Subtitles for talk 22

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-WEBVTT
-
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-oh you are now muted
-
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-all right then well uh hello everyone
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-I hope uh you're all enjoying the Emacs
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-conf
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-my name is musa alhassi and I hope
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-you're
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-excited to learn about uh powering up
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-special blocks
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-um so let's let's first off uh find out
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-what these special blocks are and
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-and see what we can uh go from so
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-uh yesterday I saw a lot of cool talks
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-and uh people were chatting about how do
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-you
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-I know how should you present should you
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-do it this way or that way and
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-I thought maybe I should try a different
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-way uh but but I'm talking about special
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-blocks and if I
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-show you an emax then I have to export
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-the html so you can see what it looks
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-like
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-or export to a pdf so you can see what
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-it looks like
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-uh so I ended up writing an org reveal
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-and
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-joyously this this just works you can
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-you can just see things here
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-uh I was worried that I'd have to take
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-pictures and then you know
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-uh uh you know insert pings so that that
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-was a delight
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-okay uh so special blocks are these
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-things like
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-a center small quote uh that's what a
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-special block is
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-and with a bit of lisp we can we can
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-make special blocks
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-and link types right so uh using a
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-single interface
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-um and the interface is going to be
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-similar to one
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-many people are familiar with in
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-particular org babel's
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-source interface as well as using global
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-header arguments for link types
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-and the idea is to write it once and
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-generate many different kinds
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-right you write uh an org markup and you
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-can have
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-uh html you can have pdf and and
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-joyously
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-uh org reveal so that was uh that was an
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-unexpected delight
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-um so here is a few that you'll you'll
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-just see as we
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-uh in this presentation you know some uh
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-uh I won't show some of these uh link
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-only ones
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-but we'll see a few of these other ones
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-just to make the uh
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-presentation look nice so the
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-presentation is really going to
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-present these blocks and the mechanism
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-at the same time
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-so uh so this no no html was written
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-look ma no html just pure org mode and
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-and
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-you get all these beautiful boxes and
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-things okay
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-so the motivation for this is you know
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-what uh
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-you're you're online you run into a blog
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-and you see something you like and
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-you're like man
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-you know I wish I could uh you know
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-produce that
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-um uh but you you check in the author
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-wrote raw
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-html you know plus html everywhere
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-and uh that's that's you know gonna
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-obscure
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-your your real content it's going to be
