MDL-65759 library: Update php-css-parser to 8.3.0
[moodle.git] / lib / php-css-parser / Value / Size.php
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1<?php
2
3namespace Sabberworm\CSS\Value;
4
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5use Sabberworm\CSS\Parsing\ParserState;
6
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7class Size extends PrimitiveValue {
8
9 const ABSOLUTE_SIZE_UNITS = 'px/cm/mm/mozmm/in/pt/pc/vh/vw/vm/vmin/vmax/rem'; //vh/vw/vm(ax)/vmin/rem are absolute insofar as they don’t scale to the immediate parent (only the viewport)
10 const RELATIVE_SIZE_UNITS = '%/em/ex/ch/fr';
11 const NON_SIZE_UNITS = 'deg/grad/rad/s/ms/turns/Hz/kHz';
12
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13 private static $SIZE_UNITS = null;
14
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15 private $fSize;
16 private $sUnit;
17 private $bIsColorComponent;
18
19 public function __construct($fSize, $sUnit = null, $bIsColorComponent = false, $iLineNo = 0) {
20 parent::__construct($iLineNo);
21 $this->fSize = floatval($fSize);
22 $this->sUnit = $sUnit;
23 $this->bIsColorComponent = $bIsColorComponent;
24 }
25
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26 public static function parse(ParserState $oParserState, $bIsColorComponent = false) {
27 $sSize = '';
28 if ($oParserState->comes('-')) {
29 $sSize .= $oParserState->consume('-');
30 }
31 while (is_numeric($oParserState->peek()) || $oParserState->comes('.')) {
32 if ($oParserState->comes('.')) {
33 $sSize .= $oParserState->consume('.');
34 } else {
35 $sSize .= $oParserState->consume(1);
36 }
37 }
38
39 $sUnit = null;
40 $aSizeUnits = self::getSizeUnits();
41 foreach($aSizeUnits as $iLength => &$aValues) {
42 $sKey = strtolower($oParserState->peek($iLength));
43 if(array_key_exists($sKey, $aValues)) {
44 if (($sUnit = $aValues[$sKey]) !== null) {
45 $oParserState->consume($iLength);
46 break;
47 }
48 }
49 }
50 return new Size(floatval($sSize), $sUnit, $bIsColorComponent, $oParserState->currentLine());
51 }
52
53 private static function getSizeUnits() {
54 if(self::$SIZE_UNITS === null) {
55 self::$SIZE_UNITS = array();
56 foreach (explode('/', Size::ABSOLUTE_SIZE_UNITS.'/'.Size::RELATIVE_SIZE_UNITS.'/'.Size::NON_SIZE_UNITS) as $val) {
57 $iSize = strlen($val);
58 if(!isset(self::$SIZE_UNITS[$iSize])) {
59 self::$SIZE_UNITS[$iSize] = array();
60 }
61 self::$SIZE_UNITS[$iSize][strtolower($val)] = $val;
62 }
63
64 // FIXME: Should we not order the longest units first?
65 ksort(self::$SIZE_UNITS, SORT_NUMERIC);
66 }
67
68 return self::$SIZE_UNITS;
69 }
70
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71 public function setUnit($sUnit) {
72 $this->sUnit = $sUnit;
73 }
74
75 public function getUnit() {
76 return $this->sUnit;
77 }
78
79 public function setSize($fSize) {
80 $this->fSize = floatval($fSize);
81 }
82
83 public function getSize() {
84 return $this->fSize;
85 }
86
87 public function isColorComponent() {
88 return $this->bIsColorComponent;
89 }
90
91 /**
92 * Returns whether the number stored in this Size really represents a size (as in a length of something on screen).
93 * @return false if the unit an angle, a duration, a frequency or the number is a component in a Color object.
94 */
95 public function isSize() {
96 if (in_array($this->sUnit, explode('/', self::NON_SIZE_UNITS))) {
97 return false;
98 }
99 return !$this->isColorComponent();
100 }
101
102 public function isRelative() {
103 if (in_array($this->sUnit, explode('/', self::RELATIVE_SIZE_UNITS))) {
104 return true;
105 }
106 if ($this->sUnit === null && $this->fSize != 0) {
107 return true;
108 }
109 return false;
110 }
111
112 public function __toString() {
113 return $this->render(new \Sabberworm\CSS\OutputFormat());
114 }
115
116 public function render(\Sabberworm\CSS\OutputFormat $oOutputFormat) {
117 $l = localeconv();
118 $sPoint = preg_quote($l['decimal_point'], '/');
119 return preg_replace(array("/$sPoint/", "/^(-?)0\./"), array('.', '$1.'), $this->fSize) . ($this->sUnit === null ? '' : $this->sUnit);
120 }
121
122}