[racket] Text% efficiently iterating over items

Oh: what about turning the editor into a port and then using
regexp-matching on it? The position of the port will be a delta from
where you created the position of the editor. Eg:

#lang racket/gui

(define t (new text%))
(void (send t load-file (collection-file-path "private/rep.rkt" "drracket")))
(define p (open-input-text-editor t))
(regexp-match? #rx"lambda" p)
(port-next-location p)

Robby

On Mon, Dec 12, 2011 at 4:36 PM, Erich Rast <erich at snafu.de> wrote:
> Yes, sorry, I've meant string-snip%.
>
> Okay, I'll iterate over snips then, because I need to match
> whole character sets.
>
> Thanks!
>
> Best,
>
> Erich
>
>  On Mon, 12 Dec 2011 16:12:13 -0600
> Robby Findler <robby at eecs.northwestern.edu> wrote:
>
>> You might get away with just using the find-string method of text%,
>> but if not, then you do have to iterate snip by snip. The positions
>> inside string-snip%s are offsets from the position of the whole snip
>> for characters (is that what you're asking for when you say
>> text-snip%?).
>>
>> Robby
>>
>> On Mon, Dec 12, 2011 at 4:08 PM, Erich Rast <erich at snafu.de> wrote:
>> > Is there a fast way to iterate over items or words in a text%
>> > instance starting from some position. For example, I'd like to go
>> > forward or backward starting from a position until a character in a
>> > given srfi14 char-set is found.
>> >
>> > Using a string returned get-text doesn't seem to work in general
>> > because of the ambiguity between "." meaning dot or being an
>> > embedded image.
>> >
>> > Do I need to iterate over snips using find-snip and then use the
>> > same position in the snip if it is a text-snip%? Is the position
>> > within a text-snip% the same as the position used by find-snip? If
>> > not, how do I calculate the offset?
>> >
>> >
>> > Best,
>> >
>> > Erich
>> >
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