| 1 | <?php
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| 2 | /**
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| 3 | * HTML2PDF Librairy - parsingHtml class
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| 4 | *
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| 5 | * HTML => PDF convertor
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| 6 | * distributed under the LGPL License
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| 7 | *
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| 8 | * @author Laurent MINGUET <webmaster@html2pdf.fr>
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| 9 | * @version 4.03
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| 10 | */
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| 11 |
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| 12 | class HTML2PDF_parsingHtml
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| 13 | {
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| 14 | protected $_html = ''; // HTML code to parse
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| 15 | protected $_num = 0; // table number
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| 16 | protected $_level = 0; // table level
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| 17 | protected $_encoding = ''; // encoding
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| 18 | public $code = array(); // parsed HTML codfe
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| 19 |
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| 20 | const HTML_TAB = ' ';
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| 21 |
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| 22 | /**
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| 23 | * main constructor
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| 24 | *
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| 25 | * @param string encoding
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| 26 | * @access public
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| 27 | */
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| 28 | public function __construct($encoding = 'UTF-8')
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| 29 | {
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| 30 | $this->_num = 0;
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| 31 | $this->_level = array($this->_num);
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| 32 | $this->_html = '';
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| 33 | $this->code = array();
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| 34 | $this->setEncoding($encoding);
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| 35 | }
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| 36 |
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| 37 | /**
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| 38 | * change the encoding
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| 39 | *
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| 40 | * @param string encoding
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| 41 | * @access public
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| 42 | */
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| 43 | public function setEncoding($encoding)
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| 44 | {
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| 45 | $this->_encoding = $encoding;
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| 46 | }
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| 47 |
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| 48 | /**
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| 49 | * Define the HTML code to parse
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| 50 | *
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| 51 | * @param string HTML code
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| 52 | * @access public
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| 53 | */
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| 54 | public function setHTML($html)
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| 55 | {
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| 56 | // remove the HTML in comment
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| 57 | $html = preg_replace('/<!--(.*)-->/isU', '', $html);
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| 58 |
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| 59 | // save the HTML code
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| 60 | $this->_html = $html;
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| 61 | }
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| 62 |
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| 63 | /**
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| 64 | * parse the HTML code
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| 65 | *
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| 66 | * @access public
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| 67 | */
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| 68 | public function parse()
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| 69 | {
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| 70 | $parents = array();
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| 71 |
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| 72 | // flag : are we in a <pre> Tag ?
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| 73 | $tagPreIn = false;
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| 74 |
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| 75 | // action to use for each line of the content of a <pre> Tag
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| 76 | $tagPreBr = array(
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| 77 | 'name' => 'br',
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| 78 | 'close' => false,
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| 79 | 'param' => array(
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| 80 | 'style' => array(),
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| 81 | 'num' => 0
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| 82 | )
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| 83 | );
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| 84 |
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| 85 | // tag that can be not closed
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| 86 | $tagsNotClosed = array(
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| 87 | 'br', 'hr', 'img', 'col',
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| 88 | 'input', 'link', 'option',
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| 89 | 'circle', 'ellipse', 'path', 'rect', 'line', 'polygon', 'polyline'
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| 90 | );
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| 91 |
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| 92 | // search the HTML tags
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| 93 | $tmp = array();
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| 94 | $this->_searchCode($tmp);
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| 95 |
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| 96 | // all the actions to do
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| 97 | $actions = array();
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| 98 |
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| 99 | // foreach part of the HTML code
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| 100 | foreach ($tmp as $part) {
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| 101 | // if it is a tag code
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| 102 | if ($part[0]=='code') {
