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Diffstat (limited to 'runtime/autoload/ccomplete.vim')
| -rw-r--r-- | runtime/autoload/ccomplete.vim | 637 |
1 files changed, 637 insertions, 0 deletions
diff --git a/runtime/autoload/ccomplete.vim b/runtime/autoload/ccomplete.vim new file mode 100644 index 0000000..156b3af --- /dev/null +++ b/runtime/autoload/ccomplete.vim @@ -0,0 +1,637 @@ +" Vim completion script +" Language: C +" Maintainer: Bram Moolenaar <Bram@vim.org> +" Last Change: 2018 Aug 20 + +let s:cpo_save = &cpo +set cpo&vim + +" This function is used for the 'omnifunc' option. +function! ccomplete#Complete(findstart, base) + if a:findstart + " Locate the start of the item, including ".", "->" and "[...]". + let line = getline('.') + let start = col('.') - 1 + let lastword = -1 + while start > 0 + if line[start - 1] =~ '\w' + let start -= 1 + elseif line[start - 1] =~ '\.' + if lastword == -1 + let lastword = start + endif + let start -= 1 + elseif start > 1 && line[start - 2] == '-' && line[start - 1] == '>' + if lastword == -1 + let lastword = start + endif + let start -= 2 + elseif line[start - 1] == ']' + " Skip over [...]. + let n = 0 + let start -= 1 + while start > 0 + let start -= 1 + if line[start] == '[' + if n == 0 + break + endif + let n -= 1 + elseif line[start] == ']' " nested [] + let n += 1 + endif + endwhile + else + break + endif + endwhile + + " Return the column of the last word, which is going to be changed. + " Remember the text that comes before it in s:prepended. + if lastword == -1 + let s:prepended = '' + return start + endif + let s:prepended = strpart(line, start, lastword - start) + return lastword + endif + + " Return list of matches. + + let base = s:prepended . a:base + + " Don't do anything for an empty base, would result in all the tags in the + " tags file. + if base == '' + return [] + endif + + " init cache for vimgrep to empty + let s:grepCache = {} + + " Split item in words, keep empty word after "." or "->". + " "aa" -> ['aa'], "aa." -> ['aa', ''], "aa.bb" -> ['aa', 'bb'], etc. + " We can't use split, because we need to skip nested [...]. + " "aa[...]" -> ['aa', '[...]'], "aa.bb[...]" -> ['aa', 'bb', '[...]'], etc. + let items = [] + let s = 0 + let arrays = 0 + while 1 + let e = match(base, '\.\|->\|\[', s) + if e < 0 + if s == 0 || base[s - 1] != ']' + call add(items, strpart(base, s)) + endif + break + endif + if s == 0 || base[s - 1] != ']' + call add(items, strpart(base, s, e - s)) + endif + if base[e] == '.' + let s = e + 1 " skip over '.' + elseif base[e] == '-' + let s = e + 2 " skip over '->' + else + " Skip over [...]. + let n = 0 + let s = e + let e += 1 + while e < len(base) + if base[e] == ']' + if n == 0 + break + endif + let n -= 1 + elseif base[e] == '[' " nested [...] + let n += 1 + endif + let e += 1 + endwhile + let e += 1 + call add(items, strpart(base, s, e - s)) + let arrays += 1 + let s = e + endif + endwhile + + " Find the variable items[0]. + " 1. in current function (like with "gd") + " 2. in tags file(s) (like with ":tag") + " 3. in current file (like with "gD") + let res = [] + if searchdecl(items[0], 0, 1) == 0 + " Found, now figure out the type. + " TODO: join previous line if it makes sense + let line = getline('.') + let col = col('.') + if stridx(strpart(line, 0, col), ';') != -1 + " Handle multiple declarations on the same line. + let col2 = col - 1 + while line[col2] != ';' + let col2 -= 1 + endwhile + let line = strpart(line, col2 + 