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-surrounded by all this uh
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-styling information that's unfortunate
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-uh the author decides to use an org
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-macro all right a bit better
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-but then what if you decide hey I want
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-to make a
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-not pdf great and then the worst of all
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-the author doesn't give you the source
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-and then you have to view page source
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-and
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-learn cascading style sheets and and you
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-know
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-sit in a corner and cry decide to do
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-other things with your life
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-so uh we want to give you org users
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-numerous styles
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-and uh and an extensible mechanism to
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-add more of these
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-aesthetically pleasing styles you know
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-to have really nice things
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-look one way in the html and look almost
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-the same way
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-in the pdf and other uh back ends and
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-if by having these newer ones you know
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-people
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-might be encouraged to try making new
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-ones
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-especially when the interface is uh not
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-so difficult
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-uh that's the that's the aim okay
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-uh so let's let's have a a real story to
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-motivate this even more
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-um so here's three friends uh I hope I
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-don't butcher their names but these
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-friends are called
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-amin sasha and corwin and then they're
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-organizing a conference
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-uh EmacsConf 2020.
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-so sasha decides to write an org file
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-and and she would like some feedback
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-okay and and just uh make it clear
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-there's no
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-uh just how easy this looks
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-let's look at the source for this block
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-notice it's just the word green then a
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-colon
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-than amine uh so no
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-no div style coloring just just you know
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-green color
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-immune a very pleasant uh or markup
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-so that's that's quite nice put some
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-bold around it
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-not not too difficult so hopefully uh
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-this will be useful to
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-other people as well so what kind of
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-feedback
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-uh would sasha expect to get um so maybe
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-she would expect top level remarks
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-visible
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-in the export you know when she makes an
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-html she can see right there a big block
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-right maybe
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-amin will suggest to sasha please
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-replace this part
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-with this other part or replace this
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-word with this other word
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-right um this is not really possible
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-with raw
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-html or uh yeah or with even latex
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-you'd have to have multiple arguments
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-the first argument and then
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-the replacement argument and it's a bit
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-clunky
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-um but with our setup you just write
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-some text
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-write hashtag plus replace with and then
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-write more text and you're good to go
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-normal uh org markup um
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-everyone speaks different languages
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-maybe they want to use a
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-uh one word or they're arguing about
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-whether we talk about frames or windows
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-um so maybe they want to have some
