Clang: Introduce switching/adding of warning configurations

A warning configuration is a list of command line (warning) options for
libclang. Three non-editable built-in configurations are provided by
default. The user can copy a configuration to customize it.

This is still a global setting and it changes take effect after
re-opening a document. Both issues will be addressed in follow-up
changes.

Change-Id: I86667d7dc39ad31b88666454220e6da563797740
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@theqtcompany.com>
Reviewed-by: Marco Bubke <marco.bubke@theqtcompany.com>

src/plugins/cpptools/clangdiagnosticconfigsmodel.cpp

@@ -0,0 +1,146 @@
+/****************************************************************************
+**
+** 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 "clangdiagnosticconfigsmodel.h"
+
+#include "cpptoolsconstants.h"
+
+#include <utils/algorithm.h>
+
+#include <QCoreApplication>
+
+namespace CppTools {
+namespace Internal {
+
+static void addConfigForQuestionableConstructs(ClangDiagnosticConfigsModel &model)
+{
+    ClangDiagnosticConfig config;
+    config.setId("Builtin.Questionable");
+    config.setDisplayName(QCoreApplication::translate("ClangDiagnosticConfigsModel",
+                                                      "Warnings for questionable constructs"));
+    config.setIsReadOnly(true);
+    config.setCommandLineOptions({
+        QStringLiteral("-Wall"),
+        QStringLiteral("-Wextra"),
+    });
+
+    model.appendOrUpdate(config);
+}
+
+static void addConfigForPedanticWarnings(ClangDiagnosticConfigsModel &model)
+{
+    ClangDiagnosticConfig config;
+    config.setId("Builtin.Pedantic");
+    config.setDisplayName(QCoreApplication::translate("ClangDiagnosticConfigsModel",
+                                                      "Pedantic Warnings"));
+    config.setIsReadOnly(true);
+    config.setCommandLineOptions({QStringLiteral("-Wpedantic")});
+
+    model.appendOrUpdate(config);
+}
+
+static void addConfigForAlmostEveryWarning(ClangDiagnosticConfigsModel &model)
+{
+    ClangDiagnosticConfig config;
+    config.setId(Constants::CPP_CLANG_BUILTIN_CONFIG_ID_EVERYTHING_WITH_EXCEPTIONS);
+    config.setDisplayName(QCoreApplication::translate("ClangDiagnosticConfigsModel",
+                                                      "Warnings for almost everything"));
+    config.setIsReadOnly(true);
+    config.setCommandLineOptions({
+        QStringLiteral("-Weverything"),
+        QStringLiteral("-Wno-c++98-compat"),
+        QStringLiteral("-Wno-c++98-compat-pedantic"),
+        QStringLiteral("-Wno-unused-macros"),
+        QStringLiteral("-Wno-newline-eof"),
+        QStringLiteral("-Wno-exit-time-destructors"),
+        QStringLiteral("-Wno-global-constructors"),
+        QStringLiteral("-Wno-gnu-zero-variadic-macro-arguments"),
+        QStringLiteral("-Wno-documentation"),
+        QStringLiteral("-Wno-shadow"),
+        QStringLiteral("-Wno-missing-prototypes"), // Not optimal for C projects.
+    });
+
+    model.appendOrUpdate(config);
+}
+
+static void addBuiltinConfigs(ClangDiagnosticConfigsModel &model)
+{
+    addConfigForPedanticWarnings(model);
+    addConfigForQuestionableConstructs(model);
+    addConfigForAlmostEveryWarning(model);
+}
+
+ClangDiagnosticConfigsModel::ClangDiagnosticConfigsModel(const ClangDiagnosticConfigs &customConfigs)
+{
+    addBuiltinConfigs(*this);
+
+    foreach (const ClangDiagnosticConfig &config, customConfigs)
+        m_diagnosticConfigs.append(config);
+}
+
+int ClangDiagnosticConfigsModel::size() const
+{
+    return m_diagnosticConfigs.size();
+}
+
+const ClangDiagnosticConfig &ClangDiagnosticConfigsModel::at(int index) const
+{
+    return m_diagnosticConfigs.at(index);
+}
+
+void ClangDiagnosticConfigsModel::appendOrUpdate(const ClangDiagnosticConfig &config)
+{
+    const int index = indexOfConfig(config.id());
+
+    if (index >= 0 && index < m_diagnosticConfigs.size())
+        m_diagnosticConfigs.replace(index, config);
+    else
+        m_diagnosticConfigs.append(config);
+}
+
+void ClangDiagnosticConfigsModel::removeConfigWithId(const Core::Id &id)
+{
+    m_diagnosticConfigs.removeOne(configWithId(id));
+}
+
+ClangDiagnosticConfigs ClangDiagnosticConfigsModel::configs() const
+{
+    return m_diagnosticConfigs;
+}
+
+const ClangDiagnosticConfig &ClangDiagnosticConfigsModel::configWithId(const Core::Id &id) const
+{
+    return m_diagnosticConfigs.at(indexOfConfig(id));
+}
+
+int ClangDiagnosticConfigsModel::indexOfConfig(const Core::Id &id) const
+{
+    return Utils::indexOf(m_diagnosticConfigs, [&](const ClangDiagnosticConfig &config) {
+       return config.id() == id;
+    });
+}
+
+} // namespace Internal
+} // namespace CppTools