Using Vim’s Visual Block Mode

 vim  No Responses »
Jan 272012
 

Vim’s visual block mode is a feature that I hardly ever use but is extremely useful when I do need it.
You can highlight a column of text or numbers in the center of a page and perform various edit operations on that text. It is unbelievably powerful and I realize on writing this that I only use a fraction of the blockwise possibilities.

You enter Visual Blockwise mode with Control V however I uses that for Paste so have it remapped to Control Q

” Visual is the newest and usually the most intuitive editing mode

” Visual basics

v : enter visual mode

V : visual mode whole line

: enter VISUAL BLOCKWISE mode (remap on Windows to say C-Q *C*

gv : reselect last visual area (ultra)

o : navigate visual area

“*y or “+y : yank visual area into paste buffer [C]

V% : visualise what you match

V}J : Join Visual block (great)

V}gJ : Join Visual block w/o adding spaces

`[v`] : Highlight last insert

:%s/\%Vold/new/g : Do a substitute on last visual area [N]

:help blockwise-visual

 Posted by admin at 8:16 pm

Saving VimTips as a VIM Help Tags Page (make your own VIM help file)

 configuring vim, vim  No Responses »
Dec 122011
 
The following should all be on one line

:sav! $VIMRUNTIME/doc/vimtips.txt|:1,/^__BEGIN__/d|:/^__END__/,$d|:w!|:helptags $VIMRUNTIME/doc

Save the Vim Tips Web Page as an HTML file edit with VIM then execute the above line. This strips off the unwanted stuff outside the __BEGIN__ and __END__ tags, writes the remainder to the VIM Help Tags folder and then runs helptags to generate the tags. Note the above line of Vim commands is to be found in the VIMTips file execute it with yy@”

” A VIM Help file requires a line such at the start:

*vimtips.txt* For Vim version 7.3. Last change: 2011 Dec 11

” and a line such at the end
vim:tw=78:ts=8:ft=help:norl:

The Searchable Helptags are generated from any text enclosed by stars, replace any spaces by a hypen.
I’m used a leading “best to help me find my own help tags. eg

:help best will list my tags

This tip suggested by Fredrik Acosta

 Posted by admin at 11:13 pm

vimrc tips : Comment your .vimrc, Backup your .vimrc file

 configuring vim, vim  No Responses »
Nov 202011
 

Some Vim experts have a practically empty .vimrc file (the config file) others like me have a huge one unfortunately in my case that means there is a lot of dead wood in it. To counteract that I now comment my .vimrc file (the doublequote ” is the comment delimiter) and am gradually commenting older parts of my vimrc and deleting stuff that is no longer relevant or is just plain junk. Remember you can use conditionals in your .vimrc so that particular parts of the config only apply to say php files or distinguish whether you are on your laptop or PC. Finally be aware of the danger that something in your config could “hide” or counteract some of Vim’s functionality.

I regularly backup my .vimrc and also have a copy stashed away on the Internet that I can download and use should I have to set up with a new PC.

 Posted by admin at 12:01 pm

VIM: Replace a line with the contents of a file!

 vim  No Responses »
Oct 312011
 

This tip discusses replacing a marker line with the contents of a file

" replace string with contents of a file, -d deletes the "mark"
:g/^MARK$/r tmp.txt | -d

 Posted by admin at 9:26 am

Replacing Text AFTER a string

 vim  4 Responses »
Oct 302011
 
This is a common editing problem, I want to replace the first TD tag after a certain string.
So every time ‘string1′ is found replace the next td tag with string2 even if not on the same line.


:%s#string1\(\_.\{-}\)<td[^>]\+>#\1string2#

Explanation:-
\_.\{-} any non-greedy sequence of characters before td tag, multi-line if necessary.
\(..\) memorize it
[^>]\+> any sequence of character up until >

Principle:-
The memory part is important, it puts back the “unknown” string between string1 and string2 as \1.

