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Re: Scrolling text erases the search highlight

From: Gabriel TEIXEIRA
Subject: Re: Scrolling text erases the search highlight
Date: Fri, 23 Jul 2010 13:29:54 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20100423 Thunderbird/3.0.4

On 23/07/2010 12:53, Andreas Röhler wrote:
Am 23.07.2010 11:25, schrieb Deniz Dogan:
2010/7/23 Gabriel TEIXEIRA<address@hidden>:
On 13/07/2010 15:54, Gabriel TEIXEIRA wrote:

On 13/07/2010 15:38, Deniz Dogan wrote:

2010/7/13 Gabriel TEIXEIRA<address@hidden>:

On 13/07/2010 09:14, Deniz Dogan wrote:

2010/7/12 Qiang Guo<address@hidden>:

You may want to check variable 'isearch-allow-scroll'

This is a good suggestion. But you may also want to know about "M-s o".

M-s o runs the command occur, which is an interactive compiled Lisp
function in `replace.el'.

It is bound to M-s o.

(occur REGEXP&optional NLINES)

Show all lines in the current buffer containing a match for REGEXP.
This function can not handle matches that span more than one line.

Thanks for the answers and sorry for the multiple messages, the M-s o is

very useful, but the isearch-allow-scroll doesn't work very well with
me. It
will conserve the search if I do C-l or C-v, but won't if I use the
scroll wheel or if I use the arrow keys to move the cursor (which are
way I scroll the screen mostly). I want something that works similar to
Linux man search, the vim or the gedit, that conserves the highlight as
as the search is erased. Any other suggestions?

For what it's worth, scrolling using the mouse works fine using: GNU
Emacs (i386-mingw-nt6.1.7600) of 2010-07-12 on 3249CTO

Yes, I'm using version 23.1.1. I couldn't realize that this could be the version of emacs. I will install a newer version to check it out. Hopefully
won't break with my .emacs config file :)
Many many thanks for your help

Hello back

After I recompiled my emacs to the, the problems of scrolling were solved mostly, but now after some time of usage I noticed a weird behaviour:
Now that I can scroll freely, I noticed that it won't scroll beyond the
position were the cursor is located (meaning that if I have one result in the line 150 and my text has 1000 lines and my buffer is 80 lines tall, I
can't scroll to see above the line 70 nor after the line 230), so I am
limited to scrolling the buffer that is near a result of the searched text,
and if I try to move the cursor away in order to scroll more or just to
change some text around it will erase the search too (and I come back with
the original problem again). Any idea to how to solve that?

As far as I know, there is no way to get around that problem today. I
think the main issue is that in Emacs point is always in the visible
portion of the buffer.


IMHO there is a way,

making functions doing de-highlighting conditional

(unless (or (eq last-command-event 'next)
          (eq last-command-event 'prior))

for example

(defun isearch-dehighlight ()
  (unless (or (eq last-command-event 'next)
              (eq last-command-event 'prior))
  (when isearch-overlay
    (delete-overlay isearch-overlay))))

same with


and maybe some more.

Produces visible effect here.

Some more/other will arise nonetheless:
isearch highlighting is done in visible portion of buffer only.
Starting scroll with both changes as above will keep the highlights set so far, but not highlight further, now scrolled portion.




Well, I tried just the isearch-dehighlight, but it doesn't work at all. I will try to find by myself the solution using the tips you gave me (Not before I master emacs a little bit further, I'm just starting...).

Vielen Dank!
Gabriel Teixeira

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