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Bug 855411 - Root ChangeDocument. r=bz,terrence
This commit is contained in:
Tom Schuster
parent
b780a1351d
commit
a3d84dfa88
@ -921,127 +921,127 @@ nsXBLBinding::UnhookEventHandlers()
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void
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nsXBLBinding::ChangeDocument(nsIDocument* aOldDocument, nsIDocument* aNewDocument)
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{
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if (aOldDocument != aNewDocument) {
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// Only style bindings get their prototypes unhooked. First do ourselves.
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if (mIsStyleBinding) {
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// Now the binding dies. Unhook our prototypes.
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if (mPrototypeBinding->HasImplementation()) {
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nsCOMPtr<nsIScriptGlobalObject> global = do_QueryInterface(
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aOldDocument->GetScopeObject());
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if (global) {
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JSObject *scope = global->GetGlobalJSObject();
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if (aOldDocument == aNewDocument)
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return;
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// Only style bindings get their prototypes unhooked. First do ourselves.
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if (mIsStyleBinding) {
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// Now the binding dies. Unhook our prototypes.
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if (mPrototypeBinding->HasImplementation()) {
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nsCOMPtr<nsIScriptGlobalObject> global = do_QueryInterface(
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aOldDocument->GetScopeObject());
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if (global) {
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nsCOMPtr<nsIScriptContext> context = global->GetContext();
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if (context) {
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JSContext *cx = context->GetNativeContext();
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nsCxPusher pusher;
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pusher.Push(cx);
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// scope might be null if we've cycle-collected the global
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// object, since the Unlink phase of cycle collection happens
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// after JS GC finalization. But in that case, we don't care
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// about fixing the prototype chain, since everything's going
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// away immediately.
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JS::Rooted<JSObject*> scope(cx, global->GetGlobalJSObject());
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JS::Rooted<JSObject*> scriptObject(cx, mBoundElement->GetWrapper());
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if (scope && scriptObject) {
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// XXX Stay in sync! What if a layered binding has an
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// <interface>?!
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// XXXbz what does that comment mean, really? It seems to date
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// back to when there was such a thing as an <interface>, whever
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// that was...
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nsCOMPtr<nsIScriptContext> context = global->GetContext();
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if (context && scope) {
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JSContext *cx = context->GetNativeContext();
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// Find the right prototype.
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JSAutoRequest ar(cx);
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JSAutoCompartment ac(cx, scriptObject);
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nsCxPusher pusher;
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pusher.Push(cx);
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JSObject* scriptObject = mBoundElement->GetWrapper();
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if (scriptObject) {
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// XXX Stay in sync! What if a layered binding has an
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// <interface>?!
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// XXXbz what does that comment mean, really? It seems to date
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// back to when there was such a thing as an <interface>, whever
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// that was...
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// Find the right prototype.
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JSObject* base = scriptObject;
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JSObject* proto;
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JSAutoRequest ar(cx);
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JSAutoCompartment ac(cx, scriptObject);
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for ( ; true; base = proto) { // Will break out on null proto
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if (!JS_GetPrototype(cx, base, &proto)) {
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return;
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}
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if (!proto) {
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break;
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}
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JSClass* clazz = ::JS_GetClass(proto);
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if (!clazz ||
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(~clazz->flags &
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(JSCLASS_HAS_PRIVATE | JSCLASS_PRIVATE_IS_NSISUPPORTS)) ||
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JSCLASS_RESERVED_SLOTS(clazz) != 1 ||
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clazz->finalize != XBLFinalize) {
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// Clearly not the right class
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continue;
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}
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nsRefPtr<nsXBLDocumentInfo> docInfo =
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static_cast<nsXBLDocumentInfo*>(::JS_GetPrivate(proto));
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if (!docInfo) {
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// Not the proto we seek
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continue;
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}
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JS::Value protoBinding = ::JS_GetReservedSlot(proto, 0);
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if (JSVAL_TO_PRIVATE(protoBinding) != mPrototypeBinding) {
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// Not the right binding
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continue;
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}
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// Alright! This is the right prototype. Pull it out of the
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// proto chain.
