Re: "local hlsearch"

On Tue, Apr 1, 2014 at 3:28 PM, Nikolay Pavlov <zyx.vim@gmail.com> wrote:
>
> On Apr 1, 2014 10:44 PM, "Ethan Hereth" <advocateddrummer@gmail.com> wrote:
>>
>> Ethan Alan
>>
>>
>> On Tue, Apr 1, 2014 at 1:54 PM, <meino.cramer@gmx.de> wrote:
>> > John Beckett <johnb.beckett@gmail.com> [14-04-01 17:28]:
>> >> meino wrote:
>> >> > I often use a search'n'replace on an area, which is limited by
>> >> > a previously selected visual block.
>> >> > Additional hlsearch is on by default.
>> >> > After the searech'n'replace has ended, the found places are
>> >> > marked all over the whole text.
>> >> > This is often irritating to me.
>> >> > Is there a way to limit the highlights set by hlsearch to
>> >> > those place of the visual block area?
>> >>
>> >> As the other reply said, map a key to turn highlights off. See:
>> >> http://vim.wikia.com/wiki/Highlight_all_search_pattern_matches
>> >>
>> >> However, while not really helpful for what you asked, it is
>> >> possible to limit highlights to the last visually selected
>> >> block. See:
>> >> http://vim.wikia.com/wiki/Search_and_replace_in_a_visual_selection
>> >>
>> >> For example, consider these two searches:
>> >> /[abc]
>> >> /\%V[abc]
>> >>
>> >> The first finds all a or b or c, everywhere.
>> >>
>> >> The second finds the same, but only in the last visual
>> >> selection (what would be highlighted if gv were used).
>> >>
>> >> John
>> >>
>> >>
>> >>
>> > Hi John,
>> >
>> > thanks for your reply!
>> > I want to 'search and replace' not only to search.
>>
>> If I understand correctly, using /\%V in addition to '<,'> allows you
>> to search-and-replace ONLY in the visually selected area. This could
>> be handy if you have block selected (ctrl-v) a bit of text and want to
>> search-and-replace ONLY in that visually selected text. I.e.
>> '<,'>s/foo/bar/g will replace foo with bar anywhere in the lines
>> containing the visual selection, whereas '<,'>s/\%Vfoo/bar/g will
>> replace foo with bar ONLY in the region of text visually selected.
>
> Not correct. It will replace foo with bar ONLY if *f* is in the region of
> visually selected text. Position of next letter (o) may be outside of the
> selection. \%V is zero-width match atom, not a regex modifier (there are
> some that control behavior of the whole pattern or the whole portion of the
> pattern that follows the modifier).

I stand corrected. Thanks Nikolay. I was basing my statements on a
quick perusal of the help docs and some testing on some dummy text. I
didn't come across that case. I knew I'd get into trouble when I made
the "if I understand correctly" statement!


>
>>
>> To address your original question, it appears as if, at least on my
>> machine with my configuration, that using the \%V variant of this
>> search-and-replace the text will also only be highlighted in that
>> visual selection, so if you've replace all occurrences of the matched
>> text nothing will be left highlighted and you won't have to :set
>> nohlsearch.
>>
>> > I always thought that '<,'> already say: Do that only inside
>> > the visual block.
>> > Why do I need to specify \%V additionally.
>> > Or do I get all this totally wrong ??????
>> >
>> > By the way: I treid to find the expression \%V inside the vim
>> > help...but didnt foudn a match. What is the correct
>> > keyword to find the according help?
>> >
>> > Best regards,
>> > mcc
>> >
>> >
>> >
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