gerber-to-svg/lib/gerber-to-svg.js

Gerber and NC drill file to SVG converter

/*
@license copyright 2014 by mike cousins <mike@cousins.io> (http://cousins.io)
shared under the terms of the MIT license
view source at http://github.com/mcous/gerber-to-svg
 */

(function() {
  var DEFAULT_OPTS, Plotter, builder;

  builder = require('./obj-to-xml');

  Plotter = require('./plotter');

  DEFAULT_OPTS = {
    drill: false,
    pretty: false,
    object: false
  };

  module.exports = function(gerber, options) {
    var Parser, Reader, a, error, height, key, opts, p, val, width, xml, xmlObject, _ref;
    if (options == null) {
      options = {};
    }
    opts = {};
    for (key in DEFAULT_OPTS) {
      val = DEFAULT_OPTS[key];
      opts[key] = val;
    }
    for (key in options) {
      val = options[key];
      opts[key] = val;
    }
    if (typeof gerber === 'object') {
      if (gerber.svg != null) {
        return builder(gerber, {
          pretty: opts.pretty
        });
      } else {
        throw new Error("non SVG object cannot be converted to an SVG string");
      }
    }
    if (opts.drill) {
      Reader = require('./drill-reader');
      Parser = require('./drill-parser');
    } else {
      Reader = require('./gerber-reader');
      Parser = require('./gerber-parser');
    }
    p = new Plotter(gerber, Reader, Parser);
    try {
      xmlObject = p.plot();
    } catch (_error) {
      error = _error;
      throw new Error("Error at line " + p.reader.line + " - " + error.message);
    }
    if (!(p.bbox.xMin >= p.bbox.xMax)) {
      width = p.bbox.xMax - p.bbox.xMin;
    } else {
      p.bbox.xMin = 0;
      p.bbox.xMax = 0;
      width = 0;
    }
    if (!(p.bbox.yMin >= p.bbox.yMax)) {
      height = p.bbox.yMax - p.bbox.yMin;
    } else {
      p.bbox.yMin = 0;
      p.bbox.yMax = 0;
      height = 0;
    }
    xml = {
      svg: {
        xmlns: 'http://www.w3.org/2000/svg',
        version: '1.1',
        'xmlns:xlink': 'http://www.w3.org/1999/xlink',
        width: "" + width + p.units,
        height: "" + height + p.units,
        viewBox: [p.bbox.xMin, p.bbox.yMin, width, height],
        _: []
      }
    };
    _ref = p.attr;
    for (a in _ref) {
      val = _ref[a];
      xml.svg[a] = val;
    }
    if (p.defs.length) {
      xml.svg._.push({
        defs: {
          _: p.defs
        }
      });
    }
    if (p.group.g._.length) {
      xml.svg._.push(p.group);
    }
    if (!opts.object) {
      return builder(xml, {
        pretty: opts.pretty
      });
    } else {
      return xml;
    }
  };

}).call(this);