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Merge pull request #118 from fxbt/master
Add hsl, hsla and rgba support for css color attribute definition
This commit is contained in:
Edward Z. Yang
GitHub
commit
0c31b22240
@ -86,7 +86,13 @@ abstract class HTMLPurifier_AttrDef
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*/
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protected function mungeRgb($string)
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{
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return preg_replace('/rgb\((\d+)\s*,\s*(\d+)\s*,\s*(\d+)\)/', 'rgb(\1,\2,\3)', $string);
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$p = '\s*(\d+(\.\d+)?([%]?))\s*';
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if (preg_match('/(rgba|hsla)\(/', $string)) {
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return preg_replace('/(rgba|hsla)\('.$p.','.$p.','.$p.','.$p.'\)/', '\1(\2,\5,\8,\11)', $string);
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}
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return preg_replace('/(rgb|hsl)\('.$p.','.$p.','.$p.'\)/', '\1(\2,\5,\8)', $string);
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}
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/**
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@ -6,6 +6,16 @@
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class HTMLPurifier_AttrDef_CSS_Color extends HTMLPurifier_AttrDef
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{
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/**
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* @type HTMLPurifier_AttrDef_CSS_AlphaValue
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*/
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protected $alpha;
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public function __construct()
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{
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$this->alpha = new HTMLPurifier_AttrDef_CSS_AlphaValue();
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}
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/**
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* @param string $color
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* @param HTMLPurifier_Config $config
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@ -29,59 +39,104 @@ class HTMLPurifier_AttrDef_CSS_Color extends HTMLPurifier_AttrDef
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return $colors[$lower];
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}
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if (strpos($color, 'rgb(') !== false) {
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// rgb literal handling
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if (preg_match('#(rgb|rgba|hsl|hsla)\(#', $color, $matches) === 1) {
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$length = strlen($color);
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if (strpos($color, ')') !== $length - 1) {
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return false;
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}
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$triad = substr($color, 4, $length - 4 - 1);
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$parts = explode(',', $triad);
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if (count($parts) !== 3) {
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// get used function : rgb, rgba, hsl or hsla
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$function = $matches[1];
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$parameters_size = 3;
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$alpha_channel = false;
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if (substr($function, -1) === 'a') {
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$parameters_size = 4;
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$alpha_channel = true;
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}
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/*
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* Allowed types for values :
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* parameter_position => [type => max_value]
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*/
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$allowed_types = [
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1 => ['percentage' => 100, 'integer' => 255],
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2 => ['percentage' => 100, 'integer' => 255],
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3 => ['percentage' => 100, 'integer' => 255],
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];
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$allow_different_types = false;
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if (strpos($function, 'hsl') !== false) {
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$allowed_types = [
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1 => ['integer' => 360],
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2 => ['percentage' => 100],
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3 => ['percentage' => 100],
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];
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$allow_different_types = true;
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}
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$values = trim(str_replace($function, '', $color), ' ()');
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$parts = explode(',', $values);
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if (count($parts) !== $parameters_size) {
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return false;
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}
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$type = false; // to ensure that they're all the same type
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$type = false;
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$new_parts = array();
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$i = 0;
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foreach ($parts as $part) {
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$i++;
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$part = trim($part);
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if ($part === '') {
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return false;
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}
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$length = strlen($part);
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if ($part[$length - 1] === '%') {
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// handle percents
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if (!$type) {
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$type = 'percentage';
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} elseif ($type !== 'percentage') {
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// different check for alpha channel
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if ($alpha_channel === true && $i === count($parts)) {
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$result = $this->alpha->validate($part, $config, $context);
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if ($result === false) {
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return false;
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}
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$num = (float)substr($part, 0, $length - 1);
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if ($num < 0) {
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$num = 0;
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}
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if ($num > 100) {
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$num = 100;
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}
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$new_parts[] = "$num%";
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$new_parts[] = (string)$result;
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continue;
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}
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if (substr($part, -1) === '%') {
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$current_type = 'percentage';
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} else {
