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https://github.com/mozilla/gecko-dev.git
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e74f1cd513
In order to facilitate the movement of code with side-effects called by Element::SetAttr to Element::BeforeSetAttr and Element::AfterSetAttr, Element::AfterSetAttr should have access to the old value of the attribute. This includes information about whether there was previously a value set or not. Accomplishing this involved passing an additional argument through functions that find and change the old attribute value in order to ensure that we can differentiate between an empty old value and an absent old value (attribute was not set). Note that while I tried to ensure that accurate values (and their absence) are reported to Element::AfterSetAttr, I largely ignored SVG. While the old value reported for SVG values should be however accurate the value already being reported to SetAttrAndNotify was, SVG elements do not currently report unset values properly because they will never pass a null pointer to SetAttrAndNotify. MozReview-Commit-ID: K1mha8CNFZP --HG-- extra : rebase_source : 42776eb01451d371e4aebcc17fe3dd112c8d268b
557 lines
16 KiB
C++
557 lines
16 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsGenericHTMLFrameElement.h"
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#include "mozilla/dom/BrowserElementAudioChannel.h"
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#include "mozilla/dom/ContentChild.h"
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#include "mozilla/dom/HTMLIFrameElement.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/ErrorResult.h"
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#include "GeckoProfiler.h"
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#include "nsAttrValueInlines.h"
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#include "nsContentUtils.h"
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#include "nsIDocShell.h"
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#include "nsIDOMDocument.h"
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#include "nsIFrame.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsIPermissionManager.h"
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#include "nsIPresShell.h"
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#include "nsIScrollable.h"
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#include "nsPresContext.h"
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#include "nsServiceManagerUtils.h"
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#include "nsSubDocumentFrame.h"
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#include "nsXULElement.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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NS_IMPL_CYCLE_COLLECTION_CLASS(nsGenericHTMLFrameElement)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(nsGenericHTMLFrameElement,
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nsGenericHTMLElement)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFrameLoader)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOpenerWindow)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mBrowserElementAPI)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mBrowserElementAudioChannels)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(nsGenericHTMLFrameElement,
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nsGenericHTMLElement)
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if (tmp->mFrameLoader) {
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tmp->mFrameLoader->Destroy();
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}
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mFrameLoader)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mOpenerWindow)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mBrowserElementAPI)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mBrowserElementAudioChannels)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_ADDREF_INHERITED(nsGenericHTMLFrameElement, nsGenericHTMLElement)
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NS_IMPL_RELEASE_INHERITED(nsGenericHTMLFrameElement, nsGenericHTMLElement)
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NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(nsGenericHTMLFrameElement)
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NS_INTERFACE_TABLE_INHERITED(nsGenericHTMLFrameElement,
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nsIFrameLoaderOwner,
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nsIDOMMozBrowserFrame,
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nsIMozBrowserFrame)
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NS_INTERFACE_TABLE_TAIL_INHERITING(nsGenericHTMLElement)
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NS_IMPL_BOOL_ATTR(nsGenericHTMLFrameElement, Mozbrowser, mozbrowser)
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int32_t
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nsGenericHTMLFrameElement::TabIndexDefault()
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{
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return 0;
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}
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nsGenericHTMLFrameElement::~nsGenericHTMLFrameElement()
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{
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if (mFrameLoader) {
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mFrameLoader->Destroy();
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}
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}
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nsresult
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nsGenericHTMLFrameElement::GetContentDocument(nsIDOMDocument** aContentDocument)
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{
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NS_PRECONDITION(aContentDocument, "Null out param");
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nsCOMPtr<nsIDOMDocument> document =
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do_QueryInterface(GetContentDocument(*nsContentUtils::SubjectPrincipal()));
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document.forget(aContentDocument);
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return NS_OK;
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}
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nsIDocument*
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nsGenericHTMLFrameElement::GetContentDocument(nsIPrincipal& aSubjectPrincipal)
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{
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nsCOMPtr<nsPIDOMWindowOuter> win = GetContentWindow();
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if (!win) {
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return nullptr;
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}
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nsIDocument *doc = win->GetDoc();
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if (!doc) {
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return nullptr;
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}
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// Return null for cross-origin contentDocument.
