1 files changed, 199 insertions, 0 deletions
diff --git a/examples/corelib/mimetypes/mimetypebrowser/mimetypemodel.cpp b/examples/corelib/mimetypes/mimetypebrowser/mimetypemodel.cpp
new file mode 100644
index 0000000000..81e4eb10cd
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+++ b/examples/corelib/mimetypes/mimetypebrowser/mimetypemodel.cpp
@@ -0,0 +1,199 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "mimetypemodel.h"
+
+#include <QIcon>
+
+#include <QDebug>
+#include <QMimeDatabase>
+#include <QTextStream>
+#include <QVariant>
+
+#include <algorithm>
+
+Q_DECLARE_METATYPE(QMimeType)
+
+typedef QList<QStandardItem *> StandardItemList;
+
+enum { mimeTypeRole = Qt::UserRole + 1, iconQueriedRole = Qt::UserRole + 2 };
+
+bool operator<(const QMimeType &t1, const QMimeType &t2)
+{
+    return t1.name() < t2.name();
+}
+
+static StandardItemList createRow(const QMimeType &t)
+{
+    const QVariant v = QVariant::fromValue(t);
+    QStandardItem *nameItem = new QStandardItem(t.name());
+    const Qt::ItemFlags flags = Qt::ItemIsSelectable | Qt::ItemIsEnabled;
+    nameItem->setData(v, mimeTypeRole);
+    nameItem->setData(QVariant(false), iconQueriedRole);
+    nameItem->setFlags(flags);
+    nameItem->setToolTip(t.comment());
+    return StandardItemList{nameItem};
+}
+
+MimetypeModel::MimetypeModel(QObject *parent)
+    : QStandardItemModel(0, ColumnCount, parent)
+{
+    setHorizontalHeaderLabels(QStringList{tr("Name")});
+    populate();
+}
+
+QVariant MimetypeModel::data(const QModelIndex &index, int role) const
+{
+    if (role != Qt::DecorationRole || !index.isValid() || index.data(iconQueriedRole).toBool())
+        return QStandardItemModel::data(index, role);
+    QStandardItem *item = itemFromIndex(index);
+    const QString iconName = item->data(mimeTypeRole).value<QMimeType>().iconName();
+    if (!iconName.isEmpty())
+        item->setIcon(QIcon::fromTheme(iconName));
+    item->setData(QVariant(true), iconQueriedRole);
+    return item->icon();
+}
+
+QMimeType MimetypeModel::mimeType(const QModelIndex &index) const
+{
+    return index.data(mimeTypeRole).value<QMimeType>();
+}
+
+void MimetypeModel::populate()
+{
+    typedef QList<QMimeType>::Iterator Iterator;
+
+    QMimeDatabase mimeDatabase;
+    QList<QMimeType> allTypes = mimeDatabase.allMimeTypes();
+
+    // Move top level types to rear end of list, sort this partition,
+    // create top level items and truncate the list.
+    Iterator end = allTypes.end();
+    const Iterator topLevelStart =
+        std::stable_partition(allTypes.begin(), end,
+                              [](const QMimeType &t) { return !t.parentMimeTypes().isEmpty(); });
+    std::stable_sort(topLevelStart, end);
+    for (Iterator it = topLevelStart; it != end; ++it) {
+        const StandardItemList row = createRow(*it);
+        appendRow(row);
+        m_nameIndexHash.insert(it->name(), indexFromItem(row.constFirst()));
+    }
+    allTypes.erase(topLevelStart, end);
+
+    while (!allTypes.isEmpty()) {
+        // Find a type inheriting one that is already in the model.
+        end = allTypes.end();
+        auto nameIndexIt = m_nameIndexHash.constEnd();
+        for (Iterator it = allTypes.begin(); it != end; ++it) {
+            nameIndexIt = m_nameIndexHash.constFind(it->parentMimeTypes().constFirst());
+            if (nameIndexIt != m_nameIndexHash.constEnd())
+                break;
+        }
+        if (nameIndexIt == m_nameIndexHash.constEnd()) {
+            qWarning() << "Orphaned mime types:" << allTypes;
+            break;
+        }
+
+        // Move types inheriting the parent type to rear end of list, sort this partition,
+        // append the items to parent and truncate the list.
+        const QString &parentName = nameIndexIt.key();
+        const Iterator start =
+            std::stable_partition(allTypes.begin(), end,
+                                  [parentName](const QMimeType &t) { return !t.inherits(parentName); });
+        std::stable_sort(start, end);
+        QStandardItem *parentItem = itemFromIndex(nameIndexIt.value());
+        for (Iterator it = start; it != end; ++it) {
+            const StandardItemList row = createRow(*it);
+            parentItem->appendRow(row);
+            m_nameIndexHash.insert(it->name(), indexFromItem(row.constFirst()));
+        }
+        allTypes.erase(start, end);
+    }
+}
+
+QTextStream &operator<<(QTextStream &stream, const QStringList &list)
+{
+    for (int i = 0, size = list.size(); i < size; ++i) {
+        if (i)
+            stream << ", ";
+        stream << list.at(i);
+    }
+    return stream;
+}
+
+QString MimetypeModel::formatMimeTypeInfo(const QMimeType &t)
+{
+    QString result;
+    QTextStream str(&result);
+    str << "<html><head/><body><h3><center>" << t.name() << "</center></h3><br><table>";
+
+    const QStringList &aliases = t.aliases();
+    if (!aliases.isEmpty())
+        str << "<tr><td>Aliases:</td><td>" << " (" << aliases << ')';
+
+    str << "</td></tr>"
+        << "<tr><td>Comment:</td><td>" << t.comment() << "</td></tr>"
+        << "<tr><td>Icon name:</td><td>" << t.iconName() << "</td></tr>";
+
+    const QString &filter = t.filterString();
+    if (!filter.isEmpty())
+        str << "<tr><td>Filter:</td><td>" << t.filterString() << "</td></tr>";
+
+    const QStringList &patterns = t.globPatterns();
+    if (!patterns.isEmpty())
+        str << "<tr><td>Glob patterns:</td><td>" << patterns << "</td></tr>";
+
+    const QStringList &parentMimeTypes = t.parentMimeTypes();
+    if (!parentMimeTypes.isEmpty())
+        str << "<tr><td>Parent types:</td><td>" << t.parentMimeTypes() << "</td></tr>";
+
+    QStringList suffixes = t.suffixes();
+    if (!suffixes.isEmpty()) {
+        str << "<tr><td>Suffixes:</td><td>";
+        const QString &preferredSuffix = t.preferredSuffix();
+        if (!preferredSuffix.isEmpty()) {
+            suffixes.removeOne(preferredSuffix);
+            str << "<b>" << preferredSuffix << "</b> ";
+        }
+        str << suffixes << "</td></tr>";
+    }
+    str << "</table></body></html>";
+    return result;
+}