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ruby--ruby/lib/reline/line_editor.rb
2019-06-27 01:21:06 +09:00

1905 lines
58 KiB
Ruby

require 'reline/kill_ring'
require 'reline/unicode'
require 'tempfile'
require 'pathname'
class Reline::LineEditor
# TODO: undo
attr_reader :line
attr_reader :byte_pointer
attr_accessor :confirm_multiline_termination_proc
attr_accessor :completion_proc
attr_accessor :output_modifier_proc
attr_accessor :prompt_proc
attr_accessor :auto_indent_proc
attr_accessor :pre_input_hook
attr_accessor :dig_perfect_match_proc
attr_writer :output
VI_MOTIONS = %i{
ed_prev_char
ed_next_char
vi_zero
ed_move_to_beg
ed_move_to_end
vi_to_column
vi_next_char
vi_prev_char
vi_next_word
vi_prev_word
vi_to_next_char
vi_to_prev_char
vi_end_word
vi_next_big_word
vi_prev_big_word
vi_end_big_word
vi_repeat_next_char
vi_repeat_prev_char
}
module CompletionState
NORMAL = :normal
COMPLETION = :completion
MENU = :menu
JOURNEY = :journey
PERFECT_MATCH = :perfect_match
end
CompletionJourneyData = Struct.new('CompletionJourneyData', :preposing, :postposing, :list, :pointer)
MenuInfo = Struct.new('MenuInfo', :target, :list)
CSI_REGEXP = /\e\[[\d;]*[ABCDEFGHJKSTfminsuhl]/
OSC_REGEXP = /\e\]\d+(?:;[^;]+)*\a/
NON_PRINTING_START = "\1"
NON_PRINTING_END = "\2"
def initialize(config)
@config = config
reset_variables
end
def reset(prompt = '', encoding = Encoding.default_external)
@rest_height = (Reline::IOGate.get_screen_size.first - 1) - Reline::IOGate.cursor_pos.y
@screen_size = Reline::IOGate.get_screen_size
reset_variables(prompt, encoding)
@old_trap = Signal.trap('SIGINT') {
scroll_down(@highest_in_all - @first_line_started_from)
Reline::IOGate.move_cursor_column(0)
@old_trap.()
}
end
def finalize
Signal.trap('SIGINT', @old_trap)
end
def eof?
@eof
end
def reset_variables(prompt = '', encoding = Encoding.default_external)
@prompt = prompt
@encoding = encoding
@is_multiline = false
@finished = false
@cleared = false
@rerender_all = false
@history_pointer = nil
@kill_ring = Reline::KillRing.new
@vi_clipboard = ''
@vi_arg = nil
@waiting_proc = nil
@waiting_operator_proc = nil
@completion_journey_data = nil
@completion_state = CompletionState::NORMAL
@perfect_matched = nil
@menu_info = nil
@first_prompt = true
@searching_prompt = nil
@first_char = true
@eof = false
reset_line
end
def reset_line
@cursor = 0
@cursor_max = 0
@byte_pointer = 0
@buffer_of_lines = [String.new(encoding: @encoding)]
@line_index = 0
@previous_line_index = nil
@line = @buffer_of_lines[0]
@first_line_started_from = 0
@move_up = 0
@started_from = 0
@highest_in_this = 1
@highest_in_all = 1
@line_backup_in_history = nil
@multibyte_buffer = String.new(encoding: 'ASCII-8BIT')
@check_new_auto_indent = false
end
def multiline_on
@is_multiline = true
end
def multiline_off
@is_multiline = false
end
private def insert_new_line(cursor_line, next_line)
@line = cursor_line
@buffer_of_lines.insert(@line_index + 1, String.new(next_line, encoding: @encoding))
@previous_line_index = @line_index
@line_index += 1
end
private def calculate_height_by_width(width)
return 1 if width.zero?
height = 1
max_width = @screen_size.last
while width > max_width * height
height += 1
end
height += 1 if (width % max_width).zero?
height
end
private def split_by_width(prompt, str, max_width)
lines = [String.new(encoding: @encoding)]
height = 1
width = 0
rest = "#{prompt}#{str}".encode(Encoding::UTF_8)
in_zero_width = false
loop do
break if rest.empty?
if rest.start_with?(NON_PRINTING_START)
rest.delete_prefix!(NON_PRINTING_START)
in_zero_width = true
elsif rest.start_with?(NON_PRINTING_END)
rest.delete_prefix!(NON_PRINTING_END)
in_zero_width = false
elsif rest.start_with?(CSI_REGEXP)
lines.last << $&
rest = $'
elsif rest.start_with?(OSC_REGEXP)
lines.last << $&
rest = $'
else
gcs = rest.grapheme_clusters
gc = gcs.first
rest = gcs[1..-1].join
if in_zero_width
mbchar_width = 0
else
mbchar_width = Reline::Unicode.get_mbchar_width(gc)
end
width += mbchar_width
if width > max_width
width = mbchar_width
lines << nil
lines << String.new(encoding: @encoding)
height += 1
end
lines.last << gc
end
end
# The cursor moves to next line in first
if width == max_width
lines << nil
lines << String.new(encoding: @encoding)
height += 1
end
[lines, height]
end
private def scroll_down(val)
if val <= @rest_height
Reline::IOGate.move_cursor_down(val)
@rest_height -= val
else
Reline::IOGate.move_cursor_down(@rest_height)
Reline::IOGate.scroll_down(val - @rest_height)
@rest_height = 0
end
end
private def move_cursor_up(val)
if val > 0
Reline::IOGate.move_cursor_up(val)
@rest_height += val
elsif val < 0
move_cursor_down(-val)
end
end
private def move_cursor_down(val)
if val > 0
Reline::IOGate.move_cursor_down(val)
@rest_height -= val
@rest_height = 0 if @rest_height < 0
elsif val < 0
move_cursor_up(-val)
end
end
private def calculate_nearest_cursor
@cursor_max = calculate_width(line)
new_cursor = 0
new_byte_pointer = 0
height = 1
max_width = @screen_size.last
if @config.editing_mode_is?(:vi_command)
last_byte_size = Reline::Unicode.get_prev_mbchar_size(@line, @line.bytesize)
if last_byte_size > 0
last_mbchar = @line.byteslice(@line.bytesize - last_byte_size, last_byte_size)
last_width = Reline::Unicode.get_mbchar_width(last_mbchar)
cursor_max = @cursor_max - last_width
else
cursor_max = @cursor_max
end
else
cursor_max = @cursor_max
end
@line.encode(Encoding::UTF_8).grapheme_clusters.each do |gc|
mbchar_width = Reline::Unicode.get_mbchar_width(gc)
now = new_cursor + mbchar_width
if now > cursor_max or now > @cursor
break
end
new_cursor += mbchar_width
if new_cursor > max_width * height
height += 1
end
new_byte_pointer += gc.bytesize
end
@started_from = height - 1
@cursor = new_cursor
@byte_pointer = new_byte_pointer
end
def rerender # TODO: support physical and logical lines
return if @line.nil?
