1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
;;; x-menu.el --- menu support for X
;; Copyright (C) 1986 Free Software Foundation, Inc.
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Code:
(defun x-menu-mode ()
"Major mode for creating permanent menus for use with X.
These menus are implemented entirely in Lisp; popup menus, implemented
with x-popup-menu, are implemented using XMenu primitives."
(make-local-variable 'x-menu-items-per-line)
(make-local-variable 'x-menu-item-width)
(make-local-variable 'x-menu-items-alist)
(make-local-variable 'x-process-mouse-hook)
(make-local-variable 'x-menu-assoc-buffer)
(setq buffer-read-only t)
(setq truncate-lines t)
(setq x-process-mouse-hook 'x-menu-pick-entry)
(setq mode-line-buffer-identification '("MENU: %32b")))
(defvar x-menu-max-width 0)
(defvar x-menu-items-per-line 0)
(defvar x-menu-item-width 0)
(defvar x-menu-items-alist nil)
(defvar x-menu-assoc-buffer nil)
(defvar x-menu-item-spacing 1
"*Minimum horizontal spacing between objects in a permanent X menu.")
(defun x-menu-create-menu (name)
"Create a permanent X menu.
Returns an item which should be used as a
menu object whenever referring to the menu."
(let ((old (current-buffer))
(buf (get-buffer-create name)))
(set-buffer buf)
(x-menu-mode)
(setq x-menu-assoc-buffer old)
(set-buffer old)
buf))
(defun x-menu-change-associated-buffer (menu buffer)
"Change associated buffer of MENU to BUFFER.
BUFFER should be a buffer object."
(let ((old (current-buffer)))
(set-buffer menu)
(setq x-menu-assoc-buffer buffer)
(set-buffer old)))
(defun x-menu-add-item (menu item binding)
"Add to MENU an item with name ITEM, associated with BINDING.
Following a sequence of calls to x-menu-add-item, a call to x-menu-compute
should be performed before the menu will be made available to the user.
BINDING should be a function of one argument, which is the numerical
button/key code as defined in x-menu.el."
(let ((old (current-buffer))
elt)
(set-buffer menu)
(if (setq elt (assoc item x-menu-items-alist))
(rplacd elt binding)
(setq x-menu-items-alist (append x-menu-items-alist
(list (cons item binding)))))
(set-buffer old)
item))
(defun x-menu-delete-item (menu item)
"Delete from MENU the item named ITEM.
Call `x-menu-compute' before making the menu available to the user."
(let ((old (current-buffer))
elt)
(set-buffer menu)
(if (setq elt (assoc item x-menu-items-alist))
(rplaca elt nil))
(set-buffer old)
item))
(defun x-menu-activate (menu)
"Compute all necessary parameters for MENU.
This must be called whenever a menu is modified before it is made
available to the user. This also creates the menu itself."
(let ((buf (current-buffer)))
(pop-to-buffer menu)
(let (buffer-read-only)
(setq x-menu-max-width (1- (frame-width)))
(setq x-menu-item-width 0)
(let (items-head
(items-tail x-menu-items-alist))
(while items-tail
(if (car (car items-tail))
(progn (setq items-head (cons (car items-tail) items-head))
(setq x-menu-item-width
(max x-menu-item-width
(length (car (car items-tail)))))))
(setq items-tail (cdr items-tail)))
(setq x-menu-items-alist (reverse items-head)))
(setq x-menu-item-width (+ x-menu-item-spacing x-menu-item-width))
(setq x-menu-items-per-line
(max 1 (/ x-menu-max-width x-menu-item-width)))
(erase-buffer)
(let ((items-head x-menu-items-alist))
(while items-head
(let ((items 0))
(while (and items-head
(<= (setq items (1+ items)) x-menu-items-per-line))
(insert (format (concat "%"
(int-to-string x-menu-item-width) "s")
(car (car items-head))))
(setq items-head (cdr items-head))))
(insert ?\n)))
(shrink-window (max 0
(- (window-height)
(1+ (count-lines (point-min) (point-max))))))
(goto-char (point-min)))
(pop-to-buffer buf)))
(defun x-menu-pick-entry (position event)
"Internal function for dispatching on mouse/menu events"
(let* ((x (min (1- x-menu-items-per-line)
(/ (current-column) x-menu-item-width)))
(y (- (count-lines (point-min) (point))
(if (zerop (current-column)) 0 1)))
(item (+ x (* y x-menu-items-per-line)))
(litem (cdr (nth item x-menu-items-alist))))
(and litem (funcall litem event)))
(pop-to-buffer x-menu-assoc-buffer))
;;; x-menu.el ends here
|
