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* VisualEditor DataModel Resizable node.
*
* @copyright See AUTHORS.txt
*/
/**
* A mixin class for resizable nodes. This class is mostly a base
* interface for resizable nodes to be able to produce scalable
* objects for further calculation.
*
* @class
* @abstract
* @constructor
*/
ve.dm.ResizableNode = function VeDmResizableNode() {
this.scalable = null;
this.connect( this, { attributeChange: 'onResizableAttributeChange' } );
};
/* Inheritance */
OO.initClass( ve.dm.ResizableNode );
/**
* Get a scalable object for this node.
*
* #createScalable is called if one doesn't already exist.
*
* @return {ve.dm.Scalable}
*/
ve.dm.ResizableNode.prototype.getScalable = function () {
if ( !this.scalable ) {
this.scalable = this.createScalable();
}
return this.scalable;
};
/**
* Create a scalable object based on the current object's width and height.
*
* @abstract
* @return {ve.dm.Scalable}
*/
ve.dm.ResizableNode.prototype.createScalable = null;
/**
* Handle attribute change events from the model.
*
* @param {string} key Attribute key
* @param {string} from Old value
* @param {string} to New value
*/
ve.dm.ResizableNode.prototype.onResizableAttributeChange = function ( key ) {
if ( key === 'width' || key === 'height' ) {
this.getScalable().setCurrentDimensions( this.getCurrentDimensions() );
}
};
/**
* Get the current dimensions from the model
*
* @return {Object} Current dimensions
*/
ve.dm.ResizableNode.prototype.getCurrentDimensions = function () {
return {
width: this.getAttribute( 'width' ),
height: this.getAttribute( 'height' )
};
};
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