if @menu_info
scroll_down(@highest_in_all - @first_line_started_from)
@rerender_all = true
@menu_info.list.each do |item|
Reline::IOGate.move_cursor_column(0)
@output.print item
scroll_down(1)
end
scroll_down(@highest_in_all - 1)
move_cursor_up(@highest_in_all - 1 - @first_line_started_from)
@menu_info = nil
end
if @vi_arg
prompt = "(arg: #{@vi_arg}) "
prompt_width = calculate_width(prompt)
elsif @searching_prompt
prompt = @searching_prompt
prompt_width = calculate_width(prompt)
else
prompt = @prompt
prompt_width = calculate_width(prompt, true)
end
if @cleared
Reline::IOGate.clear_screen
@cleared = false
back = 0
prompt_list = nil
if @prompt_proc
prompt_list = @prompt_proc.(whole_lines)
prompt = prompt_list[@line_index]
prompt_width = calculate_width(prompt, true)
end
modify_lines(whole_lines).each_with_index do |line, index|
if @prompt_proc
pr = prompt_list[index]
height = render_partial(pr, calculate_width(pr), line, false)
else
height = render_partial(prompt, prompt_width, line, false)
end
if index < (@buffer_of_lines.size - 1)
move_cursor_down(height)
back += height
end
end
move_cursor_up(back)
move_cursor_down(@first_line_started_from + @started_from)
Reline::IOGate.move_cursor_column((prompt_width + @cursor) % @screen_size.last)
return
end
new_highest_in_this = calculate_height_by_width(prompt_width + calculate_width(@line.nil? ? '' : @line))
# FIXME: end of logical line sometimes breaks
if @previous_line_index or new_highest_in_this != @highest_in_this
if @previous_line_index
new_lines = whole_lines(index: @previous_line_index, line: @line)
else
new_lines = whole_lines
end
prompt_list = nil
if @prompt_proc
prompt_list = @prompt_proc.(new_lines)
prompt = prompt_list[@line_index]
prompt_width = calculate_width(prompt, true)
end
all_height = new_lines.inject(0) { |result, line|
result + calculate_height_by_width(prompt_width + calculate_width(line)) # TODO prompt_list
}
diff = all_height - @highest_in_all
move_cursor_down(@highest_in_all - @first_line_started_from - @started_from - 1)
if diff > 0
scroll_down(diff)
move_cursor_up(all_height - 1)
elsif diff < 0
(-diff).times do
Reline::IOGate.move_cursor_column(0)
Reline::IOGate.erase_after_cursor
move_cursor_up(1)
end
move_cursor_up(all_height - 1)
else
move_cursor_up(all_height - 1)
end
@highest_in_all = all_height
back = 0
modify_lines(new_lines).each_with_index do |line, index|
if @prompt_proc
prompt = prompt_list[index]
prompt_width = calculate_width(prompt, true)
end
height = render_partial(prompt, prompt_width, line, false)
if index < (new_lines.size - 1)
scroll_down(1)
back += height
else
back += height - 1
end
end
move_cursor_up(back)
if @previous_line_index
@buffer_of_lines[@previous_line_index] = @line
@line = @buffer_of_lines[@line_index]
end
@first_line_started_from =
if @line_index.zero?
0
else
@buffer_of_lines[0..(@line_index - 1)].inject(0) { |result, line|
result + calculate_height_by_width(prompt_width + calculate_width(line)) # TODO prompt_list
}
end
if @prompt_proc
prompt = prompt_list[@line_index]
prompt_width = calculate_width(prompt, true)
end
move_cursor_down(@first_line_started_from)
calculate_nearest_cursor
@started_from = calculate_height_by_width(prompt_width + @cursor) - 1
move_cursor_down(@started_from)
Reline::IOGate.move_cursor_column((prompt_width + @cursor) % @screen_size.last)
@highest_in_this = calculate_height_by_width(prompt_width + @cursor_max)
@previous_line_index = nil
rendered = true
elsif @rerender_all
move_cursor_up(@first_line_started_from + @started_from)
Reline::IOGate.move_cursor_column(0)
back = 0
new_buffer = whole_lines
prompt_list = nil
if @prompt_proc
prompt_list = @prompt_proc.(new_buffer)
prompt = prompt_list[@line_index]
prompt_width = calculate_width(prompt, true)
end
new_buffer.each_with_index do |line, index|
prompt_width = calculate_width(prompt_list[index], true) if @prompt_proc
width = prompt_width + calculate_width(line)
height = calculate_height_by_width(width)
back += height
end
if back > @highest_in_all
scroll_down(back - 1)
move_cursor_up(back - 1)
elsif back < @highest_in_all
scroll_down(back)
Reline::IOGate.erase_after_cursor
(@highest_in_all - back - 1).times do
scroll_down(1)
Reline::IOGate.erase_after_cursor
end
move_cursor_up(@highest_in_all - 1)
end
modify_lines(new_buffer).each_with_index do |line, index|
if @prompt_proc
prompt = prompt_list[index]
prompt_width = calculate_width(prompt, true)
end
render_partial(prompt, prompt_width, line, false)
if index < (new_buffer.size - 1)
move_cursor_down(1)
end
end
move_cursor_up(back - 1)
if @prompt_proc
prompt = prompt_list[@line_index]
prompt_width = calculate_width(prompt, true)
end
@highest_in_all = back
@highest_in_this = calculate_height_by_width(prompt_width + @cursor_max)
@first_line_started_from =
if @line_index.zero?
0
else
new_buffer[0..(@line_index - 1)].inject(0) { |result, line|
result + calculate_height_by_width(prompt_width + calculate_width(line)) # TODO prompt_list
}
end
@started_from = calculate_height_by_width(prompt_width + @cursor) - 1
move_cursor_down(@first_line_started_from + @started_from)
Reline::IOGate.move_cursor_column((prompt_width + @cursor) % @screen_size.last)
@rerender_all = false
rendered = true
end
line = modify_lines(whole_lines)[@line_index]
if @is_multiline
prompt_list = nil
if @prompt_proc
prompt_list = @prompt_proc.(whole_lines)
prompt = prompt_list[@line_index]
prompt_width = calculate_width(prompt, true)
end
if finished?
# Always rerender on finish because output_modifier_proc may return a different output.
render_partial(prompt, prompt_width, line)
scroll_down(1)
Reline::IOGate.move_cursor_column(0)
Reline::IOGate.erase_after_cursor
elsif not rendered
render_partial(prompt, prompt_width, line)
end
else
render_partial(prompt, prompt_width, line)
if finished?
scroll_down(1)
Reline::IOGate.move_cursor_column(0)
Reline::IOGate.erase_after_cursor
end
end
end
private def render_partial(prompt, prompt_width, line_to_render, with_control = true)
visual_lines, height = split_by_width(prompt, line_to_render.nil? ? '' : line_to_render, @screen_size.last)
if with_control
if height > @highest_in_this
diff = height - @highest_in_this
scroll_down(diff)
@highest_in_all += diff
@highest_in_this = height
move_cursor_up(diff)
elsif height < @highest_in_this
diff = @highest_in_this - height
@highest_in_all -= diff
@highest_in_this = height
end
move_cursor_up(@started_from)
@started_from = calculate_height_by_width(prompt_width + @cursor) - 1
end
Reline::IOGate.move_cursor_column(0)
visual_lines.each_with_index do |line, index|
if line.nil?
