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Diffstat (limited to 'runtime/autoload/ccomplete.vim')
| -rw-r--r-- | runtime/autoload/ccomplete.vim | 693 |
1 files changed, 693 insertions, 0 deletions
diff --git a/runtime/autoload/ccomplete.vim b/runtime/autoload/ccomplete.vim new file mode 100644 index 0000000..3bddba7 --- /dev/null +++ b/runtime/autoload/ccomplete.vim @@ -0,0 +1,693 @@ +vim9script noclear + +# Vim completion script +# Language: C +# Maintainer: Bram Moolenaar <Bram@vim.org> +# Rewritten in Vim9 script by github user lacygoill +# Last Change: 2022 Jan 31 + +var prepended: string +var grepCache: dict<list<dict<any>>> + +# This function is used for the 'omnifunc' option. +export def Complete(findstart: bool, abase: string): any # {{{1 + if findstart + # Locate the start of the item, including ".", "->" and "[...]". + var line: string = getline('.') + var start: number = charcol('.') - 1 + var lastword: number = -1 + while start > 0 + if line[start - 1] =~ '\w' + --start + elseif line[start - 1] =~ '\.' + if lastword == -1 + lastword = start + endif + --start + elseif start > 1 && line[start - 2] == '-' + && line[start - 1] == '>' + if lastword == -1 + lastword = start + endif + start -= 2 + elseif line[start - 1] == ']' + # Skip over [...]. + var n: number = 0 + --start + while start > 0 + --start + if line[start] == '[' + if n == 0 + break + endif + --n + elseif line[start] == ']' # nested [] + ++n + 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 prepended. + if lastword == -1 + prepended = '' + return byteidx(line, start) + endif + prepended = line[start : lastword - 1] + return byteidx(line, lastword) + endif + + # Return list of matches. + + var base: string = prepended .. abase + + # 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 + 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. + var items: list<string> + var s: number = 0 + var arrays: number = 0 + while 1 + var e: number = base->charidx(match(base, '\.\|->\|\[', s)) + if e < 0 + if s == 0 || base[s - 1] != ']' + items->add(base[s :]) + endif + break + endif + if s == 0 || base[s - 1] != ']' + items->add(base[s : e - 1]) + endif + if base[e] == '.' + # skip over '.' + s = e + 1 + elseif base[e] == '-' + # skip over '->' + s = e + 2 + else + # Skip over [...]. + var n: number = 0 + s = e + ++e + while e < strcharlen(base) + if base[e] == ']' + if n == 0 + break + endif + --n + elseif base[e] == '[' # nested [...] + ++n + endif + ++e + endwhile + ++e + items->add(base[s : e - 1]) + ++arrays + 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") + var res: list<dict<any>> + if items[0]->searchdecl(false, true) == 0 + # Found, now figure out the type. + # TODO: join previous line if it makes sense + var line: string = getline('.') + var col: number = charcol('.') + if line[: col - 1]->stridx(';') >= 0 + # Handle multiple declarations on the same line. + var col2: number = col - 1 + while line[col2] != ';' + --col2 + endwhile + line = line[col2 + 1 :] + col -= col2 + endif + if line[: col - 1]->stridx(',') >= 0 + # Handle multiple declarations on the same line in a function + # declaration. + var col2: number = col - 1 + while line[col2] != ',' + --col2 + endwhile + if line[col2 + 1 : col - 1] =~ ' *[^ ][^ ]* *[^ ]' + line = line[col2 + 1 :] + col -= col2 + endif + endif + if len(items) == 1 + # Completing one word and it's a local variable: May add '[', '.' or + # '->'. + var match: string = items[0] + var kind: string = 'v' + if match(line, '\<' .. match .. '\s*\[') > 0 + match ..= '[' + else + res = line[: col - 1]->Nextitem([''], 0, true) + if len(res) > 0 + # There are members, thus add "." or "->". + if match(line, '\*[ \t(]*' .. match .. '\>') > 0 + match ..= '->' + else + match ..