src/wlt_main.c

   1 /*
   2  * wlt - Wayland Terminal
   3  *
   4  * Copyright (c) 2012 David Herrmann <dh.herrmann@googlemail.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining
   7  * a copy of this software and associated documentation files
   8  * (the "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sublicense, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  21  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /*
  27  * Wayland Terminal main application
  28  */
  29
  30 #include <errno.h>
  31 #include <paths.h>
  32 #include <signal.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <sys/signalfd.h>
  37 #include <wayland-client.h>
  38 #include "conf.h"
  39 #include "eloop.h"
  40 #include "log.h"
  41 #include "shl_misc.h"
  42 #include "text.h"
  43 #include "wlt_main.h"
  44 #include "wlt_terminal.h"
  45 #include "wlt_theme.h"
  46 #include "wlt_toolkit.h"
  47
  48 #define LOG_SUBSYSTEM "wlt"
  49
  50 struct wlt_app {
  51         struct ev_eloop *eloop;
  52         struct wlt_display *disp;
  53         struct wlt_window *wnd;
  54 };
  55
  56 static void sig_generic(struct ev_eloop *eloop, struct signalfd_siginfo *info,
  57                         void *data)
  58 {
  59         struct wlt_app *app = data;
  60
  61         ev_eloop_exit(app->eloop);
  62         log_info("terminating due to caught signal %d", info->ssi_signo);
  63 }
  64
  65 static void window_close(struct wlt_window *wnd, void *data)
  66 {
  67         struct wlt_app *app = data;
  68
  69         log_info("closing window");
  70         ev_eloop_exit(app->eloop);
  71 }
  72
  73 static void terminal_close(struct wlt_terminal *term, unsigned int event,
  74                            void *data)
  75 {
  76         struct wlt_app *app = data;
  77
  78         if (event == WLT_TERMINAL_HUP) {
  79                 log_info("closing pty");
  80                 ev_eloop_exit(app->eloop);
  81         }
  82 }
  83
  84 static int window_init(struct wlt_app *app)
  85 {
  86         int ret;
  87         struct wlt_theme *theme;
  88         struct wlt_terminal *term;
  89
  90         ret = wlt_display_create_window(app->disp, &app->wnd,
  91                                         600, 400, app);
  92         if (ret) {
  93                 log_error("cannot create wayland window");
  94                 return ret;
  95         }
  96         wlt_window_set_close_cb(app->wnd, window_close);
  97
  98         ret = wlt_theme_new(&theme, app->wnd);
  99         if (ret) {
 100                 log_error("cannot create theme");
 101                 return ret;
 102         }
 103
 104         ret = wlt_terminal_new(&term, app->wnd);
 105         if (ret) {
 106                 log_error("cannot create terminal");
 107                 return ret;
 108         }
 109
 110         ret = wlt_terminal_open(term, terminal_close, app);
 111         if (ret) {
 112                 log_error("cannot open terminal");
 113                 return ret;
 114         }
 115
 116         return 0;
 117 }
 118
 119 static void display_event(struct wlt_display *disp, unsigned int event,
 120                           void *data)
 121 {
 122         struct wlt_app *app = data;
 123         int ret;
 124
 125         switch (event) {
 126         case WLT_DISPLAY_READY:
 127                 log_info("wayland display initialized");
 128                 ret = window_init(app);
 129                 if (ret)
 130                         ev_eloop_exit(app->eloop);
 131                 break;
 132         case WLT_DISPLAY_HUP:
 133                 log_info("wayland display connection lost");
 134                 ev_eloop_exit(app->eloop);
 135                 break;
 136         }
 137 }
 138
 139 static void destroy_app(struct wlt_app *app)
 140 {
 141         wlt_window_unref(app->wnd);
 142         wlt_display_unregister_cb(app->disp, display_event, app);
 143         wlt_display_unref(app->disp);
 144         ev_eloop_unregister_signal_cb(app->eloop, SIGINT, sig_generic, app);
 145         ev_eloop_unregister_signal_cb(app->eloop, SIGTERM, sig_generic, app);
 146         ev_eloop_unref(app->eloop);
 147 }
 148
 149 static int setup_app(struct wlt_app *app)
 150 {
 151         int ret;
 152
 153         ret = ev_eloop_new(&app->eloop, log_llog);
 154         if (ret)
 155                 goto err_app;
 156
 157         ret = ev_eloop_register_signal_cb(app->eloop, SIGTERM,
 158                                                 sig_generic, app);
 159         if (ret)
 160                 goto err_app;
 161
 162         ret = ev_eloop_register_signal_cb(app->eloop, SIGINT,
 163                                                 sig_generic, app);
 164         if (ret)
 165                 goto err_app;
 166
 167         ret = wlt_display_new(&app->disp, app->eloop);
 168         if (ret)
 169                 goto err_app;
 170
