From cbd0649e3becd5712183d6a3d4f4f0629a12c80d Mon Sep 17 00:00:00 2001
From: Tim Jenssen <tim.jenssen@qt.io>
Date: Mon, 18 May 2020 23:39:18 +0200
Subject: [PATCH] qmlpuppet: enable the use of multilanguage database

Change-Id: I2277348ac1e6b5025e75c640da83da30294c9d10
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
---
 .../instances/nodeinstanceserver.cpp          | 20 +++++++++-
 .../qml2puppet/instances/nodeinstanceserver.h | 39 +++++++++++++++++++
 .../qml/qmlpuppet/qml2puppet/qml2puppet.pri   |  7 ++++
 .../designercore/instances/puppetcreator.cpp  | 17 ++++++++
 .../designercore/instances/puppetcreator.h    |  1 +
 5 files changed, 82 insertions(+), 2 deletions(-)

diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp
index 0bfa289769d..561076d080b 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp
@@ -69,6 +69,7 @@
 #include <changeselectioncommand.h>
 #include <inputeventcommand.h>
 #include <view3dactioncommand.h>
+#include <changelanguagecommand.h>
 
 #include <QDebug>
 #include <QQmlEngine>
@@ -1397,7 +1398,22 @@ void NodeInstanceServer::view3DAction(const View3DActionCommand &command)
     Q_UNUSED(command)
 }
 
-void NodeInstanceServer::changeLanguage(const ChangeLanguageCommand &) {}
+void NodeInstanceServer::changeLanguage(const ChangeLanguageCommand &command)
+{
+    static QPointer<MultiLanguage::Translator> multilanguageTranslator;
+    if (!MultiLanguage::databaseFilePath().isEmpty()) {
+        if (!multilanguageLink) {
+            multilanguageLink = std::make_unique<MultiLanguage::Link>();
+            multilanguageTranslator = multilanguageLink->translator().release();
+            QCoreApplication::installTranslator(multilanguageTranslator);
+        }
+        if (multilanguageTranslator)
+            multilanguageTranslator->setLanguage(command.language);
+    }
+    QEvent ev(QEvent::LanguageChange);
+    QCoreApplication::sendEvent(QCoreApplication::instance(), &ev);
+    engine()->retranslate();
+}
 
-void NodeInstanceServer::changePreviewImageSize(const ChangePreviewImageSizeCommand &command) {}
+void NodeInstanceServer::changePreviewImageSize(const ChangePreviewImageSizeCommand &) {}
 } // namespace QmlDesigner
diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.h b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.h
index fe1d767c88a..cecef865412 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.h
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.h
@@ -31,6 +31,13 @@
 #include <QStringList>
 #include <QPointer>
 
+#ifdef MULTILANGUAGE_TRANSLATIONPROVIDER
+#include <multilanguagelink.h>
+#endif
+
+#include <QTranslator>
+#include <memory>
+
 #include <nodeinstanceserverinterface.h>
 #include "servernodeinstance.h"
 #include "debugoutputcommand.h"
@@ -47,6 +54,37 @@ QList<T>toList(const QSet<T> &set)
 }
 } //QtHelpers
 
+#ifndef MULTILANGUAGE_TRANSLATIONPROVIDER
+namespace MultiLanguage {
+static QByteArray databaseFilePath()
+{
+    return {};
+}
+
+class Translator : public QTranslator
+{
+public:
+    void setLanguage(const QString&) {}
+};
+
+class Link
+{
+public:
+    Link()
+    {
+        if (qEnvironmentVariableIsSet("QT_MULTILANGUAGE_DATABASE"))
+            qWarning() << "QT_MULTILANGUAGE_DATABASE is set but QQmlDebugTranslationService is without MULTILANGUAGE_TRANSLATIONPROVIDER support compiled.";
+    }
+    std::unique_ptr<MultiLanguage::Translator> translator() {
+        //should never be called
+        Q_ASSERT(false);
+        return std::make_unique<MultiLanguage::Translator>();
+    }
+    const bool isActivated = false;
+};
+} //namespace MultiLanguage
+#endif
+
 QT_BEGIN_NAMESPACE
 class QFileSystemWatcher;
 class QQmlView;
@@ -250,6 +288,7 @@ private:
     QPointer<QObject> m_dummyContextObject;
     QPointer<QQmlComponent> m_importComponent;
     QPointer<QObject> m_importComponentObject;
+    std::unique_ptr<MultiLanguage::Link> multilanguageLink;
 };
 
