/usr/lib/x86_64-linux-gnu/perl5/5.22/Prima/Themes.pm is in libprima-perl 1.28-1.4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 | #
# Copyright (c) 1997-2003 The Protein Laboratory, University of Copenhagen
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# Created by Dmitry Karasik <dmitry@karasik.eu.org>
#
# $Id: Themes.pm,v 1.7 2007/09/13 15:12:25 dk Exp $
use strict;
use Prima;
package Prima::Themes;
use vars qw(%themes %data $load_rc_file);
use constant INSTALLED => 0;
use constant CALLBACK => 1;
use constant PROFILE => 2;
use constant MODULE => 3;
use constant INSTALL => 4;
# install implicit property 'theme' selector
push @Prima::Object::hooks, \&hook;
# load and execute theme from rc file
load_rc(1) if $load_rc_file || !defined $load_rc_file;
sub hook
{
my ( $object, $profile, $default) = @_;
if ( exists $default-> {theme} || exists $profile-> {theme}) {
my $theme = exists($profile-> {theme}) ? $profile-> {theme} : $default-> {theme};
# execute explicitly selected theme
execute( $themes{$theme}, $object, $profile, $default)
if exists $themes{$theme};
} else {
# execute for all installed themes
execute( $themes{$_}, $object, $profile, $default)
for grep { $themes{$_}-> [INSTALLED] } keys %themes;
}
};
sub load_rc
{
my $install = defined( $_[0]) ? $_[0] : 1;
eval "use Prima::Utils;"; die $@ if $@;
my $f = Prima::Utils::path('themes');
if ( $f && -f $f && open F, '<'.$f) {
while ( <F>) {
next if m/^\s*#/;
chomp;
my @r = split(',', $_, 3);
next unless defined $r[0] && defined $r[1];
$data{$r[1]} = $r[2];
eval "use $r[0];";
warn( "** warning: error loading module `$r[0]': $@\n"), next if $@;
warn( "** warning: theme `$r[1]' is not defined\n"), next
unless loaded($r[1]);
install($r[1]) if $install;
}
close F;
}
}
# saves currently installed modules
sub save_rc
{
eval "use Prima::Utils;"; die $@ if $@;
my $f = Prima::Utils::path('themes');
return 0 unless open F, '>'.$f;
for ( keys %themes) {
next unless $themes{$_}-> [INSTALLED] && $themes{$_}-> [MODULE];
my $data = defined($data{$_}) ? $data{$_} : '';
print F "$themes{$_}->[MODULE],$_,$data\n";
}
return close F;
}
# register theme
sub register
{
my ( $file, $theme, $profile, $merger, $installer) = @_;
deregister($_) if $themes{$theme};
$themes{$theme} = [
0, # activity flag
$merger, # merger routine, our own if undef
$profile, # theme profile
$file, # theme file
$installer,# installer/uninstaller routine
];
}
# kill theme
sub deregister
{
uninstall($_[0]);
delete $themes{$_[0]};
}
# list registered themes
sub list { keys %themes }
# list active themes
sub list_active { grep { $themes{$_}-> [INSTALLED] } keys %themes }
# checks if theme is loaded
sub loaded { defined($_[0]) ? exists $themes{$_[0]} : undef }
# checks if theme is active
sub active { (defined($_[0]) && exists $themes{$_[0]}) ? $themes{$_[0]}-> [INSTALLED] : undef }
# unistall all themes and select new
sub select
{
my @themes = @_;
uninstall (keys %themes);
install (@themes);
}
# load themes from files
sub load { for ( @_) { eval "use Prima::themes::$_"; die $@ if $@ }}
# makes 'use Prima::Themes qw(mytheme theme1);' possible
sub import {
shift;
my $install;
for ( @_ ) {
if ( $_ eq ':install') {
$install = 1;
} else {
$install ? install($_) : load($_);
}
}
}
# install themes
sub install
{
for ( @_) {
my $theme = $_;
next if !exists $themes{$theme} || $themes{$theme}-> [INSTALLED];
if ( $themes{$theme}-> [INSTALL]) {
$themes{$theme}-> [INSTALLED] = $themes{$theme}-> [INSTALL]-> ($theme, 1);
} else {
$themes{$theme}-> [INSTALLED] = 1;
}
}
}
# uninstall themes
sub uninstall
{
for ( @_) {
my $theme = $_;
next if !exists $themes{$theme} || !$themes{$theme}-> [INSTALLED];
$themes{$theme}-> [INSTALL]-> ($theme, 0) if $themes{$theme}-> [INSTALL];
$themes{$theme}-> [INSTALLED] = 0;
}
}
# theme data property
sub data
{
return $data{$_[0]} unless $#_;
$data{$_[0]} = $_[1];
}
# default merger procedure
sub merger
{
my ( $object, $profile, $default, $new) = @_;
$profile-> {$_} = $new-> {$_} for keys %$new;
}
# applies theme during Object::profile_add
sub execute
{
my ( $instance, $object, $profile, $default) = @_;
my $merger = $instance-> [CALLBACK] || \&merger;
my $profiles = $instance-> [PROFILE];
return unless $profiles;
my $i;
for ( $i = 0; $i < @$profiles; $i += 2) {
$merger-> ( $object, $profile, $default, $$profiles[$i+1]) if $object-> isa($$profiles[$i]);
}
}
package Prima::Themes::Proxy;
sub new
{
return bless { object => $_[1] }, $_[0];
}
sub AUTOLOAD
{
no strict;
my ($method) = $AUTOLOAD =~ /::([^:]+)$/;
return shift-> {object}-> $method( @_);
}
# do not fordward DESTROY
sub DESTROY {}
1;
=pod
=head1 NAME
Prima::Themes - object themes management
=head1 DESCRIPTION
Provides layer for theme registration in Prima. Themes are loosely grouped
alternations of default class properties and behavior, by default stored in
C<Prima/themes> subdirectory. The theme realization is implemented as interception
of object profile during its creation, inside C<::profile_add>. Various themes
apply various alterations, one way only - once an object is applied a theme,
it cannot be neither changed nor revoked thereafter.
