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- 06.01.2017
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OutputFormatter.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\Console\Formatter;
013
014 use Symfony\Component\Console\Exception\InvalidArgumentException;
015
016 /**
017 * Formatter class for console output.
018 *
019 * @author Konstantin Kudryashov <ever.zet@gmail.com>
020 */
021 class OutputFormatter implements OutputFormatterInterface
022 {
023 private $decorated;
024 private $styles = array();
025 private $styleStack;
026
027 /**
028 * Escapes "<" special char in given text.
029 *
030 * @param string $text Text to escape
031 *
032 * @return string Escaped text
033 */
034 public static function escape($text)
035 {
036 $text = preg_replace('/([^\\\\]?)</', '$1\\<', $text);
037
038 if ('\\' === substr($text, -1)) {
039 $len = strlen($text);
040 $text = rtrim($text, '\\');
041 $text .= str_repeat('<<', $len - strlen($text));
042 }
043
044 return $text;
045 }
046
047 /**
048 * Initializes console output formatter.
049 *
050 * @param bool $decorated Whether this formatter should actually decorate strings
051 * @param OutputFormatterStyleInterface[] $styles Array of "name => FormatterStyle" instances
052 */
053 public function __construct($decorated = false, array $styles = array())
054 {
055 $this->decorated = (bool) $decorated;
056
057 $this->setStyle('error', new OutputFormatterStyle('white', 'red'));
058 $this->setStyle('info', new OutputFormatterStyle('green'));
059 $this->setStyle('comment', new OutputFormatterStyle('yellow'));
060 $this->setStyle('question', new OutputFormatterStyle('black', 'cyan'));
061
062 foreach ($styles as $name => $style) {
063 $this->setStyle($name, $style);
064 }
065
066 $this->styleStack = new OutputFormatterStyleStack();
067 }
068
069 /**
070 * Sets the decorated flag.
071 *
072 * @param bool $decorated Whether to decorate the messages or not
073 */
074 public function setDecorated($decorated)
075 {
076 $this->decorated = (bool) $decorated;
077 }
078
079 /**
080 * Gets the decorated flag.
081 *
082 * @return bool true if the output will decorate messages, false otherwise
083 */
084 public function isDecorated()
085 {
086 return $this->decorated;
087 }
088
089 /**
090 * Sets a new style.
091 *
092 * @param string $name The style name
093 * @param OutputFormatterStyleInterface $style The style instance
094 */
095 public function setStyle($name, OutputFormatterStyleInterface $style)
096 {
097 $this->styles[strtolower($name)] = $style;
098 }
099
100 /**
101 * Checks if output formatter has style with specified name.
102 *
103 * @param string $name
104 *
105 * @return bool
106 */
107 public function hasStyle($name)
108 {
109 return isset($this->styles[strtolower($name)]);
110 }
111
112 /**
113 * Gets style options from style with specified name.
114 *
115 * @param string $name
116 *
117 * @return OutputFormatterStyleInterface
118 *
119 * @throws InvalidArgumentException When style isn't defined
120 */
121 public function getStyle($name)
122 {
123 if (!$this->hasStyle($name)) {
124 throw new InvalidArgumentException(sprintf('Undefined style: %s', $name));
125 }
126
127 return $this->styles[strtolower($name)];
128 }
129
130 /**
131 * Formats a message according to the given styles.
132 *
133 * @param string $message The message to style
134 *
135 * @return string The styled message
136 */
137 public function format($message)
138 {
139 $message = (string) $message;
140 $offset = 0;
141 $output = '';
142 $tagRegex = '[a-z][a-z0-9_=;-]*+';
143 preg_match_all("#<(($tagRegex) | /($tagRegex)?)>#ix", $message, $matches, PREG_OFFSET_CAPTURE);
144 foreach ($matches[0] as $i => $match) {
145 $pos = $match[1];
146 $text = $match[0];
147
148 if (0 != $pos && '\\' == $message[$pos - 1]) {
149 continue;
150 }
151
152 // add the text up to the next tag
153 $output .= $this->applyCurrentStyle(substr($message, $offset, $pos - $offset));
154 $offset = $pos + strlen($text);
155
156 // opening tag?
157 if ($open = '/' != $text[1]) {
158 $tag = $matches[1][$i][0];
159 } else {
160 $tag = isset($matches[3][$i][0]) ? $matches[3][$i][0] : '';
161 }
162
163 if (!$open && !$tag) {
164 // </>
165 $this->styleStack->pop();
166 } elseif (false === $style = $this->createStyleFromString(strtolower($tag))) {
167 $output .= $this->applyCurrentStyle($text);
168 } elseif ($open) {
169 $this->styleStack->push($style);
170 } else {
171 $this->styleStack->pop($style);
172 }
173 }
174
175 $output .= $this->applyCurrentStyle(substr($message, $offset));
176
177 if (false !== strpos($output, '<<')) {
178 return strtr($output, array('\\<' => '<', '<<' => '\\'));
179 }
180
181 return str_replace('\\<', '<', $output);
182 }
183
184 /**
185 * @return OutputFormatterStyleStack
186 */
187 public function getStyleStack()
188 {
189 return $this->styleStack;
190 }
191
192 /**
193 * Tries to create new style instance from string.
194 *
195 * @param string $string
196 *
197 * @return OutputFormatterStyle|bool false if string is not format string
198 */
199 private function createStyleFromString($string)
200 {
201 if (isset($this->styles[$string])) {
202 return $this->styles[$string];
203 }
204
205 if (!preg_match_all('/([^=]+)=([^;]+)(;|$)/', strtolower($string), $matches, PREG_SET_ORDER)) {
206 return false;
207 }
208
209 $style = new OutputFormatterStyle();
210 foreach ($matches as $match) {
211 array_shift($match);
212
213 if ('fg' == $match[0]) {
214 $style->setForeground($match[1]);
215 } elseif ('bg' == $match[0]) {
216 $style->setBackground($match[1]);
217 } else {
218 try {
219 $style->setOption($match[1]);
220 } catch (\InvalidArgumentException $e) {
221 return false;
222 }
223 }
224 }
225
226 return $style;
227 }
228
229 /**
230 * Applies current style from stack to text, if must be applied.
231 *
232 * @param string $text Input text
233 *
234 * @return string Styled text
235 */
236 private function applyCurrentStyle($text)
237 {
238 return $this->isDecorated() && strlen($text) > 0 ? $this->styleStack->getCurrent()->apply($text) : $text;
239 }
240 }
241