1 files changed, 127 insertions, 0 deletions
diff --git a/parser/html/nsParserUtils.cpp b/parser/html/nsParserUtils.cpp
new file mode 100644
index 0000000000..74b86febe8
--- /dev/null
+++ b/parser/html/nsParserUtils.cpp
@@ -0,0 +1,127 @@
+/* -*- Mode: C++; tab-width: 8; 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 "nsParserUtils.h"
+#include "mozilla/NullPrincipal.h"
+#include "mozilla/UniquePtr.h"
+#include "mozilla/dom/DocumentFragment.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/ScriptLoader.h"
+#include "nsAttrName.h"
+#include "nsCOMPtr.h"
+#include "nsContentCID.h"
+#include "nsContentUtils.h"
+#include "nsEscape.h"
+#include "nsHTMLParts.h"
+#include "nsHtml5Module.h"
+#include "nsIContent.h"
+#include "nsIContentSink.h"
+#include "nsIDTD.h"
+#include "mozilla/dom/Document.h"
+#include "nsIDocumentEncoder.h"
+#include "nsIFragmentContentSink.h"
+#include "nsIParser.h"
+#include "nsNetCID.h"
+#include "nsNetUtil.h"
+#include "nsString.h"
+#include "nsTreeSanitizer.h"
+#include "nsXPCOM.h"
+
+#define XHTML_DIV_TAG u"div xmlns=\"http://www.w3.org/1999/xhtml\""
+
+using namespace mozilla::dom;
+
+NS_IMPL_ISUPPORTS(nsParserUtils, nsIParserUtils)
+
+NS_IMETHODIMP
+nsParserUtils::ConvertToPlainText(const nsAString& aFromStr, uint32_t aFlags,
+                                  uint32_t aWrapCol, nsAString& aToStr) {
+  return nsContentUtils::ConvertToPlainText(aFromStr, aToStr, aFlags, aWrapCol);
+}
+
+template <typename Callable>
+static nsresult SanitizeWith(const nsAString& aInput, nsAString& aOutput,
+                             Callable aDoSanitize) {
+  RefPtr<Document> document = nsContentUtils::CreateInertHTMLDocument(nullptr);
+  if (!document) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsresult rv = nsContentUtils::ParseDocumentHTML(aInput, document, false);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  aDoSanitize(document.get());
+
+  nsCOMPtr<nsIDocumentEncoder> encoder = do_createDocumentEncoder("text/html");
+  encoder->NativeInit(document, u"text/html"_ns,
+                      nsIDocumentEncoder::OutputDontRewriteEncodingDeclaration |
+                          nsIDocumentEncoder::OutputNoScriptContent |
+                          nsIDocumentEncoder::OutputEncodeBasicEntities |
+                          nsIDocumentEncoder::OutputLFLineBreak |
+                          nsIDocumentEncoder::OutputRaw);
+  return encoder->EncodeToString(aOutput);
+}
+
+NS_IMETHODIMP
+nsParserUtils::Sanitize(const nsAString& aFromStr, uint32_t aFlags,
+                        nsAString& aToStr) {
+  return SanitizeWith(aFromStr, aToStr, [&](Document* aDocument) {
+    nsTreeSanitizer sanitizer(aFlags);
+    sanitizer.Sanitize(aDocument);
+  });
+}
+
+NS_IMETHODIMP
+nsParserUtils::RemoveConditionalCSS(const nsAString& aFromStr,
+                                    nsAString& aToStr) {
+  return SanitizeWith(aFromStr, aToStr, [](Document* aDocument) {
+    nsTreeSanitizer::RemoveConditionalCSSFromSubtree(aDocument);
+  });
+}
+
+NS_IMETHODIMP
+nsParserUtils::ParseFragment(const nsAString& aFragment, uint32_t aFlags,
+                             bool aIsXML, nsIURI* aBaseURI,
+                             Element* aContextElement,
+                             DocumentFragment** aReturn) {
+  NS_ENSURE_ARG(aContextElement);
+  *aReturn = nullptr;
+
+  RefPtr<Document> document = aContextElement->OwnerDoc();
+
+  nsAutoScriptBlockerSuppressNodeRemoved autoBlocker;
+
+  // stop scripts
+  RefPtr<ScriptLoader> loader = document->ScriptLoader();
+  bool scripts_enabled = loader->GetEnabled();
+  if (scripts_enabled) {
+    loader->SetEnabled(false);
+  }
+
+  // Wrap things in a div or body for parsing, but it won't show up in
+  // the fragment.
+  nsresult rv = NS_OK;
+  AutoTArray<nsString, 2> tagStack;
+  RefPtr<DocumentFragment> fragment;
+  if (aIsXML) {
+    // XHTML
+    tagStack.AppendElement(nsLiteralString(XHTML_DIV_TAG));
+    rv = nsContentUtils::ParseFragmentXML(aFragment, document, tagStack, true,
+                                          aFlags, getter_AddRefs(fragment));
+  } else {
+    fragment = new (document->NodeInfoManager())
+        DocumentFragment(document->NodeInfoManager());
+    rv = nsContentUtils::ParseFragmentHTML(aFragment, fragment, nsGkAtoms::body,
+                                           kNameSpaceID_XHTML, false, true,
+                                           aFlags);
+  }
+
+  if (scripts_enabled) {
+    loader->SetEnabled(true);
+  }
+
+  fragment.forget(aReturn);
+  return rv;
+}