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// handle integers
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if (!$type) {
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$type = 'integer';
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} elseif ($type !== 'integer') {
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return false;
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}
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$num = (int)$part;
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if ($num < 0) {
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$num = 0;
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}
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if ($num > 255) {
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$num = 255;
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}
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$new_parts[] = (string)$num;
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$current_type = 'integer';
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}
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if (!array_key_exists($current_type, $allowed_types[$i])) {
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return false;
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}
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if (!$type) {
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$type = $current_type;
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}
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if ($allow_different_types === false && $type != $current_type) {
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return false;
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}
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$max_value = $allowed_types[$i][$current_type];
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if ($current_type == 'integer') {
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// Return value between range 0 -> $max_value
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$new_parts[] = (int)max(min($part, $max_value), 0);
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} elseif ($current_type == 'percentage') {
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$new_parts[] = (float)max(min(rtrim($part, '%'), $max_value), 0) . '%';
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}
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}
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$new_triad = implode(',', $new_parts);
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$color = "rgb($new_triad)";
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$new_values = implode(',', $new_parts);
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$color = $function . '(' . $new_values . ')';
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} else {
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// hexadecimal handling
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if ($color[0] === '#') {
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@ -100,6 +155,7 @@ class HTMLPurifier_AttrDef_CSS_Color extends HTMLPurifier_AttrDef
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}
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return $color;
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}
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}
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// vim: et sw=4 sts=4
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@ -12,12 +12,18 @@ class HTMLPurifier_AttrDef_CSS_BackgroundTest extends HTMLPurifier_AttrDefHarnes
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$this->assertDef($valid);
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$this->assertDef('url(\'chess.png\') #333 50% top repeat fixed', $valid);
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$this->assertDef(
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'rgb(34, 56, 33) url(chess.png) repeat fixed top',
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'rgb(34,56,33) url("chess.png") repeat fixed top'
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'rgb(34%, 56%, 33%) url(chess.png) repeat fixed top',
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'rgb(34%,56%,33%) url("chess.png") repeat fixed top'
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);
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$this->assertDef(
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'rgba(74, 12, 85, 0.35) repeat fixed bottom',
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'rgba(74,12,85,.35) repeat fixed bottom'
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);
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$this->assertDef(
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'hsl(244, 47.4%, 88.1%) right center',
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'hsl(244,47.4%,88.1%) right center'
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);
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}
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}
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// vim: et sw=4 sts=4
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@ -11,13 +11,33 @@ class HTMLPurifier_AttrDef_CSS_ColorTest extends HTMLPurifier_AttrDefHarness
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$this->assertDef('#fff');
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$this->assertDef('#eeeeee');
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$this->assertDef('#808080');
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$this->assertDef('rgb(255, 0, 0)', 'rgb(255,0,0)'); // rm spaces
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$this->assertDef('rgb(100%,0%,0%)');
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$this->assertDef('rgb(50.5%,23.2%,43.9%)'); // decimals okay
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$this->assertDef('rgb(-5,0,0)', 'rgb(0,0,0)'); // negative values
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$this->assertDef('rgb(295,0,0)', 'rgb(255,0,0)'); // max values
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$this->assertDef('rgb(12%,150%,0%)', 'rgb(12%,100%,0%)'); // percentage max values
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$this->assertDef('rgba(255, 0, 0, 0)', 'rgba(255,0,0,0)'); // rm spaces
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$this->assertDef('rgba(100%,0%,0%,.4)');
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$this->assertDef('rgba(38.1%,59.7%,1.8%,0.7)', 'rgba(38.1%,59.7%,1.8%,.7)'); // decimals okay
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$this->assertDef('hsl(275, 45%, 81%)', 'hsl(275,45%,81%)'); // rm spaces
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$this->assertDef('hsl(100,0%,0%)');
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$this->assertDef('hsl(38,59.7%,1.8%)', 'hsl(38,59.7%,1.8%)'); // decimals okay
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$this->assertDef('hsl(-11,-15%,25%)', 'hsl(0,0%,25%)'); // negative values
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$this->assertDef('hsl(380,125%,0%)', 'hsl(360,100%,0%)'); // max values
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$this->assertDef('hsla(100, 74%, 29%, 0)', 'hsla(100,74%,29%,0)'); // rm spaces
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$this->assertDef('hsla(154,87%,21%,.4)');
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$this->assertDef('hsla(45,94.3%,4.1%,0.7)', 'hsla(45,94.3%,4.1%,.7)'); // decimals okay
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$this->assertDef('#G00', false);
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$this->assertDef('cmyk(40, 23, 43, 23)', false);
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$this->assertDef('rgb(0%, 23, 68%)', false);
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$this->assertDef('rgb(0%, 23, 68%)', false); // no mixed type
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$this->assertDef('rgb(231, 144, 28.2%)', false); // no mixed type
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$this->assertDef('hsl(18%,12%,89%)', false); // integer, percentage, percentage
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// clip numbers outside sRGB gamut
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$this->assertDef('rgb(200%, -10%, 0%)', 'rgb(100%,0%,0%)');
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