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--- vim [2009/01/22 10:59]
+++ vim [2009/01/22 10:59] (current)
@@ Line 1: / Line 1: @@
+====== VIM snippets ======
+===== Redirect Command output =====
+'':help :redir''
+===== Align columns in ASCII-art table (ala wiki syntax) =====
+<code>'<,'>v/^|[^|]\+\%27v|/ s/\(^|[^|]\+\)|/\1 |/</code>
+To repeat this command numerous times, record executing it as a macro, then use normal macro repetition.
+==== Wtf? ====
+The break down is below, but the gist is that we find lines of text which don't have a "|" in the column we want, and then use a substition to grab the text before the second "|" and add a space between them, hence pushing the "|" one column to the right. You then repeat this command until no substitions take place.
+<code>
+'<,'>            From mark "<" to mark ">" execute the following command
+v/ --- /         Check each line against Regular Expression "---", if it
+                 **doesn't** match do the following commands
+^|[^|]\+\%27v|   Match a vertical bar, followed by 1-or-more "not vertical bar"
+		 characters ( [^|]\+ ), followed by an assertion at we're in
+                 visual column 27 ( \%27v ), followed by a vertical bar
+s/ --- / ### /   Substitute text matching RegExp "---" with text in "###"
+\(^|[^|]\+\)|    (Match) Capture between \( and \) a vertical bar followed by 1
+		 or more not-vertical-bars. This capture should be immediately
+                 followed by a vertical bar
+\1 |             (Replacement) Put our first captured group back, followed by a
+                 space, followed by a vertical bar.
+</code>
+===== A complete function for aligning ASCII-art tables =====
+To use: source this into Vim (":source <filename>"), and then invoke AlignTable() over the range of the table. EG Visually select table and then "%%'<,'>call AlignTable()%%"
+<code vim>
+" Align a single ASCII-art table column
+" tcol: Which column of the table to align (i.e. first column = 1, second = 2 etc)
+" vcol: Align table column to which virtual/visual column on the screen?
+function! AlignTableColumn ( tcol, vcol ) range
+    let i = a:vcol - a:tcol " Worst case
+    while i
+	" Edge one screen column closer to desired location
+	execute 'silent! ' . a:firstline . ',' . a:lastline . 'v/^\(\(|[^|]*\)\{' . a:tcol . '}\)\%' . a:vcol . 'v|/ s/^\(\(|[^|]*\)\{' . a:tcol . '}\)|/\1 |/'
+	let i -= 1
+    endwhile
+endfunction
+" Align a whole ASCII-art table
+" Tables are expected to be drawn using "|" characters, including the header
+"
+" Usage: Invoke this function with the range of lines the table occupies,
+" including the header - which will be used as the "desired column location"
+"
+" TODO: Tally the maximum width for each column by scanning all rows, and use
+" these values to calculate new column boundry locations
+function! AlignTable() range
+    let header = getline(a:firstline)
+    let bars = 0
+    let i = 0
+    " Count number of "|"s
+    while i < strlen(header)
+	if header[i] == '|'
+	    let bars += 1
+	endif
+	let i += 1
+    endwhile
+    unlet i
+    unlet header
+    " Now get column widths for each row, keeping the maximum in colwidth
+    let colwidth = []
+    let i = bars
+    " Init list of correct length
+    while i
+	let colwidth += [0]
+	let i -= 1
+    endwhile
+    unlet i
+    let i = a:firstline
+    while i <= a:lastline
+	let row = getline(i)
+	let curbar = 0
+	let pos = 0
+	let poslist = []
+	while curbar < bars
+	    let pos = match(row, '|', pos)
+	    let poslist += [pos]
+	    let pos += 1 " Move past current match, ready for next
+	    if len(poslist) > 1
+		if colwidth[curbar] < ( poslist[curbar] - poslist[(curbar-1)] )
+		    let colwidth[curbar] = ( poslist[curbar] - poslist[(curbar-1)] )
+		endif
+	    endif
+	    let curbar += 1
+	endwhile
+	let i += 1
+    endwhile
+    let poslist = [ match(getline(a:firstline), '|') ]
+    call remove(colwidth, 0) " Strip first column (always width 0)
+    for width in colwidth
+	let poslist += [ (poslist[(len(poslist)-1)] + width) ]
+    endfor
+    " NB There is one more bar than there are cols, and we ignore the first
+    " bar
+    let i = 1
+    call remove(poslist, 0)
+    for vcol in poslist
+	" Note that every bar must be moved at least once to avoid bugs, hence
+	" the (vcol+1) below
+	execute (a:firstline).",".a:lastline."call AlignTableColumn(".i.", ".(vcol+1).")"
