basicprimitives/src/tasks/renders/DrawBackgroundAnnotationTask.js

Basic Primitives Diagrams for JavaScript - data visualization components library that implements organizational chart and multi-parent dependency diagrams, contains implementations of JavaScript Controls and PDF rendering plugins.

import { Layers } from '../../enums';
import MergedRectangles from '../../graphics/shapes/MergedRectangles';
import BackgroundAnnotationConfig from '../../configs/BackgroundAnnotationConfig';
import Rect from '../../graphics/structs/Rect';

export default function DrawBackgroundAnnotationTask(getGraphics, createTransformTask, applyLayoutChangesTask,
  backgroundAnnotationOptionTask, navigationFamilyTask, alignDiagramTask) {
  var _graphics,
    _positions,
    _transform;

  function process() {
    var annotations = backgroundAnnotationOptionTask.getAnnotations(),
      navigationFamily;

    _graphics = getGraphics();
    _graphics.reset("placeholder", Layers.BackgroundAnnotation);

    if (annotations.length > 0) {
      _positions = alignDiagramTask.getItemsPositions();
      _transform = createTransformTask.getTransform();

      navigationFamily = navigationFamilyTask.getLogicalFamily();

      drawAnnotations(annotations, _positions, navigationFamily);
    }

    return false;
  }

  function drawAnnotations(annotations, positions, navigationFamily) {
    var panel,
      index, len,
      index2, len2,
      index3, len3,
      shape,
      defaultConfig,
      rects, rect,
      itemsHash, item,
      properties, property,
      annotationConfig, treeItemPosition;

    for (index = 0, len = annotations.length; index < len; index += 1) {
      annotationConfig = annotations[index];

      if (annotationConfig.items != null && annotationConfig.items.length > 0) {
        shape = new MergedRectangles(_graphics);
        shape.transform = _transform;
        defaultConfig = new BackgroundAnnotationConfig();
        properties = ["opacity", "lineWidth", "borderColor", "fillColor", "lineType"];
        for (index3 = 0, len3 = properties.length; index3 < len3; index3 += 1) {
          property = properties[index3];
          shape[property] = annotationConfig.hasOwnProperty(property) ? annotationConfig[property] : defaultConfig[property];
        }
        panel = _graphics.activate("placeholder", Layers.BackgroundAnnotation);

        rects = [];
        itemsHash = {};
        for (index2 = 0, len2 = annotationConfig.items.length; index2 < len2; index2 += 1) {
          item = annotationConfig.items[index2];
          treeItemPosition = alignDiagramTask.getItemPosition(item);
          if (treeItemPosition != null) {
            itemsHash[item] = true;
            rect = new Rect(treeItemPosition.actualPosition);
            rect.offset(annotationConfig.offset);
            rects.push(rect);

            if (annotationConfig.includeChildren) {
              navigationFamily.loopChildren(this, item, function (childItemId, childItem) {
                if (!itemsHash[childItemId]) {
                  itemsHash[childItemId] = true;
                  treeItemPosition = alignDiagramTask.getItemPosition(childItemId);
                  if (treeItemPosition != null) {
                    rect = new Rect(treeItemPosition.actualPosition);
                    rect.offset(annotationConfig.offset);
                    rects.push(rect);
                  }
                }
              }); //ignore jslint
            }
          }
        }
        shape.draw(rects);
      }
    }
  }

  return {
    process: process
  };
};