Class: Textbringer::Buffer

Inherits:
Object
  • Object
show all
Extended by:
Enumerable
Defined in:
lib/textbringer/buffer.rb

Defined Under Namespace

Modules: RectangleMethods

Constant Summary collapse

GAP_SIZE = 
256
UNDO_LIMIT = 
1000
UTF8_CHAR_LEN = 
Hash.new(1)
DEFAULT_DETECT_ENCODING = 
->(s) {
  @@auto_detect_encodings.find { |e|
    s.force_encoding(e)
    s.valid_encoding?
  }
}
NKF_DETECT_ENCODING = 
->(s) {
  e = NKF.guess(s)
  case e
  when Encoding::US_ASCII
    if s.ascii_only?
      Encoding::UTF_8
    else
      Encoding::ASCII_8BIT
    end
  when Encoding::ASCII_8BIT
    s.force_encoding(Encoding::UTF_8)
    if s.valid_encoding?
      Encoding::UTF_8
    else
      s.force_encoding(Encoding::ASCII_8BIT)
      Encoding::ASCII_8BIT
    end
  else
    e
  end
}
BYTESPLICE_SUPPORTS_PARTIAL_COPY = 
begin
  (+"foo").bytesplice(0, 2, "bar", 1, 2) == "aro"
rescue NoMethodError, ArgumentError
  false
end
WORD_COMPONENT_REGEXP = 
/\p{Letter}|\p{Number}|\p{M}/
@@auto_detect_encodings = 
[
  Encoding::UTF_8,
  Encoding::EUC_JP,
  Encoding::Windows_31J
]
@@detect_encoding_proc = 
DEFAULT_DETECT_ENCODING
@@table = 
{}
@@list = 
[]
@@current = 
nil
@@minibuffer = 
nil
@@global_mark_ring = 
nil

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(s = +"",, name: nil, file_name: nil, file_encoding: , file_mtime: nil, new_file: true, undo_limit: UNDO_LIMIT, read_only: false) ⇒ Buffer

s might not be copied.



220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
 
# File 'lib/textbringer/buffer.rb', line 220

def initialize(s = +"", name: nil,
               file_name: nil,
               file_encoding: CONFIG[:default_file_encoding],
               file_mtime: nil, new_file: true, undo_limit: UNDO_LIMIT,
               read_only: false)
  set_contents(s, file_encoding)
  @name = name
  @file_name = file_name
  self.file_encoding = file_encoding
  @file_mtime = file_mtime
  @new_file = new_file
  @undo_limit = undo_limit
  @point = 0
  @gap_start = 0
  @gap_end = 0
  @marks = []
  @mark = nil
  @mark_ring = Ring.new(CONFIG[:mark_ring_max],
                        on_delete: ->(mark) { mark.delete })
  @current_line = 1
  @current_column = 1  # One-based character count
  @goal_column = nil   # Zero-based display width count
  @undo_stack = []
  @redo_stack = []
  @undoing = false
  @composite_edit_level = 0
  @composite_edit_actions = []
  @version = 0
  @modified = false
  @mode = FundamentalMode.new(self)
  @minor_modes = []
  @keymap = nil
  @attributes = {}
  @save_point_level = 0
  @match_offsets = []
  @visible_mark = nil
  @read_only = read_only
  @callbacks = {}
  @input_method = nil
end

Instance Attribute Details

#current_column ⇒ Object (readonly)

Returns the value of attribute current_column.



13
14
15
 
# File 'lib/textbringer/buffer.rb', line 13

def current_column
  @current_column
end

#current_line ⇒ Object (readonly)

Returns the value of attribute current_line.



13
14
15
 
# File 'lib/textbringer/buffer.rb', line 13

def current_line
  @current_line
end

#file_encoding ⇒ Object

Returns the value of attribute file_encoding.



12
13
14
 
# File 'lib/textbringer/buffer.rb', line 12

def file_encoding
  @file_encoding
end

#file_format ⇒ Object

Returns the value of attribute file_format.



12
13
14
 
# File 'lib/textbringer/buffer.rb', line 12

def file_format
  @file_format
end

#file_name ⇒ Object

Returns the value of attribute file_name.



12
13
14
 
# File 'lib/textbringer/buffer.rb', line 12

def file_name
  @file_name
end

#input_method ⇒ Object (readonly)

Returns the value of attribute input_method.



14
15
16
 
# File 'lib/textbringer/buffer.rb', line 14

def input_method
  @input_method
end

#keymap ⇒ Object

Returns the value of attribute keymap.



11
12
13
 
# File 'lib/textbringer/buffer.rb', line 11

def keymap
  @keymap
end

#marks ⇒ Object (readonly)

Returns the value of attribute marks.



12
13
14
 
# File 'lib/textbringer/buffer.rb', line 12

def marks
  @marks
end

#mode ⇒ Object

Returns the value of attribute mode.



11
12
13
 
# File 'lib/textbringer/buffer.rb', line 11

def mode
  @mode
end

#name ⇒ Object

Returns the value of attribute name.



12
13
14
 
# File 'lib/textbringer/buffer.rb', line 12

def name
  @name
end

#point ⇒ Object (readonly)

Returns the value of attribute point.



12
13
14
 
# File 'lib/textbringer/buffer.rb', line 12

def point
  @point
end

#visible_mark ⇒ Object (readonly)

Returns the value of attribute visible_mark.



13
14
15
 
# File 'lib/textbringer/buffer.rb', line 13

def visible_mark
  @visible_mark
end

Class Method Details

.[](name) ⇒ Object 



147
148
149
 
# File 'lib/textbringer/buffer.rb', line 147

def self.[](name)
  @@table[name]
end

.add(buffer) ⇒ Object 



104
105
106
107
 
# File 'lib/textbringer/buffer.rb', line 104

def self.add(buffer)
  @@table[buffer.name] = buffer
  @@list.push(buffer)
end

.auto_detect_encodings ⇒ Object 



84
85
86
 
# File 'lib/textbringer/buffer.rb', line 84

def self.auto_detect_encodings
  @@auto_detect_encodings
end

.auto_detect_encodings=(encodings) ⇒ Object 



88
89
90
 
# File 'lib/textbringer/buffer.rb', line 88

def self.auto_detect_encodings=(encodings)
  @@auto_detect_encodings = encodings
end

.bury(buffer = @@current) ⇒ Object 



137
138
139
140
141
 
# File 'lib/textbringer/buffer.rb', line 137

def self.bury(buffer = @@current)
  @@list.delete(buffer)
  @@list.push(buffer)
  @@current = @@list.first
end

