Class: Mathemagical::Util::SimpleLaTeX

Inherits:
Object
  • Object
show all
Includes:
Mathemagical::Util
Defined in:
lib/mathemagical/util.rb

Constant Summary collapse

DEFAULT = 
{
	:delimiter=>"\001",
	:math_env_list=>[
		/\$((?:\\.|[^\\\$])#{Mathemagical::LaTeX::MBEC}*?)\$/m,
		/\\\((#{Mathemagical::LaTeX::MBEC}*?)\\\)/m
	],
	:dmath_env_list=>[
		/\$\$(#{Mathemagical::LaTeX::MBEC}*?)\$\$/m,
		/\\\[(#{Mathemagical::LaTeX::MBEC}*?)\\\]/m
	],
	:escape_list=>[
		/\\(.)/m
	],
	:through_list=>[
	],
	:escape_any=> false,
	:without_parse=>false
}
@@default_latex = 
nil

Constants included from Mathemagical::Util

EQNARRAY_RE, ESCAPES, INVALID_RE, SINGLE_COMMAND_RE

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Mathemagical::Util

collect_regexp, #collect_regexp, #escapeXML, escapeXML

Constructor Details

#initialize(options = {}) ⇒ SimpleLaTeX

Returns a new instance of SimpleLaTeX.



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# File 'lib/mathemagical/util.rb', line 92

def initialize(options = {})
	@params = DEFAULT.merge(options)
	@params[:parser] = Mathemagical::LaTeX::Parser.new unless @params[:parser] || @params[:without_parse]

	@params[:math_envs] = collect_regexp(@params[:math_env_list])
	@params[:dmath_envs] = collect_regexp(@params[:dmath_env_list])
	@params[:escapes] = collect_regexp(@params[:escape_list])
	@params[:throughs] = collect_regexp(@params[:through_list])
	reset_encode_proc
	reset_rescue_proc
	reset_decode_proc
	reset_unencode_proc
end

Class Method Details

.decode(src, data) ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 324

def self.decode(src, data)
	@@default_latex.decode(src, data)
end

.encode(src) ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 319

def self.encode(src)
	@@default_latex = self.new unless @@default_latex
	@@default_latex.encode(src)
end

Instance Method Details

#decode(encoded, data, without_parsed = false, &proc) ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 234

def decode(encoded, data, without_parsed = false, &proc)
	return nil if encoded==nil
	proc = @decode_proc unless proc
	encoded.gsub(/#{Regexp.escape(@params[:delimiter])}([demu])(\d+)#{Regexp.escape(@params[:delimiter])}/) do
		i = $2.to_i
		t, d, s =
			case $1
			when "d"
				[:dmath, without_parsed ? escapeXML(data.dsrc_list[i], true) : data.dmath_list[i], data.dsrc_list[i]]
			when "e"
				[:escape, data.escape_list[i], data.esrc_list[i]]
			when "m"
				[:math, without_parsed ? escapeXML(data.msrc_list[i], true) : data.math_list[i], data.msrc_list[i]]
			when "u"
				[:user, data.user_list[i], data.usrc_list[i]]
			end
		if proc
			proc.call(d, :type=>t, :index=>i, :src=>s) || d
		else
			d
		end
	end
end

#decode_partial(type, encoded, data, &proc) ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 258

def decode_partial(type, encoded, data, &proc)
	return nil if encoded==nil
	head =
		case type
		when :math
			"m"
		when :dmath
			"d"
		when :escape
			"e"
		when :user
			"u"
		else
			return
		end
	encoded.gsub(/#{Regexp.escape(@params[:delimiter])}#{head}(\d+)#{Regexp.escape(@params[:delimiter])}/) do
		i = $1.to_i
		t, d, s =
			case head
			when "d"
				[:dmath, data.dmath_list[i], data.dsrc_list[i]]
			when "e"
				[:escape, data.escape_list[i], data.esrc_list[i]]
			when "m"
				[:math, data.math_list[i], data.msrc_list[i]]
			when "u"
				[:user, data.user_list[i], data.usrc_list[i]]
			end
		if proc
			proc.call(d, :type=>t, :index=>i, :src=>s) || "#{@params[:delimiter]}#{head}#{i}#{@params[:delimiter]}"
		else
			d
		end
	end
end

#encode(src, *proc_re, &proc) ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 140

def encode(src, *proc_re, &proc)
	if proc_re.size>0 && proc_re[0].is_a?(MathData)
		data = proc_re.shift
	else
		data = MathData.new
	end

	proc_re = proc_re.size==0 ? @encode_proc_re : collect_regexp(proc_re)
	proc = @encode_proc unless proc

	s = StringScanner.new(src)
	encoded = ""

