1 |
#!/opt/bin/perl |
2 |
|
3 |
use Cwd (); |
4 |
use Encode (); |
5 |
|
6 |
use Gtk2 -init; |
7 |
use Gtk2::Gdk::Keysyms; |
8 |
|
9 |
use Gtk2::CV; |
10 |
|
11 |
use Gtk2::CV::ImageWindow; |
12 |
use Gtk2::CV::Schnauzer; |
13 |
|
14 |
BEGIN { |
15 |
require Gtk2::CV::Plugin; |
16 |
require "$ENV{HOME}/.cvrc" if -r "$ENV{HOME}/.cvrc"; |
17 |
} |
18 |
|
19 |
use Gtk2::CV::Plugin::NameCluster; |
20 |
use Gtk2::CV::Plugin::RCluster; |
21 |
|
22 |
Gtk2::Rc->parse (Gtk2::CV::find_rcfile "gtkrc"); |
23 |
|
24 |
use File::Spec; |
25 |
|
26 |
my $mainwin; |
27 |
my $viewer; |
28 |
my $viewer_count; |
29 |
my $schnauzer; |
30 |
my $info; |
31 |
my $help; |
32 |
|
33 |
my $schnauzer_idx = 0; |
34 |
|
35 |
sub new_schnauzer { |
36 |
my $s = new Gtk2::CV::Schnauzer; |
37 |
|
38 |
$s->signal_connect_after (key_press_event => \&std_keys); |
39 |
$s->signal_connect (activate => sub { |
40 |
my $label = sprintf "%s (%d)", |
41 |
(File::Spec->splitpath ($_[1]))[2], |
42 |
-s $_[1]; |
43 |
$info->set_label ($label); |
44 |
$viewer->load_image ($_[1]) if $viewer; # TODO: error, or chose ANY viewer |
45 |
}); |
46 |
|
47 |
Gtk2::CV::Plugin->call (new_schnauzer => $s); |
48 |
|
49 |
$s |
50 |
} |
51 |
|
52 |
sub new_viewer { |
53 |
my $self = new Gtk2::CV::ImageWindow; |
54 |
|
55 |
$viewer_count++; |
56 |
|
57 |
$self->set_title ("CV: Image"); |
58 |
|
59 |
$self->signal_connect (key_press_event => sub { |
60 |
$viewer = $_[0]; |
61 |
|
62 |
my $key = $_[1]->keyval; |
63 |
my $state = $_[1]->state; |
64 |
|
65 |
if ($state * "control-mask" && $key == $Gtk2::Gdk::Keysyms{c}) { |
66 |
my $viewer = new_viewer (); |
67 |
$viewer->set_image ($_[0]->{image}); |
68 |
$viewer->show_all; |
69 |
1 |
70 |
} else { |
71 |
&std_keys |
72 |
or $schnauzer->signal_emit (key_press_event => $_[1]) |
73 |
} |
74 |
}); |
75 |
$self->signal_connect (delete_event => sub { $_[0]->destroy; 0 }); |
76 |
$self->signal_connect (destroy => sub { |
77 |
$viewer = undef if $viewer == $_[0]; |
78 |
|
79 |
main_quit Gtk2 unless --$viewer_count; |
80 |
|
81 |
0 |
82 |
}); |
83 |
|
84 |
$self->signal_connect (button3_press_event => sub { |
85 |
$mainwin->visible |
86 |
? $mainwin->hide |
87 |
: $mainwin->show_all; |
88 |
|
89 |
1 |
90 |
}); |
91 |
|
92 |
Gtk2::CV::Plugin->call (new_imagewindow => $self); |
93 |
|
94 |
$self |
95 |
} |
96 |
|
97 |
sub std_keys { |
98 |
my $key = $_[1]->keyval; |
99 |
my $state = $_[1]->state; |
100 |
|
101 |
my $ctrl = $state * "control-mask"; |
102 |
|
103 |
if ($key == $Gtk2::Gdk::Keysyms{q}) { |
104 |
$viewer->destroy; |
105 |
} elsif ($ctrl && $key == $Gtk2::Gdk::Keysyms{v}) { |
106 |
my $w = new Gtk2::Window; |
107 |
|
108 |
$w->set_role ("schnauzer"); |
109 |
$w->set_title ("CV: Schnauzer"); |
110 |
$w->add (my $s = new_schnauzer); |
111 |
$s->set_dir (File::Spec->curdir); |
112 |
$s->set_geometry_hints; |
113 |
$w->show_all; |
114 |
|
115 |
} elsif ($ctrl && $key == $Gtk2::Gdk::Keysyms{h}) { |
116 |
unless ($help) { |
117 |
require Gtk2::PodViewer; |
118 |
|
119 |
$help = new Gtk2::Window; |
120 |
$help->set_role ("help"); |
121 |
$help->set_title ("CV: Help"); |
122 |
$help->set_default_size (500, 300); |
123 |
