#
# tk/texttag.rb - methods for treating text tags
#
require 'tk'
require 'tk/text'
require 'tk/tagfont'

class TkTextTag<TkObject
  include TkTreatTagFont

  TTagID_TBL = TkCore::INTERP.create_table
  Tk_TextTag_ID = ['tag'.freeze, '00000'.taint].freeze

  TkCore::INTERP.init_ip_env{ TTagID_TBL.clear }

  def TkTextTag.id2obj(text, id)
    tpath = text.path
    return id unless TTagID_TBL[tpath]
    TTagID_TBL[tpath][id]? TTagID_TBL[tpath][id]: id
  end

  def initialize(parent, *args)
    unless parent.kind_of?(TkText)
      fail ArguemntError, "expect TkText for 1st argument"
    end
    @parent = @t = parent
    @tpath = parent.path
    @path = @id = Tk_TextTag_ID.join('')
    TTagID_TBL[@id] = self
    TTagID_TBL[@tpath] = {} unless TTagID_TBL[@tpath]
    TTagID_TBL[@tpath][@id] = self
    Tk_TextTag_ID[1].succ!
    #tk_call @t.path, "tag", "configure", @id, *hash_kv(keys)
    if args != [] then
      keys = args.pop
      if keys.kind_of? Hash then
	add(*args) if args != []
	configure(keys)
      else
	args.push keys
	add(*args)
      end
    end
    @t._addtag id, self
  end

  def id
    @id
  end

  def first
    @id + '.first'
  end

  def last
    @id + '.last'
  end

  def add(*indices)
    tk_call_without_enc(@t.path, 'tag', 'add', @id, 
			*(indices.collect{|idx| _get_eval_enc_str(idx)}))
    self
  end

  def remove(*indices)
    tk_call_without_enc(@t.path, 'tag', 'remove', @id, 
			*(indices.collect{|idx| _get_eval_enc_str(idx)}))
    self
  end

  def ranges
    l = tk_split_simplelist(tk_call_without_enc(@t.path, 'tag', 'ranges', @id))
    r = []
    while key=l.shift
      r.push [key, l.shift]
    end
    r
  end

  def nextrange(first, last=None)
    tk_split_list(tk_call_without_enc(@t.path, 'tag', 'nextrange', @id, 
				      _get_eval_enc_str(first), 
				      _get_eval_enc_str(last)))
  end

  def prevrange(first, last=None)
    tk_split_list(tk_call_without_enc(@t.path, 'tag', 'prevrange', @id, 
				      _get_eval_enc_str(first), 
				      _get_eval_enc_str(last)))
  end

  def [](key)
    cget key
  end

  def []=(key,val)
    configure key, val
    val
  end

  def cget(key)
    case key.to_s
    when 'text', 'label', 'show', 'data', 'file'
      _fromUTF8(tk_call_without_enc(@t.path, 'tag', 'cget', @id, "-#{key}"))
    when 'font', 'kanjifont'
      #fnt = tk_tcl2ruby(tk_call(@t.path, 'tag', 'cget', @id, "-#{key}"))
      fnt = tk_tcl2ruby(_fromUTF8(tk_call_without_enc(@t.path, 'tag', 'cget', 
						      @id, '-font')))
      unless fnt.kind_of?(TkFont)
	fnt = tagfontobj(@id, fnt)
      end
      if key.to_s == 'kanjifont' && JAPANIZED_TK && TK_VERSION =~ /^4\.*/
	# obsolete; just for compatibility
	fnt.kanji_font
      else
	fnt
      end
    else
      tk_tcl2ruby(_fromUTF8(tk_call_without_enc(@t.path, 'tag', 'cget', 
						@id, "-#{key}")))
    end
  end

  def configure(key, val=None)
    @t.tag_configure @id, key, val
  end
#  def configure(key, val=None)
#    if key.kind_of? Hash
#      tk_call @t.path, 'tag', 'configure', @id, *hash_kv(key)
#    else
#      tk_call @t.path, 'tag', 'configure', @id, "-#{key}", val
#    end
#  end
#  def configure(key, value)
#    if value == FALSE
#      value = "0"
#    elsif value.kind_of? Proc
#      value = install_cmd(value)
#    end
#    tk_call @t.path, 'tag', 'configure', @id, "-#{key}", value
#  end

  def configinfo(key=nil)
    @t.tag_configinfo @id, key
  end

  def current_configinfo(key=nil)
    @t.current_tag_configinfo @id, key
  end

  def bind(seq, cmd=Proc.new, args=nil)
    _bind([@t.path, 'tag', 'bind', @id], seq, cmd, args)
    self
  end

  def bind_append(seq, cmd=Proc.new, args=nil)
    _bind_append([@t.path, 'tag', 'bind', @id], seq, cmd, args)
    self
  end

  def bind_remove(seq)
    _bind_remove([@t.path, 'tag', 'bind', @id], seq)
    self
  end

  def bindinfo(context=nil)
    _bindinfo([@t.path, 'tag', 'bind', @id], context)
  end

  def raise(above=None)
    tk_call_without_enc(@t.path, 'tag', 'raise', @id, 
			_get_eval_enc_str(above))
    self
  end

  def lower(below=None)
    tk_call_without_enc(@t.path, 'tag', 'lower', @id, 
			_get_eval_enc_str(below))
    self
  end

  def destroy
    tk_call_without_enc(@t.path, 'tag', 'delete', @id)
    TTagID_TBL[@tpath].delete(@id) if TTagID_TBL[@tpath]
    self
  end
end

class TkTextNamedTag<TkTextTag
  def self.new(parent, name, *args)
    if TTagID_TBL[parent.path] && TTagID_TBL[parent.path][name]
      tagobj = TTagID_TBL[parent.path][name]
      if args != [] then
	keys = args.pop
	if keys.kind_of? Hash then
	  tagobj.add(*args) if args != []
	  tagobj.configure(keys)
	else
	  args.push keys
	  tagobj.add(*args)
	end
      end
      return tagobj
    else
      super(parent, name, *args)
    end
  end

  def initialize(parent, name, *args)
    unless parent.kind_of?(TkText)
      fail ArguemntError, "expect TkText for 1st argument"
    end
    @parent = @t = parent
    @tpath = parent.path
    @path = @id = name
    TTagID_TBL[@tpath] = {} unless TTagID_TBL[@tpath]
    TTagID_TBL[@tpath][@id] = self unless TTagID_TBL[@tpath][@id]
    #if mode
    #  tk_call @t.path, "addtag", @id, *args
    #end
    if args != [] then
      keys = args.pop
      if keys.kind_of? Hash then
	add(*args) if args != []
	configure(keys)
      else
	args.push keys
	add(*args)
      end
    end
    @t._addtag id, self
  end
end

class TkTextTagSel<TkTextNamedTag
  def self.new(parent, *args)
    super(parent, 'sel', *args)
  end
end