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diff --git a/vendor/wikimedia/less.php/lib/Less/Functions.php b/vendor/wikimedia/less.php/lib/Less/Functions.php
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+++ b/vendor/wikimedia/less.php/lib/Less/Functions.php
@@ -0,0 +1,1222 @@
+<?php
+
+/**
+ * Builtin functions
+ * @see https://lesscss.org/functions/
+ */
+class Less_Functions {
+
+ public $env;
+ public $currentFileInfo;
+
+ function __construct( $env, array $currentFileInfo = null ) {
+ $this->env = $env;
+ $this->currentFileInfo = $currentFileInfo;
+ }
+
+ /**
+ * @param string $op
+ * @param float $a
+ * @param float $b
+ */
+ public static function operate( $op, $a, $b ) {
+ switch ( $op ) {
+ case '+':
+ return $a + $b;
+ case '-':
+ return $a - $b;
+ case '*':
+ return $a * $b;
+ case '/':
+ return $a / $b;
+ }
+ }
+
+ public static function clamp( $val, $max = 1 ) {
+ return min( max( $val, 0 ), $max );
+ }
+
+ public static function fround( $value ) {
+ if ( $value === 0 ) {
+ return $value;
+ }
+
+ if ( Less_Parser::$options['numPrecision'] ) {
+ $p = pow( 10, Less_Parser::$options['numPrecision'] );
+ return round( $value * $p ) / $p;
+ }
+ return $value;
+ }
+
+ public static function number( $n ) {
+ if ( $n instanceof Less_Tree_Dimension ) {
+ return floatval( $n->unit->is( '%' ) ? $n->value / 100 : $n->value );
+ } elseif ( is_numeric( $n ) ) {
+ return $n;
+ } else {
+ throw new Less_Exception_Compiler( "color functions take numbers as parameters" );
+ }
+ }
+
+ public static function scaled( $n, $size = 255 ) {
+ if ( $n instanceof Less_Tree_Dimension && $n->unit->is( '%' ) ) {
+ return (float)$n->value * $size / 100;
+ } else {
+ return self::number( $n );
+ }
+ }
+
+ public function rgb( $r = null, $g = null, $b = null ) {
+ if ( $r === null || $g === null || $b === null ) {
+ throw new Less_Exception_Compiler( "rgb expects three parameters" );
+ }
+ return $this->rgba( $r, $g, $b, 1.0 );
+ }
+
+ public function rgba( $r = null, $g = null, $b = null, $a = null ) {
+ $rgb = [ $r, $g, $b ];
+ $rgb = array_map( [ 'Less_Functions','scaled' ], $rgb );
+
+ $a = self::number( $a );
+ return new Less_Tree_Color( $rgb, $a );
+ }
+
+ public function hsl( $h, $s, $l ) {
+ return $this->hsla( $h, $s, $l, 1.0 );
+ }
+
+ public function hsla( $h, $s, $l, $a ) {
+ $h = fmod( self::number( $h ), 360 ) / 360; // Classic % operator will change float to int
+ $s = self::clamp( self::number( $s ) );
+ $l = self::clamp( self::number( $l ) );
+ $a = self::clamp( self::number( $a ) );
+
+ $m2 = $l <= 0.5 ? $l * ( $s + 1 ) : $l + $s - $l * $s;
+
+ $m1 = $l * 2 - $m2;
+
+ return $this->rgba(
+ self::hsla_hue( $h + 1 / 3, $m1, $m2 ) * 255,
+ self::hsla_hue( $h, $m1, $m2 ) * 255,
+ self::hsla_hue( $h - 1 / 3, $m1, $m2 ) * 255,
+ $a
+ );
+ }
+
+ /**
+ * @param float $h
+ * @param float $m1
+ * @param float $m2
+ */
+ public function hsla_hue( $h, $m1, $m2 ) {
+ $h = $h < 0 ? $h + 1 : ( $h > 1 ? $h - 1 : $h );
+ if ( $h * 6 < 1 ) {
+ return $m1 + ( $m2 - $m1 ) * $h * 6;
+ } elseif ( $h * 2 < 1 ) {
+ return $m2;
+ } elseif ( $h * 3 < 2 ) {
+ return $m1 + ( $m2 - $m1 ) * ( 2 / 3 - $h ) * 6;
+ } else {
+ return $m1;
+ }
+ }
+
+ public function hsv( $h, $s, $v ) {
+ return $this->hsva( $h, $s, $v, 1.0 );
+ }
+
+ /**
+ * @param Less_Tree|float $h
+ * @param Less_Tree|float $s
+ * @param Less_Tree|float $v
+ * @param float $a
+ */
+ public function hsva( $h, $s, $v, $a ) {
+ $h = ( ( self::number( $h ) % 360 ) / 360 ) * 360;
+ $s = self::number( $s );
+ $v = self::number( $v );
+ $a = self::number( $a );
+
+ $i = floor( (int)( $h / 60 ) % 6 );
+ $f = ( $h / 60 ) - $i;
+
+ $vs = [
+ $v,
+ $v * ( 1 - $s ),
+ $v * ( 1 - $f * $s ),
+ $v * ( 1 - ( 1 - $f ) * $s )
+ ];
+
+ $perm = [
+ [ 0, 3, 1 ],
+ [ 2, 0, 1 ],
+ [ 1, 0, 3 ],
+ [ 1, 2, 0 ],
+ [ 3, 1, 0 ],
+ [ 0, 1, 2 ]
+ ];
+
+ return $this->rgba(
+ $vs[$perm[$i][0]] * 255,
+ $vs[$perm[$i][1]] * 255,
+ $vs[$perm[$i][2]] * 255,
+ $a
+ );
+ }
+
+ public function hue( $color = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to hue must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $c = $color->toHSL();
+ return new Less_Tree_Dimension( Less_Parser::round( $c['h'] ) );
+ }
+
+ public function saturation( $color = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to saturation must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $c = $color->toHSL();
+ return new Less_Tree_Dimension( Less_Parser::round( $c['s'] * 100 ), '%' );
+ }
+
+ public function lightness( $color = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to lightness must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $c = $color->toHSL();
