Usenet 1994 October/usenetsourcesnewsgroupsinfomagicoctober1994disk2.iso/misc/volume1/8711/12

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From: [e-mail] (Daniel Lawrence)
Newsgroups: comp.sources.misc
Subject: MicroEmacs 3.9 Manual (1 of 6)
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Date: 26 Nov 87 04:13:39 GMT
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[Sorry for the hiatus.  A short trip out of state turned out to be longer than
I expected; ``the best-laid plans,'' and so on.

This shar archive arrived in pieces; you must save the messages, chop off
headers and trailers, concatenate, THEN unshar.  Somewhat bogus, by my
reckoning....  ++bsa]

# This is a shar archive.
# Remove everything above this line.
# Run the file through sh, not csh.
# (type `sh this_file')
# If you do not see the message
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# then the file was incomplete.
echo extracting - emacs.mss
sed 's/^X//' > emacs.mss << 'FRIDAY_NIGHT'
X@style(indent 8 chars, spacing 1 lines)
X@pagefooting()
X
X
X
X
X
X
X
X
X
X
X
X
X        @big(MicroEMACS)
X
X        Full Screen Text Editor
X        Reference Manual (preliminary draft)
X
X        Version 3.9e
X        November 4, 1987
X
X        (C)opyright 1987 by Daniel M. Lawrence
X        Reference Manual (C)opyright 1987
X            by Brian Straight and Daniel M. Lawrence
X        All Rights Reserved
X
X        @i(MicroEMACS 3.9e can be copied and distributed freely
X        for any non-commercial purposes. MicroEMACS 3.9e can
X        only be incorporated into commercial software with
X        the permission of the current author.)
X@newpage
X@newpage
X@flushleft(@big[Introduction])
X
X    MicroEMACS is a tool for creating and changing documents,
Xprograms, and other text files.  It is both relatively easy for the
Xnovice to use, but also very powerful in the hands of an expert.
XMicroEMACS can be extensively customized for the needs of the
Xindividual user.
X
X    MicroEMACS allows several files to be edited at the same time.
XThe screen can be split into different windows, and text may be moved
Xfreely from one window to the next.  Depending on the type of file being
Xedited, MicroEMACS can change how it behaves to make editing simple.
XEditing standard text files, program files and word processing documents
Xare all possible at the same time.
X
X    There are extensive capabilities to make word processing and
Xediting easier.  These include commands for string searching and
Xreplacing, paragraph reformatting and deleting, automatic word wrapping,
Xword move and deletes, easy case controlling, and automatic word counts.
X
X    For complex and repetitive editing tasks editing macroes can be
Xwritten.  These macroes allow the user a great degree of flexibility in
Xdetermining how MicroEMACS behaves.  Also, any and all the commands can
Xbe used by any keystroke by changing, or rebinding, what commands
Xvarious keys are connected, or bound, to.
X
X    Special features are also available to perform a diverse set of
Xoperations such as file encryption, automatic backup file generation,
Xentabbing and detabbing lines, executing of DOS commands and filtering
Xof text through other programs (like SORT to allow sorting text).
X
X@flushleft(@big[History])
X
X    EMACS was originally a text editor written by Richard Stahlman
Xat MIT in the early 1970s for Digital Equipment computers. Various
Xversions, rewrites and clones have made an appearence since.
X
X    This version of MicroEMACS is derived from code written by Dave
XG. Conroy in 1985.  Later modifications were performed by Steve Wilhite
Xand George Jones.  In December of 1985 Daniel Lawrence picked up the
Xthen current source (version 2.0) and made extensive modifications and
Xadditions to it over the course of the next two years.  Updates and
Xsupport for the current version are still availible.  The current
Xprogram author can be contacted by writing to:
X
X@begin(verbatim)
X    USMAIL:    Daniel Lawrence
X        617 New York St
X        Lafayette, IN 47901
X
X    UUCP:    ihnp4!pur-ee!pur-phy!duncan!lawrence
X    ARPA:    nwd@@j.cc.purdue.edu
X    FIDO:    Fido 201/2 The Programmer's Room [phone]
X@end(verbatim)
X@string(ChapterTitle="")
X@set(page = 0)
X@pageheading(odd, left "@title[Chapter]", right "MicroEMACS Reference Manual")
X@pageheading(even, left "MicroEMACS Reference Manual", right "@title[Chapter]")
X@pagefooting(odd, left="@value(page)")
X@pagefooting(even, right="@value(page)")
X@chapter(Basic Concepts)
X
X    The current version of MicroEMACS is 3.9e (Third major re-write,
Xninth public release, fifth minor edit), and for the rest of this
Xdocument, we shall simply refer to this version as "EMACS".  Any
Xmodifications for later versions will be listed in the appendixes at the
Xend of this manual.
X
X@section(Keys and the Keyboard)
X
X    Many times throughout this manual we will be talking about
X@index(special keys) commands and the keys on the keyboard needed to use
Xthem.  There are a number of "special" keys which can be used and are
Xlisted here:
X
X@begin(description)
X<NL>@\NewLine which is also called RETURN or ENTER, this key is used to
X@index(newline) end different commands.
X
X^@\The control key can be used before any alphabetic character and some
Xsymbols.  For example, ^C means to hold down the <CONTROL> key and type
X@index(control key) the C key at the same time.
X
X^X@\The CONTROL-X key is used at the beginning of many different
X@index(control-x) commands.
X
XMETA or M-@\This is a special EMACS key used to begin many commands as
X@index(meta key) well.  This key is pressed and then released before
Xtyping the next character.  On most systems, this is the <ESC> key, but
Xit can be changed.  (consult appendix E to learn what key is used for
XMETA on your computer).
X@end(description)
X
XWhenever a command is described, the manual will list the actual
Xkeystrokes needed to execute it in @b(boldface) using the above
Xconventions, and also the name of the command in @i(italics).
X@section(Getting Started)
X
X    In order to use EMACS, you must call it up from your system or
Xcomputer's command prompt.  On UNIX and MSDOS machines, just type
X"emacs" from the main command prompt and follow it with the <RETURN> or
X<ENTER> key (we will refer to this key as <NL> for "new-line" for the
Xremainder of this manual).  On the Macintosh, the Amiga, the ATARI ST
Xand other icon based operating systems, double click on the uEMACS icon.
