197 lines
6.5 KiB
VimL
197 lines
6.5 KiB
VimL
" Vim plugin for Racer
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" (by Phil Dawes)
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"
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" 1. Edit the variables below (or override in .vimrc)
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" 2. copy this file into .vim/plugin/
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" 3. - now in insert mode do 'C-x C-o' to autocomplete the thing at the cursor
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" - in normal mode do 'gd' to go to definition
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" - 'gD' goes to the definition in a new vertical split
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"
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" (This plugin is best used with the 'hidden' option enabled so that switching buffers doesn't force you to save)
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if exists('g:loaded_racer')
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finish
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endif
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let g:loaded_racer = 1
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let s:save_cpo = &cpo
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set cpo&vim
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if !exists('g:racer_cmd')
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let path = escape(expand('<sfile>:p:h'), '\') . '/../target/release/'
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if isdirectory(path)
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let s:pathsep = has("win32") ? ';' : ':'
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let $PATH .= s:pathsep . path
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endif
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let g:racer_cmd = 'racer'
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if !(executable(g:racer_cmd))
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echohl WarningMsg | echomsg "No racer executable found in $PATH (" . $PATH . ")"
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endif
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endif
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if !exists('$RUST_SRC_PATH')
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let s:rust_src_default = 1
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if isdirectory("/usr/local/src/rust/src")
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let $RUST_SRC_PATH="/usr/local/src/rust/src"
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endif
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if isdirectory("/usr/src/rust/src")
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let $RUST_SRC_PATH="/usr/src/rust/src"
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endif
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if isdirectory("C:\\rust\\src")
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let $RUST_SRC_PATH="C:\\rust\\src"
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endif
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endif
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if !isdirectory($RUST_SRC_PATH)
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if exists('s:rust_src_default')
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echohl WarningMsg | echomsg "No RUST_SRC_PATH environment variable present, nor could default installation be found at: " . $RUST_SRC_PATH
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else
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echohl WarningMsg | echomsg "No directory was found at provided RUST_SRC_PATH: " . $RUST_SRC_PATH
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endif
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endif
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if !exists('g:racer_experimental_completer')
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let g:racer_experimental_completer = 0
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endif
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if !exists('g:racer_insert_paren')
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let g:racer_insert_paren = 1
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endif
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function! RacerGetPrefixCol(base)
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let col = col(".")-1
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let b:racer_col = col
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let b:tmpfname = tempname()
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call writefile(RacerGetBufferContents(a:base), b:tmpfname)
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let cmd = g:racer_cmd." prefix ".line(".")." ".col." ".b:tmpfname
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let res = system(cmd)
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let prefixline = split(res, "\\n")[0]
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let startcol = split(prefixline[7:], ",")[0]
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return startcol
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endfunction
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function! RacerGetExpCompletions(base)
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let col = strlen(getline('.')) + strlen(a:base) " use the column from the previous RacerGetPrefixCol() call, since vim ammends it afterwards
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call writefile(RacerGetBufferContents(a:base), b:tmpfname)
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let fname = expand("%:p")
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let cmd = g:racer_cmd." complete ".line(".")." ".col." ".fname." ".b:tmpfname
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let res = system(cmd)
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let typeMap = {
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\ 'Struct' : 's', 'Module' : 'M', 'Function' : 'f',
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\ 'Crate' : 'C', 'Let' : 'v', 'StructField' : 'm',
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\ 'Impl' : 'i', 'Enum' : 'e', 'EnumVariant' : 'E',
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\ 'Type' : 't', 'FnArg' : 'v', 'Trait' : 'T'
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\ }
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let lines = split(res, "\\n")
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let out = []
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for line in lines
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if line =~ "^MATCH"
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let completions = split(line[6:], ",")
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let kind = get(typeMap, completions[4])
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let completion = {'kind' : kind, 'word' : completions[0], 'dup':1 }
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if kind ==# 'f' " function
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let completion['menu'] = substitute(substitute(substitute(join(completions[5:], ','), '\(pub\|fn\) ',"","g"), '{*$', "", ""), ' where\s\?.*$', "", "")
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if g:racer_insert_paren == 1
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let completion['abbr'] = completions[0]
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let completion['word'] .= "("
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endif
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let completion['info'] = join(completions[5:], ',')
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elseif kind ==# 's' " struct
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let completion['menu'] = substitute(substitute(join(completions[5:], ','), '\(pub\|struct\) ',"","g"), '{*$', "", "")
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endif
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let out = add(out, completion)
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endif
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endfor
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call delete(b:tmpfname)
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return out
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endfunction
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function! RacerGetCompletions(base)
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let col = strlen(getline('.')) + strlen(a:base) " use the column from the previous RacerGetPrefixCol() call, since vim ammends it afterwards
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call writefile(RacerGetBufferContents(a:base), b:tmpfname)
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let fname = expand("%:p")
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let cmd = g:racer_cmd." complete ".line(".")." ".col." ".fname." ".b:tmpfname
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let res = system(cmd)
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let lines = split(res, "\\n")
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let out = []
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for line in lines
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if line =~ "^MATCH"
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let completion = split(line[6:], ",")[0]
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let out = add(out, completion)
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endif
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endfor
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call delete(b:tmpfname)
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return out
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endfunction
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function! RacerGoToDefinition()
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let col = col(".")-1
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let b:racer_col = col
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let fname = expand("%:p")
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let tmpfname = tempname()
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call writefile(getline(1, '$'), tmpfname)
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let cmd = g:racer_cmd." find-definition ".line(".")." ".col." ".fname." ".tmpfname
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let res = system(cmd)
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let lines = split(res, "\\n")
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for line in lines
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if line =~ "^MATCH"
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let linenum = split(line[6:], ",")[1]
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let colnum = split(line[6:], ",")[2]
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let fname = split(line[6:], ",")[3]
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call RacerJumpToLocation(fname, linenum, colnum)
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break
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endif
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endfor
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call delete(tmpfname)
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endfunction
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function! RacerGetBufferContents(base)
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" Re-combine the completion base word from omnicomplete with the current
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" line contents. Since the base word gets remove from the buffer before
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" this function is invoked we have to put it back in to out tmpfile.
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let col = col(".")-1
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let buf_lines = getline(1, '$')
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let line_contents = getline('.')
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let buf_lines[line('.') - 1] = strpart(line_contents, 0, col).a:base.strpart(line_contents, col, len(line_contents))
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return buf_lines
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endfunction
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function! RacerJumpToLocation(filename, linenum, colnum)
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if(a:filename != '')
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" Record jump mark
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normal! m`
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if a:filename != bufname('%')
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exec 'keepjumps e ' . fnameescape(a:filename)
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endif
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call cursor(a:linenum, a:colnum+1)
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" Center definition on screen
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normal! zz
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endif
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endfunction
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function! RacerComplete(findstart, base)
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if a:findstart
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return RacerGetPrefixCol(a:base)
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else
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if g:racer_experimental_completer == 1
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return RacerGetExpCompletions(a:base)
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else
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return RacerGetCompletions(a:base)
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endif
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endif
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endfunction
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autocmd FileType rust setlocal omnifunc=RacerComplete
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autocmd FileType rust nnoremap <buffer>gd :call RacerGoToDefinition()<cr>
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autocmd FileType rust nnoremap <buffer>gD :vsplit<cr>:call RacerGoToDefinition()<cr>
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let &cpo = s:save_cpo
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unlet s:save_cpo
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