= '.' + endif + endif + endif + 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 + var match: string = items[0] + var kind: string = 'v' + var tagline: string = "\t/^" .. line .. '$/' + res = [{match: match, tagline: tagline, kind: kind, info: line}] + else + # Completing "var.", "var.something", etc. + res = line[: col - 1]->Nextitem(items[1 :], 0, true) + endif + endif + + if len(items) == 1 || len(items) == arrays + 1 + # Only one part, no "." or "->": complete from tags file. + var tags: list<dict<any>> + if len(items) == 1 + tags = taglist('^' .. base) + else + tags = taglist('^' .. items[0] .. '$') + endif + + tags + # Remove members, these can't appear without something in front. + ->filter((_, v: dict<any>): bool => + v->has_key('kind') ? v.kind != 'm' : true) + # Remove static matches in other files. + ->filter((_, v: dict<any>): bool => + !v->has_key('static') + || !v['static'] + || bufnr('%') == bufnr(v['filename'])) + + res = res->extend(tags->map((_, v: dict<any>) => Tag2item(v))) + endif + + if len(res) == 0 + # Find the variable in the tags file(s) + var diclist: list<dict<any>> = taglist('^' .. items[0] .. '$') + # Remove members, these can't appear without something in front. + ->filter((_, v: dict<string>): bool => + v->has_key('kind') ? v.kind != 'm' : true) + + res = [] + for i: number in len(diclist)->range() + # New ctags has the "typeref" field. Patched version has "typename". + if diclist[i]->has_key('typename') + res = res->extend(diclist[i]['typename']->StructMembers(items[1 :], true)) + elseif diclist[i]->has_key('typeref') + res = res->extend(diclist[i]['typeref']->StructMembers(items[1 :], true)) + 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' + var line: string = diclist[i]['cmd'] + if line[: 1] == '/^' + var col: number = line->charidx(match(line, '\<' .. items[0] .. '\>')) + res = res->extend(line[2 : col - 1]->Nextitem(items[1 :], 0, true)) + endif + endif + endfor + endif + + if len(res) == 0 && items[0]->searchdecl(true) == 0 + # Found, now figure out the type. + # TODO: join previous line if it makes sense + var line: string = getline('.') + var col: number = charcol('.') + res = line[: col - 1]->Nextitem(items[1 :], 0, true) + endif + + # If the last item(s) are [...] they need to be added to the matches. + var last: number = len(items) - 1 + var brackets: string = '' + while last >= 0 + if items[last][0] != '[' + break + endif + brackets = items[last] .. brackets + --last + endwhile + + return res->map((_, v: dict<any>): dict<string> => Tagline2item(v, brackets)) +enddef + +def GetAddition( # {{{1 + line: string, + match: string, + memarg: list<dict<any>>, + bracket: bool): string + # Guess if the item is an array. + if bracket && match(line, match .. '\s*\[') > 0 + return '[' + endif + + # Check if the item has members. + if SearchMembers(memarg, [''], false)->len() > 0 + # If there is a '*' before the name use "->". + if match(line, '\*[ \t(]*' .. match .. '\>') > 0 + return '->' + else + return '.' + endif + endif + return '' +enddef + +def Tag2item(val: dict<any>): dict<any> # {{{1 +# 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 GetAddition() uses. + var res: dict<any> = {match: val['name']} + + res['extra'] = Tagcmd2extra(val['cmd'], val['name'], val['filename']) + + var s: string = Dict2info(val) + if s != '' + res['info'] = s + endif + + res['tagline'] = '' + if val->has_key('kind') + var kind: string = val['kind'] + res['kind'] = kind + if kind == 'v' + res['tagline'] = "\t" .. val['cmd'] + res['dict'] = val + elseif kind == 'f' + res['match'] = val['name'] .. '(' + endif + endif + + return res +enddef + +def Dict2info(dict: dict<any>): string # {{{1 +# Use all the items in dictionary for the "info" entry. + var info: string = '' + for k: string in dict->keys()->sort() + info ..= k .. repeat(' ', 10 - strlen(k)) + if k == 'cmd' + info ..= dict['cmd'] + ->matchstr('/^\s*\zs.*\ze$/') + ->substitute('\\\(.\)', '\1', 'g') + else + var dictk: any = dict[k] + if typename(dictk) != 'string' + info ..= dictk->string() + else + info ..= dictk + endif + endif + info ..= "\n" + endfor + return info +enddef + +def ParseTagline(line: string): dict<any> # {{{1 +# Parse a tag line and return a dictionary with items like taglist() + var l: list<string> = split(line, "\t") + var d: dict<any> + if len(l) >= 3 + d['name'] = l[0] + d['filename'] = l[1] + d['cmd'] = l[2] + var n: number = 2 + if l[2] =~ '^/' + # Find end of cmd, it may contain Tabs. + while n < len(l) && l[n] !~ '/;"$' + ++n + d['cmd'] ..= ' ' .. l[n] + endwhile + endif + for i: number in range(n + 1, len(l) - 1) + if l[i] == 'file:' + d['static'] = 1 + elseif l[i] !~ ':' + d['kind'] = l[i] + else + d[l[i]->matchstr('[^:]*')] = l[i]->matchstr(':\zs.