XShortly after this, a screen similar to the one below should appear.
X
X@section(Parts and Pieces)
X
X    The screen is divided into a number of areas or @b<windows>.  On
Xsome systems the top window contains a function list of unshifted and
X@index(windows) shifted function keys.  We will discuss these keys later.
X@index(mode line) Below them is an EMACS @b<mode line> which, as we will
Xsee, informs you of the present mode of operation of the editor--for
Xexample "(WRAP)" if you set EMACS to wrap at the end of each line.
X@index(text window) Under the mode line is the @b<text window> where text
Xappears and is manipulated.  Since each window has its own mode line,
Xbelow the text window is it's mode line.  The last line of the screen is
Xthe @b(command line) where EMACS takes commands and reports on what it
Xis doing.
X
X@begin(verbatim)
X===============================================================================
Xf1 search-> f2 <-search |    MicroEMACS:  Text Editor
Xf3 hunt->   f4 <-hunt   |
Xf5 fkeys    f6 help     |  Available function key Pages include:
Xf7 nxt wind f8 pg[    ] |    WORD  PROG  BOX
Xf9 save     f10 exit    |  [use the f8 key to load Pages]
X===============================================================================
X-- MicroEMACS 3.9e () -- Function Keys ---------------------------------------
X===============================================================================
X
X
X
X
X
X
X
X
X
X
X
X
X===============================================================================
X-- MicroEMACS 3.9e () -- Main ------------------------------------------------
X===============================================================================
X        Fig 1:    EMACS screen on an IBM-PC
X@end(verbatim)
X
X@section(Entering Text)
X
XEntering text in EMACS is simple.  Type the following sentence fragment:
X
X@quotation<Fang Rock lighthouse, center of a series of mysterious and>
X
X@flushleft(The text is displayed at the top of the text window.  Now type:)
X
X@quotation<terrifying events at the turn of the century>
X
XNotice the text to the left of the cursor disappears and a '$' sign
Xappears.  Don't panic--your text is safe!!! You've just discovered that
XEMACS doesn't "wrap" text to the next line like most word processors
Xunless you hit <NL>.  But since EMACS is used for both word processing,
Xand text editing, it has a bit of a dual personality.  You can change
X@index(modes) the way it works by setting various @b(modes).  In this
Xcase, you need to set @b(WRAP) mode, using the @i(add-mode)
X@index(add-mode) command, by typing @b(^X-M).  The command line at the
Xbase of the screen will prompt you for the mode you wish to add.  Type
X@b<wrap> followed by the <NL> key and any text you now enter will be
Xwrapped.  However, the command doesn't wrap text already entered.  To
Xget rid of the truncated line, delete characters with the <BACKSPACE>
Xkey until the '$' goes away.  Now type in the words you deleted, watch
Xhow EMACS goes down to the next line at the right time.  @i{(In some
Xversions of EMACS, @b<WRAP> is a default mode in which case you don't
Xhave to worry about the instructions relating to adding this mode.)}
X
XNow let's type a longer insert.  Hit <NL> a couple of times to tab
Xdown from the text you just entered.  Now type the following paragraphs.
XPress <NL> twice to indicate a paragraph break.
X
X@quotation<Fang Rock lighthouse, center of a series of mysterious and
Xterrifying events at the turn of the century, is built on a rocky island
Xa few miles of the Channel coast.  So small is the island that wherever
Xyou stand its rocks are wet with sea spray.
X
XThe lighthouse tower is in the center of the island.  A steep flight of
Xsteps leads to the heavy door in its base.  Winding stairs lead up to
Xthe crew room.>
X
X@section<Basic cursor movement>
X
XNow let's practice moving around in this text.  To move the cursor back
Xto the word "Winding," enter @b<M-B> @i(previous-word)
X@index(previous-word).  This command moves the cursor backwards by one
Xword at a time.  Note you have to press the key combination every time
Xthe cursor steps back by one word.  Continuously pressing META and
Xtoggling B produces an error message.  To move forward to the word
X"stairs" enter @b<M-F>, which moves the cursor forward by one word at a
Xtime.
X
XNotice that EMACS commands are usually mnemonic--F for forward, B for
Xbackward, for example.
X
XTo move the cursor up one line, enter @b<^P> @i(previous-line)
X@index(previous-line), down one line @b<^N> @i(next-line)
X@index(next-line).  Practice this movement by moving the cursor to the
Xword "terrifying" in the second line.
X
XThe cursor may also be moved forward or backward in smaller increments.
XTo move forward by one character, enter @b<^F> @i(forward-character)
X@index(forward-character), to move backward, @b<^B>
X@i(backward-character) @index(backward-character).  EMACS also allows
Xyou to specify a number which is normally used to tell a command to
Xexecute many times.  To repeat most commands, press META and then the
Xnumber before you enter the command.  Thus, the command META 5 ^F
X(@b<M-5^F>) will move the cursor forward by five characters.  Try moving
Xaround in the text by using these commands.  For extra practice, see how
Xclose you can come to the word "small" in the first paragraph by giving
Xan argument to the commands listed here.
X
XTwo other simple cursor commands that are useful to help us move around
Xin the text are @b<M-N> @i(next-paragraph) @index(next-paragraph) which
Xmoves the cursor to the second paragraph, and @b<M-P>
X@i(previous-paragraph) @index(previous-paragraph) which moves it back to
Xthe previous paragraph.  The cursor may also be moved rapidly from one
Xend of the line to the other.  Move the cursor to the word "few" in the
Xsecond line.  Press @b<^A> @i(beginning-of-line)
X@index(beginning-of-line).  Notice the cursor moves to the word "events"
Xat the beginning of the line.  Pressing @b<^E> @i(end-of-line)
X@index(end-of-line) moves the cursor to the end of the line.
X
XFinally, the cursor may be moved from any point in the file to the end
Xor beginning of the file.  Entering @b{M->} @i(end-of-file)
X@index(end-of-file) moves the cursor to the end of the buffer, @b{M-<}
X@i(beginning-of-file) @index(beginning-of-file) to the first character
Xof the file.
