" File: imaps.vim
" Authors: Srinath Avadhanula <srinath AT fastmail.fm>
" Benji Fisher <benji AT member.AMS.org>
"
" WWW: http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/vim-latex/vimfiles/plugin/imaps.vim?only_with_tag=MAIN
"
" Description: insert mode template expander with cursor placement
" while preserving filetype indentation.
"
" $Id: imaps.vim 997 2006-03-20 09:45:45Z srinathava $
"
" Documentation: {{{
"
" Motivation:
" this script provides a way to generate insert mode mappings which do not
" suffer from some of the problem of mappings and abbreviations while allowing
" cursor placement after the expansion. It can alternatively be thought of as
" a template expander.
"
" Consider an example. If you do
"
" imap lhs something
"
" then a mapping is set up. However, there will be the following problems:
" 1. the 'ttimeout' option will generally limit how easily you can type the
" lhs. if you type the left hand side too slowly, then the mapping will not
" be activated.
" 2. if you mistype one of the letters of the lhs, then the mapping is
" deactivated as soon as you backspace to correct the mistake.
"
" If, in order to take care of the above problems, you do instead
"
" iab lhs something
"
" then the timeout problem is solved and so is the problem of mistyping.
" however, abbreviations are only expanded after typing a non-word character.
" which causes problems of cursor placement after the expansion and invariably
" spurious spaces are inserted.
"
" Usage Example:
" this script attempts to solve all these problems by providing an emulation
" of imaps wchich does not suffer from its attendant problems. Because maps
" are activated without having to press additional characters, therefore
" cursor placement is possible. furthermore, file-type specific indentation is
" preserved, because the rhs is expanded as if the rhs is typed in literally
" by the user.
"
" The script already provides some default mappings. each "mapping" is of the
" form:
"
" call IMAP (lhs, rhs, ft)
"
" Some characters in the RHS have special meaning which help in cursor
" placement.
"
" Example One:
"
" call IMAP ("bit`", "\\begin{itemize}\<cr>\\item <++>\<cr>\\end{itemize}<++>", "tex")
"
" This effectively sets up the map for "bit`" whenever you edit a latex file.
" When you type in this sequence of letters, the following text is inserted:
"
" \begin{itemize}
" \item *
" \end{itemize}<++>
"
" where * shows the cursor position. The cursor position after inserting the
" text is decided by the position of the first "place-holder". Place holders
" are special characters which decide cursor placement and movement. In the
" example above, the place holder characters are <+ and +>. After you have typed
" in the item, press <C-j> and you will be taken to the next set of <++>'s.
" Therefore by placing the <++> characters appropriately, you can minimize the
" use of movement keys.
"
" NOTE: Set g:Imap_UsePlaceHolders to 0 to disable placeholders altogether.
" Set
" g:Imap_PlaceHolderStart and g:Imap_PlaceHolderEnd
" to something else if you want different place holder characters.
" Also, b:Imap_PlaceHolderStart and b:Imap_PlaceHolderEnd override the values
" of g:Imap_PlaceHolderStart and g:Imap_PlaceHolderEnd respectively. This is
" useful for setting buffer specific place hoders.
"
" Example Two:
" You can use the <C-r> command to insert dynamic elements such as dates.
" call IMAP ('date`', "\<c-r>=strftime('%b %d %Y')\<cr>", '')
"
" sets up the map for date` to insert the current date.
"
"--------------------------------------%<--------------------------------------
" Bonus: This script also provides a command Snip which puts tearoff strings,
" '----%<----' above and below the visually selected range of lines. The
" length of the string is chosen to be equal to the longest line in the range.
" Recommended Usage:
" '<,'>Snip
"--------------------------------------%<--------------------------------------
" }}}
" line continuation used here.
let s:save_cpo = &cpo
set cpo&vim
" ==============================================================================
" Script Options / Variables
" ==============================================================================
" Options {{{
if !exists('g:Imap_StickyPlaceHolders')
let g:Imap_StickyPlaceHolders = 1
endif
if !exists('g:Imap_DeleteEmptyPlaceHolders')
let g:Imap_DeleteEmptyPlaceHolders = 1
endif
" }}}
" Variables {{{
" s:LHS_{ft}_{char} will be generated automatically. It will look like
" s:LHS_tex_o = 'fo\|foo\|boo' and contain all mapped sequences ending in "o".