.count ⇒ Object 



143
144
145
 
# File 'lib/textbringer/buffer.rb', line 143

def self.count
  @@table.size
end

.current ⇒ Object 



109
110
111
 
# File 'lib/textbringer/buffer.rb', line 109

def self.current
  @@current
end

.current=(buffer) ⇒ Object 



113
114
115
116
117
118
119
 
# File 'lib/textbringer/buffer.rb', line 113

def self.current=(buffer)
  if buffer && buffer.name && @@table.key?(buffer.name)
    @@list.delete(buffer)
    @@list.unshift(buffer)
  end
  @@current = buffer
end

.detect_encoding_proc ⇒ Object 



92
93
94
 
# File 'lib/textbringer/buffer.rb', line 92

def self.detect_encoding_proc
  @@detect_encoding_proc
end

.detect_encoding_proc=(f) ⇒ Object 



96
97
98
 
# File 'lib/textbringer/buffer.rb', line 96

def self.detect_encoding_proc=(f)
  @@detect_encoding_proc = f
end

.display_width(s) ⇒ Object 



202
203
204
 
# File 'lib/textbringer/buffer.rb', line 202

def self.display_width(s)
  Unicode::DisplayWidth.of(s, CONFIG[:east_asian_ambiguous_width])
end

.dump_unsaved_buffers(dir) ⇒ Object 



1337
1338
1339
1340
1341
1342
1343
1344
 
# File 'lib/textbringer/buffer.rb', line 1337

def self.dump_unsaved_buffers(dir)
  FileUtils.mkdir_p(dir)
  @@list.each do |buffer|
    if /\A\*/ !~ buffer.name && buffer.modified?
      buffer.dump(File.expand_path(buffer.object_id.to_s, dir))
    end
  end
end

.dumped_buffers_exist?(dir) ⇒ Boolean

Returns:

  • (Boolean) 


1346
1347
1348
 
# File 'lib/textbringer/buffer.rb', line 1346

def self.dumped_buffers_exist?(dir)
  !Dir.glob(File.expand_path("*.metadata", dir)).empty?
end

.each(&block) ⇒ Object 



198
199
200
 
# File 'lib/textbringer/buffer.rb', line 198

def self.each(&block)
  @@list.each(&block)
end

.find_file(file_name) ⇒ Object 



165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
 
# File 'lib/textbringer/buffer.rb', line 165

def self.find_file(file_name)
  file_name = File.expand_path(file_name)
  buffer = @@table.each_value.find { |b|
    b.file_name == file_name
  }
  if buffer.nil?
    name = File.basename(file_name)
    begin
      buffer = Buffer.open(file_name, name: new_buffer_name(name))
      add(buffer)
    rescue Errno::ENOENT
      buffer = new_buffer(name, file_name: file_name)
    end
  end
  buffer
end

.find_or_new(name, **opts) ⇒ Object 



151
152
153
 
# File 'lib/textbringer/buffer.rb', line 151

def self.find_or_new(name, **opts)
  @@table[name] ||= new_buffer(name, **opts)
end

.global_mark_ring ⇒ Object 



125
126
127
 
# File 'lib/textbringer/buffer.rb', line 125

def self.global_mark_ring
  @@global_mark_ring ||= Ring.new(CONFIG[:global_mark_ring_max])
end

.kill_em_all ⇒ Object 



159
160
161
162
163
 
# File 'lib/textbringer/buffer.rb', line 159

def self.kill_em_all
  @@table.clear
  @@list.clear
  @@current = nil
end

.last ⇒ Object 



133
134
135
 
# File 'lib/textbringer/buffer.rb', line 133

def self.last
  @@list.last
end

.list ⇒ Object 



100
101
102
 
# File 'lib/textbringer/buffer.rb', line 100

def self.list
  @@list.dup
end

.load(path) ⇒ Object 



1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
 
# File 'lib/textbringer/buffer.rb', line 1326

def self.load(path)
  buffer = Buffer.new(File.binread(path))
  metadata = JSON.parse(File.binread(path + ".metadata"))
  buffer.name = metadata["name"]
  buffer.file_name = metadata["file_name"] if metadata["file_name"]
  buffer.file_encoding = Encoding.find(metadata["file_encoding"])
  buffer.file_format = metadata["file_format"].intern
  buffer.modified = true
  buffer
end

.load_dumped_buffers(dir) ⇒ Object 



1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
 
# File 'lib/textbringer/buffer.rb', line 1350

def self.load_dumped_buffers(dir)
  Dir.glob(File.expand_path("*.metadata", dir)).map do |metadata_path|
    path = metadata_path.sub(/\.metadata\z/, "")
    buffer = Buffer.load(path)
    add(buffer)
    File.unlink(metadata_path)
    File.unlink(path)
    buffer
  end
end

.minibuffer ⇒ Object 



121
122
123
 
# File 'lib/textbringer/buffer.rb', line 121

def self.minibuffer
  @@minibuffer ||= Buffer.new(name: "*Minibuffer*")
end

.names ⇒ Object 



155
156
157
 
# File 'lib/textbringer/buffer.rb', line 155

def self.names
  @@table.keys
end

.new_buffer(name, **opts) ⇒ Object 



182
183
184
185
186
 
# File 'lib/textbringer/buffer.rb', line 182

def self.new_buffer(name, **opts)
  buffer = Buffer.new(**opts.merge(name: new_buffer_name(name)))
  add(buffer)
  buffer
end

.new_buffer_name(name) ⇒ Object 



188
189
190
191
192
193
194
195
196
 
# File 'lib/textbringer/buffer.rb', line 188

def self.new_buffer_name(name)
  if @@table.key?(name)
    (2..).lazy.map { |i|
      "#{name}<#{i}>"
    }.find { |i| !@@table.key?(i) }
  else
    name
  end
end

.open(file_name, name: File.basename(file_name)) ⇒ Object 



385
386
387
388
389
390
391
 
# File 'lib/textbringer/buffer.rb', line 385

def self.open(file_name, name: File.basename(file_name))
  buffer = Buffer.new(name: name,
                      file_name: file_name, new_file: false)
  buffer.revert
  buffer.read_only = !File.writable?(file_name)
  buffer
end

.other(buffer = @@current) ⇒ Object 



129
130
131
 
# File 'lib/textbringer/buffer.rb', line 129

def self.other(buffer = @@current)
  @@list.find { |buf|  buf != buffer } || Buffer.find_or_new("*scratch*")
end

.region_boundaries(s, e) ⇒ Object 



948
949
950
951
952
953
954
 
# File 'lib/textbringer/buffer.rb', line 948

def self.region_boundaries(s, e)
  if s > e
    [e, s]
  else
    [s, e]
  end
end

