1 | const { cagColor, cssStyle, css2cag } = require('./helpers')
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2 | const { pxPmm } = require('./constants')
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3 |
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4 | const svgCore = function (obj, element) {
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5 | if ('ID' in element) { obj.id = element.ID }
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6 | if ('position' in element) { obj.position = element.position }
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7 | }
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8 |
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9 | const svgPresentation = function (obj, element) {
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10 |
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11 | if ('DISPLAY' in element) { obj.visible = element.DISPLAY }
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12 |
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13 | if ('COLOR' in element) { obj.fill = cagColor(element.COLOR); obj.stroke = obj.fill }
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14 | if ('OPACITY' in element) { obj.opacity = element.OPACITY }
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15 | if ('FILL' in element) {
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16 | obj.fill = cagColor(element.FILL)
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17 | } else {
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18 | const s = cssStyle(element, 'fill')
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19 | if (s) {
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20 | obj.fill = cagColor(s)
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21 | }
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22 | }
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23 | if ('FILL-OPACITY' in element) { obj.opacity = element['FILL-OPACITY'] }
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24 |
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25 | if ('STROKE-WIDTH' in element) {
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26 | obj.strokeWidth = element['STROKE-WIDTH']
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27 | } else {
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28 | const sw = cssStyle(element, 'stroke-width')
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29 | if (sw) {
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30 | obj.strokeWidth = sw
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31 | }
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32 | }
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33 | if ('STROKE' in element) {
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34 | obj.stroke = cagColor(element.STROKE)
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35 | } else {
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36 | const s = cssStyle(element, 'stroke')
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37 | if (s) {
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38 | obj.stroke = cagColor(s)
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39 | }
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40 | }
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41 | if ('STROKE-OPACITY' in element) { obj.strokeOpacity = element['STROKE-OPACITY'] }
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42 | }
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43 |
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44 | const svgTransforms = function (cag, element) {
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45 | let list = null
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46 | if ('TRANSFORM' in element) {
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47 | list = element.TRANSFORM
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48 | } else {
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49 | const s = cssStyle(element, 'transform')
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50 | if (s) { list = s }
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51 | }
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52 | if (list !== null) {
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53 | cag.transforms = []
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54 | const exp = new RegExp('\\w+\\(.+\\)', 'i')
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55 | let v = exp.exec(list)
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56 | while (v !== null) {
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57 | const s = exp.lastIndex
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58 | const e = list.indexOf(')') + 1
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59 | let t = list.slice(s, e)
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60 | t = t.trim()
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61 |
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62 |
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63 | const n = t.slice(0, t.indexOf('('))
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64 | let a = t.slice(t.indexOf('(') + 1, t.indexOf(')')).trim()
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65 | if (a.indexOf(',') > 0) { a = a.split(',') } else { a = a.split(' ') }
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66 | let o
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67 | switch (n) {
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68 | case 'translate':
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69 | if (a.length === 1) a.push(0)
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70 | o = { translate: [a[0], a[1]] }
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71 | cag.transforms.push(o)
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72 | break
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73 | case 'scale':
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74 | if (a.length === 1) a.push(a[0])
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75 | o = { scale: [a[0], a[1]] }
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76 | cag.transforms.push(o)
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77 | break
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78 | case 'rotate':
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79 | o = { rotate: a }
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80 | cag.transforms.push(o)
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81 | break
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82 |
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83 |
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84 |
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85 | default:
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86 | break
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87 | }
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88 |
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89 | list = list.slice(e, list.length)
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90 | v = exp.exec(list)
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91 | }
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92 | }
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93 | }
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94 |
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95 | const svgSvg = function (element, { customPxPmm }) {
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96 |
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97 | const obj = { type: 'svg', x: 0, y: 0, width: '100%', height: '100%', strokeWidth: '1' }
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98 |
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99 |
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100 | obj.unitsPmm = [pxPmm, pxPmm]
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101 |
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102 | if ('PXPMM' in element) {
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103 |
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104 | obj.pxPmm = element.PXPMM
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105 | obj.unitsPmm = [obj.pxPmm, obj.pxPmm]
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106 | }
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107 | if ('WIDTH' in element) { obj.width = element.WIDTH }
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108 | if ('HEIGHT' in element) { obj.height = element.HEIGHT }
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109 | if ('VIEWBOX' in element) {
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110 | const list = element.VIEWBOX.trim()
