]>
Commit | Line | Data |
---|---|---|
a4565e88 NL |
1 | <?php |
2 | ||
3 | /* | |
4 | * This file is part of Twig. | |
5 | * | |
6 | * (c) 2009 Fabien Potencier | |
7 | * (c) 2009 Armin Ronacher | |
8 | * | |
9 | * For the full copyright and license information, please view the LICENSE | |
10 | * file that was distributed with this source code. | |
11 | */ | |
12 | ||
13 | /** | |
14 | * Marks a section of a template as being reusable. | |
15 | * | |
16 | * <pre> | |
17 | * {% block head %} | |
18 | * <link rel="stylesheet" href="style.css" /> | |
19 | * <title>{% block title %}{% endblock %} - My Webpage</title> | |
20 | * {% endblock %} | |
21 | * </pre> | |
22 | */ | |
23 | class Twig_TokenParser_Block extends Twig_TokenParser | |
24 | { | |
25 | /** | |
26 | * Parses a token and returns a node. | |
27 | * | |
28 | * @param Twig_Token $token A Twig_Token instance | |
29 | * | |
30 | * @return Twig_NodeInterface A Twig_NodeInterface instance | |
31 | */ | |
32 | public function parse(Twig_Token $token) | |
33 | { | |
34 | $lineno = $token->getLine(); | |
35 | $stream = $this->parser->getStream(); | |
36 | $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue(); | |
37 | if ($this->parser->hasBlock($name)) { | |
38 | throw new Twig_Error_Syntax(sprintf("The block '$name' has already been defined line %d", $this->parser->getBlock($name)->getLine()), $stream->getCurrent()->getLine(), $stream->getFilename()); | |
39 | } | |
40 | $this->parser->setBlock($name, $block = new Twig_Node_Block($name, new Twig_Node(array()), $lineno)); | |
41 | $this->parser->pushLocalScope(); | |
42 | $this->parser->pushBlockStack($name); | |
43 | ||
44 | if ($stream->test(Twig_Token::BLOCK_END_TYPE)) { | |
45 | $stream->next(); | |
46 | ||
47 | $body = $this->parser->subparse(array($this, 'decideBlockEnd'), true); | |
48 | if ($stream->test(Twig_Token::NAME_TYPE)) { | |
49 | $value = $stream->next()->getValue(); | |
50 | ||
51 | if ($value != $name) { | |
52 | throw new Twig_Error_Syntax(sprintf("Expected endblock for block '$name' (but %s given)", $value), $stream->getCurrent()->getLine(), $stream->getFilename()); | |
53 | } | |
54 | } | |
55 | } else { | |
56 | $body = new Twig_Node(array( | |
57 | new Twig_Node_Print($this->parser->getExpressionParser()->parseExpression(), $lineno), | |
58 | )); | |
59 | } | |
60 | $stream->expect(Twig_Token::BLOCK_END_TYPE); | |
61 | ||
62 | $block->setNode('body', $body); | |
63 | $this->parser->popBlockStack(); | |
64 | $this->parser->popLocalScope(); | |
65 | ||
66 | return new Twig_Node_BlockReference($name, $lineno, $this->getTag()); | |
67 | } | |
68 | ||
69 | public function decideBlockEnd(Twig_Token $token) | |
70 | { | |
71 | return $token->test('endblock'); | |
72 | } | |
73 | ||
74 | /** | |
75 | * Gets the tag name associated with this token parser. | |
76 | * | |
77 | * @return string The tag name | |
78 | */ | |
79 | public function getTag() | |
80 | { | |
81 | return 'block'; | |
82 | } | |
83 | } |