Instance Method Details

#[](name) ⇒ Object 



369
370
371
372
373
374
375
 
# File 'lib/textbringer/buffer.rb', line 369

def [](name)
  if @attributes.key?(name)
    @attributes[name]
  else
    CONFIG[name]
  end
end

#[]=(name, value) ⇒ Object 



377
378
379
 
# File 'lib/textbringer/buffer.rb', line 377

def []=(name, value)
  @attributes[name] = value
end

#apply_mode(mode_class) ⇒ Object 



1279
1280
1281
1282
1283
 
# File 'lib/textbringer/buffer.rb', line 1279

def apply_mode(mode_class)
  @keymap = nil
  @mode = mode_class.new(self)
  Utils.run_hooks(mode_class.hook_name)
end

#backward_char(n = 1) ⇒ Object 



680
681
682
 
# File 'lib/textbringer/buffer.rb', line 680

def backward_char(n = 1)
  forward_char(-n)
end

#backward_delete_char(n = 1) ⇒ Object 



669
670
671
 
# File 'lib/textbringer/buffer.rb', line 669

def backward_delete_char(n = 1)
  delete_char(-n)
end

#backward_line(n = 1) ⇒ Object 



730
731
732
 
# File 'lib/textbringer/buffer.rb', line 730

def backward_line(n = 1)
  forward_line(-n)
end

#backward_word(n = 1, regexp: WORD_COMPONENT_REGEXP) ⇒ Object 



696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
 
# File 'lib/textbringer/buffer.rb', line 696

def backward_word(n = 1, regexp: WORD_COMPONENT_REGEXP)
  return forward_word(-n) if n < 0
  n.times do
    break if beginning_of_buffer?
    backward_char
    while !beginning_of_buffer? && regexp !~ char_after
      backward_char
    end
    while !beginning_of_buffer? && regexp =~ char_after
      backward_char
    end
    if regexp !~ char_after
      forward_char
    end
  end
end

#beginning_of_buffer ⇒ Object 



755
756
757
758
759
760
761
 
# File 'lib/textbringer/buffer.rb', line 755

def beginning_of_buffer
  if @save_point_level == 0
    @current_line = 1
    @current_column = 1
  end
  @point = 0
end

#beginning_of_buffer? ⇒ Boolean

Returns:

  • (Boolean) 


763
764
765
 
# File 'lib/textbringer/buffer.rb', line 763

def beginning_of_buffer?
  @point == 0
end

#beginning_of_line ⇒ Object 



775
776
777
778
779
780
 
# File 'lib/textbringer/buffer.rb', line 775

def beginning_of_line
  while !beginning_of_line?
    backward_char
  end
  @point
end

#beginning_of_line? ⇒ Boolean

Returns:

  • (Boolean) 


782
783
784
 
# File 'lib/textbringer/buffer.rb', line 782

def beginning_of_line?
  beginning_of_buffer? || byte_before == "\n"
end

#binary? ⇒ Boolean

Returns:

  • (Boolean) 


288
289
290
 
# File 'lib/textbringer/buffer.rb', line 288

def binary?
  @binary
end

#byte_after(location = @point) ⇒ Object 



481
482
483
484
485
486
487
 
# File 'lib/textbringer/buffer.rb', line 481

def byte_after(location = @point)
  if location < @gap_start
    @contents.byteslice(location)
  else
    @contents.byteslice(location + gap_size)
  end&.force_encoding(Encoding::ASCII_8BIT)
end

#byte_before(location = @point) ⇒ Object 



489
490
491
492
493
494
495
 
# File 'lib/textbringer/buffer.rb', line 489

def byte_before(location = @point)
  if location <= point_min || location > point_max
    nil
  else
    byte_after(location - 1)
  end
end

#byteindex(forward, re, pos) ⇒ Object 



1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
 
# File 'lib/textbringer/buffer.rb', line 1160

def byteindex(forward, re, pos)
  @match_offsets = []
  method = forward ? :byteindex : :byterindex
  adjust_gap(0, 0)
  s = @contents.byteslice(@gap_end..-1)
  unless binary?
    s.force_encoding(Encoding::UTF_8)
  end
  i = s.send(method, re, pos)
  if i
    m = Regexp.last_match
    (0 .. m.size - 1).each do |j|
      @match_offsets.push(m.byteoffset(j))
    end
    i
  else
    nil
  end
end

#bytesize ⇒ Object Also known as: size 



519
520
521
 
# File 'lib/textbringer/buffer.rb', line 519

def bytesize
  @contents.bytesize - gap_size
end

#capitalize_word(n = 1) ⇒ Object 



1073
1074
1075
 
# File 'lib/textbringer/buffer.rb', line 1073

def capitalize_word(n = 1)
  convert_word(n, &:capitalize)
end

#char_after(location = @point) ⇒ Object 



497
498
499
500
501
502
503
504
 
# File 'lib/textbringer/buffer.rb', line 497

def char_after(location = @point)
  if @binary
    byte_after(location)
  else
    s = substring(location, location + UTF8_CHAR_LEN[byte_after(location)])
    s.empty? ? nil : s
  end
end

#char_before(location = @point) ⇒ Object 



506
507
508
509
510
511
512
513
514
515
516
517
 
# File 'lib/textbringer/buffer.rb', line 506

def char_before(location = @point)
  if @binary
    byte_before(location)
  else
    if beginning_of_buffer?
      nil
    else
      pos = get_pos(location, -1)
      substring(pos, location)
    end
  end
end

#clear ⇒ Object 



1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
 
# File 'lib/textbringer/buffer.rb', line 1013

def clear
  check_read_only_flag
  @contents = String.new
  @point = @gap_start = @gap_end = 0
  @marks.each do |m|
    m.location = 0
  end
  @current_line = 1
  @current_column = 1
  @goal_column = nil
  self.modified = true
  @undo_stack.clear
  @redo_stack.clear
end

#composite_edit ⇒ Object 



1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
 
# File 'lib/textbringer/buffer.rb', line 1259

def composite_edit
  location = @point
  @composite_edit_level += 1
  begin
    yield
  ensure
    @composite_edit_level -= 1
    if @composite_edit_level == 0 && !@composite_edit_actions.empty?
      action = CompositeAction.new(self, location)
      @composite_edit_actions.each do |i|
        action.add_action(i)
      end
      action.version = @composite_edit_actions.first.version
      push_undo(action)
      @composite_edit_actions.clear
    end
  end
  fire_callbacks(:modified)
end

#convert_word(n = 1, &block) ⇒ Object 



1056
1057
1058
1059
1060
1061
1062
1063
 
# File 'lib/textbringer/buffer.rb', line 1056

def convert_word(n = 1, &block)
  s = point
  forward_word(n)
  e = point
  s, e = Buffer.region_boundaries(s, e)
  str = substring(s, e).gsub(/[\p{Letter}\p{Number}]+/, &block)
  replace(str, start: s, end: e)
end

