Module: MaRuKu::In::Markdown::BlockLevelParser

Includes:
Helpers, SpanLevelParser, Strings, REXML
Included in:
MDDocument
Defined in:
lib/maruku.rb,
lib/maruku/input/parse_doc.rb,
lib/maruku/input/linesource.rb,
lib/maruku/input/parse_block.rb

Defined Under Namespace

Classes: BlockContext, LineSource

Constant Summary

Constants included from SpanLevelParser

SpanLevelParser::CharSource, SpanLevelParser::Close_class, SpanLevelParser::EscapedCharInInlineCode, SpanLevelParser::EscapedCharInQuotes, SpanLevelParser::EscapedCharInText, SpanLevelParser::Punct_class, SpanLevelParser::R_REF_ID, SpanLevelParser::Rules, SpanLevelParser::SPACE

Constants included from Strings

Strings::Abbreviation, Strings::AttributeDefinitionList, Strings::Definition, Strings::EMailAddress, Strings::FootnoteText, Strings::HeaderWithAttributes, Strings::HeaderWithId, Strings::IncompleteLink, Strings::InlineAttributeList, Strings::LinkRegex, Strings::MightBeTableHeader, Strings::Sep, Strings::TabSize, Strings::TableSeparator

Instance Method Summary collapse

Methods included from SpanLevelParser

#apply_one_rule, #describe_pos, #educate, #extension_meta, #interpret_extension, #is_ial, #md_al, #merge_ial, #parse_lines_as_span, #parse_span_better, #read_attribute_list, #read_em, #read_email_el, #read_emstrong, #read_footnote_ref, #read_image, #read_inline_code, #read_inline_html, #read_link, #read_quoted, #read_quoted_or_unquoted, #read_ref_id, #read_simple, #read_span, #read_strong, #read_url, #read_url_el, #read_xml_instr_span, #unit_tests_for_attribute_lists

Methods included from Helpers

#md_abbr, #md_abbr_def, #md_ald, #md_br, #md_code, #md_codeblock, #md_el, #md_em, #md_email, #md_emstrong, #md_entity, #md_foot_ref, #md_footnote, #md_header, #md_hrule, #md_html, #md_ial, #md_im_image, #md_im_link, #md_image, #md_li, #md_link, #md_par, #md_quote, #md_ref_def, #md_strong, #md_url, #md_xml_instr

Methods included from Strings

#add_tabs, #dbg_describe_ary, #force_linebreak?, #line_md_type, #normalize_key_and_value, #num_leading_hashes, #number_of_leading_spaces, #parse_email_headers, #sanitize_ref_id, #spaces_before_first_char, #split_lines, #strip_hashes, #strip_indent, #unquote

Instance Method Details

#eventually_comes_a_def_list(src) ⇒ Object

If current line is text, a definition list is coming if 1) text,empty,*,definition



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# File 'lib/maruku/input/parse_block.rb', line 554

def eventually_comes_a_def_list(src)
	future = src.tell_me_the_future
	ok = future =~ %r{^t+e?d}x
#		puts "future: #{future} - #{ok}"
	ok
end

#execute_code_blocks ⇒ Object 



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# File 'lib/maruku/input/parse_doc.rb', line 161

def execute_code_blocks
	self.each_element(:xml_instr) do |e|
		if e.target == 'maruku'
			result = safe_execute_code(e, e.code)
			if result.kind_of?(String)
				puts "Result is : #{result.inspect}"
			end
		end
	end
end

#expand_attribute_list(al, result) ⇒ Object

Expands an attribute list in an Hash



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# File 'lib/maruku/input/parse_doc.rb', line 101

def expand_attribute_list(al, result)
	al.each do |k, v|
		case k
		when :class
			if not result[:class]
				result[:class] = v
			else
				result[:class] += " " + v
			end
		when :id; result[:id] = v
		when :ref; 
			if self.ald[v]
				already = (result[:expanded_references] ||= [])
				if not already.include?(v)
					already.push v
					expand_attribute_list(self.ald[v], result)
				else
					already.push  v
					maruku_error "Circular reference between labels.\n\n"+
					"Label #{v.inspect} calls itself via recursion.\nThe recursion is "+
						(already.map{|x| x.inspect}.join(' => ')) 
				end
			else
				if not result[:unresolved_references]
					result[:unresolved_references] = v
				else
					result[:unresolved_references] << " #{v}"
				end
				
