1 files changed, 101 insertions, 0 deletions
diff --git a/bin/lib/less/tree/color.js b/bin/lib/less/tree/color.js
new file mode 100644
index 00000000..37ce1781
--- /dev/null
+++ b/bin/lib/less/tree/color.js
@@ -0,0 +1,101 @@
+(function (tree) {
+//
+// RGB Colors - #ff0014, #eee
+//
+tree.Color = function (rgb, a) {
+    //
+    // The end goal here, is to parse the arguments
+    // into an integer triplet, such as `128, 255, 0`
+    //
+    // This facilitates operations and conversions.
+    //
+    if (Array.isArray(rgb)) {
+        this.rgb = rgb;
+    } else if (rgb.length == 6) {
+        this.rgb = rgb.match(/.{2}/g).map(function (c) {
+            return parseInt(c, 16);
+        });
+    } else {
+        this.rgb = rgb.split('').map(function (c) {
+            return parseInt(c + c, 16);
+        });
+    }
+    this.alpha = typeof(a) === 'number' ? a : 1;
+};
+tree.Color.prototype = {
+    eval: function () { return this },
+
+    //
+    // If we have some transparency, the only way to represent it
+    // is via `rgba`. Otherwise, we use the hex representation,
+    // which has better compatibility with older browsers.
+    // Values are capped between `0` and `255`, rounded and zero-padded.
+    //
+    toCSS: function () {
+        if (this.alpha < 1.0) {
+            return "rgba(" + this.rgb.map(function (c) {
+                return Math.round(c);
+            }).concat(this.alpha).join(', ') + ")";
+        } else {
+            return '#' + this.rgb.map(function (i) {
+                i = Math.round(i);
+                i = (i > 255 ? 255 : (i < 0 ? 0 : i)).toString(16);
+                return i.length === 1 ? '0' + i : i;
+            }).join('');
+        }
+    },
+
+    //
+    // Operations have to be done per-channel, if not,
+    // channels will spill onto each other. Once we have
+    // our result, in the form of an integer triplet,
+    // we create a new Color node to hold the result.
+    //
+    operate: function (op, other) {
+        var result = [];
+
+        if (! (other instanceof tree.Color)) {
+            other = other.toColor();
+        }
+
+        for (var c = 0; c < 3; c++) {
+            result[c] = tree.operate(op, this.rgb[c], other.rgb[c]);
+        }
+        return new(tree.Color)(result, this.alpha + other.alpha);
+    },
+
+    toHSL: function () {
+        var r = this.rgb[0] / 255,
+            g = this.rgb[1] / 255,
+            b = this.rgb[2] / 255,
+            a = this.alpha;
+
+        var max = Math.max(r, g, b), min = Math.min(r, g, b);
+        var h, s, l = (max + min) / 2, d = max - min;
+
+        if (max === min) {
+            h = s = 0;
+        } else {
+            s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
+
+            switch (max) {
+                case r: h = (g - b) / d + (g < b ? 6 : 0); break;
+                case g: h = (b - r) / d + 2;               break;
+                case b: h = (r - g) / d + 4;               break;
+            }
+            h /= 6;
+        }
+        return { h: h * 360, s: s, l: l, a: a };
+    },
+    toARGB: function () {
+        var argb = [Math.round(this.alpha * 255)].concat(this.rgb);
+        return '#' + argb.map(function (i) {
+            i = Math.round(i);
+            i = (i > 255 ? 255 : (i < 0 ? 0 : i)).toString(16);
+            return i.length === 1 ? '0' + i : i;
+        }).join('');
+    }
+};
+
+
+})(require('../tree'));