protected function hashHTMLBlocks($text)
{
if ($this->no_markup) {
return $text;
}
$less_than_tab = $this->tab_width - 1;
# Hashify HTML blocks:
# We only want to do this for block-level HTML tags, such as headers,
# lists, and tables. That's because we still want to wrap <p>s around
# "paragraphs" that are wrapped in non-block-level tags, such as anchors,
# phrase emphasis, and spans. The list of tags we're looking for is
# hard-coded:
#
# * List "a" is made of tags which can be both inline or block-level.
# These will be treated block-level when the start tag is alone on
# its line, otherwise they're not matched here and will be taken as
# inline later.
# * List "b" is made of tags which are always block-level;
#
$block_tags_a_re = 'ins|del';
$block_tags_b_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|' . 'script|noscript|form|fieldset|iframe|math|svg|' . 'article|section|nav|aside|hgroup|header|footer|' . 'figure';
# Regular expression for the content of a block tag.
$nested_tags_level = 4;
$attr = '
(?> # optional tag attributes
\\s # starts with whitespace
(?>
[^>"/]+ # text outside quotes
|
/+(?!>) # slash not followed by ">"
|
"[^"]*" # text inside double quotes (tolerate ">")
|
\'[^\']*\' # text inside single quotes (tolerate ">")
)*
)?
';
$content = str_repeat('
(?>
[^<]+ # content without tag
|
<\\2 # nested opening tag
' . $attr . ' # attributes
(?>
/>
|
>', $nested_tags_level) . '.*?' . str_repeat('
</\\2\\s*> # closing nested tag
)
|
<(?!/\\2\\s*> # other tags with a different name
)
)*', $nested_tags_level);
$content2 = str_replace('\\2', '\\3', $content);
# First, look for nested blocks, e.g.:
# <div>
# <div>
# tags for inner block must be indented.
# </div>
# </div>
#
# The outermost tags must start at the left margin for this to match, and
# the inner nested divs must be indented.
# We need to do this before the next, more liberal match, because the next
# match will start at the first `<div>` and stop at the first `</div>`.
$text = preg_replace_callback('{(?>
(?>
(?<=\\n\\n) # Starting after a blank line
| # or
\\A\\n? # the beginning of the doc
)
( # save in $1
# Match from `\\n<tag>` to `</tag>\\n`, handling nested tags
# in between.
[ ]{0,' . $less_than_tab . '}
<(' . $block_tags_b_re . ')# start tag = $2
' . $attr . '> # attributes followed by > and \\n
' . $content . ' # content, support nesting
</\\2> # the matching end tag
[ ]* # trailing spaces/tabs
(?=\\n+|\\Z) # followed by a newline or end of document
| # Special version for tags of group a.
[ ]{0,' . $less_than_tab . '}
<(' . $block_tags_a_re . ')# start tag = $3
' . $attr . '>[ ]*\\n # attributes followed by >
' . $content2 . ' # content, support nesting
</\\3> # the matching end tag
[ ]* # trailing spaces/tabs
(?=\\n+|\\Z) # followed by a newline or end of document
| # Special case just for <hr />. It was easier to make a special
# case than to make the other regex more complicated.
[ ]{0,' . $less_than_tab . '}
<(hr) # start tag = $2
' . $attr . ' # attributes
/?> # the matching end tag
[ ]*
(?=\\n{2,}|\\Z) # followed by a blank line or end of document
| # Special case for standalone HTML comments:
[ ]{0,' . $less_than_tab . '}
(?s:
<!-- .*? -->
)
[ ]*
(?=\\n{2,}|\\Z) # followed by a blank line or end of document
| # PHP and ASP-style processor instructions (<? and <%)
[ ]{0,' . $less_than_tab . '}
(?s:
<([?%]) # $2
.*?
\\2>
)
[ ]*
(?=\\n{2,}|\\Z) # followed by a blank line or end of document
)
)}Sxmi', array(&$this, '_hashHTMLBlocks_callback'), $text);
return $text;
}
