bpmn-js/lib/features/label-editing/cmd/UpdateLabelHandler.js

123 lines
2.8 KiB
JavaScript

'use strict';
var LabelUtil = require('../LabelUtil');
var TextUtil = require('diagram-js/lib/util/Text');
var hasExternalLabel = require('../../../util/LabelUtil').hasExternalLabel;
var getBusinessObject = require('../../../util/ModelUtil').getBusinessObject,
is = require('../../../util/ModelUtil').is;
var NULL_DIMENSIONS = {
width: 0,
height: 0
};
/**
* A handler that updates the text of a BPMN element.
*/
function UpdateLabelHandler(modeling) {
var textUtil = new TextUtil();
/**
* 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;
LabelUtil.setLabel(label, text, labelTarget !== label);
return [ label, labelTarget ];
}
function execute(ctx) {
ctx.oldLabel = LabelUtil.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,
newBounds = ctx.newBounds;
// ignore internal labels for elements except text annotations
if (!hasExternalLabel(element) && !is(element, 'bpmn:TextAnnotation')) {
return;
}
var bo = getBusinessObject(label);
var text = bo.name || bo.text;
// don't resize without text
if (!text) {
return;
}
// resize element based on label _or_ pre-defined bounds
if (typeof newBounds === 'undefined') {
newBounds = getLayoutedBounds(label, text, textUtil);
}
// setting newBounds to false or _null_ will
// disable the postExecute resize operation
if (newBounds) {
modeling.resizeShape(label, newBounds, NULL_DIMENSIONS);
}
}
// API
this.execute = execute;
this.revert = revert;
this.postExecute = postExecute;
}
UpdateLabelHandler.$inject = [ 'modeling' ];
module.exports = UpdateLabelHandler;
// TODO(nikku): repeating code (search for <getLayoutedBounds>)
var EXTERNAL_LABEL_STYLE = {
fontFamily: 'Arial, sans-serif',
fontSize: '11px'
};
function getLayoutedBounds(bounds, text, textUtil) {
var layoutedLabelDimensions = textUtil.getDimensions(text, {
box: {
width: 90,
height: 30,
x: bounds.width / 2 + bounds.x,
y: bounds.height / 2 + bounds.y
},
style: EXTERNAL_LABEL_STYLE
});
// resize label shape to fit label text
return {
x: Math.round(bounds.x + bounds.width / 2 - layoutedLabelDimensions.width / 2),
y: Math.round(bounds.y),
width: Math.ceil(layoutedLabelDimensions.width),
height: Math.ceil(layoutedLabelDimensions.height)
};
}