Reline::IOGate.erase_after_cursor
move_cursor_down(1)
Reline::IOGate.move_cursor_column(0)
next
end
@output.print line
if @first_prompt
@first_prompt = false
@pre_input_hook&.call
end
end
Reline::IOGate.erase_after_cursor
if with_control
move_cursor_up(height - 1)
if finished?
move_cursor_down(@started_from)
end
move_cursor_down(@started_from)
Reline::IOGate.move_cursor_column((prompt_width + @cursor) % @screen_size.last)
end
height
end
private def modify_lines(before)
return before if before.nil? || before.empty?
if after = @output_modifier_proc&.call("#{before.join("\n")}\n", complete: finished?)
after.lines(chomp: true)
else
before
end
end
def editing_mode
@config.editing_mode
end
private def menu(target, list)
@menu_info = MenuInfo.new(target, list)
end
private def complete_internal_proc(list, is_menu)
preposing, target, postposing = retrieve_completion_block
list = list.select { |i|
if i and i.encoding != Encoding::US_ASCII and i.encoding != @encoding
raise Encoding::CompatibilityError
end
i&.start_with?(target)
}
if is_menu
menu(target, list)
return nil
end
completed = list.inject { |memo, item|
begin
memo_mbchars = memo.unicode_normalize.grapheme_clusters
item_mbchars = item.unicode_normalize.grapheme_clusters
rescue Encoding::CompatibilityError
memo_mbchars = memo.grapheme_clusters
item_mbchars = item.grapheme_clusters
end
size = [memo_mbchars.size, item_mbchars.size].min
result = ''
size.times do |i|
if memo_mbchars[i] == item_mbchars[i]
result << memo_mbchars[i]
else
break
end
end
result
}
[target, preposing, completed, postposing]
end
private def complete(list)
case @completion_state
when CompletionState::NORMAL, CompletionState::JOURNEY
@completion_state = CompletionState::COMPLETION
when CompletionState::PERFECT_MATCH
@dig_perfect_match_proc&.(@perfect_matched)
end
is_menu = (@completion_state == CompletionState::MENU)
result = complete_internal_proc(list, is_menu)
return if result.nil?
target, preposing, completed, postposing = result
return if completed.nil?
if target <= completed and (@completion_state == CompletionState::COMPLETION or @completion_state == CompletionState::PERFECT_MATCH)
@completion_state = CompletionState::MENU
if list.include?(completed)
@completion_state = CompletionState::PERFECT_MATCH
@perfect_matched = completed
end
if target < completed
@line = preposing + completed + postposing
line_to_pointer = preposing + completed
@cursor_max = calculate_width(@line)
@cursor = calculate_width(line_to_pointer)
@byte_pointer = line_to_pointer.bytesize
end
end
end
private def move_completed_list(list, direction)
case @completion_state
when CompletionState::NORMAL, CompletionState::COMPLETION, CompletionState::MENU
@completion_state = CompletionState::JOURNEY
result = retrieve_completion_block
return if result.nil?
preposing, target, postposing = result
@completion_journey_data = CompletionJourneyData.new(
preposing, postposing,
[target] + list.select{ |item| item.start_with?(target) }, 0)
@completion_state = CompletionState::JOURNEY
else
case direction
when :up
@completion_journey_data.pointer -= 1
if @completion_journey_data.pointer < 0
@completion_journey_data.pointer = @completion_journey_data.list.size - 1
end
when :down
@completion_journey_data.pointer += 1
if @completion_journey_data.pointer >= @completion_journey_data.list.size
@completion_journey_data.pointer = 0
end
end
completed = @completion_journey_data.list[@completion_journey_data.pointer]
@line = @completion_journey_data.preposing + completed + @completion_journey_data.postposing
line_to_pointer = @completion_journey_data.preposing + completed
@cursor_max = calculate_width(@line)
@cursor = calculate_width(line_to_pointer)
@byte_pointer = line_to_pointer.bytesize
end
end
private def run_for_operators(key, method_symbol, &block)
if @waiting_operator_proc
if VI_MOTIONS.include?(method_symbol)
old_cursor, old_byte_pointer = @cursor, @byte_pointer
block.()
unless @waiting_proc
cursor_diff, byte_pointer_diff = @cursor - old_cursor, @byte_pointer - old_byte_pointer
@cursor, @byte_pointer = old_cursor, old_byte_pointer
@waiting_operator_proc.(cursor_diff, byte_pointer_diff)
else
old_waiting_proc = @waiting_proc
old_waiting_operator_proc = @waiting_operator_proc
@waiting_proc = proc { |key|
old_cursor, old_byte_pointer = @cursor, @byte_pointer
old_waiting_proc.(key)
cursor_diff, byte_pointer_diff = @cursor - old_cursor, @byte_pointer - old_byte_pointer
@cursor, @byte_pointer = old_cursor, old_byte_pointer
@waiting_operator_proc.(cursor_diff, byte_pointer_diff)
@waiting_operator_proc = old_waiting_operator_proc
}
end
else
# Ignores operator when not motion is given.
block.()
end
@waiting_operator_proc = nil
else
block.()
end
end
private def argumentable?(method_obj)
method_obj and method_obj.parameters.length != 1
end
private def process_key(key, method_symbol)
if method_symbol and respond_to?(method_symbol, true)
method_obj = method(method_symbol)
else
method_obj = nil
end
if method_symbol and key.is_a?(Symbol)
if @vi_arg and argumentable?(method_obj)
run_for_operators(key, method_symbol) do
method_obj.(key, arg: @vi_arg)
end
else
method_obj&.(key)
end
@kill_ring.process
@vi_arg = nil
elsif @vi_arg
if key.chr =~ /[0-9]/
ed_argument_digit(key)
else
if argumentable?(method_obj)
run_for_operators(key, method_symbol) do
method_obj.(key, arg: @vi_arg)
end
elsif @waiting_proc
@waiting_proc.(key)
elsif method_obj
method_obj.(key)
else
ed_insert(key)
end
@kill_ring.process
@vi_arg = nil
end
elsif @waiting_proc
@waiting_proc.(key)
@kill_ring.process
elsif method_obj
if method_symbol == :ed_argument_digit
method_obj.(key)
else
run_for_operators(key, method_symbol) do
method_obj.(key)
end
end
@kill_ring.process
else
ed_insert(key)
end
end
private def normal_char(key)
method_symbol = method_obj = nil
if key.combined_char.is_a?(Symbol)
process_key(key.combined_char, key.combined_char)
return
end
@multibyte_buffer << key.combined_char
if @multibyte_buffer.size > 1
if @multibyte_buffer.dup.force_encoding(@encoding).valid_encoding?
process_key(@multibyte_buffer.dup.force_encoding(@encoding), nil)
@multibyte_buffer.clear
else
# invalid
return
end
else # single byte
return if key.char >= 128 # maybe, first byte of multi byte
method_symbol = @config.editing_mode.get_method(key.combined_char)
if key.with_meta and method_symbol == :ed_unassigned
# split ESC + key
method_symbol = @config.editing_mode.get_method("\e".ord)
process_key("\e".ord, method_symbol)
method_symbol = @config.editing_mode.get_method(key.char)
process_key(key.char, method_symbol)
else
process_key(key.combined_char, method_symbol)
end
@multibyte_buffer.clear
end
if @config.editing_mode_is?(:vi_command) and @cursor > 0 and @cursor == @cursor_max
byte_size = Reline::Unicode.get_prev_mbchar_size(@line, @byte_pointer)
@byte_pointer -= byte_size
mbchar = @line.byteslice(@byte_pointer, byte_size)
width = Reline::Unicode.get_mbchar_width(mbchar)
@cursor -= width
end
end
def input_key(key)
if key.nil? or key.char.nil?
