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<?php
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// $Header: /cvsroot/html2ps/xhtml.utils.inc.php,v 1.35 2007/03/15 18:37:36 Konstantin Exp $
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function close_tag($tag, $sample_html) {
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return preg_replace("!(<{$tag}(\s[^>]*[^/>])?)>!si","\\1/>",$sample_html);
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};
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function make_attr_value($attr, $html) {
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return preg_replace("#(<[^>]*\s){$attr}(\s|>|/>)#si","\\1{$attr}=\"{$attr}\"\\2",$html);
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};
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function mk_open_tag_regexp($tag) { return "<\s*{$tag}(\s+[^>]*)?>"; };
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function mk_close_tag_regexp($tag) { return "<\s*/\s*{$tag}\s*>"; };
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function process_html($html) {
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$open = mk_open_tag_regexp("html");
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$close = mk_close_tag_regexp("html");
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if (!preg_match("#{$open}#is",$html)) {
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$html = "<html>".$html;
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};
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/**
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* Let's check if there's more than one <html> tags inside the page text
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* If there are, remove everything except the first one and content between the first and second <html>
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*/
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while (preg_match("#{$open}(.*?){$open}#is", $html)) {
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$html = preg_replace("#{$open}(.*?){$open}#is", "<html>\\2", $html);
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};
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if (!preg_match("#{$close}#is", $html)) {
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$html = $html."</html>";
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};
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// PHP 5.2.0 compatilibty issue
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// preg_replace may accidentally return NULL on large files not matching this
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$html = preg_replace("#.*({$open})#is","\\1",$html);
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// PHP 5.2.0 compatilibty issue
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// preg_replace may accidentally return NULL on large files not matching this
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// Cut off all data before and after 'html' tag; unless we'll do it,
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// the XML parser will die violently
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$html = preg_replace("#^.*<html#is","<html",$html);
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$html = preg_replace("#</html\s*>.*$#is","</html>",$html);
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return $html;
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}
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function process_head($html) {
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$open = mk_open_tag_regexp("head");
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$close = mk_close_tag_regexp("head");
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$ohtml = mk_open_tag_regexp("html");
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$chtml = mk_close_tag_regexp("html");
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$obody = mk_open_tag_regexp("body");
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if (!preg_match("#{$open}#is",$html)) {
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$html = preg_replace("#({$ohtml})(.*)({$obody})#is","\\1<head>\\3</head>\\4",$html);
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} elseif (!preg_match("#{$close}#is",$html)) {
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if (preg_match("#{$obody}#is",$html)) {
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$html = preg_replace("#({$obody})#is","</head>\\1",$html);
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} else {
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$html = preg_replace("#({$chtml})#is","</head>\\1",$html);
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};
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};
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return $html;
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}
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function process_body($html) {
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$open = mk_open_tag_regexp("body");
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$close = mk_close_tag_regexp("body");
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$ohtml = mk_open_tag_regexp("html");
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$chtml = mk_close_tag_regexp("html");
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$chead = mk_close_tag_regexp("head");
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if (!preg_match("#{$open}#is",$html)) {
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if (preg_match("#{$chead}#is",$html)) {
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$html = preg_replace("#({$chead})#is","\\1<body>",$html);
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} else {
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$html = preg_replace("#({$ohtml})#is","\\1<body>",$html);
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};
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};
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if (!preg_match("#{$close}#is",$html)) {
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$html = preg_replace("#({$chtml})#is","</body>\\1",$html);
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};
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// Now check is there any data between </head> and <body>.
