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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 1.19 by root, Wed Jun 6 20:55:37 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;
22 33
34=head2 PROVIDERS/GENERATORS
35
36=over 4
37
38=item load $path
39
40=cut
41
23 sub load($) { 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 $new->{rootpmap_sensitive} = 1;
30 die "root op not supported, exg, we need you"; 50 die "root op not supported, exg, we need you";
31 } 51 }
32 52
53 sub solid($;$$) {
54 my $img = $bgdsl_self->new_img (urxvt::PictStandardARGB32, $_[1] || 1, $_[2] || 1);
55 $img->fill ($_[0]);
56 $img
57 }
58
59=back
60
61=head2 OPERATORS
62
63=over 4
64
65=cut
66
67# sub clone($) {
68# $_[0]->clone
69# }
70
71 sub clip($$$$$;$) {
72 my $img = pop;
73 $img->sub_rect ($_[0], $_[1], $_[2], $_[3], $_[4])
74 }
75
33 sub resize($$$) { 76 sub resize($$$) {
34 $_[0]->scale ($_[1], $_[2]) 77 my $img = pop;
78 $img->scale ($_[0], $_[1])
35 } 79 }
36 80
81 # TODO: ugly
37 sub move($$$) { 82 sub move($$;$) {
38 # TODO: must be simpler 83 my $img = pop;
39 $_[0]->transform ($_[0]->w, $_[0]->h, $_[1], 84 $img->sub_rect (
85 $_[0], $_[1],
86 $img->w, $img->h,
40 1, 0, -$_[2], 87 $_[2],
41 0, 1, -$_[3],
42 0, 0, 1,
43 ) 88 )
44 } 89 }
45 90
46 sub rotate($$$$) { 91 sub rotate($$$$$$;$) {
47 $_[0]->rotate ($_[0], $_[1], $_[2], $_[3] * (3.14159265 / 180)) 92 my $img = pop;
93 $img->rotate (
94 $_[0],
95 $_[1],
96 $_[2] * $img->w * .01,
97 $_[3] * $img->h * .01,
98 $_[4] * (3.14159265 / 180),
99 $_[5],
100 )
48 } 101 }
49 102
50 sub blur($$$) { 103 sub blur($$$) {
51 my ($img, $rh, $rv) = @_; 104 my ($rh, $rv, $img) = @_;
52 105
53 $img = $img->clone;
54 $img->clone->blur ($rh, $rv); 106 $img->blur ($rh, $rv);
55 $img
56 } 107 }
57 108
58 sub contrast($$;$$;$) { 109 sub contrast($$;$$;$) {
110 my $img = pop;
59 my ($img, $r, $g, $b, $a) = @_; 111 my ($r, $g, $b, $a) = @_;
112
60 ($g, $b) = ($r, $r) if @_ < 4; 113 ($g, $b) = ($r, $r) if @_ < 4;
61 $a = 1 if @_ < 5; 114 $a = 1 if @_ < 5;
115
62 $img = $img->clone; 116 $img = $img->clone;
63 $img->contrast ($r, $g, $b, $a); 117 $img->contrast ($r, $g, $b, $a);
64 $img 118 $img
65 } 119 }
66 120
67 sub brightness($$;$$;$) { 121 sub brightness($$;$$;$) {
122 my $img = pop;
68 my ($img, $r, $g, $b, $a) = @_; 123 my ($r, $g, $b, $a) = @_;
124
69 ($g, $b) = ($r, $r) if @_ < 4; 125 ($g, $b) = ($r, $r) if @_ < 4;
70 $a = 1 if @_ < 5; 126 $a = 1 if @_ < 5;
127
71 $img = $img->clone; 128 $img = $img->clone;
72 $img->brightness ($r, $g, $b, $a); 129 $img->brightness ($r, $g, $b, $a);
73 $img 130 $img
74 } 131 }
75 132
76 sub x() { $new->{position_sensitive} = 1; $x } 133 sub X() { $new->{position_sensitive} = 1; $l }
77 sub y() { $new->{position_sensitive} = 1; $y } 134 sub Y() { $new->{position_sensitive} = 1; $t }
78 sub w() { $new->{size_sensitive} = 1; $w } 135 sub W() { $new->{size_sensitive} = 1; $w }
79 sub h() { $new->{size_sensitive} = 1; $h } 136 sub H() { $new->{size_sensitive} = 1; $h }
137
80 sub now() { urxvt::NOW } 138 sub now() { urxvt::NOW }
81 139
82 sub again($) { 140 sub again($) {
83 $new->{again} = $_[0]; 141 $new->{again} = $_[0];
84 } 142 }
85 143
86 sub counter($) { 144 sub counter($) {
