--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lisp/term/sun-mouse.el	Mon Aug 13 08:45:50 2007 +0200
@@ -0,0 +1,682 @@
+;;; sun-mouse.el --- mouse handling for Sun windows
+
+;; Copyright (C) 1987 Free Software Foundation, Inc.
+
+;; Author: Jeff Peck
+;; Maintainer: FSF
+;; Keywords: hardware
+
+;; 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, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;;; Commentary:
+
+;;; Jeff Peck, Sun Microsystems, Jan 1987.
+;;; Original idea by Stan Jefferson
+
+;;;
+;;;     Modelled after the GNUEMACS keymap interface.
+;;;
+;;; User Functions:
+;;;   make-mousemap, copy-mousemap, 
+;;;   define-mouse, global-set-mouse, local-set-mouse,
+;;;   use-global-mousemap, use-local-mousemap,
+;;;   mouse-lookup, describe-mouse-bindings
+;;;
+;;; Options:
+;;;   extra-click-wait, scrollbar-width
+;;;
+
+;;; Code:
+
+(defvar extra-click-wait 150
+  "*Number of milliseconds to wait for an extra click.
+Set this to zero if you don't want chords or double clicks.")
+
+(defvar scrollbar-width 5
+  "*The character width of the scrollbar.
+The cursor is deemed to be in the right edge scrollbar if it is this near the
+right edge, and more than two chars past the end of the indicated line.
+Setting to nil limits the scrollbar to the edge or vertical dividing bar.")
+
+;;;
+;;; Mousemaps
+;;;
+(defun make-mousemap ()
+  "Returns a new mousemap."
+  (cons 'mousemap nil))
+
+(defun copy-mousemap (mousemap)
+  "Return a copy of mousemap."
+  (copy-alist mousemap))
+
+(defun define-mouse (mousemap mouse-list def)
+  "Args MOUSEMAP, MOUSE-LIST, DEF.  Define MOUSE-LIST in MOUSEMAP as DEF.
+MOUSE-LIST is a list of atoms specifying a mouse hit according to these rules:
+  * One of these atoms specifies the active region of the definition.
+	text, scrollbar, modeline, minibuffer
+  * One or two or these atoms specify the button or button combination.
+        left, middle, right, double
+  * Any combination of these atoms specify the active shift keys.
+        control, shift, meta
+  * With a single unshifted button, you can add
+	up
+    to indicate an up-click.
+The atom `double' is used with a button designator to denote a double click.
+Two button chords are denoted by listing the two buttons.
+See sun-mouse-handler for the treatment of the form DEF."
+  (mousemap-set (mouse-list-to-mouse-code mouse-list) mousemap def))
+
+(defun global-set-mouse (mouse-list def)
+  "Give MOUSE-EVENT-LIST a local definition of DEF.
+See define-mouse for a description of MOUSE-EVENT-LIST and DEF.
+Note that if MOUSE-EVENT-LIST has a local definition in the current buffer,
+that local definition will continue to shadow any global definition."
+  (interactive "xMouse event: \nxDefinition: ")
+  (define-mouse current-global-mousemap mouse-list def))
+
+(defun local-set-mouse (mouse-list def)
+  "Give MOUSE-EVENT-LIST a local definition of DEF.
+See define-mouse for a description of the arguments.
+The definition goes in the current buffer's local mousemap.
+Normally buffers in the same major mode share a local mousemap."
+  (interactive "xMouse event: \nxDefinition: ")
+  (if (null current-local-mousemap)
+      (setq current-local-mousemap (make-mousemap)))
+  (define-mouse current-local-mousemap mouse-list def))
+
+(defun use-global-mousemap (mousemap)
+  "Selects MOUSEMAP as the global mousemap."
+  (setq current-global-mousemap mousemap))
+
+(defun use-local-mousemap (mousemap)
+  "Selects MOUSEMAP as the local mousemap.
+nil for MOUSEMAP means no local mousemap."
+  (setq current-local-mousemap mousemap))
+
+
+;;;
+;;; Interface to the Mouse encoding defined in Emacstool.c
+;;;
+;;; Called when mouse-prefix is sent to emacs, additional
+;;; information is read in as a list (button x y time-delta)
+;;;
+;;; First, some generally useful functions:
+;;;
+
+(defun logtest (x y)
+  "True if any bits set in X are also set in Y.
