95 lines
2.2 KiB
JavaScript
95 lines
2.2 KiB
JavaScript
import BpmnTreeWalker from './BpmnTreeWalker';
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/**
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* The importBpmnDiagram result.
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*
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* @typedef {Object} ImportBPMNDiagramResult
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*
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* @property {Array<string>} warnings
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*/
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/**
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* The importBpmnDiagram error.
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*
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* @typedef {Error} ImportBPMNDiagramError
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*
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* @property {Array<string>} warnings
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*/
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/**
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* Import the definitions into a diagram.
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*
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* Errors and warnings are reported through the specified callback.
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*
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* @param {djs.Diagram} diagram
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* @param {ModdleElement<Definitions>} definitions
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* @param {ModdleElement<BPMNDiagram>} [bpmnDiagram] the diagram to be rendered
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* (if not provided, the first one will be rendered)
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*
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* Returns {Promise<ImportBPMNDiagramResult, ImportBPMNDiagramError>}
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*/
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export function importBpmnDiagram(diagram, definitions, bpmnDiagram) {
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var importer,
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eventBus,
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translate;
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var error,
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warnings = [];
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/**
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* Walk the diagram semantically, importing (=drawing)
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* all elements you encounter.
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*
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* @param {ModdleElement<Definitions>} definitions
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* @param {ModdleElement<BPMNDiagram>} bpmnDiagram
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*/
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function render(definitions, bpmnDiagram) {
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var visitor = {
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root: function(element, di) {
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return importer.add(element, di);
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},
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element: function(element, di, parentShape) {
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return importer.add(element, di, parentShape);
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},
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error: function(message, context) {
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warnings.push({ message: message, context: context });
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}
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};
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var walker = new BpmnTreeWalker(visitor, translate);
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// traverse BPMN 2.0 document model,
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// starting at definitions
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walker.handleDefinitions(definitions, bpmnDiagram);
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}
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return new Promise(function(resolve, reject) {
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try {
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importer = diagram.get('bpmnImporter');
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eventBus = diagram.get('eventBus');
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translate = diagram.get('translate');
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eventBus.fire('import.render.start', { definitions: definitions });
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render(definitions, bpmnDiagram);
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eventBus.fire('import.render.complete', {
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error: error,
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warnings: warnings
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});
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return resolve({ warnings: warnings });
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} catch (e) {
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e.warnings = warnings;
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return reject(e);
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}
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});
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}
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