X
X@i(On the IBM-PC, the ATARI ST and many other machines, the cursor keys
X@index(cursor keys) can also be used to move the cursor about.  Also, if
Xthere is one available, moving the mouse will move the cursor.)
X
XPractice moving the cursor in the text until you are comfortable with
Xthe commands we've explored in this chapter.
X
X@section(Saving your text)
X
XWhen you've finished practicing cursor movement, save your file.  Your
X@index(buffer) file currently resides in a @b<BUFFER>.  The buffer is a
Xtemporary storage area for your text, and is lost when the computer is
Xturned off.  You can save the buffer to a file by entering @b<^X-^S>
X@i(save-file) @index(save-file).  Notice that EMACS informs you that
Xyour file has no name and will not let you save it.
X
XTo save your buffer to a file with a different name than it's current
Xone (which is empty), press @b<^X^W> @i(write-file) @index(write-file).
XEMACS will prompt you for the filename you wish to write.  Enter the
Xname @b<fang.txt> and press return.  On a micro, the drive light will
Xcome on, and EMACS will inform you it is writing the file.  When it
Xfinishes, it will inform you of the number of lines it has written to
Xthe disk.
X
XCongratulations!! You've just saved your first EMACS file!
X@newpage
X@heading(Chapter @value(chapter) Summary)
X
X    In chapter @value(chapter), you learned how to enter text, how
Xto use wrap mode, how to move the cursor, and to save a buffer.  The
Xfollowing is a table of the commands covered in this chapter and their
Xcorresponding key bindings:
X
X@begin{verbatim}
X@u(Key Binding        Keystroke    Effect)
X
Xabort-command        @b<^G>        aborts current command
X
Xadd-mode        @b<^XM>        allows addition of EMACS
X                    mode such as @b(WRAP)
X
Xbackward-character    @b<^B>        moves cursor left one character
X
Xbeginning-of-file    @b{M-<}        moves cursor to beginning of file
X
Xbeginning-of-line    @b<^A>        moves cursor to beginning of line
X
Xend-of-file        @b{M->}        moves cursor to end of file
X
Xend-of-line        @b<^E>        moves cursor to end of line
X
Xforward-character    @b<^F>        moves cursor right one character
X
Xnext-line        @b<^N>        moves cursor to next line
X
Xnext-paragraph        @b<M-N>        moves cursor to next paragraph
X
Xnext-word        @b<M-F>        moves cursor forward one word
X
Xprevious-line        @b<^P>        moves cursor backward by one line
X
Xprevious-paragraph    @b<M-P>        moves cursor to previous paragraph
X
Xprevious-word        @b<M-B>        moves cursor backward by one word
X
Xsave-file        @b<^X-^S>    saves current buffer to a file
X
Xwrite-file        @b<^X-^W>    save current buffer under a new name
X@end(verbatim)
X@newpage
X@chapter(Basic Editing--Simple Insertions and Deletions)
X
X@section<A Word About Windows, Buffers, Screens, and Modes>
X
XIn the first chapter, you learned how to create and save a file in
XEMACS.    Let's do some more editing on this file.  Call up emacs by
Xtyping in the following command.
X
X@b<emacs fang.txt>
X
X@i(On icon oriented systems, double click on the uEMACS icon, usually a
Xfile dialog box of some sort will appear.  Choose @b(FANG.TXT) from the
Xappropriate folder.)
X
XShortly after you invoke EMACS, the text should appear on the screen
Xready for you to edit.  The text you are looking at currently resides in
Xa @b<buffer>.  A buffer is a temporary area of computer memory which is
X@index(buffer) the primary unit internal to EMACS -- this is the place
Xwhere EMACS goes to work.  The mode line at the bottom of the screen
Xlists the buffer name, @b<FANG.TXT> and the name of the file with which
Xthis buffer is associated, @b<FANG.TXT>
X
XThe computer talks to you through the use of its @b(screen).  This
X@index(screen) screen usually has an area of 24 lines each of 80
Xcharacters across.  You can use EMACS to subdivide the screen into
Xseveral separate work areas, or @b(windows), each of which can be
X@index(window) 'looking into' different files or sections of text.  Using
Xwindows, you can work on several related texts at one time, copying and
Xmoving blocks of text between windows with ease.  To keep track of what
Xyou are editing, each window is identified by a @b(mode line) on the
X@index(mode line) @index(buffer) last line of the window which lists the
Xname of the @b(buffer) which it is looking into, the file from which the
Xtext was read, and how the text is being edited.
X
XAn EMACS @b<mode> tells EMACS how to deal with user input.  As we have
Xalready seen, the mode 'WRAP' controls how EMACS deals with long lines
X(lines with over 79 characters) while the user is typing them in.  The
X'VIEW' mode, allows you to read a file without modifying it.  Modes are
Xassociated with buffers and not with files; hence, a mode needs to be
Xexplicitly set or removed every time you edit a file.  A new file read
Xinto a buffer with a previously specified mode will be edited under this
Xmode.  If you use specific modes frequently, EMACS allows you to set
Xthe modes which are used by all new buffers, called @b<global> modes.
X
X@section<Insertions>
X
XYour previously-saved text should look like this:
X
X@quotation<Fang Rock lighthouse, center of a series of mysterious and
Xterrifying events at the turn of the century, is built on a rocky island
Xa few miles of the Channel coast.  So small is the island that wherever
Xyou stand its rocks are wet with sea spray.
X
XThe lighthouse tower is in the center of the island.  A steep flight of
Xsteps leads to the heavy door in its base.  Winding stairs lead up to
Xthe crew room.>
X
XLet's assume you want to add a sentence in the second paragraph after
Xthe word "base."  Move the cursor until it is on the "W" of "Winding".
XNow type the following:
X
X@quotation<This gives entry to the lower floor where the big steam
Xgenerator throbs steadily away, providing power for the electric
Xlantern.>
X
XIf the line fails to wrap and you end up with a '$' sign in the right
Xmargin, just enter @b{M-Q} @i(fill-paragraph) @index(fill-paragraph) to
Xreformat the paragraph.  This new command attempts to fill out a
Xparagraph.  Long lines are divided up, and words are shuffled around to
Xmake the paragraph look nicer.