#copy_region(s = @point, e = mark, append = false) ⇒ Object 



956
957
958
959
960
961
962
963
964
 
# File 'lib/textbringer/buffer.rb', line 956

def copy_region(s = @point, e = mark, append = false)
  s, e = Buffer.region_boundaries(s, e)
  str = substring(s, e)
  if append && !KILL_RING.empty?
    KILL_RING.current.concat(str)
  else
    KILL_RING.push(str)
  end
end

#current? ⇒ Boolean

Returns:

  • (Boolean) 


345
346
347
 
# File 'lib/textbringer/buffer.rb', line 345

def current?
  @@current == self
end

#current_symbol ⇒ Object 



1361
1362
1363
1364
1365
 
# File 'lib/textbringer/buffer.rb', line 1361

def current_symbol
  from = save_point { skip_re_backward(@mode.symbol_pattern); @point }
  to = save_point { skip_re_forward(@mode.symbol_pattern); @point }
  from < to ? substring(from, to) : nil
end

#delete_char(n = 1) ⇒ Object 



631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
 
# File 'lib/textbringer/buffer.rb', line 631

def delete_char(n = 1)
  check_read_only_flag
  adjust_gap
  s = @point
  pos = get_pos(@point, n)
  if n > 0
    str = substring(s, pos)
    # fill the gap with NUL to avoid invalid byte sequence in UTF-8
    @contents.bytesplice(@gap_end...user_to_gap(pos), "\0" * (pos - @point))
    @gap_end += pos - @point
    @marks.each do |m|
      if m.location > pos
        m.location -= pos - @point
      elsif m.location > @point
        m.location = @point
      end
    end
    push_undo(DeleteAction.new(self, s, s, str))
    self.modified = true
  elsif n < 0
    str = substring(pos, s)
    update_line_and_column(@point, pos)
    # fill the gap with NUL to avoid invalid byte sequence in UTF-8
    @contents.bytesplice(user_to_gap(pos)...@gap_start, "\0" * (@point - pos))
    @marks.each do |m|
      if m.location >= @point
        m.location -= @point - pos
      elsif m.location > pos
        m.location = pos
      end
    end
    @point = @gap_start = pos
    push_undo(DeleteAction.new(self, s, pos, str))
    self.modified = true
  end
  @goal_column = nil
end

#delete_region(s = @point, e = mark) ⇒ Object 



971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
 
# File 'lib/textbringer/buffer.rb', line 971

def delete_region(s = @point, e = mark)
  check_read_only_flag
  old_pos = @point
  s, e = Buffer.region_boundaries(s, e)
  update_line_and_column(old_pos, s)
  save_point do
    str = substring(s, e)
    @point = s
    adjust_gap
    len = e - s
    # fill the gap with NUL to avoid invalid byte sequence in UTF-8
    @contents.bytesplice(@gap_end, len, "\0" * len)
    @gap_end += len
    @marks.each do |m|
      if m.location > e
        m.location -= len
      elsif m.location > s
        m.location = s
      end
    end
    push_undo(DeleteAction.new(self, old_pos, s, str))
    self.modified = true
  end
end

#delete_visible_mark ⇒ Object 



941
942
943
944
945
946
 
# File 'lib/textbringer/buffer.rb', line 941

def delete_visible_mark
  if @visible_mark
    @visible_mark.delete
    @visible_mark = nil
  end
end

#disable_input_method ⇒ Object 



1425
1426
1427
 
# File 'lib/textbringer/buffer.rb', line 1425

def disable_input_method
  @input_method&.disable
end

#display_width(s) ⇒ Object 



215
216
217
 
# File 'lib/textbringer/buffer.rb', line 215

def display_width(s)
  Buffer.display_width(expand_tab(s))
end

#downcase_word(n = 1) ⇒ Object 



1065
1066
1067
 
# File 'lib/textbringer/buffer.rb', line 1065

def downcase_word(n = 1)
  convert_word(n, &:downcase)
end

#dump(path) ⇒ Object 



1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
 
# File 'lib/textbringer/buffer.rb', line 1315

def dump(path)
  File.binwrite(path, to_s)
  metadata = {
    "name" => name,
    "file_name" => file_name,
    "file_encoding" => file_encoding.name,
    "file_format" => file_format.to_s
  }
  File.binwrite(path + ".metadata", metadata.to_json)
end

#end_of_buffer ⇒ Object 



767
768
769
 
# File 'lib/textbringer/buffer.rb', line 767

def end_of_buffer
  goto_char(bytesize)
end

#end_of_buffer? ⇒ Boolean

Returns:

  • (Boolean) 


771
772
773
 
# File 'lib/textbringer/buffer.rb', line 771

def end_of_buffer?
  @point == bytesize
end

#end_of_line ⇒ Object 



786
787
788
789
790
791
 
# File 'lib/textbringer/buffer.rb', line 786

def end_of_line
  while !end_of_line?
    forward_char
  end
  @point
end

#end_of_line? ⇒ Boolean

Returns:

  • (Boolean) 


793
794
795
 
# File 'lib/textbringer/buffer.rb', line 793

def end_of_line?
  end_of_buffer? || byte_after == "\n"
end

#exchange_point_and_mark(mark = @mark) ⇒ Object 



827
828
829
830
831
832
833
 
# File 'lib/textbringer/buffer.rb', line 827

def exchange_point_and_mark(mark = @mark)
  if mark.nil?
    raise EditorError, "The mark is not set"
  end
  update_line_and_column(@point, mark.location)
  @point, mark.location = mark.location, @point
end

#expand_tab(s) ⇒ Object 



206
207
208
209
210
211
212
213
 
# File 'lib/textbringer/buffer.rb', line 206

def expand_tab(s)
  # TODO: Support multibyte characters
  tw = self[:tab_width]
  fmt = "A#{tw}"
  s.b.gsub(/([^\t]{#{tw}})|([^\t]*)\t/n) {
    [$+].pack(fmt)
  }.force_encoding(Encoding::UTF_8)
end

#file_modified? ⇒ Boolean

Returns:

  • (Boolean) 


453
454
455
 
# File 'lib/textbringer/buffer.rb', line 453

def file_modified?
  !@file_mtime.nil? && File.mtime(@file_name) != @file_mtime
end

#filter_event(event) ⇒ Object 



1429
1430
1431
1432
1433
1434
1435
 
# File 'lib/textbringer/buffer.rb', line 1429

def filter_event(event)
  if @input_method
    @input_method.filter_event(event)
  else
    event
  end
end

