qemu-keymap.c (7588B)
1 /* 2 * QEMU keymap utility 3 * 4 * Copyright Red Hat, Inc. 2017 5 * 6 * Authors: 7 * Gerd Hoffmann <kraxel@redhat.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2 or later. 10 * See the COPYING file in the top-level directory. 11 */ 12 #include "qemu/osdep.h" 13 #include "qemu/notify.h" 14 #include "ui/input.h" 15 16 #include <xkbcommon/xkbcommon.h> 17 18 struct xkb_rule_names names = { 19 .rules = NULL, 20 .model = "pc105", 21 .layout = "us", 22 .variant = NULL, 23 .options = NULL, 24 }; 25 26 static xkb_mod_mask_t shift; 27 static xkb_mod_mask_t ctrl; 28 static xkb_mod_mask_t altgr; 29 static xkb_mod_mask_t numlock; 30 31 static FILE *outfile; 32 33 /* ------------------------------------------------------------------------ */ 34 35 static uint32_t qcode_to_number(uint32_t qcode) 36 { 37 KeyValue keyvalue; 38 uint32_t number; 39 40 keyvalue.type = KEY_VALUE_KIND_QCODE; 41 keyvalue.u.qcode.data = qcode; 42 number = qemu_input_key_value_to_number(&keyvalue); 43 assert(number != 0); 44 return number; 45 } 46 47 static void print_sym(xkb_keysym_t sym, uint32_t qcode, const char *mod) 48 { 49 char name[64]; 50 51 if (sym == XKB_KEY_NoSymbol) { 52 return; 53 } 54 xkb_keysym_get_name(sym, name, sizeof(name)); 55 56 /* TODO: make ui/keymap.c parser accept QKeyCode names */ 57 fprintf(outfile, "%s 0x%02x%s\n", name, qcode_to_number(qcode), mod); 58 } 59 60 static void walk_map(struct xkb_keymap *map, xkb_keycode_t code, void *data) 61 { 62 struct xkb_state *state = data; 63 xkb_keysym_t kbase, knumlock, kshift, kaltgr, kaltgrshift; 64 uint32_t evdev, qcode; 65 char name[64]; 66 67 fprintf(outfile, "\n"); 68 69 /* 70 * map xkb keycode -> QKeyCode 71 * 72 * xkb keycode is linux evdev shifted by 8 73 */ 74 evdev = code - 8; 75 qcode = qemu_input_linux_to_qcode(evdev); 76 if (qcode == Q_KEY_CODE_UNMAPPED) { 77 xkb_state_update_mask(state, 0, 0, 0, 0, 0, 0); 78 kbase = xkb_state_key_get_one_sym(state, code); 79 xkb_keysym_get_name(kbase, name, sizeof(name)); 80 fprintf(outfile, "# evdev %d (0x%x): no evdev -> QKeyCode mapping" 81 " (xkb keysym %s)\n", evdev, evdev, name); 82 return; 83 } 84 fprintf(outfile, "# evdev %d (0x%x), QKeyCode \"%s\", number 0x%x\n", 85 evdev, evdev, 86 QKeyCode_str(qcode), 87 qcode_to_number(qcode)); 88 89 /* 90 * check which modifier states generate which keysyms 91 */ 92 xkb_state_update_mask(state, 0, 0, 0, 0, 0, 0); 93 kbase = xkb_state_key_get_one_sym(state, code); 94 print_sym(kbase, qcode, ""); 95 96 xkb_state_update_mask(state, 0, 0, numlock, 0, 0, 0); 97 knumlock = xkb_state_key_get_one_sym(state, code); 98 if (kbase != knumlock) { 99 print_sym(knumlock, qcode, " numlock"); 100 } 101 102 xkb_state_update_mask(state, shift, 0, 0, 0, 0, 0); 103 kshift = xkb_state_key_get_one_sym(state, code); 104 if (kbase != kshift && knumlock != kshift) { 105 print_sym(kshift, qcode, " shift"); 106 } 107 108 xkb_state_update_mask(state, altgr, 0, 0, 0, 0, 0); 109 kaltgr = xkb_state_key_get_one_sym(state, code); 110 if (kbase != kaltgr) { 111 print_sym(kaltgr, qcode, " altgr"); 112 } 113 114 xkb_state_update_mask(state, altgr | shift, 0, 0, 0, 0, 0); 115 kaltgrshift = xkb_state_key_get_one_sym(state, code); 116 if (kshift != kaltgrshift && kaltgr != kaltgrshift) { 117 print_sym(kaltgrshift, qcode, " shift altgr"); 118 } 119 return; 120 } 121 122 static void usage(FILE *out) 123 { 124 fprintf(out, 125 "\n" 126 "This tool generates qemu reverse keymaps from xkb keymaps,\n" 127 "which can be used with the qemu \"-k\" command line switch.