Class: MapReader

Inherits:
Object
  • Object
show all
Includes:
MapUnquote
Defined in:
lib/IFMapper/MapReader.rb

Overview

A generic abstract class for reading a map from some file format.

Map readers are expected to parse their file formats and call:

new_room new_door new_obj

with @tag and @name defined.

These functions create arrays of temporary Map* classes (like MapRoom) that represent the room and their connections.

Later on, the create() function is invoked to actually create those rooms as actual FXRooms and similar. The reason this is done this way is because in order to position FXRooms around, we need to previously know the location of all rooms and their exits.

Defined Under Namespace

Classes: MapDoor, MapError, MapObject, MapOneWay, MapRoom, MapSpecialExit, ParseError

Constant Summary collapse

SEP = 
':'
DIRLIST =

Direction list in order of positioning preference.

[ 0, 4, 2, 6, 1, 3, 5, 7 ]
@@debug = 
nil

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from MapUnquote

#unquote

Constructor Details

#initialize(file, map = Map.new('Read Map')) ⇒ MapReader

Returns a new instance of MapReader.



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# File 'lib/IFMapper/MapReader.rb', line 868

def initialize(file, map = Map.new('Read Map'))
  @map = map

  @doors   = []
  @functions = []
  @tags    = {}
  @rooms   = []
  @objects = []

  @include_dirs = [File.dirname(file)]
  set_include_dirs

  if @map.kind_of?(FXMap)
    return unless properties
  end

  create_map(file)

  debug "Done creating #{file}"
  
  @tags      = nil   # save some memory by clearing the tag list
  @objects   = nil
  @functions = nil
  @doors     = nil
  @rooms     = nil 

  if @map.kind_of?(FXMap)
    @map.filename   = file.sub(/\.t$/i, '.map')
    @map.options['Location Description'] = true
    @map.window.show
  end
end

Instance Attribute Details

#doors ⇒ Object (readonly)

Returns the value of attribute doors.



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# File 'lib/IFMapper/MapReader.rb', line 220

def doors
  @doors
end

#functions ⇒ Object (readonly)

Returns the value of attribute functions.



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# File 'lib/IFMapper/MapReader.rb', line 220

def functions
  @functions
end

#include_dirs ⇒ Object (readonly)

Returns the value of attribute include_dirs.



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# File 'lib/IFMapper/MapReader.rb', line 221

def include_dirs
  @include_dirs
end

#map ⇒ Object (readonly)

Returns the value of attribute map.



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# File 'lib/IFMapper/MapReader.rb', line 220

def map
  @map
end

#rooms ⇒ Object (readonly)

Returns the value of attribute rooms.



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# File 'lib/IFMapper/MapReader.rb', line 220

def rooms
  @rooms
end

#tags ⇒ Object (readonly)

Returns the value of attribute tags.



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# File 'lib/IFMapper/MapReader.rb', line 220

def tags
  @tags
end

Instance Method Details

#best_dir(r, dirA) ⇒ Object 



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# File 'lib/IFMapper/MapReader.rb', line 269

def best_dir(r, dirA)
  start = (dirA + 4) % 8

  dirs = [
    start,
    (start - 1) % 8,
    (start + 1) % 8,
    (start - 2) % 8,
    (start + 2) % 8,
    (start - 3) % 8,
    (start + 3) % 8,
    dirA
  ]

  dirs.each { |d|
    return d if not r.exits[d]
  }

  return nil
end

#choose_dir(a, b, go = nil, exitB = nil) ⇒ Object

Choose a direction to represent up/down/in/out.



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# File 'lib/IFMapper/MapReader.rb', line 495

def choose_dir(a, b, go = nil, exitB = nil)
  if go
    rgo = go % 2 == 0? go - 1 : go + 1
    # First, check if room already has exit moving towards other room
    a.exits.each_with_index { |e, idx|
	next if not e
	roomA = e.roomA
	roomB = e.roomB
	if roomA == a and roomB == b
 e.exitAtext = go
 return idx
	elsif roomB == a and roomA == b
 e.exitBtext = go
 return idx
	end
    }
  end

  # We prefer directions that travel less... so we need to figure
  # out where we start from...
  if b
    x = b.x
    y = b.y
  else
    x = a.x
    y = a.y
  end
  if exitB
    dx, dy = Room::DIR_TO_VECTOR[exitB]
    x += dx
    y += dy
  end

