mirror of
https://github.com/roytam1/UXP.git
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Moonchild
824d0cad58
In order to tailor certain security checks to the caller that is attempting to load a particular piece of content, we need to be able to attach an appropriate triggering principal to the corresponding requests. Since most HTML content is loaded based on attribute values, this means capturing the subject principal of the caller who sets those attributes, which in turn means we need to make it available to `AfterSetAttr` hooks on all relevant element types.
451 lines
14 KiB
C++
451 lines
14 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/EventStates.h"
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#include "mozilla/dom/HTMLSharedObjectElement.h"
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#include "mozilla/dom/HTMLEmbedElementBinding.h"
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#include "mozilla/dom/HTMLAppletElementBinding.h"
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#include "mozilla/dom/ElementInlines.h"
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#include "nsIDocument.h"
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#include "nsIPluginDocument.h"
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#include "nsIDOMDocument.h"
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#include "nsThreadUtils.h"
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#include "nsIScriptError.h"
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#include "nsIWidget.h"
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#include "nsContentUtils.h"
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#ifdef XP_MACOSX
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/dom/Event.h"
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#endif
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#include "mozilla/dom/HTMLObjectElement.h"
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NS_IMPL_NS_NEW_HTML_ELEMENT_CHECK_PARSER(SharedObject)
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namespace mozilla {
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namespace dom {
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HTMLSharedObjectElement::HTMLSharedObjectElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo,
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FromParser aFromParser)
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: nsGenericHTMLElement(aNodeInfo),
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mIsDoneAddingChildren(mNodeInfo->Equals(nsGkAtoms::embed) || !aFromParser)
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{
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RegisterActivityObserver();
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SetIsNetworkCreated(aFromParser == FROM_PARSER_NETWORK);
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// By default we're in the loading state
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AddStatesSilently(NS_EVENT_STATE_LOADING);
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}
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HTMLSharedObjectElement::~HTMLSharedObjectElement()
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{
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#ifdef XP_MACOSX
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HTMLObjectElement::OnFocusBlurPlugin(this, false);
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#endif
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UnregisterActivityObserver();
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DestroyImageLoadingContent();
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}
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bool
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HTMLSharedObjectElement::IsDoneAddingChildren()
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{
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return mIsDoneAddingChildren;
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}
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void
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HTMLSharedObjectElement::DoneAddingChildren(bool aHaveNotified)
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{
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if (!mIsDoneAddingChildren) {
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mIsDoneAddingChildren = true;
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// If we're already in a document, we need to trigger the load
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// Otherwise, BindToTree takes care of that.
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if (IsInComposedDoc()) {
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StartObjectLoad(aHaveNotified, false);
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}
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}
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}
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NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLSharedObjectElement)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(HTMLSharedObjectElement,
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nsGenericHTMLElement)
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nsObjectLoadingContent::Traverse(tmp, cb);
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_ADDREF_INHERITED(HTMLSharedObjectElement, Element)
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NS_IMPL_RELEASE_INHERITED(HTMLSharedObjectElement, Element)
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NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(HTMLSharedObjectElement)
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NS_INTERFACE_TABLE_INHERITED(HTMLSharedObjectElement,
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nsIRequestObserver,
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nsIStreamListener,
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nsIFrameLoaderOwner,
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nsIObjectLoadingContent,
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imgINotificationObserver,
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nsIImageLoadingContent,
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imgIOnloadBlocker,
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nsIChannelEventSink)
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NS_INTERFACE_TABLE_TO_MAP_SEGUE
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NS_INTERFACE_MAP_ENTRY_IF_TAG(nsIDOMHTMLAppletElement, applet)
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NS_INTERFACE_MAP_ENTRY_IF_TAG(nsIDOMHTMLEmbedElement, embed)
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NS_INTERFACE_MAP_END_INHERITING(nsGenericHTMLElement)
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NS_IMPL_ELEMENT_CLONE(HTMLSharedObjectElement)
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#ifdef XP_MACOSX
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NS_IMETHODIMP
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HTMLSharedObjectElement::PostHandleEvent(EventChainPostVisitor& aVisitor)
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{
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HTMLObjectElement::HandleFocusBlurPlugin(this, aVisitor.mEvent);
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return NS_OK;
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}
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#endif // #ifdef XP_MACOSX
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void
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HTMLSharedObjectElement::AsyncEventRunning(AsyncEventDispatcher* aEvent)
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{
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nsImageLoadingContent::AsyncEventRunning(aEvent);
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}
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nsresult
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HTMLSharedObjectElement::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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rv = nsObjectLoadingContent::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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// Don't kick off load from being bound to a plugin document - the plugin
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// document will call nsObjectLoadingContent::InitializeFromChannel() for the
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// initial load.
