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470 lines
21 KiB
EmacsLisp
470 lines
21 KiB
EmacsLisp
;;; tpu-doc.el --- Documentation for TPU-edt
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;; Copyright (C) 1993, 1994 Free Software Foundation, Inc.
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;; Author: Rob Riepel <riepel@networking.stanford.edu>
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;; Maintainer: Rob Riepel <riepel@networking.stanford.edu>
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;; Keywords: emulations
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;; This is documentation for the TPU-edt editor for GNU emacs. Major
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;; sections of this document are separated with lines that begin with
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;; ";; %% <topic>", where <topic> is what is discussed in that section.
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;; %% Contents
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;; % Introduction
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;; % Terminal Support
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;; % X-windows Support
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;; % Differences Between TPU-edt and the Real Thing
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;; % Starting TPU-edt
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;; % TPU-edt Default Editing Keypad, Control and Gold Key Bindings
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;; % Optional TPU-edt Extensions
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;; % Customizing TPU-edt using the Emacs Initialization File
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;; % Compiling TPU-edt
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;; % Regular expressions in TPU-edt
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;; % Etcetera
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;; %% Introduction
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;; TPU-edt is based on tpu.el by Jeff Kowalski and Bob Covey. TPU-edt
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;; endeavors to be even more like TPU's EDT emulation than the original
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;; tpu.el. Considerable effort has been expended to that end. Still,
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;; emacs is emacs and there are differences between TPU-edt and the
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;; real thing. Please read the "Differences Between TPU-edt and the
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;; Real Thing" and "Starting TPU-edt" sections before running TPU-edt.
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;; %% Terminal Support
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;; TPU-edt, like it's VMS cousin, works on VT-series terminals with
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;; DEC style keyboards. VT terminal emulators, including xterm with
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;; the appropriate key translations, work just fine too.
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;; %% X-windows Support
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;; Starting with version 19 of emacs, TPU-edt works with X-windows.
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;; This is accomplished through a TPU-edt X keymap. The emacs lisp
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;; program tpu-mapper.el creates this map and stores it in a file.
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;; Tpu-mapper will be run automatically the first time you invoke
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;; the X-windows version of emacs, or you can run it by hand. See
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;; the commentary in tpu-mapper.el for details.
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;; %% Differences Between TPU-edt and the Real Thing (not Coke (r))
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;; Emacs (version 18.58) doesn't support text highlighting, so selected
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;; regions are not shown in inverse video. Emacs uses the concept of
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;; "the mark". The mark is set at one end of a selected region; the
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;; cursor is at the other. The letter "M" appears in the mode line
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;; when the mark is set. The native emacs command ^X^X (Control-X
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;; twice) exchanges the cursor with the mark; this provides a handy
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;; way to find the location of the mark.
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;; In TPU the cursor can be either bound or free. Bound means the
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;; cursor cannot wander outside the text of the file being edited.
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;; Free means the arrow keys can move the cursor past the ends of
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;; lines. Free is the default mode in TPU; bound is the only mode
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;; in EDT. Bound is the only mode in the base version of TPU-edt;
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;; optional extensions add an approximation of free mode.
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;; Like TPU, emacs uses multiple buffers. Some buffers are used to
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;; hold files you are editing; other "internal" buffers are used for
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;; emacs' own purposes (like showing you help). Here are some commands
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;; for dealing with buffers.
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;; Gold-B moves to next buffer, including internal buffers
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;; Gold-N moves to next buffer containing a file
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;; Gold-M brings up a buffer menu (like TPU "show buffers")
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;; Emacs is very fond of throwing up new windows. Dealing with all
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;; these windows can be a little confusing at first, so here are a few
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;; commands to that may help:
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;; Gold-Next_Scr moves to the next window on the screen
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;; Gold-Prev_Scr moves to the previous window on the screen
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;; Gold-TAB also moves to the next window on the screen
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;; Control-x 1 deletes all but the current window
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;; Control-x 0 deletes the current window
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;; Note that the buffers associated with deleted windows still exist!