			#	$stderr.puts "Unresolved reference #{v.inspect} (avail: #{self.ald.keys.inspect})"
				result[v.to_sym] = true
			end
		else
			result[k.to_sym]=v
		end
	end
end

#parse_blocks(src) ⇒ Object

Input is a LineSource



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# File 'lib/maruku/input/parse_block.rb', line 45

def parse_blocks(src)
	output = BlockContext.new
	
	# run state machine
	while src.cur_line
		
		next if check_block_extensions(src, output, src.cur_line)
		
#  Prints detected type (useful for debugging)
#			puts "#{src.cur_line.md_type}|#{src.cur_line}"
		case src.cur_line.md_type
			when :empty; 
				output.push :empty
				src.ignore_line
			when :ial
				m =  InlineAttributeList.match src.shift_line
				content = m[1] ||  "" 
#					puts "Content: #{content.inspect}"
				src2 = CharSource.new(content, src)
				interpret_extension(src2, output, [nil])
			when :ald
				output.push read_ald(src)
			when :text
				# paragraph, or table, or definition list
				read_text_material(src, output)
			when :header2, :hrule
				# hrule
				src.shift_line
				output.push md_hrule()
			when :header3
				output.push read_header3(src)
			when :ulist, :olist
				list_type = src.cur_line.md_type == :ulist ? :ul : :ol
				li = read_list_item(src)
				# append to current list if we have one
				if output.last.kind_of?(MDElement) && 
					output.last.node_type == list_type then
					output.last.children << li
				else
					output.push md_el(list_type, [li])
				end
			when :quote;    output.push read_quote(src)
			when :code;     e = read_code(src); output << e if e
			when :raw_html; e = read_raw_html(src); output << e if e

			when :footnote_text;   output.push read_footnote_text(src)
			when :ref_definition;  
				if src.parent && (src.cur_index == 0)
					read_text_material(src, output)
				else
					read_ref_definition(src, output)
				end
			when :abbreviation;    output.push read_abbreviation(src)
			when :xml_instr;       read_xml_instruction(src, output)
			when :metadata;        
				maruku_error "Please use the new meta-data syntax: \n"+
				"  http://maruku.rubyforge.org/proposal.html\n", src
				src.ignore_line
			else # warn if we forgot something
				md_type = src.cur_line.md_type
				line = src.cur_line
				maruku_error "Ignoring line '#{line}' type = #{md_type}", src
				src.shift_line
		end
	end

	merge_ial(output, src, output)
	output.delete_if {|x| x.kind_of?(MDElement) &&
		x.node_type == :ial}
	
	# get rid of empty line markers
	output.delete_if {|x| x == :empty}
	# See for each list if we can omit the paragraphs and use li_span
	# TODO: do this after
	output.each do |c| 
		# Remove paragraphs that we can get rid of
		if [:ul,:ol].include? c.node_type 
			if c.children.all? {|li| !li.want_my_paragraph} then
				c.children.each do |d|
					d.node_type = :li_span
					d.children = d.children[0].children 
				end
			end
		end 
		if c.node_type == :definition_list
			if c.children.all?{|defi| !defi.want_my_paragraph} then
				c.children.each do |definition| 
					definition.definitions.each do |dd|
						dd.children = dd.children[0].children 
					end
				end
			end
		end 
	end
	
	output
end

#parse_doc(s) ⇒ Object 



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# File 'lib/maruku/input/parse_doc.rb', line 27

def parse_doc(s)
	# FIXME \r\n => \n
	meta2 =  parse_email_headers(s)
	data = meta2[:data]
	meta2.delete :data
	
	self.attributes.merge! meta2
	
=begin maruku_doc
Attribute: encoding
Scope:     document
Summary:   Encoding for the document.