if @first_char
@line = nil
end
finish
return
end
@first_char = false
completion_occurs = false
if @config.editing_mode_is?(:emacs, :vi_insert) and key.char == "\C-i".ord
result = retrieve_completion_block
slice = result[1]
result = @completion_proc.(slice) if @completion_proc and slice
if result.is_a?(Array)
completion_occurs = true
complete(result)
end
elsif @config.editing_mode_is?(:vi_insert) and ["\C-p".ord, "\C-n".ord].include?(key.char)
result = retrieve_completion_block
slice = result[1]
result = @completion_proc.(slice) if @completion_proc and slice
if result.is_a?(Array)
completion_occurs = true
move_completed_list(result, "\C-p".ord == key.char ? :up : :down)
end
elsif Symbol === key.char and respond_to?(key.char, true)
process_key(key.char, key.char)
else
normal_char(key)
end
unless completion_occurs
@completion_state = CompletionState::NORMAL
end
if @is_multiline and @auto_indent_proc
process_auto_indent
end
end
private def process_auto_indent
return if not @check_new_auto_indent and @previous_line_index # move cursor up or down
if @previous_line_index
new_lines = whole_lines(index: @previous_line_index, line: @line)
else
new_lines = whole_lines
end
new_indent = @auto_indent_proc.(new_lines, @line_index, @byte_pointer, @check_new_auto_indent)
if new_indent
md = new_lines[@line_index].match(/\A */)
prev_indent = md[0].count(' ')
if @check_new_auto_indent
@buffer_of_lines[@line_index] = ' ' * new_indent + @buffer_of_lines[@line_index].gsub(/\A */, '')
@cursor = new_indent
@byte_pointer = new_indent
else
@line = ' ' * new_indent + @line.gsub(/\A */, '')
@cursor += new_indent - prev_indent
@byte_pointer += new_indent - prev_indent
end
end
@check_new_auto_indent = false
end
def retrieve_completion_block
word_break_regexp = /\A[#{Regexp.escape(Reline.completer_word_break_characters)}]/
quote_characters_regexp = /\A[#{Regexp.escape(Reline.completer_quote_characters)}]/
before = @line.byteslice(0, @byte_pointer)
rest = nil
break_pointer = nil
quote = nil
i = 0
while i < @byte_pointer do
slice = @line.byteslice(i, @byte_pointer - i)
if quote and slice.start_with?(/(?!\\)#{Regexp.escape(quote)}/) # closing "
quote = nil
i += 1
elsif quote and slice.start_with?(/\\#{Regexp.escape(quote)}/) # escaped \"
# skip
i += 2
elsif slice =~ quote_characters_regexp # find new "
quote = $&
i += 1
elsif not quote and slice =~ word_break_regexp
rest = $'
i += 1
break_pointer = i
else
i += 1
end
end
if rest
preposing = @line.byteslice(0, break_pointer)
target = rest
else
preposing = ''
target = before
end
postposing = @line.byteslice(@byte_pointer, @line.bytesize - @byte_pointer)
[preposing, target, postposing]
end
def confirm_multiline_termination
temp_buffer = @buffer_of_lines.dup
if @previous_line_index and @line_index == (@buffer_of_lines.size - 1)
temp_buffer[@previous_line_index] = @line
else
temp_buffer[@line_index] = @line
end
if temp_buffer.any?{ |l| l.chomp != '' }
@confirm_multiline_termination_proc.(temp_buffer.join("\n") + "\n")
else
false
end
end
def insert_text(text)
width = calculate_width(text)
if @cursor == @cursor_max
@line += text
else
@line = byteinsert(@line, @byte_pointer, text)
end
@byte_pointer += text.bytesize
@cursor += width
@cursor_max += width
end
def delete_text(start = nil, length = nil)
if start.nil? and length.nil?
@line&.clear
@byte_pointer = 0
@cursor = 0
@cursor_max = 0
elsif not start.nil? and not length.nil?
if @line
before = @line.byteslice(0, start)
after = @line.byteslice(start + length, @line.bytesize)
@line = before + after
@byte_pointer = @line.bytesize if @byte_pointer > @line.bytesize
str = @line.byteslice(0, @byte_pointer)
@cursor = calculate_width(str)
@cursor_max = calculate_width(@line)
end
elsif start.is_a?(Range)
range = start
first = range.first
last = range.last
last = @line.bytesize - 1 if last > @line.bytesize
last += @line.bytesize if last < 0
first += @line.bytesize if first < 0
range = range.exclude_end? ? first...last : first..last
@line = @line.bytes.reject.with_index{ |c, i| range.include?(i) }.map{ |c| c.chr(Encoding::ASCII_8BIT) }.join.force_encoding(@encoding)
@byte_pointer = @line.bytesize if @byte_pointer > @line.bytesize
str = @line.byteslice(0, @byte_pointer)
@cursor = calculate_width(str)
@cursor_max = calculate_width(@line)
else
@line = @line.byteslice(0, start)
@byte_pointer = @line.bytesize if @byte_pointer > @line.bytesize
str = @line.byteslice(0, @byte_pointer)
@cursor = calculate_width(str)
@cursor_max = calculate_width(@line)
end
end
def byte_pointer=(val)
@byte_pointer = val
str = @line.byteslice(0, @byte_pointer)
@cursor = calculate_width(str)
@cursor_max = calculate_width(@line)
end
def whole_lines(index: @line_index, line: @line)
temp_lines = @buffer_of_lines.dup
temp_lines[index] = line
temp_lines
end
def whole_buffer
if @buffer_of_lines.size == 1 and @line.nil?
nil
else
whole_lines.join("\n")
end
end
def finished?
@finished
end
def finish
@finished = true
@config.reset
end
private def byteslice!(str, byte_pointer, size)
new_str = str.byteslice(0, byte_pointer)
new_str << str.byteslice(byte_pointer + size, str.bytesize)
[new_str, str.byteslice(byte_pointer, size)]
end
private def byteinsert(str, byte_pointer, other)
new_str = str.byteslice(0, byte_pointer)
new_str << other
new_str << str.byteslice(byte_pointer, str.bytesize)
new_str
end
private def calculate_width(str, allow_escape_code = false)
if allow_escape_code
width = 0
rest = str.encode(Encoding::UTF_8)
in_zero_width = false
loop do
break if rest.empty?
