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ima1zumi/line_editor.rb

Created December 6, 2020 12:57
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line_editor.rb
require 'reline/kill_ring'
require 'reline/unicode'
require 'tempfile'
class Reline::LineEditor
# TODO: undo
attr_reader :line
attr_reader :byte_pointer
attr_accessor :confirm_multiline_termination_proc
attr_accessor :completion_proc
attr_accessor :completion_append_character
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
MENU_WITH_PERFECT_MATCH = :menu_with_perfect_match
PERFECT_MATCH = :perfect_match
end
CompletionJourneyData = Struct.new('CompletionJourneyData', :preposing, :postposing, :list, :pointer)
MenuInfo = Struct.new('MenuInfo', :target, :list)
PROMPT_LIST_CACHE_TIMEOUT = 0.5
def initialize(config, encoding)
@config = config
@completion_append_character = ''
reset_variables(encoding: encoding)
end
def simplified_rendering?
if finished?
false
elsif @just_cursor_moving and not @rerender_all
true
else
not @rerender_all and not finished? and Reline::IOGate.in_pasting?
end
end
private def check_multiline_prompt(buffer, prompt)
if @vi_arg
prompt = "(arg: #{@vi_arg}) "
@rerender_all = true
elsif @searching_prompt
prompt = @searching_prompt
@rerender_all = true
else
prompt = @prompt
end
return [prompt, calculate_width(prompt, true), [prompt] * buffer.size] if simplified_rendering?
if @prompt_proc
if @cached_prompt_list and Time.now.to_f < (@prompt_cache_time + PROMPT_LIST_CACHE_TIMEOUT) and buffer.size == @cached_prompt_list.size
prompt_list = @cached_prompt_list
else
prompt_list = @cached_prompt_list = @prompt_proc.(buffer)
@prompt_cache_time = Time.now.to_f
end
prompt_list.map!{ prompt } if @vi_arg or @searching_prompt
if @config.show_mode_in_prompt
if @config.editing_mode_is?(:vi_command)
mode_icon = @config.vi_cmd_mode_icon
elsif @config.editing_mode_is?(:vi_insert)
mode_icon = @config.vi_ins_mode_icon
elsif @config.editing_mode_is?(:emacs)
mode_icon = @config.emacs_mode_string
else
mode_icon = '?'
end
prompt_list.map!{ |pr| mode_icon + pr }
end
prompt = prompt_list[@line_index]
prompt_width = calculate_width(prompt, true)
[prompt, prompt_width, prompt_list]
else
prompt_width = calculate_width(prompt, true)
if @config.show_mode_in_prompt
if @config.editing_mode_is?(:vi_command)
mode_icon = @config.vi_cmd_mode_icon
elsif @config.editing_mode_is?(:vi_insert)
mode_icon = @config.vi_ins_mode_icon
elsif @config.editing_mode_is?(:emacs)
mode_icon = @config.emacs_mode_string
else
mode_icon = '?'
end
prompt = mode_icon + prompt
end
[prompt, prompt_width, nil]
end
end
def reset(prompt = '', encoding:)
@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: encoding)
@old_trap = Signal.trap('SIGINT') {
@old_trap.call if @old_trap.respond_to?(:call) # can also be string, ex: "DEFAULT"
raise Interrupt
}
Reline::IOGate.set_winch_handler do
@rest_height = (Reline::IOGate.get_screen_size.first - 1) - Reline::IOGate.cursor_pos.y
old_screen_size = @screen_size
@screen_size = Reline::IOGate.get_screen_size
if old_screen_size.last < @screen_size.last # columns increase
@rerender_all = true
rerender
else
back = 0
new_buffer = whole_lines
prompt, prompt_width, prompt_list = check_multiline_prompt(new_buffer, prompt)
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
@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
calculate_height_by_lines(@buffer_of_lines[0..(@line_index - 1)], prompt_list || prompt)
end
if @prompt_proc
prompt = prompt_list[@line_index]
prompt_width = calculate_width(prompt, true)
end
calculate_nearest_cursor
@started_from = calculate_height_by_width(prompt_width + @cursor) - 1
Reline::IOGate.move_cursor_column((prompt_width + @cursor) % @screen_size.last)
@highest_in_this = calculate_height_by_width(prompt_width + @cursor_max)
@rerender_all = true
end
end
end
def finalize
Signal.trap('SIGINT', @old_trap)
end
def eof?
