1 files changed, 228 insertions, 0 deletions
diff --git a/bin/lib/less/functions.js b/bin/lib/less/functions.js
new file mode 100644
index 00000000..6eb34bac
--- /dev/null
+++ b/bin/lib/less/functions.js
@@ -0,0 +1,228 @@
+(function (tree) {
+
+tree.functions = {
+    rgb: function (r, g, b) {
+        return this.rgba(r, g, b, 1.0);
+    },
+    rgba: function (r, g, b, a) {
+        var rgb = [r, g, b].map(function (c) { return number(c) }),
+            a = number(a);
+        return new(tree.Color)(rgb, a);
+    },
+    hsl: function (h, s, l) {
+        return this.hsla(h, s, l, 1.0);
+    },
+    hsla: function (h, s, l, a) {
+        h = (number(h) % 360) / 360;
+        s = number(s); l = number(l); a = number(a);
+
+        var m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s;
+        var m1 = l * 2 - m2;
+
+        return this.rgba(hue(h + 1/3) * 255,
+                         hue(h)       * 255,
+                         hue(h - 1/3) * 255,
+                         a);
+
+        function hue(h) {
+            h = h < 0 ? h + 1 : (h > 1 ? h - 1 : h);
+            if      (h * 6 < 1) return m1 + (m2 - m1) * h * 6;
+            else if (h * 2 < 1) return m2;
+            else if (h * 3 < 2) return m1 + (m2 - m1) * (2/3 - h) * 6;
+            else                return m1;
+        }
+    },
+    hue: function (color) {
+        return new(tree.Dimension)(Math.round(color.toHSL().h));
+    },
+    saturation: function (color) {
+        return new(tree.Dimension)(Math.round(color.toHSL().s * 100), '%');
+    },
+    lightness: function (color) {
+        return new(tree.Dimension)(Math.round(color.toHSL().l * 100), '%');
+    },
+    alpha: function (color) {
+        return new(tree.Dimension)(color.toHSL().a);
+    },
+    saturate: function (color, amount) {
+        var hsl = color.toHSL();
+
+        hsl.s += amount.value / 100;
+        hsl.s = clamp(hsl.s);
+        return hsla(hsl);
+    },
+    desaturate: function (color, amount) {
+        var hsl = color.toHSL();
+
+        hsl.s -= amount.value / 100;
+        hsl.s = clamp(hsl.s);
+        return hsla(hsl);
+    },
+    lighten: function (color, amount) {
+        var hsl = color.toHSL();
+
+        hsl.l += amount.value / 100;
+        hsl.l = clamp(hsl.l);
+        return hsla(hsl);
+    },
+    darken: function (color, amount) {
+        var hsl = color.toHSL();
+
+        hsl.l -= amount.value / 100;
+        hsl.l = clamp(hsl.l);
+        return hsla(hsl);
+    },
+    fadein: function (color, amount) {
+        var hsl = color.toHSL();
+
+        hsl.a += amount.value / 100;
+        hsl.a = clamp(hsl.a);
+        return hsla(hsl);
+    },
+    fadeout: function (color, amount) {
+        var hsl = color.toHSL();
+
+        hsl.a -= amount.value / 100;
+        hsl.a = clamp(hsl.a);
+        return hsla(hsl);
+    },
+    fade: function (color, amount) {
+        var hsl = color.toHSL();
+
+        hsl.a = amount.value / 100;
+        hsl.a = clamp(hsl.a);
+        return hsla(hsl);
+    },
+    spin: function (color, amount) {
+        var hsl = color.toHSL();
+        var hue = (hsl.h + amount.value) % 360;
+
+        hsl.h = hue < 0 ? 360 + hue : hue;
+
+        return hsla(hsl);
+    },
+    //
+    // Copyright (c) 2006-2009 Hampton Catlin, Nathan Weizenbaum, and Chris Eppstein
+    // http://sass-lang.com
+    //
+    mix: function (color1, color2, weight) {
+        var p = weight.value / 100.0;
+        var w = p * 2 - 1;
+        var a = color1.toHSL().a - color2.toHSL().a;
+
+        var w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2.0;
+        var w2 = 1 - w1;
+
+        var rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2,
