Class: Buffer

Inherits:
String
  • Object
show all
Defined in:
lib/vimamsa/buffer.rb

Constant Summary collapse

@@num_buffers = 
0

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(str = "\n", fname = nil) ⇒ Buffer

Returns a new instance of Buffer.



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# File 'lib/vimamsa/buffer.rb', line 25

def initialize(str = "\n", fname = nil)
  debug "Buffer.rb: def initialize"
  super(str)

  @images = []
  @lang = nil
  @id = @@num_buffers
  @@num_buffers += 1
  gui_create_buffer(@id, self)
  debug "NEW BUFFER fn=#{fname} ID:#{@id}"

  @module = nil

  @crypt = nil
  @update_highlight = true
  @syntax_detect_failed = false
  @is_parsing_syntax = false
  @last_update = Time.now - 100
  @highlights = {}
  if fname != nil
    @fname = File.expand_path(fname)
    detect_file_language()
  else
    @fname = fname
  end
  @hl_queue = []
  @line_action_handler = nil

  @dirname = nil
  @title = "*buf-#{@id}*"
  @subtitle = ""

  if @fname
    @title = File.basename(@fname)
    @dirname = File.dirname(@fname)
    userhome = File.expand_path("~")
    @subtitle = @dirname.gsub(/^#{userhome}/, "~")
  end

  t1 = Time.now
  gui_set_current_buffer(@id)
  gui_set_window_title(@title, @subtitle)

  set_content(str)
  debug "init time:#{Time.now - t1}"

  # TODO: add \n when chars are added after last \n
  self << "\n" if self[-1] != "\n"
  @current_word = nil
  @active_kbd_mode = nil
end

Instance Attribute Details

#active_kbd_mode ⇒ Object

Returns the value of attribute active_kbd_mode.



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# File 'lib/vimamsa/buffer.rb', line 21

def active_kbd_mode
  @active_kbd_mode
end

#basename ⇒ Object (readonly)

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def basename
  @basename
end

#bt ⇒ Object

Returns the value of attribute bt.



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# File 'lib/vimamsa/buffer.rb', line 21

def bt
  @bt
end

#call_func ⇒ Object

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def call_func
  @call_func
end

#cpos ⇒ Object (readonly)

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def cpos
  @cpos
end

#deltas ⇒ Object (readonly)

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def deltas
  @deltas
end

#dirname ⇒ Object (readonly)

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def dirname
  @dirname
end

#edit_history ⇒ Object (readonly)

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def edit_history
  @edit_history
end

#fname ⇒ Object (readonly)

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def fname
  @fname
end

#gui_reset_highlight ⇒ Object

Returns the value of attribute gui_reset_highlight.



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# File 'lib/vimamsa/buffer.rb', line 21

def gui_reset_highlight
  @gui_reset_highlight
end

#gui_update_highlight ⇒ Object

Returns the value of attribute gui_update_highlight.



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# File 'lib/vimamsa/buffer.rb', line 21

def gui_update_highlight
  @gui_update_highlight
end

#highlights ⇒ Object

Returns the value of attribute highlights.



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# File 'lib/vimamsa/buffer.rb', line 21

def highlights
  @highlights
end

#hl_queue ⇒ Object

Returns the value of attribute hl_queue.



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# File 'lib/vimamsa/buffer.rb', line 21

def hl_queue
  @hl_queue
end

#id ⇒ Object (readonly)

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def id
  @id
end

#images ⇒ Object (readonly)

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def images
  @images
end

#is_highlighted ⇒ Object (readonly)

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def is_highlighted
  @is_highlighted
end

#is_parsing_syntax ⇒ Object

Returns the value of attribute is_parsing_syntax.



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# File 'lib/vimamsa/buffer.rb', line 21

def is_parsing_syntax
  @is_parsing_syntax
end

#lang ⇒ Object (readonly)

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def lang
  @lang
end

#line_action_handler ⇒ Object

Returns the value of attribute line_action_handler.



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# File 'lib/vimamsa/buffer.rb', line 21

def line_action_handler
  @line_action_handler
end

#line_ends ⇒ Object

Returns the value of attribute line_ends.



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# File 'lib/vimamsa/buffer.rb', line 21

def line_ends
  @line_ends
end

#lpos ⇒ Object (readonly)

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def lpos
  @lpos
end

#marks ⇒ Object (readonly)

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def marks
  @marks
end

#module ⇒ Object

Returns the value of attribute module.



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# File 'lib/vimamsa/buffer.rb', line 21

def module
  @module
end

#pathname ⇒ Object (readonly)

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def pathname
  @pathname
end

#pos ⇒ Object (readonly)

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def pos
  @pos
end

#subtitle ⇒ Object

Returns the value of attribute subtitle.



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# File 'lib/vimamsa/buffer.rb', line 21

def subtitle
  @subtitle
end

#syntax_detect_failed ⇒ Object (readonly)

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def syntax_detect_failed
  @syntax_detect_failed
end

#syntax_parser ⇒ Object

Returns the value of attribute syntax_parser.



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# File 'lib/vimamsa/buffer.rb', line 21

def syntax_parser
  @syntax_parser
end

#title ⇒ Object

Returns the value of attribute title.



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# File 'lib/vimamsa/buffer.rb', line 21

def title
  @title
end

#update_highlight ⇒ Object

attr_reader (:pos, :cpos, :lpos)



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# File 'lib/vimamsa/buffer.rb', line 19

def update_highlight
  @update_highlight
end

#update_hl_endpos ⇒ Object

Returns the value of attribute update_hl_endpos.



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# File 'lib/vimamsa/buffer.rb', line 21

def update_hl_endpos
  @update_hl_endpos
end

#update_hl_startpos ⇒ Object

Returns the value of attribute update_hl_startpos.



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# File 'lib/vimamsa/buffer.rb', line 21

def update_hl_startpos
  @update_hl_startpos
end

Instance Method Details

#add_delta(delta, apply = false, auto_update_cpos = false) ⇒ Object

TODO: change to apply=true as default



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# File 'lib/vimamsa/buffer.rb', line 371

def add_delta(delta, apply = false, auto_update_cpos = false)
  return if !is_delta_ok(delta)
  if delta[1] == DELETE
    return if delta[0] >= self.size
    # If go over length of buffer
    if delta[0] + delta[2] >= self.size
      delta[2] = self.size - delta[0]
    end
  end

  @edit_version += 1
  @redo_stack = []
  if apply
    delta = run_delta(delta, auto_update_cpos)
  else
    @deltas << delta
  end
  @edit_history << delta
  if self[-1] != "\n"
    add_delta([self.size, INSERT, 1, "\n"], true)
  end
  reset_larger_cpos #TODO: correct here?
end

