/
keying.rb
442 lines (403 loc) · 11.6 KB
/
keying.rb
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module Diakonos
module Keying
KEYSTRINGS = [
"ctrl+space", # 0
"ctrl+a", # 1
"ctrl+b", # 2
"ctrl+c", # 3
"ctrl+d", # 4
"ctrl+e", # 5
"ctrl+f", # 6
"ctrl+g", # 7
nil, # 8
"tab", # 9
"ctrl+j", # 10
"ctrl+k", # 11
"ctrl+l", # 12
"enter", # 13
"ctrl+n", # 14
"ctrl+o", # 15
"ctrl+p", # 16
"ctrl+q", # 17
"ctrl+r", # 18
"ctrl+s", # 19
"ctrl+t", # 20
"ctrl+u", # 21
"ctrl+v", # 22
"ctrl+w", # 23
"ctrl+x", # 24
"ctrl+y", # 25
"ctrl+z", # 26
"esc", # 27
nil, # 28
nil, # 29
nil, # 30
nil, # 31
"space", # 32
] + (33..126).map(&:chr) + [
"backspace" # 127
]
def self.keycodes_for( str )
retval = case str.downcase
when "down"
Curses::KEY_DOWN
when "up"
Curses::KEY_UP
when "left"
Curses::KEY_LEFT
when "right"
Curses::KEY_RIGHT
when "home"
Curses::KEY_HOME
when "end"
Curses::KEY_END
when "insert", "ins"
Curses::KEY_IC
when "delete", "del"
Curses::KEY_DC
when "backspace"
::Diakonos::BACKSPACE
when "tab"
9
when "pageup", "page-up"
Curses::KEY_PPAGE
when "pagedown", "page-down"
Curses::KEY_NPAGE
when "enter", "return"
::Diakonos::ENTER
when "numpad7", "keypad7", "kp-7"
Curses::KEY_A1
when "numpad9", "keypad9", "kp-9"
Curses::KEY_A3
when "numpad5", "keypad5", "kp-5"
Curses::KEY_B2
when "numpad1", "keypad1", "kp-1"
Curses::KEY_C1
when "numpad3", "keypad3", "kp-3"
Curses::KEY_C3
when "escape", "esc"
::Diakonos::ESCAPE
when "space"
32
when "ctrl+space"
0
when "find"
Curses::KEY_FIND
when "select"
Curses::KEY_SELECT
when "suspend"
Curses::KEY_SUSPEND
when /^f(\d\d?)$/
Curses::KEY_F0 + $1.to_i
when /^ctrl\+[a-gi-z]$/
str.downcase[ -1 ].ord - 96
when /^ctrl\+h$/
::Diakonos::CTRL_H
when /^alt\+(.)$/
[ ::Diakonos::ESCAPE, $1[ 0 ].ord ]
when /^ctrl\+alt\+(.)$/, /^alt\+ctrl\+(.)$/
[ ::Diakonos::ESCAPE, str.downcase[ -1 ].ord - 96 ]
when /^keycode(\d+)$/
$1.to_i
when /^.$/
str[ 0 ].ord
end
Array( retval )
end
def self.key_string_for( num )
retval = KEYSTRINGS[ num ]
if retval.nil?