The simpler same line only version


:%s#string1\(.\{-}\)<td[^>]\+>#&string2#

 Posted by admin at 10:53 pm

Pasting into Vim without the Junk

 vim  2 Responses »
Oct 092011
 

One irritation with the default set up of VIM is where you paste into a file and text is formatted either with unwanted tabs or is prefixed by a “comment” hash etc. As this is rarely what you want the setting to prevent this is:-

:set paste

Another problem is when you paste from say Microsoft Word and you get a lot of junk formatting codes

” filter non-printable characters from the paste buffer
” useful when pasting from some gui application
:nmap p :let @* = substitute(@*,’[^[:print:]]’,”,’g')“*

 Posted by admin at 11:28 am

Using gf to open root based include files : wonderful includeexpr

 vim  4 Responses »
Sep 222011
 
gf can open all files paths relative to the current directory eg:-
index.php
main/main.php
../index.php

But gf doesn’t know what to do with root based paths because it obviously has no idea where the file actually is. This is highly frustrating but as usual with vim there is a work around in fact there are several but the one I find horsiest is the recently introduced includeexpr.

This works by performing a virtual substitute on each root path it recognizes replacing the
root with a full path eg.
/js/main.js
with
/var/www/html/js/main.js

/var/www/html/js/main.js

:set includeexpr=substitute(v:fname,’/js/’,'/var/www/html/js/’,'g’)

Of course you have to set this up for each project you work depending on the root path.

 Posted by admin at 9:18 pm

Add your own menus to gVim , it’s Easy

 vim  No Responses »
Sep 052011
 

I’ve only recently started creating my own menus it’s really easy. I’m maxxed out on maps and abbreviations so find it useful to put stuff in these menus.


" in your _vimrc (or .vimrc)

The "My" identifier is the name of the Menu and binds all the commands together

amenu My.Insert\ a\ VIM\ modeline ggOvim:ff=unix ts=4 ss=4vim60:fdm=markergg
" fName: Only the filename (without path)
" fPath: Only the path
" rName: path+filename relative to current directory
amenu My.Copy\ fName :let @*=expand("%:t")
amenu My.Copy\ fPath :let @*=expand("%:p:h")
amenu My.Copy\ rName :let @*=expand("%:.")
amenu My.Tab\ sball :tab sball
amenu My.vimtips :tabe c:/intranet/vimtips.txt

 Posted by admin at 8:49 pm

Core Vim Skills You Should Have

 vim  2 Responses »
Jul 012011
 

There are so many aspects to Vim that defining any subset of skills is fairly arbitrary but here is a first stab at it.

You can consider yourself a proficient VIM user if you can :-


# 1: write a simple substitute
:%s/fred/joe/gic

# 2: write a substitute using memory
:'a,'bs/\<fred\>/& &/

# 3: Combine global with substitute (only do the substitute on lines containing fred)
:'a,'bg/fred/s/dick/joe/igc

# 4: Use a recording for small and big repetitive edits

# a simple recording 'q' to change character under cursor to aa equals, then descend a line
qqr=jq
repeat the recording q 55 times
55@q

# 5: Use registers. be happy using registers to store information for later use

# store current line to register a
"ayy

#store a block to the paste register
"*y}

# customising vim with maps and abbreviations

# 6: write a map to create a temporary composite command
# or permanent if stored in .vimrc

# eg insert date into a file
:inoremap \zd <C-R>=strftime("%d%b%y")<CR>

# eg read a text file
:map <f8> :r c:/aaa/x.txt

# 7: Use abbreviations

# eg spit out a PHP snippet
:iab phpif if ($a=='2')<CR>{<CR>}<CR>else<CR>{<CR>}<CR>

 Posted by admin at 10:53 am

Sorting Multiple Blocks with Vim

 vim  2 Responses »
May 122011
 

It can be very tedious to sort blocks of text in a long file . The following command will sort all blocks individually at the same time. Place an empty line at beginning and end of the file if there are none.


:g/^\s*$/;//-1sort

Explanation:-
:g/// operate over whole file
/^\s*$/ find empty line with or without white space
; after this search for
// as empty, repeats first search for empty line
-1sort

 Posted by admin at 11:40 am
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