If the `encoding` attribute is specified, then the content
will be converted from the specified encoding to UTF-8.

Conversion happens using the `iconv` library.
=end

	enc = self.attributes[:encoding]
	self.attributes.delete :encoding
	if enc && enc.downcase != 'utf-8'
		converted = Iconv.new('utf-8', enc).iconv(data)
		
#			puts "Data: #{data.inspect}: #{data}"
#			puts "Conv: #{converted.inspect}: #{converted}"
		
		data = converted
	end
	
	@children = parse_text_as_markdown(data)
	
	if true #markdown_extra? 
		self.search_abbreviations
		self.substitute_markdown_inside_raw_html
	end
	
	toc = create_toc

	# use title if not set
	if not self.attributes[:title] and toc.header_element
		title = toc.header_element.to_s
		self.attributes[:title]  = title
#			puts "Set document title to #{title}"
	end
	
	# save for later use
	self.toc = toc
	
	# Now do the attributes magic
	each_element do |e|
		# default attribute list
		if default = self.ald[e.node_type.to_s]
			expand_attribute_list(default, e.attributes)
		end
		expand_attribute_list(e.al, e.attributes)
#			puts "#{e.node_type}: #{e.attributes.inspect}"
	end

=begin maruku_doc
Attribute: unsafe_features
Scope:     global
Summary:   Enables execution of XML instructions.

Disabled by default because of security concerns.
=end

	if Maruku::Globals[:unsafe_features]
		self.execute_code_blocks
		# TODO: remove executed code blocks
	end
end

#parse_text_as_markdown(text) ⇒ Object

Splits the string and calls parse_lines_as_markdown



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# File 'lib/maruku/input/parse_block.rb', line 38

def parse_text_as_markdown(text)
	lines =  split_lines(text)
	src = LineSource.new(lines)
	return parse_blocks(src)
end

#read_abbreviation(src) ⇒ Object 



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# File 'lib/maruku/input/parse_block.rb', line 306

def read_abbreviation(src)
	if not (l=src.shift_line) =~ Abbreviation
		maruku_error "Bug: it's Andrea's fault. Tell him.\n#{l.inspect}"
	end
	
	abbr = $1
	desc = $2
	
	if (not abbr) or (abbr.size==0)
		maruku_error "Bad abbrev. abbr=#{abbr.inspect} desc=#{desc.inspect}"
	end
	
	self.abbreviations[abbr] = desc
	
	return md_abbr_def(abbr, desc)
end

#read_ald(src) ⇒ Object 



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# File 'lib/maruku/input/parse_block.rb', line 163

def read_ald(src)
	if (l=src.shift_line) =~ AttributeDefinitionList
		id = $1;   al=$2;
		al = read_attribute_list(CharSource.new(al,src), context=nil, break_on=[nil])
		self.ald[id] = al;
		return md_ald(id, al)
	else
		maruku_error "Bug Bug:\n#{l.inspect}"
		return nil
	end
end

#read_code(src) ⇒ Object 



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# File 'lib/maruku/input/parse_block.rb', line 432

def read_code(src)
	# collect all indented lines
	lines = []
	while src.cur_line && ([:code, :empty].include? src.cur_line.md_type)
		lines << strip_indent(src.shift_line, 4)
	end
	
	#while lines.last && (lines.last.md_type == :empty )
	while lines.last && lines.last.strip.size == 0
		lines.pop 
	end

	while lines.first && lines.first.strip.size == 0
		lines.shift 
	end
	
	return nil if lines.empty?

	source = lines.join("\n")
	
