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  • Behind the scenes: Livin’ la Vida Emacs
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Behind the scenes: Livin’ la Vida Emacs

In October 2006, I gave a short presentation on Livin’ la Vida Emacs (or the Emacs editor as a way of life). It was well-received—in fact, so well-received that folks in the audience anticipated my punchlines and I ended up shifting parts of my talk around. ;)

People said:

Last, and certainly not least was Sacha Chua. If we could harness it I’m pretty sure we could power a few small cities of the energy that’s contained in this one, tiny person – especially when you get her talking about Emacs. Sacha’s demo, entitled, “Livin’ la vida Emacs” was hands down the most entertaining of the evening. Sacha has basically taken this simple, extendable text editor and pushed it about as far as it can go – at DemoCamp10 she pulled back the curtain and showed us all her little systems and apps she’s created in it. I like my GUI/Windows so the whole text-based thing isn’t for me but it certainly was interesting to see just how strung out she’s got that machine.

Ryan Coleman

Sacha Chua showed off what can be done in the scriptable environment, in this case emacs, as she went from Text editor, to a.i. doctor, to game engine to task / email organizer and beyond. Sacha was six feet tall on that stage, even though she did not actual levitate at anytime (although she came close, as always). A Tour de force of the Emacs, a text editing tool built in a interpreted lisp language environment, bascially a personalized productivity platform which allows for massive customization. Sacha had the crowd entertained and enthralled. (Sacha blogged her own impressions and mentions that Emacs was speaking to her!)

Ian Irving

Within Toronto’s Web community, Sacha Chua has become one of the leading “personalities”. Armed with infectious enthusiasm, charm and smarts, she would be an excellent person to hire once she graduates from UoT. The key question is how best to use her talents. It would probably be as a customer service rep, who can come into a bad situation and get everyone happy by the time she leaves. If I was an HR person from Microsoft, IBM, etc. I’d be knocking on Sacha’s door ASAP.

Mark Evans, consultant

Why? Probably because in addition to my natural sugar high, I was also presenting something that was awesomely, arcanely geeky. =)

I hadn’t figured out how to make a screencast on Linux, so the actual display on my screen is lost to time. I do, however, have the source code that I used to step through my speech–including speaking cues, as I didn’t want to mess up the presentation in front of Toronto’s technorati! So here’s the source code, for your amusement. I set up two of my function keys to go forward and backward, executing the parenthesized expressions. I also set up a hidden window that could handle my speaking cues so that Emacs could remind me what the next “slide” was before I transitioned to it, for smoother flow. emacspeak-speak-buffer is a function that reads the current window’s text using the Emacspeak speech interface with the Festival synthesizer I’d configured. At some point, I switched to a more interactive demo, but I still had the speaking cues remind me of the sequence. So yes, Emacs really was telling me what to say. ;)

;; Emacs as a text editor

(progn ;; Setup
  (defvar democamp/presentation-file "~/democamp.el")
  (defvar democamp/cue-buffer "*DemoCamp*")
  (defun democamp/next ()
    (interactive)
    (let (start sexp)
      (with-current-buffer (find-file-noselect democamp/presentation-file)
        (setq start (point))
        (forward-sexp)
        (setq sexp (buffer-substring-no-properties start (point))))
      (eval (read sexp))))
  
  (defun democamp/previous ()
    (interactive)
    (let (start sexp)
      (with-current-buffer (find-file-noselect democamp/presentation-file)
        (setq start (point))
        (backward-sexp)
        (setq sexp (buffer-substring-no-properties (point) start)))
      (eval (read sexp))))

  (defun democamp/repeat ()
    (interactive)
    (let (start sexp)
      (with-current-buffer (find-file-noselect democamp/presentation-file)
        (setq start (point))
        (backward-sexp)
        (setq sexp (buffer-substring (point) start))
        (forward-sexp))
      (eval (read sexp))))
  
  (defun democamp/say (text)
    (with-current-buffer (get-buffer-create democamp/cue-buffer)
      (erase-buffer)
      (insert text)
      (goto-char (point-min))
      (call-interactively 'emacspeak-speak-buffer)))
  (global-set-key (kbd "<f12>") 'democamp/next)
  (global-set-key (kbd "S-<f12>") 'democamp/previous)
  (global-set-key (kbd "C-<f12>") 'democamp/repeat)  
)

;; Window register a
(progn
  (menu-bar-mode 1)
  (tool-bar-mode 1)
  (set-face-attribute 'default nil :height 200)
  (find-file "~/hello.txt")
  (democamp/say "I don't know why people are so intimidated by Emacs. It's a text editor. It has menus and toolbars and everything.")
  (frame-configuration-to-register ?a)) 

(progn
  (democamp/say "Spell-check, too.")
  (load-library "flyspell")
  (load-library "emacspeak-flyspell")
  (setq emacspeak-flyspell-highlight-personality nil)
  (flyspell-mode 1))


;; Emacs learning curve
;; Frame configuration b
(progn
  (find-file "~/tmp/learningcurves.jpg")
  (democamp/say "So why are people terrified of Emacs?"))

