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/cvs/rxvt-unicode/src/perl/background
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Comparing rxvt-unicode/src/perl/background (file contents):
Revision 1.8 by root, Tue Jun 5 14:07:47 2012 UTC vs.
Revision 1.13 by root, Tue Jun 5 19:32:29 2012 UTC

1#! perl 1#! perl
2
3#:META:RESOURCE:$$:string:background expression
2 4
3our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y'; 5our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y';
4$EXPR = ' 6$EXPR = '
5 blur 10, 10,
6 rotate W, H, 50, 50, counter 1/60, repeat_mirror, 7 rotate W, H, 50, 50, counter 1/59.95, repeat_mirror,
7 clip X, Y, W, H, repeat_mirror, 8 clip X, Y, W, H, repeat_mirror,
8 load "/root/pix/das_fette_schwein.jpg" 9 load "/root/pix/das_fette_schwein.jpg"
9'; 10';
10#$EXPR = 'blur root, 10, 10' 11#$EXPR = 'blur root, 10, 10'
11#$EXPR = 'blur move (root, -x, -y), 5, 5' 12#$EXPR = 'blur move (root, -x, -y), 5, 5'
… …
14use Safe; 15use Safe;
15 16
16our ($bgdsl_self, $old, $new); 17our ($bgdsl_self, $old, $new);
17our ($l, $t, $w, $h); 18our ($l, $t, $w, $h);
18 19
20# enforce at leats this time between updates
21our $MIN_INTERVAL = 1/100;
22
19{ 23{
20 package urxvt::bgdsl; # background language 24 package urxvt::bgdsl; # background language
21 25
22 *repeat_black = \&urxvt::RepeatNone; #TODO wtf 26 *repeat_black = \&urxvt::RepeatNone; #TODO wtf
23 *repeat_wrap = \&urxvt::RepeatNormal; 27 *repeat_wrap = \&urxvt::RepeatNormal;
… …
29 33
30 $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path); 34 $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path);
31 } 35 }
32 36
33 sub root() { 37 sub root() {
38 $new->{rootpmap_sensitive} = 1;
34 die "root op not supported, exg, we need you"; 39 die "root op not supported, exg, we need you";
35 } 40 }
36 41
37# sub clone($) { 42# sub clone($) {
38# $_[0]->clone 43# $_[0]->clone
… …
71 } 76 }
72 77
73 sub blur($$$) { 78 sub blur($$$) {
74 my ($rh, $rv, $img) = @_; 79 my ($rh, $rv, $img) = @_;
75 80
76 $img = $img->clone;
77 $img->blur ($rh, $rv); 81 $img->blur ($rh, $rv);
78 $img
79 } 82 }
80 83
81 sub contrast($$;$$;$) { 84 sub contrast($$;$$;$) {
82 my $img = pop; 85 my $img = pop;
83 my ($r, $g, $b, $a) = @_; 86 my ($r, $g, $b, $a) = @_;
… …
135 138
136# evaluate the current bg expression 139# evaluate the current bg expression
137sub recalculate { 140sub recalculate {
138 my ($self) = @_; 141 my ($self) = @_;
139 142
140 #TODO: rate limit calls 143 # rate limit evaluation
144
145 if ($self->{next_refresh} > urxvt::NOW) {
146 $self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub {
147 $self->recalculate;
148 });
149 return;
150 }
151
152 $self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL;
153
154 # set environment to evaluate user expression
141 155
142 local $bgdsl_self = $self; 156 local $bgdsl_self = $self;
143 157
144 local $old = $self->{state}; 158 local $old = $self->{state};
145 local $new = my $state = $self->{state} = {}; 159 local $new = my $state = $self->{state} = {};
146 160
147 ($l, $t, $w, $h) = 161 ($l, $t, $w, $h) =
148 $self->get_geometry; 162 $self->get_geometry;
149 163
164 # evaluate user expression
165
150 my $img = eval { $self->{expr}->() }; 166 my $img = eval { $self->{expr}->() };
151 warn $@ if $@;#d# 167 warn $@ if $@;#d#
168
169 # if the expression is sensitive to external events, prepare reevaluation then
152 170
153 my $repeat; 171 my $repeat;
154 172
155 if (my $again = $state->{again}) { 173 if (my $again = $state->{again}) {
156 $repeat = 1; 174 $repeat = 1;
… …
174 $self->enable (size_change => sub { $_[0]->recalculate }); 192 $self->enable (size_change => sub { $_[0]->recalculate });
175 } else { 193 } else {
176 $self->disable ("size_change"); 194 $self->disable ("size_change");
177 } 195 }
178 196
197 if (delete $state->{rootpmap_sensitive}) {
198 $repeat = 1;
199 $self->enable (rootpmap_change => sub { $_[0]->recalculate });
200 } else {
201 $self->disable ("rootpmap_change");
202 }
203
204 # clear stuff we no longer need
205
179 %$old = (); 206 %$old = ();
180 207
181 unless ($repeat) { 208 unless ($repeat) {
182 delete $self->{state}; 209 delete $self->{state};
183 delete $self->{expr}; 210 delete $self->{expr};
184 } 211 }
185 212
213 # prepare and set background pixmap
214
186 $img = $img->sub_rect (0, 0, $w, $h) 215 $img = $img->sub_rect (0, 0, $w, $h)
187 if $img->w != $w || $img->h != $h; 216 if $img->w != $w || $img->h != $h;
188 217
189 $self->set_background ($img); 218 $self->set_background ($img);
190 $self->scr_recolour (0); 219 $self->scr_recolour (0);

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