Class: ReVIEW::TOCParser

Inherits:
Object show all
Defined in:
lib/review/tocparser.rb

Defined Under Namespace

Classes: Chapter, List, Node, Paragraph, Section

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.parse(chap) ⇒ Object 



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# File 'lib/review/tocparser.rb', line 20

def TOCParser.parse(chap)
  chap.open {|f|
    stream = Preprocessor::Strip.new(f)
    new.parse(stream, chap.id, chap.path).map {|root|
      root.number = chap.number
      root
    }
  }
end

Instance Method Details

#compile_label(line) ⇒ Object 



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# File 'lib/review/tocparser.rb', line 99

def compile_label(line)
  b = TEXTBuilder.new
  b.bind(ReVIEW::Compiler.new(b), nil, nil)
  b.compile_inline(line)
end

#error!(filename, lineno, msg) ⇒ Object 



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# File 'lib/review/tocparser.rb', line 105

def error!(filename, lineno, msg)
  raise "#{filename}:#{lineno}: #{msg}"
end

#get_label(line) ⇒ Object 



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# File 'lib/review/tocparser.rb', line 94

def get_label(line)
  line = line.strip.sub(/\A=+\s*/, '')
  compile_label(line)
end

#parse(f, id, filename) ⇒ Object 



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# File 'lib/review/tocparser.rb', line 30

def parse(f, id, filename)
  roots = []
  path = []

  while line = f.gets
    line.sub!(/\A\xEF\xBB\xBF/u, '') # remove BOM
    case line
    when /\A\#@/
      ;
    when /\A\s*\z/
      ;
    when /\A(={2,})[\[\s]/
      lev = $1.size
      error! filename, f.lineno, "section level too deep: #{lev}" if lev > 5
      if path.empty?
        # missing chapter label
        path.push Chapter.new(get_label(line), id, filename)
        roots.push path.first
      end
      next if get_label(line) =~ /\A\[\// # ex) "[/column]"
      new = Section.new(lev, get_label(line))
      until path.last.level < new.level
        path.pop
      end
      path.last.add_child new
      path.push new

    when /\A= /
      path.clear
      path.push Chapter.new(get_label(line), id, filename)
      roots.push path.first

    when %r<\A//\w+(?:\[.*?\])*\{\s*\z>
      if path.empty?
        error! filename, f.lineno, 'list found before section label'
      end
      path.last.add_child(list = List.new)
      beg = f.lineno
      list.add line
      while line = f.gets
        break if %r<\A//\}> =~ line
        list.add line
      end
      error! filename, beg, 'unterminated list' unless line

    when %r<\A//\w>
      ;
    else
      #if path.empty?
      #  error! filename, f.lineno, 'text found before section label'
      #end
      next if path.empty?
      path.last.add_child(par = Paragraph.new)
      par.add line
      while line = f.gets
        break if /\A\s*\z/ =~ line
        par.add line
      end
    end
  end

  roots
end