TextEditor: move Link class to separate header in Utils

Link is a common class and is used across the plugins.

Change-Id: Id92e47e1b8604316ca8b970804e57abaf404ec28
Reviewed-by: David Schulz <david.schulz@qt.io>

src/libs/utils/link.h

@@ -0,0 +1,62 @@
+/****************************************************************************
+**
+** 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.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <QString>
+#include <qmetatype.h>
+
+namespace Utils {
+
+struct Link
+{
+    Link(const QString &fileName = QString(), int line = 0, int column = 0)
+        : linkTextStart(-1)
+        , linkTextEnd(-1)
+        , targetFileName(fileName)
+        , targetLine(line)
+        , targetColumn(column)
+    {}
+
+    bool hasValidTarget() const
+    { return !targetFileName.isEmpty(); }
+
+    bool hasValidLinkText() const
+    { return linkTextStart != linkTextEnd; }
+
+    bool operator==(const Link &other) const
+    { return linkTextStart == other.linkTextStart && linkTextEnd == other.linkTextEnd; }
+
+    int linkTextStart;
+    int linkTextEnd;
+
+    QString targetFileName;
+    int targetLine;
+    int targetColumn;
+};
+
+} // namespace Utils
+
+Q_DECLARE_METATYPE(Utils::Link)