forked from enviPath/enviPy
Current Dev State
This commit is contained in:
Tim Lorsbach
508
static/js/ketcher2/node_modules/svg-pathdata/src/SVGPathDataParser.js
generated
vendored
Executable file
508
static/js/ketcher2/node_modules/svg-pathdata/src/SVGPathDataParser.js
generated
vendored
Executable file
@ -0,0 +1,508 @@
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'use strict';
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// Parse SVG PathData
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// http://www.w3.org/TR/SVG/paths.html#PathDataBNF
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// Access to SVGPathData constructor
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var SVGPathData = require('./SVGPathData.js');
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// TransformStream inherance required modules
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var TransformStream = require('readable-stream').Transform;
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var util = require('util');
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// Private consts : Char groups
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var WSP = [' ', '\t', '\r', '\n'];
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var DIGITS = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
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var SIGNS = ['-', '+'];
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var EXPONENTS = ['e', 'E'];
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var DECPOINT = ['.'];
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var FLAGS = ['0', '1'];
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var COMMA = [','];
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var COMMANDS = [
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'm', 'M', 'z', 'Z', 'l', 'L', 'h', 'H', 'v', 'V', 'c', 'C',
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's', 'S', 'q', 'Q', 't', 'T', 'a', 'A',
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];
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// Inherit of transform stream
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util.inherits(SVGPathDataParser, TransformStream);
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// Constructor
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function SVGPathDataParser(options) {
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// Ensure new were used
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if(!(this instanceof SVGPathDataParser)) {
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return new SVGPathDataParser(options);
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}
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// Parent constructor
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TransformStream.call(this, {
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objectMode: true,
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});
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// Setting objectMode separately
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this._writableState.objectMode = false;
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this._readableState.objectMode = true;
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// Parsing vars
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this.state = SVGPathDataParser.STATE_COMMAS_WSPS;
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this.curNumber = '';
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this.curCommand = null;
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this._flush = function(callback) {
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this._transform(new Buffer(' '), 'utf-8', function() {});
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// Adding residual command
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if(null !== this.curCommand) {
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if(this.curCommand.invalid) {
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this.emit('error',
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new SyntaxError('Unterminated command at the path end.'));
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}
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this.push(this.curCommand);
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this.curCommand = null;
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this.state ^= this.state & SVGPathDataParser.STATE_COMMANDS_MASK;
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}
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callback();
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};
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this._transform = function(chunk, encoding, callback) {
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var str = chunk.toString('buffer' !== encoding ? encoding : 'utf8');
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var i;
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var j;
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for(i = 0, j = str.length; i < j; i++) {
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// White spaces parsing
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if(this.state & SVGPathDataParser.STATE_WSP ||
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this.state & SVGPathDataParser.STATE_WSPS) {
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if(-1 !== WSP.indexOf(str[i])) {
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this.state ^= this.state & SVGPathDataParser.STATE_WSP;
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// any space stops current number parsing
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if('' !== this.curNumber) {
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this.state ^= this.state & SVGPathDataParser.STATE_NUMBER_MASK;
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} else {
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continue;
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}
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}
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}
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// Commas parsing
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if(this.state & SVGPathDataParser.STATE_COMMA ||
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this.state & SVGPathDataParser.STATE_COMMAS) {
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if(-1 !== COMMA.indexOf(str[i])) {
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this.state ^= this.state & SVGPathDataParser.STATE_COMMA;
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// any comma stops current number parsing
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if('' !== this.curNumber) {
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this.state ^= this.state & SVGPathDataParser.STATE_NUMBER_MASK;
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} else {
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continue;
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}
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}
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}
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// Numbers parsing : -125.25e-125
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if(this.state & SVGPathDataParser.STATE_NUMBER) {
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// Reading the sign
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if((this.state & SVGPathDataParser.STATE_NUMBER_MASK) ===
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SVGPathDataParser.STATE_NUMBER) {
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this.state |= SVGPathDataParser.STATE_NUMBER_INT |
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SVGPathDataParser.STATE_NUMBER_DIGITS;
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if(-1 !== SIGNS.indexOf(str[i])) {
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this.curNumber += str[i];
