Current File : /www/specpages-backup/node_modules/less/lib/less/tree/call.js.map
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Node from './node';\nimport Anonymous from './anonymous';\nimport FunctionCaller from '../functions/function-caller';\n\n//\n// A function call node.\n//\nconst Call = function(name, args, index, currentFileInfo) {\n this.name = name;\n this.args = args;\n this.calc = name === 'calc';\n this._index = index;\n this._fileInfo = currentFileInfo;\n}\n\nCall.prototype = new Node();\n\nCall.prototype.accept = function(visitor) {\n if (this.args) {\n this.args = visitor.visitArray(this.args);\n }\n};\n\n//\n// When evaluating a function call,\n// we either find the function in the functionRegistry,\n// in which case we call it, passing the evaluated arguments,\n// if this returns null or we cannot find the function, we\n// simply print it out as it appeared originally [2].\n//\n// The reason why we evaluate the arguments, is in the case where\n// we try to pass a variable to a function, like: `saturate(@color)`.\n// The function should receive the value, not the variable.\n//\nCall.prototype.eval = function(context) {\n /**\n * Turn off math for calc(), and switch back on for evaluating nested functions\n */\n const currentMathContext = context.mathOn;\n context.mathOn = !this.calc;\n if (this.calc || context.inCalc) {\n context.enterCalc();\n }\n\n const exitCalc = () => {\n if (this.calc || context.inCalc) {\n context.exitCalc();\n }\n context.mathOn = currentMathContext;\n };\n\n let result;\n const funcCaller = new FunctionCaller(this.name, context, this.getIndex(), this.fileInfo());\n\n if (funcCaller.isValid()) {\n try {\n result = funcCaller.call(this.args);\n exitCalc();\n } catch (e) {\n if (e.hasOwnProperty('line') && e.hasOwnProperty('column')) {\n throw e\n }\n throw { \n type: e.type || 'Runtime',\n message: `error evaluating function \\`${this.name}\\`${e.message ? `: ${e.message}` : ''}`,\n index: this.getIndex(), \n filename: this.fileInfo().filename,\n line: e.lineNumber,\n column: e.columnNumber\n };\n }\n\n if (result !== null && result !== undefined) {\n // Results that that are not nodes are cast as Anonymous nodes\n // Falsy values or booleans are returned as empty nodes\n if (!(result instanceof Node)) {\n if (!result || result === true) {\n result = new Anonymous(null); \n }\n else {\n result = new Anonymous(result.toString()); \n }\n \n }\n result._index = this._index;\n result._fileInfo = this._fileInfo;\n return result;\n }\n }\n\n const args = this.args.map(a => a.eval(context));\n exitCalc();\n\n return new Call(this.name, args, this.getIndex(), this.fileInfo());\n};\n\nCall.prototype.genCSS = function(context, output) {\n output.add(`${this.name}(`, this.fileInfo(), this.getIndex());\n\n for (let i = 0; i < this.args.length; i++) {\n this.args[i].genCSS(context, output);\n if (i + 1 < this.args.length) {\n output.add(', ');\n }\n }\n\n output.add(')');\n};\n\nCall.prototype.type = 'Call';\nexport default Call;\n"]}
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