40 lines
1.3 KiB
JavaScript
40 lines
1.3 KiB
JavaScript
if (typeof(require) !== 'undefined') { var tree = require('less/tree') }
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//
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// A function call node.
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//
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tree.Call = function Call(name, args) {
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this.name = name;
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this.args = args;
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};
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tree.Call.prototype = {
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//
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// When evaluating a function call,
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// we either find the function in `tree.functions` [1],
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// in which case we call it, passing the evaluated arguments,
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// or we simply print it out as it appeared originally [2].
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//
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// The *functions.js* file contains the built-in functions.
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//
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// The reason why we evaluate the arguments, is in the case where
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// we try to pass a variable to a function, like: `saturate(@color)`.
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// The function should receive the value, not the variable.
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//
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eval: function (env) {
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if (this._value) return this._value;
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var args = this.args.map(function (a) { return a.eval(env) });
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if (this.name in tree.functions) { // 1.
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return this._value = tree.functions[this.name].apply(tree.functions, args);
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} else { // 2.
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return this._value = new(tree.Anonymous)(this.name +
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"(" + args.map(function (a) { return a.toCSS() }).join(', ') + ")");
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}
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},
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toCSS: function (env) {
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return this.eval(env).toCSS();
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}
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};
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