@google/model-viewer/dist/unit-tests-legacy.js

Easily display interactive 3D models on the web and in AR!

/**
 * Copyright (c) 2014-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
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assertIsArCandidate(){if(IS_WEBXR_AR_CANDIDATE){return;}var missingApis=[];if(!HAS_WEBXR_DEVICE_API){missingApis.push('WebXR Device API');}if(!HAS_WEBXR_HIT_TEST_API){missingApis.push('WebXR Hit Test API');}throw new Error("The following APIs are required for AR, but are missing in this browser: ".concat(missingApis.join(', ')));};var toFullUrl=function toFullUrl(partialUrl){var url=new URL(partialUrl,window.location.toString());return url.toString();};var throttle=function throttle(fn,ms){var timer=null;var throttled=function throttled(){if(timer!=null){return;}fn.apply(void 0,arguments);timer=self.setTimeout(function(){return timer=null;},ms);};throttled.flush=function(){if(timer!=null){self.clearTimeout(timer);timer=null;}};return throttled;};var debounce=function debounce(fn,ms){var timer=null;return function(){for(var _len=arguments.length,args=new Array(_len),_key=0;_key<_len;_key++){args[_key]=arguments[_key];}if(timer!=null){self.clearTimeout(timer);}timer=self.setTimeout(function(){timer=null;fn.apply(void 0,args);},ms);};};var step=function step(edge,value){return value<edge?0:1;};var clamp=function clamp(value,lowerLimit,upperLimit){return Math.max(lowerLimit===-Infinity?value:lowerLimit,Math.min(upperLimit===Infinity?value:upperLimit,value));};var CAPPED_DEVICE_PIXEL_RATIO=1;var resolveDpr=function(){var HAS_META_VIEWPORT_TAG=function(){var metas=document.head!=null?Array.from(document.head.querySelectorAll('meta')):[];var _iteratorNormalCompletion=true;var _didIteratorError=false;var _iteratorError=undefined;try{for(var _iterator=metas[Symbol.iterator](),_step;!(_iteratorNormalCompletion=(_step=_iterator.next()).done);_iteratorNormalCompletion=true){var meta=_step.value;if(meta.name==='viewport'){return true;}}}catch(err){_didIteratorError=true;_iteratorError=err;}finally{try{if(!_iteratorNormalCompletion&&_iterator.return!=null){_iterator.return();}}finally{if(_didIteratorError){throw _iteratorError;}}}return false;}();if(!HAS_META_VIEWPORT_TAG){console.warn('No <meta name="viewport"> detected; <model-viewer> will cap pixel density at 1.');}return function(){return HAS_META_VIEWPORT_TAG?window.devicePixelRatio:CAPPED_DEVICE_PIXEL_RATIO;};}();var getFirstMapKey=function getFirstMapKey(map){if(map.keys!=null){return map.keys().next().value||null;}var firstKey=null;try{map.forEach(function(_value,key,_map){firstKey=key;throw new Error();});}catch(_error){}return firstKey;};var expect=chai.expect;suite('utils',function(){suite('deserializeUrl',function(){test('returns a string given a string',function(){expect(deserializeUrl('foo')).to.be.a('string');});test('returns null given a null-ish value',function(){expect(deserializeUrl(null)).to.be.equal(null);});test('yields a url on the same origin for relative paths',function(){var origin=window.location.origin;expect(deserializeUrl('foo').indexOf(origin)).to.be.equal(0);});});suite('resolveDpr',function(){suite('when <meta name="viewport"> is present',function(){test('resolves the device pixel ratio',function(){var resolvedDpr=resolveDpr();var actualDpr=self.devicePixelRatio;expect(resolvedDpr).to.be.equal(actualDpr);});});suite('when <meta name="viewport"> is not present',function(){test.skip('caps