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Comparing rxvt-unicode/src/perl/background (file contents):
Revision 1.3 by root, Tue Jun 5 12:08:23 2012 UTC vs.
Revision 1.18 by root, Wed Jun 6 15:06:41 2012 UTC

1#! perl 1#! perl
2 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
6
3our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", left, top'; 7our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y';
8$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#$EXPR = 'blur move (root, -x, -y), 5, 5'
6#resize load "/root/pix/das_fette_schwein.jpg", w, h 16#resize load "/root/pix/das_fette_schwein.jpg", w, h
7 17
8use Safe; 18use Safe;
9 19
10our ($bgdsl_self, $old, $new); 20our ($bgdsl_self, $old, $new);
11our ($l, $t, $w, $h); 21our ($l, $t, $w, $h);
12 22
23# enforce at least this interval between updates
24our $MIN_INTERVAL = 1/100;
25
13{ 26{
14 package urxvt::bgdsl; # background language 27 package urxvt::bgdsl; # background language
15 28
16 *repeat_black = \&urxvt::RepeatNone; #TODO wtf 29 *repeat_empty = \&urxvt::RepeatNone;
17 *repeat_wrap = \&urxvt::RepeatNormal; 30 *repeat_tile = \&urxvt::RepeatNormal;
18 *repeat_pad = \&urxvt::RepeatPad; 31 *repeat_pad = \&urxvt::RepeatPad;
19 *repeat_mirror = \&urxvt::RepeatReflect; 32 *repeat_mirror = \&urxvt::RepeatReflect;
20 33
34=head2 PROVIDERS/GENERATORS
35
36=over 4
37
38=item load $path
39
40=cut
41
21 sub load($) { 42 sub load($) {
22 my ($path) = @_; 43 my ($path) = @_;
23 44
24 $new->{load}{$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);
25 } 46 }
26 47
27 sub root() { 48 sub root() {
49 $new->{rootpmap_sensitive} = 1;
28 die "root op not supported, exg, we need you"; 50 die "root op not supported, exg, we need you";
29 } 51 }
30 52
53 sub solid($;$$) {
54 my $img = $bgdsl_self->new_img (urxvt::PictStandardARGB32, $_[1] || 1, $_[2] || 1);
55 $img->fill ($_[0]);
56 $img
57 }
58
59=back
60
61=head2 OPERATORS
62
63=over 4
64
65=cut
66
67# sub clone($) {
68# $_[0]->clone
69# }
70
71 sub clip($$$$$;$) {
72 my $img = pop;
73 $img->sub_rect ($_[0], $_[1], $_[2], $_[3], $_[4])
74 }
75
31 sub resize($$$) { 76 sub resize($$$) {
32 $_[0]->scale ($_[1], $_[2]) 77 my $img = pop;
78 $img->scale ($_[0], $_[1])
33 } 79 }
34 80
81 # TODO: ugly
35 sub move($$$) { 82 sub move($$;$) {
36 # TODO: must be simpler 83 my $img = pop;
37 $_[0]->transform ($_[0]->w, $_[0]->h, $_[1], 84 $img->sub_rect (
85 $_[0], $_[1],
86 $img->w, $img->h,
38 1, 0, -$_[2], 87 $_[2],
39 0, 1, -$_[3],
40 0, 0, 1,
41 ) 88 )
42 } 89 }
43 90
44 sub rotate($$$$) { 91 sub rotate($$$$$$;$) {
45 $_[0]->rotate ($_[0], $_[1], $_[2], $_[3] * (3.14159265 / 180)) 92 my $img = pop;
93 $img->rotate (
94 $_[0],
95 $_[1],
96 $_[2] * $img->w * .01,
97 $_[3] * $img->h * .01,
98 $_[4] * (3.14159265 / 180),
99 $_[5],
100 )
46 } 101 }
47 102
48 sub blur($$$) { 103 sub blur($$$) {
49 my ($img, $rh, $rv) = @_; 104 my ($rh, $rv, $img) = @_;
50 105
51 $img = $img->clone;
52 $img->clone->blur ($rh, $rv); 106 $img->blur ($rh, $rv);
53 $img
54 } 107 }
55 108
56 sub contrast($$;$$;$) { 109 sub contrast($$;$$;$) {
110 my $img = pop;
57 my ($img, $r, $g, $b, $a) = @_; 111 my ($r, $g, $b, $a) = @_;
112
58 ($g, $b) = ($r, $r) if @_ < 4; 113 ($g, $b) = ($r, $r) if @_ < 4;
59 $a = 1 if @_ < 5; 114 $a = 1 if @_ < 5;
115
60 $img = $img->clone; 116 $img = $img->clone;
61 $img->contrast ($r, $g, $b, $a); 117 $img->contrast ($r, $g, $b, $a);
62 $img 118 $img
63 } 119 }
64 120
65 sub brightness($$;$$;$) { 121 sub brightness($$;$$;$) {
122 my $img = pop;
66 my ($img, $r, $g, $b, $a) = @_; 123 my ($r, $g, $b, $a) = @_;
