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suggestion for imenu

From: Konstantin Malakhanov
Subject: suggestion for imenu
Date: Wed, 19 Jun 2002 14:39:57 +0200
User-agent: Gnus/5.090006 (Oort Gnus v0.06) Emacs/21.2 (i386-msvc-nt5.0.2195)

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In GNU Emacs 21.2.1 (i386-msvc-nt5.0.2195)
 of 2002-06-18 on TRITON
configured using `configure --with-msvc (12.00)'
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: DEU
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: nil

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

It's not a bug, its a suggestion for imenu.

I introduce a new option for imenu: if imenu call finds a reasonalble
completion, use it without prompt, with possibilities 'never (current
imenu behaviour), for mouse event only and always. 

Notice that this is different from
imenu-always-use-completion-buffer-p, which just select between asking
in completion buffer or as mouse menu.

I don't like the standard way if imenu, where I have always confirm
jump to a function, whether imenu has found a suitable name at the
point or not. With the new option , if imenu "sees" a suitable name,
it just go to it without confirmation. Next, I patch imenu to set
point to where the mouse click occurs, if imenu is called via
mouse. So now I can bind (define-key esc-map [mouse-1] 'imenu)

and with a click at the function name somewhere in the source code I
get it's definition. Speeds up things a lot!

A patch is beneath.
--- /cygdrive/c/emacs-21.2/lisp/imenu.el        Sun Jul 15 16:15:34 2001
+++ /cygdrive/h/emacs/imenu.el  Tue Dec  4 09:01:38 2001
@@ -174,6 +174,13 @@
   :type 'string
   :group 'imenu)
+(defcustom imenu-use-default-completion nil
+  "*If imenu call finds a reasonalble completion, use it without prompt." 
+  :type '(choice (const :tag "On Mouse" nil)
+                (const :tag "Never - use prompt anyway" never)
+                (other :tag "Always" t))
+  :group 'imenu)
 (defvar imenu-generic-expression nil
   "The regex pattern to use for creating a buffer index.
@@ -870,6 +877,8 @@
 Returns t for rescan and otherwise a position number."
   ;; Create a list for this buffer only when needed.
+  (if (listp last-nonmenu-event) 
+      (mouse-set-point last-nonmenu-event))
   (let ((name (thing-at-point 'symbol))
@@ -883,6 +892,10 @@
          ((and name (imenu--in-alist name prepared-index-alist))
           (setq prompt (format "Index item (default %s): " name)))
          (t (setq prompt "Index item: ")))
+    (if (or (null name) ;; no name found
+           (and (null imenu-use-default-completion) ;; use name if mouse & not 
mouse event 
+                (not (listp last-nonmenu-event)))
+           (eq imenu-use-default-completion 'never)) ;; never use name, always 
go though prompt
     (if (eq imenu-always-use-completion-buffer-p 'never)
        (setq name (completing-read prompt
@@ -902,7 +915,7 @@
          ;; Make a completion question
          (setq name (completing-read prompt
-                                     nil t nil 'imenu--history-list name)))))
+                                         nil t nil 'imenu--history-list 
     (cond ((not (stringp name))
          ((string= name (car imenu--rescan-item))

Konstantin Malakhanov 

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