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Move cursor to start column before calling again omnifunc

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Vim internally moves the cursor to the start column before calling again the
omnifunc. Some omnifuncs like the one defined by the LanguageClient-neovim
plugin depend on this behavior to compute the list of candidates.
This commit is contained in:
micbou 2018-08-09 14:42:12 +02:00
parent 15362d9cb8
commit dca5682e21
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GPG Key ID: C7E8FD1F3BDA1E05
2 changed files with 47 additions and 5 deletions
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17
python/ycm/omni_completer.py
View File

@ -79,17 +79,18 @@ class OmniCompleter( Completer ):
return []
try:
return_value = vimsupport.GetIntValue( self._omnifunc + '(1,"")' )
if return_value < 0:
# FIXME: Technically, if the return is -1 we should raise an error
start_column = vimsupport.GetIntValue( self._omnifunc + '(1,"")' )
if start_column < 0:
# FIXME: Technically, if the returned value is -1 we should raise an
# error.
return []
# Use the start column calculated by the omnifunc, rather than our own
# interpretation. This is important for certain languages where our
# identifier detection is either incorrect or not compatible with the
# behaviour of the omnifunc. Note: do this before calling the omnifunc
# because it affects the value returned by 'query'
request_data[ 'start_column' ] = return_value + 1
# because it affects the value returned by 'query'.
request_data[ 'start_column' ] = start_column + 1
# Calling directly the omnifunc may move the cursor position. This is the
# case with the default Vim omnifunc for C-family languages
@ -99,6 +100,12 @@ class OmniCompleter( Completer ):
# So, we restore the cursor position after calling the omnifunc.
line, column = vimsupport.CurrentLineAndColumn()
# Vim internally moves the cursor to the start column before calling again
# the omnifunc. Some omnifuncs like the one defined by the
# LanguageClient-neovim plugin depend on this behavior to compute the list
# of candidates.
vimsupport.SetCurrentLineAndColumn( line, start_column )
omnifunc_call = [ self._omnifunc,
"(0,'",
vimsupport.EscapeForVim( request_data[ 'query' ] ),

35
python/ycm/tests/omni_completer_test.py
View File

@ -649,6 +649,41 @@ def OmniCompleter_GetCompletions_RestoreCursorPositionAfterOmnifuncCall_test(
)
@YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 1,
'g:ycm_semantic_triggers': TRIGGERS } )
def OmniCompleter_GetCompletions_MoveCursorPositionAtStartColumn_test( ycm ):
# This omnifunc relies on the cursor being moved at the start column when
# called the second time like LanguageClient#complete from the
# LanguageClient-neovim plugin.
def Omnifunc( findstart, base ):
if findstart:
return 5
if vimsupport.CurrentColumn() == 5:
return [ 'length' ]
return []
current_buffer = VimBuffer( 'buffer',
contents = [ 'String test',
'',
'test.le' ],
filetype = FILETYPE,
omnifunc = Omnifunc )
with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 3, 7 ) ):
ycm.SendCompletionRequest()
assert_that(
vimsupport.CurrentLineAndColumn(),
contains( 2, 7 )
)
assert_that(
ycm.GetCompletionResponse(),
has_entries( {
'completions': ToBytesOnPY2( [ 'length' ] ),
'completion_start_column': 6
} )
)
@YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 0,
'g:ycm_semantic_triggers': TRIGGERS } )
def OmniCompleter_GetCompletions_NoCache_NoSemanticTrigger_test( ycm ):