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Functions "tint" and "shade" #634

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30 changes: 30 additions & 0 deletions lessc.inc.php
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Original file line number Diff line number Diff line change
Expand Up @@ -1199,6 +1199,36 @@ protected function lib_percentage($arg) {
return array("number", $num*100, "%");
}

// Mix color with white in variable proportion. It is the same as calling mix(#ffffff, @color, @weight)
// tint(@color, [@weight: 50%]);
// Returns: color
// http://lesscss.org/functions/#color-operations-tint
protected function lib_tint($args) {
$white = ['color', 255, 255, 255];
if ($args[0] == 'color') {
return $this->lib_mix([ 'list', ',', [$white, $args] ]);
} elseif ($args[0] == "list" && count($args[2]) == 2) {
return $this->lib_mix([ $args[0], $args[1], [$white, $args[2][0], $args[2][1]] ]);
} else {
$this->throwError("tint expects (color, weight)");
}
}

// Mix color with black in variable proportion. It is the same as calling mix(#000000, @color, @weight)
// shade(@color, [@weight: 50%]);
// Returns: color
// http://lesscss.org/functions/#color-operations-shade
protected function lib_shade($args) {
$black = ['color', 0, 0, 0];
if ($args[0] == 'color') {
return $this->lib_mix([ 'list', ',', [$black, $args] ]);
} elseif ($args[0] == "list" && count($args[2]) == 2) {
return $this->lib_mix([ $args[0], $args[1], [$black, $args[2][0], $args[2][1]] ]);
} else {
$this->throwError("tint expects (color, weight)");
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@theFeu theFeu Jan 9, 2018 •
edited
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"shade expects (color, weight)"

would probably be a better message ;)
but thanks a lot for saving me some time writing this :)

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@Krinkle Krinkle Oct 16, 2018

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Thanks, I've fixed this as part of the merge.

}
}

// mixes two colors by weight
// mix(@color1, @color2, [@weight: 50%]);
// http://sass-lang.com/docs/yardoc/Sass/Script/Functions.html#mix-instance_method
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5 changes: 5 additions & 0 deletions tests/inputs/colors.less
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Expand Up @@ -37,6 +37,11 @@ body {
two1: fadeout(#029f23, 10%);
two2: fadein(#029f23, -10%);

tint1: tint(#e0e0e0);
tint2: tint(#e0e0e0, 40%);

shade1: shade(#e0e0e0);
shade2: shade(#e0e0e0, 40%);

three1: fadein(rgba(1,2,3, 0.5), 10%);
three2: fadeout(rgba(1,2,3, 0.5), -10%);
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4 changes: 4 additions & 0 deletions tests/outputs/colors.css
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Expand Up @@ -26,6 +26,10 @@ body {
one2: #abcdef;
two1: rgba(2,159,35,0.9);
two2: rgba(2,159,35,0.9);
tint1: #f0f0f0;
tint2: #ececec;
shade1: #707070;
shade2: #868686;
three1: rgba(1,2,3,0.6);
three2: rgba(1,2,3,0.6);
four1: rgba(1,2,3,0);
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