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111 | const exp = new RegExp('([\\d\\.\\-]+)[\\s,]+([\\d\\.\\-]+)[\\s,]+([\\d\\.\\-]+)[\\s,]+([\\d\\.\\-]+)', 'i')
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112 | const v = exp.exec(list)
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113 | if (v !== null) {
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114 | obj.viewX = parseFloat(v[1])
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115 | obj.viewY = parseFloat(v[2])
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116 | obj.viewW = parseFloat(v[3])
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117 | obj.viewH = parseFloat(v[4])
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118 | }
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119 |
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120 | if (obj.width.indexOf('%') < 0) {
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121 |
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122 | let s = css2cag(obj.width, customPxPmm)
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123 | s = obj.viewW / s
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124 |
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125 |
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126 | obj.unitsPmm[0] = s
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127 | } else {
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128 |
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129 | const u = obj.unitsPmm[0] * (parseFloat(obj.width) / 100.0)
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130 | obj.unitsPmm[0] = u
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131 | }
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132 | if (obj.height.indexOf('%') < 0) {
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133 |
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134 | let s = css2cag(obj.height, pxPmm)
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135 | s = obj.viewH / s
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136 |
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137 |
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138 | obj.unitsPmm[1] = s
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139 | } else {
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140 |
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141 | const u = obj.unitsPmm[1] * (parseFloat(obj.height) / 100.0)
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142 | obj.unitsPmm[1] = u
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143 | }
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144 | } else {
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145 | obj.viewX = 0
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146 | obj.viewY = 0
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147 | obj.viewW = 1920 / obj.unitsPmm[0]
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148 | obj.viewH = 1080 / obj.unitsPmm[1]
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149 | }
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150 | obj.viewP = Math.sqrt((obj.viewW * obj.viewW) + (obj.viewH * obj.viewH)) / Math.SQRT2
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151 |
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152 |
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153 | svgCore(obj, element)
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154 |
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155 | svgPresentation(obj, element)
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156 |
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157 | obj.objects = []
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158 | return obj
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159 | }
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160 |
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161 | const svgEllipse = function (element) {
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162 | const obj = { type: 'ellipse', cx: '0', cy: '0', rx: '0', ry: '0' }
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163 | if ('CX' in element) { obj.cx = element.CX }
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164 | if ('CY' in element) { obj.cy = element.CY }
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165 | if ('RX' in element) { obj.rx = element.RX }
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166 | if ('RY' in element) { obj.ry = element.RY }
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167 |
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168 | svgTransforms(obj, element)
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169 |
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170 | svgCore(obj, element)
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171 |
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172 | svgPresentation(obj, element)
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173 | return obj
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174 | }
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175 |
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176 | const svgLine = function (element) {
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177 | const obj = { type: 'line', x1: '0', y1: '0', x2: '0', y2: '0' }
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178 | if ('X1' in element) { obj.x1 = element.X1 }
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179 | if ('Y1' in element) { obj.y1 = element.Y1 }
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180 | if ('X2' in element) { obj.x2 = element.X2 }
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181 | if ('Y2' in element) { obj.y2 = element.Y2 }
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182 |
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183 | svgTransforms(obj, element)
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184 |
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185 | svgCore(obj, element)
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186 |
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187 | svgPresentation(obj, element)
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188 | return obj
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189 | }
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190 |
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191 | const svgListOfPoints = function (list) {
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192 | const points = []
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193 | const exp = new RegExp('([\\d\\-\\+\\.]+)[\\s,]+([\\d\\-\\+\\.]+)[\\s,]*', 'i')
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194 | list = list.trim()
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195 | let v = exp.exec(list)
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196 | while (v !== null) {
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197 | let point = v[0]
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198 | const next = exp.lastIndex + point.length
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199 | point = { x: v[1], y: v[2] }
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200 | points.push(point)
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201 | list = list.slice(next, list.length)
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202 | v = exp.exec(list)
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203 | }
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204 | return points
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205 | }
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206 |
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207 | const svgPolyline = function (element) {
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208 | const obj = { type: 'polyline' }
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209 |
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210 | svgTransforms(obj, element)
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211 |
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212 | svgCore(obj, element)
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213 |
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214 | svgPresentation(obj, element)
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215 |
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216 | if ('POINTS' in element) {
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217 | obj.points = svgListOfPoints(element.POINTS)
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218 | }
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219 | return obj
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220 | }
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221 |
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222 | const svgPolygon = function (element) {
