Class: MaRuKu::In::Markdown::SpanLevelParser::HTMLHelper

Inherits:
Object
  • Object
show all
Includes:
Strings
Defined in:
lib/maruku/input/html_helper.rb

Overview

I tried to do this with REXML, but wasn’t able to. (suggestions?)

Constant Summary collapse

Tag = 
%r{^<(/)?(\w+)\s*([^>]*)>}m
PartialTag = 
%r{^<.*}m
EverythingElse = 
%r{^[^<]+}m
CommentStart = 
%r{^<!--}x
CommentEnd = 
%r{^.*-->}
TO_SANITIZE = 
['img','hr']

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 Attribute Summary collapse

Instance Method Summary collapse

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, #spaces_before_first_char, #split_lines, #strip_hashes, #strip_indent, #unquote

Constructor Details

#initialize ⇒ HTMLHelper

Returns a new instance of HTMLHelper.



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# File 'lib/maruku/input/html_helper.rb', line 41

def initialize 
	@rest = ""
	@tag_stack = []
	@m = nil
	@already = ""
	self.state = :inside_element
end

Instance Attribute Details

#rest ⇒ Object (readonly)

Returns the value of attribute rest.



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# File 'lib/maruku/input/html_helper.rb', line 39

def rest
  @rest
end

#state ⇒ Object

:inside_element, :inside_tag, :inside_comment,



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# File 'lib/maruku/input/html_helper.rb', line 49

def state
  @state
end

Instance Method Details

#eat_this(line) ⇒ Object 



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# File 'lib/maruku/input/html_helper.rb', line 51

def eat_this(line)
	@rest = line  + @rest
	things_read = 0
	until @rest.empty?
		case self.state
			when :inside_comment
				if @m = CommentEnd.match(@rest)
					@already += @m.pre_match + @m.to_s
					@rest = @m.post_match
					self.state = :inside_element
				else 
					@already += @rest 
					@rest = ""
					self.state = :inside_comment
				end
			when :inside_element 
				if @m = CommentStart.match(@rest)
					things_read += 1
					@already += @m.pre_match + @m.to_s
					@rest = @m.post_match
					self.state = :inside_comment
				elsif @m = Tag.match(@rest) then
					things_read += 1
					handle_tag
					self.state = :inside_element
				elsif @m = PartialTag.match(@rest) then
					@already += @m.pre_match 
					@rest = @m.post_match
					@partial_tag = @m.to_s
					self.state = :inside_tag
				elsif @m = EverythingElse.match(@rest)
					@already += @m.pre_match + @m.to_s
					@rest = @m.post_match
					self.state = :inside_element
				else
					error "Malformed HTML: not complete: #{@rest.inspect}"
				end
			when :inside_tag
				if @m = /^[^>]*>/.match(@rest) then
					@partial_tag += @m.to_s
					@rest = @partial_tag + @m.post_match
					@partial_tag = nil
					self.state = :inside_element
				else
					@partial_tag += @rest
					@rest = ""
					self.state = :inside_tag
				end
			else
				raise "Bug bug: state = #{self.state.inspect}"
		end # not inside comment
		
#				puts inspect
#				puts "Read: #{@tag_stack.inspect}"
		break if is_finished? and things_read>0	
	end
end

#error(s) ⇒ Object

Raises:



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# File 'lib/maruku/input/html_helper.rb', line 151

def error(s)
	raise Exception, "Error: #{s} \n"+ inspect, caller
end

#handle_tag ⇒ Object 



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# File 'lib/maruku/input/html_helper.rb', line 109

def handle_tag()
	@already += @m.pre_match
	@rest = @m.post_match

	is_closing = !!@m[1]
	tag = @m[2]
	attributes = @m[3]


	is_single = false
	if attributes =~ /\A(.*)\/\Z/
		attributes = $1
		is_single = true
	end

#			puts "READ TAG #{@m.to_s.inspect} tag = #{tag} closing? #{is_closing} single = #{is_single}"
	
	if TO_SANITIZE.include? tag 
		attributes.strip!
#		puts "Attributes: #{attributes.inspect}"
		if attributes.size > 0
			@already +=  '<%s %s />' % [tag, attributes]
		else
			@already +=  '<%s />' % [tag]
		end
	elsif is_closing
		@already += @m.to_s
		if @tag_stack.empty?
			error "Malformed: closing tag #{tag.inspect} "+
			      "in empty list"
		end 
		if @tag_stack.last != tag
			error "Malformed: tag <#{tag}> "+
			      "closes <#{@tag_stack.last}>"
		end
		@tag_stack.pop
	else 
		@already += @m.to_s
		
		@tag_stack.push(tag) unless is_single
	end
end

#inspect ⇒ Object 



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# File 'lib/maruku/input/html_helper.rb', line 155

def inspect; "HTML READER\n state=#{self.state} "+
	"match=#{@m.to_s.inspect}\n"+
	"Tag stack = #{@tag_stack.inspect} \n"+
	"Before:\n"+
	add_tabs(@already,1,'|')+"\n"+
	"After:\n"+
	add_tabs(@rest,1,'|')+"\n"
	
end

#is_finished? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/maruku/input/html_helper.rb', line 170

def is_finished?
	(self.state == :inside_element)  and @tag_stack.empty?
end

#stuff_you_read ⇒ Object 



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# File 'lib/maruku/input/html_helper.rb', line 166

def stuff_you_read
	@already
end