+Just like the Common Lisp function of the same name."
+  (not (zerop (logand x y))))
+
+
+;;;
+;;; Hit accessors.
+;;;
+
+(defconst sm::ButtonBits 7)		; Lowest 3 bits.
+(defconst sm::ShiftmaskBits 56)		; Second lowest 3 bits (56 = 63 - 7).
+(defconst sm::DoubleBits 64)		; Bit 7.
+(defconst sm::UpBits 128)		; Bit 8.
+
+;;; All the useful code bits
+(defmacro sm::hit-code (hit)
+  (` (nth 0 (, hit))))
+;;; The button, or buttons if a chord.
+(defmacro sm::hit-button (hit)
+  (` (logand sm::ButtonBits (nth 0 (, hit)))))
+;;; The shift, control, and meta flags.
+(defmacro sm::hit-shiftmask (hit)
+  (` (logand sm::ShiftmaskBits (nth 0 (, hit)))))
+;;; Set if a double click (but not a chord).
+(defmacro sm::hit-double (hit)
+  (` (logand sm::DoubleBits (nth 0 (, hit)))))
+;;; Set on button release (as opposed to button press).
+(defmacro sm::hit-up (hit)
+  (` (logand sm::UpBits (nth 0 (, hit)))))
+;;; Screen x position.
+(defmacro sm::hit-x (hit) (list 'nth 1 hit))
+;;; Screen y position.
+(defmacro sm::hit-y (hit) (list 'nth 2 hit))
+;;; Milliseconds since last hit.
+(defmacro sm::hit-delta (hit) (list 'nth 3 hit))
+
+(defmacro sm::hit-up-p (hit)		; A predicate.
+  (` (not (zerop (sm::hit-up (, hit))))))
+
+;;;
+;;; Loc accessors.  for sm::window-xy
+;;;
+(defmacro sm::loc-w (loc) (list 'nth 0 loc))
+(defmacro sm::loc-x (loc) (list 'nth 1 loc))
+(defmacro sm::loc-y (loc) (list 'nth 2 loc))
+
+(defmacro eval-in-buffer (buffer &rest forms)
+  "Macro to switches to BUFFER, evaluates FORMS, returns to original buffer."
+  ;; When you don't need the complete window context of eval-in-window
+  (` (let ((StartBuffer (current-buffer)))
+    (unwind-protect
+	(progn
+	  (set-buffer (, buffer))
+	  (,@ forms))
+    (set-buffer StartBuffer)))))
+
+(put 'eval-in-buffer 'lisp-indent-function 1)
+
+;;; this is used extensively by sun-fns.el
+;;;
+(defmacro eval-in-window (window &rest forms)
+  "Switch to WINDOW, evaluate FORMS, return to original window."
+  (` (let ((OriginallySelectedWindow (selected-window)))
+       (unwind-protect
+	   (progn
+	     (select-window (, window))
+	     (,@ forms))
+	 (select-window OriginallySelectedWindow)))))
+(put 'eval-in-window 'lisp-indent-function 1)
+
+;;;
+;;; handy utility, generalizes window_loop
+;;;
+
+;;; It's a macro (and does not evaluate its arguments).
+(defmacro eval-in-windows (form &optional yesmini)
+  "Switches to each window and evaluates FORM.  Optional argument
+YESMINI says to include the minibuffer as a window.
+This is a macro, and does not evaluate its arguments."
+  (` (let ((OriginallySelectedWindow (selected-window)))
+       (unwind-protect 
+	   (while (progn
+		    (, form)
+		    (not (eq OriginallySelectedWindow
+			     (select-window
+			      (next-window nil (, yesmini)))))))
+	 (select-window OriginallySelectedWindow)))))
+(put 'eval-in-window 'lisp-indent-function 0)
+
+(defun move-to-loc (x y)
+  "Move cursor to window location X, Y.
+Handles wrapped and horizontally scrolled lines correctly."
+  (move-to-window-line y)
+  ;; window-line-end expects this to return the window column it moved to.