Theme configuration can be stored in an rc file, F<~/.prima/themes>, and is
loaded automatically, unless C<$Prima::Themes::load_rc_file> explicitly set to C<0>
before loading the C<Prima::Themes> module. In effect, any Prima application
not aware of themes can be coupled with themes in the rc file by the following:
perl -MPrima::Themes program
C<Prima::Themes> namespace provides registration and execution functionality.
C<Prima::Themes::Proxy> is a class for overriding certain methods, for internal
realization of a theme.
For interactive theme selection use F<examples/theme.pl> sample program.
=head1 SYNOPSIS
# register a theme file
use Prima::Themes qw(color);
# or
use Prima::Themes; load('color');
# list registered themes
print Prima::Themes::list;
# install a theme
Prima::Themes::install('cyan');
# list installed themes
print Prima::Themes::list_active;
# create object with another theme while 'cyan' is active
Class->create( theme => 'yellow');
# remove a theme
Prima::Themes::uninstall('cyan');
=head1 Prima::Themes
=over 4
=item load @THEME_MODULES
Load THEME_MODULES from files via C<use> clause, dies on error.
Can be used instead of explicit C<use>.
A loaded theme file may register one or more themes.
=item register $FILE, $THEME, $MATCH, $CALLBACK, $INSTALLER
Registers a previously loaded theme. $THEME is a unique string identifier.
$MATCH is an array of pairs, where the first item is a class name,
and the second is an arbitrary scalar parameter. When a new object is created,
its class is matched via C<isa> to each given class name,
and if matched, the $CALLBACK routine is called with the following parameters:
object, default profile, user profile, second item of the matched pair.
If $CALLBACK is C<undef>, the default L<merger> routine is called,
which treats the second items of the pairs as hashes of the same format as
the default and user profiles.
The theme is inactive until C<install> is called. If $INSTALLER subroutine is
passed, it is called during install and uninstall, with two parameters, the
name of the theme and boolean install/uninstall flag. When install flag is 1,
the theme is about to be installed; the subroutine is expected to return a
boolean success flag. Otherwise, subroutine return value is not used.
$FILE is used to indicate the file in which the theme is stored.
=item deregister $THEME
Un-registers $THEME.
=item install @THEMES
Installs previosuly loaded and registered loaded THEMES; the installed themes
are now used to match new objects.
=item uninstall @THEMES
Uninstalls loaded THEMES.
=item list
Returns the list of registered themes.
=item list_active
Returns the list of installed themes.
=item loaded $THEME
Return 1 if $THEME is registered, 0 otherwise.
=item active $THEME
Return 1 if $THEME is installed, 0 otherwise.
=item select @THEMES
Uninstalls all currently installed themes, and installs THEMES instead.
=item merger $OBJECT, $PROFILE_DEFAULT, $PROFILE_USER, $PROFILE_THEME
Default profile merging routine, merges $PROFILE_THEME into $PROFILE_USER
by keys from $PROFILE_DEFAULT.
=item load_rc [ $INSTALL = 1 ]
Reads data F<~/.prima/themes> and loads listed modules.
If $INSTALL = 1, installs the themes from the rc file.
=item save_rc
Writes configuration of currently installed themes into rc file,
returns success flag. If success flag is 0, C<$!> contains the error.
=back
=head1 Prima::Themes::Proxy
An instance of C<Prima::Themes::Proxy>, created as
Prima::Themes::Proxy-> new( $OBJECT)
is a non-functional wrapper for any Perl object $OBJECT. All methods of $OBJECT,
except C<AUTOLOAD>, C<DESTROY>, and C<new>, are forwarded to $OBJECT
itself transparently. The class can be used, for example, to deny all
changes to C<lineWidth> inside object's painting routine:
package ConstLineWidth;
use vars qw(@ISA);
@ISA = qw(Prima::Themes::Proxy);
sub lineWidth { 1 } # line width is always 1 now!
Prima::Themes::register( '~/lib/constlinewidth.pm', 'constlinewidth',
[ 'Prima::Widget' => {
onPaint => sub {
my ( $object, $canvas) = @_;
$object-> on_paint( ConstLineWidth-> new( $canvas));
},
} ]
);
=head1 AUTHOR
Dmitry Karasik, E<lt>dmitry@karasik.eu.orgE<gt>.
=head1 FILES
F<~/.prima/themes>
=head1 SEE ALSO
L<Prima>, L<Prima::Object>, F<examples/themes.pl>
=cut
|