#add_hl_update(startpos, endpos) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 395

def add_hl_update(startpos, endpos)
  return if @is_highlighted == false

  debug "@update_hl_endpos = #{endpos}"
  @hl_queue << [startpos, endpos]
end

#add_image(imgpath, pos) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 133

def add_image(imgpath, pos)
  return if !is_legal_pos(pos)

  vbuf = view.buffer
  itr = vbuf.get_iter_at(:offset => pos)
  itr2 = vbuf.get_iter_at(:offset => pos + 1)
  vbuf.delete(itr, itr2)
  anchor = vbuf.create_child_anchor(itr)

  da = ResizableImage.new(imgpath, view)
  view.add_child_at_anchor(da, anchor)
  da.signal_connect "draw" do |widget, cr|
    da.do_draw(widget, cr)
  end

  da.scale_image

  vma.gui.handle_image_resize
  @images << { :path => imgpath, :obj => da }

  gui_set_current_buffer(@id)
end

#add_new_line(txt) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 175

def add_new_line(txt)
  # buf.jump(END_OF_LINE);buf.insert_txt("\n");
end

#at_end_of_buffer? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vimamsa/buffer.rb', line 791

def at_end_of_buffer?()
  return @pos == self.size
end

#at_end_of_line? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vimamsa/buffer.rb', line 787

def at_end_of_line?()
  return (self[@pos] == "\n" or at_end_of_buffer?)
end

#backup ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1786

def backup()
  fname = @fname
  return if !@fname
  spfx = fname.gsub("=", "==").gsub("/", "=:")
  spath = File.expand_path("~/.vimamsa/backup")
  return false if !can_save_to_directory?(spath)
  datetime = DateTime.now().strftime("%d%m%Y:%H%M%S")
  savepath = "#{spath}/#{spfx}_#{datetime}"
  message("Backup buffer #{fname} TO: #{savepath}")
  if is_path_writable(savepath)
    write_contents_to_file(savepath)
  else
    message("PATH NOT WRITABLE: #{savepath}")
  end
end

#calculate_line_and_column_pos(reset = true) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 830

def calculate_line_and_column_pos(reset = true)
  @lpos, @cpos = get_line_and_col_pos(@pos)
  reset_larger_cpos if reset
end

#calculate_pos_from_cpos_lpos(reset = true) ⇒ Object

Calculate the one dimensional array index based on column and line positions



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# File 'lib/vimamsa/buffer.rb', line 857

def calculate_pos_from_cpos_lpos(reset = true)
  set_line_and_column_pos(nil, nil)
end

#close ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1781

def close()
  idx = vma.buffers.get_buffer_by_id(@id)
  vma.buffers.close_buffer(idx)
end

#comment_line(op = :comment) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 661

def comment_line(op = :comment)
  num_lines = get_repeat_num()
  lrange = line_range(@lpos, num_lines)
  if op == :comment
    comment_linerange(lrange)
  elsif op == :uncomment
    uncomment_linerange(lrange)
  end
end

#comment_linerange(r) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 576

def comment_linerange(r)
  com_str = get_com_str()
  lines = self[r].lines
  mod = ""
  lines.each { |line|
    m = line.match(/^(\s*)(\S.*)/)
    if m == nil or m[2].size == 0
      ret = line
    elsif m[2].size > 0
      ret = "#{m[1]}#{com_str} #{m[2]}\n"
    end
    mod << ret
  }
  replace_range(r, mod)
end

#comment_selection(op = :comment) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 629

def comment_selection(op = :comment)
  if visual_mode?
    (startpos, endpos) = get_visual_mode_range2
    first = get_line_start(startpos)
    #      last = get_line_end(endpos)
    last = get_line_end(endpos - 1)
    if op == :comment
      comment_linerange(first..last)
    elsif op == :uncomment
      uncomment_linerange(first..last)
    end
    self.end_visual_mode
  end
end

#context_menu_items ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1089

def context_menu_items()
  m = []
  if @visual_mode
    seltxt = get_current_selection
    m << ["Copy", self.method("copy_active_selection"), nil]
    m << ["Join lines", self.method("convert_selected_text"), :joinlines]
    # m << ["Sort", self.method("convert_selected_text"), :sortlines]
    m << ["Sort", method("call"), :sortlines]
    m << ["Filter: get numbers", method("call"), :getnums_on_lines]
    m << ["Delete selection", method("call"), :delete_selection]

    # m << ["Search in dictionary", self.method("handle_word"), nil]
    # m << ["Search in google", self.method("handle_word"), nil]
    m << ["Execute in terminal", method("exec_in_terminal"), seltxt]
  else
    (word, wtype) = get_cur_nonwhitespace_word()
    if wtype == :url
      m << ["Open url", self.method("open_url"), word]
    elsif wtype == :linepointer
      m << ["Jump to line", self.method("handle_word"), [word, wtype]]
    elsif wtype == :textfile
      m << ["Open text file", self.method("handle_word"), [word, wtype]]
    elsif wtype == :file
      m << ["Open file (xdg-open)", self.method("handle_word"), [word, wtype]]
    elsif wtype == :hpt_link
      m << ["Jump to file", self.method("handle_word"), [word, wtype]]
    else
      # m << ["TODO", self.method("handle_word"), word]
      m << ["Paste", method("call"), :paste_after]
    end
  end
  return m
end

#convert_selected_text(converter_id) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1568

def convert_selected_text(converter_id)
  return if !@visual_mode
  r = get_visual_mode_range
  txt = self[r]
  txt = $vma.apply_conv(converter_id, txt)
  #TODO: Detect if changed?
  replace_range(r, txt)
  end_visual_mode
end

#copy(range_id) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 699

def copy(range_id)
  $paste_lines = false
  debug "range_id: #{range_id}"
  debug range_id.inspect
  range = get_range(range_id)
  debug range.inspect
  set_clipboard(self[range])
end

#copy_active_selection(x = nil) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1537

def copy_active_selection(x = nil)
  debug "!COPY SELECTION"
  $paste_lines = false
  return if !@visual_mode

  debug "COPY SELECTION"
  s = self[get_visual_mode_range]
  if x == :append
    debug "APPEND"
    s += "\n" + get_clipboard()
  end

  set_clipboard(s)
  end_visual_mode
  return true
end

#copy_line ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1611

def copy_line()
  $method_handles_repeat = true
  num_lines = 1
  if !$next_command_count.nil? and $next_command_count > 0
    num_lines = $next_command_count
    debug "copy num_lines:#{num_lines}"
  end
  set_clipboard(self[line_range(@lpos, num_lines)])
  $paste_lines = true
end

#cur_nonwhitespace_word_action ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1174

def cur_nonwhitespace_word_action()

  # (word, wtype) = get_cur_nonwhitespace_word()
  wnfo = get_cur_nonwhitespace_word()
  handle_word(wnfo)
end

#current_char ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 543

def current_char()
  return self[@pos]
end

#current_line ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 547

def current_line()
  range = line_range(@lpos, 1)
  return self[range]
end

#current_line_range ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 676

def current_line_range()
  range = line_range(@lpos, 1)
  return range
end

#decrypt(password) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 216

def decrypt(password)
  begin
    @crypt = Encrypt.new(password)
    str = @crypt.decrypt(@encrypted_str)
  rescue OpenSSL::Cipher::CipherError => e
    str = "incorrect password"
  end
  self.set_content(str)
end

#delete(op) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 874

def delete(op)
  $paste_lines = false
  # Delete selection
  if op == SELECTION && visual_mode?
    (startpos, endpos) = get_visual_mode_range2
    delete_range(startpos, endpos)
    @pos = [@pos, @selection_start].min
    end_visual_mode
    #return

    # Delete current char
  elsif op == CURRENT_CHAR_FORWARD
    return if @pos >= self.size - 1 # May not delete last '\n'
    add_delta([@pos, DELETE, 1], true)

    # Delete current char and then move backward
  elsif op == CURRENT_CHAR_BACKWARD
    add_delta([@pos, DELETE, 1], true)
    @pos -= 1

    # Delete the char before current char and move backward
  elsif op == BACKWARD_CHAR and @pos > 0
    add_delta([@pos - 1, DELETE, 1], true)
    @pos -= 1
  elsif op == FORWARD_CHAR #TODO: ok?
    add_delta([@pos + 1, DELETE, 1], true)
  end
  set_pos(@pos)
  #recalc_line_ends
  calculate_line_and_column_pos
  #need_redraw!
end

