Vis: A Vim-Like Text Editor

Post by efaref » Thu, Apr 07, 2016, 8:53 AM UTC

chris_wot wrote: post #5

dhoe wrote: post #3

Looks promising, and support for huge files is a weak point in vim, so I gave it a try. My usual workflow with big logfiles is to zoom into certain types of messages with e.g. :v/error/d and back out with u, and alternatively jump from one occurrence of a string to the next with *. That doesn't seem to work, so for the moment it's not the right 80% for me. But I do think it's a worthy project, so I'll keep an eye on…

What does :v do?

Post by creshal » Thu, Apr 07, 2016, 9:10 AM UTC

efaref wrote: post #12

chris_wot wrote: post #5

Earlier quoted context omitted.

What does :v do?

:help :v will tell you: :[range]v[global]/{pattern}/[cmd] Same as :g!. Where: :[range]g[lobal]!/{pattern}/[cmd] Execute the Ex command [cmd] (default ":p") on the lines within [range] where {pattern} does NOT match. So :v/error/d will delete all lines that don't contain the string "error".

Post by martanne » Thu, Apr 07, 2016, 9:26 AM UTC

C0d3r wrote: post #2

That video needs sound, I have no idea about what's happening.

    - x/pattern/  extracts stuff from the text, creates a selection for every match
    - some normal vi motions are used to modify the selections, "o" to move the
      cursor from one end of the selection to the other, "w" to move the cursor
      to the start of the next word
    - y/,/ similar to x/ but create a selection for everything which does not match,
      hence splitting the existing selection  into multiple ones
    - \ trim selections i.e. remove leading and trailing white space
    - v/Vis keep all selection not matching Vis
    - g/F|C keep all selection matching F|C
    - + rotate selection contents on the same line
    - v/Com keep all selection not matching Com
    - + rotate some more
    - ESC clear selections, ESC remove all cursors
    - x/pattern select different regions
    - .,/^\} extend selection by searching in forward direction until the first match
      of } at the start of a line
    - { i/#if 0\n/ a/\n#endif/ } insert some text before every selection with i/text/
      and append some text after every selection with a/text/
   
    - change file, select similarily indented code block using a text object: vi
    - x/\w+ extracts all words from selection
    - Tab align selections
    - C-c remove first selection column (i.e. remove first selection on every line)
    - Esc clear selections, switch to normal mode, move to next { with f{
    - i goto insert mode and align cursors

    - search a variable, select it with C-n
    - C-n select next match
    - C-x skip this match, that is clear it and select next match
    - C-n select next match
    - c vi change operator, delete selection, switch to insert mode
    - rename the variable, switch back to normal mode
    - undo the changes

Post by nitrogen » Thu, Apr 07, 2016, 9:33 AM UTC

cturner wrote: post #9

pttrsmrt wrote: post #4

But what does it got that vim doesn't?

Sam expressions for manipulating text. This is a blub thing - if you haven't seen them you might not realise what you're missing out on. Try to imagine an editor where the core idea is a better-sed-than-sed. Two well-known editors to come from the ed tradition: vi and sam. Vi is an obvious evolution - make it 2d. Sam did this as well, but its main focus was developing the expression language. For example, so you can…

Post by amelius » Thu, Apr 07, 2016, 9:39 AM UTC

creshal wrote: post #14

efaref wrote: post #12

Earlier quoted context omitted.

:help :v will tell you: :[range]v[global]/{pattern}/[cmd] Same as :g!. Where: :[range]g[lobal]!/{pattern}/[cmd] Execute the Ex command [cmd] (default ":p") on the lines within [range] where {pattern} does NOT match. So :v/error/d will delete all lines that don't contain the string "error".

Which neatly maps to grep's -v option that does the same.