/* * Copyright (C) 2010 Google, Inc. All Rights Reserved. * Copyright (C) 2010-2017 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #pragma once #include "PendingScript.h" #include <wtf/Deque.h> #include <wtf/WeakPtr.h> #include <wtf/text/TextPosition.h> namespace WebCore { class Document; class Frame; class HTMLScriptRunnerHost; class ScriptSourceCode; class HTMLScriptRunner { WTF_MAKE_FAST_ALLOCATED; public: HTMLScriptRunner(Document&, HTMLScriptRunnerHost&); ~HTMLScriptRunner(); void detach(); // Processes the passed in script and any pending scripts if possible. void execute(Ref<ScriptElement>&&, const TextPosition& scriptStartPosition); void executeScriptsWaitingForLoad(PendingScript&); bool hasScriptsWaitingForStylesheets() const { return m_hasScriptsWaitingForStylesheets; } void executeScriptsWaitingForStylesheets(); bool executeScriptsWaitingForParsing(); bool hasParserBlockingScript() const; bool isExecutingScript() const { return !!m_scriptNestingLevel; } private: Frame* frame() const; void executePendingScriptAndDispatchEvent(PendingScript&); void executeParsingBlockingScripts(); void requestParsingBlockingScript(ScriptElement&); void requestDeferredScript(ScriptElement&); void runScript(ScriptElement&, const TextPosition& scriptStartPosition); void watchForLoad(PendingScript&); void stopWatchingForLoad(PendingScript&); bool isPendingScriptReady(const PendingScript&); WeakPtr<Document> m_document; HTMLScriptRunnerHost& m_host; RefPtr<PendingScript> m_parserBlockingScript; Deque<Ref<PendingScript>> m_scriptsToExecuteAfterParsing; // http://www.whatwg.org/specs/web-apps/current-work/#list-of-scripts-that-will-execute-when-the-document-has-finished-parsing unsigned m_scriptNestingLevel; // We only want stylesheet loads to trigger script execution if script // execution is currently stopped due to stylesheet loads, otherwise we'd // cause nested script execution when parsing <style> tags since </style> // tags can cause Document to call executeScriptsWaitingForStylesheets. bool m_hasScriptsWaitingForStylesheets; }; } // namespace WebCore