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if (!aSubjectPrincipal.SubsumesConsideringDomain(doc->NodePrincipal())) {
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return nullptr;
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}
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return doc;
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}
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already_AddRefed<nsPIDOMWindowOuter>
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nsGenericHTMLFrameElement::GetContentWindow()
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{
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EnsureFrameLoader();
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if (!mFrameLoader) {
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return nullptr;
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}
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bool depthTooGreat = false;
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mFrameLoader->GetDepthTooGreat(&depthTooGreat);
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if (depthTooGreat) {
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// Claim to have no contentWindow
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return nullptr;
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}
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nsCOMPtr<nsIDocShell> doc_shell;
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mFrameLoader->GetDocShell(getter_AddRefs(doc_shell));
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if (!doc_shell) {
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return nullptr;
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}
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nsCOMPtr<nsPIDOMWindowOuter> win = doc_shell->GetWindow();
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if (!win) {
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return nullptr;
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}
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NS_ASSERTION(win->IsOuterWindow(),
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"Uh, this window should always be an outer window!");
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return win.forget();
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}
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void
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nsGenericHTMLFrameElement::EnsureFrameLoader()
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{
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if (!IsInComposedDoc() || mFrameLoader || mFrameLoaderCreationDisallowed) {
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// If frame loader is there, we just keep it around, cached
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return;
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}
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// Strangely enough, this method doesn't actually ensure that the
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// frameloader exists. It's more of a best-effort kind of thing.
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mFrameLoader = nsFrameLoader::Create(this,
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nsPIDOMWindowOuter::From(mOpenerWindow),
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mNetworkCreated);
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if (mIsPrerendered) {
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mFrameLoader->SetIsPrerendered();
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}
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}
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nsresult
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nsGenericHTMLFrameElement::CreateRemoteFrameLoader(nsITabParent* aTabParent)
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{
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MOZ_ASSERT(!mFrameLoader);
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EnsureFrameLoader();
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NS_ENSURE_STATE(mFrameLoader);
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mFrameLoader->SetRemoteBrowser(aTabParent);
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if (nsSubDocumentFrame* subdocFrame = do_QueryFrame(GetPrimaryFrame())) {
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// The reflow for this element already happened while we were waiting
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// for the iframe creation. Therefore the subdoc frame didn't have a
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// frameloader when UpdatePositionAndSize was supposed to be called in
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// ReflowFinished, and we need to do it properly now.
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mFrameLoader->UpdatePositionAndSize(subdocFrame);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsGenericHTMLFrameElement::GetFrameLoaderXPCOM(nsIFrameLoader **aFrameLoader)
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{
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NS_IF_ADDREF(*aFrameLoader = mFrameLoader);
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return NS_OK;
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}
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NS_IMETHODIMP_(already_AddRefed<nsFrameLoader>)
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nsGenericHTMLFrameElement::GetFrameLoader()
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{
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RefPtr<nsFrameLoader> loader = mFrameLoader;
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return loader.forget();
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}
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void
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nsGenericHTMLFrameElement::PresetOpenerWindow(mozIDOMWindowProxy* aWindow, ErrorResult& aRv)
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{
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MOZ_ASSERT(!mFrameLoader);
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mOpenerWindow = nsPIDOMWindowOuter::From(aWindow);
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}
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void
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nsGenericHTMLFrameElement::InternalSetFrameLoader(nsIFrameLoader* aNewFrameLoader)
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{
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mFrameLoader = static_cast<nsFrameLoader*>(aNewFrameLoader);
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}
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void
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nsGenericHTMLFrameElement::SwapFrameLoaders(HTMLIFrameElement& aOtherLoaderOwner,
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ErrorResult& rv)
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{
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if (&aOtherLoaderOwner == this) {
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// nothing to do
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return;
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}
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aOtherLoaderOwner.SwapFrameLoaders(this, rv);
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}
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void
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nsGenericHTMLFrameElement::SwapFrameLoaders(nsXULElement& aOtherLoaderOwner,
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ErrorResult& rv)
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{
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aOtherLoaderOwner.SwapFrameLoaders(this, rv);
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}
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void
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nsGenericHTMLFrameElement::SwapFrameLoaders(nsIFrameLoaderOwner* aOtherLoaderOwner,