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;; Like TPU, TPU-edt has a "command" function, invoked with Gold-KP7 or
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;; Do. Most of the commands available are emacs commands. Some TPU
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;; commands are available, they are: replace, exit, quit, include, and
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;; Get (unfortunately, "get" is an internal emacs function, so we are
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;; stuck with "Get" - to make life easier, Get is available as Gold-g).
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;; Support for recall of commands, file names, and search strings was
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;; added to emacs in version 19. For version 18 of emacs, optional
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;; extensions are available to add this recall capability (see "Optional
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;; TPU-edt Extensions" below). The history of strings recalled in both
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;; versions of emacs differs slightly from TPU/edt, but it is still very
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;; convenient.
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;; Help is available! The traditional help keys (Help and PF2) display
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;; a three page help file showing the default keypad layout, control key
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;; functions, and Gold key functions. Pressing any key inside of help
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;; splits the screen and prints a description of the function of the
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;; pressed key. Gold-PF2 invokes the native emacs help, with it's
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;; zillions of options. Gold-Help shows all the current key bindings.
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;; Thanks to emacs, TPU-edt has some extensions that may make your life
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;; easier, or at least more interesting. For example, Gold-r toggles
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;; TPU-edt rectangular mode. In rectangular mode, Remove and Insert work
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;; on rectangles. Likewise, Gold-* toggles TPU-edt regular expression
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;; mode. In regular expression mode Find, Find Next, and the line-mode
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;; replace command work with regular expressions. [A regular expression
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;; is a pattern that denotes a set of strings; like VMS wildcards.]
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;; Emacs also gives TPU-edt the undo and occur functions. Undo does
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;; what it says; it undoes the last change. Multiple undos in a row
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;; undo multiple changes. For your convenience, undo is available on
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;; Gold-u. Occur shows all the lines containing a specific string in
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;; another window. Moving to that window, and typing ^C^C (Control-C
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;; twice) on a particular line moves you back to the original window
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;; at that line. Occur is on Gold-o.
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;; Finally, as you edit, remember that all the power of emacs is at
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;; your disposal. It really is a fantastic tool. You may even want to
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;; take some time and read the emacs tutorial; perhaps not to learn the
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;; native emacs key bindings, but to get a feel for all the things
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;; emacs can do for you. The emacs tutorial is available from the
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;; emacs help function: "Gold-PF2 t"
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;; %% Starting TPU-edt
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;; In order to use TPU-edt, the TPU-edt editor definitions, contained
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;; in tpu-edt.el, need to be loaded when emacs is run. This can be
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;; done in a couple of ways. The first is by explicitly requesting
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;; loading of the TPU-edt emacs definition file on the command line:
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;; prompt> emacs -l /path/to/definitions/tpu-edt.el
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;; If TPU-edt is installed on your system, that is, if tpu-edt.el is in
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;; a directory like /usr/local/emacs/lisp, along with dozens of other
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;; .el files, you should be able to use the command:
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;; prompt> emacs -l tpu-edt
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;; If you like TPU-edt and want to use it all the time, you can load
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;; the TPU-edt definitions using the emacs initialization file, .emacs.
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;; Simply create a .emacs file in your home directory containing the
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;; line:
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;; (load "/path/to/definitions/tpu-edt")
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;; or, if (as above) TPU-edt is installed on your system:
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;; (load "tpu-edt")
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;; Once TPU-edt has been loaded, you will be using an editor with the
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;; interface shown in the next section (A section that is suitable for
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;; cutting out of this document and pasting next to your terminal!).