1) + let col -= col2 + endif + if stridx(strpart(line, 0, col), ',') != -1 + " Handle multiple declarations on the same line in a function + " declaration. + let col2 = col - 1 + while line[col2] != ',' + let col2 -= 1 + endwhile + if strpart(line, col2 + 1, col - col2 - 1) =~ ' *[^ ][^ ]* *[^ ]' + let line = strpart(line, col2 + 1) + let col -= col2 + endif + endif + if len(items) == 1 + " Completing one word and it's a local variable: May add '[', '.' or + " '->'. + let match = items[0] + let kind = 'v' + if match(line, '\<' . match . '\s*\[') > 0 + let match .= '[' + else + let res = s:Nextitem(strpart(line, 0, col), [''], 0, 1) + if len(res) > 0 + " There are members, thus add "." or "->". + if match(line, '\*[ \t(]*' . match . '\>') > 0 + let match .= '->' + else + let match .= '.' + endif + endif + endif + let res = [{'match': match, 'tagline' : '', 'kind' : kind, 'info' : line}] + elseif len(items) == arrays + 1 + " Completing one word and it's a local array variable: build tagline + " from declaration line + let match = items[0] + let kind = 'v' + let tagline = "\t/^" . line . '$/' + let res = [{'match': match, 'tagline' : tagline, 'kind' : kind, 'info' : line}] + else + " Completing "var.", "var.something", etc. + let res = s:Nextitem(strpart(line, 0, col), items[1:], 0, 1) + endif + endif + + if len(items) == 1 || len(items) == arrays + 1 + " Only one part, no "." or "->": complete from tags file. + if len(items) == 1 + let tags = taglist('^' . base) + else + let tags = taglist('^' . items[0] . '$') + endif + + " Remove members, these can't appear without something in front. + call filter(tags, 'has_key(v:val, "kind") ? v:val["kind"] != "m" : 1') + + " Remove static matches in other files. + call filter(tags, '!has_key(v:val, "static") || !v:val["static"] || bufnr("%") == bufnr(v:val["filename"])') + + call extend(res, map(tags, 's:Tag2item(v:val)')) + endif + + if len(res) == 0 + " Find the variable in the tags file(s) + let diclist = taglist('^' . items[0] . '$') + + " Remove members, these can't appear without something in front. + call filter(diclist, 'has_key(v:val, "kind") ? v:val["kind"] != "m" : 1') + + let res = [] + for i in range(len(diclist)) + " New ctags has the "typeref" field. Patched version has "typename". + if has_key(diclist[i], 'typename') + call extend(res, s:StructMembers(diclist[i]['typename'], items[1:], 1)) + elseif has_key(diclist[i], 'typeref') + call extend(res, s:StructMembers(diclist[i]['typeref'], items[1:], 1)) + endif + + " For a variable use the command, which must be a search pattern that + " shows the declaration of the variable. + if diclist[i]['kind'] == 'v' + let line = diclist[i]['cmd'] + if line[0] == '/' && line[1] == '^' + let col = match(line, '\<' . items[0] . '\>') + call extend(res, s:Nextitem(strpart(line, 2, col - 2), items[1:], 0, 1)) + endif + endif + endfor + endif + + if len(res) == 0 && searchdecl(items[0], 1) == 0 + " Found, now figure out the type. + " TODO: join previous line if it makes sense + let line = getline('.') + let col = col('.') + let res = s:Nextitem(strpart(line, 0, col), items[1:], 0, 1) + endif + + " If the last item(s) are [...] they need to be added to the matches. + let last = len(items) - 1 + let brackets = '' + while last >= 0 + if items[last][0] != '[' + break + endif + let brackets = items[last] . brackets + let last -= 1 + endwhile + + return map(res, 's:Tagline2item(v:val, brackets)') +endfunc + +function! s:GetAddition(line, match, memarg, bracket) + " Guess