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mozilla::ErrorResult& rv)
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{
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RefPtr<nsFrameLoader> loader = GetFrameLoader();
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RefPtr<nsFrameLoader> otherLoader = aOtherLoaderOwner->GetFrameLoader();
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if (!loader || !otherLoader) {
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rv.Throw(NS_ERROR_NOT_IMPLEMENTED);
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return;
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}
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rv = loader->SwapWithOtherLoader(otherLoader, this, aOtherLoaderOwner);
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}
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NS_IMETHODIMP
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nsGenericHTMLFrameElement::SetIsPrerendered()
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{
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MOZ_ASSERT(!mFrameLoader, "Please call SetIsPrerendered before frameLoader is created");
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mIsPrerendered = true;
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return NS_OK;
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}
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nsresult
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nsGenericHTMLFrameElement::LoadSrc()
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{
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EnsureFrameLoader();
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if (!mFrameLoader) {
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return NS_OK;
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}
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nsresult rv = mFrameLoader->LoadFrame();
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#ifdef DEBUG
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if (NS_FAILED(rv)) {
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NS_WARNING("failed to load URL");
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}
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#endif
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return rv;
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}
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nsresult
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nsGenericHTMLFrameElement::BindToTree(nsIDocument* aDocument,
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nsIContent* aParent,
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nsIContent* aBindingParent,
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bool aCompileEventHandlers)
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{
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nsresult rv = nsGenericHTMLElement::BindToTree(aDocument, aParent,
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aBindingParent,
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aCompileEventHandlers);
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NS_ENSURE_SUCCESS(rv, rv);
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if (IsInComposedDoc()) {
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NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
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"Missing a script blocker!");
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PROFILER_LABEL("nsGenericHTMLFrameElement", "BindToTree",
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js::ProfileEntry::Category::OTHER);
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// We're in a document now. Kick off the frame load.
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LoadSrc();
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}
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// We're now in document and scripts may move us, so clear
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// the mNetworkCreated flag.
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mNetworkCreated = false;
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return rv;
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}
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void
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nsGenericHTMLFrameElement::UnbindFromTree(bool aDeep, bool aNullParent)
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{
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if (mFrameLoader) {
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// This iframe is being taken out of the document, destroy the
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// iframe's frame loader (doing that will tear down the window in
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// this iframe).
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// XXXbz we really want to only partially destroy the frame
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// loader... we don't want to tear down the docshell. Food for
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// later bug.
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mFrameLoader->Destroy();
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mFrameLoader = nullptr;
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}
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nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
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}
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nsresult
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nsGenericHTMLFrameElement::SetAttr(int32_t aNameSpaceID, nsIAtom* aName,
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nsIAtom* aPrefix, const nsAString& aValue,
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bool aNotify)
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{
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nsresult rv = nsGenericHTMLElement::SetAttr(aNameSpaceID, aName, aPrefix,
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aValue, aNotify);
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NS_ENSURE_SUCCESS(rv, rv);
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if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::src &&
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(!IsHTMLElement(nsGkAtoms::iframe) ||
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!HasAttr(kNameSpaceID_None,nsGkAtoms::srcdoc))) {
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// Don't propagate error here. The attribute was successfully set, that's
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// what we should reflect.
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LoadSrc();
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} else if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::name) {
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// Propagate "name" to the docshell to make browsing context names live,
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// per HTML5.
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nsIDocShell *docShell = mFrameLoader ? mFrameLoader->GetExistingDocShell()
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: nullptr;
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if (docShell) {
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docShell->SetName(aValue);
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}
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}
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return NS_OK;
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}
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nsresult
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nsGenericHTMLFrameElement::UnsetAttr(int32_t aNameSpaceID, nsIAtom* aAttribute,
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bool aNotify)
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{
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// Invoke on the superclass.
