| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * |
| 5 | * Parse for block-quoted text. |
| 6 | * |
| 7 | * @category Text |
| 8 | * |
| 9 | * @package Text_Wiki |
| 10 | * |
| 11 | * @author Paul M. Jones <pmjones@php.net> |
| 12 | * |
| 13 | * @license LGPL |
| 14 | * |
| 15 | * @version $Id: Blockquote.php,v 1.3 2005/02/23 17:38:29 pmjones Exp $ |
| 16 | * |
| 17 | */ |
| 18 | |
| 19 | /** |
| 20 | * |
| 21 | * Parse for block-quoted text. |
| 22 | * |
| 23 | * Find source text marked as a blockquote, identified by any number of |
| 24 | * greater-than signs '>' at the start of the line, followed by a space, |
| 25 | * and then the quote text; each '>' indicates an additional level of |
| 26 | * quoting. |
| 27 | * |
| 28 | * @category Text |
| 29 | * |
| 30 | * @package Text_Wiki |
| 31 | * |
| 32 | * @author Paul M. Jones <pmjones@php.net> |
| 33 | * |
| 34 | */ |
| 35 | |
| 36 | class Text_Wiki_Parse_Blockquote extends Text_Wiki_Parse { |
| 37 | |
| 38 | |
| 39 | /** |
| 40 | * |
| 41 | * Regex for parsing the source text. |
| 42 | * |
| 43 | * @access public |
| 44 | * |
| 45 | * @var string |
| 46 | * |
| 47 | * @see parse() |
| 48 | * |
| 49 | */ |
| 50 | |
| 51 | var $regex = '/\n((\>).*\n)(?!(\>))/Us'; |
| 52 | |
| 53 | |
| 54 | /** |
| 55 | * |
| 56 | * Generates a replacement for the matched text. |
| 57 | * |
| 58 | * Token options are: |
| 59 | * |
| 60 | * 'type' => |
| 61 | * 'start' : the start of a blockquote |
| 62 | * 'end' : the end of a blockquote |
| 63 | * |
| 64 | * 'level' => the indent level (0 for the first level, 1 for the |
| 65 | * second, etc) |
| 66 | * |
| 67 | * @access public |
| 68 | * |
| 69 | * @param array &$matches The array of matches from parse(). |
| 70 | * |
| 71 | * @return A series of text and delimited tokens marking the different |
| 72 | * list text and list elements. |
| 73 | * |
| 74 | */ |
| 75 | |
| 76 | function process(&$matches) |
| 77 | { |
| 78 | // the replacement text we will return to parse() |
| 79 | $return = ''; |
| 80 | |
| 81 | // the list of post-processing matches |
| 82 | $list = array(); |
| 83 | |
| 84 | // $matches[1] is the text matched as a list set by parse(); |
| 85 | // create an array called $list that contains a new set of |
| 86 | // matches for the various list-item elements. |
| 87 | preg_match_all( |
| 88 | '=^(\>+) (.*\n)=Ums', |
| 89 | $matches[1], |
| 90 | $list, |
| 91 | PREG_SET_ORDER |
| 92 | ); |
| 93 | |
| 94 | // a stack of starts and ends; we keep this so that we know what |
| 95 | // indent level we're at. |
| 96 | $stack = array(); |
| 97 | |
| 98 | // loop through each list-item element. |
| 99 | foreach ($list as $key => $val) { |
| 100 | |
| 101 | // $val[0] is the full matched list-item line |
| 102 | // $val[1] is the number of initial '>' chars (indent level) |
| 103 | // $val[2] is the quote text |
| 104 | |
| 105 | // we number levels starting at 1, not zero |
| 106 | $level = strlen($val[1]); |
| 107 | |
| 108 | // get the text of the line |
| 109 | $text = $val[2]; |
| 110 | |
| 111 | // add a level to the list? |
| 112 | while ($level > count($stack)) { |
| 113 | |
| 114 | // the current indent level is greater than the number |
| 115 | // of stack elements, so we must be starting a new |
| 116 | // level. push the new level onto the stack with a |
| 117 | // dummy value (boolean true)... |
| 118 | array_push($stack, true); |
| 119 | |
| 120 | $return .= "\n"; |
| 121 | |
| 122 | // ...and add a start token to the return. |
| 123 | $return .= $this->wiki->addToken( |
| 124 | $this->rule, |
| 125 | array( |
| 126 | 'type' => 'start', |
| 127 | 'level' => $level - 1 |
| 128 | ) |
| 129 | ); |
| 130 | |
| 131 | $return .= "\n\n"; |
| 132 | } |
| 133 | |
| 134 | // remove a level? |
| 135 | while (count($stack) > $level) { |
| 136 | |
| 137 | // as long as the stack count is greater than the |
| 138 | // current indent level, we need to end list types. |
| 139 | // continue adding end-list tokens until the stack count |
| 140 | // and the indent level are the same. |
| 141 | array_pop($stack); |
| 142 | |
| 143 | $return .= "\n\n"; |
| 144 | |
| 145 | $return .= $this->wiki->addToken( |
| 146 | $this->rule, |
| 147 | array ( |
| 148 | 'type' => 'end', |
| 149 | 'level' => count($stack) |
| 150 | ) |
| 151 | ); |
| 152 | |
| 153 | $return .= "\n"; |
| 154 | } |
| 155 | |
| 156 | // add the line text. |
| 157 | $return .= $text; |
| 158 | } |
| 159 | |
| 160 | // the last line may have been indented. go through the stack |
| 161 | // and create end-tokens until the stack is empty. |
| 162 | $return .= "\n"; |
| 163 | |
| 164 | while (count($stack) > 0) { |
| 165 | array_pop($stack); |
| 166 | $return .= $this->wiki->addToken( |
| 167 | $this->rule, |
| 168 | array ( |
| 169 | 'type' => 'end', |
| 170 | 'level' => count($stack) |
| 171 | ) |
| 172 | ); |
| 173 | } |
| 174 | |
| 175 | // we're done! send back the replacement text. |
| 176 | return "\n$return\n\n"; |
| 177 | } |
| 178 | } |
| 179 | ?> |