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continue;
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}
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}
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// Reading the exponent sign
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if(this.state & SVGPathDataParser.STATE_NUMBER_EXPSIGN) {
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this.state ^= SVGPathDataParser.STATE_NUMBER_EXPSIGN;
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this.state |= SVGPathDataParser.STATE_NUMBER_DIGITS;
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if(-1 !== SIGNS.indexOf(str[i])) {
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this.curNumber += str[i];
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continue;
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}
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}
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// Reading digits
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if(this.state & SVGPathDataParser.STATE_NUMBER_DIGITS) {
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if(-1 !== DIGITS.indexOf(str[i])) {
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this.curNumber += str[i];
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continue;
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}
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this.state ^= SVGPathDataParser.STATE_NUMBER_DIGITS;
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}
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// Ended reading left side digits
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if(this.state & SVGPathDataParser.STATE_NUMBER_INT) {
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this.state ^= SVGPathDataParser.STATE_NUMBER_INT;
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// if got a point, reading right side digits
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if(-1 !== DECPOINT.indexOf(str[i])) {
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this.curNumber += str[i];
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this.state |= SVGPathDataParser.STATE_NUMBER_FLOAT |
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SVGPathDataParser.STATE_NUMBER_DIGITS;
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continue;
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// if got e/E, reading the exponent
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} else if(-1 !== EXPONENTS.indexOf(str[i])) {
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this.curNumber += str[i];
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this.state |= SVGPathDataParser.STATE_NUMBER_EXP |
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SVGPathDataParser.STATE_NUMBER_EXPSIGN;
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continue;
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}
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// else we're done with that number
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this.state ^= this.state & SVGPathDataParser.STATE_NUMBER_MASK;
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}
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// Ended reading decimal digits
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if(this.state & SVGPathDataParser.STATE_NUMBER_FLOAT) {
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this.state ^= SVGPathDataParser.STATE_NUMBER_FLOAT;
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// if got e/E, reading the exponent
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if(-1 !== EXPONENTS.indexOf(str[i])) {
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this.curNumber += str[i];
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this.state |= SVGPathDataParser.STATE_NUMBER_EXP |
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SVGPathDataParser.STATE_NUMBER_EXPSIGN;
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continue;
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}
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// else we're done with that number
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this.state ^= this.state & SVGPathDataParser.STATE_NUMBER_MASK;
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}
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// Ended reading exponent digits
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if(this.state & SVGPathDataParser.STATE_NUMBER_EXP) {
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// we're done with that number
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this.state ^= this.state & SVGPathDataParser.STATE_NUMBER_MASK;
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}
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}
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// New number
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if(this.curNumber) {
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// Horizontal move to command (x)
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if(this.state & SVGPathDataParser.STATE_HORIZ_LINE_TO) {
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if(null === this.curCommand) {
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this.push({
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type: SVGPathData.HORIZ_LINE_TO,
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relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
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x: Number(this.curNumber),
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});
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} else {
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this.curCommand.x = Number(this.curNumber);
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delete this.curCommand.invalid;
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this.push(this.curCommand);
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this.curCommand = null;
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}
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this.state |= SVGPathDataParser.STATE_NUMBER;
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// Vertical move to command (y)
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} else if(this.state & SVGPathDataParser.STATE_VERT_LINE_TO) {
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if(null === this.curCommand) {
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this.push({
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type: SVGPathData.VERT_LINE_TO,
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relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
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y: Number(this.curNumber),
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});
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} else {
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this.curCommand.y = Number(this.curNumber);
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delete this.curCommand.invalid;
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this.push(this.curCommand);
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this.curCommand = null;
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}
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this.state |= SVGPathDataParser.STATE_NUMBER;
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// Move to / line to / smooth quadratic curve to commands (x, y)
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} else if(this.state & SVGPathDataParser.STATE_MOVE_TO ||
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this.state & SVGPathDataParser.STATE_LINE_TO ||
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this.state & SVGPathDataParser.STATE_SMOOTH_QUAD_TO) {
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if(null === this.curCommand) {
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this.curCommand = {
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type: (this.state & SVGPathDataParser.STATE_MOVE_TO ?
