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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "mimetypemodel.h"
#include <QDebug>
#include <QIcon>
#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 };
QT_BEGIN_NAMESPACE
bool operator<(const QMimeType &t1, const QMimeType &t2)
{
return t1.name() < t2.name();
}
QT_END_NAMESPACE
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 = qvariant_cast<QMimeType>(item->data(mimeTypeRole)).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 qvariant_cast<QMimeType>(index.data(mimeTypeRole));
}
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.parentMimeTypes().contains(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>"
<< "<tr><td>Generic icon name</td><td>" << t.genericIconName() << "</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;
}
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