QmlDesigner: Add ExplicitImageCacheImageProvider

Task-number: QDS-5860
Change-Id: I755ddedebbfb9f7bcf0b6c93069f3e762706cb7f
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

src/plugins/qmldesigner/CMakeLists.txt

@@ -343,6 +343,7 @@ extend_qtc_plugin(QmlDesigner
     include/propertybinding.h
     include/qml3dnode.h
     include/qmlvisualnode.h
+
 )
 
 extend_qtc_plugin(QmlDesigner
@@ -352,6 +353,14 @@ extend_qtc_plugin(QmlDesigner
     interactiveconnectionmanager.cpp interactiveconnectionmanager.h
 )
 
+extend_qtc_plugin(QmlDesigner
+  SOURCES_PREFIX designercore/imagecache
+  SOURCES
+    explicitimagecacheimageprovider.cpp
+    explicitimagecacheimageprovider.h
+
+)
+
 extend_qtc_plugin(QmlDesigner
   SOURCES_PREFIX designercore
   PUBLIC_INCLUDES designercore

src/plugins/qmldesigner/designercore/imagecache/explicitimagecacheimageprovider.cpp

@@ -0,0 +1,96 @@
+/****************************************************************************
+**
+** Copyright (C) 2022 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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.
+**
+****************************************************************************/
+
+#include "explicitimagecacheimageprovider.h"
+
+#include <asynchronousexplicitimagecache.h>
+
+#include <QMetaObject>
+#include <QQuickImageResponse>
+
+namespace QmlDesigner {
+
+class ImageRespose : public QQuickImageResponse
+{
+public:
+    ImageRespose(const QImage &defaultImage)
+        : m_image(defaultImage)
+    {}
+
+    QQuickTextureFactory *textureFactory() const override
+    {
+        return QQuickTextureFactory::textureFactoryForImage(m_image);
+    }
+
+    void setImage(const QImage &image)
+    {
+        m_image = image;
+
+        emit finished();
+    }
+
+    void abort() { emit finished(); }
+
+private:
+    QImage m_image;
+};
+
+QQuickImageResponse *ExplicitImageCacheImageProvider::requestImageResponse(const QString &id,
+                                                                           const QSize &)
+{
+    auto response = std::make_unique<ImageRespose>(m_defaultImage);
+
+    m_cache.requestSmallImage(
+        id,
+        [response = QPointer<ImageRespose>(response.get())](const QImage &image) {
+            QMetaObject::invokeMethod(
+                response,
+                [response, image] {
+                    if (response)
+                        response->setImage(image);
+                },
+                Qt::QueuedConnection);
+        },
+        [response = QPointer<ImageRespose>(response.get())](ImageCache::AbortReason abortReason) {
+            QMetaObject::invokeMethod(
+                response,
+                [response, abortReason] {
+                    switch (abortReason) {
+                    case ImageCache::AbortReason::Failed:
+                        if (response)
+                            response->abort();
+                        break;
+                    case ImageCache::AbortReason::Abort:
+                        response->cancel();
+                        break;
+                    }
+                },
+                Qt::QueuedConnection);
+        });
+
+    return response.release();
+}
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/designercore/imagecache/explicitimagecacheimageprovider.h

@@ -0,0 +1,51 @@
+/****************************************************************************
+**
+** Copyright (C) 2022 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <QQuickAsyncImageProvider>
+#include <QQuickImageResponse>
+
+namespace QmlDesigner {
+
+class AsynchronousExplicitImageCache;
+
+class ExplicitImageCacheImageProvider : public QQuickAsyncImageProvider
+{
+public:
+    ExplicitImageCacheImageProvider(AsynchronousExplicitImageCache &imageCache,
+                                    const QImage &defaultImage)
+        : m_cache(imageCache)
+        , m_defaultImage(defaultImage)
+    {}
+
+    QQuickImageResponse *requestImageResponse(const QString &id, const QSize &requestedSize) override;
+
+private:
+    AsynchronousExplicitImageCache &m_cache;
+    QImage m_defaultImage;
+};
+
+} // namespace QmlDesigner