ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
Number.php
Go to the documentation of this file.
1<?php
2
7{
8
13 protected $non_negative = false;
14
18 public function __construct($non_negative = false)
19 {
20 $this->non_negative = $non_negative;
21 }
22
31 public function validate($number, $config, $context)
32 {
33 $number = $this->parseCDATA($number);
34
35 if ($number === '') {
36 return false;
37 }
38 if ($number === '0') {
39 return '0';
40 }
41
42 $sign = '';
43 switch ($number[0]) {
44 case '-':
45 if ($this->non_negative) {
46 return false;
47 }
48 $sign = '-';
49 case '+':
50 $number = substr($number, 1);
51 }
52
53 if (ctype_digit($number)) {
54 $number = ltrim($number, '0');
55 return $number ? $sign . $number : '0';
56 }
57
58 // Period is the only non-numeric character allowed
59 if (strpos($number, '.') === false) {
60 return false;
61 }
62
63 list($left, $right) = explode('.', $number, 2);
64
65 if ($left === '' && $right === '') {
66 return false;
67 }
68 if ($left !== '' && !ctype_digit($left)) {
69 return false;
70 }
71
72 $left = ltrim($left, '0');
73 $right = rtrim($right, '0');
74
75 if ($right === '') {
76 return $left ? $sign . $left : '0';
77 } elseif (!ctype_digit($right)) {
78 return false;
79 }
80 return $sign . $left . '.' . $right;
81 }
82}
83
84// vim: et sw=4 sts=4
Validates a number as defined by the CSS spec.
Definition: Number.php:7
validate($number, $config, $context)
Definition: Number.php:31
$non_negative
Indicates whether or not only positive values are allowed.
Definition: Number.php:13
__construct($non_negative=false)
Definition: Number.php:18
Base class for all validating attribute definitions.
Definition: AttrDef.php:14
parseCDATA($string)
Convenience method that parses a string as if it were CDATA.
Definition: AttrDef.php:60