1 files changed, 127 insertions, 0 deletions
diff --git a/src/quickdialogs/quickdialogsutils/qquickfilenamefilter.cpp b/src/quickdialogs/quickdialogsutils/qquickfilenamefilter.cpp
new file mode 100644
index 0000000000..537ca1f058
--- /dev/null
+++ b/src/quickdialogs/quickdialogsutils/qquickfilenamefilter.cpp
@@ -0,0 +1,127 @@
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#include "qquickfilenamefilter_p.h"
+
+#include <QtCore/qloggingcategory.h>
+
+QT_BEGIN_NAMESPACE
+
+Q_LOGGING_CATEGORY(lcFileNameFilter, "qt.quick.dialogs.qquickfilenamefilter")
+
+QQuickFileNameFilter::QQuickFileNameFilter(QObject *parent)
+    : QObject(parent), m_index(-1)
+{
+}
+
+int QQuickFileNameFilter::index() const
+{
+    return m_index;
+}
+
+void QQuickFileNameFilter::setIndex(int index)
+{
+    if (m_index == index)
+        return;
+
+    m_index = index;
+    emit indexChanged(index);
+}
+
+QString QQuickFileNameFilter::name() const
+{
+    return m_name;
+}
+
+QStringList QQuickFileNameFilter::extensions() const
+{
+    return m_extensions;
+}
+
+QStringList QQuickFileNameFilter::globs() const
+{
+    return m_globs;
+}
+
+QSharedPointer<QFileDialogOptions> QQuickFileNameFilter::options() const
+{
+    return m_options;
+}
+
+void QQuickFileNameFilter::setOptions(const QSharedPointer<QFileDialogOptions> &options)
+{
+    m_options = options;
+}
+
+static QString extractName(const QString &filter)
+{
+    return filter.left(filter.indexOf(QLatin1Char('(')) - 1);
+}
+
+static QString extractExtension(QStringView filter)
+{
+    return filter.mid(filter.indexOf(QLatin1Char('.')) + 1).toString();
+}
+
+static void extractExtensionsAndGlobs(QStringView filter, QStringList &extensions, QStringList &globs)
+{
+    extensions.clear();
+    globs.clear();
+
+    const int from = filter.indexOf(QLatin1Char('('));
+    const int to = filter.lastIndexOf(QLatin1Char(')')) - 1;
+    if (from >= 0 && from < to) {
+        const QStringView ref = filter.mid(from + 1, to - from);
+        const QList<QStringView> exts = ref.split(QLatin1Char(' '), Qt::SkipEmptyParts);
+        // For example, given the filter "HTML files (*.html *.htm)",
+        // "ref" would be "*.html" and "*.htm".
+        for (const QStringView &ref : exts) {
+            extensions += extractExtension(ref);
+            globs += ref.toString();
+        }
+    }
+}
+
+void QQuickFileNameFilter::update(const QString &filter)
+{
+    const QStringList filters = nameFilters();
+
+    const int oldIndex = m_index;
+    const QString oldName = m_name;
+    const QStringList oldExtensions = m_extensions;
+    const QStringList oldGlobs = m_globs;
+
+    m_index = filters.indexOf(filter);
+    m_name = extractName(filter);
+    extractExtensionsAndGlobs(filter, m_extensions, m_globs);
+
+    if (oldIndex != m_index)
+        emit indexChanged(m_index);
+    if (oldName != m_name)
+        emit nameChanged(m_name);
+    if (oldExtensions != m_extensions)
+        emit extensionsChanged(m_extensions);
+    if (oldGlobs != m_globs)
+        emit globsChanged(m_globs);
+
+    qCDebug(lcFileNameFilter).nospace() << "update called on " << this << " of " << parent()
+        << " with filter " << filter << " (current filters are " << filters << "):"
+        << "\n    old index=" << oldIndex << "new index=" << m_index
+        << "\n    old name=" << oldName << "new name=" << m_name
+        << "\n    old extensions=" << oldExtensions << "new extensions=" << m_extensions
+        << "\n    old glob=s" << oldGlobs << "new globs=" << m_globs;
+}
+
+QStringList QQuickFileNameFilter::nameFilters() const
+{
+    return m_options ? m_options->nameFilters() : QStringList();
+}
+
+QString QQuickFileNameFilter::nameFilter(int index) const
+{
+    return m_options ? m_options->nameFilters().value(index) : QString();
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qquickfilenamefilter_p.cpp"