if the item is an array. + if a:bracket && match(a:line, a:match . '\s*\[') > 0 + return '[' + endif + + " Check if the item has members. + if len(s:SearchMembers(a:memarg, [''], 0)) > 0 + " If there is a '*' before the name use "->". + if match(a:line, '\*[ \t(]*' . a:match . '\>') > 0 + return '->' + else + return '.' + endif + endif + return '' +endfunction + +" Turn the tag info "val" into an item for completion. +" "val" is is an item in the list returned by taglist(). +" If it is a variable we may add "." or "->". Don't do it for other types, +" such as a typedef, by not including the info that s:GetAddition() uses. +function! s:Tag2item(val) + let res = {'match': a:val['name']} + + let res['extra'] = s:Tagcmd2extra(a:val['cmd'], a:val['name'], a:val['filename']) + + let s = s:Dict2info(a:val) + if s != '' + let res['info'] = s + endif + + let res['tagline'] = '' + if has_key(a:val, "kind") + let kind = a:val['kind'] + let res['kind'] = kind + if kind == 'v' + let res['tagline'] = "\t" . a:val['cmd'] + let res['dict'] = a:val + elseif kind == 'f' + let res['match'] = a:val['name'] . '(' + endif + endif + + return res +endfunction + +" Use all the items in dictionary for the "info" entry. +function! s:Dict2info(dict) + let info = '' + for k in sort(keys(a:dict)) + let info .= k . repeat(' ', 10 - len(k)) + if k == 'cmd' + let info .= substitute(matchstr(a:dict['cmd'], '/^\s*\zs.*\ze$/'), '\\\(.\)', '\1', 'g') + else + let info .= a:dict[k] + endif + let info .= "\n" + endfor + return info +endfunc + +" Parse a tag line and return a dictionary with items like taglist() +function! s:ParseTagline(line) + let l = split(a:line, "\t") + let d = {} + if len(l) >= 3 + let d['name'] = l[0] + let d['filename'] = l[1] + let d['cmd'] = l[2] + let n = 2 + if l[2] =~ '^/' + " Find end of cmd, it may contain Tabs. + while n < len(l) && l[n] !~ '/;"$' + let n += 1 + let d['cmd'] .= " " . l[n] + endwhile + endif + for i in range(n + 1, len(l) - 1) + if l[i] == 'file:' + let d['static'] = 1 + elseif l[i] !~ ':' + let d['kind'] = l[i] + else + let d[matchstr(l[i], '[^:]*')] = matchstr(l[i], ':\zs.*') + endif + endfor + endif + + return d +endfunction + +" Turn a match item "val" into an item for completion. +" "val['match']" is the matching item. +" "val['tagline']" is the tagline in which the last part was found. +function! s:Tagline2item(val, brackets) + let line = a:val['tagline'] + let add = s:GetAddition(line, a:val['match'], [a:val], a:brackets == '') + let res = {'word': a:val['match'] . a:brackets . add } + + if has_key(a:val, 'info') + " Use info from Tag2item(). + let res['info'] = a:val['info'] + else + " Parse the tag line and add each part to the "info" entry. + let s = s:Dict2info(s:ParseTagline(line)) + if s != '' + let res['info'] = s + endif + endif + + if has_key(a:val, 'kind') + let res['kind'] = a:val['kind'] + elseif add == '(' + let res['kind'] = 'f' + else + let s = matchstr(line, '\t\(kind:\)\=\zs\S\ze\(\t\|$\)') + if s != '' + let res['kind'] = s + endif + endif + + if has_key(a:val, 'extra') + let res['menu'] = a:val['extra'] + return res + endif + + " Isolate the command after the tag and filename. + let s = matchstr(line, '[^\t]*\t[^\t]*\t\zs\(/^.*$/\|[^\t]*\)\ze\(;"\t\|\t\|$\)') + if s != '' + let res['menu'] = s:Tagcmd2extra(s, a:val['match'], matchstr(line, '[^\t]*\t\zs[^\t]*\ze\t')) + endif + return res +endfunction + +" Turn a command from a tag line to something that is useful in the menu +function! s:Tagcmd2extra(cmd, name, fname) + if a:cmd =~ '^/^' + " The command is a search command, useful to see what it is. + let x = matchstr(a:cmd, '^/^\s*\zs.