xref: /dokuwiki/inc/Parsing/ParserMode/Preformatted.php (revision eb15e634e1400f6c4d78f5fb40179ca25f41574d) 
1<?php
2
3namespace dokuwiki\Parsing\ParserMode;
4
5use dokuwiki\Parsing\Handler;
6use dokuwiki\Parsing\Handler\Preformatted as PreformattedHandler;
7
8class Preformatted extends AbstractMode
9{
10    /** @inheritdoc */
11    public function getSort()
12    {
13        return 20;
14    }
15
16    /**
17     * Number of leading spaces that trigger a preformatted block.
18     *
19     * DokuWiki's historical value is 2 spaces; Markdown uses 4. When
20     * `$conf['syntax']` is `md` or `md+dw` (Markdown preferred),
21     * we flip to 4 so indented code blocks match GFM. A single tab is
22     * always a trigger regardless of the space threshold.
23     */
24    protected function getIndentWidth(): int
25    {
26        global $conf;
27        return in_array($conf['syntax'], ['md', 'md+dw'], true) ? 4 : 2;
28    }
29
30    /** @inheritdoc */
31    public function connectTo($mode)
32    {
33        $indent = str_repeat(' ', $this->getIndentWidth());
34
35        $this->Lexer->addEntryPattern('\n' . $indent, $mode, 'preformatted');
36        $this->Lexer->addEntryPattern('\n\t', $mode, 'preformatted');
37
38        // match continuation lines inside the preformatted block
39        $this->Lexer->addPattern('\n' . $indent, 'preformatted');
40        $this->Lexer->addPattern('\n\t', 'preformatted');
41    }
42
43    /** @inheritdoc */
44    public function postConnect()
45    {
46        $this->Lexer->addExitPattern('\n', 'preformatted');
47    }
48
49    /** @inheritdoc */
50    public function handle($match, $state, $pos, Handler $handler)
51    {
52        switch ($state) {
53            case DOKU_LEXER_ENTER:
54                $handler->setCallWriter(new PreformattedHandler($handler->getCallWriter()));
55                $handler->addCall('preformatted_start', [], $pos);
56                break;
57            case DOKU_LEXER_EXIT:
58                $handler->addCall('preformatted_end', [], $pos);
59                /** @var PreformattedHandler $reWriter */
60                $reWriter = $handler->getCallWriter();
61                $handler->setCallWriter($reWriter->process());
62                break;
63            case DOKU_LEXER_MATCHED:
64                $handler->addCall('preformatted_newline', [], $pos);
65                break;
66            case DOKU_LEXER_UNMATCHED:
67                $handler->addCall('preformatted_content', [$match], $pos);
68                break;
69        }
70
71        return true;
72    }
73}
74