--- rxvt-unicode/src/perl/searchable-scrollback	2006/01/09 23:06:05	1.4
+++ rxvt-unicode/src/perl/searchable-scrollback	2012/09/04 22:41:12	1.30
@@ -2,10 +2,41 @@
 
 # this extension implements scrollback buffer search
 
+#:META:X_RESOURCE:%:string:activation hotkey keysym
+
+=head1 NAME
+
+searchable-scrollback<hotkey> - incremental scrollback search (enabled by default)
+
+=head1 DESCRIPTION
+
+Adds regex search functionality to the scrollback buffer, triggered
+by a hotkey (default: C<M-s>). While in search mode, normal terminal
+input/output is suspended and a regex is displayed at the bottom of the
+screen.
+
+Inputting characters appends them to the regex and continues incremental
+search. C<BackSpace> removes a character from the regex, C<Up> and C<Down>
+search upwards/downwards in the scrollback buffer, C<End> jumps to the
+bottom. C<Escape> leaves search mode and returns to the point where search
+was started, while C<Enter> or C<Return> stay at the current position and
+additionally stores the first match in the current line into the primary
+selection if the C<Shift> modifier is active.
+
+The regex defaults to "(?i)", resulting in a case-insensitive search. To
+get a case-sensitive search you can delete this prefix using C<BackSpace>
+or simply use an uppercase character which removes the "(?i)" prefix.
+
+See L<perlre> for more info about perl regular expression syntax.
+
+=cut
+
 sub on_init {
    my ($self) = @_;
 
-   my $hotkey = $self->{argv}[0] || "M-s";
+   my $hotkey = $self->{argv}[0]
+                || $self->x_resource ("%")
+                || "M-s";
 
    $self->parse_keysym ($hotkey, "perl:searchable-scrollback:start")
       or warn "unable to register '$hotkey' as scrollback search start hotkey\n";
@@ -13,12 +44,11 @@
    ()
 }
 
-sub on_keyboard_command {
+sub on_user_command {
    my ($self, $cmd) = @_;
 
-   if ($cmd eq "searchable-scrollback:start") {
-      $self->enter;
-   }
+   $cmd eq "searchable-scrollback:start"
+      and $self->enter;
 
    ()
 }
@@ -35,66 +65,72 @@
 
    return if $self->{overlay};
 
-   $self->{pty_ev_events} = $self->pty_ev_events (urxvt::EVENT_NONE);
    $self->{view_start} = $self->view_start;
+   $self->{pty_ev_events} = $self->pty_ev_events (urxvt::EV_NONE);
+   $self->{row} = $self->nrow - 1;
+   $self->{search} = "(?i)";
 
    $self->enable (
       key_press     => \&key_press,
+      tt_write      => \&tt_write,
       refresh_begin => \&refresh,
       refresh_end   => \&refresh,
    );
 
+   $self->{manpage_overlay} = $self->overlay (0, -2, $self->ncol, 1, urxvt::OVERLAY_RSTYLE, 0);
+   $self->{manpage_overlay}->set (0, 0, "scrollback search, see the ${urxvt::RXVTNAME}perl manpage for details");
+
    $self->idle;
 }
 
 sub leave {
    my ($self) = @_;
 
-   delete $self->{overlay};
-
-   $self->disable ("key_press", "refresh_begin", "refresh_end");
-
+   $self->disable ("key_press", "tt_write", "refresh_begin", "refresh_end");
    $self->pty_ev_events ($self->{pty_ev_events});
-   $self->want_refresh;
+
+   delete $self->{manpage_overlay};
+   delete $self->{overlay};
+   delete $self->{history};
+   delete $self->{search};
 }
 
 sub idle {
    my ($self) = @_;
 
-   $self->msg ("scrollback search, escape=exit, enter=accept, /=start search, n=next, p=previous, G=bottom");
-
-   delete $self->{in_search};
+   $self->msg ("(escape cancels) /$self->{search}█");
 }
 
 sub search {
-   my ($self) = @_;
-
-   my $row = -$self->view_start;
+   my ($self, $dir) = @_;
 
    delete $self->{found};
+   my $row = $self->{row};
 
-   no re 'eval'; # just to be sure
-   my $re = qr/$self->{search}/;
+   my $search = $self->special_encode ($self->{search});
 
