Verzeichnisstruktur phpBB-3.3.15
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- 28.08.2024
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ModuleNode.php
001 <?php
002
003 /*
004 * This file is part of Twig.
005 *
006 * (c) Fabien Potencier
007 * (c) Armin Ronacher
008 *
009 * For the full copyright and license information, please view the LICENSE
010 * file that was distributed with this source code.
011 */
012
013 namespace Twig\Node;
014
015 use Twig\Compiler;
016 use Twig\Node\Expression\AbstractExpression;
017 use Twig\Node\Expression\ConstantExpression;
018 use Twig\Source;
019
020 /**
021 * Represents a module node.
022 *
023 * Consider this class as being final. If you need to customize the behavior of
024 * the generated class, consider adding nodes to the following nodes: display_start,
025 * display_end, constructor_start, constructor_end, and class_end.
026 *
027 * @author Fabien Potencier <fabien@symfony.com>
028 *
029 * @final since Twig 2.4.0
030 */
031 class ModuleNode extends Node
032 {
033 public function __construct(Node $body, ?AbstractExpression $parent, Node $blocks, Node $macros, Node $traits, $embeddedTemplates, Source $source)
034 {
035 if (__CLASS__ !== static::class) {
036 @trigger_error('Overriding '.__CLASS__.' is deprecated since Twig 2.4.0 and the class will be final in 3.0.', \E_USER_DEPRECATED);
037 }
038
039 $nodes = [
040 'body' => $body,
041 'blocks' => $blocks,
042 'macros' => $macros,
043 'traits' => $traits,
044 'display_start' => new Node(),
045 'display_end' => new Node(),
046 'constructor_start' => new Node(),
047 'constructor_end' => new Node(),
048 'class_end' => new Node(),
049 ];
050 if (null !== $parent) {
051 $nodes['parent'] = $parent;
052 }
053
054 // embedded templates are set as attributes so that they are only visited once by the visitors
055 parent::__construct($nodes, [
056 'index' => null,
057 'embedded_templates' => $embeddedTemplates,
058 ], 1);
059
060 // populate the template name of all node children
061 $this->setSourceContext($source);
062 }
063
064 public function setIndex($index)
065 {
066 $this->setAttribute('index', $index);
067 }
068
069 public function compile(Compiler $compiler)
070 {
071 $this->compileTemplate($compiler);
072
073 foreach ($this->getAttribute('embedded_templates') as $template) {
074 $compiler->subcompile($template);
075 }
076 }
077
078 protected function compileTemplate(Compiler $compiler)
079 {
080 if (!$this->getAttribute('index')) {
081 $compiler->write('<?php');
082 }
083
084 $this->compileClassHeader($compiler);
085
086 $this->compileConstructor($compiler);
087
088 $this->compileGetParent($compiler);
089
090 $this->compileDisplay($compiler);
091
092 $compiler->subcompile($this->getNode('blocks'));
093
094 $this->compileMacros($compiler);
095
096 $this->compileGetTemplateName($compiler);
097
098 $this->compileIsTraitable($compiler);
099
100 $this->compileDebugInfo($compiler);
101
102 $this->compileGetSourceContext($compiler);
103
104 $this->compileClassFooter($compiler);
105 }
106
107 protected function compileGetParent(Compiler $compiler)
108 {
109 if (!$this->hasNode('parent')) {
110 return;
111 }
112 $parent = $this->getNode('parent');
113
114 $compiler
115 ->write("protected function doGetParent(array \$context)\n", "{\n")
116 ->indent()
117 ->addDebugInfo($parent)
118 ->write('return ')
119 ;
120
121 if ($parent instanceof ConstantExpression) {
122 $compiler->subcompile($parent);
123 } else {
124 $compiler
125 ->raw('$this->loadTemplate(')
126 ->subcompile($parent)
127 ->raw(', ')
128 ->repr($this->getSourceContext()->getName())
129 ->raw(', ')
130 ->repr($parent->getTemplateLine())
131 ->raw(')')
132 ;
133 }
134
135 $compiler
136 ->raw(";\n")
137 ->outdent()
138 ->write("}\n\n")
139 ;
140 }
141
142 protected function compileClassHeader(Compiler $compiler)
143 {
144 $compiler
145 ->write("\n\n")
146 ;
147 if (!$this->getAttribute('index')) {
148 $compiler
149 ->write("use Twig\Environment;\n")
150 ->write("use Twig\Error\LoaderError;\n")
151 ->write("use Twig\Error\RuntimeError;\n")
152 ->write("use Twig\Extension\SandboxExtension;\n")
153 ->write("use Twig\Markup;\n")
