update

ebpm-process-modeler/public/js/bpmn-js/lib/features/label-editing/cmd/UpdateLabelHandler.js

@@ -0,0 +1,142 @@
+import {
+  setLabel,
+  getLabel
+} from '../LabelUtil';
+
+import {
+  getExternalLabelMid,
+  isLabelExternal,
+  hasExternalLabel,
+  isLabel
+} from '../../../util/LabelUtil';
+
+import {
+  is
+} from '../../../util/ModelUtil';
+
+var NULL_DIMENSIONS = {
+  width: 0,
+  height: 0
+};
+
+
+/**
+ * A handler that updates the text of a BPMN element.
+ */
+export default function UpdateLabelHandler(modeling, textRenderer) {
+
+  /**
+   * Set the label and return the changed elements.
+   *
+   * Element parameter can be label itself or connection (i.e. sequence flow).
+   *
+   * @param {djs.model.Base} element
+   * @param {String} text
+   */
+  function setText(element, text) {
+
+    // external label if present
+    var label = element.label || element;
+
+    var labelTarget = element.labelTarget || element;
+
+    setLabel(label, text, labelTarget !== label);
+
+    return [ label, labelTarget ];
+  }
+
+  function preExecute(ctx) {
+    var element = ctx.element,
+        businessObject = element.businessObject,
+        newLabel = ctx.newLabel;
+
+    if (!isLabel(element)
+        && isLabelExternal(element)
+        && !hasExternalLabel(element)
+        && !isEmptyText(newLabel)) {
+
+      // create label
+      var paddingTop = 7;
+
+      var labelCenter = getExternalLabelMid(element);
+
+      labelCenter = {
+        x: labelCenter.x,
+        y: labelCenter.y + paddingTop
+      };
+
+      modeling.createLabel(element, labelCenter, {
+        id: businessObject.id + '_label',
+        businessObject: businessObject
+      });
+    }
+  }
+
+  function execute(ctx) {
+    ctx.oldLabel = getLabel(ctx.element);
+    return setText(ctx.element, ctx.newLabel);
+  }
+
+  function revert(ctx) {
+    return setText(ctx.element, ctx.oldLabel);
+  }
+
+  function postExecute(ctx) {
+    var element = ctx.element,
+        label = element.label || element,
+        newLabel = ctx.newLabel,
+        newBounds = ctx.newBounds,
+        hints = ctx.hints || {};
+
+    if (isLabel(label) && isEmptyText(newLabel)) {
+
+      if (hints.removeShape !== false) {
+        modeling.removeShape(label, { unsetLabel: false });
+      }
+
+      return;
+    }
+
+    // ignore internal labels for elements except text annotations
+    if (!isLabelExternal(element) && !is(element, 'bpmn:TextAnnotation')) {
+      return;
+    }
+
+    var text = getLabel(label);
+
+    // don't resize without text
+    if (!text) {
+      return;
+    }
+
+    // resize element based on label _or_ pre-defined bounds
+    if (typeof newBounds === 'undefined') {
+      newBounds = textRenderer.getExternalLabelBounds(label, text);
+    }
+
+    // setting newBounds to false or _null_ will
+    // disable the postExecute resize operation
+    if (newBounds) {
+      modeling.resizeShape(label, newBounds, NULL_DIMENSIONS);
+    }
+  }
+
+  // API
+
+  this.preExecute = preExecute;
+  this.execute = execute;
+  this.revert = revert;
+  this.postExecute = postExecute;
+}
+
+UpdateLabelHandler.$inject = [
+  'modeling',
+  'textRenderer'
+];
+
+
+// helpers ///////////////////////
+
+function isEmptyText(label) {
+  return !label || !label.trim();
+}