X
XNotice that all visible EMACS characters are self-inserting -- all you
Xhad to do was type the characters to insert and the existing text made
Xspace for it.  With a few exceptions discussed later, all non-printing
Xcharacters (such as control or escape sequences) are commands.  To
Xinsert spaces, simply use the space bar.  Now move to the first line of
Xthe file and type @b{^O} @i(open-line) @index(open-line) (Oh, not zero).
XYou've just learned how to insert a blank line in your text.
X
X@section<Deletions>
X
XEMACS offers a number of deletion options.  For example, move the cursor
Xuntil it's under the period at the end of the insertion you just did.
XPress the backspace key.  Notice the "n" on "lantern" disappeared.  The
Xbackspace implemented on EMACS is called a @b<destructive> backspace--it
Xremoves text immediately before the current cursor position from the
Xbuffer.  Now type @b<^H> @i(delete-previous-character)
X@index(delete-previous-character).  Notice that the cursor moves back
Xand obliterates the "r"--either command will backspace the cursor.
X
XType in the two letters you erased to restore your text and move the
Xcursor to the beginning of the buffer @b{M->} @i(beginning-of-file)
X@index(beginning-of-file).  Move the cursor down one line to the
Xbeginning of the first paragraph.
X
XTo delete the forward character, type @b{^D} @i(delete-next-character)
X@index(delete-next-character).  The "F" of "Fang" disappears.  Continue
Xto type @b{^D} until the whole word is erased EMACS also permits the
Xdeletion of larger elements of text.  Move the cursor to the word
X"center" in the first line of text.  Pressing @b{M-<backspace>}
X@i(delete-previous-word) @index(delete-previous-word) kills the word
Ximmediately before the cursor.  @b{M-^H} has the same effect.
X
XNotice that the commands are very similar to the control commands you
Xused to delete individual letters.  As a general rule in EMACS, control
Xsequences affect small areas of text, META sequences larger areas.  The
Xword forward of the cursor position can therefore be deleted by typing
X@b{M-D} @i(delete-next-word) @index(delete-next-word).  Now let's take
Xout the remainder of the first line by typing @b{^K}
X@i(kill-to-end-of-line) @index(kill-to-end-of-line).  You now have a
Xblank line at the top of your screen.  Typing @b{^K} again or @b{^X-^O}
X@i(delete-blank-lines) @index(delete-blank-lines) deletes the blank line
Xand flushes the second line to the top of the text.  Now exit EMACS by
Xtyping @b{^X-^C} @i(exit-emacs) @index(exit-emacs).  Notice EMACS
Xreminds you that you have not saved your buffer.  Ignore the warning and
Xexit.  This way you can exit EMACS without saving any of the changes you
Xjust made.
X
X@heading(Chapter @value(chapter) Summary)
X
XIn Chapter @value(chapter), you learned about the basic 'building
Xblocks' of an EMACS text file--buffers, windows, and files.
X
X@begin{verbatim}
X@u(Key binding        Keystroke    Effect)
Xdelete-previous-character
X            @b{^H}        deletes character immediately before
X                    the current cursor position
X
Xdelete-next-character    @b{^D}        deletes character immediately after
X                    current cursor position
X
Xdelete-previous-word    @b{M-^H}    deletes word immediately before
X                    current cursor position
X
Xdelete-next-word    @b{M-D}        deletes word immediately after
X                    current cursor position
X
Xkill-to-end-of-line    @b<^K>        deletes from current cursor
X                    position to end of line
X
Xinsert-space        @b<^C>        inserts a space to right of cursor
X
Xopen-line        @b{^O}        inserts blank line
X
Xdelete-blank-lines    @b{^X-^O}    removes blank line
X
Xexit-emacs        @b{^X-^C}    exits emacs
X@end(verbatim)
X@chapter(Using Regions)
X
X@section(Defining and Deleting a Region)
X
XAt this point its time to familiarize ourselves with two more EMACS
Xterms--the @b<point> and the @b<mark>.  The point is located directly
X@index(point) @index(mark) behind the current cursor position.  The mark
X(as we shall see shortly) is user defined.  These two elements together
Xare called the current @b(region) and limit the @b<region> of text on
Xwhich EMACS performs many of its editing functions.
X
XLet's begin by entering some new text.  Don't forget to add @b(wrap)
Xmode if its not set on this buffer.  Start EMACS and open a file called
X@b{PUBLISH.TXT}.  Type in the following text:
X
X@quotation{One of the largest growth areas in personal computing is
Xelectronic publishing.  There are packages available for practically
Xevery machine from elegantly simple programs for the humble Commodore 64
Xto sophisticated professional packages for PC and Macintosh computers.
X
XElectronic publishing is as revolutionary in its way as the Gutenburg
Xpress.  Whereas the printing press allowed the mass production and
Xdistribution of the written word, electronic publishing puts the means
Xof production in the hands of nearly every individual.  From the class
Xmagazine to the corporate report, electronic publishing is changing the
Xway we produce and disseminate information.
X
XPersonal publishing greatly increases the utility of practically every
Xcomputer.  Thousands of people who joined the computer revolution of
Xthis decade only to hide their machines unused in closets have
Xdiscovered a new use for them as dedicated publishing workstations.}
X
XNow let's do some editing.  The last paragraph seems a little out of
Xplace.  To see what the document looks like without it we can cut it
Xfrom the text by moving the cursor to the beginning of the paragraph.
XEnter @b(M-<space>) @i(set-mark) @index(set-mark).  EMACS will respond
Xwith "[Mark set]".  Now move the cursor to the end of the paragraph.
XYou have just defined a region of text.  To remove this text from the
Xscreen, type @b<^W> @i(kill-region) @index(kill-region).  The paragraph
Xdisappears from the screen.
X
XOn further consideration, however, perhaps the paragraph we cut wasn't
Xso bad after all.  The problem may have been one of placement.  If we
Xcould tack it on to the end of the first paragraph it might work quite
Xwell to support and strengthen the argument.  Move the cursor to the end
Xof the first paragraph and enter @b<^Y> @i(yank) @index(yank).  Your
Xtext should now look like this:
X
X@quotation{One of the largest growth areas in personal computing is
Xelectronic publishing.  There are packages available for practically
Xevery machine from elegantly simple programs for the humble Commodore 64
Xto sophisticated professional packages for PC and Macintosh computers.