  # No such luck... Pick a direction.
  best = nil
  bestscore = nil

  DIRLIST.each { |dir|
    # We prefer straight directions to diagonal ones
    inc   = dir % 2 == 1 ? 100 : 140
    score = 1000
    # We prefer directions where both that dir and the opposite side
    # are empty.
    if (not a[dir]) or a[dir].stub?
	score += inc
	score += 4 if a[dir] #attaching to stubs is better
    end
#       rdir  = (dir + 4) % 8
#       score += 1   unless a[rdir]

    # Measure distance for that exit, we prefer shorter
    # paths
    dx, dy = Room::DIR_TO_VECTOR[dir]
    dx = (a.x + dx) - x
    dy = (a.y + dy) - y
    d = dx * dx + dy * dy
    score -= d
    next if bestscore and score <= bestscore
    bestscore = score
    best = dir
  }

  if not bestscore
    raise "No free exit for choose_dir"
  end

  return best
end

#compact ⇒ Object

Try to move rooms around to make map smaller.



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# File 'lib/IFMapper/MapReader.rb', line 778

def compact
  # First, verify all one-exit rooms lie next to its opposite room.
  sect  = @map.sections[@map.section]
  rooms = sect.rooms.find_all { |r| r.num_exits == 1 }

  rooms.each { |a|
    c = a.exits.find { |e| e != nil }
    b = c.opposite(a)

    dx = (a.x - b.x).abs
    dy = (a.y - b.y).abs
    next if dx <= 1 and dy <= 1

    x, y = [b.x, b.y]
    dirB = b.exits.index(c)

    dx, dy = Room::DIR_TO_VECTOR[dirB]
    x += dx
    y += dy

    dirA = a.exits.index(c)
    dx, dy = Room::DIR_TO_VECTOR[dirA]
    # Check if exits are complementary.  If not, we need to move room
    # again.
    if x + dx != b.x or y + dy != b.y
	x -= dx
	y -= dy
    end
    next if x == a.x and y == a.y

    # Place room here.  Check if filled.
    if sect.free?(x, y)
	a.x, a.y = x, y
    else
	if dx != 0
 dy = 0
	end
	sect.shift(x, y, -dx, -dy)
	a.x, a.y = x, y
    end
  }
end

#create ⇒ Object

Create all the stuff we found



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# File 'lib/IFMapper/MapReader.rb', line 824

def create
  @rooms = @rooms.sort_by { |r| r.num_exits }
  @rooms.reverse!

  @rooms.each { |r| 
    @tabs = 0
    min, max = @map.sections[@map.section].min_max_rooms
    create_room(r, max[0] + 2, 0)
  }
  @rooms = []

  @objects.delete_if { |obj| obj.scenery }

  # Add objects to rooms
  @objects.each { |obj|
    obj.location.each { |loc|
	r = @tags[loc]
	while r and not r.kind_of?(Room)
 r = @tags[ r.location[0] ]
	end
	next unless r
	r.objects << obj.name + "\n"
    }
  }
end

#create_map(file) ⇒ Object 



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# File 'lib/IFMapper/MapReader.rb', line 850

def create_map(file)
  read_file(file)

  puts "Rooms: #{@rooms.size}"
  puts "Doors: #{@doors.size}"
  puts "Objects: #{@objects.size}"

  begin
    resolve_exits
    create
    compact
  rescue => e
    puts e
    puts e.backtrace
    raise
  end
end

#create_room(r, x, y, dx = 2, dy = 0) ⇒ Object 



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# File 'lib/IFMapper/MapReader.rb', line 616

def create_room(r, x, y, dx = 2, dy = 0)
  return @tags[r.tag] if @tags[r.tag].kind_of?(Room)

  debug "+++ CREATE ROOM #{r.name} (#{x},#{y}) TAG:#{r.tag}"
  from, = make_room(r, x, y, dx, dy)

  r.exits[0,8].each_with_index { |to, exit|
    next unless to

    debug "#{r.name} EXIT:#{exit} points to #{to}"

    go = c = nil

    if to.kind_of?(MapOneWay)
	dx, dy = Room::DIR_TO_VECTOR[exit]
	x = from.x + dx
	y = from.y + dy
	@tabs += 1
	create_room(to.room, x, y, dx, dy)
	@tabs -= 1
	next
    elsif to.kind_of?(MapSpecialExit)
	go = to.go
	to = to.to
    end

    b = to


    dir  = exit
    type = 0

    # If exit leads to an enterable object, find out where does that
    # enterable object lead to.
    if to.kind_of?(MapObject)
	rooms = to.enterable
	rooms.each { |room|
 next if room == r
 to = b = @tags[room]
 break
	}
	# Skip it if we are still an object.  This means we are just
	# a container, like the phone booth in the Fate game demo.
	next if to.kind_of?(MapObject)
    end

