241 lines
8.2 KiB
VimL
241 lines
8.2 KiB
VimL
" Copyright (C) 2011, 2012 Strahinja Val Markovic <val@markovic.io>
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"
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" This file is part of YouCompleteMe.
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"
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" YouCompleteMe is free software: you can redistribute it and/or modify
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" it under the terms of the GNU General Public License as published by
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" the Free Software Foundation, either version 3 of the License, or
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" (at your option) any later version.
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"
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" YouCompleteMe is distributed in the hope that it will be useful,
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" but WITHOUT ANY WARRANTY; without even the implied warranty of
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" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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" GNU General Public License for more details.
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"
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" You should have received a copy of the GNU General Public License
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" along with YouCompleteMe. If not, see <http://www.gnu.org/licenses/>.
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" This is basic vim plugin boilerplate
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let s:save_cpo = &cpo
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set cpo&vim
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" This needs to be called outside of a function
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let s:script_folder_path = escape( expand( '<sfile>:p:h' ), '\' )
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let s:searched_and_no_results_found = 0
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let s:should_use_clang = 0
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let s:completion_start_column = 0
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let g:ycm_min_num_of_chars_for_completion = 2
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" TODO: check for a non-broken version of Vim and stop executing (with an error
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" message) if the detected version is too old
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function! youcompleteme#Enable()
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augroup youcompleteme
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autocmd!
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autocmd CursorMovedI * call s:OnMovedI()
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" TODO: BufWinEnter/Leave?
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autocmd BufRead,BufEnter * call s:OnBufferVisit()
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autocmd CursorHold,CursorHoldI * call s:OnCursorHold()
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augroup END
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" We need menuone in completeopt, otherwise when there's only one candidate
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" for completion, the menu doesn't show up.
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set completeopt-=menu
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set completeopt+=menuone
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" This is unnecessary with our features. People use this option to insert
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" the common prefix of all the matches and then add more differentiating chars
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" so that they can select a more specific match. With our features, they
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" don't need to insert the prefix; they just type the differentiating chars.
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" Also, having this option set breaks the plugin.
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set completeopt-=longest
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" We need this in spite of binding SetCompleteFunc to bufread and bufenter
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" because neither event is called when vim is started and the cursor is placed
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" in the file that was previously open (with for instance the session.vim
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" plugin)
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call s:SetCompleteFunc()
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" With this command, when the completion window is visible, the tab key will
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" select the next candidate in the window. In vim, this also changes the
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" typed-in text to that of the candidate completion.
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inoremap <expr><TAB> pumvisible() ? "\<C-n>" : "\<TAB>"
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py import vim
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exe 'python sys.path = sys.path + ["' . s:script_folder_path . '/../python"]'
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py import ycm
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py csystem = ycm.CompletionSystem()
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py clangcomp = ycm.ClangComplete()
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endfunction
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function! s:OnBufferVisit()
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call s:SetCompleteFunc()
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py csystem.AddBufferIdentifiers()
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endfunction
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function! s:OnCursorHold()
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py csystem.AddBufferIdentifiers()
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endfunction
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function! s:SetCompleteFunc()
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let &completefunc = 'youcompleteme#Complete'
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let &l:completefunc = 'youcompleteme#Complete'
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endfunction
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function! s:OnMovedI()
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" Technically, what we are doing here is not thread-safe. We are adding a new
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" identifier to the database while a background thread may be going through
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" that db, searching for matches for the previous query. BUT, we don't care
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" what junk that thread may get; those results don't matter anymore since
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" right after this function is called, we start a new candidate search with a
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" new query, and the old one is thrown away. The background thread never
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" modifies the db, only reads it.
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call s:AddIdentifierIfNeeded()
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call s:InvokeCompletion()
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endfunction
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function! s:AddIdentifierIfNeeded()
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py vim.command( "let should_add_identifier = " +
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\ str( int( ycm.ShouldAddIdentifier() ) ) )
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if should_add_identifier != 1
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return
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endif
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py csystem.AddPreviousIdentifier()
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endfunction
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function! s:InsideCommentOrString()
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" Has to be col('.') -1 because col('.') doesn't exist at this point. We are
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" in insert mode when this func is called.