$help->signal_connect (delete_event => sub { $help->hide; 1 }); |
124 |
|
125 |
$help->add (my $sw = new Gtk2::ScrolledWindow); |
126 |
$sw->add (my $h = new Gtk2::PodViewer); |
127 |
|
128 |
#binmode DATA, ":utf8"; |
129 |
$h->load_string (do { local $/; <DATA> }); |
130 |
} |
131 |
|
132 |
$help->show_all; |
133 |
} else { |
134 |
return 0; |
135 |
} |
136 |
|
137 |
1 |
138 |
} |
139 |
|
140 |
{ |
141 |
$viewer = new_viewer; |
142 |
$::cur_viewer = $viewer; |
143 |
|
144 |
$schnauzer = new_schnauzer; |
145 |
|
146 |
$mainwin = new Gtk2::Window; |
147 |
$mainwin->set_role ("main"); |
148 |
$mainwin->set_title ("CV"); |
149 |
$mainwin->add (my $vbox = new Gtk2::VBox); |
150 |
$mainwin->signal_connect (delete_event => sub { $mainwin->hide; 1 }); |
151 |
|
152 |
$vbox->add ($schnauzer); |
153 |
$vbox->pack_end (my $frame = new Gtk2::Frame, 0, 0, 0); |
154 |
$frame->add (my $hbox = new Gtk2::HBox 0, 0); |
155 |
$hbox->pack_start ((new Gtk2::Label "Info: "), 0, 0, 0); |
156 |
$hbox->pack_end (my $labelwindow = new Gtk2::EventBox, 1, 1, 0); |
157 |
$labelwindow->add ($info = new Gtk2::Label); |
158 |
$labelwindow->signal_connect_after (size_request => sub { $_[1]->width (0); 0 }); |
159 |
$info->set (selectable => 1, xalign => 0, justify => "left"); |
160 |
|
161 |
$schnauzer->set_geometry_hints; |
162 |
} |
163 |
|
164 |
if (@ARGV) { |
165 |
my $show_first = sub { |
166 |
$schnauzer->show_all; |
167 |
$schnauzer->handle_key ($Gtk2::Gdk::Keysyms{space}, []); |
168 |
$viewer->show_all; |
169 |
}; |
170 |
|
171 |
@ARGV == 1 && -d $ARGV[0] |
172 |
? $schnauzer->set_dir (Glib::filename_to_unicode shift, $show_first) |
173 |
: $schnauzer->set_paths ([map Glib::filename_to_unicode $_, @ARGV], 1, $show_first); |
174 |
} else { |
175 |
$schnauzer->set_dir (File::Spec->curdir, sub { |
176 |
$mainwin->show_all; |
177 |
$viewer->show_all; |
178 |
}); |
179 |
} |
180 |
|
181 |
main Gtk2; |
182 |
|
183 |
Gtk2::CV::flush_aio; |
184 |
|
185 |
__DATA__ |
186 |
|
187 |
=encoding utf-8 |
188 |
|
189 |
=head1 NAME |
190 |
|
191 |
cv - a fast gtk+ image viewer loosely modeled after XV |
192 |
|
193 |
=head1 SYNOPSIS |
194 |
|
195 |
cv [file...] |
196 |
|
197 |
=head1 FEATURES |
198 |
|
199 |
CV is supposed to work similar to the venerable XV image viewer, just |
200 |
faster. Why faster? |
201 |
|
202 |
=over 4 |
203 |
|
204 |
=item * optimized directory scanning algorithm |
205 |
|
206 |
The directory scanning in CV uses some tricks that - on most modern |
207 |
filesystems - makes it possible to detect filetypes faster than stat()'ing |
208 |
every file. This makes CV suitable for directories with lots of files |
209 |
(10000+). |
210 |
|
211 |
This algorithm is quite unprecise - it doesn't make a difference between |
212 |
files, device nodes, symlinks and the like, and filetype detection is done |
213 |
using the file extension only. |
214 |
|
215 |
On the positive side, it is usually many orders of magnitude faster than |
216 |
traditional scanning techniques (good for directories with 10000 or |
217 |
100000+ files). |
218 |
|
219 |
=item * queuing for all time-consuming background tasks |
220 |
|
221 |
All tasks, such as unlinking files or generating thumbnails, that can be |