" s:Map_{ft}_{lhs} will be generated automatically. It will look like
" s:Map_c_foo = 'for(<++>; <++>; <++>)', the mapping for "foo".
"
" }}}
" ==============================================================================
" functions for easy insert mode mappings.
" ==============================================================================
" IMAP: Adds a "fake" insert mode mapping. {{{
" For example, doing
" IMAP('abc', 'def' ft)
" will mean that if the letters abc are pressed in insert mode, then
" they will be replaced by def. If ft != '', then the "mapping" will be
" specific to the files of type ft.
"
" Using IMAP has a few advantages over simply doing:
" imap abc def
" 1. with imap, if you begin typing abc, the cursor will not advance and
" long as there is a possible completion, the letters a, b, c will be
" displayed on on top of the other. using this function avoids that.
" 2. with imap, if a backspace or arrow key is pressed before completing
" the word, then the mapping is lost. this function allows movement.
" (this ofcourse means that this function is only limited to
" left-hand-sides which do not have movement keys or unprintable
" characters)
" It works by only mapping the last character of the left-hand side.
" when this character is typed in, then a reverse lookup is done and if
" the previous characters consititute the left hand side of the mapping,
" the previously typed characters and erased and the right hand side is
" inserted
" IMAP: set up a filetype specific mapping.
" Description:
" "maps" the lhs to rhs in files of type 'ft'. If supplied with 2
" additional arguments, then those are assumed to be the placeholder
" characters in rhs. If unspecified, then the placeholder characters
" are assumed to be '<+' and '+>' These placeholder characters in
" a:rhs are replaced with the users setting of
" [bg]:Imap_PlaceHolderStart and [bg]:Imap_PlaceHolderEnd settings.
"
function! IMAP(lhs, rhs, ft, ...)
" Find the place holders to save for IMAP_PutTextWithMovement() .
if a:0 < 2
let phs = '<+'
let phe = '+>'
else
let phs = a:1
let phe = a:2
endif
let hash = s:Hash(a:lhs)
let s:Map_{a:ft}_{hash} = a:rhs
let s:phs_{a:ft}_{hash} = phs
let s:phe_{a:ft}_{hash} = phe
" Add a:lhs to the list of left-hand sides that end with lastLHSChar:
let lastLHSChar = a:lhs[strlen(a:lhs)-1]
let hash = s:Hash(lastLHSChar)
if !exists("s:LHS_" . a:ft . "_" . hash)
let s:LHS_{a:ft}_{hash} = escape(a:lhs, '\')
else
let s:LHS_{a:ft}_{hash} = escape(a:lhs, '\') .'\|'. s:LHS_{a:ft}_{hash}
endif
" map only the last character of the left-hand side.
if lastLHSChar == ' '
let lastLHSChar = '<space>'
end
exe 'inoremap <silent>'
\ escape(lastLHSChar, '|')
\ '<C-r>=<SID>LookupCharacter("' .
\ escape(lastLHSChar, '\|"') .
\ '")<CR>'
endfunction
" }}}
" IMAP_list: list the rhs and place holders corresponding to a:lhs {{{
"
" Added mainly for debugging purposes, but maybe worth keeping.
function! IMAP_list(lhs)
let char = a:lhs[strlen(a:lhs)-1]
let charHash = s:Hash(char)
if exists("s:LHS_" . &ft ."_". charHash) && a:lhs =~ s:LHS_{&ft}_{charHash}
let ft = &ft
elseif exists("s:LHS__" . charHash) && a:lhs =~ s:LHS__{charHash}
let ft = ""
else
return ""
endif
let hash = s:Hash(a:lhs)
return "rhs = " . s:Map_{ft}_{hash} . " place holders = " .
