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Comparing rxvt-unicode/src/perl/background (file contents):
Revision 1.2 by root, Tue Jun 5 11:00:40 2012 UTC vs.
Revision 1.20 by root, Wed Jun 6 22:01:45 2012 UTC

1#! perl 1#! perl
2 2
3our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", &x, &y'; 3#:META:X_RESOURCE:%.expr:string:background expression
4#:META:X_RESOURCE:%.enable:boolean:some boolean
5#:META:X_RESOURCE:%.extra.:value:extra config
6
7our $EXPR = 'move X, Y, load "MagnoliaAlpha.png"';
8#$EXPR = '
9# rotate W, H, 50, 50, counter 1/59.95, repeat_mirror,
10# clip X, Y, W, H, repeat_mirror,
11# load "/root/pix/das_fette_schwein.jpg"
12#';
13#$EXPR = 'solid "red"';
4#$EXPR = 'blur root, 10, 10' 14#$EXPR = 'blur root, 10, 10'
5#$EXPR = 'blur move (root, -x, -y), 5, 5' 15#$EXPR = 'blur move (root, -x, -y), 5, 5'
6#resize load "/root/pix/das_fette_schwein.jpg", w, h 16#resize load "/root/pix/das_fette_schwein.jpg", w, h
7 17
8use Safe; 18use Safe;
9 19
20our ($bgdsl_self, $old, $new);
21our ($l, $t, $w, $h);
22
23# enforce at least this interval between updates
24our $MIN_INTERVAL = 1/100;
25
10{ 26{
11 package urxvt::bgdsl::vars;
12
13 our ($self, $old, $new);
14 our ($x, $y, $w, $h);
15
16 package urxvt::bgdsl; # background language 27 package urxvt::bgdsl; # background language
17 28
18 *repeat_black = \&urxvt::RepeatNone; #TODO wtf 29# *repeat_empty = \&urxvt::RepeatNone;
19 *repeat_wrap = \&urxvt::RepeatNormal; 30# *repeat_tile = \&urxvt::RepeatNormal;
20 *repeat_pad = \&urxvt::RepeatPad; 31# *repeat_pad = \&urxvt::RepeatPad;
21 *repeat_mirror = \&urxvt::RepeatReflect; 32# *repeat_mirror = \&urxvt::RepeatReflect;
33
34=head2 PROVIDERS/GENERATORS
35
36=over 4
37
38=item load $path
39
40=cut
22 41
23 sub load($) { 42 sub load($) {
24 my ($path) = @_; 43 my ($path) = @_;
25 44
26 $new->{load}{$path} = $old->{load}{$path} || $self->new_img_from_file ($path); 45 $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path);
27 } 46 }
28 47
29 sub root() { 48 sub root() {
49 $new->{rootpmap_sensitive} = 1;
30 die "root op not supported, exg, we need you"; 50 die "root op not supported, exg, we need you";
31 } 51 }
32 52
53 sub solid($;$$) {
54 my $img = $bgdsl_self->new_img (urxvt::PictStandardARGB32, $_[1] || 1, $_[2] || 1);
55 $img->fill ($_[0]);
56 $img
57 }
58
59=back
60
61=head2 VARIABLES
62
63=over 4
64
65=cut
66
67 sub X() { $new->{position_sensitive} = 1; $l }
68 sub Y() { $new->{position_sensitive} = 1; $t }
69 sub W() { $new->{size_sensitive} = 1; $w }
70 sub H() { $new->{size_sensitive} = 1; $h }
71
72 sub now() { urxvt::NOW }
73
74 sub again($) {
75 $new->{again} = $_[0];
76 }
77
78 sub counter($) {
79 $new->{again} = $_[0];
80 $bgdsl_self->{counter} + 0
81 }
82
83=back
84
85=head2 OPERATORS
86
87=over 4
88
89=cut
90
91# sub clone($) {
92# $_[0]->clone
93# }
94
95 sub clip($;$$;$$) {
96 my $img = pop;
97 $img->sub_rect ($_[0], $_[1], $_[2] || W, $_[3] || H)