-   while ($row > -$self->nsaved) {
-      my $line = $self->line ($row)
-         or last;
-
-      my $text = $line->t;
-      if ($text =~ /$re/g) {
-         do {
-            push @{ $self->{found} }, [$line->coord_of ($-[0]), $line->coord_of ($+[0])];
-         } while $text =~ /$re/g;
+   no re 'eval'; # just to be sure
+   if (my $re = eval { qr/$search/ }) {
+      while ($self->nrow > $row && $row >= $self->top_row) {
+         my $line = $self->line ($row)
+            or last;
+
+         my $text = $line->t;
+         if ($text =~ /$re/g) {
+            do {
+               push @{ $self->{found} }, [$line->coord_of ($-[0]), $line->coord_of ($+[0])];
+            } while $text =~ /$re/g;
+
+            $self->{row} = $row;
+            $self->view_start (List::Util::min 0, $row - ($self->nrow >> 1));
+            $self->want_refresh;
+            last;
+         }
 
-         $self->view_start (-$row + ($self->nrow >> 1));
-         last;
+         $row = $dir < 0 ? $line->beg - 1 : $line->end + 1;
       }
-
-      $row = $line->beg - 1;
    }
 
-   $self->msg ("enter/type/backspace: /$self->{search}_"
-               . ($self->{found} ? "" : " (not found)"));
    $self->scr_bell unless $self->{found};
 }
 
@@ -103,8 +139,11 @@
 
    return unless $self->{found};
 
-   $self->scr_xor_span (@$_)
-      for @{ $self->{found} };
+   my $xor = urxvt::RS_RVid | urxvt::RS_Blink;
+   for (@{ $self->{found} }) {
+      $self->scr_xor_span (@$_, $xor);
+      $xor = urxvt::RS_RVid;
+   }
 
    ()
 }
@@ -112,47 +151,51 @@
 sub key_press {
    my ($self, $event, $keysym, $string) =  @_;
 
-   if (exists $self->{in_search}) {
-      if ($keysym == 0xff0d || $keysym == 0xff8d) {
-         $self->idle;
-      } elsif ($keysym == 0xff1b) {
-         $self->view_start ($self->{in_search});
-         $self->idle;
-      } elsif ($keysym == 0xff08) {
-         substr $self->{search}, -1, 1, "";
-
-         $self->search;
-      } elsif ($string ne "") {
-         $self->{search} .= $string;
+   delete $self->{manpage_overlay};
 
-         $self->search;
-      }
-   } else {
-      if ($keysym == 0xff0d || $keysym == 0xff8d) {
-         # OK
-         $self->leave;
-      } elsif ($keysym == 0xff1b) {
-         $self->view_start ($self->{view_start});
-         $self->leave;
-      } elsif ($keysym == 0xff52) {
-         $self->view_start ($self->view_start + 1);
-      } elsif ($keysym == 0xff54) {
-         $self->view_start ($self->view_start - 1);
-      } elsif ($string eq "/") {
-         $self->{in_search} = $self->view_start;
-         $self->search;
-      } elsif ($string eq "G") {
-         $self->view_start (0);
-      } elsif ($string eq "n") {
-         $self->search;
-      } elsif ($string eq "p") {
-         # TODO
-      } elsif ($string ne "") {
-         $self->scr_bell;
+   if ($keysym == 0xff0d || $keysym == 0xff8d) { # enter
+      if ($self->{found} && $event->{state} & urxvt::ShiftMask) {
+         my ($br, $bc, $er, $ec) = @{ $self->{found}[0] };
+         $self->selection_beg ($br, $bc);
+         $self->selection_end ($er, $ec);
+         $self->selection_make ($event->{time});
       }
+      $self->leave;
+   } elsif ($keysym == 0xff1b) { # escape
+      $self->view_start ($self->{view_start});
+      $self->leave;
+   } elsif ($keysym == 0xff57) { # end
+      $self->{row} = $self->nrow - 1;
+      $self->view_start (0);
+   } elsif ($keysym == 0xff52) { # up
+      $self->{row}-- if $self->{row} > $self->top_row;
+      $self->search (-1);
+   } elsif ($keysym == 0xff54) { # down
+      $self->{row}++ if $self->{row} < $self->nrow;
+      $self->search (+1);
+   } elsif ($keysym == 0xff08) { # backspace
+      substr $self->{search}, -1, 1, "";
+      $self->search;
+      $self->idle;
+   } elsif ($string !~ /[\x00-\x1f\x80-\xaf]/) {
+      return; # pass to tt_write
    }
 
    1
 }
+
+sub tt_write {
+   my ($self, $data) = @_;
+
+   $self->{search} .= $self->locale_decode ($data);
+
+   $self->{search} =~ s/^\(\?i\)//
+      if $self->{search} =~ /^\(.*[[:upper:]]/;
+
+   $self->search (-1);
+   $self->idle;
+
+   1
+}