512 lines
13 KiB
Perl
512 lines
13 KiB
Perl
use strict;
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use warnings;
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use Xchat ();
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use File::Spec ();
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use File::Basename qw(fileparse);
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# if the last time you addressed someone was greater than this many minutes
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# ago, ignore it
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# this avoids having people you have talked to a long time ago coming up too
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# early in the completion list
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# Setting this to 0 will disable the check which is effectively the same as
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# setting it to infinity
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my $last_use_threshold = 10; # 10 minutes
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# added to the front of a completion the same way as a suffix, only if
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# the word is at the beginning of the line
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my $prefix = '';
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# ignore leading non-alphanumeric characters: -[\]^_`{|}
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# Assuming you have the following nicks in a channel:
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# [SomeNick] _SomeNick_ `SomeNick SomeNick SomeOtherNick
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# when $ignore_leading_non_alnum is set to 0
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# s<tab> will cycle through SomeNick and SomeOtherNick
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# when $ignore_leading_non_alnum is set to 1
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# s<tab> will cycle through [SomeNick] _SomeNick_ `SomeNick SomeNick
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# SomeOtherNick
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my $ignore_leading_non_alnum = 0;
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# enable path completion
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my $path_completion = 1;
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my $base_path = '';
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# ignore the completion_amount setting and always cycle through nicks with tab
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my $always_cycle = 0;
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Xchat::register(
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"Tab Completion", "1.0500", "Alternative tab completion behavior"
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);
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Xchat::hook_print( "Key Press", \&complete );
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Xchat::hook_print( "Close Context", \&close_context );
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Xchat::hook_print( "Focus Tab", \&focus_tab );
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Xchat::hook_print( "Part", \&clean_selected );
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Xchat::hook_print( "Part with Reason", \&clean_selected );
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Xchat::hook_command( "", \&track_selected );
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sub SHIFT() { 1 }
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sub CTRL() { 4 }
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sub ALT() { 8 }
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sub TAB() { 0xFF09 }
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sub LEFT_TAB() { 0xFE20 }
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my %completions;
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my %last_visit;
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my %selected;
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my %escape_map = (
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'[' => qr![\[{]!,
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'{' => qr![\[{]!,
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'}' => qr![\]}]!,
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']' => qr![\]}]!,
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'\\' => qr![\\\|]!,
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'|' => qr![\\\|]!,
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'.' => qr!\.!,
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'^' => qr!\^!,
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'$' => qr!\$!,
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'*' => qr!\*!,
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'+' => qr!\+!,
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'?' => qr!\?!,
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'(' => qr!\(!,
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')' => qr!\)!,
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'-' => qr!\-!,
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);
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my $escapes = join "", keys %escape_map;
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$escapes = qr/[\Q$escapes\E]/;
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# used to determine if a word is the start of a path
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my $path_pattern = qr{^(?:~|/|[[:alpha:]]:\\)};
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sub complete {
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my ($key, $modifiers) = @{$_[0]};
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# if $_[0][0] contains the value of the key pressed
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# $_[0][1] contains modifiers
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# the value for tab is 0xFF09
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# the value for shift-tab(Left Tab) is 0xFE20
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# we don't care about other keys
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# the key must be a tab and left tab
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return Xchat::EAT_NONE unless $key == TAB || $key == LEFT_TAB;
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# if it is a tab then it must not have any modifiers
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return Xchat::EAT_NONE if $key == TAB && $modifiers & (CTRL|ALT|SHIFT);
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# loop backwards for shift+tab/left tab
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my $delta = $modifiers & SHIFT ? -1 : 1;
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my $context = Xchat::get_context;
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$completions{$context} ||= {};
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my $completions = $completions{$context};
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$completions->{pos} ||= -1;
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my $suffix = Xchat::get_prefs( "completion_suffix" );
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$suffix =~ s/^\s+//;
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my $input = Xchat::get_info( "inputbox" );
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my $cursor_pos = Xchat::get_info( "state_cursor" );