#		dbg_describe_ary(lines, 'CODE')

	return md_codeblock(source)
end

#read_definition(src) ⇒ Object 



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# File 'lib/maruku/input/parse_block.rb', line 562

def read_definition(src)
	# Read one or more terms
	terms = []
	while  src.cur_line &&  src.cur_line.md_type == :text
		terms << md_el(:definition_term, parse_lines_as_span([src.shift_line]))
	end
#		dbg_describe_ary(terms, 'DT')

	want_my_paragraph = false

	raise "Chunky Bacon!" if not src.cur_line

	# one optional empty
	if src.cur_line.md_type == :empty
		want_my_paragraph = true
		src.shift_line
	end
	
	raise "Chunky Bacon!" if src.cur_line.md_type != :definition
	
	# Read one or more definitions
	definitions = []
	while src.cur_line && src.cur_line.md_type == :definition
		parent_offset = src.cur_index
			
		first = src.shift_line
		first =~ Definition
		first = $1
		
		# I know, it's ugly!!!

		lines, w_m_p = 
			read_indented_content(src,4, [:definition], :definition)
		want_my_paragraph ||= w_m_p
	
		lines.unshift first
		
#			dbg_describe_ary(lines, 'DD')
		src2 = LineSource.new(lines, src, parent_offset)
		children = parse_blocks(src2)
		definitions << md_el(:definition_data, children)
	end
	
	return md_el(:definition, terms+definitions, { 	
		:terms => terms, 
		:definitions => definitions, 
		:want_my_paragraph => want_my_paragraph})
end

#read_footnote_text(src) ⇒ Object 



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# File 'lib/maruku/input/parse_block.rb', line 323

def read_footnote_text(src)
	parent_offset = src.cur_index
		
	first = src.shift_line
	
	if not first =~ FootnoteText 
		maruku_error "Bug (it's Andrea's fault)"
	end
	
	id = $1
	text = $2

	# Ugly things going on inside `read_indented_content`
	indentation = 4 #first.size-text.size
	
#		puts "id =_#{id}_; text=_#{text}_ indent=#{indentation}"
	
	break_list = [:footnote_text]
	item_type = :footnote_text
	lines, want_my_paragraph = 
		read_indented_content(src,indentation, break_list, item_type)

	# add first line
	if text && text.strip != "" then lines.unshift text end
	
#		dbg_describe_ary(lines, 'FOOTNOTE')
	src2 = LineSource.new(lines, src, parent_offset)
	children = parse_blocks(src2)
	
	e = md_footnote(id, children)
	self.footnotes[id] = e
	return e
end

#read_header12(src) ⇒ Object

reads a header (with —– or ========)



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# File 'lib/maruku/input/parse_block.rb', line 176

def read_header12(src)
	line = src.shift_line.strip
	al = nil
	# Check if there is an IAL
	if new_meta_data? and line =~ /^(.*)\{(.*)\}\s*$/
		line = $1.strip
		ial = $2
		al  = read_attribute_list(CharSource.new(ial,src), context=nil, break_on=[nil])
	end
	text = parse_lines_as_span [ line ]
	level = src.cur_line.md_type == :header2 ? 2 : 1;  
	src.shift_line
	return md_header(level, text, al)
end

#read_header3(src) ⇒ Object

reads a header like ‘#### header ####’



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# File 'lib/maruku/input/parse_block.rb', line 192

def read_header3(src)
	line = src.shift_line.strip
	al = nil
	# Check if there is an IAL
	if new_meta_data? and line =~ /^(.*)\{(.*)\}\s*$/
		line = $1.strip
		ial = $2
		al  = read_attribute_list(CharSource.new(ial,src), context=nil, break_on=[nil])
	end
	level = num_leading_hashes(line)
	text = parse_lines_as_span [strip_hashes(line)] 
	return md_header(level, text, al)
end

#read_indented_content(src, indentation, break_list, item_type) ⇒ Object

This is the only ugly function in the code base. It is used to read list items, descriptions, footnote text



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# File 'lib/maruku/input/parse_block.rb', line 360

def read_indented_content(src, indentation, break_list, item_type)
	lines =[]
	# collect all indented lines
	saw_empty = false; saw_anything_after = false
	while src.cur_line 
#			puts "Reading indent = #{indentation} #{src.cur_line.inspect}"
		#puts "#{src.cur_line.md_type} #{src.cur_line.inspect}"
		if src.cur_line.md_type == :empty
			saw_empty = true
			lines << src.shift_line
			next
		end
	
