commands: allow criterion values to be unquoted

Sometimes it doesn't really make sense to quote them (numeric values for
example)

In that case, the value is parsed until the next space or the end of the
whole criteria expression

sway/criteria.c

@@ -114,6 +114,7 @@ static char *crit_tokens(int *argc, char ***buf, const char * const criteria_str
 
 	char **argv = *buf = calloc(max_tokens, sizeof(char*));
 	argv[0] = base; // this needs to be freed by caller
+	bool quoted = true;
 
 	*argc = 1; // uneven = name, even = value
 	while (*head && *argc < max_tokens) {
@@ -134,7 +135,8 @@ static char *crit_tokens(int *argc, char ***buf, const char * const criteria_str
 				if (*(namep) == ' ') {
 					namep = strrchr(namep, ' ') + 1;
 				}
-				argv[(*argc)++] = namep;
+				argv[*argc] = namep;
+				*argc += 1;
 			}
 		} else if (*head == '"') {
 			if (*argc % 2 != 0) {
@@ -143,21 +145,38 @@ static char *crit_tokens(int *argc, char ***buf, const char * const criteria_str
 					"Found quoted value where it was not expected");
 			} else if (!valp) { // value starts here
 				valp = head + 1;
+				quoted = true;
 			} else {
 				// value ends here
-				argv[(*argc)++] = valp;
+				argv[*argc] = valp;
+				*argc += 1;
 				*head = '\0';
 				valp = NULL;
 				namep = head + 1;
 			}
-		} else if (*argc % 2 == 0 && !valp && *head != ' ') {
-			// We're expecting a quoted value, haven't found one yet, and this
-			// is not an empty space.
-			return strdup("Unable to parse criteria: "
-				"Names must be unquoted, values must be quoted");
+		} else if (*argc % 2 == 0 && *head != ' ') {
+			// parse unquoted values
+			if (!valp) {
+				quoted = false;
+				valp = head;  // value starts here
+			}
+		} else if (valp && !quoted && *head == ' ') {
+			// value ends here
+			argv[*argc] = valp;
+			*argc += 1;
+			*head = '\0';
+			valp = NULL;
+			namep = head + 1;
 		}
 		head++;
 	}
+
+	// catch last unquoted value if needed
+	if (valp && !quoted && !*head) {
+		argv[*argc] = valp;
+		*argc += 1;
+	}
+
 	return NULL;
 }