• Emacs developed by Richard Stallman

• The name is short for Editor Macros

• XEmacs split to enhance GUI elements

• Very similar but some packages work with one or the other

• Console and Graphical modes

• Core written in C

• Core includes ELisp Interpreter

  	Note
  	For the remainder of this presentation, I will refer to ELisp simply as Lisp.

• Most of the functionality is written in lisp

• Customize with lisp

• Idea is to make command mnemonic

• Chording commands

• Ctrl written as C

• Meta Written as M

• Esc works as Meta but sometimes Alt does as well

• Either love or hate chording

• Chording works same in console and gui mode

• XEmacs separates buffers from files

• Buffers are transient and in memory

• Editing is done on buffers

• Buffers are saved to files

• Can have a buffer without a file

• Can have multiple buffers open simultanously

• XEmacs starts in the buffer <code>*scratch*</code>

Enough Lisp to be Dangerous

• Atoms

• Lists

• Symbols

• Symbolic expression, S-expressions, sexp

• <code>(function arg1 arg2 ... )</code>

• <code>(print "hello world" (get-buffer "*scratch*"))</code>

  How many functions are in this list?

• Quoting prevents evaluation

  (setq default-major-mode 'text-mode  )
               

  The quote operator (<code>'</code>) prevents <code>text-mode</code> from being evaluated.

• Functions can also be arguments

• This leads to a highly dynamic form of programming

• All functions can be evaluated from a buffer.

• Some Functions can be entered interactively.

• The function <code>current-time-string</code> provides the required information. If it is evaluated with <code>eval-print-last-sexp</code> it inserts the information, but with quotes.

  (current-time-string)C-j
  "Wed May 31 09:41:29 2006"
  

• We can write a function to do what we want, which is insert rather than print

  (defun insert-current-time-string ()
    "Insert the current time at point"
    (insert (current-time-string)))C-x C-e
  

  (insert-current-time-string)C-x C-e Wed May 31 09:58:31 2006
  

• Now if we want call the function interactivly we need to add the <code>interactive</code> declaration.

  (defun insert-current-time-string ()
    "Insert the current time at point"
    (interactive)
    (insert (current-time-string)))C-x C-e
  

  M-x insert-current-time-string
  

• Lets bind it to a key to reduce typing

  (global-set-key 'f5 insert-time-string)C-x C-e
  

• If interactivity is not required we can do it all in one step with a <code>lambda</code> (anonymous) function.

  (global-set-key 'f5 
       (lambda () (insert (current-time-string)))C-x C-e
  

• Works for C and C++

• Highly customizable

• M-x compile

• Jump to next compile error C-x `

• Can identify syntax errors

• Try M-x function-menu

• To add the function menu permantly put this in your .emacs file.

  (require 'func-menu)
  (add-hook 'find-file-hooks 'fume-add-menubar-entry)
  

• AUCTEX is a sopistocated document editing system for TEX systems. It is available from the AUCTEX Homepage

• The most current version is not yet available for automatic installation. So this is how to install it manually.

• Download and verify the XEmacs package

  $ cd $HOME/dist
  $ wget -nv http://ftp.gnu.org/pub/gnu/auctex/auctex-11.82-pkg.tar.gz
  14:51:47 URL:http://ftp.gnu.org/pub/gnu/auctex/auctex-11.82-pkg.tar.gz [870092/870092] -> \
    "auctex-11.82-pkg.tar.gz" [1]
  
  $  wget -nv http://ftp.gnu.org/pub/gnu/auctex/auctex-11.82-pkg.tar.gz.sig
  14:52:35 URL:http://ftp.gnu.org/pub/gnu/auctex/auctex-11.82-pkg.tar.gz.sig [65/65] -> \
    "auctex-11.82-pkg.tar.gz.sig" [1]
  
  $ gpg --verify auctex-11.82-pkg.tar.gz.sig
  gpg: Signature made Mon Jan 16 10:03:42 2006 EST using DSA key ID 3C6B854E
  gpg: Good signature from "Reiner Steib <reiner.steib@gmx.de>"
  gpg: WARNING: This key is not certified with a trusted signature!
  gpg:          There is no indication that the signature belongs to the owner.
  Primary key fingerprint: FDC7 BB69 6D06 D80F 4412  BFD0 E222 255A 3C6B 854E
  

• Default Package Heirarchies

  • Local and 3rd party packages <code>$prefix/lib/xemacs/site-packages</code>

  • MULE-enabled XEmacsen <code>$prefix/lib/xemacs/mule-packages</code>

  • Normal packages <code>$prefix/lib/xemacs/xemacs-packages</code>

  • User packages <code>$HOME/.xemacs/xemacs-packages</code>

• Unpack the package

  $ cd $HOME/.xemacs
  $ mkdir xemacs-packages
  $ gunzip -c $HOME/dist/auctex-11.82-pkg.tar.gz | tar -xf -
  $ ls
  etc  info  lisp  man  pkginfo
  

  For more information see the XEmacs Manual

• Make the LaTeX files available.

  $ cd $HOME/texmf/tex/latex
  $ ln -s /home/gdowdin/.xemacs/xemacs-packages/etc/auctex/latex auctex
  

• Open a LaTeX File for some Eye Candy

  

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