+ return new Less_Tree_Dimension( Less_Parser::round( $c['l'] * 100 ), '%' );
+ }
+
+ public function hsvhue( $color = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to hsvhue must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $hsv = $color->toHSV();
+ return new Less_Tree_Dimension( Less_Parser::round( $hsv['h'] ) );
+ }
+
+ public function hsvsaturation( $color = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to hsvsaturation must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $hsv = $color->toHSV();
+ return new Less_Tree_Dimension( Less_Parser::round( $hsv['s'] * 100 ), '%' );
+ }
+
+ public function hsvvalue( $color = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to hsvvalue must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $hsv = $color->toHSV();
+ return new Less_Tree_Dimension( Less_Parser::round( $hsv['v'] * 100 ), '%' );
+ }
+
+ public function red( $color = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to red must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ return new Less_Tree_Dimension( $color->rgb[0] );
+ }
+
+ public function green( $color = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to green must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ return new Less_Tree_Dimension( $color->rgb[1] );
+ }
+
+ public function blue( $color = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to blue must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ return new Less_Tree_Dimension( $color->rgb[2] );
+ }
+
+ public function alpha( $color = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to alpha must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $c = $color->toHSL();
+ return new Less_Tree_Dimension( $c['a'] );
+ }
+
+ public function luma( $color = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to luma must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ return new Less_Tree_Dimension( Less_Parser::round( $color->luma() * $color->alpha * 100 ), '%' );
+ }
+
+ public function luminance( $color = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to luminance must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $luminance =
+ ( 0.2126 * $color->rgb[0] / 255 )
+ + ( 0.7152 * $color->rgb[1] / 255 )
+ + ( 0.0722 * $color->rgb[2] / 255 );
+
+ return new Less_Tree_Dimension( Less_Parser::round( $luminance * $color->alpha * 100 ), '%' );
+ }
+
+ public function saturate( $color = null, $amount = null ) {
+ // filter: saturate(3.2);
+ // should be kept as is, so check for color
+ if ( $color instanceof Less_Tree_Dimension ) {
+ return null;
+ }
+
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to saturate must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$amount instanceof Less_Tree_Dimension ) {
+ throw new Less_Exception_Compiler( 'The second argument to saturate must be a percentage' . ( $amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $hsl = $color->toHSL();
+
+ $hsl['s'] += $amount->value / 100;
+ $hsl['s'] = self::clamp( $hsl['s'] );
+
+ return $this->hsla( $hsl['h'], $hsl['s'], $hsl['l'], $hsl['a'] );
+ }
+
+ /**
+ * @param Less_Tree_Color|null $color
+ * @param Less_Tree_Dimension|null $amount
+ */
+ public function desaturate( $color = null, $amount = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to desaturate must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$amount instanceof Less_Tree_Dimension ) {
+ throw new Less_Exception_Compiler( 'The second argument to desaturate must be a percentage' . ( $amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $hsl = $color->toHSL();
+ $hsl['s'] -= $amount->value / 100;
+ $hsl['s'] = self::clamp( $hsl['s'] );
+
+ return $this->hsla( $hsl['h'], $hsl['s'], $hsl['l'], $hsl['a'] );
+ }
+
+ public function lighten( $color = null, $amount = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to lighten must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$amount instanceof Less_Tree_Dimension ) {
+ throw new Less_Exception_Compiler( 'The second argument to lighten must be a percentage' . ( $amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $hsl = $color->toHSL();
+
+ $hsl['l'] += $amount->value / 100;
+ $hsl['l'] = self::clamp( $hsl['l'] );
+
+ return $this->hsla( $hsl['h'], $hsl['s'], $hsl['l'], $hsl['a'] );
+ }
+
+ public function darken( $color = null, $amount = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to darken must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$amount instanceof Less_Tree_Dimension ) {
+ throw new Less_Exception_Compiler( 'The second argument to darken must be a percentage' . ( $amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $hsl = $color->toHSL();
