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validate color (#2072)

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This commit is contained in:
Kevin Papst
2020-10-28 20:01:08 +01:00
committed by GitHub
parent 82e1d6b917
commit 1444593bbd
8 changed files with 189 additions and 14 deletions
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10
src/Utils/Color.php
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@@ -78,14 +78,18 @@ final class Color
public function getFontContrastColor(string $color): string
{
if ($color[0] !== '#') {
throw new \InvalidArgumentException('Invalid color code given, only #hexadecimal is supported.');
if (empty($color) || $color[0] !== '#') {
// do not throw exception on invalid colors, as they were not validated in the past
$color = Constants::DEFAULT_COLOR;
}
$color = substr($color, 1);
$length = \strlen($color);
if (\strlen($color) === 3) {
if ($length === 3) {
$color = $color[0] . $color[0] . $color[1] . $color[1] . $color[2] . $color[2];
} elseif ($length !== 6) {
$color = substr(Constants::DEFAULT_COLOR, 1);
}
$r = hexdec(substr($color, 0, 2));