#delete2(range_id) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 861

def delete2(range_id)
  $paste_lines = false
  range = get_range(range_id)
  return if range == nil
  debug "RANGE"
  debug range.inspect
  debug range.inspect
  debug "------"
  delete_range(range.first, range.last)
  pos = [range.first, @pos].min
  set_pos(pos)
end

#delete_active_selection ⇒ Object

TODO: remove this function



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# File 'lib/vimamsa/buffer.rb', line 1626

def delete_active_selection() #TODO: remove this function
  return if !@visual_mode #TODO: this should not happen

  _start, _end = get_visual_mode_range
  set_clipboard(self[_start, _end])
  end_visual_mode
end

#delete_line ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1510

def delete_line()
  $method_handles_repeat = true
  num_lines = 1
  if !$next_command_count.nil? and $next_command_count > 0
    num_lines = $next_command_count
    debug "copy num_lines:#{num_lines}"
  end
  lrange = line_range(@lpos, num_lines)
  s = self[lrange]
  add_delta([lrange.begin, DELETE, lrange.end - lrange.begin + 1], true)
  set_clipboard(s)
  update_pos(lrange.begin)
  $paste_lines = true
  #recalc_line_ends
end

#delete_range(startpos, endpos) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 907

def delete_range(startpos, endpos)
  #s = self.slice!(startpos..endpos)
  set_clipboard(self[startpos..endpos])
  add_delta([startpos, DELETE, (endpos - startpos + 1)], true)
  #recalc_line_ends
  calculate_line_and_column_pos
end

#detect_file_language ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 102

def detect_file_language
  @lang = nil
  @lang = "c" if @fname.match(/\.(c|h|cpp)$/)
  @lang = "java" if @fname.match(/\.(java)$/)
  @lang = "ruby" if @fname.match(/\.(rb)$/)
  @lang = "hyperplaintext" if @fname.match(/\.(txt)$/)
  @lang = "php" if @fname.match(/\.(php)$/)

  lm = GtkSource::LanguageManager.new

  lm.set_search_path(lm.search_path << ppath("lang/"))
  lang = lm.guess_language(@fname)
  # lang.get_metadata("line-comment-start")
  # lang.get_metadata("block-comment-start")
  # lang.get_metadata("block-comment-end")
  @lang_nfo = lang
  if !lang.nil? and !lang.id.nil?
    debug "Guessed LANG: #{lang.id}"
    @lang = lang.id
  end

  if @lang
    gui_set_file_lang(@id, @lang)
  end
end

#end_visual_mode ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1634

def end_visual_mode()
  debug "End visual mode"
  #TODO:take previous mode (insert|command) from stack?
  $kbd.set_mode(:command)
  @visual_mode = false
  return true
end

#execute_current_line_in_terminal(autoclose = false) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1369

def execute_current_line_in_terminal(autoclose = false)
  s = get_current_line
  exec_in_terminal(s, autoclose)
end

#get_com_str ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 552

def get_com_str()
  # return nil if @syntax_detect_failed

  com_str = nil
  # if get_file_type() == "c" or get_file_type() == "java"
  # com_str = "//"
  # elsif get_file_type() == "ruby"
  # com_str = "#"
  # else
  # com_str = "//"
  # end

  if !@lang_nfo.nil?
    com_str = @lang_nfo.get_metadata("line-comment-start")
  end

  # lang.get_metadata("block-comment-start")
  # lang.get_metadata("block-comment-end")

  com_str = "//" if com_str.nil?

  return com_str
end

#get_cur_nonwhitespace_word ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1134

def get_cur_nonwhitespace_word()
  wem = scan_marks(@pos, @pos + 200, /(?<=\S)\s/, -1)
  wsm = scan_marks(@pos - 200, @pos, /((?<=\s)\S)|^\S/)

  word_start = wsm[-1]
  word_end = wem[0]
  word_start = pos if word_start == nil
  word_end = pos if word_end == nil
  word = self[word_start..word_end]
  debug "'WORD: #{word}'"
  # message("Open link #{word}")
  linep = get_file_line_pointer(word)
  debug "linep'#{linep}'"
  path = File.expand_path(word)
  wtype = nil
  if is_url(word)
    wtype = :url
  elsif is_existing_file(path)
    message("PATH:'#{word}'")
    if vma.can_open_extension?(path)
      wtype = :textfile
    else
      wtype = :file
    end
    # elsif hpt_check_cur_word(word) #TODO: check only
    # debug word
  elsif linep != nil
    wtype = :linepointer
    word = linep
  elsif m = word.match(/⟦help:(.*)⟧/)
    return [m[1], :help]
  else
    fn = hpt_check_cur_word(word)
    if !fn.nil?
      return [fn, :hpt_link]
    end
  end
  return [word, wtype]
end

#get_current_line ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1647

def get_current_line
  s = self[line_range(@lpos, 1)]
  return s
end

#get_current_selection ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1652

def get_current_selection()
  return "" if !@visual_mode
  return self[get_visual_mode_range]
end

#get_file_type ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 204

def get_file_type()
  return @lang
end

#get_line_and_col_pos(pos) ⇒ Object

Calculate the two dimensional column and line positions based on (one dimensional) position in the buffer.



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# File 'lib/vimamsa/buffer.rb', line 817

def get_line_and_col_pos(pos)
  pos = self.size if pos > self.size
  pos = 0 if pos < 0

  lpos = get_line_pos(pos)

  lpos = @line_ends.size if lpos == nil
  cpos = pos
  cpos -= @line_ends[lpos - 1] + 1 if lpos > 0

  return [lpos, cpos]
end

#get_line_end(pos) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 625

def get_line_end(pos)
  return @line_ends.select { |x| x > pos }.min
end

#get_line_pos(pos) ⇒ Object

Get the line number of character position



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# File 'lib/vimamsa/buffer.rb', line 810

def get_line_pos(pos)
  lpos = @line_ends.bsearch_index { |x, _| x >= pos }
  return lpos
end

#get_line_start(pos) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 592

def get_line_start(pos)

  # Bsearch: https://www.rubydoc.info/stdlib/core/Array#bsearch-instance_method
  # In find-minimum mode (this is a good choice for typical use case), the block must return true or false, and there must be an index i (0 <= i <= ary.size) so that:
  # the block returns false for any element whose index is less than i, and
  # the block returns true for any element whose index is greater than or equal to i.
  # This method returns the i-th element. If i is equal to ary.size, it returns nil.

  # (OLD) slower version:
  # ls = @line_ends.select { |x| x < pos }.max
  a = @line_ends.bsearch_index { |x| x >= pos }

  a = @line_ends[-1] if a == nil
  a = 0 if a == nil
  if a > 0
    a = a - 1
  else
    a = 0
  end
  ls = nil
  ls = @line_ends[a] if a != nil
  # if a != nil and ls != @line_ends[a]
  # debug "NO MATCH @line_ends[a]"
  # end

  if ls == nil
    ls = 0
  else
    ls = ls + 1
  end
  return ls
end

#get_range(range_id) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 915

def get_range(range_id)
  range = nil
  if range_id == :to_word_end
    wmarks = get_word_end_marks(@pos, @pos + 150)
    if wmarks.any?
      range = @pos..wmarks[0]
    end
  elsif range_id == :to_line_end
    debug "TO LINE END"
    range = @pos..(@line_ends[@lpos] - 1)
  elsif range_id == :to_line_start
    debug "TO LINE START: #{@lpos}"

    if @cpos == 0
      range = nil
    else
      if @lpos == 0
        startpos = 0
      else
        startpos = @line_ends[@lpos - 1] + 1
      end
      endpos = @pos - 1
      range = startpos..endpos
    end
    # range = startpos..(@pos - 1)
  else
    crash("INVALID RANGE")
  end
  return range if range == nil
  if range.last < range.first
    range.last = range.first
  end
  if range.first < 0
    range.first = 0
  end
  if range.last >= self.size
    range.last = self.size - 1
  end
  #TODO: sanity check
  return range
end

