Module: MathML::LaTeX::BuiltinEnvironments

Included in:

Parser

Defined in:

lib/math_ml/latex.rb,
lib/math_ml/latex.rb

Instance Method Summary

• #env_array ⇒ Object
• #env_array_row(layout) ⇒ Object
• #env_matrix ⇒ Object
• #env_matrix_row ⇒ Object
• #initialize ⇒ Object

Instance Method Details

#env_array ⇒ Object

Raises:

• (ParseError)

# File 'lib/math_ml/latex.rb', line 950

def env_array
	layout = @scanner.scan_block ? @scanner.matched : @scanner.scan(/./)
	l = Scanner.new(layout=~RE::BLOCK ? layout[RE::BLOCK, 1] : layout)
	t = Table.new
	aligns = Array.new
	vlines = Array.new
	vlined = l.check(/\|/)
	columned = false
	until l.eos?
		c = l.scan_any
		raise ParseError.new("Syntax error.", layout[/\A.*(#{Regexp.escape(c+l.rest)}.*\z)/m, 1]) unless c=~/[clr\|@]/

		if c=='|'
			aligns << Align::CENTER if vlined
			vlines << Line::SOLID
			vlined = true
			columned = false
		else
			vlines << Line::NONE if columned
			vlined = false
			columned = true
			case c
			when 'l'
				aligns << Align::LEFT
			when 'c'
				aligns << Align::CENTER
			when 'r'
				aligns << Align::RIGHT
			when '@'
				aligns << Align::CENTER
				l.scan_any
			end
		end
	end
	t.aligns = aligns
	t.vlines = vlines

	layout = layout[RE::BLOCK, 1] if layout=~RE::BLOCK
	raise ParseError.new('Need parameter here.') if layout==""

	hlines = Array.new
	row_parsed = false
	hlined = false
	until @scanner.peek_command=="end"
		raise ParseError.new('Matching \end not exist.') if @scanner.eos?
		if @scanner.peek_command=="hline"
			@scanner.scan_command
			t << Tr.new unless row_parsed
			hlines << Line::SOLID
			row_parsed = false
			hlined = true
		else
			hlines << Line::NONE if row_parsed
			t << env_array_row(l.string)
			@scanner.scan(RE::WBSLASH)
			row_parsed = true
			hlined = false
		end
	end
	t.hlines = hlines

	if hlined
		tr = Tr.new
		(0..vlines.size).each {|i| tr << Td.new}
		t << tr
	end

	@scanner.scan_command
	raise ParseError.new("Environment mismatched.") unless @scanner.check_block && @scanner[1]=="array"
	@scanner.scan_block
	t
end

#env_array_row(layout) ⇒ Object

Raises:

• (ParseError)

# File 'lib/math_ml/latex.rb', line 1023

def env_array_row(layout)
	l = Scanner.new(layout)
	r = Tr.new
	first_column = true
	vlined = l.check(/\|/)
	until l.eos?
		c = l.scan(/./)
		if c=='|'
			r << Td.new if vlined
			vlined = true
			next
		else
			vlined = false
			case c
			when 'r', 'l', 'c'
			when '@'
				r << parse_into(l.scan_any, Td.new)
				next
			end
			if first_column
				first_column = false
			else
				raise ParseError.new("Need more column.", @scanner.matched.to_s) unless @scanner.scan(/&/)
			end
			r << push_container(Td.new) do |td|
				td << parse_to_element(true) until @scanner.peek_command=="end" || @scanner.check(/(&|\\\\)/) || @scanner.eos?
			end
		end
	end
	r << Td.new if vlined
	raise ParseError.new("Too many column.") if @scanner.check(/&/)
	r
end

#env_matrix ⇒ Object

Raises:

• (ParseError)

# File 'lib/math_ml/latex.rb', line 1057

def env_matrix
	t = Table.new
	hlines = Array.new
	hlined = false
	row_parsed = false
	until @scanner.peek_command=="end"
		raise ParseError.new('Matching \end not exist.') if @scanner.eos?
		if @scanner.peek_command=="hline"
			@scanner.scan_command
			t << Tr.new unless row_parsed
			hlines << Line::SOLID
			row_parsed = false
			hlined = true
		else
			hlines << Line::NONE if row_parsed
			t << (r = Tr.new)
			r << (td=Td.new)
			until @scanner.check(RE::WBSLASH) || @scanner.peek_command=="end" || @scanner.eos?
				push_container(td) do |e|
					e << parse_to_element(true) until @scanner.peek_command=="end" || @scanner.check(/(&|\\\\)/) || @scanner.eos?
				end
				r << (td=Td.new) if @scanner.scan(/&/)
			end
			@scanner.scan(RE::WBSLASH)
			row_parsed = true
			hlined = false
		end
	end
	t.hlines = hlines

	t << Tr.new if hlined

	raise ParseError.new("Need \\end{array}.") unless @scanner.peek_command=="end"
	@scanner.scan_command
	raise ParseError.new("Environment mismatched.") unless @scanner.check_block && @scanner[1]=="matrix"
	@scanner.scan_block
	t
end

#env_matrix_row ⇒ Object

# File 'lib/math_ml/latex.rb', line 1096

def env_matrix_row
	r = Tr.new
	until @scanner.check(RE::WBSLASH) || @scanner.peek_command=="end"
		r << push_container(Td.new) do |td|
			td << parse_to_element(true) until @scanner.peek_command=="end" || @scanner.check(/(&|\\\\)/) || @scanner.eos?
		end
	end
end

#initialize ⇒ Object

# File 'lib/math_ml/latex.rb', line 944

def initialize
	add_environment("array", "matrix")

	super
end