+  (let ((cc (current-column))
+	(nc (move-to-column
+	     (if (zerop (window-hscroll))
+		 (+ (current-column)
+		    (min (- (window-width) 2)	; To stay on the line.
+			 x))
+	       (+ (window-hscroll) -1
+		  (min (1- (window-width))	; To stay on the line.
+		       x))))))
+    (- nc cc)))
+
+
+(defun minibuffer-window-p (window)
+  "True iff this WINDOW is minibuffer."
+  (= (frame-height)
+     (nth 3 (window-edges window))	; The bottom edge.
+     ))
+
+
+(defun sun-mouse-handler (&optional hit)
+  "Evaluates the function or list associated with a mouse hit.
+Expecting to read a hit, which is a list: (button x y delta).  
+A form bound to button by define-mouse is found by mouse-lookup. 
+The variables: *mouse-window*, *mouse-x*, *mouse-y* are bound.  
+If the form is a symbol (symbolp), it is funcall'ed with *mouse-window*,
+*mouse-x*, and *mouse-y* as arguments; if the form is a list (listp),
+the form is eval'ed; if the form is neither of these, it is an error.
+Returns nil."
+  (interactive)
+  (if (null hit) (setq hit (sm::combined-hits)))
+  (let ((loc (sm::window-xy (sm::hit-x hit) (sm::hit-y hit))))
+    (let ((*mouse-window* (sm::loc-w loc))
+	  (*mouse-x* (sm::loc-x loc))
+	  (*mouse-y* (sm::loc-y loc))
+	  (mouse-code (mouse-event-code hit loc)))
+      (let ((form (eval-in-buffer (window-buffer *mouse-window*)
+		    (mouse-lookup mouse-code))))
+	(cond ((null form)
+	       (if (not (sm::hit-up-p hit))	; undefined up hits are ok.
+		   (error "Undefined mouse event: %s" 
+			  (prin1-to-string 
+			   (mouse-code-to-mouse-list mouse-code)))))
+	      ((symbolp form)
+	       (setq this-command form)
+	       (funcall form *mouse-window* *mouse-x* *mouse-y*))
+	      ((listp form)
+	       (setq this-command (car form))
+	       (eval form))
+	      (t
+	       (error "Mouse action must be symbol or list, but was: %s"
+		      form))))))
+  ;; Don't let 'sun-mouse-handler get on last-command,
+  ;; since this function should be transparent.
+  (if (eq this-command 'sun-mouse-handler)
+      (setq this-command last-command))
+  ;; (message (prin1-to-string this-command))	; to see what your buttons did
+  nil)
+
+(defun sm::combined-hits ()
+  "Read and return next mouse-hit, include possible double click"
+  (let ((hit1 (mouse-hit-read)))
+    (if (not (sm::hit-up-p hit1))	; Up hits dont start doubles or chords.
+	(let ((hit2 (mouse-second-hit extra-click-wait)))
+	  (if hit2	; we cons'd it, we can smash it.
+	      ; (setf (sm::hit-code hit1) (logior (sm::hit-code hit1) ...))
+	      (setcar hit1 (logior (sm::hit-code hit1) 
+				   (sm::hit-code hit2)
+				   (if (= (sm::hit-button hit1) 
+					  (sm::hit-button hit2))
+				       sm::DoubleBits 0))))))
+    hit1))
+
+(defun mouse-hit-read ()
+  "Read mouse-hit list from keyboard.  Like (read 'read-char),
+but that uses minibuffer, and mucks up last-command."
+  (let ((char-list nil) (char nil))
+    (while (not (equal 13		; Carriage return.
+		       (prog1 (setq char (read-char)) 
+			 (setq char-list (cons char char-list))))))
+    (read (mapconcat 'char-to-string (nreverse char-list) ""))
+    ))
+
+;;; Second Click Hackery....
+;;; if prefix is not mouse-prefix, need a way to unread the char...
+;;; or else have mouse flush input queue, or else need a peek at next char.
+
+;;; There is no peek, but since one character can be unread, we only
+;;; have to flush the queue when the command after a mouse click
+;;; starts with mouse-prefix1 (see below).
