Fix scan_xrandr to fallback when a scan results in no new regions.

[spectrwm] / spectrwm.c

diff --git a/spectrwm.c b/spectrwm.c
index 594fe5de01025761ec781f278141dcde2a9f6f43..893d5208003d825ba5ac3986a1405036b755325c 100644 (file)
--- a/spectrwm.c
+++ b/spectrwm.c
@@ -703,7 +703,7 @@ struct cursors {
 void    buttonpress(xcb_button_press_event_t *);
 void    check_conn(void);
 void    clientmessage(xcb_client_message_event_t *);
-int     conf_load(char *, int);
+int     conf_load(const char *, int);
 void    configurenotify(xcb_configure_notify_event_t *);
 void    configurerequest(xcb_configure_request_event_t *);
 void    constrain_window(struct ws_win *, struct swm_region *, int);
@@ -712,7 +712,7 @@ void         enternotify(xcb_enter_notify_event_t *);
 void    event_drain(uint8_t);
 void    event_error(xcb_generic_error_t *);
 void    event_handle(xcb_generic_event_t *);
-char   *expand_tilde(char *);
+char   *expand_tilde(const char *);
 void    expose(xcb_expose_event_t *);
 struct ws_win  *find_window(xcb_window_t);
 int     floating_toggle_win(struct ws_win *);
@@ -749,7 +749,7 @@ void         maprequest(xcb_map_request_event_t *);
 void    new_region(struct swm_screen *, int, int, int, int);
 int     parse_rgb(const char *, uint16_t *, uint16_t *, uint16_t *);
 void    propertynotify(xcb_property_notify_event_t *);
-void    spawn_select(struct swm_region *, union arg *, char *, int *);
+void    spawn_select(struct swm_region *, union arg *, const char *, int *);
 void    screenchange(xcb_randr_screen_change_notify_event_t *);
 void    shutdown_cleanup(void);
 void    store_float_geom(struct ws_win *, struct swm_region *);
@@ -799,7 +799,7 @@ cursors_cleanup(void)
 }
 
 char *
-expand_tilde(char *s)
+expand_tilde(const char *s)
 {
        struct passwd           *ppwd;
        int                     i, max;
@@ -2051,7 +2051,7 @@ isxlfd(char *s)
 }
 
 void
-fontset_init()
+fontset_init(void)
 {
        char                    *default_string;
        char                    **missing_charsets;
@@ -4239,7 +4239,7 @@ get_win_name(xcb_window_t win)
                    xcb_get_property_value_length(r));
 
        free(r);
-       return name;
+       return (name);
 }
 
 void
@@ -4464,7 +4464,7 @@ search_win(struct swm_region *r, union arg *args)
 }
 
 void
-search_resp_uniconify(char *resp, unsigned long len)
+search_resp_uniconify(const char *resp, unsigned long len)
 {
        char                    *name;
        struct ws_win           *win;
@@ -4494,7 +4494,7 @@ search_resp_uniconify(char *resp, unsigned long len)
 }
 
 void
-search_resp_name_workspace(char *resp, unsigned long len)
+search_resp_name_workspace(const char *resp, unsigned long len)
 {
        struct workspace        *ws;
 
@@ -4520,7 +4520,7 @@ search_resp_name_workspace(char *resp, unsigned long len)
 }
 
 void
-search_resp_search_workspace(char *resp)
+search_resp_search_workspace(const char *resp)
 {
        char                    *p, *q;
        int                     ws_idx;
@@ -4551,7 +4551,7 @@ search_resp_search_workspace(char *resp)
 }
 
 void
-search_resp_search_window(char *resp)
+search_resp_search_window(const char *resp)
 {
        char                    *s;
        int                     idx;
@@ -5372,7 +5372,7 @@ TAILQ_HEAD(spawn_list, spawn_prog);
 struct spawn_list              spawns = TAILQ_HEAD_INITIALIZER(spawns);
 
 int
-spawn_expand(struct swm_region *r, union arg *args, char *spawn_name,
+spawn_expand(struct swm_region *r, union arg *args, const char *spawn_name,
     char ***ret_args)
 {
        struct spawn_prog       *prog = NULL;
@@ -5451,7 +5451,7 @@ spawn_expand(struct swm_region *r, union arg *args, char *spawn_name,
 }
 
