bpmn-js/lib/features/modeling/behavior/DeleteLaneBehavior.js

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'use strict';
var inherits = require('inherits');
var CommandInterceptor = require('diagram-js/lib/command/CommandInterceptor');
var is = require('../../../util/ModelUtil').is;
var getChildLanes = require('../util/LaneUtil').getChildLanes;
var eachElement = require('diagram-js/lib/util/Elements').eachElement;
var LOW_PRIORITY = 500;
/**
* BPMN specific delete lane behavior
*/
function DeleteLaneBehavior(eventBus, modeling, spaceTool) {
CommandInterceptor.call(this, eventBus);
function compensateLaneDelete(shape, oldParent) {
var siblings = getChildLanes(oldParent);
var topAffected = [];
var bottomAffected = [];
eachElement(siblings, function(element) {
if (element.y > shape.y) {
bottomAffected.push(element);
} else {
topAffected.push(element);
}
return element.children;
});
if (!siblings.length) {
return;
}
var offset;
if (bottomAffected.length && topAffected.length) {
offset = shape.height / 2;
} else {
offset = shape.height;
}
var topAdjustments,
bottomAdjustments;
if (topAffected.length) {
topAdjustments = spaceTool.calculateAdjustments(
topAffected, 'y', offset, shape.y - 10);
spaceTool.makeSpace(
topAdjustments.movingShapes,
topAdjustments.resizingShapes,
{ x: 0, y: offset }, 's');
}
if (bottomAffected.length) {
bottomAdjustments = spaceTool.calculateAdjustments(
bottomAffected, 'y', -offset, shape.y + shape.height + 10);
spaceTool.makeSpace(
bottomAdjustments.movingShapes,
bottomAdjustments.resizingShapes,
{ x: 0, y: -offset }, 'n');
}
}
/**
* Adjust sizes of other lanes after lane deletion
*/
this.postExecuted('shape.delete', LOW_PRIORITY, function(event) {
var context = event.context,
hints = context.hints,
shape = context.shape,
oldParent = context.oldParent;
// only compensate lane deletes
if (!is(shape, 'bpmn:Lane')) {
return;
}
// compensate root deletes only
if (hints && hints.nested) {
return;
}
compensateLaneDelete(shape, oldParent);
});
}
DeleteLaneBehavior.$inject = [ 'eventBus', 'modeling', 'spaceTool' ];
inherits(DeleteLaneBehavior, CommandInterceptor);
module.exports = DeleteLaneBehavior;