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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 1.17 by root, Wed Jun 6 14:34:03 2012 UTC

1#! perl 1#! perl
2
3#:META:X_RESOURCE:%.expr:string:background expression
4#:META:X_RESOURCE:%.enable:boolean:some boolean
5#:META:X_RESOURCE:%.extra.*:value:extra config
2 6
3our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y'; 7our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y';
4$EXPR = ' 8$EXPR = '
5 blur 10, 10,
6 rotate W, H, 50, 50, counter 1/60, repeat_mirror, 9 rotate W, H, 50, 50, counter 1/59.95, repeat_mirror,
7 clip X, Y, W, H, repeat_mirror, 10 clip X, Y, W, H, repeat_mirror,
8 load "/root/pix/das_fette_schwein.jpg" 11 load "/root/pix/das_fette_schwein.jpg"
9'; 12';
13$EXPR = 'solid "red"';
10#$EXPR = 'blur root, 10, 10' 14#$EXPR = 'blur root, 10, 10'
11#$EXPR = 'blur move (root, -x, -y), 5, 5' 15#$EXPR = 'blur move (root, -x, -y), 5, 5'
12#resize load "/root/pix/das_fette_schwein.jpg", w, h 16#resize load "/root/pix/das_fette_schwein.jpg", w, h
13 17
14use Safe; 18use Safe;
15 19
16our ($bgdsl_self, $old, $new); 20our ($bgdsl_self, $old, $new);
17our ($l, $t, $w, $h); 21our ($l, $t, $w, $h);
18 22
23# enforce at least this interval between updates
24our $MIN_INTERVAL = 1/100;
25
19{ 26{
20 package urxvt::bgdsl; # background language 27 package urxvt::bgdsl; # background language
21 28
22 *repeat_black = \&urxvt::RepeatNone; #TODO wtf 29 *repeat_empty = \&urxvt::RepeatNone;
23 *repeat_wrap = \&urxvt::RepeatNormal; 30 *repeat_tile = \&urxvt::RepeatNormal;
24 *repeat_pad = \&urxvt::RepeatPad; 31 *repeat_pad = \&urxvt::RepeatPad;
25 *repeat_mirror = \&urxvt::RepeatReflect; 32 *repeat_mirror = \&urxvt::RepeatReflect;
26 33
34=head2 PROVIDERS/GENERATORS
35
36=over 4
37
38=item load $path
39
40=cut
41
27 sub load($) { 42 sub load($) {
28 my ($path) = @_; 43 my ($path) = @_;
29 44
30 $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path); 45 $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path);
31 } 46 }
32 47
33 sub root() { 48 sub root() {
49 $new->{rootpmap_sensitive} = 1;
34 die "root op not supported, exg, we need you"; 50 die "root op not supported, exg, we need you";
35 } 51 }
52
53 sub solid($;$$) {
54 my $img = $bgdsl_self->new_img (urxvt::PictStandardARGB32, $_[1] || 1, $_[2] || 1);
55 $img->fill ($_[0]);
56 $img
57 }
58
59=back
60
61=head2 OPERATORS
62
63=over 4
64
65=cut
36 66
37# sub clone($) { 67# sub clone($) {
38# $_[0]->clone 68# $_[0]->clone
39# } 69# }
40 70
… …
71 } 101 }
72 102
73 sub blur($$$) { 103 sub blur($$$) {
74 my ($rh, $rv, $img) = @_; 104 my ($rh, $rv, $img) = @_;
75 105
76 $img = $img->clone;
77 $img->blur ($rh, $rv); 106 $img->blur ($rh, $rv);
78 $img
79 } 107 }
80 108
81 sub contrast($$;$$;$) { 109 sub contrast($$;$$;$) {
82 my $img = pop; 110 my $img = pop;
83 my ($r, $g, $b, $a) = @_; 111 my ($r, $g, $b, $a) = @_;
… …
115 143
116 sub counter($) { 144 sub counter($) {
117 $new->{again} = $_[0]; 145 $new->{again} = $_[0];
118 $bgdsl_self->{counter} + 0 146 $bgdsl_self->{counter} + 0
119 } 147 }
148
149=back
150
151=cut
152
120} 153}
121 154
122sub parse_expr { 155sub parse_expr {
123 my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}"; 156 my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}";
124 die if $@; 157 die if $@;
… …
135 168
136# evaluate the current bg expression 169# evaluate the current bg expression
137sub recalculate { 170sub recalculate {
138 my ($self) = @_; 171 my ($self) = @_;
139 172
140 #TODO: rate limit calls 173 # rate limit evaluation
174
175 if ($self->{next_refresh} > urxvt::NOW) {
176 $self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub {
177 $self->recalculate;
178 });
179 return;
180 }
181
182 $self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL;
183
184 # set environment to evaluate user expression
141 185
142 local $bgdsl_self = $self; 186 local $bgdsl_self = $self;
143 187
144 local $old = $self->{state}; 188 local $old = $self->{state};
145 local $new = my $state = $self->{state} = {}; 189 local $new = my $state = $self->{state} = {};
146 190
147 ($l, $t, $w, $h) = 191 ($l, $t, $w, $h) =
148 $self->get_geometry; 192 $self->get_geometry;
149 193
194 # evaluate user expression
195
150 my $img = eval { $self->{expr}->() }; 196 my $img = eval { $self->{expr}->() };
151 warn $@ if $@;#d# 197 warn $@ if $@;#d#
198 die if !UNIVERSAL::isa $img, "urxvt::img";
199
200 # if the expression is sensitive to external events, prepare reevaluation then
152 201
153 my $repeat; 202 my $repeat;
154 203
155 if (my $again = $state->{again}) { 204 if (my $again = $state->{again}) {
156 $repeat = 1; 205 $repeat = 1;
… …
174 $self->enable (size_change => sub { $_[0]->recalculate }); 223 $self->enable (size_change => sub { $_[0]->recalculate });
175 } else { 224 } else {
176 $self->disable ("size_change"); 225 $self->disable ("size_change");
177 } 226 }
178 227
228 if (delete $state->{rootpmap_sensitive}) {
229 $repeat = 1;
230 $self->enable (rootpmap_change => sub { $_[0]->recalculate });
231 } else {
232 $self->disable ("rootpmap_change");
233 }
234
235 # clear stuff we no longer need
236
179 %$old = (); 237 %$old = ();
180 238
181 unless ($repeat) { 239 unless ($repeat) {
182 delete $self->{state}; 240 delete $self->{state};
183 delete $self->{expr}; 241 delete $self->{expr};
184 } 242 }
185 243
244 # prepare and set background pixmap
245
186 $img = $img->sub_rect (0, 0, $w, $h) 246 $img = $img->sub_rect (0, 0, $w, $h)
187 if $img->w != $w || $img->h != $h; 247 if $img->w != $w || $img->h != $h;
188 248
189 $self->set_background ($img); 249 $self->set_background ($img);
190 $self->scr_recolour (0); 250 $self->scr_recolour (0);

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