tktext.rb

ruby的源代码

#
#		tktext.rb - Tk text classes
#			$Date: 2002/03/08 06:59:55 $
#			by Yukihiro Matsumoto <[e-mail]>

require 'tk.rb'
require 'tkfont'

module TkTreatTextTagFont
  include TkTreatItemFont

  ItemCMD = ['tag', 'configure']
  def __conf_cmd(idx)
    ItemCMD[idx]
  end

  def __item_pathname(tagOrId)
    if tagOrId.kind_of?(TkTextTag)
      self.path + ';' + tagOrId.id
    else
      self.path + ';' + tagOrId
    end
  end
end

class TkText<TkTextWin
  ItemConfCMD = ['tag', 'configure']
  include TkTreatTextTagFont
  include Scrollable

  WidgetClassName = 'Text'.freeze
  WidgetClassNames[WidgetClassName] = self

  def self.to_eval
    WidgetClassName
  end

  def self.new(*args, &block)
    obj = super(*args){}
    obj.init_instance_variable
    obj.instance_eval(&block) if defined? yield
    obj
  end

  def init_instance_variable
    @tags = {}
  end

  def create_self(keys)
    if keys and keys != None
      tk_call 'text', @path, *hash_kv(keys)
    else
      tk_call 'text', @path
    end
    init_instance_variable
  end

  def index(index)
    tk_send 'index', index
  end

  def value
    tk_send 'get', "1.0", "end - 1 char"
  end

  def value= (val)
    tk_send 'delete', "1.0", 'end'
    tk_send 'insert', "1.0", val
  end

  def _addcmd(cmd)
    @cmdtbl.push cmd
  end

  def _addtag(name, obj)
    @tags[name] = obj
  end

  def tagid2obj(tagid)
    if not @tags[tagid]
      tagid
    else
      @tags[tagid]
    end
  end

  def tag_names(index=None)
    tk_split_list(tk_send('tag', 'names', index)).collect{|elt|
      tagid2obj(elt)
    }
  end

  def mark_names
    tk_split_list(tk_send('mark', 'names')).collect{|elt|
      tagid2obj(elt)
    }
  end

  def mark_next(index)
    tagid2obj(tk_send('mark', 'next', index))
  end

  def mark_previous(index)
    tagid2obj(tk_send('mark', 'previous', index))
  end

  def window_names
    tk_send('window', 'names').collect{|elt|
      tagid2obj(elt)
    }
  end

  def image_names
    tk_send('image', 'names').collect{|elt|
      tagid2obj(elt)
    }
  end

  def set_insert(index)
    tk_send 'mark', 'set', 'insert', index
  end

  def set_current(index)
    tk_send 'mark', 'set', 'current', index
  end

  def insert(index, chars, *tags)
    super index, chars, tags.collect{|x|_get_eval_string(x)}.join(' ')
  end

  def destroy
    @tags = {} unless @tags
    @tags.each_value do |t|
      t.destroy
    end
    super
  end

  def backspace
    self.delete 'insert'
  end

  def compare(idx1, op, idx2)
    bool(tk_send('compare', idx1, op, idx2))
  end

  def debug
    bool(tk_send('debug'))
  end
  def debug=(boolean)
    tk_send 'debug', boolean
  end

  def bbox(index)
    inf = tk_send('bbox', index)
    (inf == "")?  [0,0,0,0]: inf
  end
  def dlineinfo(index)
    inf = tk_send('dlineinfo', index)
    (inf == "")?  [0,0,0,0,0]: inf
  end

  def yview_pickplace(*what)
    tk_send 'yview', '-pickplace', *what
  end

  def xview_pickplace(*what)
    tk_send 'xview', '-pickplace', *what
  end

  def tag_add(tag, index1, index2=None)
    tk_send 'tag', 'add', tag, index1, index2
  end

  def tag_bind(tag, seq, cmd=Proc.new, args=nil)
    _bind(['tag', 'bind', tag], seq, cmd, args)
  end

  def tag_bind_append(tag, seq, cmd=Proc.new, args=nil)
    _bind_append(['tag', 'bind', tag], seq, cmd, args)
  end

  def tag_bindinfo(tag, context=nil)
    _bindinfo(['tag', 'bind', tag], context)
  end

  def tag_cget(tag, key)
    case key
    when 'text', 'label', 'show', 'data', 'file'
      tk_call @path, 'tag', 'cget', tag, "-#{key}"
    else
      tk_tcl2ruby tk_call @path, 'tag', 'cget', tag, "-#{key}"
    end
  end

  def tag_configure(tag, key, val=None)
    if key.kind_of? Hash
      if ( key['font'] || key['kanjifont'] \
	  || key['latinfont'] || key['asciifont'] )
	tagfont_configure(tag, key.dup)
      else
	tk_send 'tag', 'configure', tag, *hash_kv(key)
      end

