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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsGenericHTMLFrameElement.h"
#include "mozilla/dom/HTMLIFrameElement.h"
#include "mozilla/dom/XULFrameElement.h"
#include "mozilla/dom/BrowserBridgeChild.h"
#include "mozilla/dom/WindowProxyHolder.h"
#include "mozilla/Preferences.h"
#include "mozilla/PresShell.h"
#include "mozilla/StaticPrefs_dom.h"
#include "mozilla/ErrorResult.h"
#include "GeckoProfiler.h"
#include "nsAttrValueInlines.h"
#include "nsContentUtils.h"
#include "nsIDocShell.h"
#include "nsIFrame.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIPermissionManager.h"
#include "nsPresContext.h"
#include "nsServiceManagerUtils.h"
#include "nsSubDocumentFrame.h"
#include "nsAttrValueOrString.h"
using namespace mozilla;
using namespace mozilla::dom;
NS_IMPL_CYCLE_COLLECTION_CLASS(nsGenericHTMLFrameElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(nsGenericHTMLFrameElement,
nsGenericHTMLElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFrameLoader)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mBrowserElementAPI)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(nsGenericHTMLFrameElement,
nsGenericHTMLElement)
if (tmp->mFrameLoader) {
tmp->mFrameLoader->Destroy();
}
NS_IMPL_CYCLE_COLLECTION_UNLINK(mFrameLoader)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mBrowserElementAPI)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(
nsGenericHTMLFrameElement, nsGenericHTMLElement, nsFrameLoaderOwner,
nsIDOMMozBrowserFrame, nsIMozBrowserFrame, nsGenericHTMLFrameElement)
NS_IMETHODIMP
nsGenericHTMLFrameElement::GetMozbrowser(bool* aValue) {
*aValue = GetBoolAttr(nsGkAtoms::mozbrowser);
return NS_OK;
}
NS_IMETHODIMP
nsGenericHTMLFrameElement::SetMozbrowser(bool aValue) {
return SetBoolAttr(nsGkAtoms::mozbrowser, aValue);
}
int32_t nsGenericHTMLFrameElement::TabIndexDefault() { return 0; }
nsGenericHTMLFrameElement::~nsGenericHTMLFrameElement() {
if (mFrameLoader) {
mFrameLoader->Destroy();
}
}
Document* nsGenericHTMLFrameElement::GetContentDocument(
nsIPrincipal& aSubjectPrincipal) {
RefPtr<BrowsingContext> bc = GetContentWindowInternal();
if (!bc) {
return nullptr;
}
nsPIDOMWindowOuter* window = bc->GetDOMWindow();
if (!window) {
// Either our browsing context contents are out-of-process (in which case
// clearly this is a cross-origin call and we should return null), or our
// browsing context is torn-down enough to no longer have a window or a
// document, and we should still return null.
return nullptr;
}
Document* doc = window->GetDoc();
if (!doc) {
return nullptr;
}
// Return null for cross-origin contentDocument.
if (!aSubjectPrincipal.SubsumesConsideringDomain(doc->NodePrincipal())) {
return nullptr;
}
return doc;
}
BrowsingContext* nsGenericHTMLFrameElement::GetContentWindowInternal() {
EnsureFrameLoader();
if (!mFrameLoader) {
return nullptr;
}
if (mFrameLoader->DepthTooGreat()) {
// Claim to have no contentWindow
return nullptr;
}
RefPtr<BrowsingContext> bc = mFrameLoader->GetBrowsingContext();
return bc;
}
Nullable<WindowProxyHolder> nsGenericHTMLFrameElement::GetContentWindow() {
RefPtr<BrowsingContext> bc = GetContentWindowInternal();
if (!bc) {
return nullptr;
}
return WindowProxyHolder(bc);
}
void nsGenericHTMLFrameElement::EnsureFrameLoader() {
if (!IsInComposedDoc() || mFrameLoader || OwnerDoc()->IsStaticDocument()) {
// If frame loader is there, we just keep it around, cached
return;
}
// Strangely enough, this method doesn't actually ensure that the
// frameloader exists. It's more of a best-effort kind of thing.
