gecko-dev/dom/base/nsScriptElement.cpp
Boris Zbarsky 363a5143aa Bug 1297125. Make sure the parser insertion point is defined when firing the load event for external <scripts> or firing the error event on a failed external script load (but not other cases, like bogus script URL). r=hsivonen
If we have a creator parser, then we were a parser-inserted script and should
presumably be able to set a valid insertion point when we run or fire our
load/error events.  For the error event case, we do this in
nsScriptElement::ScriptAvailable, so that async error events due to things like
bogus script URLs do not end up with a valid insertion point.  For the load
event case, we just do this in ScriptEvaluated directly.

ScriptEvaluated is called while the scriptloader has our script set as the
current parser-inserted script.  But for the error event case we need to
maintain that state around the ScriptAvailable call that will fire the event.
2016-09-02 17:55:38 -04:00

151 lines
4.5 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 "nsScriptElement.h"
#include "mozilla/BasicEvents.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/dom/Element.h"
#include "nsContentUtils.h"
#include "nsPresContext.h"
#include "nsScriptLoader.h"
#include "nsIParser.h"
#include "nsGkAtoms.h"
#include "nsContentSink.h"
using namespace mozilla;
using namespace mozilla::dom;
NS_IMETHODIMP
nsScriptElement::ScriptAvailable(nsresult aResult,
nsIScriptElement *aElement,
bool aIsInline,
nsIURI *aURI,
int32_t aLineNo)
{
if (!aIsInline && NS_FAILED(aResult)) {
nsCOMPtr<nsIParser> parser = do_QueryReferent(mCreatorParser);
if (parser) {
parser->PushDefinedInsertionPoint();
}
nsresult rv = FireErrorEvent();
if (parser) {
parser->PopDefinedInsertionPoint();
}
return rv;
}
return NS_OK;
}
/* virtual */ nsresult
nsScriptElement::FireErrorEvent()
{
nsCOMPtr<nsIContent> cont =
do_QueryInterface((nsIScriptElement*) this);
return nsContentUtils::DispatchTrustedEvent(cont->OwnerDoc(),
cont,
NS_LITERAL_STRING("error"),
false /* bubbles */,
false /* cancelable */);
}
NS_IMETHODIMP
nsScriptElement::ScriptEvaluated(nsresult aResult,
nsIScriptElement *aElement,
bool aIsInline)
{
nsresult rv = NS_OK;
if (!aIsInline) {
nsCOMPtr<nsIContent> cont =
do_QueryInterface((nsIScriptElement*) this);
RefPtr<nsPresContext> presContext =
nsContentUtils::GetContextForContent(cont);
nsEventStatus status = nsEventStatus_eIgnore;
EventMessage message = NS_SUCCEEDED(aResult) ? eLoad : eLoadError;
WidgetEvent event(true, message);
// Load event doesn't bubble.
event.mFlags.mBubbles = (message != eLoad);
EventDispatcher::Dispatch(cont, presContext, &event, nullptr, &status);
}
return rv;
}
void
nsScriptElement::CharacterDataChanged(nsIDocument *aDocument,
nsIContent* aContent,
CharacterDataChangeInfo* aInfo)
{
MaybeProcessScript();
}
void
nsScriptElement::AttributeChanged(nsIDocument* aDocument,
Element* aElement,
int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType,
const nsAttrValue* aOldValue)
{
MaybeProcessScript();
}
void
nsScriptElement::ContentAppended(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aFirstNewContent,
int32_t aNewIndexInContainer)
{
MaybeProcessScript();
}
void
nsScriptElement::ContentInserted(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aChild,
int32_t aIndexInContainer)
{
MaybeProcessScript();
}
bool
nsScriptElement::MaybeProcessScript()
{
nsCOMPtr<nsIContent> cont =
do_QueryInterface((nsIScriptElement*) this);
NS_ASSERTION(cont->DebugGetSlots()->mMutationObservers.Contains(this),
"You forgot to add self as observer");
if (mAlreadyStarted || !mDoneAddingChildren ||
!cont->GetComposedDoc() || mMalformed || !HasScriptContent()) {
return false;
}
FreezeUriAsyncDefer();
mAlreadyStarted = true;
nsIDocument* ownerDoc = cont->OwnerDoc();
nsCOMPtr<nsIParser> parser = ((nsIScriptElement*) this)->GetCreatorParser();
if (parser) {
nsCOMPtr<nsIContentSink> sink = parser->GetContentSink();
if (sink) {
nsCOMPtr<nsIDocument> parserDoc = do_QueryInterface(sink->GetTarget());
if (ownerDoc != parserDoc) {
// Willful violation of HTML5 as of 2010-12-01
return false;
}
}
}
RefPtr<nsScriptLoader> loader = ownerDoc->ScriptLoader();
return loader->ProcessScriptElement(this);
}