\n" 128 "\n" 129 "usage: qemu-keymap <options>\n" 130 "options:\n" 131 " -h print this text\n" 132 " -f <file> set output file (default: stdout)\n" 133 " -m <model> set kbd model (default: %s)\n" 134 " -l <layout> set kbd layout (default: %s)\n" 135 " -v <variant> set kbd variant (default: %s)\n" 136 " -o <options> set kbd options (default: %s)\n" 137 "\n", 138 names.model, names.layout, 139 names.variant ?: "-", 140 names.options ?: "-"); 141 } 142 143 int main(int argc, char *argv[]) 144 { 145 struct xkb_context *ctx; 146 struct xkb_keymap *map; 147 struct xkb_state *state; 148 xkb_mod_index_t mod, mods; 149 int rc; 150 151 for (;;) { 152 rc = getopt(argc, argv, "hm:l:v:o:f:"); 153 if (rc == -1) { 154 break; 155 } 156 switch (rc) { 157 case 'm': 158 names.model = optarg; 159 break; 160 case 'l': 161 names.layout = optarg; 162 break; 163 case 'v': 164 names.variant = optarg; 165 break; 166 case 'o': 167 names.options = optarg; 168 break; 169 case 'f': 170 outfile = fopen(optarg, "w"); 171 if (outfile == NULL) { 172 fprintf(stderr, "open %s: %s\n", optarg, strerror(errno)); 173 exit(1); 174 } 175 break; 176 case 'h': 177 usage(stdout); 178 exit(0); 179 default: 180 usage(stderr); 181 exit(1); 182 } 183 } 184 185 if (outfile == NULL) { 186 outfile = stdout; 187 } 188 189 fprintf(outfile, 190 "# SPDX-License-Identifier: GPL-2.0-or-later\n" 191 "#\n" 192 "# generated by qemu-keymap\n" 193 "# model : %s\n" 194 "# layout : %s\n" 195 "# variant : %s\n" 196 "# options : %s\n" 197 "\n", 198 names.model, names.layout, 199 names.variant ?: "-", 200 names.options ?: "-"); 201 202 ctx = xkb_context_new(XKB_CONTEXT_NO_FLAGS); 203 map = xkb_keymap_new_from_names(ctx, &names, XKB_KEYMAP_COMPILE_NO_FLAGS); 204 if (!map) { 205 /* libxkbcommon prints error */ 206 exit(1); 207 } 208 209 fprintf(outfile, "# name: \"%s\"\n\n", 210 xkb_keymap_layout_get_name(map, 0)); 211 fprintf(outfile, "# modifiers\n"); 212 mods = xkb_keymap_num_mods(map); 213 for (mod = 0; mod < mods; mod++) { 214 fprintf(outfile, "# %2d: %s\n", 215 mod, xkb_keymap_mod_get_name(map, mod)); 216 } 217 218 mod = xkb_keymap_mod_get_index(map, "Shift"); 219 shift = (1 << mod); 220 mod = xkb_keymap_mod_get_index(map, "Control"); 221 ctrl = (1 << mod); 222 mod = xkb_keymap_mod_get_index(map, "AltGr"); 223 altgr = (1 << mod); 224 mod = xkb_keymap_mod_get_index(map, "NumLock"); 225 numlock = (1 << mod); 226 227 state = xkb_state_new(map); 228 xkb_keymap_key_for_each(map, walk_map, state); 229 230 /* add quirks */ 231 fprintf(outfile, 232 "\n" 233 "#\n" 234 "# quirks section start\n" 235 "#\n" 236 "# Sometimes multiple keysyms map to the same keycodes.\n" 237 "# The keycode -> keysym lookup finds only one of the\n" 238 "# keysyms. So append them here.\n" 239 "#\n" 240 "\n"); 241 print_sym(XKB_KEY_Print, Q_KEY_CODE_SYSRQ, ""); 242 print_sym(XKB_KEY_Sys_Req, Q_KEY_CODE_SYSRQ, ""); 243 print_sym(XKB_KEY_Execute, Q_KEY_CODE_SYSRQ, ""); 244 245 print_sym(XKB_KEY_KP_Decimal, Q_KEY_CODE_KP_DECIMAL, " numlock"); 246 print_sym(XKB_KEY_KP_Separator, Q_KEY_CODE_KP_DECIMAL, " numlock"); 247 248 print_sym(XKB_KEY_Alt_R, Q_KEY_CODE_ALT_R, ""); 249 print_sym(XKB_KEY_ISO_Level3_Shift, Q_KEY_CODE_ALT_R, ""); 250 print_sym(XKB_KEY_Mode_switch, Q_KEY_CODE_ALT_R, ""); 251 252 fprintf(outfile, 253 "\n" 254 "# quirks section end\n"); 255 256 exit(0); 257 }