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nsresult rv = nsGenericHTMLElement::UnsetAttr(aNameSpaceID, aAttribute, aNotify);
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NS_ENSURE_SUCCESS(rv, rv);
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if (aNameSpaceID == kNameSpaceID_None && aAttribute == nsGkAtoms::name) {
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// Propagate "name" to the docshell to make browsing context names live,
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// per HTML5.
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nsIDocShell *docShell = mFrameLoader ? mFrameLoader->GetExistingDocShell()
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: nullptr;
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if (docShell) {
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docShell->SetName(EmptyString());
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}
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}
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return NS_OK;
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}
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/* static */ int32_t
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nsGenericHTMLFrameElement::MapScrollingAttribute(const nsAttrValue* aValue)
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{
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int32_t mappedValue = nsIScrollable::Scrollbar_Auto;
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if (aValue && aValue->Type() == nsAttrValue::eEnum) {
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switch (aValue->GetEnumValue()) {
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case NS_STYLE_FRAME_OFF:
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case NS_STYLE_FRAME_NOSCROLL:
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case NS_STYLE_FRAME_NO:
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mappedValue = nsIScrollable::Scrollbar_Never;
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break;
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}
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}
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return mappedValue;
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}
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static bool
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PrincipalAllowsBrowserFrame(nsIPrincipal* aPrincipal)
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{
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nsCOMPtr<nsIPermissionManager> permMgr = mozilla::services::GetPermissionManager();
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NS_ENSURE_TRUE(permMgr, false);
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uint32_t permission = nsIPermissionManager::DENY_ACTION;
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nsresult rv = permMgr->TestPermissionFromPrincipal(aPrincipal, "browser", &permission);
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NS_ENSURE_SUCCESS(rv, false);
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return permission == nsIPermissionManager::ALLOW_ACTION;
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}
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/* virtual */ nsresult
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nsGenericHTMLFrameElement::AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
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const nsAttrValue* aValue,
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const nsAttrValue* aOldValue, bool aNotify)
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{
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if (aName == nsGkAtoms::scrolling && aNameSpaceID == kNameSpaceID_None) {
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if (mFrameLoader) {
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nsIDocShell* docshell = mFrameLoader->GetExistingDocShell();
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nsCOMPtr<nsIScrollable> scrollable = do_QueryInterface(docshell);
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if (scrollable) {
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int32_t cur;
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scrollable->GetDefaultScrollbarPreferences(nsIScrollable::ScrollOrientation_X, &cur);
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int32_t val = MapScrollingAttribute(aValue);
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if (cur != val) {
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scrollable->SetDefaultScrollbarPreferences(nsIScrollable::ScrollOrientation_X, val);
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scrollable->SetDefaultScrollbarPreferences(nsIScrollable::ScrollOrientation_Y, val);
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RefPtr<nsPresContext> presContext;
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docshell->GetPresContext(getter_AddRefs(presContext));
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nsIPresShell* shell = presContext ? presContext->GetPresShell() : nullptr;
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nsIFrame* rootScroll = shell ? shell->GetRootScrollFrame() : nullptr;
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if (rootScroll) {
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shell->FrameNeedsReflow(rootScroll, nsIPresShell::eStyleChange,
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NS_FRAME_IS_DIRTY);
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}
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}
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}
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}
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}
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if (aName == nsGkAtoms::mozbrowser && aNameSpaceID == kNameSpaceID_None) {
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mReallyIsBrowser = !!aValue && BrowserFramesEnabled() &&
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PrincipalAllowsBrowserFrame(NodePrincipal());
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}
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return nsGenericHTMLElement::AfterSetAttr(aNameSpaceID, aName, aValue,
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aOldValue, aNotify);
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}
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void