+ $hsl['l'] -= $amount->value / 100;
+ $hsl['l'] = self::clamp( $hsl['l'] );
+
+ return $this->hsla( $hsl['h'], $hsl['s'], $hsl['l'], $hsl['a'] );
+ }
+
+ public function fadein( $color = null, $amount = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to fadein must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$amount instanceof Less_Tree_Dimension ) {
+ throw new Less_Exception_Compiler( 'The second argument to fadein must be a percentage' . ( $amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $hsl = $color->toHSL();
+ $hsl['a'] += $amount->value / 100;
+ $hsl['a'] = self::clamp( $hsl['a'] );
+ return $this->hsla( $hsl['h'], $hsl['s'], $hsl['l'], $hsl['a'] );
+ }
+
+ public function fadeout( $color = null, $amount = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to fadeout must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$amount instanceof Less_Tree_Dimension ) {
+ throw new Less_Exception_Compiler( 'The second argument to fadeout must be a percentage' . ( $amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $hsl = $color->toHSL();
+ $hsl['a'] -= $amount->value / 100;
+ $hsl['a'] = self::clamp( $hsl['a'] );
+ return $this->hsla( $hsl['h'], $hsl['s'], $hsl['l'], $hsl['a'] );
+ }
+
+ public function fade( $color = null, $amount = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to fade must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$amount instanceof Less_Tree_Dimension ) {
+ throw new Less_Exception_Compiler( 'The second argument to fade must be a percentage' . ( $amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $hsl = $color->toHSL();
+
+ $hsl['a'] = $amount->value / 100;
+ $hsl['a'] = self::clamp( $hsl['a'] );
+ return $this->hsla( $hsl['h'], $hsl['s'], $hsl['l'], $hsl['a'] );
+ }
+
+ public function spin( $color = null, $amount = null ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to spin must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$amount instanceof Less_Tree_Dimension ) {
+ throw new Less_Exception_Compiler( 'The second argument to spin must be a number' . ( $amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $hsl = $color->toHSL();
+ $hue = fmod( $hsl['h'] + $amount->value, 360 );
+
+ $hsl['h'] = $hue < 0 ? 360 + $hue : $hue;
+
+ return $this->hsla( $hsl['h'], $hsl['s'], $hsl['l'], $hsl['a'] );
+ }
+
+ //
+ // Copyright (c) 2006-2009 Hampton Catlin, Nathan Weizenbaum, and Chris Eppstein
+ // https://sass-lang.com/
+ //
+
+ /**
+ * @param Less_Tree|null $color1
+ * @param Less_Tree|null $color2
+ * @param Less_Tree|null $weight
+ */
+ public function mix( $color1 = null, $color2 = null, $weight = null ) {
+ if ( !$color1 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to mix must be a color' . ( $color1 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$color2 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The second argument to mix must be a color' . ( $color2 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$weight ) {
+ $weight = new Less_Tree_Dimension( '50', '%' );
+ }
+ if ( !$weight instanceof Less_Tree_Dimension ) {
+ throw new Less_Exception_Compiler( 'The third argument to contrast must be a percentage' . ( $weight instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ $p = $weight->value / 100.0;
+ $w = $p * 2 - 1;
+ $hsl1 = $color1->toHSL();
+ $hsl2 = $color2->toHSL();
+ $a = $hsl1['a'] - $hsl2['a'];
+
+ $w1 = ( ( ( ( $w * $a ) == -1 ) ? $w : ( $w + $a ) / ( 1 + $w * $a ) ) + 1 ) / 2;
+ $w2 = 1 - $w1;
+
+ $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
+ ];
+
+ $alpha = $color1->alpha * $p + $color2->alpha * ( 1 - $p );
+
+ return new Less_Tree_Color( $rgb, $alpha );
+ }
+
+ public function greyscale( $color ) {
+ return $this->desaturate( $color, new Less_Tree_Dimension( 100, '%' ) );
+ }
+
+ public function contrast( $color, $dark = null, $light = null, $threshold = null ) {
+ // filter: contrast(3.2);
+ // should be kept as is, so check for color
+ if ( !$color instanceof Less_Tree_Color ) {
+ return null;
+ }
+ if ( !$light ) {
+ $light = $this->rgba( 255, 255, 255, 1.0 );
+ }
+ if ( !$dark ) {
+ $dark = $this->rgba( 0, 0, 0, 1.0 );
+ }
+
+ if ( !$dark instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The second argument to contrast must be a color' . ( $dark instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$light instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The third argument to contrast must be a color' . ( $light instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ // Figure out which is actually light and dark!