	until s.eos?
		if s.scan(/(.*?)(((((#{@params[:throughs]})|#{@params[:dmath_envs]})|#{@params[:math_envs]})|#{proc_re})|#{@params[:escapes]})/m)
			encoded << s[1]
			case
			when s[6]
				encoded << s[6]
			when s[5], s[4]
				env_src = s[5] || s[4]
				if @params[:dmath_envs]=~env_src
					encoded << "#{@params[:delimiter]}d#{data.dsrc_list.size}#{@params[:delimiter]}"
					data.dsrc_list << env_src
				else
					encoded << "#{@params[:delimiter]}m#{data.msrc_list.size}#{@params[:delimiter]}"
					data.msrc_list << env_src
				end
			when s[3]
				size = s[3].size
				s.pos = left = s.pos-size
				if r=proc.call(s)
					right = s.pos
					encoded << "#{@params[:delimiter]}u#{data.user_list.size}#{@params[:delimiter]}"
					data.user_list << r
					data.usrc_list << s.string[left...right]
				else
					encoded << s.peek(size)
					s.pos = s.pos+size
				end
			when s[2]
				encoded << "#{@params[:delimiter]}e#{data.escape_list.size}#{@params[:delimiter]}"
				@params[:escapes]=~s[2]
				data.esrc_list << s[2]
				data.escape_list << escapeXML($+, true)
			end
		else
			encoded << s.rest
			s.terminate
		end
	end

	parse(data, @params[:parser]) unless @params[:without_parse]

	return encoded, data
end

#error_to_html(e) ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 197

def error_to_html(e)
	"<br />\n#{escapeXML(e.message)}<br />\n<code>#{escapeXML(e.done).gsub(/\n/, "<br />\n")}<strong>#{escapeXML(e.rest).gsub(/\n/, "<br />\n")}</strong></code><br />"
end

#latex_parser ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 201

def latex_parser
	@params[:parser] = Mathemagical::LaTeX::Parser.new unless @params[:parser]
	@params[:parser]
end

#parse(data, parser = nil) ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 206

def parse(data, parser=nil)
	parser = latex_parser unless parser
	(data.math_list.size...data.msrc_list.size).each do |i|
		begin
			@params[:math_envs]=~data.msrc_list[i]
			data.math_list[i] = parser.parse($+)
		rescue Mathemagical::LaTeX::ParseError => e
			if @rescue_proc
				data.math_list[i] = @rescue_proc.call(e)
			else
				data.math_list[i] = error_to_html(e)
			end
		end
	end
	(data.dmath_list.size...data.dsrc_list.size).each do |i|
		begin
			@params[:dmath_envs]=~data.dsrc_list[i]
			data.dmath_list[i] = parser.parse($+, true)
		rescue Mathemagical::LaTeX::ParseError => e
			if @rescue_proc
				data.dmath_list[i] = @rescue_proc.call(e)
			else
				data.dmath_list[i] = error_to_html(e)
			end
		end
	end
end

#parse_eqnarray(src, parser = nil) ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 328

def parse_eqnarray(src, parser=nil)
	src = "\\begin{array}{ccc}#{src}\\end{array}"
	parser = latex_parser unless parser
	begin
		parser.parse(src, true)
	rescue Mathemagical::LaTeX::ParseError => e
		e = Mathemagical::LaTeX::ParseError.new(e.message,
			e.rest.sub(/\\end\{array\}\z/, '\end{eqnarray}'),
			e.done.sub(/\A\\begin\{array\}\{ccc\}/, '\begin{eqnarray}'))
		@rescue_proc ? @rescue_proc.call(e) : error_to_html(e)
	end
end

#parse_single_command(src, parser = nil) ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 341

def parse_single_command(src, parser=nil)
	s = src[SINGLE_COMMAND_RE, 1]
	parser = latex_parser unless parser
	begin
		parser.parse(s)
	rescue Mathemagical::LaTeX::ParseError => e
		src[SINGLE_COMMAND_RE, 2]
	end
end

#reset_decode_proc ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 124

def reset_decode_proc
	@decode_proc = nil
end

#reset_encode_proc ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 106

def reset_encode_proc
	@encode_proc_re = INVALID_RE
	@encode_proc = nil
end

#reset_rescue_proc ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 116

def reset_rescue_proc
	@rescue_proc = nil
end

#reset_unencode_proc ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 136

def reset_unencode_proc
	@unencode_proc = nil
end

#set_decode_proc(&proc) ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 128

def set_decode_proc(&proc)
	@decode_proc = proc
end

#set_encode_proc(*re, &proc) ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 111

def set_encode_proc(*re, &proc)
	@encode_proc_re = collect_regexp(re)
	@encode_proc = proc
end

#set_rescue_proc(&proc) ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 120

def set_rescue_proc(&proc)
	@rescue_proc = proc
end

#set_unencode_proc(&proc) ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 132

def set_unencode_proc(&proc)
	@unencode_proc = proc
end

#unencode(encoded, data, without_escape = false, &proc) ⇒ Object 



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# File 'lib/mathemagical/util.rb', line 294

def unencode(encoded, data, without_escape=false, &proc)
	return nil if encoded==nil
	proc = @unencode_proc unless proc
	encoded.gsub(/#{Regexp.escape(@params[:delimiter])}([demu])(\d+)#{Regexp.escape(@params[:delimiter])}/) do
		i = $2.to_i
		t, s =
			case $1
			when "d"
				[:dmath, data.dsrc_list[i]]
			when "e"
				[:escape, data.esrc_list[i]]
			when "m"
				[:math, data.msrc_list[i]]
			when "u"
				[:user, data.usrc_list[i]]
			end
		s = escapeXML(s, true) unless without_escape
		if proc
			proc.call(s, :type=>t, :index=>i) || s
		else
			s
		end
	end
end