[ViewVC] Annotation of: cvs/cvsroot/CV/bin/cv

#!/opt/bin/perl

BEGIN {
   # work around libraries (and perl) outputting numbers in weird formats
   # when they shouldn't. this is somewhat brutal - better suggestions
   # appreciated.
   $ENV{LC_NUMERIC} = "C";
   $ENV{LANG} = delete $ENV{LC_ALL} if exists $ENV{LC_ALL};
}

use Gtk2; qw(-init -threads-init);
BEGIN { Gtk2::Gdk::Threads->enter };

BEGIN {
   require Gtk2::CV::Plugin;
   require "$ENV{HOME}/.cvrc" if -r "$ENV{HOME}/.cvrc";
}

use common::sense;

use Cwd ();
use Encode ();
use File::Glob ();
use Scalar::Util ();

use Gtk2::Gdk::Keysyms;

use Gtk2::CV;

use Gtk2::CV::ImageWindow;
use Gtk2::CV::Schnauzer;

use Carp (); $Carp::MaxArgLen = 256;

use Gtk2::CV::Plugin::NameCluster;
use Gtk2::CV::Plugin::RCluster;
use Gtk2::CV::Plugin::PatRenamer;
use Gtk2::CV::Plugin::MetaCluster;

use AnyEvent::Fork::Template;

Gtk2::CV::Jobber::set_template $AnyEvent::Fork::Template;

# now we can initialize Gtk2 etc.
init Gtk2;

Gtk2::Rc->parse (Gtk2::CV::find_rcfile "gtkrc");

use File::Spec;

my $mainwin;
my $viewer;
my $viewer_count;
my $schnauzer;
my $info;
my $help;

my $schnauzer_idx = 0;

sub new_schnauzer {
   my $s = new Gtk2::CV::Schnauzer;

   $s->signal_connect_after (key_press_event => \&std_keys);
   $s->signal_connect (activate => sub {
      my $label = sprintf "%s (%d)",
                  (Glib::filename_display_name +(File::Spec->splitpath ($_[1]))[2]),
                  -s $_[1];
      $info->set_label ($label);
      $viewer->load_image ($_[1]) if $viewer; # TODO: error, or chose ANY viewer
   });

   Gtk2::CV::Plugin->call (new_schnauzer => $s);

   $s
}

our %VIEWER; # global viewer container so we can propagate signals

$SIG{USR1} = sub {
   # I assume glib calls us in a safe enough context to create an idle watcher
   add Glib::Idle sub {
      $_->reload for values %VIEWER;
      0
   };
};

sub new_viewer {
   my $self = new Gtk2::CV::ImageWindow;

   Scalar::Util::weaken ($VIEWER{$self+0} = $self);

   $viewer_count++;

   $self->set_title ("CV: Image");

   $self->signal_connect (key_press_event => sub {
      $viewer = $_[0];

      my $key = $_[1]->keyval;
      my $state = $_[1]->state;

      if ($state * "control-mask" && $key == $Gtk2::Gdk::Keysyms{c}) {
         my $viewer = new_viewer ();
         $viewer->set_image ($_[0]->{image});
         $viewer->show_all;
         1
      } else {
         &std_keys
            or $schnauzer->signal_emit (key_press_event => $_[1])
      }
   });
   $self->signal_connect (delete_event => sub { $_[0]->destroy; 0 });
   $self->signal_connect (destroy => sub {
      delete $VIEWER{$_[0]+0};
      $viewer = undef if $viewer == $_[0];

      main_quit Gtk2 unless --$viewer_count;

      0
   });

   $self->signal_connect (button3_press_event => sub {
      $mainwin->visible
         ? $mainwin->hide
         : $mainwin->show_all;

      1
   });

   Gtk2::CV::Plugin->call (new_imagewindow => $self);

   $self
}

sub std_keys {
   my $key = $_[1]->keyval;
   my $state = $_[1]->state;

   my $ctrl = $state * "control-mask";

   if ($key == $Gtk2::Gdk::Keysyms{q}) {
      $viewer->destroy;
   } elsif ($ctrl && $key == $Gtk2::Gdk::Keysyms{v}) {
      my $w = new Gtk2::Window;

      $w->set_role ("schnauzer");
      $w->set_title ("CV: Schnauzer");
      $w->add (my $s = new_schnauzer);
      $s->set_dir (File::Spec->curdir);
      $s->set_geometry_hints;
      $w->show_all;

   } elsif ($ctrl && $key == $Gtk2::Gdk::Keysyms{h}) {
      unless ($help) {
         require Gtk2::Ex::PodViewer;

         $help = new Gtk2::Window;
         $help->set_role ("help");
         $help->set_title ("CV: Help");
         $help->set_default_size (500, 300);
         $help->signal_connect (delete_event => sub { $help->hide; 1 });

         $help->add (my $sw = new Gtk2::ScrolledWindow);
         $sw->add (my $h = new Gtk2::Ex::PodViewer);

         #binmode DATA, ":utf8";
         $h->load_string (do { local $/; <DATA> });
      }