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223 | const obj = { type: 'polygon' }
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224 |
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225 | svgTransforms(obj, element)
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226 |
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227 | svgCore(obj, element)
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228 |
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229 | svgPresentation(obj, element)
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230 |
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231 | if ('POINTS' in element) {
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232 | obj.points = svgListOfPoints(element.POINTS)
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233 | }
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234 | return obj
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235 | }
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236 |
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237 | const svgRect = function (element) {
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238 | const obj = { type: 'rect', x: '0', y: '0', rx: '0', ry: '0', width: '0', height: '0' }
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239 |
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240 | if ('X' in element) { obj.x = element.X }
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241 | if ('Y' in element) { obj.y = element.Y }
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242 | if ('RX' in element) {
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243 | obj.rx = element.RX
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244 | if (!('RY' in element)) { obj.ry = obj.rx }
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245 | }
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246 | if ('RY' in element) {
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247 | obj.ry = element.RY
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248 | if (!('RX' in element)) { obj.rx = obj.ry }
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249 | }
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250 | if (obj.rx !== obj.ry) {
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251 | console.log('Warning: Unsupported RECT with RX and RY radius')
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252 | }
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253 | if ('WIDTH' in element) { obj.width = element.WIDTH }
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254 | if ('HEIGHT' in element) { obj.height = element.HEIGHT }
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255 |
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256 | svgTransforms(obj, element)
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257 |
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258 | svgCore(obj, element)
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259 |
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260 | svgPresentation(obj, element)
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261 | return obj
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262 | }
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263 |
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264 | const svgCircle = function (element) {
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265 | const obj = { type: 'circle', x: '0', y: '0', radius: '0' }
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266 |
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267 | if ('CX' in element) { obj.x = element.CX }
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268 | if ('CY' in element) { obj.y = element.CY }
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269 | if ('R' in element) { obj.radius = element.R }
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270 |
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271 | svgTransforms(obj, element)
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272 |
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273 | svgCore(obj, element)
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274 |
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275 | svgPresentation(obj, element)
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276 | return obj
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277 | }
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278 |
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279 | const svgGroup = function (element) {
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280 | const obj = { type: 'group' }
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281 |
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282 | svgTransforms(obj, element)
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283 |
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284 | svgCore(obj, element)
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285 |
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286 | svgPresentation(obj, element)
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287 |
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288 | if ('X' in element || 'Y' in element) {
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289 | let x = '0'
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290 | let y = '0'
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291 | if ('X' in element) x = element.X
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292 | if ('Y' in element) y = element.Y
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293 | if (!('transforms' in obj)) obj.transforms = []
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294 | const o = { translate: [x, y] }
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295 | obj.transforms.push(o)
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296 | }
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297 |
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298 | obj.objects = []
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299 | return obj
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300 | }
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301 |
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302 |
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303 |
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304 |
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305 | const svgPath = function (element) {
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306 | const obj = { type: 'path' }
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307 |
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308 | svgTransforms(obj, element)
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309 |
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310 | svgCore(obj, element)
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311 |
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312 | svgPresentation(obj, element)
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313 |
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314 | obj.commands = []
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315 | if ('D' in element) {
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316 | let co = null
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317 | let bf = ''
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318 |
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319 | let i = 0
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320 | const l = element.D.length
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321 | while (i < l) {
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322 | const c = element.D[i]
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323 | switch (c) {
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324 |
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325 |
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326 | case '-':
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327 | if (bf.length > 0) {
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328 | co.p.push(bf)
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329 | bf = ''
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330 | }
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331 | bf += c
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332 | break
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333 | case '.':
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334 | if (bf.length > 0) {
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335 | if (bf.indexOf('.') >= 0) {
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336 | co.p.push(bf)
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337 | bf = ''