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$html = preg_replace("#({$chead})(.+)({$open})#is","\\1\\3\\2",$html);
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// Check if there's any data between </body> and </html>
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$html = preg_replace("#({$close})(.+)({$chtml})#is","\\2\\1\\3",$html);
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return $html;
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}
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// Hmmm. May be we'll just write SAX parser on PHP? ;-)
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function fix_tags($html) {
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$result = "";
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$tag_stack = array();
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// these corrections can simplify the regexp used to parse tags
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// remove whitespaces before '/' and between '/' and '>' in autoclosing tags
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$html = preg_replace("#\s*/\s*>#is","/>",$html);
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// remove whitespaces between '<', '/' and first tag letter in closing tags
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$html = preg_replace("#<\s*/\s*#is","</",$html);
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// remove whitespaces between '<' and first tag letter
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$html = preg_replace("#<\s+#is","<",$html);
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while (preg_match("#(.*?)(<([a-z\d]+)[^>]*/>|<([a-z\d]+)[^>]*(?<!/)>|</([a-z\d]+)[^>]*>)#is",$html,$matches)) {
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$result .= $matches[1];
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$html = substr($html, strlen($matches[0]));
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// Closing tag
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if (isset($matches[5])) {
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$tag = $matches[5];
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if ($tag == $tag_stack[0]) {
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// Matched the last opening tag (normal state)
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// Just pop opening tag from the stack
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array_shift($tag_stack);
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$result .= $matches[2];
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} elseif (array_search($tag, $tag_stack)) {
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// We'll never should close 'table' tag such way, so let's check if any 'tables' found on the stack
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$no_critical_tags = !array_search('table',$tag_stack);
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if (!$no_critical_tags) {
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$no_critical_tags = (array_search('table',$tag_stack) >= array_search($tag, $tag_stack));
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};
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if ($no_critical_tags) {
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// Corresponding opening tag exist on the stack (somewhere deep)
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// Note that we can forget about 0 value returned by array_search, becaus it is handled by previous 'if'
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// Insert a set of closing tags for all non-matching tags
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$i = 0;
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while ($tag_stack[$i] != $tag) {
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$result .= "</{$tag_stack[$i]}> ";
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$i++;
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};
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// close current tag
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$result .= "</{$tag_stack[$i]}> ";
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// remove it from the stack
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array_splice($tag_stack, $i, 1);
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// if this tag is not "critical", reopen "run-off" tags
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$no_reopen_tags = array("tr","td","table","marquee","body","html");
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if (array_search($tag, $no_reopen_tags) === false) {
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while ($i > 0) {
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$i--;
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$result .= "<{$tag_stack[$i]}> ";
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};
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} else {
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array_splice($tag_stack, 0, $i);
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};
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};
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} else {
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// No such tag found on the stack, just remove it (do nothing in out case, as we have to explicitly
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// add things to result
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};
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} elseif (isset($matches[4])) {
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// Opening tag
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$tag = $matches[4];
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array_unshift($tag_stack, $tag);
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$result .= $matches[2];
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} else {
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// Autoclosing tag; do nothing specific
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$result .= $matches[2];
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};
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};
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// Close all tags left
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while (count($tag_stack) > 0) {
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$tag = array_shift($tag_stack);
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$result .= "</".$tag.">";
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}
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return $result;
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}
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/**
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* This function adds quotes to attribute values; it attribute values already have quotes, no changes are made
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*/
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function quote_attrs($html) {
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while (preg_match("!(<[^>]*)\s([^=>]+)=([^'\"\r\n >]+)([\r\n >])!si",$html, $matches)) {
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$html = preg_replace("#(<[^>]*)\s([^=>]+)=([^'\"\r\n >]+)([\r\n >])#si","\\1 \\2='\\3'\\4",$html);
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};
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return $html;
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};
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function escape_attr_value_entities($html) {
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$html = str_replace("<","<",$html);
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$html = str_replace(">",">",$html);
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// Replace all character references by their decimal codes
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process_character_references($html);
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$html = escape_amp($html);
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return $html;
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}
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/**
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* Updates attribute values: if there's any unescaped <, > or & symbols inside an attribute value,
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* replaces them with corresponding entity. Also note that & should not be escaped if it is already the part
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* of entity reference
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*
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* @param String $html source HTML code
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* @return String updated HTML code
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*/
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function escape_attrs_entities($html) {
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$result = "";
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// Regular expression may be described as follows:
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// (<[^>]*) - something starting with < (i.e. tag name and, probably, some attribute name/values pairs
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// \s([^\s=>]+)= - space after "something", followed by attribute name (which may contain anything except spaces, = and > signs
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// (['\"])([^\3]*?)\3 - quoted attribute value; (@todo won't work with escaped quotes inside value, by the way).