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SVGPathData.MOVE_TO :
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(this.state & SVGPathDataParser.STATE_LINE_TO ?
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SVGPathData.LINE_TO : SVGPathData.SMOOTH_QUAD_TO
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)
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),
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relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
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x: Number(this.curNumber),
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};
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} else if('undefined' === typeof this.curCommand.x) {
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this.curCommand.x = Number(this.curNumber);
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} else {
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delete this.curCommand.invalid;
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this.curCommand.y = Number(this.curNumber);
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this.push(this.curCommand);
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this.curCommand = null;
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// Switch to line to state
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if(this.state & SVGPathDataParser.STATE_MOVE_TO) {
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this.state ^= SVGPathDataParser.STATE_MOVE_TO;
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this.state |= SVGPathDataParser.STATE_LINE_TO;
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}
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}
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this.state |= SVGPathDataParser.STATE_NUMBER;
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// Curve to commands (x1, y1, x2, y2, x, y)
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} else if(this.state & SVGPathDataParser.STATE_CURVE_TO) {
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if(null === this.curCommand) {
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this.curCommand = {
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type: SVGPathData.CURVE_TO,
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relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
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invalid: true,
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x2: Number(this.curNumber),
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};
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} else if('undefined' === typeof this.curCommand.x2) {
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this.curCommand.x2 = Number(this.curNumber);
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} else if('undefined' === typeof this.curCommand.y2) {
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this.curCommand.y2 = Number(this.curNumber);
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} else if('undefined' === typeof this.curCommand.x1) {
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this.curCommand.x1 = Number(this.curNumber);
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} else if('undefined' === typeof this.curCommand.y1) {
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this.curCommand.y1 = Number(this.curNumber);
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} else if('undefined' === typeof this.curCommand.x) {
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this.curCommand.x = Number(this.curNumber);
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} else if('undefined' === typeof this.curCommand.y) {
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this.curCommand.y = Number(this.curNumber);
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delete this.curCommand.invalid;
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this.push(this.curCommand);
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this.curCommand = null;
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}
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this.state |= SVGPathDataParser.STATE_NUMBER;
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// Smooth curve to commands (x1, y1, x, y)