+ if ( $dark->luma() > $light->luma() ) {
+ $t = $light;
+ $light = $dark;
+ $dark = $t;
+ }
+ if ( !$threshold ) {
+ $threshold = 0.43;
+ } else {
+ $threshold = self::number( $threshold );
+ }
+
+ if ( $color->luma() < $threshold ) {
+ return $light;
+ } else {
+ return $dark;
+ }
+ }
+
+ public function e( $str ) {
+ if ( is_string( $str ) ) {
+ return new Less_Tree_Anonymous( $str );
+ }
+ return new Less_Tree_Anonymous( $str instanceof Less_Tree_JavaScript ? $str->expression : $str->value );
+ }
+
+ public function escape( $str ) {
+ $revert = [ '%21' => '!', '%2A' => '*', '%27' => "'",'%3F' => '?','%26' => '&','%2C' => ',','%2F' => '/','%40' => '@','%2B' => '+','%24' => '$' ];
+
+ return new Less_Tree_Anonymous( strtr( rawurlencode( $str->value ), $revert ) );
+ }
+
+ /**
+ * todo: This function will need some additional work to make it work the same as less.js
+ *
+ */
+ public function replace( $string, $pattern, $replacement, $flags = null ) {
+ $result = $string->value;
+
+ $expr = '/' . str_replace( '/', '\\/', $pattern->value ) . '/';
+ if ( $flags && $flags->value ) {
+ $expr .= self::replace_flags( $flags->value );
+ }
+
+ $result = preg_replace( $expr, $replacement->value, $result );
+
+ if ( property_exists( $string, 'quote' ) ) {
+ return new Less_Tree_Quoted( $string->quote, $result, $string->escaped );
+ }
+ return new Less_Tree_Quoted( '', $result );
+ }
+
+ public static function replace_flags( $flags ) {
+ $flags = str_split( $flags, 1 );
+ $new_flags = '';
+
+ foreach ( $flags as $flag ) {
+ switch ( $flag ) {
+ case 'e':
+ case 'g':
+ break;
+
+ default:
+ $new_flags .= $flag;
+ break;
+ }
+ }
+
+ return $new_flags;
+ }
+
+ public function _percent() {
+ $string = func_get_arg( 0 );
+
+ $args = func_get_args();
+ array_shift( $args );
+ $result = $string->value;
+
+ foreach ( $args as $arg ) {
+ if ( preg_match( '/%[sda]/i', $result, $token ) ) {
+ $token = $token[0];
+ $value = stristr( $token, 's' ) ? $arg->value : $arg->toCSS();
+ $value = preg_match( '/[A-Z]$/', $token ) ? urlencode( $value ) : $value;
+ $result = preg_replace( '/%[sda]/i', $value, $result, 1 );
+ }
+ }
+ $result = str_replace( '%%', '%', $result );
+
+ return new Less_Tree_Quoted( $string->quote, $result, $string->escaped );
+ }
+
+ public function unit( $val, $unit = null ) {
+ if ( !( $val instanceof Less_Tree_Dimension ) ) {
+ throw new Less_Exception_Compiler( 'The first argument to unit must be a number' . ( $val instanceof Less_Tree_Operation ? '. Have you forgotten parenthesis?' : '.' ) );
+ }
+
+ if ( $unit ) {
+ if ( $unit instanceof Less_Tree_Keyword ) {
+ $unit = $unit->value;
+ } else {
+ $unit = $unit->toCSS();
+ }
+ } else {
+ $unit = "";
+ }
+ return new Less_Tree_Dimension( $val->value, $unit );
+ }
+
+ public function convert( $val, $unit ) {
+ return $val->convertTo( $unit->value );
+ }
+
+ public function round( $n, $f = false ) {
+ $fraction = 0;
+ if ( $f !== false ) {
+ $fraction = $f->value;
+ }
+
+ return $this->_math( 'Less_Parser::round', null, $n, $fraction );
+ }
+
+ public function pi() {
+ return new Less_Tree_Dimension( M_PI );
+ }
+
+ public function mod( $a, $b ) {
+ return new Less_Tree_Dimension( $a->value % $b->value, $a->unit );
+ }
+
+ public function pow( $x, $y ) {
+ if ( is_numeric( $x ) && is_numeric( $y ) ) {
+ $x = new Less_Tree_Dimension( $x );
+ $y = new Less_Tree_Dimension( $y );
+ } elseif ( !( $x instanceof Less_Tree_Dimension ) || !( $y instanceof Less_Tree_Dimension ) ) {
+ throw new Less_Exception_Compiler( 'Arguments must be numbers' );
+ }
+
+ return new Less_Tree_Dimension( pow( $x->value, $y->value ), $x->unit );
+ }
+
+ // var mathFunctions = [{name:"ce ...
