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