    else
      if  key == 'font' || key == 'kanjifont' ||
	  key == 'latinfont' || key == 'asciifont'
	tagfont_configure(tag, {key=>val})
      else
	tk_send 'tag', 'configure', tag, "-#{key}", val
      end
    end
  end

  def tag_configinfo(tag, key=nil)
    if key
      case key
      when 'text', 'label', 'show', 'data', 'file'
	conf = tk_split_simplelist(tk_send('tag','configure',tag,"-#{key}"))
      else
	conf = tk_split_list(tk_send('tag','configure',tag,"-#{key}"))
      end
      conf[0] = conf[0][1..-1]
      conf
    else
      tk_split_simplelist(tk_send('tag', 'configure', tag)).collect{|conflist|
	conf = tk_split_simplelist(conflist)
	conf[0] = conf[0][1..-1]
	case conf[0]
	when 'text', 'label', 'show', 'data', 'file'
	else
	  if conf[3]
	    if conf[3].index('{')
	      conf[3] = tk_split_list(conf[3]) 
	    else
	      conf[3] = tk_tcl2ruby(conf[3]) 
	    end
	  end
	  if conf[4]
	    if conf[4].index('{')
	      conf[4] = tk_split_list(conf[4]) 
	    else
	      conf[4] = tk_tcl2ruby(conf[4]) 
	    end
	  end
	end
	conf
      }
    end
  end

  def tag_raise(tag, above=None)
    tk_send 'tag', 'raise', tag, above
  end

  def tag_lower(tag, below=None)
    tk_send 'tag', 'lower', tag, below
  end

  def tag_remove(tag, *index)
    tk_send 'tag', 'remove', tag, *index
  end

  def tag_ranges(tag)
    l = tk_split_simplelist(tk_send('tag', 'ranges', tag))
    r = []
    while key=l.shift
      r.push [key, l.shift]
    end
    r
  end

  def tag_nextrange(tag, first, last=None)
    tk_split_simplelist(tk_send('tag', 'nextrange', tag, first, last))
  end

  def tag_prevrange(tag, first, last=None)
    tk_split_simplelist(tk_send('tag', 'prevrange', tag, first, last))
  end

  def _ktext_length(txt)
    if $KCODE !~ /n/i
      return txt.gsub(/[^\Wa-zA-Z_\d]/, ' ').length
    end

    # $KCODE == 'NONE'
    if JAPANIZED_TK
      tk_call('kstring', 'length', txt).to_i
    else
      begin
	tk_call('encoding', 'convertto', 'ascii', txt).length
      rescue StandardError, NameError
	# sorry, I have no plan
	txt.length
      end
    end
  end
  private :_ktext_length

  def search_with_length(pat,start,stop=None)
    pat = pat.chr if pat.kind_of? Integer
    if stop != None
      return ["", 0] if compare(start,'>=',stop)
      txt = get(start,stop)
      if (pos = txt.index(pat))
	match = $&
	#pos = txt[0..(pos-1)].split('').length if pos > 0
	pos = _ktext_length(txt[0..(pos-1)]) if pos > 0
	if pat.kind_of? String
	  #return [index(start + " + #{pos} chars"), pat.split('').length]
	  return [index(start + " + #{pos} chars"), 
		  _ktext_length(pat), pat.dup]
	else
	  #return [index(start + " + #{pos} chars"), $&.split('').length]
	  return [index(start + " + #{pos} chars"), 
		  _ktext_length(match), match]
	end
      else
	return ["", 0]
      end
    else
      txt = get(start,'end - 1 char')
      if (pos = txt.index(pat))
	match = $&
	#pos = txt[0..(pos-1)].split('').length if pos > 0
	pos = _ktext_length(txt[0..(pos-1)]) if pos > 0
	if pat.kind_of? String
	  #return [index(start + " + #{pos} chars"), pat.split('').length]
	  return [index(start + " + #{pos} chars"), 
		  _ktext_length(pat), pat.dup]
	else
	  #return [index(start + " + #{pos} chars"), $&.split('').length]
	  return [index(start + " + #{pos} chars"), 
		  _ktext_length(match), match]
	end
      else
	txt = get('1.0','end - 1 char')
	if (pos = txt.index(pat))
	  match = $&
	  #pos = txt[0..(pos-1)].split('').length if pos > 0
	  pos = _ktext_length(txt[0..(pos-1)]) if pos > 0
	  if pat.kind_of? String
	    #return [index("1.0 + #{pos} chars"), pat.split('').length]
	    return [index("1.0 + #{pos} chars"), 
		    _ktext_length(pat), pat.dup]
	  else
	    #return [index("1.0 + #{pos} chars"), $&.split('').length]
	    return [index("1.0 + #{pos} chars"), _ktext_length(match), match]
	  end
	else
	  return ["", 0]
	end
      end
    end
  end