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;; %% TPU-edt Default Editing Keypad, Control and Gold Key Bindings
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;;
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;; _______________________ _______________________________
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;; | HELP | Do | | | | | |
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;; |KeyDefs| | | | | | |
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;; |_______|_______________| |_______|_______|_______|_______|
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;; _______________________ _______________________________
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;; | Find |Insert |Remove | | Gold | HELP |FndNxt | Del L |
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;; | | |Sto Tex| | key |E-Help | Find |Undel L|
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;; |_______|_______|_______| |_______|_______|_______|_______|
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;; |Select |Pre Scr|Nex Scr| | Page | Sect |Append | Del W |
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;; | Reset |Pre Win|Nex Win| | Do | Fill |Replace|Undel W|
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;; |_______|_______|_______| |_______|_______|_______|_______|
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;; |Move up| |Forward|Reverse|Remove | Del C |
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;; | Top | |Bottom | Top |Insert |Undel C|
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;; _______|_______|_______ |_______|_______|_______|_______|
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;; |Mov Lef|Mov Dow|Mov Rig| | Word | EOL | Char | |
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;; |StaOfLi|Bottom |EndOfLi| |ChngCas|Del EOL|SpecIns| Enter |
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;; |_______|_______|_______| |_______|_______|_______| |
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;; | Line |Select | Subs |
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;; | Open Line | Reset | |
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;; |_______________|_______|_______|
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;; Control Characters
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;;
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;; ^A toggle insert and overwrite ^L insert page break
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;; ^B recall ^R remember, re-center
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;; ^E end of line ^U delete to beginning of line
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;; ^G cancel current operation ^V quote
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;; ^H beginning of line ^W refresh
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;; ^J delete previous word ^Z exit
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;; ^K learn ^X^X exchange point and mark
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;;
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;;
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;; Gold-<key> Functions
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;; -----------------------------------------------------------------
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;; W Write - save current buffer
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;; K Kill buffer - abandon edits and delete buffer
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;;
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;; E Exit - save current buffer and ask about others
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;; X eXit - save all modified buffers and exit
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;; Q Quit - exit without saving anything
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;;
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;; G Get - load a file into a new edit buffer
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;; I Include - include a file in this buffer
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;;
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;; B next Buffer - display the next buffer (all buffers)
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;; N Next file buffer - display next buffer containing a file
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;; M buffer Menu - display a list of all buffers
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;;
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;; U Undo - undo the last edit
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;; C Recall - edit and possibly repeat previous commands
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;;
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;; O Occur - show following lines containing REGEXP
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;; S Search and substitute - line mode REPLACE command
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;;
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;; ? Spell check - check spelling in a region or entire buffer
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;;
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;; R Toggle Rectangular mode for remove and insert
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;; * Toggle regular expression mode for search and substitute
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;;
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;; V Show TPU-edt version
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;; -----------------------------------------------------------------
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;; %% Optional TPU-edt Extensions
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;; Several optional packages have been included in this distribution
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;; of TPU-edt. The following is a brief description of each package.
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;; See the {package}.el file for more detailed information and usage
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;; instructions.
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;; tpu-extras - TPU/edt scroll margins and free cursor mode.
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;; tpu-recall - String, file name, and command history.
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;; vt-control - VTxxx terminal width and keypad controls.
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;; Packages are normally loaded from the emacs initialization file
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;; (discussed below). If a package is not installed in the emacs
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;; lisp directory, it can be loaded by specifying the complete path
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;; to the package file. However, it is preferable to modify the
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;; emacs load-path variable to include the directory where packages
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;; are stored. This way, packages can be loaded by name, just as if
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;; they were installed. The first part of the sample .emacs file
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;; below shows how to make such a modification.
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;; %% Customizing TPU-edt using the Emacs Initialization File
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;; .emacs - a sample emacs initialization file
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;; This is a sample emacs initialization file. It shows how to invoke
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;; TPU-edt, and how to customize it.
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;; The load-path is where emacs looks for files to fulfill load requests.
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;; If TPU-edt is not installed in a standard emacs directory, the load-path
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;; should be updated to include the directory where the TPU-edt files are
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;; stored. Modify and un-comment the following section if TPU-ed is not
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;; installed on your system - be sure to leave the double quotes!
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;; (setq load-path
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;; (append (list (expand-file-name "/path/to/tpu-edt/files"))
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;; load-path))
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;; Load TPU-edt
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(load "tpu-edt")
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;; Load the optional goodies - scroll margins, free cursor mode, command
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;; and string recall. But don't complain if the file aren't available.
