1
|
|
|
<?php |
2
|
|
|
|
3
|
|
|
/* |
4
|
|
|
* This file is part of the league/commonmark package. |
5
|
|
|
* |
6
|
|
|
* (c) Colin O'Dell <[email protected]> |
7
|
|
|
* |
8
|
|
|
* Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js) |
9
|
|
|
* - (c) John MacFarlane |
10
|
|
|
* |
11
|
|
|
* For the full copyright and license information, please view the LICENSE |
12
|
|
|
* file that was distributed with this source code. |
13
|
|
|
*/ |
14
|
|
|
|
15
|
|
|
namespace League\CommonMark\Block\Parser; |
16
|
|
|
|
17
|
|
|
use League\CommonMark\Block\Element\ListBlock; |
18
|
|
|
use League\CommonMark\Block\Element\ListData; |
19
|
|
|
use League\CommonMark\Block\Element\ListItem; |
20
|
|
|
use League\CommonMark\Block\Element\Paragraph; |
21
|
|
|
use League\CommonMark\ContextInterface; |
22
|
|
|
use League\CommonMark\Cursor; |
23
|
|
|
use League\CommonMark\Util\RegexHelper; |
24
|
|
|
|
25
|
|
|
class ListParser extends AbstractBlockParser |
26
|
|
|
{ |
27
|
|
|
/** |
28
|
|
|
* @param ContextInterface $context |
29
|
|
|
* @param Cursor $cursor |
30
|
|
|
* |
31
|
|
|
* @return bool |
32
|
|
|
*/ |
33
|
1716 |
|
public function parse(ContextInterface $context, Cursor $cursor) |
34
|
|
|
{ |
35
|
1716 |
|
if ($cursor->isIndented() && !($context->getContainer() instanceof ListBlock)) { |
36
|
168 |
|
return false; |
37
|
|
|
} |
38
|
|
|
|
39
|
1653 |
|
$tmpCursor = clone $cursor; |
40
|
1653 |
|
$tmpCursor->advanceToNextNonSpaceOrTab(); |
41
|
1653 |
|
$rest = $tmpCursor->getRemainder(); |
42
|
|
|
|
43
|
1653 |
|
$data = new ListData(); |
44
|
1653 |
|
$data->markerOffset = $cursor->getIndent(); |
45
|
|
|
|
46
|
1653 |
|
if (preg_match('/^[*+-]/', $rest) === 1) { |
47
|
405 |
|
$data->type = ListBlock::TYPE_UNORDERED; |
48
|
405 |
|
$data->delimiter = null; |
49
|
405 |
|
$data->bulletChar = $rest[0]; |
50
|
405 |
|
$markerLength = 1; |
51
|
1527 |
|
} elseif (($matches = RegexHelper::matchAll('/^(\d{1,9})([.)])/', $rest)) && (!($context->getContainer() instanceof Paragraph) || $matches[1] === '1')) { |
52
|
84 |
|
$data->type = ListBlock::TYPE_ORDERED; |
53
|
84 |
|
$data->start = (int) $matches[1]; |
54
|
84 |
|
$data->delimiter = $matches[2]; |
55
|
84 |
|
$data->bulletChar = null; |
56
|
84 |
|
$markerLength = strlen($matches[0]); |
57
|
28 |
|
} else { |
58
|
1464 |
|
return false; |
59
|
|
|
} |
60
|
|
|
|
61
|
|
|
// Make sure we have spaces after |
62
|
468 |
|
$nextChar = $tmpCursor->peek($markerLength); |
63
|
468 |
|
if (!($nextChar === null || $nextChar === "\t" || $nextChar === ' ')) { |
64
|
228 |
|
return false; |
65
|
|
|
} |
66
|
|
|
|
67
|
|
|
// If it interrupts paragraph, make sure first line isn't blank |
68
|
243 |
|
$container = $context->getContainer(); |
69
|
243 |
|
if ($container instanceof Paragraph && !RegexHelper::matchAt(RegexHelper::REGEX_NON_SPACE, $rest, $markerLength)) { |
|
|
|
|
70
|
6 |
|
return false; |
71
|
|
|
} |
72
|
|
|
|
73
|
|
|
// We've got a match! Advance offset and calculate padding |
74
|
237 |
|
$cursor->advanceToNextNonSpaceOrTab(); // to start of marker |
75
|
237 |
|
$cursor->advanceBy($markerLength, true); // to end of marker |
76
|
237 |
|
$data->padding = $this->calculateListMarkerPadding($cursor, $markerLength); |
77
|
|
|
|
78
|
|
|
// add the list if needed |
79
|
237 |
|
if (!$container || !($container instanceof ListBlock) || !$data->equals($container->getListData())) { |
80
|
237 |
|
$context->addBlock(new ListBlock($data)); |
81
|
79 |
|
} |
82
|
|
|
|
83
|
|
|
// add the list item |
84
|
237 |
|
$context->addBlock(new ListItem($data)); |
85
|
|
|
|
86
|
237 |
|
return true; |
87
|
|
|
} |
88
|
|
|
|
89
|
|
|
/** |
90
|
|
|
* @param Cursor $cursor |
91
|
|
|
* @param int $markerLength |
92
|
|
|
* |
93
|
|
|
* @return int |
94
|
|
|
*/ |
95
|
237 |
|
private function calculateListMarkerPadding(Cursor $cursor, $markerLength) |
96
|
|
|
{ |
97
|
237 |
|
$start = $cursor->saveState(); |
98
|
237 |
|
$spacesStartCol = $cursor->getColumn(); |
99
|
|
|
|
100
|
237 |
|
while ($cursor->getColumn() - $spacesStartCol < 5) { |
101
|
237 |
|
if (!$cursor->advanceBySpaceOrTab()) { |
102
|
228 |
|
break; |
103
|
|
|
} |
104
|
76 |
|
} |
105
|
|
|
|
106
|
237 |
|
$blankItem = $cursor->peek() === null; |
107
|
237 |
|
$spacesAfterMarker = $cursor->getColumn() - $spacesStartCol; |
108
|
|
|
|
109
|
237 |
|
if ($spacesAfterMarker >= 5 || $spacesAfterMarker < 1 || $blankItem) { |
110
|
72 |
|
$cursor->restoreState($start); |
111
|
72 |
|
$cursor->advanceBySpaceOrTab(); |
112
|
|
|
|
113
|
72 |
|
return $markerLength + 1; |
114
|
|
|
} |
115
|
|
|
|
116
|
180 |
|
return $markerLength + $spacesAfterMarker; |
117
|
|
|
} |
118
|
|
|
} |
119
|
|
|
|
In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
integer
values, zero is a special case, in particular the following results might be unexpected: