1 files changed, 122 insertions, 0 deletions
diff --git a/src/runtime/q3dsvariantconfig.cpp b/src/runtime/q3dsvariantconfig.cpp
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+++ b/src/runtime/q3dsvariantconfig.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** 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 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "q3dsvariantconfig_p.h"
+
+namespace qt3ds {
+
+Q3DSVariantConfig::Q3DSVariantConfig()
+{
+
+}
+
+Q3DSVariantConfig::~Q3DSVariantConfig()
+{
+    for (auto str : qAsConst(m_internalVariantList))
+        delete str;
+    m_internalVariantList.clear();
+}
+
+void Q3DSVariantConfig::setVariantList(const QStringList &variantList)
+{
+    //  Store the QStringList to be returned from the API
+    m_variantList = variantList;
+
+    for (auto str : qAsConst(m_internalVariantList))
+        delete str;
+    m_internalVariantList.clear();
+
+    // Build a fixed (in mem location) list of the variant strings
+    for (auto tag : variantList)
+        m_internalVariantList.append(new QString(tag));
+
+    // Parse the variantGroup:variant list to map using the fixed list
+    m_variantFilter.clear();
+    for (auto tag : qAsConst(m_internalVariantList)) {
+        QStringRef refTag = QStringRef(tag);
+        int separatorIdx = refTag.indexOf(QLatin1Char(':'));
+        QStringRef group = refTag.left(separatorIdx);
+        QStringRef variant = refTag.mid(separatorIdx + 1);
+        m_variantFilter[group].append(variant);
+    }
+}
+
+bool Q3DSVariantConfig::isPartOfConfig(const QStringRef &variantAttributes) const
+{
+    // Variant filter is ignored when it's not defined
+    // or if the object has no variant attributes
+    if (m_variantFilter.isEmpty() || variantAttributes.isEmpty())
+        return true;
+
+    // Collect all variant tags per group from the element
+    QHash<QStringRef, QVector<QStringRef>> groupToVariants;
+    const QVector<QStringRef> variantTags = variantAttributes.split(
+                QLatin1Char(','),
+                QString::SkipEmptyParts);
+
+    for (auto tag : variantTags) {
+        // Break each variantGroup:value to group and value strings
+        int groupSeparatorIdx = tag.indexOf(QLatin1Char(':'));
+        QStringRef group = tag.left(groupSeparatorIdx);
+
+        // Only collect variant tags that are relevant to variant filtering
+        if (m_variantFilter.contains(group)) {
+            QStringRef variant = tag.mid(groupSeparatorIdx + 1);
+            groupToVariants[group].append(variant);
+        }
+    }
+
+    // If no relevant variant tags found in element, load the element
+    if (groupToVariants.isEmpty())
+        return true;
+
+    // Verify that the element matches the variant filtering per group.
+    // To match the element must either:
+    // - Have no variant tag defined for the group
+    // - Have a matching tag for the group
+    bool isLoaded = true;
+    const auto filteredGroups = m_variantFilter.keys();
+    for (auto group : filteredGroups) {
+        const QVector<QStringRef> variants = groupToVariants[group];
+        const QVector<QStringRef> filteredVariants = m_variantFilter[group];
+
+        if (variants.size() > 0) {
+            // Check if ANY of the variant values of the element matches ANY
+            // of the included variants in the filter for this variant group
+            bool matchesFilter = false;
+            for (auto variant : variants)
+                matchesFilter |= filteredVariants.contains(variant);
+
+            isLoaded &= matchesFilter;
+        }
+    }
+
+    return isLoaded;
+}
+
+}