the device pixel ratio to 1',function(){});});});suite('step',function(){test('returns 0 for values below edge',function(){expect(step(0.5,0.1)).to.be.equal(0);});test('returns 1 for values above edge',function(){expect(step(0.5,0.9)).to.be.equal(1);});});suite('clamp',function(){test('numbers below lower limit adjusted to lower limit',function(){expect(clamp(1.0,2.0,3.0)).to.be.equal(2.0);});test('numbers above upper limit adjusted to upper limit',function(){expect(clamp(4.0,2.0,3.0)).to.be.equal(3.0);});test('numbers within lower and upper limits unchanged',function(){expect(clamp(2.5,2.0,3.0)).to.be.equal(2.5);});});});var numberNode=function numberNode(value,unit){return{type:'number',number:value,unit:unit};};var parseExpressions=function(){var cache={};var MAX_PARSE_ITERATIONS=1000;return function(inputString){var cacheKey=inputString;if(cacheKey in cache){return cache[cacheKey];}var expressions=[];var parseIterations=0;while(inputString){if(++parseIterations>MAX_PARSE_ITERATIONS){inputString='';break;}var expressionParseResult=parseExpression(inputString);var expression=expressionParseResult.nodes[0];if(expression==null||expression.terms.length===0){break;}expressions.push(expression);inputString=expressionParseResult.remainingInput;}return cache[cacheKey]=expressions;};}();var parseExpression=function(){var IS_IDENT_RE=/^(\-\-|[a-z\u0240-\uffff])/i;var IS_OPERATOR_RE=/^([\*\+\/]|[\-]\s)/i;var IS_EXPRESSION_END_RE=/^[\),]/;var FUNCTION_ARGUMENTS_FIRST_TOKEN='(';var HEX_FIRST_TOKEN='#';return function(inputString){var terms=[];while(inputString.length){inputString=inputString.trim();if(IS_EXPRESSION_END_RE.test(inputString)){break;}else if(inputString[0]===FUNCTION_ARGUMENTS_FIRST_TOKEN){var _parseFunctionArgumen=parseFunctionArguments(inputString),nodes=_parseFunctionArgumen.nodes,remainingInput=_parseFunctionArgumen.remainingInput;inputString=remainingInput;terms.push({type:'function',name:{type:'ident',value:'calc'},arguments:nodes});}else if(IS_IDENT_RE.test(inputString)){var identParseResult=parseIdent(inputString);var _identNode=identParseResult.nodes[0];inputString=identParseResult.remainingInput;if(inputString[0]===FUNCTION_ARGUMENTS_FIRST_TOKEN){var _parseFunctionArgumen2=parseFunctionArguments(inputString),_nodes=_parseFunctionArgumen2.nodes,_remainingInput=_parseFunctionArgumen2.remainingInput;terms.push({type:'function',name:_identNode,arguments:_nodes});inputString=_remainingInput;}else{terms.push(_identNode);}}else if(IS_OPERATOR_RE.test(inputString)){terms.push({type:'operator',value:inputString[0]});inputString=inputString.slice(1);}else{var _ref=inputString[0]===HEX_FIRST_TOKEN?parseHex(inputString):parseNumber(inputString),_nodes2=_ref.nodes,_remainingInput2=_ref.remainingInput;if(_nodes2.length===0){break;}terms.push(_nodes2[0]);inputString=_remainingInput2;}}return{nodes:[{type:'expression',terms:terms}],remainingInput:inputString};};}();var parseIdent=function(){var NOT_IDENT_RE=/[^a-z^0-9^_^\-^\u0240-\uffff]/i;return function(inputString){var match=inputString.match(NOT_IDENT_RE);var ident=match==null?inputString:inputString.substr(0,match.index);var remainingInput=match==null?'':inputString.substr(match.index);return{nodes:[{type:'ident',value:ident}],remainingInput:remainingInput};};}();var parseNumber=function(){var NOT_VALUE_RE=/[^0-9\.