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authorTom Ryder <tom@sanctum.geek.nz>2016-06-19 11:21:56 +1200
committerTom Ryder <tom@sanctum.geek.nz>2016-06-19 11:21:56 +1200
commitb0e8d29860b614b5c76afab17ab85911b36d7694 (patch)
treede4f69d338a699382b271d7dc2f1d11cc3bfd579 /urxvt/ext
parent21659014244bb08d2d8943125bc37291c8377bd1 (diff)
downloaddotfiles-b0e8d29860b614b5c76afab17ab85911b36d7694.tar.gz
dotfiles-b0e8d29860b614b5c76afab17ab85911b36d7694.zip
Add "selection" urxvt script
I don't like this very much, I just want something that correctly handles urxvt.cutchars with unicode characters. I'll cut it down and tidy it up shortly in the same way I did with the clip ext.
Diffstat (limited to 'urxvt/ext')
-rw-r--r--urxvt/ext/selection185
1 files changed, 185 insertions, 0 deletions
diff --git a/urxvt/ext/selection b/urxvt/ext/selection
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+#! perl
+
+#:META:X_RESOURCE:%.pattern-0:string:first selection pattern
+
+=head1 NAME
+
+selection - more intelligent selection (enabled by default)
+
+=head1 DESCRIPTION
+
+This extension tries to be more intelligent when the user extends
+selections (double-click and further clicks). Right now, it tries to
+select words, urls and complete shell-quoted arguments, which is very
+convenient, too, if your F<ls> supports C<--quoting-style=shell>.
+
+A double-click usually selects the word under the cursor, further clicks
+will enlarge the selection.
+
+The selection works by trying to match a number of regexes and displaying
+them in increasing order of length. You can add your own regexes by
+specifying resources of the form:
+
+ URxvt.selection.pattern-0: perl-regex
+ URxvt.selection.pattern-1: perl-regex
+ ...
+
+The index number (0, 1...) must not have any holes, and each regex must
+contain at least one pair of capturing parentheses, which will be used for
+the match. For example, the following adds a regex that matches everything
+between two vertical bars:
+
+ URxvt.selection.pattern-0: \\|([^|]+)\\|
+
+Another example: Programs I use often output "absolute path: " at the
+beginning of a line when they process multiple files. The following
+pattern matches the filename (note, there is a single space at the very
+end):
+
+ URxvt.selection.pattern-0: ^(/[^:]+):\
+
+You can look at the source of the selection extension to see more
+interesting uses, such as parsing a line from beginning to end.
+
+This extension also offers following bindable keyboard commands:
+
+=over 4
+
+=item rot13
+
+Rot-13 the selection when activated. Used via keyboard trigger:
+
+ URxvt.keysym.C-M-r: perl:selection:rot13
+
+=back
+
+=cut
+
+sub on_user_command {
+ my ($self, $cmd) = @_;
+
+ $cmd eq "selection:rot13"
+ and $self->selection (map { y/A-Za-z/N-ZA-Mn-za-m/; $_ } $self->selection);
+
+ ()
+}
+
+sub on_init {
+ my ($self) = @_;
+
+ if (defined (my $res = $self->resource ("cutchars"))) {