 }
diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/qml2puppet.pri b/share/qtcreator/qml/qmlpuppet/qml2puppet/qml2puppet.pri
index b8013102767..a2b3219327b 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/qml2puppet.pri
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/qml2puppet.pri
@@ -5,6 +5,13 @@ CONFIG += c++11
 
 DEFINES -= QT_CREATOR
 
+# This .pri file contains classes to enable a special multilanguage translator debug service
+MULTILANGUAGE_SUPPORT_PRI=$$(MULTILANGUAGE_SUPPORT_PRI)
+!isEmpty(MULTILANGUAGE_SUPPORT_PRI) {
+    include($$(MULTILANGUAGE_SUPPORT_PRI))
+    DEFINES += MULTILANGUAGE_TRANSLATIONPROVIDER
+}
+
 include (editor3d/editor3d.pri)
 include (../instances/instances.pri)
 include (instances/instances.pri)
diff --git a/src/plugins/qmldesigner/designercore/instances/puppetcreator.cpp b/src/plugins/qmldesigner/designercore/instances/puppetcreator.cpp
index 6e6660a5cbb..a33d7f1f5a0 100644
--- a/src/plugins/qmldesigner/designercore/instances/puppetcreator.cpp
+++ b/src/plugins/qmldesigner/designercore/instances/puppetcreator.cpp
@@ -162,6 +162,18 @@ QString PuppetCreator::getStyleConfigFileName() const
     return QString();
 }
 
+QString PuppetCreator::getMultilanguageDatabaseFilePath() const
+{
+#ifndef QMLDESIGNER_TEST
+    if (m_target) {
+        auto filePath = m_target->project()->projectDirectory().pathAppended("/multilanguage-experimental-v1.db");
+        if (filePath.exists())
+            return filePath.toString();
+    }
+#endif
+    return {};
+}
+
 PuppetCreator::PuppetCreator(ProjectExplorer::Target *target, const Model *model)
 
     : m_target(target)
@@ -482,6 +494,11 @@ QProcessEnvironment PuppetCreator::processEnvironment() const
         environment.set("QMLDESIGNER_RC_PATHS", m_qrcMapping);
     }
 
+    const QString multilanguageDatabaseFilePath = getMultilanguageDatabaseFilePath();
+
+    if (!multilanguageDatabaseFilePath.isEmpty())
+        environment.set("QT_MULTILANGUAGE_DATABASE", multilanguageDatabaseFilePath);
+
 #ifndef QMLDESIGNER_TEST
     auto view = QmlDesignerPlugin::instance()->viewManager().nodeInstanceView();
     view->emitCustomNotification("PuppetStatus", {}, {QVariant(m_qrcMapping)});
diff --git a/src/plugins/qmldesigner/designercore/instances/puppetcreator.h b/src/plugins/qmldesigner/designercore/instances/puppetcreator.h
index bafea8fa3e6..f8033fd3e19 100644
--- a/src/plugins/qmldesigner/designercore/instances/puppetcreator.h
+++ b/src/plugins/qmldesigner/designercore/instances/puppetcreator.h
@@ -102,6 +102,7 @@ protected:
 
     bool useOnlyFallbackPuppet() const;
     QString getStyleConfigFileName() const;
+    QString getMultilanguageDatabaseFilePath() const;
 
 private:
     mutable QString m_compileLog;