@eof
end
def reset_variables(prompt = '', encoding:)
@prompt = prompt
@mark_pointer = nil
@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
@waiting_operator_vi_arg = nil
@completion_journey_data = nil
@completion_state = CompletionState::NORMAL
@perfect_matched = nil
@menu_info = nil
@first_prompt = true
@searching_prompt = nil
@first_char = true
@add_newline_to_end_of_buffer = false
@just_cursor_moving = nil
@cached_prompt_list = nil
@prompt_cache_time = nil
@eof = false
@continuous_insertion_buffer = String.new(encoding: @encoding)
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 calculate_height_by_lines(lines, prompt)
result = 0
prompt_list = prompt.is_a?(Array) ? prompt : nil
lines.each_with_index { |line, i|
prompt = prompt_list[i] if prompt_list and prompt_list[i]
result += calculate_height_by_width(calculate_width(prompt, true) + calculate_width(line))
}
result
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
@just_cursor_moving = false
end
private def calculate_height_by_width(width)
width.div(@screen_size.last) + 1
end
private def split_by_width(str, max_width)
Reline::Unicode.split_by_width(str, max_width, @encoding)
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_all
@rerender_all = true
process_insert(force: true)
rerender
end
def rerender
return if @line.nil?
if @menu_info
scroll_down(@highest_in_all - @first_line_started_from)
@rerender_all = true
end
if @menu_info
show_menu
@menu_info = nil
end
prompt, prompt_width, prompt_list = check_multiline_prompt(whole_lines, prompt)
if @cleared
clear_screen_buffer(prompt, prompt_list, prompt_width)
@cleared = false
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 @add_newline_to_end_of_buffer
rerender_added_newline
@add_newline_to_end_of_buffer = false
elsif @just_cursor_moving and not @rerender_all
just_move_cursor
@just_cursor_moving = false
return
elsif @previous_line_index or new_highest_in_this != @highest_in_this
rerender_changed_current_line
@previous_line_index = nil
rendered = true
elsif @rerender_all
rerender_all_lines
@rerender_all = false
rendered = true
end
line = modify_lines(whole_lines)[@line_index]
if @is_multiline
prompt, prompt_width, prompt_list = check_multiline_prompt(whole_lines, prompt)
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 rerender_added_newline
scroll_down(1)
new_lines = whole_lines(index: @previous_line_index, line: @line)
prompt, prompt_width, = check_multiline_prompt(new_lines, prompt)
@buffer_of_lines[@previous_line_index] = @line
@line = @buffer_of_lines[@line_index]
render_partial(prompt, prompt_width, @line, false)
@cursor = @cursor_max = calculate_width(@line)
@byte_pointer = @line.bytesize
@highest_in_all += @highest_in_this
@highest_in_this = calculate_height_by_width(prompt_width + @cursor_max)
@first_line_started_from += @started_from + 1
@started_from = calculate_height_by_width(prompt_width + @cursor) - 1
@previous_line_index = nil
end
def just_move_cursor
prompt, prompt_width, prompt_list = check_multiline_prompt(@buffer_of_lines, prompt)
move_cursor_up(@started_from)
new_first_line_started_from =
if @line_index.zero?
0
else
calculate_height_by_lines(@buffer_of_lines[0..(@line_index - 1)], prompt_list || prompt)
end
@line = @buffer_of_lines[@line_index]
move_cursor_down(new_first_line_started_from - @first_line_started_from)
@first_line_started_from = new_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)
@previous_line_index = nil
end
private def rerender_changed_current_line
if @previous_line_index
new_lines = whole_lines(index: @previous_line_index, line: @line)
else
new_lines = whole_lines
end
prompt, prompt_width, prompt_list = check_multiline_prompt(new_lines, prompt)
all_height = calculate_height_by_lines(new_lines, prompt_list || prompt)
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 = render_whole_lines(new_lines, prompt_list || prompt, prompt_width)
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
calculate_height_by_lines(@buffer_of_lines[0..(@line_index - 1)], prompt_list || prompt)
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)
end
private def rerender_all_lines
move_cursor_up(@first_line_started_from + @started_from)
Reline::IOGate.move_cursor_column(0)
back = 0
new_buffer = whole_lines
prompt, prompt_width, prompt_list = check_multiline_prompt(new_buffer, prompt)
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
render_whole_lines(new_buffer, prompt_list || prompt, prompt_width)
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
calculate_height_by_lines(new_buffer[0..(@line_index - 1)], prompt_list || prompt)
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)
end
private def render_whole_lines(lines, prompt, prompt_width)
rendered_height = 0
modify_lines(lines).each_with_index do |line, index|
if prompt.is_a?(Array)
line_prompt = prompt[index]
prompt_width = calculate_width(line_prompt, true)
else
line_prompt = prompt
end
height = render_partial(line_prompt, prompt_width, line, false)
if index < (lines.size - 1)
scroll_down(1)
rendered_height += height
else
rendered_height += height - 1
end
end
rendered_height
end
private def render_partial(prompt, prompt_width, line_to_render, with_control = true)
visual_lines, height = split_by_width(line_to_render.nil? ? prompt : prompt + 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?
