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  1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (http://nette.org)
  5:  *
  6:  * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
  7:  *
  8:  * For the full copyright and license information, please view
  9:  * the file license.txt that was distributed with this source code.
 10:  */
 11: 
 12: namespace Nette\Templating;
 13: 
 14: use Nette,
 15:     Nette\Caching;
 16: 
 17: 
 18: 
 19: /**
 20:  * Template.
 21:  *
 22:  * @author     David Grudl
 23:  */
 24: class Template extends Nette\Object implements ITemplate
 25: {
 26:     /** @var array of function(Template $sender); Occurs before a template is compiled - implement to customize the filters */
 27:     public $onPrepareFilters = array();
 28: 
 29:     /** @var string */
 30:     private $source;
 31: 
 32:     /** @var array */
 33:     private $params = array();
 34: 
 35:     /** @var array compile-time filters */
 36:     private $filters = array();
 37: 
 38:     /** @var array run-time helpers */
 39:     private $helpers = array();
 40: 
 41:     /** @var array */
 42:     private $helperLoaders = array();
 43: 
 44:     /** @var Nette\Caching\IStorage */
 45:     private $cacheStorage;
 46: 
 47: 
 48: 
 49:     /**
 50:      * Sets template source code.
 51:      * @param  string
 52:      * @return Template  provides a fluent interface
 53:      */
 54:     public function setSource($source)
 55:     {
 56:         $this->source = $source;
 57:         return $this;
 58:     }
 59: 
 60: 
 61: 
 62:     /**
 63:      * Returns template source code.
 64:      * @return source
 65:      */
 66:     public function getSource()
 67:     {
 68:         return $this->source;
 69:     }
 70: 
 71: 
 72: 
 73:     /********************* rendering ****************d*g**/
 74: 
 75: 
 76: 
 77:     /**
 78:      * Renders template to output.
 79:      * @return void
 80:      */
 81:     public function render()
 82:     {
 83:         $cache = new Caching\Cache($storage = $this->getCacheStorage(), 'Nette.Template');
 84:         $cached = $compiled = $cache->load($this->source);
 85: 
 86:         if ($compiled === NULL) {
 87:             $compiled = $this->compile();
 88:             $cache->save($this->source, $compiled, array(Caching\Cache::CONSTS => 'Nette\Framework::REVISION'));
 89:             $cached = $cache->load($this->source);
 90:         }
 91: 
 92:         if ($cached !== NULL && $storage instanceof Caching\Storages\PhpFileStorage) {
 93:             Nette\Utils\LimitedScope::load($cached['file'], $this->getParameters());
 94:         } else {
 95:             Nette\Utils\LimitedScope::evaluate($compiled, $this->getParameters());
 96:         }
 97:     }
 98: 
 99: 
100: 
101:     /**
102:      * Renders template to file.
103:      * @param  string
104:      * @return void
105:      */
106:     public function save($file)
107:     {
108:         if (file_put_contents($file, $this->__toString(TRUE)) === FALSE) {
109:             throw new Nette\IOException("Unable to save file '$file'.");
110:         }
111:     }
112: 
113: 
114: 
115:     /**
116:      * Renders template to string.
117:      * @param  bool  can throw exceptions? (hidden parameter)
118:      * @return string
119:      */
120:     public function __toString()
121:     {
122:         $args = func_get_args();
123:         ob_start();
124:         try {
125:             $this->render();
126:             return ob_get_clean();
127: 
128:         } catch (\Exception $e) {
129:             ob_end_clean();
130:             if ($args && $args[0]) {
131:                 throw $e;
132:             } else {
133:                 Nette\Diagnostics\Debugger::toStringException($e);
134:             }
135:         }
136:     }
137: 
138: 
139: 
140:     /**
141:      * Applies filters on template content.
