1 files changed, 110 insertions, 0 deletions
diff --git a/src/quicktemplates2/qquickdeferredexecute.cpp b/src/quicktemplates2/qquickdeferredexecute.cpp
new file mode 100644
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+++ b/src/quicktemplates2/qquickdeferredexecute.cpp
@@ -0,0 +1,110 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Quick Templates 2 module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/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 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qquickdeferredexecute_p_p.h"
+
+#include <QtQml/qqmlengine.h>
+#include <QtQml/private/qqmldata_p.h>
+#include <QtQml/private/qqmlcomponent_p.h>
+#include <QtQml/private/qqmlobjectcreator_p.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace QtQuickPrivate {
+
+static void beginDeferred(QQmlEnginePrivate *enginePriv, const QQmlProperty &property, QQmlComponentPrivate::DeferredState *deferredState)
+{
+    QObject *object = property.object();
+    QQmlData *ddata = QQmlData::get(object);
+    Q_ASSERT(!ddata->deferredData.isEmpty());
+
+    int propertyIndex = property.index();
+
+    for (auto dit = ddata->deferredData.rbegin(); dit != ddata->deferredData.rend(); ++dit) {
+        QQmlData::DeferredData *deferData = *dit;
+
+        auto range = deferData->bindings.equal_range(propertyIndex);
+        if (range.first == deferData->bindings.end())
+            continue;
+
+        QQmlComponentPrivate::ConstructionState *state = new QQmlComponentPrivate::ConstructionState;
+        state->completePending = true;
+
+        QQmlContextData *creationContext = nullptr;
+        state->creator.reset(new QQmlObjectCreator(deferData->context->parent, deferData->compilationUnit, creationContext));
+
+        enginePriv->inProgressCreations++;
+
+        typedef QMultiHash<int, const QV4::CompiledData::Binding *> QV4PropertyBindingHash;
+        auto it = std::reverse_iterator<QV4PropertyBindingHash::iterator>(range.second);
+        auto last = std::reverse_iterator<QV4PropertyBindingHash::iterator>(range.first);
+        while (it != last) {
+            if (!state->creator->populateDeferredBinding(property, deferData, *it))
+                state->errors << state->creator->errors;
+            ++it;
+        }
+
+        deferredState->constructionStates += state;
+
+        // Cleanup any remaining deferred bindings for this property, also in inner contexts,
+        // to avoid executing them later and overriding the property that was just populated.
+        while (dit != ddata->deferredData.rend()) {
+            (*dit)->bindings.remove(propertyIndex);
+            ++dit;
+        }
+        break;
+    }
+}
+
+void executeDeferred(QObject *object, const QString &property)
+{
+    QQmlData *data = QQmlData::get(object);
+    if (data && !data->deferredData.isEmpty() && !data->wasDeleted(object)) {
+        QQmlEnginePrivate *ep = QQmlEnginePrivate::get(data->context->engine);
+
+        QQmlComponentPrivate::DeferredState state;
+        beginDeferred(ep, QQmlProperty(object, property), &state);
+
+        // Release deferred data for those compilation units that no longer have deferred bindings
+        data->releaseDeferredData();
+
+        QQmlComponentPrivate::completeDeferred(ep, &state);
+    }
+}
+
+} // QtQuickPrivate
+
+QT_END_NAMESPACE