chore(Viewer): type BPMNDiagram arg where possible

lib/Viewer.js

@@ -70,15 +70,14 @@ function ensureUnit(val) {
 
 
 /**
- *
  * Find BPMNDiagram in definitions by ID
  *
- * @param {ModdleElement} definitions
+ * @param {ModdleElement<Definitions>} definitions
  * @param {String} diagramId
  *
- * @return {Diagram|null}
+ * @return {ModdleElement<BPMNDiagram>|null}
  */
-function findDiagram(definitions, diagramId) {
+function findBPMNDiagram(definitions, diagramId) {
   if (!diagramId) {
     return null;
   }
@@ -174,14 +173,14 @@ inherits(Viewer, Diagram);
  * You can use these events to hook into the life-cycle.
  *
  * @param {String} xml the BPMN 2.0 xml
- * @param {String} [diagramId] id of the diagram to render (if not provided, the first one will be rendered)
+ * @param {ModdleElement<BPMNDiagram>|String} [bpmnDiagram] BPMN diagram or id of diagram to render (if not provided, the first one will be rendered)
  * @param {Function} [done] invoked with (err, warnings=[])
  */
-Viewer.prototype.importXML = function(xml, diagramId, done) {
+Viewer.prototype.importXML = function(xml, bpmnDiagram, done) {
 
-  if (isFunction(diagramId)) {
-    done = diagramId;
-    diagramId = null;
+  if (isFunction(bpmnDiagram)) {
+    done = bpmnDiagram;
+    bpmnDiagram = null;
   }
 
   // done is optional
@@ -215,7 +214,7 @@ Viewer.prototype.importXML = function(xml, diagramId, done) {
 
     self._setDefinitions(definitions);
 
-    self.open(diagramId, function(err, importWarnings) {
+    self.open(bpmnDiagram, function(err, importWarnings) {
       var allWarnings = [].concat(parseWarnings, importWarnings || []);
 
       self._emit('import.done', { error: err, warnings: allWarnings });
@@ -240,17 +239,18 @@ Viewer.prototype.importXML = function(xml, diagramId, done) {
  *
  * You can use these events to hook into the life-cycle.
  *
- * @param {String|Diagram} [diagram] id or the diagram to open
+ * @param {String|ModdleElement<BPMNDiagram>} [bpmnDiagramOrId] id or the diagram to open
  * @param {Function} [done] invoked with (err, warnings=[])
  */
-Viewer.prototype.open = function(diagram, done) {
+Viewer.prototype.open = function(bpmnDiagramOrId, done) {
 
-  if (isFunction(diagram)) {
-    done = diagram;
-    diagram = null;
+  if (isFunction(bpmnDiagramOrId)) {
+    done = bpmnDiagramOrId;
+    bpmnDiagramOrId = null;
   }
 
   var definitions = this._definitions;
+  var bpmnDiagram = bpmnDiagramOrId;
 
   // done is optional
   done = done || function() {};
@@ -259,24 +259,24 @@ Viewer.prototype.open = function(diagram, done) {
     return done(new Error('no XML imported'));
   }
 
-  if (typeof diagram === 'string') {
-    diagram = findDiagram(definitions, diagram);
+  if (typeof bpmnDiagramOrId === 'string') {
+    bpmnDiagram = findBPMNDiagram(definitions, bpmnDiagramOrId);
 
-    if (!diagram) {
-      return done(new Error('no diagram to display'));
+    if (!bpmnDiagram) {
+      return done(new Error('BPMNDiagram <' + bpmnDiagramOrId + '> not found'));
     }
   }
 
+  // clear existing rendered diagram
   // catch synchronous exceptions during #clear()
   try {
-    // clear existing rendered diagram
     this.clear();
   } catch (error) {
     return done(error);
   }
 
   // perform graphical import
-  return importBpmnDiagram(this, definitions, diagram, done);
+  return importBpmnDiagram(this, definitions, bpmnDiagram, done);
 };
 
 /**

lib/import/Importer.js

@@ -9,17 +9,17 @@ import {
  *
  * Errors and warnings are reported through the specified callback.
  *
- * @param  {Diagram} diagram
- * @param  {ModdleElement} definitions
- * @param  {ModdleElement} [selectedDiagram] the BPMNDiagram element selected to be rendered
+ * @param  {djs.Diagram} diagram
+ * @param  {ModdleElement<Definitions>} definitions
+ * @param  {ModdleElement<BPMNDiagram>} [bpmnDiagram] the diagram to be rendered
  * (if not provided, the first one will be rendered)
  * @param  {Function} done the callback, invoked with (err, [ warning ]) once the import is done
  */
-export function importBpmnDiagram(diagram, definitions, selectedDiagram, done) {
+export function importBpmnDiagram(diagram, definitions, bpmnDiagram, done) {
 
-  if (isFunction(selectedDiagram)) {
-    done = selectedDiagram;
-    selectedDiagram = null;
+  if (isFunction(bpmnDiagram)) {
+    done = bpmnDiagram;
+    bpmnDiagram = null;
   }
 
   var importer,
@@ -33,10 +33,10 @@ export function importBpmnDiagram(diagram, definitions, selectedDiagram, done) {
    * Walk the diagram semantically, importing (=drawing)
    * all elements you encounter.
    *
-   * @param {ModdleElement} definitions
-   * @param {ModdleElement} selectedDiagram
+   * @param {ModdleElement<Definitions>} definitions
+   * @param {ModdleElement<BPMNDiagram>} bpmnDiagram
    */
-  function render(definitions, selectedDiagram) {
+  function render(definitions, bpmnDiagram) {
 
     var visitor = {
 
@@ -57,7 +57,7 @@ export function importBpmnDiagram(diagram, definitions, selectedDiagram, done) {
 
     // traverse BPMN 2.0 document model,
     // starting at definitions
-    walker.handleDefinitions(definitions, selectedDiagram);
+    walker.handleDefinitions(definitions, bpmnDiagram);
   }
 
   try {
@@ -67,7 +67,7 @@ export function importBpmnDiagram(diagram, definitions, selectedDiagram, done) {
 
     eventBus.fire('import.render.start', { definitions: definitions });
 
-    render(definitions, selectedDiagram);
+    render(definitions, bpmnDiagram);
 
     eventBus.fire('import.render.complete', {
       error: error,