124
67 ($g, $b) = ($r, $r) if @_ < 4; 125 ($g, $b) = ($r, $r) if @_ < 4;
68 $a = 1 if @_ < 5; 126 $a = 1 if @_ < 5;
127
69 $img = $img->clone; 128 $img = $img->clone;
70 $img->brightness ($r, $g, $b, $a); 129 $img->brightness ($r, $g, $b, $a);
71 $img 130 $img
72 } 131 }
73 132
74 sub left () { $new->{position_sensitive} = 1; $l } 133 sub X() { $new->{position_sensitive} = 1; $l }
75 sub top () { $new->{position_sensitive} = 1; $t } 134 sub Y() { $new->{position_sensitive} = 1; $t }
76 sub width () { $new->{size_sensitive} = 1; $w } 135 sub W() { $new->{size_sensitive} = 1; $w }
77 sub height() { $new->{size_sensitive} = 1; $h } 136 sub H() { $new->{size_sensitive} = 1; $h }
78 137
79 sub now() { urxvt::NOW } 138 sub now() { urxvt::NOW }
80 139
81 sub again($) { 140 sub again($) {
82 $new->{again} = $_[0]; 141 $new->{again} = $_[0];
83 } 142 }
84 143
85 sub counter($) { 144 sub counter($) {
86 $new->{again} = $_[0]; 145 $new->{again} = $_[0];
87 $bgdsl_self->{counter}++ + 0 146 $bgdsl_self->{counter} + 0
88 } 147 }
148
149=back
150
151=cut
152
89} 153}
90 154
91sub parse_expr { 155sub parse_expr {
92 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}";
93 die if $@; 157 die if $@;
… …
96 160
97# compiles a parsed expression 161# compiles a parsed expression
98sub set_expr { 162sub set_expr {
99 my ($self, $expr) = @_; 163 my ($self, $expr) = @_;
100 164
101 local $Data::Dumper::Deparse=1; use Data::Dumper; warn Dumper $expr;#d#
102 $self->{expr} = $expr; 165 $self->{expr} = $expr;
103 $self->recalculate; 166 $self->recalculate;
104} 167}
105 168
106# evaluate the current bg expression 169# evaluate the current bg expression
107sub recalculate { 170sub recalculate {
108 my ($self) = @_; 171 my ($self) = @_;
109 172
173 # rate limit evaluation
174
175 if ($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
110 local $bgdsl_self = $self; 186 local $bgdsl_self = $self;
111 187
112 local $old = $self->{state}; 188 local $old = $self->{state};
113 local $new = my $state = $self->{state} = {}; 189 local $new = my $state = $self->{state} = {};
114 190
115 ($l, $t, $w, $h) = 191 ($l, $t, $w, $h) =
116 $self->get_geometry; 192 $self->get_geometry;
117 193
118 warn "$l, $t";#d# 194 # evaluate user expression
119 195
120 my $img = eval { $self->{expr}->() }; 196 my $img = eval { $self->{expr}->() };
121 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
122 201
123 my $repeat; 202 my $repeat;
124 203
125 if (my $again = $state->{again}) { 204 if (my $again = $state->{again}) {
126 $repeat = 1; 205 $repeat = 1;
127 $state->{again} = urxvt::timer->new->after ($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 });
128 } 212 }
129 213
130 if (delete $state->{position_sensitive}) { 214 if (delete $state->{position_sensitive}) {
131 $repeat = 1; 215 $repeat = 1;
132 $self->enable (position_change => sub { $_[0]->recalculate }); 216 $self->enable (position_change => sub { $_[0]->recalculate });
… …
139 $self->enable (size_change => sub { $_[0]->recalculate }); 223 $self->enable (size_change => sub { $_[0]->recalculate });
140 } else { 224 } else {
141 $self->disable ("size_change"); 225 $self->disable ("size_change");
142 } 226 }
143 227
144 # 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 }
145 234
146 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
147 $self->set_background ($img); 249 $self->set_background ($img);
148 $self->scr_recolour (0); 250 $self->scr_recolour (0);
149 $self->want_refresh; 251 $self->want_refresh;
150} 252}
151 253

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