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-rw-r--r--lib/less.php/Functions.php1188
1 files changed, 1188 insertions, 0 deletions
diff --git a/lib/less.php/Functions.php b/lib/less.php/Functions.php
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@@ -0,0 +1,1188 @@
+<?php
+
+/**
+ * Builtin functions
+ *
+ * @package Less
+ * @subpackage function
+ * @see http://lesscss.org/functions/
+ */
+class Less_Functions{
+
+ public $env;
+ public $currentFileInfo;
+
+ function __construct($env, $currentFileInfo = null ){
+ $this->env = $env;
+ $this->currentFileInfo = $currentFileInfo;
+ }
+
+ /**
+ * @param string $op
+ */
+ 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 : $n->value);
+ } else if (is_numeric($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 * $size / 100;
+ } else {
+ return Less_Functions::number($n);
+ }
+ }
+
+ public function rgb ($r = null, $g = null, $b = null){
+ if (is_null($r) || is_null($g) || is_null($b)) {
+ 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){
+ $rgb = array($r, $g, $b);
+ $rgb = array_map(array('Less_Functions','scaled'),$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 double $h
+ */
+ public function hsla_hue($h, $m1, $m2){
+ $h = $h < 0 ? $h + 1 : ($h > 1 ? $h - 1 : $h);
+ if ($h * 6 < 1) return $m1 + ($m2 - $m1) * $h * 6;
+ else if ($h * 2 < 1) return $m2;
+ else if ($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 double $a
+ */
+ public function hsva($h, $s, $v, $a) {
+ $h = ((Less_Functions::number($h) % 360) / 360 ) * 360;
+ $s = Less_Functions::number($s);
+ $v = Less_Functions::number($v);
+ $a = Less_Functions::number($a);
+
+ $i = floor(($h / 60) % 6);
+ $f = ($h / 60) - $i;
+
+ $vs = array( $v,
+ $v * (1 - $s),
+ $v * (1 - $f * $s),
+ $v * (1 - (1 - $f) * $s));
+
+ $perm = array(array(0, 3, 1),
+ array(2, 0, 1),
+ array(1, 0, 3),
+ array(1, 2, 0),
+ array(3, 1, 0),
+ array(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_Dimension $amount
+ */
+ public function desaturate($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
+ // http://sass-lang.com
+ //
+
+ /**
+ * @param Less_Tree_Color $color1
+ */
+ public function mix($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;
+
+ $rgb = array($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 {
+ $threshold = Less_Functions::number($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){
+
+ $revert = array('%21'=>'!', '%2A'=>'*', '%27'=>"'",'%3F'=>'?','%26'=>'&','%2C'=>',','%2F'=>'/','%40'=>'@','%2B'=>'+','%24'=>'$');
+
+ 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), $unit);
+ } else if (is_numeric($args[0])) {
+ return call_user_func_array($fn,$args);
+ } else {
+ throw new Less_Exception_Compiler("math functions take numbers as parameters");
+ }
+ }
+
+ /**
+ * @param boolean $isMin
+ */
+ 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;
+
+
+ $order = array(); // elems only contains original argument values.
+ $values = array(); // key is the unit.toString() for unified tree.Dimension values,
+ // value is the index into the order array.
+
+
+ for( $i = 0; $i < $arg_count; $i++ ){
+ $current = $args[$i];
+ if( !($current instanceof Less_Tree_Dimension) ){
+ if( is_array($args[$i]->value) ){
+ $args[] = $args[$i]->value;
+ }
+ continue;
+ }
+
+ 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];
+ }
+ $args = array();
+ foreach($order as $a){
+ $args[] = $a->toCSS($this->env);
+ }
+ 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 string $unit
+ */
+ public function isunit( $n, $unit ){
+
+ if( is_object($unit) && property_exists($unit,'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 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($filePath) ){
+
+ if( Less_Parser::$options['relativeUrls'] ){
+ $temp = $this->currentFileInfo['currentDirectory'];
+ } else {
+ $temp = $this->currentFileInfo['entryPath'];
+ }
+
+ if( !empty($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,array('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 ? $filePathNode : $mimetypeNode), $this->currentFileInfo);
+ return $url->compile($this);
+ }
+
+ 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){
+ $revert = array('%21' => '!', '%2A' => '*', '%27' => "'", '%28' => '(', '%29' => ')');
+ return strtr(rawurlencode($string), $revert);
+ }
+
+
+ // Color Blending
+ // ref: http://www.w3.org/TR/compositing-1
+
+ public function colorBlend( $mode, $color1, $color2 ){
+ $ab = $color1->alpha; // backdrop
+ $as = $color2->alpha; // source
+ $r = array(); // 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;
+ }
+ $r[$i] = $cr * 255;
+ }
+
+ return new Less_Tree_Color($r, $ar);
+ }
+
+ public function multiply($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 $this->colorBlend( array($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 $this->colorBlend( array($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 $this->colorBlend( array($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 $this->colorBlend( array($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 $this->colorBlend( array($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 $this->colorBlend( array($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 $this->colorBlend( array($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 $this->colorBlend( array($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 $this->colorBlend( array($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 2.25.1) at 2024-12-23 01:41:50 +0000