Add extension API to QJSEngine

This allows users in a JavaScript-only environment to install extensions including:

- Translation functions (qsTr(), etc.)
- The console object (console.log(), print(), etc.)
- Garbage collection functions (gc())

This deprecates installTranslatorFunctions(). This API results in less
clutter in the API, as we'd otherwise need to have several functions
for each type of extension.

[ChangeLog][QJSEngine] Introduced an extension API that allows
installing various function and object extensions (qsTr(),
console.log(), etc.) to QJSEngine.
[ChangeLog][QJSEngine] installTranslatorFunctions() was deprecated in
favor of the new extension API (see installExtensions()).

Change-Id: I4d6eb2097c3eda6810e967b2e8f6441c28c91a16
Task-number: QTBUG-40772
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/src/qml/qml/v8/qv8engine.cpp b/src/qml/qml/v8/qv8engine.cpp
index effc37a0eb..dae932e705 100644
--- a/src/qml/qml/v8/qv8engine.cpp
+++ b/src/qml/qml/v8/qv8engine.cpp
@@ -174,7 +174,10 @@ const QSet<QString> &QV8Engine::illegalNames() const
 void QV8Engine::initializeGlobal()
 {
     QV4::Scope scope(m_v4Engine);
-    QV4::GlobalExtensions::init(m_engine, m_v4Engine->globalObject);
+    QV4::GlobalExtensions::init(m_v4Engine->globalObject, QJSEngine::AllExtensions);
+
+    QV4::ScopedObject qt(scope, m_v4Engine->memoryManager->allocObject<QV4::QtObject>(m_engine));
+    m_v4Engine->globalObject->defineDefaultProperty(QStringLiteral("Qt"), qt);
 
     QQmlLocale::registerStringLocaleCompare(m_v4Engine);
     QQmlDateExtension::registerExtension(m_v4Engine);