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| 103 | // analise the HTML code
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| 104 | $res = $this->_analiseCode($part[1]);
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| 105 |
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| 106 | // if it is a real HTML tag
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| 107 | if ($res) {
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| 108 | // save the current posistion in the HTML code
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| 109 | $res['html_pos'] = $part[2];
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| 110 |
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| 111 | // if the tag must be closed
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| 112 | if (!in_array($res['name'], $tagsNotClosed)) {
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| 113 | // if it is a closure tag
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| 114 | if ($res['close']) {
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| 115 | // HTML validation
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| 116 | if (count($parents)<1)
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| 117 | throw new HTML2PDF_exception(3, $res['name'], $this->getHtmlErrorCode($res['html_pos']));
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| 118 | else if ($parents[count($parents)-1]!=$res['name'])
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| 119 | throw new HTML2PDF_exception(4, $parents, $this->getHtmlErrorCode($res['html_pos']));
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| 120 | else
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| 121 | unset($parents[count($parents)-1]);
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| 122 | } else {
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| 123 | // if it is a autoclosed tag
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| 124 | if ($res['autoclose']) {
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| 125 | // save the opened tag
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| 126 | $actions[] = $res;
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| 127 |
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| 128 | // prepare the closed tag
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| 129 | $res['params'] = array();
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| 130 | $res['close'] = true;
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| 131 | }
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| 132 | // else :add a child for validation
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| 133 | else
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| 134 | $parents[count($parents)] = $res['name'];
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| 135 | }
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| 136 |
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| 137 | // if it is a <pre> tag (or <code> tag) not auclosed => update the flag
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| 138 | if (($res['name']=='pre' || $res['name']=='code') && !$res['autoclose']) {
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| 139 | $tagPreIn = !$res['close'];
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| 140 | }
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| 141 | }
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| 142 |
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| 143 | // save the actions to convert
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| 144 | $actions[] = $res;
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| 145 | } else { // else (it is not a real HTML tag => we transform it in Texte
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| 146 | $part[0]='txt';
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| 147 | }
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| 148 | }
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| 149 | // if it is text
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| 150 | if ($part[0]=='txt') {
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| 151 | // if we are not in a <pre> tag
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| 152 | if (!$tagPreIn) {
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| 153 | // save the action
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| 154 | $actions[] = array(
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| 155 | 'name' => 'write',
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| 156 | 'close' => false,
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| 157 | 'param' => array('txt' => $this->_prepareTxt($part[1])),
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| 158 | );
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| 159 | } else { // else (if we are in a <pre> tag)
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| 160 | // prepare the text
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| 161 | $part[1] = str_replace("\r", '', $part[1]);
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| 162 | $part[1] = explode("\n", $part[1]);
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| 163 |
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| 164 | // foreach line of the text
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| 165 | foreach ($part[1] as $k => $txt) {
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| 166 | // transform the line
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| 167 | $txt = str_replace("\t", self::HTML_TAB, $txt);
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| 168 | $txt = str_replace(' ', ' ', $txt);
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| 169 |
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| 170 | // add a break line
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| 171 | if ($k>0) $actions[] = $tagPreBr;
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| 172 |
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| 173 | // save the action
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| 174 | $actions[] = array(
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| 175 | 'name' => 'write',
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| 176 | 'close' => false,
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| 177 | 'param' => array('txt' => $this->_prepareTxt($txt, false)),
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| 178 | );
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| 179 | }
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| 180 | }
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| 181 | }
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| 182 | }
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| 183 |
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| 184 | // for each indentified action, we have to clean up the begin and the end of the texte
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| 185 | // based on tags that surround it
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| 186 |
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| 187 | // list of the tags to clean
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| 188 | $tagsToClean = array(
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| 189 | 'page', 'page_header', 'page_footer', 'form',
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| 190 | 'table', 'thead', 'tfoot', 'tr', 'td', 'th', 'br',
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| 191 | 'div', 'hr', 'p', 'ul', 'ol', 'li',
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| 192 | 'h1', 'h2', 'h3', 'h4', 'h5', 'h6',