      $help->show_all;
   } elsif (!$state && $Gtk2::Gdk::Keysyms{a} <= $key && $key <= $Gtk2::Gdk::Keysyms{z}) {
      #
   } else {
      return 0;
   }

   1
}

&cvrc_boot if defined &cvrc_boot;

{
   $viewer = new_viewer;
   $::cur_viewer = $viewer;

   $schnauzer = new_schnauzer;

   $mainwin = new Gtk2::Window;
   $mainwin->set_role ("main");
   $mainwin->set_title ("CV");
   $mainwin->add (my $vbox = new Gtk2::VBox);
   $mainwin->signal_connect (delete_event => sub { $mainwin->hide; 1 });

   $vbox->add ($schnauzer);
   $vbox->pack_end (my $frame = new Gtk2::Frame, 0, 0, 0);
   $frame->add (my $hbox = new Gtk2::HBox 0, 0);
   $hbox->pack_start ((new Gtk2::Label "Info: "), 0, 0, 0);
   $hbox->pack_end   (my $labelwindow = new Gtk2::EventBox, 1, 1, 0);
   $labelwindow->add ($info = new Gtk2::Label);
   $labelwindow->signal_connect_after (size_request => sub { $_[1]->width (0); 0 });
   $info->set (selectable => 1, xalign => 0, justify => "left");

   $schnauzer->set_geometry_hints;
}

if (@ARGV) {
   my $show_first = sub {
      $schnauzer->show_all;

      # activate first file, but avoid dirs
      my $entry = $schnauzer->{entry}[0];
      my $path = "$entry->[0]/$entry->[1]";

      $schnauzer->handle_key ($Gtk2::Gdk::Keysyms{space}, new Gtk2::Gdk::ModifierType [])
         unless -d $path;

      $viewer->show_all;
   };

   my $force_sort = $ARGV[0] eq "--sort" ? shift @ARGV : 0;

   if (@ARGV == 1 && $ARGV[0] eq "-0r") {
      local $/;
      $schnauzer->set_paths ([split /\x00/, <STDIN>], !$force_sort, $show_first);
   } elsif (@ARGV == 1 && -d $ARGV[0]) {
      $schnauzer->set_dir (shift, $show_first);
   } else {
      if ($ARGV[0] eq "-g") {
         shift @ARGV;
         @ARGV = map +(File::Glob::bsd_glob $_, File::Glob::GLOB_BRACE | File::Glob::GLOB_QUOTE), @ARGV;
      }
      $schnauzer->set_paths ([@ARGV], !$force_sort, $show_first);
   }
} else {
   $schnauzer->set_dir (File::Spec->curdir, sub {
      $mainwin->show_all;
      $viewer->show_all;
   });
}

&cvrc_start if defined &cvrc_start;

main Gtk2;

Gtk2::CV::flush_aio;

__DATA__

=encoding utf-8

=head1 NAME

cv - a fast gtk+ image viewer loosely modeled after XV

=head1 SYNOPSIS

   cv

   cv directory

   cv path...

   cv -g <glob expression...>

   find .. -print0 | cv -0r

   cv --sort ...

=head1 FEATURES

CV is supposed to work similar to the venerable XV image viewer, just
faster. Why faster?

=over 4

=item * optimized directory scanning algorithm

The directory scanning in CV uses some tricks that - on most modern
filesystems - makes it possible to detect filetypes faster than stat()'ing
every file. This makes CV suitable for directories with lots of files
(10000+).

This algorithm is quite unprecise - it doesn't make a difference between
files, device nodes, symlinks and the like, and filetype detection is done
using the file extension only.

On the positive side, it is usually many orders of magnitude faster than
traditional scanning techniques (good for directories with 10000 or
100000+ files).

=item * queuing for all time-consuming background tasks

All tasks, such as unlinking files or generating thumbnails, that can be
done in the background will be done so - no waiting required, even when
changing directories.

=item * use of asynchronous I/O

CV tries to use asynchronous I/O whereever it makes sense, for example
while scanning directories, waiting for stat data, unlinking files or
generating thumbnails. This usually decreases scanning times for large
directories a bit (especially on RAID devices and over NFS) and makes CV
much more interactive.

=item * fast image loading

The time span between the user issuing a command and displaying the new
image should be as small as possible. CV uses optimized (especially
for JPEG) loading functions and sacrifices some quality (e.g no gamma
correction, although this might change) to achieve this speed.

=item * fast thumbnail creation

Thumbnail creation uses both CPU and Disk-I/O. CV interleaves both, so
on modern CPUs, thumbnailing is usually limited by I/O speed. Thumbnail
creation for JPEGs has been specially optimized and can even take
advantage of multiple CPUs.

=item * minimum optical clutter

CV has no menus or other user interface elements that take up a lot of
screen space (or are useful for beginning users). The schnauzer windows
can also be somewhat crowded.

The point of an image viewer is viewing images, not a nice GUI. This is
similar to XV's behaviour.

