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// Copyright (C) 2011, 2012 Google Inc.
//
// This file is part of YouCompleteMe.
//
// YouCompleteMe is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// YouCompleteMe is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with YouCompleteMe. If not, see <http://www.gnu.org/licenses/>.
#include "CompletionData.h"
#include "ClangUtils.h"
#include <boost/algorithm/string/erase.hpp>
#include <boost/move/move.hpp>
namespace {
char CursorKindToVimKind( CXCursorKind kind ) {
switch ( kind ) {
case CXCursor_StructDecl:
return 's';
case CXCursor_ClassDecl:
case CXCursor_ClassTemplate:
return 'c';
case CXCursor_EnumDecl:
return 'e';
case CXCursor_UnexposedDecl:
case CXCursor_UnionDecl:
case CXCursor_TypedefDecl:
return 't';
case CXCursor_FieldDecl:
return 'm';
case CXCursor_FunctionDecl:
case CXCursor_CXXMethod:
case CXCursor_FunctionTemplate:
case CXCursor_ConversionFunction:
case CXCursor_Constructor:
case CXCursor_Destructor:
return 'f';
case CXCursor_VarDecl:
return 'v';
case CXCursor_MacroDefinition:
return 'd';
case CXCursor_ParmDecl:
return 'p';
case CXCursor_Namespace:
case CXCursor_NamespaceAlias:
return 'n';
default:
return 'u'; // for 'unknown', 'unsupported'... whatever you like
}
}
bool IsMainCompletionTextInfo( CXCompletionChunkKind kind ) {
return
kind == CXCompletionChunk_Optional ||
kind == CXCompletionChunk_TypedText ||
kind == CXCompletionChunk_Placeholder ||
kind == CXCompletionChunk_LeftParen ||
kind == CXCompletionChunk_RightParen ||
kind == CXCompletionChunk_RightBracket ||
kind == CXCompletionChunk_LeftBracket ||
kind == CXCompletionChunk_LeftBrace ||
kind == CXCompletionChunk_RightBrace ||
kind == CXCompletionChunk_RightAngle ||
kind == CXCompletionChunk_LeftAngle ||
kind == CXCompletionChunk_Comma ||
kind == CXCompletionChunk_Colon ||
kind == CXCompletionChunk_SemiColon ||
kind == CXCompletionChunk_Equal ||
kind == CXCompletionChunk_Informative ||
kind == CXCompletionChunk_HorizontalSpace;
}
std::string ChunkToString( CXCompletionString completion_string,
uint chunk_num ) {
if ( !completion_string )
return std::string();
return YouCompleteMe::CXStringToString(
clang_getCompletionChunkText( completion_string, chunk_num ) );
}
std::string OptionalChunkToString( CXCompletionString completion_string,
uint chunk_num ) {
std::string final_string;
if ( !completion_string )
return final_string;
CXCompletionString optional_completion_string =
clang_getCompletionChunkCompletionString( completion_string, chunk_num );
if ( !optional_completion_string )
return final_string;
uint optional_num_chunks = clang_getNumCompletionChunks(
optional_completion_string );
for ( uint j = 0; j < optional_num_chunks; ++j ) {
CXCompletionChunkKind kind = clang_getCompletionChunkKind(
optional_completion_string, j );
if ( kind == CXCompletionChunk_Optional ) {
final_string.append( OptionalChunkToString( optional_completion_string,
j ) );
}
else {
final_string.append( ChunkToString( optional_completion_string, j ) );
}
}
return final_string;
}
// NOTE: this function accepts the text param by value on purpose; it internally
// needs a copy before processing the text so the copy might as well be made on
// the parameter BUT if this code is compiled in C++11 mode a move constructor
// can be called on the passed-in value. This is not possible if we accept the
// param by const ref.
std::string RemoveTwoConsecutiveUnderscores( std::string text ) {
boost::erase_all( text, "__" );
return text;
}
} // unnamed namespace
namespace YouCompleteMe {
CompletionData::CompletionData( const CXCompletionResult &completion_result ) {
CXCompletionString completion_string = completion_result.CompletionString;
if ( !completion_string )
return;
uint num_chunks = clang_getNumCompletionChunks( completion_string );
bool saw_left_paren = false;
bool saw_function_params = false;
for ( uint j = 0; j < num_chunks; ++j ) {
ExtractDataFromChunk( completion_string,
j,
saw_left_paren,
saw_function_params );
}
kind_ = CursorKindToVimKind( completion_result.CursorKind );
// We remove any two consecutive underscores from the function definition
// since identifiers with them are ugly, compiler-reserved names. Functions
// from the standard library use parameter names like "__pos" and we want to
// show them as just "pos". This will never interfere with client code since
// ANY C++ identifier with two consecutive underscores in it is
// compiler-reserved.
everything_except_return_type_ =
RemoveTwoConsecutiveUnderscores(
boost::move( everything_except_return_type_ ) );
detailed_info_.append( return_type_ )
.append( " " )
.append( everything_except_return_type_ )
.append( "\n" );
}
void CompletionData::ExtractDataFromChunk( CXCompletionString completion_string,
uint chunk_num,
bool &saw_left_paren,
bool &saw_function_params ) {
CXCompletionChunkKind kind = clang_getCompletionChunkKind(
completion_string, chunk_num );
if ( IsMainCompletionTextInfo( kind ) ) {
if ( kind == CXCompletionChunk_LeftParen ) {
saw_left_paren = true;
}
else if ( saw_left_paren &&
!saw_function_params &&
kind != CXCompletionChunk_RightParen &&
kind != CXCompletionChunk_Informative ) {
saw_function_params = true;
everything_except_return_type_.append( " " );
}
else if ( saw_function_params && kind == CXCompletionChunk_RightParen ) {
everything_except_return_type_.append( " " );
}
if ( kind == CXCompletionChunk_Optional ) {
everything_except_return_type_.append(
OptionalChunkToString( completion_string, chunk_num ) );
}
else {
everything_except_return_type_.append(
ChunkToString( completion_string, chunk_num ) );
}
}
if ( kind == CXCompletionChunk_ResultType )
return_type_ = ChunkToString( completion_string, chunk_num );
if ( kind == CXCompletionChunk_TypedText )
original_string_ = ChunkToString( completion_string, chunk_num );
}
} // namespace YouCompleteMe
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