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nsCOMPtr<nsIPluginDocument> pluginDoc = do_QueryInterface(aDocument);
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// If we already have all the children, start the load.
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if (mIsDoneAddingChildren && !pluginDoc) {
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void (HTMLSharedObjectElement::*start)() =
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&HTMLSharedObjectElement::StartObjectLoad;
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nsContentUtils::AddScriptRunner(NewRunnableMethod(this, start));
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}
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return NS_OK;
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}
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void
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HTMLSharedObjectElement::UnbindFromTree(bool aDeep,
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bool aNullParent)
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{
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#ifdef XP_MACOSX
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// When a page is reloaded (when an nsIDocument's content is removed), the
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// focused element isn't necessarily sent an eBlur event. See
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// nsFocusManager::ContentRemoved(). This means that a widget may think it
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// still contains a focused plugin when it doesn't -- which in turn can
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// disable text input in the browser window. See bug 1137229.
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HTMLObjectElement::OnFocusBlurPlugin(this, false);
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#endif
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nsObjectLoadingContent::UnbindFromTree(aDeep, aNullParent);
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nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
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}
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nsresult
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HTMLSharedObjectElement::AfterSetAttr(int32_t aNamespaceID, nsIAtom* aName,
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const nsAttrValue* aValue,
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const nsAttrValue* aOldValue,
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nsIPrincipal* aSubjectPrincipal,
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bool aNotify)
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{
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if (aValue) {
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nsresult rv = AfterMaybeChangeAttr(aNamespaceID, aName, aNotify);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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return nsGenericHTMLElement::AfterSetAttr(aNamespaceID, aName, aValue,
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aOldValue, aSubjectPrincipal, aNotify);
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}
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nsresult
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HTMLSharedObjectElement::OnAttrSetButNotChanged(int32_t aNamespaceID,
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nsIAtom* aName,
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const nsAttrValueOrString& aValue,
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bool aNotify)
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{
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nsresult rv = AfterMaybeChangeAttr(aNamespaceID, aName, aNotify);
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NS_ENSURE_SUCCESS(rv, rv);
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return nsGenericHTMLElement::OnAttrSetButNotChanged(aNamespaceID, aName,
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aValue, aNotify);
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}
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nsresult
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HTMLSharedObjectElement::AfterMaybeChangeAttr(int32_t aNamespaceID,
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nsIAtom* aName,
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bool aNotify)
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{
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if (aNamespaceID == kNameSpaceID_None) {
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if (aName == URIAttrName()) {
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// If aNotify is false, we are coming from the parser or some such place;
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// we'll get bound after all the attributes have been set, so we'll do the
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// object load from BindToTree/DoneAddingChildren.
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// Skip the LoadObject call in that case.
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// We also don't want to start loading the object when we're not yet in
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// a document, just in case that the caller wants to set additional
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// attributes before inserting the node into the document.
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if (aNotify && IsInComposedDoc() && mIsDoneAddingChildren) {
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nsContentUtils::AddScriptRunner(NS_NewRunnableFunction(
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[self = RefPtr<HTMLSharedObjectElement>(this), aNotify]() {
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if (self->IsInComposedDoc()) {
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self->LoadObject(aNotify, true);
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}
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}));
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return NS_OK;
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}
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}
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}
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return NS_OK;
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}
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bool
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HTMLSharedObjectElement::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 (mNodeInfo->Equals(nsGkAtoms::embed) || Type() == eType_Plugin) {
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// Has plugin content: let the plugin decide what to do in terms of
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// internal focus from mouse clicks
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if (aTabIndex) {
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GetTabIndex(aTabIndex);
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}
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*aIsFocusable = true;
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// Let the plugin decide, so override.