+;;;   Something to do later:  We could buffer the read commands and
+;;; execute them ourselves after doing the mouse command (using
+;;; lookup-key ??).
+
+(defvar mouse-prefix1 24		; C-x
+  "First char of mouse-prefix.  Used to detect double clicks and chords.")
+
+(defvar mouse-prefix2 0			; C-@
+  "Second char of mouse-prefix.  Used to detect double clicks and chords.")
+
+
+(defun mouse-second-hit (hit-wait)
+  "Returns the next mouse hit occurring within HIT-WAIT milliseconds."
+  (if (sit-for-millisecs hit-wait) nil	; No input within hit-wait millisecs.
+    (let ((pc1 (read-char)))
+      (if (or (not (equal pc1 mouse-prefix1))
+	      (sit-for-millisecs 3))	; a mouse prefix will have second char
+	  ;; Can get away with one unread.
+	  (progn (setq unread-command-events (list pc1))
+		 nil)			; Next input not mouse event.
+	(let ((pc2 (read-char)))
+	  (if (not (equal pc2 mouse-prefix2))
+	      (progn (setq unread-command-events (list pc1)) ; put back the ^X
+;;; Too bad can't do two: (setq unread-command-event (list pc1 pc2))
+;;; Well, now we can, but I don't understand this code well enough to fix it...
+		(ding)			; user will have to retype that pc2.
+		nil)			; This input is not a mouse event.
+	    ;; Next input has mouse prefix and is within time limit.
+	    (let ((new-hit (mouse-hit-read))) ; Read the new hit.
+		(if (sm::hit-up-p new-hit)	; Ignore up events when timing.
+		    (mouse-second-hit (- hit-wait (sm::hit-delta new-hit)))
+		  new-hit		; New down hit within limit, return it.
+		  ))))))))
+
+(defun sm::window-xy (x y)
+  "Find window containing screen coordinates X and Y.
+Returns list (window x y) where x and y are relative to window."
+  (or
+   (catch 'found
+     (eval-in-windows 
+      (let ((we (window-edges (selected-window))))
+	(let ((le (nth 0 we))
+	      (te (nth 1 we))
+	      (re (nth 2 we))
+	      (be (nth 3 we)))
+	  (if (= re (frame-width))
+	      ;; include the continuation column with this window
+	      (setq re (1+ re)))
+	  (if (= be (frame-height))
+	      ;; include partial line at bottom of frame with this window
+	      ;; id est, if window is not multple of char size.
+	      (setq be (1+ be)))
+
+	  (if (and (>= x le) (< x re)
+		   (>= y te) (< y be))
+	      (throw 'found 
+		     (list (selected-window) (- x le) (- y te))))))
+      t))				; include minibuffer in eval-in-windows
+   ;;If x,y from a real mouse click, we shouldn't get here.
+   (list nil x y)
+   ))
+
+(defun sm::window-region (loc)
+  "Parse LOC into a region symbol.
+Returns one of (text scrollbar modeline minibuffer)"
+  (let ((w (sm::loc-w loc))
+	(x (sm::loc-x loc))
+	(y (sm::loc-y loc)))
+    (let ((right (1- (window-width w)))
+	  (bottom (1- (window-height w))))
+      (cond ((minibuffer-window-p w) 'minibuffer)
+	    ((>= y bottom) 'modeline)
+	    ((>= x right) 'scrollbar)
+	    ;; far right column (window separator) is always a scrollbar
+	    ((and scrollbar-width
+		  ;; mouse within scrollbar-width of edge.
+		  (>= x (- right scrollbar-width))
+		  ;; mouse a few chars past the end of line.
+		  (>= x (+ 2 (window-line-end w x y))))
+	     'scrollbar)
+	    (t 'text)))))
+
+(defun window-line-end (w x y)
+  "Return WINDOW column (ignore X) containing end of line Y"
+  (eval-in-window w (save-excursion (move-to-loc (frame-width) y))))
+
+;;;
+;;; The encoding of mouse events into a mousemap.
+;;; These values must agree with coding in emacstool:
+;;;
+(defconst sm::keyword-alist 
+  '((left . 1) (middle . 2) (right . 4)
+    (shift . 8) (control . 16) (meta . 32) (double . 64) (up . 128)
+    (text . 256) (scrollbar . 512) (modeline . 1024) (minibuffer . 2048)
+    ))
+
+(defun mouse-event-code (hit loc)
+  "Maps MOUSE-HIT and LOC into a mouse-code."