+ public function ceil( $n ) {
+ return $this->_math( 'ceil', null, $n );
+ }
+
+ public function floor( $n ) {
+ return $this->_math( 'floor', null, $n );
+ }
+
+ public function sqrt( $n ) {
+ return $this->_math( 'sqrt', null, $n );
+ }
+
+ public function abs( $n ) {
+ return $this->_math( 'abs', null, $n );
+ }
+
+ public function tan( $n ) {
+ return $this->_math( 'tan', '', $n );
+ }
+
+ public function sin( $n ) {
+ return $this->_math( 'sin', '', $n );
+ }
+
+ public function cos( $n ) {
+ return $this->_math( 'cos', '', $n );
+ }
+
+ public function atan( $n ) {
+ return $this->_math( 'atan', 'rad', $n );
+ }
+
+ public function asin( $n ) {
+ return $this->_math( 'asin', 'rad', $n );
+ }
+
+ public function acos( $n ) {
+ return $this->_math( 'acos', 'rad', $n );
+ }
+
+ private function _math() {
+ $args = func_get_args();
+ $fn = array_shift( $args );
+ $unit = array_shift( $args );
+
+ if ( $args[0] instanceof Less_Tree_Dimension ) {
+
+ if ( $unit === null ) {
+ $unit = $args[0]->unit;
+ } else {
+ $args[0] = $args[0]->unify();
+ }
+ $args[0] = (float)$args[0]->value;
+ return new Less_Tree_Dimension( call_user_func_array( $fn, $args ), $unit );
+ } elseif ( is_numeric( $args[0] ) ) {
+ return call_user_func_array( $fn, $args );
+ } else {
+ throw new Less_Exception_Compiler( "math functions take numbers as parameters" );
+ }
+ }
+
+ /**
+ * @param bool $isMin
+ * @param array<Less_Tree> $args
+ */
+ private function _minmax( $isMin, $args ) {
+ $arg_count = count( $args );
+
+ if ( $arg_count < 1 ) {
+ throw new Less_Exception_Compiler( 'one or more arguments required' );
+ }
+
+ $j = null;
+ $unitClone = null;
+ $unitStatic = null;
+
+ // elems only contains original argument values.
+ $order = [];
+ // key is the unit.toString() for unified tree.Dimension values,
+ // value is the index into the order array.
+ $values = [];
+
+ for ( $i = 0; $i < $arg_count; $i++ ) {
+ $current = $args[$i];
+ if ( !( $current instanceof Less_Tree_Dimension ) ) {
+ // @phan-suppress-next-line PhanUndeclaredProperty Checked Less_Tree->value
+ if ( property_exists( $args[$i], 'value' ) && is_array( $args[$i]->value ) ) {
+ // @phan-suppress-next-line PhanUndeclaredProperty Checked Less_Tree->value
+ $args[] = $args[$i]->value;
+ }
+ continue;
+ }
+ // PhanTypeInvalidDimOffset -- False positive, safe after continue or non-first iterations
+ '@phan-var non-empty-list<Less_Tree_Dimension> $order';
+
+ if ( $current->unit->toString() === '' && !$unitClone ) {
+ $temp = new Less_Tree_Dimension( $current->value, $unitClone );
+ $currentUnified = $temp->unify();
+ } else {
+ $currentUnified = $current->unify();
+ }
+
+ if ( $currentUnified->unit->toString() === "" && !$unitStatic ) {
+ $unit = $unitStatic;
+ } else {
+ $unit = $currentUnified->unit->toString();
+ }
+
+ if ( $unit !== '' && !$unitStatic || $unit !== '' && $order[0]->unify()->unit->toString() === "" ) {
+ $unitStatic = $unit;
+ }
+
+ if ( $unit != '' && !$unitClone ) {
+ $unitClone = $current->unit->toString();
+ }
+
+ if ( isset( $values[''] ) && $unit !== '' && $unit === $unitStatic ) {
+ $j = $values[''];
+ } elseif ( isset( $values[$unit] ) ) {
+ $j = $values[$unit];
+ } else {
+
+ if ( $unitStatic && $unit !== $unitStatic ) {
+ throw new Less_Exception_Compiler( 'incompatible types' );
+ }
+ $values[$unit] = count( $order );
+ $order[] = $current;
+ continue;
+ }
+
+ if ( $order[$j]->unit->toString() === "" && $unitClone ) {
+ $temp = new Less_Tree_Dimension( $order[$j]->value, $unitClone );
+ $referenceUnified = $temp->unify();
+ } else {
+ $referenceUnified = $order[$j]->unify();
+ }
+ if ( ( $isMin && $currentUnified->value < $referenceUnified->value ) || ( !$isMin && $currentUnified->value > $referenceUnified->value ) ) {
+ $order[$j] = $current;
+ }
+ }
+
+ if ( count( $order ) == 1 ) {
+ return $order[0];
+ }
+ $args = [];
+ foreach ( $order as $a ) {
+ $args[] = $a->toCSS();
+ }
+ return new Less_Tree_Anonymous( ( $isMin ? 'min(' : 'max(' ) . implode( Less_Environment::$_outputMap[','], $args ) . ')' );
+ }
+
+ public function min() {
+ $args = func_get_args();
+ return $this->_minmax( true, $args );
+ }
+
+ public function max() {
+ $args = func_get_args();
+ return $this->_minmax( false, $args );
+ }
+
+ public function getunit( $n ) {
+ return new Less_Tree_Anonymous( $n->unit );
+ }
+
+ public function argb( $color ) {
+ if ( !$color instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to argb must be a color' . ( $color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ return new Less_Tree_Anonymous( $color->toARGB() );