if calculate_width(visual_lines[index - 1], true) == Reline::IOGate.get_screen_size.last
# reaches the end of line
if Reline::IOGate.win?
# A newline is automatically inserted if a character is rendered at
# eol on command prompt.
else
# When the cursor is at the end of the line and erases characters
# after the cursor, some terminals delete the character at the
# cursor position.
move_cursor_down(1)
Reline::IOGate.move_cursor_column(0)
end
else
Reline::IOGate.erase_after_cursor
move_cursor_down(1)
Reline::IOGate.move_cursor_column(0)
end
next
end
@output.write line
if Reline::IOGate.win? and calculate_width(line, true) == Reline::IOGate.get_screen_size.last
# A newline is automatically inserted if a character is rendered at eol on command prompt.
@rest_height -= 1 if @rest_height > 0
end
@output.flush
if @first_prompt
@first_prompt = false
@pre_input_hook&.call
end
end
Reline::IOGate.erase_after_cursor
Reline::IOGate.move_cursor_column(0)
if with_control
# Just after rendring, so the cursor is on the last line.
if finished?
Reline::IOGate.move_cursor_column(0)
else
# Moves up from bottom of lines to the cursor position.
move_cursor_up(height - 1 - @started_from)
Reline::IOGate.move_cursor_column((prompt_width + @cursor) % @screen_size.last)
end
end
height
end
private def modify_lines(before)
return before if before.nil? || before.empty? || simplified_rendering?
if after = @output_modifier_proc&.call("#{before.join("\n")}\n", complete: finished?)
after.lines("\n").map { |l| l.chomp('') }
else
before
end
end
private def show_menu
scroll_down(@highest_in_all - @first_line_started_from)
@rerender_all = true
@menu_info.list.sort!.each do |item|
Reline::IOGate.move_cursor_column(0)
@output.write item
@output.flush
scroll_down(1)
end
scroll_down(@highest_in_all - 1)
move_cursor_up(@highest_in_all - 1 - @first_line_started_from)
end
private def clear_screen_buffer(prompt, prompt_list, prompt_width)
Reline::IOGate.clear_screen
back = 0
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)
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 not Encoding.compatible?(target.encoding, i.encoding)
raise Encoding::CompatibilityError, "#{target.encoding.name} is not compatible with #{i.encoding.name}"
end
if @config.completion_ignore_case
i&.downcase&.start_with?(target.downcase)
else
i&.start_with?(target)
end
}.uniq
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 @config.completion_ignore_case
if memo_mbchars[i].casecmp?(item_mbchars[i])
result << memo_mbchars[i]
else
break
end
else
if memo_mbchars[i] == item_mbchars[i]
result << memo_mbchars[i]
else
break
end
end
end
result
}
[target, preposing, completed, postposing]
end
private def complete(list, just_show_list = false)
case @completion_state
when CompletionState::NORMAL, CompletionState::JOURNEY
@completion_state = CompletionState::COMPLETION
when CompletionState::PERFECT_MATCH
@dig_perfect_match_proc&.(@perfect_matched)
end
if just_show_list
is_menu = true
elsif @completion_state == CompletionState::MENU
is_menu = true
elsif @completion_state == CompletionState::MENU_WITH_PERFECT_MATCH
is_menu = true
else
is_menu = false
end
result = complete_internal_proc(list, is_menu)
if @completion_state == CompletionState::MENU_WITH_PERFECT_MATCH
@completion_state = CompletionState::PERFECT_MATCH
end
return if result.nil?
target, preposing, completed, postposing = result
return if completed.nil?
if target <= completed and (@completion_state == CompletionState::COMPLETION)
if list.include?(completed)
if list.one?