    odir = nil
    if b.kind_of?(MapRoom)
	odir = b.exits.rindex(r.tag)
	if not odir
 b.exits[0,8].each_with_index { |e, idx|
   next if not e
   if (e.kind_of?(MapOneWay) and e.room == r) or
(e.kind_of?(MapSpecialExit) and e.to == r)
     odir = idx
     break
   end
 }
	end
    elsif b.kind_of?(MapDoor)
	t = b.location.find { |t| t != r.tag }
	other = @rooms.find { |x| x.tag == t }
	# other = @tags[t]
	if other
 other.exits.each_with_index { |d, idx|
   next if not d
   if d == b or d == r.tag or 
(d.kind_of?(MapOneWay) and d.room == r) or
(d.kind_of?(MapSpecialExit) and (d.to == b or d == r.tag))
     odir = idx
     break
   end
 }
	end
    end 
    odir = (dir + 4) % 8 if not odir

    if to.kind_of?(MapRoom) or to.kind_of?(MapDoor)
	dx, dy = Room::DIR_TO_VECTOR[dir]
	x = from.x + dx
	y = from.y + dy
	@tabs += 1
	to, type = get_exit(r, from, to, x, y, dx, dy)
	@tabs -= 1
	next if not to
    end


#       b = @rooms.find { |r2| r2.tag == tag }
#       odir = nil
#       odir = b.exits.rindex(r.tag) if b
#       odir = (dir + 4) % 8 if not odir

    if from[dir]
	c = from[dir]
	if to.exits.rindex(c) and c.roomB == from
 debug "LINK TRAVELLED BOTH"
 c.dir = Connection::BOTH
 c.exitBtext = go if go
 next
	else
 debug "#{exit} FROM #{from}->#{to} BLOCKED DIR: #{dir}"
 shift_link(from, dir)
	end
    end

    # Check we don't have a connection already
    if to[odir]
	c = to[odir]

	# We need to change odir to something else
	rgo = 0
	if go
 rgo = go % 2 == 0? go - 1 : go + 1
	end

	# First, check if we have a dangling one-way link going to->from
	# If we do, we use it.
	c = oneway_link?(from, to)
	if not c
 odir = choose_dir(to, from, rgo, dir)
	else
 debug "FOUND LINK #{c} -- filling it."
 idx = from.exits.index(c)
 from[idx] = nil
 from[dir] = c
 c.dir = Connection::BOTH
 c.exitBtext = go if go
	end
    else
	debug "to[odir] empty."
	# First, check if we have a dangling one-way link going to->from
	# If we do, we use it.
	c = oneway_link?(to, from)
	if c
 debug "FOUND LINK #{c} -- filling it."
 idx = from.exits.index(c)
 from[idx] = nil
 from[dir] = c
 c.dir = Connection::BOTH
 c.exitBtext = go if go
	end
    end

    if not c
	debug "NEW LINK #{from} #{dir} to #{to} #{odir}"
	begin
 c     = @map.new_connection(from, dir, to, odir)
 c.exitAtext = go if go
 c.dir = Connection::AtoB
 c.type = type
	rescue Section::ConnectionError
	end
    end
  }

  return from
end

#debug(*x) ⇒ Object 



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# File 'lib/IFMapper/MapReader.rb', line 53

def debug(*x)
  return unless @@debug
  $stdout.puts x
  $stdout.flush
end

#get_exit(r, from, to, x, y, dx = 1, dy = 0) ⇒ Object 



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# File 'lib/IFMapper/MapReader.rb', line 565

def get_exit(r, from, to, x, y, dx = 1, dy = 0 )
  elem = @tags[to.tag]
  if elem.kind_of?(MapRoom)
    dirB = has_exit_to?(to, r)
    if dirB
	dbx, dby = Room::DIR_TO_VECTOR[dirB]
	if x + dbx != from.x or y + dby != from.y
 x -= dbx
 y -= dby
	end
    end

    room = create_room(to, x, y, dx, dy)
    return [room, Connection::FREE]
  elsif elem.kind_of?(MapDoor)
    if elem.connector
	type = Connection::FREE
    elsif elem.locked
	type = Connection::LOCKED_DOOR
    else
	type = Connection::CLOSED_DOOR
    end

    # Okay, connecting room is missing.  Check door's locations property
    elem.location.each { |tag|
	next if @tags[tag] == from
	@rooms.each { |o|
 next if o.tag != tag
 res = create_room( o, x, y, dx, dy )
 return [ res, type ]
	}
    }
    