=item * efficient (and hard to learn) user interface

CV uses key combinations. A lot. If you are an experienced XV user, you
will find most of these keys familiar. If not, CV might be hard to use at
first, but will be an efficient tool later.

=item * multi-window GUI

CV doesn't force you to use a specific layout, instead it relies on your
window manager, thus enabling you to chose whatever layout that suits you
most.

=item * i18n'ed filename handling throughout

As long as glib can recognize your filename encoding (either UTF-8 or
locale-specific, depending on the setting of G_BROKEN_FILENAMES) and you
have the relevant fonts, CV will display your filenames correctly.

=item * extensible through plug-ins

I have weird plug-ins that access remote databases to find a
directory. This is not likely to be of any use to other people. Likewise,
others might have weird requirements I cannot dream of.

=item * filename clustering

Among the standard plug-ins is a filename clustering plug-in, that (in
case of tens of thousands images in one directory) might be able to
cluster similar names together.

=back

=head1 DESCRIPTION

=head2 THE IMAGE WINDOW

You can use the following keys in the image window:

 q            quit the program
 <            half the image size
 >            double the image size
 ,            shrink the image by ~9% (opposite of .)
 .            enlarge the image by 10%
 n            reset to normal size
 m            maximize to screensize
 M            maximize to screensize, respecting image aspect
 ctrl-m       toggle maxpect-always mode
 ctrl-shift-m toggle using current image size as max image size
 u            uncrop
 r            set scaling mode to 'nearest' (fastest)
 s            set scaling mode to 'bilinear' (default)
 t            rotate clockwise 90°
 T            rotate counterclockwise°
 a            apply all rotations loslessly to a jpeg file (using exiftran)
 ctrl-shift-t apply current rotation for future image loads
 ctrl-v       open a new visual schnauzer window for the current dir
 ctrl-c       clone the current image window
 ctrl-e       run an editor ($CV_EDITOR or "gimp") on the current image
 ctrl-p       fire up the print dialog
 ctrl-shift-p same as ctrl-p, but automatically selects "ok"
 escape       cancel a crop action

And when playing movies, these additional keys are active:

 left         rewind by 10 seconds
 right        forward by 10 seconds
 down         rewind by 60 seconds
 up           forward by 60 seconds
 pg_up        rewind by 600 seconds
 pg_down      forward by 600 seconds
 o            toggle on-screen display
 p            pause/unpause
 escape       stop playing
 9            turn volume down
 0            turn volume up

Any other keys will be sent to the default schnauzer window, which can be
toggled on and off by right-clicking into the image window.

Left-clicking into the image window will let you crop the image (usually
to zoom into large images that CV scales down).

=head2 THE VISUAL SCHNAUZER

Any image-loading action in a schnauzer window acts on the
"last-recently-activated" imagewindow, which currently is simply the last
image window that received a keypress.

You can use the following keys in the schnauzer window:

 ctrl-space,
 space        move to and display next image
 ctrl-backspace,
 backspace    move to and display previous image
 ctrl-return,
 return       display selected picture, or enter directory

 cursor keys  move selection
 page-up      move one page up
 page-down    move one page down
 home         move to first file
 end          move to last file

 ctrl-a       select all files
 ctrl-shift-a select all files currently displayed in the schnauzer window
 ctrl-d       delete selected files WITHOUT ASKING AGAIN
 ctrl-g       force generation of thumbnails for the selected files
 ctrl-shift-g remove thumbnails for the selected files
 ctrl-s       rescan current direcory or files updates/deletes etc.
 ctrl-u       update selected (or all) icons if neccessary
 ctrl--       unselected thumbnailed images
 ctrl-+       keep only thumbnailed images, deselect others

 ^            go to parent directory (caret).

 currently disabled:
 0-9,
 a-z          find the first filename beginning with this letter

Right-clicking into the schnauzer window displays a pop-up menu with
additional actions.

=head3 SELECTION

You can select entries in the Schnauzer in a variety of ways:

=over 4

=item Keyboard

Moving the cursor with the keyboard will first deselect all files and then
select the file you moved to.

=item Clicking

Clicking on an entry will select the one you clicked and deselect all
others.

=item Shift-Clicking

Shift-clicking will toggle the selection on the entry under the mouse.

=item Dragging

Dragging will select all entries between the one selected when pushing the
button and the one selected when releasing the button. If you move above
or below the schnauzer area while drag-selecting, the schnauzer will move
up/down one row twice per second. In addition, horizontal mouse movement
acts as a kind of invisible horizontal scrollbar.

=item Hint: double-click works while click-selecting

You can double-click any image while click-selecting to display it
without stopping the selection process. This will act as if you normally
double-clicked the image to display it, and will toggle the selection
twice, resulting in no change.

=back

=head1 FILES

When starting, CV runs the F<.cvrc> file in your F<$HOME> directory as if
it were a perl script. in that, you will mostly load plug-ins.

Example:

   system "fping -q -t 10 ether"
     or require "/fs/cv/cvplugin.pl";

This will load a plug-in, but only if the machine I<ether> is reachable
(supposedly the plug-in is networked in some way :).