#forward_char(n = 1) ⇒ Object 



673
674
675
676
677
678
 
# File 'lib/textbringer/buffer.rb', line 673

def forward_char(n = 1)
  pos = get_pos(@point, n)
  update_line_and_column(@point, pos)
  @point = pos
  @goal_column = nil
end

#forward_line(n = 1) ⇒ Object 



713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
 
# File 'lib/textbringer/buffer.rb', line 713

def forward_line(n = 1)
  if n > 0
    n.times do
      end_of_line
      break if end_of_buffer?
      forward_char
    end
  elsif n < 0
    (-n).times do
      beginning_of_line
      break if beginning_of_buffer?
      backward_char
      beginning_of_line
    end
  end
end

#forward_word(n = 1, regexp: WORD_COMPONENT_REGEXP) ⇒ Object 



684
685
686
687
688
689
690
691
692
693
694
 
# File 'lib/textbringer/buffer.rb', line 684

def forward_word(n = 1, regexp: WORD_COMPONENT_REGEXP)
  return backward_word(-n) if n < 0
  n.times do
    while !end_of_buffer? && regexp !~ char_after
      forward_char
    end
    while !end_of_buffer? && regexp =~ char_after
      forward_char
    end
  end
end

#gap_filled_with_nul? ⇒ Boolean

Returns:

  • (Boolean) 


1255
1256
1257
 
# File 'lib/textbringer/buffer.rb', line 1255

def gap_filled_with_nul?
  @contents.byteslice(@gap_start...@gap_end)&.match?(/\A\0*\z/)
end

#get_line_and_column(pos) ⇒ Object 



532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
 
# File 'lib/textbringer/buffer.rb', line 532

def get_line_and_column(pos)
  line = 1 + @contents.byteslice(0...user_to_gap(pos)).count("\n")
  if pos == point_min
    column = 1
  else
    begin
      i = @contents.byterindex("\n", user_to_gap(get_pos(pos, -1)))
    rescue RangeError
      i = nil
    end
    if i
      i += 1
    else
      i = 0
    end
    column = 1 + substring(gap_to_user(i), pos).size
  end
  [line, column]
end

#goto_char(pos) ⇒ Object 



552
553
554
555
556
557
558
559
560
561
562
563
564
565
 
# File 'lib/textbringer/buffer.rb', line 552

def goto_char(pos)
  return pos if pos == @point
  if pos < 0 || pos > size
    raise RangeError, "Out of buffer"
  end
  if !@binary && byte_after(pos)&.match?(/[\x80-\xbf]/n)
    raise ArgumentError, "Position is in the middle of a character"
  end
  @goal_column = nil
  if @save_point_level == 0
    @current_line, @current_column = get_line_and_column(pos)
  end
  @point = pos
end

#goto_line(n) ⇒ Object 



567
568
569
570
571
572
573
574
575
576
577
578
579
580
 
# File 'lib/textbringer/buffer.rb', line 567

def goto_line(n)
  pos = point_min
  i = 1
  while i < n && pos < @contents.bytesize
    pos = @contents.byteindex("\n", pos)
    break if pos.nil?
    i += 1
    pos += 1
  end
  @point = gap_to_user(pos)
  @current_line = i
  @current_column = 1
  @goal_column = nil
end

#gsub(*args, &block) ⇒ Object 



1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
 
# File 'lib/textbringer/buffer.rb', line 1379

def gsub(*args, &block)
  if block
    s = to_s.gsub(*args) { |*params|
      block.binding.eval('->(backref) { $~ = backref }').call($~)
      block.call(*params)
    }
  else
    s = to_s.gsub(*args)
  end

  composite_edit do
    delete_region(point_min, point_max)
    insert(s)
  end
  self
end

#indent_to(column) ⇒ Object 



1306
1307
1308
1309
1310
1311
1312
1313
 
# File 'lib/textbringer/buffer.rb', line 1306

def indent_to(column)
  s = if self[:indent_tabs_mode]
    "\t" * (column / self[:tab_width]) + " " * (column % self[:tab_width])
  else
    " " * column
  end
  insert(s)
end

#input_method_status ⇒ Object 



1437
1438
1439
1440
1441
1442
1443
 
# File 'lib/textbringer/buffer.rb', line 1437

def input_method_status
  if @input_method&.enabled?
    @input_method.status
  else
    "--"
  end
end

#insert(x, merge_undo = false) ⇒ Object 



582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
 
# File 'lib/textbringer/buffer.rb', line 582

def insert(x, merge_undo = false)
  s = x.to_s
  if !binary? && !s.valid_encoding?
    raise EditorError, "Invalid encoding: #{s.dump}"
  end
  check_read_only_flag
  pos = @point
  size = s.bytesize
  adjust_gap(size)
  @contents.bytesplice(@point, size, s.b)
  @marks.each do |m|
    if m.location > @point
      m.location += size
    end
  end
  @point = @gap_start += size
  update_line_and_column(pos, @point)
  unless @undoing
    if merge_undo && @undo_stack.last.is_a?(InsertAction)
      @undo_stack.last.merge(s)
      @redo_stack.clear
    else
      push_undo(InsertAction.new(self, pos, s))
    end
  end
  self.modified = true
  @goal_column = nil
  self
end

#insert_final_newline ⇒ Object 



1407
1408
1409
1410
1411
1412
1413
1414
 
# File 'lib/textbringer/buffer.rb', line 1407

def insert_final_newline
  save_excursion do
    end_of_buffer
    if char_before != "\n"
      insert("\n")
    end
  end
end

#insert_for_yank(s) ⇒ Object 



1077
1078
1079
1080
1081
1082
 
# File 'lib/textbringer/buffer.rb', line 1077

def insert_for_yank(s)
  if @mark.nil? || !point_at_mark?(@mark)
    push_mark
  end
  insert(s)
end

#inspect ⇒ Object 



261
262
263
 
# File 'lib/textbringer/buffer.rb', line 261

def inspect
  "#<Buffer:#{@name || '0x%x' % object_id}>"
end

#kill ⇒ Object 



329
330
331
332
333
334
335
336
337
338
339
 
# File 'lib/textbringer/buffer.rb', line 329

def kill
  @@table.delete(@name)
  @@list.delete(self)
  if @@current == self
    @@current = nil
  end
  @marks.each do |mark|
    mark.detach
  end
  fire_callbacks(:killed)
end

#kill_line(append = false) ⇒ Object 



1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
 
# File 'lib/textbringer/buffer.rb', line 1028

def kill_line(append = false)
  save_point do |saved|
    if end_of_buffer?
      raise RangeError, "End of buffer"
    end
    if char_after == ?\n
      forward_char
    else
      end_of_line
    end
    pos = @point
    point_to_mark(saved)
    kill_region(@point, pos, append)
  end
end

