Module: RBeautify

Defined in:
ext/ae-editor/lib/rbeautify.rb

Constant Summary collapse

TabStr =

user-customizable values

" "
TabSize = 
2
IndentExp =

indent regexp tests

[
   /^module\b/,
   /^class\b/,
   /^if\b/,
   /(=\s*|^)until\b/,
   /(=\s*|^)for\b/,
   /^unless\b/,
   /(=\s*|^)while\b/,
   /(=\s*|^)begin\b/,
   /(^| )case\b/,
   /\bthen\b/,
   /^rescue\b/,
   /^def\b/,
   /\bdo\b/,
   /^else\b/,
   /^elsif\b/,
   /^ensure\b/,
   /\bwhen\b/,
   /\{[^\}]*$/,
   /\[[^\]]*$/
]
OutdentExp =

outdent regexp tests

[
   /^rescue\b/,
   /^ensure\b/,
   /^elsif\b/,
   /^end\b/,
   /^else\b/,
   /\bwhen\b/,
   /^[^\{]*\}/,
   /^[^\[]*\]/
]

Class Method Summary collapse

Class Method Details

.beautify_file(path) ⇒ Object

beautify_string



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# File 'ext/ae-editor/lib/rbeautify.rb', line 186

def RBeautify.beautify_file(path)
   error = false
   if(path == '-') # stdin source
      source = STDIN.read
      dest,error = beautify_string(source,"stdin")
      print dest
   else # named file source
      source = File.read(path)
      dest,error = beautify_string(source,path)
      if(source != dest)
         # make a backup copy
         File.open(path + "~","w") { |f| f.write(source) }
         # overwrite the original
         File.open(path,"w") { |f| f.write(dest) }
      end
   end
   return error
end

.beautify_string(source, path = "") ⇒ Object 



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# File 'ext/ae-editor/lib/rbeautify.rb', line 81

def RBeautify.beautify_string(source, path = "")
   comment_block = false
   in_here_doc = false
   here_doc_term = ""
   program_end = false
   multiLine_array = []
   multiLine_str = ""
   tab = 0
   output = []
   source.each do |line|
      line.chomp!
      if(!program_end)
         # detect program end mark
         if(line =~ /^__END__$/)
            program_end = true
         else
            # combine continuing lines
            if(!(line =~ /^\s*#/) && line =~ /[^\\]\\\s*$/)
               multiLine_array.push line
               multiLine_str += line.sub(/^(.*)\\\s*$/,"\\1")
               next
            end

            # add final line
            if(multiLine_str.length > 0)
               multiLine_array.push line
               multiLine_str += line.sub(/^(.*)\\\s*$/,"\\1")
            end

            tline = ((multiLine_str.length > 0)?multiLine_str:line).strip
            if(tline =~ /^=begin/)
               comment_block = true
            end
            if(in_here_doc)
               in_here_doc = false if tline =~ %r{\s*#{here_doc_term}\s*}
            else # not in here_doc
               if tline =~ %r{=\s*<<}
                  here_doc_term = tline.sub(%r{.*=\s*<<-?\s*([_|\w]+).*},"\\1")
                  in_here_doc = here_doc_term.size > 0
               end
            end
         end
      end
      if(comment_block || program_end || in_here_doc)
         # add the line unchanged
         output << line
      else
         comment_line = (tline =~ /^#/)
         if(!comment_line)
            # throw out sequences that will
            # only sow confusion
            while tline.gsub!(/\{[^\{]*?\}/,"")
            end
            while tline.gsub!(/\[[^\[]*?\]/,"")
            end
            while tline.gsub!(/'.*?'/,"")
            end
            while tline.gsub!(/".*?"/,"")
            end
            while tline.gsub!(/\`.*?\`/,"")
            end
            while tline.gsub!(/\([^\(]*?\)/,"")
            end
            while tline.gsub!(/\/.*?\//,"")
            end
            while tline.gsub!(/%r(.).*?\1/,"")
            end
            # delete end-of-line comments
            tline.sub!(/#[^\"]+$/,"")
            # convert quotes
            tline.gsub!(/\\\"/,"'")
            OutdentExp.each do |re|
               if(tline =~ re)
                  tab -= 1
                  break
               end
            end
         end
         if (multiLine_array.length > 0)
            multiLine_array.each do |ml|
               output << rb_add_line(ml,tab)
            end
            multiLine_array.clear
            multiLine_str = ""
         else
            output << rb_add_line(line,tab)
         end
         if(!comment_line)
            IndentExp.each do |re|
               if(tline =~ re && !(tline =~ /\s+end\s*$/))
                  tab += 1
                  break
               end
            end
         end
      end
      if(tline =~ /^=end/)
         comment_block = false
      end
   end
   error = (tab != 0)
   STDERR.puts "Error: indent/outdent mismatch: #{tab}." if error
   return output.join("\n") + "\n",error
end

.main ⇒ Object

beautify_file



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# File 'ext/ae-editor/lib/rbeautify.rb', line 205

def RBeautify.main
   error = false
   if(!ARGV[0])
      STDERR.puts "usage: Ruby filenames or \"-\" for stdin."
      exit 0
   end
   ARGV.each do |path|
      error = (beautify_file(path))?true:error
   end
   error = (error)?1:0
   exit error
end

.rb_add_line(line, tab) ⇒ Object 



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# File 'ext/ae-editor/lib/rbeautify.rb', line 75

def RBeautify.rb_add_line(line,tab)
   line.strip!
   line = rb_make_tab(tab) + line if line.length > 0
   return line
end

.rb_make_tab(tab) ⇒ Object 



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# File 'ext/ae-editor/lib/rbeautify.rb', line 71

def RBeautify.rb_make_tab(tab)
   return (tab < 0)?"":TabStr * TabSize * tab
end