// This method is meant to match the HTML5 definition of "running a script"
// http://www.whatwg.org/specs/web-apps/current-work/multipage/scripting-1.html#running-a-script
void HTMLScriptRunner::runScript(Element* script, const TextPosition1& scriptStartPosition)
{
    ASSERT(m_document);
    ASSERT(!haveParsingBlockingScript());
    {
        InsertionPointRecord insertionPointRecord(m_host->inputStream());
        NestingLevelIncrementer nestingLevelIncrementer(m_scriptNestingLevel);

        ScriptElement* scriptElement = toScriptElement(script);
        ASSERT(scriptElement);

        scriptElement->prepareScript(scriptStartPosition);

        if (!scriptElement->willBeParserExecuted())
            return;

        if (scriptElement->willExecuteWhenDocumentFinishedParsing())
            requestDeferredScript(script);
        else if (scriptElement->readyToBeParserExecuted()) {
            if (m_scriptNestingLevel == 1) {
                m_parsingBlockingScript.setElement(script);
                m_parsingBlockingScript.setStartingPosition(scriptStartPosition);
            } else {
                ScriptSourceCode sourceCode(script->textContent(), documentURLForScriptExecution(m_document), scriptStartPosition);
                scriptElement->executeScript(sourceCode);
            }
        } else
            requestParsingBlockingScript(script);
    }
}
Esempio n. 2
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// This method is meant to match the HTML5 definition of "running a script"
// http://www.whatwg.org/specs/web-apps/current-work/multipage/scripting-1.html#running-a-script
void HTMLScriptRunner::runScript(Element* script, const TextPosition1& scriptStartPosition)
{
    ASSERT(m_document);
    ASSERT(!haveParsingBlockingScript());
    {
        InsertionPointRecord insertionPointRecord(m_host->inputStream());
        NestingLevelIncrementer nestingLevelIncrementer(m_scriptNestingLevel);

        ScriptElement* scriptElement = toScriptElement(script);
        ASSERT(scriptElement);
        if (!scriptElement->shouldExecuteAsJavaScript())
            return;
        
        if (script->hasAttribute(srcAttr)) {
            if (script->hasAttribute(asyncAttr)) // Async takes precendence over defer.
                return; // Asynchronous scripts handle themselves.

            if (script->hasAttribute(deferAttr))
                requestDeferredScript(script);
            else
                requestParsingBlockingScript(script);
        } else {
            // FIXME: We do not block inline <script> tags on stylesheets to match the
            // old parser for now.  When we do, the ASSERT below should be added.
            // See https://bugs.webkit.org/show_bug.cgi?id=40047
            // ASSERT(document()->haveStylesheetsLoaded());
            ASSERT(isExecutingScript());
            ScriptSourceCode sourceCode(script->textContent(), documentURLForScriptExecution(m_document), scriptStartPosition);
            scriptElement->executeScript(sourceCode);
        }
    }
}
void XMLDocumentParser::notifyFinished(CachedResource* unusedResource)
{
    ASSERT_UNUSED(unusedResource, unusedResource == m_pendingScript);
    ASSERT(m_pendingScript->accessCount() > 0);

    ScriptSourceCode sourceCode(m_pendingScript.get());
    bool errorOccurred = m_pendingScript->errorOccurred();
    bool wasCanceled = m_pendingScript->wasCanceled();

    m_pendingScript->removeClient(this);
    m_pendingScript = 0;

    RefPtr<Element> e = m_scriptElement;
    m_scriptElement = 0;

    ScriptElement* scriptElement = toScriptElement(e.get());
    ASSERT(scriptElement);

    // JavaScript can detach this parser, make sure it's kept alive even if detached.
    RefPtr<XMLDocumentParser> protect(this);
    
    if (errorOccurred)
        scriptElement->dispatchErrorEvent();
    else if (!wasCanceled) {
        scriptElement->executeScript(sourceCode);
        scriptElement->dispatchLoadEvent();
    }

    m_scriptElement = 0;

    if (!isDetached() && !m_requestingScript)
        resumeParsing();
}
Esempio n. 4
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void XMLDocumentParser::parseEndElement()
{
    exitText();