		# after a white line
		if saw_empty
			# we expect things to be properly aligned
			if (ns=number_of_leading_spaces(src.cur_line)) < indentation
				#puts "breaking for spaces, only #{ns}: #{src.cur_line}"
				break
			end
			saw_anything_after = true
		else
#				if src.cur_line[0] != ?\ 
				break if break_list.include? src.cur_line.md_type
#				end
#				break if src.cur_line.md_type != :text
		end
	

		stripped = strip_indent(src.shift_line, indentation)
		lines << stripped

		#puts "Accepted as #{stripped.inspect}"
	
		# You are only required to indent the first line of 
		# a child paragraph.
		if stripped.md_type == :text
			while src.cur_line && (src.cur_line.md_type == :text)
				lines << strip_indent(src.shift_line, indentation)
			end
		end
	end

	want_my_paragraph = saw_anything_after || 
		(saw_empty && (src.cur_line  && (src.cur_line.md_type == item_type))) 

#		dbg_describe_ary(lines, 'LI')
	# create a new context 

	while lines.last && (lines.last.md_type == :empty)
		lines.pop
	end
	
	return lines, want_my_paragraph
end

#read_list_item(src) ⇒ Object

Reads one list item, either ordered or unordered.



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# File 'lib/maruku/input/parse_block.rb', line 280

def read_list_item(src)
	parent_offset = src.cur_index
	
	item_type = src.cur_line.md_type
	first = src.shift_line

	indentation = spaces_before_first_char(first)
	break_list = [:ulist, :olist, :ial]
	# Ugly things going on inside `read_indented_content`
	lines, want_my_paragraph = 
		read_indented_content(src,indentation, break_list, item_type)

	# add first line
		# Strip first '*', '-', '+' from first line
		stripped = first[indentation, first.size-1]
	lines.unshift stripped
	
	# dbg_describe_ary(lines, 'LIST ITEM ')

	src2 = LineSource.new(lines, src, parent_offset)
	children = parse_blocks(src2)
	with_par = want_my_paragraph || (children.size>1)
	
	return md_li(children, with_par)
end

#read_metadata(src) ⇒ Object

Reads a series of metadata lines with empty lines in between



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# File 'lib/maruku/input/parse_block.rb', line 458

def read_metadata(src)
	hash = {}
	while src.cur_line 
		case src.cur_line.md_type
			when :empty;  src.shift_line
			when :metadata; hash.merge! parse_metadata(src.shift_line)
			else break
		end
	end
	hash
end

#read_paragraph(src) ⇒ Object 



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# File 'lib/maruku/input/parse_block.rb', line 257

def read_paragraph(src)
	lines = [src.shift_line]
	while src.cur_line 
		# :olist does not break
		case t = src.cur_line.md_type
			when :quote,:header3,:empty,:ref_definition,:ial #,:xml_instr,:raw_html
				break
			when :olist,:ulist
				break if src.next_line.md_type == t
		end
		break if src.cur_line.strip.size == 0			
		break if [:header1,:header2].include? src.next_line.md_type
		break if any_matching_block_extension?(src.cur_line) 
		
		lines << src.shift_line
	end
#		dbg_describe_ary(lines, 'PAR')
	children = parse_lines_as_span(lines, src)

	return md_par(children)
end

#read_quote(src) ⇒ Object 



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# File 'lib/maruku/input/parse_block.rb', line 417

def read_quote(src)
	parent_offset = src.cur_index
		
	lines = []
	# collect all indented lines
	while src.cur_line && src.cur_line.md_type == :quote
		lines << unquote(src.shift_line)
	end
#		dbg_describe_ary(lines, 'QUOTE')

	src2 = LineSource.new(lines, src, parent_offset)
	children = parse_blocks(src2)
	return md_quote(children)
end

