/
ElementColors.js
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/
ElementColors.js
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import {
getDi,
isAny
} from 'bpmn-js/lib/util/ModelUtil';
import {
TOGGLE_MODE_EVENT
} from '../../util/EventHelper';
const VERY_HIGH_PRIORITY = 50000;
/**
* @typedef Colors
* @prop {string} fill
* @prop {string} stroke
*/
/**
* @typedef CustomColors
* @prop {string} fill
* @prop {string} stroke
* @prop {number} priority
*/
export default function ElementColors(elementRegistry, eventBus, graphicsFactory) {
this._elementRegistry = elementRegistry;
this._eventBus = eventBus;
this._graphicsFactory = graphicsFactory;
this._originalColors = {};
this._customColors = {};
eventBus.on(TOGGLE_MODE_EVENT, VERY_HIGH_PRIORITY, event => {
const active = event.active;
if (active) {
this._saveOriginalColors();
} else {
this._applyOriginalColors();
this._originalColors = {};
this._customColors = {};
}
});
eventBus.on('saveXML.start', VERY_HIGH_PRIORITY, () => {
this._applyOriginalColors();
eventBus.once('saveXML.done', () => this._applyCustomColors());
});
}
ElementColors.$inject = [
'elementRegistry',
'eventBus',
'graphicsFactory'
];
/**
* Add colors to an element. Element will be redrawn with highest priority
* colors.
*
* @param {Object} element
* @param {string} id
* @param {Colors} colors
* @param {number} [priority=1000]
*/
ElementColors.prototype.add = function(element, id, colors, priority = 1000) {
let elementColors = this._customColors[ element.id ];
if (!elementColors) {
elementColors = this._customColors[ element.id ] = {};
}
elementColors[ id ] = {
...colors,
priority
};
this._applyHighestPriorityColor(element);
};
/**
* Remove colors from an element. Element will be redrawn with highest priority
* colors.
*
* @param {Object} element
* @param {string} id
*/
ElementColors.prototype.remove = function(element, id) {
const elementColors = this._customColors[ element.id ];
if (elementColors) {
delete elementColors[ id ];
if (!Object.keys(elementColors)) {
delete this._customColors[ element.id ];
}
}
this._applyHighestPriorityColor(element);
};
ElementColors.prototype._get = function(element) {
const di = getDi(element);
if (!di) {
return undefined;
}
// reading in accordance with bpmn-js@8.7+,
// BPMN-in-Color specification
if (isLabel(element)) {
return {
stroke: di.label && di.label.get('color')
};
} else if (isAny(di, [ 'bpmndi:BPMNEdge', 'bpmndi:BPMNShape' ])) {
return {
fill: di.get('background-color'),
stroke: di.get('border-color')
};
}
};
ElementColors.prototype._set = function(element, colors = {}) {
const {
fill,
stroke
} = colors;
const di = getDi(element);
if (!di) {
return;
}
// writing in accordance with bpmn-js@8.7+,
// BPMN-in-Color specification
if (isLabel(element)) {
di.label && di.label.set('color', stroke);
} else if (isAny(di, [ 'bpmndi:BPMNEdge', 'bpmndi:BPMNShape' ])) {
di.set('background-color', fill);
di.set('border-color', stroke);
}
this._forceRedraw(element);
};
ElementColors.prototype._saveOriginalColors = function() {
this._originalColors = {};
this._elementRegistry.forEach(element => {
this._originalColors[ element.id ] = this._get(element);
});
};
ElementColors.prototype._applyOriginalColors = function() {
this._elementRegistry.forEach(element => {
const colors = this._originalColors[ element.id ];
if (colors) {
this._set(element, colors);
}
});
};
ElementColors.prototype._applyCustomColors = function() {
this._elementRegistry.forEach(element => {
const elementColors = this._customColors[ element.id ];
if (elementColors) {
this._set(element, getColorsWithHighestPriority(elementColors));
}
});
};
ElementColors.prototype._applyHighestPriorityColor = function(element) {
const elementColors = this._customColors[ element.id ];
if (!elementColors) {
this._set(element, this._originalColors[ element.id ]);
return;
}
this._set(element, getColorsWithHighestPriority(elementColors));
};
ElementColors.prototype._forceRedraw = function(element) {
const gfx = this._elementRegistry.getGraphics(element);
const type = element.waypoints ? 'connection' : 'shape';
this._graphicsFactory.update(type, element, gfx);
};
// helpers /////////////////
function isLabel(element) {
return 'labelTarget' in element;
}
/**
* Get colors with highest priority.
*
* @param {Map<string, CustomColors>|undefined} colors
*
* @returns {Colors|undefined}
*/
function getColorsWithHighestPriority(colors = {}) {
const colorsWithHighestPriority = Object.values(colors).reduce((colorsWithHighestPriority, colors) => {
const { priority = 1000 } = colors;
if (!colorsWithHighestPriority || priority > colorsWithHighestPriority.priority) {
return colors;
}
return colorsWithHighestPriority;
}, undefined);
if (colorsWithHighestPriority) {
const { priority, ...fillAndStroke } = colorsWithHighestPriority;
return fillAndStroke;
}
}