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while (preg_match("#^(.*)(<[^>]*)\s([^\s=>]+)=(['\"])([^\\4]*?)\\4(.*)$#si", $html, $matches)) {
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$new_value = escape_attr_value_entities($matches[5]);
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$result .= $matches[1].$matches[2]." ".$matches[3]."=".$matches[4].$new_value.$matches[4];
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$html = $matches[6];
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};
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return $result.$html;
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};
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function fix_attrs_spaces(&$html) {
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while (preg_match("#(<[^>]*)\s([^\s=>]+)=\"([^\"]*?)\"([^\s])#si", $html)) {
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$html = preg_replace("#(<[^>]*)\s([^\s=>]+)=\"([^\"]*?)\"([^\s])#si","\\1 \\2=\"\\3\" \\4",$html);
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};
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while (preg_match("#(<[^>]*)\s([^\s=>]+)='([^']*?)'([^\s])#si", $html)) {
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$html = preg_replace("#(<[^>]*)\s([^\s=>]+)='([^']*?)'([^\s])#si","\\1 \\2='\\3' \\4",$html);
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};
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}
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function fix_attrs_tag($tag) {
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if (preg_match("#(<)(.*?)(/\s*>)#is",$tag, $matches)) {
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$prefix = $matches[1];
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$suffix = $matches[3];
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$content = $matches[2];
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} elseif (preg_match("#(<)(.*?)(>)#is",$tag, $matches)) {
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$prefix = $matches[1];
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$suffix = $matches[3];
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$content = $matches[2];
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} else {
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return;
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};
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if (preg_match("#^\s*(\w+)\s*(.*)\s*/\s*\$#is", $content, $matches)) {
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$tagname = $matches[1];
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$raw_attrs = isset($matches[2]) ? $matches[2] : "";
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} elseif (preg_match("#^\s*(\w+)\s*(.*)\$#is", $content, $matches)) {
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$tagname = $matches[1];
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$raw_attrs = isset($matches[2]) ? $matches[2] : "";
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} else {
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// A strange tag occurred; just remove everything
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$tagname = "";
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$raw_attrs = "";
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};
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$attrs = array();
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while (!empty($raw_attrs)) {
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if (preg_match("#^\s*(\w+?)\s*=\s*\"(.*?)\"(.*)$#is",$raw_attrs,$matches)) {
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$attr = strtolower($matches[1]);
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$value = $matches[2];
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if (!isset($attrs[$attr])) {
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$attrs[$attr] = $value;
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};
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$raw_attrs = $matches[3];
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} elseif (preg_match("#^\s*(\w+?)\s*=\s*'(.*?)'(.*)$#is",$raw_attrs,$matches)) {
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$attr = strtolower($matches[1]);
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$value = $matches[2];
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if (!isset($attrs[$attr])) {
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$attrs[$attr] = $value;
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};
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$raw_attrs = $matches[3];
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} elseif (preg_match("#^\s*(\w+?)=(\w+)(.*)$#is",$raw_attrs,$matches)) {
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$attr = strtolower($matches[1]);
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$value = $matches[2];