\ s:phs_{ft}_{hash} . " and " . s:phe_{ft}_{hash}
endfunction
" }}}
" LookupCharacter: inserts mapping corresponding to this character {{{
"
" This function extracts from s:LHS_{&ft}_{a:char} or s:LHS__{a:char}
" the longest lhs matching the current text. Then it replaces lhs with the
" corresponding rhs saved in s:Map_{ft}_{lhs} .
" The place-holder variables are passed to IMAP_PutTextWithMovement() .
function! s:LookupCharacter(char)
if IMAP_GetVal('Imap_FreezeImap', 0) == 1
return a:char
endif
let charHash = s:Hash(a:char)
" The line so far, including the character that triggered this function:
let text = strpart(getline("."), 0, col(".")-1) . a:char
" Prefer a local map to a global one, even if the local map is shorter.
" Is this what we want? Do we care?
" Use '\V' (very no-magic) so that only '\' is special, and it was already
" escaped when building up s:LHS_{&ft}_{charHash} .
if exists("s:LHS_" . &ft . "_" . charHash)
\ && text =~ "\\C\\V\\(" . s:LHS_{&ft}_{charHash} . "\\)\\$"
let ft = &ft
elseif exists("s:LHS__" . charHash)
\ && text =~ "\\C\\V\\(" . s:LHS__{charHash} . "\\)\\$"
let ft = ""
else
" If this is a character which could have been used to trigger an
" abbreviation, check if an abbreviation exists.
if a:char !~ '\k'
let lastword = matchstr(getline('.'), '\k\+$', '')
call IMAP_Debug('getting lastword = ['.lastword.']', 'imap')
if lastword != ''
" An extremeley wierd way to get around the fact that vim
" doesn't have the equivalent of the :mapcheck() function for
" abbreviations.
let _a = @a
exec "redir @a | silent! iab ".lastword." | redir END"
let abbreviationRHS = matchstr(@a."\n", "\n".'i\s\+'.lastword.'\s\+@\?\zs.*\ze'."\n")
call IMAP_Debug('getting abbreviationRHS = ['.abbreviationRHS.']', 'imap')
if @a =~ "No abbreviation found" || abbreviationRHS == ""
let @a = _a
return a:char
endif
let @a = _a
let abbreviationRHS = escape(abbreviationRHS, '\<"')
exec 'let abbreviationRHS = "'.abbreviationRHS.'"'
let lhs = lastword.a:char
let rhs = abbreviationRHS.a:char
let phs = IMAP_GetPlaceHolderStart()
let phe = IMAP_GetPlaceHolderEnd()
else
return a:char
endif
else
return a:char
endif
endif
" Find the longest left-hand side that matches the line so far.
" matchstr() returns the match that starts first. This automatically
" ensures that the longest LHS is used for the mapping.
if !exists('lhs') || !exists('rhs')
let lhs = matchstr(text, "\\C\\V\\(" . s:LHS_{ft}_{charHash} . "\\)\\$")
let hash = s:Hash(lhs)
let rhs = s:Map_{ft}_{hash}
let phs = s:phs_{ft}_{hash}
let phe = s:phe_{ft}_{hash}
endif
if strlen(lhs) == 0
return a:char
endif
" enough back-spaces to erase the left-hand side; -1 for the last
" character typed:
let bs = substitute(strpart(lhs, 1), ".", "\<bs>", "g")
return bs . IMAP_PutTextWithMovement(rhs, phs, phe)
endfunction
" }}}
" IMAP_PutTextWithMovement: returns the string with movement appended {{{
" Description:
" If a:str contains "placeholders", then appends movement commands to
" str in a way that the user moves to the first placeholder and enters
" insert or select mode. If supplied with 2 additional arguments, then
" they are assumed to be the placeholder specs. Otherwise, they are
" assumed to be '<+' and '+>'. These placeholder chars are replaced
" with the users settings of [bg]:Imap_PlaceHolderStart and
" [bg]:Imap_PlaceHolderEnd.
function! IMAP_PutTextWithMovement(str, ...)