#get_repeat_num ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 652

def get_repeat_num()
  $method_handles_repeat = true
  repeat_num = 1
  if !$next_command_count.nil? and $next_command_count > 0
    repeat_num = $next_command_count
  end
  return repeat_num
end

#get_short_path ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 328

def get_short_path()
  fpath = self.fname
  if fpath.size > 50
    fpath = fpath[-50..-1]
  end
  return fpath
end

#get_visual_mode_range ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1657

def get_visual_mode_range()
  _start = @selection_start
  _end = @pos

  _start, _end = _end, _start if _start > _end
  _end = _end + 1 if _start < _end

  return _start..(_end - 1)
end

#get_visual_mode_range2 ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1642

def get_visual_mode_range2()
  r = get_visual_mode_range
  return [r.begin, r.end]
end

#get_word_end_marks(startpos, endpos) ⇒ Object

Get positions of last characters in words



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# File 'lib/vimamsa/buffer.rb', line 1036

def get_word_end_marks(startpos, endpos)
  startpos = 0 if startpos < 0
  endpos = self.size if endpos > self.size
  search_str = self[(startpos)..(endpos)]
  return if search_str == nil
  wsmarks = scan_indexes(search_str, /(?<=\p{Word})[^\p{Word}]/)
  wsmarks = wsmarks.collect { |x| x + startpos - 1 }
  return wsmarks
end

#get_word_start_marks(startpos, endpos) ⇒ Object

Get positions of first characters in words



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# File 'lib/vimamsa/buffer.rb', line 1047

def get_word_start_marks(startpos, endpos)
  startpos = 0 if startpos < 0
  endpos = self.size if endpos > self.size
  search_str = self[(startpos)..(endpos)]
  return if search_str == nil
  wsmarks = scan_indexes(search_str, /(?<=[^\p{Word}])\p{Word}/)
  wsmarks = wsmarks.collect { |x| x + startpos }
  return wsmarks
end

#handle_drag_and_drop(fname) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 190

def handle_drag_and_drop(fname)
  debug "[buffer] Dropped file: #{fname}"
  if is_image_file(fname)
    debug "Dropped image file"
    insert_image_after_current_line(fname)
  elsif vma.can_open_extension?(fname)
    debug "Dropped text file"
    open_new_file(fname)
  else
    debug "Dropped unknown file format"
  end
  # add_image(imgpath, pos)
end

#handle_line_action ⇒ Object

Activated when enter/return pressed



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# File 'lib/vimamsa/buffer.rb', line 1124

def handle_line_action()
  if line_action_handler.class == Proc
    # Custom handler
    line_action_handler.call(lpos)
  else
    # Generic default action
    cur_nonwhitespace_word_action()
  end
end

#handle_word(wnfo) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1067

def handle_word(wnfo)
  word = wnfo[0]
  wtype = wnfo[1]
  if wtype == :url
    open_url(word)
  elsif wtype == :linepointer
    jump_to_file(word[0], word[1], word[2])
  elsif wtype == :textfile
    open_existing_file(word)
  elsif wtype == :file
    open_with_default_program(word)
  elsif wtype == :hpt_link
    open_existing_file(word)
  elsif wtype == :help
    if word == "keybindings"
      call_action(:show_key_bindings)
    end
  else
    #TODO
  end
end

#indent ⇒ Object

Indents whole buffer using external program



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# File 'lib/vimamsa/buffer.rb', line 1746

def indent()
  file = Tempfile.new("out")
  infile = Tempfile.new("in")
  file.write(self.to_s)
  file.flush
  bufc = "FOO"

  tmppos = @pos

  message("Auto format #{@fname}")

  if ["chdr", "c", "cpp"].include?(get_file_type())

    #C/C++/Java/JavaScript/Objective-C/Protobuf code
    system("clang-format -style='{BasedOnStyle: LLVM, ColumnLimit: 100,  SortIncludes: false}' #{file.path} > #{infile.path}")
    bufc = IO.read(infile.path)
  elsif get_file_type() == "Javascript"
    cmd = "clang-format #{file.path} > #{infile.path}'"
    debug cmd
    system(cmd)
    bufc = IO.read(infile.path)
  elsif get_file_type() == "ruby"
    cmd = "rufo #{file.path}"
    debug cmd
    system(cmd)
    bufc = IO.read(file.path)
  else
    return
  end
  self.update_content(bufc)
  center_on_current_line #TODO: needed?
  file.close; file.unlink
  infile.close; infile.unlink
end

#insert_image_after_current_line(fname) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 179

def insert_image_after_current_line(fname)
  lr = current_line_range()
  a = "⟦img:#{fname}⟧\n"
  b = " \n"
  txt = a + b
  insert_txt_at(txt, lr.end + 1)
  buf.view.handle_deltas
  imgpos = lr.end + 1 + a.size
  add_image(fname, imgpos)
end

#insert_new_line ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1374

def insert_new_line()
  s = get_current_line
  $hook.call(:insert_new_line, s)
  insert_txt("\n")
  # message("foo")
end

#insert_txt(c, mode = BEFORE) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1381

def insert_txt(c, mode = BEFORE)
  # start_profiler
  #Sometimes we get ASCII-8BIT although actually UTF-8  "incompatible character encodings: UTF-8 and ASCII-8BIT (Encoding::CompatibilityError)"
  c = c.force_encoding("UTF-8");  #TODO:correct?

  c = "\n" if c == "\r"
  if $cnf[:indent_based_on_last_line] and c == "\n" and @lpos > 0
    # Indent start of new line based on last line
    last_line = line(@lpos)
    m = /^( +)([^ ]+|$)/.match(last_line)
    if m
      c = c + " " * m[1].size if m
    end

    #if tab indent
    m = /^(\t+)([^\t]+|$)/.match(last_line)
    if m
      c = c + "\t" * m[1].size if m
    end

    # debug m.inspect
  end
  if mode == BEFORE
    insert_pos = @pos
    @pos += c.size
  elsif mode == AFTER
    insert_pos = @pos + 1
  else
    return
  end

  #self.insert(insert_pos,c)
  add_delta([insert_pos, INSERT, c.size, c], true)
  #debug("encoding: #{c.encoding}")
  #debug "c.size: #{c.size}"
  #recalc_line_ends #TODO: optimize?
  calculate_line_and_column_pos
  #need_redraw!
  #@pos += c.size
  # end_profiler
end

#insert_txt_at(c, pos) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1362

def insert_txt_at(c, pos)
  c = c.force_encoding("UTF-8");  #TODO:correct?
  c = "\n" if c == "\r"
  add_delta([pos, INSERT, c.size, c], true)
  calculate_line_and_column_pos
end

#is_delta_ok(delta) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 354

def is_delta_ok(delta)
  ret = true
  pos = delta[0]
  if pos < 0
    ret = false
    debug "pos=#{pos} < 0"
  elsif pos > self.size
    debug "pos=#{pos} > self.size=#{self.size}"
    ret = false
  end
  if ret == false
    # crash("DELTA OK=#{ret}")
  end
  return ret
end

#is_legal_pos(pos, op = :read) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 156

def is_legal_pos(pos, op = :read)
  return false if pos < 0
  if op == :add
    return false if pos > self.size
  elsif op == :read
    return false if pos >= self.size
  end
  return true
end

