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|
use strict;
use File::Temp qw(tmpnam);
use POSIX qw(mkfifo);
use Irssi;
our $VERSION = '1.00';
our %IRSSI = {
authors => 'Teddy Wing',
contact => 'irssi@teddywing.com',
name => 'Vimput',
description => '',
license => 'GPL',
};
use constant CTRL_X => 24;
use constant ERROR_PREFIX => 'ERROR: ';
use constant OK_PREFIX => 'OK: ';
my $forked = 0;
# The location of the temporary file where prompt contents are written.
sub vimput_file {
Irssi::get_irssi_dir() . '/VIMPUT_MSG';
}
# Write the given string to our vimput_file.
sub write_input {
my ($message) = @_;
open my $handle, '>', vimput_file or die $!;
print $handle $message;
close $handle;
}
# Open a Tmux split containing a Vim instance editing the vimput_file.
sub open_tmux_split {
my ($fifo, $error_handle) = @_;
if (!$ENV{TMUX}) {
print $error_handle ERROR_PREFIX . 'Not running in tmux.';
return 0;
}
my $random_unused_filename = tmpnam();
my $command = "vim -c 'set buftype=acwrite' -c 'read ${\vimput_file}' -c '1 delete _' -c 'autocmd BufWriteCmd <buffer> :write $fifo | set nomodified' $random_unused_filename";
system('tmux', 'split-window', $command);
return 1;
}
# Forks a child process and opens a pipe for the child to communicate with
# the parent. In the child process, open a Tmux split, create a FIFO pipe,
# and send the contents of the FIFO to the parent.
sub open_tmux_and_update_input_line_when_finished {
return if $forked;
my ($read_handle, $write_handle);
pipe($read_handle, $write_handle);
sub cleanup {
close $read_handle;
close $write_handle;
}
my $pid = fork();
if (!defined $pid) {
Irssi::print("Failed to fork: $!", MSGLEVEL_CLIENTERROR);
cleanup();
return;
}
$forked = 1;
if (is_child_fork($pid)) {
my $fifo_path = tmpnam();
open_tmux_split($fifo_path, $write_handle) or do {
cleanup();
POSIX::_exit(1);
};
# The input line will be sent from Vim on this FIFO.
mkfifo($fifo_path, 0600) or do {
print $write_handle ERROR_PREFIX . "Failed to make FIFO: $!";
cleanup();
POSIX::_exit(1);
};
open my $fifo, '<', $fifo_path or do {
print $write_handle ERROR_PREFIX . "Failed to open FIFO: $!";
cleanup();
POSIX::_exit(1);
};
$fifo->autoflush(1);
while (<$fifo>) {
print $write_handle OK_PREFIX . $_;
}
close $fifo;
close $write_handle;
POSIX::_exit(0);
}
else {
close $write_handle;
Irssi::pidwait_add($pid);
my $pipe_tag;
my @args = ($read_handle, \$pipe_tag);
$pipe_tag = Irssi::input_add(
fileno $read_handle,
Irssi::INPUT_READ,
\&pipe_input,
\@args,
);
}
}
# Read messages in the parent process from the child over a pipe. Print error
# messages to the Irssi window. An OK message will be used to replace the
# current input line.
sub pipe_input {
my ($args) = @_;
my ($read_handle, $pipe_tag) = @$args;
my $input = <$read_handle>;
if (is_error_message($input)) {
$input = substr($input, length(ERROR_PREFIX));
Irssi::print($input, MSGLEVEL_CLIENTERROR);
}
elsif (is_ok_message($input)) {
$input = substr($input, length(OK_PREFIX));
chomp $input;
Irssi::gui_input_set($input);
}
$forked = 0;
close $read_handle;
Irssi::input_remove($$pipe_tag);
}
# Test whether `$pid` is a child process.
sub is_child_fork {
my ($pid) = @_;
return $pid == 0;
}
# Test whether `$string` starts with `ERROR_PREFIX`.
sub is_error_message {
my ($string) = @_;
return index($string, ERROR_PREFIX) == 0;
}
# Test whether `$string` starts with `OK_PREFIX`.
sub is_ok_message {
my ($string) = @_;
return index($string, OK_PREFIX) == 0;
}
Irssi::command_bind('help', sub {
if ($_[0] !~ /^vimput\s*$/) {
return;
}
my $help = <<HELP;
%9Details:%9
Opens the current input line in a new Tmux split in Vim. When the Vim
buffer is written, Irssi's prompt will be updated from the contents of the
buffer.
%9Note:%9 In order to use this script, you'll have to make a key binding to
Vimput. For example, to bind Ctrl-X:
/BIND ^X command script exec Irssi::Script::vimput::vimput
HELP
Irssi::print($help, MSGLEVEL_CLIENTCRAP);
Irssi::signal_stop();
});
sub vimput {
write_input(Irssi::parse_special('$L', undef, 0));
open_tmux_and_update_input_line_when_finished();
}
|
