Module: MathML::LaTeX::BuiltinGroups
- Included in:
- Parser
- Defined in:
- lib/math_ml/latex.rb,
lib/math_ml/latex.rb
Defined Under Namespace
Classes: CircularReferenceEnvironment
Instance Method Summary
collapse
Instance Method Details
#add_environment(*a) ⇒ Object
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# File 'lib/math_ml/latex.rb', line 838
def add_environment(*a)
@environments = Hash.new unless @environments
if a.size==1 && Hash===a[0]
@environments.merge!(hash)
else
a.each{|i| @environments[i] = false}
end
end
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#grp_begin ⇒ Object
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# File 'lib/math_ml/latex.rb', line 847
def grp_begin
matched = @scanner.matched
begin_pos = @scanner.pos-matched.size
en = @scanner.scan_block ? @scanner[1] : @scanner.scan_any
raise ParseError.new('Environment name not exist.') unless en
macro = @macro.environments(en)
if macro
begin
flg = @expanded_environment.include?(en)
@expanded_environment.push(en)
raise CircularReferenceEnvironment if flg
pos = @scanner.pos
option = (macro.option && @scanner.scan_option) ? @scanner[1] : nil
params = Array.new
(1..macro.num).each do
params << (@scanner.scan_block ? @scanner[1] : @scanner.scan_any)
raise ParseError.new("Need more parameter.") unless params.last
end
body = ""
grpnest = 0
until @scanner.peek_command=="end" && grpnest==0
if @scanner.eos?
@scanner.pos = pos
raise ParseError.new('Matching \end not exist.')
end
com = @scanner.peek_command
grpnest += 1 if @group_begins.has_key?(com)
grpnest -=1 if @group_ends.has_key?(com) && @group_begins[com]
raise ParseError.new("Syntax error.") if grpnest<0
body << @scanner.scan_any(true)
end
@scanner.scan_command
raise ParseError.new("Environment mismatched.", @scanner.matched) unless en==(@scanner.scan_block ? @scanner[1] : @scanner.scan_any)
begin
return parse_into(@macro.expand_environment(en, body, params, option), Array.new)
rescue CircularReferenceEnvironment
if @expanded_environment.size>1
raise
else
@scanner.pos = begin_pos
raise ParseError.new("Circular reference.")
end
rescue ParseError => e
if @expanded_environment.size>1
raise
else
@scanner.pos = begin_pos
raise ParseError.new(%[Error in macro(#{e.message} "#{e.rest.strip}").])
end
end
ensure
@expanded_environment.pop
end
end
raise ParseError.new("Undefined environment.") unless @environments.has_key?(en)
e = @environments[en]
e = en unless e __send__("env_#{e.to_s}")
end
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#grp_left_etc ⇒ Object
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# File 'lib/math_ml/latex.rb', line 911
def grp_left_etc
right =
case @scanner[1]
when "left"
"right"
when "bigg"
"bigg"
end
f = Fenced.new
p = @scanner.pos
o = @scanner.scan_any
raise ParseError.new('Need brace here.') unless o && (o=~RE::BRACES || @delimiters.include?(o[RE::COMMANDS, 1]))
f.open = (o=~RE::BRACES ? o : parse_symbol_command(o[RE::COMMANDS, 1], true))
f << push_container(Row.new) do |r|
until @scanner.peek_command==right
if @scanner.eos?
@scanner.pos = p
raise ParseError.new('Brace not closed.')
end
r << parse_to_element(true)
end
end
@scanner.scan_command c = @scanner.scan_any
raise ParseError.new('Need brace here.') unless c=~RE::BRACES || @delimiters.include?(c[RE::COMMANDS, 1])
f.close = (c=~RE::BRACES ? c : parse_symbol_command(c[RE::COMMANDS, 1], true))
f
end
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#initialize ⇒ Object
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# File 'lib/math_ml/latex.rb', line 829
def initialize
add_group("begin", "end")
add_group("left", "right", :left_etc)
add_group("bigg", "bigg", :left_etc)
@environments = Hash.new
super
end
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