michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsString.h"
michael@0: #include "nsIComponentManager.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsXPCOM.h"
michael@0: #include "nsISupportsPrimitives.h"
michael@0: #include "nsXPIDLString.h"
michael@0: #include "nsScriptLoader.h"
michael@0: #include "nsEscape.h"
michael@0: #include "nsIParser.h"
michael@0: #include "nsIDTD.h"
michael@0: #include "nsNetCID.h"
michael@0: #include "nsNetUtil.h"
michael@0: #include "nsParserCIID.h"
michael@0: #include "nsContentUtils.h"
michael@0: #include "nsIContentSink.h"
michael@0: #include "nsIDocumentEncoder.h"
michael@0: #include "nsIDOMDocumentFragment.h"
michael@0: #include "nsIFragmentContentSink.h"
michael@0: #include "nsIDOMDocument.h"
michael@0: #include "nsIDOMNodeList.h"
michael@0: #include "nsIDOMNode.h"
michael@0: #include "nsIDOMElement.h"
michael@0: #include "nsIDocument.h"
michael@0: #include "nsIContent.h"
michael@0: #include "nsAttrName.h"
michael@0: #include "nsHTMLParts.h"
michael@0: #include "nsContentCID.h"
michael@0: #include "nsIScriptableUnescapeHTML.h"
michael@0: #include "nsParserUtils.h"
michael@0: #include "nsAutoPtr.h"
michael@0: #include "nsTreeSanitizer.h"
michael@0: #include "nsHtml5Module.h"
michael@0: #include "mozilla/dom/DocumentFragment.h"
michael@0: 
michael@0: #define XHTML_DIV_TAG "div xmlns=\"http://www.w3.org/1999/xhtml\""
michael@0: 
michael@0: using namespace mozilla::dom;
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsParserUtils,
michael@0:                   nsIScriptableUnescapeHTML,
michael@0:                   nsIParserUtils)
michael@0: 
michael@0: static NS_DEFINE_CID(kCParserCID, NS_PARSER_CID);
michael@0: 
michael@0: 
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsParserUtils::ConvertToPlainText(const nsAString& aFromStr,
michael@0:                                   uint32_t aFlags,
michael@0:                                   uint32_t aWrapCol,
michael@0:                                   nsAString& aToStr)
michael@0: {
michael@0:   return nsContentUtils::ConvertToPlainText(aFromStr,
michael@0:     aToStr,
michael@0:     aFlags,
michael@0:     aWrapCol);
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsParserUtils::Unescape(const nsAString& aFromStr,
michael@0:                         nsAString& aToStr)
michael@0: {
michael@0:   return nsContentUtils::ConvertToPlainText(aFromStr,
michael@0:     aToStr,
michael@0:     nsIDocumentEncoder::OutputSelectionOnly |
michael@0:     nsIDocumentEncoder::OutputAbsoluteLinks,
michael@0:     0);
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsParserUtils::Sanitize(const nsAString& aFromStr,
michael@0:                         uint32_t aFlags,
michael@0:                         nsAString& aToStr)
michael@0: {
michael@0:   nsCOMPtr<nsIURI> uri;
michael@0:   NS_NewURI(getter_AddRefs(uri), "about:blank");
michael@0:   nsCOMPtr<nsIPrincipal> principal =
michael@0:     do_CreateInstance("@mozilla.org/nullprincipal;1");
michael@0:   nsCOMPtr<nsIDOMDocument> domDocument;
michael@0:   nsresult rv = NS_NewDOMDocument(getter_AddRefs(domDocument),
michael@0:                                   EmptyString(),
michael@0:                                   EmptyString(),
michael@0:                                   nullptr,
michael@0:                                   uri,
michael@0:                                   uri,
michael@0:                                   principal,
michael@0:                                   true,
michael@0:                                   nullptr,
michael@0:                                   DocumentFlavorHTML);
michael@0:   NS_ENSURE_SUCCESS(rv, rv);
michael@0: 
michael@0:   nsCOMPtr<nsIDocument> document = do_QueryInterface(domDocument);
michael@0:   rv = nsContentUtils::ParseDocumentHTML(aFromStr, document, false);
michael@0:   NS_ENSURE_SUCCESS(rv, rv);
michael@0: 
michael@0:   nsTreeSanitizer sanitizer(aFlags);
michael@0:   sanitizer.Sanitize(document);
michael@0: 
michael@0:   nsCOMPtr<nsIDocumentEncoder> encoder =
michael@0:     do_CreateInstance(NS_DOC_ENCODER_CONTRACTID_BASE "text/html");
michael@0: 
michael@0:   encoder->NativeInit(document,
michael@0:                       NS_LITERAL_STRING("text/html"),
michael@0:                       nsIDocumentEncoder::OutputDontRewriteEncodingDeclaration |
michael@0:                       nsIDocumentEncoder::OutputNoScriptContent |
michael@0:                       nsIDocumentEncoder::OutputEncodeBasicEntities |
michael@0:                       nsIDocumentEncoder::OutputLFLineBreak |
michael@0:                       nsIDocumentEncoder::OutputRaw);
michael@0: 
michael@0:   return encoder->EncodeToString(aToStr);
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsParserUtils::ParseFragment(const nsAString& aFragment,
michael@0:                              bool aIsXML,
michael@0:                              nsIURI* aBaseURI,
michael@0:                              nsIDOMElement* aContextElement,