\-]|$/;var UNIT_RE=/^[a-z%]+/i;var ALLOWED_UNITS=/^(m|mm|cm|rad|deg|[%])$/;return function(inputString){var notValueMatch=inputString.match(NOT_VALUE_RE);var value=notValueMatch==null?inputString:inputString.substr(0,notValueMatch.index);inputString=notValueMatch==null?inputString:inputString.slice(notValueMatch.index);var unitMatch=inputString.match(UNIT_RE);var unit=unitMatch!=null&&unitMatch[0]!==''?unitMatch[0]:null;var remainingInput=unitMatch==null?inputString:inputString.slice(unit.length);if(unit!=null&&!ALLOWED_UNITS.test(unit)){unit=null;}return{nodes:[{type:'number',number:parseFloat(value)||0,unit:unit}],remainingInput:remainingInput};};}();var parseHex=function(){var HEX_RE=/^[a-f0-9]*/i;return function(inputString){inputString=inputString.slice(1).trim();var hexMatch=inputString.match(HEX_RE);var nodes=hexMatch==null?[]:[{type:'hex',value:hexMatch[0]}];return{nodes:nodes,remainingInput:hexMatch==null?inputString:inputString.slice(hexMatch[0].length)};};}();var parseFunctionArguments=function parseFunctionArguments(inputString){var expressionNodes=[];inputString=inputString.slice(1).trim();while(inputString.length){var expressionParseResult=parseExpression(inputString);expressionNodes.push(expressionParseResult.nodes[0]);inputString=expressionParseResult.remainingInput.trim();if(inputString[0]===','){inputString=inputString.slice(1).trim();}else if(inputString[0]===')'){inputString=inputString.slice(1);break;}}return{nodes:expressionNodes,remainingInput:inputString};};var $visitedTypes=Symbol('visitedTypes');var ASTWalker=/*#__PURE__*/function(){function ASTWalker(visitedTypes){_classCallCheck(this,ASTWalker);this[$visitedTypes]=visitedTypes;}_createClass(ASTWalker,[{key:"walk",value:function walk(ast,callback){var remaining=ast.slice();while(remaining.length){var next=remaining.shift();if(this[$visitedTypes].indexOf(next.type)>-1){callback(next);}switch(next.type){case'expression':remaining.unshift.apply(remaining,_toConsumableArray(next.terms));break;case'function':remaining.unshift.apply(remaining,[next.name].concat(_toConsumableArray(next.arguments)));break;}}}}]);return ASTWalker;}();var ZERO=Object.freeze({type:'number',number:0,unit:null});var elementFromLocalPoint=function elementFromLocalPoint(document,x,y){var host=document===window.document?window.document.body:document.host;var actualDocument=window.ShadyCSS?window.document:document;var boundingRect=host.getBoundingClientRect();return actualDocument.elementFromPoint(boundingRect.left+x,boundingRect.top+y);};var pickShadowDescendant=function pickShadowDescendant(element){var x=arguments.length>1&&arguments[1]!==undefined?arguments[1]:0;var y=arguments.length>2&&arguments[2]!==undefined?arguments[2]:0;return element.shadowRoot!=null?elementFromLocalPoint(element.shadowRoot,x,y):null;};var timePasses=function timePasses(){var ms=arguments.length>0&&arguments[0]!==undefined?arguments[0]:0;return new Promise(function(resolve){return setTimeout(resolve,ms);});};var until=/*#__PURE__*/function(){var _ref2=_asyncToGenerator(/*#__PURE__*/regeneratorRuntime.mark(function _callee(predicate){return regeneratorRuntime.wrap(function _callee$(_context2){while(1){switch(_context2.prev=_context2.next){case 0:if(predicate()){_context2.next=5;break;}_context2.next=3;return timePasses();case 3:_context2.next=0;break;case 5:case"end":return _context2.stop();}}},_callee);}));return function until(_x2){return _ref2.apply(this,arguments);};}();var rafPasses=function rafPasses(){return new Promise(function(resolve){return requestAnimationFrame(function(){return resolve();});});};var textureMatchesMeta=function textureMatchesMeta(texture,meta){return!!