Visual.../modules/ve2/dm/ve.dm.BranchNode.js
Trevor Parscal 58aa0e8137 Whitespace fixes and cleanup
Change-Id: Id2220009ed7af7e895990dd4bb373b43d6089b7b
2012-05-16 20:26:05 -07:00

121 lines
3.1 KiB
JavaScript

/**
* DataModel node that can have branch or leaf children.
*
* @class
* @abstract
* @constructor
* @extends {ve.BranchNode}
* @extends {ve.dm.Node}
* @param {String} type Symbolic name of node type
* @param {ve.dm.Node[]} [children] Child nodes to attach
* @param {Object} [attributes] Reference to map of attribute key/value pairs
*/
ve.dm.BranchNode = function( type, children, attributes ) {
// Inheritance
ve.dm.Node.call( this, type, 0, attributes );
ve.BranchNode.call( this );
if ( ve.isArray( children ) && children.length ) {
this.splice.apply( this, [0, 0].concat( children ) );
}
};
/* Methods */
/**
* Adds a node to the end of this node's children.
*
* @method
* @param {ve.dm.BranchNode} childModel Item to add
* @returns {Integer} New number of children
* @emits splice (index, 0, [childModel])
* @emits update
*/
ve.dm.BranchNode.prototype.push = function( childModel ) {
this.splice( this.children.length, 0, childModel );
return this.children.length;
};
/**
* Removes a node from the end of this node's children
*
* @method
* @returns {ve.dm.BranchNode} Removed childModel
* @emits splice (index, 1, [])
* @emits update
*/
ve.dm.BranchNode.prototype.pop = function() {
if ( this.children.length ) {
var childModel = this.children[this.children.length - 1];
this.splice( this.children.length - 1, 1 );
return childModel;
}
};
/**
* Adds a node to the beginning of this node's children.
*
* @method
* @param {ve.dm.BranchNode} childModel Item to add
* @returns {Integer} New number of children
* @emits splice (0, 0, [childModel])
* @emits update
*/
ve.dm.BranchNode.prototype.unshift = function( childModel ) {
this.splice( 0, 0, childModel );
return this.children.length;
};
/**
* Removes a node from the beginning of this node's children
*
* @method
* @returns {ve.dm.BranchNode} Removed childModel
* @emits splice (0, 1, [])
* @emits update
*/
ve.dm.BranchNode.prototype.shift = function() {
if ( this.children.length ) {
var childModel = this.children[0];
this.splice( 0, 1 );
return childModel;
}
};
/**
* Adds and removes nodes from this node's children.
*
* @method
* @param {Integer} index Index to remove and or insert nodes at
* @param {Integer} howmany Number of nodes to remove
* @param {ve.dm.BranchNode} [...] Variadic list of nodes to insert
* @returns {ve.dm.BranchNode[]} Removed nodes
* @emits splice (index, howmany, [...])
*/
ve.dm.BranchNode.prototype.splice = function( index, howmany ) {
var i,
length,
args = Array.prototype.slice.call( arguments, 0 ),
diff = 0;
if ( args.length >= 3 ) {
length = args.length;
for ( i = 2; i < length; i++ ) {
args[i].attach( this );
diff += args[i].getOuterLength();
}
}
var removals = this.children.splice.apply( this.children, args );
for ( i = 0, length = removals.length; i < length; i++ ) {
removals[i].detach();
diff -= removals[i].getOuterLength();
}
this.adjustLength( diff, true );
this.emit.apply( this, ['splice'].concat( args ) );
return removals;
};
/* Inheritance */
ve.extendClass( ve.dm.BranchNode, ve.BranchNode );
ve.extendClass( ve.dm.BranchNode, ve.dm.Node );