=head1 ENVIRONMENT VARIABLES

=over 4

=item CV_EDITOR

The program that gets executed when the user presses C<CTRL-e> in the
Schnauzer or image window. The default is C<gimp>.

=item CV_AUDIO_PLAYER

EXPERIMENTAL: audio playback is now via mpv, this variable is currently
ignored.

Program used to play all sorts of audio (wav, aif, mp3, ogg...), default "play".
Will be called like C<< $CV_AUDIO_PLAYER -- <path> >>.

=item CV_MPLAYER

Program used to play all sorts of video files. Unlike C<CV_AUDIO_PLAYER>,
this really must be some version of the C<mpv> programs, or something that
is very command-line compatible to them.

Note: for video-thumbnailing, mplayer is still used (and hardcoded).

=item CV_PRINT_DESTINATION

The default (perl-style) destination to use in the print dialog.

=item CV_TRASHCAN

When set, must point to a directory where all files that are deleted by
the "Delete Physically" (ctrl-d) action are moved to (other deletion
actions still delete!). If unset, files that are deleted are really being
deleted.

=back

=head1 SIGNALS

Sending CV a SIGUSR1 signal will cause all image viewers to reload the
currently loaded image. This is useful if you use CV as a viewer for
changing data - just run it in the background with some path and each time
the image changes, send it a SIGUSR1.

=head1 SECURITY CONSIDERATIONS

CV uses Pixbuf to load non-JPEG images. Pixbuf is not considered safe for
this purpose, though (from the gtk-2.2 release notes):

"While efforts have been made to make gdk-pixbuf robust against invalid
images, using gdk-pixbuf to load untrusted data is not recommended, due to
the likelyhood that there are additional problems where an invalid image
could cause gdk-pixbuf to crash or worse."

=head1 BUGS/TODO

 Lots of functionality is missing.

 Pixbuf doesn't always honor G_BROKEN_FILENAMES, so accessing files with
 names incompatible with utf-8 might fail.

 rotate on disk
 lots of ui issues
 save(?)
 preferences

=head1 AUTHOR

Marc Lehmann <cv@plan9.de>.

