bpmn-js/lib/BaseModeler.js

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import inherits from 'inherits';
import Ids from 'ids';
import BaseViewer from './BaseViewer';
/**
* A base modeler for BPMN 2.0 diagrams.
*
* Have a look at {@link Modeler} for a bundle that includes actual features.
*
* @param {Object} [options] configuration options to pass to the viewer
* @param {DOMElement} [options.container] the container to render the viewer in, defaults to body.
* @param {string|number} [options.width] the width of the viewer
* @param {string|number} [options.height] the height of the viewer
* @param {Object} [options.moddleExtensions] extension packages to provide
* @param {Array<didi.Module>} [options.modules] a list of modules to override the default modules
* @param {Array<didi.Module>} [options.additionalModules] a list of modules to use with the default modules
*/
export default function BaseModeler(options) {
BaseViewer.call(this, options);
// hook ID collection into the modeler
this.on('import.parse.complete', function(event) {
if (!event.error) {
this._collectIds(event.definitions, event.context);
}
}, this);
this.on('diagram.destroy', function() {
this.get('moddle').ids.clear();
}, this);
}
inherits(BaseModeler, BaseViewer);
/**
* Create a moddle instance, attaching ids to it.
*
* @param {Object} options
*/
BaseModeler.prototype._createModdle = function(options) {
var moddle = BaseViewer.prototype._createModdle.call(this, options);
// attach ids to moddle to be able to track
// and validated ids in the BPMN 2.0 XML document
// tree
moddle.ids = new Ids([ 32, 36, 1 ]);
return moddle;
};
/**
* Collect ids processed during parsing of the
* definitions object.
*
* @param {ModdleElement} definitions
* @param {Context} context
*/
BaseModeler.prototype._collectIds = function(definitions, context) {
var moddle = definitions.$model,
ids = moddle.ids,
id;
// remove references from previous import
ids.clear();
for (id in context.elementsById) {
ids.claim(id, context.elementsById[id]);
}
};