222 |
done in the background will be done so - no waiting required, even when |
223 |
changing directories. |
224 |
|
225 |
=item * use of asynchronous I/O |
226 |
|
227 |
CV tries to use asynchronous I/O whereever it makes sense, for example |
228 |
while scanning directories, waiting for stat data, unlinking files or |
229 |
generating thumbnails. This usually decreases scanning times for large |
230 |
directories a bit (especially on RAID devices and over NFS) and makes CV |
231 |
much more interactive. |
232 |
|
233 |
=item * fast image loading |
234 |
|
235 |
The time span between the user issuing a command and displaying the new |
236 |
image should be as small as possible. CV uses optimized (especially |
237 |
for JPEG) loading functions and sacrifices some quality (e.g no gamma |
238 |
correction, although this might change) to achieve this speed. |
239 |
|
240 |
=item * fast thumbnail creation |
241 |
|
242 |
Thumbnail creation uses both CPU and Disk-I/O. CV interleaves both, so |
243 |
on modern CPUs, thumbnailing is usually limited by I/O speed. Thumbnail |
244 |
creation for JPEGs has been specially optimized and can even take |
245 |
advantage of multiple CPUs. |
246 |
|
247 |
=item * minimum optical clutter |
248 |
|
249 |
CV has no menus or other user interface elements that take up a lot of |
250 |
screen space (or are useful for beginning users). The schnauzer windows |
251 |
can also be somewhat crowded. |
252 |
|
253 |
The point of an image viewer is viewing images, not a nice GUI. This is |
254 |
similar to XV's behaviour. |
255 |
|
256 |
=item * efficient (and hard to learn) user interface |
257 |
|
258 |
CV uses key combinations. A lot. If you are an experienced XV user, you |
259 |
will find most of these keys familiar. If not, CV might be hard to use at |
260 |
first, but will be an efficient tool later. |
261 |
|
262 |
=item * multi-window GUI |
263 |
|
264 |
CV doesn't force you to use a specific layout, instead it relies on your |
265 |
window manager, thus enabling you to chose whatever layout that suits you |
266 |
most. |
267 |
|
268 |
=item * i18n'ed filename handling throughout |
269 |
|
270 |
As long as glib can recognize your filename encoding (either UTF-8 or |
271 |
locale-specific, depending on the setting of G_BROKEN_FILENAMES) and you |
272 |
have the relevant fonts, CV will display your filenames correctly. |
273 |
|
274 |
=item * extensible through plug-ins |
275 |
|
276 |
I have weird plug-ins that access remote databases to find a |
277 |
directory. This is not likely to be of any use to other people. Likewise, |
278 |
others might have weird requirements I cannot dream of. |
279 |
|
280 |
=item * filename clustering |
281 |
|
282 |
Among the standard plug-ins is a filename clustering plug-in, that (in |
283 |
case of tens of thousands images in one directory) might be able to |
284 |
cluster similar names together. |
285 |
|
286 |
=back |
287 |
|
288 |
=head1 DESCRIPTION |
289 |
|
290 |
=head2 THE IMAGE WINDOW |
291 |
|
292 |
You can use the following keys in the image window: |
293 |
|
294 |
q quit the program |
295 |
< half the image size |
296 |