*\ze$/') + let x = substitute(x, '\<' . a:name . '\>', '@@', '') + let x = substitute(x, '\\\(.\)', '\1', 'g') + let x = x . ' - ' . a:fname + elseif a:cmd =~ '^\d*$' + " The command is a line number, the file name is more useful. + let x = a:fname . ' - ' . a:cmd + else + " Not recognized, use command and file name. + let x = a:cmd . ' - ' . a:fname + endif + return x +endfunction + +" Find composing type in "lead" and match items[0] with it. +" Repeat this recursively for items[1], if it's there. +" When resolving typedefs "depth" is used to avoid infinite recursion. +" Return the list of matches. +function! s:Nextitem(lead, items, depth, all) + + " Use the text up to the variable name and split it in tokens. + let tokens = split(a:lead, '\s\+\|\<') + + " Try to recognize the type of the variable. This is rough guessing... + let res = [] + for tidx in range(len(tokens)) + + " Skip tokens starting with a non-ID character. + if tokens[tidx] !~ '^\h' + continue + endif + + " Recognize "struct foobar" and "union foobar". + " Also do "class foobar" when it's C++ after all (doesn't work very well + " though). + if (tokens[tidx] == 'struct' || tokens[tidx] == 'union' || tokens[tidx] == 'class') && tidx + 1 < len(tokens) + let res = s:StructMembers(tokens[tidx] . ':' . tokens[tidx + 1], a:items, a:all) + break + endif + + " TODO: add more reserved words + if index(['int', 'short', 'char', 'float', 'double', 'static', 'unsigned', 'extern'], tokens[tidx]) >= 0 + continue + endif + + " Use the tags file to find out if this is a typedef. + let diclist = taglist('^' . tokens[tidx] . '$') + for tagidx in range(len(diclist)) + let item = diclist[tagidx] + + " New ctags has the "typeref" field. Patched version has "typename". + if has_key(item, 'typeref') + call extend(res, s:StructMembers(item['typeref'], a:items, a:all)) + continue + endif + if has_key(item, 'typename') + call extend(res, s:StructMembers(item['typename'], a:items, a:all)) + continue + endif + + " Only handle typedefs here. + if item['kind'] != 't' + continue + endif + + " Skip matches local to another file. + if has_key(item, 'static') && item['static'] && bufnr('%') != bufnr(item['filename']) + continue + endif + + " For old ctags we recognize "typedef struct aaa" and + " "typedef union bbb" in the tags file command. + let cmd = item['cmd'] + let ei = matchend(cmd, 'typedef\s\+') + if ei > 1 + let cmdtokens = split(strpart(cmd, ei), '\s\+\|\<') + if len(cmdtokens) > 1 + if cmdtokens[0] == 'struct' || cmdtokens[0] == 'union' || cmdtokens[0] == 'class' + let name = '' + " Use the first identifier after the "struct" or "union" + for ti in range(len(cmdtokens) - 1) + if cmdtokens[ti] =~ '^\w' + let name = cmdtokens[ti] + break + endif + endfor + if name != '' + call extend(res, s:StructMembers(cmdtokens[0] . ':' . name, a:items, a:all)) + endif + elseif a:depth < 10 + " Could be "typedef other_T some_T". + call extend(res, s:Nextitem(cmdtokens[0], a:items, a:depth + 1, a:all)) + endif + endif + endif + endfor + if len(res) > 0 + break + endif + endfor + + return res +endfunction + + +" Search for members of structure "typename" in tags files. +" Return a list with resulting matches. +" Each match is a dictionary with "match" and "tagline" entries. +" When "all" is non-zero find all, otherwise just return 1 if