(texture&&texture.userData&&Object.keys(meta).reduce(function(matches,key){return matches&&meta[key]===texture.userData[key];},true));};var waitForEvent=function waitForEvent(target,eventName){var predicate=arguments.length>2&&arguments[2]!==undefined?arguments[2]:null;return new Promise(function(resolve){function handler(event){if(!predicate||predicate(event)){resolve(event);target.removeEventListener(eventName,handler);}}target.addEventListener(eventName,handler);});};var dispatchSyntheticEvent=function dispatchSyntheticEvent(target,type){var properties=arguments.length>2&&arguments[2]!==undefined?arguments[2]:{clientX:0,clientY:0,deltaY:1.0};var event=new CustomEvent(type,{cancelable:true,bubbles:true});Object.assign(event,properties);target.dispatchEvent(event);return event;};var ASSETS_DIRECTORY='../examples/assets/';var assetPath=function assetPath(name){return deserializeUrl("".concat(ASSETS_DIRECTORY).concat(name));};var isInDocumentTree=function isInDocumentTree(node){var root=node.getRootNode();while(root!==node&&root!=null){if(root.nodeType===Node.DOCUMENT_NODE){return root===document;}root=root.host&&root.host.getRootNode();}return false;};var spy=function spy(object,property,descriptor){var sourcePrototype=object;while(sourcePrototype!=null&&!sourcePrototype.hasOwnProperty(property)){sourcePrototype=sourcePrototype.__proto__;}if(sourcePrototype==null){throw new Error("Cannnot spy property \"".concat(property,"\" on ").concat(object));}var originalDescriptor=Object.getOwnPropertyDescriptor(sourcePrototype,property);if(originalDescriptor==null){throw new Error("Cannot read descriptor of \"".concat(property,"\" on ").concat(object));}Object.defineProperty(sourcePrototype,property,descriptor);return function(){Object.defineProperty(sourcePrototype,property,originalDescriptor);};};var expressionNode=function expressionNode(terms){return{type:'expression',terms:terms};};var hexNode=function hexNode(value){return{type:'hex',value:value};};var identNode=function identNode(value){return{type:'ident',value:value};};var operatorNode=function operatorNode(value){return{type:'operator',value:value};};var functionNode=function functionNode(name,args){return{type:'function',name:identNode(name),arguments:args};};var expect$1=chai.expect;suite('parsers',function(){suite('parseExpressions',function(){test('parses single numbers',function(){expect$1(parseExpressions('123rad')).to.be.eql([expressionNode([numberNode(123,'rad')])]);});test('parses number tuples',function(){expect$1(parseExpressions('123rad 3.14deg -1m 2cm')).to.be.eql([expressionNode([numberNode(123,'rad'),numberNode(3.14,'deg'),numberNode(-1,'m'),numberNode(2,'cm')])]);});test('parses hex colors',function(){expect$1(parseExpressions('#fff')).to.be.eql([expressionNode([hexNode('fff')])]);expect$1(parseExpressions('#abc123')).to.be.eql([expressionNode([hexNode('abc123')])]);expect$1(parseExpressions('#daf012ee')).to.be.eql([expressionNode([hexNode('daf012ee')])]);});test('parses functions',function(){expect$1(parseExpressions('rgba(255, 123, 0, 0.25)')).to.be.eql([expressionNode([functionNode('rgba',[expressionNode([numberNode(255,null)]),expressionNode([numberNode(123,null)]),expressionNode([numberNode(0,null)]),expressionNode([numberNode(0.25,null)])])])]);});test('parses nested