зеркало из https://github.com/mozilla/gecko-dev.git
122 строки
3.0 KiB
C++
122 строки
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 "nsDOMSerializer.h"
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#include "mozilla/Encoding.h"
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#include "nsIDocument.h"
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#include "nsIDocumentEncoder.h"
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#include "nsComponentManagerUtils.h"
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#include "nsContentCID.h"
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#include "nsContentUtils.h"
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#include "nsError.h"
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#include "nsINode.h"
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using namespace mozilla;
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nsDOMSerializer::nsDOMSerializer()
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{
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}
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static already_AddRefed<nsIDocumentEncoder>
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SetUpEncoder(nsINode& aRoot, const nsAString& aCharset, ErrorResult& aRv)
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{
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nsresult rv;
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nsCOMPtr<nsIDocumentEncoder> encoder =
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do_CreateInstance(NS_DOC_ENCODER_CONTRACTID_BASE "application/xhtml+xml", &rv);
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if (NS_FAILED(rv)) {
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aRv.Throw(rv);
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return nullptr;
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}
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nsIDocument* doc = aRoot.OwnerDoc();
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bool entireDocument = (doc == &aRoot);
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// This method will fail if no document
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rv = encoder->
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NativeInit(doc, NS_LITERAL_STRING("application/xhtml+xml"),
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nsIDocumentEncoder::OutputRaw |
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nsIDocumentEncoder::OutputDontRewriteEncodingDeclaration);
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if (NS_FAILED(rv)) {
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aRv.Throw(rv);
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return nullptr;
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}
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NS_ConvertUTF16toUTF8 charset(aCharset);
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if (charset.IsEmpty()) {
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doc->GetDocumentCharacterSet()->Name(charset);
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}
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rv = encoder->SetCharset(charset);
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if (NS_FAILED(rv)) {
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aRv.Throw(rv);
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return nullptr;
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}
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// If we are working on the entire document we do not need to
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// specify which part to serialize
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if (!entireDocument) {
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rv = encoder->SetNode(&aRoot);
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}
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if (NS_FAILED(rv)) {
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aRv.Throw(rv);
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return nullptr;
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}
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return encoder.forget();
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}
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void
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nsDOMSerializer::SerializeToString(nsINode& aRoot, nsAString& aStr,
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ErrorResult& aRv)
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{
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aStr.Truncate();
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if (!nsContentUtils::CanCallerAccess(&aRoot)) {
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aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
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return;
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}
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nsCOMPtr<nsIDocumentEncoder> encoder =
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SetUpEncoder(aRoot, EmptyString(), aRv);
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if (aRv.Failed()) {
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return;
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}
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nsresult rv = encoder->EncodeToString(aStr);
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if (NS_FAILED(rv)) {
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aRv.Throw(rv);
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}
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}
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void
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nsDOMSerializer::SerializeToStream(nsINode& aRoot, nsIOutputStream* aStream,
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const nsAString& aCharset,
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ErrorResult& aRv)
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{
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if (NS_WARN_IF(!aStream)) {
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aRv.Throw(NS_ERROR_INVALID_ARG);
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return;
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}
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// The charset arg can be empty, in which case we get the document's
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// charset and use that when serializing.
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// No point doing a CanCallerAccess check, because we can only be
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// called by system JS or C++.
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nsCOMPtr<nsIDocumentEncoder> encoder =
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SetUpEncoder(aRoot, aCharset, aRv);
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if (aRv.Failed()) {
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return;
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}
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nsresult rv = encoder->EncodeToStream(aStream);
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if (NS_FAILED(rv)) {
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aRv.Throw(rv);
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}
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}
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