X-Git-Url: https://scripts.mit.edu/gitweb/autoinstallsdev/mediawiki.git/blobdiff_plain/19e297c21b10b1b8a3acad5e73fc71dcb35db44a..6932310fd58ebef145fa01eb76edf7150284d8ea:/vendor/oyejorge/less.php/lib/Less/Tree/Color.php

diff --git a/vendor/oyejorge/less.php/lib/Less/Tree/Color.php b/vendor/oyejorge/less.php/lib/Less/Tree/Color.php
new file mode 100644
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+++ b/vendor/oyejorge/less.php/lib/Less/Tree/Color.php
@@ -0,0 +1,230 @@
+<?php
+
+/**
+ * Color
+ *
+ * @package Less
+ * @subpackage tree
+ */
+class Less_Tree_Color extends Less_Tree{
+	public $rgb;
+	public $alpha;
+	public $isTransparentKeyword;
+	public $type = 'Color';
+
+	public function __construct($rgb, $a = 1, $isTransparentKeyword = null ){
+
+		if( $isTransparentKeyword ){
+			$this->rgb = $rgb;
+			$this->alpha = $a;
+			$this->isTransparentKeyword = true;
+			return;
+		}
+
+		$this->rgb = array();
+		if( is_array($rgb) ){
+			$this->rgb = $rgb;
+		}else if( strlen($rgb) == 6 ){
+			foreach(str_split($rgb, 2) as $c){
+				$this->rgb[] = hexdec($c);
+			}
+		}else{
+			foreach(str_split($rgb, 1) as $c){
+				$this->rgb[] = hexdec($c.$c);
+			}
+		}
+		$this->alpha = is_numeric($a) ? $a : 1;
+	}
+
+	public function compile(){
+		return $this;
+	}
+
+	public function luma(){
+		$r = $this->rgb[0] / 255;
+		$g = $this->rgb[1] / 255;
+		$b = $this->rgb[2] / 255;
+
+		$r = ($r <= 0.03928) ? $r / 12.92 : pow((($r + 0.055) / 1.055), 2.4);
+		$g = ($g <= 0.03928) ? $g / 12.92 : pow((($g + 0.055) / 1.055), 2.4);
+		$b = ($b <= 0.03928) ? $b / 12.92 : pow((($b + 0.055) / 1.055), 2.4);
+
+		return 0.2126 * $r + 0.7152 * $g + 0.0722 * $b;
+	}
+
+	/**
+	 * @see Less_Tree::genCSS
+	 */
+	public function genCSS( $output ){
+		$output->add( $this->toCSS() );
+	}
+
+	public function toCSS( $doNotCompress = false ){
+		$compress = Less_Parser::$options['compress'] && !$doNotCompress;
+		$alpha = Less_Functions::fround( $this->alpha );
+
+
+		//
+		// 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.
+		//
+		if( $alpha < 1 ){
+			if( ( $alpha === 0 || $alpha === 0.0 ) && isset($this->isTransparentKeyword) && $this->isTransparentKeyword ){
+				return 'transparent';
+			}
+
+			$values = array();
+			foreach($this->rgb as $c){
+				$values[] = Less_Functions::clamp( round($c), 255);
+			}
+			$values[] = $alpha;
+
+			$glue = ($compress ? ',' : ', ');
+			return "rgba(" . implode($glue, $values) . ")";
+		}else{
+
+			$color = $this->toRGB();
+
+			if( $compress ){
+
+				// Convert color to short format
+				if( $color[1] === $color[2] && $color[3] === $color[4] && $color[5] === $color[6]) {
+					$color = '#'.$color[1] . $color[3] . $color[5];
+				}
+			}
+
+			return $color;
+		}
+	}
+
+	//
+	// 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.
+	//
+
+	/**
+	 * @param string $op
+	 */
+	public function operate( $op, $other) {
+		$rgb = array();
+		$alpha = $this->alpha * (1 - $other->alpha) + $other->alpha;
+		for ($c = 0; $c < 3; $c++) {
+			$rgb[$c] = Less_Functions::operate( $op, $this->rgb[$c], $other->rgb[$c]);
+		}
+		return new Less_Tree_Color($rgb, $alpha);
+	}
+
+	public function toRGB(){
+		return $this->toHex($this->rgb);
+	}
+
+	public function toHSL(){
+		$r = $this->rgb[0] / 255;
+		$g = $this->rgb[1] / 255;
+		$b = $this->rgb[2] / 255;
+		$a = $this->alpha;
+
+		$max = max($r, $g, $b);
+		$min = min($r, $g, $b);
+		$l = ($max + $min) / 2;
+		$d = $max - $min;
+
+		$h = $s = 0;
+		if( $max !== $min ){
+			$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 array('h' => $h * 360, 's' => $s, 'l' => $l, 'a' => $a );
+	}
+
+	//Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript
+    public function toHSV() {
+		$r = $this->rgb[0] / 255;
+		$g = $this->rgb[1] / 255;
+		$b = $this->rgb[2] / 255;
+		$a = $this->alpha;
+
+		$max = max($r, $g, $b);
+		$min = min($r, $g, $b);
+
+		$v = $max;
+
+		$d = $max - $min;
+		if ($max === 0) {
+			$s = 0;
+		} else {
+			$s = $d / $max;
+		}
+
+		$h = 0;
+		if( $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 array('h'=> $h * 360, 's'=> $s, 'v'=> $v, 'a' => $a );
+	}
+
+	public function toARGB(){
+		$argb = array_merge( (array) Less_Parser::round($this->alpha * 255), $this->rgb);
+		return $this->toHex( $argb );
+	}
+
+	public function compare($x){
+
+		if( !property_exists( $x, 'rgb' ) ){
+			return -1;
+		}
+
+
+		return ($x->rgb[0] === $this->rgb[0] &&
+			$x->rgb[1] === $this->rgb[1] &&
+			$x->rgb[2] === $this->rgb[2] &&
+			$x->alpha === $this->alpha) ? 0 : -1;
+	}
+
+    public function toHex( $v ){
+
+		$ret = '#';
+		foreach($v as $c){
+			$c = Less_Functions::clamp( Less_Parser::round($c), 255);
+			if( $c < 16 ){
+				$ret .= '0';
+			}
+			$ret .= dechex($c);
+		}
+
+		return $ret;
+	}
+
+
+	/**
+	 * @param string $keyword
+	 */
+	public static function fromKeyword( $keyword ){
+		$keyword = strtolower($keyword);
+
+		if( Less_Colors::hasOwnProperty($keyword) ){
+			// detect named color
+			return new Less_Tree_Color(substr(Less_Colors::color($keyword), 1));
+		}
+
+		if( $keyword === 'transparent' ){
+			return new Less_Tree_Color( array(0, 0, 0), 0, true);
+		}
+	}
+
+}