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Add contrast function #488

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Add contrast function #488

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1f513a9
Add contrast function
Synchro Nov 24, 2011
4a081ad
Add LESS tests for contrast
Synchro Nov 24, 2011
5f593b5
Add CSS test results for contrast
Synchro Nov 24, 2011
dc71e71
Merge remote-tracking branch 'upstream/master' into contrast
Synchro Jan 10, 2012
32e4189
Add optional light and dark parameters
Synchro Jan 10, 2012
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16 changes: 16 additions & 0 deletions lib/less/functions.js
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Original file line number Diff line number Diff line change
Expand Up @@ -124,6 +124,22 @@ tree.functions = {
greyscale: function (color) {
return this.desaturate(color, new(tree.Dimension)(100));
},
contrast: function (color, light, dark) {
var hsl = color.toHSL();
if (arguments.length == 1) {
if (hsl.l > 0.5) {
return this.rgba(0, 0, 0, 1.0);
} else {
return this.rgba(255, 255, 255, 1.0);
}
} else if (arguments.length == 3) {
if (hsl.l > 0.5) {
return dark;
} else {
return light;
}
}
},
e: function (str) {
return new(tree.Anonymous)(str instanceof tree.JavaScript ? str.evaluated : str);
},
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4 changes: 4 additions & 0 deletions test/css/functions.css
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Expand Up @@ -14,6 +14,10 @@
greyscale: #2e2e2e;
spin-p: #bf6a40;
spin-n: #bf4055;
contrast-white: #000000;
contrast-black: #ffffff;
contrast-light: #111111;
contrast-dark: #eeeeee;
format: "rgb(32, 128, 64)";
format-string: "hello world";
format-multiple: "hello earth 2";
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4 changes: 4 additions & 0 deletions test/less/functions.less
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Expand Up @@ -17,6 +17,10 @@
greyscale: greyscale(#203c31);
spin-p: spin(hsl(340, 50%, 50%), 40);
spin-n: spin(hsl(30, 50%, 50%), -40);
contrast-white: contrast(#fff);
contrast-black: contrast(#000);
contrast-light: contrast(#fff, #eeeeee, #111111);
contrast-dark: contrast(#000, #eeeeee, #111111);
format: %("rgb(%d, %d, %d)", @r, 128, 64);
format-string: %("hello %s", "world");
format-multiple: %("hello %s %d", "earth", 2);
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