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# frozen_string_literal: true
module Textbringer
class Keymap
include Enumerable
def initialize
@map = {}
end
def define_key(key, command)
key_sequence = kbd(key)
case key_sequence.size
when 0
raise ArgumentError, "Empty key"
when 1
@map[key_sequence.first] = command
else
k, *ks = key_sequence
(@map[k] ||= Keymap.new).define_key(ks, command)
end
end
alias [] define_key
def lookup(key_sequence)
case key_sequence.size
when 0
raise ArgumentError, "Empty key"
when 1
@map[key_sequence.first]
else
k, *ks = key_sequence
km = @map[k]
if km.is_a?(Keymap)
km.lookup(ks)
else
nil
end
end
end
def each(prefixes = [], &block)
@map.each do |key, val|
if val.is_a?(Keymap)
val.each([*prefixes, key], &block)
else
yield([*prefixes, key], val)
end
end
end
def handle_undefined_key
@map.default_proc = Proc.new { |h, k| yield(k) }
end
def self.key_name(key)
case key
when Symbol
"<#{key}>"
when " "
"SPC"
when "\t"
"TAB"
when "\e"
"ESC"
when "\C-m"
"RET"
when /\A[\0-\x1f\x7f]\z/
"C-" + (key.ord ^ 0x40).chr.downcase
else
key.to_s
end
end
def self.key_sequence_string(key_sequence)
key_sequence.map { |key| key_name(key) }.join(" ")
end
private
def kbd(key)
case key
when Symbol
[key]
when String
key.chars
when Array
key
else
raise TypeError, "invalid key type #{key.class}"
end
end
end
GLOBAL_MAP = Keymap.new
GLOBAL_MAP.define_key(:resize, :resize_window)
GLOBAL_MAP.define_key(:right, :forward_char)
GLOBAL_MAP.define_key(?\C-f, :forward_char)
GLOBAL_MAP.define_key(:left, :backward_char)
GLOBAL_MAP.define_key(?\C-b, :backward_char)
GLOBAL_MAP.define_key("\ef", :forward_word)
GLOBAL_MAP.define_key("\eb", :backward_word)
GLOBAL_MAP.define_key("\egc", :goto_char)
GLOBAL_MAP.define_key("\egg", :goto_line)
GLOBAL_MAP.define_key("\eg\eg", :goto_line)
GLOBAL_MAP.define_key(:down, :next_line)
GLOBAL_MAP.define_key(?\C-n, :next_line)
GLOBAL_MAP.define_key(:up, :previous_line)
GLOBAL_MAP.define_key(?\C-p, :previous_line)
GLOBAL_MAP.define_key(:dc, :delete_char)
GLOBAL_MAP.define_key(?\C-d, :delete_char)
GLOBAL_MAP.define_key(:backspace, :backward_delete_char)
GLOBAL_MAP.define_key(?\C-h, :backward_delete_char)
GLOBAL_MAP.define_key(?\C-?, :backward_delete_char)
GLOBAL_MAP.define_key(?\C-a, :beginning_of_line)
GLOBAL_MAP.define_key(:home, :beginning_of_line)
GLOBAL_MAP.define_key(?\C-e, :end_of_line)
GLOBAL_MAP.define_key(:end, :end_of_line)
GLOBAL_MAP.define_key("\e<", :beginning_of_buffer)
GLOBAL_MAP.define_key("\e>", :end_of_buffer)
(?\x20..?\x7e).each do |c|
GLOBAL_MAP.define_key(c, :self_insert)
end
GLOBAL_MAP.define_key(?\t, :self_insert)
GLOBAL_MAP.define_key(?\C-q, :quoted_insert)
GLOBAL_MAP.define_key("\C-@", :set_mark_command)
GLOBAL_MAP.define_key("\C-x\C-@", :pop_global_mark)
GLOBAL_MAP.define_key("\e*", :next_global_mark)
GLOBAL_MAP.define_key("\e?", :previous_global_mark)
GLOBAL_MAP.define_key("\C-x\C-x", :exchange_point_and_mark)
GLOBAL_MAP.define_key("\ew", :copy_region)
GLOBAL_MAP.define_key(?\C-w, :kill_region)
GLOBAL_MAP.define_key(?\C-k, :kill_line)
GLOBAL_MAP.define_key("\ed", :kill_word)
GLOBAL_MAP.define_key(?\C-y, :yank)
GLOBAL_MAP.define_key("\ey", :yank_pop)