XPersonal publishing greatly increases the utility of practically every
Xcomputer.  Thousands of people who joined the computer revolution of
Xthis decade only to hide their machines unused in closets have
Xdiscovered a new use for them as dedicated publishing workstations.
X
XElectronic publishing is as revolutionary in its way as the Gutenburg
Xpress.  Whereas the printing press allowed the mass production and
Xdistribution of the written word, electronic publishing puts the means
Xof production in the hands of nearly every individual.    From the class
Xmagazine to the corporate report, electronic publishing is changing the
Xway we produce and disseminate information.}
X
X@section(Yanking a Region)
X
XThe text you cut initially didn't simply just disappear, it was cut into
Xa buffer that retains the 'killed' text appropriately called the @b<kill
Xbuffer>.  @b<^Y> "yanks" the text back from this buffer into the current
Xbuffer. If you have a long line (indicated, remember, by the "$"
Xsign), simply hit @b{M-Q} to reformat the paragraph.
X
XThere are other uses to which the kill buffer can be put.  Using the
X@index(kill buffer) method we've already learned, define the last
Xparagraph as a region.  Now type @b<M-W> @i(copy-region)
X@index(copy-region).  Nothing seems to have happened; the cursor stays
Xblinking at the point.  But things have changed, even though you may not
Xbe able to see any alteration.
X
XTo see what has happened to the contents of the kill buffer, move the
Xcursor down a couple of lines and "yank" the contents of the kill buffer
Xback with @b<^Y>.  Notice the last paragraph is now repeated.  The
Xregion you defined is "tacked on" to the end of your file because
X@b<M-W> @b<copies> a region to the kill buffer while leaving the
Xoriginal text in your working buffer.  Some caution is needed however,
Xbecause the contents of the kill buffer are updated when you delete any
Xregions, lines or words.  If you are moving large quantities of text,
Xcomplete the operation before you do any more deletions or you could
Xfind that the text you want to move has been replaced by the most recent
Xdeletion.  Remember--a buffer is a temporary area of computer memory
Xthat is lost when the machine is powered down or switched off.  In order
Xto make your changes permanent, they must be saved to a file before you
Xleave EMACS.  Let's delete the section of text we just added and save
Xthe file to disk.
X
X@heading(Chapter @value(chapter) Summary)
X
XIn Chapter @value(chapter), you learned how to achieve longer insertions
Xand deletions.  The EMACS terms @b<point> and @b<mark> were introduced
Xand you learned how to manipulate text with the kill buffer.
X
X@begin{verbatim}
X@begin(group)
X@u(Key Binding    Keystroke    Effect)
X
XDelete-Region    @b{^W}        Deletes region between point and mark and
X                places it in KILL buffer
X
XCopy-Region    @b{M-W}        Copies text between point and mark into
X                KILL buffer
X
XYank-Text    @b{^Y}        Inserts a copy of the KILL buffer into
X                current buffer at point
X@end(group)
X@end(verbatim)
X@chapter(Search and Replace)
X
X@section<Forward Search>
X
XLoad EMACS and bring in the file you just saved.  Your file should look
Xlike the one below.
X
X@quotation{One of the largest growth areas in personal computing is electronic
Xpublishing.  There are packages available for practically every machine
Xfrom elegantly simple programs for the humble Commodore 64 to
Xsophisticated professional packages for PC and Macintosh computers.
XPersonal publishing greatly increases the utility of practically every
Xcomputer.  Thousands of people who joined the computer revolution of
Xthis decade only to hide their machines unused in closets have
Xdiscovered a new use for them as dedicated publishing workstations.
X
XElectronic publishing is as revolutionary in its way as the Gutenburg
Xpress.  Whereas the printing press allowed the mass production and
Xdistribution of the written word, electronic publishing puts the means
Xof production in the hands of nearly every individual.    From the class
Xmagazine to the corporate report, electronic publishing is changing the
Xway we produce and disseminate information.}
X
XLet's use EMACS to search for the word "revolutionary" in the second
Xparagraph.  Because EMACS searches from the current cursor position
Xtoward the end of buffers, and we intend to search forward, move the
Xcursor to the beginning of the text.  Enter @b<^S> @i(search-forward)
X@index(search-forward).  Note that the command line now reads
X
X"Search [] <META>:"
X
XEMACS is prompting you to enter the @b<search string> -- the text you
Xwant to find.  Enter the word @b<revolutionary> and hit the @b<META>
Xkey.  The cursor moves to the end of the word "revolutionary."
X
XNotice that you must enter the <META> key to start the search.  If you
X@index(<NL>) simply press <NL> the command line responds with "<NL>".
XAlthough this may seem infuriating to users who are used to pressing the
Xreturn key to execute any command, EMACS' use of <META> to begin
Xsearches allows it to pinpoint text with great accuracy.  After every
Xline wrap or carriage return, EMACS 'sees' a new line character (<NL>).
XIf you need to search for a word at the end of a line, you can specify
Xthis word uniquely in EMACS.
X
XIn our sample text for example, the word "and" occurs a number of times,
Xbut only once at the end of a line.  To search for this particular
Xoccurence of the word, move the cursor to the beginning of the buffer
Xand type @b(^S).  Notice that EMACS stores the last specified
X@index(default string) search string as the @b<default> string.  If you
Xpress @b{<META>} now, EMACS will search for the default string, in this
Xcase, "revolutionary."
X
XTo change this string so we can search for our specified "and" simply
Xenter the word @b{and} followed by @b{<NL>}.  The command
Xline now shows:
X
X"search [and<NL>]<META>:"
X
XPress @b{<META>} and the cursor moves to "and" at the end of the second
Xlast line.
X
X@section<Exact Searches>
X
XIf the mode EXACT is active in the current buffer, EMACS searches on a case
Xsensitive basis.  Thus, for example you could search for @b{Publishing}
Xas distinct from @b{publishing}.