@completion_state = CompletionState::PERFECT_MATCH
else
@completion_state = CompletionState::MENU_WITH_PERFECT_MATCH
end
@perfect_matched = completed
else
@completion_state = CompletionState::MENU
end
if not just_show_list and target < completed
@line = preposing + completed + completion_append_character.to_s + postposing
line_to_pointer = preposing + completed + completion_append_character.to_s
@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, CompletionState::MENU_WITH_PERFECT_MATCH
@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
@vi_arg = @waiting_operator_vi_arg if @waiting_operator_vi_arg > 1
block.(true)
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
current_waiting_operator_proc = @waiting_operator_proc
@waiting_proc = proc { |k|
old_cursor, old_byte_pointer = @cursor, @byte_pointer
old_waiting_proc.(k)
cursor_diff, byte_pointer_diff = @cursor - old_cursor, @byte_pointer - old_byte_pointer
@cursor, @byte_pointer = old_cursor, old_byte_pointer
current_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.(false)
end
@waiting_operator_proc = nil
@waiting_operator_vi_arg = nil
@vi_arg = nil
else
block.(false)
end
end
private def argumentable?(method_obj)
method_obj and method_obj.parameters.any? { |param| param[0] == :key and param[1] == :arg }
end
private def inclusive?(method_obj)
# If a motion method with the keyword argument "inclusive" follows the
# operator, it must contain the character at the cursor position.
method_obj and method_obj.parameters.any? { |param| param[0] == :key and param[1] == :inclusive }
end
def wrap_method_call(method_symbol, method_obj, key, with_operator = false)
if @config.editing_mode_is?(:emacs, :vi_insert) and @waiting_proc.nil? and @waiting_operator_proc.nil?
not_insertion = method_symbol != :ed_insert
process_insert(force: not_insertion)
end
if @vi_arg and argumentable?(method_obj)
if with_operator and inclusive?(method_obj)
method_obj.(key, arg: @vi_arg, inclusive: true)
else
method_obj.(key, arg: @vi_arg)
end
else
if with_operator and inclusive?(method_obj)
method_obj.(key, inclusive: true)
else
method_obj.(key)
end
end
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 |with_operator|
wrap_method_call(method_symbol, method_obj, key, with_operator)
end
else
wrap_method_call(method_symbol, method_obj, key) if method_obj
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 |with_operator|
wrap_method_call(method_symbol, method_obj, key, with_operator)
end
elsif @waiting_proc
@waiting_proc.(key)
elsif method_obj
wrap_method_call(method_symbol, method_obj, key)
else
ed_insert(key) unless @config.editing_mode_is?(:vi_command)
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
wrap_method_call(method_symbol, method_obj, key)
else
run_for_operators(key, method_symbol) do |with_operator|
wrap_method_call(method_symbol, method_obj, key, with_operator)
end
end
@kill_ring.process
else
ed_insert(key) unless @config.editing_mode_is?(:vi_command)
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)
@just_cursor_moving = nil
if 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
unless @config.disable_completion
result = call_completion_proc
if result.is_a?(Array)
completion_occurs = true
process_insert
complete(result)
end
end
elsif not @config.disable_completion and @config.editing_mode_is?(:vi_insert) and ["\C-p".ord, "\C-n".ord].include?(key.char)
unless @config.disable_completion
result = call_completion_proc
if result.is_a?(Array)
completion_occurs = true
process_insert
move_completed_list(result, "\C-p".ord == key.char ? :up : :down)
end
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 not Reline::IOGate.in_pasting? and @just_cursor_moving.nil?
if @previous_line_index and @buffer_of_lines[@previous_line_index] == @line
@just_cursor_moving = true
elsif @previous_line_index.nil? and @buffer_of_lines[@line_index] == @line
@just_cursor_moving = true
else
@just_cursor_moving = false
end
else
@just_cursor_moving = false
end
if @is_multiline and @auto_indent_proc and not simplified_rendering?
