# all files / Github/bpmn-js/lib/draw/ BpmnRenderUtil.js

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     import {
      every,
      some
    } from 'min-dash';

    import {
      componentsToPath
    } from 'diagram-js/lib/util/RenderUtil';

    // element utils //////////////////////

    /**
     * Checks if eventDefinition of the given element matches with semantic type.
     *
     * @return {boolean} true if element is of the given semantic type
     */
    export function isTypedEvent(event, eventDefinitionType, filter) {

      function matches(definition, filter) {
        return every(filter, function(val, key) {

          // we want a == conversion here, to be able to catch
          // undefined == false and friends
          /* jshint -W116 */
          return definition[key] == val;
        });
      }

      return some(event.eventDefinitions, function(definition) {
        return definition.$type === eventDefinitionType && matches(event, filter);
      });
    }

    export function isThrowEvent(event) {
      return (event.$type === 'bpmn:IntermediateThrowEvent') || (event.$type === 'bpmn:EndEvent');
    }

    export function isCollection(element) {
      var dataObject = element.dataObjectRef;

      return element.isCollection || (dataObject && dataObject.isCollection);
    }

    export function getDi(element) {
      return element.businessObject.di;
    }

    export function getSemantic(element) {
      return element.businessObject;
    }

    // color access //////////////////////

    export function getFillColor(element, defaultColor) {
      return getDi(element).get('bioc:fill') || defaultColor || 'white';
    }

    export function getStrokeColor(element, defaultColor) {
      return getDi(element).get('bioc:stroke') || defaultColor || 'black';
    }

    // cropping path customizations //////////////////////

    export function getCirclePath(shape) {

      var cx = shape.x + shape.width / 2,
          cy = shape.y + shape.height / 2,
          radius = shape.width / 2;

      var circlePath = [
        ['M', cx, cy],
        ['m', 0, -radius],
        ['a', radius, radius, 0, 1, 1, 0, 2 * radius],
        ['a', radius, radius, 0, 1, 1, 0, -2 * radius],
        ['z']
      ];

      return componentsToPath(circlePath);
    }

    export function getRoundRectPath(shape, borderRadius) {

      var x = shape.x,
          y = shape.y,
          width = shape.width,
          height = shape.height;

      var roundRectPath = [
        ['M', x + borderRadius, y],
        ['l', width - borderRadius * 2, 0],
        ['a', borderRadius, borderRadius, 0, 0, 1, borderRadius, borderRadius],
        ['l', 0, height - borderRadius * 2],
        ['a', borderRadius, borderRadius, 0, 0, 1, -borderRadius, borderRadius],
        ['l', borderRadius * 2 - width, 0],
        ['a', borderRadius, borderRadius, 0, 0, 1, -borderRadius, -borderRadius],
        ['l', 0, borderRadius * 2 - height],
        ['a', borderRadius, borderRadius, 0, 0, 1, borderRadius, -borderRadius],
        ['z']
      ];

      return componentsToPath(roundRectPath);
    }

    export function getDiamondPath(shape) {

      var width = shape.width,
          height = shape.height,
          x = shape.x,
          y = shape.y,
          halfWidth = width / 2,
          halfHeight = height / 2;

      var diamondPath = [
        ['M', x + halfWidth, y],
        ['l', halfWidth, halfHeight],
        ['l', -halfWidth, halfHeight],
        ['l', -halfWidth, -halfHeight],
        ['z']
      ];

      return componentsToPath(diamondPath);
    }

    export function getRectPath(shape) {
      var x = shape.x,
          y = shape.y,
          width = shape.width,
          height = shape.height;

      var rectPath = [
        ['M', x, y],
        ['l', width, 0],
        ['l', 0, height],
        ['l', -width, 0],
        ['z']
      ];

      return componentsToPath(rectPath);
    }