svg-path-parser

svg-path-parser

An SVG path parser, built from the PEG.js grammar specified here, published as an NPM module.

Grammar originally written by Gavin Kistner.

Usage

require('svg-path-parser')(d)

Takes an SVG path string. The following:

var parse = require('svg-path-parser')
var path = [
  'M-150,150'
, 'L200,100'
, 'H250 V170'
, 'Q350,90 375,150'
, 'T400,150'
, 'C500,100 575,300 560,150'
, 'S650,160 550,300'
, 'Z M500,200'
, 'A25,35 -80 1,1 450,220 Z'
].join(' ')

console.log(parse(path))

Should yield an array of commands that define the path, like so:

[
  {
    "command": "moveto",
    "relative": false,
    "args": [
      {
        "x": -150,
        "y": 150
      }
    ]
  },
  {
    "command": "lineto",
    "relative": false,
    "args": [
      {
        "x": 200,
        "y": 100
      }
    ]
  },
  {
    "command": "horizontal lineto",
    "relative": false,
    "args": [
      250
    ]
  },
  {
    "command": "vertical lineto",
    "relative": false,
    "args": [
      170
    ]
  },
  {
    "command": "quadratic curveto",
    "relative": false,
    "args": [
      {
        "x1": 350,
        "y1": 90,
        "x": 375,
        "y": 150
      }
    ]
  },
  {
    "command": "smooth quadratic curveto",
    "relative": false,
    "args": [
      {
        "x": 400,
        "y": 150
      }
    ]
  },
  {
    "command": "curveto",
    "relative": false,
    "args": [
      {
        "x1": 500,
        "y1": 100,
        "x2": 575,
        "y2": 300,
        "x": 560,
        "y": 150
      }
    ]
  },
  {
    "command": "smooth curveto",
    "relative": false,
    "args": [
      {
        "x2": 650,
        "y2": 160,
        "x": 550,
        "y": 300
      }
    ]
  },
  {
    "command": "closepath"
  },
  {
    "command": "moveto",
    "relative": false,
    "args": [
      {
        "x": 500,
        "y": 200
      }
    ]
  },
  {
    "command": "elliptical arc",
    "relative": false,
    "args": [
      {
        "rx": 25,
        "ry": 35,
        "xAxisRotation": -80,
        "largeArc": true,
        "sweep": true,
        "x": 450,
        "y": 220
      }
    ]
  },
  {
    "command": "closepath"
  }
]

History

v0.0.3 - 2014-Oct-1

• Fix bug that prevented parsing some valid documents.

v0.0.2 - 2014-Oct-1

• Fix parsing of numbers other than integers to work.
• First moveto command is always absolute.
• Additional coordinates after moveto are treated as lineto.