#join_lines ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1316

def join_lines()
  if @lpos >= @line_ends.size - 1 # Cursor is on last line
    debug("ON LAST LINE")
    return
  else
    # TODO: replace all whitespace between lines with ' '
    jump(END_OF_LINE)
    delete(CURRENT_CHAR_FORWARD)
    #insert_txt(' ',AFTER)
    insert_txt(" ", BEFORE)
  end
end

#jump(target) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1264

def jump(target)
  if target == START_OF_BUFFER
    set_pos(0)
  end
  if target == END_OF_BUFFER
    set_pos(self.size - 1)
  end
  if target == BEGINNING_OF_LINE
    @cpos = 0
    calculate_pos_from_cpos_lpos
  end
  if target == END_OF_LINE
    @cpos = line(@lpos).size - 1
    calculate_pos_from_cpos_lpos
  end

  if target == FIRST_NON_WHITESPACE
    l = current_line()
    debug l.inspect
    @cpos = line(@lpos).size - 1
    a = scan_indexes(l, /\S/)
    debug a.inspect
    if a.any?
      @cpos = a[0]
    else
      @cpos = 0
    end
    calculate_pos_from_cpos_lpos
  end
end

#jump_to_last_edit ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 481

def jump_to_last_edit()
  return if @edit_pos_history.empty?
  @edit_pos_history_i += 1

  if @edit_pos_history_i > @edit_pos_history.size
    @edit_pos_history_i = 0
  end

  #        if @edit_pos_history.size >= @edit_pos_history_i
  set_pos(@edit_pos_history[-@edit_pos_history_i])
  center_on_current_line
  return true
  #        end
end

#jump_to_line(line_n = 1) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1295

def jump_to_line(line_n = 1)

  #    $method_handles_repeat = true
  #    if !$next_command_count.nil? and $next_command_count > 0
  #        line_n = $next_command_count
  #        debug "jump to line:#{line_n}"
  #    end
  debug "jump to line:#{line_n}"
  line_n = get_repeat_num() if line_n == 1

  if line_n > @line_ends.size
    debug("lpos too large") #TODO
    return
  end
  if line_n == 1
    set_pos(0)
  else
    set_pos(@line_ends[line_n - 2] + 1)
  end
end

#jump_to_mark(mark_char) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1257

def jump_to_mark(mark_char)
  p = @marks[mark_char]
  set_pos(p) if p
  center_on_current_line
  return true
end

#jump_to_next_edit ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 496

def jump_to_next_edit()
  return if @edit_pos_history.empty?
  @edit_pos_history_i -= 1
  @edit_pos_history_i = @edit_pos_history.size - 1 if @edit_pos_history_i < 0
  debug "@edit_pos_history_i=#{@edit_pos_history_i}"
  set_pos(@edit_pos_history[-@edit_pos_history_i])
  center_on_current_line
  return true
end

#jump_to_next_instance_of_char(char, direction = FORWARD) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1329

def jump_to_next_instance_of_char(char, direction = FORWARD)

  #return if at_end_of_line?
  if direction == FORWARD
    position_of_next_char = self.index(char, @pos + 1)
    if position_of_next_char != nil
      @pos = position_of_next_char
    end
  elsif direction == BACKWARD
    start_search = @pos - 250
    start_search = 0 if start_search < 0
    search_substr = self[start_search..(@pos - 1)]
    _pos = search_substr.reverse.index(char)
    if _pos != nil
      @pos -= (_pos + 1)
    end
  end
  m = method("jump_to_next_instance_of_char")
  set_last_command({ method: m, params: [char, direction] })
  $last_find_command = { char: char, direction: direction }
  set_pos(@pos)
end

#jump_to_next_instance_of_word ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1181

def jump_to_next_instance_of_word()
  if $kbd.last_action == $kbd.cur_action and @current_word != nil
    # debug "REPEATING *"
  else
    start_search = [@pos - 150, 0].max

    search_str1 = self[start_search..(@pos)]
    wsmarks = scan_indexes(search_str1, /(?<=[^\p{Word}])\p{Word}/)
    a = wsmarks[-1]
    a = 0 if a == nil

    search_str2 = self[(@pos)..(@pos + 150)]
    wemarks = scan_indexes(search_str2, /(?<=\p{Word})[^\p{Word}]/)
    b = wemarks[0]
    word_start = (@pos - search_str1.size + a + 1)
    word_start = 0 if !(word_start >= 0)
    @current_word = self[word_start..(@pos + b - 1)]
  end

  #TODO: search for /[^\p{Word}]WORD[^\p{Word}]/
  position_of_next_word = self.index(@current_word, @pos + 1)
  if position_of_next_word != nil
    set_pos(position_of_next_word)
  else #Search from beginning
    position_of_next_word = self.index(@current_word)
    set_pos(position_of_next_word) if position_of_next_word != nil
  end
  center_on_current_line
  return true
end

#jump_to_pos(new_pos) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 795

def jump_to_pos(new_pos)
  set_pos(new_pos)
end

#jump_to_random_pos ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 506

def jump_to_random_pos()
  set_pos(rand(self.size))
end

#jump_word(direction, wordpos) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1212

def jump_word(direction, wordpos)
  offset = 0
  if direction == FORWARD
    debug "POS: #{@pos},"
    search_str = self[(@pos)..(@pos + 250)]
    return if search_str == nil
    if wordpos == WORD_START # vim 'w'
      wsmarks = scan_indexes(search_str, /(?<=[^\p{Word}])\p{Word}|\Z/) # \Z = end of string, just before last newline.
      wsmarks2 = scan_indexes(search_str, /\n[ \t]*\n/) # "empty" lines that have whitespace
      wsmarks2 = wsmarks2.collect { |x| x + 1 }
      wsmarks = (wsmarks2 + wsmarks).sort.uniq
      offset = 0
      if wsmarks.any?
        next_pos = @pos + wsmarks[0] + offset
        set_pos(next_pos)
      end
    elsif wordpos == WORD_END
      search_str = self[(@pos + 1)..(@pos + 150)]
      wsmarks = scan_indexes(search_str, /(?<=\p{Word})[^\p{Word}]/)
      offset = -1
      if wsmarks.any?
        next_pos = @pos + 1 + wsmarks[0] + offset
        set_pos(next_pos)
      end
    end
  end
  if direction == BACKWARD #  vim 'b'
    start_search = @pos - 150 #TODO 150 length limit
    start_search = 0 if start_search < 0
    search_str = self[start_search..(@pos - 1)]
    return if search_str == nil
    wsmarks = scan_indexes(search_str,
                           #/(^|(\W)\w|\n)/) #TODO 150 length limit
                           #/^|(?<=[^\p{Word}])\p{Word}|(?<=\n)\n/) #include empty lines?
                           /\A|(?<=[^\p{Word}])\p{Word}/) # Start of string or nonword,word.

    offset = 0

    if wsmarks.any?
      next_pos = start_search + wsmarks.last + offset
      set_pos(next_pos)
    end
  end
end

#line(lpos) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 336

def line(lpos)
  if @line_ends.size == 0
    return self
  end

  #TODO: implement using line_range()
  if lpos >= @line_ends.size
    debug("lpos too large") #TODO
    return ""
  elsif lpos == @line_ends.size
  end
  start = @line_ends[lpos - 1] + 1 if lpos > 0
  start = 0 if lpos == 0
  _end = @line_ends[lpos]
  debug "start: _#{start}, end: #{_end}"
  return self[start.._end]
end