X
X
X@section<Backward Search>
X
XBackward searching is very similar to forward searching except that it
Xis implemented in the reverse direction.  To implement a reverse search,
Xtype @b{^R} @i(search-reverse) @index(search-reverse).  Because EMACS
Xmakes no distinction between forward and backward stored search strings,
Xthe last search item you entered appears as the default string.  Try
Xsearching back for any word that lies between the cursor and the
Xbeginning of the buffer.  Notice that when the item is found, the point
Xmoves to the beginning of the found string (i.e., the cursor appears
Xunder the first letter of the search item).
X
XPractice searching for other words in your text.
X
X@section<Searching and Replacing>
X
XSearching and replacing is a powerful and quick way of making changes to
Xyour text.  Our sample text is about electronic publishing, but the
Xcorrect term is 'desktop' publishing.  To make the necessary changes we
Xneed to replace all occurences of the word "electronic" with "desktop."
XFirst, move the cursor to the top of the current buffer with the @b(M-<)
Xcommand.  Then type @b[M-R] @i(replace-string) @index(replace-string).
XThe command line responds:
X
X"Replace []<META>:"
X
Xwhere the square brackets enclose the default string.  Type the word
X@b<electronic> and hit @b{<META>}.  The command line responds:
X
X"with []<META>"
X
Xtype @b{desktop<META>}.  EMACS replaces all instances of the original
Xword with your revision.  Of course, you will have to capitalize the
Xfirst letter of "desktop" where it occurs at the beginning of a
Xsentence.
X
XYou have just completed an @b<unconditional replace>.  In this
Xoperation, EMACS replaces every instance of the found string with the
Xreplacement string.
X
X@section<Query-Replace>
X
XYou may also replace text on a case by case basis.  The @b{M-^R}
X@i(query-replace-string) @index(query-replace-string) command causes
XEMACS to pause at each instance of the found string.
X
XFor example, assume we want to replace some instances of the word
X"desktop" with the word "personal." Go back to the beginning of the
Xcurrent buffer and enter the @b(M-^R) @i(query-replace)
X@index(query-replace) command.  The procedure is very similar to that
Xwhich you followed in the unconditional search/replace option.  When the
Xsearch begins however, you will notice that EMACS pauses at each
Xinstance of "publishing" and asks whether you wish to replace it with
Xthe replacement string.  You have a number of options available for
Xresponse:
X
X@begin(verbatim)
X@u(    Response    Effect)
X    Y(es)    Make the current replacement and skip to the next
X        occurence of the search string
X
X    N(o)    Do not make this replacement but continue
X
X    !    Do the rest of the replacements with no more queries
X
X    U(ndo)    Undo just the last replacement and query for it
X        again (This can only go back ONE time)
X
X    ^G    Abort the replacement command (This action does not
X        undo previously-authorized replacements
X
X    .    Same effect as ^G, but cursor returns to the point at
X        which the replacement command was given
X
X    ?    This lists help for the query replacement command
X@end(verbatim)
X
XPractice searching and searching and replacing until you feel
Xcomfortable with the commands and their effects.
X@begin(group)
X@heading(Chapter @value(chapter) Summary)
X
XIn this chapter, you learned how to search for specified strings of text
Xin EMACS.  The chapter also dealt with searching for and replacing
Xelements within a buffer.
X
X@begin(verbatim)
X@u(Key Binding        Keystroke             Effect)
X
XSearch-Forward        @b{^S}    Searches from point to end of buffer.
X                Point is moved from current location to
X                the end of the found string
X
XSearch-Backward        @b{^R}    Searches from point to beginning of buffer.
X                Point is moved from current location to
X                beginning of found string
X
XReplace            @b{M-R} Replace ALL ocurrences of search string with
X                specified (null) string from point to the
X                end of the current buffer
X
XQuery-Replace           @b{M-^R}    As above, but pause at each found string
X                and query for action
X@end(verbatim)
X@end(group)
X@chapter(Windows)
X
X@section<Creating Windows>@index{Windows, Creating}
X
XWe have already met windows in an earlier chapter.  In this chapter, we
Xwill explore one of EMACS' more powerful features -- text manipulation
Xthrough multiple windowing.  Windows offer you a powerful and easy way
Xto edit text.  By manipulating a number of windows and buffers on the
Xscreen simultaneously, you can perform complete edits and revisions on
Xthe computer screen while having your draft text or original data
Xavailable for reference in another window.
X
XYou will recall that windows are areas of buffer text that you can see
X@index(windows) on the screen.  Because EMACS can support several screen
Xwindows simultaneously you can use them to look into different places in
Xthe same buffer.  You can also use them to look at text in different
Xbuffers.  In effect, you can edit several files at the same time.
X
XLet's invoke EMACS and pull back our file on desktop publishing by
Xtyping
X
X@quotation<emacs publish.txt>
X
XWhen the text appears, type the @b{^X-2} @i(split-window)
X@index{split-window} command.  The window splits into two windows.  The
Xwindow where the cursor resides is called the @b<current> window -- in
Xthis case the bottom window.  Notice that each window has a text area
Xand a mode line.  The @b(command line) @index{command line} is however,
Xcommon to all windows on the screen.
X
XThe two windows on your screen are virtually mirror images of each other
Xbecause the new window is opened into the same buffer as the one you are
Xin when you issue the @i{open-window command} @index{open-window}.  All
Xcommands issued to EMACS are executed on the current buffer in the
Xcurrent window.
X
XTo move the cursor to the upper window (i.e., to make that window the
Xcurrent window, type @b{^X-P} @i(previous-window) @index{previous-window}.
XNotice the cursor
Xmoves to the upper or @b<previous> window.  Entering @b{^X-O}
X@i(next-window) moves to the @b{next} window.  Practice moving between
Xwindows.  You will notice that you can also move into the Function Key
Xmenu by entering these commands.
X
XNow move to the upper window.  Let's open a new file.  On the EMACS disk
Xis a tutorial file.  Let's call it into the upper window by typing:
X
X@quotation<^X-^F>
X
Xand press return.
X
XEnter the filename @b<emacs.tut>.
X
XIn a short time, the tutorial file will appear in the window.  We now have
Xtwo windows on the screen, each looking into different buffers.  We have
Xjust used the @b(^X-^F) @i(find-file) @index{find-file}
Xcommand to find a file and bring
Xit into our current window.