=cut

Revision:	1.105
Committed:	Wed Aug 2 21:56:44 2023 UTC (3 years, 2 months ago) by root
Branch:	MAIN
Changes since 1.104:	+1 -1 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#!/opt/bin/perl
2
3	root	1.97	BEGIN {
4			# work around libraries (and perl) outputting numbers in weird formats
5			# when they shouldn't. this is somewhat brutal - better suggestions
6			# appreciated.
7			$ENV{LC_NUMERIC} = "C";
8			$ENV{LANG} = delete $ENV{LC_ALL} if exists $ENV{LC_ALL};
9			}
10
11	root	1.104	use Gtk2; qw(-init -threads-init);
12			BEGIN { Gtk2::Gdk::Threads->enter };
13	root	1.103
14	root	1.98	BEGIN {
15			require Gtk2::CV::Plugin;
16			require "$ENV{HOME}/.cvrc" if -r "$ENV{HOME}/.cvrc";
17			}
18
19	root	1.80	use common::sense;
20
21	root	1.37	use Cwd ();
22			use Encode ();
23	root	1.72	use File::Glob ();
24	root	1.79	use Scalar::Util ();
25	root	1.37
26	root	1.12	use Gtk2::Gdk::Keysyms;
27
28	root	1.48	use Gtk2::CV;
29
30	root	1.12	use Gtk2::CV::ImageWindow;
31			use Gtk2::CV::Schnauzer;
32
33	root	1.97	use Carp (); $Carp::MaxArgLen = 256;
34	root	1.82
35	root	1.48	use Gtk2::CV::Plugin::NameCluster;
36			use Gtk2::CV::Plugin::RCluster;
37	root	1.81	use Gtk2::CV::Plugin::PatRenamer;
38	root	1.96	use Gtk2::CV::Plugin::MetaCluster;
39	root	1.16
40	root	1.86	use AnyEvent::Fork::Template;
41
42	root	1.87	Gtk2::CV::Jobber::set_template $AnyEvent::Fork::Template;
43
44			# now we can initialize Gtk2 etc.
45			init Gtk2;
46	root	1.77
47	root	1.16	Gtk2::Rc->parse (Gtk2::CV::find_rcfile "gtkrc");
48
49	root	1.20	use File::Spec;
50
51			my $mainwin;
52	root	1.12	my $viewer;
53	root	1.62	my $viewer_count;
54	root	1.12	my $schnauzer;
55	root	1.20	my $info;
56	root	1.21	my $help;
57	root	1.12
58	root	1.25	my $schnauzer_idx = 0;
59
60	root	1.12	sub new_schnauzer {
61	root	1.20	my $s = new Gtk2::CV::Schnauzer;
62	root	1.12
63			$s->signal_connect_after (key_press_event => \&std_keys);
64	root	1.20	$s->signal_connect (activate => sub {
65			my $label = sprintf "%s (%d)",
66	root	1.75	(Glib::filename_display_name +(File::Spec->splitpath ($_[1]))[2]),
67	root	1.20	-s $_[1];
68			$info->set_label ($label);
69	root	1.62	$viewer->load_image ($_[1]) if $viewer; # TODO: error, or chose ANY viewer
70	root	1.20	});
71	root	1.12
72	root	1.40	Gtk2::CV::Plugin->call (new_schnauzer => $s);
73
74	root	1.53	$s
75	root	1.12	}
76
77	root	1.79	our %VIEWER; # global viewer container so we can propagate signals
78
79			$SIG{USR1} = sub {
80			# I assume glib calls us in a safe enough context to create an idle watcher
81			add Glib::Idle sub {
82			$_->reload for values %VIEWER;
83			0
84			};
85			};
86
87	root	1.62	sub new_viewer {
88			my $self = new Gtk2::CV::ImageWindow;
89
90	root	1.79	Scalar::Util::weaken ($VIEWER{$self+0} = $self);
91
92	root	1.62	$viewer_count++;
93
94			$self->set_title ("CV: Image");
95
96			$self->signal_connect (key_press_event => sub {
97			$viewer = $_[0];
98
99			my $key = $_[1]->keyval;
100			my $state = $_[1]->state;
101
102			if ($state * "control-mask" && $key == $Gtk2::Gdk::Keysyms{c}) {
103			my $viewer = new_viewer ();
104			$viewer->set_image ($_[0]->{image});
105			$viewer->show_all;
106			1
107			} else {
108			&std_keys
109			or $schnauzer->signal_emit (key_press_event => $_[1])
110			}
111			});
112	root	1.63	$self->signal_connect (delete_event => sub { $_[0]->destroy; 0 });
113	root	1.62	$self->signal_connect (destroy => sub {
114	root	1.79	delete $VIEWER{$_[0]+0};
115	root	1.62	$viewer = undef if $viewer == $_[0];
116
117			main_quit Gtk2 unless --$viewer_count;
118	root	1.63
119			0
120	root	1.62	});
121
122			$self->signal_connect (button3_press_event => sub {
123			$mainwin->visible
124			? $mainwin->hide
125			: $mainwin->show_all;
126	root	1.63
127	root	1.62	1
128			});
129
130			Gtk2::CV::Plugin->call (new_imagewindow => $self);
131
132			$self
133			}
134
135	root	1.12	sub std_keys {
136			my $key = $_[1]->keyval;
137			my $state = $_[1]->state;
138
139	root	1.21	my $ctrl = $state * "control-mask";
140	root	1.12
141			if ($key == $Gtk2::Gdk::Keysyms{q}) {
142	root	1.62	$viewer->destroy;
143	root	1.12	} elsif ($ctrl && $key == $Gtk2::Gdk::Keysyms{v}) {
144	root	1.20	my $w = new Gtk2::Window;
145	root	1.26
146	root	1.66	$w->set_role ("schnauzer");
147	root	1.26	$w->set_title ("CV: Schnauzer");
148	root	1.20	$w->add (my $s = new_schnauzer);
149			$s->set_dir (File::Spec->curdir);
150	root	1.25	$s->set_geometry_hints;
151	root	1.21	$w->show_all;
152	root	1.25
153	root	1.21	} elsif ($ctrl && $key == $Gtk2::Gdk::Keysyms{h}) {
154			unless ($help) {
155	root	1.73	require Gtk2::Ex::PodViewer;
156	root	1.21
157			$help = new Gtk2::Window;
158	root	1.67	$help->set_role ("help");
159	root	1.26	$help->set_title ("CV: Help");
160	root	1.21	$help->set_default_size (500, 300);
161			$help->signal_connect (delete_event => sub { $help->hide; 1 });
162
163			$help->add (my $sw = new Gtk2::ScrolledWindow);
164	root	1.73	$sw->add (my $h = new Gtk2::Ex::PodViewer);
165	root	1.21