process_auto_indent
end
end
def call_completion_proc
result = retrieve_completion_block(true)
slice = result[1]
result = @completion_proc.(slice) if @completion_proc and slice
Reline.core.instance_variable_set(:@completion_quote_character, nil)
result
end
private def process_auto_indent
return if not @check_new_auto_indent and @previous_line_index # move cursor up or down
if @check_new_auto_indent and @previous_line_index and @previous_line_index > 0 and @line_index > @previous_line_index
# Fix indent of a line when a newline is inserted to the next
new_lines = whole_lines(index: @previous_line_index, line: @line)
new_indent = @auto_indent_proc.(new_lines[0..-3].push(''), @line_index - 1, 0, true)
md = @line.match(/\A */)
prev_indent = md[0].count(' ')
@line = ' ' * new_indent + @line.lstrip
new_indent = nil
result = @auto_indent_proc.(new_lines[0..-2], @line_index - 1, (new_lines[-2].size + 1), false)
if result
new_indent = result
end
if new_indent&.>= 0
@line = ' ' * new_indent + @line.lstrip
end
end
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&.>= 0
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].lstrip
@cursor = new_indent
@byte_pointer = new_indent
else
@line = ' ' * new_indent + @line.lstrip
@cursor += new_indent - prev_indent
@byte_pointer += new_indent - prev_indent
end
end
@check_new_auto_indent = false
end
def retrieve_completion_block(set_completion_quote_character = false)
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
closing_quote = nil
escaped_quote = nil
i = 0
while i < @byte_pointer do
slice = @line.byteslice(i, @byte_pointer - i)
unless slice.valid_encoding?
i += 1
next
end
if quote and slice.start_with?(closing_quote)
quote = nil
i += 1
rest = nil
elsif quote and slice.start_with?(escaped_quote)
# skip
i += 2
elsif slice =~ quote_characters_regexp # find new "
rest = $'
quote = $&
closing_quote = /(?!\\)#{Regexp.escape(quote)}/
escaped_quote = /\\#{Regexp.escape(quote)}/
i += 1
break_pointer = i - 1
elsif not quote and slice =~ word_break_regexp
rest = $'
i += 1
before = @line.byteslice(i, @byte_pointer - i)
break_pointer = i
else
i += 1
end
end
postposing = @line.byteslice(@byte_pointer, @line.bytesize - @byte_pointer)
if rest
preposing = @line.byteslice(0, break_pointer)
target = rest
if set_completion_quote_character and quote
Reline.core.instance_variable_set(:@completion_quote_character, quote)
if postposing !~ /(?!\\)#{Regexp.escape(quote)}/ # closing quote
insert_text(quote)
end
end
else
preposing = ''
if break_pointer
preposing = @line.byteslice(0, break_pointer)
else
preposing = ''
end
target = before
end
[preposing.encode(@encoding), target.encode(@encoding), postposing.encode(@encoding)]
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
@confirm_multiline_termination_proc.(temp_buffer.join("\n") + "\n")
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
@rerender_all = 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)
Reline::Unicode.calculate_width(str, allow_escape_code)
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
if (@buffer_of_lines.size - 1) == @line_index and @line.bytesize == @byte_pointer
@add_newline_to_end_of_buffer = true
end
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_unassigned(key) end # do nothing
private def process_insert(force: false)
return if @continuous_insertion_buffer.empty? or (Reline::IOGate.in_pasting? and not force)
width = Reline::Unicode.calculate_width(@continuous_insertion_buffer)
bytesize = @continuous_insertion_buffer.bytesize
if @cursor == @cursor_max
@line += @continuous_insertion_buffer
else
@line = byteinsert(@line, @byte_pointer, @continuous_insertion_buffer)
end
@byte_pointer += bytesize
@cursor += width
@cursor_max += width
@continuous_insertion_buffer.clear
end
private def ed_insert(key)
str = nil
width = nil
bytesize = nil
if key.instance_of?(String)
begin
key.encode(Encoding::UTF_8)
rescue Encoding::UndefinedConversionError
return
end
str = key
bytesize = key.bytesize
else
begin
key.chr.encode(Encoding::UTF_8)
rescue Encoding::UndefinedConversionError
return
end
str = key.chr
bytesize = 1
end
if Reline::IOGate.in_pasting?