#line_range(start_line, num_lines, include_last_nl = true) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 681

def line_range(start_line, num_lines, include_last_nl = true)
  end_line = start_line + num_lines - 1
  if end_line >= @line_ends.size
    debug("lpos too large") #TODO
    end_line = @line_ends.size - 1
  end
  start = @line_ends[start_line - 1] + 1 if start_line > 0
  start = 0 if start_line == 0
  if include_last_nl
    _End = @line_ends[end_line]
  else
    _End = @line_ends[end_line] - 1
  end
  _End = start if _End < start
  debug "line range: start=#{start}, end=#{_End}"
  return start.._End
end

#list_str ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 77

def list_str()
  if @fname.nil?
    x = @title
  else
    x = @fname
  end
  return x
end

#mark_current_position(mark_char) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1031

def mark_current_position(mark_char)
  @marks[mark_char] = @pos
end

#move(direction) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 961

def move(direction)
  debug "cpos:#{@cpos} lpos:#{@lpos} @larger_cpos:#{@larger_cpos}"
  if direction == :forward_page
    debug "FORWARD PAGE"
    visible_range = get_visible_area()
    set_pos(visible_range[1])
    top_where_cursor()
  end
  if direction == :backward_page
    debug "backward PAGE"
    visible_range = get_visible_area()
    set_pos(visible_range[0])
    bottom_where_cursor()
  end

  if direction == FORWARD_CHAR
    return if @pos >= self.size - 1
    set_pos(@pos + 1)
  end
  if direction == BACKWARD_CHAR
    set_pos(@pos - 1)
  end
  if direction == FORWARD_LINE
    if @lpos >= @line_ends.size - 1 # Cursor is on last line
      debug("ON LAST LINE")
      return
    else
      @lpos += 1
    end
  end
  if direction == BACKWARD_LINE
    if @lpos == 0 # Cursor is on first line
      return
    else
      @lpos -= 1
    end
  end

  if direction == FORWARD_CHAR or direction == BACKWARD_CHAR
    reset_larger_cpos
  end

  if direction == BACKWARD_LINE or direction == FORWARD_LINE
    if @lpos > 0
      new_pos = @line_ends[@lpos - 1] - 1
    else
      new_pos = 0
    end

    _line = self.line(@lpos)
    if @cpos > (_line.size - 1)
      debug("$cpos too large: #{@cpos} #{@lpos}")
      if @larger_cpos < @cpos
        @larger_cpos = @cpos
      end
      @cpos = line(@lpos).size - 1
    end

    if @larger_cpos > @cpos and @larger_cpos < (_line.size)
      @cpos = @larger_cpos
    elsif @larger_cpos > @cpos and @larger_cpos >= (_line.size)
      @cpos = line(@lpos).size - 1
    end

    #new_pos += @cpos
    #@pos = new_pos
    calculate_pos_from_cpos_lpos(false)
  end
end

#need_redraw! ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1454

def need_redraw!
  @need_redraw = true
end

#need_redraw? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vimamsa/buffer.rb', line 1458

def need_redraw?
  return @need_redraw
end

#paste(at = AFTER, register = nil) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1473

def paste(at = AFTER, register = nil)
  # Paste after current char. Except if at end of line, paste before end of line.
  text = ""
  if register.nil?
    text = paste_system_clipboard
  end

  if text == ""
    return if !$clipboard.any?
    if register == nil
      text = $clipboard[-1]
    else
      text = $register[register]
    end
  end
  debug "PASTE: #{text}"

  return if text == ""

  if $paste_lines
    debug "PASTE LINES"
    put_to_new_next_line(text)
  else
    if at_end_of_buffer? or at_end_of_line? or at == BEFORE
      pos = @pos
    else
      pos = @pos + 1
    end
    insert_txt_at(text, pos)
    set_pos(pos + text.size)
  end
  set_pos(@pos)
  #TODO: AFTER does not work
  #insert_txt($clipboard[-1],AFTER)
  #recalc_line_ends #TODO: bug when run twice?
end

#put_file_path_to_clipboard ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1622

def put_file_path_to_clipboard
  set_clipboard(self.fname)
end

#put_to_new_next_line(txt) ⇒ Object

Create a new line after current line and insert text on that line



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# File 'lib/vimamsa/buffer.rb', line 1467

def put_to_new_next_line(txt)
  l = current_line_range()
  insert_txt_at(txt, l.end + 1)
  set_pos(l.end + 1)
end

#recalc_line_ends ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 708

def recalc_line_ends()
  t1 = Time.now
  leo = @line_ends.clone
  @line_ends = scan_indexes(self, /\n/)
  if @line_ends == leo
    debug "No change to line ends"
  else
    debug "CHANGES to line ends"
  end

  debug "Scan line_end time: #{Time.now - t1}"
  #debug @line_ends
end

#redo ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 530

def redo()
  return if !@redo_stack.any?
  #last_delta = @edit_history[-1].pop
  redo_delta = @redo_stack.pop
  #printf("==== UNDO ====\n")
  debug redo_delta.inspect
  run_delta(redo_delta)
  @edit_history << redo_delta
  set_pos(redo_delta[0])
  #recalc_line_ends #TODO: optimize?
  calculate_line_and_column_pos
end

#replace_range(range, text) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 671

def replace_range(range, text)
  delete_range(range.first, range.last)
  insert_txt_at(text, range.begin)
end

#replace_with_char(char) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1352

def replace_with_char(char)
  debug "self_pos:'#{self[@pos]}'"
  return if self[@pos] == "\n"
  d1 = [@pos, DELETE, 1]
  d2 = [@pos, INSERT, 1, char]
  add_delta(d1, true)
  add_delta(d2, true)
  debug "DELTAS:#{self.deltas.inspect} "
end

#reset_larger_cpos ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 957

def reset_larger_cpos()
  @larger_cpos = @cpos
end

#revert ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 208

def revert()
  return if !@fname
  return if !File.exists?(@fname)
  message("Revert buffer #{@fname}")
  str = read_file("", @fname)
  self.set_content(str)
end

#run_delta(delta, auto_update_cpos = false) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 402

def run_delta(delta, auto_update_cpos = false)
  # auto_update_cpos: In some cases position of cursor should be updated automatically based on change to buffer (delta). In other cases this is handled by the action that creates the delta.

  if $experimental
    @bt.handle_delta(Delta.new(delta[0], delta[1], delta[2], delta[3]))
  end
  pos = delta[0]
  if @edit_pos_history.any? and (@edit_pos_history.last - pos).abs <= 2
    @edit_pos_history.pop
  end

  lsp = get_line_start(pos)

  if @edit_pos_history[-1] != lsp
    @edit_pos_history << lsp
  end
  @edit_pos_history_i = 0

  if delta[1] == DELETE
    delta[3] = self.slice!(delta[0], delta[2])
    @deltas << delta
    update_index(pos, -delta[2])
    update_line_ends(pos, -delta[2], delta[3])
    update_highlights(pos, -delta[2], delta[3])
    update_cursor_pos(pos, -delta[2]) if auto_update_cpos

    @update_hl_startpos = pos - delta[2]
    @update_hl_endpos = pos
    add_hl_update(@update_hl_startpos, @update_hl_endpos)
  elsif delta[1] == INSERT
    self.insert(delta[0], delta[3])
    @deltas << delta
    debug [pos, +delta[2]].inspect
    update_index(pos, +delta[2])
    update_cursor_pos(pos, +delta[2]) if auto_update_cpos
    update_line_ends(pos, +delta[2], delta[3])
    update_highlights(pos, +delta[2], delta[3])

