Add workspace starting layouts

example/config.lua

@@ -47,6 +47,15 @@ monitors = {
 	--   layout = "dwindle", x = -1, y = -1 },
 }
 
+-- Per-workspace default layouts (overrides the monitor layout for a given workspace)
+-- workspaces = {
+--   layouts = {
+--     [1] = { layout = "dwindle" },
+--     [2] = { layout = "master" },
+--     [3] = { layout = "monocle" },
+--   },
+-- }
+
 -- autostart: it starts stuff in sequence
 autostart = {
 	"dbus-update-activation-environment --systemd WAYLAND_DISPLAY XDG_SESSION_TYPE XDG_CURRENT_DESKTOP",

parser/parser.c

@@ -559,6 +559,36 @@ parse_scrolls(lua_State *L, Config *cfg)
 	lua_pop(L, 1); /* scrolls table */
 }
 
+static void
+parse_workspace_layouts(lua_State *L, Config *cfg)
+{
+	lua_getglobal(L, "workspaces");
+	if (!lua_istable(L, -1)) {
+		lua_pop(L, 1);
+		return;
+	}
+
+	lua_getfield(L, -1, "layouts");
+	if (!lua_istable(L, -1)) {
+		lua_pop(L, 2);
+		return;
+	}
+
+	/* Iterate over array-like entries; the numeric key is the workspace number */
+	int n = (int)lua_rawlen(L, -1);
+	for (int ws = 1; ws <= n && ws <= 9; ws++) {
+		lua_rawgeti(L, -1, ws);
+		if (!lua_istable(L, -1)) { lua_pop(L, 1); continue; }
+
+		lua_get_string(L, "layout", cfg->workspace_layouts[ws - 1],
+		               sizeof(cfg->workspace_layouts[ws - 1]));
+
+		lua_pop(L, 1); /* entry table */
+	}
+
+	lua_pop(L, 2); /* layouts + workspaces */
+}
+
 static void
 parse_autostart(lua_State *L, Config *cfg)
 {
@@ -648,6 +678,7 @@ config_load(const char *path, Config *cfg)
 	parse_input     (L, &cfg->input);
 	parse_rules     (L, cfg);
 	parse_monitors  (L, cfg);
+	parse_workspace_layouts(L, cfg);
 	parse_keybinds  (L, cfg);
 	parse_buttons   (L, cfg);
 	parse_scrolls   (L, cfg);

parser/parser.h

@@ -134,6 +134,9 @@ typedef struct {
 
 	CfgAutostart  autostart[CFG_MAX_AUTOSTART];
 	int           nautostart;
+
+	/* Per-workspace (tag) default layouts, indexed by tag index 0-8 */
+	char workspace_layouts[9][CFG_MAX_STRLEN];
 } Config;
 
 /* Public API */

src/peachwm.c

@@ -523,6 +523,36 @@ static const char *custom_cfg_path;
 #include "ipc.h"
 
 /* function implementations */
+
+/* Apply a workspace default layout for the given tag index (0-based) on monitor
+ * m */
+static void apply_workspace_layout(Monitor *m, int tag_idx) {
+  if (tag_idx < 0 || tag_idx >= TAGCOUNT)
+    return;
+  const char *layout_name = cfg.workspace_layouts[tag_idx];
+  if (!layout_name[0])
+    return;
+
+  for (int li = 0; li < (int)LENGTH(layouts); li++) {
+    if (layouts[li].symbol && !strcmp(layout_name, layouts[li].symbol)) {
+      m->lt[m->sellt] = &layouts[li];
+      break;
+    }
+    if (!strcmp(layout_name, "dwindle") && layouts[li].arrange == dwindle) {
+      m->lt[m->sellt] = &layouts[li];
+      break;
+    }
+    if (!strcmp(layout_name, "master") && layouts[li].arrange == master) {
+      m->lt[m->sellt] = &layouts[li];
+      break;
+    }
+    if (!strcmp(layout_name, "monocle") && layouts[li].arrange == monocle) {
+      m->lt[m->sellt] = &layouts[li];
+      break;
+    }
+  }
+}
+
 void applybounds(Client *c, struct wlr_box *bbox) {
   /* set minimum possible */
   c->geom.width = MAX(1 + 2 * (int)c->bw, c->geom.width);
@@ -1194,6 +1224,8 @@ void createmon(struct wl_listener *listener, void *data) {
           }
         }
         m->lt[1] = &layouts[LENGTH(layouts) > 1 && m->lt[0] != &layouts[1]];
+        /* Apply per-workspace default for the initial tag (workspace 1) */
+        apply_workspace_layout(m, 0);
         strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, LENGTH(m->ltsymbol));
         wlr_output_state_set_scale(&state, r->scale);
         wlr_output_state_set_transform(&state, r->transform);
@@ -2780,7 +2812,10 @@ static void on_config_reload(const Config *newcfg, void *ud) {
   Monitor *m;
   (void)ud;
   cfg = *newcfg;
-  wl_list_for_each(m, &mons, link) arrange(m);
+  wl_list_for_each(m, &mons, link) {
+    apply_workspace_layout(m, current_tag_idx(m));
+    arrange(m);
+  }
   printstatus();
 }
 
@@ -3642,6 +3677,8 @@ void toggleview(const Arg *arg) {
     return;
 
   selmon->tagset[selmon->seltags] = newtagset;
+  /* Apply per-workspace default layout if configured */
+  apply_workspace_layout(selmon, current_tag_idx(selmon));
   focusclient(focustop(selmon), 1);
   arrange(selmon);
   printstatus();
@@ -3816,6 +3853,8 @@ void view(const Arg *arg) {
   selmon->seltags ^= 1; /* toggle sel tagset */
   if (arg->ui & TAGMASK)
     selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
+  /* Apply per-workspace default layout if configured */
+  apply_workspace_layout(selmon, current_tag_idx(selmon));
   focusclient(focustop(selmon), 1);
   arrange(selmon);
   printstatus();