@continuous_insertion_buffer << str
return
elsif not @continuous_insertion_buffer.empty?
process_insert
end
width = Reline::Unicode.get_mbchar_width(str)
if @cursor == @cursor_max
@line += str
else
@line = byteinsert(@line, @byte_pointer, str)
end
@byte_pointer += bytesize
@cursor += width
@cursor_max += width
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
alias_method :backward_char, :ed_prev_char
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 generate_searcher
Fiber.new do |first_key|
prev_search_key = first_key
search_word = String.new(encoding: @encoding)
multibyte_buf = String.new(encoding: 'ASCII-8BIT')
last_hit = nil
case first_key
when "\C-r".ord
prompt_name = 'reverse-i-search'
when "\C-s".ord
prompt_name = 'i-search'
end
loop do
key = Fiber.yield(search_word)
search_again = false
case key
when -1 # determined
Reline.last_incremental_search = search_word
break
when "\C-h".ord, "\C-?".ord
grapheme_clusters = search_word.grapheme_clusters
if grapheme_clusters.size > 0
grapheme_clusters.pop
search_word = grapheme_clusters.join
end
when "\C-r".ord, "\C-s".ord
search_again = true if prev_search_key == key
prev_search_key = key
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 not search_word.empty? and @line_backup_in_history&.include?(search_word)
@history_pointer = nil
hit = @line_backup_in_history
else
if search_again
if search_word.empty? and Reline.last_incremental_search
search_word = Reline.last_incremental_search
end
if @history_pointer
case prev_search_key
when "\C-r".ord
history_pointer_base = 0
history = Reline::HISTORY[0..(@history_pointer - 1)]
when "\C-s".ord
history_pointer_base = @history_pointer + 1
history = Reline::HISTORY[(@history_pointer + 1)..-1]
end
else
history_pointer_base = 0
history = Reline::HISTORY
end
elsif @history_pointer
case prev_search_key
when "\C-r".ord
history_pointer_base = 0
history = Reline::HISTORY[0..@history_pointer]
when "\C-s".ord
history_pointer_base = @history_pointer
history = Reline::HISTORY[@history_pointer..-1]
end
else
history_pointer_base = 0
history = Reline::HISTORY
end
case prev_search_key
when "\C-r".ord
hit_index = history.rindex { |item|
item.include?(search_word)
}
when "\C-s".ord
hit_index = history.index { |item|
item.include?(search_word)
}
end
if hit_index
@history_pointer = history_pointer_base + hit_index
hit = Reline::HISTORY[@history_pointer]
end
end
case prev_search_key
when "\C-r".ord
prompt_name = 'reverse-i-search'
when "\C-s".ord
prompt_name = 'i-search'
end
if hit
if @is_multiline
@buffer_of_lines = hit.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
@searching_prompt = "(%s)`%s'" % [prompt_name, search_word]
else
@line = hit
@searching_prompt = "(%s)`%s': %s" % [prompt_name, search_word, hit]
end
last_hit = hit
else
if @is_multiline
@rerender_all = true
@searching_prompt = "(failed %s)`%s'" % [prompt_name, search_word]
else
@searching_prompt = "(failed %s)`%s': %s" % [prompt_name, search_word, last_hit]
end
end
end
end
end
private def incremental_search_history(key)
unless @history_pointer
if @is_multiline
@line_backup_in_history = whole_buffer
else
@line_backup_in_history = @line
end
end
searcher = generate_searcher
searcher.resume(key)
@searching_prompt = "(reverse-i-search)`': "
@waiting_proc = ->(k) {
case k
when "\C-j".ord
if @history_pointer
buffer = Reline::HISTORY[@history_pointer]
else
buffer = @line_backup_in_history
end
if @is_multiline
@buffer_of_lines = buffer.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 = buffer
end
@searching_prompt = nil
@waiting_proc = nil
@cursor_max = calculate_width(@line)
@cursor = @byte_pointer = 0
searcher.resume(-1)
when "\C-g".ord
if @is_multiline
@buffer_of_lines = @line_backup_in_history.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 = @line_backup_in_history
end
@history_pointer = nil
@searching_prompt = nil
@waiting_proc = nil
@line_backup_in_history = nil
@cursor_max = calculate_width(@line)
@cursor = @byte_pointer = 0
@rerender_all = true
else
chr = k.is_a?(String) ? k : k.chr(Encoding::ASCII_8BIT)
if chr.match?(/[[:print:]]/) or k == "\C-h".ord or k == "\C-?".ord or k == "\C-r".ord or k == "\C-s".ord
searcher.resume(k)
else
if @history_pointer
line = Reline::HISTORY[@history_pointer]
else
line = @line_backup_in_history
end
if @is_multiline
@line_backup_in_history = whole_buffer
@buffer_of_lines = line.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 = line
end
@searching_prompt = nil
@waiting_proc = nil
@cursor_max = calculate_width(@line)
@cursor = @byte_pointer = 0
searcher.resume(-1)
end
end
}
end
private def vi_search_prev(key)
incremental_search_history(key)
end
alias_method :reverse_search_history, :vi_search_prev
private def vi_search_next(key)
incremental_search_history(key)
end
alias_method :forward_search_history, :vi_search_next
private def ed_search_prev_history(key, arg: 1)
history = nil
h_pointer = nil
line_no = nil
substr = @line.slice(0, @byte_pointer)
if @history_pointer.nil?
