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  1: <?php
  2: 
  3: /**
  4:  * This file is part of the Tracy (https://tracy.nette.org)
  5:  * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
  6:  */
  7: 
  8: namespace Tracy;
  9: 
 10: 
 11: /**
 12:  * Red BlueScreen.
 13:  */
 14: class BlueScreen
 15: {
 16:     /** @var string[] */
 17:     public $info = [];
 18: 
 19:     /** @var callable[] */
 20:     private $panels = [];
 21: 
 22:     /** @var string[] paths to be collapsed in stack trace (e.g. core libraries) */
 23:     public $collapsePaths = [];
 24: 
 25:     /** @var int  */
 26:     public $maxDepth = 3;
 27: 
 28:     /** @var int  */
 29:     public $maxLength = 150;
 30: 
 31: 
 32:     public function __construct()
 33:     {
 34:         $this->collapsePaths[] = preg_match('#(.+/vendor)/tracy/tracy/src/Tracy$#', strtr(__DIR__, '\\', '/'), $m)
 35:             ? $m[1]
 36:             : __DIR__;
 37:     }
 38: 
 39: 
 40:     /**
 41:      * Add custom panel.
 42:      * @param  callable
 43:      * @return self
 44:      */
 45:     public function addPanel($panel)
 46:     {
 47:         if (!in_array($panel, $this->panels, TRUE)) {
 48:             $this->panels[] = $panel;
 49:         }
 50:         return $this;
 51:     }
 52: 
 53: 
 54:     /**
 55:      * Renders blue screen.
 56:      * @param  \Exception|\Throwable
 57:      * @return void
 58:      */
 59:     public function render($exception)
 60:     {
 61:         if (Helpers::isAjax() && session_status() === PHP_SESSION_ACTIVE) {
 62:             ob_start(function () {});
 63:             $this->renderTemplate($exception, __DIR__ . '/assets/BlueScreen/content.phtml');
 64:             $contentId = $_SERVER['HTTP_X_TRACY_AJAX'];
 65:             $queue = & $_SESSION['_tracy']['bluescreen'];
 66:             $queue = array_slice(array_filter((array) $queue), -5, NULL, TRUE);
 67:             $queue[$contentId] = ['content' => ob_get_clean(), 'dumps' => Dumper::fetchLiveData()];
 68: 
 69:         } else {
 70:             $this->renderTemplate($exception, __DIR__ . '/assets/BlueScreen/page.phtml');
 71:         }
 72:     }
 73: 
 74: 
 75:     /**
 76:      * Renders blue screen to file (if file exists, it will not be overwritten).
 77:      * @param  \Exception|\Throwable
 78:      * @param  string file path
 79:      * @return void
 80:      */
 81:     public function renderToFile($exception, $file)
 82:     {
 83:         if ($handle = @fopen($file, 'x')) {
 84:             ob_start(); // double buffer prevents sending HTTP headers in some PHP
 85:             ob_start(function ($buffer) use ($handle) { fwrite($handle, $buffer); }, 4096);
 86:             $this->renderTemplate($exception, __DIR__ . '/assets/BlueScreen/page.phtml');
 87:             ob_end_flush();
 88:             ob_end_clean();
 89:             fclose($handle);
 90:         }
 91:     }
 92: 
 93: 
 94:     private function renderTemplate($exception, $template)
 95:     {
 96:         $info = array_filter($this->info);
 97:         $source = Helpers::getSource();
 98:         $sourceIsUrl = preg_match('#^https?://#', $source);
 99:         $title = $exception instanceof \ErrorException
100:             ? Helpers::errorTypeToString($exception->getSeverity())
101:             : Helpers::getClass($exception);
102:         $skipError = $sourceIsUrl && $exception instanceof \ErrorException && !empty($exception->skippable)
103:             ? $source . (strpos($source, '?') ? '&' : '?') . '_tracy_skip_error'
104:             : NULL;
105:         $lastError = $exception instanceof \ErrorException || $exception instanceof \Error ? NULL : error_get_last();
106:         $dump = function($v) {
107:             return Dumper::toHtml($v, [
108:                 Dumper::DEPTH => $this->maxDepth,
109:                 Dumper::TRUNCATE => $this->maxLength,
110:                 Dumper::LIVE => TRUE,
111:                 Dumper::LOCATION => Dumper::LOCATION_CLASS,
112:             ]);
113:         };
114: 
115:         require $template;
116:     }
117: 
118: 
119:     /**
120:      * @return \stdClass[]
121:      */
122:     private function renderPanels($ex)
123:     {
124:         $obLevel = ob_get_level();
125:         $res = [];
126:         foreach ($this->panels as $callback) {
127:             try {
128:                 $panel = call_user_func($callback, $ex);
129:                 if (empty($panel['tab']) || empty($panel['panel'])) {
130:                     continue;
131:                 }
132:                 $res[] = (object) $panel;
133:                 continue;
134:             } catch (\Throwable $e) {
135:             } catch (\Exception $e) {
136:             }
137:             while (ob_get_level() > $obLevel) { // restore ob-level if broken
138:                 ob_end_clean();
139:             }
140:             is_callable($callback, TRUE, $name);
141:             $res[] = (object) [
142:                 'tab' => "Error in panel $name",
143:                 'panel' => nl2br(Helpers::escapeHtml($e)),
144:             ];
145:         }
146:         return $res;
147:     }
148: 
149: 
150:     /**
151:      * Returns syntax highlighted source code.
