360kdw /plugins/vjCommentPlugin/lib/tools/htmlpurifier/library/HTMLPurifier/Injector.php

Language PHP Lines 240
MD5 Hash 9f1d4fac7ab8e8ba0a94a13cdfb5c644 Estimated Cost $2,206 (why?)
Repository https://bitbucket.org/Kudlaty/360kdw.git View Raw File View Project SPDX
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
<?php

/**
 * Injects tokens into the document while parsing for well-formedness.
 * This enables "formatter-like" functionality such as auto-paragraphing,
 * smiley-ification and linkification to take place.
 *
 * A note on how handlers create changes; this is done by assigning a new
 * value to the $token reference. These values can take a variety of forms and
 * are best described HTMLPurifier_Strategy_MakeWellFormed->processToken()
 * documentation.
 *
 * @todo Allow injectors to request a re-run on their output. This
 *       would help if an operation is recursive.
 */
abstract class HTMLPurifier_Injector
{

    /**
     * Advisory name of injector, this is for friendly error messages
     */
    public $name;

    /**
     * Instance of HTMLPurifier_HTMLDefinition
     */
    protected $htmlDefinition;

    /**
     * Reference to CurrentNesting variable in Context. This is an array
     * list of tokens that we are currently "inside"
     */
    protected $currentNesting;

    /**
     * Reference to InputTokens variable in Context. This is an array
     * list of the input tokens that are being processed.
     */
    protected $inputTokens;

    /**
     * Reference to InputIndex variable in Context. This is an integer
     * array index for $this->inputTokens that indicates what token
     * is currently being processed.
     */
    protected $inputIndex;

    /**
     * Array of elements and attributes this injector creates and therefore
     * need to be allowed by the definition. Takes form of
     * array('element' => array('attr', 'attr2'), 'element2')
     */
    public $needed = array();

    /**
     * Index of inputTokens to rewind to.
     */
    protected $rewind = false;

    /**
     * Rewind to a spot to re-perform processing. This is useful if you
     * deleted a node, and now need to see if this change affected any
     * earlier nodes. Rewinding does not affect other injectors, and can
     * result in infinite loops if not used carefully.
     * @warning HTML Purifier will prevent you from fast-forwarding with this
     *          function.
     */
    public function rewind($index) {
        $this->rewind = $index;
    }

    /**
     * Retrieves rewind, and then unsets it.
     */
    public function getRewind() {
        $r = $this->rewind;
        $this->rewind = false;
        return $r;
    }

    /**
     * Prepares the injector by giving it the config and context objects:
     * this allows references to important variables to be made within
     * the injector. This function also checks if the HTML environment
     * will work with the Injector (see checkNeeded()).
     * @param $config Instance of HTMLPurifier_Config
     * @param $context Instance of HTMLPurifier_Context
     * @return Boolean false if success, string of missing needed element/attribute if failure
     */
    public function prepare($config, $context) {
        $this->htmlDefinition = $config->getHTMLDefinition();
        // Even though this might fail, some unit tests ignore this and
        // still test checkNeeded, so be careful. Maybe get rid of that
        // dependency.
        $result = $this->checkNeeded($config);
        if ($result !== false) return $result;
        $this->currentNesting =& $context->get('CurrentNesting');
        $this->inputTokens    =& $context->get('InputTokens');
        $this->inputIndex     =& $context->get('InputIndex');
        return false;
    }

    /**
     * This function checks if the HTML environment
     * will work with the Injector: if p tags are not allowed, the
     * Auto-Paragraphing injector should not be enabled.
     * @param $config Instance of HTMLPurifier_Config
     * @param $context Instance of HTMLPurifier_Context
     * @return Boolean false if success, string of missing needed element/attribute if failure
     */
    public function checkNeeded($config) {
        $def = $config->getHTMLDefinition();
        foreach ($this->needed as $element => $attributes) {
            if (is_int($element)) $element = $attributes;
            if (!isset($def->info[$element])) return $element;
            if (!is_array($attributes)) continue;
            foreach ($attributes as $name) {
                if (!isset($def->info[$element]->attr[$name])) return "$element.$name";
            }
        }
        return false;
    }

