1 files changed, 80 insertions, 25 deletions

diff --git a/sway/commands/layout.c b/sway/commands/layout.c
index c446f1f9..f4e4dda9 100644
--- a/sway/commands/layout.c
+++ b/sway/commands/layout.c
@@ -1,3 +1,4 @@
+#include <stdbool.h>
 #include <string.h>
 #include <strings.h>
 #include "sway/commands.h"
@@ -5,6 +6,26 @@
 #include "sway/tree/container.h"
 #include "log.h"
 
+static bool parse_layout_string(char *s, enum sway_container_layout *ptr) {
+	if (strcasecmp(s, "splith") == 0) {
+		*ptr = L_HORIZ;
+	} else if (strcasecmp(s, "splitv") == 0) {
+		*ptr = L_VERT;
+	} else if (strcasecmp(s, "tabbed") == 0) {
+		*ptr = L_TABBED;
+	} else if (strcasecmp(s, "stacking") == 0) {
+		*ptr = L_STACKED;
+	} else {
+		return false;
+	}
+	return true;
+}
+
+static const char* expected_syntax =
+	"Expected 'layout default|tabbed|stacking|splitv|splith' or "
+	"'layout toggle [split|all]' or "
+	"'layout toggle [split|tabbed|stacking|splitv|splith] [split|tabbed|stacking|splitv|splith]...'";
+
 struct cmd_results *cmd_layout(int argc, char **argv) {
 	struct cmd_results *error = NULL;
 	if ((error = checkarg(argc, "layout", EXPECTED_MORE_THAN, 0))) {
@@ -21,35 +42,69 @@ struct cmd_results *cmd_layout(int argc, char **argv) {
 		parent = parent->parent;
 	}
 
-	if (strcasecmp(argv[0], "default") == 0) {
-		parent->layout = parent->prev_layout;
-		if (parent->layout == L_NONE) {
-			parent->layout = container_get_default_layout(parent);
-		}
-	} else {
-		if (parent->layout != L_TABBED && parent->layout != L_STACKED) {
-			parent->prev_layout = parent->layout;
-		}
-
-		if (strcasecmp(argv[0], "splith") == 0) {
-			parent->layout = L_HORIZ;
-		} else if (strcasecmp(argv[0], "splitv") == 0) {
-			parent->layout = L_VERT;
-		} else if (strcasecmp(argv[0], "tabbed") == 0) {
-			parent->layout = L_TABBED;
-		} else if (strcasecmp(argv[0], "stacking") == 0) {
-			parent->layout = L_STACKED;
-		} else if (strcasecmp(argv[0], "toggle") == 0 && argc == 2 && strcasecmp(argv[1], "split") == 0) {
-			if (parent->layout == L_HORIZ) {
-				parent->layout = L_VERT;
+	enum sway_container_layout prev = parent->layout;
+	bool assigned_directly = parse_layout_string(argv[0], &parent->layout);
+	if (!assigned_directly) {
+		if (strcasecmp(argv[0], "default") == 0) {
+			parent->layout = parent->prev_split_layout;
+		} else if (strcasecmp(argv[0], "toggle") == 0) {
+			if (argc == 1) {
+				parent->layout =
+					parent->layout == L_STACKED ? L_TABBED :
+					parent->layout == L_TABBED ? parent->prev_split_layout : L_STACKED;
+			} else if (argc == 2) {
+				if (strcasecmp(argv[1], "all") == 0) {
+					parent->layout =
+						parent->layout == L_HORIZ ? L_VERT :
+						parent->layout == L_VERT ? L_STACKED :
+						parent->layout == L_STACKED ? L_TABBED : L_HORIZ;
+				} else if (strcasecmp(argv[1], "split") == 0) {
+					parent->layout =
+						parent->layout == L_HORIZ ? L_VERT :
+						parent->layout == L_VERT ? L_HORIZ : parent->prev_split_layout;
+				} else {
+					return cmd_results_new(CMD_INVALID, "layout", expected_syntax);
+				}
 			} else {
-				parent->layout = L_HORIZ;
+				enum sway_container_layout parsed_layout;
+				int curr = 1;
+				for (; curr < argc; curr++) {
+					bool valid = parse_layout_string(argv[curr], &parsed_layout);
+					if ((valid && parsed_layout == parent->layout) ||
+							(strcmp(argv[curr], "split") == 0 &&
+							(parent->layout == L_VERT || parent->layout == L_HORIZ))) {
+						break;
+					}
+				}
+				for (int i = curr + 1; i != curr; ++i) {
+					// cycle round to find next valid layout
+					if (i >= argc) {
+						i = 1;
+					}
+					if (parse_layout_string(argv[i], &parent->layout)) {
+						break;
+					} else if (strcmp(argv[i], "split") == 0) {
+						parent->layout =
+							parent->layout == L_HORIZ ? L_VERT :
+							parent->layout == L_VERT ? L_HORIZ : parent->prev_split_layout;
+						break;
+					} // invalid layout strings are silently ignored
+				}
 			}
+		} else {
+			return cmd_results_new(CMD_INVALID, "layout", expected_syntax);
 		}
 	}
-
-	container_notify_subtree_changed(parent);
-	arrange_windows(parent);
+	if (parent->layout == L_NONE) {
+		parent->layout = container_get_default_layout(parent);
+	}
+	if (prev != parent->layout) {
+		if (prev != L_TABBED && prev != L_STACKED) {
+			parent->prev_split_layout = prev;
+		}
+		container_notify_subtree_changed(parent);
+		arrange_windows(parent);
+	}
 
 	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
 }