bpmn-js/lib/features/modeling/LabelSupport.js

120 lines
2.7 KiB
JavaScript

'use strict';
var assign = require('lodash/object/assign'),
forEach = require('lodash/collection/forEach');
var LabelUtil = require('../../util/Label');
var hasExternalLabel = LabelUtil.hasExternalLabel,
getExternalLabelMid = LabelUtil.getExternalLabelMid;
function LabelSupport(eventBus, modeling, bpmnFactory) {
// create external labels on shape creation
eventBus.on([
'commandStack.shape.create.postExecute',
'commandStack.connection.create.postExecute'
], function(e) {
var context = e.context;
var element = context.shape || context.connection,
businessObject = element.businessObject;
var position;
if (hasExternalLabel(businessObject)) {
position = getExternalLabelMid(element);
modeling.createLabel(element, position, {
id: businessObject.id + '_label',
businessObject: businessObject
});
}
});
// indicate label is dragged during move
// we need to add labels to the list of selected
// shapes before the visuals get drawn.
//
// Hence this awesome magic number.
//
eventBus.on('shape.move.start', function(e) {
var context = e.context,
shapes = context.shapes;
var labels = [];
forEach(shapes, function(element) {
var label = element.label;
if (label && !label.hidden && context.shapes.indexOf(label) === -1) {
labels.push(label);
}
});
forEach(labels, function(label) {
shapes.push(label);
});
});
// move labels with shapes
eventBus.on([
'commandStack.shapes.move.postExecute'
], function(e) {
var context = e.context,
closure = context.closure,
enclosedElements = closure.enclosedElements;
// ensure we move all labels with their respective elements
// if they have not been moved already
forEach(enclosedElements, function(e) {
if (e.label && !enclosedElements[e.label.id]) {
modeling.moveShape(e.label, context.delta, e.parent);
}
});
});
// update di information on label movement and creation
eventBus.on([
'commandStack.label.create.executed',
'commandStack.shape.moved.executed'
], function(e) {
var element = e.context.shape,
businessObject = element.businessObject,
di = businessObject.di;
// we want to trigger on real labels only
if (!element.labelTarget) {
return;
}
if (!di.label) {
di.label = bpmnFactory.create('bpmndi:BPMNLabel', {
bounds: bpmnFactory.create('dc:Bounds')
});
}
assign(di.label.bounds, {
x: element.x,
y: element.y,
width: element.width,
height: element.height
});
});
}
LabelSupport.$inject = [ 'eventBus', 'modeling', 'bpmnFactory' ];
module.exports = LabelSupport;