    @update_hl_startpos = pos
    @update_hl_endpos = pos + delta[2]
    add_hl_update(@update_hl_startpos, @update_hl_endpos)
  end
  debug "DELTA=#{delta.inspect}"
  # sanity_check_line_ends #TODO: enable with debug mode
  #highlight_c()

  $update_highlight = true
  @update_highlight = true

  return delta
end

#sanity_check_line_ends ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 722

def sanity_check_line_ends()
  leo = @line_ends.clone
  @line_ends = scan_indexes(self, /\n/)
  if @line_ends == leo
    debug "No change to line ends"
  else
    debug "CHANGES to line ends"
    debug leo.inspect
    debug @line_ends.inspect
    crash("CHANGES to line ends")
  end
end

#sanitycheck_btree ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 226

def sanitycheck_btree()
  # lines = self.split("\n")

  lines = self.scan(/([^\n]*\n)/).flatten

  i = 0
  ok = true
  @bt.each_line { |r|
    if lines[i] != r #or true
      debug "NO MATCH FOR LINE:"
      debug "i=#{i}["
      # debug "[orig]pos=#{leaf.pos} |#{leaf.data}|"
      # debug "spos=#{spos} nchar=#{leaf.nchar} epos=#{epos} a[]=\nr=|#{r}|"
      debug "fromtree:|#{r}|"
      debug "frombuf:|#{lines[i]}"
      debug "]"
      ok = false
    end
    i += 1
  }

  debug "BT: NO ERRORS" if ok
  debug "BT: ERRORS" if !ok
end

#save ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1736

def save()
  if !@fname
    save_as()
    return
  end
  message("Saving file #{@fname}")
  write_contents_to_file(@fname)
end

#save_as ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1680

def save_as()
  debug "save_as"
  savepath = ""

  # If current file has fname, save to that fname
  # Else search for previously open files and save to the directory of
  # the last viewed file that has a filename
  # selffers[$buffer_history.reverse[1]].fname

  if @fname
    savepath = File.dirname(@fname)
  else
    savepath = buflist.get_last_dir
  end
  gui_file_saveas(savepath)
  # calls back to file_saveas
end

#save_as_callback(fpath) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1698

def save_as_callback(fpath)
  set_filename(fpath)
  save()
  gui_set_window_title(@title, @subtitle) #TODO: if not active buffer?
end

#scan_marks(startpos, endpos, regstr, offset = 0) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1057

def scan_marks(startpos, endpos, regstr, offset = 0)
  startpos = 0 if startpos < 0
  endpos = self.size if endpos > self.size
  search_str = self[(startpos)..(endpos)]
  return if search_str == nil
  marks = scan_indexes(search_str, regstr)
  marks = marks.collect { |x| x + startpos + offset }
  return marks
end

#selection_start ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1667

def selection_start()
  return -1 if !@visual_mode
  return @selection_start if @visual_mode
end

#set_active ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 86

def set_active
  if !@active_kbd_mode.nil?
    $kbd.set_mode(@active_kbd_mode)
  else
    $kbd.set_mode_to_default
  end
  # gui_set_current_buffer(@id)
end

#set_content(str) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 251

def set_content(str)
  @encrypted_str = nil
  @gui_update_highlight = true
  @ftype = nil
  if str[0..10] == "VMACRYPT001"
    @encrypted_str = str[11..-1]
    callback = proc { |x| decrypt_cur_buffer(x) }
    gui_one_input_action("Decrypt", "Password:", "decrypt", callback, { :hide => true })
    str = "ENCRYPTED"
  else
    # @crypt = nil
  end

  if (str[-1] != "\n")
    str << "\n"
  end

  self.replace(str)
  @line_ends = scan_indexes(self, /\n/)

  # @bt = BufferTree.new(str)
  if $experimental
    @bt = BufferTree.new(self)
    if $debug
      sanitycheck_btree()
    end
  end

  @last_update = Time.now - 10
  debug("line_ends")
  @marks = Hash.new
  @basename = ""
  @pathname = Pathname.new(fname) if @fname
  @basename = @pathname.basename if @fname
  @pos = 0 # Position in whole file
  @cpos = 0 # Column position on current line
  @lpos = 0 # Number of current line
  @edit_version = 0 # +1 for every buffer modification
  @larger_cpos = 0 # Store @cpos when move up/down to shorter line than @cpos
  @need_redraw = 1
  @call_func = nil
  @deltas = []
  @edit_history = []
  @redo_stack = []
  @edit_pos_history = []
  @edit_pos_history_i = 0
  # @highlights = {}
  @highlights.delete_if { |x| true }

  @syntax_parser = nil

  @is_highlighted = false
  @update_highlight = true
  @update_hl_startpos = 0 #TODO
  @update_hl_endpos = self.size - 1

  gui_set_buffer_contents(@id, self.to_s)
  @images = [] #TODO: if reload
  hpt_scan_images(self)

  # add_hl_update(@update_hl_startpos, @update_hl_endpos)
end

#set_encrypted(password) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 166

def set_encrypted(password)
  @crypt = Encrypt.new(password)
  message("Set buffer encrypted")
end

#set_executable ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 95

def set_executable
  if File.exists?(@fname)
    FileUtils.chmod("+x", @fname)
    message("Set executable: #{@fname}")
  end
end

#set_filename(filename) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 314

def set_filename(filename)
  @fname = filename
  @pathname = Pathname.new(fname) if @fname
  @basename = @pathname.basename if @fname

  @title = File.basename(@fname)
  @dirname = File.dirname(@fname)
  userhome = File.expand_path("~")
  @subtitle = @dirname.gsub(/^#{userhome}/, "~")
  vma.buffers.last_dir = @dirname

  detect_file_language
end

#set_line_and_column_pos(lpos, cpos, _reset_larger_cpos = true) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 835

def set_line_and_column_pos(lpos, cpos, _reset_larger_cpos = true)
  @lpos = lpos if !lpos.nil?
  @cpos = cpos if !cpos.nil?
  if @lpos > 0
    new_pos = @line_ends[@lpos - 1] + 1
  else
    new_pos = 0
  end

  if @cpos > (line(@lpos).size - 1)
    debug("$cpos too large: #{@cpos} #{@lpos}")
    if @larger_cpos < @cpos
      @larger_cpos = @cpos
    end
    @cpos = line(@lpos).size - 1
  end
  new_pos += @cpos
  set_pos(new_pos)
  reset_larger_cpos if _reset_larger_cpos
end

#set_line_style(op) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1592

def set_line_style(op)
  lrange = line_range(@lpos, 1, false)
  txt = self[lrange]
  # txt = "◼ " + txt if op == :heading
  txt = "⦁" + txt + "⦁" if op == :bold
  txt = "❙" + txt + "❙" if op == :title
  txt.gsub!(/◼ /, "") if op == :clear
  txt.gsub!(/[❙◼⟦⟧⦁]/, "") if op == :clear or [:h1, :h2, :h3, :h4].include?(op)

  if [:h1, :h2, :h3, :h4].include?(op)
    txt.strip!
    txt = "◼ " + txt if op == :h1
    txt = "◼◼ " + txt if op == :h2
    txt = "◼◼◼ " + txt if op == :h3
    txt = "◼◼◼◼ " + txt if op == :h4
  end
  replace_range(lrange, txt)
end

#set_pos(new_pos) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 799

def set_pos(new_pos)
  if new_pos >= self.size
    @pos = self.size - 1 # TODO:??right side of last char
  elsif new_pos >= 0
    @pos = new_pos
  end
  gui_set_cursor_pos(@id, @pos)
  calculate_line_and_column_pos
end

