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

143 lines
3.5 KiB
JavaScript

import inherits from 'inherits';
import CommandInterceptor from 'diagram-js/lib/command/CommandInterceptor';
import {
getBusinessObject,
is
} from '../../../util/ModelUtil';
import {
computeChildrenBBox
} from 'diagram-js/lib/features/resize/ResizeUtil';
var LOW_PRIORITY = 500;
export default function ToggleElementCollapseBehaviour(
eventBus, elementFactory, modeling,
resize) {
CommandInterceptor.call(this, eventBus);
function hideEmptyLables(children) {
if (children.length) {
children.forEach(function(child) {
if (child.type === 'label' && !child.businessObject.name) {
child.hidden = true;
}
});
}
}
function expandedBounds(shape, defaultSize) {
var children = shape.children,
newBounds = defaultSize,
visibleElements,
visibleBBox;
visibleElements = filterVisible(children).concat([ shape ]);
visibleBBox = computeChildrenBBox(visibleElements);
if (visibleBBox) {
// center to visibleBBox with max(defaultSize, childrenBounds)
newBounds.width = Math.max(visibleBBox.width, newBounds.width);
newBounds.height = Math.max(visibleBBox.height, newBounds.height);
newBounds.x = visibleBBox.x + (visibleBBox.width - newBounds.width) / 2;
newBounds.y = visibleBBox.y + (visibleBBox.height - newBounds.height) / 2;
} else {
// center to collapsed shape with defaultSize
newBounds.x = shape.x + (shape.width - newBounds.width) / 2;
newBounds.y = shape.y + (shape.height - newBounds.height) / 2;
}
return newBounds;
}
function collapsedBounds(shape, defaultSize) {
return {
x: shape.x + (shape.width - defaultSize.width) / 2,
y: shape.y + (shape.height - defaultSize.height) / 2,
width: defaultSize.width,
height: defaultSize.height
};
}
this.executed([ 'shape.toggleCollapse' ], LOW_PRIORITY, function(e) {
var context = e.context,
shape = context.shape;
if (!is(shape, 'bpmn:SubProcess')) {
return;
}
if (!shape.collapsed) {
// all children got made visible through djs, hide empty labels
hideEmptyLables(shape.children);
// remove collapsed marker
getBusinessObject(shape).di.isExpanded = true;
} else {
// place collapsed marker
getBusinessObject(shape).di.isExpanded = false;
}
});
this.reverted([ 'shape.toggleCollapse' ], LOW_PRIORITY, function(e) {
var context = e.context;
var shape = context.shape;
// revert removing/placing collapsed marker
if (!shape.collapsed) {
getBusinessObject(shape).di.isExpanded = true;
} else {
getBusinessObject(shape).di.isExpanded = false;
}
});
this.postExecuted([ 'shape.toggleCollapse' ], LOW_PRIORITY, function(e) {
var shape = e.context.shape,
defaultSize = elementFactory._getDefaultSize(shape),
newBounds;
if (shape.collapsed) {
// resize to default size of collapsed shapes
newBounds = collapsedBounds(shape, defaultSize);
} else {
// resize to bounds of max(visible children, defaultSize)
newBounds = expandedBounds(shape, defaultSize);
}
modeling.resizeShape(shape, newBounds);
});
}
inherits(ToggleElementCollapseBehaviour, CommandInterceptor);
ToggleElementCollapseBehaviour.$inject = [
'eventBus',
'elementFactory',
'modeling'
];
// helpers //////////////////////
function filterVisible(elements) {
return elements.filter(function(e) {
return !e.hidden;
});
}