#kill_region(s = @point, e = mark, append = false) ⇒ Object 



966
967
968
969
 
# File 'lib/textbringer/buffer.rb', line 966

def kill_region(s = @point, e = mark, append = false)
  copy_region(s, e, append)
  delete_region(s, e)
end

#kill_word(append = false) ⇒ Object 



1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
 
# File 'lib/textbringer/buffer.rb', line 1044

def kill_word(append = false)
  save_point do |saved|
    if end_of_buffer?
      raise RangeError, "End of buffer"
    end
    forward_word
    pos = @point
    point_to_mark(saved)
    kill_region(@point, pos, append)
  end
end

#looking_at?(re) ⇒ Boolean

Returns:

  • (Boolean) 


1151
1152
1153
1154
1155
1156
1157
1158
 
# File 'lib/textbringer/buffer.rb', line 1151

def looking_at?(re)
  if re.is_a?(Regexp)
    r = /\G#{re}/
  else
    r = "\\G(?:#{re})"
  end
  byteindex(true, r, @point) == @point
end

#mark ⇒ Object 



869
870
871
872
873
874
 
# File 'lib/textbringer/buffer.rb', line 869

def mark
  if @mark.nil?
    raise EditorError, "The mark is not set"
  end
  @mark.location
end

#mark_to_point(mark) ⇒ Object 



807
808
809
 
# File 'lib/textbringer/buffer.rb', line 807

def mark_to_point(mark)
  mark.location = @point
end

#match_beginning(n) ⇒ Object 



1180
1181
1182
 
# File 'lib/textbringer/buffer.rb', line 1180

def match_beginning(n)
  @match_offsets[n]&.first
end

#match_end(n) ⇒ Object 



1184
1185
1186
 
# File 'lib/textbringer/buffer.rb', line 1184

def match_end(n)
  @match_offsets[n]&.last
end

#match_string(n) ⇒ Object 



1188
1189
1190
1191
1192
1193
1194
1195
 
# File 'lib/textbringer/buffer.rb', line 1188

def match_string(n)
  b, e = @match_offsets[n]
  if b.nil?
    nil
  else
    substring(b, e)
  end
end

#mode_names ⇒ Object 



1297
1298
1299
1300
1301
1302
1303
1304
 
# File 'lib/textbringer/buffer.rb', line 1297

def mode_names
  names = []
  names.push(mode&.name || 'None')
  @minor_modes.each do |mode|
    names.push(mode.name)
  end
  names
end

#modified=(modified) ⇒ Object 



354
355
356
357
358
359
 
# File 'lib/textbringer/buffer.rb', line 354

def modified=(modified)
  @modified = modified
  if @composite_edit_level == 0 && modified
    fire_callbacks(:modified)
  end
end

#modified? ⇒ Boolean

Returns:

  • (Boolean) 


361
362
363
 
# File 'lib/textbringer/buffer.rb', line 361

def modified?
  @modified
end

#new_file? ⇒ Boolean

Returns:

  • (Boolean) 


381
382
383
 
# File 'lib/textbringer/buffer.rb', line 381

def new_file?
  @new_file
end

#new_mark(location = @point) ⇒ Object 



797
798
799
800
801
 
# File 'lib/textbringer/buffer.rb', line 797

def new_mark(location = @point)
  Mark.new(self, location).tap { |m|
    @marks << m
  }
end

#newline ⇒ Object 



612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
 
# File 'lib/textbringer/buffer.rb', line 612

def newline
  indentation = save_point { |saved|
    if char_after&.match?(/[ \t]/)
      next ""
    end
    beginning_of_line
    s = @point
    while char_after&.match?(/[ \t]/)
      forward_char
    end
    str = substring(s, @point)
    if end_of_buffer? || char_after == "\n"
      delete_region(s, @point)
    end
    str
  }
  insert("\n" + indentation)
end

#next_line(n = 1) ⇒ Object 



734
735
736
737
738
739
740
741
742
 
# File 'lib/textbringer/buffer.rb', line 734

def next_line(n = 1)
  column = get_goal_column
  n.times do
    end_of_line
    forward_char
    adjust_column(column)
  end
  @goal_column = column
end

#on(name, &callback) ⇒ Object 



349
350
351
352
 
# File 'lib/textbringer/buffer.rb', line 349

def on(name, &callback)
  @callbacks[name] ||= []
  @callbacks[name].push(callback)
end

#on_global_mark_ring? ⇒ Boolean

Returns:

  • (Boolean) 


899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
 
# File 'lib/textbringer/buffer.rb', line 899

def on_global_mark_ring?
  mark_ring = Buffer.global_mark_ring
  if mark_ring.empty?
    return false
  end
  current = mark_ring.current
  if current&.buffer == self
    return true
  end
  next_mark = mark_ring[-1]
  if next_mark&.buffer ==  self
    return true
  end
  false
end

#on_killed(&callback) ⇒ Object 



341
342
343
 
# File 'lib/textbringer/buffer.rb', line 341

def on_killed(&callback)
  add_callback(:killed, callback)
end

#on_modified(&callback) ⇒ Object 



365
366
367
 
# File 'lib/textbringer/buffer.rb', line 365

def on_modified(&callback)
  add_callback(:modified, callback)
end

#point_after_mark?(mark) ⇒ Boolean

Returns:

  • (Boolean) 


819
820
821
 
# File 'lib/textbringer/buffer.rb', line 819

def point_after_mark?(mark)
  @point > mark.location
end

#point_at_mark?(mark) ⇒ Boolean

Returns:

  • (Boolean) 


811
812
813
 
# File 'lib/textbringer/buffer.rb', line 811

def point_at_mark?(mark)
  @point == mark.location
end

#point_before_mark?(mark) ⇒ Boolean

Returns:

  • (Boolean) 