michael@0:                              nsIDOMDocumentFragment** aReturn)
michael@0: {
michael@0:   return nsParserUtils::ParseFragment(aFragment,
michael@0:                                       0,
michael@0:                                       aIsXML,
michael@0:                                       aBaseURI,
michael@0:                                       aContextElement,
michael@0:                                       aReturn);
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsParserUtils::ParseFragment(const nsAString& aFragment,
michael@0:                              uint32_t aFlags,
michael@0:                              bool aIsXML,
michael@0:                              nsIURI* aBaseURI,
michael@0:                              nsIDOMElement* aContextElement,
michael@0:                              nsIDOMDocumentFragment** aReturn)
michael@0: {
michael@0:   NS_ENSURE_ARG(aContextElement);
michael@0:   *aReturn = nullptr;
michael@0: 
michael@0:   nsCOMPtr<nsIDocument> document;
michael@0:   nsCOMPtr<nsIDOMDocument> domDocument;
michael@0:   nsCOMPtr<nsIDOMNode> contextNode;
michael@0:   contextNode = do_QueryInterface(aContextElement);
michael@0:   contextNode->GetOwnerDocument(getter_AddRefs(domDocument));
michael@0:   document = do_QueryInterface(domDocument);
michael@0:   NS_ENSURE_TRUE(document, NS_ERROR_NOT_AVAILABLE);
michael@0: 
michael@0:   nsAutoScriptBlockerSuppressNodeRemoved autoBlocker;
michael@0: 
michael@0:   // stop scripts
michael@0:   nsRefPtr<nsScriptLoader> loader;
michael@0:   bool scripts_enabled = false;
michael@0:   if (document) {
michael@0:     loader = document->ScriptLoader();
michael@0:     scripts_enabled = loader->GetEnabled();
michael@0:   }
michael@0:   if (scripts_enabled) {
michael@0:     loader->SetEnabled(false);
michael@0:   }
michael@0: 
michael@0:   // Wrap things in a div or body for parsing, but it won't show up in
michael@0:   // the fragment.
michael@0:   nsAutoTArray<nsString, 2> tagStack;
michael@0:   nsAutoCString base, spec;
michael@0:   if (aIsXML) {
michael@0:     // XHTML
michael@0:     if (aBaseURI) {
michael@0:       base.Append(NS_LITERAL_CSTRING(XHTML_DIV_TAG));
michael@0:       base.Append(NS_LITERAL_CSTRING(" xml:base=\""));
michael@0:       aBaseURI->GetSpec(spec);
michael@0:       // nsEscapeHTML is good enough, because we only need to get
michael@0:       // quotes, ampersands, and angle brackets
michael@0:       char* escapedSpec = nsEscapeHTML(spec.get());
michael@0:       if (escapedSpec)
michael@0:         base += escapedSpec;
michael@0:       NS_Free(escapedSpec);
michael@0:       base.Append(NS_LITERAL_CSTRING("\""));
michael@0:       tagStack.AppendElement(NS_ConvertUTF8toUTF16(base));
michael@0:     }  else {
michael@0:       tagStack.AppendElement(NS_LITERAL_STRING(XHTML_DIV_TAG));
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   nsresult rv = NS_OK;
michael@0:   nsCOMPtr<nsIContent> fragment;
michael@0:   if (aIsXML) {
michael@0:     rv = nsContentUtils::ParseFragmentXML(aFragment,
michael@0:                                           document,
michael@0:                                           tagStack,
michael@0:                                           true,
michael@0:                                           aReturn);
michael@0:     fragment = do_QueryInterface(*aReturn);
michael@0:   } else {
michael@0:     NS_ADDREF(*aReturn = new DocumentFragment(document->NodeInfoManager()));
michael@0:     fragment = do_QueryInterface(*aReturn);
michael@0:     rv = nsContentUtils::ParseFragmentHTML(aFragment,
michael@0:                                            fragment,
michael@0:                                            nsGkAtoms::body,
michael@0:                                            kNameSpaceID_XHTML,
michael@0:                                            false,
michael@0:                                            true);
michael@0:     // Now, set the base URI on all subtree roots.
michael@0:     if (aBaseURI) {
michael@0:       aBaseURI->GetSpec(spec);
michael@0:       nsAutoString spec16;
michael@0:       CopyUTF8toUTF16(spec, spec16);
michael@0:       nsIContent* node = fragment->GetFirstChild();
michael@0:       while (node) {
michael@0:         if (node->IsElement()) {
michael@0:           node->SetAttr(kNameSpaceID_XML,
michael@0:                         nsGkAtoms::base,
michael@0:                         nsGkAtoms::xml,
michael@0:                         spec16,
michael@0:                         false);
michael@0:         }
michael@0:         node = node->GetNextSibling();
michael@0:       }
michael@0:     }
michael@0:   }
michael@0:   if (fragment) {
michael@0:     nsTreeSanitizer sanitizer(aFlags);
michael@0:     sanitizer.Sanitize(fragment);
michael@0:   }
michael@0: 
michael@0:   if (scripts_enabled) {
michael@0:     loader->SetEnabled(true);
michael@0:   }
michael@0: 
michael@0:   return rv;
michael@0: }