#       @rooms.each { |o|
# 	next if @tags[o.tag] == from
# 	o.exits.each { |e|
# 	  next unless e
# 	  if @tags[e] == elem
# 	    res = create_room( o, x, y, dx, dy )
# 	    return [ res, type ]
# 	  end
# 	}
#       }

    $stderr.puts "No room for door #{to.name}: #{to}"
    return [nil, nil]
  else
    return [elem, Connection::FREE]
  end
end

#has_exit_to?(a, b) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/IFMapper/MapReader.rb', line 290

def has_exit_to?(a, b)
  idx = a.exits.rindex(b)
  return idx if idx
  a.exits.each_with_index { |e, idx|
    next unless e
    if e.kind_of?(MapSpecialExit)
	e = e.to
    elsif e.kind_of?(MapObject)
	e.enterable.each { |x|
 return idx if @tags[x] == b
	}
    end
    case e
    when MapDoor
	tag = e.location.find { |t| t != a.tag }
	e = @tags[tag]
	return idx if e == b
    when MapOneWay
	return idx if e.room == b
    else
	return idx if e == b
    end
  }
  return false
end

#make_room(to, x, y, dx = 1, dy = 0) ⇒ Object 



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# File 'lib/IFMapper/MapReader.rb', line 194

def make_room(to, x, y, dx = 1, dy = 0)
  if not @map.free?(x, y)
    @map.shift(x, y, dx, dy)
  end
  room = @map.new_room(x, y)
  room.name = to.name
  desc = to.desc.to_s
  desc.gsub!(/[\t\n]/, ' ')
  desc.squeeze!(' ')
  room.desc     = unquote(desc)
  room.darkness = !to.light
  @tags[to.tag] = room
  return room
end

#new_door(loc = nil) ⇒ Object 



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# File 'lib/IFMapper/MapReader.rb', line 173

def new_door(loc = nil)
  @obj = @tags[@tag] || MapDoor.new
  @obj.tag  = @tag
  @obj.name = @name || @tag
  @obj.location << loc if loc
  @tags[@tag] = @obj
  @doors << @obj
end

#new_obj(loc = nil, klass = MapObject) ⇒ Object 



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# File 'lib/IFMapper/MapReader.rb', line 210

def new_obj(loc = nil, klass = MapObject)
  debug "+++ OBJECT #@name"
  @obj = klass.new(loc)
  @obj.tag  = @tag
  @obj.name = @name # || @tag
  @tags[@tag] = @obj
  @objects << @obj
end

#new_room(klass = MapRoom) ⇒ Object 



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# File 'lib/IFMapper/MapReader.rb', line 184

def new_room(klass = MapRoom)
  # We assume we are a room (albeit we could be an obj)
  @room = klass.new
  @room.tag   = @tag
  @room.name  = @name || @tag
  @room.desc  = ''
  @tags[@tag] = @room
  @rooms << @room
end

#oneway_link?(a, b) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/IFMapper/MapReader.rb', line 480

def oneway_link?(a, b)
  # First, check if room already has exit moving towards other room
  a.exits.each_with_index { |e, idx|
    next if not e or e.dir != Connection::AtoB
    roomA = e.roomA
    roomB = e.roomB
    if roomA == a and roomB == b
	return e
    end
  }
  return nil
end

#properties ⇒ Object

Bring up the properties window, to allow user to change settings



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# File 'lib/IFMapper/MapReader.rb', line 227

def properties
  decor = DECOR_TITLE|DECOR_BORDER

  dlg = FXDialogBox.new( @map.window.parent, "Include Settings", decor )
  mainFrame = FXVerticalFrame.new(dlg,
		    FRAME_SUNKEN|FRAME_THICK|
		    LAYOUT_FILL_X|LAYOUT_FILL_Y)

  frame = FXHorizontalFrame.new(mainFrame, LAYOUT_SIDE_TOP|LAYOUT_FILL_X)

  FXLabel.new(frame, "Include Dirs: ", nil, 0, LAYOUT_FILL_X)
  inc = FXTextField.new(frame, 80, nil, 0, LAYOUT_FILL_ROW)
  inc.text = @include_dirs.join(SEP)

  buttons = FXHorizontalFrame.new(mainFrame, 
		    LAYOUT_SIDE_BOTTOM|LAYOUT_FILL_X|
		    PACK_UNIFORM_WIDTH)
  # Accept
  FXButton.new(buttons, "&Accept", nil, dlg, FXDialogBox::ID_ACCEPT,
 FRAME_RAISED|FRAME_THICK|LAYOUT_RIGHT|LAYOUT_CENTER_Y)
  
  # Cancel
  FXButton.new(buttons, "&Cancel", nil, dlg, FXDialogBox::ID_CANCEL,
 FRAME_RAISED|FRAME_THICK|LAYOUT_RIGHT|LAYOUT_CENTER_Y)
  if dlg.execute != 0
    @include_dirs = inc.text.split(SEP)
    return true
  end
  return false
end

#read_file(file) ⇒ Object 



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# File 'lib/IFMapper/MapReader.rb', line 261

def read_file(file)
  debug "Start parsing #{file}"
  File.open(file) { |f|
    parse(f)
  }
  debug "Done parsing #{file}"
end

#resolve_exits ⇒ Object

Look for one way exits and add them to the proper room exit on the destination side. This is needed so that we properly count room exits and start mapping from rooms with more exits.