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-translations
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-right so there's different kinds of
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-feedbacks uh let's let's take an example
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-uh look at what they are okay
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-uh so for example sasha might write
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-uh this org mode right here and uh
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-and then in her html exports you might
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-see this
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-and uh her feedback might look really
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-nicely from anyone who says you know
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-let's uh
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-let's do some lisp instead of uh
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-mathematics let's just do some list
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-and and corwin says you know let's let's
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-not be so silly
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-maybe let's just say 9 a.m and move on
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-okay
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-um so amin likes to export to pdf
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-and so he writes his top-level remarks
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-using latex that's how
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-so to get this uh square I mean please
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-change whatever
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-he might write like this hashtag you
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-know plus latex
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-hashtag plus latex right but then
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-sasha only exports to p to html uh for
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-example
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-um and uh so she doesn't look at the pdf
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-and she may not see his top-level
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-feedback you know with those nice
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-brackets and
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-and bold right and so she might think
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-everything's good
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-right and that can be a bit disastrous
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-um so maybe sasha will will then uh make
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-some
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-of her own feedback all right uh but
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-and to produce it she might write html
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-uh
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-um html commands hashtag plus html to
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-get that
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-uh but then amin will make a pdf and
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-this won't stick out
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-and then so he might think everything's
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-okay even even though it's not
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-um then corwin actually decides hey
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-uh let me read the exported result and
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-these
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-there's all those feedback from two
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-people who haven't uh
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-read anything because maybe they were in
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-a russian and didn't
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-see the top level feedback and so they
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-agree hey let's have a uniform org
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-interface that exports
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-to both html and pdf make both of us
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-happy
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-okay so they decide to use org special
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-blocks
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-right um and to set this up they need to
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-you know maybe read a little bit of lisp
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-hooks
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-advice macros to get all of this set up
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-and then they'll use org as the main
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-interface okay
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-it's a lot of work but it's worth it
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-right maybe
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-um but then corwin corbin's a bit tears
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-so
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-uh corwin maybe doesn't want to write
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-uh using blocks he thinks they're
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-overkill and
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-and sasha wants html and uh and
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-I mean wants pdf and corwin wants org
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-reveal
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-so now they have to reformat all their
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-code and then they need to use org link
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-types to
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-reduce the overkill all right so they
-
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-can try to avoid duplication by
-
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-factoring things out into self-contained
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-uh defined functions or defunds
-
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-um but now to set up or links
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-uh we'll have uh to learn a new
