AssetExport: Add generated UUID to qml

This will enable the merge when importing back from Photoshop

Task-number: QDS-1555
Change-Id: I411ad65af1a33a80fcea80206aef93e2d1afa357
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/assetexporterplugin/assetexporter.cpp

@@ -25,7 +25,9 @@
 #include "assetexporter.h"
 #include "componentexporter.h"
 #include "exportnotification.h"
+#include "assetexportpluginconstants.h"
 
+#include "rewriterview.h"
 #include "qmlitemnode.h"
 #include "qmlobjectnode.h"
 #include "utils/qtcassert.h"
@@ -142,12 +144,7 @@ bool AssetExporter::isBusy() const
 Utils::FilePath AssetExporter::exportAsset(const QmlObjectNode &node)
 {
     // TODO: Use this hash as UUID and add to the node.
-    QByteArray hash;
+    QByteArray hash = addNodeUUID(node.modelNode());
-    do {
-        hash = generateHash(node.id());
-    } while (m_usedHashes.contains(hash));
-    m_usedHashes.insert(hash);
-
     Utils::FilePath assetPath = m_exportPath.pathAppended(QString("assets/%1.png")
                                                           .arg(QString::fromLatin1(hash)));
     m_assetDumper->dumpAsset(node.toQmlItemNode().instanceRenderPixmap(), assetPath);
@@ -189,9 +186,30 @@ void AssetExporter::onQmlFileLoaded()
     QTC_ASSERT(m_view && m_view->model(), qCDebug(loggerError) << "Null model"; return);
     qCDebug(loggerInfo) << "Qml file load done" << m_view->model()->fileUrl();
     exportComponent(m_view->rootModelNode());
+    QString error;
+    if (!m_view->saveQmlFile(&error)) {
+        ExportNotification::addError(tr("Error saving QML file. %1")
+                                     .arg(error.isEmpty()? tr("Unknown") : error));
+    }
     triggerLoadNextFile();
 }
 
+QByteArray AssetExporter::addNodeUUID(ModelNode node)
+{
+    QByteArray uuid = node.auxiliaryData(Constants::UuidTag).toByteArray();
+    qDebug() << node.id() << "UUID" << uuid;
+    if (uuid.isEmpty()) {
+        // Assign a new hash.
+        do {
+            uuid = generateHash(node.id());
+        } while (m_usedHashes.contains(uuid));
+        m_usedHashes.insert(uuid);
+        node.setAuxiliaryData(Constants::UuidAuxTag, QString::fromLatin1(uuid));
+        node.model()->rewriterView()->writeAuxiliaryData();
+    }
+    return uuid;
+}
+
 void AssetExporter::triggerLoadNextFile()
 {
     QTimer::singleShot(0, this, &AssetExporter::loadNextFile);

src/plugins/qmldesigner/assetexporterplugin/assetexporter.h

@@ -87,6 +87,8 @@ private:
 
     void onQmlFileLoaded();
 
+    QByteArray addNodeUUID(ModelNode node);
+
 private:
     mutable class State {
     public:

src/plugins/qmldesigner/assetexporterplugin/assetexporterview.cpp

@@ -62,7 +62,7 @@ bool AssetExporterView::loadQmlFile(const Utils::FilePath &path, uint timeoutSec
 
     setState(LoadState::Busy);
     m_retryCount = std::max(MinRetry, static_cast<int>((timeoutSecs * 1000) / RetryIntervalMs));
-    Core::EditorManager::openEditor(path.toString(), Core::Id(),
+    m_currentEditor = Core::EditorManager::openEditor(path.toString(), Core::Id(),
                                     Core::EditorManager::DoNotMakeVisible);
     Core::ModeManager::activateMode(Core::Constants::MODE_DESIGN);
     Core::ModeManager::setFocusToCurrentMode();
@@ -70,6 +70,15 @@ bool AssetExporterView::loadQmlFile(const Utils::FilePath &path, uint timeoutSec
     return true;
 }
 
+bool AssetExporterView::saveQmlFile(QString *error) const
+{
+    if (!m_currentEditor) {
+        qCDebug(loggerWarn) << "Saving QML file failed. No editor.";
+        return false;
+    }
+    return m_currentEditor->document()->save(error);
+}
+
 void AssetExporterView::modelAttached(Model *model)
 {
     if (model->rewriterView() && model->rewriterView()->inErrorState())

src/plugins/qmldesigner/assetexporterplugin/assetexporterview.h

@@ -54,6 +54,7 @@ public:
     AssetExporterView(QObject *parent = nullptr);
 
     bool loadQmlFile(const Utils::FilePath &path, uint timeoutSecs = 10);
+    bool saveQmlFile(QString *error) const;
 
     void modelAttached(Model *model) override;
     void instanceInformationsChanged(const QMultiHash<ModelNode, InformationName> &informationChangeHash) override;

src/plugins/qmldesigner/assetexporterplugin/assetexportpluginconstants.h

@@ -30,6 +30,7 @@ namespace Constants {
 const char EXPORT_QML[] = "Designer.ExportPlugin.ExportQml";
 
 const char TASK_CATEGORY_ASSET_EXPORT[] = "AssetExporter.Export";
+const char UuidAuxTag[] = "uuid";
 
 //***************************************************************************
 // Metadata tags