*') + endif + endfor + endif + + return d +enddef + +def Tagline2item(val: dict<any>, brackets: string): dict<string> # {{{1 +# 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. + var line: string = val['tagline'] + var add: string = GetAddition(line, val['match'], [val], brackets == '') + var res: dict<string> = {word: val['match'] .. brackets .. add} + + if val->has_key('info') + # Use info from Tag2item(). + res['info'] = val['info'] + else + # Parse the tag line and add each part to the "info" entry. + var s: string = ParseTagline(line)->Dict2info() + if s != '' + res['info'] = s + endif + endif + + if val->has_key('kind') + res['kind'] = val['kind'] + elseif add == '(' + res['kind'] = 'f' + else + var s: string = line->matchstr('\t\(kind:\)\=\zs\S\ze\(\t\|$\)') + if s != '' + res['kind'] = s + endif + endif + + if val->has_key('extra') + res['menu'] = val['extra'] + return res + endif + + # Isolate the command after the tag and filename. + var s: string = line->matchstr('[^\t]*\t[^\t]*\t\zs\(/^.*$/\|[^\t]*\)\ze\(;"\t\|\t\|$\)') + if s != '' + res['menu'] = s->Tagcmd2extra(val['match'], line->matchstr('[^\t]*\t\zs[^\t]*\ze\t')) + endif + return res +enddef + +def Tagcmd2extra( # {{{1 + cmd: string, + name: string, + fname: string): string +# Turn a command from a tag line to something that is useful in the menu + var x: string + if cmd =~ '^/^' + # The command is a search command, useful to see what it is. + x = cmd + ->matchstr('^/^\s*\zs.*\ze$/') + ->substitute('\<' .. name .. '\>', '@@', '') + ->substitute('\\\(.\)', '\1', 'g') + .. ' - ' .. fname + elseif cmd =~ '^\d*$' + # The command is a line number, the file name is more useful. + x = fname .. ' - ' .. cmd + else + # Not recognized, use command and file name. + x = cmd .. ' - ' .. fname + endif + return x +enddef + +def Nextitem( # {{{1 + lead: string, + items: list<string>, + depth: number, + all: bool): list<dict<string>> +# Find composing type in "lead" and match items[0] with it. +# Repeat this recursively for items[1], if it's there. +# When resolving typedefs "depth" is used to avoid infinite recursion. +# Return the list of matches. + + # Use the text up to the variable name and split it in tokens. + var tokens: list<string> = split(lead, '\s\+\|\<') + + # Try to recognize the type of the variable. This is rough guessing... + var res: list<dict<string>> + for tidx: number in len(tokens)->range() + + # Skip tokens starting with a non-ID character. + if tokens[tidx] !~ '^\h' + continue + endif + + # Recognize "struct foobar" and "union foobar". + # Also do "class foobar" when it's C++ after all (doesn't work very well + # though). + if (tokens[tidx] == 'struct' + || tokens[tidx] == 'union' + || tokens[tidx] == 'class') + && tidx + 1 < len(tokens) + res = StructMembers(tokens[tidx] .. ':' .. tokens[tidx + 1], items, all) + break + endif + + # TODO: add more reserved words + if ['int', 'short', 'char', 'float', + 'double', 'static', 'unsigned', 'extern']->index(tokens[tidx]) >= 0 + continue + endif + + # Use the tags file to find out if this is a typedef. + var diclist: list<dict<any>> = taglist('^' .. tokens[tidx] .. '$') + for tagidx: number in len(diclist)->range() + var item: dict<any> = diclist[tagidx] + + # New ctags has the "typeref" field. Patched version has "typename". + if item->has_key('typeref') + res = res->extend(item['typeref']->StructMembers(items, all)) + continue + endif + if item->has_key('typename') + res = res->extend(item['typename']->StructMembers(items, all)) + continue + endif + + # Only handle typedefs here. + if item['kind'] != 't' + continue + endif + + # Skip matches local to another file. + if item->has_key('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. + var cmd: string = item['cmd'] + var ei: number = cmd->charidx(matchend(cmd, 'typedef\s\+')) + if ei > 1 + var cmdtokens: list<string> = cmd[ei :]->split('\s\+\|\<') + if len(cmdtokens) > 1 + if cmdtokens[0] == 'struct' + || cmdtokens[0] == 'union' + || cmdtokens[0] == 'class' + var name: string = '' + # Use the first identifier after the "struct" or "union" + for ti: number in (len(cmdtokens) - 1)->range() + if cmdtokens[ti] =~ '^\w' + name = cmdtokens[ti] + break + endif + endfor + if name != '' + res = res->extend(StructMembers(cmdtokens[0] .. ':' .. name, items, all)) + endif + elseif depth < 10 + # Could be "typedef other_T some_T". + res = res->extend(cmdtokens[0]->Nextitem(items, depth + 1, all)) + endif + endif + endif + endfor + if len(res) > 0 + break + endif + endfor + + return res +enddef + +def StructMembers( # {{{1 + atypename: string, + items: list<string>, + all: bool): list<dict<string>> + +# 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 true find all, otherwise just return 1 if there is any member. + + # Todo: What about local structures? + var fnames: string = tagfiles() + ->map((_, v: string) => escape(v, ' \#%')) + ->join() + if fnames == '' + return [] + endif + + var typename: string = atypename + var qflist: list<dict<any>> + var cached: number = 0 + var n: string + if !all + n = '1' # stop at first found match + if grepCache->has_key(typename) + qflist = grepCache[typename] + cached = 1 + endif + else + n = '' + endif + if !cached + while 1 + execute 'silent! keepjumps noautocmd ' + .. n .. 'vimgrep ' .. '/\t' .. typename .. '\(\t\|$\)/j ' + .. fnames + + qflist = getqflist() + if len(qflist) > 0 || match(typename, '::') < 0 + break + endif + # No match for "struct:context::name", remove "context::" and try again. + typename = typename->substitute(':[^:]*::', ':', '') + endwhile + + if !all + # Store the result to be able to use it again later. + grepCache[typename] = qflist + endif + endif + + # Skip over [...] items + var idx: number = 0 + var target: string + while 1 + if idx >= len(items) + target = '' # No further items, matching all members + break + endif + if items[idx][0] != '[' + target = items[idx] + break + endif + ++idx + endwhile + # Put matching members in matches[]. + var matches: list<dict<string>> + for l: dict<any> in qflist + var memb: string = l['text']->matchstr('[^\t]*') + if memb =~ '^' .. target + # Skip matches local to another file. + if match(l['text'], "\tfile:") < 0 + || bufnr('%') == l['text']->matchstr('\t\zs[^\t]*')->bufnr() + var item: dict<string> = {match: memb, tagline: l['text']} + + # Add the kind of item. + var s: string = l['text']->matchstr('\t\(kind:\)\=\zs\S\ze\(\t\|$\)') + if s != '' + item['kind'] = s + if s == 'f' + item['match'] = memb .. '(' + endif + endif + + matches->add(item) + endif + endif + endfor + + if len(matches) > 0 + # Skip over next [...] items + ++idx + while 1 + if idx >= len(items) + return matches # No further items, return the result. + endif + if items[idx][0] != '[' + break + endif + ++idx + endwhile + + # More items following. For each of the possible members find the + # matching following members. + return SearchMembers(matches, items[idx :], all) + endif + + # Failed to find anything. + return [] +enddef + +def SearchMembers( # {{{1 + matches: list<dict<any>>, + items: list<string>, + all: bool): list<dict<string>> + +# For matching members, find matches for following items. +# When "all" is true find all, otherwise just return 1 if there is any member. + var res: list<dict<string>> + for i: number in len(matches)->range() + var typename: string = '' + var line: string + if matches[i]->has_key('dict') + if matches[i]['dict']->has_key('typename') + typename = matches[i]['dict']['typename'] + elseif matches[i]['dict']->has_key('typeref') + typename = matches[i]['dict']['typeref'] + endif + line = "\t" .. matches[i]['dict']['cmd'] + else + line = matches[i]['tagline'] + var eb: number = matchend(line, '\ttypename:') + var e: number = charidx(line, eb) + if e < 0 + eb = matchend(line, '\ttyperef:') + e = charidx(line, eb) + endif + if e > 0 + # Use typename field + typename = line->matchstr('[^\t]*', eb) + endif + endif + + if typename != '' + res = res->extend(StructMembers(typename, items, all)) + else + # Use the search command (the declaration itself). + var sb: number = line->match('\t\zs/^') + var s: number = charidx(line, sb) + if s > 0 + var e: number = line + ->charidx(match(line, '\<' .. matches[i]['match'] .. '\>', sb)) + if e > 0 + res = res->extend(line[s : e - 1]->Nextitem(items, 0, all)) + endif + endif + endif + if !all && len(res) > 0 + break + endif + endfor + return res +enddef +#}}}1 + +# vim: noet sw=2 sts=2 |