142:      * @return string
143:      */
144:     public function compile()
145:     {
146:         if (!$this->filters) {
147:             $this->onPrepareFilters($this);
148:         }
149: 
150:         $code = $this->getSource();
151:         foreach ($this->filters as $filter) {
152:             $code = self::extractPhp($code, $blocks);
153:             $code = $filter($code);
154:             $code = strtr($code, $blocks); // put PHP code back
155:         }
156: 
157:         return Helpers::optimizePhp($code);
158:     }
159: 
160: 
161: 
162:     /********************* template filters & helpers ****************d*g**/
163: 
164: 
165: 
166:     /**
167:      * Registers callback as template compile-time filter.
168:      * @param  callback
169:      * @return Template  provides a fluent interface
170:      */
171:     public function registerFilter($callback)
172:     {
173:         $callback = callback($callback);
174:         if (in_array($callback, $this->filters)) {
175:             throw new Nette\InvalidStateException("Filter '$callback' was registered twice.");
176:         }
177:         $this->filters[] = $callback;
178:         return $this;
179:     }
180: 
181: 
182: 
183:     /**
184:      * Returns all registered compile-time filters.
185:      * @return array
186:      */
187:     final public function getFilters()
188:     {
189:         return $this->filters;
190:     }
191: 
192: 
193: 
194:     /**
195:      * Registers callback as template run-time helper.
196:      * @param  string
197:      * @param  callback
198:      * @return Template  provides a fluent interface
199:      */
200:     public function registerHelper($name, $callback)
201:     {
202:         $this->helpers[strtolower($name)] = callback($callback);
203:         return $this;
204:     }
205: 
206: 
207: 
208:     /**
209:      * Registers callback as template run-time helpers loader.
210:      * @param  callback
211:      * @return Template  provides a fluent interface
212:      */
213:     public function registerHelperLoader($callback)
214:     {
215:         $this->helperLoaders[] = callback($callback);
216:         return $this;
217:     }
218: 
219: 
220: 
221:     /**
222:      * Returns all registered run-time helpers.
223:      * @return array
224:      */
225:     final public function getHelpers()
226:     {
227:         return $this->helpers;
228:     }
229: 
230: 
231: 
232:     /**
233:      * Call a template run-time helper. Do not call directly.
234:      * @param  string  helper name
235:      * @param  array   arguments
236:      * @return mixed
237:      */
238:     public function __call($name, $args)
239:     {
240:         $lname = strtolower($name);
241:         if (!isset($this->helpers[$lname])) {
242:             foreach ($this->helperLoaders as $loader) {
243:                 $helper = $loader($lname);
244:                 if ($helper) {
245:                     $this->registerHelper($lname, $helper);
246:                     return $this->helpers[$lname]->invokeArgs($args);
247:                 }
248:             }
249:             return parent::__call($name, $args);
250:         }
251: 
252:         return $this->helpers[$lname]->invokeArgs($args);
253:     }
254: 
255: 
256: 
257:     /**
258:      * Sets translate adapter.
259:      * @param  Nette\Localization\ITranslator
260:      * @return Template  provides a fluent interface
261:      */
262:     public function setTranslator(Nette\Localization\ITranslator $translator = NULL)
263:     {
264:         $this->registerHelper('translate', $translator === NULL ? NULL : array($translator, 'translate'));
265:         return $this;
266:     }
267: 
268: 
269: 
270:     /********************* template parameters ****************d*g**/
271: 
272: 
273: 
274:     /**
275:      * Adds new template parameter.
276:      * @param  string  name
277:      * @param  mixed   value
278:      * @return Template  provides a fluent interface
279:      */
280:     public function add($name, $value)
281:     {
282:         if (array_key_exists($name, $this->params)) {
283:             throw new Nette\InvalidStateException("The variable '$name' already exists.");
284:         }
285: 
286:         $this->params[$name] = $value;
287:         return $this;
288:     }
289: 
290: 
291: 
292:     /**
293:      * Sets all parameters.
294:      * @param  array
295:      * @return Template  provides a fluent interface
296:      */
297:     public function setParameters(array $params)
298:     {
299:         $this->params = $params + $this->params;
300:         return $this;
301:     }
302: 
303: 
304: 
305:     /**
306:      * Returns array of all parameters.