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-interface
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-org setup link um learn a little bit
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-about fonts
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-follow links exports handles
-
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-it's so much that's so much but but then
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-you know the friends they learn a lot
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-you know they learn about defund all
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-right so these these words are red
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-you get a little explanation I think
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-it's a bit too small for anyone to read
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-this is lisp documentation right for
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-defund
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-advice ad there's some list
-
-00:09:19.680 --> 00:09:21.600
-documentation right
-
-00:09:21.600 --> 00:09:23.600
-they learn about destructuring let's so
-
-00:09:23.600 --> 00:09:25.279
-this is from the dash library
-
-00:09:25.279 --> 00:09:26.959
-here's all that you know glorious
-
-00:09:26.959 --> 00:09:28.800
-glorious documentation with examples
-
-00:09:28.800 --> 00:09:29.360
-sorry
-
-00:09:29.360 --> 00:09:31.680
-I like that they might make an ad-hoc
-
-00:09:31.680 --> 00:09:33.760
-mechanism to simulate
-
-00:09:33.760 --> 00:09:36.000
-arguments for special blocks so
-
-00:09:36.000 --> 00:09:37.040
-something maybe called
-
-00:09:37.040 --> 00:09:40.399
-extract arguments and then of course to
-
-00:09:40.399 --> 00:09:41.920
-make new link types they have to learn
-
-00:09:41.920 --> 00:09:42.480
-about
-
-00:09:42.480 --> 00:09:45.120
-org link set parameters and then it's
-
-00:09:45.120 --> 00:09:46.480
-numerous uh
-
-00:09:46.480 --> 00:09:49.920
-bits and pieces all right so let's oh
-
-00:09:49.920 --> 00:09:50.720
-let's uh
-
-00:09:50.720 --> 00:09:53.600
-close all these ones down and and uh of
-
-00:09:53.600 --> 00:09:55.040
-course they also need to be uh
-
-00:09:55.040 --> 00:09:56.080
-comfortable with
-
-00:09:56.080 --> 00:09:58.720
-uh loops and maps and matching and
-
-00:09:58.720 --> 00:09:59.920
-string functions
-
-00:09:59.920 --> 00:10:02.560
-so it's it's a bit of a pain it's a bit
-
-00:10:02.560 --> 00:10:03.360
-of a pain
-
-00:10:03.360 --> 00:10:05.839
-um so it's probably not worth it so
-
-00:10:05.839 --> 00:10:06.560
-maybe I'll just
-
-00:10:06.560 --> 00:10:09.360
-rush things quickly or do an ad hoc you
-
-00:10:09.360 --> 00:10:10.320
-know
-
-00:10:10.320 --> 00:10:13.680
-we have things to do right
-
-00:10:13.680 --> 00:10:15.920
-so maybe maybe the squad wants to have a
-
-00:10:15.920 --> 00:10:17.839
-modular
-
-00:10:17.839 --> 00:10:21.120
-and unified interface so everyone's
-
-00:10:21.120 --> 00:10:23.040
-comfortable with defunct to define a
-
-00:10:23.040 --> 00:10:25.279
-function and they say you know what
-
-00:10:25.279 --> 00:10:26.480
-it would be nice if we could just you
-
-00:10:26.480 --> 00:10:29.440
-know define simultaneously
-
-00:10:29.440 --> 00:10:32.959
-both a block and the link type right
-
-00:10:32.959 --> 00:10:34.880
-and uh that way we have a single
-
-00:10:34.880 --> 00:10:36.000
-interface
-
-00:10:36.000 --> 00:10:38.240
-org mode for for these things and it
-
-00:10:38.240 --> 00:10:39.040
-would be nice was
-
-00:10:39.040 --> 00:10:42.079
-modular so if I defined a
-
-00:10:42.079 --> 00:10:43.680
-one kind of block and you defined
-
-00:10:43.680 --> 00:10:45.519
-another we could compose them
-
-00:10:45.519 --> 00:10:47.600
-right and then get a you know a nice
-
-00:10:47.600 --> 00:10:49.360
-bigger block like lego
-
-00:10:49.360 --> 00:10:52.320
-that would be nice building box okay and
-
-00:10:52.320 --> 00:10:54.160
-uh this is uh what we
-
-00:10:54.160 --> 00:10:56.240
-have come up with called death block and
-
-00:10:56.240 --> 00:10:57.600
-it also has a
-
-00:10:57.600 --> 00:11:00.240
-long documentation string containing
-
-00:11:00.240 --> 00:11:01.760
-examples and things
-
-00:11:01.760 --> 00:11:04.800
-so that way you can try to be useful
-
-00:11:04.800 --> 00:11:08.320
-okay um so let's let's look at a a
-
-00:11:08.320 --> 00:11:10.880
-solution to these friends uh trilemma
-
-00:11:10.880 --> 00:11:12.800
-all right so here's here's a way to
-
-00:11:12.800 --> 00:11:14.320
-define a block
-
-00:11:14.320 --> 00:11:17.040
-um it looks it's it doesn't look that
-
-00:11:17.040 --> 00:11:19.200
-difficult but this is how they can
-
-00:11:19.200 --> 00:11:22.320
-define a block for um
-
-00:11:22.320 --> 00:11:25.920
-for uh their top-level feedback right
-
-00:11:25.920 --> 00:11:27.680
-so let's let's look at the three main
-
-00:11:27.680 --> 00:11:28.959
-parts together
-
-00:11:28.959 --> 00:11:31.920
-it's not that uh difficult I hope just
-
-00:11:31.920 --> 00:11:33.040
-six lines
-
-00:11:33.040 --> 00:11:34.720
-and that's including a documentation
-
-00:11:34.720 --> 00:11:36.160
-string and you know
-
-00:11:36.160 --> 00:11:39.440
-uh new lines and things okay so in line
-
-00:11:39.440 --> 00:11:41.279
-one we just define the block just like
-
-00:11:41.279 --> 00:11:42.000
-you define
-
-00:11:42.000 --> 00:11:44.880
-a function we define a block the flag
-
-00:11:44.880 --> 00:11:46.399
-the block name is going to be called
-
-00:11:46.399 --> 00:11:49.680
-feedback it has an author who
-
-00:11:49.680 --> 00:11:53.360
-right the author has no default
-
-00:11:53.360 --> 00:11:56.160
-value it has a color and the color has a
-
-00:11:56.160 --> 00:11:57.760
-default value of red
-
-00:11:57.760 --> 00:12:00.560
-okay so just just as when you define
-
-00:12:00.560 --> 00:12:01.680
-functions they
-
-00:12:01.680 --> 00:12:04.880
-they uh you start by uh define
-
-00:12:04.880 --> 00:12:08.639
-or def block than the name some
-
-00:12:08.639 --> 00:12:10.720
-mandatory argument and some optional
-
-00:12:10.720 --> 00:12:13.440
-arguments okay
-
-00:12:13.440 --> 00:12:15.760
-then the next stage is well and
-
-00:12:15.760 --> 00:12:18.480
-definition a documentation you know
-
-00:12:18.480 --> 00:12:20.880
-uh the people who use this which are
-
-00:12:20.880 --> 00:12:22.880
-future you or future me you know
-
-00:12:22.880 --> 00:12:25.519
-uh might want to know what this is all
-
-00:12:25.519 --> 00:12:27.839
-right so let's get to document this
-
-00:12:27.839 --> 00:12:30.560
-uh and uh for for corwin who might want
-
-00:12:30.560 --> 00:12:32.079
-to use uh tooltips
-
-00:12:32.079 --> 00:12:34.560
-uh when corwin writes feedback whatever
-
