Cppcheck: Add ability to manually run cppcheck

Run cppcheck on selected files from current project via "Analyze"->"Cppcheck...."
Show results in a separate view in the same manner as ClangTools plugin.

Fixes: QTCREATORBUG-21673
Change-Id: Ibcaf4057a387a990f1da59025f15ba58f996953f
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/cppcheck/cppcheckdiagnosticsmodel.cpp

@@ -0,0 +1,143 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 Sergey Morozov
+** 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 "cppcheckdiagnosticsmodel.h"
+
+#include <coreplugin/fileiconprovider.h>
+
+#include <debugger/analyzer/diagnosticlocation.h>
+
+#include <utils/utilsicons.h>
+
+namespace Cppcheck {
+namespace Internal {
+
+using namespace Debugger;
+
+FilePathItem::FilePathItem(const QString &filePath)
+    : m_filePath(filePath)
+{}
+
+QVariant FilePathItem::data(int column, int role) const
+{
+    if (column == DiagnosticsModel::DiagnosticColumn) {
+        switch (role) {
+        case Qt::DisplayRole:
+            return m_filePath;
+        case Qt::DecorationRole:
+            return Core::FileIconProvider::icon(m_filePath);
+        case Debugger::DetailedErrorView::FullTextRole:
+            return m_filePath;
+        default:
+            return QVariant();
+        }
+    }
+
+    return QVariant();
+}
+
+DiagnosticItem::DiagnosticItem(const Diagnostic &diagnostic)
+    : m_diagnostic(diagnostic)
+{}
+
+static QIcon getIcon(const Diagnostic::Severity severity)
+{
+    switch (severity) {
+    case Diagnostic::Severity::Error:
+        return Utils::Icons::CRITICAL.icon();
+    case Diagnostic::Severity::Warning:
+        return Utils::Icons::WARNING.icon();
+    default:
+        return Utils::Icons::INFO.icon();
+    }
+}
+
+QVariant DiagnosticItem::data(int column, int role) const
+{
+    if (column == DiagnosticsModel::DiagnosticColumn) {
+        switch (role) {
+        case DetailedErrorView::LocationRole: {
+            const auto location = DiagnosticLocation(m_diagnostic.fileName.toString(),
+                                                     m_diagnostic.lineNumber,
+                                                     0);
+            return QVariant::fromValue(location);
+        }
+        case Qt::DisplayRole:
+            return QString("%1: %2").arg(m_diagnostic.lineNumber).arg(m_diagnostic.message);
+        case Qt::ToolTipRole:
+            return QString("%1: %2").arg(m_diagnostic.severityText, m_diagnostic.checkId);
+        case Qt::DecorationRole:
+            return getIcon(m_diagnostic.severity);
+        case Debugger::DetailedErrorView::FullTextRole:
+            return QString("%1:%2: %3")
+                .arg(m_diagnostic.fileName.toString())
+                .arg(m_diagnostic.lineNumber)
+                .arg(m_diagnostic.message);
+        default:
+            return QVariant();
+        }
+    }
+
+    return QVariant();
+}
+
+DiagnosticsModel::DiagnosticsModel(QObject *parent)
+    : BaseModel(parent)
+{
+    setHeader({tr("Diagnostic")});
+}
+
+void DiagnosticsModel::clear()
+{
+    const auto hasData = !m_diagnostics.isEmpty();
+    m_filePathToItem.clear();
+    m_diagnostics.clear();
+    BaseModel::clear();
+    if (hasData)
+        emit hasDataChanged(false);
+}
+
+void DiagnosticsModel::add(const Diagnostic &diagnostic)
+{
+    if (m_diagnostics.contains(diagnostic))
+        return;
+
+    const auto hasData = !m_diagnostics.isEmpty();
+    m_diagnostics.insert(diagnostic);
+    if (!hasData)
+        emit hasDataChanged(true);
+
+    const QString filePath = diagnostic.fileName.toString();
+    FilePathItem *&filePathItem = m_filePathToItem[filePath];
+    if (!filePathItem) {
+        filePathItem = new FilePathItem(filePath);
+        rootItem()->appendChild(filePathItem);
+    }
+
+    filePathItem->appendChild(new DiagnosticItem(diagnostic));
+}
+
+} // namespace Internal
+} // namespace Cppcheck