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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/
#include "codecompleter.h"
#include "clangfilepath.h"
#include "clangcodecompleteresults.h"
#include "clangstring.h"
#include "cursor.h"
#include "codecompletefailedexception.h"
#include "codecompletionsextractor.h"
#include "sourcelocation.h"
#include "unsavedfile.h"
#include "unsavedfiles.h"
#include "clangdocument.h"
#include "sourcerange.h"
#include "clangunsavedfilesshallowarguments.h"
#include "clangtranslationunitupdater.h"
#include <clang-c/Index.h>
namespace ClangBackEnd {
namespace {
CodeCompletions toCodeCompletions(const ClangCodeCompleteResults &results)
{
if (results.isNull())
return CodeCompletions();
CodeCompletionsExtractor extractor(results.data());
CodeCompletions codeCompletions = extractor.extractAll();
return codeCompletions;
}
} // anonymous namespace
CodeCompleter::CodeCompleter(const TranslationUnitCore &translationUnitCore,
const UnsavedFiles &unsavedFiles)
: translationUnitCore(translationUnitCore)
, unsavedFiles(unsavedFiles)
{
}
CodeCompletions CodeCompleter::complete(uint line, uint column)
{
neededCorrection_ = CompletionCorrection::NoCorrection;
ClangCodeCompleteResults results = completeHelper(line, column);
tryDotArrowCorrectionIfNoResults(results, line, column);
return toCodeCompletions(results);
}
CompletionCorrection CodeCompleter::neededCorrection() const
{
return neededCorrection_;
}
ClangCodeCompleteResults CodeCompleter::completeHelper(uint line, uint column)
{
const Utf8String nativeFilePath = FilePath::toNativeSeparators(translationUnitCore.filePath());
UnsavedFilesShallowArguments unsaved = unsavedFiles.shallowArguments();
return clang_codeCompleteAt(translationUnitCore.cxTranslationUnit(),
nativeFilePath.constData(),
line,
column,
unsaved.data(),
unsaved.count(),
defaultOptions());
}
uint CodeCompleter::defaultOptions() const
{
uint options = CXCodeComplete_IncludeMacros
| CXCodeComplete_IncludeCodePatterns;
if (TranslationUnitUpdater::defaultParseOptions()
& CXTranslationUnit_IncludeBriefCommentsInCodeCompletion) {
options |= CXCodeComplete_IncludeBriefComments;
}
return options;
}
UnsavedFile &CodeCompleter::unsavedFile()
{
return unsavedFiles.unsavedFile(translationUnitCore.filePath());
}
void CodeCompleter::tryDotArrowCorrectionIfNoResults(ClangCodeCompleteResults &results,
uint line,
uint column)
{
if (results.hasNoResultsForDotCompletion()) {
const UnsavedFile &theUnsavedFile = unsavedFile();
bool positionIsOk = false;
const uint dotPosition = theUnsavedFile.toUtf8Position(line, column - 1, &positionIsOk);
if (positionIsOk && theUnsavedFile.hasCharacterAt(dotPosition, '.'))
results = completeWithArrowInsteadOfDot(line, column, dotPosition);
}
}
ClangCodeCompleteResults CodeCompleter::completeWithArrowInsteadOfDot(uint line,
uint column,
uint dotPosition)
{
ClangCodeCompleteResults results;
const bool replaced = unsavedFile().replaceAt(dotPosition,
1,
Utf8StringLiteral("->"));
if (replaced) {
results = completeHelper(line, column + 1);
if (results.hasResults())
neededCorrection_ = CompletionCorrection::DotToArrowCorrection;
}
return results;
}
} // namespace ClangBackEnd
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