-00:12:34.560 --> 00:12:35.120
-and
-
-00:12:35.120 --> 00:12:37.120
-Emacs they'll see a nice little tooltip
-
-00:12:37.120 --> 00:12:38.639
-and the tooltip will have
-
-00:12:38.639 --> 00:12:41.279
-this uh documentation string right so
-
-00:12:41.279 --> 00:12:43.279
-that'll be nice
-
-00:12:43.279 --> 00:12:45.200
-okay and then here's the third part the
-
-00:12:45.200 --> 00:12:46.480
-last three lines are
-
-00:12:46.480 --> 00:12:49.440
-not not so difficult if the back end is
-
-00:12:49.440 --> 00:12:49.680
-in
-
-00:12:49.680 --> 00:12:52.800
-is html the backend is html
-
-00:12:52.800 --> 00:12:55.360
-please use this template string
-
-00:12:55.360 --> 00:12:57.440
-otherwise use the other string
-
-00:12:57.440 --> 00:13:00.639
-okay and for each of these uh string
-
-00:13:00.639 --> 00:13:01.279
-markers
-
-00:13:01.279 --> 00:13:03.600
-please put in the color who wrote it and
-
-00:13:03.600 --> 00:13:04.959
-then the contents
-
-00:13:04.959 --> 00:13:07.279
-of the special block or the link type
-
-00:13:07.279 --> 00:13:08.160
-okay
-
-00:13:08.160 --> 00:13:10.639
-um so that's pretty neat not not so
-
-00:13:10.639 --> 00:13:11.600
-difficult
-
-00:13:11.600 --> 00:13:14.639
-so I thought that was kind of cool and
-
-00:13:14.639 --> 00:13:15.519
-then notice it's
-
-00:13:15.519 --> 00:13:18.480
-anaphoric it's it's a this this def
-
-00:13:18.480 --> 00:13:19.519
-block
-
-00:13:19.519 --> 00:13:21.760
-gives you two new names it gives you a
-
-00:13:21.760 --> 00:13:22.560
-name called
-
-00:13:22.560 --> 00:13:25.120
-uh contents and it gives you a name
-
-00:13:25.120 --> 00:13:26.480
-called back end
-
-00:13:26.480 --> 00:13:29.040
-right and so even if you're writing a
-
-00:13:29.040 --> 00:13:31.040
-def block and you intend it to be used
-
-00:13:31.040 --> 00:13:32.560
-only for links
-
-00:13:32.560 --> 00:13:35.440
-uh like the uh these colors for example
-
-00:13:35.440 --> 00:13:37.600
-uh these colors were defined using dev
-
-00:13:37.600 --> 00:13:38.399
-block
-
-00:13:38.399 --> 00:13:41.279
-uh and I used them as links right here
-
-00:13:41.279 --> 00:13:43.360
-and you don't need to worry
-
-00:13:43.360 --> 00:13:44.880
-where does the text come from in the
-
-00:13:44.880 --> 00:13:48.160
-link you know if I say red colon bob uh
-
-00:13:48.160 --> 00:13:48.959
-is it bob
-
-00:13:48.959 --> 00:13:50.720
-or if I put a description is it the
-
-00:13:50.720 --> 00:13:52.000
-description so
-
-00:13:52.000 --> 00:13:54.000
-it's whatever is available will will
-
-00:13:54.000 --> 00:13:56.720
-become uh the value of contents
-
-00:13:56.720 --> 00:13:59.199
-and if you're really you know interested
-
-00:13:59.199 --> 00:14:00.320
-and you want to do some
-
-00:14:00.320 --> 00:14:03.839
-intricate stuff uh def block also gives
-
-00:14:03.839 --> 00:14:04.959
-you something called
-
-00:14:04.959 --> 00:14:08.160
-raw dash contents if you really want to
-
-00:14:08.160 --> 00:14:09.360
-touch the raw
-
-00:14:09.360 --> 00:14:11.920
-uh contents with all of the org markups
-
-00:14:11.920 --> 00:14:12.639
-still there
-
-00:14:12.639 --> 00:14:16.000
-okay so let's uh let's see
-
-00:14:16.000 --> 00:14:18.320
-how uh everyone can uh communicate
-
-00:14:18.320 --> 00:14:19.440
-amongst themselves
-
-00:14:19.440 --> 00:14:22.480
-using this new interface okay so
-
-00:14:22.480 --> 00:14:26.000
-uh uh sasha speculates and she how does
-
-00:14:26.000 --> 00:14:28.399
-she speculate for her organ html
-
-00:14:28.399 --> 00:14:31.440
-she might just write hey look at that no
-
-00:14:31.440 --> 00:14:34.800
-no no html nice and and
-
-00:14:34.800 --> 00:14:37.519
-amin wants to have some green and so he
-
-00:14:37.519 --> 00:14:39.600
-just says hey here's some color green
-
-00:14:39.600 --> 00:14:42.240
-and and uh there you go it looks almost
-
-00:14:42.240 --> 00:14:42.959
-the same
-
-00:14:42.959 --> 00:14:46.560
-right uh notice that the main argument
-
-00:14:46.560 --> 00:14:49.680
-is right here def block took an author
-
-00:14:49.680 --> 00:14:52.480
-and here's the author again and now the
-
-00:14:52.480 --> 00:14:53.920
-optional argument
-
-00:14:53.920 --> 00:14:57.360
-uses the org babel source interface you
-
-00:14:57.360 --> 00:14:58.000
-just say
-
-00:14:58.000 --> 00:15:00.639
-colon and then a key and then the
-
-00:15:00.639 --> 00:15:01.440
-argument
-
-00:15:01.440 --> 00:15:05.040
-quite quite nice and and corwin doesn't
-
-00:15:05.040 --> 00:15:05.519
-want to
-
-00:15:05.519 --> 00:15:07.920
-use blocks it's a bit of an overkill and
-
-00:15:07.920 --> 00:15:09.760
-can just write a
-
-00:15:09.760 --> 00:15:12.959
-a little um right
-
-00:15:12.959 --> 00:15:16.000
-so the main argument is now the uh uh
-
-00:15:16.000 --> 00:15:17.440
-the label of the link
-
-00:15:17.440 --> 00:15:19.360
-all right and then the description of
-
-00:15:19.360 --> 00:15:21.600
-the link is the contents
-
-00:15:21.600 --> 00:15:24.959
-of uh of the feedback so that was quite
-
-00:15:24.959 --> 00:15:25.680
-nice
-
-00:15:25.680 --> 00:15:28.079
-so it looks like uh everyone uses the
-
-00:15:28.079 --> 00:15:29.360
-same interface on the left
-
-00:15:29.360 --> 00:15:32.800
-and can have varying uh outputs
-
-00:15:32.800 --> 00:15:34.480
-and it looks I think it looks quite nice
-
-00:15:34.480 --> 00:15:36.639
-and I hope you do too
-
-00:15:36.639 --> 00:15:40.000
-um and there's a few more maybe
-
-00:15:40.000 --> 00:15:42.160
-as you saw in some previous ones we had
-
-00:15:42.160 --> 00:15:43.920
-text side beside side
-
-00:15:43.920 --> 00:15:46.800
-right now um or we folded some regions
-
-00:15:46.800 --> 00:15:47.440
-away
-
-00:15:47.440 --> 00:15:49.360
-that was quite nice we put some things
-
-00:15:49.360 --> 00:15:50.959
-in pretty boxes
-
-00:15:50.959 --> 00:15:54.000
-um uh we had some spoilers at the very
-
-00:15:54.000 --> 00:15:57.120
-beginning that we we uh hit some text uh
-
-00:15:57.120 --> 00:15:58.160
-we demoed uh
-
-00:15:58.160 --> 00:15:59.600
-some texts right you know here's some
-
-00:15:59.600 --> 00:16:01.680
-org and here's what it looks like
-
-00:16:01.680 --> 00:16:04.480
-um and and most importantly uh they they
-
-00:16:04.480 --> 00:16:05.199
-compose
-
-00:16:05.199 --> 00:16:08.320
-right there's uh uh there's a
-
-00:16:08.320 --> 00:16:12.639
-a macro called uh uh thread block
-
-00:16:12.639 --> 00:16:14.720
-uh thread block a thread block call and
-
-00:16:14.720 --> 00:16:16.160
-it lets you thread the
-
-00:16:16.160 --> 00:16:18.000
-the contents through a number of blocks
-
-00:16:18.000 --> 00:16:20.639
-treating them as if they were functions
-
-00:16:20.639 --> 00:16:22.480
-and so really you can think of a block
-
-00:16:22.480 --> 00:16:23.680
-as a as a
-
-00:16:23.680 --> 00:16:26.560
-as a string valued function so that's
-
