Nebula 2/Nebula Two.iso/Apps/EmacsTeX/Emacs-3.0.1/Source/lisp/eterm-fns.el

Text File | 1995-06-12 | 18.8 KB | 538 lines

;; Subroutines of Mouse handling for NeXT "Emacs" front end
;; Ripped off of the Sun windows support code
;; Copyright (C) 1987 Free Software Foundation, Inc.

;; This file is NOT part of the standard GNU Emacs distribution.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY.  No author or distributor
;; accepts responsibility to anyone for the consequences of using it
;; or for whether it serves any particular purpose or works at all,
;; unless he says so in writing.  Refer to the GNU Emacs General Public
;; License for full details.

;; Everyone is granted permission to copy, modify and redistribute
;; GNU Emacs, but only under the conditions described in the
;; GNU Emacs General Public License.   A copy of this license is
;; supposed to have been given to you along with GNU Emacs so you
;; can know your rights and responsibilities.  It should be in a
;; file named COPYING.  Among other things, the copyright notice
;; and this notice must be preserved on all copies.

;;; Apr 4 '90 jgm    Ripped off of sun-fns.el
;;(provide 'eterm-fns)
;;(require 'eterm-mouse)
;;;
;;; Functions for manipulating via the mouse and mouse-map definitions
;;; for accessing them.  Also definitons of mouse menus.
;;; This file you should freely modify to reflect you personal tastes.
;;;
;;; First half of file defines functions to implement mouse commands,
;;; Don't delete any of those, just add what ever else you need.
;;; Second half of file defines mouse bindings, do whatever you want there.

;;;
;;;         Mouse Functions.
;;;
;;; These functions follow the eterm-mouse-handler convention of being called
;;; with three arguements: (window x-pos y-pos)
;;; This makes it easy for a mouse executed command to know where the mouse is.
;;; Use the macro "eval-in-window" to execute a function
;;; in a temporarily selected window.
;;;
;;; If you have a function that must be called with other arguments
;;; bind the mouse button to an s-exp that contains the necessary parameters.
;;; See "minibuffer" bindings for examples.
;;;
(defconst cursor-pause-milliseconds 300
  "*Number of milliseconds to display alternate cursor (usually the mark)")

(defun indicate-region (&optional pause)
  "Bounce cursor to mark for cursor-pause-milliseconds and back again"
  (or pause (setq pause cursor-pause-milliseconds))
  (let ((times 0))
    (exchange-point-and-mark)
    (if (fboundp 'sit-for-millisecs)
    (sit-for-millisecs pause)
      (sit-for 1))
    (exchange-point-and-mark)))

;      (while (< times 20)
;    (sit-for 0)
;    (setq times (1+ times))))


;;;
;;; Text buffer operations
;;;
(defun mouse-move-point (window x y)
  "Move point to mouse cursor."
  (select-window window)
  (move-to-loc x y)
  (if (memq last-command    ; support the mouse-copy/delete/yank
        '(mouse-copy mouse-delete mouse-yank-move))
      (setq this-command 'mouse-yank-move))
  )

(defun mouse-set-mark (window x y)
  "Set mark at mouse cursor."
  (eval-in-window window    ;; use this to get the unwind protect
    (let ((point (point)))
      (move-to-loc x y)
      (set-mark (point))
      (goto-char point)
      (indicate-region)))
  )

(defun mouse-set-mark-and-select (window x y)
  "Set mark at mouse cursor, and select that window."
  (select-window window)
  (mouse-set-mark window x y)
  )

;;;
;;; Simple mouse dragging stuff: marking with button up
;;;

(defvar *mouse-drag-window* nil)
(defvar *mouse-drag-x* -1)
(defvar *mouse-drag-y* -1)

(defun mouse-drag-move-point (window x y)
  "Move point to mouse cursor, and allow dragging."
  (mouse-move-point window x y)
  (setq *mouse-drag-window* window
    *mouse-drag-x* x
    *mouse-drag-y* y))