166			#binmode DATA, ":utf8";
167			$h->load_string (do { local $/; <DATA> });
168			}
169
170			$help->show_all;
171	root	1.83	} elsif (!$state && $Gtk2::Gdk::Keysyms{a} <= $key && $key <= $Gtk2::Gdk::Keysyms{z}) {
172	root	1.82	#
173	root	1.12	} else {
174	root	1.43	return 0;
175	root	1.12	}
176
177	root	1.43	1
178	root	1.12	}
179
180	root	1.98	&cvrc_boot if defined &cvrc_boot;
181
182	root	1.20	{
183	root	1.62	$viewer = new_viewer;
184			$::cur_viewer = $viewer;
185	root	1.40
186	root	1.20	$schnauzer = new_schnauzer;
187
188			$mainwin = new Gtk2::Window;
189	root	1.66	$mainwin->set_role ("main");
190	root	1.20	$mainwin->set_title ("CV");
191			$mainwin->add (my $vbox = new Gtk2::VBox);
192	root	1.53	$mainwin->signal_connect (delete_event => sub { $mainwin->hide; 1 });
193	root	1.20
194			$vbox->add ($schnauzer);
195	root	1.22	$vbox->pack_end (my $frame = new Gtk2::Frame, 0, 0, 0);
196	root	1.20	$frame->add (my $hbox = new Gtk2::HBox 0, 0);
197	root	1.45	$hbox->pack_start ((new Gtk2::Label "Info: "), 0, 0, 0);
198			$hbox->pack_end (my $labelwindow = new Gtk2::EventBox, 1, 1, 0);
199			$labelwindow->add ($info = new Gtk2::Label);
200			$labelwindow->signal_connect_after (size_request => sub { $_[1]->width (0); 0 });
201			$info->set (selectable => 1, xalign => 0, justify => "left");
202	root	1.25
203			$schnauzer->set_geometry_hints;
204	root	1.20	}
205	root	1.12
206			if (@ARGV) {
207	root	1.68	my $show_first = sub {
208			$schnauzer->show_all;
209	root	1.85
210			# activate first file, but avoid dirs
211			my $entry = $schnauzer->{entry}[0];
212			my $path = "$entry->[0]/$entry->[1]";
213
214	root	1.89	$schnauzer->handle_key ($Gtk2::Gdk::Keysyms{space}, new Gtk2::Gdk::ModifierType [])
215	root	1.85	unless -d $path;
216
217	root	1.68	$viewer->show_all;
218			};
219
220	root	1.102	my $force_sort = $ARGV[0] eq "--sort" ? shift @ARGV : 0;
221
222	root	1.71	if (@ARGV == 1 && $ARGV[0] eq "-0r") {
223			local $/;
224	root	1.102	$schnauzer->set_paths ([split /\x00/, <STDIN>], !$force_sort, $show_first);
225	root	1.71	} elsif (@ARGV == 1 && -d $ARGV[0]) {
226	root	1.74	$schnauzer->set_dir (shift, $show_first);
227	root	1.71	} else {
228	root	1.72	if ($ARGV[0] eq "-g") {
229			shift @ARGV;
230			@ARGV = map +(File::Glob::bsd_glob $_, File::Glob::GLOB_BRACE \| File::Glob::GLOB_QUOTE), @ARGV;
231			}
232	root	1.102	$schnauzer->set_paths ([@ARGV], !$force_sort, $show_first);
233	root	1.71	}
234	root	1.17	} else {
235	root	1.68	$schnauzer->set_dir (File::Spec->curdir, sub {
236			$mainwin->show_all;
237			$viewer->show_all;
238			});
239	root	1.12	}
240
241	root	1.98	&cvrc_start if defined &cvrc_start;
242
243	root	1.12	main Gtk2;
244	root	1.21
245	root	1.69	Gtk2::CV::flush_aio;
246
247	root	1.21	__DATA__
248	root	1.12
249	root	1.58	=encoding utf-8
250
251	root	1.11	=head1 NAME
252
253	root	1.47	cv - a fast gtk+ image viewer loosely modeled after XV
254	root	1.11
255			=head1 SYNOPSIS
256
257	root	1.84	cv
258
259			cv directory
260
261			cv path...
262
263			cv -g <glob expression...>
264
265			find .. -print0 \| cv -0r
266	root	1.11
267	root	1.102	cv --sort ...
268
269	root	1.47	=head1 FEATURES
270
271			CV is supposed to work similar to the venerable XV image viewer, just
272			faster. Why faster?
273
274			=over 4
275
276			=item * optimized directory scanning algorithm
277
278	root	1.55	The directory scanning in CV uses some tricks that - on most modern
279	root	1.47	filesystems - makes it possible to detect filetypes faster than stat()'ing
280			every file. This makes CV suitable for directories with lots of files
281			(10000+).
282
283			This algorithm is quite unprecise - it doesn't make a difference between
284			files, device nodes, symlinks and the like, and filetype detection is done
285			using the file extension only.
286
287	root	1.55	On the positive side, it is usually many orders of magnitude faster than
288			traditional scanning techniques (good for directories with 10000 or
289			100000+ files).
290
291	root	1.53	=item * queuing for all time-consuming background tasks
292
293			All tasks, such as unlinking files or generating thumbnails, that can be
294			done in the background will be done so - no waiting required, even when
295			changing directories.
296
297	root	1.47	=item * use of asynchronous I/O
298
299			CV tries to use asynchronous I/O whereever it makes sense, for example
300	root	1.53	while scanning directories, waiting for stat data, unlinking files or
301			generating thumbnails. This usually decreases scanning times for large
302			directories a bit (especially on RAID devices and over NFS) and makes CV
303			much more interactive.
304	root	1.47
305			=item * fast image loading
306
307			The time span between the user issuing a command and displaying the new
308			image should be as small as possible. CV uses optimized (especially
309			for JPEG) loading functions and sacrifices some quality (e.g no gamma
310	root	1.55	correction, although this might change) to achieve this speed.
