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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 "clangbackend_global.h"
#include "clangcodecompleteresults.h"
#include "clangdocument.h"
#include "clangexceptions.h"
#include "clangfilepath.h"
#include "clangstring.h"
#include "clangtranslationunitupdater.h"
#include "clangunsavedfilesshallowarguments.h"
#include "codecompletionsextractor.h"
#include "cursor.h"
#include "sourcelocation.h"
#include "sourcerange.h"
#include "unsavedfile.h"
#include "unsavedfiles.h"
#include <utils/qtcassert.h>
#include <clang-c/Index.h>
namespace ClangBackEnd {
namespace {
CodeCompletions toCodeCompletions(const UnsavedFile &unsavedFile,
const ClangCodeCompleteResults &results,
bool onlyFunctionOverloads)
{
if (results.isNull())
return CodeCompletions();
CodeCompletionsExtractor extractor(unsavedFile, results.data());
CodeCompletions codeCompletions = extractor.extractAll(onlyFunctionOverloads);
return codeCompletions;
}
// CLANG-UPGRADE-CHECK: Remove this workaround once we require LLVM/Clang 11 as that version makes
// the workaround pointless.
void filterUnknownContextResults(ClangCodeCompleteResults &results,
const UnsavedFile &theUnsavedFile,
uint line,
uint column)
{
if (results.hasUnknownContext()) {
bool positionIsOk = false;
const uint position = theUnsavedFile.toUtf8Position(line, column - 1, &positionIsOk);
if (positionIsOk && (theUnsavedFile.hasCharacterAt(position, '.')
|| (theUnsavedFile.hasCharacterAt(position - 1, '-')
&& theUnsavedFile.hasCharacterAt(position, '>')))) {
results = {};
}
}
}
} // anonymous namespace
CodeCompleter::CodeCompleter(const TranslationUnit &translationUnit,
const UnsavedFiles &unsavedFiles)
: translationUnit(translationUnit)
, unsavedFiles(unsavedFiles)
{
}
static void replaceWithOpeningParen(UnsavedFile &file, uint line, uint column)
{
bool ok;
const uint pos = file.toUtf8Position(line, column, &ok);
QTC_ASSERT(ok, return;);
file.replaceAt(pos, 1, Utf8String("(", 1));
}
CodeCompletions CodeCompleter::complete(int line, int column,
int funcNameStartLine,
int funcNameStartColumn)
{
if (funcNameStartLine >= 0) {
UnsavedFile &file = unsavedFiles.unsavedFile(translationUnit.filePath());
// Replace '{' by '(' to get proper FunctionOverloadCompletionKind for constructor.
if (file.hasCharacterAt(line, column - 1, '{'))
replaceWithOpeningParen(file, line, column - 1);
}
// Check if we have a smart pointer completion and get proper constructor signatures in results.
// Results are empty when it's not a smart pointer or this completion failed.
ClangCodeCompleteResults clangCompletions = completeSmartPointerCreation(line,
column,
funcNameStartLine,
funcNameStartColumn);
// Default completion.
if (clangCompletions.isNull() || clangCompletions.isEmpty())
clangCompletions = completeHelper(line, column);
filterUnknownContextResults(clangCompletions, unsavedFile(), line, column);
return toCodeCompletions(unsavedFiles.unsavedFile(translationUnit.filePath()),
clangCompletions,
funcNameStartLine >= 0);
}
// For given "make_unique<T>" / "make_shared<T>" / "QSharedPointer<T>::create" return "new T("
// Otherwize return empty QString
static QString tweakName(const Utf8String &oldName)
{
if (!oldName.contains('>'))
return QString();
QString fullName = oldName.toString().trimmed();
if (!fullName.endsWith('>')) {
// This is the class<type>::method case - remove ::method part
if (!fullName.endsWith("create") || !fullName.contains("QSharedPointer"))
return QString();
fullName = fullName.mid(0, fullName.lastIndexOf(':') - 1);
} else if (!fullName.contains("make_unique") && !fullName.contains("make_shared")) {
return QString();
}
int templateStart = fullName.indexOf('<');
QString templatePart = fullName.mid(templateStart + 1,
fullName.length() - templateStart - 2);
return "new " + templatePart + "(";
}
ClangCodeCompleteResults CodeCompleter::completeSmartPointerCreation(uint line,
uint column,
int funcNameStartLine,
int funcNameStartColumn)
{
if (column <= 1 || funcNameStartLine == -1)
return ClangCodeCompleteResults();
UnsavedFile &file = unsavedFiles.unsavedFile(translationUnit.filePath());
if (!file.hasCharacterAt(line, column - 1, '('))
return ClangCodeCompleteResults();
bool ok;
const uint startPos = file.toUtf8Position(funcNameStartLine, funcNameStartColumn, &ok);
QTC_ASSERT(ok, return ClangCodeCompleteResults(););
const uint endPos = file.toUtf8Position(line, column - 1, &ok);
QTC_ASSERT(ok, return ClangCodeCompleteResults(););
const Utf8String content = file.fileContent();
const Utf8String oldName = content.mid(startPos, endPos - startPos);
const QString updatedName = tweakName(oldName);
if (updatedName.isEmpty())
return ClangCodeCompleteResults();
column += updatedName.length();
file.replaceAt(endPos + 1, 0, updatedName);
ClangCodeCompleteResults results = completeHelper(line, column);
if (results.isEmpty()) {
column -= updatedName.length();
file.replaceAt(endPos + 1, updatedName.length(), QString());
}
return results;
}
ClangCodeCompleteResults CodeCompleter::completeHelper(uint line, uint column)
{
const Utf8String nativeFilePath = FilePath::toNativeSeparators(translationUnit.filePath());
UnsavedFilesShallowArguments unsaved = unsavedFiles.shallowArguments();
return clang_codeCompleteAt(translationUnit.cxTranslationUnit(),
nativeFilePath.constData(),
line,
column,
unsaved.data(),
unsaved.count(),
defaultOptions());
}
uint CodeCompleter::defaultOptions() const
{
uint options = CXCodeComplete_IncludeMacros
| CXCodeComplete_IncludeCompletionsWithFixIts
| CXCodeComplete_IncludeCodePatterns;
if (TranslationUnitUpdater::defaultParseOptions()
& CXTranslationUnit_IncludeBriefCommentsInCodeCompletion) {
options |= CXCodeComplete_IncludeBriefComments;
}
return options;
}
UnsavedFile &CodeCompleter::unsavedFile()
{
return unsavedFiles.unsavedFile(translationUnit.filePath());
}
} // namespace ClangBackEnd
|
