XOOPS 2.5.6  Final
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Generator.php
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1 <?php
2 
11 {
12 
16  private $_xhtml = true;
17 
21  private $_scriptFix = false;
22 
27  private $_def;
28 
32  private $_sortAttr;
33 
37  private $_flashCompat;
38 
42  private $_innerHTMLFix;
43 
48  private $_flashStack = array();
49 
53  protected $config;
54 
59  public function __construct($config, $context) {
60  $this->config = $config;
61  $this->_scriptFix = $config->get('Output.CommentScriptContents');
62  $this->_innerHTMLFix = $config->get('Output.FixInnerHTML');
63  $this->_sortAttr = $config->get('Output.SortAttr');
64  $this->_flashCompat = $config->get('Output.FlashCompat');
65  $this->_def = $config->getHTMLDefinition();
66  $this->_xhtml = $this->_def->doctype->xml;
67  }
68 
75  public function generateFromTokens($tokens) {
76  if (!$tokens) return '';
77 
78  // Basic algorithm
79  $html = '';
80  for ($i = 0, $size = count($tokens); $i < $size; $i++) {
81  if ($this->_scriptFix && $tokens[$i]->name === 'script'
82  && $i + 2 < $size && $tokens[$i+2] instanceof HTMLPurifier_Token_End) {
83  // script special case
84  // the contents of the script block must be ONE token
85  // for this to work.
86  $html .= $this->generateFromToken($tokens[$i++]);
87  $html .= $this->generateScriptFromToken($tokens[$i++]);
88  }
89  $html .= $this->generateFromToken($tokens[$i]);
90  }
91 
92  // Tidy cleanup
93  if (extension_loaded('tidy') && $this->config->get('Output.TidyFormat')) {
94  $tidy = new Tidy;
95  $tidy->parseString($html, array(
96  'indent'=> true,
97  'output-xhtml' => $this->_xhtml,
98  'show-body-only' => true,
99  'indent-spaces' => 2,
100  'wrap' => 68,
101  ), 'utf8');
102  $tidy->cleanRepair();
103  $html = (string) $tidy; // explicit cast necessary
104  }
105 
106  // Normalize newlines to system defined value
107  if ($this->config->get('Core.NormalizeNewlines')) {
108  $nl = $this->config->get('Output.Newline');
109  if ($nl === null) $nl = PHP_EOL;
110  if ($nl !== "\n") $html = str_replace("\n", $nl, $html);
111  }
112  return $html;
113  }
114 
120  public function generateFromToken($token) {
121  if (!$token instanceof HTMLPurifier_Token) {
122  trigger_error('Cannot generate HTML from non-HTMLPurifier_Token object', E_USER_WARNING);
123  return '';
124 
125  } elseif ($token instanceof HTMLPurifier_Token_Start) {
126  $attr = $this->generateAttributes($token->attr, $token->name);
127  if ($this->_flashCompat) {
128  if ($token->name == "object") {
129  $flash = new stdclass();
130  $flash->attr = $token->attr;
131  $flash->param = array();
132  $this->_flashStack[] = $flash;
133  }
134  }
135  return '<' . $token->name . ($attr ? ' ' : '') . $attr . '>';
136 
137  } elseif ($token instanceof HTMLPurifier_Token_End) {
138  $_extra = '';
139  if ($this->_flashCompat) {
140  if ($token->name == "object" && !empty($this->_flashStack)) {
141  // doesn't do anything for now
142  }
143  }
144  return $_extra . '</' . $token->name . '>';
145 
146  } elseif ($token instanceof HTMLPurifier_Token_Empty) {
147  if ($this->_flashCompat && $token->name == "param" && !empty($this->_flashStack)) {
148  $this->_flashStack[count($this->_flashStack)-1]->param[$token->attr['name']] = $token->attr['value'];
149  }
150  $attr = $this->generateAttributes($token->attr, $token->name);
151  return '<' . $token->name . ($attr ? ' ' : '') . $attr .
152  ( $this->_xhtml ? ' /': '' ) // <br /> v. <br>
153  . '>';
154 
155  } elseif ($token instanceof HTMLPurifier_Token_Text) {
156  return $this->escape($token->data, ENT_NOQUOTES);
157 
158  } elseif ($token instanceof HTMLPurifier_Token_Comment) {
159  return '<!--' . $token->data . '-->';
160  } else {
161  return '';
162 
163  }
164  }
165 
171  public function generateScriptFromToken($token) {
172  if (!$token instanceof HTMLPurifier_Token_Text) return $this->generateFromToken($token);
173  // Thanks <http://lachy.id.au/log/2005/05/script-comments>
174  $data = preg_replace('#//\s*$#', '', $token->data);
175  return '<!--//--><![CDATA[//><!--' . "\n" . trim($data) . "\n" . '//--><!]]>';
176  }
177 
186  public function generateAttributes($assoc_array_of_attributes, $element = false) {
187  $html = '';
188  if ($this->_sortAttr) ksort($assoc_array_of_attributes);
189  foreach ($assoc_array_of_attributes as $key => $value) {
190  if (!$this->_xhtml) {
191  // Remove namespaced attributes
192  if (strpos($key, ':') !== false) continue;
193  // Check if we should minimize the attribute: val="val" -> val
194  if ($element && !empty($this->_def->info[$element]->attr[$key]->minimized)) {
195  $html .= $key . ' ';
196  continue;
197  }
198  }
199  // Workaround for Internet Explorer innerHTML bug.
200  // Essentially, Internet Explorer, when calculating
201  // innerHTML, omits quotes if there are no instances of
202  // angled brackets, quotes or spaces. However, when parsing
203  // HTML (for example, when you assign to innerHTML), it
204  // treats backticks as quotes. Thus,
205  // <img alt="``" />
206  // becomes
207  // <img alt=`` />
208  // becomes
209  // <img alt='' />
210  // Fortunately, all we need to do is trigger an appropriate
211  // quoting style, which we do by adding an extra space.
212  // This also is consistent with the W3C spec, which states
213  // that user agents may ignore leading or trailing
214  // whitespace (in fact, most don't, at least for attributes
215  // like alt, but an extra space at the end is barely
216  // noticeable). Still, we have a configuration knob for
217  // this, since this transformation is not necesary if you
218  // don't process user input with innerHTML or you don't plan
219  // on supporting Internet Explorer.
220  if ($this->_innerHTMLFix) {
221  if (strpos($value, '`') !== false) {
222  // check if correct quoting style would not already be
223  // triggered
224  if (strcspn($value, '"\' <>') === strlen($value)) {
225  // protect!
226  $value .= ' ';
227  }
228  }
229  }
230  $html .= $key.'="'.$this->escape($value).'" ';
231  }
232  return rtrim($html);
233  }
234 
245  public function escape($string, $quote = null) {
246  // Workaround for APC bug on Mac Leopard reported by sidepodcast
247  // http://htmlpurifier.org/phorum/read.php?3,4823,4846
248  if ($quote === null) $quote = ENT_COMPAT;
249  return htmlspecialchars($string, $quote, 'UTF-8');
250  }
251 
252 }
253 
254 // vim: et sw=4 sts=4