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nsGenericHTMLFrameElement::DestroyContent()
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{
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if (mFrameLoader) {
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mFrameLoader->Destroy();
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mFrameLoader = nullptr;
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}
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nsGenericHTMLElement::DestroyContent();
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}
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nsresult
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nsGenericHTMLFrameElement::CopyInnerTo(Element* aDest,
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bool aPreallocateChildren)
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{
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nsresult rv = nsGenericHTMLElement::CopyInnerTo(aDest, aPreallocateChildren);
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NS_ENSURE_SUCCESS(rv, rv);
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nsIDocument* doc = aDest->OwnerDoc();
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if (doc->IsStaticDocument() && mFrameLoader) {
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nsGenericHTMLFrameElement* dest =
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static_cast<nsGenericHTMLFrameElement*>(aDest);
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nsFrameLoader* fl = nsFrameLoader::Create(dest, nullptr, false);
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NS_ENSURE_STATE(fl);
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dest->mFrameLoader = fl;
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static_cast<nsFrameLoader*>(mFrameLoader.get())->CreateStaticClone(fl);
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}
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return rv;
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}
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bool
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nsGenericHTMLFrameElement::IsHTMLFocusable(bool aWithMouse,
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bool *aIsFocusable,
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int32_t *aTabIndex)
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{
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if (nsGenericHTMLElement::IsHTMLFocusable(aWithMouse, aIsFocusable, aTabIndex)) {
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return true;
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}
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*aIsFocusable = nsContentUtils::IsSubDocumentTabbable(this);
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if (!*aIsFocusable && aTabIndex) {
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*aTabIndex = -1;
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}
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return false;
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}
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static bool sMozBrowserFramesEnabled = false;
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#ifdef DEBUG
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static bool sBoolVarCacheInitialized = false;
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#endif
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void
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nsGenericHTMLFrameElement::InitStatics()
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{
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MOZ_ASSERT(!sBoolVarCacheInitialized);
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MOZ_ASSERT(NS_IsMainThread());
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Preferences::AddBoolVarCache(&sMozBrowserFramesEnabled,
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"dom.mozBrowserFramesEnabled");
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#ifdef DEBUG
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sBoolVarCacheInitialized = true;
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#endif
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}
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bool
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nsGenericHTMLFrameElement::BrowserFramesEnabled()
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{
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MOZ_ASSERT(sBoolVarCacheInitialized);
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return sMozBrowserFramesEnabled;
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}
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/**
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* Return true if this frame element really is a mozbrowser. (It
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* needs to have the right attributes, and its creator must have the right
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* permissions.)
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*/
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/* [infallible] */ nsresult
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nsGenericHTMLFrameElement::GetReallyIsBrowser(bool *aOut)
|
|
{
|
|
*aOut = mReallyIsBrowser;
|
|
return NS_OK;
|
|
}
|
|
|
|
/* [infallible] */ NS_IMETHODIMP
|
|
nsGenericHTMLFrameElement::GetIsolated(bool *aOut)
|
|
{
|
|
*aOut = true;
|
|
|
|
if (!nsContentUtils::IsSystemPrincipal(NodePrincipal())) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// Isolation is only disabled if the attribute is present
|
|
*aOut = !HasAttr(kNameSpaceID_None, nsGkAtoms::noisolation);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsGenericHTMLFrameElement::DisallowCreateFrameLoader()
|
|
{
|
|
MOZ_ASSERT(!mFrameLoader);
|
|
MOZ_ASSERT(!mFrameLoaderCreationDisallowed);
|
|
mFrameLoaderCreationDisallowed = true;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsGenericHTMLFrameElement::AllowCreateFrameLoader()
|
|
{
|
|
MOZ_ASSERT(!mFrameLoader);
|
|
MOZ_ASSERT(mFrameLoaderCreationDisallowed);
|
|
mFrameLoaderCreationDisallowed = false;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsGenericHTMLFrameElement::InitializeBrowserAPI()
|
|
{
|
|
MOZ_ASSERT(mFrameLoader);
|
|
InitBrowserElementAPI();
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsGenericHTMLFrameElement::DestroyBrowserFrameScripts()
|
|
{
|
|
MOZ_ASSERT(mFrameLoader);
|
|
DestroyBrowserElementFrameScripts();
|
|
return NS_OK;
|
|
}
|