 171         ret = wlt_display_register_cb(app->disp, display_event, app);
 172         if (ret)
 173                 goto err_app;
 174
 175         return 0;
 176
 177 err_app:
 178         destroy_app(app);
 179         return ret;
 180 }
 181
 182 struct wlt_conf_t wlt_conf;
 183
 184 static void print_help()
 185 {
 186         /*
 187          * Usage/Help information
 188          * This should be scaled to a maximum of 80 characters per line:
 189          *
 190          * 80 char line:
 191          *       |   10   |    20   |    30   |    40   |    50   |    60   |    70   |    80   |
 192          *      "12345678901234567890123456789012345678901234567890123456789012345678901234567890\n"
 193          * 80 char line starting with tab:
 194          *       |10|    20   |    30   |    40   |    50   |    60   |    70   |    80   |
 195          *      "\t901234567890123456789012345678901234567890123456789012345678901234567890\n"
 196          */
 197         fprintf(stderr,
 198                 "Usage:\n"
 199                 "\t%1$s [options]\n"
 200                 "\t%1$s -h [options]\n"
 201                 "\t%1$s -l [options] -- /bin/sh [sh-arguments]\n"
 202                 "\n"
 203                 "You can prefix boolean options with \"no-\" to negate it. If an argument is\n"
 204                 "given multiple times, only the last argument matters if not otherwise stated.\n"
 205                 "\n"
 206                 "General Options:\n"
 207                 "\t-h, --help                  [off]   Print this help and exit\n"
 208                 "\t-v, --verbose               [off]   Print verbose messages\n"
 209                 "\t    --debug                 [off]   Enable debug mode\n"
 210                 "\t    --silent                [off]   Suppress notices and warnings\n"
 211                 "\n"
 212                 "Terminal Options:\n"
 213                 "\t-l, --login                 [/bin/sh]\n"
 214                 "\t                              Start the given login process instead\n"
 215                 "\t                              of the default process; all arguments\n"
 216                 "\t                              following '--' will be be parsed as\n"
 217                 "\t                              argv to this process. No more options\n"
 218                 "\t                              after '--' will be parsed so use it at\n"
 219                 "\t                              the end of the argument string\n"
 220                 "\t-t, --term <TERM>           [xterm-256color]\n"
 221                 "\t                              Value of the TERM environment variable\n"
 222                 "\t                              for the child process\n"
 223                 "\t    --palette <name>        [default]\n"
 224                 "\t                              Select the used color palette\n"
 225                 "\t    --sb-size <num>         [1000]\n"
 226                 "\t                              Size of the scrollback-buffer in lines\n"
 227                 "\n"
 228                 "Keyboard Shortcuts and Grabs:\n"
 229                 "\t    --grab-scroll-up <grab>   [<Shift>Up]\n"
 230                 "\t                                Shortcut to scroll up\n"
 231                 "\t    --grab-scroll-down <grab> [<Shift>Down]\n"
 232                 "\t                                Shortcut to scroll down\n"
 233                 "\t    --grab-page-up <grab>     [<Shift>Prior]\n"
 234                 "\t                                Shortcut to scroll page up\n"
 235                 "\t    --grab-page-down <grab>   [<Shift>Next]\n"
 236                 "\t                                Shortcut to scroll page down\n"
 237                 "Font Options:\n"
 238                 "\t    --font-engine <engine>  [pango]\n"
 239                 "\t                              Font engine\n"
 240                 "\t    --font-size <points>    [15]\n"
 241                 "\t                              Font size in points\n"
 242                 "\t    --font-name <name>      [monospace]\n"
 243                 "\t                              Font name\n"
 244                 "\t    --font-dpi <dpi>        [96]\n"
 245                 "\t                              Force DPI value for all fonts\n",
 246                 "wlterm");
 247         /*
 248          * 80 char line:
 249          *       |   10   |    20   |    30   |    40   |    50   |    60   |    70   |    80   |
 250          *      "12345678901234567890123456789012345678901234567890123456789012345678901234567890\n"
 251          * 80 char line starting with tab:
 252          *       |10|    20   |    30   |    40   |    50   |    60   |    70   |    80   |
 253          *      "\t901234567890123456789012345678901234567890123456789012345678901234567890\n"
 254          */
 255 }
 256
