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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "txUnknownHandler.h"
#include <utility>
#include "mozilla/UniquePtrExtensions.h"
#include "nsGkAtoms.h"
#include "txExecutionState.h"
#include "txStringUtils.h"
#include "txStylesheet.h"
using mozilla::UniquePtr;
using mozilla::WrapUnique;
txUnknownHandler::txUnknownHandler(txExecutionState* aEs)
: mEs(aEs), mFlushed(false) {
MOZ_COUNT_CTOR_INHERITED(txUnknownHandler, txBufferingHandler);
}
txUnknownHandler::~txUnknownHandler() {
MOZ_COUNT_DTOR_INHERITED(txUnknownHandler, txBufferingHandler);
}
nsresult txUnknownHandler::attribute(nsAtom* aPrefix, nsAtom* aLocalName,
nsAtom* aLowercaseLocalName, int32_t aNsID,
const nsString& aValue) {
return mFlushed
? mEs->mResultHandler->attribute(
aPrefix, aLocalName, aLowercaseLocalName, aNsID, aValue)
: txBufferingHandler::attribute(
aPrefix, aLocalName, aLowercaseLocalName, aNsID, aValue);
}
nsresult txUnknownHandler::attribute(nsAtom* aPrefix,
const nsAString& aLocalName,
const int32_t aNsID,
const nsString& aValue) {
return mFlushed ? mEs->mResultHandler->attribute(aPrefix, aLocalName, aNsID,
aValue)
: txBufferingHandler::attribute(aPrefix, aLocalName, aNsID,
aValue);
}
nsresult txUnknownHandler::characters(const nsAString& aData, bool aDOE) {
return mFlushed ? mEs->mResultHandler->characters(aData, aDOE)
: txBufferingHandler::characters(aData, aDOE);
}
nsresult txUnknownHandler::comment(const nsString& aData) {
return mFlushed ? mEs->mResultHandler->comment(aData)
: txBufferingHandler::comment(aData);
}
nsresult txUnknownHandler::endDocument(nsresult aResult) {
if (!mFlushed) {
if (NS_FAILED(aResult)) {
return NS_OK;
}
// This is an unusual case, no output method has been set and we
// didn't create a document element. Switching to XML output mode
// anyway.
// Make sure that mEs->mResultHandler == this is true, otherwise we'll
// leak mEs->mResultHandler in createHandlerAndFlush.
NS_ASSERTION(mEs->mResultHandler == this,
"We're leaking mEs->mResultHandler.");
nsresult rv = createHandlerAndFlush(false, u""_ns, kNameSpaceID_None);
NS_ENSURE_SUCCESS(rv, rv);
}
return mEs->mResultHandler->endDocument(aResult);
}
nsresult txUnknownHandler::endElement() {
return mFlushed ? mEs->mResultHandler->endElement()
: txBufferingHandler::endElement();
}
nsresult txUnknownHandler::processingInstruction(const nsString& aTarget,
const nsString& aData) {
return mFlushed ? mEs->mResultHandler->processingInstruction(aTarget, aData)
: txBufferingHandler::processingInstruction(aTarget, aData);
}
nsresult txUnknownHandler::startDocument() {
return mFlushed ? mEs->mResultHandler->startDocument()
: txBufferingHandler::startDocument();
}
nsresult txUnknownHandler::startElement(nsAtom* aPrefix, nsAtom* aLocalName,
nsAtom* aLowercaseLocalName,
int32_t aNsID) {
if (!mFlushed) {
// Make sure that mEs->mResultHandler == this is true, otherwise we'll
// leak mEs->mResultHandler in createHandlerAndFlush.
NS_ASSERTION(mEs->mResultHandler == this,
"We're leaking mEs->mResultHandler.");
RefPtr<nsAtom> owner;
if (!aLowercaseLocalName) {
owner = TX_ToLowerCaseAtom(aLocalName);
NS_ENSURE_TRUE(owner, NS_ERROR_OUT_OF_MEMORY);
aLowercaseLocalName = owner;
}
bool htmlRoot = aNsID == kNameSpaceID_None && !aPrefix &&
aLowercaseLocalName == nsGkAtoms::html;
// Use aLocalName and not aLowercaseLocalName in case the output
// handler cares about case. For eHTMLOutput the handler will hardcode
// to 'html' anyway.
nsresult rv = createHandlerAndFlush(
htmlRoot, nsDependentAtomString(aLocalName), aNsID);
NS_ENSURE_SUCCESS(rv, rv);
}
return mEs->mResultHandler->startElement(aPrefix, aLocalName,
aLowercaseLocalName, aNsID);
}
nsresult txUnknownHandler::startElement(nsAtom* aPrefix,
const nsAString& aLocalName,
const int32_t aNsID) {
if (!mFlushed) {
// Make sure that mEs->mResultHandler == this is true, otherwise we'll
// leak mEs->mResultHandler in createHandlerAndFlush.
NS_ASSERTION(mEs->mResultHandler == this,
"We're leaking mEs->mResultHandler.");
bool htmlRoot =
aNsID == kNameSpaceID_None && !aPrefix &&
aLocalName.Equals(u"html"_ns, nsCaseInsensitiveStringComparator);
nsresult rv = createHandlerAndFlush(htmlRoot, aLocalName, aNsID);
NS_ENSURE_SUCCESS(rv, rv);
}
return mEs->mResultHandler->startElement(aPrefix, aLocalName, aNsID);
}
nsresult txUnknownHandler::createHandlerAndFlush(bool aHTMLRoot,
const nsAString& aName,
const int32_t aNsID) {
NS_ENSURE_TRUE(mBuffer, NS_ERROR_NOT_INITIALIZED);
txOutputFormat format;
format.merge(*(mEs->mStylesheet->getOutputFormat()));
if (format.mMethod == eMethodNotSet) {
format.mMethod = aHTMLRoot ? eHTMLOutput : eXMLOutput;
}
UniquePtr<txAXMLEventHandler> handler;
nsresult rv = mEs->mOutputHandlerFactory->createHandlerWith(
&format, aName, aNsID, getter_Transfers(handler));
NS_ENSURE_SUCCESS(rv, rv);
mEs->mOutputHandler = handler.get();
mEs->mResultHandler = handler.release();
// Let the executionstate delete us. We need to stay alive because we might
// need to forward hooks to mEs->mResultHandler if someone is currently
// flushing a buffer to mEs->mResultHandler.
mEs->mObsoleteHandler = WrapUnique(this);
mFlushed = true;
// Let go of out buffer as soon as we're done flushing it, we're not going
// to need it anymore from this point on (all hooks get forwarded to
// mEs->mResultHandler.
UniquePtr<txResultBuffer> buffer(std::move(mBuffer));
return buffer->flushToHandler(mEs->mResultHandler);
}
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