/**
* Callback function: <tag> | </tag> | ....
* @return string
* @internal
*/
public function cb($matches)
{
// html tag
list(, $mText, $mComment, $mEnd, $mTag, $mAttr, $mEmpty) = $matches;
// [1] => text
// [1] => !-- comment --
// [2] => /
// [3] => TAG
// [4] => ... (attributes)
// [5] => / (empty)
$s = '';
// phase #1 - stuff between tags
if ($mText !== '') {
$item = reset($this->tagStack);
if ($item && !isset($item['dtdContent']['%DATA'])) {
// text not allowed?
} elseif (array_intersect(array_keys($this->tagUsed, TRUE), $this->preserveSpaces)) {
// inside pre & textarea preserve spaces
$s = Texy\Helpers::freezeSpaces($mText);
} else {
$s = Regexp::replace($mText, '#[ \\n]+#', ' ');
// otherwise shrink multiple spaces
}
}
// phase #2 - HTML comment
if ($mComment) {
return $s . '<' . Texy\Helpers::freezeSpaces($mComment) . '>';
}
// phase #3 - HTML tag
$mEmpty = $mEmpty || isset(HtmlElement::$emptyElements[$mTag]);
if ($mEmpty && $mEnd) {
return $s;
// bad tag; /end/
}
if ($mEnd) {
// end tag
// has start tag?
if (empty($this->tagUsed[$mTag])) {
return $s;
}
// autoclose tags
$tmp = [];
$back = TRUE;
foreach ($this->tagStack as $i => $item) {
$tag = $item['tag'];
$s .= $item['close'];
$this->space -= $item['indent'];
$this->tagUsed[$tag]--;
$back = $back && isset(HtmlElement::$inlineElements[$tag]);
unset($this->tagStack[$i]);
if ($tag === $mTag) {
break;
}
array_unshift($tmp, $item);
}
if (!$back || !$tmp) {
return $s;
}
// allowed-check (nejspis neni ani potreba)
$item = reset($this->tagStack);
$dtdContent = $item ? $item['dtdContent'] : $this->baseDTD;
if (!isset($dtdContent[$tmp[0]['tag']])) {
return $s;
}
// autoopen tags
foreach ($tmp as $item) {
$s .= $item['open'];
$this->space += $item['indent'];
$this->tagUsed[$item['tag']]++;
array_unshift($this->tagStack, $item);
}
} else {
// start tag
$dtdContent = $this->baseDTD;
if (!isset($this->texy->dtd[$mTag])) {
// unknown (non-html) tag
$allowed = TRUE;
$item = reset($this->tagStack);
if ($item) {
$dtdContent = $item['dtdContent'];
}
} else {
// optional end tag closing
foreach ($this->tagStack as $i => $item) {
// is tag allowed here?
$dtdContent = $item['dtdContent'];
if (isset($dtdContent[$mTag])) {
break;
}
$tag = $item['tag'];
// auto-close hidden, optional and inline tags
if ($item['close'] && (!isset(HtmlElement::$optionalEnds[$tag]) && !isset(HtmlElement::$inlineElements[$tag]))) {
break;
}
// close it
$s .= $item['close'];
$this->space -= $item['indent'];
$this->tagUsed[$tag]--;
unset($this->tagStack[$i]);
$dtdContent = $this->baseDTD;
}
// is tag allowed in this content?
$allowed = isset($dtdContent[$mTag]);
// check deep element prohibitions
if ($allowed && isset(HtmlElement::$prohibits[$mTag])) {
foreach (HtmlElement::$prohibits[$mTag] as $pTag) {
if (!empty($this->tagUsed[$pTag])) {
$allowed = FALSE;
break;
}
}
}
}
// empty elements se neukladaji do zasobniku
if ($mEmpty) {
if (!$allowed) {
return $s;
}
if ($this->xml) {
$mAttr .= ' /';
}
$indent = $this->indent && !array_intersect(array_keys($this->tagUsed, TRUE), $this->preserveSpaces);
if ($indent && $mTag === 'br') {
// formatting exception
return rtrim($s) . '<' . $mTag . $mAttr . ">\n" . str_repeat("\t", max(0, $this->space - 1)) . "";
} elseif ($indent && !isset(HtmlElement::$inlineElements[$mTag])) {
$space = "\r" . str_repeat("\t", $this->space);
return $s . $space . '<' . $mTag . $mAttr . '>' . $space;
} else {
return $s . '<' . $mTag . $mAttr . '>';
}
}
$open = NULL;
$close = NULL;
$indent = 0;
/*
if (!isset(Texy\HtmlElement::$inlineElements[$mTag])) {
// block tags always decorate with \n
$s .= "\n";
$close = "\n";
}
*/
if ($allowed) {
$open = '<' . $mTag . $mAttr . '>';
// receive new content (ins & del are special cases)
if (!empty($this->texy->dtd[$mTag][1])) {
$dtdContent = $this->texy->dtd[$mTag][1];
}
// format output
if ($this->indent && !isset(HtmlElement::$inlineElements[$mTag])) {
$close = "" . '</' . $mTag . '>' . "\n" . str_repeat("\t", $this->space);
$s .= "\n" . str_repeat("\t", $this->space++) . $open . "";
$indent = 1;
} else {
$close = '</' . $mTag . '>';
$s .= $open;
}
// TODO: problematic formatting of select / options, object / params
}
// open tag, put to stack, increase counter
$item = ['tag' => $mTag, 'open' => $open, 'close' => $close, 'dtdContent' => $dtdContent, 'indent' => $indent];
array_unshift($this->tagStack, $item);
$tmp =& $this->tagUsed[$mTag];
$tmp++;
}
return $s;
}