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my $left = substr( $input, 0, $cursor_pos );
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my $right = substr( $input, $cursor_pos );
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my $length = length $left;
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# trim spaces from the end of $left to avoid grabbing the wrong word
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# this is mainly needed for completion at the very beginning where a space
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# is added after the completion
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$left =~ s/\s+$//;
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# always add one to the index because
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# 1) if a space is found we want the position after it
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# 2) if a space isn't found then we get back -1
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my $word_start = rindex( $left, " " ) + 1;
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my $word = substr( $left, $word_start );
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$left = substr( $left, 0, -length $word );
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if( $cursor_pos == $completions->{pos} ) {
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my $previous_word = $completions->{completed};
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my $new_left = $input;
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substr( $new_left, $cursor_pos ) = "";
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if( $previous_word and $new_left =~ s/(\Q$previous_word\E)$// ) {
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$word = $1;
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$word_start = length( $new_left );
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$left = $new_left;
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}
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}
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my $command_char = Xchat::get_prefs( "input_command_char" );
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# ignore commands
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if( ($word !~ m{^[${command_char}]})
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or ( $word =~ m{^[${command_char}]} and $word_start != 0 ) ) {
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if( $cursor_pos == length $input # end of input box
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# not a valid nick char
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&& $input =~ /(?<![\x41-\x5A\x61-\x7A\x30-\x39\x5B-\x60\x7B-\x7D-])$/
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&& $cursor_pos != $completions->{pos} # not continuing a completion
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&& $word !~ m{^(?:[&#/~]|[[:alpha:]]:\\)} # not a channel or path
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) {
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# check for path completion
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unless( $path_completion and $word =~ $path_pattern ) {
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$word_start = $cursor_pos;
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$left = $input;
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$length = length $length;
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$right = "";
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$word = "";
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}
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}
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if( $word_start == 0 && $prefix && $word =~ /^\Q$prefix/ ) {
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$word =~ s/^\Q$prefix//;
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}
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my $completed; # this is going to be the "completed" word
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# for parital completions and channel names so a : isn't added
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#$completions->{skip_suffix} = ($word =~ /^[&#]/) ? 1 : 0;
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# continuing from a previous completion
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if(
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exists $completions->{matches} && @{$completions->{matches}}
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&& $cursor_pos == $completions->{pos}
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&& $word =~ /^\Q$completions->{matches}[$completions->{index}]/
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) {
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$completions->{index} += $delta;
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if( $completions->{index} < 0 ) {
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$completions->{index} += @{$completions->{matches}};
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} else {
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$completions->{index} %= @{$completions->{matches}};
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}
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} else {
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if( $word =~ /^[&#]/ ) {
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# channel name completion
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$completions->{matches} = [ matching_channels( $word ) ];
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$completions->{skip_suffix} = 0;
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} elsif( $path_completion and $word =~ $path_pattern ) {
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# file name completion
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$completions->{matches} = [ matching_files( $word ) ];
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$completions->{skip_suffix} = 1;
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} else {
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# nick completion
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# fix $word so { equals [, ] equals }, \ equals |
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# and escape regex metacharacters
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$word =~ s/($escapes)/$escape_map{$1}/g;
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$completions->{matches} = [ matching_nicks( $word ) ];
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$completions->{skip_suffix} = 0;
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}
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$completions->{index} = 0;
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}
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$completed = $completions->{matches}[ $completions->{index} ];
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$completions->{completed} = $completed;
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my $completion_amount = Xchat::get_prefs( "completion_amount" );
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# don't cycle if the number of possible completions is greater than
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# completion_amount
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if(
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!$always_cycle && (
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@{$completions->{matches}} > $completion_amount
