mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-07 13:24:12 +00:00
d225f7151b
(Path is actually r=froydnj.) Bug 1400459 devirtualized nsIAtom so that it is no longer a subclass of nsISupports. This means that nsAtom is now a better name for it than nsIAtom. MozReview-Commit-ID: 91U22X2NydP --HG-- rename : xpcom/ds/nsIAtom.h => xpcom/ds/nsAtom.h extra : rebase_source : ac3e904a21b8b48e74534fff964f1623ee937c67
255 lines
7.4 KiB
C++
255 lines
7.4 KiB
C++
/* -*- 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 "IDTracker.h"
|
|
|
|
#include "mozilla/Encoding.h"
|
|
#include "nsContentUtils.h"
|
|
#include "nsIURI.h"
|
|
#include "nsBindingManager.h"
|
|
#include "nsEscape.h"
|
|
#include "nsXBLPrototypeBinding.h"
|
|
#include "nsIDOMNode.h"
|
|
#include "nsIDOMElement.h"
|
|
#include "nsCycleCollectionParticipant.h"
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
|
|
void
|
|
IDTracker::Reset(nsIContent* aFromContent, nsIURI* aURI,
|
|
bool aWatch, bool aReferenceImage)
|
|
{
|
|
MOZ_ASSERT(aFromContent, "Reset() expects non-null content pointer");
|
|
|
|
Unlink();
|
|
|
|
if (!aURI)
|
|
return;
|
|
|
|
nsAutoCString refPart;
|
|
aURI->GetRef(refPart);
|
|
// Unescape %-escapes in the reference. The result will be in the
|
|
// document charset, hopefully...
|
|
NS_UnescapeURL(refPart);
|
|
|
|
// Get the current document
|
|
nsIDocument *doc = aFromContent->OwnerDoc();
|
|
if (!doc) {
|
|
return;
|
|
}
|
|
|
|
auto encoding = doc->GetDocumentCharacterSet();
|
|
nsAutoString ref;
|
|
nsresult rv = encoding->DecodeWithoutBOMHandling(refPart, ref);
|
|
if (NS_FAILED(rv) || ref.IsEmpty()) {
|
|
return;
|
|
}
|
|
rv = NS_OK;
|
|
|
|
nsIContent* bindingParent = aFromContent->GetBindingParent();
|
|
if (bindingParent) {
|
|
nsXBLBinding* binding = bindingParent->GetXBLBinding();
|
|
if (!binding) {
|
|
// This happens, for example, if aFromContent is part of the content
|
|
// inserted by a call to nsIDocument::InsertAnonymousContent, which we
|
|
// also want to handle. (It also happens for <use>'s anonymous
|
|
// content etc.)
|
|
Element* anonRoot =
|
|
doc->GetAnonRootIfInAnonymousContentContainer(aFromContent);
|
|
if (anonRoot) {
|
|
mElement = nsContentUtils::MatchElementId(anonRoot, ref);
|
|
// We don't have watching working yet for anonymous content, so bail out here.
|
|
return;
|
|
}
|
|
} else {
|
|
bool isEqualExceptRef;
|
|
rv = aURI->EqualsExceptRef(binding->PrototypeBinding()->DocURI(),
|
|
&isEqualExceptRef);
|
|
if (NS_SUCCEEDED(rv) && isEqualExceptRef) {
|
|
// XXX sXBL/XBL2 issue
|
|
// Our content is an anonymous XBL element from a binding inside the
|
|
// same document that the referenced URI points to. In order to avoid
|
|
// the risk of ID collisions we restrict ourselves to anonymous
|
|
// elements from this binding; specifically, URIs that are relative to
|
|
// the binding document should resolve to the copy of the target
|
|
// element that has been inserted into the bound document.
|
|
// If the URI points to a different document we don't need this
|
|
// restriction.
|
|
nsINodeList* anonymousChildren =
|
|
doc->BindingManager()->GetAnonymousNodesFor(bindingParent);
|
|
|
|
if (anonymousChildren) {
|
|
uint32_t length;
|
|
anonymousChildren->GetLength(&length);
|
|
for (uint32_t i = 0; i < length && !mElement; ++i) {
|
|
mElement =
|
|
nsContentUtils::MatchElementId(anonymousChildren->Item(i), ref);
|
|
}
|
|
}
|
|
|
|
// We don't have watching working yet for XBL, so bail out here.