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| 193 | 'bookmark', 'fieldset', 'legend',
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| 194 | 'draw', 'circle', 'ellipse', 'path', 'rect', 'line', 'g', 'polygon', 'polyline',
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| 195 | 'option'
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| 196 | );
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| 197 |
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| 198 | // foreach action
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| 199 | $nb = count($actions);
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| 200 | for ($k=0; $k<$nb; $k++) {
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| 201 | // if it is a Text
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| 202 | if ($actions[$k]['name']=='write') {
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| 203 | // if the tag before the text is a tag to clean => ltrim on the text
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| 204 | if ($k>0 && in_array($actions[$k-1]['name'], $tagsToClean))
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| 205 | $actions[$k]['param']['txt'] = ltrim($actions[$k]['param']['txt']);
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| 206 |
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| 207 | // if the tag after the text is a tag to clean => rtrim on the text
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| 208 | if ($k<$nb-1 && in_array($actions[$k+1]['name'], $tagsToClean))
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| 209 | $actions[$k]['param']['txt'] = rtrim($actions[$k]['param']['txt']);
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| 210 |
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| 211 | // if the text is empty => remove the action
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| 212 | if (!strlen($actions[$k]['param']['txt']))
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| 213 | unset($actions[$k]);
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| 214 | }
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| 215 | }
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| 216 |
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| 217 | // if we are not on the level 0 => HTML validator ERROR
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| 218 | if (count($parents)) throw new HTML2PDF_exception(5, $parents);
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| 219 |
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| 220 | // save the actions to do
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| 221 | $this->code = array_values($actions);
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| 222 | }
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| 223 |
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| 224 | /**
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| 225 | * prepare the text
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| 226 | *
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| 227 | * @param string texte
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| 228 | * @param boolean true => replace multiple space+\t+\r+\n by a single space
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| 229 | * @return string texte
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| 230 | * @access protected
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| 231 | */
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| 232 | protected function _prepareTxt($txt, $spaces = true)
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| 233 | {
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| 234 | if ($spaces) $txt = preg_replace('/\s+/is', ' ', $txt);
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| 235 | $txt = str_replace('€', 'â¬', $txt);
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| 236 | $txt = html_entity_decode($txt, ENT_QUOTES, $this->_encoding);
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| 237 | return $txt;
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| 238 | }
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| 239 |
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| 240 | /**
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| 241 | * parse the HTML code
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| 242 | *
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| 243 | * @param &array array's result
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| 244 | * @return null
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| 245 | */
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| 246 | protected function _searchCode(&$tmp)
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| 247 | {
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| 248 | // initialise the array
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| 249 | $tmp = array();
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| 250 |
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| 251 | // regexp to separate the tags from the texts
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| 252 | $reg = '/(<[^>]+>)|([^<]+)+/isU';
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| 253 |
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| 254 | // last match found
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| 255 | $str = '';
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| 256 | $offset = 0;
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| 257 |
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| 258 | // As it finds a match
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| 259 | while (preg_match($reg, $this->_html, $parse, PREG_OFFSET_CAPTURE, $offset)) {
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| 260 | // if it is a tag
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| 261 | if ($parse[1][0]) {
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| 262 | // save the previous text if it exists
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| 263 | if ($str!=='') $tmp[] = array('txt', $str);
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| 264 |
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| 265 | // save the tag, with the offset
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| 266 | $tmp[] = array('code', trim($parse[1][0]), $offset);
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| 267 |
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| 268 | // init the current text
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| 269 | $str = '';
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| 270 | } else { // else (if it is a text)
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| 271 | // add the new text to the current text
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| 272 | $str.= $parse[2][0];
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| 273 | }
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| 274 |
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| 275 | // Update offset to the end of the match
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| 276 | $offset = $parse[0][1] + strlen($parse[0][0]);
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| 277 | unset($parse);
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| 278 | }
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| 279 | // if a text is present in the end, we save it
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| 280 | if ($str!='') $tmp[] = array('txt', $str);
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| 281 | unset($str);
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| 282 | }
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| 283 |