154 ->write("use Twig\Sandbox\SecurityError;\n")
155 ->write("use Twig\Sandbox\SecurityNotAllowedTagError;\n")
156 ->write("use Twig\Sandbox\SecurityNotAllowedFilterError;\n")
157 ->write("use Twig\Sandbox\SecurityNotAllowedFunctionError;\n")
158 ->write("use Twig\Source;\n")
159 ->write("use Twig\Template;\n\n")
160 ;
161 }
162 $compiler
163 // if the template name contains */, add a blank to avoid a PHP parse error
164 ->write('/* '.str_replace('*/', '* /', $this->getSourceContext()->getName())." */\n")
165 ->write('class '.$compiler->getEnvironment()->getTemplateClass($this->getSourceContext()->getName(), $this->getAttribute('index')))
166 ->raw(sprintf(" extends %s\n", $compiler->getEnvironment()->getBaseTemplateClass(false)))
167 ->write("{\n")
168 ->indent()
169 ->write("private \$source;\n")
170 ->write("private \$macros = [];\n\n")
171 ;
172 }
173
174 protected function compileConstructor(Compiler $compiler)
175 {
176 $compiler
177 ->write("public function __construct(Environment \$env)\n", "{\n")
178 ->indent()
179 ->subcompile($this->getNode('constructor_start'))
180 ->write("parent::__construct(\$env);\n\n")
181 ->write("\$this->source = \$this->getSourceContext();\n\n")
182 ;
183
184 // parent
185 if (!$this->hasNode('parent')) {
186 $compiler->write("\$this->parent = false;\n\n");
187 }
188
189 $countTraits = \count($this->getNode('traits'));
190 if ($countTraits) {
191 // traits
192 foreach ($this->getNode('traits') as $i => $trait) {
193 $node = $trait->getNode('template');
194
195 $compiler
196 ->addDebugInfo($node)
197 ->write(sprintf('$_trait_%s = $this->loadTemplate(', $i))
198 ->subcompile($node)
199 ->raw(', ')
200 ->repr($node->getTemplateName())
201 ->raw(', ')
202 ->repr($node->getTemplateLine())
203 ->raw(");\n")
204 ->write(sprintf("if (!\$_trait_%s->isTraitable()) {\n", $i))
205 ->indent()
206 ->write("throw new RuntimeError('Template \"'.")
207 ->subcompile($trait->getNode('template'))
208 ->raw(".'\" cannot be used as a trait.', ")
209 ->repr($node->getTemplateLine())
210 ->raw(", \$this->source);\n")
211 ->outdent()
212 ->write("}\n")
213 ->write(sprintf("\$_trait_%s_blocks = \$_trait_%s->getBlocks();\n\n", $i, $i))
214 ;
215
216 foreach ($trait->getNode('targets') as $key => $value) {
217 $compiler
218 ->write(sprintf('if (!isset($_trait_%s_blocks[', $i))
219 ->string($key)
220 ->raw("])) {\n")
221 ->indent()
222 ->write("throw new RuntimeError('Block ")
223 ->string($key)
224 ->raw(' is not defined in trait ')
225 ->subcompile($trait->getNode('template'))
226 ->raw(".', ")
227 ->repr($node->getTemplateLine())
228 ->raw(", \$this->source);\n")
229 ->outdent()
230 ->write("}\n\n")
231
232 ->write(sprintf('$_trait_%s_blocks[', $i))
233 ->subcompile($value)
234 ->raw(sprintf('] = $_trait_%s_blocks[', $i))
235 ->string($key)
236 ->raw(sprintf(']; unset($_trait_%s_blocks[', $i))
237 ->string($key)
238 ->raw("]);\n\n")
239 ;
240 }
241 }
242
243 if ($countTraits > 1) {
244 $compiler
245 ->write("\$this->traits = array_merge(\n")
246 ->indent()
247 ;
248
249 for ($i = 0; $i < $countTraits; ++$i) {
250 $compiler
251 ->write(sprintf('$_trait_%s_blocks'.($i == $countTraits - 1 ? '' : ',')."\n", $i))
252 ;
253 }
254
255 $compiler
256 ->outdent()
257 ->write(");\n\n")
258 ;
259 } else {
260 $compiler
261 ->write("\$this->traits = \$_trait_0_blocks;\n\n")
262 ;
263 }
264
265 $compiler
266 ->write("\$this->blocks = array_merge(\n")
267 ->indent()
268 ->write("\$this->traits,\n")
269 ->write("[\n")
270 ;
271 } else {
272 $compiler
273 ->write("\$this->blocks = [\n")
274 ;
275 }
276
277 // blocks
278 $compiler
279 ->indent()
280 ;
281
282 foreach ($this->getNode('blocks') as $name => $node) {
283 $compiler
284 ->write(sprintf("'%s' => [\$this, 'block_%s'],\n", $name, $name))
285 ;
286 }
287
288 if ($countTraits) {
289 $compiler
290 ->outdent()
291 ->write("]\n")
292 ->outdent()
293 ->write(");\n")
294 ;
295 } else {
296 $compiler
297 ->outdent()
298 ->write("];\n")
299 ;
300 }
301
302 $compiler
303 ->subcompile($this->getNode('constructor_end'))
304 ->outdent()
305 ->write("}\n\n")
306 ;
307 }
308
309 protected function compileDisplay(Compiler $compiler)
310 {