(defun mouse-drag-set-mark (window x y)
  "The up click handler that goes with mouse-drag-move-point.
If mouse is in same WINDOW but at different X or Y than when
mouse-drag-move-point was last executed, set the mark at mouse."
  (if (and (eq *mouse-drag-window* window)
       (not (and (equal *mouse-drag-x* x)
             (equal *mouse-drag-y* y))))
      (mouse-set-mark-and-select window x y)
    (setq this-command last-command))    ; this was just an upclick no-op.
  )

(defun mouse-select-or-drag-move-point (window x y)
  "Select window if not selected, otherwise do mouse-drag-move-point."
  (if (eq (selected-window) window)
      (mouse-drag-move-point window x y)
    (mouse-select-window window x y)))

;;;
;;; esoteria:
;;;
(defun mouse-exch-pt-and-mark (window x y)
  "Exchange point and mark."
  (select-window window)
  (exchange-point-and-mark)
  )

(defun mouse-call-kbd-macro (window x y)
  "Invokes last keyboard macro at mouse cursor."
  (mouse-move-point window x y)
  (call-last-kbd-macro)
  )

(defun mouse-mark-thing (window x y)
  "Set point and mark to text object using syntax table.
The resulting region is put in the NeXT pasteboard.
Left or right Paren syntax marks an s-expression.
Clicking at the end of a line marks the line including a trailing newline.
If it doesn't recognize one of these it marks the character at point."
  (mouse-move-point window x y)
  (if (eobp) (open-line 1))
  (let* ((char (char-after (point)))
         (syntax (char-syntax char)))
    (cond
     ((eq syntax ?w)            ; word.
      (forward-word 1)
      (set-mark (point))
      (forward-word -1))
     ;; try to include a single following whitespace (is this a good idea?)
     ;; No, not a good idea since inconsistent.
     ;;(if (eq (char-syntax (char-after (mark))) ?\ )
     ;;    (set-mark (1+ (mark))))
     ((eq syntax ?\( )            ; open paren.
      (mark-sexp 1))
     ((eq syntax ?\) )            ; close paren.
      (forward-char 1)
      (mark-sexp -1)
      (exchange-point-and-mark))
     ((eolp)                ; mark line if at end.
      (set-mark (1+ (point)))
      (beginning-of-line 1))
     (t                    ; mark character
      (set-mark (1+ (point)))))
    (indicate-region))            ; display region boundary.
  )

(defun mouse-kill-thing (window x y)
  "Kill thing at mouse, and put point there."
  (mouse-mark-thing window x y)
  (eterm-send-region-to-cut-buffer-and-wipe (region-beginning) (region-end))
  )

(defun mouse-kill-thing-there (window x y)
  "Kill thing at mouse, leave point where it was.
See mouse-mark-thing for a description of the objects recognized."
  (eval-in-window window
    (save-excursion
      (mouse-mark-thing window x y)
      (eterm-send-region-to-cut-buffer-and-wipe (region-beginning) (region-end))))
  )

(defun mouse-save-thing (window x y &optional quiet)
  "Put thing at mouse in kill ring.
See mouse-mark-thing for a description of the objects recognized."
  (mouse-mark-thing window x y)
  (eterm-send-region-to-cut-buffer (region-beginning) (region-end))
  (if (not quiet) (message "Thing saved"))
  )

(defun mouse-save-thing-there (window x y &optional quiet)
  "Put thing at mouse in kill ring, leave point as is.
See mouse-mark-thing for a description of the objects recognized."
  (eval-in-window window
    (save-excursion
      (mouse-save-thing window x y quiet))))

;;;
;;; Mouse yanking...
;;;
(defun mouse-copy-thing (window x y)
  "Put thing at mouse in kill ring, yank to point.
See mouse-mark-thing for a description of the objects recognized."
  (setq last-command 'not-kill)     ;Avoids appending to previous kills.
  (mouse-save-thing-there window x y t)
  (yank)
  (setq this-command 'yank))

(defun mouse-move-thing (window x y)
  "Kill thing at mouse, yank it to point.
See mouse-mark-thing for a description of the objects recognized."
  (setq last-command 'not-kill)     ;Avoids appending to previous kills.
  (mouse-kill-thing-there window x y)
  (yank)
  (setq this-command 'yank))