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JSObject* grandProto;
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if (!JS_GetPrototype(cx, proto, &grandProto)) {
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return;
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}
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::JS_SetPrototype(cx, base, grandProto);
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JS::Rooted<JSObject*> base(cx, scriptObject);
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JS::Rooted<JSObject*> proto(cx);
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for ( ; true; base = proto) { // Will break out on null proto
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if (!JS_GetPrototype(cx, base, proto.address())) {
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return;
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}
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if (!proto) {
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break;
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}
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mPrototypeBinding->UndefineFields(cx, scriptObject);
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JSClass* clazz = ::JS_GetClass(proto);
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if (!clazz ||
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(~clazz->flags &
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(JSCLASS_HAS_PRIVATE | JSCLASS_PRIVATE_IS_NSISUPPORTS)) ||
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JSCLASS_RESERVED_SLOTS(clazz) != 1 ||
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clazz->finalize != XBLFinalize) {
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// Clearly not the right class
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continue;
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}
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// Don't remove the reference from the document to the
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// wrapper here since it'll be removed by the element
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// itself when that's taken out of the document.
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nsRefPtr<nsXBLDocumentInfo> docInfo =
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static_cast<nsXBLDocumentInfo*>(::JS_GetPrivate(proto));
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if (!docInfo) {
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// Not the proto we seek
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continue;
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}
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JS::Value protoBinding = ::JS_GetReservedSlot(proto, 0);
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if (JSVAL_TO_PRIVATE(protoBinding) != mPrototypeBinding) {
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// Not the right binding
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continue;
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}
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// Alright! This is the right prototype. Pull it out of the
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// proto chain.
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JS::Rooted<JSObject*> grandProto(cx);
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if (!JS_GetPrototype(cx, proto, grandProto.address())) {
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return;
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}
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::JS_SetPrototype(cx, base, grandProto);
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break;
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}
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mPrototypeBinding->UndefineFields(cx, scriptObject);
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// Don't remove the reference from the document to the
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// wrapper here since it'll be removed by the element
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// itself when that's taken out of the document.
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}
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}
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}
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// Remove our event handlers
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UnhookEventHandlers();
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}
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{
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nsAutoScriptBlocker scriptBlocker;
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// Remove our event handlers
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UnhookEventHandlers();
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}
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// Then do our ancestors. This reverses the construction order, so that at
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// all times things are consistent as far as everyone is concerned.
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if (mNextBinding) {
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mNextBinding->ChangeDocument(aOldDocument, aNewDocument);
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}
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{
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nsAutoScriptBlocker scriptBlocker;
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// Update the anonymous content.
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// XXXbz why not only for style bindings?
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nsIContent *anonymous = mContent;
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if (anonymous) {
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// Also kill the default content within all our insertion points.
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if (mInsertionPointTable)
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mInsertionPointTable->Enumerate(ChangeDocumentForDefaultContent,
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nullptr);
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// Then do our ancestors. This reverses the construction order, so that at
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// all times things are consistent as far as everyone is concerned.
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if (mNextBinding) {
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mNextBinding->ChangeDocument(aOldDocument, aNewDocument);
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}
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nsXBLBinding::UninstallAnonymousContent(aOldDocument, anonymous);
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}
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// Update the anonymous content.
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// XXXbz why not only for style bindings?
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nsIContent *anonymous = mContent;
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if (anonymous) {
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// Also kill the default content within all our insertion points.
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if (mInsertionPointTable)
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mInsertionPointTable->Enumerate(ChangeDocumentForDefaultContent,
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nullptr);
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// Make sure that henceforth we don't claim that mBoundElement's children
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// have insertion parents in the old document.
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nsBindingManager* bindingManager = aOldDocument->BindingManager();
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for (nsIContent* child = mBoundElement->GetLastChild();
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child;
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child = child->GetPreviousSibling()) {
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bindingManager->SetInsertionParent(child, nullptr);
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}
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nsXBLBinding::UninstallAnonymousContent(aOldDocument, anonymous);
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}
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// Make sure that henceforth we don't claim that mBoundElement's children
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// have insertion parents in the old document.
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nsBindingManager* bindingManager = aOldDocument->BindingManager();
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for (nsIContent* child = mBoundElement->GetLastChild();
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child;
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child = child->GetPreviousSibling()) {
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bindingManager->SetInsertionParent(child, nullptr);
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}
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}
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}
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