 257 static int aftercheck_debug(struct conf_option *opt, int argc, char **argv,
 258                             int idx)
 259 {
 260         /* --debug implies --verbose */
 261         if (wlt_conf.debug)
 262                 wlt_conf.verbose = 1;
 263
 264         return 0;
 265 }
 266
 267 static int aftercheck_help(struct conf_option *opt, int argc, char **argv,
 268                            int idx)
 269 {
 270         /* exit after printing --help information */
 271         if (wlt_conf.help) {
 272                 print_help();
 273                 wlt_conf.exit = true;
 274         }
 275
 276         return 0;
 277 }
 278
 279 static char *def_argv[] = { NULL, "-i", NULL };
 280
 281 static int aftercheck_login(struct conf_option *opt, int argc, char **argv,
 282                             int idx)
 283 {
 284         int ret;
 285
 286         /* parse "--login [...] -- args" arguments */
 287         if (wlt_conf.login) {
 288                 if (idx >= argc) {
 289                         fprintf(stderr, "Arguments for --login missing\n");
 290                         return -EFAULT;
 291                 }
 292
 293                 wlt_conf.argv = &argv[idx];
 294                 ret = argc - idx;
 295         } else {
 296                 def_argv[0] = getenv("SHELL") ? : _PATH_BSHELL;
 297                 wlt_conf.argv = def_argv;
 298                 ret = 0;
 299         }
 300
 301         return ret;
 302 }
 303
 304 static struct conf_grab def_grab_scroll_up = {
 305         .mods = SHL_SHIFT_MASK,
 306         .keysym = XKB_KEY_Up,
 307 };
 308
 309 static struct conf_grab def_grab_scroll_down = {
 310         .mods = SHL_SHIFT_MASK,
 311         .keysym = XKB_KEY_Down,
 312 };
 313
 314 static struct conf_grab def_grab_page_up = {
 315         .mods = SHL_SHIFT_MASK,
 316         .keysym = XKB_KEY_Prior,
 317 };
 318
 319 static struct conf_grab def_grab_page_down = {
 320         .mods = SHL_SHIFT_MASK,
 321         .keysym = XKB_KEY_Next,
 322 };
 323
 324 struct conf_option options[] = {
 325         CONF_OPTION_BOOL('h', "help", aftercheck_help, &wlt_conf.help, false),
 326         CONF_OPTION_BOOL('v', "verbose", NULL, &wlt_conf.verbose, false),
 327         CONF_OPTION_BOOL(0, "debug", aftercheck_debug, &wlt_conf.debug, false),
 328         CONF_OPTION_BOOL(0, "silent", NULL, &wlt_conf.silent, false),
 329
 330         CONF_OPTION_BOOL('l', "login", aftercheck_login, &wlt_conf.login, false),
 331         CONF_OPTION_STRING('t', "term", NULL, &wlt_conf.term, "xterm-256color"),
 332         CONF_OPTION_STRING(0, "palette", NULL, &wlt_conf.palette, NULL),
 333         CONF_OPTION_UINT(0, "sb-size", NULL, &wlt_conf.sb_size, 1000),
 334
 335         CONF_OPTION_GRAB(0, "grab-scroll-up", NULL, &wlt_conf.grab_scroll_up, &def_grab_scroll_up),
 336         CONF_OPTION_GRAB(0, "grab-scroll-down", NULL, &wlt_conf.grab_scroll_down, &def_grab_scroll_down),
 337         CONF_OPTION_GRAB(0, "grab-page-up", NULL, &wlt_conf.grab_page_up, &def_grab_page_up),
 338         CONF_OPTION_GRAB(0, "grab-page-down", NULL, &wlt_conf.grab_page_down, &def_grab_page_down),
 339
 340         CONF_OPTION_STRING(0, "font-engine", NULL, &wlt_conf.font_engine, "pango"),
 341         CONF_OPTION_UINT(0, "font-size", NULL, &wlt_conf.font_size, 12),
 342         CONF_OPTION_STRING(0, "font-name", NULL, &wlt_conf.font_name, "monospace"),
 343         CONF_OPTION_UINT(0, "font-dpi", NULL, &wlt_conf.font_ppi, 96),
 344 };
 345
 346 int main(int argc, char **argv)
 347 {
 348         int ret;
 349         struct wlt_app app;
 350         size_t onum;
 351
 352         onum = sizeof(options) / sizeof(*options);
 353         ret = conf_parse_argv(options, onum, argc, argv);
 354         if (ret)
 355                 goto err_out;
 356
 357         if (wlt_conf.exit) {
 358                 conf_free(options, onum);
 359                 return EXIT_SUCCESS;
 360         }
 361
 362         if (!wlt_conf.debug && !wlt_conf.verbose && wlt_conf.silent)
 363                 log_set_config(&LOG_CONFIG_WARNING(0, 0, 0, 0));
 364         else
 365                 log_set_config(&LOG_CONFIG_INFO(wlt_conf.debug,
 366                                                 wlt_conf.verbose));
 367
 368         log_print_init("wlterm");
 369
 370         kmscon_font_load_all();
 371
 372         memset(&app, 0, sizeof(app));
 373         ret = setup_app(&app);
 374         if (ret)
 375                 goto err_unload;
 376
 377         ev_eloop_run(app.eloop, -1);
 378
 379         destroy_app(&app);
 380         kmscon_font_unload_all();
 381         conf_free(options, onum);
 382         log_info("exiting");
 383
 384         return EXIT_SUCCESS;
 385
 386 err_unload:
 387         kmscon_font_unload_all();
 388 err_out:
 389         conf_free(options, onum);
 390         log_err("cannot initialize wlterm, errno %d: %s", ret, strerror(-ret));
 391         return -ret;
 392 }