    RefPtr<ContainerNode> n = m_currentNode;
    n->finishParsingChildren();

    if (!scriptingContentIsAllowed(m_scriptingPermission) && n->isElementNode() && toScriptElement(static_cast<Element*>(n.get()))) {
        popCurrentNode();
        ExceptionCode ec;
        n->remove(ec);
        return;
    }

    if (!n->isElementNode() || !m_view) {
        if (!m_currentNodeStack.isEmpty())
            popCurrentNode();
        return;
    }

    Element* element = static_cast<Element*>(n.get());

    // The element's parent may have already been removed from document.
    // Parsing continues in this case, but scripts aren't executed.
    if (!element->inDocument()) {
        popCurrentNode();
        return;
    }

    ScriptElement* scriptElement = toScriptElement(element);
    if (!scriptElement) {
        popCurrentNode();
        return;
    }

    // don't load external scripts for standalone documents (for now)
    ASSERT(!m_pendingScript);
    m_requestingScript = true;

    if (scriptElement->prepareScript(m_scriptStartPosition, ScriptElement::AllowLegacyTypeInTypeAttribute)) {
        if (scriptElement->readyToBeParserExecuted())
            scriptElement->executeScript(ScriptSourceCode(scriptElement->scriptContent(), document()->url(), m_scriptStartPosition));
        else if (scriptElement->willBeParserExecuted()) {
            m_pendingScript = scriptElement->cachedScript();
            m_scriptElement = element;
            m_pendingScript->addClient(this);

            // m_pendingScript will be 0 if script was already loaded and addClient() executed it.
            if (m_pendingScript)
                pauseParsing();
        } else
            m_scriptElement = 0;
    }
    m_requestingScript = false;
    popCurrentNode();
}
Esempio n. 5
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// This method is meant to match the HTML5 definition of "running a script"
// http://www.whatwg.org/specs/web-apps/current-work/multipage/scripting-1.html#running-a-script
void HTMLScriptRunner::runScript(Element* script, const TextPosition& scriptStartPosition)
{
    ASSERT(m_document);
    ASSERT(!hasParserBlockingScript());
    {
        ScriptElement* scriptElement = toScriptElement(script);

        // This contains both and ASSERTION and a null check since we should not
        // be getting into the case of a null script element, but seem to be from
        // time to time. The assertion is left in to help find those cases and
        // is being tracked by <https://bugs.webkit.org/show_bug.cgi?id=60559>.
        ASSERT(scriptElement);
        if (!scriptElement)
            return;

        // FIXME: This may be too agressive as we always deliver mutations at
        // every script element, even if it's not ready to execute yet. There's
        // unfortuantely no obvious way to tell if prepareScript is going to
        // execute the script from out here.
        if (!isExecutingScript()) {
#if ENABLE(CUSTOM_ELEMENTS)
            CustomElementRegistry::deliverAllLifecycleCallbacks();
#endif
            MutationObserver::deliverAllMutations();
        }

        InsertionPointRecord insertionPointRecord(m_host->inputStream());
        NestingLevelIncrementer nestingLevelIncrementer(m_scriptNestingLevel);

        scriptElement->prepareScript(scriptStartPosition);

        if (!scriptElement->willBeParserExecuted())
            return;

        if (scriptElement->willExecuteWhenDocumentFinishedParsing())
            requestDeferredScript(script);
        else if (scriptElement->readyToBeParserExecuted()) {
            if (m_scriptNestingLevel == 1) {
                m_parserBlockingScript.setElement(script);
                m_parserBlockingScript.setStartingPosition(scriptStartPosition);
            } else {
                ScriptSourceCode sourceCode(script->textContent(), documentURLForScriptExecution(m_document), scriptStartPosition);
                scriptElement->executeScript(sourceCode);
            }
        } else
            requestParsingBlockingScript(script);
    }
}
Esempio n. 6
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// This method is meant to match the HTML5 definition of "running a script"
// http://www.whatwg.org/specs/web-apps/current-work/multipage/scripting-1.html#running-a-script
void HTMLScriptRunner::runScript(Element* script, const TextPosition1& scriptStartPosition)
{
    ASSERT(m_document);
    ASSERT(!haveParsingBlockingScript());
    {
        InsertionPointRecord insertionPointRecord(m_host->inputStream());
        NestingLevelIncrementer nestingLevelIncrementer(m_scriptNestingLevel);