functions',function(){expect$1(parseExpressions('rgba(255, calc(100 + var(--blue)), 0, 0.25)')).to.be.eql([expressionNode([functionNode('rgba',[expressionNode([numberNode(255,null)]),expressionNode([functionNode('calc',[expressionNode([numberNode(100,null),operatorNode('+'),functionNode('var',[expressionNode([identNode('--blue')])])])])]),expressionNode([numberNode(0,null)]),expressionNode([numberNode(0.25,null)])])])]);});test('parses calc algebra',function(){expect$1(parseExpressions('1m - -2rad / 3 + 4deg * -10.5')).to.be.eql([expressionNode([numberNode(1,'m'),operatorNode('-'),numberNode(-2,'rad'),operatorNode('/'),numberNode(3,null),operatorNode('+'),numberNode(4,'deg'),operatorNode('*'),numberNode(-10.5,null)])]);});suite('failure cases',function(){suite('mismatched parens',function(){test('trailing paren is gracefully dropped',function(){expect$1(parseExpressions('calc(calc(123)))')).to.be.eql([expressionNode([functionNode('calc',[expressionNode([functionNode('calc',[expressionNode([numberNode(123,null)])])])])])]);});});});});suite('ASTWalker',function(){test('only walks configured node types',function(){var astWalker=new ASTWalker(['number','ident']);var ast=parseExpressions('calc(123 + var(--size))');var visitedNodes=0;astWalker.walk(ast,function(node){expect$1(node.type==='number'||node.type==='ident').to.be.true;visitedNodes++;});expect$1(visitedNodes).to.be.equal(4);});});});var degreesToRadians=function degreesToRadians(numberNode$$1){var fallbackRadianValue=arguments.length>1&&arguments[1]!==undefined?arguments[1]:0;var number=numberNode$$1.number,unit=numberNode$$1.unit;if(!isFinite(number)){number=fallbackRadianValue;unit='rad';}else if(numberNode$$1.unit==='rad'||numberNode$$1.unit==null){return numberNode$$1;}var valueIsDegrees=unit==='deg'&&number!=null;var value=valueIsDegrees?number:0;var radians=value*Math.PI/180;return{type:'number',number:radians,unit:'rad'};};var radiansToDegrees=function radiansToDegrees(numberNode$$1){var fallbackDegreeValue=arguments.length>1&&arguments[1]!==undefined?arguments[1]:0;var number=numberNode$$1.number,unit=numberNode$$1.unit;if(!isFinite(number)){number=fallbackDegreeValue;unit='deg';}else if(numberNode$$1.unit==='deg'){return numberNode$$1;}var valueIsRadians=(unit===null||unit==='rad')&&number!=null;var value=valueIsRadians?number:0;var degrees=value*180/Math.PI;return{type:'number',number:degrees,unit:'deg'};};var lengthToBaseMeters=function lengthToBaseMeters(numberNode$$1){var fallbackMeterValue=arguments.length>1&&arguments[1]!==undefined?arguments[1]:0;var number=numberNode$$1.number,unit=numberNode$$1.unit;if(!isFinite(number)){number=fallbackMeterValue;unit='m';}else if(numberNode$$1.unit==='m'){return numberNode$$1;}var scale;switch(unit){default:scale=1;break;case'cm':scale=1/100;break;case'mm':scale=1/1000;break;}var value=scale*number;return{type:'number',number:value,unit:'m'};};var normalizeUnit=function(){var identity=function identity(node){return node;};var unitNormalizers={'rad':identity,'deg':degreesToRadians,'m':identity,'mm':lengthToBaseMeters,'cm':lengthToBaseMeters};return function(node){var fallback=arguments.length>1&&arguments[1]!