" The placeholders used in the particular input string. These can be
" different from what the user wants to use.
if a:0 < 2
let phs = '<+'
let phe = '+>'
else
let phs = escape(a:1, '\')
let phe = escape(a:2, '\')
endif
let text = a:str
" The user's placeholder settings.
let phsUser = IMAP_GetPlaceHolderStart()
let pheUser = IMAP_GetPlaceHolderEnd()
" Problem: depending on the setting of the 'encoding' option, a character
" such as "\xab" may not match itself. We try to get around this by
" changing the encoding of all our strings. At the end, we have to
" convert text back.
let phsEnc = s:Iconv(phs, "encode")
let pheEnc = s:Iconv(phe, "encode")
let phsUserEnc = s:Iconv(phsUser, "encode")
let pheUserEnc = s:Iconv(pheUser, "encode")
let textEnc = s:Iconv(text, "encode")
if textEnc != text
let textEncoded = 1
else
let textEncoded = 0
endif
let pattern = '\V\(\.\{-}\)' .phs. '\(\.\{-}\)' .phe. '\(\.\*\)'
" If there are no placeholders, just return the text.
if textEnc !~ pattern
call IMAP_Debug('Not getting '.phs.' and '.phe.' in '.textEnc, 'imap')
return text
endif
" Break text up into "initial <+template+> final"; any piece may be empty.
let initialEnc = substitute(textEnc, pattern, '\1', '')
let templateEnc = substitute(textEnc, pattern, '\2', '')
let finalEnc = substitute(textEnc, pattern, '\3', '')
" If the user does not want to use placeholders, then remove all but the
" first placeholder.
" Otherwise, replace all occurences of the placeholders here with the
" user's choice of placeholder settings.
if exists('g:Imap_UsePlaceHolders') && !g:Imap_UsePlaceHolders
let finalEnc = substitute(finalEnc, '\V'.phs.'\.\{-}'.phe, '', 'g')
else
let finalEnc = substitute(finalEnc, '\V'.phs.'\(\.\{-}\)'.phe,
\ phsUserEnc.'\1'.pheUserEnc, 'g')
endif
" The substitutions are done, so convert back, if necessary.
if textEncoded
let initial = s:Iconv(initialEnc, "decode")
let template = s:Iconv(templateEnc, "decode")
let final = s:Iconv(finalEnc, "decode")
else
let initial = initialEnc
let template = templateEnc
let final = finalEnc
endif
" Build up the text to insert:
" 1. the initial text plus an extra character;
" 2. go to Normal mode with <C-\><C-N>, so it works even if 'insertmode'
" is set, and mark the position;
" 3. replace the extra character with tamplate and final;
" 4. back to Normal mode and restore the cursor position;
" 5. call IMAP_Jumpfunc().
let template = phsUser . template . pheUser
" Old trick: insert and delete a character to get the same behavior at
" start, middle, or end of line and on empty lines.
let text = initial . "X\<C-\>\<C-N>:call IMAP_Mark('set')\<CR>\"_s"
let text = text . template . final
let text = text . "\<C-\>\<C-N>:call IMAP_Mark('go')\<CR>"
let text = text . "i\<C-r>=IMAP_Jumpfunc('', 1)\<CR>"
call IMAP_Debug('IMAP_PutTextWithMovement: text = ['.text.']', 'imap')
return text
endfunction
" }}}
" IMAP_Jumpfunc: takes user to next <+place-holder+> {{{
" Author: Luc Hermitte
" Arguments:
" direction: flag for the search() function. If set to '', search forwards,
" if 'b', then search backwards. See the {flags} argument of the
" |search()| function for valid values.
" inclusive: In vim, the search() function is 'exclusive', i.e we always goto
" next cursor match even if there is a match starting from the
" current cursor position. Setting this argument to 1 makes
" IMAP_Jumpfunc() also respect a match at the current cursor
" position. 'inclusive'ness is necessary for IMAP() because a
" placeholder string can occur at the very beginning of a map which
" we want to select.