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if (!isset($attrs[$attr])) {
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$attrs[$attr] = $value;
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};
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$raw_attrs = $matches[3];
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} elseif (preg_match("#^\s*\S+\s+(.*)$#is",$raw_attrs,$matches)) {
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// Just a junk at the beginning; skip till the first space
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$raw_attrs = $matches[1];
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} else {
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$raw_attrs = "";
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};
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};
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$str = "";
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foreach ($attrs as $key => $value) {
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// In theory, if the garbage have been found inside the attrs section, we could get
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// and invalid attribute name here; just ignore them in this case
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if (HTML2PS_XMLUtils::valid_attribute_name($key)) {
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if (strpos($value,'"') !== false) {
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$str .= " ".$key."='".$value."'";
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} else {
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$str .= " ".$key."=\"".$value."\"";
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};
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};
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};
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return $prefix.$tagname.$str.$suffix;
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}
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function fix_attrs($html) {
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$result = "";
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while (preg_match("#^(.*?)(<[^/].*?>)#is",$html,$matches)) {
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$result .= $matches[1].fix_attrs_tag($matches[2]);
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$html = substr($html, strlen($matches[0]));
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};
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return $result.$html;
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}
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function fix_closing_tags($html) {
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return preg_replace("#</\s*(\w+).*?>#","</\\1>",$html);
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}
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328 |
function process_pagebreak_commands(&$html) {
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|
|
329 |
$html = preg_replace("#<\?page-break>|<!--NewPage-->#","<pagebreak/>",$html);
|
|
|
330 |
}
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|
331 |
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|
332 |
function xhtml2xhtml($html) {
|
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|
333 |
process_pagebreak_commands($html);
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|
334 |
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|
|
335 |
// Remove STYLE tags for the same reason and store them in the temporary variable
|
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|
336 |
// later they will be added back to HEAD section
|
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|
337 |
$styles = process_style($html);
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|
338 |
|
|
|
339 |
// Do HTML -> XML (XHTML) conversion
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|
340 |
// Convert HTML character references to their Unicode analogues
|
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|
341 |
process_character_references($html);
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|
342 |
|
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|
343 |
remove_comments($html);
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|
344 |
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|
345 |
// Convert all tags to lower case
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|
346 |
$html = lowercase_tags($html);
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|
347 |
$html = lowercase_closing_tags($html);
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|
348 |
|
|
|
349 |
// Remove SCRIPT tags
|
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|
350 |
$html = process_script($html);
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|
351 |
|
|
|
352 |
$html = insert_styles($html, $styles);
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|
353 |
|
|
|
354 |
return $html;
|
|
|
355 |
}
|
|
|
356 |
|
|
|