retval = case num
when Curses::KEY_DOWN
"down"
when Curses::KEY_UP
"up"
when Curses::KEY_LEFT
"left"
when Curses::KEY_RIGHT
"right"
when Curses::KEY_HOME
"home"
when Curses::KEY_END
"end"
when Curses::KEY_IC
"insert"
when Curses::KEY_DC
"delete"
when Curses::KEY_PPAGE
"page-up"
when Curses::KEY_NPAGE
"page-down"
when Curses::KEY_A1
"numpad7"
when Curses::KEY_A3
"numpad9"
when Curses::KEY_B2
"numpad5"
when Curses::KEY_C1
"numpad1"
when Curses::KEY_C3
"numpad3"
when Curses::KEY_FIND
"find"
when Curses::KEY_SELECT
"select"
when Curses::KEY_SUSPEND
"suspend"
when Curses::KEY_F0..(Curses::KEY_F0 + 24)
"f" + ( num - Curses::KEY_F0 ).to_s
when CTRL_H
"ctrl+h"
when Curses::KEY_RESIZE
"resize"
when RESIZE2
"resize2"
end
end
if retval.nil? && num.class == Fixnum
retval = "keycode#{num}"
end
retval
end
UTF_8_2_BYTE_BEGIN = 0xc2
UTF_8_2_BYTE_END = 0xdf
UTF_8_3_BYTE_BEGIN = 0xe0
UTF_8_3_BYTE_END = 0xef
UTF_8_4_BYTE_BEGIN = 0xf0
UTF_8_4_BYTE_END = 0xf4
end
class Diakonos
def keychain_str_for( array )
chain_str = ""
array.each do |key|
key_str = Keying.key_string_for( key )
if key_str
chain_str << key_str + " "
else
chain_str << key.to_s + " "
end
end
chain_str.strip
end
def capture_keychain( c, context )
if c == ENTER
@capturing_keychain = false
buffer_current.delete_selection
str = keychain_str_for( context )
buffer_current.insert_string str
cursor_right( Buffer::STILL_TYPING, str.length )
else
keychain_pressed = context.concat [ c ]
function_and_args = @modes[ 'edit' ].keymap.get_leaf( keychain_pressed )
if function_and_args
function, args = function_and_args
end
partial_keychain = @modes[ 'edit' ].keymap.get_node( keychain_pressed )
if partial_keychain
set_iline( "Part of existing keychain: " + keychain_str_for( keychain_pressed ) + "..." )
else
set_iline keychain_str_for( keychain_pressed ) + "..."
end
process_keystroke keychain_pressed
end
end
def capture_mapping( c, context )
if c == ENTER
@capturing_mapping = false
buffer_current.delete_selection
set_iline
else
keychain_pressed = context.concat [ c ]
function_and_args = @modes[ 'edit' ].keymap.get_leaf( keychain_pressed )
if function_and_args
function, args = function_and_args
set_iline "#{keychain_str_for( keychain_pressed )} -> #{function}( #{args} )"
else
partial_keychain = @modes[ 'edit' ].keymap.get_node( keychain_pressed )
if partial_keychain
set_iline( "Several mappings start with: " + keychain_str_for( keychain_pressed ) + "..." )
process_keystroke keychain_pressed
else
set_iline "There is no mapping for " + keychain_str_for( keychain_pressed )
end
end
end
end
def typeable?( char )
char > 31 && char < 255 && char != BACKSPACE
end
# @param [Fixnum] c The first byte of a UTF-8 byte sequence
# @return [String] nil if c is not the beginning of a multi-byte sequence
def utf_8_bytes_to_char(c, mode)
if Keying::UTF_8_2_BYTE_BEGIN <= c && c <= Keying::UTF_8_2_BYTE_END
# 2-byte character
byte_array = [c, @modes[mode].window.getch.ord]
elsif Keying::UTF_8_3_BYTE_BEGIN <= c && c <= Keying::UTF_8_3_BYTE_END
# 3-byte character
byte_array = [
c,
@modes[mode].window.getch.ord,
@modes[mode].window.getch.ord,
]
elsif Keying::UTF_8_4_BYTE_BEGIN <= c && c <= Keying::UTF_8_4_BYTE_END
# 4-byte character
byte_array = [
c,
@modes[mode].window.getch.ord,
@modes[mode].window.getch.ord,
@modes[mode].window.getch.ord,
]
else
return nil
end
byte_array.pack('C*').force_encoding('utf-8')
end
# @param [Fixnum] c The ordinal (number) of a character
# @param [String] mode
# @return [Boolean] true iff c began a UTF-8 byte sequence
def handle_utf_8(c, mode)
utf_8_char = utf_8_bytes_to_char(c, mode)
if utf_8_char
self.type_character utf_8_char, mode
true
end
end
# Handle paste from a GUI (like x.org). i.e. Shift-Insert
def handle_gui_paste(mode)
s = ""
ch = nil
loop do
ch = nil
begin
Timeout::timeout(0.02) do
ch = @modes[mode].window.getch
end
rescue Timeout::Error => e
break
end
break if ch.nil?