98 }
99
33 sub resize($$$) { 100 sub resize($$$) {
34 $_[0]->scale ($_[1], $_[2]) 101 my $img = pop;
102 $img->scale ($_[0], $_[1])
35 } 103 }
36 104
105 # TODO: ugly
37 sub move($$$) { 106 sub move($$;$) {
38 # TODO: must be simpler 107 my $img = pop->clone;
39 $_[0]->transform ($_[0]->w, $_[0]->h, $_[1], 108 $img->move ($_[0], $_[1]);
109 $img
110# my $img = pop;
111# $img->sub_rect (
112# $_[0], $_[1],
113# $img->w, $img->h,
114# $_[2],
115# )
116 }
117
118 sub rotate($$$$$$) {
119 my $img = pop;
120 $img->rotate (
40 1, 0, -$_[2], 121 $_[0],
41 0, 1, -$_[3], 122 $_[1],
42 0, 0, 1, 123 $_[2] * $img->w * .01,
124 $_[3] * $img->h * .01,
125 $_[4] * (3.14159265 / 180),
43 ) 126 )
44 } 127 }
45 128
46 sub rotate($$$$) {
47 $_[0]->rotate ($_[0], $_[1], $_[2], $_[3] * (3.14159265 / 180))
48 }
49
50 sub blur($$$) { 129 sub blur($$$) {
51 my ($img, $rh, $rv) = @_; 130 my ($rh, $rv, $img) = @_;
52 131
53 $img = $img->clone;
54 $img->clone->blur ($rh, $rv); 132 $img->blur ($rh, $rv);
55 $img
56 } 133 }
57 134
58 sub contrast($$;$$;$) { 135 sub contrast($$;$$;$) {
136 my $img = pop;
59 my ($img, $r, $g, $b, $a) = @_; 137 my ($r, $g, $b, $a) = @_;
138
60 ($g, $b) = ($r, $r) if @_ < 4; 139 ($g, $b) = ($r, $r) if @_ < 4;
61 $a = 1 if @_ < 5; 140 $a = 1 if @_ < 5;
141
62 $img = $img->clone; 142 $img = $img->clone;
63 $img->contrast ($r, $g, $b, $a); 143 $img->contrast ($r, $g, $b, $a);
64 $img 144 $img
65 } 145 }
66 146
67 sub brightness($$;$$;$) { 147 sub brightness($$;$$;$) {
148 my $img = pop;
68 my ($img, $r, $g, $b, $a) = @_; 149 my ($r, $g, $b, $a) = @_;
150
69 ($g, $b) = ($r, $r) if @_ < 4; 151 ($g, $b) = ($r, $r) if @_ < 4;
70 $a = 1 if @_ < 5; 152 $a = 1 if @_ < 5;
153
71 $img = $img->clone; 154 $img = $img->clone;
72 $img->brightness ($r, $g, $b, $a); 155 $img->brightness ($r, $g, $b, $a);
73 $img 156 $img
74 } 157 }
75 158
76 sub x() { $new->{position_sensitive} = 1; $x } 159=back
77 sub y() { $new->{position_sensitive} = 1; $y }
78 sub w() { $new->{size_sensitive} = 1; $w }
79 sub h() { $new->{size_sensitive} = 1; $h }
80 sub now() { urxvt::NOW }
81 160
82 sub again($) { 161=cut
83 $new->{again} = $_[0];
84 }
85 162
86 sub counter($) {
87 $new->{again} = $_[0];
88 $self->{counter}++ + 0
89 }
90} 163}
91 164
92sub parse_expr { 165sub parse_expr {
93 my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}"; 166 my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}";
94 die if $@; 167 die if $@;
… …
97 170
98# compiles a parsed expression 171# compiles a parsed expression
99sub set_expr { 172sub set_expr {
100 my ($self, $expr) = @_; 173 my ($self, $expr) = @_;
101 174
102 local $Data::Dumper::Deparse=1; use Data::Dumper; warn Dumper $expr;#d#
103 $self->{expr} = $expr; 175 $self->{expr} = $expr;
104 $self->recalculate; 176 $self->recalculate;
105} 177}
106 178
107# evaluate the current bg expression 179# evaluate the current bg expression
108sub recalculate { 180sub recalculate {