if rest.start_with?(NON_PRINTING_START)
rest.delete_prefix!(NON_PRINTING_START)
in_zero_width = true
elsif rest.start_with?(NON_PRINTING_END)
rest.delete_prefix!(NON_PRINTING_END)
in_zero_width = false
elsif rest.start_with?(CSI_REGEXP)
rest = $'
elsif rest.start_with?(OSC_REGEXP)
rest = $'
else
gcs = rest.grapheme_clusters
gc = gcs.first
rest = gcs[1..-1].join
if in_zero_width
mbchar_width = 0
else
mbchar_width = Reline::Unicode.get_mbchar_width(gc)
end
width += mbchar_width
end
end
width
else
str.encode(Encoding::UTF_8).grapheme_clusters.inject(0) { |width, gc|
width + Reline::Unicode.get_mbchar_width(gc)
}
end
end
private def key_delete(key)
if @config.editing_mode_is?(:vi_insert, :emacs)
ed_delete_next_char(key)
end
end
private def key_newline(key)
if @is_multiline
next_line = @line.byteslice(@byte_pointer, @line.bytesize - @byte_pointer)
cursor_line = @line.byteslice(0, @byte_pointer)
insert_new_line(cursor_line, next_line)
@cursor = 0
@check_new_auto_indent = true
end
end
private def ed_insert(key)
if key.instance_of?(String)
width = Reline::Unicode.get_mbchar_width(key)
if @cursor == @cursor_max
@line += key
else
@line = byteinsert(@line, @byte_pointer, key)
end
@byte_pointer += key.bytesize
@cursor += width
@cursor_max += width
else
if @cursor == @cursor_max
@line += key.chr
else
@line = byteinsert(@line, @byte_pointer, key.chr)
end
width = Reline::Unicode.get_mbchar_width(key.chr)
@byte_pointer += 1
@cursor += width
@cursor_max += width
end
end
alias_method :ed_digit, :ed_insert
alias_method :self_insert, :ed_insert
private def ed_quoted_insert(str, arg: 1)
@waiting_proc = proc { |key|
arg.times do
if key == "\C-j".ord or key == "\C-m".ord
key_newline(key)
else
ed_insert(key)
end
end
@waiting_proc = nil
}
end
alias_method :quoted_insert, :ed_quoted_insert
private def ed_next_char(key, arg: 1)
byte_size = Reline::Unicode.get_next_mbchar_size(@line, @byte_pointer)
if (@byte_pointer < @line.bytesize)
mbchar = @line.byteslice(@byte_pointer, byte_size)
width = Reline::Unicode.get_mbchar_width(mbchar)
@cursor += width if width
@byte_pointer += byte_size
elsif @is_multiline and @config.editing_mode_is?(:emacs) and @byte_pointer == @line.bytesize and @line_index < @buffer_of_lines.size - 1
next_line = @buffer_of_lines[@line_index + 1]
@cursor = 0
@byte_pointer = 0
@cursor_max = calculate_width(next_line)
@previous_line_index = @line_index
@line_index += 1
end
arg -= 1
ed_next_char(key, arg: arg) if arg > 0
end
alias_method :forward_char, :ed_next_char
private def ed_prev_char(key, arg: 1)
if @cursor > 0
byte_size = Reline::Unicode.get_prev_mbchar_size(@line, @byte_pointer)
@byte_pointer -= byte_size
mbchar = @line.byteslice(@byte_pointer, byte_size)
width = Reline::Unicode.get_mbchar_width(mbchar)
@cursor -= width
elsif @is_multiline and @config.editing_mode_is?(:emacs) and @byte_pointer == 0 and @line_index > 0
prev_line = @buffer_of_lines[@line_index - 1]
@cursor = calculate_width(prev_line)
@byte_pointer = prev_line.bytesize
@cursor_max = calculate_width(prev_line)
@previous_line_index = @line_index
@line_index -= 1
end
arg -= 1
ed_prev_char(key, arg: arg) if arg > 0
end
private def vi_first_print(key)
@byte_pointer, @cursor = Reline::Unicode.vi_first_print(@line)
end
private def ed_move_to_beg(key)
@byte_pointer = @cursor = 0
end
alias_method :beginning_of_line, :ed_move_to_beg
private def ed_move_to_end(key)
@byte_pointer = 0
@cursor = 0
byte_size = 0
while @byte_pointer < @line.bytesize
byte_size = Reline::Unicode.get_next_mbchar_size(@line, @byte_pointer)
if byte_size > 0
mbchar = @line.byteslice(@byte_pointer, byte_size)
@cursor += Reline::Unicode.get_mbchar_width(mbchar)
end
@byte_pointer += byte_size
end
end
alias_method :end_of_line, :ed_move_to_end
private def ed_search_prev_history(key)
@line_backup_in_history = @line
searcher = Fiber.new do
search_word = String.new(encoding: @encoding)
multibyte_buf = String.new(encoding: 'ASCII-8BIT')
last_hit = nil
loop do
key = Fiber.yield(search_word)
case key
when "\C-h".ord, 127
grapheme_clusters = search_word.grapheme_clusters
if grapheme_clusters.size > 0
grapheme_clusters.pop
search_word = grapheme_clusters.join
end
else
multibyte_buf << key
if multibyte_buf.dup.force_encoding(@encoding).valid_encoding?
search_word << multibyte_buf.dup.force_encoding(@encoding)
multibyte_buf.clear
end
end
hit = nil
if @line_backup_in_history.include?(search_word)
@history_pointer = nil
hit = @line_backup_in_history
else
hit_index = Reline::HISTORY.rindex { |item|
item.include?(search_word)
}
if hit_index
@history_pointer = hit_index
hit = Reline::HISTORY[@history_pointer]
end
end
if hit
@searching_prompt = "(reverse-i-search)`%s': %s" % [search_word, hit]
@line = hit
last_hit = hit
else
@searching_prompt = "(failed reverse-i-search)`%s': %s" % [search_word, last_hit]
end
end
end
searcher.resume
@searching_prompt = "(reverse-i-search)`': "
@waiting_proc = ->(key) {
case key
when "\C-j".ord, "\C-?".ord
if @history_pointer
@line = Reline::HISTORY[@history_pointer]
else
@line = @line_backup_in_history
end
@searching_prompt = nil
@waiting_proc = nil
@cursor_max = calculate_width(@line)
@cursor = @byte_pointer = 0
when "\C-g".ord
@line = @line_backup_in_history
@history_pointer = nil
@searching_prompt = nil
@waiting_proc = nil
@line_backup_in_history = nil
@cursor_max = calculate_width(@line)
@cursor = @byte_pointer = 0
else
chr = key.is_a?(String) ? key : key.chr(Encoding::ASCII_8BIT)
if chr.match?(/[[:print:]]/)
searcher.resume(key)
else
if @history_pointer
@line = Reline::HISTORY[@history_pointer]
else
@line = @line_backup_in_history
end
@searching_prompt = nil
@waiting_proc = nil
@cursor_max = calculate_width(@line)
@cursor = @byte_pointer = 0
end
end
}
end
private def ed_search_next_history(key)
end
private def ed_prev_history(key, arg: 1)
if @is_multiline and @line_index > 0
@previous_line_index = @line_index
@line_index -= 1
return
end
if Reline::HISTORY.empty?
return
end
if @history_pointer.nil?
@history_pointer = Reline::HISTORY.size - 1
if @is_multiline
@line_backup_in_history = whole_buffer
@buffer_of_lines = Reline::HISTORY[@history_pointer].split("\n")
@buffer_of_lines = [String.new(encoding: @encoding)] if @buffer_of_lines.empty?
@line_index = @buffer_of_lines.size - 1
@line = @buffer_of_lines.last
@rerender_all = true
else
@line_backup_in_history = @line
@line = Reline::HISTORY[@history_pointer]
end
elsif @history_pointer.zero?
return
else
if @is_multiline
Reline::HISTORY[@history_pointer] = whole_buffer
@history_pointer -= 1
@buffer_of_lines = Reline::HISTORY[@history_pointer].split("\n")
@buffer_of_lines = [String.new(encoding: @encoding)] if @buffer_of_lines.empty?
