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diff --git a/dom/base/nsIScriptElement.h b/dom/base/nsIScriptElement.h
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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/. */
+
+#ifndef nsIScriptElement_h___
+#define nsIScriptElement_h___
+
+#include "nsISupports.h"
+#include "nsIURI.h"
+#include "nsCOMPtr.h"
+#include "nsIScriptLoaderObserver.h"
+#include "nsWeakPtr.h"
+#include "nsIParser.h"
+#include "nsContentCreatorFunctions.h"
+#include "nsIDOMHTMLScriptElement.h"
+#include "mozilla/CORSMode.h"
+
+#define NS_ISCRIPTELEMENT_IID \
+{ 0xe60fca9b, 0x1b96, 0x4e4e, \
+ { 0xa9, 0xb4, 0xdc, 0x98, 0x4f, 0x88, 0x3f, 0x9c } }
+
+/**
+ * Internal interface implemented by script elements
+ */
+class nsIScriptElement : public nsIScriptLoaderObserver {
+public:
+ NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISCRIPTELEMENT_IID)
+
+ explicit nsIScriptElement(mozilla::dom::FromParser aFromParser)
+ : mLineNumber(1),
+ mAlreadyStarted(false),
+ mMalformed(false),
+ mDoneAddingChildren(aFromParser == mozilla::dom::NOT_FROM_PARSER ||
+ aFromParser == mozilla::dom::FROM_PARSER_FRAGMENT),
+ mForceAsync(aFromParser == mozilla::dom::NOT_FROM_PARSER ||
+ aFromParser == mozilla::dom::FROM_PARSER_FRAGMENT),
+ mFrozen(false),
+ mDefer(false),
+ mAsync(false),
+ mExternal(false),
+ mParserCreated(aFromParser == mozilla::dom::FROM_PARSER_FRAGMENT ?
+ mozilla::dom::NOT_FROM_PARSER : aFromParser),
+ // Fragment parser-created scripts (if executable)
+ // behave like script-created scripts.
+ mCreatorParser(nullptr)
+ {
+ }
+
+ /**
+ * Content type identifying the scripting language. Can be empty, in
+ * which case javascript will be assumed.
+ * Return false if type attribute is not found.
+ */
+ virtual bool GetScriptType(nsAString& type) = 0;
+
+ /**
+ * Location of script source text. Can return null, in which case
+ * this is assumed to be an inline script element.
+ */
+ nsIURI* GetScriptURI()
+ {
+ NS_PRECONDITION(mFrozen, "Not ready for this call yet!");
+ return mUri;
+ }
+
+ /**
+ * Script source text for inline script elements.
+ */
+ virtual void GetScriptText(nsAString& text) = 0;
+
+ virtual void GetScriptCharset(nsAString& charset) = 0;
+
+ /**
+ * Freezes the return values of GetScriptDeferred(), GetScriptAsync() and
+ * GetScriptURI() so that subsequent modifications to the attributes don't
+ * change execution behavior.
+ */
+ virtual void FreezeUriAsyncDefer() = 0;
+
+ /**
+ * Is the script deferred. Currently only supported by HTML scripts.
+ */
+ bool GetScriptDeferred()
+ {
+ NS_PRECONDITION(mFrozen, "Not ready for this call yet!");
+ return mDefer;
+ }
+
+ /**
+ * Is the script async. Currently only supported by HTML scripts.
+ */
+ bool GetScriptAsync()
+ {
+ NS_PRECONDITION(mFrozen, "Not ready for this call yet!");
+ return mAsync;
+ }
+
+ /**
+ * Is the script an external script?
+ */
+ bool GetScriptExternal()
+ {
+ NS_PRECONDITION(mFrozen, "Not ready for this call yet!");
+ return mExternal;
+ }
+
+ /**
+ * Returns how the element was created.