==undefined?arguments[1]:ZERO;var number=node.number,unit=node.unit;if(!isFinite(number)){number=fallback.number;unit=fallback.unit;}if(unit==null){return node;}var normalize=unitNormalizers[unit];if(normalize==null){return fallback;}return normalize(node);};}();var expect$2=chai.expect;suite('conversions',function(){suite('degreesToRadians',function(){test('converts a number expressed in degrees to radians',function(){expect$2(degreesToRadians(numberNode(180,'deg'))).to.be.eql(numberNode(Math.PI,'rad'));});test('passes through numbers expressed in radians',function(){expect$2(degreesToRadians(numberNode(1,'rad'))).to.be.eql(numberNode(1,'rad'));});test('passes through numbers without a unit',function(){expect$2(degreesToRadians(numberNode(1,null))).to.be.eql(numberNode(1,null));});});suite('radiansToDegrees',function(){test('converts a number expressed in radians to degrees',function(){expect$2(radiansToDegrees(numberNode(Math.PI,'rad'))).to.be.eql(numberNode(180,'deg'));});test('passes through numbers expressed in degrees',function(){expect$2(radiansToDegrees(numberNode(1,'deg'))).to.be.eql(numberNode(1,'deg'));});test('treats numbers without a unit as radians',function(){expect$2(radiansToDegrees(numberNode(Math.PI,null))).to.be.eql(numberNode(180,'deg'));});});suite('lengthToBaseMeters',function(){test('passes through numbers expressed in base meters',function(){expect$2(lengthToBaseMeters(numberNode(1,'m'))).to.be.eql(numberNode(1,'m'));});test('converts numbers expressed in centimeters to base meters',function(){expect$2(lengthToBaseMeters(numberNode(123,'cm'))).to.be.eql(numberNode(1.23,'m'));});test('converts numbers expressed in millimeters to base meters',function(){expect$2(lengthToBaseMeters(numberNode(1234,'mm'))).to.be.eql(numberNode(1.234,'m'));});});suite('normalizeUnit',function(){test('normalizes angles to radians',function(){expect$2(normalizeUnit(numberNode(180,'deg'))).to.be.eql(numberNode(Math.PI,'rad'));expect$2(normalizeUnit(numberNode(180,'rad'))).to.be.eql(numberNode(180,'rad'));});test('normalizes lengths to base meters',function(){expect$2(normalizeUnit(numberNode(1,'m'))).to.be.eql(numberNode(1,'m'));expect$2(normalizeUnit(numberNode(1000,'mm'))).to.be.eql(numberNode(1,'m'));});});});var enumerationDeserializer=function enumerationDeserializer(allowedNames){return function(valueString){try{var expressions=parseExpressions(valueString);var names=(expressions.length?expressions[0].terms:[]).filter(function(valueNode){return valueNode&&valueNode.type==='ident';}).map(function(valueNode){return valueNode.value;}).filter(function(name){return allowedNames.indexOf(name)>-1;});var result=new Set();var _iteratorNormalCompletion2=true;var _didIteratorError2=false;var _iteratorError2=undefined;try{for(var _iterator2=names[Symbol.iterator](),_step2;!(_iteratorNormalCompletion2=(_step2=_iterator2.next()).done);_iteratorNormalCompletion2=true){var name=_step2.value;result.add(name);}}catch(err){_didIteratorError2=true;_iteratorError2=err;}finally{try{if(!_iteratorNormalCompletion2&&_iterator2.return!=null){_iterator2.return();}}finally{if(_didIteratorError2){throw _iteratorError2;}}}return result;}catch(_error){}return new Set();};};var expect$3=chai.expect;suite('deserializers',function(){suite('enumerationDeserializer',function(){var animals;var deserializeAnimals;setup(function(){animals=['elephant','octopus','chinchilla'];deserializeAnimals=enumerationDeserializer(animals);});test('yields the members of the enumeration in the input string',function(){var deserialized=deserializeAnimals('elephant chinchilla');expect$3(deserialized.size).to.be.equal(2);expect$3(deserialized.has('elephant')).to.be.true;expect$3(deserialized.has('chinchilla')).to.be.true;});test('filters