@line_index = @buffer_of_lines.size - 1
@line = @buffer_of_lines.last
@rerender_all = true
else
Reline::HISTORY[@history_pointer] = @line
@history_pointer -= 1
@line = Reline::HISTORY[@history_pointer]
end
end
if @config.editing_mode_is?(:emacs)
@cursor_max = @cursor = calculate_width(@line)
@byte_pointer = @line.bytesize
elsif @config.editing_mode_is?(:vi_command)
@byte_pointer = @cursor = 0
@cursor_max = calculate_width(@line)
end
arg -= 1
ed_prev_history(key, arg: arg) if arg > 0
end
private def ed_next_history(key, arg: 1)
if @is_multiline and @line_index < (@buffer_of_lines.size - 1)
@previous_line_index = @line_index
@line_index += 1
return
end
if @history_pointer.nil?
return
elsif @history_pointer == (Reline::HISTORY.size - 1)
if @is_multiline
@history_pointer = nil
@buffer_of_lines = @line_backup_in_history.split("\n")
@buffer_of_lines = [String.new(encoding: @encoding)] if @buffer_of_lines.empty?
@line_index = 0
@line = @buffer_of_lines.first
@rerender_all = true
else
@history_pointer = nil
@line = @line_backup_in_history
end
else
if @is_multiline
Reline::HISTORY[@history_pointer] = whole_buffer
@history_pointer += 1
@buffer_of_lines = Reline::HISTORY[@history_pointer].split("\n")
@buffer_of_lines = [String.new(encoding: @encoding)] if @buffer_of_lines.empty?
@line_index = 0
@line = @buffer_of_lines.first
@rerender_all = true
else
Reline::HISTORY[@history_pointer] = @line
@history_pointer += 1
@line = Reline::HISTORY[@history_pointer]
end
end
@line = '' unless @line
if @config.editing_mode_is?(:emacs)
@cursor_max = @cursor = calculate_width(@line)
@byte_pointer = @line.bytesize
elsif @config.editing_mode_is?(:vi_command)
@byte_pointer = @cursor = 0
@cursor_max = calculate_width(@line)
end
arg -= 1
ed_next_history(key, arg: arg) if arg > 0
end
private def ed_newline(key)
if @is_multiline
if @config.editing_mode_is?(:vi_command)
if @line_index < (@buffer_of_lines.size - 1)
ed_next_history(key) # means cursor down
else
# should check confirm_multiline_termination to finish?
finish
end
else
if @line_index == (@buffer_of_lines.size - 1)
if confirm_multiline_termination
finish
else
key_newline(key)
end
else
# should check confirm_multiline_termination to finish?
@previous_line_index = @line_index
@line_index = @buffer_of_lines.size - 1
finish
end
end
else
if @history_pointer
Reline::HISTORY[@history_pointer] = @line
@history_pointer = nil
end
finish
end
end
private def em_delete_prev_char(key)
if @is_multiline and @cursor == 0 and @line_index > 0
@buffer_of_lines[@line_index] = @line
@cursor = calculate_width(@buffer_of_lines[@line_index - 1])
@byte_pointer = @buffer_of_lines[@line_index - 1].bytesize
@buffer_of_lines[@line_index - 1] += @buffer_of_lines.delete_at(@line_index)
@line_index -= 1
@line = @buffer_of_lines[@line_index]
@cursor_max = calculate_width(@line)
@rerender_all = true
elsif @cursor > 0
byte_size = Reline::Unicode.get_prev_mbchar_size(@line, @byte_pointer)
@byte_pointer -= byte_size
@line, mbchar = byteslice!(@line, @byte_pointer, byte_size)
width = Reline::Unicode.get_mbchar_width(mbchar)
@cursor -= width
@cursor_max -= width
end
end
alias_method :backward_delete_char, :em_delete_prev_char
private def ed_kill_line(key)
if @line.bytesize > @byte_pointer
@line, deleted = byteslice!(@line, @byte_pointer, @line.bytesize - @byte_pointer)
@byte_pointer = @line.bytesize
@cursor = @cursor_max = calculate_width(@line)
@kill_ring.append(deleted)
end
end
private def em_kill_line(key)
if @byte_pointer > 0
@line, deleted = byteslice!(@line, 0, @byte_pointer)
@byte_pointer = 0
@kill_ring.append(deleted, true)
@cursor_max = calculate_width(@line)
@cursor = 0
end
end
private def em_delete_or_list(key)
if (not @is_multiline and @line.empty?) or (@is_multiline and @line.empty? and @buffer_of_lines.size == 1)
@line = nil
if @buffer_of_lines.size > 1
scroll_down(@highest_in_all - @first_line_started_from)
end
Reline::IOGate.move_cursor_column(0)
@eof = true
finish
elsif @byte_pointer < @line.bytesize
splitted_last = @line.byteslice(@byte_pointer, @line.bytesize)
mbchar = splitted_last.grapheme_clusters.first
width = Reline::Unicode.get_mbchar_width(mbchar)
@cursor_max -= width
@line, = byteslice!(@line, @byte_pointer, mbchar.bytesize)
elsif @is_multiline and @byte_pointer == @line.bytesize and @buffer_of_lines.size > @line_index + 1
@cursor = calculate_width(@line)
@byte_pointer = @line.bytesize
@line += @buffer_of_lines.delete_at(@line_index + 1)
@cursor_max = calculate_width(@line)
@buffer_of_lines[@line_index] = @line
@rerender_all = true
@rest_height += 1
end
end
alias_method :delete_char, :em_delete_or_list
private def em_yank(key)
yanked = @kill_ring.yank
if yanked
@line = byteinsert(@line, @byte_pointer, yanked)
yanked_width = calculate_width(yanked)
@cursor += yanked_width
@cursor_max += yanked_width
@byte_pointer += yanked.bytesize
end
end
private def em_yank_pop(key)
yanked, prev_yank = @kill_ring.yank_pop
if yanked
prev_yank_width = calculate_width(prev_yank)
@cursor -= prev_yank_width
@cursor_max -= prev_yank_width
@byte_pointer -= prev_yank.bytesize
@line, = byteslice!(@line, @byte_pointer, prev_yank.bytesize)
@line = byteinsert(@line, @byte_pointer, yanked)
yanked_width = calculate_width(yanked)
@cursor += yanked_width
@cursor_max += yanked_width
@byte_pointer += yanked.bytesize
end
end
private def ed_clear_screen(key)
@cleared = true
end
alias_method :clear_screen, :ed_clear_screen
private def em_next_word(key)
if @line.bytesize > @byte_pointer
byte_size, width = Reline::Unicode.em_forward_word(@line, @byte_pointer)
@byte_pointer += byte_size
@cursor += width
end
end
alias_method :forward_word, :em_next_word
private def ed_prev_word(key)
if @byte_pointer > 0
byte_size, width = Reline::Unicode.em_backward_word(@line, @byte_pointer)
@byte_pointer -= byte_size
@cursor -= width
end
end
alias_method :backward_word, :ed_prev_word
private def em_delete_next_word(key)
if @line.bytesize > @byte_pointer
byte_size, width = Reline::Unicode.em_forward_word(@line, @byte_pointer)
@line, word = byteslice!(@line, @byte_pointer, byte_size)
@kill_ring.append(word)
@cursor_max -= width
end
end
private def ed_delete_prev_word(key)
if @byte_pointer > 0
byte_size, width = Reline::Unicode.em_backward_word(@line, @byte_pointer)
@line, word = byteslice!(@line, @byte_pointer - byte_size, byte_size)
@kill_ring.append(word, true)
@byte_pointer -= byte_size
@cursor -= width
@cursor_max -= width
end
end
private def ed_transpose_chars(key)
if @byte_pointer > 0
if @cursor_max > @cursor
byte_size = Reline::Unicode.get_next_mbchar_size(@line, @byte_pointer)
mbchar = @line.byteslice(@byte_pointer, byte_size)
width = Reline::Unicode.get_mbchar_width(mbchar)
@cursor += width
@byte_pointer += byte_size
end
back1_byte_size = Reline::Unicode.get_prev_mbchar_size(@line, @byte_pointer)
if (@byte_pointer - back1_byte_size) > 0
back2_byte_size = Reline::Unicode.get_prev_mbchar_size(@line, @byte_pointer - back1_byte_size)
back2_pointer = @byte_pointer - back1_byte_size - back2_byte_size
@line, back2_mbchar = byteslice!(@line, back2_pointer, back2_byte_size)
@line = byteinsert(@line, @byte_pointer - back2_byte_size, back2_mbchar)
end
end
end
alias_method :transpose_chars, :ed_transpose_chars
private def ed_transpose_words(key)
left_word_start, middle_start, right_word_start, after_start = Reline::Unicode.ed_transpose_words(@line, @byte_pointer)
before = @line.byteslice(0, left_word_start)
left_word = @line.byteslice(left_word_start, middle_start - left_word_start)
middle = @line.byteslice(middle_start, right_word_start - middle_start)
right_word = @line.byteslice(right_word_start, after_start - right_word_start)
after = @line.byteslice(after_start, @line.bytesize - after_start)
return if left_word.empty? or right_word.empty?