#read_raw_html(src) ⇒ Object 



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# File 'lib/maruku/input/parse_block.rb', line 235

def read_raw_html(src)
	h = HTMLHelper.new
	begin 
		h.eat_this(l=src.shift_line)
#			puts "\nBLOCK:\nhtml -> #{l.inspect}"
		while src.cur_line and not h.is_finished? 
			l=src.shift_line
#				puts "html -> #{l.inspect}"
			h.eat_this "\n"+l
		end
	rescue Exception => e
		ex = e.inspect + e.backtrace.join("\n")
		maruku_error "Bad block-level HTML:\n#{add_tabs(ex,1,'|')}\n", src
	end
	if not (h.rest =~ /^\s*$/)
		maruku_error "Could you please format this better?\n"+
			"I see that #{h.rest.inspect} is left after the raw HTML.", src
	end
	raw_html = h.stuff_you_read
	return md_html(raw_html)
end

#read_ref_definition(src, out) ⇒ Object 



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# File 'lib/maruku/input/parse_block.rb', line 471

def read_ref_definition(src, out)	
	line = src.shift_line
	
	# if link is incomplete, shift next line
	if src.cur_line && (src.cur_line.md_type != :ref_definition) && 
		([1,2,3].include? number_of_leading_spaces(src.cur_line) )
		line += " "+ src.shift_line
	end
	
#		puts "total= #{line}"
	
	match = LinkRegex.match(line)
	if not match
		maruku_error "Link does not respect format: '#{line}'"
		return
	end
	
	id = match[1]; url = match[2]; title = match[3]; 
	id = sanitize_ref_id(id)
	
	hash = self.refs[id] = {:url=>url,:title=>title}
	
	stuff=match[4]
	
	if stuff
		stuff.split.each do |couple|
#					puts "found #{couple}"
			k, v = couple.split('=')
			v ||= ""
			if v[0,1]=='"' then v = v[1, v.size-2] end
#					puts "key:_#{k}_ value=_#{v}_"
			hash[k.to_sym] = v
		end
	end
#			puts hash.inspect
	
	out.push md_ref_def(id, url, meta={:title=>title})
end

#read_table(src) ⇒ Object 



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# File 'lib/maruku/input/parse_block.rb', line 516

def read_table(src)
	head = split_cells(src.shift_line).map{|s| md_el(:head_cell, parse_lines_as_span([s])) }
		
	separator=split_cells(src.shift_line)

	align = separator.map { |s|  s =~ Sep
		if $1 and $2 then :center elsif $2 then :right else :left end }
			
	num_columns = align.size
	
	if head.size != num_columns
		maruku_error "Table head does not have #{num_columns} columns: \n#{head.inspect}"
		tell_user "I will ignore this table."
		# XXX try to recover
		return md_br()
	end
			
	rows = []
	
	while src.cur_line && src.cur_line =~ /\|/
		row = split_cells(src.shift_line).map{|s|
			md_el(:cell, parse_lines_as_span([s]))}
		if head.size != num_columns
			maruku_error  "Row does not have #{num_columns} columns: \n#{row.inspect}"
			tell_user "I will ignore this table."
			# XXX try to recover
			return md_br()
		end
		rows << row
	end

	children = (head+rows).flatten
	return md_el(:table, children, {:align => align})
end

#read_text_material(src, output) ⇒ Object 



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# File 'lib/maruku/input/parse_block.rb', line 143

def read_text_material(src, output)
	if src.cur_line =~ MightBeTableHeader and 
		(src.next_line && src.next_line =~ TableSeparator)
		output.push read_table(src)
	elsif [:header1,:header2].include? src.next_line.md_type
		output.push read_header12(src)
	elsif eventually_comes_a_def_list(src)
	 	definition = read_definition(src)
		if output.last.kind_of?(MDElement) && 
			output.last.node_type == :definition_list then
			output.last.children << definition
		else
			output.push md_el(:definition_list, [definition])
		end
	else # Start of a paragraph
		output.push read_paragraph(src)
	end
end