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return true;
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}
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return nsGenericHTMLElement::IsHTMLFocusable(aWithMouse, aIsFocusable, aTabIndex);
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}
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nsIContent::IMEState
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HTMLSharedObjectElement::GetDesiredIMEState()
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{
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if (Type() == eType_Plugin) {
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return IMEState(IMEState::PLUGIN);
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}
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return nsGenericHTMLElement::GetDesiredIMEState();
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}
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NS_IMPL_STRING_ATTR(HTMLSharedObjectElement, Align, align)
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NS_IMPL_STRING_ATTR(HTMLSharedObjectElement, Alt, alt)
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NS_IMPL_STRING_ATTR(HTMLSharedObjectElement, Archive, archive)
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NS_IMPL_STRING_ATTR(HTMLSharedObjectElement, Code, code)
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NS_IMPL_URI_ATTR(HTMLSharedObjectElement, CodeBase, codebase)
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NS_IMPL_STRING_ATTR(HTMLSharedObjectElement, Height, height)
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NS_IMPL_INT_ATTR(HTMLSharedObjectElement, Hspace, hspace)
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NS_IMPL_STRING_ATTR(HTMLSharedObjectElement, Name, name)
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NS_IMPL_URI_ATTR_WITH_BASE(HTMLSharedObjectElement, Object, object, codebase)
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NS_IMPL_URI_ATTR(HTMLSharedObjectElement, Src, src)
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NS_IMPL_STRING_ATTR(HTMLSharedObjectElement, Type, type)
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NS_IMPL_INT_ATTR(HTMLSharedObjectElement, Vspace, vspace)
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NS_IMPL_STRING_ATTR(HTMLSharedObjectElement, Width, width)
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int32_t
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HTMLSharedObjectElement::TabIndexDefault()
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{
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return -1;
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}
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bool
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HTMLSharedObjectElement::ParseAttribute(int32_t aNamespaceID,
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nsIAtom *aAttribute,
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const nsAString &aValue,
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nsAttrValue &aResult)
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{
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if (aNamespaceID == kNameSpaceID_None) {
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if (aAttribute == nsGkAtoms::align) {
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return ParseAlignValue(aValue, aResult);
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}
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if (ParseImageAttribute(aAttribute, aValue, aResult)) {
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return true;
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}
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}
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return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
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aResult);
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}
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static void
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MapAttributesIntoRuleBase(const nsMappedAttributes *aAttributes,
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nsRuleData *aData)
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{
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nsGenericHTMLElement::MapImageBorderAttributeInto(aAttributes, aData);
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nsGenericHTMLElement::MapImageMarginAttributeInto(aAttributes, aData);
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nsGenericHTMLElement::MapImageSizeAttributesInto(aAttributes, aData);
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nsGenericHTMLElement::MapImageAlignAttributeInto(aAttributes, aData);
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}
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static void
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MapAttributesIntoRuleExceptHidden(const nsMappedAttributes *aAttributes,
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nsRuleData *aData)
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{
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MapAttributesIntoRuleBase(aAttributes, aData);
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nsGenericHTMLElement::MapCommonAttributesIntoExceptHidden(aAttributes, aData);
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}
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void
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HTMLSharedObjectElement::MapAttributesIntoRule(const nsMappedAttributes *aAttributes,
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nsRuleData *aData)
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{
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MapAttributesIntoRuleBase(aAttributes, aData);
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nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aData);
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}
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NS_IMETHODIMP_(bool)
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HTMLSharedObjectElement::IsAttributeMapped(const nsIAtom *aAttribute) const
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{
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static const MappedAttributeEntry* const map[] = {
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sCommonAttributeMap,
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sImageMarginSizeAttributeMap,
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sImageBorderAttributeMap,
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sImageAlignAttributeMap,
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};
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return FindAttributeDependence(aAttribute, map);
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}
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nsMapRuleToAttributesFunc
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HTMLSharedObjectElement::GetAttributeMappingFunction() const
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{
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if (mNodeInfo->Equals(nsGkAtoms::embed)) {
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return &MapAttributesIntoRuleExceptHidden;
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}
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return &MapAttributesIntoRule;
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}
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void
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HTMLSharedObjectElement::StartObjectLoad(bool aNotify, bool aForceLoad)