there is any +" member. +function! s:StructMembers(typename, items, all) + " Todo: What about local structures? + let fnames = join(map(tagfiles(), 'escape(v:val, " \\#%")')) + if fnames == '' + return [] + endif + + let typename = a:typename + let qflist = [] + let cached = 0 + if a:all == 0 + let n = '1' " stop at first found match + if has_key(s:grepCache, a:typename) + let qflist = s:grepCache[a:typename] + let cached = 1 + endif + else + let n = '' + endif + if !cached + while 1 + exe 'silent! keepj noautocmd ' . n . 'vimgrep /\t' . typename . '\(\t\|$\)/j ' . fnames + + let qflist = getqflist() + if len(qflist) > 0 || match(typename, "::") < 0 + break + endif + " No match for "struct:context::name", remove "context::" and try again. + let typename = substitute(typename, ':[^:]*::', ':', '') + endwhile + + if a:all == 0 + " Store the result to be able to use it again later. + let s:grepCache[a:typename] = qflist + endif + endif + + " Skip over [...] items + let idx = 0 + while 1 + if idx >= len(a:items) + let target = '' " No further items, matching all members + break + endif + if a:items[idx][0] != '[' + let target = a:items[idx] + break + endif + let idx += 1 + endwhile + " Put matching members in matches[]. + let matches = [] + for l in qflist + let memb = matchstr(l['text'], '[^\t]*') + if memb =~ '^' . target + " Skip matches local to another file. + if match(l['text'], "\tfile:") < 0 || bufnr('%') == bufnr(matchstr(l['text'], '\t\zs[^\t]*')) + let item = {'match': memb, 'tagline': l['text']} + + " Add the kind of item. + let s = matchstr(l['text'], '\t\(kind:\)\=\zs\S\ze\(\t\|$\)') + if s != '' + let item['kind'] = s + if s == 'f' + let item['match'] = memb . '(' + endif + endif + + call add(matches, item) + endif + endif + endfor + + if len(matches) > 0 + " Skip over next [...] items + let idx += 1 + while 1 + if idx >= len(a:items) + return matches " No further items, return the result. + endif + if a:items[idx][0] != '[' + break + endif + let idx += 1 + endwhile + + " More items following. For each of the possible members find the + " matching following members. + return s:SearchMembers(matches, a:items[idx :], a:all) + endif + + " Failed to find anything. + return [] +endfunction + +" For matching members, find matches for following items. +" When "all" is non-zero find all, otherwise just return 1 if there is any +" member. +function! s:SearchMembers(matches, items, all) + let res = [] + for i in range(len(a:matches)) + let typename = '' + if has_key(a:matches[i], 'dict') + if has_key(a:matches[i].dict, 'typename') + let typename = a:matches[i].dict['typename'] + elseif has_key(a:matches[i].dict, 'typeref') + let typename = a:matches[i].dict['typeref'] + endif + let line = "\t" . a:matches[i].dict['cmd'] + else + let line = a:matches[i]['tagline'] + let e = matchend(line, '\ttypename:') + if e < 0 + let e = matchend(line, '\ttyperef:') + endif + if e > 0 + " Use typename field + let typename = matchstr(line, '[^\t]*', e) + endif + endif + + if typename != '' + call extend(res, s:StructMembers(typename, a:items, a:all)) + else + " Use the search command (the declaration itself). + let s = match(line, '\t\zs/^') + if s > 0 + let e = match(line, '\<' . a:matches[i]['match'] . '\>', s) + if e > 0 + call extend(res, s:Nextitem(strpart(line, s, e - s), a:items, 0, a:all)) + endif + endif + endif + if a:all == 0 && len(res) > 0 + break + endif + endfor + return res +endfunc + +let &cpo = s:cpo_save +unlet s:cpo_save |