@line = before + right_word + middle + left_word + after
from_head_to_left_word = before + right_word + middle + left_word
@byte_pointer = from_head_to_left_word.bytesize
@cursor = calculate_width(from_head_to_left_word)
end
alias_method :transpose_words, :ed_transpose_words
private def em_capitol_case(key)
if @line.bytesize > @byte_pointer
byte_size, _, new_str = Reline::Unicode.em_forward_word_with_capitalization(@line, @byte_pointer)
before = @line.byteslice(0, @byte_pointer)
after = @line.byteslice((@byte_pointer + byte_size)..-1)
@line = before + new_str + after
@byte_pointer += new_str.bytesize
@cursor += calculate_width(new_str)
end
end
alias_method :capitalize_word, :em_capitol_case
private def em_lower_case(key)
if @line.bytesize > @byte_pointer
byte_size, = Reline::Unicode.em_forward_word(@line, @byte_pointer)
part = @line.byteslice(@byte_pointer, byte_size).grapheme_clusters.map { |mbchar|
mbchar =~ /[A-Z]/ ? mbchar.downcase : mbchar
}.join
rest = @line.byteslice((@byte_pointer + byte_size)..-1)
@line = @line.byteslice(0, @byte_pointer) + part
@byte_pointer = @line.bytesize
@cursor = calculate_width(@line)
@cursor_max = @cursor + calculate_width(rest)
@line += rest
end
end
alias_method :downcase_word, :em_lower_case
private def em_upper_case(key)
if @line.bytesize > @byte_pointer
byte_size, = Reline::Unicode.em_forward_word(@line, @byte_pointer)
part = @line.byteslice(@byte_pointer, byte_size).grapheme_clusters.map { |mbchar|
mbchar =~ /[a-z]/ ? mbchar.upcase : mbchar
}.join
rest = @line.byteslice((@byte_pointer + byte_size)..-1)
@line = @line.byteslice(0, @byte_pointer) + part
@byte_pointer = @line.bytesize
@cursor = calculate_width(@line)
@cursor_max = @cursor + calculate_width(rest)
@line += rest
end
end
alias_method :upcase_word, :em_upper_case
private def em_kill_region(key)
if @byte_pointer > 0
byte_size, width = Reline::Unicode.em_big_backward_word(@line, @byte_pointer)
@line, deleted = byteslice!(@line, @byte_pointer - byte_size, byte_size)
@byte_pointer -= byte_size
@cursor -= width
@cursor_max -= width
@kill_ring.append(deleted)
end
end
private def copy_for_vi(text)
if @config.editing_mode_is?(:vi_insert) or @config.editing_mode_is?(:vi_command)
@vi_clipboard = text
end
end
private def vi_insert(key)
@config.editing_mode = :vi_insert
end
private def vi_add(key)
@config.editing_mode = :vi_insert
ed_next_char(key)
end
private def vi_command_mode(key)
ed_prev_char(key)
@config.editing_mode = :vi_command
end
alias_method :backward_char, :ed_prev_char
private def vi_next_word(key, arg: 1)
if @line.bytesize > @byte_pointer
byte_size, width = Reline::Unicode.vi_forward_word(@line, @byte_pointer)
@byte_pointer += byte_size
@cursor += width
end
arg -= 1
vi_next_word(key, arg: arg) if arg > 0
end
private def vi_prev_word(key, arg: 1)
if @byte_pointer > 0
byte_size, width = Reline::Unicode.vi_backward_word(@line, @byte_pointer)
@byte_pointer -= byte_size
@cursor -= width
end
arg -= 1
vi_prev_word(key, arg: arg) if arg > 0
end
private def vi_end_word(key, arg: 1)
if @line.bytesize > @byte_pointer
byte_size, width = Reline::Unicode.vi_forward_end_word(@line, @byte_pointer)
@byte_pointer += byte_size
@cursor += width
end
arg -= 1
vi_end_word(key, arg: arg) if arg > 0
end
private def vi_next_big_word(key, arg: 1)
if @line.bytesize > @byte_pointer
byte_size, width = Reline::Unicode.vi_big_forward_word(@line, @byte_pointer)
@byte_pointer += byte_size
@cursor += width
end
arg -= 1
vi_next_big_word(key, arg: arg) if arg > 0
end
private def vi_prev_big_word(key, arg: 1)
if @byte_pointer > 0
byte_size, width = Reline::Unicode.vi_big_backward_word(@line, @byte_pointer)
@byte_pointer -= byte_size
@cursor -= width
end
arg -= 1
vi_prev_big_word(key, arg: arg) if arg > 0
end
private def vi_end_big_word(key, arg: 1)
if @line.bytesize > @byte_pointer
byte_size, width = Reline::Unicode.vi_big_forward_end_word(@line, @byte_pointer)
@byte_pointer += byte_size
@cursor += width
end
arg -= 1
vi_end_big_word(key, arg: arg) if arg > 0
end
private def vi_delete_prev_char(key)
if @is_multiline and @cursor == 0 and @line_index > 0
@buffer_of_lines[@line_index] = @line
@cursor = calculate_width(@buffer_of_lines[@line_index - 1])
@byte_pointer = @buffer_of_lines[@line_index - 1].bytesize
@buffer_of_lines[@line_index - 1] += @buffer_of_lines.delete_at(@line_index)
@line_index -= 1
@line = @buffer_of_lines[@line_index]
@cursor_max = calculate_width(@line)
@rerender_all = true
elsif @cursor > 0
byte_size = Reline::Unicode.get_prev_mbchar_size(@line, @byte_pointer)
@byte_pointer -= byte_size
@line, mbchar = byteslice!(@line, @byte_pointer, byte_size)
width = Reline::Unicode.get_mbchar_width(mbchar)
@cursor -= width
@cursor_max -= width
end
end
private def ed_delete_prev_char(key, arg: 1)
deleted = ''
arg.times do
if @cursor > 0
byte_size = Reline::Unicode.get_prev_mbchar_size(@line, @byte_pointer)
@byte_pointer -= byte_size
@line, mbchar = byteslice!(@line, @byte_pointer, byte_size)
deleted.prepend(mbchar)
width = Reline::Unicode.get_mbchar_width(mbchar)
@cursor -= width
@cursor_max -= width
end
end
copy_for_vi(deleted)
end
private def vi_zero(key)
@byte_pointer = 0
@cursor = 0
end
private def vi_change_meta(key)
end
private def vi_delete_meta(key)
@waiting_operator_proc = proc { |cursor_diff, byte_pointer_diff|
if byte_pointer_diff > 0
@line, cut = byteslice!(@line, @byte_pointer, byte_pointer_diff)
elsif byte_pointer_diff < 0
@line, cut = byteslice!(@line, @byte_pointer + byte_pointer_diff, -byte_pointer_diff)
end
copy_for_vi(cut)
@cursor += cursor_diff if cursor_diff < 0
@cursor_max -= cursor_diff.abs
@byte_pointer += byte_pointer_diff if byte_pointer_diff < 0
}
end
private def vi_yank(key)
end
private def vi_end_of_transmission(key)
if @line.empty?