307:      * @return array
308:      */
309:     public function getParameters()
310:     {
311:         $this->params['template'] = $this;
312:         return $this->params;
313:     }
314: 
315: 
316: 
317:     /** @deprecated */
318:     function setParams(array $params)
319:     {
320:         trigger_error(__METHOD__ . '() is deprecated; use setParameters() instead.', E_USER_WARNING);
321:         return $this->setParameters($params);
322:     }
323: 
324: 
325: 
326:     /** @deprecated */
327:     function getParams()
328:     {
329:         trigger_error(__METHOD__ . '() is deprecated; use getParameters() instead.', E_USER_WARNING);
330:         return $this->getParameters();
331:     }
332: 
333: 
334: 
335:     /**
336:      * Sets a template parameter. Do not call directly.
337:      * @param  string  name
338:      * @param  mixed   value
339:      * @return void
340:      */
341:     public function __set($name, $value)
342:     {
343:         $this->params[$name] = $value;
344:     }
345: 
346: 
347: 
348:     /**
349:      * Returns a template parameter. Do not call directly.
350:      * @param  string  name
351:      * @return mixed  value
352:      */
353:     public function &__get($name)
354:     {
355:         if (!array_key_exists($name, $this->params)) {
356:             trigger_error("The variable '$name' does not exist in template.", E_USER_NOTICE);
357:         }
358: 
359:         return $this->params[$name];
360:     }
361: 
362: 
363: 
364:     /**
365:      * Determines whether parameter is defined. Do not call directly.
366:      * @param  string    name
367:      * @return bool
368:      */
369:     public function __isset($name)
370:     {
371:         return isset($this->params[$name]);
372:     }
373: 
374: 
375: 
376:     /**
377:      * Removes a template parameter. Do not call directly.
378:      * @param  string    name
379:      * @return void
380:      */
381:     public function __unset($name)
382:     {
383:         unset($this->params[$name]);
384:     }
385: 
386: 
387: 
388:     /********************* caching ****************d*g**/
389: 
390: 
391: 
392:     /**
393:      * Set cache storage.
394:      * @param  Nette\Caching\Cache
395:      * @return Template  provides a fluent interface
396:      */
397:     public function setCacheStorage(Caching\IStorage $storage)
398:     {
399:         $this->cacheStorage = $storage;
400:         return $this;
401:     }
402: 
403: 
404: 
405:     /**
406:      * @return Nette\Caching\IStorage
407:      */
408:     public function getCacheStorage()
409:     {
410:         if ($this->cacheStorage === NULL) {
411:             return new Caching\Storages\DevNullStorage;
412:         }
413:         return $this->cacheStorage;
414:     }
415: 
416: 
417: 
418:     /********************* tools ****************d*g**/
419: 
420: 
421: 
422:     /**
423:      * Extracts all blocks of PHP code.
424:      * @param  string
425:      * @param  array
426:      * @return string
427:      */
428:     private static function extractPhp($source, & $blocks)
429:     {
430:         $res = '';
431:         $blocks = array();
432:         $tokens = token_get_all($source);
433:         foreach ($tokens as $n => $token) {
434:             if (is_array($token)) {
435:                 if ($token[0] === T_INLINE_HTML || $token[0] === T_CLOSE_TAG) {
436:                     $res .= $token[1];
437:                     continue;
438: 
439:                 } elseif ($token[0] === T_OPEN_TAG && $token[1] === '<?' && isset($tokens[$n+1][1]) && $tokens[$n+1][1] === 'xml') {
440:                     $php = & $res;
441:                     $token[1] = '<<?php ?>?';
442: 
443:                 } elseif ($token[0] === T_OPEN_TAG || $token[0] === T_OPEN_TAG_WITH_ECHO) {
444:                     $res .= $id = "<?php \x01@php:p" . count($blocks) . "@\x02";
445:                     $php = & $blocks[$id];
446:                 }
447:                 $php .= $token[1];
448: 
449:             } else {
450:                 $php .= $token;
451:             }
452:         }
453:         return $res;
454:     }
455: 
456: }
457: 
Nette Framework 2.0.0 API API documentation generated by ApiGen 2.7.0