From: "Freddy Chik" <yffchik_ura@hotmail.com>
Cc: <emacs-devel@gnu.org>
Subject: Re: Interval tree
Date: Wed, 17 Jul 2002 18:39:47 -0400 [thread overview]
Message-ID: <OE289oilcjbOv38lDbt00003637@hotmail.com> (raw)
In-Reply-To: 200207171313.g6HDDHY02385@rum.cs.yale.edu
it sounds like text properties are things like fonts?
I jumped into places such as lisp.h, buffer.h, textprop.c, hoping to find a
definition for this thing, but all I got is a Lisp_Object plist (even for
functions that adds to the property list or removes from it), where is this
mysterious text property structure described?
Yu Fai Freddy Chik
4A Computer Science / Combinatorics and Optimization
University of Waterloo
Waterloo, ON
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----- Original Message -----
From: "Stefan Monnier" <monnier+gnu/emacs@rum.cs.yale.edu>
To: "Freddy Chik" <yffchik_ura@hotmail.com>
Cc: <emacs-devel@gnu.org>
Sent: Wednesday, July 17, 2002 9:13 AM
Subject: Re: Interval tree
> > I am trying to understand how are text organized in emacs,
> > I come across this data structure call interval tree, which
> > is built on top of a buffer, can anyone point me to any paper
> > which talks about what an interval tree is and how this interval
> > concepts is used in emacs? thanks
>
> Please don't use HTML for such email (and complain to the author of
> the software you use that it should not use HTML if the text doesn't
> use any attribute annotation).
>
> As for the actual question: I don't think there's any paper about it.
> It's just a balanced binary tree used to implement text-properties
> (which associate with each buffer location a set of properties).
> Since text-properties tend to stay the same over several consecutive
> chars, the mapping only records the place where those properties
> change: each node of the tree corresponds to an interval that starts
> at a particular position and spans some number of chars.
>
>
> Stefan
>
>
> _______________________________________________
> Emacs-devel mailing list
> Emacs-devel@gnu.org
> http://mail.gnu.org/mailman/listinfo/emacs-devel
>
next prev parent reply other threads:[~2002-07-17 22:39 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-17 5:51 Interval tree Freddy Chik
2002-07-17 13:13 ` Stefan Monnier
2002-07-17 22:39 ` Freddy Chik [this message]
2002-07-18 21:13 ` Richard Stallman
2002-07-19 2:45 ` Freddy Chik
2002-07-19 20:56 ` Richard Stallman
2002-08-01 4:54 ` Thien-Thi Nguyen
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