@line = nil
if @buffer_of_lines.size > 1
scroll_down(@highest_in_all - @first_line_started_from)
end
Reline::IOGate.move_cursor_column(0)
@eof = true
finish
end
end
private def vi_list_or_eof(key)
if (not @is_multiline and @line.empty?) or (@is_multiline and @line.empty? and @buffer_of_lines.size == 1)
@line = nil
if @buffer_of_lines.size > 1
scroll_down(@highest_in_all - @first_line_started_from)
end
Reline::IOGate.move_cursor_column(0)
@eof = true
finish
else
# TODO: list
end
end
private def ed_delete_next_char(key, arg: 1)
unless @line.empty?
byte_size = Reline::Unicode.get_next_mbchar_size(@line, @byte_pointer)
@line, mbchar = byteslice!(@line, @byte_pointer, byte_size)
copy_for_vi(mbchar)
width = Reline::Unicode.get_mbchar_width(mbchar)
@cursor_max -= width
if @cursor > 0 and @cursor >= @cursor_max
@byte_pointer -= byte_size
@cursor -= width
end
end
arg -= 1
ed_delete_next_char(key, arg: arg) if arg > 0
end
private def vi_to_history_line(key)
if Reline::HISTORY.empty?
return
end
if @history_pointer.nil?
@history_pointer = 0
@line_backup_in_history = @line
@line = Reline::HISTORY[@history_pointer]
@cursor_max = calculate_width(@line)
@cursor = 0
@byte_pointer = 0
elsif @history_pointer.zero?
return
else
Reline::HISTORY[@history_pointer] = @line
@history_pointer = 0
@line = Reline::HISTORY[@history_pointer]
@cursor_max = calculate_width(@line)
@cursor = 0
@byte_pointer = 0
end
end
private def vi_histedit(key)
path = Tempfile.open { |fp|
fp.write @line
fp.path
}
system("#{ENV['EDITOR']} #{path}")
@line = Pathname.new(path).read
finish
end
private def vi_paste_prev(key, arg: 1)
if @vi_clipboard.size > 0
@line = byteinsert(@line, @byte_pointer, @vi_clipboard)
@cursor_max += calculate_width(@vi_clipboard)
cursor_point = @vi_clipboard.grapheme_clusters[0..-2].join
@cursor += calculate_width(cursor_point)
@byte_pointer += cursor_point.bytesize
end
arg -= 1
vi_paste_prev(key, arg: arg) if arg > 0
end
private def vi_paste_next(key, arg: 1)
if @vi_clipboard.size > 0
byte_size = Reline::Unicode.get_next_mbchar_size(@line, @byte_pointer)
@line = byteinsert(@line, @byte_pointer + byte_size, @vi_clipboard)
@cursor_max += calculate_width(@vi_clipboard)
@cursor += calculate_width(@vi_clipboard)
@byte_pointer += @vi_clipboard.bytesize
end
arg -= 1
vi_paste_next(key, arg: arg) if arg > 0
end
private def ed_argument_digit(key)
if @vi_arg.nil?
unless key.chr.to_i.zero?
@vi_arg = key.chr.to_i
end
else
@vi_arg = @vi_arg * 10 + key.chr.to_i
end
end
private def vi_to_column(key, arg: 0)
@byte_pointer, @cursor = @line.grapheme_clusters.inject([0, 0]) { |total, gc|
# total has [byte_size, cursor]
mbchar_width = Reline::Unicode.get_mbchar_width(gc)
if (total.last + mbchar_width) >= arg
break total
elsif (total.last + mbchar_width) >= @cursor_max
break total
else
total = [total.first + gc.bytesize, total.last + mbchar_width]
total
end
}
end
private def vi_replace_char(key, arg: 1)
@waiting_proc = ->(key) {
if arg == 1
byte_size = Reline::Unicode.get_next_mbchar_size(@line, @byte_pointer)
before = @line.byteslice(0, @byte_pointer)
remaining_point = @byte_pointer + byte_size
after = @line.byteslice(remaining_point, @line.size - remaining_point)
@line = before + key.chr + after
@cursor_max = calculate_width(@line)
@waiting_proc = nil
elsif arg > 1
byte_size = 0
arg.times do
byte_size += Reline::Unicode.get_next_mbchar_size(@line, @byte_pointer + byte_size)
end
before = @line.byteslice(0, @byte_pointer)
remaining_point = @byte_pointer + byte_size
after = @line.byteslice(remaining_point, @line.size - remaining_point)
replaced = key.chr * arg
@line = before + replaced + after
@byte_pointer += replaced.bytesize
@cursor += calculate_width(replaced)
@cursor_max = calculate_width(@line)
@waiting_proc = nil
end
}
end
private def vi_next_char(key, arg: 1)
@waiting_proc = ->(key_for_proc) { search_next_char(key_for_proc, arg) }
end
private def search_next_char(key, arg)
if key.instance_of?(String)
inputed_char = key
else
inputed_char = key.chr
end
total = nil
found = false
@line.byteslice(@byte_pointer..-1).grapheme_clusters.each do |mbchar|
# total has [byte_size, cursor]
unless total
# skip cursor point
width = Reline::Unicode.get_mbchar_width(mbchar)
total = [mbchar.bytesize, width]
else
if inputed_char == mbchar
arg -= 1
if arg.zero?
found = true
break
end
end
width = Reline::Unicode.get_mbchar_width(mbchar)
total = [total.first + mbchar.bytesize, total.last + width]
end
end
if found and total
byte_size, width = total
@byte_pointer += byte_size
@cursor += width
end
@waiting_proc = nil
end
private def vi_join_lines(key, arg: 1)
if @is_multiline and @buffer_of_lines.size > @line_index + 1
@cursor = calculate_width(@line)
@byte_pointer = @line.bytesize
@line += ' ' + @buffer_of_lines.delete_at(@line_index + 1).gsub(/\A +/, '')
@cursor_max = calculate_width(@line)
@buffer_of_lines[@line_index] = @line
@rerender_all = true
@rest_height += 1
end
arg -= 1
vi_join_lines(key, arg: arg) if arg > 0
end
end