out non-members of the enumeration',function(){var deserialized=deserializeAnimals('octopus paris');expect$3(deserialized.size).to.be.equal(1);expect$3(deserialized.has('octopus')).to.be.true;});test('yields an empty set from null input',function(){var deserialized=deserializeAnimals(null);expect$3(deserialized.size).to.be.equal(0);});});});var _a,_b,_c;var $evaluate=Symbol('evaluate');var $lastValue=Symbol('lastValue');var Evaluator=/*#__PURE__*/function(){function Evaluator(){_classCallCheck(this,Evaluator);this[_a]=null;}_createClass(Evaluator,[{key:"evaluate",value:function evaluate(){if(!this.isConstant||this[$lastValue]==null){this[$lastValue]=this[$evaluate]();}return this[$lastValue];}},{key:"isConstant",get:function get(){return false;}}],[{key:"evaluatableFor",value:function evaluatableFor(node){var basis=arguments.length>1&&arguments[1]!==undefined?arguments[1]:ZERO;if(_instanceof(node,Evaluator)){return node;}if(node.type==='number'){if(node.unit==='%'){return new PercentageEvaluator(node,basis);}return node;}switch(node.name.value){case'calc':return new CalcEvaluator(node,basis);case'env':return new EnvEvaluator(node);}return ZERO;}},{key:"evaluate",value:function evaluate(evaluatable){if(_instanceof(evaluatable,Evaluator)){return evaluatable.evaluate();}return evaluatable;}},{key:"isConstant",value:function isConstant(evaluatable){if(_instanceof(evaluatable,Evaluator)){return evaluatable.isConstant;}return true;}},{key:"applyIntrinsics",value:function applyIntrinsics(evaluated,intrinsics){var basis=intrinsics.basis,keywords=intrinsics.keywords;var auto=keywords.auto;return basis.map(function(basisNode,index){var autoSubstituteNode=auto[index]==null?basisNode:auto[index];var evaluatedNode=evaluated[index]?evaluated[index]:autoSubstituteNode;if(evaluatedNode.type==='ident'){var keyword=evaluatedNode.value;if(keyword in keywords){evaluatedNode=keywords[keyword][index];}}if(evaluatedNode==null||evaluatedNode.type==='ident'){evaluatedNode=autoSubstituteNode;}if(evaluatedNode.unit==='%'){return numberNode(evaluatedNode.number/100*basisNode.number,basisNode.unit);}evaluatedNode=normalizeUnit(evaluatedNode,basisNode);if(evaluatedNode.unit!==basisNode.unit){return basisNode;}return evaluatedNode;});}}]);return Evaluator;}();_a=$lastValue;var $percentage=Symbol('percentage');var $basis=Symbol('basis');var PercentageEvaluator=/*#__PURE__*/function(_Evaluator){_inherits(PercentageEvaluator,_Evaluator);function PercentageEvaluator(percentage,basis){var _this2;_classCallCheck(this,PercentageEvaluator);_this2=_possibleConstructorReturn(this,_getPrototypeOf(PercentageEvaluator).call(this));_this2[$percentage]=percentage;_this2[$basis]=basis;return _this2;}_createClass(PercentageEvaluator,[{key:$evaluate,value:function value(){return numberNode(this[$percentage].number/100*this[$basis].number,this[$basis].unit);}},{key:"isConstant",get:function get(){return true;}}]);return PercentageEvaluator;}(Evaluator);var $identNode=Symbol('identNode');var EnvEvaluator=/*#__PURE__*/function(_Evaluator2){_inherits(EnvEvaluator,_Evaluator2);function EnvEvaluator(envFunction){var _this3;_classCallCheck(this,EnvEvaluator);_this3=_possibleConstructorReturn(this,_getPrototypeOf(EnvEvaluator).call(this));_this3[_b]=null;var identNode=envFunction.arguments.length?envFunction.arguments[0].terms[0]:null;if(identNode!