" We use a non-zero value only in special conditions. Most mappings
" should use a zero value.
function! IMAP_Jumpfunc(direction, inclusive)
" The user's placeholder settings.
let phsUser = IMAP_GetPlaceHolderStart()
let pheUser = IMAP_GetPlaceHolderEnd()
let searchString = ''
" If this is not an inclusive search or if it is inclusive, but the
" current cursor position does not contain a placeholder character, then
" search for the placeholder characters.
if !a:inclusive || strpart(getline('.'), col('.')-1) !~ '\V\^'.phsUser
let searchString = '\V'.phsUser.'\_.\{-}'.pheUser
endif
" If we didn't find any placeholders return quietly.
if searchString != '' && !search(searchString, a:direction)
return ''
endif
" Open any closed folds and make this part of the text visible.
silent! foldopen!
" Calculate if we have an empty placeholder or if it contains some
" description.
let template =
\ matchstr(strpart(getline('.'), col('.')-1),
\ '\V\^'.phsUser.'\zs\.\{-}\ze\('.pheUser.'\|\$\)')
let placeHolderEmpty = !strlen(template)
" If we are selecting in exclusive mode, then we need to move one step to
" the right
let extramove = ''
if &selection == 'exclusive'
let extramove = 'l'
endif
" Select till the end placeholder character.
let movement = "\<C-o>v/\\V".pheUser."/e\<CR>".extramove
" First remember what the search pattern was. s:RemoveLastHistoryItem will
" reset @/ to this pattern so we do not create new highlighting.
let g:Tex_LastSearchPattern = @/
" Now either goto insert mode or select mode.
if placeHolderEmpty && g:Imap_DeleteEmptyPlaceHolders
" delete the empty placeholder into the blackhole.
return movement."\"_c\<C-o>:".s:RemoveLastHistoryItem."\<CR>"
else
return movement."\<C-\>\<C-N>:".s:RemoveLastHistoryItem."\<CR>gv\<C-g>"
endif
endfunction
" }}}
" Maps for IMAP_Jumpfunc {{{
"
" These mappings use <Plug> and thus provide for easy user customization. When
" the user wants to map some other key to jump forward, he can do for
" instance:
" nmap ,f <plug>IMAP_JumpForward
" etc.
" jumping forward and back in insert mode.
imap <silent> <Plug>IMAP_JumpForward <c-r>=IMAP_Jumpfunc('', 0)<CR>
imap <silent> <Plug>IMAP_JumpBack <c-r>=IMAP_Jumpfunc('b', 0)<CR>
" jumping in normal mode
nmap <silent> <Plug>IMAP_JumpForward i<c-r>=IMAP_Jumpfunc('', 0)<CR>
nmap <silent> <Plug>IMAP_JumpBack i<c-r>=IMAP_Jumpfunc('b', 0)<CR>
" deleting the present selection and then jumping forward.
vmap <silent> <Plug>IMAP_DeleteAndJumpForward "_<Del>i<c-r>=IMAP_Jumpfunc('', 0)<CR>
vmap <silent> <Plug>IMAP_DeleteAndJumpBack "_<Del>i<c-r>=IMAP_Jumpfunc('b', 0)<CR>
" jumping forward without deleting present selection.
vmap <silent> <Plug>IMAP_JumpForward <C-\><C-N>i<c-r>=IMAP_Jumpfunc('', 0)<CR>
vmap <silent> <Plug>IMAP_JumpBack <C-\><C-N>`<i<c-r>=IMAP_Jumpfunc('b', 0)<CR>
" }}}
" Default maps for IMAP_Jumpfunc {{{
" map only if there is no mapping already. allows for user customization.
" NOTE: Default mappings for jumping to the previous placeholder are not
" provided. It is assumed that if the user will create such mappings
" hself if e so desires.
if !hasmapto('<Plug>IMAP_JumpForward', 'i')
imap <C-J> <Plug>IMAP_JumpForward
endif
if !hasmapto('<Plug>IMAP_JumpForward', 'n')
nmap <C-J> <Plug>IMAP_JumpForward
endif
if exists('g:Imap_StickyPlaceHolders') && g:Imap_StickyPlaceHolders
if !hasmapto('<Plug>IMAP_JumpForward', 'v')
vmap <C-J> <Plug>IMAP_JumpForward
endif
else
if !hasmapto('<Plug>IMAP_DeleteAndJumpForward', 'v')
vmap <C-J> <Plug>IMAP_DeleteAndJumpForward
endif
endif
" }}}
nmap <silent> <script> <plug><+SelectRegion+> `<v`>
" ==============================================================================
" enclosing selected region.