+;;;Region is a code for one of text, modeline, scrollbar, or minibuffer.
+  (logior (sm::hit-code hit)
+	  (mouse-region-to-code (sm::window-region loc))))
+
+(defun mouse-region-to-code (region)
+  "Returns partial mouse-code for specified REGION."
+  (cdr (assq region sm::keyword-alist)))
+
+(defun mouse-list-to-mouse-code (mouse-list)
+  "Map a MOUSE-LIST to a mouse-code."
+  (apply 'logior
+	 (mapcar (function (lambda (x)
+			     (cdr (assq x sm::keyword-alist))))
+		  mouse-list)))
+
+(defun mouse-code-to-mouse-list (mouse-code)
+  "Map a MOUSE-CODE to a mouse-list."
+  (apply 'nconc (mapcar
+		 (function (lambda (x)
+			     (if (logtest mouse-code (cdr x))
+				 (list (car x)))))
+		 sm::keyword-alist)))
+
+(defun mousemap-set (code mousemap value)
+  (let* ((alist (cdr mousemap))
+	 (assq-result (assq code alist)))
+    (if assq-result
+	(setcdr assq-result value)
+      (setcdr mousemap (cons (cons code value) alist)))))
+
+(defun mousemap-get (code mousemap)
+  (cdr (assq code (cdr mousemap))))
+
+(defun mouse-lookup (mouse-code)
+  "Look up MOUSE-EVENT and return the definition. nil means undefined."
+  (or (mousemap-get mouse-code current-local-mousemap)
+      (mousemap-get mouse-code current-global-mousemap)))
+
+;;;
+;;; I (jpeck) don't understand the utility of the next four functions
+;;; ask Steven Greenbaum <froud@kestrel>
+;;;
+(defun mouse-mask-lookup (mask list)
+  "Args MASK (a bit mask) and LIST (a list of (code . form) pairs).
+Returns a list of elements of LIST whose code or'ed with MASK is non-zero."
+  (let ((result nil))
+    (while list
+      (if (logtest mask (car (car list)))
+	  (setq result (cons (car list) result)))
+      (setq list (cdr list)))
+    result))
+
+(defun mouse-union (l l-unique)
+  "Return the union of list of mouse (code . form) pairs L and L-UNIQUE,
+where L-UNIQUE is considered to be union'ized already."
+  (let ((result l-unique))
+    (while l
+      (let ((code-form-pair (car l)))
+	(if (not (assq (car code-form-pair) result))
+	    (setq result (cons code-form-pair result))))
+      (setq l (cdr l)))
+    result))
+
+(defun mouse-union-first-preferred (l1 l2)
+  "Return the union of lists of mouse (code . form) pairs L1 and L2,
+based on the code's, with preference going to elements in L1."
+  (mouse-union l2 (mouse-union l1 nil)))
+
+(defun mouse-code-function-pairs-of-region (region)
+  "Return a list of (code . function) pairs, where each code is
+currently set in the REGION."
+  (let ((mask (mouse-region-to-code region)))
+    (mouse-union-first-preferred
+     (mouse-mask-lookup mask (cdr current-local-mousemap))
+     (mouse-mask-lookup mask (cdr current-global-mousemap))
+     )))
+
+;;;
+;;; Functions for DESCRIBE-MOUSE-BINDINGS
+;;; And other mouse documentation functions
+;;; Still need a good procedure to print out a help sheet in readable format.
+;;;
+
+(defun one-line-doc-string (function)
+  "Returns first line of documentation string for FUNCTION.
+If there is no documentation string, then the string
+\"No documentation\" is returned."
+  (while (consp function) (setq function (car function)))
+  (let ((doc (documentation function)))
+    (if (null doc)
+	"No documentation."