(defun mouse-yank-at-point (&optional window x y)
  "Yank from kill-ring at point; then cycle thru kill ring."
  (if (eq last-command 'yank)
      (let ((before (< (point) (mark))))
    (delete-region (point) (mark))
    (rotate-yank-pointer 1)
    (insert (car kill-ring-yank-pointer))
    (if before (exchange-point-and-mark)))
    (yank))
  (setq this-command 'yank))

(defun mouse-yank-at-mouse (window x y)
  "Yank from kill-ring at mouse; then cycle thru kill ring."
  (mouse-move-point window x y)
  (mouse-yank-at-point window x y))

(defun mouse-save/delete/yank (&optional window x y)
  "Context sensitive save/delete/yank.
Consecutive clicks perform as follows:
    * first click saves region to kill ring,
    * second click kills region,
    * third click yanks from kill ring,
    * subsequent clicks cycle thru kill ring.
If mouse-move-point is performed after the first or second click,
the next click will do a yank, etc.  Except for a possible mouse-move-point,
this command is insensitive to mouse location."
  (cond
   ((memq last-command '(mouse-delete yank mouse-yank-move))    ; third+ click
    (mouse-yank-at-point))
   ((eq last-command 'mouse-copy)    ; second click
    (kill-region (region-beginning) (region-end))
    (setq this-command 'mouse-delete))
   (t                    ; first click
    (copy-region-as-kill (region-beginning) (region-end))
    (message "Region saved")
    (setq this-command 'mouse-copy))
   ))


(defun mouse-split-horizontally (window x y)
  "Splits the window horizontally at mouse cursor."
  (eval-in-window window (split-window-horizontally (1+ x))))

(defun mouse-split-vertically (window x y)
  "Split the window vertically at the mouse cursor."
  (eval-in-window window (split-window-vertically (1+ y))))

(defun mouse-select-window (window x y)
  "Selects the window, restoring point."
  (select-window window))

(defun mouse-delete-other-windows (window x y)
  "Deletes all windows except the one mouse is in."
  (delete-other-windows window))

(defun mouse-delete-window (window x y)
  "Deletes the window mouse is in."
  (delete-window window))

(defun mouse-undo (window x y)
  "Invokes undo in the window mouse is in."
  (eval-in-window window (undo)))

;;;
;;; Scroll operations
;;;

;;; The move-to-window-line is used below because otherwise
;;; scrolling a non-selected process window with the mouse, after
;;; the process has written text past the bottom of the window,
;;; gives an "End of buffer" error, and then scrolls.  The
;;; move-to-window-line seems to force recomputing where things are.
(defun mouse-scroll-up (window x y)
  "Scrolls the window upward."
  (eval-in-window window (move-to-window-line 1) (scroll-up nil)))

(defun mouse-scroll-down (window x y)
  "Scrolls the window downward."
  (eval-in-window window (scroll-down nil)))

(defun mouse-scroll-proportional (window x y)
  "Scrolls the window proportionally corresponding to window
relative X divided by window width."
  (eval-in-window window
    (if (>= x (1- (window-width)))
    ;; When x is maximun (equal to or 1 less than window width),
    ;; goto end of buffer.  We check for this special case
    ;; becuase the calculated goto-char often goes short of the
    ;; end due to roundoff error, and we often really want to go
    ;; to the end.
    (goto-char (point-max))
      (progn
    (goto-char (+ (point-min)    ; For narrowed regions.
              (* x (/ (- (point-max) (point-min))
                  (1- (window-width))))))
    (beginning-of-line))
      )
    (what-cursor-position)        ; Report position.
    ))

(defun mouse-line-to-top (window x y)
  "Scrolls the line at the mouse cursor up to the top."
  (eval-in-window window (scroll-up y)))

(defun mouse-top-to-line (window x y)
  "Scrolls the top line down to the mouse cursor."
  (eval-in-window window (scroll-down y)))

(defun mouse-line-to-bottom (window x y)
  "Scrolls the line at the mouse cursor to the bottom."
  (eval-in-window window (scroll-up (+ y (- 2 (window-height))))))

(defun mouse-bottom-to-line (window x y)
  "Scrolls the bottom line up to the mouse cursor."
  (eval-in-window window (scroll-down (+ y (- 2 (window-height))))))

