Clang: Rename CodeModelBackEnd in ClangBackEnd

Change-Id: I13e8a458634110456375956d4d4da7239c86957f
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

src/tools/clangbackend/ipcsource/translationunit.cpp

@@ -0,0 +1,230 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://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 http://www.qt.io/terms-conditions.  For further information
+** use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file.  Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, The Qt Company gives you certain additional
+** rights.  These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#include "translationunit.h"
+
+#include <QFileInfo>
+
+#include <utf8string.h>
+
+#include "codecompleter.h"
+
+#include "translationunitisnullexception.h"
+#include "translationunitfilenotexitexception.h"
+#include "translationunitparseerrorexception.h"
+#include "unsavedfiles.h"
+#include "projectpart.h"
+
+namespace ClangBackEnd {
+
+class TranslationUnitData
+{
+public:
+    TranslationUnitData(const Utf8String &filePath,
+                        const UnsavedFiles &unsavedFiles,
+                        const ProjectPart &projectPart);
+    ~TranslationUnitData();
+
+public:
+    time_point lastChangeTimePoint;
+    ProjectPart projectPart;
+    Utf8String filePath;
+    CXTranslationUnit translationUnit = nullptr;
+    CXIndex index = nullptr;
+    UnsavedFiles unsavedFiles;
+};
+
+TranslationUnitData::TranslationUnitData(const Utf8String &filePath,
+                                         const UnsavedFiles &unsavedFiles,
+                                         const ProjectPart &projectPart)
+    : lastChangeTimePoint(std::chrono::steady_clock::now()),
+      projectPart(projectPart),
+      filePath(filePath),
+      unsavedFiles(unsavedFiles)
+{
+}
+
+TranslationUnitData::~TranslationUnitData()
+{
+    clang_disposeTranslationUnit(translationUnit);
+    clang_disposeIndex(index);
+}
+
+TranslationUnit::TranslationUnit(const Utf8String &filePath,
+                                 const UnsavedFiles &unsavedFiles,
+                                 const ProjectPart &project,
+                                 FileExistsCheck fileExistsCheck)
+    : d(std::make_shared<TranslationUnitData>(filePath, unsavedFiles, project))
+{
+    if (fileExistsCheck == CheckIfFileExists)
+        checkIfFileExists();
+}
+
+bool TranslationUnit::isNull() const
+{
+    return !d;
+}
+
+void TranslationUnit::reset()
+{
+    d.reset();
+}
+
+CXIndex TranslationUnit::index() const
+{
+    checkIfNull();
+
+    if (!d->index)
+        d->index = clang_createIndex(1, 1);
+
+    return d->index;
+}
+
+CXTranslationUnit TranslationUnit::cxTranslationUnit() const
+{
+    checkIfNull();
+
+    removeOutdatedTranslationUnit();
+
+    createTranslationUnitIfNeeded();
+
+    return d->translationUnit;
+}
+
+const Utf8String &TranslationUnit::filePath() const
+{
+    checkIfNull();
+
+    return d->filePath;
+}
+
+const Utf8String &TranslationUnit::projectPartId() const
+{
+    checkIfNull();
+
+    return d->projectPart.projectPartId();
+}
+
+const time_point &TranslationUnit::lastChangeTimePoint() const
+{
+    return d->lastChangeTimePoint;
+}
+
+void TranslationUnit::checkIfNull() const
+{
+    if (isNull())
+        throw TranslationUnitIsNullException();
+}
+
+void TranslationUnit::checkIfFileExists() const
+{
+    if (!QFileInfo::exists(d->filePath.toString()))
+        throw TranslationUnitFileNotExitsException(d->filePath);
+}
+
+void TranslationUnit::updateLastChangeTimePoint() const
+{
+    d->lastChangeTimePoint = std::chrono::steady_clock::now();
+}
+
+void TranslationUnit::removeOutdatedTranslationUnit() const
+{
+    if (d->projectPart.lastChangeTimePoint() >= d->lastChangeTimePoint) {
+        clang_disposeTranslationUnit(d->translationUnit);
+        d->translationUnit = nullptr;
+    }
+}
+
+void TranslationUnit::createTranslationUnitIfNeeded() const
+{
+    const auto options = CXTranslationUnit_DetailedPreprocessingRecord
+            | CXTranslationUnit_CacheCompletionResults
+            | CXTranslationUnit_PrecompiledPreamble
+            | CXTranslationUnit_SkipFunctionBodies;
+
+    if (!d->translationUnit) {
+        d->translationUnit = CXTranslationUnit();
+        CXErrorCode errorCode = clang_parseTranslationUnit2(index(),
+                                                            d->filePath.constData(),
+                                                            d->projectPart.cxArguments(),
+                                                            d->projectPart.argumentCount(),
+                                                            d->unsavedFiles.cxUnsavedFiles(),
+                                                            d->unsavedFiles.count(),
+                                                            options,
+                                                            &d->translationUnit);
+
+        checkTranslationUnitErrorCode(errorCode);
+
+        updateLastChangeTimePoint();
+    }
+}
+
+void TranslationUnit::checkTranslationUnitErrorCode(CXErrorCode errorCode) const
+{
+    switch (errorCode) {
+        case CXError_Success: break;
+        default: throw TranslationUnitParseErrorException(d->filePath, d->projectPart.projectPartId());
+    }
+}
+
+uint TranslationUnit::unsavedFilesCount() const
+{
+    return d->unsavedFiles.count();
+}
+
+CXUnsavedFile *TranslationUnit::cxUnsavedFiles() const
+{
+    return d->unsavedFiles.cxUnsavedFiles();
+}
+
+TranslationUnit::~TranslationUnit() = default;
+
+TranslationUnit::TranslationUnit(const TranslationUnit &) = default;
+TranslationUnit &TranslationUnit::operator=(const TranslationUnit &) = default;
+
+TranslationUnit::TranslationUnit(TranslationUnit &&other)
+    : d(std::move(other.d))
+{
+}
+
+TranslationUnit &TranslationUnit::operator=(TranslationUnit &&other)
+{
+    d = std::move(other.d);
+
+    return *this;
+}
+
+bool operator==(const TranslationUnit &first, const TranslationUnit &second)
+{
+    return first.filePath() == second.filePath() && first.projectPartId() == second.projectPartId();
+}
+
+} // namespace ClangBackEnd
+