forked from qt-creator/qt-creator
Clang: Rename directory ipcsource to source
Now it's in accordance with clangrefactoringbackend/source and clangpchmanagerbackend/source. Change-Id: I939cfc72cffb8fcde0649f125e6efb6670d1cbc3 Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
This commit is contained in:
Nikolai Kosjar
232
src/tools/clangbackend/source/codecompleter.cpp
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232
src/tools/clangbackend/source/codecompleter.cpp
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/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of Qt Creator.
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**
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 as published by the Free Software
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** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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****************************************************************************/
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#include "codecompleter.h"
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#include "clangfilepath.h"
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#include "clangcodecompleteresults.h"
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#include "clangstring.h"
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#include "cursor.h"
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#include "clangexceptions.h"
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#include "codecompletionsextractor.h"
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#include "sourcelocation.h"
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#include "unsavedfile.h"
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#include "unsavedfiles.h"
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#include "clangdocument.h"
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#include "sourcerange.h"
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#include "clangunsavedfilesshallowarguments.h"
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#include "clangtranslationunitupdater.h"
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#include <clang-c/Index.h>
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namespace ClangBackEnd {
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namespace {
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CodeCompletions toCodeCompletions(const ClangCodeCompleteResults &results)
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{
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if (results.isNull())
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return CodeCompletions();
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CodeCompletionsExtractor extractor(results.data());
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CodeCompletions codeCompletions = extractor.extractAll();
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return codeCompletions;
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}
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void filterUnknownContextResults(ClangCodeCompleteResults &results,
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const UnsavedFile &theUnsavedFile,
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uint line,
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uint column)
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{
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if (results.hasUnknownContext()) {
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bool positionIsOk = false;
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const uint position = theUnsavedFile.toUtf8Position(line, column - 1, &positionIsOk);
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if (positionIsOk && (theUnsavedFile.hasCharacterAt(position, '.')
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|| (theUnsavedFile.hasCharacterAt(position - 1, '-')
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&& theUnsavedFile.hasCharacterAt(position, '>')))) {
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results = {};
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}
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}
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}
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} // anonymous namespace
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CodeCompleter::CodeCompleter(const TranslationUnit &translationUnit,
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const UnsavedFiles &unsavedFiles)
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: translationUnit(translationUnit)
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, unsavedFiles(unsavedFiles)
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{
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}
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CodeCompletions CodeCompleter::complete(uint line, uint column,
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int funcNameStartLine,
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int funcNameStartColumn)
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{
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neededCorrection_ = CompletionCorrection::NoCorrection;
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// Check if we have a smart pointer completion and get proper constructor signatures in results.
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// Results are empty when it's not a smart pointer or this completion failed.
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ClangCodeCompleteResults results = completeSmartPointerCreation(line,
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column,
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funcNameStartLine,
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funcNameStartColumn);
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if (results.isNull() || results.isEmpty())
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results = completeHelper(line, column);
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filterUnknownContextResults(results, unsavedFile(), line, column);
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tryDotArrowCorrectionIfNoResults(results, line, column);
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return toCodeCompletions(results);
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}
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CompletionCorrection CodeCompleter::neededCorrection() const
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{
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return neededCorrection_;
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}
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// For given "make_unique<T>" / "make_shared<T>" / "QSharedPointer<T>::create" return "new T("
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// Otherwize return empty QString
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static QString tweakName(const QString &oldName)
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{
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QString fullName = oldName.trimmed();
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if (!fullName.contains('>'))
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return QString();
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if (!fullName.endsWith('>')) {
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// This is the class<type>::method case - remove ::method part
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if (!fullName.endsWith("create") || !fullName.contains("QSharedPointer"))
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return QString();
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fullName = fullName.mid(0, fullName.lastIndexOf(':') - 1);
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} else if (!fullName.contains("make_unique") && !fullName.contains("make_shared")) {
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return QString();
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}
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int templateStart = fullName.indexOf('<');
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QString name = fullName.mid(0, templateStart);
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QString templatePart = fullName.mid(templateStart + 1,
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fullName.length() - templateStart - 2);
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return "new " + templatePart + "(";
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}
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ClangCodeCompleteResults CodeCompleter::completeSmartPointerCreation(uint line,
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uint column,
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int funcNameStartLine,
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int funcNameStartColumn)
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{
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if (column <= 1 || funcNameStartLine == -1)
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return ClangCodeCompleteResults();
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UnsavedFile &file = unsavedFiles.unsavedFile(translationUnit.filePath());
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if (!file.hasCharacterAt(line, column - 1, '('))
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return ClangCodeCompleteResults();
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bool ok;
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const uint startPos = file.toUtf8Position(funcNameStartLine, funcNameStartColumn, &ok);
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const uint endPos = file.toUtf8Position(line, column - 1, &ok);
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Utf8String content = file.fileContent();
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const QString oldName = content.mid(startPos, endPos - startPos);
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const QString updatedName = tweakName(oldName);
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if (updatedName.isEmpty())
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return ClangCodeCompleteResults();
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column += updatedName.length();
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file.replaceAt(endPos + 1, 0, updatedName);
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ClangCodeCompleteResults results = completeHelper(line, column);
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if (results.isEmpty()) {
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column -= updatedName.length();
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file.replaceAt(endPos + 1, updatedName.length(), QString());
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}
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return results;
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}
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ClangCodeCompleteResults CodeCompleter::completeHelper(uint line, uint column)
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{
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const Utf8String nativeFilePath = FilePath::toNativeSeparators(translationUnit.filePath());
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UnsavedFilesShallowArguments unsaved = unsavedFiles.shallowArguments();
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return clang_codeCompleteAt(translationUnit.cxTranslationUnit(),
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nativeFilePath.constData(),
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line,
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column,
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unsaved.data(),
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unsaved.count(),
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defaultOptions());
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}
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uint CodeCompleter::defaultOptions() const
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{
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uint options = CXCodeComplete_IncludeMacros
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| CXCodeComplete_IncludeCodePatterns;
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if (TranslationUnitUpdater::defaultParseOptions()
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& CXTranslationUnit_IncludeBriefCommentsInCodeCompletion) {
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options |= CXCodeComplete_IncludeBriefComments;
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}
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return options;
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}
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UnsavedFile &CodeCompleter::unsavedFile()
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{
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return unsavedFiles.unsavedFile(translationUnit.filePath());
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}
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void CodeCompleter::tryDotArrowCorrectionIfNoResults(ClangCodeCompleteResults &results,
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uint line,
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uint column)
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{
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if (results.hasNoResultsForDotCompletion()) {
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const UnsavedFile &theUnsavedFile = unsavedFile();
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bool positionIsOk = false;
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const uint dotPosition = theUnsavedFile.toUtf8Position(line, column - 1, &positionIsOk);
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if (positionIsOk && theUnsavedFile.hasCharacterAt(dotPosition, '.'))
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results = completeWithArrowInsteadOfDot(line, column, dotPosition);
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}
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}
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ClangCodeCompleteResults CodeCompleter::completeWithArrowInsteadOfDot(uint line,
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uint column,
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uint dotPosition)
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{
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ClangCodeCompleteResults results;
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const bool replaced = unsavedFile().replaceAt(dotPosition,
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1,
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Utf8StringLiteral("->"));
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if (replaced) {
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results = completeHelper(line, column + 1);
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if (results.hasResults())
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neededCorrection_ = CompletionCorrection::DotToArrowCorrection;
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filterUnknownContextResults(results, unsavedFile(), line, column+1);
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}
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return results;
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}
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} // namespace ClangBackEnd
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