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(load "tpu-extras" t)
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(load "tpu-recall" t)
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;; Uncomment this line to set scroll margins 10% (top) and 15% (bottom).
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;(and (fboundp 'tpu-set-scroll-margins) (tpu-set-scroll-margins "10%" "15%"))
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;; Load the vtxxx terminal control functions, but don't complain if
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;; if the file is not found.
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(load "vt-control" t)
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;; TPU-edt treats words like EDT; here's how to add word separators.
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;; Note that backslash (\) and double quote (") are quoted with '\'.
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(tpu-add-word-separators "]\\[-_,.\"=+()'/*#:!&;$")
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;; Emacs is happy to save files without a final newline; other Unix programs
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;; hate that! This line will make sure that files end with newlines.
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(setq require-final-newline t)
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;; Emacs has the ability to automatically run code embedded in files
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;; you edit. This line makes emacs ask if you want to run the code.
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(if tpu-emacs19-p (setq enable-local-variables "ask")
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(setq inhibit-local-variables t))
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;; Emacs uses Control-s and Control-q. Problems can occur when using emacs
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;; on terminals that use these codes for flow control (Xon/Xoff flow control).
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;; These lines disable emacs' use of these characters.
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(global-unset-key "\C-s")
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(global-unset-key "\C-q")
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;; top, bottom, bol, eol seem like a waste of Gold-arrow functions. The
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;; following section re-maps up and down arrow keys to top and bottom of
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;; screen, and left and right arrow keys to pan left and right (pan-left,
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;; right moves the screen 16 characters left or right - try it, you'll
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;; like it!).
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;; Re-map the Gold-arrow functions
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(define-key GOLD-CSI-map "A" 'tpu-beginning-of-window) ; up-arrow
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(define-key GOLD-CSI-map "B" 'tpu-end-of-window) ; down-arrow
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(define-key GOLD-CSI-map "C" 'tpu-pan-right) ; right-arrow
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(define-key GOLD-CSI-map "D" 'tpu-pan-left) ; left-arrow
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(define-key GOLD-SS3-map "A" 'tpu-beginning-of-window) ; up-arrow
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(define-key GOLD-SS3-map "B" 'tpu-end-of-window) ; down-arrow
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(define-key GOLD-SS3-map "C" 'tpu-pan-right) ; right-arrow
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(define-key GOLD-SS3-map "D" 'tpu-pan-left) ; left-arrow
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;; Re-map the Gold-arrow functions for X-windows TPU-edt (emacs version 19)
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(cond
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((and tpu-emacs19-p window-system)
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(define-key GOLD-map [up] 'tpu-beginning-of-window) ; up-arrow
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(define-key GOLD-map [down] 'tpu-end-of-window) ; down-arrow
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(define-key GOLD-map [right] 'tpu-pan-right) ; right-arrow
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(define-key GOLD-map [left] 'tpu-pan-left))) ; left-arrow
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;; The emacs universal-argument function is very useful for native emacs
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;; commands. This line maps universal-argument to Gold-PF1
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(define-key GOLD-SS3-map "P" 'universal-argument) ; Gold-PF1
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;; Make KP7 move by paragraphs, instead of pages.
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(define-key SS3-map "w" 'tpu-paragraph) ; KP7
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;; TPU-edt assumes you have the ispell spelling checker;
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;; Un-comment this line if you don't.
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;(setq tpu-have-spell nil)
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;; Display the TPU-edt version.
