fabric.js/test/unit/parser.js

(function(){
  
  function makeElement() {
    var element = document.createElement('path');
    var attributes = {
      'cx':           101,
      'x':            102,
      'cy':           103,
      'y':            104,
      'r':            105,
      'fill-opacity': 0.45,
      'fill-rule':    'foo',
      'stroke-width': 4
    };
    for (var prop in attributes) {
      element.setAttribute(prop, attributes[prop]);
    }
    return element;
  }
  
  var EXPECTED_PATH_JSON = "{\"type\":\"path\",\"left\":0,\"top\":0,\"width\":93,\"height\":137,\"fill\":\"#99CCFF\",\"overlayFill\":null,\"stroke\":null,\"strokeWidth\":1,\"scaleX\":1,\"scaleY\":1,\"angle\":0,\"flipX\":false,\"flipY\":false,\"opacity\":1,\"selectable\":true,\"path\":[[\"M\",62.022,30.848],[\"c\",4.251,0.038,9.565,-2.206,13.424,-3.924],[\"c\",3.131,-1.396,4.47,-1.299,7.833,0.263],[\"c\",2.18,1.012,3.883,-1.551,5.824,-2.048],[\"c\",0.243,-0.062,0.537,0.464,0.374,0.652],[\"c\",-0.553,0.639,-2.932,1.753,-2.679,2.821],[\"c\",0.184,0.779,4.081,0.817,5.226,1.347],[\"c\",1.008,0.653,-3.22,0.665,-3.17,1.028],[\"c\",1.038,0.191,2.175,0.279,3.03,0.703],[\"c\",0.482,0.238,-0.707,0.815,-1.245,0.731],[\"c\",0.194,0.103,0.711,0.257,0.583,0.436],[\"c\",-0.144,0.891,-3.265,0.128,-4.132,-0.003],[\"c\",-0.688,-0.104,-3.754,-0.843,-3.892,0.039],[\"c\",-0.092,0.586,0.47,1.079,0.133,2.617],[\"c\",-0.314,1.438,-1.942,1.633,-1.831,1.024],[\"c\",0.273,-1.496,1.201,-1.914,-0.4,-3.564],[\"c\",-0.979,-1.01,-1.908,-2.344,-2.138,-3.425],[\"c\",-7.581,1.092,-9.456,6.321,-17.365,7.858],[\"c\",-2.787,0.541,-5.233,-1.016,-7.887,-2.27],[\"c\",0.168,0.259,0.457,0.272,0.169,1.184],[\"c\",-0.29,0.918,-0.479,2.081,-0.225,3.104],[\"c\",0.539,2.169,1.73,4.464,2.5,6.755],[\"c\",1.481,4.415,0.996,11.273,0.42,15.21],[\"c\",-0.105,0.715,0.497,1.432,0.129,2.608],[\"c\",-0.128,0.413,0.384,1.027,0.347,1.458],[\"c\",-0.195,2.236,1.106,2.01,3.446,4.502],[\"c\",-0.21,0.252,-0.926,0.504,-1.136,0.756],[\"c\",4.353,5.205,8.404,10.612,11.622,16.651],[\"c\",0.805,1.512,1.511,3.199,1.511,4.913],[\"c\",0,1.955,-1.154,2.843,-2.057,4.577],[\"c\",-0.741,1.423,-2.081,2.305,-3.121,3.526],[\"c\",-5.631,6.614,-9.57,11.287,-15.186,17.936],[\"c\",-0.976,3.091,1.141,4.783,1.093,6.394],[\"c\",-0.011,0.372,-0.267,0.74,-0.555