109 my ($self) = @_; 181 my ($self) = @_;
110 182
183 # rate limit evaluation
184
185 if ($self->{next_refresh} > urxvt::NOW) {
186 $self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub {
187 $self->recalculate;
188 });
189 return;
190 }
191
192 $self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL;
193
194 # set environment to evaluate user expression
195
111 local $urxvt::bgdsl::vars::self = $self; 196 local $bgdsl_self = $self;
112 197
113 local $urxvt::bgdsl::vars::old = $self->{state}; 198 local $old = $self->{state};
114 local $urxvt::bgdsl::vars::new = my $state = $self->{state} = {}; 199 local $new = my $state = $self->{state} = {};
115 200
116 ($urxvt::bgdsl::vars::x, $urxvt::bgdsl::vars::y, $urxvt::bgdsl::vars::w, $urxvt::bgdsl::vars::h) = 201 ($l, $t, $w, $h) =
117 $self->get_geometry; 202 $self->get_geometry;
203
204 # evaluate user expression
118 205
119 my $img = eval { $self->{expr}->() }; 206 my $img = eval { $self->{expr}->() };
120 warn $@ if $@;#d# 207 warn $@ if $@;#d#
208 die if !UNIVERSAL::isa $img, "urxvt::img";
209
210 # if the expression is sensitive to external events, prepare reevaluation then
121 211
122 my $repeat; 212 my $repeat;
123 213
124 if (my $again = $state->{again}) { 214 if (my $again = $state->{again}) {
125 $repeat = 1; 215 $repeat = 1;
126 $state->{again} = urxvt::timer->new->after ($again)->cb (sub { $self->recalculate }); 216 $state->{timer} = $again == $old->{again}
217 ? $old->{timer}
218 : urxvt::timer->new->after ($again)->interval ($again)->cb (sub {
219 ++$self->{counter};
220 $self->recalculate
221 });
127 } 222 }
128 223
129 if (delete $state->{position_sensitive}) { 224 if (delete $state->{position_sensitive}) {
130 $repeat = 1; 225 $repeat = 1;
131 $self->enable (position_change => sub { $_[0]->recalculate }); 226 $self->enable (position_change => sub { $_[0]->recalculate });
… …
138 $self->enable (size_change => sub { $_[0]->recalculate }); 233 $self->enable (size_change => sub { $_[0]->recalculate });
139 } else { 234 } else {
140 $self->disable ("size_change"); 235 $self->disable ("size_change");
141 } 236 }
142 237
143 # TODO: install handlers for geometry changes &c 238 if (delete $state->{rootpmap_sensitive}) {
239 $repeat = 1;
240 $self->enable (rootpmap_change => sub { $_[0]->recalculate });
241 } else {
242 $self->disable ("rootpmap_change");
243 }
144 244
145 warn $img; 245 # clear stuff we no longer need
246
247 %$old = ();
248
249 unless ($repeat) {
250 delete $self->{state};
251 delete $self->{expr};
252 }
253
254 # prepare and set background pixmap
255
256 $img = $img->sub_rect (0, 0, $w, $h)
257 if $img->w != $w || $img->h != $h;
258
146 $self->set_background ($img); 259 $self->set_background ($img);
147 $self->scr_recolour (0); 260 $self->scr_recolour (0);
148 $self->want_refresh; 261 $self->want_refresh;
149} 262}
150 263

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