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&& @{$completions->{matches}} != 1 )
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) {
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# don't print if we tabbed in the beginning and the list of possible
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# completions includes all nicks in the channel
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my $context_type = Xchat::context_info->{type};
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if( $context_type != 2 # not a channel
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or @{$completions->{matches}} < Xchat::get_list("users")
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) {
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Xchat::print( join " ", @{$completions->{matches}}, "\n" );
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}
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$completed = lcs( $completions->{matches} );
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$completions->{skip_suffix} = 1;
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}
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if( $completed ) {
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if( $word_start == 0 && !$completions->{skip_suffix} ) {
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# at the start of the line append completion suffix
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Xchat::command( "settext $prefix$completed$suffix$right");
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$completions->{pos} = length( "$prefix$completed$suffix" );
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} else {
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Xchat::command( "settext $left$completed$right" );
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$completions->{pos} = length( "$left$completed" );
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}
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Xchat::command( "setcursor $completions->{pos}" );
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}
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=begin
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# debugging stuff
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local $, = " ";
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my $input_length = length $input;
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Xchat::print [
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qq{input[$input]},
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qq{input_length[$input_length]},
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qq{cursor[$cursor_pos]},
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qq{start[$word_start]},
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qq{length[$length]},
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qq{left[$left]},
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qq{word[$word]}, qq{right[$right]},
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qq{completed[}. ($completed||""). qq{]},
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qq{pos[$completions->{pos}]},
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];
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use Data::Dumper;
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local $Data::Dumper::Indent = 0;
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Xchat::print Dumper $completions->{matches};
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=cut
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return Xchat::EAT_ALL;
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} else {
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return Xchat::EAT_NONE;
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}
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}
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# all channels starting with $word
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sub matching_channels {
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my $word = shift;
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# for use in compare_channels();
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our $current_chan;
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local $current_chan = Xchat::get_info( "channel" );
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my $conn_id = Xchat::get_info( "id" );
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$word =~ s/^[&#]+//;
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return
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map { $_->[1]->{channel} }
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sort compare_channels map {
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my $chan = $_->{channel};
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$chan =~ s/^[#&]+//;
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# comparisons will be done based only on the name
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# matching name, same connection, only channels
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$chan =~ /^$word/i && $_->{id} == $conn_id ?
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[ $chan, $_ ] :
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()
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} channels();
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}
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sub channels {
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return grep { $_->{type} == 2 } Xchat::get_list( "channels" );
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}
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sub compare_channels {
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# package variable, value set in matching_channels()
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our $current_chan;
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# turn off warnings generated from channels that have not yet been visited
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# since the script was loaded
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no warnings "uninitialized";
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# the current channel is always first, then ordered by most recently visited
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return
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$a->[1]{channel} eq $current_chan ? -1 :
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$b->[1]{channel} eq $current_chan ? 1 :
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$last_visit{ $b->[1]{context} } <=> $last_visit{ $a->[1]{context} }
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|| $a->[1]{channel} cmp $b->[1]{channel};
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}
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sub matching_nicks {
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my $word_re = shift;
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# for use in compare_nicks()
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our ($my_nick, $selections, $now);
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local $my_nick = Xchat::get_info( "nick" );
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local $selections = $selected{ Xchat::get_context() };
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local $now = time;
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my $pattern = $ignore_leading_non_alnum ?