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| 284 | /**
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| 285 | * analise a HTML tag
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| 286 | *
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| 287 | * @param string HTML code to analise
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| 288 | * @return array corresponding action
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| 289 | */
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| 290 | protected function _analiseCode($code)
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| 291 | {
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| 292 | // name of the tag, opening, closure, autoclosure
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| 293 | $tag = '<([\/]{0,1})([_a-z0-9]+)([\/>\s]+)';
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| 294 | if (!preg_match('/'.$tag.'/isU', $code, $match)) return null;
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| 295 | $close = ($match[1]=='/' ? true : false);
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| 296 | $autoclose = preg_match('/\/>$/isU', $code);
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| 297 | $name = strtolower($match[2]);
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| 298 |
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| 299 | // required parameters (depends on the tag name)
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| 300 | $param = array();
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| 301 | $param['style'] = '';
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| 302 | if ($name=='img') {
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| 303 | $param['alt'] = '';
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| 304 | $param['src'] = '';
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| 305 | }
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| 306 | if ($name=='a') {
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| 307 | $param['href'] = '';
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| 308 | }
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| 309 |
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| 310 | // read the parameters : nom=valeur
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| 311 | $prop = '([a-zA-Z0-9_]+)=([^"\'\s>]+)';
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| 312 | preg_match_all('/'.$prop.'/is', $code, $match);
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| 313 | for($k=0; $k<count($match[0]); $k++)
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| 314 | $param[trim(strtolower($match[1][$k]))] = trim($match[2][$k]);
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| 315 |
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| 316 | // read the parameters : nom="valeur"
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| 317 | $prop = '([a-zA-Z0-9_]+)=["]([^"]*)["]';
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| 318 | preg_match_all('/'.$prop.'/is', $code, $match);
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| 319 | for($k=0; $k<count($match[0]); $k++)
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| 320 | $param[trim(strtolower($match[1][$k]))] = trim($match[2][$k]);
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| 321 |
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| 322 | // read the parameters : nom='valeur'
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| 323 | $prop = "([a-zA-Z0-9_]+)=[']([^']*)[']";
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| 324 | preg_match_all('/'.$prop.'/is', $code, $match);
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| 325 | for($k=0; $k<count($match[0]); $k++)
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| 326 | $param[trim(strtolower($match[1][$k]))] = trim($match[2][$k]);
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| 327 |
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| 328 | // compliance of each parameter
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| 329 | $color = "#000000";
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| 330 | $border = null;
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| 331 | foreach ($param as $key => $val) {
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| 332 | $key = strtolower($key);
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| 333 | switch($key)
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| 334 | {
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| 335 | case 'width':
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| 336 | unset($param[$key]);
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| 337 | $param['style'] .= 'width: '.$val.'px; ';
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| 338 | break;
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| 339 |
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| 340 | case 'align':
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| 341 | if ($name==='img') {
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| 342 | unset($param[$key]);
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| 343 | $param['style'] .= 'float: '.$val.'; ';
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| 344 | } elseif ($name!=='table') {
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| 345 | unset($param[$key]);
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| 346 | $param['style'] .= 'text-align: '.$val.'; ';
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| 347 | }
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| 348 | break;
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| 349 |
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| 350 | case 'valign':
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| 351 | unset($param[$key]);
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| 352 | $param['style'] .= 'vertical-align: '.$val.'; ';
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| 353 | break;
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| 354 |
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| 355 | case 'height':
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| 356 | unset($param[$key]);
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| 357 | $param['style'] .= 'height: '.$val.'px; ';
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| 358 | break;
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| 359 |
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| 360 | case 'bgcolor':
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| 361 | unset($param[$key]);
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| 362 | $param['style'] .= 'background: '.$val.'; ';
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| 363 | break;
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| 364 |
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| 365 | case 'bordercolor':
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| 366 | unset($param[$key]);
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| 367 | $color = $val;
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| 368 | break;
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| 369 |
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| 370 | case 'border':
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| 371 | unset($param[$key]);
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| 372 | if (preg_match('/^[0-9]+$/isU', $val)) $val = $val.'px';
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| 373 | $border = $val;
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| 374 | break;
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| 375 |
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| 376 | case 'cellpadding':
