Implementing search / reverse search in vi mode on input

Implementing search / reverse search in vi mode on input

[Krzysztof Słonka]

[-- Attachment #1: Type: text/plain, Size: 324 bytes --]

Hello everyone,

I know that by using ctrl ] + / you can search through history, but I would
like to implement searching inside command input (the same way you can
search in vim, / for forward search and ? for backward).

Can someone point me in a good direction where to start and how to
implement it in ZSH?

Best regards

Re: Implementing search / reverse search in vi mode on input

[Bart Schaefer]

On Mon, Jan 18, 2016 at 12:26 AM, Krzysztof Słonka
<krzysztofslonka@gmail.com> wrote:
>
> I know that by using ctrl ] + / you can search through history, but I would
> like to implement searching inside command input (the same way you can
> search in vim, / for forward search and ? for backward).

Could you explain in more detail what you mean by "command input"?
And exactly when do you want to search it, relative to the execution
of the command?

I suspect you believe the shell is involved in a part of the process
where it really is not, but I can't be sure.

Re: Implementing search / reverse search in vi mode on input

[Krzysztof Słonka]

[-- Attachment #1: Type: text/plain, Size: 1282 bytes --]

The same way I can jump between words (normal mode + w, see:
http://vim.wikia.com/wiki/Moving_around) I would like to jump to search
phrase (normal mode + / word). Example ('_' indicates the cursor position):

ls -la /usr/local/bin/_

(When I type,    ctrl + [   B    , I will get)

ls -la _/usr/local/bin/

I would like to implement a feature that I can jump to the beginning of the
search phrase. Example:

ls -la /usr/local/bin/_

(  ctrl + [  /  ocal  )

ls -la /usr/l_oacl/bin/

So basically this: http://vim.wikia.com/wiki/Searching inside vi mode of zsh

Best regards

2016-01-18 18:29 GMT+01:00 Bart Schaefer <schaefer@brasslantern.com>:

> On Mon, Jan 18, 2016 at 12:26 AM, Krzysztof Słonka
> <krzysztofslonka@gmail.com> wrote:
> >
> > I know that by using ctrl ] + / you can search through history, but I
> would
> > like to implement searching inside command input (the same way you can
> > search in vim, / for forward search and ? for backward).
>
> Could you explain in more detail what you mean by "command input"?
> And exactly when do you want to search it, relative to the execution
> of the command?
>
> I suspect you believe the shell is involved in a part of the process
> where it really is not, but I can't be sure.
>

Re: Implementing search / reverse search in vi mode on input

[Bart Schaefer]

On Jan 18,  6:45pm, Krzysztof wrote:
}
} The same way I can jump between words (normal mode + w, see:
} http://vim.wikia.com/wiki/Moving_around) I would like to jump to search
} phrase (normal mode + / word).

Oh, I see, you want the search to include the current input buffer, not
begin with the preceding history entry.  I don't know why vi-* widgets
don't already work that way when emacs widgets do.

It might be sufficient to use one of the existing emacs builtin widgets
such as history-incremental-search-backward.  For more vi-like behavior,
you can wrap those up with something like this (untested):

    autoload -Uz read-from-minibuffer
    vi-search-buffer-or-history() {
      emulate -L zsh
      local mbprompt REPLY
      if [[ $WIDGET = *-backward ]]
      then mbprompt='?'
      else mbprompt='/'
      fi
      # May want to install a custom keymap here
      zle read-from-minibuffer $mbprompt
      if [[ $WIDGET = *-backward ]]
      then
        zle .incremental-history-search-backward $REPLY
      else
        zle .incremental-history-search-forward $REPLY
      fi
      # Handle $? as appropriate here:
      # 0 the search succeeded
      # 1 the search failed
      # 2 the search term was a bad pattern
      # 3 the search was aborted by send-break
    }

If you want even more control you can search the buffer yourself (this
is also untested but should be a reasonable outline):

    vi-search-buffer-or-history() {
      emulate -L zsh
      local mbprompt REPLY found
      if [[ $WIDGET = *-backward ]]
      then mbprompt='?'
      else mbprompt='/'
      fi
      # May want to install a custom keymap here
      zle read-from-minibuffer $mbprompt
      if [[ $WIDGET = *-backward ]]
      then
        found=${(MS)LBUFFER%$~REPLY*}
	# (m) for multibyte characters here, may not be needed
        if [[ -n $found ]]
        then (( CURSOR -= ${(m)#found} ))
        else zle vi-history-search-backward $REPLY
        fi
      else
        found=${(MS)RBUFFER#*$~REPLY}
	# (m) for multibyte characters here, may not be needed
        if [[ -n $found ]]
        then (( CURSOR += ${(m)#found} ))
        # Theoretically there is no "forward" from the current buffer
        # else zle vi-history-search-forward $REPLY
        fi
      fi
    }

Both of these would need handling of the LASTSEARCH parameter to allow
repeated calls, I haven't gone into that detail.