+global\Markdown_Parser::processListItems()

Complexity

Conditions	1
Paths	1

Size

Total Lines	48
Code Lines	10

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php
		public function processListItems( $list_str, $marker_any_re ) {

			//
			// Process the contents of a single ordered or unordered list, splitting it
			// into individual list items.
			//
			// The $this->list_level global keeps track of when we're inside a list.
			// Each time we enter a list, we increment it; when we leave a list,
			// we decrement. If it's zero, we're not in a list anymore.
			//
			// We do this because when we're not inside a list, we want to treat
			// something like this:
			//
			// I recommend upgrading to version
			// 8. Oops, now this line is treated
			// as a sub-list.
			//
			// As a single paragraph, despite the fact that the second line starts
			// with a digit-period-space sequence.
			//
			// Whereas when we're inside a list (or sub-list), that line will be
			// treated as the start of a sub-list. What a kludge, huh? This is
			// an aspect of Markdown's syntax that's hard to parse perfectly
			// without resorting to mind-reading. Perhaps the solution is to
			// change the syntax rules such that sub-lists must start with a
			// starting cardinal number; e.g. "1." or "a.".
			$this->list_level ++;

			// trim trailing blank lines:
			$list_str = preg_replace( "/\n{2,}\\z/", "\n", $list_str );

			$list_str = preg_replace_callback(
				'{
			(\n)?							# leading line = $1
			(^[ ]*)							# leading whitespace = $2
			(' . $marker_any_re . '				# list marker and space = $3
				(?:[ ]+|(?=\n))	# space only required if item is not empty
			)
			((?s:.*?))						# list item text   = $4
			(?:(\n+(?=\n))|\n)				# tailing blank line = $5
			(?= \n* (\z | \2 (' . $marker_any_re . ') (?:[ ]+|(?=\n))))
			}xm', array( &$this, '_processListItems_callback' ), $list_str
			);

			$this->list_level --;

			return $list_str;
		}