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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 "nsDOMSerializer.h"
#include "mozilla/Encoding.h"
#include "mozilla/dom/Document.h"
#include "nsIDocumentEncoder.h"
#include "nsComponentManagerUtils.h"
#include "nsContentCID.h"
#include "nsContentUtils.h"
#include "nsError.h"
#include "nsINode.h"
using namespace mozilla;
nsDOMSerializer::nsDOMSerializer() = default;
static already_AddRefed<nsIDocumentEncoder> SetUpEncoder(
nsINode& aRoot, const nsAString& aCharset, ErrorResult& aRv) {
nsCOMPtr<nsIDocumentEncoder> encoder =
do_createDocumentEncoder("application/xhtml+xml");
if (!encoder) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
dom::Document* doc = aRoot.OwnerDoc();
bool entireDocument = (doc == &aRoot);
// This method will fail if no document
nsresult rv = encoder->NativeInit(
doc, u"application/xhtml+xml"_ns,
nsIDocumentEncoder::OutputRaw |
nsIDocumentEncoder::OutputDontRewriteEncodingDeclaration);
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return nullptr;
}
NS_ConvertUTF16toUTF8 charset(aCharset);
if (charset.IsEmpty()) {
doc->GetDocumentCharacterSet()->Name(charset);
}
rv = encoder->SetCharset(charset);
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return nullptr;
}
// If we are working on the entire document we do not need to
// specify which part to serialize
if (!entireDocument) {
rv = encoder->SetNode(&aRoot);
}
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return nullptr;
}
return encoder.forget();
}
void nsDOMSerializer::SerializeToString(nsINode& aRoot, nsAString& aStr,
ErrorResult& aRv) {
aStr.Truncate();
if (!nsContentUtils::CanCallerAccess(&aRoot)) {
aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
return;
}
nsCOMPtr<nsIDocumentEncoder> encoder = SetUpEncoder(aRoot, u""_ns, aRv);
if (aRv.Failed()) {
return;
}
nsresult rv = encoder->EncodeToString(aStr);
if (NS_FAILED(rv)) {
aRv.Throw(rv);
}
}
void nsDOMSerializer::SerializeToStream(nsINode& aRoot,
nsIOutputStream* aStream,
const nsAString& aCharset,
ErrorResult& aRv) {
if (NS_WARN_IF(!aStream)) {
aRv.Throw(NS_ERROR_INVALID_ARG);
return;
}
// The charset arg can be empty, in which case we get the document's
// charset and use that when serializing.
// No point doing a CanCallerAccess check, because we can only be
// called by system JS or C++.
nsCOMPtr<nsIDocumentEncoder> encoder = SetUpEncoder(aRoot, aCharset, aRv);
if (aRv.Failed()) {
return;
}
nsresult rv = encoder->EncodeToStream(aStream);
if (NS_FAILED(rv)) {
aRv.Throw(rv);
}
}
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