GLOBAL_MAP.define_key(?\C-_, :undo)
GLOBAL_MAP.define_key("\C-x\C-_", :redo_command)
GLOBAL_MAP.define_key("\C-t", :transpose_chars)
GLOBAL_MAP.define_key("\C-j", :newline)
GLOBAL_MAP.define_key("\C-m", :newline)
GLOBAL_MAP.define_key("\C-o", :open_line)
GLOBAL_MAP.define_key("\em", :back_to_indentation)
GLOBAL_MAP.define_key("\e^", :delete_indentation)
GLOBAL_MAP.define_key("\C-l", :recenter)
GLOBAL_MAP.define_key("\C-v", :scroll_up)
GLOBAL_MAP.define_key(:npage, :scroll_up)
GLOBAL_MAP.define_key("\ev", :scroll_down)
GLOBAL_MAP.define_key(:ppage, :scroll_down)
GLOBAL_MAP.define_key("\C-x0", :delete_window)
GLOBAL_MAP.define_key("\C-x1", :delete_other_windows)
GLOBAL_MAP.define_key("\C-x2", :split_window)
GLOBAL_MAP.define_key("\C-xo", :other_window)
GLOBAL_MAP.define_key("\C-x^", :enlarge_window)
GLOBAL_MAP.define_key("\C-x-", :shrink_window_if_larger_than_buffer)
GLOBAL_MAP.define_key("\C-x\C-c", :exit_textbringer)
GLOBAL_MAP.define_key("\C-z", :suspend_textbringer)
GLOBAL_MAP.define_key("\C-x\C-f", :find_file)
GLOBAL_MAP.define_key("\C-xb", :switch_to_buffer)
GLOBAL_MAP.define_key("\C-x\C-b", :list_buffers)
GLOBAL_MAP.define_key("\C-x\C-s", :save_buffer)
GLOBAL_MAP.define_key("\C-x\C-w", :write_file)
GLOBAL_MAP.define_key("\C-xk", :kill_buffer)
GLOBAL_MAP.define_key("\C-x\C-mf", :set_buffer_file_encoding)
GLOBAL_MAP.define_key("\C-x\C-mn", :set_buffer_file_format)
GLOBAL_MAP.define_key("\C-x\C-mr", :revert_buffer_with_encoding)
GLOBAL_MAP.define_key("\e.", :find_tag)
GLOBAL_MAP.define_key("\ex", :execute_command)
GLOBAL_MAP.define_key("\e:", :eval_expression)
GLOBAL_MAP.define_key(?\C-u, :universal_argument)
GLOBAL_MAP.define_key(?\C-g, :keyboard_quit)
GLOBAL_MAP.define_key(?\C-s, :isearch_forward)
GLOBAL_MAP.define_key(?\C-r, :isearch_backward)
GLOBAL_MAP.define_key("\e%", :query_replace_regexp)
GLOBAL_MAP.define_key("\e!", :shell_execute)
GLOBAL_MAP.define_key("\C-xr ", :point_to_register)
GLOBAL_MAP.define_key("\C-xrj", :jump_to_register)
GLOBAL_MAP.define_key("\C-xrx", :copy_to_register)
GLOBAL_MAP.define_key("\C-xrs", :copy_to_register)
GLOBAL_MAP.define_key("\C-xrg", :insert_register)
GLOBAL_MAP.define_key("\C-xri", :insert_register)
GLOBAL_MAP.define_key("\C-xrn", :number_to_register)
GLOBAL_MAP.define_key("\C-xr+", :increment_register)
GLOBAL_MAP.define_key("\C-x(", :start_keyboard_macro)
GLOBAL_MAP.define_key(:f3, :start_keyboard_macro)
GLOBAL_MAP.define_key("\C-x)", :end_keyboard_macro)
GLOBAL_MAP.define_key("\C-xe", :end_and_call_keyboard_macro)
GLOBAL_MAP.define_key(:f4, :end_or_call_keyboard_macro)
GLOBAL_MAP.define_key("\eq", :fill_paragraph)
GLOBAL_MAP.define_key([:f1, "b"], :describe_bindings)
GLOBAL_MAP.define_key([:f1, "f"], :describe_command)
GLOBAL_MAP.define_key([:f1, "k"], :describe_key)
GLOBAL_MAP.handle_undefined_key do |key|
if key.is_a?(String) && /[\0-\x7f]/ !~ key
:self_insert
else
nil
end
end
MINIBUFFER_LOCAL_MAP = Keymap.new
MINIBUFFER_LOCAL_MAP.define_key("\C-j", :exit_recursive_edit)
MINIBUFFER_LOCAL_MAP.define_key("\C-m", :exit_recursive_edit)
MINIBUFFER_LOCAL_MAP.define_key(?\t, :complete_minibuffer)
MINIBUFFER_LOCAL_MAP.define_key(?\C-g, :abort_recursive_edit)
end