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Add rgba support for css color attribute definition

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This commit is contained in:
f.godfrin 2017-02-09 22:18:15 +01:00
parent 8e4cacf0a7
commit d41a59e422
2 changed files with 36 additions and 6 deletions
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37
library/HTMLPurifier/AttrDef/CSS/Color.php
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@ -29,24 +29,49 @@ class HTMLPurifier_AttrDef_CSS_Color extends HTMLPurifier_AttrDef
return $colors[$lower];
}
if (strpos($color, 'rgb(') !== false) {
if (preg_match('#(rgb|rgba)\(#', $color, $matches) === 1) {
// get used function : rgb or rgba
$function = $matches[1];
if ($function == 'rgba') {
$parameters_size = 4;
} else {
$parameters_size = 3;
}
// rgb literal handling
$length = strlen($color);
if (strpos($color, ')') !== $length - 1) {
return false;
}
$triad = substr($color, 4, $length - 4 - 1);
$parts = explode(',', $triad);
if (count($parts) !== 3) {
$values = substr($color, strlen($function) + 1, $length - strlen($function) - 2);
$parts = explode(',', $values);
if (count($parts) !== $parameters_size) {
return false;
}
$type = false; // to ensure that they're all the same type
$new_parts = array();
$i = 0;
foreach ($parts as $part) {
$i++;
$part = trim($part);
if ($part === '') {
return false;
}
// different check for alpha channel
if ($function === 'rgba' && $i === count($parts)) {
$result = (new HTMLPurifier_AttrDef_CSS_AlphaValue())->validate($part, $config, $context);
if ($result === false) {
return false;
}
$new_parts[] = (string)$result;
continue;
}
$length = strlen($part);
if ($part[$length - 1] === '%') {
// handle percents
@ -80,8 +105,8 @@ class HTMLPurifier_AttrDef_CSS_Color extends HTMLPurifier_AttrDef
$new_parts[] = (string)$num;
}
}
$new_triad = implode(',', $new_parts);
$color = "rgb($new_triad)";
$new_values = implode(',', $new_parts);
$color = "$function($new_values)";
} else {
// hexadecimal handling
if ($color[0] === '#') {

5
tests/HTMLPurifier/AttrDef/CSS/ColorTest.php
View File

@ -11,10 +11,15 @@ class HTMLPurifier_AttrDef_CSS_ColorTest extends HTMLPurifier_AttrDefHarness
$this->assertDef('#fff');
$this->assertDef('#eeeeee');
$this->assertDef('#808080');
$this->assertDef('rgb(255, 0, 0)', 'rgb(255,0,0)'); // rm spaces
$this->assertDef('rgb(100%,0%,0%)');
$this->assertDef('rgb(50.5%,23.2%,43.9%)'); // decimals okay
$this->assertDef('rgba(255, 0, 0, 0)', 'rgba(255,0,0,0)'); // rm spaces
$this->assertDef('rgba(100%,0%,0%,.4)');
$this->assertDef('rgba(38.1%,59.7%,1.8%,0.7)', 'rgba(38.1%,59.7%,1.8%,.7)'); // decimals okay
$this->assertDef('#G00', false);
$this->assertDef('cmyk(40, 23, 43, 23)', false);
$this->assertDef('rgb(0%, 23, 68%)', false);