+ }
+
+ public function percentage( $n ) {
+ return new Less_Tree_Dimension( $n->value * 100, '%' );
+ }
+
+ public function color( $n ) {
+ if ( $n instanceof Less_Tree_Quoted ) {
+ $colorCandidate = $n->value;
+ $returnColor = Less_Tree_Color::fromKeyword( $colorCandidate );
+ if ( $returnColor ) {
+ return $returnColor;
+ }
+ if ( preg_match( '/^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})/', $colorCandidate ) ) {
+ return new Less_Tree_Color( substr( $colorCandidate, 1 ) );
+ }
+ throw new Less_Exception_Compiler( "argument must be a color keyword or 3/6 digit hex e.g. #FFF" );
+ } else {
+ throw new Less_Exception_Compiler( "argument must be a string" );
+ }
+ }
+
+ public function iscolor( $n ) {
+ return $this->_isa( $n, 'Less_Tree_Color' );
+ }
+
+ public function isnumber( $n ) {
+ return $this->_isa( $n, 'Less_Tree_Dimension' );
+ }
+
+ public function isstring( $n ) {
+ return $this->_isa( $n, 'Less_Tree_Quoted' );
+ }
+
+ public function iskeyword( $n ) {
+ return $this->_isa( $n, 'Less_Tree_Keyword' );
+ }
+
+ public function isurl( $n ) {
+ return $this->_isa( $n, 'Less_Tree_Url' );
+ }
+
+ public function ispixel( $n ) {
+ return $this->isunit( $n, 'px' );
+ }
+
+ public function ispercentage( $n ) {
+ return $this->isunit( $n, '%' );
+ }
+
+ public function isem( $n ) {
+ return $this->isunit( $n, 'em' );
+ }
+
+ /**
+ * @param Less_Tree $n
+ * @param Less_Tree|string $unit
+ */
+ public function isunit( $n, $unit ) {
+ if ( is_object( $unit ) && property_exists( $unit, 'value' ) ) {
+ // @phan-suppress-next-line PhanUndeclaredProperty Checked Less_Tree->value
+ $unit = $unit->value;
+ }
+
+ return ( $n instanceof Less_Tree_Dimension ) && $n->unit->is( $unit ) ? new Less_Tree_Keyword( 'true' ) : new Less_Tree_Keyword( 'false' );
+ }
+
+ /**
+ * @param Less_Tree $n
+ * @param string $type
+ */
+ private function _isa( $n, $type ) {
+ return is_a( $n, $type ) ? new Less_Tree_Keyword( 'true' ) : new Less_Tree_Keyword( 'false' );
+ }
+
+ public function tint( $color, $amount = null ) {
+ return $this->mix( $this->rgb( 255, 255, 255 ), $color, $amount );
+ }
+
+ public function shade( $color, $amount = null ) {
+ return $this->mix( $this->rgb( 0, 0, 0 ), $color, $amount );
+ }
+
+ public function extract( $values, $index ) {
+ $index = (int)$index->value - 1; // (1-based index)
+ // handle non-array values as an array of length 1
+ // return 'undefined' if index is invalid
+ if ( property_exists( $values, 'value' ) && is_array( $values->value ) ) {
+ if ( isset( $values->value[$index] ) ) {
+ return $values->value[$index];
+ }
+ return null;
+
+ } elseif ( (int)$index === 0 ) {
+ return $values;
+ }
+
+ return null;
+ }
+
+ public function length( $values ) {
+ $n = ( property_exists( $values, 'value' ) && is_array( $values->value ) ) ? count( $values->value ) : 1;
+ return new Less_Tree_Dimension( $n );
+ }
+
+ public function datauri( $mimetypeNode, $filePathNode = null ) {
+ $filePath = ( $filePathNode ? $filePathNode->value : null );
+ $mimetype = $mimetypeNode->value;
+
+ $args = 2;
+ if ( !$filePath ) {
+ $filePath = $mimetype;
+ $args = 1;
+ }
+
+ $filePath = str_replace( '\\', '/', $filePath );
+ if ( Less_Environment::isPathRelative( $filePath ) ) {
+ $currentFileInfo = $this->currentFileInfo;
+ '@phan-var array $currentFileInfo';
+ if ( Less_Parser::$options['relativeUrls'] ) {
+ $temp = $currentFileInfo['currentDirectory'];
+ } else {
+ $temp = $currentFileInfo['entryPath'];
+ }
+
+ if ( !empty( $temp ) ) {
+ $filePath = Less_Environment::normalizePath( rtrim( $temp, '/' ) . '/' . $filePath );
+ }
+
+ }
+
+ // detect the mimetype if not given
+ if ( $args < 2 ) {
+
+ /* incomplete
+ $mime = require('mime');
+ mimetype = mime.lookup(path);
+
+ // use base 64 unless it's an ASCII or UTF-8 format
+ var charset = mime.charsets.lookup(mimetype);
+ useBase64 = ['US-ASCII', 'UTF-8'].indexOf(charset) < 0;
+ if (useBase64) mimetype += ';base64';
+ */
+
+ $mimetype = Less_Mime::lookup( $filePath );
+
+ $charset = Less_Mime::charsets_lookup( $mimetype );
+ $useBase64 = !in_array( $charset, [ 'US-ASCII', 'UTF-8' ] );
+ if ( $useBase64 ) { $mimetype .= ';base64';
+ }
+
+ } else {
+ $useBase64 = preg_match( '/;base64$/', $mimetype );
+ }
+
+ if ( file_exists( $filePath ) ) {
+ $buf = @file_get_contents( $filePath );
+ } else {
+ $buf = false;
+ }
+
+ // IE8 cannot handle a data-uri larger than 32KB. If this is exceeded
+ // and the --ieCompat flag is enabled, return a normal url() instead.