return if not @line.empty? and substr.empty?
history = Reline::HISTORY
elsif @history_pointer.zero?
history = nil
h_pointer = nil
else
history = Reline::HISTORY.slice(0, @history_pointer)
end
return if history.nil?
if @is_multiline
h_pointer = history.rindex { |h|
h.split("\n").each_with_index { |l, i|
if l.start_with?(substr)
line_no = i
break
end
}
not line_no.nil?
}
else
h_pointer = history.rindex { |l|
l.start_with?(substr)
}
end
return if h_pointer.nil?
@history_pointer = h_pointer
if @is_multiline
@buffer_of_lines = Reline::HISTORY[@history_pointer].split("\n")
@buffer_of_lines = [String.new(encoding: @encoding)] if @buffer_of_lines.empty?
@line_index = line_no
@line = @buffer_of_lines.last
@rerender_all = true
else
@line = Reline::HISTORY[@history_pointer]
end
@cursor_max = calculate_width(@line)
arg -= 1
ed_search_prev_history(key, arg: arg) if arg > 0
end
alias_method :history_search_backward, :ed_search_prev_history
private def ed_search_next_history(key, arg: 1)
substr = @line.slice(0, @byte_pointer)
if @history_pointer.nil?
return
elsif @history_pointer == (Reline::HISTORY.size - 1) and not substr.empty?
return
end
history = Reline::HISTORY.slice((@history_pointer + 1)..-1)
h_pointer = nil
line_no = nil
if @is_multiline
h_pointer = history.index { |h|
h.split("\n").each_with_index { |l, i|
if l.start_with?(substr)
line_no = i
break
end
}
not line_no.nil?
}
else
h_pointer = history.index { |l|
l.start_with?(substr)
}
end
h_pointer += @history_pointer + 1 if h_pointer and @history_pointer
return if h_pointer.nil? and not substr.empty?
@history_pointer = h_pointer
if @is_multiline
if @history_pointer.nil? and substr.empty?
@buffer_of_lines = []
@line_index = 0
else
@buffer_of_lines = Reline::HISTORY[@history_pointer].split("\n")
@line_index = line_no
end
@buffer_of_lines = [String.new(encoding: @encoding)] if @buffer_of_lines.empty?
@line = @buffer_of_lines.last
@rerender_all = true
else
if @history_pointer.nil? and substr.empty?
@line = ''
else
@line = Reline::HISTORY[@history_pointer]
end
end
@cursor_max = calculate_width(@line)
arg -= 1
ed_search_next_history(key, arg: arg) if arg > 0
end
alias_method :history_search_forward, :ed_search_next_history
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, :vi_insert)
@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, :vi_insert)
@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)
process_insert(force: true)
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)
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
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(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
private def em_delete_or_list(key)
if @line.empty? or @byte_pointer < @line.bytesize
em_delete(key)
else # show completed list
result = call_completion_proc
if result.is_a?(Array)
complete(result, true)
end
end
end
alias_method :delete_char_or_list, :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 :vi_movement_mode, :vi_command_mode
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, inclusive: false)
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
if inclusive and arg.zero?
byte_size = Reline::Unicode.get_next_mbchar_size(@line, @byte_pointer)
if byte_size > 0
c = @line.byteslice(@byte_pointer, byte_size)
width = Reline::Unicode.get_mbchar_width(c)
@byte_pointer += byte_size
@cursor += width
end
end
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, inclusive: false)
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
if inclusive and arg.zero?