    /**
     * Tests if the context node allows a certain element
     * @param $name Name of element to test for
     * @return True if element is allowed, false if it is not
     */
    public function allowsElement($name) {
        if (!empty($this->currentNesting)) {
            $parent_token = array_pop($this->currentNesting);
            $this->currentNesting[] = $parent_token;
            $parent = $this->htmlDefinition->info[$parent_token->name];
        } else {
            $parent = $this->htmlDefinition->info_parent_def;
        }
        if (!isset($parent->child->elements[$name]) || isset($parent->excludes[$name])) {
            return false;
        }
        // check for exclusion
        for ($i = count($this->currentNesting) - 2; $i >= 0; $i--) {
            $node = $this->currentNesting[$i];
            $def  = $this->htmlDefinition->info[$node->name];
            if (isset($def->excludes[$name])) return false;
        }
        return true;
    }

    /**
     * Iterator function, which starts with the next token and continues until
     * you reach the end of the input tokens.
     * @warning Please prevent previous references from interfering with this
     *          functions by setting $i = null beforehand!
     * @param &$i Current integer index variable for inputTokens
     * @param &$current Current token variable. Do NOT use $token, as that variable is also a reference
     */
    protected function forward(&$i, &$current) {
        if ($i === null) $i = $this->inputIndex + 1;
        else $i++;
        if (!isset($this->inputTokens[$i])) return false;
        $current = $this->inputTokens[$i];
        return true;
    }

    /**
     * Similar to _forward, but accepts a third parameter $nesting (which
     * should be initialized at 0) and stops when we hit the end tag
     * for the node $this->inputIndex starts in.
     */
    protected function forwardUntilEndToken(&$i, &$current, &$nesting) {
        $result = $this->forward($i, $current);
        if (!$result) return false;
        if ($nesting === null) $nesting = 0;
        if     ($current instanceof HTMLPurifier_Token_Start) $nesting++;
        elseif ($current instanceof HTMLPurifier_Token_End) {
            if ($nesting <= 0) return false;
            $nesting--;
        }
        return true;
    }

    /**
     * Iterator function, starts with the previous token and continues until
     * you reach the beginning of input tokens.
     * @warning Please prevent previous references from interfering with this
     *          functions by setting $i = null beforehand!
     * @param &$i Current integer index variable for inputTokens
     * @param &$current Current token variable. Do NOT use $token, as that variable is also a reference
     */
    protected function backward(&$i, &$current) {
        if ($i === null) $i = $this->inputIndex - 1;
        else $i--;
        if ($i < 0) return false;
        $current = $this->inputTokens[$i];
        return true;
    }

    /**
     * Initializes the iterator at the current position. Use in a do {} while;
     * loop to force the _forward and _backward functions to start at the
     * current location.
     * @warning Please prevent previous references from interfering with this
     *          functions by setting $i = null beforehand!
     * @param &$i Current integer index variable for inputTokens
     * @param &$current Current token variable. Do NOT use $token, as that variable is also a reference
     */
    protected function current(&$i, &$current) {
        if ($i === null) $i = $this->inputIndex;
        $current = $this->inputTokens[$i];
    }

    /**
     * Handler that is called when a text token is processed
     */
    public function handleText(&$token) {}

    /**
     * Handler that is called when a start or empty token is processed
     */
    public function handleElement(&$token) {}

    /**
     * Handler that is called when an end token is processed
     */
    public function handleEnd(&$token) {
        $this->notifyEnd($token);
    }

    /**
     * Notifier that is called when an end token is processed
     * @note This differs from handlers in that the token is read-only
     * @deprecated
     */
    public function notifyEnd($token) {}


}

// vim: et sw=4 sts=4
Back to Top