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In article <1180@water.waterloo.edu> ljdickey@water.waterloo.edu (Lee Dickey) writes:
>I have been experimenting with three different versions of EMACS
>on my ST,  
>one is called simply EMACS.PRG, one is called MG, and the third is
>called microEMACS and comes as a part of the Gulam shell.
>

MG is Micro GNU Emacs, ie it is an emacs which is very compatable with
GNU Emacs on many UNIX mainframes.

EMACS.PRG is actually MicroEMACS 3.x (7 or 8 or 9) and is an extensive
emacs with a macro language and a lot of features.

All three of the above EMACS were originally derived from Dave Conroy's
microEMACS (which is essentially what is inside GULAM) written in
1984/1985.

>So far, I feel that I have not progressed very far on the learning curve.
>because I can not make any of them do much more than some primitive
>word processors.
>
>(I have used and written about two powerful programmable editors, and
>am looking for some of the same capabilities.)
>

Since I have been programming MicroEMACS 3.x for a couple of years, I
can only answer your questions for that one.

>I have a few questions that maybe someone can help me with, please :-) .
>I know that I am revealing my ignorance here, but that is exactly
>what it is, ignorance.
>
>	How can I read a file into an existing buffer?
>		(This is what VI users do by typing
>		the command ".r file".)
>

^X ^I	(insert-file)	inserts a disk file into the current buffer
			at the location of the cursor.

^X ^R	(read-file)	reads a file into a buffer replacing its
			original contents

^X ^F	(find-file)	finds a file already in a buffer and switches to
			it, or creates a new buffer and reads the file in.

>	How do I change in lines with "exp1", all instance of "exp2"
>		to "text3".  (This is what VI users by typing
>		the command   "1,$ g/exp1/ s/exp2/text3/". )
>
This one is difficult.....

30 store-macro
	set %savebuf $cbufname
	set %exp1 @"Selection string: "
	set %exp2 @"Search string: "
	set %text3 @"Replacement String: "
*nexts
	search-forward %exp1	;when this fails, the macro aborts...
	beginning-of-line
	1 kill-to-end-of-line	;grab the line
	select-buffer "[temp]"	;stash it...
	yank
	beginning-of-file	;do the replacement (ignoring a failure)
	!force replace-string %exp2 %text3
	beginning-of-file	;grab it again
	1 kill-to-end-of-line
	select-buffer %savebuf	;and put it back
	yank			;we are now positioned at the next line
	!goto nexts
!endm

bind-to-key execute-macro-30 M-S	;bind this to Meta-S (too pick one)

	now the META-S keystroke will do what you ask from the current
cursor in the current buffer to the end of that buffer.

>	How do I define a macro when starting the editor?
>

Place it in your emacs.rc file  (or .emacsrc on UNIX or the AMIGA)

>	Can I define a macros from a text file after the editor
>		is running?
>

Yes, the execute-file command executes a file of macros

A close look at the emacs.mss file that comes in the standard
distribution package should answer most of your questions.

>Thanks!
>
>-- 
> L. J. Dickey, Faculty of Mathematics, University of Waterloo. 
> ljdickey@watmath.UUCP		UUCP: ...!uunet!watmath!ljdickey
> ljdickey%water@waterloo.edu	ljdickey@watdcs.BITNET		
> ljdickey%water%waterloo.csnet@csnet-relay.ARPA

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