Make "[move] workspace number" accept a default ws name after the ws number

docs/userguide

@@ -1427,10 +1427,10 @@ workspace using +move container to workspace back_and_forth+.
 workspace <next|prev|next_on_output|prev_on_output>
 workspace back_and_forth
 workspace <name>
-workspace number <number>
+workspace number <name>
 
 move [window|container] [to] workspace <name>
-move [window|container] [to] workspace number <number>
+move [window|container] [to] workspace number <name>
 move [window|container] [to] workspace <prev|next|current>
 -----------------------------------
 
@@ -1482,7 +1482,8 @@ workspaces are ordered the way they appeared. When they start with a number, i3
 will order them numerically. Also, you will be able to use +workspace number 1+
 to switch to the workspace which begins with number 1, regardless of which name
 it has. This is useful in case you are changing the workspace’s name
-dynamically.
+dynamically. To combine both commands you can use +workspace number 1: mail+ to
+specify a default name if there's currently no workspace starting with a "1".
 
 ==== Renaming workspaces
 

src/commands.c

@@ -502,7 +502,7 @@ void cmd_move_con_to_workspace_name(I3_CMD, char *name) {
 }
 
 /*
- * Implementation of 'move [window|container] [to] workspace number <number>'.
+ * Implementation of 'move [window|container] [to] workspace number <name>'.
  *
  */
 void cmd_move_con_to_workspace_number(I3_CMD, char *which) {
@@ -526,8 +526,8 @@ void cmd_move_con_to_workspace_number(I3_CMD, char *which) {
     if (parsed_num == LONG_MIN ||
         parsed_num == LONG_MAX ||
         parsed_num < 0 ||
-        *endptr != '\0') {
-        LOG("Could not parse \"%s\" as a number.\n", which);
+        endptr == which) {
+        LOG("Could not parse initial part of \"%s\" as a number.\n", which);
         y(map_open);
         ystr("success");
         y(bool, false);
@@ -866,7 +866,7 @@ void cmd_workspace(I3_CMD, char *which) {
 }
 
 /*
- * Implementation of 'workspace number <number>'
+ * Implementation of 'workspace number <name>'
  *
  */
 void cmd_workspace_number(I3_CMD, char *which) {
@@ -877,8 +877,8 @@ void cmd_workspace_number(I3_CMD, char *which) {
     if (parsed_num == LONG_MIN ||
         parsed_num == LONG_MAX ||
         parsed_num < 0 ||
-        *endptr != '\0') {
-        LOG("Could not parse \"%s\" as a number.\n", which);
+        endptr == which) {
+        LOG("Could not parse initial part of \"%s\" as a number.\n", which);
         y(map_open);
         ystr("success");
         y(bool, false);
@@ -897,8 +897,6 @@ void cmd_workspace_number(I3_CMD, char *which) {
     if (!workspace) {
         LOG("There is no workspace with number %ld, creating a new one.\n", parsed_num);
         ysuccess(true);
-        /* terminate the which string after the endposition of the number */
-        *endptr = '\0';
         workspace_show_by_name(which);
         cmd_output->needs_tree_render = true;
         return;

testcases/t/117-workspace.t

@@ -156,6 +156,34 @@ ok(!workspace_exists('5'), 'workspace 5 does not exist');
 cmd 'workspace number 5';
 ok(workspace_exists('5'), 'workspace 5 was created');
 
+################################################################################
+# Check that we can go to workspace "7: foo" with the command
+# "workspace number 7: bar", i.e. the additional workspace name is ignored.
+################################################################################
+
+ok(!workspace_exists('7'), 'workspace 7 does not exist');
+ok(!workspace_exists('7: bar'), 'workspace 7: bar does not exist');
+ok(!workspace_exists('7: foo'), 'workspace 7: foo does not exist yet');
+cmd 'workspace 7: foo';
+ok(workspace_exists('7: foo'), 'workspace 7: foo was created');
+cmd 'open';
+
+cmd 'workspace 6';
+ok(workspace_exists('7: foo'), 'workspace 7: foo still open');
+cmd 'workspace number 7: bar';
+is(focused_ws(), '7: foo', 'now on workspace 7: foo');
+ok(!workspace_exists('7'), 'workspace 7 still does not exist');
+ok(!workspace_exists('7: bar'), 'workspace 7: bar still does not exist');
+
+################################################################################
+# Check that "workspace number 8: foo" will create workspace "8: foo" if it
+# does not yet exist (just like "workspace 8: foo" would).
+################################################################################
+
+ok(!workspace_exists('8: foo'), 'workspace 8: foo does not exist');
+cmd 'workspace number 8: foo';
+ok(workspace_exists('8: foo'), 'workspace 8: foo was created');
+
 ################################################################################
 # Verify that renaming workspaces works.
 ################################################################################

testcases/t/132-move-workspace.t

@@ -79,6 +79,28 @@ is_num_children('12', 0, 'no container on 12 anymore');
 
 ok(!workspace_exists('13'), 'workspace 13 does still not exist');
 
+################################################################################
+# Check that 'move to workspace number <number><name>' works to move a window to
+# named workspaces which start with <number>.
+################################################################################
+
+cmd 'workspace 15: meh';
+cmd 'open';
+is_num_children('15: meh', 1, 'one container on 15: meh');
+
+ok(!workspace_exists('15'), 'workspace 15 does not exist yet');
+ok(!workspace_exists('15: duh'), 'workspace 15: duh does not exist yet');
+
+cmd 'workspace 14';
+cmd 'open';
+
+cmd 'move to workspace number 15: duh';
+is_num_children('15: meh', 2, 'two containers on 15: meh');
+is_num_children('14', 0, 'no container on 14 anymore');
+
+ok(!workspace_exists('15'), 'workspace 15 does still not exist');
+ok(!workspace_exists('15: duh'), 'workspace 15 does still not exist');
+
 ###################################################################
 # check if 'move workspace next' and 'move workspace prev' work
 ###################################################################