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dd6d43a6 MW |
1 | /* -*-c-*- |
2 | * | |
3 | * Redraw the screen in case it's been trashed somehow | |
4 | * | |
5 | * (c) 2016 Straylight/Edgeware | |
6 | */ | |
7 | ||
8 | /*----- Licensing notice --------------------------------------------------* | |
9 | * | |
10 | * This file is part of the Edgeware X tools collection. | |
11 | * | |
12 | * X tools is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * X tools is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with X tools; if not, write to the Free Software Foundation, | |
24 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | */ | |
26 | ||
27 | /*----- Header files ------------------------------------------------------*/ | |
28 | ||
29 | #include <stdio.h> | |
30 | #include <stdlib.h> | |
31 | #include <string.h> | |
32 | ||
33 | #include <sys/time.h> | |
34 | #include <sys/types.h> | |
35 | #include <unistd.h> | |
36 | ||
37 | #include <X11/Xlib.h> | |
38 | ||
39 | #include <mLib/mdwopt.h> | |
40 | #include <mLib/quis.h> | |
41 | #include <mLib/report.h> | |
42 | ||
43 | /*----- Global variables --------------------------------------------------*/ | |
44 | ||
45 | static Display *dpy; | |
46 | ||
47 | /*----- Main code ---------------------------------------------------------*/ | |
48 | ||
49 | static void version(FILE *fp) | |
50 | { pquis(fp, "$ (xtoys version " VERSION ")\n"); } | |
51 | ||
52 | static void usage(FILE *fp) | |
53 | { pquis(fp, "Usage: $ [-as] [-d display]\n"); } | |
54 | ||
55 | static void help(FILE *fp) | |
56 | { | |
57 | version(fp); | |
58 | fputc('\n', fp); | |
59 | usage(stdout); | |
60 | fputs("\n\ | |
61 | Repaint the X display (or just one screen).\n\ | |
62 | \n\ | |
63 | Options:\n\ | |
64 | \n\ | |
65 | -h, --help Display this help text\n\ | |
66 | -u, --usage Display a short usage summary\n\ | |
67 | -v, --version Display the program's version number\n\ | |
68 | \n\ | |
69 | -a, --all Repaint all of the screens on the display\n\ | |
70 | -d, --display=DISPLAY Choose X display to connect to\n\ | |
71 | -s, --screen Only repaint the selected screen\n", | |
72 | fp); | |
73 | } | |
74 | ||
75 | static void repaint(Screen *sc) | |
76 | { | |
77 | /* Repaint the screen SC. | |
78 | * | |
79 | * Annoyingly, `XClearWindow' uses `ClipByChildren' semantics, and there's | |
80 | * no way to change that. The best idea I can come up with is to drop | |
81 | * another window in front and take it away again. | |
82 | */ | |
83 | ||
84 | Window w; | |
85 | XSetWindowAttributes attr; | |
86 | XEvent ev; | |
87 | ||
88 | attr.background_pixel = 0; | |
89 | attr.event_mask = StructureNotifyMask | VisibilityChangeMask | ExposureMask | KeyPressMask | ButtonPressMask; | |
90 | attr.override_redirect = True; | |
91 | w = XCreateWindow(dpy, RootWindowOfScreen(sc), | |
92 | 0, 0, WidthOfScreen(sc), HeightOfScreen(sc), | |
93 | 0, CopyFromParent, InputOutput, | |
94 | DefaultVisualOfScreen(sc), | |
95 | CWBackPixel | CWEventMask | CWOverrideRedirect, &attr); | |
96 | XMapWindow(dpy, w); | |
97 | do XNextEvent(dpy, &ev); | |
98 | while (ev.type != Expose && ev.type != KeyPress && ev.type != ButtonPress); | |
99 | } | |
100 | ||
101 | int main(int argc, char *argv[]) | |
102 | { | |
103 | const char *display = 0; | |
104 | unsigned f = 0; | |
105 | struct timeval tv; | |
106 | int i; | |
107 | ||
108 | #define f_only 1u | |
109 | #define f_bogus 2u | |
110 | ||
111 | /* Parse command line options. */ | |
112 | ego(argv[0]); | |
113 | for (;;) { | |
114 | static struct option opt[] = { | |
115 | { "help", 0, 0, 'h' }, | |
116 | { "usage", 0, 0, 'u' }, | |
117 | { "version", 0, 0, 'v' }, | |
118 | { "all", 0, 0, 'a' }, | |
119 | { "display", OPTF_ARGREQ, 0, 'd' }, | |
120 | { "screen", 0, 0, 's' }, | |
121 | { 0, 0, 0, 0 } | |
122 | }; | |
123 | int i = getopt_long(argc, argv, "huv" "ad:s", opt, 0); | |
124 | if (i < 0) break; | |
125 | switch (i) { | |
126 | case 'h': help(stdout); exit(0); break; | |
127 | case 'u': usage(stdout); exit(0); break; | |
128 | case 'v': version(stdout); exit(0); break; | |
129 | case 'a': f &= ~f_only; break; | |
130 | case 'd': display = optarg; break; | |
131 | case 's': f |= f_only; break; | |
132 | default: f |= f_bogus; break; | |
133 | } | |
134 | } | |
135 | if (optind < argc) f |= f_bogus; | |
136 | if (f & f_bogus) { usage(stderr); exit(EXIT_FAILURE); } | |
137 | ||
138 | /* Open the display. */ | |
139 | dpy = XOpenDisplay(display); | |
140 | if (!dpy) { die(EXIT_FAILURE, "couldn't open display"); } | |
141 | ||
142 | /* Do the repainting thing. */ | |
143 | if (f & f_only) | |
144 | repaint(DefaultScreenOfDisplay(dpy)); | |
145 | else { | |
146 | for (i = 0; i < ScreenCount(dpy); i++) | |
147 | repaint(ScreenOfDisplay(dpy, i)); | |
148 | } | |
149 | ||
150 | /* Wait for a bit. This is an awful hack. */ | |
151 | tv.tv_sec = 0; tv.tv_usec = 50*1000; | |
152 | select(0, 0, 0, 0, &tv); | |
153 | ||
154 | /* All done. */ | |
155 | return (0); | |
156 | } | |
157 | ||
158 | /*----- That's all, folks -------------------------------------------------*/ |