Class: TracWiki::Env

Inherits:
Object
  • Object
show all
Defined in:
lib/trac-wiki/env.rb

Instance Method Summary collapse

Constructor Details

#initialize(parser, env = {}) ⇒ Env

Returns a new instance of Env.



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# File 'lib/trac-wiki/env.rb', line 5

def initialize(parser, env = {})
  @parser = parser
  @env = env
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/trac-wiki/env.rb', line 187

def [](key)
  at(key)
end

#[]=(key, val) ⇒ Object 



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# File 'lib/trac-wiki/env.rb', line 191

def []=(key,val)
  #print "set #{key} to #{val}\n"
  atput(key,val)
end

#arg(idx) ⇒ Object 



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# File 'lib/trac-wiki/env.rb', line 115

def arg(idx)
  @env[:cmd_args][idx] || ''
end

#at(key, default = nil, to_str = true) ⇒ Object 



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# File 'lib/trac-wiki/env.rb', line 134

def at(key, default = nil, to_str = true)
  #print "at(#{key}), env:"
  #pp @env
  return @env[key] || default if key.is_a? Symbol
  prepare_y if key =~ /^y\./
  key = "argv.#{key}" if key =~ /^\d+$/
  #print "key: #{key}\n"
  cur = @env
  key.split(/\./).each do |subkey|
    subkey = at($1, '') if subkey =~ /\A\$(.*)/
    #print "at:subkey: #{subkey}\n"
    if cur.is_a? Hash
      cur = cur[subkey]
    elsif cur.is_a? Array
      cur = cur[subkey.to_i]
    else
      #print "at(#{key})->: default"
      return default
    end
    #print "at(#{key}) -> default\n" if cur.nil?
    return default if cur.nil?
  end
  #print "at(#{key})->#{cur}\n"
  to_str ? cur.to_s : cur
end

#atput(key, val = nil) ⇒ Object 



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# File 'lib/trac-wiki/env.rb', line 159

def atput(key, val = nil)
  #print "atput: #{key}, #{val} env:"
  #pp @env
  cur = @env
  if val.is_a? Symbol
    @env[key] = val
    return
  end
  keys = key.split(/\./)
  lastkey = keys.pop
  keys.each do |subkey|
    if cur.is_a? Hash
      cur = cur[subkey]
    elsif cur.is_a? Array
      cur = cur[subkey.to_i]
    else
      return
    end
  end
  if  cur.is_a? Hash
    cur[lastkey] = val
  elsif cur.is_a? Array
    cur[lastkey.to_i] = val
  end
  #print "atput:env:"
  #pp @env
end

#do_macro_arg_to_env(args) ⇒ Object 



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# File 'lib/trac-wiki/env.rb', line 229

def do_macro_arg_to_env(args)
  env  = {}
  @env.each do  |k,v|
    env[k] = v if k != :depth && k != 'arg' && k!='argv'
  end
  env[:depth] = (@env[:depth]||0)+1
  env['arg'] = args.join('|')
  env['argv'] = {}

  idx = 1
  args.each do |arg|
    if arg =~ /\A\s*(\w+)\s*=\s*(.*)/m
      env[$1] = $2
    else
      env['argv'][idx.to_s] = arg
      idx+=1
    end
  end
  return Env.new(@parser, env)
end

#do_macro_cmd(macro_name, args) ⇒ Object

calls {!cmd} (if exists r: result of {!cmd}



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# File 'lib/trac-wiki/env.rb', line 104

def do_macro_cmd(macro_name, args)
  return '|' if macro_name == '!'
  if @parser.macro_commands.key?(macro_name)
    @env[:cmd_args] =  args
    @env[:cmd_arg0] =  macro_name
    #print "mac: #{macro_name} env:" ; pp (@env)
    ret = @parser.macro_commands[macro_name].call(self)
    return ret
  end
  "UCMD(#{macro_name}|#{@env['arg']})"
end

#do_macro_templ(macro_name, args) ⇒ Object

expand macro ‘macro_name` with `args` afer expansion all {macros} will be expanded recursively r: expanded string



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# File 'lib/trac-wiki/env.rb', line 199

def do_macro_templ(macro_name, args)
  return "!{{toc}}" if macro_name == 'toc'
  return args.join('|').strip  if macro_name == '#echo'
  return '' if macro_name == '#'

  env = do_macro_arg_to_env(args)

  #print "templ:#{macro_name}env:"
  #pp(args)

  if ! @parser.template_handler.nil?
    str = @parser.template_handler.call(macro_name, env)
    if !str.nil?
      #print "dep:#{env[:depth]}(#{macro_name}, #{str})\n"
      if env[:depth] > 32
         return "TOO_DEEP_RECURSION(`#{str}`)\n"
         #return "TOO_DEEP_RECURSION"
      end
      # FIXME: melo by nahlasit jestli to chce expandovat | wiki expadnovat |raw html
      #print "temp(#{macro_name}) --> : #{str}\n"
      #print "bf ex: [#{str}]\n"
      str = env.expand(str)
      #print "af ex: [#{str}]\n"
      return str
    end
  end
  #print "UMACRO(#{macro_name}|#{args})\n"
  "UMACRO(#{macro_name}|#{args.join('|')})"
end