=null&&identNode.type==='ident'){_this3[$identNode]=identNode;}return _this3;}_createClass(EnvEvaluator,[{key:(_b=$identNode,$evaluate),value:function value(){if(this[$identNode]!=null){switch(this[$identNode].value){case'window-scroll-y':var verticalScrollPosition=window.pageYOffset;var verticalScrollMax=Math.max(document.body.scrollHeight,document.body.offsetHeight,document.documentElement.clientHeight,document.documentElement.scrollHeight,document.documentElement.offsetHeight);var scrollY=verticalScrollPosition/(verticalScrollMax-window.innerHeight)||0;return{type:'number',number:scrollY,unit:null};}}return ZERO;}},{key:"isConstant",get:function get(){return false;}}]);return EnvEvaluator;}(Evaluator);var IS_MULTIPLICATION_RE=/[\*\/]/;var $evaluator=Symbol('evalutor');var CalcEvaluator=/*#__PURE__*/function(_Evaluator3){_inherits(CalcEvaluator,_Evaluator3);function CalcEvaluator(calcFunction){var _this4;var basis=arguments.length>1&&arguments[1]!==undefined?arguments[1]:ZERO;_classCallCheck(this,CalcEvaluator);_this4=_possibleConstructorReturn(this,_getPrototypeOf(CalcEvaluator).call(this));_this4[_c]=null;if(calcFunction.arguments.length!==1){return _possibleConstructorReturn(_this4);}var terms=calcFunction.arguments[0].terms.slice();var secondOrderTerms=[];while(terms.length){var term=terms.shift();if(secondOrderTerms.length>0){var previousTerm=secondOrderTerms[secondOrderTerms.length-1];if(previousTerm.type==='operator'&&IS_MULTIPLICATION_RE.test(previousTerm.value)){var operator=secondOrderTerms.pop();var leftValue=secondOrderTerms.pop();if(leftValue==null){return _possibleConstructorReturn(_this4);}secondOrderTerms.push(new OperatorEvaluator(operator,Evaluator.evaluatableFor(leftValue,basis),Evaluator.evaluatableFor(term,basis)));continue;}}secondOrderTerms.push(term.type==='operator'?term:Evaluator.evaluatableFor(term,basis));}while(secondOrderTerms.length>2){var _secondOrderTerms$spl=secondOrderTerms.splice(0,3),_secondOrderTerms$spl2=_slicedToArray(_secondOrderTerms$spl,3),left=_secondOrderTerms$spl2[0],_operator=_secondOrderTerms$spl2[1],right=_secondOrderTerms$spl2[2];if(_operator.type!=='operator'){return _possibleConstructorReturn(_this4);}secondOrderTerms.unshift(new OperatorEvaluator(_operator,Evaluator.evaluatableFor(left,basis),Evaluator.evaluatableFor(right,basis)));}if(secondOrderTerms.length===1){_this4[$evaluator]=secondOrderTerms[0];}return _this4;}_createClass(CalcEvaluator,[{key:(_c=$evaluator,$evaluate),value:function value(){return this[$evaluator]!=null?Evaluator.evaluate(this[$evaluator]):ZERO;}},{key:"isConstant",get:function get(){return this[$evaluator]==null||Evaluator.isConstant(this[$evaluator]);}}]);return CalcEvaluator;}(Evaluator);var $operator=Symbol('operator');var $left=Symbol('left');var $right=Symbol('right');var OperatorEvaluator=/*#__PURE__*/function(_Evaluator4){_inherits(OperatorEvaluator,_Evaluator4);function OperatorEvaluator(operator,left,right){var _this5;_classCallCheck(this,OperatorEvaluator);_this5=_possibleConstructorReturn(this,_getPrototypeOf(OperatorEvaluator).call(this));_this5[$operator]=operator;_this5[$left]=left;_this5[$right]=right;return _this5;}_createClass(OperatorEvaluator,[{key:$evaluate,value:function value(){var leftNode=normalizeUnit(Evaluator.evaluate(this[$left]));var rightNode=normalizeUnit(Evaluator.evaluate(this[$right]));var leftValue=leftNode.number,leftUnit=leftNode.unit;var rightValue=rightNode.number,rightUnit=rightNode.unit;if(rightUnit!=null&&leftUnit!=n