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bug#10053: Wrong use of minibuffer-completion-table in tmm-add-prompt

From: Stefan Monnier
Subject: bug#10053: Wrong use of minibuffer-completion-table in tmm-add-prompt
Date: Tue, 15 Nov 2011 21:26:17 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.91 (gnu/linux)

> If i use in tmm-add-prompt:

> (all-completions "" minibuffer-completion-table)

> instead of

> (mapcar 'car minibuffer-completion-table)

> i have no error, and a completions buffer with a list of buffers.

But the error is that tmm-add-prompt should not be run in that case.
It should only be run when you use tmm-prompt or tmm-menubar.

I see a small error in tmm.el which could explain why tmm-add-prompt
lingers on minibuffer-setup-hook longer than desired.  I've installed the
patch below, please see if it helps.


=== modified file 'lisp/tmm.el'
--- lisp/tmm.el 2011-01-25 04:08:28 +0000
+++ lisp/tmm.el 2011-11-16 02:19:47 +0000
@@ -37,7 +37,6 @@
 ;;; The following will be localized, added only to pacify the compiler.
 (defvar tmm-short-cuts)
 (defvar tmm-old-mb-map nil)
-(defvar tmm-old-comp-map)
 (defvar tmm-c-prompt nil)
 (defvar tmm-km-list)
 (defvar tmm-next-shortcut-digit)
@@ -158,7 +157,7 @@
   (let ((gl-str "Menu bar")  ;; The menu bar itself is not a menu keymap
                                        ; so it doesn't have a name.
        tmm-km-list out history history-len tmm-table-undef tmm-c-prompt
-       tmm-old-mb-map tmm-old-comp-map tmm-short-cuts
+       tmm-old-mb-map tmm-short-cuts
        chosen-string choice
        (not-menu (not (keymapp menu))))
     (run-hooks 'activate-menubar-hook)
@@ -219,23 +218,16 @@
             (setq history-len (length history))
             (setq history (append history history history history))
             (setq tmm-c-prompt (nth (- history-len 1 index-of-default) 
-            (add-hook 'minibuffer-setup-hook 'tmm-add-prompt)
-            (if default-item
-                (setq out (car (nth index-of-default tmm-km-list)))
-              (save-excursion
-                (unwind-protect
                     (setq out
+                   (if default-item
+                       (car (nth index-of-default tmm-km-list))
+                     (minibuffer-with-setup-hook #'tmm-add-prompt
                            (concat gl-str
                                    " (up/down to change, PgUp to menu): ")
                            tmm-km-list nil t nil
                            (cons 'history
-                                 (- (* 2 history-len) index-of-default))))
-                   (remove-hook 'minibuffer-setup-hook 'tmm-add-prompt)
-                   (if (get-buffer "*Completions*")
-                       (with-current-buffer "*Completions*"
-                         (use-local-map tmm-old-comp-map)
-                         (bury-buffer (current-buffer)))))))))
+                              (- (* 2 history-len) index-of-default))))))))
       (setq choice (cdr (assoc out tmm-km-list)))
       (and (null choice)
           (> (length out) (length tmm-c-prompt))
@@ -270,7 +262,7 @@
 (defun tmm-add-shortcuts (list)
-  "Adds shortcuts to cars of elements of the list.
+  "Add shortcuts to cars of elements of the list.
 Takes a list of lists with a string as car, returns list with
 shortcuts added to these cars.
 Stores a list of all the shortcuts in the free variable `tmm-short-cuts'."
@@ -362,7 +354,6 @@
     (set-buffer-modified-p nil)))
 (defun tmm-add-prompt ()
-  (remove-hook 'minibuffer-setup-hook 'tmm-add-prompt)
   (add-hook 'minibuffer-exit-hook 'tmm-delete-map nil t)
   (unless tmm-c-prompt
     (error "No active menu entries"))
@@ -387,9 +378,7 @@
     (other-window 1)                   ; Electric-pop-up-window does
                                        ; not work in minibuffer
-    (Electric-pop-up-window "*Completions*")
-    (with-current-buffer "*Completions*"
-      (setq tmm-old-comp-map (tmm-define-keys nil))))
+    (Electric-pop-up-window "*Completions*"))
   (insert tmm-c-prompt))
 (defun tmm-delete-map ()
@@ -424,16 +413,18 @@
 (defun tmm-goto-completions ()
+  "Jump to the completions buffer."
   (let ((prompt-end (minibuffer-prompt-end)))
     (setq tmm-c-prompt (buffer-substring prompt-end (point-max)))
+    ;; FIXME: Why?
     (delete-region prompt-end (point-max)))
   (switch-to-buffer-other-window "*Completions*")
   (search-forward tmm-c-prompt)
   (search-backward tmm-c-prompt))
 (defun tmm-get-keymap (elt &optional in-x-menu)
-  "Prepends (DOCSTRING EVENT BINDING) to free variable `tmm-km-list'.
+  "Prepend (DOCSTRING EVENT BINDING) to free variable `tmm-km-list'.
 The values are deduced from the argument ELT, that should be an
 element of keymap, an `x-popup-menu' argument, or an element of
 `x-popup-menu' argument (when IN-X-MENU is not-nil).

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