" ==============================================================================
" VEnclose: encloses the visually selected region with given arguments {{{
" Description: allows for differing action based on visual line wise
" selection or visual characterwise selection. preserves the
" marks and search history.
function! VEnclose(vstart, vend, VStart, VEnd)
" its characterwise if
" 1. characterwise selection and valid values for vstart and vend.
" OR
" 2. linewise selection and invalid values for VStart and VEnd
if (visualmode() == 'v' && (a:vstart != '' || a:vend != '')) || (a:VStart == '' && a:VEnd == '')
let newline = ""
let _r = @r
let normcmd = "normal! \<C-\>\<C-n>`<v`>\"_s"
exe "normal! \<C-\>\<C-n>`<v`>\"ry"
if @r =~ "\n$"
let newline = "\n"
let @r = substitute(@r, "\n$", '', '')
endif
" In exclusive selection, we need to select an extra character.
if &selection == 'exclusive'
let movement = 8
else
let movement = 7
endif
let normcmd = normcmd.
\ a:vstart."!!mark!!".a:vend.newline.
\ "\<C-\>\<C-N>?!!mark!!\<CR>v".movement."l\"_s\<C-r>r\<C-\>\<C-n>"
" this little if statement is because till very recently, vim used to
" report col("'>") > length of selected line when `> is $. on some
" systems it reports a -ve number.
if col("'>") < 0 || col("'>") > strlen(getline("'>"))
let lastcol = strlen(getline("'>"))
else
let lastcol = col("'>")
endif
if lastcol - col("'<") != 0
let len = lastcol - col("'<")
else
let len = ''
endif
" the next normal! is for restoring the marks.
let normcmd = normcmd."`<v".len."l\<C-\>\<C-N>"
" First remember what the search pattern was. s:RemoveLastHistoryItem
" will reset @/ to this pattern so we do not create new highlighting.
let g:Tex_LastSearchPattern = @/
silent! exe normcmd
" this is to restore the r register.
let @r = _r
" and finally, this is to restore the search history.
execute s:RemoveLastHistoryItem
else
exec 'normal! `<O'.a:VStart."\<C-\>\<C-n>"
exec 'normal! `>o'.a:VEnd."\<C-\>\<C-n>"
if &indentexpr != ''
silent! normal! `<kV`>j=
endif
silent! normal! `>
endif
endfunction
" }}}
" ExecMap: adds the ability to correct an normal/visual mode mapping. {{{
" Author: Hari Krishna Dara <hari_vim@yahoo.com>
" Reads a normal mode mapping at the command line and executes it with the
" given prefix. Press <BS> to correct and <Esc> to cancel.
function! ExecMap(prefix, mode)
" Temporarily remove the mapping, otherwise it will interfere with the
" mapcheck call below:
let myMap = maparg(a:prefix, a:mode)
exec a:mode."unmap ".a:prefix
" Generate a line with spaces to clear the previous message.
let i = 1
let clearLine = "\r"
while i < &columns
let clearLine = clearLine . ' '
let i = i + 1
endwhile
let mapCmd = a:prefix
let foundMap = 0
let breakLoop = 0
echon "\rEnter Map: " . mapCmd
while !breakLoop
let char = getchar()
if char !~ '^\d\+$'
if char == "\<BS>"
let mapCmd = strpart(mapCmd, 0, strlen(mapCmd) - 1)
endif
else " It is the ascii code.
let char = nr2char(char)
if char == "\<Esc>"
let breakLoop = 1
else
let mapCmd = mapCmd . char
if maparg(mapCmd, a:mode) != ""
let foundMap = 1
let breakLoop = 1
elseif mapcheck(mapCmd, a:mode) == ""
let mapCmd = strpart(mapCmd, 0, strlen(mapCmd) - 1)
endif
endif
endif
echon clearLine
echon "\rEnter Map: " . mapCmd
endwhile
if foundMap
if a:mode == 'v'
" use a plug to select the region instead of using something like
" `<v`> to avoid problems caused by some of the characters in
" '`<v`>' being mapped.