,1.119],[\"c\",-0.452,0.595,-2.752,-1.225,-4.01,-2.617],[\"c\",-1.657,8.48,5.22,10.332,8.284,12.274],[\"c\",0.37,0.234,0.076,1.004,-0.05,1.424],[\"c\",-4.442,0.217,-7.603,0.246,-11.857,-1.172],[\"c\",-0.783,-0.963,-2.958,-5.188,-4.535,-3.406],[\"c\",-0.735,0.831,-1.092,1.932,-1.637,2.897],[\"c\",-0.462,0,-0.76,-0.247,-1.222,-0.247],[\"c\",-0.042,-1.553,0.19,-2.878,-0.044,-4.413],[\"c\",-0.633,-4.152,-1.551,-4.467,2.037,-7.866],[\"c\",1.782,-1.689,2.374,-2.065,4.045,-3.916],[\"c\",-0.552,-1.562,0.385,-2.303,-1.192,-3],[\"c\",-0.936,-0.041,-3.255,1.205,-3.535,2.152],[\"c\",-0.378,-0.042,-1.001,-0.701,-1.379,-0.742],[\"c\",0.896,-1.794,1.155,-1.791,0.926,-2.913],[\"c\",-0.796,-3.892,1.304,-4.478,3.593,-5.779],[\"c\",3.523,-3.523,6.666,-10.464,10.145,-14.605],[\"c\",1.05,-1.25,2.885,-2.043,4.019,-3.219],[\"c\",-1.26,-1.175,-2.805,-2.106,-3.779,-3.526],[\"c\",-2.437,-3.554,-6.445,-7.633,-9.421,-8.945],[\"c\",-0.756,0.168,-1.513,0.336,-2.269,0.504],[\"c\",-3.89,-2.843,-8.766,-8.817,-6.814,-16.892],[\"c\",1.413,-5.846,8.545,-7.913,2.791,-13.009],[\"c\",-1.299,-1.15,-7.22,-6.915,-8.904,-6.021],[\"c\",-1.257,0.667,-3.774,2.431,-3.966,4.015],[\"c\",-0.299,2.472,-4.275,17.925,-7.829,14.167],[\"C\",9.169,53.682,7.55,47.517,6.059,43.276],[\"c\",-0.873,-2.481,-4.009,-2.109,-5.077,-5],[\"c\",-0.368,-0.997,-1.229,-2.067,-0.914,-3.082],[\"c\",0.169,-0.545,0.63,-0.336,1.175,-0.504],[\"c\",0.535,-2.002,0.199,-1.216,1.704,-1.318],[\"c\",0,-1.215,0.604,-0.978,1.498,-0.978],[\"c\",0.987,-1.624,1.841,-0.106,4.696,1.74],[\"c\",1.461,0.945,1.292,2.708,0.987,4.319],[\"c\",-0.281,1.483,-0.582,2.403,-0.018,3.626],[\"c\",1.14,2.472,4.709,6.794,6.412,9.063],[\"c\",2.12,-2.974,1.531,-6.198,1.788,-10.647],[\"c\",0.1,-1.729,0.84,-3.361,1.26,-5.041],[\"c\",-1.504,-0.111,-2.596,-0.532,-3.277,-1.261],[\"c\",0.336,-0.588,0.672,-1.177,1.008,-1.765],[\"c\",-1.64,-1.64,-1.834,-2.188,-2.325,-4.48],[\"c\",3.162,0,2.708,-1.862,4.342,-4.09],[\"c\",-0.84,-0.504,-1.681,-1.008,-2.521,-1.512],[\"c\",3.833,-2.869,3.828,-2.76,2.539,-8.066],[\"c\",-0.877,-3.608,-0.278,-6.225,2.058,-9.733],[\"C\",25.57,-1.726,27.022,0.327,31.783,0.3],[\"c\",3.464,-0.021,6.667,0.022,8.97,5.944],[\"c\",-0.462,-0.248,-1.416,-0.428,-1.878,-0.126],[\"c\",0.126,0.588,0.825,2.984,0.5,3.49],[\"c\",-0.673,1.049,-0.867,0.977,-0.
  