  def search(pat,start,stop=None)
    search_with_length(pat,start,stop)[0]
  end

  def rsearch_with_length(pat,start,stop=None)
    pat = pat.chr if pat.kind_of? Integer
    if stop != None
      return ["", 0] if compare(start,'<=',stop)
      txt = get(stop,start)
      if (pos = txt.rindex(pat))
	match = $&
	#pos = txt[0..(pos-1)].split('').length if pos > 0
	pos = _ktext_length(txt[0..(pos-1)]) if pos > 0
	if pat.kind_of? String
	  #return [index(stop + " + #{pos} chars"), pat.split('').length]
	  return [index(stop + " + #{pos} chars"), _ktext_length(pat), pat.dup]
	else
	  #return [index(stop + " + #{pos} chars"), $&.split('').length]
	  return [index(stop + " + #{pos} chars"), _ktext_length(match), match]
	end
      else
	return ["", 0]
      end
    else
      txt = get('1.0',start)
      if (pos = txt.rindex(pat))
	match = $&
	#pos = txt[0..(pos-1)].split('').length if pos > 0
	pos = _ktext_length(txt[0..(pos-1)]) if pos > 0
	if pat.kind_of? String
	  #return [index("1.0 + #{pos} chars"), pat.split('').length]
	  return [index("1.0 + #{pos} chars"), _ktext_length(pat), pat.dup]
	else
	  #return [index("1.0 + #{pos} chars"), $&.split('').length]
	  return [index("1.0 + #{pos} chars"), _ktext_length(match), match]
	end
      else
	txt = get('1.0','end - 1 char')
	if (pos = txt.rindex(pat))
	  match = $&
	  #pos = txt[0..(pos-1)].split('').length if pos > 0
	  pos = _ktext_length(txt[0..(pos-1)]) if pos > 0
	  if pat.kind_of? String
	    #return [index("1.0 + #{pos} chars"), pat.split('').length]
	    return [index("1.0 + #{pos} chars"), _ktext_length(pat), pat.dup]
	  else
	    #return [index("1.0 + #{pos} chars"), $&.split('').length]
	    return [index("1.0 + #{pos} chars"), _ktext_length(match), match]
	  end
	else
	  return ["", 0]
	end
      end
    end
  end

  def rsearch(pat,start,stop=None)
    rsearch_with_length(pat,start,stop)[0]
  end

  def dump(type_info, *index, &block)
    args = type_info.collect{|inf| '-' + inf}
    args << '-command' << Proc.new(&block) if iterator?
    str = tk_send('dump', *(args + index))
    result = []
    sel = nil
    i = 0
    while i < str.size
      # retrieve key
      idx = str.index(/ /, i)
      result.push str[i..(idx-1)]
      i = idx + 1
      
      # retrieve value
      case result[-1]
      when 'text'
	if str[i] == ?{
	  # text formed as {...}
	  val, i = _retrieve_braced_text(str, i)
	  result.push val
	else
	  # text which may contain backslahes
	  val, i = _retrieve_backslashed_text(str, i)
	  result.push val
	end
      else
	idx = str.index(/ /, i)
	val = str[i..(idx-1)]
	case result[-1]
	when 'mark'
	  case val
	  when 'insert'
	    result.push TkTextMarkInsert.new(self)
	  when 'current'
	    result.push TkTextMarkCurrent.new(self)
	  when 'anchor'
	    result.push TkTextMarkAnchor.new(self)
	  else
	    result.push tk_tcl2ruby(val)
	  end
	when 'tagon'
	  if val == 'sel'
	    if sel
	      result.push sel
	    else
	      result.push TkTextTagSel.new(self)
	    end
	  else
	    result.push tk_tcl2ruby(val)
	  end
	when 'tagoff'
	    result.push tk_tcl2ruby(sel)
	when 'window'
	  result.push tk_tcl2ruby(val)
	end
	i = idx + 1
      end

      # retrieve index
      idx = str.index(/ /, i)
      if idx
	result.push str[i..(idx-1)]
	i = idx + 1
      else
	result.push str[i..-1]
	break
      end
    end
    
    kvis = []
    until result.empty?
      kvis.push [result.shift, result.shift, result.shift]
    end
    kvis  # result is [[key1, value1, index1], [key2, value2, index2], ...]
  end

  def _retrieve_braced_text(str, i)
    cnt = 0
    idx = i
    while idx < str.size
      case str[idx]
      when ?{
	cnt += 1
      when ?}
	cnt -= 1