(progn
  (set-face-attribute 'default nil :height 700)
  (delete-other-windows)
  (sit-for 1)
  (animate-sequence (list "Livin' la Vida Emacs" "DemoCamp10" "Sacha Chua" "Oct 23, 2006") 1))

(progn
  (set-face-attribute 'default nil :height 200)
  (democamp/say "Emacs comes with a psychotherapist.")
  (doctor))
(progn
  (democamp/say "an adventure game")
  (dunnet))
(progn
  (democamp/say "random geek stuff")
  (hanoi 3))
(progn
  (democamp/say "even Snake")
  (delete-other-windows)
  (snake))
(progn
  (democamp/say "And of course, my favorite game, Nethack.")
  (load-library "nethack-config")
  (nethack))
(democamp/say "Some of it is useful")
;; Flashcard
(progn
  (democamp/say "Flashcards")
  (load-library "flashcard-config")
  (find-file "~/notebook/japan/japanese.deck")
  (goto-char (point-max)))
;; With fortunes
(progn
  (democamp/say "And you can mash things together")
  (load-library "fortune")
  (setq fortune-file "/usr/share/games/fortunes/computers")
  (fortune)
  (delete-other-windows))
(progn
  (find-file-other-window "~/notebook/japan/japanese.deck")
  (goto-char (point-max)))

;; Planner
(democamp/say "Now the wild stuff starts.")
(progn
  (planner-goto-today)
  (delete-other-windows)
  (democamp/say "Emacs: more than just an editor. It's a way of life."))

;; - Show tasks
(democamp/say "I use Emacs to manage my tasks with Planner.")
(democamp/say "I can even keep detailed time logs!")
(progn
  (load-library "/usr/src/planner-el/planner-timeclock-summary.el")
  (planner-timeclock-summary-show (planner-today)))

;; - Show notes
(democamp/say "... blog...")
;; - Jump to URL in w3m
(democamp/say "... surf the Web (with tabbed browsing and a custom keymap!)")
33;; - Jump to URL in Firefox
(democamp/say "Although sometimes you really want Firefox.")
;; - Jump to task from mail message
(democamp/say "I can hyperlink to pretty much anything.")
(democamp/say "People's contact information")
(democamp/say "E-mail, etc.")
(democamp/say "Which comes in handy when I need to create tasks from mail messages.")
;; Add note to BBDB from mail message
(progn
  (democamp/say "Keeping track of the number of recipients")
  (planner-visit-link "pos://~/.gnus#19820"))
(democamp/say "BBDB indicators")

;; Reply to message with nickname,
(progn
  (democamp/say "CRM in e-mail: Nicknames...")
  (planner-visit-link "pos://~/.gnus#16025"))

;; and show how it shows up in BBDB record and ping code
(progn
  (democamp/say "... notes...")
  (planner-visit-link "pos://~/.gnus#18804"))

(progn
  (democamp/say "... pings...")
  (planner-visit-link "pos://~/.gnus#16932"))

(democamp/say "... filters...")
(democamp/say "So those are just a few examples of the crazy stuff you can do if you have an infinitely tweakable environment.")
(democamp/say "Sacha, remember to plug in the speakers.")
(democamp/say "Demo Campers, welcome to Emacs. What else do you want it to do?")

I love pushing the envelope. I love getting to know my tools inside and out (I enjoy reading source code!) and then making them do things other people can’t imagine. I love tweaking processes in real life, too, making them better and better every time. That’s just part of the way I work have fun. =)

How can you rock your next technical demo?

Emacs and a British voice

There’s something about deep, deep cultural programming. Anything
spoken with a British accent just sounds infinitely cool. Everyone
uses the default voice for Asterisk and all of that – an American
male.

You want to install festvox-rablpc16k or festvox-rablpc8k in addition
to all the usual things you need for emacspeak. You’ll also need
espeakf from CVS.

cvs -d:pserver:[email protected]:/cvsroot/espeakf login
cvs -z3 -d:pserver:anonymous@espeakf.cvs.s[email protected]:/cvsroot/espeakf co -P espeakf
cd espeakf
sudo make install

One of these lines is responsible for setting up espeakf. I just can’t
be bothered with figuring out which. ;) Probably the dtk-program line.

(setq dtk-program "/usr/share/emacs/site-lisp/emacspeak/servers/espeakf.pl")
(setenv "DTK_TCL" dtk-program)
(setenv "DTK_PROGRAM" dtk-program)

Then add this to your /etc/festival.scm:

(set! voice_default 'voice_rab_diphone)

Yummy British accent goodness.

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