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|
use strict;
use warnings;
use Irssi;
use Irssi::TextUI; # for sbar_items_redraw
# /statusbar window add vim_mode to get the status.
use vars qw($VERSION %IRSSI);
$VERSION = "1.0.1";
%IRSSI =
(
authors => "shabble",
contact => 'shabble+irssi@metavore.org, shabble@#irssi/Freenode',
name => "vim_mode",
description => "Give Irssi Vim-like commands for editing the inputline",
license => "Public Domain",
changed => "20/9/2010"
);
#sub DEBUG () { 1 }
sub DEBUG () { 0 }
# circular buffer to keep track of the last N keystrokes.
my @key_buf;
my $buf_idx = 0;
my $key_buf_timer;
my $key_buf_enabled = 0;
my $should_ignore = 0;
sub M_CMD() { 1 } # command mode
sub M_INS() { 0 } # insert mode
my $mode = M_INS;
my $commands
= {
'i' => { command => 'insert at cur',
func => \&cmd_insert,
params => {pos => sub { _input_pos() }},
},
'I' => { command => 'insert at end',
func => \&cmd_insert,
params => {pos => sub { _input_len() }},
},
'A' => { command => 'insert at start',
func => \&cmd_insert,
params => { pos => sub { 0 } },
},
'h' => { command => 'move left',
func => \&cmd_move,
params => { 'dir' => 'left' },
},
'l' => { command => 'move right',
func => \&cmd_move,
params => { 'dir' => 'right' },
},
'w' => { command => 'move forward word',
func => \&cmd_jump_word,
params => { 'dir' => 'fwd',
'pos' => sub { _input_pos() }
},
},
'b' => { command => 'move backward word',
func => \&cmd_jump_word,
params => { 'dir' => 'back',
'pos' => sub { _input_pos() }
},
},
'x' => { command => 'delete char forward',
func => \&cmd_delete_char,
params => { 'dir' => 'fwd',
'pos' => sub { _input_pos() }
},
},
};
sub cmd_delete_char {
my ($params) = @_;
my $pos = $params->{pos}->();
my $direction = $params->{dir};
print "Sending keystrokes for delete-char";
_stop();
my @buf = (4);
_emulate_keystrokes(@buf);
}
sub cmd_jump_word {
my ($params) = @_;
my $pos = $params->{pos}->();
my $direction = $params->{dir};
_stop();
my @buf;
if ($direction eq 'fwd') {
push @buf, (27, 102);
} else {
push @buf, (27, 98);
}
_emulate_keystrokes(@buf);
}
sub cmd_insert {
my ($params) = @_;
my $pos = $params->{pos}->();
_input_pos($pos);
$mode = M_INS;
_update_mode();
_stop();
}
sub cmd_move {
my ($params) = @_;
my $dir = $params->{dir};
my $current_pos = _input_pos();
_stop();
my @buf = (27, 91);
if ($dir eq 'left') {
push @buf, 68;
} else {
push @buf, 67;
}
_emulate_keystrokes(@buf);
}
sub vim_mode_cb {
my ($sb_item, $get_size_only) = @_;
my $mode_str = '';
if ($mode == M_INS) {
$mode_str = 'Insert';
} else {
$mode_str = '%_Command%_';
}
$sb_item->default_handler($get_size_only, "{sb $mode_str}", '', 0);
}
sub got_key {
my ($key) = @_;
return if ($should_ignore);
if ($key == 27) {
print "Esc seen, starting buffer";
$key_buf_enabled = 1;
# NOTE: this timeout might be too low on laggy systems, but
# it comes at the cost of keystroke latency for things that
# contain escape sequences (arrow keys, etc)
$key_buf_timer
= Irssi::timeout_add_once(10, \&handle_key_buffer, undef);
}
if ($key_buf_enabled) {
$key_buf[$buf_idx++] = $key;
_stop();
}
if ($mode == M_CMD) {
# command mode
handle_command($key);
}
}
sub handle_key_buffer {
Irssi::timeout_remove($key_buf_timer);
$key_buf_timer = undef;
# see what we've collected.
print "Key buffer contains: ", join(", ", @key_buf);
if (@key_buf == 1 && $key_buf[0] == 27) {
print "Command Mode";
$mode = M_CMD;
_update_mode();
} else {
# we need to identify what we got, and either replay it
# or pass it off to the command handler.
if ($mode == M_CMD) {
# command
my $key_str = join '', map { chr } @key_buf;
if ($key_str =~ m/^\e\[([ABCD])/) {
print "Arrow key: $1";
} else {
print "Dunno what that is."
}
} else {
_emulate_keystrokes(@key_buf);
}
}
@key_buf = ();
$buf_idx = 0;
$key_buf_enabled = 0;
}
sub handle_command {
my ($key) = @_;
my $char = chr($key);
if (exists $commands->{$char}) {
my $cmd = $commands->{$char};
# print "Going to execute command: ", $cmd->{command};
$cmd->{func}->( $cmd->{params} );
} else {
_stop(); # disable everything else
}
}
Irssi::signal_add_first 'gui key pressed' => \&got_key;
Irssi::statusbar_item_register ('vim_mode', 0, 'vim_mode_cb');
sub _input {
my ($data) = @_;
if (defined $data) {
Irssi::gui_input_set($data);
} else {
$data = Irssi::parse_special('$L', 0, 0)
}
return $data;
}
sub _input_len {
return length _input();
}
sub _input_pos {
my ($pos) = @_;
my $cur_pos = Irssi::gui_input_get_pos();
if (defined $pos) {
Irssi::gui_input_set_pos($pos) if $pos != $cur_pos;
} else {
$pos = $cur_pos;
}
return $pos;
}
sub _emulate_keystrokes {
my @keys = @_;
$should_ignore = 1;
for my $key (@keys) {
Irssi::signal_emit('gui key pressed', $key);
}
$should_ignore = 0;
}
sub _stop() {
Irssi::signal_stop();
}
sub _update_mode() {
Irssi::statusbar_items_redraw("vim_mode");
}
|
