QmlProfiler: Add model template for range data

In order to unify the uses of range data and the calculation of first
and last ranges in visible areas we need a template class to provide the
respective algorithms.

Change-Id: I1c2e9c9fa9ae048262026236c4ff39017ab7913f
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

src/plugins/qmlprofiler/sortedtimelinemodel.cpp

@@ -0,0 +1,110 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+/*!
+    \class QmlProfiler::SortedTimelineModel
+    \brief Sorted model for timeline data
+
+    The SortedTimelineModel lets you keep any kind of range data sorted by
+    both start and end times, so that visible ranges can easily be computed.
+*/
+
+/*!
+    \fn SortedTimelineModel::clear()
+    Clears the ranges and their end times.
+*/
+
+/*!
+    \fn int SortedTimelineModel::count() const
+    Returns the number of ranges in the model.
+*/
+
+/*!
+    \fn qint64 SortedTimelineModel::firstStartTime() const
+    Returns the begin of the first range in the model.
+*/
+
+/*!
+    \fn qint64 SortedTimelineModel::lastEndTime() const
+    Returns the end of the last range in the model.
+*/
+
+/*!
+    \fn const SortedTimelineModel<Data>::Range &SortedTimelineModel::range(int index) const
+    Returns the range data at the specified index.
+*/
+
+/*!
+    \fn Data &SortedTimelineModel::data(int index)
+    Returns modifiable user data for the range at the specified index.
+*/
+
+/*!
+    \fn int SortedTimelineModel::insert(qint64 startTime, qint64 duration, const Data &item)
+    Inserts the given data at the given time position and returns its index.
+*/
+
+/*!
+    \fn int SortedTimelineModel::insertStart(qint64 startTime, const Data &item)
+    Inserts the given data as range start at the given time position and
+    returns its index. The range end isn't set.
+*/
+
+/*!
+    \fn int SortedTimelineModel::insertEnd(int index, qint64 duration)
+    Adds a range end for the given start index.
+*/
+
+/*!
+    \fn int SortedTimelineModel::findFirstIndexNoParents(qint64 startTime) const
+    Looks up the first range with an end time greater than the given time and
+    returns its index. If no such range is found it returns -1.
+*/
+
+/*!
+    \fn int SortedTimelineModel::findFirstIndex(qint64 startTime) const
+    Looks up the first range with an end time greater than the given time and
+    returns its parent's index. If no such range is found it returns -1. If there
+    is no parent it returns the found range's index. The parent of a range is the
+    range with the lowest start time that completely covers the child range.
+    "Completely covers" means:
+    parent.startTime <= child.startTime && parent.endTime >= child.endTime
+*/
+
+/*!
+    \fn int SortedTimelineModel::findLastIndex(qint64 endTime) const
+    Looks up the last range with a start time smaller than the given time and
+    returns its index. If no such range is found it returns -1.
+*/
+
+/*!
+    \fn void computeNesting()
+    Compute all ranges' parents.
+    \sa findFirstIndex
+*/