+ $DATA_URI_MAX_KB = 32;
+ $fileSizeInKB = round( strlen( $buf ) / 1024 );
+ if ( $fileSizeInKB >= $DATA_URI_MAX_KB ) {
+ $url = new Less_Tree_Url( ( $filePathNode ?: $mimetypeNode ), $this->currentFileInfo );
+ return $url->compile( $this->env );
+ }
+
+ if ( $buf ) {
+ $buf = $useBase64 ? base64_encode( $buf ) : rawurlencode( $buf );
+ $filePath = '"data:' . $mimetype . ',' . $buf . '"';
+ }
+
+ return new Less_Tree_Url( new Less_Tree_Anonymous( $filePath ) );
+ }
+
+ // svg-gradient
+ public function svggradient( $direction ) {
+ $throw_message = 'svg-gradient expects direction, start_color [start_position], [color position,]..., end_color [end_position]';
+ $arguments = func_get_args();
+
+ if ( count( $arguments ) < 3 ) {
+ throw new Less_Exception_Compiler( $throw_message );
+ }
+
+ $stops = array_slice( $arguments, 1 );
+ $gradientType = 'linear';
+ $rectangleDimension = 'x="0" y="0" width="1" height="1"';
+ $useBase64 = true;
+ $directionValue = $direction->toCSS();
+
+ switch ( $directionValue ) {
+ case "to bottom":
+ $gradientDirectionSvg = 'x1="0%" y1="0%" x2="0%" y2="100%"';
+ break;
+ case "to right":
+ $gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="0%"';
+ break;
+ case "to bottom right":
+ $gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="100%"';
+ break;
+ case "to top right":
+ $gradientDirectionSvg = 'x1="0%" y1="100%" x2="100%" y2="0%"';
+ break;
+ case "ellipse":
+ case "ellipse at center":
+ $gradientType = "radial";
+ $gradientDirectionSvg = 'cx="50%" cy="50%" r="75%"';
+ $rectangleDimension = 'x="-50" y="-50" width="101" height="101"';
+ break;
+ default:
+ throw new Less_Exception_Compiler( "svg-gradient direction must be 'to bottom', 'to right', 'to bottom right', 'to top right' or 'ellipse at center'" );
+ }
+
+ $returner = '<?xml version="1.0" ?>' .
+ '<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="100%" height="100%" viewBox="0 0 1 1" preserveAspectRatio="none">' .
+ '<' . $gradientType . 'Gradient id="gradient" gradientUnits="userSpaceOnUse" ' . $gradientDirectionSvg . '>';
+
+ for ( $i = 0; $i < count( $stops ); $i++ ) {
+ if ( is_object( $stops[$i] ) && property_exists( $stops[$i], 'value' ) ) {
+ $color = $stops[$i]->value[0];
+ $position = $stops[$i]->value[1];
+ } else {
+ $color = $stops[$i];
+ $position = null;
+ }
+
+ if ( !( $color instanceof Less_Tree_Color ) || ( !( ( $i === 0 || $i + 1 === count( $stops ) ) && $position === null ) && !( $position instanceof Less_Tree_Dimension ) ) ) {
+ throw new Less_Exception_Compiler( $throw_message );
+ }
+ if ( $position ) {
+ $positionValue = $position->toCSS();
+ } elseif ( $i === 0 ) {
+ $positionValue = '0%';
+ } else {
+ $positionValue = '100%';
+ }
+ $alpha = $color->alpha;
+ $returner .= '<stop offset="' . $positionValue . '" stop-color="' . $color->toRGB() . '"' . ( $alpha < 1 ? ' stop-opacity="' . $alpha . '"' : '' ) . '/>';
+ }
+
+ $returner .= '</' . $gradientType . 'Gradient><rect ' . $rectangleDimension . ' fill="url(#gradient)" /></svg>';
+
+ if ( $useBase64 ) {
+ $returner = "'data:image/svg+xml;base64," . base64_encode( $returner ) . "'";
+ } else {
+ $returner = "'data:image/svg+xml," . $returner . "'";
+ }
+
+ return new Less_Tree_URL( new Less_Tree_Anonymous( $returner ) );
+ }
+
+ /**
+ * Php version of javascript's `encodeURIComponent` function
+ *
+ * @param string $string The string to encode
+ * @return string The encoded string
+ */
+ public static function encodeURIComponent( $string ) {
+ $revert = [ '%21' => '!', '%2A' => '*', '%27' => "'", '%28' => '(', '%29' => ')' ];
+ return strtr( rawurlencode( $string ), $revert );
+ }
+
+ // Color Blending
+ // ref: https://www.w3.org/TR/compositing-1/
+ public function colorBlend( $mode, $color1, $color2 ) {
+ // backdrop
+ $ab = $color1->alpha;
+ // source
+ $as = $color2->alpha;
+ $result = [];
+
+ $ar = $as + $ab * ( 1 - $as );
+ for ( $i = 0; $i < 3; $i++ ) {
+ $cb = $color1->rgb[$i] / 255;
+ $cs = $color2->rgb[$i] / 255;
+ $cr = call_user_func( $mode, $cb, $cs );
+ if ( $ar ) {
+ $cr = ( $as * $cs + $ab * ( $cb - $as * ( $cb + $cs - $cr ) ) ) / $ar;
+ }
+ $result[$i] = $cr * 255;
+ }
+
+ return new Less_Tree_Color( $result, $ar );
+ }
+
+ public function multiply( $color1 = null, $color2 = null ) {
+ if ( !$color1 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to multiply must be a color' . ( $color1 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$color2 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The second argument to multiply must be a color' . ( $color2 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ return $this->colorBlend( [ $this,'colorBlendMultiply' ], $color1, $color2 );
+ }
+
+ private function colorBlendMultiply( $cb, $cs ) {
+ return $cb * $cs;
+ }
+
+ public function screen( $color1 = null, $color2 = null ) {
