1 | #! perl |
1 | #! perl |
2 | |
2 | |
3 | our $EXPR = 'resize (blur (load "/root/pix/das_fette_schwein.jpg", 1 + (counter 1) % 10, 10), w, h)'; |
3 | #:META:X_RESOURCE:%.expr:string:background expression |
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4 | #:META:X_RESOURCE:%.enable:boolean:some boolean |
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5 | #:META:X_RESOURCE:%.extra.:value:extra config |
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6 | |
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7 | our $EXPR = 'move X, Y, load "MagnoliaAlpha.png"'; |
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8 | #$EXPR = ' |
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9 | # rotate W, H, 50, 50, counter 1/59.95, repeat_mirror, |
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10 | # clip X, Y, W, H, repeat_mirror, |
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11 | # load "/root/pix/das_fette_schwein.jpg" |
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12 | #'; |
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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 | #$EXPR = 'blur move (root, -x, -y), 5, 5' |
6 | #resize load "/root/pix/das_fette_schwein.jpg", w, h |
16 | #resize load "/root/pix/das_fette_schwein.jpg", w, h |
7 | |
17 | |
8 | use Safe; |
18 | use Safe; |
9 | |
19 | |
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20 | our ($bgdsl_self, $old, $new); |
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21 | our ($l, $t, $w, $h); |
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22 | |
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23 | # enforce at least this interval between updates |
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24 | our $MIN_INTERVAL = 1/100; |
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25 | |
10 | { |
26 | { |
11 | package urxvt::bgdsl::vars; |
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12 | |
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13 | our ($self, $old, $new); |
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14 | our ($x, $y, $w, $h); |
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15 | |
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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 | |
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34 | =head2 PROVIDERS/GENERATORS |
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35 | |
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36 | =over 4 |
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37 | |
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38 | =item load $path |
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39 | |
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40 | =cut |
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41 | |
23 | sub load { |
42 | sub load($) { |
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() { |
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49 | $new->{rootpmap_sensitive} = 1; |
30 | die "root op not supported, exg, we need you"; |
50 | die "root op not supported, exg, we need you"; |
31 | } |
51 | } |
32 | |
52 | |
33 | sub resize { |
53 | sub solid($;$$) { |
34 | $_[0]->scale ($_[1], $_[2]) |
54 | my $img = $bgdsl_self->new_img (urxvt::PictStandardARGB32, $_[1] || 1, $_[2] || 1); |
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55 | $img->fill ($_[0]); |
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56 | $img |
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57 | } |
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58 | |
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59 | =back |
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60 | |
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61 | =head2 OPERATORS |
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62 | |
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63 | =over 4 |
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64 | |
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65 | =cut |
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66 | |
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67 | # sub clone($) { |
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68 | # $_[0]->clone |
35 | } |
69 | # } |
36 | |
70 | |
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71 | sub clip($$$$$;$) { |
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72 | my $img = pop; |
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73 | $img->sub_rect ($_[0], $_[1], $_[2], $_[3], $_[4]) |
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74 | } |
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75 | |
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76 | sub resize($$$) { |
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77 | my $img = pop; |
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78 | $img->scale ($_[0], $_[1]) |
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79 | } |
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80 | |
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81 | # TODO: ugly |
37 | sub move { |
82 | sub move($$;$) { |
38 | # TODO: must be simpler |
83 | my $img = pop; |
39 | $_[0]->transform ($_[0]->w, $_[0]->h, $_[1], |
84 | $img->sub_rect ( |
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85 | $_[0], $_[1], |
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86 | $img->w, $img->h, |
40 | 1, 0, -$_[2], |
87 | $_[2], |
41 | 0, 1, -$_[3], |
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42 | 0, 0, 1, |
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43 | ) |
88 | ) |
44 | } |
89 | } |
45 | |
90 | |
46 | sub rotate { |
91 | sub rotate($$$$$$;$) { |
47 | $_[0]->rotate ($_[0], $_[1], $_[2], $_[3] * (3.14159265 / 180)) |
92 | my $img = pop; |
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93 | $img->rotate ( |
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94 | $_[0], |
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95 | $_[1], |
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96 | $_[2] * $img->w * .01, |
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97 | $_[3] * $img->h * .01, |
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98 | $_[4] * (3.14159265 / 180), |
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99 | $_[5], |
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100 | ) |
48 | } |
101 | } |
49 | |
102 | |
50 | sub blur { |
103 | sub blur($$$) { |
51 | my ($img, $rh, $rv) = @_; |
104 | my ($rh, $rv, $img) = @_; |
52 | |
105 | |
53 | $img = $img->clone; |
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54 | $img->clone->blur ($rh, $rv); |
106 | $img->blur ($rh, $rv); |
55 | $img |
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56 | } |
107 | } |
57 | |
108 | |
58 | sub contrast { |
109 | sub contrast($$;$$;$) { |
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110 | my $img = pop; |
59 | my ($img, $r, $g, $b, $a) = @_; |
111 | my ($r, $g, $b, $a) = @_; |
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112 | |
60 | ($g, $b) = ($r, $r) if @_ < 4; |
113 | ($g, $b) = ($r, $r) if @_ < 4; |
61 | $a = 1 if @_ < 5; |
114 | $a = 1 if @_ < 5; |
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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($$;$$;$) { |