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let syntax_group = synIDattr( synID( line( '.' ), col( '.' ) - 1, 1 ), 'name')
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if stridx(syntax_group, 'Comment') > -1 || stridx(syntax_group, 'String') > -1
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return 1
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endif
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return 0
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endfunction
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function! s:InvokeCompletion()
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if &completefunc != "youcompleteme#Complete"
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return
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endif
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if s:InsideCommentOrString()
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return
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endif
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" This is tricky. First, having 'refresh' set to 'always' in the dictionary
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" that our completion function returns makes sure that our completion function
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" is called on every keystroke when the completion menu is showing
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" (pumvisible() == true). So there's no point in invoking the completion menu
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" with our feedkeys call then.
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" Secondly, when the sequence of characters the user typed produces no
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" results in our search an infinite loop can occur. The problem is that our
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" feedkeys call triggers the OnCursorMovedI event which we are tied to.
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" So we solve this with the searched_and_no_results_found script-scope
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" variable that prevents this infinite loop from starting.
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if pumvisible() || s:searched_and_no_results_found
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let s:searched_and_no_results_found = 0
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return
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endif
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" <c-x><c-u> invokes the user's completion function (which we have set to
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" youcompleteme#Complete), and <c-p> tells Vim to select the previous
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" completion candidate. This is necessary because by default, Vim selects the
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" first candidate when completion is invoked, and selecting a candidate
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" automatically replaces the current text with it. Calling <c-p> forces Vim to
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" deselect the first candidate and in turn preserve the user's current text
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" until he explicitly chooses to replace it with a completion.
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call feedkeys( "\<C-X>\<C-U>\<C-P>", 'n' )
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endfunction
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function! s:IdentifierCompletion(query)
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if strlen( a:query ) < g:ycm_min_num_of_chars_for_completion
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return []
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endif
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py csystem.CandidatesForQueryAsync( vim.eval('a:query') )
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let l:results_ready = 0
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while !l:results_ready
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py << EOF
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results_ready = csystem.AsyncCandidateRequestReady()
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if results_ready:
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vim.command( 'let l:results_ready = 1' )
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EOF
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if complete_check()
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return { 'words' : [], 'refresh' : 'always'}
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endif
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endwhile
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let l:results = []
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py << EOF
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results = csystem.CandidatesFromStoredRequest()
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if results:
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vim.command( 'let l:results = ' + str( results ) )
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EOF
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let s:searched_and_no_results_found = len( l:results ) == 0
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" We need a very recent version of vim for this to work; otherwise, even
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" when we set refresh = always, vim won't call our completefunc on every
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" keystroke. The problem is still present in vim 7.3.390 but is fixed in
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" 7.3.475. It's possible that patch 404 was the one that fixed this issue,
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" but I haven't tested this assumption.
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" A bug in vim causes the '.' register to break when we use set this... sigh
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return { 'words' : l:results, 'refresh' : 'always' }
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endfunction
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function! s:ClangCompletion( query )
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py vim.command( 'let l:results = ' +
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\ str( clangcomp.CandidatesForQuery( vim.eval( 'a:query' ) ) ) )
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let s:searched_and_no_results_found = len( l:results ) == 0
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return { 'words' : l:results, 'refresh' : 'always' }
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endfunction
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" This is our main entry point. This is what vim calls to get completions.
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function! youcompleteme#Complete( findstart, base )
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if a:findstart
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py << EOF
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start_column = ycm.CompletionStartColumn()
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vim.command( 'let s:completion_start_column = ' + str( start_column ) )
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vim.command( 'let s:should_use_clang = ' +
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str( int( ycm.ShouldUseClang( start_column ) ) ) )
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EOF
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if ( s:should_use_clang )
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return s:completion_start_column
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else
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let l:current_column = col('.') - 1
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let l:query_length = current_column - s:completion_start_column
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if ( query_length < g:ycm_min_num_of_chars_for_completion )
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" for vim, -2 means not found but don't trigger an error message
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" see :h complete-functions
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return -2
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endif
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return s:completion_start_column
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endif
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else
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if ( s:should_use_clang )
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return s:ClangCompletion( a:base )
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else
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return s:IdentifierCompletion( a:base )
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endif
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endif
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endfunction
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" This is basic vim plugin boilerplate
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let &cpo = s:save_cpo
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unlet s:save_cpo
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