 void
-spawn_custom(struct swm_region *r, union arg *args, char *spawn_name)
+spawn_custom(struct swm_region *r, union arg *args, const char *spawn_name)
 {
        union arg               a;
        char                    **real_args;
@@ -5469,7 +5469,8 @@ spawn_custom(struct swm_region *r, union arg *args, char *spawn_name)
 }
 
 void
-spawn_select(struct swm_region *r, union arg *args, char *spawn_name, int *pid)
+spawn_select(struct swm_region *r, union arg *args, const char *spawn_name,
+    int *pid)
 {
        union arg               a;
        char                    **real_args;
@@ -5511,7 +5512,7 @@ spawn_select(struct swm_region *r, union arg *args, char *spawn_name, int *pid)
 }
 
 void
-spawn_insert(char *name, char *args)
+spawn_insert(const char *name, const char *args)
 {
        char                    *arg, *cp, *ptr;
        struct spawn_prog       *sp;
@@ -5562,7 +5563,7 @@ spawn_remove(struct spawn_prog *sp)
 }
 
 void
-spawn_replace(struct spawn_prog *sp, char *name, char *args)
+spawn_replace(struct spawn_prog *sp, const char *name, const char *args)
 {
        DNPRINTF(SWM_D_SPAWN, "spawn_replace: %s [%s]\n", sp->name, name);
 
@@ -5573,7 +5574,7 @@ spawn_replace(struct spawn_prog *sp, char *name, char *args)
 }
 
 void
-setspawn(char *name, char *args)
+setspawn(const char *name, const char *args)
 {
        struct spawn_prog       *sp;
 
@@ -5705,7 +5706,7 @@ parsekeys(char *keystr, unsigned int currmod, unsigned int *mod, KeySym *ks)
 }
 
 char *
-strdupsafe(char *str)
+strdupsafe(const char *str)
 {
        if (str == NULL)
                return (NULL);
@@ -5714,7 +5715,8 @@ strdupsafe(char *str)
 }
 
 void
-key_insert(unsigned int mod, KeySym ks, enum keyfuncid kfid, char *spawn_name)
+key_insert(unsigned int mod, KeySym ks, enum keyfuncid kfid,
+    const char *spawn_name)
 {
        struct key              *kp;
 
@@ -5758,7 +5760,7 @@ key_remove(struct key *kp)
 
 void
 key_replace(struct key *kp, unsigned int mod, KeySym ks, enum keyfuncid kfid,
-    char *spawn_name)
+    const char *spawn_name)
 {
        DNPRINTF(SWM_D_KEY, "key_replace: %s [%s]\n", keyfuncs[kp->funcid].name,
            spawn_name);
@@ -5771,7 +5773,7 @@ key_replace(struct key *kp, unsigned int mod, KeySym ks, enum keyfuncid kfid,
 
 void
 setkeybinding(unsigned int mod, KeySym ks, enum keyfuncid kfid,
-    char *spawn_name)
+    const char *spawn_name)
 {
        struct key              *kp;
 
@@ -6710,7 +6712,7 @@ struct config_option configopt[] = {
 };
 
 int
-conf_load(char *filename, int keymapping)
+conf_load(const char *filename, int keymapping)
 {
        FILE                    *config;
        char                    *line, *cp, *optsub, *optval;
@@ -8175,6 +8177,8 @@ scan_xrandr(int i)
        xcb_randr_crtc_t                                *crtc;
        xcb_screen_t                                    *screen;
 
+       DNPRINTF(SWM_D_MISC, "scan_xrandr: screen: %d\n", i);
+
        if ((screen = get_screen(i)) == NULL)
                errx(1, "ERROR: can't get screen %d.", i);
 
@@ -8202,7 +8206,7 @@ scan_xrandr(int i)
                        new_region(&screens[i], 0, 0,
                            screen->width_in_pixels,
                            screen->height_in_pixels);
-                       return;
+                       goto out;
                } else
                        ncrtc = srr->num_crtcs;
 
@@ -8228,12 +8232,16 @@ scan_xrandr(int i)
                        free(cir);
                }
                free(srr);
-       } else
+       }
 #endif /* SWM_XRR_HAS_CRTC */
-       {
+
+       /* If detection failed, create a single region that spans the screen. */
+       if (TAILQ_EMPTY(&screens[i].rl))
                new_region(&screens[i], 0, 0, screen->width_in_pixels,
                    screen->height_in_pixels);
-       }
+
+out:
+       DNPRINTF(SWM_D_MISC, "scan_xrandr: done.\n");
 }
 
 void