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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 1.15 by root, Tue Jun 5 22:46:50 2012 UTC

1#! perl 1#! perl
2
3#:META:RESOURCE:$$:string:background expression
4#:META:RESOURCE:$$-enable:boolean:some boolean
2 5
3our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y'; 6our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y';
4$EXPR = ' 7$EXPR = '
5 blur 10, 10,
6 rotate W, H, 50, 50, counter 1/60, repeat_mirror, 8 rotate W, H, 50, 50, counter 1/59.95, repeat_mirror,
7 clip X, Y, W, H, repeat_mirror, 9 clip X, Y, W, H, repeat_mirror,
8 load "/root/pix/das_fette_schwein.jpg" 10 load "/root/pix/das_fette_schwein.jpg"
9'; 11';
12$EXPR = 'solid "red"';
10#$EXPR = 'blur root, 10, 10' 13#$EXPR = 'blur root, 10, 10'
11#$EXPR = 'blur move (root, -x, -y), 5, 5' 14#$EXPR = 'blur move (root, -x, -y), 5, 5'
12#resize load "/root/pix/das_fette_schwein.jpg", w, h 15#resize load "/root/pix/das_fette_schwein.jpg", w, h
13 16
14use Safe; 17use Safe;
15 18
16our ($bgdsl_self, $old, $new); 19our ($bgdsl_self, $old, $new);
17our ($l, $t, $w, $h); 20our ($l, $t, $w, $h);
21
22# enforce at leats this time between updates
23our $MIN_INTERVAL = 1/100;
18 24
19{ 25{
20 package urxvt::bgdsl; # background language 26 package urxvt::bgdsl; # background language
21 27
22 *repeat_black = \&urxvt::RepeatNone; #TODO wtf 28 *repeat_black = \&urxvt::RepeatNone; #TODO wtf
23 *repeat_wrap = \&urxvt::RepeatNormal; 29 *repeat_wrap = \&urxvt::RepeatNormal;
24 *repeat_pad = \&urxvt::RepeatPad; 30 *repeat_pad = \&urxvt::RepeatPad;
25 *repeat_mirror = \&urxvt::RepeatReflect; 31 *repeat_mirror = \&urxvt::RepeatReflect;
26 32
33=head2 PROVIDERS/GENERATORS
34
35=over 4
36
37=item load $path
38
39=cut
40
27 sub load($) { 41 sub load($) {
28 my ($path) = @_; 42 my ($path) = @_;
29 43
30 $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path); 44 $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path);
31 } 45 }
32 46
33 sub root() { 47 sub root() {
48 $new->{rootpmap_sensitive} = 1;
34 die "root op not supported, exg, we need you"; 49 die "root op not supported, exg, we need you";
35 } 50 }
51
52 sub solid($;$$) {
53 my $img = $bgdsl_self->new_img (urxvt::PictStandardARGB32, $_[1] || 1, $_[2] || 1);
54 $img->fill ($_[0]);
55 $img
56 }
57
58=back
59
60=head2 OPERATORS
61
62=over 4
63
64=cut
36 65
37# sub clone($) { 66# sub clone($) {
38# $_[0]->clone 67# $_[0]->clone
39# } 68# }
40 69
… …
71 } 100 }
72 101
73 sub blur($$$) { 102 sub blur($$$) {
74 my ($rh, $rv, $img) = @_; 103 my ($rh, $rv, $img) = @_;
75 104
76 $img = $img->clone;
77 $img->blur ($rh, $rv); 105 $img->blur ($rh, $rv);
78 $img
79 } 106 }
80 107
81 sub contrast($$;$$;$) { 108 sub contrast($$;$$;$) {
82 my $img = pop; 109 my $img = pop;
83 my ($r, $g, $b, $a) = @_; 110 my ($r, $g, $b, $a) = @_;
… …
115 142
116 sub counter($) { 143 sub counter($) {
117 $new->{again} = $_[0]; 144 $new->{again} = $_[0];
118 $bgdsl_self->{counter} + 0 145 $bgdsl_self->{counter} + 0
119 } 146 }
147
148=back
149
150=cut
151
120} 152}
121 153
122sub parse_expr { 154sub parse_expr {
123 my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}"; 155 my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}";
124 die if $@; 156 die if $@;
… …
135 167
136# evaluate the current bg expression 168# evaluate the current bg expression
137sub recalculate { 169sub recalculate {
138 my ($self) = @_; 170 my ($self) = @_;
139 171
140 #TODO: rate limit calls 172 # rate limit evaluation
173
174 if ($self->{next_refresh} > urxvt::NOW) {
175 $self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub {
176 $self->recalculate;
177 });
178 return;
179 }
180
181 $self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL;
182
183 # set environment to evaluate user expression
141 184
142 local $bgdsl_self = $self; 185 local $bgdsl_self = $self;
143 186
144 local $old = $self->{state}; 187 local $old = $self->{state};
145 local $new = my $state = $self->{state} = {}; 188 local $new = my $state = $self->{state} = {};
146 189
147 ($l, $t, $w, $h) = 190 ($l, $t, $w, $h) =
148 $self->get_geometry; 191 $self->get_geometry;
149 192
193 # evaluate user expression
194
150 my $img = eval { $self->{expr}->() }; 195 my $img = eval { $self->{expr}->() };
151 warn $@ if $@;#d# 196 warn $@ if $@;#d#
197 die if !UNIVERSAL::isa $img, "urxvt::img";
198
199 # if the expression is sensitive to external events, prepare reevaluation then
152 200
153 my $repeat; 201 my $repeat;
154 202
155 if (my $again = $state->{again}) { 203 if (my $again = $state->{again}) {
156 $repeat = 1; 204 $repeat = 1;
… …
174 $self->enable (size_change => sub { $_[0]->recalculate }); 222 $self->enable (size_change => sub { $_[0]->recalculate });
175 } else { 223 } else {
176 $self->disable ("size_change"); 224 $self->disable ("size_change");
177 } 225 }
178 226
227 if (delete $state->{rootpmap_sensitive}) {
228 $repeat = 1;
229 $self->enable (rootpmap_change => sub { $_[0]->recalculate });
230 } else {
231 $self->disable ("rootpmap_change");
232 }
233
234 # clear stuff we no longer need
235
179 %$old = (); 236 %$old = ();
180 237
181 unless ($repeat) { 238 unless ($repeat) {
182 delete $self->{state}; 239 delete $self->{state};
183 delete $self->{expr}; 240 delete $self->{expr};
184 } 241 }
185 242
243 # prepare and set background pixmap
244
186 $img = $img->sub_rect (0, 0, $w, $h) 245 $img = $img->sub_rect (0, 0, $w, $h)
187 if $img->w != $w || $img->h != $h; 246 if $img->w != $w || $img->h != $h;
188 247
189 $self->set_background ($img); 248 $self->set_background ($img);
190 $self->scr_recolour (0); 249 $self->scr_recolour (0);

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