+ $res = $self->locale_decode ($res);
+ push @{ $self->{patterns} }, qr{\G [\Q$res\E[:space:]]* ([^\Q$res\E[:space:]]+) }x;
+ }
+
+ for (my $idx = 0; defined (my $res = $self->x_resource ("selection.pattern-$idx")); $idx++) {
+ $res = $self->locale_decode ($res);
+ push @{ $self->{patterns} }, qr/$res/;
+ }
+
+ $self->{enabled} = 1;
+
+ push @{ $self->{term}{option_popup_hook} }, sub {
+ ("new selection" => $self->{enabled}, sub { $self->{enabled} = shift })
+ };
+
+ ()
+}
+
+# "find interesting things"-patterns
+my @mark_patterns = (
+# qr{ ([[:word:]]+) }x,
+ qr{ ([^[:space:]]+) }x,
+
+ # common types of "parentheses"
+ qr{ (?<![^[:space:]]) [`'] ([^`']+) [`'] (?![^[:space:]]) }x,
+ qr{ (?<![^[:space:]]) ‘ ([^‘’]+) ’ (?![^[:space:]]) }x,
+ qr{ (?<![^[:space:]]) “ ([^“”]+) ” (?![^[:space:]]) }x,
+
+ qr{ (?<![^[:space:]]) (' [^[:space:]] [^']* ') }x,
+ qr{ (' [^']* [^[:space:]] ') (?![^[:space:]]) }x,
+ qr{ (?<![^[:space:]]) (` [^[:space:]] [^']* ') }x,
+ qr{ (` [^']* [^[:space:]] ') (?![^[:space:]]) }x,
+ qr{ (?<![^[:space:]]) (" [^[:space:]] [^"]* ") }x,
+ qr{ (" [^"]* [^[:space:]] ") (?![^[:space:]]) }x,
+
+ qr{ \{ ([^\{\}]+) \} }x,
+ qr{ \( ([^\(\)]+) \) }x,
+ qr{ \[ ([^\[\]]+) \] }x,
+ qr{ \< ([^\<\>]+) \> }x,
+
+ # urls, just a heuristic
+ qr{(
+ (?:https?://|ftp://|news://|mailto:|file://|\bwww\.)[ab-zA-Z0-9\-\@;\/?:&=%\$_.+!*\x27(),~#]+
+ [ab-zA-Z0-9\-\@;\/?:&=%\$_+*()~] # exclude some trailing characters (heuristic)
+ )}x,
+
+ # shell-like argument quoting, basically always matches
+ qr{\G [\ \t|&;<>()]* (
+ (?:
+ [^\\"'\ \t|&;<>()]+
+ | \\.
+ | " (?: [^\\"]+ | \\. )* "
+ | ' [^']* '
+ )+
+ )}x,
+);
+
+# "correct obvious? crap"-patterns
+my @simplify_patterns = (
+ qr{^"([^\\"'\ \t|&;<>()*?]+)"$}, # "simple" => simple
+ qr{^(.*)[,\-]$}, # strip off trailing , and -
+);
+
+sub on_sel_extend {
+ my ($self, $time) = @_;
+
+ $self->{enabled}
+ or return;
+
+ my ($row, $col) = $self->selection_mark;
+ my $line = $self->line ($row);
+ my $text = $line->t;
+ my $markofs = $line->offset_of ($row, $col);
+ my $curlen = $line->offset_of ($self->selection_end)
+ - $line->offset_of ($self->selection_beg);
+
+ my @matches;
+
+ if ($markofs < $line->l) {
+ study $text; # _really_ helps, too :)
+
+ for my $regex (@mark_patterns, @{ $self->{patterns} }) {
+ while ($text =~ /$regex/g) {
+ if ($-[1] <= $markofs and $markofs <= $+[1]) {
+ my $ofs = $-[1];
+ my $match = $1;
+
+ for my $regex (@simplify_patterns) {
+ if ($match =~ $regex) {
+ $match = $1;
+ $ofs += $-[1];
+ }
+ }
+
+ push @matches, [$ofs, length $match];
+ }
+ }
+ }
+ }
+
+ # whole line
+ push @matches, [0, ($line->end - $line->beg + 1) * $self->ncol];
+
+ for (sort { $a->[1] <=> $b->[1] or $b->[0] <=> $a->[0] } @matches) {
+ my ($ofs, $len) = @$_;
+
+ next if $len <= $curlen;
+
+ $self->selection_beg ($line->coord_of ($ofs));
+ $self->selection_end ($line->coord_of ($ofs + $len));
+ return 1;
+ }
+
+ ()
+}