#read_xml_instruction(src, output) ⇒ Object 



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# File 'lib/maruku/input/parse_block.rb', line 206

def read_xml_instruction(src, output)
	m = /^\s*<\?((\w+)\s*)?(.*)$/.match src.shift_line
	raise "BugBug" if not m
	target = m[2] || ''
	code = m[3]
	until code =~ /\?>/
		code += "\n"+src.shift_line
	end
	if not code =~ (/\?>\s*$/)
		garbage = (/\?>(.*)$/.match(code))[1]
		maruku_error "Trailing garbage on last line: #{garbage.inspect}:\n"+
			add_tabs(code, 1, '|'), src
	end
	code.gsub!(/\?>\s*$/, '')
	
	if target == 'mrk' && MaRuKu::Globals[:unsafe_features]
		result = safe_execute_code(self, code)	
		if result
			if result.kind_of? String
				raise "Not expected"
			else
				output.push(*result)
			end
		end
	else
		output.push md_xml_instr(target, code)
	end
end

#safe_execute_code(object, code) ⇒ Object 



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# File 'lib/maruku/input/parse_doc.rb', line 139

def safe_execute_code(object, code)
	begin
		return object.instance_eval(code)
	rescue Exception => e
		maruku_error "Exception while executing this:\n"+
			add_tabs(code, 1, ">")+
			"\nThe error was:\n"+
			add_tabs(e.inspect+"\n"+e.caller.join("\n"), 1, "|")
	rescue RuntimeError => e
		maruku_error "2: Exception while executing this:\n"+
			add_tabs(code, 1, ">")+
			"\nThe error was:\n"+
			add_tabs(e.inspect, 1, "|")
	rescue SyntaxError => e
		maruku_error "2: Exception while executing this:\n"+
			add_tabs(code, 1, ">")+
			"\nThe error was:\n"+
			add_tabs(e.inspect, 1, "|")
	end
	nil
end

#search_abbreviations ⇒ Object 



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# File 'lib/maruku/input/parse_doc.rb', line 172

def search_abbreviations
	self.abbreviations.each do |abbrev, title|
		reg = Regexp.new(Regexp.escape(abbrev))
		self.replace_each_string do |s|
			# bug if many abbreviations are present (agorf)
			if m = reg.match(s)
				e = md_abbr(abbrev.dup, title ? title.dup : nil)
				[m.pre_match, e, m.post_match]
			else
				s
			end
		end
	end
end

#split_cells(s) ⇒ Object 



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# File 'lib/maruku/input/parse_block.rb', line 510

def split_cells(s)
#		s.strip.split('|').select{|x|x.strip.size>0}.map{|x|x.strip}
# changed to allow empty cells
	s.strip.split('|').select{|x|x.size>0}.map{|x|x.strip}
end

#substitute_markdown_inside_raw_html ⇒ Object

(PHP Markdown extra) Search for elements that have markdown=1 or markdown=block defined



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# File 'lib/maruku/input/parse_doc.rb', line 190

def substitute_markdown_inside_raw_html
	self.each_element(:raw_html) do |e|
		doc = e.instance_variable_get :@parsed_html
		if doc # valid html
			# parse block-level markdown elements in these HTML tags
			block_tags = ['div']

			# use xpath to find elements with 'markdown' attribute
			XPath.match(doc, "//*[attribute::markdown]" ).each do |e|
#					puts "Found #{e}"
				# should we parse block-level or span-level?
				parse_blocks = (e.attributes['markdown'] == 'block') || 
				               block_tags.include?(e.name)
				# remove 'markdown' attribute
				e.delete_attribute 'markdown'
				# Select all text elements of e
				XPath.match(e, "//text()" ).each { |original_text| 
					s = original_text.value.strip
					if s.size > 0
						el = md_el(:dummy,
						 	parse_blocks ? parse_text_as_markdown(s) :
						                  parse_lines_as_span([s]) )
						p = original_text.parent
						el.children_to_html.each do |x|
							p.insert_before(original_text, x)
						end
						p.delete(original_text)
						
					end
				}
					
			end
			
		end
	end
end