+      (string-match "^.*$" doc)
+      (substring doc 0 (match-end 0)))))
+
+(defun print-mouse-format (binding)
+  (princ (car binding))
+  (princ ": ")
+  (mapcar (function
+	   (lambda (mouse-list)
+	     (princ mouse-list)
+	     (princ " ")))
+	  (cdr binding))
+  (terpri)
+  (princ "  ")
+  (princ (one-line-doc-string (car binding)))
+  (terpri)
+  )
+
+(defun print-mouse-bindings (region)
+  "Prints mouse-event bindings for REGION."
+  (mapcar 'print-mouse-format (sm::event-bindings region)))
+
+(defun sm::event-bindings (region)
+  "Returns an alist of (function . (mouse-list1 ... mouse-listN)) for REGION,
+where each mouse-list is bound to the function in REGION."
+  (let ((mouse-bindings (mouse-code-function-pairs-of-region region))
+	(result nil))
+    (while mouse-bindings
+      (let* ((code-function-pair (car mouse-bindings))
+	     (current-entry (assoc (cdr code-function-pair) result)))
+	(if current-entry
+	    (setcdr current-entry
+		    (cons (mouse-code-to-mouse-list (car code-function-pair))
+			  (cdr current-entry)))
+	  (setq result (cons (cons (cdr code-function-pair)
+				   (list (mouse-code-to-mouse-list
+					  (car code-function-pair))))
+			     result))))
+      (setq mouse-bindings (cdr mouse-bindings))
+      )
+    result))
+
+(defun describe-mouse-bindings ()
+  "Lists all current mouse-event bindings."
+  (interactive)
+  (with-output-to-temp-buffer "*Help*"
+    (princ "Text Region") (terpri)
+    (princ "---- ------") (terpri)
+    (print-mouse-bindings 'text) (terpri)
+    (princ "Modeline Region") (terpri)
+    (princ "-------- ------") (terpri)
+    (print-mouse-bindings 'modeline) (terpri)
+    (princ "Scrollbar Region") (terpri)
+    (princ "--------- ------") (terpri)
+    (print-mouse-bindings 'scrollbar)))
+
+(defun describe-mouse-briefly (mouse-list)
+  "Print a short description of the function bound to MOUSE-LIST."
+  (interactive "xDescibe mouse list briefly: ")
+  (let ((function (mouse-lookup (mouse-list-to-mouse-code mouse-list))))
+    (if function
+	(message "%s runs the command %s" mouse-list function)
+      (message "%s is undefined" mouse-list))))
+
+(defun mouse-help-menu (function-and-binding)
+  (cons (prin1-to-string (car function-and-binding))
+	(menu-create	; Two sub-menu items of form ("String" . nil)
+	 (list (list (one-line-doc-string (car function-and-binding)))
+	       (list (prin1-to-string (cdr function-and-binding)))))))
+
+(defun mouse-help-region (w x y &optional region)
+  "Displays a menu of mouse functions callable in this region."
+  (let* ((region (or region (sm::window-region (list w x y))))
+	 (mlist (mapcar (function mouse-help-menu)
+			(sm::event-bindings region)))
+	 (menu (menu-create (cons (list (symbol-name region)) mlist)))
+	 (item (sun-menu-evaluate w 0 y menu))
+	 )))
+
+;;;
+;;; Menu interface functions
+;;;
+;;; use defmenu, because this interface is subject to change
+;;; really need a menu-p, but we use vectorp and the context...
+;;;
+(defun menu-create (items)
+  "Functional form for defmenu, given a list of ITEMS returns a menu.
+Each ITEM is a (STRING . VALUE) pair."
+  (apply 'vector items)
+  )
+
+(defmacro defmenu (menu &rest itemlist)
+  "Defines MENU to be a menu, the ITEMS are (STRING . VALUE) pairs.
+See sun-menu-evaluate for interpretation of ITEMS."
+  (list 'defconst menu (funcall 'menu-create itemlist))
+  )
+
+(defun sun-menu-evaluate (*menu-window* *menu-x* *menu-y* menu)
+  "Display a pop-up menu in WINDOW at X Y and evaluate selected item
+of MENU.  MENU (or its symbol-value) should be a menu defined by defmenu.
+  A menu ITEM is a (STRING . FORM) pair;
+the FORM associated with the selected STRING is evaluated,
+and the resulting value is returned.  Generally these FORMs are
+evaluated for their side-effects rather than their values.