-00:16:26.560 --> 00:16:27.360
-pretty neat
-
-00:16:27.360 --> 00:16:30.959
-I I think and uh thank you for listening
-
-00:16:30.959 --> 00:16:31.759
-and uh
-
-00:16:31.759 --> 00:16:34.320
-I I hope you've uh enjoyed this little
-
-00:16:34.320 --> 00:16:34.880
-uh
-
-00:16:34.880 --> 00:16:37.600
-happy fun time with uh with the Emacs
-
-00:16:37.600 --> 00:16:38.160
-and friends
-
-00:16:38.160 --> 00:16:40.720
-and uh I'll I'm I'll happy happily
-
-00:16:40.720 --> 00:16:41.759
-answer questions
-
-00:16:41.759 --> 00:16:43.730
-uh right now um
-
-00:16:43.730 --> 00:16:45.360
-[Music]
-
-00:16:45.360 --> 00:16:48.160
-so uh someone says why did you put
-
-00:16:48.160 --> 00:16:50.480
-optional arguments in a separate list
-
-00:16:50.480 --> 00:16:53.600
-rather than using cl style argument
-
-00:16:53.600 --> 00:16:54.560
-lists
-
-00:16:54.560 --> 00:16:58.399
-um so that's a very good question
-
-00:16:58.399 --> 00:17:01.680
-and I will answer that by
-
-00:17:01.680 --> 00:17:04.400
-showing you a more involved definition
-
-00:17:04.400 --> 00:17:04.880
-of
-
-00:17:04.880 --> 00:17:08.959
-feedback so let's look at a
-
-00:17:08.959 --> 00:17:13.039
-a more involved one
-
-00:17:13.039 --> 00:17:16.079
-right right here so for example
-
-00:17:16.079 --> 00:17:19.280
-this one is called rural mark all right
-
-00:17:19.280 --> 00:17:21.760
-and uh please let me know if my text is
-
-00:17:21.760 --> 00:17:23.439
-not sufficiently big
-
-00:17:23.439 --> 00:17:26.799
-so here is here is why uh we have
-
-00:17:26.799 --> 00:17:29.520
-two arguments that takes two arguments
-
-00:17:29.520 --> 00:17:30.720
-uh instead of one
-
-00:17:30.720 --> 00:17:33.360
-for for its argument list right so you
-
-00:17:33.360 --> 00:17:34.799
-you have def block
-
-00:17:34.799 --> 00:17:37.679
-then you have the name right then you
-
-00:17:37.679 --> 00:17:38.400
-have
-
-00:17:38.400 --> 00:17:40.960
-the first uh argument list and the
-
-00:17:40.960 --> 00:17:42.880
-second argument list
-
-00:17:42.880 --> 00:17:46.080
-the first argument list uh takes the
-
-00:17:46.080 --> 00:17:49.280
-takes the text right after the begin
-
-00:17:49.280 --> 00:17:51.760
-right the text right after the begin is
-
-00:17:51.760 --> 00:17:52.320
-the main
-
-00:17:52.320 --> 00:17:55.760
-argument okay and then the remaining key
-
-00:17:55.760 --> 00:17:57.039
-value pairs
-
-00:17:57.039 --> 00:18:00.320
-are in the second argument list okay
-
-00:18:00.320 --> 00:18:03.280
-now the reason we have two is because uh
-
-00:18:03.280 --> 00:18:04.640
-in order to
-
-00:18:04.640 --> 00:18:06.799
-streamline the interface to account for
-
-00:18:06.799 --> 00:18:08.880
-both uh special blocks
-
-00:18:08.880 --> 00:18:12.320
-and or link types uh what we do is we
-
-00:18:12.320 --> 00:18:13.360
-say hey
-
-00:18:13.360 --> 00:18:16.160
-uh in the first argument list uh you can
-
-00:18:16.160 --> 00:18:18.000
-give a name to the first argument
-
-00:18:18.000 --> 00:18:21.039
-give it a default value and anything
-
-00:18:21.039 --> 00:18:24.240
-else you provide will become uh
-
-00:18:24.240 --> 00:18:27.760
-uh part of the I'll co link
-
-00:18:27.760 --> 00:18:30.000
-information so for example this link we
-
-00:18:30.000 --> 00:18:32.000
-decided to make its face
-
-00:18:32.000 --> 00:18:34.799
-angry red um you might want to give
-
-00:18:34.799 --> 00:18:35.840
-other features to
-
-00:18:35.840 --> 00:18:37.919
-links so we're trying to streamline the
-
-00:18:37.919 --> 00:18:39.679
-interface for both
-
-00:18:39.679 --> 00:18:42.320
-special blocks and org link types and we
-
-00:18:42.320 --> 00:18:42.880
-thought
-
-00:18:42.880 --> 00:18:46.240
-this way was quite nice um so
-
-00:18:46.240 --> 00:18:49.840
-that was the main reason uh someone asks
-
-00:18:49.840 --> 00:18:52.480
-uh so if if you uh if that's uh if you
-
-00:18:52.480 --> 00:18:55.039
-need if you have follow-up please ask
-
-00:18:55.039 --> 00:18:57.600
-someone asks do you intend to try to
-
-00:18:57.600 --> 00:19:00.559
-upstream this amazing work into org
-
-00:19:00.559 --> 00:19:03.600
-well I'm glad you like it I I don't know
-
-00:19:03.600 --> 00:19:04.559
-how to upstream
-
-00:19:04.559 --> 00:19:06.880
-but but I I will look into it and any
-
-00:19:06.880 --> 00:19:08.799
-advice or guidance would be
-
-00:19:08.799 --> 00:19:11.840
-much appreciated um you know
-
-00:19:11.840 --> 00:19:14.640
-lisp is awesome and just as defunded as
-
-00:19:14.640 --> 00:19:17.120
-a macro deathblock is a macro and then
-
-00:19:17.120 --> 00:19:20.240
-source blocks are awesome and then now
-
-00:19:20.240 --> 00:19:21.919
-maybe we can have arguments and special
-
-00:19:21.919 --> 00:19:24.080
-blocks and motivate and encourage more
-
-00:19:24.080 --> 00:19:25.280
-people to uh
-
-00:19:25.280 --> 00:19:28.799
-to uh learn lisp right
-
-00:19:28.799 --> 00:19:32.559
-so another person asks
-
-00:19:32.559 --> 00:19:35.280
-um what is used to produce colorful
-
-00:19:35.280 --> 00:19:38.559
-boxes around the cursor
-
-00:19:38.559 --> 00:19:40.400
-I I'm not quite sure if you're asking
-
-00:19:40.400 --> 00:19:41.840
-are you talking about my cursor right
-
-00:19:41.840 --> 00:19:42.559
-here
-
-00:19:42.559 --> 00:19:48.400
-or are you talking about in the slide um
-
-00:19:48.400 --> 00:19:50.559
-so this this this cursor is some
-
-00:19:50.559 --> 00:19:52.400
-application called
-
-00:19:52.400 --> 00:19:55.440
-a stream brush that I had to purchase uh
-
-00:19:55.440 --> 00:19:57.679
-unfortunately I could not find a a
-
-00:19:57.679 --> 00:19:59.039
-suitable free one
-
-00:19:59.039 --> 00:20:02.159
-um and the blocks I can demonstrate some
-
-00:20:02.159 --> 00:20:03.840
-Emacs list but I can open up my Emacs if
-
-00:20:03.840 --> 00:20:05.679
-people like and we can try some things
-
-00:20:05.679 --> 00:20:06.320
-out
-
-00:20:06.320 --> 00:20:09.440
-happy to do that uh
-
-00:20:09.440 --> 00:20:12.480
-you're welcome uh someone asks
-
-00:20:12.480 --> 00:20:14.880
-a side question about org reveal how do
-
-00:20:14.880 --> 00:20:15.520
-you get
-
-00:20:15.520 --> 00:20:17.440
-bespoke or multiple column layouts
-
-00:20:17.440 --> 00:20:19.120
-without using html
-
-00:20:19.120 --> 00:20:22.559
-ah excellent question that's what we do
-
-00:20:22.559 --> 00:20:24.640
-that's that's what this uh project is
-
-00:20:24.640 --> 00:20:26.000
-about so it's not
-
-00:20:26.000 --> 00:20:28.960
-org reveal it's it's our fancy parallel
-
-00:20:28.960 --> 00:20:29.440
-uh
-
-00:20:29.440 --> 00:20:32.240
-uh block so we have this thing you say
-
-00:20:32.240 --> 00:20:33.440
-begin parallel
-
-00:20:33.440 --> 00:20:35.679
-you say how many columns you would like
-
-00:20:35.679 --> 00:20:37.120
-uh do you want a bar
-
-00:20:37.120 --> 00:20:39.679
-or not and then you write some text and
-