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| 377 | case 'cellspacing':
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| 378 | if (preg_match('/^([0-9]+)$/isU', $val)) $param[$key] = $val.'px';
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| 379 | break;
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| 380 |
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| 381 | case 'colspan':
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| 382 | case 'rowspan':
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| 383 | $val = preg_replace('/[^0-9]/isU', '', $val);
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| 384 | if (!$val) $val = 1;
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| 385 | $param[$key] = $val;
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| 386 | break;
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| 387 | }
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| 388 | }
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| 389 |
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| 390 | // compliance of the border
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| 391 | if ($border!==null) {
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| 392 | if ($border) $border = 'border: solid '.$border.' '.$color;
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| 393 | else $border = 'border: none';
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| 394 |
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| 395 | $param['style'] .= $border.'; ';
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| 396 | $param['border'] = $border;
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| 397 | }
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| 398 |
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| 399 | // reading styles: decomposition and standardization
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| 400 | $styles = explode(';', $param['style']);
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| 401 | $param['style'] = array();
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| 402 | foreach ($styles as $style) {
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| 403 | $tmp = explode(':', $style);
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| 404 | if (count($tmp)>1) {
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| 405 | $cod = $tmp[0];
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| 406 | unset($tmp[0]);
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| 407 | $tmp = implode(':', $tmp);
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| 408 | $param['style'][trim(strtolower($cod))] = preg_replace('/[\s]+/isU', ' ', trim($tmp));
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| 409 | }
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| 410 | }
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| 411 |
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| 412 | // determining the level of table opening, with an added level
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| 413 | if (in_array($name, array('ul', 'ol', 'table')) && !$close) {
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| 414 | $this->_num++;
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| 415 | $this->_level[count($this->_level)] = $this->_num;
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| 416 | }
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| 417 |
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| 418 | // get the level of the table containing the element
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| 419 | if (!isset($param['num'])) {
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| 420 | $param['num'] = $this->_level[count($this->_level)-1];
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| 421 | }
|
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| 422 |
|
|---|
| 423 | // for closures table: remove a level
|
|---|
| 424 | if (in_array($name, array('ul', 'ol', 'table')) && $close) {
|
|---|
| 425 | unset($this->_level[count($this->_level)-1]);
|
|---|
| 426 | }
|
|---|
| 427 |
|
|---|
| 428 | // prepare the parameters
|
|---|
| 429 | if (isset($param['value'])) $param['value'] = $this->_prepareTxt($param['value']);
|
|---|
| 430 | if (isset($param['alt'])) $param['alt'] = $this->_prepareTxt($param['alt']);
|
|---|
| 431 | if (isset($param['title'])) $param['title'] = $this->_prepareTxt($param['title']);
|
|---|
| 432 | if (isset($param['class'])) $param['class'] = $this->_prepareTxt($param['class']);
|
|---|
| 433 |
|
|---|
| 434 | // return the new action to do
|
|---|
| 435 | return array('name' => $name, 'close' => $close ? 1 : 0, 'autoclose' => $autoclose, 'param' => $param);
|
|---|
| 436 | }
|
|---|
| 437 |
|
|---|
| 438 | /**
|
|---|
| 439 | * get a full level of HTML, between an opening and closing corresponding
|
|---|
| 440 | *
|
|---|
| 441 | * @param integer key
|
|---|
| 442 | * @return array actions
|
|---|
| 443 | */
|
|---|
| 444 | public function getLevel($k)
|
|---|
| 445 | {
|
|---|
| 446 | // if the code does not exist => return empty
|
|---|
| 447 | if (!isset($this->code[$k])) return array();
|
|---|
| 448 |
|
|---|
| 449 | // the tag to detect
|
|---|
| 450 | $detect = $this->code[$k]['name'];
|
|---|
| 451 |
|
|---|
| 452 | // if it is a text => return
|
|---|
| 453 | if ($detect=='write') {
|
|---|
| 454 | return array($this->code[$k]);
|
|---|
| 455 | }
|
|---|
| 456 |
|
|---|
| 457 | //
|
|---|
| 458 | $level = 0; // depth level
|
|---|
| 459 | $end = false; // end of the search
|
|---|
| 460 | $code = array(); // extract code
|
|---|
| 461 |
|
|---|
| 462 | // while it's not ended
|
|---|
| 463 | while (!$end) {
|
|---|
| 464 | // current action
|
|---|
| 465 | $row = $this->code[$k];
|
|---|
| 466 |
|
|---|
| 467 | // if 'write' => we add the text
|
|---|
| 468 | if ($row['name']=='write') {
|
|---|
| 469 | $code[] = $row;
|
|---|
| 470 | } else { // else, it is a html tag
|
|---|
| 471 | $not = false; // flag for not taking into account the current tag
|
|---|
| 472 |
|
|---|
| 473 | // if it is the searched tag
|
|---|
| 474 | if ($row['name']==$detect) {
|
|---|
| 475 | // if we are just at the root level => dont take it
|
|---|
| 476 | if ($level==0) {
|
|---|
| 477 | $not = true;
|
|---|
| 478 | }
|
|---|
| 479 |
|
|---|
| 480 | // update the level
|
|---|
| 481 | $level+= ($row['close'] ? -1 : 1);
|
|---|
| 482 |
|
|---|
| 483 | // if we are now at the root level => it is the end, and dont take it
|
|---|
| 484 | if ($level==0) {
|
|---|
| 485 | $not = true;
|
|---|
| 486 | $end = true;
|
|---|
| 487 | }
|
|---|
| 488 | }
|
|---|
| 489 |
|
|---|
| 490 | // if we can takin into account the current tag => save it
|
|---|
| 491 | if (!$not) {
|
|---|
| 492 | if (isset($row['style']['text-align'])) unset($row['style']['text-align']);
|
|---|
| 493 | $code[] = $row;
|
|---|
| 494 | }
|
|---|
| 495 | }
|
|---|
| 496 |
|
|---|
| 497 | // it continues as long as there has code to analise
|
|---|
| 498 | if (isset($this->code[$k+1]))
|
|---|
| 499 | $k++;
|
|---|
| 500 | else
|
|---|
| 501 | $end = true;
|
|---|
| 502 | }
|
|---|
| 503 |
|
|---|
| 504 | // return the extract
|
|---|
| 505 | return $code;
|
|---|
| 506 | }
|
|---|
| 507 |
|
|---|
| 508 | /**
|
|---|
| 509 | * return a part of the HTML code, for error message
|
|---|
| 510 | *
|
|---|
| 511 | * @param integer position
|
|---|
| 512 | * @param integer take before
|
|---|
| 513 | * @param integer take after
|
|---|
| 514 | * @return string part of the html code
|
|---|
| 515 | */
|
|---|
| 516 | public function getHtmlErrorCode($pos, $before=30, $after=40)
|
|---|
| 517 | {
|
|---|
| 518 | return substr($this->_html, $pos-$before, $before+$after);
|
|---|
| 519 | }
|
|---|
| 520 | }
|
|---|