mFrameLoader = nsFrameLoader::Create(this, mNetworkCreated);
}
void nsGenericHTMLFrameElement::SwapFrameLoaders(
HTMLIFrameElement& aOtherLoaderOwner, ErrorResult& rv) {
if (&aOtherLoaderOwner == this) {
// nothing to do
return;
}
aOtherLoaderOwner.SwapFrameLoaders(this, rv);
}
void nsGenericHTMLFrameElement::SwapFrameLoaders(
XULFrameElement& aOtherLoaderOwner, ErrorResult& rv) {
aOtherLoaderOwner.SwapFrameLoaders(this, rv);
}
void nsGenericHTMLFrameElement::SwapFrameLoaders(
nsFrameLoaderOwner* aOtherLoaderOwner, mozilla::ErrorResult& rv) {
if (RefPtr<Document> doc = GetComposedDoc()) {
// SwapWithOtherLoader relies on frames being up-to-date.
doc->FlushPendingNotifications(FlushType::Frames);
}
RefPtr<nsFrameLoader> loader = GetFrameLoader();
RefPtr<nsFrameLoader> otherLoader = aOtherLoaderOwner->GetFrameLoader();
if (!loader || !otherLoader) {
rv.Throw(NS_ERROR_NOT_IMPLEMENTED);
return;
}
rv = loader->SwapWithOtherLoader(otherLoader, this, aOtherLoaderOwner);
}
void nsGenericHTMLFrameElement::LoadSrc() {
EnsureFrameLoader();
if (!mFrameLoader) {
return;
}
bool origSrc = !mSrcLoadHappened;
mSrcLoadHappened = true;
mFrameLoader->LoadFrame(origSrc);
}
nsresult nsGenericHTMLFrameElement::BindToTree(BindContext& aContext,
nsINode& aParent) {
nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent);
NS_ENSURE_SUCCESS(rv, rv);
if (IsInComposedDoc()) {
NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
"Missing a script blocker!");
AUTO_PROFILER_LABEL("nsGenericHTMLFrameElement::BindToTree", OTHER);
// We're in a document now. Kick off the frame load.
LoadSrc();
}
// We're now in document and scripts may move us, so clear
// the mNetworkCreated flag.
mNetworkCreated = false;
return rv;
}
void nsGenericHTMLFrameElement::UnbindFromTree(bool aNullParent) {
if (mFrameLoader) {
// This iframe is being taken out of the document, destroy the
// iframe's frame loader (doing that will tear down the window in
// this iframe).
// XXXbz we really want to only partially destroy the frame
// loader... we don't want to tear down the docshell. Food for
// later bug.
mFrameLoader->Destroy();
mFrameLoader = nullptr;
}
nsGenericHTMLElement::UnbindFromTree(aNullParent);
}
/* static */
ScrollbarPreference nsGenericHTMLFrameElement::MapScrollingAttribute(
const nsAttrValue* aValue) {
if (aValue && aValue->Type() == nsAttrValue::eEnum) {
switch (aValue->GetEnumValue()) {
case NS_STYLE_FRAME_OFF:
case NS_STYLE_FRAME_NOSCROLL:
case NS_STYLE_FRAME_NO:
return ScrollbarPreference::Never;
}
}
return ScrollbarPreference::Auto;
}
/* virtual */
nsresult nsGenericHTMLFrameElement::AfterSetAttr(
int32_t aNameSpaceID, nsAtom* aName, const nsAttrValue* aValue,
const nsAttrValue* aOldValue, nsIPrincipal* aMaybeScriptedPrincipal,
bool aNotify) {
if (aValue) {
nsAttrValueOrString value(aValue);
AfterMaybeChangeAttr(aNameSpaceID, aName, &value, aMaybeScriptedPrincipal,
aNotify);
} else {
AfterMaybeChangeAttr(aNameSpaceID, aName, nullptr, aMaybeScriptedPrincipal,
aNotify);
}
if (aNameSpaceID == kNameSpaceID_None) {
if (aName == nsGkAtoms::scrolling) {
if (mFrameLoader) {
ScrollbarPreference pref = MapScrollingAttribute(aValue);
if (nsIDocShell* docshell = mFrameLoader->GetExistingDocShell()) {
nsDocShell::Cast(docshell)->SetScrollbarPreference(pref);
} else if (auto* child = mFrameLoader->GetBrowserBridgeChild()) {
// NOTE(emilio): We intentionally don't deal with the
// GetBrowserParent() case, and only deal with the fission iframe
// case. We could make it work, but it's a bit of boilerplate for
// something that we don't use, and we'd need to think how it
// interacts with the scrollbar window flags...
