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