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;; Calculator for GNU Emacs, part II [calc-trail.el]
;; Copyright (C) 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
;; Written by Dave Gillespie, daveg@synaptics.com.
;; This file is part of GNU Emacs.
;; 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.
;; This file is autoloaded from calc-ext.el.
(require 'calc-ext)
(require 'calc-macs)
(defun calc-Need-calc-trail () nil)
;;; Trail commands.
(defun calc-trail-in ()
(interactive)
(let ((win (get-buffer-window (calc-trail-display t))))
(and win (select-window win)))
)
(defun calc-trail-out ()
(interactive)
(calc-select-buffer)
(let ((win (get-buffer-window (current-buffer))))
(if win
(progn
(select-window win)
(calc-align-stack-window))
(calc)))
)
(defun calc-trail-next (n)
(interactive "p")
(calc-with-trail-buffer
(forward-line n)
(calc-trail-here))
)
(defun calc-trail-previous (n)
(interactive "p")
(calc-with-trail-buffer
(forward-line (- n))
(calc-trail-here))
)
(defun calc-trail-first (n)
(interactive "p")
(calc-with-trail-buffer
(goto-char (point-min))
(forward-line n)
(calc-trail-here))
)
(defun calc-trail-last (n)
(interactive "p")
(calc-with-trail-buffer
(goto-char (point-max))
(forward-line (- n))
(calc-trail-here))
)
(defun calc-trail-scroll-left (n)
(interactive "P")
(let ((curwin (selected-window)))
(calc-with-trail-buffer
(unwind-protect
(progn
(select-window (get-buffer-window (current-buffer)))
(calc-scroll-left n))
(select-window curwin))))
)
(defun calc-trail-scroll-right (n)
(interactive "P")
(let ((curwin (selected-window)))
(calc-with-trail-buffer
(unwind-protect
(progn
(select-window (get-buffer-window (current-buffer)))
(calc-scroll-right n))
(select-window curwin))))
)
(defun calc-trail-forward (n)
(interactive "p")
(calc-with-trail-buffer
(forward-line (* n (1- (window-height))))
(calc-trail-here))
)
(defun calc-trail-backward (n)
(interactive "p")
(calc-with-trail-buffer
(forward-line (- (* n (1- (window-height)))))
(calc-trail-here))
)
(defun calc-trail-isearch-forward ()
(interactive)
(calc-with-trail-buffer
(save-window-excursion
(select-window (get-buffer-window (current-buffer)))
(let ((search-exit-char ?\r))
(isearch-forward)))
(calc-trail-here))
)
(defun calc-trail-isearch-backward ()
(interactive)
(calc-with-trail-buffer
(save-window-excursion
(select-window (get-buffer-window (current-buffer)))
(let ((search-exit-char ?\r))
(isearch-backward)))
(calc-trail-here))
)
(defun calc-trail-yank (arg)
(interactive "P")
(calc-wrapper
(or arg (calc-set-command-flag 'hold-trail))
(calc-enter-result 0 "yank"
(calc-with-trail-buffer
(if arg
(forward-line (- (prefix-numeric-value arg))))
(if (or (looking-at "Emacs Calc")
(looking-at "----")
(looking-at " ? ? ?[^ \n]* *$")
(looking-at "..?.?$"))
(error "Can't yank that line"))
(if (looking-at ".*, \\.\\.\\., ")
(error "Can't yank (vector was abbreviated)"))
(forward-char 4)
(search-forward " ")
(let* ((next (save-excursion (forward-line 1) (point)))
(str (buffer-substring (point) (1- next)))
(val (save-excursion
(set-buffer save-buf)
(math-read-plain-expr str))))
(if (eq (car-safe val) 'error)
(error "Can't yank that line: %s" (nth 2 val))
val)))))
)
(defun calc-trail-marker (str)
(interactive "sText to insert in trail: ")
(calc-with-trail-buffer
(forward-line 1)
(let ((buffer-read-only nil))
(insert "---- " str "\n"))
(forward-line -1)
(calc-trail-here))
)
(defun calc-trail-kill (n)
(interactive "p")
(calc-with-trail-buffer
(let ((buffer-read-only nil))
(save-restriction
(narrow-to-region ; don't delete "Emacs Trail" header
(save-excursion
(goto-char (point-min))
(forward-line 1)
(point))
(point-max))
(kill-line n)))
(calc-trail-here))
)
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