-00:20:39.679 --> 00:20:40.960
-then you uh
-
-00:20:40.960 --> 00:20:42.480
-you get some text and according with the
-
-00:20:42.480 --> 00:20:44.400
-bar or not right so that's
-
-00:20:44.400 --> 00:20:47.520
-that's how we achieve that in our slides
-
-00:20:47.520 --> 00:20:50.080
-so I'm not uh I'm not quite sure where
-
-00:20:50.080 --> 00:20:52.880
-this was
-
-00:20:52.880 --> 00:20:59.520
-somewhere here I think
-
-00:20:59.520 --> 00:21:06.240
-let me try to find this for you
-
-00:21:06.240 --> 00:21:08.320
-I can't seem to find where the parallel
-
-00:21:08.320 --> 00:21:09.440
-blocks were
-
-00:21:09.440 --> 00:21:12.159
-apologies let's move on to the next
-
-00:21:12.159 --> 00:21:15.039
-question I suppose
-
-00:21:15.039 --> 00:21:17.760
-uh I'm pretty sure they're here ah there
-
-00:21:17.760 --> 00:21:18.400
-they are
-
-00:21:18.400 --> 00:21:21.360
-yes so these these uh were just
-
-00:21:21.360 --> 00:21:22.640
-instances of using
-
-00:21:22.640 --> 00:21:25.440
-uh the parallel block and it makes
-
-00:21:25.440 --> 00:21:26.480
-things parallel
-
-00:21:26.480 --> 00:21:29.600
-so that's quite nice um another person
-
-00:21:29.600 --> 00:21:33.360
-asks uh yes
-
-00:21:33.360 --> 00:21:36.720
-excellent um how does this relate to
-
-00:21:36.720 --> 00:21:37.840
-banda pandoc
-
-00:21:37.840 --> 00:21:39.360
-which is used for converting between
-
-00:21:39.360 --> 00:21:40.960
-markup formats
-
-00:21:40.960 --> 00:21:43.919
-so all we're doing is we're we're saying
-
-00:21:43.919 --> 00:21:44.400
-hey
-
-00:21:44.400 --> 00:21:46.799
-please write org because org is just
-
-00:21:46.799 --> 00:21:47.679
-fantastic
-
-00:21:47.679 --> 00:21:50.400
-and we love it and it's the dream and if
-
-00:21:50.400 --> 00:21:51.760
-you would like to view things
-
-00:21:51.760 --> 00:21:55.039
-in html or in org reveal or
-
-00:21:55.039 --> 00:21:58.559
-in pdf that's up to the user so
-
-00:21:58.559 --> 00:22:02.320
-here is a um oh
-
-00:22:02.320 --> 00:22:05.039
-made it too small now so here is a an
-
-00:22:05.039 --> 00:22:06.080
-example
-
-00:22:06.080 --> 00:22:08.880
-so here's an uh how here's how parallel
-
-00:22:08.880 --> 00:22:10.240
-is implemented
-
-00:22:10.240 --> 00:22:13.120
-uh just as a quick example uh not too
-
-00:22:13.120 --> 00:22:14.320
-long
-
-00:22:14.320 --> 00:22:16.880
-uh about half of the implementation is
-
-00:22:16.880 --> 00:22:18.400
-documentation so
-
-00:22:18.400 --> 00:22:20.720
-uh hopefully that speaks for for how
-
-00:22:20.720 --> 00:22:22.720
-useful this feature is
-
-00:22:22.720 --> 00:22:25.280
-uh so we decide if there's a rule or not
-
-00:22:25.280 --> 00:22:28.080
-um we look for the column break
-
-00:22:28.080 --> 00:22:29.760
-and really here we're looking at the
-
-00:22:29.760 --> 00:22:31.840
-back end if the back end is latex
-
-00:22:31.840 --> 00:22:34.960
-uh please use this uh incantation with
-
-00:22:34.960 --> 00:22:37.679
-multi columns mini pages what have you
-
-00:22:37.679 --> 00:22:38.559
-and if the
-
-00:22:38.559 --> 00:22:41.039
-back end is something else uh please uh
-
-00:22:41.039 --> 00:22:41.600
-do this
-
-00:22:41.600 --> 00:22:44.960
-uh div and style and uh other uh
-
-00:22:44.960 --> 00:22:46.640
-gibberish that we don't really wanna
-
-00:22:46.640 --> 00:22:48.080
-look at uh so
-
-00:22:48.080 --> 00:22:51.760
-uh when you pandoc works from org
-
-00:22:51.760 --> 00:22:55.280
-so it might not work directly since our
-
-00:22:55.280 --> 00:22:58.080
-interface the way we set it up is when
-
-00:22:58.080 --> 00:22:59.679
-you try to export
-
-00:22:59.679 --> 00:23:01.919
-uh we hook in and we do a bunch of
-
-00:23:01.919 --> 00:23:03.039
-pre-processing
-
-00:23:03.039 --> 00:23:05.919
-so this this uh def block is a is a
-
-00:23:05.919 --> 00:23:07.440
-string valued function
-
-00:23:07.440 --> 00:23:10.880
-and so whenever we see these uh begin
-
-00:23:10.880 --> 00:23:13.919
-parallel uh when you do an export
-
-00:23:13.919 --> 00:23:16.480
-I tell Emacs hold up look for those
-
-00:23:16.480 --> 00:23:16.960
-begin
-
-00:23:16.960 --> 00:23:19.360
-parallels please oh you found them grab
-
-00:23:19.360 --> 00:23:20.320
-that text
-
-00:23:20.320 --> 00:23:22.400
-you grabbed it great now please apply
-
-00:23:22.400 --> 00:23:24.080
-this person's uh function
-
-00:23:24.080 --> 00:23:27.120
-onto that text and splice in the result
-
-00:23:27.120 --> 00:23:29.760
-okay so so when you export uh we're
-
-00:23:29.760 --> 00:23:30.400
-performing
-
-00:23:30.400 --> 00:23:33.600
-arbitrary computations on your uh uh on
-
-00:23:33.600 --> 00:23:35.120
-your text
-
-00:23:35.120 --> 00:23:38.799
-so uh um some people might not find that
-
-00:23:38.799 --> 00:23:40.159
-comforting to have
-
-00:23:40.159 --> 00:23:43.039
-arbitrary uh computations happening so
-
-00:23:43.039 --> 00:23:45.039
-in this article there's a few where
-
-00:23:45.039 --> 00:23:47.520
-uh we change your text upon export we
-
-00:23:47.520 --> 00:23:48.320
-translate it
-
-00:23:48.320 --> 00:23:51.760
-we do other things to it um
-
-00:23:51.760 --> 00:23:55.360
-so someone says uh if you export to
-
-00:23:55.360 --> 00:23:57.360
-latex to pdf does that work well with
-
-00:23:57.360 --> 00:23:58.640
-beamer as well
-
-00:23:58.640 --> 00:24:00.320
-to create slides with columns for
-
-00:24:00.320 --> 00:24:02.080
-example for uh
-
-00:24:02.080 --> 00:24:05.200
-um so uh actually uh
-
-00:24:05.200 --> 00:24:08.000
-so uh I I made a bunch of these changes
-
-00:24:08.000 --> 00:24:09.200
-earlier this morning
-
-00:24:09.200 --> 00:24:12.320
-and it just says latex right here um
-
-00:24:12.320 --> 00:24:14.480
-so if you want to go to beamer I think
-
-00:24:14.480 --> 00:24:15.360
-the back end for me
-
-00:24:15.360 --> 00:24:18.240
-beamer is called well beamer so instead
-
-00:24:18.240 --> 00:24:18.960
-of a
-
-00:24:18.960 --> 00:24:21.200
-a p case what we would do is we would
-
-00:24:21.200 --> 00:24:22.000
-say oh
-
-00:24:22.000 --> 00:24:25.360
-if it's a latex or it's a beamer
-
-00:24:25.360 --> 00:24:29.279
-then uh use this uh otherwise
-
-00:24:29.279 --> 00:24:31.120
-it's not a latex it will simply default
-
-00:24:31.120 --> 00:24:33.039
-to this one which could be
-
-00:24:33.039 --> 00:24:36.400
-dangerous for your needs um I think it's
-
-00:24:36.400 --> 00:24:39.679
-a bad practice to put a underscore but I
-
-00:24:39.679 --> 00:24:41.279
-did it really quickly because I just
-
-00:24:41.279 --> 00:24:43.679
-wanted to show you that it works fine in
-
-00:24:43.679 --> 00:24:46.559
-org reveal contributions are more than
-
-00:24:46.559 --> 00:24:47.440
-welcome
-
-00:24:47.440 --> 00:24:51.039
-I I uh happily uh would love any
-
-00:24:51.039 --> 00:24:52.240
-assistance
-
-00:24:52.240 --> 00:24:56.080
-um and and I have a uh we have a
