Verzeichnisstruktur phpBB-3.1.0
- Veröffentlicht
- 27.10.2014
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If.php
01 <?php
02
03 /*
04 * This file is part of Twig.
05 *
06 * (c) 2009 Fabien Potencier
07 * (c) 2009 Armin Ronacher
08 *
09 * For the full copyright and license information, please view the LICENSE
10 * file that was distributed with this source code.
11 */
12
13 /**
14 * Tests a condition.
15 *
16 * <pre>
17 * {% if users %}
18 * <ul>
19 * {% for user in users %}
20 * <li>{{ user.username|e }}</li>
21 * {% endfor %}
22 * </ul>
23 * {% endif %}
24 * </pre>
25 */
26 class Twig_TokenParser_If extends Twig_TokenParser
27 {
28 /**
29 * Parses a token and returns a node.
30 *
31 * @param Twig_Token $token A Twig_Token instance
32 *
33 * @return Twig_NodeInterface A Twig_NodeInterface instance
34 */
35 public function parse(Twig_Token $token)
36 {
37 $lineno = $token->getLine();
38 $expr = $this->parser->getExpressionParser()->parseExpression();
39 $stream = $this->parser->getStream();
40 $stream->expect(Twig_Token::BLOCK_END_TYPE);
41 $body = $this->parser->subparse(array($this, 'decideIfFork'));
42 $tests = array($expr, $body);
43 $else = null;
44
45 $end = false;
46 while (!$end) {
47 switch ($stream->next()->getValue()) {
48 case 'else':
49 $stream->expect(Twig_Token::BLOCK_END_TYPE);
50 $else = $this->parser->subparse(array($this, 'decideIfEnd'));
51 break;
52
53 case 'elseif':
54 $expr = $this->parser->getExpressionParser()->parseExpression();
55 $stream->expect(Twig_Token::BLOCK_END_TYPE);
56 $body = $this->parser->subparse(array($this, 'decideIfFork'));
57 $tests[] = $expr;
58 $tests[] = $body;
59 break;
60
61 case 'endif':
62 $end = true;
63 break;
64
65 default:
66 throw new Twig_Error_Syntax(sprintf('Unexpected end of template. Twig was looking for the following tags "else", "elseif", or "endif" to close the "if" block started at line %d)', $lineno), $stream->getCurrent()->getLine(), $stream->getFilename());
67 }
68 }
69
70 $stream->expect(Twig_Token::BLOCK_END_TYPE);
71
72 return new Twig_Node_If(new Twig_Node($tests), $else, $lineno, $this->getTag());
73 }
74
75 public function decideIfFork(Twig_Token $token)
76 {
77 return $token->test(array('elseif', 'else', 'endif'));
78 }
79
80 public function decideIfEnd(Twig_Token $token)
81 {
82 return $token->test(array('endif'));
83 }
84
85 /**
86 * Gets the tag name associated with this token parser.
87 *
88 * @return string The tag name
89 */
90 public function getTag()
91 {
92 return 'if';
93 }
94 }
95