  module('fabric.Parser');
  
  test('parseAttributes', function() {
    ok(fabric.parseAttributes);
    
    var element = makeElement();
    var attributeNames = 'cx cy x y r fill-opacity fill-rule stroke-width transform fill fill-rule'.split(' ');
    var parsedAttributes = fabric.parseAttributes(element, attributeNames);
    
    same({
      left:         102, 
      top:          104,
      radius:       105,
      opacity:      0.45,
      fillRule:     'foo',
      strokeWidth:  4
    }, parsedAttributes);
  });
  
  test('parseAttributesNoneValues', function() {
    var element = document.createElement('path');
    element.setAttribute('fill', 'none');
    element.setAttribute('stroke', 'none');
    
    same({ fill: '', stroke: '' }, fabric.parseAttributes(element, 'fill stroke'.split(' ')));
  });
  
  test('parseAttributesFillRule', function() {
    var element = document.createElement('path');
    element.setAttribute('fill-rule', 'evenodd');
    
    same({ fillRule: 'destination-over' }, fabric.parseAttributes(element, ['fill-rule']));
  });
  
  test('parseAttributesFillRuleWithoutTransformation', function() {
    var element = document.createElement('path');
    element.setAttribute('fill-rule', 'inherit');
    
    same({ fillRule: 'inherit' }, fabric.parseAttributes(element, ['fill-rule']));
  });
  
  test('parseAttributesTransform', function() {
    var element = document.createElement('path');
    element.setAttribute('transform', 'translate(5, 10)');
    same({ transformMatrix: [1, 0, 0, 1, 5, 10] }, fabric.parseAttributes(element, ['transform']));
  });
  
  test('parseAttributesWithParent', function() {
    var element = document.createElement('path');
    var parent = document.createElement('g');
    var grandParent = document.createElement('g');
    
    parent.appendChild(element);
    grandParent.appendChild(parent);
    
    element.setAttribute('x', '100');
    parent.setAttribute('y', '200');
    grandParent.setAttribute('fill', 'red');
    
    same({ fill: 'red', left: 100, top: 200 }, 
      fabric.parseAttributes(element, 'x y fill'.split(' ')));
  });
  
  asyncTest('parseElements', function() {
    ok(fabric.parseElements);
    
    function getOptions(options) {
      return fabric.util.object.extend(fabric.util.object.clone({ 
        left: 10, top: 20, width: 30, height: 40 
      }), options || { });
    }
    
    var elements = [
      fabric.util.makeElement('rect', getOptions()),
      fabric.util.makeElement('circle', getOptions({ r: 14 })),
      fabric.util.makeElement('path', getOptions({ d: 'M 100 100 L 300 100 L 200 300 z' })),
      fabric.util.makeElement('inexistent', getOptions())
    ];
    
    var parsedElements, error;
    try {
      fabric.parseElements(elements, function(instances) {
        parsedElements = instances;
      });
    }
    catch(err) {
      error = err;
    }
    ok(error === undefined, 'No error is raised');
    
    setTimeout(function() {
      if (parsedElements) {
        ok(parsedElements[0] instanceof fabric.Rect);
        ok(parsedElements[1] instanceof fabric.Circle);
        ok(parsedElements[2] instanceof fabric.Path);
      }
      start();
    }, 1000);
  });
  
  test('parseStyleAttribute', function() {
    ok(fabric.parseStyleAttribute);
    
    var element = document.createElement('path');
    element.setAttribute('style', 'left:10px;top:22.3em;width:103.45pt;height:20%;');
    
    var expectedObject = { 
      'left':   '10px', 
      'top':    '22.3em', 
      'width':  '103.45pt', 
      'height': '20%' 
    };
    same(expectedObject, fabric.parseStyleAttribute(element));
  });
  
  test('parseStyleAttribute with one pair', function() {
    var element = document.createElement('path');
    element.setAttribute('style', 'left:10px');
    
    var expectedObject = { 
      'left': '10px'
    };
    same(expectedObject, fabric.parseStyleAttribute(element));
  });
  
  test('parseAttributes (style to have higher priority than attribute)', function() {
    var element = document.createElement('path');
    element.setAttribute('style', 'fill:red');
    element.setAttribute('fill', 'green');
    
    var expectedObject = { 
      'fill': 'red'
    };
    same(expectedObject, fabric.parseAttributes(element, ['path']));
  });
  
  test('parsePointsAttribute', function() {
    ok(fabric.parsePointsAttribute);
    
    var element = document.createElement('polygon');
    element.setAttribute('points', '10,12           20,22,  -0.52,0.001 2.3e2,2.3e-2, 10,-1     ');
    
    var actualPoints = fabric.parsePointsAttribute(element.getAttribute('points'));
    
    equals(actualPoints[0].x, 10);
    equals(actualPoints[0].y, 12);
    
    equals(actualPoints[1].x, 20);
    equals(actualPoints[1].y, 22);
    
    equals(actualPoints[2].x, -0.52);
    equals(actualPoints[2].y, 0.001);
    
    equals(actualPoints[3].x, 2.3e2);
    equals(actualPoints[3].y, 2.3e-2);
    
    equals(actualPoints[4].x, 10);
    equals(actualPoints[4].y, -1);
  });
  
  test('parseTransformAttribute', function() {
    ok(fabric.parseTransformAttribute);
    var element = document.createElement('path');
    