#do_macro_var(var_name, args) ⇒ Object 



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# File 'lib/trac-wiki/env.rb', line 250

def do_macro_var(var_name, args)
  #print "var(#{var_name})env:"
  #pp(@env)
  ret = at(var_name, nil)
  return ret if !ret.nil?
  return args.join('|')  if args.size > 0
  return ''
  "UVAR(#{var_name}|#{@env['arg']})"
end

#expand(str) ⇒ Object 



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# File 'lib/trac-wiki/env.rb', line 268

def expand(str)
  ret = ''
  return '' if str.nil?
  while str =~ TracWiki::Parser::MACRO_BEG_INSIDE_REX
      prefix, macro_name2, str = $1, $2, $'
      ret << prefix
      # FIXME if macro_name2 =~ /^!/
      mac_out, str, lines, offset = parse_macro_all(macro_name2, str, nil)
      ret << mac_out
      #print "Too long macro expadion" if ret.size > 1_000_000
      raise TooLongException if ret.size > 1_000_000
  end
  #print "text: #{text.nil?}\n"
  #print "ret: #{ret.nil?}\n"
  ret += str
  return ret.gsub(/\\\r?\n\s*/, '')
end

#expand_arg(idx) ⇒ Object

template expand



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# File 'lib/trac-wiki/env.rb', line 261

def expand_arg(idx)
  expand(@env[:cmd_args][idx])
end

#parse_balanced(str) ⇒ Object

r: [args], rest-of-str, num-of-lines, offset-last-line



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# File 'lib/trac-wiki/env.rb', line 72

def parse_balanced(str)
  str.sub!(/\A\s*\|?/, '')
  offset = $&.size
  return [], $', 0, 2 if str =~ /\A}}/
  #print "_parse_macro_cmd: #{macro_name}, str#{str}\n"
  dep = 0
  lines = 0
  args = ['']
  while str =~ /{{|}}|\n|\|/
    prefix, match, str  = $`, $&, $'
    offset += prefix.size + match.size
    #raise "offset is nil" if offset.nil? 
    args[-1] += prefix
    if match == '{{'
      dep += 1
    elsif match == '}}'
      dep -= 1
      return args, str, lines, offset if dep < 0
    elsif match == "\n" 
      lines += 1
      offset = 0
    elsif match == '|' && dep == 0
      args.push('')
      next
    end
    args[-1]  += $&
  end
  raise "eol in parsing macro params"
end

#parse_macro_all(macro_name, str, macro_name_size = nil) ⇒ Object

r: expanded-macro, rest-of-str, lines, offset-in-line



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# File 'lib/trac-wiki/env.rb', line 11

def parse_macro_all(macro_name, str, macro_name_size = nil)
  str_size = str.size
  args, rest, lines, offset = parse_balanced(str)
  atput('maclen', str_size - rest.size + macro_name_size) if ! macro_name_size.nil?
  if macro_name =~ /\A!/
     # {{!cmd}}
     mac_out = parse_macro_cmd(macro_name, args)
  else
     # {{$cmd}},  {{template}}, ...
     mac_out = parse_macro_vartempl(macro_name, args)
  end
  return mac_out || '', rest, lines, offset
end

#parse_macro_cmd(macro_name, args) ⇒ Object

parse to next }} (with balanced {..}) like parse_macro_vartempl but not expand content r: [expansion, rest_of_str, count_of_consumed_lines]



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# File 'lib/trac-wiki/env.rb', line 67

def parse_macro_cmd(macro_name, args)
   return do_macro_cmd(macro_name, args)
end

#parse_macro_vartempl(macro_name, args) ⇒ Object

read to args to }} (while balancing and }) ret: (arg, rest, lines) mac_out – string to }} (macros inside expanded) rest – str aftrer }} lines – howmany n eaten from str (from begining to }})



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# File 'lib/trac-wiki/env.rb', line 30

def parse_macro_vartempl(macro_name, args)
  args.map! { |arg| expand(arg) }
  return do_macro_var($1, args) if macro_name =~ /^\$(.*)/
  return do_macro_templ(macro_name, args)
end

#pp_env ⇒ Object 



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# File 'lib/trac-wiki/env.rb', line 265

def pp_env
  pp(@env)
end

#prepare_y ⇒ Object 



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# File 'lib/trac-wiki/env.rb', line 119

def prepare_y
  #print "prepare_y\n"
  return if @env.key? 'y'
  arg = @env['arg']
  return if arg.nil?
  begin
    @env['y'] = YAML.load(arg)
    #print "y"
    #pp @env['y']
  rescue
    @env['y'] = nil
    #print "y:nil\n"
  end
end