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1.1 ! root 1: ;; Copyright (C) 1986 Free Software Foundation, Inc. ! 2: ! 3: ;; This file is part of GNU Emacs. ! 4: ! 5: ;; GNU Emacs is free software; you can redistribute it and/or modify ! 6: ;; it under the terms of the GNU General Public License as published by ! 7: ;; the Free Software Foundation; either version 1, or (at your option) ! 8: ;; any later version. ! 9: ! 10: ;; GNU Emacs is distributed in the hope that it will be useful, ! 11: ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ! 12: ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ! 13: ;; GNU General Public License for more details. ! 14: ! 15: ;; You should have received a copy of the GNU General Public License ! 16: ;; along with GNU Emacs; see the file COPYING. If not, write to ! 17: ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. ! 18: ! 19: ! 20: (defmacro caar (conscell) ! 21: (list 'car (list 'car conscell))) ! 22: ! 23: (defmacro cdar (conscell) ! 24: (list 'cdr (list 'car conscell))) ! 25: ! 26: (defun x-menu-mode () ! 27: "Major mode for creating permanent menus for use with X. ! 28: These menus are implemented entirely in Lisp; popup menus, implemented ! 29: with x-popup-menu, are implemented using XMenu primitives." ! 30: (make-local-variable 'x-menu-items-per-line) ! 31: (make-local-variable 'x-menu-item-width) ! 32: (make-local-variable 'x-menu-items-alist) ! 33: (make-local-variable 'x-process-mouse-hook) ! 34: (make-local-variable 'x-menu-assoc-buffer) ! 35: (setq buffer-read-only t) ! 36: (setq truncate-lines t) ! 37: (setq x-process-mouse-hook 'x-menu-pick-entry) ! 38: (setq mode-line-buffer-identification '("MENU: %32b"))) ! 39: ! 40: (defvar x-menu-max-width 0) ! 41: (defvar x-menu-items-per-line 0) ! 42: (defvar x-menu-item-width 0) ! 43: (defvar x-menu-items-alist nil) ! 44: (defvar x-menu-assoc-buffer nil) ! 45: ! 46: (defvar x-menu-item-spacing 1 ! 47: "*Minimum horizontal spacing between objects in a permanent X menu.") ! 48: ! 49: (defun x-menu-create-menu (name) ! 50: "Create a permanent X menu. Returns an item which should be used as a ! 51: menu object whenever referring to the menu." ! 52: (let ((old (current-buffer)) ! 53: (buf (get-buffer-create name))) ! 54: (set-buffer buf) ! 55: (x-menu-mode) ! 56: (setq x-menu-assoc-buffer old) ! 57: (set-buffer old) ! 58: buf)) ! 59: ! 60: (defun x-menu-change-associated-buffer (menu buffer) ! 61: "Change associated buffer of MENU to BUFFER. BUFFER should be a buffer ! 62: object." ! 63: (let ((old (current-buffer))) ! 64: (set-buffer menu) ! 65: (setq x-menu-assoc-buffer buffer) ! 66: (set-buffer old))) ! 67: ! 68: (defun x-menu-add-item (menu item binding) ! 69: "Adds to MENU an item with name ITEM, associated with BINDING. ! 70: Following a sequence of calls to x-menu-add-item, a call to x-menu-compute ! 71: should be performed before the menu will be made available to the user. ! 72: ! 73: BINDING should be a function of one argument, which is the numerical ! 74: button/key code as defined in x-menu.el." ! 75: (let ((old (current-buffer)) ! 76: elt) ! 77: (set-buffer menu) ! 78: (if (setq elt (assoc item x-menu-items-alist)) ! 79: (rplacd elt binding) ! 80: (setq x-menu-items-alist (append x-menu-items-alist ! 81: (list (cons item binding))))) ! 82: (set-buffer old) ! 83: item)) ! 84: ! 85: (defun x-menu-delete-item (menu item) ! 86: "Deletes from MENU the item named ITEM. x-menu-compute should be called ! 87: before the menu is made available to the user." ! 88: (let ((old (current-buffer)) ! 89: elt) ! 90: (set-buffer menu) ! 91: (if (setq elt (assoc item x-menu-items-alist)) ! 92: (rplaca elt nil)) ! 93: (set-buffer old) ! 94: item)) ! 95: ! 96: (defun x-menu-activate (menu) ! 97: "Computes all necessary parameters for MENU. This must be called whenever ! 98: a menu is modified before it is made available to the user. ! 99: ! 100: This also creates the menu itself." ! 101: (let ((buf (current-buffer))) ! 102: (pop-to-buffer menu) ! 103: (let (buffer-read-only) ! 104: (setq x-menu-max-width (1- (screen-width))) ! 105: (setq x-menu-item-width 0) ! 106: (let (items-head ! 107: (items-tail x-menu-items-alist)) ! 108: (while items-tail ! 109: (if (caar items-tail) ! 110: (progn (setq items-head (cons (car items-tail) items-head)) ! 111: (setq x-menu-item-width ! 112: (max x-menu-item-width ! 113: (length (caar items-tail)))))) ! 114: (setq items-tail (cdr items-tail))) ! 115: (setq x-menu-items-alist (reverse items-head))) ! 116: (setq x-menu-item-width (+ x-menu-item-spacing x-menu-item-width)) ! 117: (setq x-menu-items-per-line ! 118: (max 1 (/ x-menu-max-width x-menu-item-width))) ! 119: (erase-buffer) ! 120: (let ((items-head x-menu-items-alist)) ! 121: (while items-head ! 122: (let ((items 0)) ! 123: (while (and items-head ! 124: (<= (setq items (1+ items)) x-menu-items-per-line)) ! 125: (insert (format (concat "%" ! 126: (int-to-string x-menu-item-width) "s") ! 127: (caar items-head))) ! 128: (setq items-head (cdr items-head)))) ! 129: (insert ?\n))) ! 130: (shrink-window (max 0 ! 131: (- (window-height) ! 132: (1+ (count-lines (point-min) (point-max)))))) ! 133: (goto-char (point-min))) ! 134: (pop-to-buffer buf))) ! 135: ! 136: (defun x-menu-pick-entry (position event) ! 137: "Internal function for dispatching on mouse/menu events" ! 138: (let* ((x (min (1- x-menu-items-per-line) ! 139: (/ (current-column) x-menu-item-width))) ! 140: (y (- (count-lines (point-min) (point)) ! 141: (if (zerop (current-column)) 0 1))) ! 142: (item (+ x (* y x-menu-items-per-line))) ! 143: (litem (cdr (nth item x-menu-items-alist)))) ! 144: (and litem (funcall litem event))) ! 145: (pop-to-buffer x-menu-assoc-buffer))
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