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{
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// BindToTree can call us asynchronously, and we may be removed from the tree
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// in the interim
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if (!IsInComposedDoc() || !OwnerDoc()->IsActive() ||
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BlockEmbedContentLoading()) {
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return;
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}
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LoadObject(aNotify, aForceLoad);
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SetIsNetworkCreated(false);
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}
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EventStates
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HTMLSharedObjectElement::IntrinsicState() const
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{
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return nsGenericHTMLElement::IntrinsicState() | ObjectState();
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}
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uint32_t
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HTMLSharedObjectElement::GetCapabilities() const
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{
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uint32_t capabilities = eSupportPlugins | eAllowPluginSkipChannel;
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if (mNodeInfo->Equals(nsGkAtoms::embed)) {
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capabilities |= eSupportImages | eSupportDocuments;
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}
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return capabilities;
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}
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void
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HTMLSharedObjectElement::DestroyContent()
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{
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nsObjectLoadingContent::DestroyContent();
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nsGenericHTMLElement::DestroyContent();
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}
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nsresult
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HTMLSharedObjectElement::CopyInnerTo(Element* aDest)
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{
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nsresult rv = nsGenericHTMLElement::CopyInnerTo(aDest);
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NS_ENSURE_SUCCESS(rv, rv);
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if (aDest->OwnerDoc()->IsStaticDocument()) {
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CreateStaticClone(static_cast<HTMLSharedObjectElement*>(aDest));
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}
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return rv;
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}
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JSObject*
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HTMLSharedObjectElement::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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JSObject* obj;
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if (mNodeInfo->Equals(nsGkAtoms::applet)) {
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obj = HTMLAppletElementBinding::Wrap(aCx, this, aGivenProto);
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} else {
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MOZ_ASSERT(mNodeInfo->Equals(nsGkAtoms::embed));
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obj = HTMLEmbedElementBinding::Wrap(aCx, this, aGivenProto);
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}
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if (!obj) {
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return nullptr;
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}
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JS::Rooted<JSObject*> rootedObj(aCx, obj);
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SetupProtoChain(aCx, rootedObj);
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return rootedObj;
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}
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nsContentPolicyType
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HTMLSharedObjectElement::GetContentPolicyType() const
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{
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if (mNodeInfo->Equals(nsGkAtoms::applet)) {
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// We use TYPE_INTERNAL_OBJECT for applet too, since it is not exposed
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// through RequestContext yet.
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return nsIContentPolicy::TYPE_INTERNAL_OBJECT;
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} else {
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MOZ_ASSERT(mNodeInfo->Equals(nsGkAtoms::embed));
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return nsIContentPolicy::TYPE_INTERNAL_EMBED;
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}
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}
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bool
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HTMLSharedObjectElement::BlockEmbedContentLoading()
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{
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// Only check on embed elements
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if (!IsHTMLElement(nsGkAtoms::embed)) {
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return false;
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}
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// Traverse up the node tree to see if we have any ancestors that may block us
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// from loading
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for (nsIContent* parent = GetParent(); parent; parent = parent->GetParent()) {
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if (parent->IsAnyOfHTMLElements(nsGkAtoms::video, nsGkAtoms::audio)) {
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return true;
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}
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// If we have an ancestor that is an object with a source, it'll have an
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// associated displayed type. If that type is not null, don't load content
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// for the embed.
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if (HTMLObjectElement* object = HTMLObjectElement::FromContent(parent)) {
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uint32_t type = object->DisplayedType();
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if (type != eType_Null) {
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return true;
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}
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}
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}
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return false;
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}
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} // namespace dom
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} // namespace mozilla
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