815
816
817
 
# File 'lib/textbringer/buffer.rb', line 815

def point_before_mark?(mark)
  @point < mark.location
end

#point_compare_mark(mark) ⇒ Object 



823
824
825
 
# File 'lib/textbringer/buffer.rb', line 823

def point_compare_mark(mark)
  @point - mark.location
end

#point_max ⇒ Object 



528
529
530
 
# File 'lib/textbringer/buffer.rb', line 528

def point_max
  bytesize
end

#point_min ⇒ Object 



524
525
526
 
# File 'lib/textbringer/buffer.rb', line 524

def point_min
  0
end

#point_to_mark(mark) ⇒ Object 



803
804
805
 
# File 'lib/textbringer/buffer.rb', line 803

def point_to_mark(mark)
  goto_char(mark.location)
end

#pop_mark ⇒ Object 



926
927
928
929
 
# File 'lib/textbringer/buffer.rb', line 926

def pop_mark
  return if @mark_ring.empty?
  @mark = @mark_ring.rotate(1)
end

#pop_to_mark ⇒ Object 



931
932
933
934
 
# File 'lib/textbringer/buffer.rb', line 931

def pop_to_mark
  goto_char(mark)
  pop_mark
end

#previous_line(n = 1) ⇒ Object 



744
745
746
747
748
749
750
751
752
753
 
# File 'lib/textbringer/buffer.rb', line 744

def previous_line(n = 1)
  column = get_goal_column
  n.times do
    beginning_of_line
    backward_char
    beginning_of_line
    adjust_column(column)
  end
  @goal_column = column
end

#push_global_mark(pos = @point, force: false) ⇒ Object 



915
916
917
918
919
920
921
922
923
924
 
# File 'lib/textbringer/buffer.rb', line 915

def push_global_mark(pos = @point, force: false)
  if force || !on_global_mark_ring?
    mark = new_mark
    mark.location = pos
    Buffer.global_mark_ring.push(mark)
    true
  else
    false
  end
end

#push_mark(pos = @point) ⇒ Object

Set mark at pos, and push the mark on the mark ring. Unlike Emacs, the new mark is pushed on the mark ring instead of the old one.



887
888
889
890
891
892
893
894
895
896
897
 
# File 'lib/textbringer/buffer.rb', line 887

def push_mark(pos = @point)
  @mark = new_mark
  @mark.location = pos
  @mark_ring.push(@mark)
  if self != Buffer.minibuffer
    global_mark_ring = Buffer.global_mark_ring
    if global_mark_ring.empty? || global_mark_ring.current.buffer != self
      push_global_mark(pos)
    end
  end
end

#re_search_backward(s, raise_error: true, count: 1) ⇒ Object 



1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
 
# File 'lib/textbringer/buffer.rb', line 1121

def re_search_backward(s, raise_error: true, count: 1)
  if count < 0
    return re_search_forward(s, raise_error: raise_error, count: -count)
  end
  re = new_regexp(s)
  pos = @point
  count.times do
    p = pos
    begin
      i = byteindex(false, re, p)
      if i.nil?
        if raise_error
          raise SearchError, "Search failed"
        else
          return nil
        end
      end
      p = get_pos(p, -1)
    rescue RangeError
      if raise_error
        raise SearchError, "Search failed"
      else
        return nil
      end
    end while match_end(0) > pos
    pos = match_beginning(0)
  end
  goto_char(pos)
end

#re_search_forward(s, raise_error: true, goto_beginning: false, count: 1) ⇒ Object 



1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
 
# File 'lib/textbringer/buffer.rb', line 1101

def re_search_forward(s, raise_error: true, goto_beginning: false, count: 1)
  if count < 0
    return re_search_backward(s, raise_error: raise_error, count: -count)
  end
  re = new_regexp(s)
  pos = @point
  count.times do
    i = byteindex(true, re, pos)
    if i.nil?
      if raise_error
        raise SearchError, "Search failed"
      else
        return nil
      end
    end
    pos = goto_beginning ? match_beginning(0) : match_end(0)
  end
  goto_char(pos)
end

#read_only=(value) ⇒ Object 



309
310
311
312
313
314
 
# File 'lib/textbringer/buffer.rb', line 309

def read_only=(value)
  @read_only = value
  if @read_only
    @modified = false
  end
end

#read_only? ⇒ Boolean

Returns:

  • (Boolean) 


305
306
307
 
# File 'lib/textbringer/buffer.rb', line 305

def read_only?
  @read_only
end

#read_only_edit ⇒ Object 



320
321
322
323
324
325
326
327
 
# File 'lib/textbringer/buffer.rb', line 320

def read_only_edit
  self.read_only = false
  begin
    yield
  ensure
    self.read_only = true
  end
end

#redo ⇒ Object 



1097
1098
1099
 
# File 'lib/textbringer/buffer.rb', line 1097

def redo
  undo_or_redo(:redo, @redo_stack, @undo_stack)
end

#replace(str = nil, start: point_min, end: point_max, &block) ⇒ Object 



996
997
998
999
1000
1001
1002
1003
1004
1005
1006
 
# File 'lib/textbringer/buffer.rb', line 996

def replace(str = nil, start: point_min, end: point_max, &block)
  end_pos = binding.local_variable_get(:end)
  if str.nil?
    str = block.call(substring(start, end_pos))
  end
  composite_edit do
    delete_region(start, end_pos)
    goto_char(start)
    insert(str)
  end
end

#replace_match(str) ⇒ Object 



1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
 
# File 'lib/textbringer/buffer.rb', line 1197

def replace_match(str)
  new_str = str.gsub(/\\(?:([0-9]+)|(&)|(\\))/) { |s|
    case
    when $1
      match_string($1.to_i)
    when $2
      match_string(0)
    when $3
      "\\"
    end
  }
  b = match_beginning(0)
  e =  match_end(0)
  goto_char(b)
  composite_edit do
    delete_region(b, e)
    insert(new_str)
  end
end

#replace_regexp_forward(regexp, to_str) ⇒ Object 



1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
 
# File 'lib/textbringer/buffer.rb', line 1217

def replace_regexp_forward(regexp, to_str)
  result = 0
  rest = substring(point, point_max)
  composite_edit do
    delete_region(point, point_max)
    new_str = rest.gsub(new_regexp(regexp)) {
      result += 1
      m = Regexp.last_match
      to_str.gsub(/\\(?:([0-9]+)|(&)|(\\))/) { |s|
      case
      when $1
        m[$1.to_i]
      when $2
        m.to_s
      when $3
        "\\"
      end
      }
    }
    insert(new_str)
  end
  result
end

#replace_region(str = nil, &block) ⇒ Object 



1008
1009
1010
1011
 
# File 'lib/textbringer/buffer.rb', line 1008

def replace_region(str = nil, &block)
  s, e = Buffer.region_boundaries(@point, mark)
  replace(str, start: s, end: e, &block)
end

#revert(enc = nil) ⇒ Object 



393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
 
# File 'lib/textbringer/buffer.rb', line 393

def revert(enc = nil)
  if @file_name.nil?
    raise EditorError, "Buffer has no file name"
  end
  clear
  s, mtime = File.open(@file_name,
                       external_encoding: Encoding::ASCII_8BIT,
                       binmode: true) { |f|
    f.flock(File::LOCK_SH)
    [f.read, f.mtime]
  }
  enc ||= @@detect_encoding_proc.call(s) || Encoding::ASCII_8BIT
  s.force_encoding(enc)
  unless s.valid_encoding?
    enc = Encoding::ASCII_8BIT
    s.force_encoding(enc)
  end
  set_contents(s, enc)
  @file_mtime = mtime
  @modified = false
end