+                   color1.rgb[1] * w1 + color2.rgb[1] * w2,
+                   color1.rgb[2] * w1 + color2.rgb[2] * w2];
+
+        var alpha = color1.alpha * p + color2.alpha * (1 - p);
+
+        return new(tree.Color)(rgb, alpha);
+    },
+    greyscale: function (color) {
+        return this.desaturate(color, new(tree.Dimension)(100));
+    },
+    e: function (str) {
+        return new(tree.Anonymous)(str instanceof tree.JavaScript ? str.evaluated : str);
+    },
+    escape: function (str) {
+        return new(tree.Anonymous)(encodeURI(str.value).replace(/=/g, "%3D").replace(/:/g, "%3A").replace(/#/g, "%23").replace(/;/g, "%3B").replace(/\(/g, "%28").replace(/\)/g, "%29"));
+    },
+    '%': function (quoted /* arg, arg, ...*/) {
+        var args = Array.prototype.slice.call(arguments, 1),
+            str = quoted.value;
+
+        for (var i = 0; i < args.length; i++) {
+            str = str.replace(/%[sda]/i, function(token) {
+                var value = token.match(/s/i) ? args[i].value : args[i].toCSS();
+                return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value;
+            });
+        }
+        str = str.replace(/%%/g, '%');
+        return new(tree.Quoted)('"' + str + '"', str);
+    },
+    round: function (n) {
+        return this._math('round', n);
+    },
+    ceil: function (n) {
+        return this._math('ceil', n);
+    },
+    floor: function (n) {
+        return this._math('floor', n);
+    },
+    _math: function (fn, n) {
+        if (n instanceof tree.Dimension) {
+            return new(tree.Dimension)(Math[fn](number(n)), n.unit);
+        } else if (typeof(n) === 'number') {
+            return Math[fn](n);
+        } else {
+            throw { type: "Argument", message: "argument must be a number" };
+        }
+    },
+    argb: function (color) {
+        return new(tree.Anonymous)(color.toARGB());
+
+    },
+    percentage: function (n) {
+        return new(tree.Dimension)(n.value * 100, '%');
+    },
+    color: function (n) {
+        if (n instanceof tree.Quoted) {
+            return new(tree.Color)(n.value.slice(1));
+        } else {
+            throw { type: "Argument", message: "argument must be a string" };
+        }
+    },
+    iscolor: function (n) {
+        return this._isa(n, tree.Color);
+    },
+    isnumber: function (n) {
+        return this._isa(n, tree.Dimension);
+    },
+    isstring: function (n) {
+        return this._isa(n, tree.Quoted);
+    },
+    iskeyword: function (n) {
+        return this._isa(n, tree.Keyword);
+    },
+    isurl: function (n) {
+        return this._isa(n, tree.URL);
+    },
+    ispixel: function (n) {
+        return (n instanceof tree.Dimension) && n.unit === 'px' ? tree.True : tree.False;
+    },
+    ispercentage: function (n) {
+        return (n instanceof tree.Dimension) && n.unit === '%' ? tree.True : tree.False;
+    },
+    isem: function (n) {
+        return (n instanceof tree.Dimension) && n.unit === 'em' ? tree.True : tree.False;
+    },
+    _isa: function (n, Type) {
+        return (n instanceof Type) ? tree.True : tree.False;
+    }
+};
+
+function hsla(hsla) {
+    return tree.functions.hsla(hsla.h, hsla.s, hsla.l, hsla.a);
+}
+
+function number(n) {
+    if (n instanceof tree.Dimension) {
+        return parseFloat(n.unit == '%' ? n.value / 100 : n.value);
+    } else if (typeof(n) === 'number') {
+        return n;
+    } else {
+        throw {
+            error: "RuntimeError",
+            message: "color functions take numbers as parameters"
+        };
+    }
+}
+
+function clamp(val) {
+    return Math.min(1, Math.max(0, val));
+}
+
+})(require('./tree'));