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} else if(this.state & SVGPathDataParser.STATE_SMOOTH_CURVE_TO) {
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if(null === this.curCommand) {
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this.curCommand = {
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type: SVGPathData.SMOOTH_CURVE_TO,
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relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
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invalid: true,
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x2: Number(this.curNumber),
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};
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} else if('undefined' === typeof this.curCommand.x2) {
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this.curCommand.x2 = Number(this.curNumber);
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} else if('undefined' === typeof this.curCommand.y2) {
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this.curCommand.y2 = Number(this.curNumber);
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} else if('undefined' === typeof this.curCommand.x) {
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this.curCommand.x = Number(this.curNumber);
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} else if('undefined' === typeof this.curCommand.y) {
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this.curCommand.y = Number(this.curNumber);
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||||
delete this.curCommand.invalid;
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this.push(this.curCommand);
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this.curCommand = null;
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}
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this.state |= SVGPathDataParser.STATE_NUMBER;
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// Quadratic bezier curve to commands (x1, y1, x, y)
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} else if(this.state & SVGPathDataParser.STATE_QUAD_TO) {
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if(null === this.curCommand) {
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this.curCommand = {
|
||||
type: SVGPathData.QUAD_TO,
|
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relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
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invalid: true,
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x1: Number(this.curNumber),
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||||
};
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||||
} else if('undefined' === typeof this.curCommand.x1) {
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||||
this.curCommand.x1 = Number(this.curNumber);
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||||
} else if('undefined' === typeof this.curCommand.y1) {
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||||
this.curCommand.y1 = Number(this.curNumber);
|
||||
} else if('undefined' === typeof this.curCommand.x) {
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||||
this.curCommand.x = Number(this.curNumber);
|
||||
} else if('undefined' === typeof this.curCommand.y) {
|
||||
this.curCommand.y = Number(this.curNumber);
|
||||
delete this.curCommand.invalid;
|
||||
this.push(this.curCommand);
|
||||
this.curCommand = null;
|
||||
}
|
||||
this.state |= SVGPathDataParser.STATE_NUMBER;
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// Elliptic arc commands (rX, rY, xRot, lArcFlag, sweepFlag, x, y)
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} else if(this.state & SVGPathDataParser.STATE_ARC) {
|
||||
if(null === this.curCommand) {
|
||||
this.curCommand = {
|
||||
type: SVGPathData.ARC,
|
||||
relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
|
||||
invalid: true,
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||||
rX: Number(this.curNumber),
|
||||
};
|
||||
} else if('undefined' === typeof this.curCommand.rX) {
|
||||
if(0 > Number(this.curNumber)) {
|
||||
this.emit('error', new SyntaxError('Expected positive number,' +
|
||||
' got "' + this.curNumber + '" at index "' + i + '"'));
|
||||
}
|
||||
this.curCommand.rX = Number(this.curNumber);
