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

.chapter_node(chap) ⇒ Object 



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# File 'lib/review/tocparser.rb', line 25

def self.chapter_node(chap)
  toc = self.parse(chap)
  $stderr.puts "warning: chapter #{toc.join} contains more than 1 chapter" unless toc.size == 1
  toc.first
end

.parse(chap) ⇒ Object 



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# File 'lib/review/tocparser.rb', line 17

def self.parse(chap)
  stream = StringIO.new(chap.content, 'rt:BOM|utf-8')
  new.parse(stream, chap).map do |root|
    root.number = chap.number
    root
  end
end

Instance Method Details

#compile_label(line) ⇒ Object 



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# File 'lib/review/tocparser.rb', line 107

def compile_label(line)
  b = ReVIEW::TEXTBuilder.new
  dummy_book = ReVIEW::Book::Base.load
  dummy_chapter = ReVIEW::Book::Chapter.new(dummy_book, 1, '-', nil, StringIO.new)
  if @chap
    dummy_chapter = @chap
  end
  dummy_loc = Location.new('', StringIO.new)
  b.bind(ReVIEW::Compiler.new(b), dummy_chapter, dummy_loc)
  b.compile_inline(line)
end

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



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# File 'lib/review/tocparser.rb', line 119

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

#get_label(line) ⇒ Object 



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# File 'lib/review/tocparser.rb', line 102

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

#parse(f, chap) ⇒ Object 



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# File 'lib/review/tocparser.rb', line 31

def parse(f, chap)
  roots = [] # list of chapters
  node_stack = []
  @chap = chap
  filename = chap.path
  while line = f.gets
    case line
    when /\A\#@/
      # do nothing
      next
    when /\A\s*\z/
      # do nothing
      next
    when /\A(={2,})[\[\s\{]/
      lev = $1.size
      if lev > 5
        error!(filename, f.lineno, "section level too deep: #{lev}")
      end
      label = get_label(line)
      if node_stack.empty?
        # missing chapter label
        dummy_chapter = Chapter.new(label, chap)
        node_stack.push(dummy_chapter)
        roots.push(dummy_chapter)
      end
      next if label.start_with?('[/') # ex) "[/column]"
      sec = Section.new(lev, label.gsub(/\A\{.*?\}\s?/, ''))
      node_stack.pop until node_stack.last.level < sec.level
      node_stack.last.add_child(sec)
      node_stack.push(sec)

    when /\A=[^=]/
      label = get_label(line)
      node_stack.clear
      new_chapter = Chapter.new(label, chap)
      node_stack.push(new_chapter)
      roots.push(new_chapter)

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

    when %r{\A//\w}
      # do nothing
      next
    else
      # if node_stack.empty?
      #   error! filename, f.lineno, 'text found before section label'
      # end
      next if node_stack.empty?
      node_stack.last.add_child(par = Paragraph.new(chap))
      par.add(line)
      while line = f.gets
        break if /\A\s*\z/ =~ line
        par.add(line)
      end
    end
  end

  roots
end