-
-00:24:56.080 --> 00:24:58.640
-list a reference cheat sheet here to to
-
-00:24:58.640 --> 00:25:00.159
-learn a little bit about lisp if you're
-
-00:25:00.159 --> 00:25:02.000
-not comfortable or to
-
-00:25:02.000 --> 00:25:04.640
-ask some questions lots of helpful
-
-00:25:04.640 --> 00:25:06.400
-people
-
-00:25:06.400 --> 00:25:09.440
-so there's another question that says uh
-
-00:25:09.440 --> 00:25:11.679
-does typing in a block mess up with a
-
-00:25:11.679 --> 00:25:13.120
-syntax highlighting
-
-00:25:13.120 --> 00:25:15.679
-usually you use a single color inside an
-
-00:25:15.679 --> 00:25:17.279
-example block for example
-
-00:25:17.279 --> 00:25:21.279
-ah you found my crutch you found
-
-00:25:21.279 --> 00:25:25.279
-my crutch um so I so there's
-
-00:25:25.279 --> 00:25:27.440
-emax's is all encompassing and I'm not
-
-00:25:27.440 --> 00:25:29.760
-quite sure how fonts work or are
-
-00:25:29.760 --> 00:25:32.559
-you know I I learned enough to get by I
-
-00:25:32.559 --> 00:25:33.840
-learned enough to get by
-
-00:25:33.840 --> 00:25:37.440
-so let me um but here's
-
-00:25:37.440 --> 00:25:39.760
-here's how links work they're they're a
-
-00:25:39.760 --> 00:25:40.799
-bit complicated
-
-00:25:40.799 --> 00:25:42.960
-this this is a bit scary I don't
-
-00:25:42.960 --> 00:25:43.919
-recommend anyone
-
-00:25:43.919 --> 00:25:47.039
-uh read it um
-
-00:25:47.039 --> 00:25:49.840
-but uh actually let me open up an email
-
-00:25:49.840 --> 00:25:50.559
-and you can
-
-00:25:50.559 --> 00:25:53.600
-you can see what I see uh so here's an
-
-00:25:53.600 --> 00:25:54.799
-Emacs
-
-00:25:54.799 --> 00:25:56.799
-all right let's make that a bit bigger
-
-00:25:56.799 --> 00:25:58.400
-uh let's change this
-
-00:25:58.400 --> 00:26:01.200
-slightly nope that's worse there you go
-
-00:26:01.200 --> 00:26:01.919
-so
-
-00:26:01.919 --> 00:26:05.760
-here's here's some words um so here's
-
-00:26:05.760 --> 00:26:09.360
-red hello um
-
-00:26:09.360 --> 00:26:12.000
-but you're worried about uh preserving
-
-00:26:12.000 --> 00:26:12.400
-uh
-
-00:26:12.400 --> 00:26:15.679
-uh uh um quantification
-
-00:26:15.679 --> 00:26:18.480
-so let's make an emax list block all
-
-00:26:18.480 --> 00:26:18.880
-right
-
-00:26:18.880 --> 00:26:22.840
-and let's say plus one two ah
-
-00:26:22.840 --> 00:26:28.000
-where's the fun hello
-
-00:26:28.000 --> 00:26:32.080
-um bye okay where's the coloring
-
-00:26:32.080 --> 00:26:34.880
-if we if we zoom in on this on this
-
-00:26:34.880 --> 00:26:36.000
-begin source block
-
-00:26:36.000 --> 00:26:39.200
-if we zoom in you can see down here
-
-00:26:39.200 --> 00:26:42.159
-uh we have our our coloring all right
-
-00:26:42.159 --> 00:26:43.279
-when we zoom in
-
-00:26:43.279 --> 00:26:46.960
-if we if we zoom out ah no coloring
-
-00:26:46.960 --> 00:26:50.080
-zoom in coloring it's about ah no
-
-00:26:50.080 --> 00:26:50.880
-coloring
-
-00:26:50.880 --> 00:26:53.840
-let's take off these bad boys and oh
-
-00:26:53.840 --> 00:26:55.679
-look my coloring's back
-
-00:26:55.679 --> 00:26:59.360
-so um in a previous
-
-00:26:59.360 --> 00:27:02.320
-uh iteration of the system I was able to
-
-00:27:02.320 --> 00:27:03.760
-maintain coloring
-
-00:27:03.760 --> 00:27:06.400
-uh in this new iteration I am not I
-
-00:27:06.400 --> 00:27:08.559
-don't know how to do it I haven't uh
-
-00:27:08.559 --> 00:27:11.039
-had the time to to implement it I spent
-
-00:27:11.039 --> 00:27:13.279
-a lot of time writing this uh
-
-00:27:13.279 --> 00:27:17.279
-48 page uh documentation uh with uh
-
-00:27:17.279 --> 00:27:19.679
-with some fun examples to to to try to
-
-00:27:19.679 --> 00:27:20.320
-help
-
-00:27:20.320 --> 00:27:21.760
-people learn so but but I would
-
-00:27:21.760 --> 00:27:23.760
-appreciate any help or guidance on
-
-00:27:23.760 --> 00:27:26.240
-how to uh maintain the quantification I
-
-00:27:26.240 --> 00:27:28.000
-I really would like to keep those colors
-
-00:27:28.000 --> 00:27:29.200
-in
-
-00:27:29.200 --> 00:27:31.840
-um musa we have time for maybe one more
-
-00:27:31.840 --> 00:27:32.640
-question
-
-00:27:32.640 --> 00:27:34.960
-um one or two more questions and then we
-
-00:27:34.960 --> 00:27:37.039
-have to move on to the next talk
-
-00:27:37.039 --> 00:27:39.120
-um but yeah you're more than welcome to
-
-00:27:39.120 --> 00:27:40.799
-take continue taking the questions via
-
-00:27:40.799 --> 00:27:42.559
-irc or the pad
-
-00:27:42.559 --> 00:27:45.760
-okay thank you thank you
-
-00:27:45.760 --> 00:27:48.480
-let's uh the final question we'll take
-
-00:27:48.480 --> 00:27:48.880
-is
-
-00:27:48.880 --> 00:27:52.320
-um should packages implement
-
-00:27:52.320 --> 00:27:54.399
-interface to one specific format or
-
-00:27:54.399 --> 00:27:55.840
-attempt to be conclusive to all the
-
-00:27:55.840 --> 00:27:57.279
-potential output targets
-
-00:27:57.279 --> 00:27:58.880
-I think you should just make them as you
-
-00:27:58.880 --> 00:28:01.120
-go and you know add them as you need
-
-00:28:01.120 --> 00:28:02.559
-them we'll make uh
-
-00:28:02.559 --> 00:28:05.600
-help requests or things and uh
-
-00:28:05.600 --> 00:28:07.840
-we can we can share recipes in this uh
-
-00:28:07.840 --> 00:28:09.279
-document and then
-
-00:28:09.279 --> 00:28:12.799
-try to add other uh techniques and then
-
-00:28:12.799 --> 00:28:16.000
-and we can uh use these blocks as a
-
-00:28:16.000 --> 00:28:19.200
-common uh interface for
-
-00:28:19.200 --> 00:28:22.240
-for exporting to pdf and other things
-
-00:28:22.240 --> 00:28:26.000
-and since someone asked here is a um
-
-00:28:26.000 --> 00:28:28.399
-here is uh what a pdf looks like this is
-
-00:28:28.399 --> 00:28:30.159
-the same pdf and
-
-00:28:30.159 --> 00:28:33.840
-uh rendered uh just I made no effort to
-
-00:28:33.840 --> 00:28:34.960
-make it look good
-
-00:28:34.960 --> 00:28:37.840
-but it surprisingly does look good so so
-
-00:28:37.840 --> 00:28:38.559
-uh that was
-
-00:28:38.559 --> 00:28:41.600
-uh that was nice um that was a
-
-00:28:41.600 --> 00:28:44.320
-terrible magenta but that is life uh
-
-00:28:44.320 --> 00:28:44.880
-anyhow
-
-00:28:44.880 --> 00:28:47.279
-I hope you all enjoyed this talk I hope
-
-00:28:47.279 --> 00:28:48.960
-you will find um
-
-00:28:48.960 --> 00:28:51.679
-death block uh useful to you it is
-
-00:28:51.679 --> 00:28:52.799
-available on melbourne
-
-00:28:52.799 --> 00:28:54.960
-uh in a rush to make it available for
-
-00:28:54.960 --> 00:28:57.679
-EmacsConf 2020 some melba
-
-00:28:57.679 --> 00:29:00.159
-guidelines may not have been in here too
-
-00:29:00.159 --> 00:29:00.960
-please do not
-
-00:29:00.960 --> 00:29:03.200
-hit me um and I hope everyone enjoys the
-
-00:29:03.200 --> 00:29:04.720
-rest of the EmacsConf
-
-00:29:04.720 --> 00:29:08.559
-2020 thank you