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(tpu-version)
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;; End of .emacs - a sample emacs initialization file
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;; After initialization with the .emacs file shown above, the editing
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;; keys have been re-mapped to look like this:
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;; _______________________ _______________________________
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;; | HELP | Do | | | | | |
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;; |KeyDefs| | | | | | |
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;; |_______|_______________| |_______|_______|_______|_______|
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;; _______________________ _______________________________
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;; | Find |Insert |Remove | | Gold | HELP |FndNxt | Del L |
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;; | | |Sto Tex| | U Arg |E-Help | Find |Undel L|
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;; |_______|_______|_______| |_______|_______|_______|_______|
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;; |Select |Pre Scr|Nex Scr| |Paragra| Sect |Append | Del W |
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;; | Reset |Pre Win|Nex Win| | Do | Fill |Replace|Undel W|
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;; |_______|_______|_______| |_______|_______|_______|_______|
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;; |Move up| |Forward|Reverse|Remove | Del C |
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;; |Tscreen| |Bottom | Top |Insert |Undel C|
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;; _______|_______|_______ |_______|_______|_______|_______|
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;; |Mov Lef|Mov Dow|Mov Rig| | Word | EOL | Char | |
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;; |PanLeft|Bscreen|PanRigh| |ChngCas|Del EOL|SpecIns| Enter |
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;; |_______|_______|_______| |_______|_______|_______| |
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;; | Line |Select | Subs |
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;; | Open Line | Reset | |
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;; |_______________|_______|_______|
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;; Astute emacs hackers will realize that on systems where TPU-edt is
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;; installed, this documentation file can be loaded to produce the above
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;; editing keypad layout. In fact, to get all the changes in the sample
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;; initialization file, you only need a one line initialization file:
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;; (load "tpu-doc")
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;; wow!
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;; %% Compiling TPU-edt
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;; It is not necessary to compile (byte-compile in emacs parlance)
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;; TPU-edt to use it. However, byte-compiled code loads and runs
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;; faster, and takes up less memory when loaded. To byte compile
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;; TPU-edt, use the following command.
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;; emacs -batch -f batch-byte-compile tpu-edt.el
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;; This will produce a file named tpu-edt.elc. This new file can be
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;; used in place of the original tpu-edt.el file. In commands where
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;; the file type is not specified, emacs always attempts to use the
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;; byte-compiled version before resorting to the source.
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;; %% Regular expressions in TPU-edt
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;; Gold-* toggles TPU-edt regular expression mode. In regular expression
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;; mode, find, find next, replace, and substitute accept emacs regular
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;; expressions. A complete list of emacs regular expressions can be
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;; found using the emacs "info" command (it's somewhat like the VMS help
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;; command). Try the following sequence of commands:
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;; DO info <enter info mode>
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;; m regex <select the "regular expression" topic>
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;; m directives <select the "directives" topic>
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;; Type "q" to quit out of info mode.
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;; There is a problem in regular expression mode when searching for
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;; empty strings, like beginning-of-line (^) and end-of-line ($).
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;; When searching for these strings, find-next may find the current
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;; string, instead of the next one. This can cause global replace and
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;; substitute commands to loop forever in the same location. For this
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;; reason, commands like
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;; replace "^" "> " <add "> " to beginning of line>
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;; replace "$" "00711" <add "00711" to end of line>
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;; may not work properly.
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;; Commands like those above are very useful for adding text to the
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;; beginning or end of lines. They might work on a line-by-line basis,
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;; but go into an infinite loop if the "all" response is specified. If
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;; the goal is to add a string to the beginning or end of a particular
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;; set of lines TPU-edt provides functions to do this.
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;; Gold-^ Add a string at BOL in region or buffer
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;; Gold-$ Add a string at EOL in region or buffer
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;; There is also a TPU-edt interface to the native emacs string
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;; replacement commands. Gold-/ invokes this command. It accepts
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;; regular expressions if TPU-edt is in regular expression mode. Given
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;; a repeat count, it will perform the replacement without prompting
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;; for confirmation.
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;; This command replaces empty strings correctly, however, it has its
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;; drawbacks. As a native emacs command, it has a different interface
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;; than the emulated TPU commands. Also, it works only in the forward
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;; direction, regardless of the current TPU-edt direction.
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;; %% Etcetera
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;; That's TPU-edt in a nutshell...
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;; Please send any bug reports, feature requests, or cookies to the
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;; author, Rob Riepel, at the address shown by the tpu-version command
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;; (Gold-V).
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;; Share and enjoy... Rob Riepel 7/93
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;;; tpu-doc.el ends here
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