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338 | }
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339 | }
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340 | bf += c
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341 | break
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342 | case '0':
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343 | case '1':
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344 | case '2':
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345 | case '3':
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346 | case '4':
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347 | case '5':
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348 | case '6':
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349 | case '7':
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350 | case '8':
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351 | case '9':
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352 | bf += c
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353 | break
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354 |
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355 | case 'a':
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356 | case 'A':
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357 | case 'c':
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358 | case 'C':
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359 | case 'h':
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360 | case 'H':
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361 | case 'l':
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362 | case 'L':
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363 | case 'v':
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364 | case 'V':
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365 | case 'm':
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366 | case 'M':
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367 | case 'q':
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368 | case 'Q':
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369 | case 's':
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370 | case 'S':
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371 | case 't':
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372 | case 'T':
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373 | case 'z':
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374 | case 'Z':
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375 | if (co !== null) {
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376 | if (bf.length > 0) {
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377 | co.p.push(bf)
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378 | bf = ''
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379 | }
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380 | obj.commands.push(co)
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381 | }
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382 | co = { c: c, p: [] }
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383 | break
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384 |
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385 | case ',':
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386 | case ' ':
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387 | case '\n':
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388 | if (co !== null) {
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389 | if (bf.length > 0) {
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390 | co.p.push(bf)
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391 | bf = ''
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392 | }
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393 | }
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394 | break
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395 | default:
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396 | break
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397 | }
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398 | i++
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399 | }
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400 | if (i === l && co !== null) {
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401 | if (bf.length > 0) {
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402 | co.p.push(bf)
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403 | }
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404 | obj.commands.push(co)
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405 | }
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406 | }
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407 | return obj
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408 | }
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409 |
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410 |
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411 |
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412 |
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413 |
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414 |
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415 | const svgUse = function (element, { svgObjects }) {
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416 | const obj = { type: 'group' }
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417 |
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418 | svgTransforms(obj, element)
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419 |
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420 | svgCore(obj, element)
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421 |
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422 | svgPresentation(obj, element)
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423 |
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424 | if ('X' in element || 'Y' in element) {
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425 | let x = '0'
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426 | let y = '0'
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427 | if ('X' in element) x = element.X
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428 | if ('Y' in element) y = element.Y
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429 | if (!('transforms' in obj)) obj.transforms = []
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430 | const o = { translate: [x, y] }
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431 | obj.transforms.push(o)
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432 | }
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433 |
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434 | obj.objects = []
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435 | if ('XLINK:HREF' in element) {
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436 |
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437 | let ref = element['XLINK:HREF']
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438 | if (ref[0] === '#') { ref = ref.slice(1, ref.length) }
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439 | if (svgObjects[ref] !== undefined) {
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440 | ref = svgObjects[ref]
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441 | ref = JSON.parse(JSON.stringify(ref))
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442 | obj.objects.push(ref)
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443 | }
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444 | }
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445 | return obj
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446 | }
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447 |
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448 | module.exports = {
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449 | svgCore,
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450 | svgPresentation,
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451 | svgSvg,
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452 | svgRect,
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453 | svgCircle,
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454 | svgEllipse,
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455 | svgLine,
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456 | svgPolyline,
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457 | svgPolygon,
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458 | svgGroup,
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459 | svgPath,
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460 | svgUse
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461 | }
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