357 |
function html2xhtml($html) {
|
|
|
358 |
process_pagebreak_commands($html);
|
|
|
359 |
|
|
|
360 |
// Remove SCRIPT tags from the page being processed, as script content may
|
|
|
361 |
// mess the firther html-parsing utilities
|
|
|
362 |
$html = process_script($html);
|
|
|
363 |
|
|
|
364 |
// Remove STYLE tags for the same reason and store them in the temporary variable
|
|
|
365 |
// later they will be added back to HEAD section
|
|
|
366 |
$styles = process_style($html);
|
|
|
367 |
|
|
|
368 |
// Convert HTML character references to their Unicode analogues
|
|
|
369 |
process_character_references($html);
|
|
|
370 |
|
|
|
371 |
remove_comments($html);
|
|
|
372 |
|
|
|
373 |
fix_attrs_spaces($html);
|
|
|
374 |
$html = quote_attrs($html);
|
|
|
375 |
$html = escape_attrs_entities($html);
|
|
|
376 |
|
|
|
377 |
$html = lowercase_tags($html);
|
|
|
378 |
$html = lowercase_closing_tags($html);
|
|
|
379 |
|
|
|
380 |
$html = fix_closing_tags($html);
|
|
|
381 |
|
|
|
382 |
$html = close_tag("area",$html);
|
|
|
383 |
$html = close_tag("base",$html);
|
|
|
384 |
$html = close_tag("basefont",$html);
|
|
|
385 |
$html = close_tag("br",$html);
|
|
|
386 |
$html = close_tag("col",$html);
|
|
|
387 |
$html = close_tag("embed",$html);
|
|
|
388 |
$html = close_tag("frame",$html);
|
|
|
389 |
$html = close_tag("hr",$html);
|
|
|
390 |
$html = close_tag("img",$html);
|
|
|
391 |
$html = close_tag("input",$html);
|
|
|
392 |
$html = close_tag("isindex",$html);
|
|
|
393 |
$html = close_tag("link",$html);
|
|
|
394 |
$html = close_tag("meta",$html);
|
|
|
395 |
$html = close_tag("param",$html);
|
|
|
396 |
|
|
|
397 |
$html = make_attr_value("checked",$html);
|
|
|
398 |
$html = make_attr_value("compact",$html);
|
|
|
399 |
$html = make_attr_value("declare",$html);
|
|
|
400 |
$html = make_attr_value("defer",$html);
|
|
|
401 |
$html = make_attr_value("disabled",$html);
|
|
|
402 |
$html = make_attr_value("ismap",$html);
|
|
|
403 |
$html = make_attr_value("multiple",$html);
|
|
|
404 |
$html = make_attr_value("nohref",$html);
|
|
|
405 |
$html = make_attr_value("noresize",$html);
|
|
|
406 |
$html = make_attr_value("noshade",$html);
|
|
|
407 |
$html = make_attr_value("nowrap",$html);
|
|
|
408 |
$html = make_attr_value("readonly",$html);
|
|
|
409 |
$html = make_attr_value("selected",$html);
|
|
|
410 |
|
|
|
411 |
$html = process_html($html);
|
|
|
412 |
$html = process_body($html);
|
|
|
413 |
|
|
|
414 |
$html = process_head($html);
|
|
|
415 |
$html = process_p($html);
|
|
|
416 |
|
|
|
417 |
$html = escape_amp($html);
|
|
|
418 |
$html = escape_lt($html);
|
|
|
419 |
$html = escape_gt($html);
|
|
|
420 |
|
|
|
421 |
$html = escape_textarea_content($html);
|
|
|
422 |
|
|
|
423 |
process_tables($html,0);
|
|
|
424 |
|
|
|
425 |
process_lists($html,0);
|
|
|
426 |
process_deflists($html,0);
|
|
|
427 |
process_selects($html,0);
|
|
|
428 |
|
|
|
429 |
$html = fix_tags($html);
|
|
|
430 |
$html = fix_attrs($html);
|
|
|
431 |
|
|
|
432 |
$html = insert_styles($html, $styles);
|
|
|
433 |
|
|
|
434 |
return $html;
|
|
|
435 |
}
|
|
|
436 |
|
|
|
437 |
function escape_textarea_content($html) {
|
|
|
438 |
preg_match_all('#<textarea(.*)>(.*)<\s*/\s*textarea\s*>#Uis', $html, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER);
|
|
|
439 |
|
|
|
440 |
// Why cycle from the last to first match?
|
|
|
441 |
// It will keep unprocessed matches offsets valid,
|
|
|
442 |
// as escaped content may differ from original content in length,
|
|
|
443 |
for ($i = count($matches)-1; $i>=0; $i--) {
|
|
|
444 |
$match = $matches[$i];
|
|
|
445 |
$match_offset = $match[2][1];
|
|
|
446 |
$match_content = $match[2][0];
|
|
|
447 |
$match_length = strlen($match_content);
|
|
|
448 |
$escaped_content = preg_replace('/&([^#])/', '&\1',
|
|
|
449 |
str_replace('>', '>',
|
|
|
450 |
str_replace('<', '<', $match_content)));
|
|
|
451 |
$html = substr_replace($html, $escaped_content, $match_offset, $match_length);
|
|
|
452 |
};
|
|
|
453 |
|
|
|
454 |
return $html;
|
|
|
455 |
}
|
|
|
456 |
|
|
|
457 |
function lowercase_tags($html) {
|
|
|
458 |
$result = "";
|
|
|
459 |
|
|
|
460 |
while (preg_match("#^(.*?)(</?)([a-zA-z0-9]+)([\s>])#is",$html,$matches)) {
|
|
|
461 |
// Drop extracted part
|
|
|
462 |
$html = substr($html,strlen($matches[0]));
|
|
|
463 |
// Move extracted part to the result
|
|
|
464 |
$result .= $matches[1].$matches[2].strtolower($matches[3]).$matches[4];
|
|
|
465 |
};
|
|
|
466 |
|
|
|
467 |
return $result.$html;
|
|
|
468 |
};
|
|
|
469 |
|
|
|
470 |
function lowercase_closing_tags($html) {
|
|
|
471 |
$result = "";
|
|
|
472 |
|
|
|
473 |
while (preg_match("#^(.*?)(<)([a-zA-z0-9]+)(\s*/\s*>)#is",$html,$matches)) {
|
|
|
474 |
// Drop extracted part
|
|
|
475 |
$html = substr($html,strlen($matches[0]));
|
|
|
476 |
// Move extracted part to the result
|
|
|
477 |
$result .= $matches[1].$matches[2].strtolower($matches[3]).$matches[4];
|
|
|
478 |
};
|
|
|
479 |
|
|
|
480 |
return $result.$html;
|
|
|
481 |
};
|
|
|
482 |
|
|
|
483 |
?>
|