dmn-js-drd/lib/features/outline/OutlineProvider.js

A decision requirements diagram view for dmn-js

import { assign } from 'min-dash';
import { attr as svgAttr, create as svgCreate } from 'tiny-svg';
import { is, isAny } from 'dmn-js-shared/lib/util/ModelUtil';
import { BUSINESS_KNOWLEDGE_MODEL_OUTLINE_PATH, KNOWLEDGE_SOURCE_OUTLINE_PATH, BUSINESS_KNOWLEDGE_MODEL_STANDARD_SIZE, KNOWLEDGE_SOURCE_STANDARD_SIZE, createPath } from './OutlineUtil';
const DEFAULT_OFFSET = 5;

/**
 * DMN-specific outline provider.
 *
 * @implements {BaseOutlineProvider}
 *
 * @param {Outline} outline
 * @param {Styles} styles
 */
export default function OutlineProvider(outline, styles) {
  this._styles = styles;
  outline.registerProvider(this);
}
OutlineProvider.$inject = ['outline', 'styles'];

/**
 * Returns outline for a given element.
 *
 * @param {Element} element
 *
 * @return {Outline}
 */
OutlineProvider.prototype.getOutline = function (element) {
  const OUTLINE_STYLE = this._styles.cls('djs-outline', ['no-fill']);
  var outline;
  if (is(element, 'dmn:InputData')) {
    outline = svgCreate('rect');
    svgAttr(outline, assign({
      x: -DEFAULT_OFFSET,
      y: -DEFAULT_OFFSET,
      rx: 27,
      width: element.width + DEFAULT_OFFSET * 2,
      height: element.height + DEFAULT_OFFSET * 2
    }, OUTLINE_STYLE));
  } else if (is(element, 'dmn:BusinessKnowledgeModel') && isStandardSize(element, 'dmn:BusinessKnowledgeModel')) {
    outline = createPath(BUSINESS_KNOWLEDGE_MODEL_OUTLINE_PATH, {
      x: -6,
      y: -6
    }, OUTLINE_STYLE);
  } else if (is(element, 'dmn:KnowledgeSource') && isStandardSize(element, 'dmn:KnowledgeSource')) {
    outline = createPath(KNOWLEDGE_SOURCE_OUTLINE_PATH, {
      x: -6,
      y: -1.5
    }, OUTLINE_STYLE);
  }
  return outline;
};

/**
 * Updates the outline for a given element.
 * Returns true if the update for the given element was handled by this provider.
 *
 * @param {Element} element
 * @param {Outline} outline
 * @returns {boolean}
 */
OutlineProvider.prototype.updateOutline = function (element) {
  if (isAny(element, ['dmn:InputData', 'dmn:BusinessKnowledgeModel', 'dmn:KnowledgeSource'])) {
    return true;
  }
  return false;
};

// helpers //////////

function isStandardSize(element, type) {
  var standardSize;
  if (type === 'dmn:BusinessKnowledgeModel') {
    standardSize = BUSINESS_KNOWLEDGE_MODEL_STANDARD_SIZE;
  } else if (type === 'dmn:KnowledgeSource') {
    standardSize = KNOWLEDGE_SOURCE_STANDARD_SIZE;
  }
  return element.width === standardSize.width && element.height === standardSize.height;
}
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