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qr/^[\-\[\]^_`{|}\\]*$word_re/i : qr/^$word_re/i;
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return
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map { $_->{nick} }
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sort compare_nicks grep {
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$_->{nick} =~ $pattern;
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} Xchat::get_list( "users" )
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}
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sub max {
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return unless @_;
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my $max = shift;
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for(@_) {
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$max = $_ if $_ > $max;
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}
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return $max;
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}
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sub compare_times {
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# package variables set in matching_nicks()
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our $selections;
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our $now;
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for my $nick ( $a->{nick}, $b->{nick} ) {
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# turn off the warnings that get generated from users who have yet
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# to speak since the script was loaded
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no warnings "uninitialized";
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if( $last_use_threshold
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&& (( $now - $selections->{$nick}) > ($last_use_threshold * 60)) ) {
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delete $selections->{ $nick }
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}
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}
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my $a_time = $selections->{ $a->{nick} } || 0 ;
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my $b_time = $selections->{ $b->{nick} } || 0 ;
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if( $a_time || $b_time ) {
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return $b_time <=> $a_time;
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} elsif( !$a_time && !$b_time ) {
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return $b->{lasttalk} <=> $a->{lasttalk};
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}
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}
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sub compare_nicks {
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# more package variables, value set in matching_nicks()
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our $my_nick;
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# our own nick is always last, then ordered by the people we spoke to most
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# recently and the people who were speaking most recently
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return
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$a->{nick} eq $my_nick ? 1 :
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$b->{nick} eq $my_nick ? -1 :
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compare_times()
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|| Xchat::nickcmp( $a->{nick}, $b->{nick} );
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# $selections->{ $b->{nick} } <=> $selections->{ $a->{nick} }
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# || $b->{lasttalk} <=> $a->{lasttalk}
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}
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sub matching_files {
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my $word = shift;
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my ($file, $input_dir) = fileparse( $word );
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my $dir = expand_tilde( $input_dir );
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if( opendir my $dir_handle, $dir ) {
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my @files;
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if( $file ) {
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@files = grep {
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#Xchat::print( $_ );
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/^\Q$file/ } readdir $dir_handle;
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} else {
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@files = readdir $dir_handle;
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}
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return map {
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File::Spec->catfile( $input_dir, $_ );
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} sort
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grep { !/^[.]{1,2}$/ } @files;
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} else {
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return ();
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}
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}
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# Remove completion related data for tabs that are closed
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sub close_context {
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my $context = Xchat::get_context;
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delete $completions{$context};
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delete $last_visit{$context};
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return Xchat::EAT_NONE;
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}
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# track visit times
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sub focus_tab {
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$last_visit{Xchat::get_context()} = time();
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return Xchat::EAT_NONE;
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}
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# keep track of the last time a message was addressed to someone
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# a message is considered addressed to someone if their nick is used followed
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# by the completion suffix
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sub track_selected {
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my $input = $_[1][0];
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return Xchat::EAT_NONE unless defined $input;
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my $suffix = Xchat::get_prefs( "completion_suffix" );
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for( grep defined, $input =~ /^(.+)\Q$suffix/, $_[0][0] ) {
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if( in_channel( $_ ) ) {
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$selected{Xchat::get_context()}{$_} = time();
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last;
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}
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}
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return Xchat::EAT_NONE;
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}
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# if a user is in the current channel
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# user_info() can also be used instead of the loop
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sub in_channel {
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my $target = shift;
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for my $nick ( nicks() ) {
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if( $nick eq $target ) {
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return 1;
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}
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}
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return 0;
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}
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# list of nicks in the current channel
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sub nicks {
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return map { $_->{nick} } Xchat::get_list( "users" );
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}
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# remove people from the selected list when they leave the channel
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sub clean_selected {
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delete $selected{ Xchat::get_context() }{$_[0][0]};
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return Xchat::EAT_NONE;
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}
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# Longest common substring
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# Used for partial completion when using non-cycling completion
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sub lcs {
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my @nicks = @{+shift};
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return "" if @nicks == 0;
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return $nicks[0] if @nicks == 1;
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my $substring = shift @nicks;
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while(@nicks) {
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$substring = common_string( $substring, shift @nicks );
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}
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return $substring;
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}
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sub common_string {
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my ($nick1, $nick2) = @_;
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my $index = 0;
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$index++ while(
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($index < length $nick1) && ($index < length $nick2) &&
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lc(substr( $nick1, $index, 1 )) eq lc(substr( $nick2, $index, 1 ))
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);
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return substr( $nick1, 0, $index );
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}
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sub expand_tilde {
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my $file = shift;
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$file =~ s/^~/home_dir()/e;
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return $file;
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}
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sub home_dir {
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return $base_path if $base_path;
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if ( $^O eq "MSWin32" ) {
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return $ENV{USERPROFILE};
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} else {
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return ((getpwuid($>))[7] || $ENV{HOME} || $ENV{LOGDIR});
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}
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}
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