(defun mouse-line-to-middle (window x y)
  "Scrolls the line at the mouse cursor to the middle."
  (eval-in-window window (scroll-up (- y -1 (/ (window-height) 2)))))

(defun mouse-middle-to-line (window x y)
  "Scrolls the line at the middle to the mouse cursor."
  (eval-in-window window (scroll-up (- (/ (window-height) 2) y 1))))



;;;
;;; minibuffer
;;;
(defun mini-move-point (window x y)
  ;; -6 is good for most common cases
  (mouse-move-point window (- x 6) 0))

(defun mini-set-mark-and-select (window x y)
  ;; -6 is good for most common cases
  (mouse-set-mark-and-select window (- x 6) 0))


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Buffer-mode Mouse commands
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(defun Buffer-at-mouse (w x y)
  "Calls Buffer-menu-buffer from mouse click."
  (save-window-excursion
    (mouse-move-point w x y)
    (beginning-of-line)
    (Buffer-menu-buffer t)))

(defun mouse-buffer-bury (w x y)
  "Bury the indicated buffer."
  (bury-buffer (Buffer-at-mouse w x y))
  )

(defun mouse-buffer-select (w x y)
  "Put the indicated buffer in selected window."
  (switch-to-buffer (Buffer-at-mouse w x y))
  (list-buffers)
  )

(defun mouse-buffer-delete (w x y)
  "mark indicated buffer for delete"
  (save-window-excursion
    (mouse-move-point w x y)
    (Buffer-menu-delete)
    ))

(defun mouse-buffer-execute (w x y)
  "execute buffer-menu selections"
  (save-window-excursion
    (mouse-move-point w x y)
    (Buffer-menu-execute)
    ))

(defun enable-mouse-in-buffer-list ()
  "Call this to enable mouse selections in *Buffer List*
    LEFT puts the indicated buffer in the selected window.
    SHIFT-LEFT buries the indicated buffer.
    RIGHT marks the indicated buffer for deletion.
    SHIFT-RIGHT deletes the marked buffers.
To unmark a buffer marked for deletion, select it with LEFT."
  (save-window-excursion
    (list-buffers)            ; Initialize *Buffer List*
    (set-buffer "*Buffer List*")
    (local-set-mouse '(text shift left) 'mouse-buffer-bury)
    (local-set-mouse '(text left) 'mouse-buffer-select)
    (local-set-mouse '(text right) 'mouse-buffer-delete)
    (local-set-mouse '(text shift right) 'mouse-buffer-execute)
    )
  )


;;;*******************************************************************
;;;
;;;           Global Mouse Bindings.
;;;
;;; There is some sense to this mouse binding madness:
;;; LEFT and RIGHT scrolls are inverses.
;;; SHIFT makes an opposite meaning in the scroll bar.
;;; META makes the scrollbar functions work in the text region.
;;; RIGHT operates the mark
;;; LEFT operates at point

;;; META commands are generally non-destructive,
;;; SHIFT is a little more dangerous.
;;; CONTROL is for the really complicated ones.

;;; CONTROL-META-SHIFT-RIGHT gives help on that region.
;;; (or so it would if I had time to implement it --jgm)

;;;
;;; Text Region mousemap
;;;
;; The basics: Point, Mark, Menu, Sun-Select:
(global-set-mouse '(text        left)    'mouse-drag-move-point)
(global-set-mouse '(text     up left)    'mouse-drag-set-mark)
(global-set-mouse '(text shift  left)    'mouse-exch-pt-and-mark)

(global-set-mouse '(text    right)    'mouse-set-mark-and-select)

;; The Slymoblics multi-command for Save, Kill, Copy, Move:
(global-set-mouse '(text shift    right)    'mouse-save/delete/yank)

;; Save, Kill, Copy, Move Things:
;; control-left composes with control middle/right to produce copy/move
(global-set-mouse '(text control right        )    'mouse-save-thing-there)
;(global-set-mouse '(text control right      )    'mouse-kill-thing-there)
(global-set-mouse '(text control     left)    'mouse-yank-at-point)

;(global-set-mouse '(text control middle    left)    'mouse-copy-thing)
;(global-set-mouse '(text control right    left)    'mouse-move-thing)
;(global-set-mouse '(text control right middle)    'mouse-mark-thing)