X
XYou can scroll any window up and down with the cursor keys, or with the
Xcommands we've learned so far.    However, because the area of visible
Xtext in each window is relatively small, you can scroll the current
Xwindow a line at a time.
X
XType @b{^X-^N} @i(move-window-down)@index{move-window-down}
X
XThe current window scrolls down by one line -- the top line of text
Xscrolls out of view, and the bottom line moves towards the top of the
Xscreen.  You can imagine, if you like, the whole window slowly moving
Xdown to the end of the buffer in increments of one line.  The command
X@b{^X-^P} @i(move-window-up)@index{move-window-up}
Xscrolls the window in the opposite
Xdirection.
X
XAs we have seen, EMACS editing commands are executed in the current
Xwindow, but the program does support a useful feature that allows you to
Xscroll the @b<next> window.
X@b<M-^Z> @i(scroll-next-up)@index{scroll-next-up}
Xscrolls the next
Xwindow up, @b{M-^V} @i(scroll-next-down)@index{scroll-next-down}
Xscrolls it downward.  From the
Xtutorial window, practice scrolling the window with the desktop
Xpublishing text in it up and down.
X
XWhen you're finished, exit EMACS without saving any changes in your
Xfiles.
X
X
XExperiment with splitting the windows on your screen.  Open windows into
Xdifferent buffers and experiment with any other files you may have.  Try
Xediting the text in each window, but
Xdon't forget to save any changes you want to keep -- you still have to
Xsave each buffer separately.
X
X@section(Deleting Windows)@index{Windows, Deleting}
XWindows allow you to perform complex editing tasks with ease.  However,
Xthey become an inconvenience when your screen is cluttered with open
Xwindows you have finished using.  The simplest solution is to delete
Xunneeded windows.  The command @b{^X-0} @i{delete-window}
Xwill delete the window you are currently working in and move you to the
Xnext window.
X
XIf you have a number of windows open, you can delete all but the current
Xwindow by entering @b{^X-1} @i{delete-other-windows}.
X
X@section(Resizing Windows)@index{Windows, Resizing}
X
XDuring complex editing tasks, you will probably find it convenient to
Xhave a number of windows on the screen simultaneously.  However this
Xsituation may present inconveniences because the more windows you have
Xon the screen the smaller they are; in some cases, a window may show
Xonly a couple of lines of text.  To increase the flexibility and utility
Xof the window environment, EMACS allows you to resize the window you are
Xworking in (called, as you will recall, the @b<current> window) to a
Xconvenient size for easier editing, and then shrink it when you no
Xlonger need it to be so large.
X
XLet's try an example.  Load in any EMACS text file and split the current
Xwindow into two.  Now type @b{^X-^(Shift-6)},
X@i{grow-window}@index{grow-window}.  Your current window should be
Xthe lower one on the screen.  Notice that it increases in size upwards
Xby one line.  If you are in the upper window, it increases in size in a
Xdownward direction.  The command @b{^X-^Z},
X@i{shrink-window}@index{shrink-window} correspondingly decreases window
Xsize by one line at a time.
X
XEMACS also allows you to resize a window more precisely by entering a
Xnumeric argument specifying the size of the window in lines.  To resize
Xthe window this way, press the META key and enter a numeric argument
X(remember to keep it smaller than the number of lines on your screen
Xdisplay) then press @b{^X-W} @i{resize-window}@index{resize-window}.
XThe current window will be enlarged or shrunk to the number of lines
Xspecified in the numeric argument.  For example entering:
X
X@quotation{@b[M-8 ^X-W]}will resize the current window to 8 lines.
X
X@section(Repositioning within a Window)
X
XThe cursor may be centered within a window by entering @b{M-! or M-^L}
X@i{redraw-display} @index{redraw-display}.  This command is especially
Xuseful in allowing you to quickly locate the cursor if you are moving
Xfrequently from window to window.  You can also use this command to move
Xthe line containing the cursor to any position within the current
Xwindow.  This is done by using a numeric argument before the command.
XType @b(M-<n> M-^L) where <n> is the number of the line within the
Xwindow that you wish the current line to be displayed.
X
XThe @b{^L} @i{Refresh-screen} @index{refresh-screen} command is useful
Xfor 'cleaning up' a 'messy' screen that can result of using EMACS on a
Xmainframe system and being interupted by a system message.
X@newpage
X@u<Chapter @value(chapter) summary>
X
XIn Chapter @value(chapter) you learned how to manipulate windows and the
Xediting flexibility they offer.
X
X@begin(verbatim)
X@u(Key Binding    Keystroke    Effect)
X
XOpen-Window    @b{^X-2}    Splits current window into two windows if
X                space available
X
XClose-Windows    @b{^X-1}    Closes all windows except current window
X
XNext-Window    @b{^X-O}[oh]    Moves point into next (i.e. downward) window
X
XPrevious-Window @b{^XP}        Moves point to previous (i.e. upward) window
X
XMove-Window-Down @b{^X-^N}    Scrolls current window down one line
X
XMove-Window-Up    @b{^X-^P}    Scrolls current window up one line
X
XRedraw-display    @b{M !} or    Window is moved so line with point
X        @b{M ^L}    (with cursor) is at center of window
X
XGrow-Window    @b{M-X ^} or    Current window is enlarged by one
X        @b{M ^L}    line and nearest window is shrunk by
X                one line
X
XShrink-Window    @b{^X-^Z}    Current window is shrunk by one line
X                and nearest window is enlarged by one line
X
XClear-and-redraw @b{^L}        Screen is blanked and redrawn.  Keeps
X                screen updates in sync with your commands
X
XScroll-Next-Up    @b{M-^Z}    Scrolls next window up by one line
X
XScroll-Next-Down @b{M-^V}    Scrolls next window down by one line
X
XDelete-Window    @b{^X-0}    Deletes current window
X
XDelete-Other-Windows @b{^X-1}    Deletes all but current window
X
XResize-Window    @b{^X-^W}    Resizes window to a given numeric argument
X@end(verbatim)
X@chapter(Buffers)
X
X@index(buffer) We have already learned a number of things about buffers.
