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/clangdiagnosticconfigswidget.cpp

@@ -0,0 +1,196 @@
+/****************************************************************************
+**
+** 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 "clangdiagnosticconfigswidget.h"
+#include "ui_clangdiagnosticconfigswidget.h"
+
+#include <utils/algorithm.h>
+#include <utils/qtcassert.h>
+
+#include <QDebug>
+#include <QInputDialog>
+#include <QUuid>
+
+namespace CppTools {
+namespace Internal {
+
+ClangDiagnosticConfigsWidget::ClangDiagnosticConfigsWidget(
+        const ClangDiagnosticConfigs &customConfigs,
+        const Core::Id &configToSelect,
+        QWidget *parent)
+    : QWidget(parent)
+    , m_ui(new Ui::ClangDiagnosticConfigsWidget)
+    , m_diagnosticConfigsModel(customConfigs)
+{
+    m_ui->setupUi(this);
+
+    connect(m_ui->configChooserComboBox,
+            static_cast<void(QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
+            this,
+            &ClangDiagnosticConfigsWidget::onCurrentConfigChanged);
+    connect(m_ui->copyButton, &QPushButton::clicked,
+            this, &ClangDiagnosticConfigsWidget::onCopyButtonClicked);
+    connect(m_ui->removeButton, &QPushButton::clicked,
+            this, &ClangDiagnosticConfigsWidget::onRemoveButtonClicked);
+    connect(m_ui->diagnosticOptionsTextEdit->document(), &QTextDocument::contentsChanged,
+            this, &ClangDiagnosticConfigsWidget::onDiagnosticOptionsEdited);
+
+    syncWidgetsToModel(configToSelect);
+}
+
+ClangDiagnosticConfigsWidget::~ClangDiagnosticConfigsWidget()
+{
+    delete m_ui;
+}
+
+void ClangDiagnosticConfigsWidget::onCurrentConfigChanged(int)
+{
+    syncOtherWidgetsToComboBox();
+}
+
+static ClangDiagnosticConfig createCustomConfig(const ClangDiagnosticConfig &config,
+                                                const QString &displayName)
+{
+    ClangDiagnosticConfig copied = config;
+    copied.setId(Core::Id::fromString(QUuid::createUuid().toString()));
+    copied.setDisplayName(displayName);
+    copied.setIsReadOnly(false);
+
+    return copied;
+}
+
+void ClangDiagnosticConfigsWidget::onCopyButtonClicked()
+{
+    const ClangDiagnosticConfig &config = currentConfig();
+
+    bool diaglogAccepted = false;
+    const QString newName = QInputDialog::getText(this,
+                                                  tr("Copy Diagnostic Configuration"),
+                                                  tr("Diagnostic configuration name:"),
+                                                  QLineEdit::Normal,
+                                                  tr("%1 (Copy)").arg(config.displayName()),
+                                                  &diaglogAccepted);
+    if (diaglogAccepted) {
+        const ClangDiagnosticConfig customConfig = createCustomConfig(config, newName);
+        m_diagnosticConfigsModel.appendOrUpdate(customConfig);
+
+        syncConfigChooserToModel(customConfig.id());
+        m_ui->diagnosticOptionsTextEdit->setFocus();
+    }
+}
+
+void ClangDiagnosticConfigsWidget::onRemoveButtonClicked()
+{
+    m_diagnosticConfigsModel.removeConfigWithId(currentConfigId());
+
+    syncConfigChooserToModel();
+}
+
+void ClangDiagnosticConfigsWidget::onDiagnosticOptionsEdited()
+{
+    const QString diagnosticOptions
+            = m_ui->diagnosticOptionsTextEdit->document()->toPlainText().trimmed();
+    const QStringList updatedCommandLine
+            = diagnosticOptions.trimmed().split(QLatin1Char(' '), QString::SkipEmptyParts);
+
+    ClangDiagnosticConfig updatedConfig = currentConfig();
+    updatedConfig.setCommandLineOptions(updatedCommandLine);
+
+    m_diagnosticConfigsModel.appendOrUpdate(updatedConfig);
+}
+
+void ClangDiagnosticConfigsWidget::syncWidgetsToModel(const Core::Id &configToSelect)
+{
+    syncConfigChooserToModel(configToSelect);
+    syncOtherWidgetsToComboBox();
+}
+
+static QString adaptedDisplayName(const ClangDiagnosticConfig &config)
+{
+    return config.isReadOnly()
+        ? QObject::tr("%1 [built-in]").arg(config.displayName())
+        : config.displayName();
+}
+
+void ClangDiagnosticConfigsWidget::syncConfigChooserToModel(const Core::Id &configToSelect)
+{
+    m_ui->configChooserComboBox->clear();
+    int currentIndex = -1;
+
+    const int size = m_diagnosticConfigsModel.size();
+    for (int i = 0; i < size; ++i) {
+        const ClangDiagnosticConfig &config = m_diagnosticConfigsModel.at(i);
+        m_ui->configChooserComboBox->addItem(adaptedDisplayName(config), config.id().toSetting());
+
+        if (configToSelect == config.id())
+            currentIndex = i;
+    }
+
+    if (currentIndex != -1)
+        m_ui->configChooserComboBox->setCurrentIndex(currentIndex);
+}
+
+void ClangDiagnosticConfigsWidget::syncOtherWidgetsToComboBox()
+{
+    if (isConfigChooserEmpty())
+        return;
+
+    const ClangDiagnosticConfig &config = currentConfig();
+
+    // Update main button row
+    m_ui->removeButton->setEnabled(!config.isReadOnly());
+
+    // Update child widgets
+    const QString commandLineOptions = config.commandLineOptions().join(QLatin1Char(' '));
+    m_ui->diagnosticOptionsTextEdit->document()->setPlainText(commandLineOptions);
+    m_ui->diagnosticOptionsTextEdit->setReadOnly(config.isReadOnly());
+}
+
+bool ClangDiagnosticConfigsWidget::isConfigChooserEmpty() const
+{
+    return m_ui->configChooserComboBox->count() == 0;
+}
+
+const ClangDiagnosticConfig &ClangDiagnosticConfigsWidget::currentConfig() const
+{
+    return m_diagnosticConfigsModel.configWithId(currentConfigId());
+}
+
+Core::Id ClangDiagnosticConfigsWidget::currentConfigId() const
+{
+    return Core::Id::fromSetting(m_ui->configChooserComboBox->currentData());
+}
+
+ClangDiagnosticConfigs ClangDiagnosticConfigsWidget::customConfigs() const
+{
+    const ClangDiagnosticConfigs allConfigs = m_diagnosticConfigsModel.configs();
+
+    return Utils::filtered(allConfigs, [](const ClangDiagnosticConfig &config){
+        return !config.isReadOnly();
+    });
+}
+
+} // Internal namespace
+} // CppTools namespace