311	root	1.47
312			=item * fast thumbnail creation
313
314	root	1.55	Thumbnail creation uses both CPU and Disk-I/O. CV interleaves both, so
315			on modern CPUs, thumbnailing is usually limited by I/O speed. Thumbnail
316			creation for JPEGs has been specially optimized and can even take
317			advantage of multiple CPUs.
318	root	1.47
319			=item * minimum optical clutter
320
321			CV has no menus or other user interface elements that take up a lot of
322	root	1.55	screen space (or are useful for beginning users). The schnauzer windows
323			can also be somewhat crowded.
324	root	1.47
325			The point of an image viewer is viewing images, not a nice GUI. This is
326			similar to XV's behaviour.
327
328			=item * efficient (and hard to learn) user interface
329
330			CV uses key combinations. A lot. If you are an experienced XV user, you
331			will find most of these keys familiar. If not, CV might be hard to use at
332			first, but will be an efficient tool later.
333
334	root	1.55	=item * multi-window GUI
335
336			CV doesn't force you to use a specific layout, instead it relies on your
337			window manager, thus enabling you to chose whatever layout that suits you
338			most.
339
340	root	1.47	=item * i18n'ed filename handling throughout
341
342			As long as glib can recognize your filename encoding (either UTF-8 or
343	root	1.55	locale-specific, depending on the setting of G_BROKEN_FILENAMES) and you
344			have the relevant fonts, CV will display your filenames correctly.
345	root	1.47
346			=item * extensible through plug-ins
347
348			I have weird plug-ins that access remote databases to find a
349			directory. This is not likely to be of any use to other people. Likewise,
350			others might have weird requirements I cannot dream of.
351
352			=item * filename clustering
353
354			Among the standard plug-ins is a filename clustering plug-in, that (in
355			case of tens of thousands images in one directory) might be able to
356			cluster similar names together.
357
358			=back
359
360	root	1.11	=head1 DESCRIPTION
361
362			=head2 THE IMAGE WINDOW
363
364			You can use the following keys in the image window:
365
366	root	1.50	q quit the program
367			< half the image size
368			> double the image size
369	root	1.101	, shrink the image by ~9% (opposite of .)
370	root	1.50	. enlarge the image by 10%
371			n reset to normal size
372			m maximize to screensize
373			M maximize to screensize, respecting image aspect
374			ctrl-m toggle maxpect-always mode
375	root	1.105	ctrl-shift-m toggle using current image size as max image size
376	root	1.50	u uncrop
377			r set scaling mode to 'nearest' (fastest)
378			s set scaling mode to 'bilinear' (default)
379			t rotate clockwise 90°
380			T rotate counterclockwise°
381	root	1.64	a apply all rotations loslessly to a jpeg file (using exiftran)
382	root	1.90	ctrl-shift-t apply current rotation for future image loads
383	root	1.50	ctrl-v open a new visual schnauzer window for the current dir
384	root	1.63	ctrl-c clone the current image window
385	root	1.50	ctrl-e run an editor ($CV_EDITOR or "gimp") on the current image
386	root	1.57	ctrl-p fire up the print dialog
387	root	1.88	ctrl-shift-p same as ctrl-p, but automatically selects "ok"
388	root	1.50	escape cancel a crop action
389	root	1.11
390	root	1.33	And when playing movies, these additional keys are active:
391
392	root	1.50	left rewind by 10 seconds
393			right forward by 10 seconds
394			down rewind by 60 seconds
395			up forward by 60 seconds
396			pg_up rewind by 600 seconds
397			pg_down forward by 600 seconds
398			o toggle on-screen display
399			p pause/unpause
400			escape stop playing
401			9 turn volume down
402			0 turn volume up
403	root	1.33
404	root	1.47	Any other keys will be sent to the default schnauzer window, which can be
405			toggled on and off by right-clicking into the image window.
406	root	1.11
407	root	1.47	Left-clicking into the image window will let you crop the image (usually
408			to zoom into large images that CV scales down).
409	root	1.11
410			=head2 THE VISUAL SCHNAUZER
411
412	root	1.63	Any image-loading action in a schnauzer window acts on the
413			"last-recently-activated" imagewindow, which currently is simply the last
414			image window that received a keypress.
415
416	root	1.11	You can use the following keys in the schnauzer window:
417
418	root	1.47	ctrl-space,
419	root	1.50	space move to and display next image
420	root	1.47	ctrl-backspace,
421	root	1.50	backspace move to and display previous image
422	root	1.47	ctrl-return,
423	root	1.50	return display selected picture, or enter directory
424	root	1.11
425	root	1.50	cursor keys move selection
426			page-up move one page up
427			page-down move one page down
428			home move to first file
429			end move to last file
430
431			ctrl-a select all files
432			ctrl-shift-a select all files currently displayed in the schnauzer window
433			ctrl-d delete selected files WITHOUT ASKING AGAIN
