drawdown-svg-render/lib/helpers/shape.js

Svg renderer for drawdown diagrams

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.shapeGenerator = shapeGenerator;
exports.auto = auto;
exports.circle = circle;
exports.rectangle = rectangle;
exports.diamond = diamond;

var _Renderer = require('./Renderer');

function shapeGenerator(style) {
  switch (style) {
    case 'AUTO':
      return auto;
    case 'RECTANGLE':
      return rectangle;
    case 'CIRCLE':
      return circle;
    case 'DIAMOND':
      return diamond;
    default:
      throw 'Unknown node style "' + style + '"';
  }
}

function auto(d) {
  var l = d.layout;
  switch (d.blockType.toUpperCase()) {
    case 'PROCESS':
      return rectanglePath(0, 0, l.w, l.h);
    case 'NODE':
      return circlePath(0, 0, Math.sqrt(l.w * l.w + l.h * l.h) / 2);
    case 'CONDITION':
      return diamondPath(0, 0, l.w, l.h);
    case 'TIMELINE':
      return function () {
        var foo = 0;
        return rectanglePath(0, 0, l.w, l.h);
      }();
  }
}

function circle(d) {
  var l = d.layout;
  return circlePath(0, 0, Math.sqrt(l.w * l.w + l.h * l.h) / 2);
}

function rectangle(d) {
  var l = d.layout;
  return rectanglePath(0, 0, l.w, l.h);
}

function diamond(d) {
  var l = d.layout;
  return diamondPath(0, 0, l.w, l.h);
}

// PATHS

function rectanglePath(x, y, w, h) {
  return 'M' + (x - w / 2 - _Renderer.PADDING) + ' ' + (y - h / 2 - _Renderer.PADDING) + 'h' + (w + 2 * _Renderer.PADDING) + 'v' + (h + 2 * _Renderer.PADDING) + 'h' + (-w - 2 * _Renderer.PADDING) + 'Z';
}

function diamondPath(x, y, w, h) {
  var ww = w + h + _Renderer.PADDING;
  return 'M' + 0 + ' ' + (y - ww / 2) + '\n          L' + (x + ww / 2) + ' 0\n          L0 ' + (y + ww / 2) + '\n          L' + (x - ww / 2) + ' 0\n          Z';
}

function circlePath(x, y, r) {
  return 'M' + (x - r) + ' ' + y + '\n          a ' + r + ' ' + r + ' 0 1 0 ' + r * 2 + ' 0\n          a ' + r + ' ' + r + ' 0 1 0 ' + -r * 2 + ' 0';
}
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