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122 | my $img = pop; |
68 | my ($img, $r, $g, $b, $a) = @_; |
123 | my ($r, $g, $b, $a) = @_; |
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124 | |
69 | ($g, $b) = ($r, $r) if @_ < 4; |
125 | ($g, $b) = ($r, $r) if @_ < 4; |
70 | $a = 1 if @_ < 5; |
126 | $a = 1 if @_ < 5; |
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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; $h } |
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137 | |
80 | sub now { urxvt::NOW } |
138 | sub now() { urxvt::NOW } |
81 | |
139 | |
82 | sub again { |
140 | sub again($) { |
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 | } |
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148 | |
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149 | =back |
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150 | |
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151 | =cut |
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152 | |
90 | } |
153 | } |
91 | |
154 | |
92 | sub parse_expr { |
155 | sub 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 $@; |
… | |
… | |
97 | |
160 | |
98 | # compiles a parsed expression |
161 | # compiles a parsed expression |
99 | sub set_expr { |
162 | sub set_expr { |
100 | my ($self, $expr) = @_; |
163 | my ($self, $expr) = @_; |
101 | |
164 | |
102 | local $Data::Dumper::Deparse=1; use Data::Dumper; warn Dumper $expr;#d# |
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103 | $self->{expr} = $expr; |
165 | $self->{expr} = $expr; |
104 | $self->recalculate; |
166 | $self->recalculate; |
105 | } |
167 | } |
106 | |
168 | |
107 | # evaluate the current bg expression |
169 | # evaluate the current bg expression |
108 | sub recalculate { |
170 | sub recalculate { |
109 | my ($self) = @_; |
171 | my ($self) = @_; |
110 | |
172 | |
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173 | # rate limit evaluation |
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174 | |
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175 | if ($self->{next_refresh} > urxvt::NOW) { |
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176 | $self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub { |
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177 | $self->recalculate; |
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178 | }); |
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179 | return; |
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180 | } |
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181 | |
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182 | $self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL; |
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183 | |
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184 | # set environment to evaluate user expression |
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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; |
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193 | |
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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# |
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198 | die if !UNIVERSAL::isa $img, "urxvt::img"; |
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199 | |
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200 | # if the expression is sensitive to external events, prepare reevaluation then |
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201 | |
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202 | my $repeat; |
121 | |
203 | |
122 | if (my $again = $state->{again}) { |
204 | if (my $again = $state->{again}) { |
123 | warn $again;#d# |
205 | $repeat = 1; |
124 | $state->{again} = urxvt::timer->new->after ($again)->cb (sub { $self->recalculate }); |
206 | $state->{timer} = $again == $old->{again} |
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207 | ? $old->{timer} |
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208 | : urxvt::timer->new->after ($again)->interval ($again)->cb (sub { |
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209 | ++$self->{counter}; |
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210 | $self->recalculate |
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211 | }); |
125 | } |
212 | } |
126 | |
213 | |
127 | # TODO: install handlers for geometry changes &c |
214 | if (delete $state->{position_sensitive}) { |
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215 | $repeat = 1; |
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216 | $self->enable (position_change => sub { $_[0]->recalculate }); |
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217 | } else { |
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218 | $self->disable ("position_change"); |
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219 | } |
128 | |
220 | |
129 | warn $img; |
221 | if (delete $state->{size_sensitive}) { |
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222 | $repeat = 1; |
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223 | $self->enable (size_change => sub { $_[0]->recalculate }); |
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224 | } else { |
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225 | $self->disable ("size_change"); |
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226 | } |
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227 | |
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228 | if (delete $state->{rootpmap_sensitive}) { |
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229 | $repeat = 1; |
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230 | $self->enable (rootpmap_change => sub { $_[0]->recalculate }); |
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231 | } else { |
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232 | $self->disable ("rootpmap_change"); |
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233 | } |
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234 | |
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235 | # clear stuff we no longer need |
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236 | |
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237 | %$old = (); |
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238 | |
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239 | unless ($repeat) { |
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240 | delete $self->{state}; |
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241 | delete $self->{expr}; |
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242 | } |
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243 | |
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244 | # prepare and set background pixmap |
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245 | |
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246 | $img = $img->sub_rect (0, 0, $w, $h) |
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247 | if $img->w != $w || $img->h != $h; |
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248 | |
130 | $self->set_background ($img); |
249 | $self->set_background ($img); |
131 | $self->scr_recolour (0); |
250 | $self->scr_recolour (0); |
132 | $self->want_refresh; |
251 | $self->want_refresh; |
133 | } |
252 | } |
134 | |
253 | |