434	root	1.91	ctrl-g force generation of thumbnails for the selected files
435			ctrl-shift-g remove thumbnails for the selected files
436	root	1.50	ctrl-s rescan current direcory or files updates/deletes etc.
437			ctrl-u update selected (or all) icons if neccessary
438	root	1.76	ctrl-- unselected thumbnailed images
439			ctrl-+ keep only thumbnailed images, deselect others
440	root	1.47
441	root	1.56	^ go to parent directory (caret).
442
443	root	1.103	currently disabled:
444	root	1.47	0-9,
445	root	1.50	a-z find the first filename beginning with this letter
446	root	1.47
447			Right-clicking into the schnauzer window displays a pop-up menu with
448			additional actions.
449
450	root	1.60	=head3 SELECTION
451
452			You can select entries in the Schnauzer in a variety of ways:
453
454			=over 4
455
456			=item Keyboard
457
458			Moving the cursor with the keyboard will first deselect all files and then
459			select the file you moved to.
460
461	root	1.61	=item Clicking
462	root	1.60
463	root	1.61	Clicking on an entry will select the one you clicked and deselect all
464			others.
465	root	1.60
466	root	1.61	=item Shift-Clicking
467
468			Shift-clicking will toggle the selection on the entry under the mouse.
469
470			=item Dragging
471	root	1.60
472			Dragging will select all entries between the one selected when pushing the
473			button and the one selected when releasing the button. If you move above
474			or below the schnauzer area while drag-selecting, the schnauzer will move
475			up/down one row twice per second. In addition, horizontal mouse movement
476			acts as a kind of invisible horizontal scrollbar.
477
478			=item Hint: double-click works while click-selecting
479
480			You can double-click any image while click-selecting to display it
481			without stopping the selection process. This will act as if you normally
482			double-clicked the image to display it, and will toggle the selection
483			twice, resulting in no change.
484
485			=back
486
487	root	1.47	=head1 FILES
488
489			When starting, CV runs the F<.cvrc> file in your F<$HOME> directory as if
490			it were a perl script. in that, you will mostly load plug-ins.
491
492			Example:
493
494			system "fping -q -t 10 ether"
495			or require "/fs/cv/cvplugin.pl";
496
497			This will load a plug-in, but only if the machine I<ether> is reachable
498			(supposedly the plug-in is networked in some way :).
499	root	1.11
500	root	1.79	=head1 ENVIRONMENT VARIABLES
501	root	1.27
502			=over 4
503
504	root	1.38	=item CV_EDITOR
505
506			The program that gets executed when the user presses C<CTRL-e> in the
507			Schnauzer or image window. The default is C<gimp>.
508
509	root	1.70	=item CV_AUDIO_PLAYER
510
511	root	1.94	EXPERIMENTAL: audio playback is now via mpv, this variable is currently
512			ignored.
513
514	root	1.70	Program used to play all sorts of audio (wav, aif, mp3, ogg...), default "play".
515			Will be called like C<< $CV_AUDIO_PLAYER -- <path> >>.
516
517	root	1.92	=item CV_MPLAYER
518
519			Program used to play all sorts of video files. Unlike C<CV_AUDIO_PLAYER>,
520	root	1.99	this really must be some version of the C<mpv> programs, or something that
521			is very command-line compatible to them.
522	root	1.92
523	root	1.93	Note: for video-thumbnailing, mplayer is still used (and hardcoded).
524
525	root	1.27	=item CV_PRINT_DESTINATION
526
527			The default (perl-style) destination to use in the print dialog.
528
529	root	1.38	=item CV_TRASHCAN
530
531	root	1.78	When set, must point to a directory where all files that are deleted by
532			the "Delete Physically" (ctrl-d) action are moved to (other deletion
533			actions still delete!). If unset, files that are deleted are really being
534			deleted.
535	root	1.38
536	root	1.27	=back
537
538	root	1.79	=head1 SIGNALS
539
540			Sending CV a SIGUSR1 signal will cause all image viewers to reload the
541			currently loaded image. This is useful if you use CV as a viewer for
542			changing data - just run it in the background with some path and each time
543			the image changes, send it a SIGUSR1.
544
545	root	1.23	=head1 SECURITY CONSIDERATIONS
546
547	root	1.54	CV uses Pixbuf to load non-JPEG images. Pixbuf is not considered safe for
548			this purpose, though (from the gtk-2.2 release notes):
549	root	1.23
550			"While efforts have been made to make gdk-pixbuf robust against invalid
551			images, using gdk-pixbuf to load untrusted data is not recommended, due to
552			the likelyhood that there are additional problems where an invalid image
553			could cause gdk-pixbuf to crash or worse."
554
555	root	1.11	=head1 BUGS/TODO
556	root	1.23
557	root	1.47	Lots of functionality is missing.
558
559			Pixbuf doesn't always honor G_BROKEN_FILENAMES, so accessing files with
560	root	1.54	names incompatible with utf-8 might fail.
561	root	1.11
562			rotate on disk
563			lots of ui issues
564			save(?)
565			preferences
566
567			=head1 AUTHOR
568
569			Marc Lehmann <cv@plan9.de>.
570
571			=cut
572	root	1.1