Clang: Add clang refactoring

Change-Id: I2e3f36f810276da3f8dc7dcc587b06f8edb586d3
GPush-Base: d02f51b48fc752fddcdef6dcb32b3f7f6c0195a3
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/tools/clangrefactoringbackend/source/symbolfinder.cpp

@@ -0,0 +1,121 @@
+/****************************************************************************
+**
+** 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 "symbolfinder.h"
+
+#include "refactoringcompilationdatabase.h"
+#include "sourcefilecallbacks.h"
+#include "symbollocationfinderaction.h"
+
+namespace ClangBackEnd {
+
+SymbolFinder::SymbolFinder(uint line, uint column)
+    : usrFindingAction(line, column),
+      sourceFileCallbacks(line, column)
+{
+}
+
+namespace {
+
+// use std::filesystem::path if it is supported by all compilers
+
+std::string toNativePath(std::string &&path)
+{
+#ifdef WIN32
+    std::transform(path.begin(), path.end(), path.begin(), [] (char sign) {
+        return sign == '/' ? '\\' : sign;
+    });
+#endif
+
+    return std::move(path);
+}
+}
+
+void SymbolFinder::addFile(std::string &&directory,
+                           std::string &&fileName,
+                           std::string &&content,
+                           std::vector<std::string> &&commandLine)
+{
+    fileContents.emplace_back(toNativePath(std::move(directory)),
+                              std::move(fileName),
+                              std::move(content),
+                              std::move(commandLine));
+}
+
+void SymbolFinder::findSymbol()
+{
+    RefactoringCompilationDatabase compilationDatabase;
+
+    for (auto &&fileContent : fileContents)
+        compilationDatabase.addFile(fileContent.directory, fileContent.fileName, fileContent.commandLine);
+
+    std::vector<std::string> files;
+
+    for (auto &&fileContent : fileContents)
+        files.push_back(fileContent.filePath);
+
+    clang::tooling::ClangTool tool(compilationDatabase, files);
+
+    for (auto &&fileContent : fileContents) {
+        if (!fileContent.content.empty())
+            tool.mapVirtualFile(fileContent.filePath, fileContent.content);
+    }
+
+    tool.run(clang::tooling::newFrontendActionFactory(&usrFindingAction, &sourceFileCallbacks).get());
+
+    if (sourceFileCallbacks.hasSourceLocations()) {
+        sourceLocations_ = sourceFileCallbacks.takeSourceLocations();
+        symbolName = sourceFileCallbacks.takeSymbolName();
+    } else {
+        symbolLocationFinderAction.setUnifiedSymbolResolutions(usrFindingAction.takeUnifiedSymbolResolutions());
+
+        tool.run(clang::tooling::newFrontendActionFactory(&symbolLocationFinderAction).get());
+
+        sourceLocations_ = symbolLocationFinderAction.takeSourceLocations();
+        symbolName = usrFindingAction.takeSymbolName();
+    }
+}
+
+Utils::SmallString SymbolFinder::takeSymbolName()
+{
+    return std::move(symbolName);
+}
+
+const std::vector<USRName> &SymbolFinder::unifiedSymbolResolutions()
+{
+    return symbolLocationFinderAction.unifiedSymbolResolutions();
+}
+
+const SourceLocationsContainer &SymbolFinder::sourceLocations() const
+{
+    return sourceLocations_;
+}
+
+SourceLocationsContainer SymbolFinder::takeSourceLocations()
+{
+    return std::move(sourceLocations_);
+}
+
+} // namespace ClangBackEnd