Clang: Add diagnostics

Diagnostics are now moved to the clang backend process. Fixits are
supported too.

Change-Id: I20faacf466bbf78dec479220c3d7b336a47bc453
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

src/plugins/clangcodemodel/clangtextmark.cpp

@@ -0,0 +1,82 @@
+/****************************************************************************
+**
+** 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 "clangtextmark.h"
+
+#include "constants.h"
+
+#include <coreplugin/coreconstants.h>
+
+#include <QString>
+#include <QApplication>
+
+#include <utils/tooltip/tooltip.h>
+
+namespace ClangCodeModel {
+
+namespace {
+
+bool isWarningOrNote(ClangBackEnd::DiagnosticSeverity severity)
+{
+    using ClangBackEnd::DiagnosticSeverity;
+    switch (severity) {
+        case DiagnosticSeverity::Ignored:
+        case DiagnosticSeverity::Note:
+        case DiagnosticSeverity::Warning: return true;
+        default: return false;
+    }
+
+    Q_UNREACHABLE();
+}
+
+Core::Id cartegoryForSeverity(ClangBackEnd::DiagnosticSeverity severity)
+{
+    return isWarningOrNote(severity) ? Constants::CLANG_WARNING : Constants::CLANG_ERROR;
+}
+
+const QIcon &iconForSeverity(ClangBackEnd::DiagnosticSeverity severity)
+{
+    static const QIcon errorIcon{QLatin1String(Core::Constants::ICON_ERROR)};
+    static const QIcon warningIcon{QLatin1String(Core::Constants::ICON_WARNING)};
+
+    return isWarningOrNote(severity) ? warningIcon : errorIcon;
+}
+
+} // anonymous namespace
+
+ClangTextMark::ClangTextMark(const QString &fileName, int lineNumber, ClangBackEnd::DiagnosticSeverity severity)
+    : TextEditor::TextMark(fileName, lineNumber, cartegoryForSeverity(severity))
+{
+    setPriority(TextEditor::TextMark::HighPriority);
+    setIcon(iconForSeverity(severity));
+}
+
+} // namespace ClangCodeModel
+