+	let i += 1
+    endfor
+endfunction
+</code>
+===== XMLFolding =====
+Adapted from [[http://www.vim.org/scripts/script.php?script_id=1438|XML Folding : Folds XML / HTML Tags, CDATA and comments]], by Thadeu Aparecido Coelho de Paula.
+<code vim>
+" Basic vim commands for folding definition
+syn sync fromstart
+set foldmethod=syntax
+"                                                ┌ Up to end-of-tag
+"                             Name of tag ╗      │      ┌ End-of-tag not preceeded by "/"
+"External capture ("\z1" in end= param) ┐ ║      │      │   ┌ End-of-tag
+"            Normal capture ("\1")═╦════╪═╬════╗ │      │   │ ┌ End-of-match
+"       Forbidden first chars ┐    ║ ┌──┴─╫──┐ ║ │      │   │ │  ┌ Assert that a matching closing tag occurs later
+"            Start of tag ┐┌──┴───┐║ │  ╔═╩╗ │ ║┌┴────┐┌┴──┐│┌┴┐┌┴──────┐
+syn region XMLFold start=#<[/?!]\@!\(\z(\S\+\)\)\_[^>]*/\@<!>\ze\_.*</\1># end=#</\z1># fold transparent keepend extend
+"                                                                               └───┬┘
+"                                                          Closing tag of same name ┘
+syn match XMLCData "<!\[CDATA\[\_.\{-}\]\]>" fold transparent extend
+syn match XMLCommentFold "<!--\_.\{-}-->" fold transparent extend
+" Label shown for folded lines
+set foldtext=XMLFoldLabel()
+ fun! XMLFoldLabel()
+  let getcontent = substitute(getline(v:foldstart), "^[[:space:]]*", "", 'g')
+	let linestart = substitute(v:folddashes, ".", '»', 'g')
+	return linestart . " " . getcontent
+endfunction
+</code>
+(The line drawings were made with the excellent [[http://www.vim.org/scripts/script.php?script_id=173|BoxDraw]] vim plugin by Andrew Nikitin.)
+===== Win32 Paths =====
+When under Cygwin, '''ifsname''' is set to the Unix default, which means that paths such as ''dir\to\file'' are broken up into sections when you try to <C-w><C-f> or ''gf'' to them.
+You can fix this with:
+<code>
+set isfname=@,48-57,/,\\,.,-,_,+,,,#,$,%,{,},[,],:,@-@,!,~,=
+</code>
+<html><!-- vim: set tw=78 ts=4 sw=4 ft=dokuwiki: --></html>
+===== Pop-up menu colours =====
+The default pop-up menu colour for auto-complete (e.g. ''^X^O'') is grey-on-pink, which is hard to read. So I added the following to my desert256 colour scheme:
+<code vim>
+" ~/.vim/colors/desert256.vim
+"Pmenu
+call <SID>X("Pmenu", "ffffff", "cc00cc", "")
+call <SID>X("PmenuSel", "ffffff", "990044", "")
+call <SID>X("PmenuSbar", "ffffff", "550077", "")
+call <SID>X("PmenuThumb", "ffffff", "440088", "")
+</code>
+See also [[http://www.mail-archive.com/vim@vim.org/msg11890.html|this post]] and '':help Pmenu''.
+Here's how it looks:
+{{:vim_popupmenu.png|Screenshot showing VIM's popup menu}}
+I really like the function summary in the lower pane, and all this for a Python module I wrote myself! I'm amazed that vim can work out the type of ''jobtags'' and then parse the classes help!

RobMeerman.co.uk

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