Verzeichnisstruktur phpBB-3.1.0
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- 27.10.2014
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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;
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 $this->debugInfo = array();
038 }
039
040 public function getFilename()
041 {
042 return $this->filename;
043 }
044
045 /**
046 * Returns the environment instance related to this compiler.
047 *
048 * @return Twig_Environment The environment instance
049 */
050 public function getEnvironment()
051 {
052 return $this->env;
053 }
054
055 /**
056 * Gets the current PHP code after compilation.
057 *
058 * @return string The PHP code
059 */
060 public function getSource()
061 {
062 return $this->source;
063 }
064
065 /**
066 * Compiles a node.
067 *
068 * @param Twig_NodeInterface $node The node to compile
069 * @param integer $indentation The current indentation
070 *
071 * @return Twig_Compiler The current compiler instance
072 */
073 public function compile(Twig_NodeInterface $node, $indentation = 0)
074 {
075 $this->lastLine = null;
076 $this->source = '';
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 $i = 0;
184 foreach ($value as $key => $value) {
185 if ($i++) {
186 $this->raw(', ');
187 }
188 $this->repr($key);
189 $this->raw(' => ');
190 $this->repr($value);
191 }
192 $this->raw(')');
193 } else {
194 $this->string($value);
195 }
196
197 return $this;
198 }
199
200 /**
201 * Adds debugging information.
202 *
203 * @param Twig_NodeInterface $node The related twig node
204 *
205 * @return Twig_Compiler The current compiler instance
206 */
207 public function addDebugInfo(Twig_NodeInterface $node)
208 {
209 if ($node->getLine() != $this->lastLine) {
210 $this->write("// line {$node->getLine()}\n");
211
212 // when mbstring.func_overload is set to 2
213 // mb_substr_count() replaces substr_count()
214 // but they have different signatures!
215 if (((int) ini_get('mbstring.func_overload')) & 2) {
216 // this is much slower than the "right" version
217 $this->sourceLine += mb_substr_count(mb_substr($this->source, $this->sourceOffset), "\n");
218 } else {
219 $this->sourceLine += substr_count($this->source, "\n", $this->sourceOffset);
220 }
221 $this->sourceOffset = strlen($this->source);
222 $this->debugInfo[$this->sourceLine] = $node->getLine();
223
224 $this->lastLine = $node->getLine();
225 }
226
227 return $this;
228 }
229
230 public function getDebugInfo()
231 {
232 return $this->debugInfo;
233 }
234
235 /**
236 * Indents the generated code.
237 *
238 * @param integer $step The number of indentation to add
239 *
240 * @return Twig_Compiler The current compiler instance
241 */
242 public function indent($step = 1)
243 {
244 $this->indentation += $step;
245
246 return $this;
247 }
248
249 /**
250 * Outdents the generated code.
251 *
252 * @param integer $step The number of indentation to remove
253 *
254 * @return Twig_Compiler The current compiler instance
255 */
256 public function outdent($step = 1)
257 {
258 // can't outdent by more steps than the current indentation level
259 if ($this->indentation < $step) {
260 throw new LogicException('Unable to call outdent() as the indentation would become negative');
261 }
262
263 $this->indentation -= $step;
264
265 return $this;
266 }
267 }
268