factored all the visual stuff out of prompt_replace into its own file.

1 files changed, 184 insertions, 0 deletions

diff --git a/prompt_info/visual.pl b/prompt_info/visual.pl
new file mode 100644
index 0000000..5941fe0
--- /dev/null
+++ b/prompt_info/visual.pl
@@ -0,0 +1,184 @@
+use strict;
+use warnings;
+
+use Irssi;
+use Irssi::TextUI;              # for sbar_items_redraw
+use Data::Dumper;
+
+
+
+our $VERSION = "0.1";
+our %IRSSI =
+  (
+   authors         => "shabble",
+   contact         => 'shabble+irssi@metavore.org, shabble@#irssi/Freenode',
+   name            => "prompt_info",
+   description     => "Helper script for dynamically adding text "
+   . "into the input-bar prompt.",
+   license         => "Public Domain",
+   changed         => "24/7/2010"
+  );
+
+sub DEBUG () { 1 }
+#sub DEBUG () { 0 }
+
+my $region_active = 0;
+
+my ($term_w, $term_h) = (0, 0);
+
+# visual region selected.
+my ($region_start, $region_end) = (0, 0);
+my $region_content = '';
+
+sub update_terminal_size {
+
+    my @stty_data = qx/stty -a/;
+    my $line = $stty_data[0];
+
+    # linux
+    # speed 38400 baud; rows 36; columns 126; line = 0;
+    if ($line =~ m/rows (\d+); columns (\d+);/) {
+        $term_h = $1;
+        $term_w = $2;
+    # osx
+    # speed 9600 baud; 40 rows; 235 columns;
+    } elsif ($line =~ m/(\d+) rows; (\d+) columns;/) {
+        $term_h = $1;
+        $term_w = $2;
+    } else {
+        # guess?
+        $term_h = 24;
+        $term_w = 80;
+    }
+
+    print "Terminal detected as $term_w cols by $term_h rows" if DEBUG;
+}
+
+sub visual_subcmd_handler {
+    my ($data, $server, $item) = @_;
+    $data =~ s/\s+$//g; # strip trailing whitespace.
+    Irssi::command_runsub('visual', $data, $server, $item);
+}
+
+sub init {
+
+    # misc faff
+    Irssi::command_bind('visual', \&visual_subcmd_handler);
+    Irssi::command_bind('visual toggle', \&cmd_toggle_visual);
+    Irssi::command_bind('visual clear',  \&cmd_clear_visual);
+
+    Irssi::command("^BIND ^F /visual toggle");
+    Irssi::command("^BIND ^G /visual clear");
+
+    Irssi::command_bind 'print_test',
+        sub {
+            Irssi::gui_printtext(0, 0, '%8hello there%n');
+            };
+
+    # redraw interception
+    Irssi::signal_add_last('command redraw',   \&augment_redraw);
+    Irssi::signal_add_first('gui key pressed', \&ctrl_l_intercept);
+
+    # for updating the overlay.
+    Irssi::signal_add_last ('gui key pressed', \&key_pressed);
+
+    # things to refresh the overlay for.
+    Irssi::signal_add('window changed',           \&uberprompt_refresh);
+    Irssi::signal_add('window name changed',      \&uberprompt_refresh);
+    Irssi::signal_add('window changed automatic', \&uberprompt_refresh);
+    Irssi::signal_add('window item changed',      \&uberprompt_refresh);
+
+    Irssi::signal_add('terminal resized', \&update_terminal_size);
+
+    # so we know where the bottom line is
+    update_terminal_size();
+
+
+}
+sub augment_redraw {
+    print "Redraw called" if DEBUG;
+    uberprompt_refresh();
+    Irssi::timeout_add_once(10, \&refresh_visual_overlay, 0);
+}
+
+
+sub cmd_toggle_visual {
+
+    $region_active = not $region_active;
+
+    if ($region_active) {
+        $region_start = _pos();
+        $region_end   = 0; # reset end marker.
+        print "visual mode started at $region_start" if DEBUG;
+    } else {
+        $region_end = _pos();
+        print "Visual mode ended at $region_end" if DEBUG;
+
+        if ($region_end > $region_start) {
+            my $input = Irssi::parse_special('$L', 0, 0);
+            my $str = substr($input, $region_start, $region_end - $region_start);
+            print "Region selected: $str" if DEBUG;
+        } else {
+            print "Invalid region selection: [ $region_start - $region_end ]"
+              if DEBUG;
+            $region_start = $region_end = 0;
+        }
+        cmd_clear_visual();
+    }
+}
+
+sub ctrl_l_intercept {
+    my $key = shift;
+
+    if ($key == 12) { # C-l
+        print "C-l pressed" if DEBUG;
+        Irssi::command("redraw");
+        Irssi::signal_stop();
+    } elsif ($key == 10) { # RET
+        _clear_visual_region();
+    }
+}
+
+sub key_pressed {
+    # this handler needs to be last so the actual character is printed by irssi
+    # before we overlay on it. Otherwise things are all a bit off-by-1
+    return unless $region_active;
+
+    refresh_visual_overlay();
+}
+
+sub _clear_visual_region {
+    print "Clearing Region markers" if DEBUG;
+    $region_end = 0;
+    $region_start = 0;
+}
+
+
+sub refresh_visual_overlay {
+
+    my $end_pos = $region_end;
+    $end_pos  ||= _pos(); # if not set, take current position as end.
+
+    my $len = $end_pos - $region_start;
+    return unless $len; # no point drawing an empty overlay
+
+    my $input = Irssi::parse_special('$L');
+    my $offset = $prompt_item->{size} + $region_start;
+
+    my $text = substr($input, $region_start, $len);
+
+    print "printing '$text' at $offset [$region_start, $end_pos] ($len)" if DEBUG;
+
+    $text = '%8' . $text . '%8';
+    _draw_overlay($offset, $text, $len);
+
+}
+
+sub _draw_overlay {
+    my ($offset, $text, $len) = @_;
+    Irssi::gui_printtext($offset, $term_h, $text);
+}
+
+sub _pos {
+    return Irssi::gui_input_get_pos();
+}