bpmn-js/lib/import/Importer.js

70 lines
1.5 KiB
JavaScript

import BpmnTreeWalker from './BpmnTreeWalker';
/**
* Import the definitions into a diagram.
*
* Errors and warnings are reported through the specified callback.
*
* @param {Diagram} diagram
* @param {ModdleElement} definitions
* @param {Function} done the callback, invoked with (err, [ warning ]) once the import is done
*/
export function importBpmnDiagram(diagram, definitions, done) {
var importer,
eventBus,
translate;
var error,
warnings = [];
/**
* Walk the diagram semantically, importing (=drawing)
* all elements you encounter.
*
* @param {ModdleElement} definitions
*/
function render(definitions) {
var visitor = {
root: function(element) {
return importer.add(element);
},
element: function(element, parentShape) {
return importer.add(element, parentShape);
},
error: function(message, context) {
warnings.push({ message: message, context: context });
}
};
var walker = new BpmnTreeWalker(visitor, translate);
// traverse BPMN 2.0 document model,
// starting at definitions
walker.handleDefinitions(definitions);
}
try {
importer = diagram.get('bpmnImporter');
eventBus = diagram.get('eventBus');
translate = diagram.get('translate');
eventBus.fire('import.render.start', { definitions: definitions });
render(definitions);
eventBus.fire('import.render.complete', {
error: error,
warnings: warnings
});
} catch (e) {
error = e;
}
done(error, warnings);
}