let gotoc = "\<plug><+SelectRegion+>"
else
let gotoc = ''
endif
exec "normal ".gotoc.mapCmd
endif
exec a:mode.'noremap '.a:prefix.' '.myMap
endfunction
" }}}
" ==============================================================================
" helper functions
" ==============================================================================
" Strntok: extract the n^th token from a list {{{
" example: Strntok('1,23,3', ',', 2) = 23
fun! <SID>Strntok(s, tok, n)
return matchstr( a:s.a:tok[0], '\v(\zs([^'.a:tok.']*)\ze['.a:tok.']){'.a:n.'}')
endfun
" }}}
" s:RemoveLastHistoryItem: removes last search item from search history {{{
" Description: Execute this string to clean up the search history.
let s:RemoveLastHistoryItem = ':call histdel("/", -1)|let @/=g:Tex_LastSearchPattern'
" }}}
" s:Hash: Return a version of a string that can be used as part of a variable" {{{
" name.
" Converts every non alphanumeric character into _{ascii}_ where {ascii} is
" the ASCII code for that character...
fun! s:Hash(text)
return substitute(a:text, '\([^[:alnum:]]\)',
\ '\="_".char2nr(submatch(1))."_"', 'g')
endfun
"" }}}
" IMAP_GetPlaceHolderStart and IMAP_GetPlaceHolderEnd: "{{{
" return the buffer local placeholder variables, or the global one, or the default.
function! IMAP_GetPlaceHolderStart()
if exists("b:Imap_PlaceHolderStart") && strlen(b:Imap_PlaceHolderEnd)
return b:Imap_PlaceHolderStart
elseif exists("g:Imap_PlaceHolderStart") && strlen(g:Imap_PlaceHolderEnd)
return g:Imap_PlaceHolderStart
else
return "<+"
endfun
function! IMAP_GetPlaceHolderEnd()
if exists("b:Imap_PlaceHolderEnd") && strlen(b:Imap_PlaceHolderEnd)
return b:Imap_PlaceHolderEnd
elseif exists("g:Imap_PlaceHolderEnd") && strlen(g:Imap_PlaceHolderEnd)
return g:Imap_PlaceHolderEnd
else
return "+>"
endfun
" }}}
" s:Iconv: a wrapper for iconv()" {{{
" Problem: after
" let text = "\xab"
" (or using the raw 8-bit ASCII character in a file with 'fenc' set to
" "latin1") if 'encoding' is set to utf-8, then text does not match itself:
" echo text =~ text
" returns 0.
" Solution: When this happens, a re-encoded version of text does match text:
" echo iconv(text, "latin1", "utf8") =~ text
" returns 1. In this case, convert text to utf-8 with iconv().
" TODO: Is it better to use &encoding instead of "utf8"? Internally, vim
" uses utf-8, and can convert between latin1 and utf-8 even when compiled with
" -iconv, so let's try using utf-8.
" Arguments:
" a:text = text to be encoded or decoded
" a:mode = "encode" (latin1 to utf8) or "decode" (utf8 to latin1)
" Caution: do not encode and then decode without checking whether the text
" has changed, becuase of the :if clause in encoding!
function! s:Iconv(text, mode)
if a:mode == "decode"
return iconv(a:text, "utf8", "latin1")
endif
if a:text =~ '\V\^' . escape(a:text, '\') . '\$'
return a:text
endif
let textEnc = iconv(a:text, "latin1", "utf8")
if textEnc !~ '\V\^' . escape(a:text, '\') . '\$'
call IMAP_Debug('Encoding problems with text '.a:text.' ', 'imap')
endif
return textEnc
endfun
"" }}}
" IMAP_Debug: interface to Tex_Debug if available, otherwise emulate it {{{
" Description:
" Do not want a memory leak! Set this to zero so that imaps always
" starts out in a non-debugging mode.