|
||||
} else if('undefined' === typeof this.curCommand.rY) {
|
||||
if(0 > Number(this.curNumber)) {
|
||||
this.emit('error', new SyntaxError('Expected positive number,' +
|
||||
' got "' + this.curNumber + '" at index "' + i + '"'));
|
||||
}
|
||||
this.curCommand.rY = Number(this.curNumber);
|
||||
} else if('undefined' === typeof this.curCommand.xRot) {
|
||||
this.curCommand.xRot = Number(this.curNumber);
|
||||
} else if('undefined' === typeof this.curCommand.lArcFlag) {
|
||||
if(-1 === FLAGS.indexOf(this.curNumber)) {
|
||||
this.emit('error', new SyntaxError('Expected a flag, got "' +
|
||||
this.curNumber + '" at index "' + i + '"'));
|
||||
}
|
||||
this.curCommand.lArcFlag = Number(this.curNumber);
|
||||
} else if('undefined' === typeof this.curCommand.sweepFlag) {
|
||||
if('0' !== this.curNumber && '1' !== this.curNumber) {
|
||||
this.emit('error', new SyntaxError('Expected a flag, got "' +
|
||||
this.curNumber + '" at index "' + i + '"'));
|
||||
}
|
||||
this.curCommand.sweepFlag = Number(this.curNumber);
|
||||
} else if('undefined' === typeof this.curCommand.x) {
|
||||
this.curCommand.x = Number(this.curNumber);
|
||||
} else if('undefined' === typeof this.curCommand.y) {
|
||||
this.curCommand.y = Number(this.curNumber);
|
||||
delete this.curCommand.invalid;
|
||||
this.push(this.curCommand);
|
||||
this.curCommand = null;
|
||||
}
|
||||
this.state |= SVGPathDataParser.STATE_NUMBER;
|
||||
}
|
||||
this.curNumber = '';
|
||||
// Continue if a white space or a comma was detected
|
||||
if(-1 !== WSP.indexOf(str[i]) || -1 !== COMMA.indexOf(str[i])) {
|
||||
continue;
|
||||
}
|
||||
// if a sign is detected, then parse the new number
|
||||
if(-1 !== SIGNS.indexOf(str[i])) {
|
||||
this.curNumber = str[i];
|
||||
this.state |= SVGPathDataParser.STATE_NUMBER_INT |
|
||||
SVGPathDataParser.STATE_NUMBER_DIGITS;
|
||||
continue;
|
||||
}
|
||||
// if the decpoint is detected, then parse the new number
|
||||
if(-1 !== DECPOINT.indexOf(str[i])) {
|
||||
this.curNumber = str[i];
|
||||
this.state |= SVGPathDataParser.STATE_NUMBER_FLOAT |
|
||||
SVGPathDataParser.STATE_NUMBER_DIGITS;
|
||||
continue;
|
||||
}
|
||||
}
|
||||
// End of a command
|
||||
if(-1 !== COMMANDS.indexOf(str[i])) {
|
||||
// Adding residual command
|
||||
if(null !== this.curCommand) {
|
||||
if(this.curCommand.invalid) {
|
||||
this.emit('error',
|
||||
new SyntaxError('Unterminated command at index ' + i + '.'));
|
||||
}
|
||||
this.push(this.curCommand);
|
||||
this.curCommand = null;
|
||||
this.state ^= this.state & SVGPathDataParser.STATE_COMMANDS_MASK;
|
||||
}
|
||||
}
|
||||
// Detecting the next command
|
||||
this.state ^= this.state & SVGPathDataParser.STATE_COMMANDS_MASK;
|
||||
// Is the command relative
|
||||
if(str[i] === str[i].toLowerCase()) {
|
||||
this.state |= SVGPathDataParser.STATE_RELATIVE;
|
||||
} else {
|
||||
this.state ^= this.state & SVGPathDataParser.STATE_RELATIVE;
|
||||
}
|
||||
// Horizontal move to command
|
||||
if('z' === str[i].toLowerCase()) {
|
||||
this.push({
|
||||
type: SVGPathData.CLOSE_PATH,
|
||||
});
|
||||
this.state = SVGPathDataParser.STATE_COMMAS_WSPS;
|
||||
continue;
|
||||
// Horizontal move to command
|
||||
} else if('h' === str[i].toLowerCase()) {
|
||||
this.state |= SVGPathDataParser.STATE_HORIZ_LINE_TO;
|
||||
this.curCommand = {
|
||||
type: SVGPathData.HORIZ_LINE_TO,
|
||||
relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
|
||||
invalid: true,
|
||||
};
|
||||
// Vertical move to command
|
||||
} else if('v' === str[i].toLowerCase()) {
|
||||
this.state |= SVGPathDataParser.STATE_VERT_LINE_TO;
|
||||
this.curCommand = {
|
||||
type: SVGPathData.VERT_LINE_TO,
|
||||
relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
|
||||
invalid: true,
|
||||
};
|
||||
// Move to command
|
||||
} else if('m' === str[i].toLowerCase()) {
|
||||
this.state |= SVGPathDataParser.STATE_MOVE_TO;
|
||||
this.curCommand = {
|
||||
type: SVGPathData.MOVE_TO,
|
||||
relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
|
||||
invalid: true,
|
||||
};
|
||||
// Line to command
|
||||
} else if('l' === str[i].toLowerCase()) {
|
||||
this.state |= SVGPathDataParser.STATE_LINE_TO;
|
||||
this.curCommand = {
|
||||
type: SVGPathData.LINE_TO,
|
||||
relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
|
||||
invalid: true,
|
||||
};
|
||||
// Curve to command
|
||||
} else if('c' === str[i].toLowerCase()) {
|
||||
this.state |= SVGPathDataParser.STATE_CURVE_TO;
|
||||
this.curCommand = {
|
||||
type: SVGPathData.CURVE_TO,
|
||||
relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
|
||||
invalid: true,
|
||||
};
|
||||
// Smooth curve to command
|
||||
} else if('s' === str[i].toLowerCase()) {
|
||||
this.state |= SVGPathDataParser.STATE_SMOOTH_CURVE_TO;
|
||||
this.curCommand = {
|
||||
type: SVGPathData.SMOOTH_CURVE_TO,
|
||||
relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
|
||||
invalid: true,
|
||||
};
|
||||
// Quadratic bezier curve to command
|
||||
} else if('q' === str[i].toLowerCase()) {
|
||||
this.state |= SVGPathDataParser.STATE_QUAD_TO;
|
||||
this.curCommand = {
|
||||
type: SVGPathData.QUAD_TO,
|
||||
relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
|
||||
invalid: true,
|
||||
};
|
||||
// Smooth quadratic bezier curve to command
|
||||
} else if('t' === str[i].toLowerCase()) {
|
||||
this.state |= SVGPathDataParser.STATE_SMOOTH_QUAD_TO;
|
||||
this.curCommand = {
|
||||
type: SVGPathData.SMOOTH_QUAD_TO,
|
||||
relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
|
||||
invalid: true,
|
||||
};
|
||||
// Elliptic arc command
|
||||
} else if('a' === str[i].toLowerCase()) {
|
||||
this.state |= SVGPathDataParser.STATE_ARC;
|
||||
this.curCommand = {
|
||||
type: SVGPathData.ARC,
|
||||
relative: !!(this.state & SVGPathDataParser.STATE_RELATIVE),
|
||||
invalid: true,
|
||||
};
|
||||
// Unkown command
|
||||
} else {
|
||||
this.emit('error', new SyntaxError('Unexpected character "' + str[i] +
|
||||
'" at index ' + i + '.'));
|
||||
}
|
||||
// White spaces can follow a command
|
||||
this.state |= SVGPathDataParser.STATE_COMMAS_WSPS |
|
||||
SVGPathDataParser.STATE_NUMBER;
|
||||
}
|
||||
callback();
|
||||
};
|
||||
}
|
||||
|
||||
// Static consts
|
||||
// Parsing states
|
||||
SVGPathDataParser.STATE_WSP = 1;
|
||||
SVGPathDataParser.STATE_WSPS = 2;
|
||||
SVGPathDataParser.STATE_COMMA = 4;
|
||||
SVGPathDataParser.STATE_COMMAS = 8;
|
||||
SVGPathDataParser.STATE_COMMAS_WSPS =
|
||||
SVGPathDataParser.STATE_WSP | SVGPathDataParser.STATE_WSPS |
|
||||
SVGPathDataParser.STATE_COMMA | SVGPathDataParser.STATE_COMMAS;
|
||||
SVGPathDataParser.STATE_NUMBER = 16;
|
||||
SVGPathDataParser.STATE_NUMBER_DIGITS = 32;
|
||||
SVGPathDataParser.STATE_NUMBER_INT = 64;
|
||||
SVGPathDataParser.STATE_NUMBER_FLOAT = 128;
|
||||
SVGPathDataParser.STATE_NUMBER_EXP = 256;
|
||||
SVGPathDataParser.STATE_NUMBER_EXPSIGN = 512;
|
||||
SVGPathDataParser.STATE_NUMBER_MASK = SVGPathDataParser.STATE_NUMBER |
|
||||
SVGPathDataParser.STATE_NUMBER_DIGITS | SVGPathDataParser.STATE_NUMBER_INT |
|
||||
SVGPathDataParser.STATE_NUMBER_EXP | SVGPathDataParser.STATE_NUMBER_FLOAT;
|
||||
SVGPathDataParser.STATE_RELATIVE = 1024;
|
||||
SVGPathDataParser.STATE_CLOSE_PATH = 2048; // Close path command (z/Z)
|
||||
SVGPathDataParser.STATE_MOVE_TO = 4096; // Move to command (m/M)
|
||||
SVGPathDataParser.STATE_LINE_TO = 8192; // Line to command (l/L=)
|
||||
SVGPathDataParser.STATE_HORIZ_LINE_TO = 16384; // Horizontal line to command (h/H)
|
||||
SVGPathDataParser.STATE_VERT_LINE_TO = 32768; // Vertical line to command (v/V)
|
||||
SVGPathDataParser.STATE_CURVE_TO = 65536; // Curve to command (c/C)
|
||||
SVGPathDataParser.STATE_SMOOTH_CURVE_TO = 131072; // Smooth curve to command (s/S)
|
||||
SVGPathDataParser.STATE_QUAD_TO = 262144; // Quadratic bezier curve to command (q/Q)
|
||||
SVGPathDataParser.STATE_SMOOTH_QUAD_TO = 524288; // Smooth quadratic bezier curve to command (t/T)
|
||||
SVGPathDataParser.STATE_ARC = 1048576; // Elliptic arc command (a/A)
|
||||
SVGPathDataParser.STATE_COMMANDS_MASK =
|
||||
SVGPathDataParser.STATE_CLOSE_PATH | SVGPathDataParser.STATE_MOVE_TO |
|
||||
SVGPathDataParser.STATE_LINE_TO | SVGPathDataParser.STATE_HORIZ_LINE_TO |
|
||||
SVGPathDataParser.STATE_VERT_LINE_TO | SVGPathDataParser.STATE_CURVE_TO |
|
||||
SVGPathDataParser.STATE_SMOOTH_CURVE_TO | SVGPathDataParser.STATE_QUAD_TO |
|
||||
SVGPathDataParser.STATE_SMOOTH_QUAD_TO | SVGPathDataParser.STATE_ARC;
|
||||
|
||||
module.exports = SVGPathDataParser;
|
||||
Reference in New Issue
Block a user