+ if ( !$color1 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to screen must be a color' . ( $color1 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$color2 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The second argument to screen must be a color' . ( $color2 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ return $this->colorBlend( [ $this,'colorBlendScreen' ], $color1, $color2 );
+ }
+
+ private function colorBlendScreen( $cb, $cs ) {
+ return $cb + $cs - $cb * $cs;
+ }
+
+ public function overlay( $color1 = null, $color2 = null ) {
+ if ( !$color1 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to overlay must be a color' . ( $color1 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$color2 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The second argument to overlay must be a color' . ( $color2 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ return $this->colorBlend( [ $this,'colorBlendOverlay' ], $color1, $color2 );
+ }
+
+ private function colorBlendOverlay( $cb, $cs ) {
+ $cb *= 2;
+ return ( $cb <= 1 )
+ ? $this->colorBlendMultiply( $cb, $cs )
+ : $this->colorBlendScreen( $cb - 1, $cs );
+ }
+
+ public function softlight( $color1 = null, $color2 = null ) {
+ if ( !$color1 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to softlight must be a color' . ( $color1 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$color2 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The second argument to softlight must be a color' . ( $color2 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ return $this->colorBlend( [ $this,'colorBlendSoftlight' ], $color1, $color2 );
+ }
+
+ private function colorBlendSoftlight( $cb, $cs ) {
+ $d = 1;
+ $e = $cb;
+ if ( $cs > 0.5 ) {
+ $e = 1;
+ $d = ( $cb > 0.25 ) ? sqrt( $cb )
+ : ( ( 16 * $cb - 12 ) * $cb + 4 ) * $cb;
+ }
+ return $cb - ( 1 - 2 * $cs ) * $e * ( $d - $cb );
+ }
+
+ public function hardlight( $color1 = null, $color2 = null ) {
+ if ( !$color1 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to hardlight must be a color' . ( $color1 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$color2 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The second argument to hardlight must be a color' . ( $color2 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ return $this->colorBlend( [ $this,'colorBlendHardlight' ], $color1, $color2 );
+ }
+
+ private function colorBlendHardlight( $cb, $cs ) {
+ return $this->colorBlendOverlay( $cs, $cb );
+ }
+
+ public function difference( $color1 = null, $color2 = null ) {
+ if ( !$color1 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to difference must be a color' . ( $color1 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$color2 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The second argument to difference must be a color' . ( $color2 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ return $this->colorBlend( [ $this,'colorBlendDifference' ], $color1, $color2 );
+ }
+
+ private function colorBlendDifference( $cb, $cs ) {
+ return abs( $cb - $cs );
+ }
+
+ public function exclusion( $color1 = null, $color2 = null ) {
+ if ( !$color1 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to exclusion must be a color' . ( $color1 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$color2 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The second argument to exclusion must be a color' . ( $color2 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ return $this->colorBlend( [ $this,'colorBlendExclusion' ], $color1, $color2 );
+ }
+
+ private function colorBlendExclusion( $cb, $cs ) {
+ return $cb + $cs - 2 * $cb * $cs;
+ }
+
+ public function average( $color1 = null, $color2 = null ) {
+ if ( !$color1 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to average must be a color' . ( $color1 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$color2 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The second argument to average must be a color' . ( $color2 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ return $this->colorBlend( [ $this,'colorBlendAverage' ], $color1, $color2 );
+ }
+
+ // non-w3c functions:
+ public function colorBlendAverage( $cb, $cs ) {
+ return ( $cb + $cs ) / 2;
+ }
+
+ public function negation( $color1 = null, $color2 = null ) {
+ if ( !$color1 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The first argument to negation must be a color' . ( $color1 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+ if ( !$color2 instanceof Less_Tree_Color ) {
+ throw new Less_Exception_Compiler( 'The second argument to negation must be a color' . ( $color2 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '' ) );
+ }
+
+ return $this->colorBlend( [ $this,'colorBlendNegation' ], $color1, $color2 );
+ }
+
+ public function colorBlendNegation( $cb, $cs ) {
+ return 1 - abs( $cb + $cs - 1 );
+ }
+
+ // ~ End of Color Blending
+
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-21 07:58:52 +0000