    //'translate(-10,-20) scale(2) rotate(45) translate(5,10)'
    
    element.setAttribute('transform', 'translate(5,10)');
    var parsedValue = fabric.parseTransformAttribute(element.getAttribute('transform'));
    same([1,0,0,1,5,10], parsedValue);
    
    element.setAttribute('transform', 'translate(-10,-20)');
    var parsedValue = fabric.parseTransformAttribute(element.getAttribute('transform'));
    same([1,0,0,1,-10,-20], parsedValue);
    
    var ANGLE = 90;
    element.setAttribute('transform', 'rotate(' + ANGLE + ')');
    var parsedValue = fabric.parseTransformAttribute(element.getAttribute('transform'));
    same([Math.cos(ANGLE), Math.sin(ANGLE), -Math.sin(ANGLE), Math.cos(ANGLE), 0, 0], parsedValue);
    
    element.setAttribute('transform', 'scale(3.5)');
    var parsedValue = fabric.parseTransformAttribute(element.getAttribute('transform'));
    same([3.5,0,0,3.5,0,0], parsedValue);
    
    element.setAttribute('transform', 'scale(2 13)');
    var parsedValue = fabric.parseTransformAttribute(element.getAttribute('transform'));
    same([2,0,0,13,0,0], parsedValue);
    
    element.setAttribute('transform', 'skewX(2)');
    var parsedValue = fabric.parseTransformAttribute(element.getAttribute('transform'));
    same([1,0,2,1,0,0], parsedValue);
    
    element.setAttribute('transform', 'skewY(234.111)');
    var parsedValue = fabric.parseTransformAttribute(element.getAttribute('transform'));
    same([1,234.111,0,1,0,0], parsedValue);
    
    element.setAttribute('transform', 'matrix(1,2,3,4,5,6)');
    var parsedValue = fabric.parseTransformAttribute(element.getAttribute('transform'));
    same([1,2,3,4,5,6], parsedValue);
    
    // TODO (kangax): matrices multiplication is not yet supported
    
    // element.setAttribute('transform', 'translate(21,31) translate(11,22)');
    // var parsedValue = fabric.parseTransformAttribute(element.getAttribute('transform'));
    // this.assertEnumEqual([1,0,0,1,32,53], parsedValue);
    
    // element.setAttribute('transform', 'scale(2 13) translate(5,15) skewX(11.22)');
    // var parsedValue = fabric.parseTransformAttribute(element.getAttribute('transform'));
    // same([2,0,11.22,13,5,15], parsedValue);
    
  });
  
  asyncTest('parseSVGDocument', function() {
    ok(fabric.parseSVGDocument);
    
    var data;
    fabric.util.request('../fixtures/path.svg', {
      method: 'get',
      onComplete: function(resp) {
        var doc = resp.responseXML;
        fabric.parseSVGDocument(doc.documentElement, function() {
          data = arguments[0];
        });
      }
    });
    
    setTimeout(function() {
      equals(typeof data, 'object');
      equals(data.length, 1);
      
      if (data) {
        var path = data[0];

        ok(path instanceof fabric.Path);
        equals(JSON.stringify(path.toJSON()), EXPECTED_PATH_JSON);
      }
      start();
    }, 1500);
  });
  
  // https://github.com/kangax/fabric.js/issues/25
  asyncTest('parsing one element should not "leak" its "fill" value onto parsing of following element', function() {
    
    var objects;
    fabric.util.request('../fixtures/svg_with_rect.svg', {
      method: 'get',
      onComplete: function(resp) {
        var doc = resp.responseXML;
        fabric.parseSVGDocument(doc.documentElement, function() {
          objects = arguments[0];
        });
      }
    });
    
    setTimeout(function() {
      equals(objects[1].fill, 'green');
      
      start();
    }, 1500);
  });
  
  test('opacity attribute', function() {
    var tagNames = ['rect', 'path', 'circle', 'ellipse', 'polygon'];
    
    for (var i = tagNames.length; i--; ) {
      var el = document.createElement(tagNames[i]);
      var opacityValue = Math.random().toFixed(2);
      el.setAttribute('opacity', opacityValue);
      var obj = fabric.Rect.fromElement(el);
      equals(parseFloat(opacityValue), obj.opacity, 
        'opacity should be parsed correctly from "opacity" attribute of ' + tagNames[i] + ' element');
    }
  });
  
})();