> double the image size |
297 |
, shrink the image by 10% |
298 |
. enlarge the image by 10% |
299 |
n reset to normal size |
300 |
m maximize to screensize |
301 |
M maximize to screensize, respecting image aspect |
302 |
ctrl-m toggle maxpect-always mode |
303 |
ctrl-sift-m toggle using current image size as max image size |
304 |
u uncrop |
305 |
r set scaling mode to 'nearest' (fastest) |
306 |
s set scaling mode to 'bilinear' (default) |
307 |
shift-s set scaling mode to 'hyper' (slowest) |
308 |
t rotate clockwise 90° |
309 |
T rotate counterclockwise° |
310 |
a apply all rotations loslessly to a jpeg file (using exiftran) |
311 |
ctrl-v open a new visual schnauzer window for the current dir |
312 |
ctrl-c clone the current image window |
313 |
ctrl-e run an editor ($CV_EDITOR or "gimp") on the current image |
314 |
ctrl-p fire up the print dialog |
315 |
escape cancel a crop action |
316 |
|
317 |
And when playing movies, these additional keys are active: |
318 |
|
319 |
left rewind by 10 seconds |
320 |
right forward by 10 seconds |
321 |
down rewind by 60 seconds |
322 |
up forward by 60 seconds |
323 |
pg_up rewind by 600 seconds |
324 |
pg_down forward by 600 seconds |
325 |
o toggle on-screen display |
326 |
p pause/unpause |
327 |
escape stop playing |
328 |
9 turn volume down |
329 |
0 turn volume up |
330 |
|
331 |
Any other keys will be sent to the default schnauzer window, which can be |
332 |
toggled on and off by right-clicking into the image window. |
333 |
|
334 |
Left-clicking into the image window will let you crop the image (usually |
335 |
to zoom into large images that CV scales down). |
336 |
|
337 |
=head2 THE VISUAL SCHNAUZER |
338 |
|
339 |
Any image-loading action in a schnauzer window acts on the |
340 |
"last-recently-activated" imagewindow, which currently is simply the last |
341 |
image window that received a keypress. |
342 |
|
343 |
You can use the following keys in the schnauzer window: |
344 |
|
345 |
ctrl-space, |
346 |
space move to and display next image |
347 |
ctrl-backspace, |
348 |
backspace move to and display previous image |
349 |
ctrl-return, |
350 |
return display selected picture, or enter directory |
351 |
|
352 |
cursor keys move selection |
353 |
page-up move one page up |
354 |
page-down move one page down |
355 |
home move to first file |
356 |
end move to last file |
357 |
|
358 |
ctrl-a select all files |
359 |
ctrl-shift-a select all files currently displayed in the schnauzer window |
360 |
ctrl-d delete selected files WITHOUT ASKING AGAIN |
361 |
ctrl-g force generation of thumbnais for the selected files |
362 |
ctrl-s rescan current direcory or files updates/deletes etc. |
363 |
ctrl-u update selected (or all) icons if neccessary |
364 |
ctrl-l don't use, will become a plug-in eventually |
365 |
|
366 |
^ go to parent directory (caret). |
367 |
|
368 |
0-9, |
369 |
a-z find the first filename beginning with this letter |
370 |
|
371 |
Right-clicking into the schnauzer window displays a pop-up menu with |
372 |
additional actions. |
373 |
|
374 |
=head3 SELECTION |
375 |
|
376 |
You can select entries in the Schnauzer in a variety of ways: |
377 |
|
378 |
