config: add 'startup-mode' option

This option controls the initial window mode: windowed, maximized or
fullscreen. The default is windowed.

CHANGELOG.md

@@ -12,6 +12,8 @@
 
 * User configurable key- and mouse bindings. See `man 5 foot` and the
   example `footrc` (https://codeberg.org/dnkl/foot/issues/1)
+* **startup-mode** option to `footrc`, that lets you control the
+  initial window mode: _windowed_, _maximized_ or _fullscreen_.
 
 
 ### Changed

config.c

@@ -225,7 +225,7 @@ parse_section_main(const char *key, const char *value, struct config *conf,
         unsigned x, y;
         if (sscanf(value, "%ux%u", &x, &y) != 2) {
             LOG_ERR(
-                "%s: %d: expected PAD_XxPAD_Y, where both are positive integers: %s",
+                "%s:%d: expected PAD_XxPAD_Y, where both are positive integers: %s",
                 path, lineno, value);
             return false;
         }
@@ -234,6 +234,21 @@ parse_section_main(const char *key, const char *value, struct config *conf,
         conf->pad_y = y;
     }
 
+    else if (strcmp(key, "startup-mode") == 0) {
+        if (strcmp(value, "windowed") == 0)
+            conf->startup_mode = STARTUP_WINDOWED;
+        else if (strcmp(value, "maximized") == 0)
+            conf->startup_mode = STARTUP_MAXIMIZED;
+        else if (strcmp(value, "fullscreen") == 0)
+            conf->startup_mode = STARTUP_FULLSCREEN;
+        else {
+            LOG_ERR(
+                "%s:%d: expected either 'windowed', 'maximized' or 'fullscreen'",
+                path, lineno);
+            return false;
+        }
+    }
+
     else if (strcmp(key, "font") == 0) {
         char *copy = strdup(value);
         for (const char *font = strtok(copy, ","); font != NULL; font = strtok(NULL, ",")) {
@@ -803,6 +818,7 @@ config_load(struct config *conf, const char *conf_path)
         .height = 500,
         .pad_x = 2,
         .pad_y = 2,
+        .startup_mode = STARTUP_WINDOWED,
         .fonts = tll_init(),
         .scrollback_lines = 1000,
 

config.h

@@ -15,6 +15,7 @@ struct config {
     unsigned height;
     unsigned pad_x;
     unsigned pad_y;
+    enum { STARTUP_WINDOWED, STARTUP_MAXIMIZED, STARTUP_FULLSCREEN } startup_mode;
 
     tll(char *) fonts;
 

doc/foot.5.scd

@@ -40,6 +40,10 @@ in this order:
 	Padding between border and glyphs, in pixels, on the form
 	_XxY_ (-padding). Default: _2x2_.
 
+*startup-mode*
+	Initial window mode: *windowed*, *maximized* or
+	*fullscreen*. Default: _windowed_.
+
 *shell*
 	Executable to launch. Typically a shell. Default: _$SHELL_ if set,
 	otherwise the user's default shell (as specified in

footrc

@@ -4,6 +4,7 @@
 # scrollback=1000
 # geometry=700x500
 # pad=2x2
+# startup-mode=windowed
 # shell=$SHELL (if set, otherwise user's default shell from /etc/passwd)
 # term=foot
 # login-shell=no

terminal.c

@@ -13,6 +13,7 @@
 #include <sys/timerfd.h>
 #include <fcntl.h>
 #include <linux/input-event-codes.h>
+#include <xdg-shell.h>
 
 #define LOG_MODULE "terminal"
 #define LOG_ENABLE_DBG 0
@@ -800,6 +801,19 @@ term_init(const struct config *conf, struct fdm *fdm, struct wayland *wayl,
     /* Let the Wayland backend know we exist */
     tll_push_back(wayl->terms, term);
 
+    switch (conf->startup_mode) {
+    case STARTUP_WINDOWED:
+        break;
+
+    case STARTUP_MAXIMIZED:
+        xdg_toplevel_set_maximized(term->window->xdg_toplevel);
+        break;
+
+    case STARTUP_FULLSCREEN:
+        xdg_toplevel_set_fullscreen(term->window->xdg_toplevel, NULL);
+        break;
+    }
+
     /* Start the slave/client */
     if ((term->slave = slave_spawn(term->ptmx, argc, term->cwd, argv, term_env, conf->shell, login_shell)) == -1)
         goto err;