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool isEqualExceptRef;
|
|
rv = aURI->EqualsExceptRef(doc->GetDocumentURI(), &isEqualExceptRef);
|
|
if (NS_FAILED(rv) || !isEqualExceptRef) {
|
|
RefPtr<nsIDocument::ExternalResourceLoad> load;
|
|
doc = doc->RequestExternalResource(aURI, aFromContent,
|
|
getter_AddRefs(load));
|
|
if (!doc) {
|
|
if (!load || !aWatch) {
|
|
// Nothing will ever happen here
|
|
return;
|
|
}
|
|
|
|
DocumentLoadNotification* observer =
|
|
new DocumentLoadNotification(this, ref);
|
|
mPendingNotification = observer;
|
|
if (observer) {
|
|
load->AddObserver(observer);
|
|
}
|
|
// Keep going so we set up our watching stuff a bit
|
|
}
|
|
}
|
|
|
|
if (aWatch) {
|
|
RefPtr<nsAtom> atom = NS_Atomize(ref);
|
|
if (!atom)
|
|
return;
|
|
atom.swap(mWatchID);
|
|
}
|
|
|
|
mReferencingImage = aReferenceImage;
|
|
|
|
HaveNewDocument(doc, aWatch, ref);
|
|
}
|
|
|
|
void
|
|
IDTracker::ResetWithID(nsIContent* aFromContent, const nsString& aID,
|
|
bool aWatch)
|
|
{
|
|
nsIDocument *doc = aFromContent->OwnerDoc();
|
|
if (!doc)
|
|
return;
|
|
|
|
// XXX Need to take care of XBL/XBL2
|
|
|
|
if (aWatch) {
|
|
RefPtr<nsAtom> atom = NS_Atomize(aID);
|
|
if (!atom)
|
|
return;
|
|
atom.swap(mWatchID);
|
|
}
|
|
|
|
mReferencingImage = false;
|
|
|
|
HaveNewDocument(doc, aWatch, aID);
|
|
}
|
|
|
|
void
|
|
IDTracker::HaveNewDocument(nsIDocument* aDocument, bool aWatch,
|
|
const nsString& aRef)
|
|
{
|
|
if (aWatch) {
|
|
mWatchDocument = aDocument;
|
|
if (mWatchDocument) {
|
|
mElement = mWatchDocument->AddIDTargetObserver(mWatchID, Observe, this,
|
|
mReferencingImage);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (!aDocument) {
|
|
return;
|
|
}
|
|
|
|
Element *e = mReferencingImage ? aDocument->LookupImageElement(aRef) :
|
|
aDocument->GetElementById(aRef);
|
|
if (e) {
|
|
mElement = e;
|
|
}
|
|
}
|
|
|
|
void
|
|
IDTracker::Traverse(nsCycleCollectionTraversalCallback* aCB)
|
|
{
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(*aCB, "mWatchDocument");
|
|
aCB->NoteXPCOMChild(mWatchDocument);
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(*aCB, "mContent");
|
|
aCB->NoteXPCOMChild(mElement);
|
|
}
|
|
|
|
void
|
|
IDTracker::Unlink()
|
|
{
|
|
if (mWatchDocument && mWatchID) {
|
|
mWatchDocument->RemoveIDTargetObserver(mWatchID, Observe, this,
|
|
mReferencingImage);
|
|
}
|
|
if (mPendingNotification) {
|
|
mPendingNotification->Clear();
|
|
mPendingNotification = nullptr;
|
|
}
|
|
mWatchDocument = nullptr;
|
|
mWatchID = nullptr;
|
|
mElement = nullptr;
|
|
mReferencingImage = false;
|
|
}
|
|
|
|
bool
|
|
IDTracker::Observe(Element* aOldElement,
|
|
Element* aNewElement, void* aData)
|
|
{
|
|
IDTracker* p = static_cast<IDTracker*>(aData);
|
|
if (p->mPendingNotification) {
|
|
p->mPendingNotification->SetTo(aNewElement);
|
|
} else {
|
|
NS_ASSERTION(aOldElement == p->mElement, "Failed to track content!");
|
|
ChangeNotification* watcher =
|
|
new ChangeNotification(p, aOldElement, aNewElement);
|
|
p->mPendingNotification = watcher;
|
|
nsContentUtils::AddScriptRunner(watcher);
|
|
}
|
|
bool keepTracking = p->IsPersistent();
|
|
if (!keepTracking) {
|
|
p->mWatchDocument = nullptr;
|
|
p->mWatchID = nullptr;
|
|
}
|
|
return keepTracking;
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS_INHERITED0(IDTracker::ChangeNotification,
|
|
mozilla::Runnable)
|
|
|
|
NS_IMPL_ISUPPORTS(IDTracker::DocumentLoadNotification,
|
|
nsIObserver)
|
|
|
|
NS_IMETHODIMP
|
|
IDTracker::DocumentLoadNotification::Observe(nsISupports* aSubject,
|
|
const char* aTopic,
|
|
const char16_t* aData)
|
|
{
|
|
NS_ASSERTION(PL_strcmp(aTopic, "external-resource-document-created") == 0,
|
|
"Unexpected topic");
|
|
if (mTarget) {
|
|
nsCOMPtr<nsIDocument> doc = do_QueryInterface(aSubject);
|
|
mTarget->mPendingNotification = nullptr;
|
|
NS_ASSERTION(!mTarget->mElement, "Why do we have content here?");
|
|
// If we got here, that means we had Reset() called with aWatch ==
|
|
// true. So keep watching if IsPersistent().
|
|
mTarget->HaveNewDocument(doc, mTarget->IsPersistent(), mRef);
|
|
mTarget->ElementChanged(nullptr, mTarget->mElement);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|