=over 4 |
379 |
|
380 |
=item Keyboard |
381 |
|
382 |
Moving the cursor with the keyboard will first deselect all files and then |
383 |
select the file you moved to. |
384 |
|
385 |
=item Clicking |
386 |
|
387 |
Clicking on an entry will select the one you clicked and deselect all |
388 |
others. |
389 |
|
390 |
=item Shift-Clicking |
391 |
|
392 |
Shift-clicking will toggle the selection on the entry under the mouse. |
393 |
|
394 |
=item Dragging |
395 |
|
396 |
Dragging will select all entries between the one selected when pushing the |
397 |
button and the one selected when releasing the button. If you move above |
398 |
or below the schnauzer area while drag-selecting, the schnauzer will move |
399 |
up/down one row twice per second. In addition, horizontal mouse movement |
400 |
acts as a kind of invisible horizontal scrollbar. |
401 |
|
402 |
=item Hint: double-click works while click-selecting |
403 |
|
404 |
You can double-click any image while click-selecting to display it |
405 |
without stopping the selection process. This will act as if you normally |
406 |
double-clicked the image to display it, and will toggle the selection |
407 |
twice, resulting in no change. |
408 |
|
409 |
=back |
410 |
|
411 |
=head1 FILES |
412 |
|
413 |
When starting, CV runs the F<.cvrc> file in your F<$HOME> directory as if |
414 |
it were a perl script. in that, you will mostly load plug-ins. |
415 |
|
416 |
Example: |
417 |
|
418 |
system "fping -q -t 10 ether" |
419 |
or require "/fs/cv/cvplugin.pl"; |
420 |
|
421 |
This will load a plug-in, but only if the machine I<ether> is reachable |
422 |
(supposedly the plug-in is networked in some way :). |
423 |
|
424 |
=head1 ENVIRONMENT |
425 |
|
426 |
=over 4 |
427 |
|
428 |
=item CV_EDITOR |
429 |
|
430 |
The program that gets executed when the user presses C<CTRL-e> in the |
431 |
Schnauzer or image window. The default is C<gimp>. |
432 |
|
433 |
=item CV_PRINT_DESTINATION |
434 |
|
435 |
The default (perl-style) destination to use in the print dialog. |
436 |
|
437 |
=item CV_TRASHCAN |
438 |
|
439 |
When set, must point to a directory where all files that are deleted are |
440 |
moved to. If unset, files that are deleted are really being deleted. |
441 |
|
442 |
=back |
443 |
|
444 |
=head1 SECURITY CONSIDERATIONS |
445 |
|
446 |
CV uses Pixbuf to load non-JPEG images. Pixbuf is not considered safe for |
447 |
this purpose, though (from the gtk-2.2 release notes): |
448 |
|
449 |
"While efforts have been made to make gdk-pixbuf robust against invalid |
450 |
images, using gdk-pixbuf to load untrusted data is not recommended, due to |
451 |
the likelyhood that there are additional problems where an invalid image |
452 |
could cause gdk-pixbuf to crash or worse." |
453 |
|
454 |
=head1 BUGS/TODO |
455 |
|
456 |
Lots of functionality is missing. |
457 |
|
458 |
Pixbuf doesn't always honor G_BROKEN_FILENAMES, so accessing files with |
459 |
names incompatible with utf-8 might fail. |
460 |
|
461 |
rotate on disk |
462 |
lots of ui issues |
463 |
save(?) |
464 |
preferences |
465 |
|
466 |
=head1 AUTHOR |
467 |
|
468 |
Marc Lehmann <cv@plan9.de>. |
469 |
|
470 |
=cut |
471 |
|