Also, resolve up/down/in/out exits into one of the proper 8 directions.



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# File 'lib/IFMapper/MapReader.rb', line 323

def resolve_exits

  if @tags[nil]
    raise "error"
  end

  #
  # First, we resolve tags to the corresponding Map* class.
  # If we deal with a MapDoor that is really a connector, we simplify and
  # just attach the destination room directly.
  # If we deal with a MapDoor with no matching other room, we remove. This
  # can happen in TADS games or if user just read a portion of the full map.
  #
  @rooms.each { |r|
    r.exits.each_with_index { |tag, idx|
	next unless tag
	to = @tags[tag]

	if to.kind_of?(MapDoor)
 if to.location.size == 1
   to = nil
 else
   if to.connector
     t = to.location.find { |t| t != r.tag }
     to = @tags[t]
   end
 end
	end

	if idx > 7
 # if Up/Down/In/Out exit and we have a similar exit
 # going in one direction, remove this exit
 if r.exits[0,8].index(to)
   r.exits[idx] = nil
   next
 end
	end

	if not to
 if not @functions.include?(tag)
   $stderr.puts "Exit to #{tag} not found, ignored."
 end
	end

	r.exits[idx] = to
    }
  }

  @rooms.each { |r|
    r.exits.each_with_index { |e, dirA|
	next if not e or e.kind_of?(MapOneWay)
	next if e == r

	##
	# Do we have a special exit?
	if dirA > 7
 # First, get dirB and see if it is not a proper directional
 # exit
 dirB = nil
 if e.kind_of?(MapRoom)
   dirB = has_exit_to?(e, r)
 elsif e.kind_of?(MapDoor)
   t = e.location.find { |t| t != r.tag }
   to = @tags[t]
   if to
     to.exits.each_with_index { |d, idx|
if d == e or d == r
  dirB = idx
  break
end
     }
   end
 end

 dirB = 4 if not dirB or dirB > 7

 go = dirA - 7
 r.exits[dirA] = nil
 dirA = best_dir(r, dirB)
 next if not dirA
 r.exits[dirA] = MapSpecialExit.new(go, e)
	end


	###############

	# we have a room or door exit

	if e.kind_of?(MapRoom)
 # check if destination room also has a connection towards us.
 next if has_exit_to?(e, r)

 dirB = best_dir(e, dirA)
 next unless dirB

 e.exits[dirB] = MapOneWay.new(r)

	elsif e.kind_of?(MapDoor)
 t = e.location.find { |t| t != r.tag }
 found = false
 to = @tags[t]
 if to
   to.exits.each_with_index { |d, idx|
     next if not d
     if d == e or d == r
found = true
break
     end
   }
 end

 if to and not found
   dirB = best_dir(to, dirA)
   next unless dirB
   to.exits[dirB] = MapOneWay.new(r)
 end
	elsif e.kind_of?(MapObject)
	else
 raise "Unknown exit type #{e.class}"
	end
    }
  }



end

#set_include_dirs ⇒ Object 



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# File 'lib/IFMapper/MapReader.rb', line 258

def set_include_dirs
end

#shift_link(room, dir) ⇒ Object 



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# File 'lib/IFMapper/MapReader.rb', line 450

def shift_link(room, dir)
  idx = dir + 1
  idx = 0 if idx > 7
  while idx != dir
    break if not room[idx]
    idx += 1
    idx = 0 if idx > 7
  end
  if idx != dir
    room[idx] = room[dir]
    room[dir] = nil
    # get position of other room
    ox, oy = Room::DIR_TO_VECTOR[dir]
    c = room[idx]
    if c.roomA == room
	b = c.roomB
    else
	b = c.roomA
    end
    x, y = [b.x, b.y]
    x -= ox
    y -= oy
    dx, dy = Room::DIR_TO_VECTOR[idx]
    @map.shift(x, y, -dx, -dy)
  else
    # raise "Warning.  Cannot shift connection for #{room}."
  end
end