c = ch.ord
utf_8_char = self.utf_8_bytes_to_char(c, mode)
if utf_8_char
s << utf_8_char
elsif self.typeable?(c)
s << c
elsif c == ENTER && mode == 'edit'
s << "\n"
else
break
end
end
if ! s.empty?
case mode
when 'edit'
buffer_current.paste s, Buffer::TYPING
when 'input'
@readline.paste s
end
end
if ch
process_keystroke( [], mode, ch )
end
end
# context is an array of characters (bytes) which are keystrokes previously
# typed (in a chain of keystrokes)
def process_keystroke( context = [], mode = 'edit', ch = nil )
ch ||= @modes[ mode ].window.getch
return if ch.nil?
if ch == Curses::KEY_MOUSE
handle_mouse_event
return
end
c = ch.ord
self.handle_utf_8(c, mode) and return
if @capturing_keychain
capture_keychain c, context
elsif @capturing_mapping
capture_mapping c, context
else
if context.empty? && typeable?( c )
self.type_character ch, mode
self.handle_gui_paste(mode)
return
end
keychain_pressed = context.concat [ c ]
function_and_args = (
@modes[mode].keymap_after[@function_last].get_leaf( keychain_pressed ) ||
@modes[mode].keymap.get_leaf( keychain_pressed )
)
if function_and_args
function, args = function_and_args
@function_last = function
if mode != 'input' && ! @settings[ "context.combined" ]
set_iline
end
if args
to_eval = "#{function}( #{args} )"
else
to_eval = function
end
if @macro_history
@macro_history.push to_eval
end
begin
if buffer_current.search_area? && ! ( /^(?:find|readline)/ === to_eval )
buffer_current.clear_search_area
end
eval to_eval, nil, "eval"
@functions_last << to_eval unless to_eval == "repeat_last"
if ! @there_was_non_movement
@there_was_non_movement = !( /^((cursor|page|scroll)_?(up|down|left|right)|find|seek)/i === to_eval )
end
rescue Exception => e
debug_log e.message
debug_log e.backtrace.join( "\n\t" )
show_exception e
end
else
partial_keychain = @modes[ mode ].keymap.get_node( keychain_pressed )
if partial_keychain
if mode != 'input'
set_iline( keychain_str_for( keychain_pressed ) + "..." )
end
process_keystroke keychain_pressed, mode
elsif mode != 'input'
set_iline "Nothing assigned to #{keychain_str_for( keychain_pressed )}"
end
end
end
end
def type_character( c, mode = 'edit' )
if @macro_history
@macro_history.push "type_character #{c.inspect}, #{mode.inspect}"
end
@there_was_non_movement = true
case mode
when 'edit'
buffer_current.delete_selection Buffer::DONT_DISPLAY
buffer_current.insert_string c
cursor_right Buffer::STILL_TYPING
if c =~ @indent_triggers[buffer_current.language]
buffer_current.parsed_indent cursor_eol: true
end
when 'input'
if ! @readline.numbered_list?
@readline.paste c
else
if(
showing_list? &&
( (48..57).include?( c.ord ) || (97..122).include?( c.ord ) )
)
line = list_buffer.to_a.select { |l|
l =~ /^#{c} /
}[ 0 ]
if line
@readline.list_sync line
@readline.finish
end
end
end
end
end
end
end