<?php
namespace Sabberworm\CSS\Value;
use Sabberworm\CSS\OutputFormat;
use Sabberworm\CSS\Parsing\ParserState;
use Sabberworm\CSS\Parsing\UnexpectedEOFException;
use Sabberworm\CSS\Parsing\UnexpectedTokenException;
class Size extends PrimitiveValue
{
/**
* vh/vw/vm(ax)/vmin/rem are absolute insofar as they don’t scale to the immediate parent (only the viewport)
*
* @var array<int, string>
*/
const ABSOLUTE_SIZE_UNITS = ['px', 'cm', 'mm', 'mozmm', 'in', 'pt', 'pc', 'vh', 'vw', 'vmin', 'vmax', 'rem'];
/**
* @var array<int, string>
*/
const RELATIVE_SIZE_UNITS = ['%', 'em', 'ex', 'ch', 'fr'];
/**
* @var array<int, string>
*/
const NON_SIZE_UNITS = ['deg', 'grad', 'rad', 's', 'ms', 'turns', 'Hz', 'kHz'];
/**
* @var array<int, array<string, string>>|null
*/
private static $SIZE_UNITS = null;
/**
* @var float
*/
private $fSize;
/**
* @var string|null
*/
private $sUnit;
/**
* @var bool
*/
private $bIsColorComponent;
/**
* @param float|int|string $fSize
* @param string|null $sUnit
* @param bool $bIsColorComponent
* @param int $iLineNo
*/
public function __construct($fSize, $sUnit = null, $bIsColorComponent = false, $iLineNo = 0)
{
parent::__construct($iLineNo);
$this->fSize = (float)$fSize;
$this->sUnit = $sUnit;
$this->bIsColorComponent = $bIsColorComponent;
}
/**
* @param bool $bIsColorComponent
*
* @return Size
*
* @throws UnexpectedEOFException
* @throws UnexpectedTokenException
*/
public static function parse(ParserState $oParserState, $bIsColorComponent = false)
{
$sSize = '';
if ($oParserState->comes('-')) {
$sSize .= $oParserState->consume('-');
}
while (is_numeric($oParserState->peek()) || $oParserState->comes('.')) {
if ($oParserState->comes('.')) {
$sSize .= $oParserState->consume('.');
} else {
$sSize .= $oParserState->consume(1);
}
}
$sUnit = null;
$aSizeUnits = self::getSizeUnits();
foreach ($aSizeUnits as $iLength => &$aValues) {
$sKey = strtolower($oParserState->peek($iLength));
if (array_key_exists($sKey, $aValues)) {
if (($sUnit = $aValues[$sKey]) !== null) {
$oParserState->consume($iLength);
break;
}
}
}
return new Size((float)$sSize, $sUnit, $bIsColorComponent, $oParserState->currentLine());
}
/**
* @return array<int, array<string, string>>
*/
private static function getSizeUnits()
{
if (!is_array(self::$SIZE_UNITS)) {
self::$SIZE_UNITS = [];
foreach (array_merge(self::ABSOLUTE_SIZE_UNITS, self::RELATIVE_SIZE_UNITS, self::NON_SIZE_UNITS) as $val) {
$iSize = strlen($val);
if (!isset(self::$SIZE_UNITS[$iSize])) {
self::$SIZE_UNITS[$iSize] = [];
}
self::$SIZE_UNITS[$iSize][strtolower($val)] = $val;
}
krsort(self::$SIZE_UNITS, SORT_NUMERIC);
}
return self::$SIZE_UNITS;
}
/**
* @param string $sUnit
*
* @return void
*/
public function setUnit($sUnit)
{
$this->sUnit = $sUnit;
}
/**
* @return string|null
*/
public function getUnit()
{
return $this->sUnit;
}
/**
* @param float|int|string $fSize
*/
public function setSize($fSize)
{
$this->fSize = (float)$fSize;
}
/**
* @return float
*/
public function getSize()
{
return $this->fSize;
}
/**
* @return bool
*/
public function isColorComponent()
{
return $this->bIsColorComponent;
}
/**
* Returns whether the number stored in this Size really represents a size (as in a length of something on screen).
*
* @return false if the unit an angle, a duration, a frequency or the number is a component in a Color object.
*/
public function isSize()
{
if (in_array($this->sUnit, self::NON_SIZE_UNITS, true)) {
return false;
}
return !$this->isColorComponent();
}
/**
* @return bool
*/
public function isRelative()
{
if (in_array($this->sUnit, self::RELATIVE_SIZE_UNITS, true)) {
return true;
}
if ($this->sUnit === null && $this->fSize != 0) {
return true;
}
return false;
}
/**
* @return string
*/
public function __toString()
{
return $this->render(new OutputFormat());
}
/**
* @return string
*/
public function render(OutputFormat $oOutputFormat)
{
$l = localeconv();
$sPoint = preg_quote($l['decimal_point'], '/');
$sSize = preg_match("/[\d\.]+e[+-]?\d+/i", (string)$this->fSize)
? preg_replace("/$sPoint?0+$/", "", sprintf("%f", $this->fSize)) : $this->fSize;
return preg_replace(["/$sPoint/", "/^(-?)0\./"], ['.', '$1.'], $sSize)
. ($this->sUnit === null ? '' : $this->sUnit);
}
}