+  If the selected form is a menu or a symbol whose value is a menu, 
+then it is displayed and evaluated as a pullright menu item.
+  If the the FORM of the first ITEM is nil, the STRING of the item
+is used as a label for the menu, i.e. it's inverted and not selectable."
+
+  (if (symbolp menu) (setq menu (symbol-value menu)))
+  (eval (sun-menu-internal *menu-window* *menu-x* *menu-y* 4 menu)))
+
+(defun sun-get-frame-data (code)
+  "Sends the tty-sub-window escape sequence CODE to terminal,
+and returns a cons of the two numbers in returned escape sequence.
+That is it returns (cons <car> <cdr>) from \"\\E[n;<car>;<cdr>t\". 
+CODE values: 13 = Tool-Position, 14 = Size-in-Pixels, 18 = Size-in-Chars."
+  (send-string-to-terminal (concat "\033[" (int-to-string code) "t"))
+  (let (char str x y)
+    (while (not (equal 116 (setq char (read-char)))) ; #\t = 116
+      (setq str (cons char str)))
+    (setq str (mapconcat 'char-to-string (nreverse str) ""))
+    (string-match ";[0-9]*" str)
+    (setq y (substring str (1+ (match-beginning 0)) (match-end 0)))
+    (setq str (substring str (match-end 0)))
+    (string-match ";[0-9]*" str)
+    (setq x (substring str (1+ (match-beginning 0)) (match-end 0)))
+    (cons (string-to-int y) (string-to-int x))))
+
+(defun sm::font-size ()
+  "Returns font size in pixels: (cons Ysize Xsize)"
+  (let ((pix (sun-get-frame-data 14))	; returns size in pixels
+	(chr (sun-get-frame-data 18)))	; returns size in chars
+    (cons (/ (car pix) (car chr)) (/ (cdr pix) (cdr chr)))))
+
+(defvar sm::menu-kludge-x nil 
+  "Cached frame-to-window X-Offset for sm::menu-kludge")
+(defvar sm::menu-kludge-y nil 
+  "Cached frame-to-window Y-Offset for sm::menu-kludge")
+
+(defun sm::menu-kludge ()
+  "If sunfns.c uses <Menu_Base_Kludge> this function must be here!"
+  (or sm::menu-kludge-y
+      (let ((fs (sm::font-size)))
+	(setq sm::menu-kludge-y (+ 8 (car fs))	; a title line and borders
+	      sm::menu-kludge-x 4)))	; best values depend on .defaults/Menu
+  (let ((wl (sun-get-frame-data 13)))		; returns frame location
+    (cons (+ (car wl) sm::menu-kludge-y)
+	  (+ (cdr wl) sm::menu-kludge-x))))
+
+;;;
+;;;  Function interface to selection/region
+;;;  primitive functions are defined in sunfns.c
+;;;
+(defun sun-yank-selection ()
+  "Set mark and yank the contents of the current sunwindows selection.
+Insert contents into the current buffer at point."
+  (interactive "*")
+  (set-mark-command nil)
+  (insert-string (sun-get-selection)))
+
+(defun sun-select-region (beg end)
+  "Set the sunwindows selection to the region in the current buffer."
+  (interactive "r")
+  (sun-set-selection (buffer-substring beg end)))
+
+;;;
+;;; Support for emacstool
+;;; This closes the window instead of stopping emacs.
+;;;
+(defun suspend-emacstool (&optional stuffstring)
+  "Suspend emacstool.
+If running under as a detached process emacstool,
+you don't want to suspend  (there is no way to resume), 
+just close the window, and wait for reopening."
+  (interactive)
+  (run-hooks 'suspend-hook)
+  (if stuffstring (send-string-to-terminal stuffstring))
+  (send-string-to-terminal "\033[2t")	; To close EmacsTool window.
+  (run-hooks 'suspend-resume-hook))
+;;;
+;;; initialize mouse maps
+;;;
+
+(make-variable-buffer-local 'current-local-mousemap)
+(setq-default current-local-mousemap nil)
+(defvar current-global-mousemap (make-mousemap))
+
+(provide 'sun-mouse)
+
+;;; sun-mouse.el ends here