;; The Universal mouse help command (press all buttons):
;(global-set-mouse '(text shift  control meta right)    'mouse-help-region)

;;; Meta in Text Region is like meta version in scrollbar:
(global-set-mouse '(text meta        left)    'mouse-line-to-top)
(global-set-mouse '(text meta shift  left)    'mouse-line-to-bottom)
;(global-set-mouse '(text meta         middle)    'mouse-line-to-middle)
;(global-set-mouse '(text meta shift   middle)    'mouse-middle-to-line)
;(global-set-mouse '(text meta control middle)    'mouse-split-vertically)
(global-set-mouse '(text meta        right)    'mouse-top-to-line)
(global-set-mouse '(text meta shift  right)    'mouse-bottom-to-line)

;; Miscellaneous:
(global-set-mouse '(text meta control left)    'mouse-call-kbd-macro)
(global-set-mouse '(text meta control right)    'mouse-undo)

;;;
;;; Scrollbar mousemap.
;;; Are available in the Scrollbar Region, or with Meta Text (or Meta Scrollbar)
;;;
(global-set-mouse '(scrollbar        left)    'mouse-line-to-top)
(global-set-mouse '(scrollbar shift  left)    'mouse-line-to-bottom)

;(global-set-mouse '(scrollbar         middle)    'mouse-line-to-middle)
;(global-set-mouse '(scrollbar shift   middle)    'mouse-middle-to-line)
;(global-set-mouse '(scrollbar control middle)    'mouse-split-vertically)

(global-set-mouse '(scrollbar        right)    'mouse-top-to-line)
(global-set-mouse '(scrollbar shift  right)    'mouse-bottom-to-line)

(global-set-mouse '(scrollbar meta        left)        'mouse-line-to-top)
(global-set-mouse '(scrollbar meta shift  left)        'mouse-line-to-bottom)
;(global-set-mouse '(scrollbar meta         middle)    'mouse-line-to-middle)
;(global-set-mouse '(scrollbar meta shift   middle)    'mouse-middle-to-line)
;(global-set-mouse '(scrollbar meta control middle)    'mouse-split-vertically)
(global-set-mouse '(scrollbar meta        right)    'mouse-top-to-line)
(global-set-mouse '(scrollbar meta shift  right)    'mouse-bottom-to-line)

;; And the help menu:
;(global-set-mouse '(scrollbar shift  control meta right) 'mouse-help-region)

;;;
;;; Modeline mousemap.
;;;
;;; Note: meta of any single button selects window.

(global-set-mouse '(modeline      left)    'mouse-scroll-up)
(global-set-mouse '(modeline meta left)    'mouse-select-window)

;(global-set-mouse '(modeline         middle)    'mouse-scroll-proportional)
;(global-set-mouse '(modeline meta    middle)    'mouse-select-window)
;(global-set-mouse '(modeline control middle)    'mouse-split-horizontally)

(global-set-mouse '(modeline      right)    'mouse-scroll-down)
(global-set-mouse '(modeline meta right)    'mouse-select-window)

;;; control-left selects this window, control-right deletes it.
(global-set-mouse '(modeline control left)    'mouse-delete-other-windows)
(global-set-mouse '(modeline control right)    'mouse-delete-window)

;; in case of confusion, just select it:
(global-set-mouse '(modeline control left right)'mouse-select-window)

;; even without confusion (and without the keyboard) select it:
(global-set-mouse '(modeline left right)    'mouse-select-window)

;; And the help menu:
;(global-set-mouse '(modeline shift  control meta right)    'mouse-help-region)

;;;
;;; Minibuffer Mousemap
;;; Demonstrating some variety:
;;;
(global-set-mouse '(minibuffer left)        'mini-move-point)
(global-set-mouse '(minibuffer right)    'mini-set-mark-and-select)

(global-set-mouse '(minibuffer shift   left) '(previous-complex-command 1))
(global-set-mouse '(minibuffer control left) '(next-complex-command 1))

(global-set-mouse '(minibuffer shift   right) '(next-complex-command 1))
(global-set-mouse '(minibuffer control right) '(previous-complex-command 1))

;(global-set-mouse '(minibuffer shift  control meta right)  'mouse-help-region)