| 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 -------------------------------------------------*/ |