byte_size = Reline::Unicode.get_next_mbchar_size(@line, @byte_pointer)
if byte_size > 0
c = @line.byteslice(@byte_pointer, byte_size)
width = Reline::Unicode.get_mbchar_width(c)
@byte_pointer += byte_size
@cursor += width
end
end
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 vi_insert_at_bol(key)
ed_move_to_beg(key)
@config.editing_mode = :vi_insert
end
private def vi_add_at_eol(key)
ed_move_to_end(key)
@config.editing_mode = :vi_insert
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, arg: 1)
@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
@config.editing_mode = :vi_insert
}
@waiting_operator_vi_arg = arg
end
private def vi_delete_meta(key, arg: 1)
@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
}
@waiting_operator_vi_arg = arg
end
private def vi_yank(key, arg: 1)
@waiting_operator_proc = proc { |cursor_diff, byte_pointer_diff|
if byte_pointer_diff > 0
cut = @line.byteslice(@byte_pointer, byte_pointer_diff)
elsif byte_pointer_diff < 0
cut = @line.byteslice(@byte_pointer + byte_pointer_diff, -byte_pointer_diff)
end
copy_for_vi(cut)
}
@waiting_operator_vi_arg = arg
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
ed_newline(key)
end
end
alias_method :vi_end_of_transmission, :vi_list_or_eof
alias_method :vi_eof_maybe, :vi_list_or_eof
private def ed_delete_next_char(key, arg: 1)
byte_size = Reline::Unicode.get_next_mbchar_size(@line, @byte_pointer)
unless @line.empty? || byte_size == 0
@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 = File.read(path)
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 = ->(k) {
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 + k.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 = k.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, inclusive: false)
@waiting_proc = ->(key_for_proc) { search_next_char(key_for_proc, arg, inclusive: inclusive) }
end
private def vi_to_next_char(key, arg: 1, inclusive: false)
@waiting_proc = ->(key_for_proc) { search_next_char(key_for_proc, arg, need_prev_char: true, inclusive: inclusive) }
end
private def search_next_char(key, arg, need_prev_char: false, inclusive: false)
if key.instance_of?(String)
inputed_char = key
else
inputed_char = key.chr
end
prev_total = nil
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)
prev_total = total
total = [total.first + mbchar.bytesize, total.last + width]
end
end
if not need_prev_char and found and total
byte_size, width = total
@byte_pointer += byte_size
@cursor += width
elsif need_prev_char and found and prev_total
byte_size, width = prev_total
@byte_pointer += byte_size
@cursor += width
end
if inclusive
byte_size = Reline::Unicode.get_next_mbchar_size(@line, @byte_pointer)
if byte_size > 0
c = @line.byteslice(@byte_pointer, byte_size)
width = Reline::Unicode.get_mbchar_width(c)
@byte_pointer += byte_size
@cursor += width
end
end
@waiting_proc = nil
end
private def vi_prev_char(key, arg: 1)
@waiting_proc = ->(key_for_proc) { search_prev_char(key_for_proc, arg) }
end
private def vi_to_prev_char(key, arg: 1)
@waiting_proc = ->(key_for_proc) { search_prev_char(key_for_proc, arg, true) }
end
private def search_prev_char(key, arg, need_next_char = false)
if key.instance_of?(String)
inputed_char = key
else
inputed_char = key.chr
end
prev_total = nil
total = nil
found = false
@line.byteslice(0..@byte_pointer).grapheme_clusters.reverse_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)
prev_total = total
total = [total.first + mbchar.bytesize, total.last + width]
end
end
if not need_next_char and found and total
byte_size, width = total
@byte_pointer -= byte_size
@cursor -= width
elsif need_next_char and found and prev_total
byte_size, width = prev_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).lstrip
@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
private def em_set_mark(key)
@mark_pointer = [@byte_pointer, @line_index]
end
alias_method :set_mark, :em_set_mark
private def em_exchange_mark(key)
return unless @mark_pointer
new_pointer = [@byte_pointer, @line_index]
@previous_line_index = @line_index
@byte_pointer, @line_index = @mark_pointer
@cursor = calculate_width(@line.byteslice(0, @byte_pointer))
@cursor_max = calculate_width(@line)
@mark_pointer = new_pointer
end
alias_method :exchange_point_and_mark, :em_exchange_mark
end
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