Filtering text out to new tab with custom command

Question

I would like to add to my vimrc a custom command (:customFilter {pattern}) for filtering text and placing result in a new tab.

I tried using :global or :vimgrep /{pattern}/ % but the problem is that I would like to redirect this result of global or content of Quickfix list (without name of file) to a new tab.

Please help.

Example

my file:

class TemperatureNode {
    + uint8_t getTemperatureValue()
    + void setTemperatureValue(uint8_t newVal)
    + uint8_t getHumidityValue()
    + void setHumidityValue(uint8_t newVal)
}

and then I call :customFilter void and get:

+ void setTemperatureValue(uint8_t newVal)
+ void setHumidityValue(uint8_t newVal)

Having this with line numbers from the filtered file would be even better.

Answer 1

You can create a new empty buffer in a new tab and then populate it with the result of a grep search on the previous file:

:tabnew|0r!grep -n pattern #

In a mapping:

nnoremap <key> :tabnew\|0r!grep -n  #<Left><Left>

Which works like this:

--- edit ---

Here is an alternative command that works with the current buffer instead of the current file:

:%y z|tabnew|0put=@z|%!grep -n pattern

Explanation:

:%y z                 " yank the whole buffer in register z
:tabnew               " edit a new buffer in a new tab
:0put=@z              " put the yanked text in that new buffer
:%!grep -n pattern    " do your filtering

As a command:

:command! -nargs=1 -range=% Filter <line1>,<line2>y z|tabnew|0put=@z|%!grep -n '<q-args>'

Usage:

:Filter pattern        " works on the whole buffer by default
:5,20Filter pattern    " works on the supplied range

Answer 2

First clear an register: qaq second, append all matching lines using the :g command:

:g/pattern/y A

Third, put all matches on a new page

:tabnew +$put\ A

If you want to be able to make changes on those filtered mached, have a look at my NrrwRgn Plugin. The advantage is, once you save the narrowed buffer, the changes will be taken back into the original buffer.