#save(file_name = @file_name) ⇒ Object 



415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
 
# File 'lib/textbringer/buffer.rb', line 415

def save(file_name = @file_name)
  if file_name.nil?
    raise EditorError, "File name is not set"
  end
  file_name = File.expand_path(file_name)
  config = EditorConfig.load_file(file_name)
  if config["trim_trailing_whitespace"]
    trim_trailing_whitespace
  end
  if config["insert_final_newline"]
    insert_final_newline
  end
  begin
    File.open(file_name, "w",
              external_encoding: @file_encoding, binmode: true) do |f|
      f.flock(File::LOCK_EX)
      write_to_file(f)
      f.flush
      f.fsync
    end
    @file_mtime = File.mtime(file_name)
  rescue Errno::EISDIR
    if @name
      file_name = File.expand_path(@name, file_name)
      retry
    else
      raise
    end
  end
  if file_name != @file_name
    self.file_name = file_name
  end
  @version += 1
  @modified = false
  @new_file = false
  @read_only = false
end

#save_excursion ⇒ Object

Don’t save Buffer.current.



852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
 
# File 'lib/textbringer/buffer.rb', line 852

def save_excursion
  old_point = new_mark
  old_mark = @mark&.dup
  old_column = @goal_column
  begin
    yield
  ensure
    point_to_mark(old_point)
    old_point.delete
    if old_mark
      @mark.location = old_mark.location
      old_mark.delete
    end
    @goal_column = old_column
  end
end

#save_point ⇒ Object

The buffer should not be modified in the given block because current_line/current_column is not updated in save_point.



837
838
839
840
841
842
843
844
845
846
847
848
849
 
# File 'lib/textbringer/buffer.rb', line 837

def save_point
  saved = new_mark
  column = @goal_column
  @save_point_level += 1
  begin
    yield(saved)
  ensure
    point_to_mark(saved)
    saved.delete
    @goal_column = column
    @save_point_level -= 1
  end
end

#set_mark(pos = @point) ⇒ Object 



876
877
878
879
880
881
882
 
# File 'lib/textbringer/buffer.rb', line 876

def set_mark(pos = @point)
  if @mark
    @mark.location = pos
  else
    push_mark(pos)
  end
end

#set_read_only(value) ⇒ Object 



316
317
318
 
# File 'lib/textbringer/buffer.rb', line 316

def set_read_only(value)
  @read_only = value
end

#set_visible_mark(pos = @point) ⇒ Object 



936
937
938
939
 
# File 'lib/textbringer/buffer.rb', line 936

def set_visible_mark(pos = @point)
  @visible_mark ||= new_mark
  @visible_mark.location = pos
end

#skip_re_backward(re) ⇒ Object 



1373
1374
1375
1376
1377
 
# File 'lib/textbringer/buffer.rb', line 1373

def skip_re_backward(re)
  while re =~ char_before
    backward_char
  end
end

#skip_re_forward(re) ⇒ Object 



1367
1368
1369
1370
1371
 
# File 'lib/textbringer/buffer.rb', line 1367

def skip_re_forward(re)
  while re =~ char_after
    forward_char
  end
end

#substring(s, e) ⇒ Object 



466
467
468
469
470
471
472
473
474
475
476
477
478
479
 
# File 'lib/textbringer/buffer.rb', line 466

def substring(s, e)
  result =
    if s > @gap_start || e <= @gap_start
      @contents.byteslice(user_to_gap(s)...user_to_gap(e))
    else
      len = @gap_start - s
      @contents.byteslice(user_to_gap(s), len) +
        @contents.byteslice(@gap_end, e - s - len)
    end
  if !@binary
    result.force_encoding(Encoding::UTF_8)
  end
  result
end

#to_s ⇒ Object 



457
458
459
460
461
462
463
464
 
# File 'lib/textbringer/buffer.rb', line 457

def to_s
  result = @contents.byteslice(0...@gap_start) +
    @contents.byteslice(@gap_end..-1)
  if !@binary
    result.force_encoding(Encoding::UTF_8)
  end
  result
end

#toggle_input_method(name) ⇒ Object 



1416
1417
1418
1419
1420
1421
1422
1423
 
# File 'lib/textbringer/buffer.rb', line 1416

def toggle_input_method(name)
  if name.nil?
    @input_method ||= InputMethod.find(CONFIG[:default_input_method])
  else
    @input_method = InputMethod.find(name)
  end
  @input_method.toggle
end

#toggle_minor_mode(mode_class) ⇒ Object 



1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
 
# File 'lib/textbringer/buffer.rb', line 1285

def toggle_minor_mode(mode_class)
  mode = @minor_modes.find { |mode| mode.instance_of?(mode_class) }
  if mode
    mode.disable
    @minor_modes.delete(mode)
  else
    mode = mode_class.new(self)
    @minor_modes.push(mode)
    mode.enable
  end
end

#transpose_chars ⇒ Object 



1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
 
# File 'lib/textbringer/buffer.rb', line 1241

def transpose_chars
  if end_of_line?
    backward_char
  end
  if beginning_of_buffer?
    raise RangeError, "Beginning of buffer"
  end
  backward_char
  c = char_after
  delete_char
  forward_char
  insert(c)
end

#trim_trailing_whitespace ⇒ Object 



1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
 
# File 'lib/textbringer/buffer.rb', line 1396

def trim_trailing_whitespace
  save_excursion do
    beginning_of_buffer
    composite_edit do
      while re_search_forward(/[ \t]+$/, raise_error: false)
        replace_match("")
      end
    end
  end
end

#undo ⇒ Object 



1093
1094
1095
 
# File 'lib/textbringer/buffer.rb', line 1093

def undo
  undo_or_redo(:undo, @undo_stack, @redo_stack)
end

#upcase_word(n = 1) ⇒ Object 



1069
1070
1071
 
# File 'lib/textbringer/buffer.rb', line 1069

def upcase_word(n = 1)
  convert_word(n, &:upcase)
end

#yank ⇒ Object 



1084
1085
1086
 
# File 'lib/textbringer/buffer.rb', line 1084

def yank
  insert_for_yank(KILL_RING.current)
end

#yank_pop ⇒ Object 



1088
1089
1090
1091
 
# File 'lib/textbringer/buffer.rb', line 1088

def yank_pop
  delete_region
  insert_for_yank(KILL_RING.rotate(1))
end