113 lines
2.5 KiB
JavaScript
113 lines
2.5 KiB
JavaScript
'use strict';
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var LabelUtil = require('../LabelUtil');
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var TextUtil = require('diagram-js/lib/util/Text');
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var hasExternalLabel = require('../../../util/LabelUtil').hasExternalLabel;
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var getBusinessObject = require('../../../util/ModelUtil').getBusinessObject;
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var NULL_DIMENSIONS = {
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width: 0,
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height: 0
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};
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/**
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* A handler that updates the text of a BPMN element.
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*/
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function UpdateLabelHandler(modeling) {
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var textUtil = new TextUtil();
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/**
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* Set the label and return the changed elements.
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*
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* Element parameter can be label itself or connection (i.e. sequence flow).
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*
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* @param {djs.model.Base} element
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* @param {String} text
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*/
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function setText(element, text) {
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// external label if present
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var label = element.label || element;
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var labelTarget = element.labelTarget || element;
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LabelUtil.setLabel(label, text, labelTarget !== label);
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return [ label, labelTarget ];
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}
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function execute(ctx) {
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ctx.oldLabel = LabelUtil.getLabel(ctx.element);
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return setText(ctx.element, ctx.newLabel);
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}
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function revert(ctx) {
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return setText(ctx.element, ctx.oldLabel);
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}
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function postExecute(ctx) {
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var element = ctx.element,
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label = element.label || element;
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// ignore internal labels
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if (!hasExternalLabel(element)) {
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return;
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}
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var text = getBusinessObject(label).name;
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if (!text) {
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return;
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}
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// get layouted text bounds and resize external
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// external label accordingly
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var newBounds = getLayoutedBounds(label, text, textUtil);
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modeling.resizeShape(label, newBounds, NULL_DIMENSIONS);
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}
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// API
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this.execute = execute;
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this.revert = revert;
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this.postExecute = postExecute;
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}
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UpdateLabelHandler.$inject = [ 'modeling' ];
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module.exports = UpdateLabelHandler;
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// TODO(nikku): repeating code (search for <getLayoutedBounds>)
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var EXTERNAL_LABEL_STYLE = {
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fontFamily: 'Arial, sans-serif',
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fontSize: '11px'
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};
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function getLayoutedBounds(bounds, text, textUtil) {
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var layoutedLabelDimensions = textUtil.getDimensions(text, {
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box: {
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width: 90,
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height: 30,
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x: bounds.width / 2 + bounds.x,
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y: bounds.height / 2 + bounds.y
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},
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style: EXTERNAL_LABEL_STYLE
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});
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// resize label shape to fit label text
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return {
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x: Math.round(bounds.x + bounds.width / 2 - layoutedLabelDimensions.width / 2),
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y: Math.round(bounds.y),
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width: Math.ceil(layoutedLabelDimensions.width),
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height: Math.ceil(layoutedLabelDimensions.height)
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};
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} |