Verzeichnisstruktur phpBB-3.2.0
- Veröffentlicht
- 06.01.2017
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Compiler.php
001 <?php
002
003 /*
004 * This file is part of Twig.
005 *
006 * (c) 2009 Fabien Potencier
007 * (c) 2009 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 /**
014 * Compiles a node to PHP code.
015 *
016 * @author Fabien Potencier <fabien@symfony.com>
017 */
018 class Twig_Compiler implements Twig_CompilerInterface
019 {
020 protected $lastLine;
021 protected $source;
022 protected $indentation;
023 protected $env;
024 protected $debugInfo = array();
025 protected $sourceOffset;
026 protected $sourceLine;
027 protected $filename;
028
029 /**
030 * Constructor.
031 *
032 * @param Twig_Environment $env The twig environment instance
033 */
034 public function __construct(Twig_Environment $env)
035 {
036 $this->env = $env;
037 }
038
039 public function getFilename()
040 {
041 return $this->filename;
042 }
043
044 /**
045 * Returns the environment instance related to this compiler.
046 *
047 * @return Twig_Environment The environment instance
048 */
049 public function getEnvironment()
050 {
051 return $this->env;
052 }
053
054 /**
055 * Gets the current PHP code after compilation.
056 *
057 * @return string The PHP code
058 */
059 public function getSource()
060 {
061 return $this->source;
062 }
063
064 /**
065 * Compiles a node.
066 *
067 * @param Twig_NodeInterface $node The node to compile
068 * @param int $indentation The current indentation
069 *
070 * @return Twig_Compiler The current compiler instance
071 */
072 public function compile(Twig_NodeInterface $node, $indentation = 0)
073 {
074 $this->lastLine = null;
075 $this->source = '';
076 $this->debugInfo = array();
077 $this->sourceOffset = 0;
078 // source code starts at 1 (as we then increment it when we encounter new lines)
079 $this->sourceLine = 1;
080 $this->indentation = $indentation;
081
082 if ($node instanceof Twig_Node_Module) {
083 $this->filename = $node->getAttribute('filename');
084 }
085
086 $node->compile($this);
087
088 return $this;
089 }
090
091 public function subcompile(Twig_NodeInterface $node, $raw = true)
092 {
093 if (false === $raw) {
094 $this->addIndentation();
095 }
096
097 $node->compile($this);
098
099 return $this;
100 }
101
102 /**
103 * Adds a raw string to the compiled code.
104 *
105 * @param string $string The string
106 *
107 * @return Twig_Compiler The current compiler instance
108 */
109 public function raw($string)
110 {
111 $this->source .= $string;
112
113 return $this;
114 }
115
116 /**
117 * Writes a string to the compiled code by adding indentation.
118 *
119 * @return Twig_Compiler The current compiler instance
120 */
121 public function write()
122 {
123 $strings = func_get_args();
124 foreach ($strings as $string) {
125 $this->addIndentation();
126 $this->source .= $string;
127 }
128
129 return $this;
130 }
131
132 /**
133 * Appends an indentation to the current PHP code after compilation.
134 *
135 * @return Twig_Compiler The current compiler instance
136 */
137 public function addIndentation()
138 {
139 $this->source .= str_repeat(' ', $this->indentation * 4);
140
141 return $this;
142 }
143
144 /**
145 * Adds a quoted string to the compiled code.
146 *
147 * @param string $value The string
148 *
149 * @return Twig_Compiler The current compiler instance
150 */
151 public function string($value)
152 {
153 $this->source .= sprintf('"%s"', addcslashes($value, "\0\t\"\$\\"));
154
155 return $this;
156 }
157
158 /**
159 * Returns a PHP representation of a given value.
160 *
161 * @param mixed $value The value to convert
162 *
163 * @return Twig_Compiler The current compiler instance
164 */
165 public function repr($value)
166 {
167 if (is_int($value) || is_float($value)) {
168 if (false !== $locale = setlocale(LC_NUMERIC, 0)) {
169 setlocale(LC_NUMERIC, 'C');
170 }
171
172 $this->raw($value);
173
174 if (false !== $locale) {
175 setlocale(LC_NUMERIC, $locale);
176 }
177 } elseif (null === $value) {
178 $this->raw('null');
179 } elseif (is_bool($value)) {
180 $this->raw($value ? 'true' : 'false');
181 } elseif (is_array($value)) {
182 $this->raw('array(');
183 $first = true;
184 foreach ($value as $key => $v) {
185 if (!$first) {
186 $this->raw(', ');
187 }
188 $first = false;
189 $this->repr($key);
190 $this->raw(' => ');
191 $this->repr($v);
192 }
193 $this->raw(')');
194 } else {
195 $this->string($value);
196 }
197
198 return $this;
199 }
200
201 /**
202 * Adds debugging information.
203 *
204 * @param Twig_NodeInterface $node The related twig node
205 *
206 * @return Twig_Compiler The current compiler instance
207 */
208 public function addDebugInfo(Twig_NodeInterface $node)
209 {
210 if ($node->getLine() != $this->lastLine) {
211 $this->write(sprintf("// line %d\n", $node->getLine()));
212
213 // when mbstring.func_overload is set to 2
214 // mb_substr_count() replaces substr_count()
215 // but they have different signatures!
216 if (((int) ini_get('mbstring.func_overload')) & 2) {
217 // this is much slower than the "right" version
218 $this->sourceLine += mb_substr_count(mb_substr($this->source, $this->sourceOffset), "\n");
219 } else {
220 $this->sourceLine += substr_count($this->source, "\n", $this->sourceOffset);
221 }
222 $this->sourceOffset = strlen($this->source);
223 $this->debugInfo[$this->sourceLine] = $node->getLine();
224
225 $this->lastLine = $node->getLine();
226 }
227
228 return $this;
229 }
230
231 public function getDebugInfo()
232 {
233 ksort($this->debugInfo);
234
235 return $this->debugInfo;
236 }
237
238 /**
239 * Indents the generated code.
240 *
241 * @param int $step The number of indentation to add
242 *
243 * @return Twig_Compiler The current compiler instance
244 */
245 public function indent($step = 1)
246 {
247 $this->indentation += $step;
248
249 return $this;
250 }
251
252 /**
253 * Outdents the generated code.
254 *
255 * @param int $step The number of indentation to remove
256 *
257 * @return Twig_Compiler The current compiler instance
258 *
259 * @throws LogicException When trying to outdent too much so the indentation would become negative
260 */
261 public function outdent($step = 1)
262 {
263 // can't outdent by more steps than the current indentation level
264 if ($this->indentation < $step) {
265 throw new LogicException('Unable to call outdent() as the indentation would become negative');
266 }
267
268 $this->indentation -= $step;
269
270 return $this;
271 }
272
273 public function getVarName()
274 {
275 return sprintf('__internal_%s', hash('sha256', uniqid(mt_rand(), true), false));
276 }
277 }
278