if !exists('g:Imap_Debug')
let g:Imap_Debug = 0
endif
function! IMAP_Debug(string, pattern)
if !g:Imap_Debug
return
endif
if exists('*Tex_Debug')
call Tex_Debug(a:string, a:pattern)
else
if !exists('s:debug_'.a:pattern)
let s:debug_{a:pattern} = a:string
else
let s:debug_{a:pattern} = s:debug_{a:pattern}.a:string
endif
endif
endfunction " }}}
" IMAP_DebugClear: interface to Tex_DebugClear if avaialable, otherwise emulate it {{{
" Description:
function! IMAP_DebugClear(pattern)
if exists('*Tex_DebugClear')
call Tex_DebugClear(a:pattern)
else
let s:debug_{a:pattern} = ''
endif
endfunction " }}}
" IMAP_PrintDebug: interface to Tex_DebugPrint if avaialable, otherwise emulate it {{{
" Description:
function! IMAP_PrintDebug(pattern)
if exists('*Tex_PrintDebug')
call Tex_PrintDebug(a:pattern)
else
if exists('s:debug_'.a:pattern)
echo s:debug_{a:pattern}
endif
endif
endfunction " }}}
" IMAP_Mark: Save the cursor position (if a:action == 'set') in a" {{{
" script-local variable; restore this position if a:action == 'go'.
let s:Mark = "(0,0)"
let s:initBlanks = ''
function! IMAP_Mark(action)
if a:action == 'set'
let s:Mark = "(" . line(".") . "," . col(".") . ")"
let s:initBlanks = matchstr(getline('.'), '^\s*')
elseif a:action == 'go'
execute "call cursor" s:Mark
let blanksNow = matchstr(getline('.'), '^\s*')
if strlen(blanksNow) > strlen(s:initBlanks)
execute 'silent! normal! '.(strlen(blanksNow) - strlen(s:initBlanks)).'l'
elseif strlen(blanksNow) < strlen(s:initBlanks)
execute 'silent! normal! '.(strlen(s:initBlanks) - strlen(blanksNow)).'h'
endif
endif
endfunction "" }}}
" IMAP_GetVal: gets the value of a variable {{{
" Description: first checks window local, then buffer local etc.
function! IMAP_GetVal(name, ...)
if a:0 > 0
let default = a:1
else
let default = ''
endif
if exists('w:'.a:name)
return w:{a:name}
elseif exists('b:'.a:name)
return b:{a:name}
elseif exists('g:'.a:name)
return g:{a:name}
else
return default
endif
endfunction " }}}
" ==============================================================================
" A bonus function: Snip()
" ==============================================================================
" Snip: puts a scissor string above and below block of text {{{
" Desciption:
"-------------------------------------%<-------------------------------------
" this puts a the string "--------%<---------" above and below the visually
" selected block of lines. the length of the 'tearoff' string depends on the
" maximum string length in the selected range. this is an aesthetically more
" pleasing alternative instead of hardcoding a length.
"-------------------------------------%<-------------------------------------
function! <SID>Snip() range
let i = a:firstline
let maxlen = -2
" find out the maximum virtual length of each line.
while i <= a:lastline
exe i
let length = virtcol('$')
let maxlen = (length > maxlen ? length : maxlen)
let i = i + 1
endwhile
let maxlen = (maxlen > &tw && &tw != 0 ? &tw : maxlen)
let half = maxlen/2
exe a:lastline
" put a string below
exe "norm! o\<esc>".(half - 1)."a-\<esc>A%<\<esc>".(half - 1)."a-"
" and above. its necessary to put the string below the block of lines
" first because that way the first line number doesnt change...
exe a:firstline
exe "norm! O\<esc>".(half - 1)."a-\<esc>A%<\<esc>".(half - 1)."a-"
endfunction
com! -nargs=0 -range Snip :<line1>,<line2>call <SID>Snip()
" }}}
let &cpo = s:save_cpo
" vim:ft=vim:ts=4:sw=4:noet:fdm=marker:commentstring=\"\ %s:nowrap