Begin adding WebCore classes to bun

1 files changed, 82 insertions, 0 deletions

diff --git a/src/javascript/jsc/bindings/JSDOMGlobalObject.cpp b/src/javascript/jsc/bindings/JSDOMGlobalObject.cpp
new file mode 100644
index 000000000..98b9e9dec
--- /dev/null
+++ b/src/javascript/jsc/bindings/JSDOMGlobalObject.cpp
@@ -0,0 +1,82 @@
+#include "JSDOMGlobalObject.h"
+#include "JavaScriptCore/JSCast.h"
+#include "ZigGlobalObject.h"
+
+namespace WebCore {
+
+// static JSDOMGlobalObject& callerGlobalObject(JSC::JSGlobalObject& lexicalGlobalObject, JSC::CallFrame* callFrame, bool skipFirstFrame, bool lookUpFromVMEntryScope)
+// {
+//     VM& vm = lexicalGlobalObject.vm();
+//     if (callFrame) {
+//         class GetCallerGlobalObjectFunctor {
+//         public:
+//             GetCallerGlobalObjectFunctor(bool skipFirstFrame)
+//                 : m_skipFirstFrame(skipFirstFrame)
+//             {
+//             }
+
+//             StackVisitor::Status operator()(StackVisitor& visitor) const
+//             {
+//                 if (m_skipFirstFrame) {
+//                     if (!m_hasSkippedFirstFrame) {
+//                         m_hasSkippedFirstFrame = true;
+//                         return StackVisitor::Continue;
+//                     }
+//                 }
+
+//                 if (auto* codeBlock = visitor->codeBlock())
+//                     m_globalObject = codeBlock->globalObject();
+//                 else {
+//                     ASSERT(visitor->callee().rawPtr());
+//                     // FIXME: Callee is not an object if the caller is Web Assembly.
+//                     // Figure out what to do here. We can probably get the global object
+//                     // from the top-most Wasm Instance. https://bugs.webkit.org/show_bug.cgi?id=165721
+//                     if (visitor->callee().isCell() && visitor->callee().asCell()->isObject())
+//                         m_globalObject = jsCast<JSObject*>(visitor->callee().asCell())->globalObject();
+//                 }
+//                 return StackVisitor::Done;
+//             }
+
+//             JSC::JSGlobalObject* globalObject() const { return m_globalObject; }
+
+//         private:
+//             bool m_skipFirstFrame { false };
+//             mutable bool m_hasSkippedFirstFrame { false };
+//             mutable JSC::JSGlobalObject* m_globalObject { nullptr };
+//         };
+
+//         GetCallerGlobalObjectFunctor iter(skipFirstFrame);
+//         callFrame->iterate(vm, iter);
+//         if (iter.globalObject())
+//             return *jsCast<JSDOMGlobalObject*>(iter.globalObject());
+//     }
+
+//     // In the case of legacyActiveGlobalObjectForAccessor, it is possible that vm.topCallFrame is nullptr when the script is evaluated as JSONP.
+//     // Since we put JSGlobalObject to VMEntryScope, we can retrieve the right globalObject from that.
+//     // For callerGlobalObject, we do not check vm.entryScope to keep it the old behavior.
+//     if (lookUpFromVMEntryScope) {
+//         if (vm.entryScope) {
+//             if (auto* result = vm.entryScope->globalObject())
+//                 return *jsCast<JSDOMGlobalObject*>(result);
+//         }
+//     }
+
+//     // If we cannot find JSGlobalObject in caller frames, we just return the current lexicalGlobalObject.
+//     return *jsCast<JSDOMGlobalObject*>(&lexicalGlobalObject);
+// }
+
+// JSDOMGlobalObject& callerGlobalObject(JSC::JSGlobalObject& lexicalGlobalObject, JSC::CallFrame* callFrame)
+// {
+//     constexpr bool skipFirstFrame = true;
+//     constexpr bool lookUpFromVMEntryScope = false;
+//     return callerGlobalObject(lexicalGlobalObject, callFrame, skipFirstFrame, lookUpFromVMEntryScope);
+// }
+
+// JSDOMGlobalObject& legacyActiveGlobalObjectForAccessor(JSC::JSGlobalObject& lexicalGlobalObject, JSC::CallFrame* callFrame)
+// {
+//     constexpr bool skipFirstFrame = false;
+//     constexpr bool lookUpFromVMEntryScope = true;
+//     return callerGlobalObject(lexicalGlobalObject, callFrame, skipFirstFrame, lookUpFromVMEntryScope);
+// }
+
+}
\ No newline at end of file