#set_redrawed ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1462

def set_redrawed
  @need_redraw = false
end

#set_unencrypted ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 171

def set_unencrypted()
  @crypt = nil
end

#start_visual_mode ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1531

def start_visual_mode()
  @visual_mode = true
  @selection_start = @pos
  $kbd.set_mode(:visual)
end

#style_transform(op) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1578

def style_transform(op)
  return if !@visual_mode
  r = get_visual_mode_range
  #TODO: if txt[-1]=="\n"
  txt = self[r]
  txt = "⦁" + txt + "⦁" if op == :bold
  txt = "⟦" + txt + "⟧" if op == :link
  txt = "❙" + txt + "❙" if op == :title
  txt.gsub!(/[❙◼⟦⟧⦁]/, "") if op == :clear

  replace_range(r, txt)
  end_visual_mode
end

#transform_selection(op) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1554

def transform_selection(op)
  return if !@visual_mode
  r = get_visual_mode_range
  txt = self[r]
  txt.upcase! if op == :upcase
  txt.downcase! if op == :downcase
  txt.gsub!(/\w+/, &:capitalize) if op == :capitalize
  txt.swapcase! if op == :swapcase
  txt.reverse! if op == :reverse

  replace_range(r, txt)
  end_visual_mode
end

#uncomment_linerange(r) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 644

def uncomment_linerange(r)
  com_str = get_com_str()
  #r=self.line_range(self.lpos, 2)
  lines = self[r].split(/(\n)/).each_slice(2).map { |x| x[0] }
  mod = lines.collect { |x| x.sub(/^(\s*)(#{com_str}\s?)/, '\1') + "\n" }.join()
  replace_range(r, mod)
end

#undo ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 510

def undo()
  debug @edit_history.inspect
  return if !@edit_history.any?
  last_delta = @edit_history.pop
  @redo_stack << last_delta
  debug last_delta.inspect
  if last_delta[1] == DELETE
    d = [last_delta[0], INSERT, 0, last_delta[3]]
    run_delta(d)
  elsif last_delta[1] == INSERT
    d = [last_delta[0], DELETE, last_delta[3].size]
    run_delta(d)
  else
    return #TODO: assert?
  end
  set_pos(last_delta[0])
  #recalc_line_ends #TODO: optimize?
  calculate_line_and_column_pos
end

#update_bufpos_on_change(positions, xpos, changeamount) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 735

def update_bufpos_on_change(positions, xpos, changeamount)
  # debug "xpos=#{xpos} changeamount=#{changeamount}"
  positions.collect { |x|
    r = nil
    r = x if x < xpos
    r = x + changeamount if changeamount < 0 && x + changeamount >= xpos
    r = x + changeamount if changeamount > 0 && x >= xpos
    r
  }
end

#update_content(newstr) ⇒ Object

Update buffer contents to newstr Change by taking diff of old/new content



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# File 'lib/vimamsa/buffer.rb', line 1425

def update_content(newstr)
  diff = Differ.diff_by_char(newstr, self.to_s)

  da = diff.get_raw_array

  pos = 0
  posA = 0
  posB = 0
  deltas = []

  for x in da
    if x.class == String
      posA += x.size
      posB += x.size
    elsif x.class == Differ::Change
      if x.insert?
        deltas << [posB, INSERT, x.insert.size, x.insert.clone]
        posB += x.insert.size
      elsif x.delete?
        posA += x.delete.size
        deltas << [posB, DELETE, x.delete.size]
      end
    end
  end
  for d in deltas
    add_delta(d, true, true)
  end
end

#update_cursor_pos(pos, changeamount) ⇒ Object

Update cursor position after change in buffer contents. e.g. after processing with external command like indenter



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# File 'lib/vimamsa/buffer.rb', line 456

def update_cursor_pos(pos, changeamount)
  if @pos > pos + 1 && changeamount > 0
    # @pos is after addition
    set_pos(@pos + changeamount)
  elsif @pos > pos && changeamount < 0 && @pos < pos - changeamount
    # @pos is between removal
    set_pos(pos)
  elsif @pos > pos && changeamount < 0 && @pos >= pos - changeamount
    # @pos is after removal
    set_pos(@pos + changeamount)
  end
end

#update_highlights(pos, changeamount, changestr) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 746

def update_highlights(pos, changeamount, changestr)
  return if !self.is_highlighted # $cnf[:syntax_highlight]
  lpos, cpos = get_line_and_col_pos(pos)
  if @highlights and @highlights[lpos]
    hl = @highlights[lpos]
    hls = hl.collect { |x| x[0] } # highlight range start
    hle = hl.collect { |x| x[1] } # highlight range end
    hls2 = update_bufpos_on_change(hls, cpos, changeamount)
    hle2 = update_bufpos_on_change(hle, cpos, changeamount)
    hlnew = []
    for i in hle.size.times
      if hls2[i] != nil and hle2[i] != nil
        hlnew << [hls2[i], hle2[i], hl[i][2]]
      end
    end
    @highlights[lpos] = hlnew
  end
end

#update_index(pos, changeamount) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 469

def update_index(pos, changeamount)
  # debug "pos #{pos}, changeamount #{changeamount}, @pos #{@pos}"
  @edit_pos_history.collect! { |x| r = x if x <= pos; r = x + changeamount if x > pos; r }
  # TODO: handle between removal case
  for k in @marks.keys
    #            debug "change(?): pos=#{pos}, k=#{k}, #{@marks[k]}, #{changeamount}"
    if @marks[k] > pos
      @marks[k] = @marks[k] + changeamount
    end
  end
end

#update_line_ends(pos, changeamount, changestr) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 765

def update_line_ends(pos, changeamount, changestr)
  if changeamount > -1
    changeamount = changestr.size
    i_nl = scan_indexes(changestr, /\n/)
    i_nl.collect! { |x| x + pos }
  end
  #    debug "change:#{changeamount}"
  #TODO: this is the bottle neck in insert_txt action
  @line_ends.collect! { |x|
    r = nil
    r = x if x < pos
    r = x + changeamount if changeamount < 0 && x + changeamount >= pos
    r = x + changeamount if changeamount > 0 && x >= pos
    r
  }.compact!

  if changeamount > -1 && i_nl.size > 0
    @line_ends.concat(i_nl)
    @line_ends.sort!
  end
end

#update_pos(pos) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1526

def update_pos(pos)
  @pos = pos
  calculate_line_and_column_pos
end

#value ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1676

def value()
  return self.to_s
end

#view ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 128

def view()
  # Get the VSourceView < GtkSource::View object corresponding to this buffer
  return vma.gui.buffers[@id]
end

#visual_mode? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vimamsa/buffer.rb', line 1672

def visual_mode?()
  return @visual_mode
end

#write_contents_to_file(fpath) ⇒ Object 



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# File 'lib/vimamsa/buffer.rb', line 1704

def write_contents_to_file(fpath)
  if @crypt != nil
    mode = "wb+"
    contents = "VMACRYPT001" + @crypt.encrypt(self.to_s)
  else
    mode = "w+"
    contents = self.to_s
  end

  Thread.new {
    begin
      io = File.open(fpath, mode)
      io.set_encoding(self.encoding)
      io.write(contents)
      io.close
    rescue Encoding::UndefinedConversionError => ex
      puts "Encoding::UndefinedConversionError"
      # this might happen when trying to save UTF-8 as US-ASCII
      # so just warn, try to save as UTF-8 instead.
      warn("Saving as UTF-8 because of: #{ex.class}: #{ex}")
      io.rewind

      io.set_encoding(Encoding::UTF_8)
      io.write(contents)
    rescue Errno::EACCES => ex
      message("File #{fpath} not writeable")
      #TODO: show message box
    end
    sleep 3
  }
end