152:      * @param  string
153:      * @param  int
154:      * @param  int
155:      * @return string|NULL
156:      */
157:     public static function highlightFile($file, $line, $lines = 15, array $vars = NULL)
158:     {
159:         $source = @file_get_contents($file); // @ file may not exist
160:         if ($source) {
161:             $source = static::highlightPhp($source, $line, $lines, $vars);
162:             if ($editor = Helpers::editorUri($file, $line)) {
163:                 $source = substr_replace($source, ' data-tracy-href="' . Helpers::escapeHtml($editor) . '"', 4, 0);
164:             }
165:             return $source;
166:         }
167:     }
168: 
169: 
170:     /**
171:      * Returns syntax highlighted source code.
172:      * @param  string
173:      * @param  int
174:      * @param  int
175:      * @return string
176:      */
177:     public static function highlightPhp($source, $line, $lines = 15, array $vars = NULL)
178:     {
179:         if (function_exists('ini_set')) {
180:             ini_set('highlight.comment', '#998; font-style: italic');
181:             ini_set('highlight.default', '#000');
182:             ini_set('highlight.html', '#06B');
183:             ini_set('highlight.keyword', '#D24; font-weight: bold');
184:             ini_set('highlight.string', '#080');
185:         }
186: 
187:         $source = str_replace(["\r\n", "\r"], "\n", $source);
188:         $source = explode("\n", highlight_string($source, TRUE));
189:         $out = $source[0]; // <code><span color=highlight.html>
190:         $source = str_replace('<br />', "\n", $source[1]);
191:         $out .= static::highlightLine($source, $line, $lines);
192: 
193:         if ($vars) {
194:             $out = preg_replace_callback('#">\$(\w+)(&nbsp;)?</span>#', function ($m) use ($vars) {
195:                 return array_key_exists($m[1], $vars)
196:                     ? '" title="'
197:                         . str_replace('"', '&quot;', trim(strip_tags(Dumper::toHtml($vars[$m[1]], [Dumper::DEPTH => 1]))))
198:                         . $m[0]
199:                     : $m[0];
200:             }, $out);
201:         }
202: 
203:         $out = str_replace('&nbsp;', ' ', $out);
204:         return "<pre class='code'><div>$out</div></pre>";
205:     }
206: 
207: 
208: 
209:     /**
210:      * Returns highlighted line in HTML code.
211:      * @return string
212:      */
213:     public static function highlightLine($html, $line, $lines = 15)
214:     {
215:         $source = explode("\n", "\n" . str_replace("\r\n", "\n", $html));
216:         $out = '';
217:         $spans = 1;
218:         $start = $i = max(1, min($line, count($source) - 1) - floor($lines * 2 / 3));
219:         while (--$i >= 1) { // find last highlighted block
220:             if (preg_match('#.*(</?span[^>]*>)#', $source[$i], $m)) {
221:                 if ($m[1] !== '</span>') {
222:                     $spans++;
223:                     $out .= $m[1];
224:                 }
225:                 break;
226:             }
227:         }
228: 
229:         $source = array_slice($source, $start, $lines, TRUE);
230:         end($source);
231:         $numWidth = strlen((string) key($source));
232: 
233:         foreach ($source as $n => $s) {
234:             $spans += substr_count($s, '<span') - substr_count($s, '</span');
235:             $s = str_replace(["\r", "\n"], ['', ''], $s);
236:             preg_match_all('#<[^>]+>#', $s, $tags);
237:             if ($n == $line) {
238:                 $out .= sprintf(
239:                     "<span class='highlight'>%{$numWidth}s:    %s\n</span>%s",
240:                     $n,
241:                     strip_tags($s),
242:                     implode('', $tags[0])
243:                 );
244:             } else {
245:                 $out .= sprintf("<span class='line'>%{$numWidth}s:</span>    %s\n", $n, $s);
246:             }
247:         }
248:         $out .= str_repeat('</span>', $spans) . '</code>';
249:         return $out;
250:     }
251: 
252: 
253:     /**
254:      * Should a file be collapsed in stack trace?
255:      * @param  string
256:      * @return bool
257:      */
258:     public function isCollapsed($file)
259:     {
260:         $file = strtr($file, '\\', '/') . '/';
261:         foreach ($this->collapsePaths as $path) {
262:             $path = strtr($path, '\\', '/') . '/';
263:             if (strncmp($file, $path, strlen($path)) === 0) {
264:                 return TRUE;
265:             }
266:         }
267:         return FALSE;
268:     }
269: 
270: }
271: 
Nette 2.4-20160930 API API documentation generated by ApiGen 2.8.0