311 $compiler
312 ->write("protected function doDisplay(array \$context, array \$blocks = [])\n", "{\n")
313 ->indent()
314 ->write("\$macros = \$this->macros;\n")
315 ->subcompile($this->getNode('display_start'))
316 ->subcompile($this->getNode('body'))
317 ;
318
319 if ($this->hasNode('parent')) {
320 $parent = $this->getNode('parent');
321
322 $compiler->addDebugInfo($parent);
323 if ($parent instanceof ConstantExpression) {
324 $compiler
325 ->write('$this->parent = $this->loadTemplate(')
326 ->subcompile($parent)
327 ->raw(', ')
328 ->repr($this->getSourceContext()->getName())
329 ->raw(', ')
330 ->repr($parent->getTemplateLine())
331 ->raw(");\n")
332 ;
333 $compiler->write('$this->parent');
334 } else {
335 $compiler->write('$this->getParent($context)');
336 }
337 $compiler->raw("->display(\$context, array_merge(\$this->blocks, \$blocks));\n");
338 }
339
340 $compiler
341 ->subcompile($this->getNode('display_end'))
342 ->outdent()
343 ->write("}\n\n")
344 ;
345 }
346
347 protected function compileClassFooter(Compiler $compiler)
348 {
349 $compiler
350 ->subcompile($this->getNode('class_end'))
351 ->outdent()
352 ->write("}\n")
353 ;
354 }
355
356 protected function compileMacros(Compiler $compiler)
357 {
358 $compiler->subcompile($this->getNode('macros'));
359 }
360
361 protected function compileGetTemplateName(Compiler $compiler)
362 {
363 $compiler
364 ->write("public function getTemplateName()\n", "{\n")
365 ->indent()
366 ->write('return ')
367 ->repr($this->getSourceContext()->getName())
368 ->raw(";\n")
369 ->outdent()
370 ->write("}\n\n")
371 ;
372 }
373
374 protected function compileIsTraitable(Compiler $compiler)
375 {
376 // A template can be used as a trait if:
377 // * it has no parent
378 // * it has no macros
379 // * it has no body
380 //
381 // Put another way, a template can be used as a trait if it
382 // only contains blocks and use statements.
383 $traitable = !$this->hasNode('parent') && 0 === \count($this->getNode('macros'));
384 if ($traitable) {
385 if ($this->getNode('body') instanceof BodyNode) {
386 $nodes = $this->getNode('body')->getNode(0);
387 } else {
388 $nodes = $this->getNode('body');
389 }
390
391 if (!\count($nodes)) {
392 $nodes = new Node([$nodes]);
393 }
394
395 foreach ($nodes as $node) {
396 if (!\count($node)) {
397 continue;
398 }
399
400 if ($node instanceof TextNode && ctype_space($node->getAttribute('data'))) {
401 continue;
402 }
403
404 if ($node instanceof BlockReferenceNode) {
405 continue;
406 }
407
408 $traitable = false;
409 break;
410 }
411 }
412
413 if ($traitable) {
414 return;
415 }
416
417 $compiler
418 ->write("public function isTraitable()\n", "{\n")
419 ->indent()
420 ->write(sprintf("return %s;\n", $traitable ? 'true' : 'false'))
421 ->outdent()
422 ->write("}\n\n")
423 ;
424 }
425
426 protected function compileDebugInfo(Compiler $compiler)
427 {
428 $compiler
429 ->write("public function getDebugInfo()\n", "{\n")
430 ->indent()
431 ->write(sprintf("return %s;\n", str_replace("\n", '', var_export(array_reverse($compiler->getDebugInfo(), true), true))))
432 ->outdent()
433 ->write("}\n\n")
434 ;
435 }
436
437 protected function compileGetSourceContext(Compiler $compiler)
438 {
439 $compiler
440 ->write("public function getSourceContext()\n", "{\n")
441 ->indent()
442 ->write('return new Source(')
443 ->string($compiler->getEnvironment()->isDebug() ? $this->getSourceContext()->getCode() : '')
444 ->raw(', ')
445 ->string($this->getSourceContext()->getName())
446 ->raw(', ')
447 ->string($this->getSourceContext()->getPath())
448 ->raw(");\n")
449 ->outdent()
450 ->write("}\n")
451 ;
452 }
453
454 protected function compileLoadTemplate(Compiler $compiler, $node, $var)
455 {
456 if ($node instanceof ConstantExpression) {
457 $compiler
458 ->write(sprintf('%s = $this->loadTemplate(', $var))
459 ->subcompile($node)
460 ->raw(', ')
461 ->repr($node->getTemplateName())
462 ->raw(', ')
463 ->repr($node->getTemplateLine())
464 ->raw(");\n")
465 ;
466 } else {
467 throw new \LogicException('Trait templates can only be constant nodes.');
468 }
469 }
470 }
471
472 class_alias('Twig\Node\ModuleNode', 'Twig_Node_Module');
473