snippetEmu.vimで補完を行う。

Twitter経由でid:otsuneさんの所から。
どうも最近snippetsEmu.vimが流行ってるらしい。
でdjango用もあります。
Modelは結構忘れてしまったりするのでなかなか重宝する。
昔は辞書登録して補完を行っていたけどこっちの方がスマートでいい。
とりあえずsnippetsの切り替えはFileTypeで判断している。
だからといってFileTypeをdjango_modelにすると既存のpythonのsnippetsが効かなくなのでこんな感じが良いのではないかな。

if !exists('loaded_snippet') || &cp
    finish
endif

" Updates to PyInit and PyInitVars provided by grayrest.
function! PyInit(text)
    if a:text != "args"
        return ', '.join(split(a:text,'\s*,\s*'),', ')
    else
        return ''
    endif
endfunction

function! PyRemDefVal(text)
    return substitute(a:text,'=.*','','g')
endfunction

function! PyInitVars(text)
    if a:text != "args"
        let text = substitute(a:text,'\*\*\?\k\+','','g')
        let text = substitute(text,'=.\{-},','','g')
        let text = substitute(text,'=.\{-}$','','g')
        let text = substitute(text,',',' ','g')

        if &expandtab
            let tabs = indent(".")/&shiftwidth
            let tabstr = repeat(' ',&shiftwidth)
        else
            let tabs = indent(".")/&tabstop
            let tabstr = '\t'
        endif
        let tab_text = repeat(tabstr,tabs)
        return join(map(split(text),'"self.".v:val." = ".v:val'),'\n'.tab_text)
    else
        return "pass"
    endif
endfunction

function! Count(haystack, needle)
    let counter = 0
    let index = match(a:haystack, a:needle)
    while index > -1
        let counter = counter + 1
        let index = match(a:haystack, a:needle, index+1)
    endwhile
    return counter
endfunction

function! PyArgList(count)
    " This needs to be Python specific as print expects a
    " tuple and an empty tuple looks like this (,) so we'll need to make a
    " special case for it
    let st = g:snip_start_tag
    let et = g:snip_end_tag

    if a:count == 0
        return "()"
    else
        return '('.repeat(st.et.', ', a:count).')'
    endif
endfunction

let st = g:snip_start_tag
let et = g:snip_end_tag
let cd = g:snip_elem_delim

" Note to users: The following method of defininf snippets is to allow for
" changes to the default tags.
" Feel free to define your own as so:
"    Snippet mysnip This is the expansion text.<{}>
" There is no need to use exec if you are happy to hardcode your own start and
" end tags

exec "Snippet pf print \"".st."s".et."\" % ".st."s:PyArgList(Count(@z, '%[^%]'))".et."<CR>".st.et
exec "Snippet get def get".st."name".et."(self): return self._".st."name".et."<CR>".st.et
exec "Snippet classi class ".st."ClassName".et." (".st."object".et."):<CR><CR><Tab>def __init__(self".st."args:PyInit(@z)".et."):<CR><Tab><Tab>".st."args:PyInitVars(@z)".et."<CR><CR><Tab><Tab>".st.et
exec "Snippet set def set".st."name".et."(self, ".st."newValue".et."):<CR><Tab>self._".st."name".et." = ".st."newValue:PyRemDefVal(@z)".et."<CR>".st.et
"exec "Snippet . self.".st.et
exec "Snippet def def ".st."fname".et."(".st."self".et."):<CR><Tab>".st."pass".et."<CR>".st.et
" Contributed by Panos
exec "Snippet ifn if __name__ == '__main__':<CR><Tab>".st.et
" Contributed by Kib2
exec "Snippet bc \"\"\"".st."description".et."\"\"\"<CR>".st.et
exec "Snippet lc # ".st."linecomment".et."<CR>".st.et
exec "Snippet sbl1 #!/usr/bin/env python<CR># -*- coding: Latin-1 -*-<CR>".st.et
exec "Snippet kfor for ".st."variable".et." in ".st."ensemble".et.":<CR><Tab>".st."pass".et."<CR>".st.et
exec "Snippet cm ".st."class".et." = classmethod(".st."class".et.")<CR>".st.et


if match(bufname(""), "models\.py") > -1
    function! DjangoArgList(count)
        let st = g:snip_start_tag
        let et = g:snip_end_tag
        if a:count == 0
            return "()"
        else
            return '('.repeat(st.et.', ',a:count).')'
        endif
    endfunction

    exec "Snippet mmodel class ".st.et."(models.Model):<CR><Tab>\"\"\"".st.":D('model description')".et."\"\"\"<CR><Tab>".st.et." = ".st.et."<CR><CR><Tab>class Admin:<CR><Tab><Tab>pass<CR><CR><Tab>def __str__(self):<CR><Tab><Tab>return \"".st."s".et."\" % ".st."s:DjangoArgList(Count(@z, '%[^%]'))".et."<CR>".st.et
    exec "Snippet mauto models.AutoField(".st.et.")".st.et
    exec "Snippet mbool models.BooleanField()".st.et
    exec "Snippet mchar models.CharField(maxlength=".st."50".et.st.et.")".st.et
    exec "Snippet mcsi models.CommaSeparatedIntegerField(maxlength=".st."50".et.st.et.")".st.et
    exec "Snippet mdate models.DateField(".st.et.")".st.et
    exec "Snippet mdatet models.DateTimeField(".st.et.")".st.et
    exec "Snippet memail models.EmailField(".st.et.")".st.et
    exec "Snippet mfile models.FileField(upload_to=\"".st.et."\"".st.et.")".st.et
    exec "Snippet mfilep models.FilePathField(path=\"".st.et."\"".st.et.")".st.et
    exec "Snippet mfloat models.FloatField(max_digits=".st.et.", decimal_places=".st.et.")".st.et
    exec "Snippet mimage models.ImageField(".st.et.")".st.et
    exec "Snippet mint models.IntegerField(".st.et.")".st.et
    exec "Snippet mipadd models.IPAddressField(".st.et.")".st.et
    exec "Snippet mnull models.NullBooleanField()".st.et
    exec "Snippet mphone models.PhoneNumberField(".st.et.")".st.et
    exec "Snippet mpint models.PositiveIntegerField(".st.et.")".st.et
    exec "Snippet mspint models.PositiveSmallIntegerField(".st.et.")".st.et
    exec "Snippet mslug models.SlugField(".st.et.")".st.et
    exec "Snippet msint models.SmallIntegerField(".st.et.")".st.et
    exec "Snippet mtext models.TextField(".st.et.")".st.et
    exec "Snippet mtime models.TimeField(".st.et.")".st.et
    exec "Snippet murl models.URLField(verify_exists=".st."True".et.st.et.")".st.et
    exec "Snippet muss models.USStateField(".st.et.")".st.et
    exec "Snippet mxml models.XMLField(schema_path=\"".st.et."\"".st.et.")".st.et
    exec "Snippet mfor models.ForeignKey(".st.et.")".st.et
    exec "Snippet mm2o models.ForeignKey(".st.et.")".st.et
    exec "Snippet mm2m models.ManyToManyField(".st.et.")".st.et
    exec "Snippet mo2o models.OneToOneField(".st.et.")".st.et
    exec "Snippet mman models.Manager()".st.et
endif
>

さらにデータベースAAPIとかあるともっといいかも知れない。
snippetsにはdjango_templateもあるので同じようにFileType htmlでかつファイル名にtemplatesが含まれるで補完が効くようにすればいい。
snippetsの登録は簡単なのである程度特化したもの（例えばjsの中でもprototype.jsやMochikitなど）も出てきそうだな。

うくく。