XAs you will recall, they are the major internal entities in EMACS -- the
Xplace where editing commands are executed.  They are characterized by
Xtheir @b<names>, their @b<modes>, and by the file with which they are
Xassociated.  Each buffer also "remembers" its @b(mark) and @b(point).
XThis convenient feature allows you to go to other buffers and return to
Xthe original location in the "current" buffer.
X
XAdvanced users of EMACS frequently have a number of buffers in the
Xcomputer's memory simultaneously.  In the last chapter, for example, you
Xopened at least two buffers -- one into the text you were editing, and
Xthe other into the EMACS on-line tutorial.  If you deal with complex
Xtext files -- say, sectioned chapters of a book, you may have five or
Xsix buffers in the computer's memory.  You could select different
Xbuffers by simply calling up the file with @b{^X-^F} @i(find-file)
X@index(find-file), and let EMACS open or reopen the buffer.  However,
XEMACS offers fast and sophisticated buffering techniques that you will
Xfind easy to master and much more convenient to use.
X
XLet's begin by opening three buffers.  You can open any three you
Xchoose, for example call the following files into memory: @b(fang.txt),
X@b(publish.txt), and @b(emacs.tut) in the order listed here.  When
Xyou've finished this process, you'll be looking at a screen showing the
XEMACS tutorial.  Let's assume that you want to move to the fang.txt
Xbuffer.  Enter:
X
X@b{^X-X} @i(next-buffer) @index(next-buffer)
X
XThis command moves you to the @u<next> buffer.  Because EMACS cycles
Xthrough the buffer list, which is alphabetized, you will now be in the
X@b(fang.txt) buffer. Using @b(^X-X) again places you in the
X@b(publish.txt) buffer. @i(If you are on a machine that supports
Xfunction keys, using @b[^X-X] again places you in the @b(Function Keys)
Xbuffer). Using @b(^X-X) one last time cycles you back to the beginning
Xof the list.
X
XIf you have a large number of buffers to deal with, this cycling process
Xmay be slow and inconvenient.  The command @b{^X-B} @i(select-buffer)
X@index(select-buffer) allows you to specify the buffer you wish to be
Xswitched to.  When the command is entered, EMACS prompts, "Use buffer:".
XSimply enter the buffer name (NOT the file name), and that buffer will
Xthen become the current buffer.
X
XMultiple buffer manipulation and editing is a complex activity, and you
Xwill probably find it very inconvenient to re-save each buffer as you
Xmodify it.  The command @b{^X-^B} @i(list-buffers) @index(list-buffers)
Xcreates a new window that gives details about all the buffers currently
Xknown to EMACS.  Buffers that have been modified are identified by the
X"buffer changed" indicator (an asterisk in the second column).  You can
Xthus quickly and easily identify buffers that need to be saved to files
Xbefore you exit EMACS.  The buffer window also provides other
Xinformation -- buffer specific modes, buffer size, and buffer name are
Xalso listed.  To close this window, simply type the close-windows
Xcommand, @b{^X-1}.
X
XTo delete any buffer, type @b{^X-K} @i(delete-buffer)
X@index(delete-buffer).  EMACS prompts you "Kill buffer:".  Enter the
Xbuffer name you want to delete.  As this is destructive command, EMACS
Xwill ask for confirmation if the buffer was changed and not saved.
XAnswer Y(es) or N(o).  As usual @b{^G} cancels the command.
X
X@newpage
X@heading(Chapter @value(chapter) Summary)
X
XIn Chapter @value(chapter) you learned how to manipulate buffers.
X
X@begin{verbatim}
X@u(Key Binding        Keystroke               Effect)
XNext-Buffer        @b(^X-^X)    Switch to the next buffer in the
X                    buffer list
X
XSelect-Buffer        @b(^X-B)    Switch to a particular buffer
X
XList-Buffers        @b(^X-^B)    List all buffers
X
XDelete-Buffer        @b(^X-K)    delete a particular buffer if it
X                    is off-screen
X@end(verbatim)
X@chapter(Modes)
X
X    EMACS allows you to change the way it works in order to
Xcustomized it to the style of editing you are using.  It does this by
Xproviding a number of different @b(modes) @index(modes).  These modes
Xcan effect either a single buffer, or any new buffer that is created.
XTo add a mode to the current buffer, type @b(^X-M) @i(add-mode)
X@index(add-mode).  EMACS will then prompt you for the name of a mode to
Xadd.  When you type in a legal mode name, and type a <NL>, EMACS will
Xadd the mode name to the list of current mode names in the modeline of
Xthe current buffer.
X
X    To remove an existing mode, typing the @b(^X-^M) @i(delete-mode)
X@index(delete-mode) will cause EMACS to prompt you for the name of a
Xmode to delete from the current buffer.  This will remove that mode from
Xthe mode list on the current modeline.
X
X    Global modes are the modes which are inherited by any new
Xbuffers which are created.  For example, if you wish to always do string
Xsearching with character case being significant, you would want global
Xmode EXACT to be set so that any new files read in inherent the EXACT
Xmode.  Global modes are set with the @b(M-M) @i(add-global-mode)
X@index(add-global-mode) command, and unset with the @b(M-^M)
X@i(delete-global-mode) @index(delete-global-mode) command.  Also, the
Xcurrent global modes are displayed in the first line of a
X@b(^X-^B) @i(list-buffers) @index(list-buffers) command.
X
X    On machines which are capable of displaying colors,
X@index(color) the mode commands can also set the background and
Xforeground character colors.  Using @i(add-mode) or @i(delete-mode) with
Xa lowercase color will set the background color in the current window.
XAn uppercase color will set the foreground color in the current window.
XColors that EMACS knows about are: white, cyan, magenta, yellow, blue,
Xred, green, and black.  If the computer you are running on does not have
Xeight colors, EMACS will attempt to make some intelligent guess at what
Xcolor to use when you ask for one which is not there.
X
X@section(ASAVE mode)@index(ASAVE mode)
X
X    Automatic Save mode tells EMACS to automatically write out the
Xcurrent buffer to its associated file on a regular basis.  Normally this
Xwill be every 256 characters typed into the file.  The environment
Xvariable $ACOUNT counts down to the next auto-save, and $ASAVE is the