+ */
+ mozilla::dom::FromParser GetParserCreated()
+ {
+ return mParserCreated;
+ }
+
+ void SetScriptLineNumber(uint32_t aLineNumber)
+ {
+ mLineNumber = aLineNumber;
+ }
+ uint32_t GetScriptLineNumber()
+ {
+ return mLineNumber;
+ }
+
+ void SetIsMalformed()
+ {
+ mMalformed = true;
+ }
+ bool IsMalformed()
+ {
+ return mMalformed;
+ }
+
+ void PreventExecution()
+ {
+ mAlreadyStarted = true;
+ }
+
+ void LoseParserInsertedness()
+ {
+ mFrozen = false;
+ mUri = nullptr;
+ mCreatorParser = nullptr;
+ mParserCreated = mozilla::dom::NOT_FROM_PARSER;
+ bool async = false;
+ nsCOMPtr<nsIDOMHTMLScriptElement> htmlScript = do_QueryInterface(this);
+ if (htmlScript) {
+ htmlScript->GetAsync(&async);
+ }
+ mForceAsync = !async;
+ }
+
+ void SetCreatorParser(nsIParser* aParser)
+ {
+ mCreatorParser = do_GetWeakReference(aParser);
+ }
+
+ /**
+ * Unblocks the creator parser
+ */
+ void UnblockParser()
+ {
+ nsCOMPtr<nsIParser> parser = do_QueryReferent(mCreatorParser);
+ if (parser) {
+ parser->UnblockParser();
+ }
+ }
+
+ /**
+ * Attempts to resume parsing asynchronously
+ */
+ void ContinueParserAsync()
+ {
+ nsCOMPtr<nsIParser> parser = do_QueryReferent(mCreatorParser);
+ if (parser) {
+ parser->ContinueInterruptedParsingAsync();
+ }
+ }
+
+ /**
+ * Informs the creator parser that the evaluation of this script is starting
+ */
+ void BeginEvaluating()
+ {
+ nsCOMPtr<nsIParser> parser = do_QueryReferent(mCreatorParser);
+ if (parser) {
+ parser->PushDefinedInsertionPoint();
+ }
+ }
+
+ /**
+ * Informs the creator parser that the evaluation of this script is ending
+ */
+ void EndEvaluating()
+ {
+ nsCOMPtr<nsIParser> parser = do_QueryReferent(mCreatorParser);
+ if (parser) {
+ parser->PopDefinedInsertionPoint();
+ }
+ }
+
+ /**
+ * Retrieves a pointer to the creator parser if this has one or null if not
+ */
+ already_AddRefed<nsIParser> GetCreatorParser()
+ {
+ nsCOMPtr<nsIParser> parser = do_QueryReferent(mCreatorParser);
+ return parser.forget();
+ }
+
+ /**
+ * This method is called when the parser finishes creating the script
+ * element's children, if any are present.
+ *
+ * @return whether the parser will be blocked while this script is being
+ * loaded
+ */
+ bool AttemptToExecute()
+ {
+ mDoneAddingChildren = true;
+ bool block = MaybeProcessScript();
+ if (!mAlreadyStarted) {
+ // Need to lose parser-insertedness here to allow another script to cause
+ // execution later.
+ LoseParserInsertedness();
+ }
+ return block;
+ }
+
+ /**
+ * Get the CORS mode of the script element
+ */
+ virtual mozilla::CORSMode GetCORSMode() const
+ {
+ /* Default to no CORS */
+ return mozilla::CORS_NONE;
+ }
+
+ /**
+ * Fire an error event
+ */
+ virtual nsresult FireErrorEvent() = 0;
+
+protected:
+ /**
+ * Processes the script if it's in the document-tree and links to or
+ * contains a script. Once it has been evaluated there is no way to make it
+ * reevaluate the script, you'll have to create a new element. This also means
+ * that when adding a src attribute to an element that already contains an
+ * inline script, the script referenced by the src attribute will not be
+ * loaded.
+ *
+ * In order to be able to use multiple childNodes, or to use the
+ * fallback mechanism of using both inline script and linked script you have
+ * to add all attributes and childNodes before adding the element to the
+ * document-tree.
+ *
+ * @return whether the parser will be blocked while this script is being
+ * loaded
+ */
+ virtual bool MaybeProcessScript() = 0;
+
+ /**
+ * The start line number of the script.
+ */
+ uint32_t mLineNumber;
+
+ /**
+ * The "already started" flag per HTML5.
+ */
+ bool mAlreadyStarted;
+
+ /**
+ * The script didn't have an end tag.
+ */
+ bool mMalformed;
+
+ /**
+ * False if parser-inserted but the parser hasn't triggered running yet.
+ */
+ bool mDoneAddingChildren;
+
+ /**
+ * If true, the .async property returns true instead of reflecting the
+ * content attribute.
+ */
+ bool mForceAsync;
+
+ /**
+ * Whether src, defer and async are frozen.
+ */
+ bool mFrozen;
+
+ /**
+ * The effective deferredness.
+ */
+ bool mDefer;
+
+ /**
+ * The effective asyncness.
+ */
+ bool mAsync;
+
+ /**
+ * The effective externalness. A script can be external with mUri being null
+ * if the src attribute contained an invalid URL string.
+ */
+ bool mExternal;
+
+ /**
+ * Whether this element was parser-created.
+ */
+ mozilla::dom::FromParser mParserCreated;
+
+ /**
+ * The effective src (or null if no src).
+ */
+ nsCOMPtr<nsIURI> mUri;
+
+ /**
+ * The creator parser of a non-defer, non-async parser-inserted script.
+ */
+ nsWeakPtr mCreatorParser;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(nsIScriptElement, NS_ISCRIPTELEMENT_IID)
+
+#endif // nsIScriptElement_h___