<?php
namespace Sabberworm\CSS\Value;
use Sabberworm\CSS\OutputFormat;
use Sabberworm\CSS\Parsing\ParserState;
use Sabberworm\CSS\Parsing\UnexpectedEOFException;
use Sabberworm\CSS\Parsing\UnexpectedTokenException;
/**
* `Color's can be input in the form #rrggbb, #rgb or schema(val1, val2, …) but are always stored as an array of
* ('s' => val1, 'c' => val2, 'h' => val3, …) and output in the second form.
*/
class Color extends CSSFunction
{
/**
* @param array<int, RuleValueList|CSSFunction|CSSString|LineName|Size|URL|string> $aColor
* @param int $iLineNo
*/
public function __construct(array $aColor, $iLineNo = 0)
{
parent::__construct(implode('', array_keys($aColor)), $aColor, ',', $iLineNo);
}
/**
* @param ParserState $oParserState
* @param bool $bIgnoreCase
*
* @return Color|CSSFunction
*
* @throws UnexpectedEOFException
* @throws UnexpectedTokenException
*/
public static function parse(ParserState $oParserState, $bIgnoreCase = false)
{
$aColor = [];
if ($oParserState->comes('#')) {
$oParserState->consume('#');
$sValue = $oParserState->parseIdentifier(false);
if ($oParserState->strlen($sValue) === 3) {
$sValue = $sValue[0] . $sValue[0] . $sValue[1] . $sValue[1] . $sValue[2] . $sValue[2];
} elseif ($oParserState->strlen($sValue) === 4) {
$sValue = $sValue[0] . $sValue[0] . $sValue[1] . $sValue[1] . $sValue[2] . $sValue[2] . $sValue[3]
. $sValue[3];
}
if ($oParserState->strlen($sValue) === 8) {
$aColor = [
'r' => new Size(intval($sValue[0] . $sValue[1], 16), null, true, $oParserState->currentLine()),
'g' => new Size(intval($sValue[2] . $sValue[3], 16), null, true, $oParserState->currentLine()),
'b' => new Size(intval($sValue[4] . $sValue[5], 16), null, true, $oParserState->currentLine()),
'a' => new Size(
round(self::mapRange(intval($sValue[6] . $sValue[7], 16), 0, 255, 0, 1), 2),
null,
true,
$oParserState->currentLine()
),
];
} elseif ($oParserState->strlen($sValue) === 6) {
$aColor = [
'r' => new Size(intval($sValue[0] . $sValue[1], 16), null, true, $oParserState->currentLine()),
'g' => new Size(intval($sValue[2] . $sValue[3], 16), null, true, $oParserState->currentLine()),
'b' => new Size(intval($sValue[4] . $sValue[5], 16), null, true, $oParserState->currentLine()),
];
} else {
throw new UnexpectedTokenException(
'Invalid hex color value',
$sValue,
'custom',
$oParserState->currentLine()
);
}
} else {
$sColorMode = $oParserState->parseIdentifier(true);
$oParserState->consumeWhiteSpace();
$oParserState->consume('(');
$bContainsVar = false;
$iLength = $oParserState->strlen($sColorMode);
for ($i = 0; $i < $iLength; ++$i) {
$oParserState->consumeWhiteSpace();
if ($oParserState->comes('var')) {
$aColor[$sColorMode[$i]] = CSSFunction::parseIdentifierOrFunction($oParserState);
$bContainsVar = true;
} else {
$aColor[$sColorMode[$i]] = Size::parse($oParserState, true);
}
if ($bContainsVar && $oParserState->comes(')')) {
// With a var argument the function can have fewer arguments
break;
}
$oParserState->consumeWhiteSpace();
if ($i < ($iLength - 1)) {
$oParserState->consume(',');
}
}
$oParserState->consume(')');
if ($bContainsVar) {
return new CSSFunction($sColorMode, array_values($aColor), ',', $oParserState->currentLine());
}
}
return new Color($aColor, $oParserState->currentLine());
}
/**
* @param float $fVal
* @param float $fFromMin
* @param float $fFromMax
* @param float $fToMin
* @param float $fToMax
*
* @return float
*/
private static function mapRange($fVal, $fFromMin, $fFromMax, $fToMin, $fToMax)
{
$fFromRange = $fFromMax - $fFromMin;
$fToRange = $fToMax - $fToMin;
$fMultiplier = $fToRange / $fFromRange;
$fNewVal = $fVal - $fFromMin;
$fNewVal *= $fMultiplier;
return $fNewVal + $fToMin;
}
/**
* @return array<int, RuleValueList|CSSFunction|CSSString|LineName|Size|URL|string>
*/
public function getColor()
{
return $this->aComponents;
}
/**
* @param array<int, RuleValueList|CSSFunction|CSSString|LineName|Size|URL|string> $aColor
*
* @return void
*/
public function setColor(array $aColor)
{
$this->setName(implode('', array_keys($aColor)));
$this->aComponents = $aColor;
}
/**
* @return string
*/
public function getColorDescription()
{
return $this->getName();
}
/**
* @return string
*/
public function __toString()
{
return $this->render(new OutputFormat());
}
/**
* @return string
*/
public function render(OutputFormat $oOutputFormat)
{
// Shorthand RGB color values
if ($oOutputFormat->getRGBHashNotation() && implode('', array_keys($this->aComponents)) === 'rgb') {
$sResult = sprintf(
'%02x%02x%02x',
$this->aComponents['r']->getSize(),
$this->aComponents['g']->getSize(),
$this->aComponents['b']->getSize()
);
return '#' . (($sResult[0] == $sResult[1]) && ($sResult[2] == $sResult[3]) && ($sResult[4] == $sResult[5])
? "$sResult[0]$sResult[2]$sResult[4]" : $sResult);
}
return parent::render($oOutputFormat);
}
}