child->SendScrollbarPreferenceChanged(pref);
}
}
} else if (aName == nsGkAtoms::mozbrowser) {
mReallyIsBrowser = !!aValue && XRE_IsParentProcess() &&
NodePrincipal()->IsSystemPrincipal();
}
}
return nsGenericHTMLElement::AfterSetAttr(
aNameSpaceID, aName, aValue, aOldValue, aMaybeScriptedPrincipal, aNotify);
}
nsresult nsGenericHTMLFrameElement::OnAttrSetButNotChanged(
int32_t aNamespaceID, nsAtom* aName, const nsAttrValueOrString& aValue,
bool aNotify) {
AfterMaybeChangeAttr(aNamespaceID, aName, &aValue, nullptr, aNotify);
return nsGenericHTMLElement::OnAttrSetButNotChanged(aNamespaceID, aName,
aValue, aNotify);
}
void nsGenericHTMLFrameElement::AfterMaybeChangeAttr(
int32_t aNamespaceID, nsAtom* aName, const nsAttrValueOrString* aValue,
nsIPrincipal* aMaybeScriptedPrincipal, bool aNotify) {
if (aNamespaceID == kNameSpaceID_None) {
if (aName == nsGkAtoms::src) {
mSrcTriggeringPrincipal = nsContentUtils::GetAttrTriggeringPrincipal(
this, aValue ? aValue->String() : u""_ns, aMaybeScriptedPrincipal);
if (!IsHTMLElement(nsGkAtoms::iframe) ||
!HasAttr(kNameSpaceID_None, nsGkAtoms::srcdoc)) {
// Don't propagate error here. The attribute was successfully
// set or removed; that's what we should reflect.
LoadSrc();
}
} else if (aName == nsGkAtoms::name) {
// Propagate "name" to the browsing context per HTML5.
RefPtr<BrowsingContext> bc =
mFrameLoader ? mFrameLoader->GetExtantBrowsingContext() : nullptr;
if (bc) {
MOZ_ALWAYS_SUCCEEDS(bc->SetName(aValue ? aValue->String() : u""_ns));
}
}
}
}
void nsGenericHTMLFrameElement::DestroyContent() {
if (mFrameLoader) {
mFrameLoader->Destroy();
mFrameLoader = nullptr;
}
nsGenericHTMLElement::DestroyContent();
}
nsresult nsGenericHTMLFrameElement::CopyInnerTo(Element* aDest) {
nsresult rv = nsGenericHTMLElement::CopyInnerTo(aDest);
NS_ENSURE_SUCCESS(rv, rv);
Document* doc = aDest->OwnerDoc();
if (doc->IsStaticDocument() && mFrameLoader) {
nsGenericHTMLFrameElement* dest =
static_cast<nsGenericHTMLFrameElement*>(aDest);
doc->AddPendingFrameStaticClone(dest, mFrameLoader);
}
return rv;
}
bool nsGenericHTMLFrameElement::IsHTMLFocusable(bool aWithMouse,
bool* aIsFocusable,
int32_t* aTabIndex) {
if (nsGenericHTMLElement::IsHTMLFocusable(aWithMouse, aIsFocusable,
aTabIndex)) {
return true;
}
*aIsFocusable = nsContentUtils::IsSubDocumentTabbable(this);
if (!*aIsFocusable && aTabIndex) {
*aTabIndex = -1;
}
return false;
}
/**
* Return true if this frame element really is a mozbrowser. (It
* needs to have the right attributes, and its creator must have the right
* permissions.)
*/
/* [infallible] */
nsresult nsGenericHTMLFrameElement::GetReallyIsBrowser(bool* aOut) {
*aOut = mReallyIsBrowser;
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;
}