87 $new->{again} = $_[0]; 145 $new->{again} = $_[0];
88 $self->{counter}++ + 0 146 $bgdsl_self->{counter} + 0
89 } 147 }
148
149=back
150
151=cut
152
90} 153}
91 154
92sub parse_expr { 155sub parse_expr {
93 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}";
94 die if $@; 157 die if $@;
… …
97 160
98# compiles a parsed expression 161# compiles a parsed expression
99sub set_expr { 162sub set_expr {
100 my ($self, $expr) = @_; 163 my ($self, $expr) = @_;
101 164
102 local $Data::Dumper::Deparse=1; use Data::Dumper; warn Dumper $expr;#d#
103 $self->{expr} = $expr; 165 $self->{expr} = $expr;
104 $self->recalculate; 166 $self->recalculate;
105} 167}
106 168
107# evaluate the current bg expression 169# evaluate the current bg expression
108sub recalculate { 170sub recalculate {
109 my ($self) = @_; 171 my ($self) = @_;
110 172
173 # rate limit evaluation
174
175 if ($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
185
111 local $urxvt::bgdsl::vars::self = $self; 186 local $bgdsl_self = $self;
112 187
113 local $urxvt::bgdsl::vars::old = $self->{state}; 188 local $old = $self->{state};
114 local $urxvt::bgdsl::vars::new = my $state = $self->{state} = {}; 189 local $new = my $state = $self->{state} = {};
115 190
116 ($urxvt::bgdsl::vars::x, $urxvt::bgdsl::vars::y, $urxvt::bgdsl::vars::w, $urxvt::bgdsl::vars::h) = 191 ($l, $t, $w, $h) =
117 $self->get_geometry; 192 $self->get_geometry;
193
194 # evaluate user expression
118 195
119 my $img = eval { $self->{expr}->() }; 196 my $img = eval { $self->{expr}->() };
120 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
121 201
122 my $repeat; 202 my $repeat;
123 203
124 if (my $again = $state->{again}) { 204 if (my $again = $state->{again}) {
125 $repeat = 1; 205 $repeat = 1;
126 $state->{again} = urxvt::timer->new->after ($again)->cb (sub { $self->recalculate }); 206 $state->{timer} = $again == $old->{again}
207 ? $old->{timer}
208 : urxvt::timer->new->after ($again)->interval ($again)->cb (sub {
209 ++$self->{counter};
210 $self->recalculate
211 });
127 } 212 }
128 213
129 if (delete $state->{position_sensitive}) { 214 if (delete $state->{position_sensitive}) {
130 $repeat = 1; 215 $repeat = 1;
131 $self->enable (position_change => sub { $_[0]->recalculate }); 216 $self->enable (position_change => sub { $_[0]->recalculate });
… …
138 $self->enable (size_change => sub { $_[0]->recalculate }); 223 $self->enable (size_change => sub { $_[0]->recalculate });
139 } else { 224 } else {
140 $self->disable ("size_change"); 225 $self->disable ("size_change");
141 } 226 }
142 227
143 # TODO: install handlers for geometry changes &c 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 }
144 234
145 warn $img; 235 # clear stuff we no longer need
236
237 %$old = ();
238
239 unless ($repeat) {
240 delete $self->{state};
241 delete $self->{expr};
242 }
243
244 # prepare and set background pixmap
245
246 $img = $img->sub_rect (0, 0, $w, $h)
247 if $img->w != $w || $img->h != $h;
248
146 $self->set_background ($img); 249 $self->set_background ($img);
147 $self->scr_recolour (0); 250 $self->scr_recolour (0);
148 $self->want_refresh; 251 $self->want_refresh;
149} 252}
150 253

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