        ScriptElement* scriptElement = toScriptElement(script);

        // This contains both and ASSERTION and a null check since we should not
        // be getting into the case of a null script element, but seem to be from
        // time to time. The assertion is left in to help find those cases and
        // is being tracked by <https://bugs.webkit.org/show_bug.cgi?id=60559>.
        ASSERT(scriptElement);
        if (!scriptElement)
            return;

        scriptElement->prepareScript(scriptStartPosition);

        if (!scriptElement->willBeParserExecuted())
            return;

        if (scriptElement->willExecuteWhenDocumentFinishedParsing())
            requestDeferredScript(script);
        else if (scriptElement->readyToBeParserExecuted()) {
            if (m_scriptNestingLevel == 1) {
                m_parsingBlockingScript.setElement(script);
                m_parsingBlockingScript.setStartingPosition(scriptStartPosition);
            } else {
                ScriptSourceCode sourceCode(script->textContent(), documentURLForScriptExecution(m_document), scriptStartPosition);
                scriptElement->executeScript(sourceCode);
            }
        } else
            requestParsingBlockingScript(script);
    }
}
void XMLDocumentParser::endElementNs()
{
    if (isStopped())
        return;

    if (m_parserPaused) {
        m_pendingCallbacks->appendEndElementNSCallback();
        return;
    }

    // JavaScript can detach the parser.  Make sure this is not released
    // before the end of this method.
    RefPtr<XMLDocumentParser> protect(this);

    exitText();

    RefPtr<ContainerNode> n = m_currentNode;
    n->finishParsingChildren();

    if (m_scriptingPermission == FragmentScriptingNotAllowed && n->isElementNode() && toScriptElement(static_cast<Element*>(n.get()))) {
        popCurrentNode();
        ExceptionCode ec;
        n->remove(ec);
        return;
    }

    if (!n->isElementNode() || !m_view) {
        popCurrentNode();
        return;
    }

    Element* element = static_cast<Element*>(n.get());

    // The element's parent may have already been removed from document.
    // Parsing continues in this case, but scripts aren't executed.
    if (!element->inDocument()) {
        popCurrentNode();
        return;
    }

    ScriptElement* scriptElement = toScriptElement(element);
    if (!scriptElement) {
        popCurrentNode();
        return;
    }

    // Don't load external scripts for standalone documents (for now).
    ASSERT(!m_pendingScript);
    m_requestingScript = true;

    if (scriptElement->prepareScript(m_scriptStartPosition, ScriptElement::AllowLegacyTypeInTypeAttribute)) {
        // FIXME: Script execution should be shared between
        // the libxml2 and Qt XMLDocumentParser implementations.

        if (scriptElement->readyToBeParserExecuted())
            scriptElement->executeScript(ScriptSourceCode(scriptElement->scriptContent(), document()->url(), m_scriptStartPosition));
        else if (scriptElement->willBeParserExecuted()) {
            m_pendingScript = scriptElement->cachedScript();
            m_scriptElement = element;
            m_pendingScript->addClient(this);

            // m_pendingScript will be 0 if script was already loaded and addClient() executed it.
            if (m_pendingScript)
                pauseParsing();
        } else
            m_scriptElement = 0;

        // JavaScript may have detached the parser
        if (isDetached())
            return;
    }
    m_requestingScript = false;
    popCurrentNode();
}
void XMLDocumentParser::endElementNs()
{
    if (isStopped())
        return;

    if (m_parserPaused) {
        m_pendingCallbacks->appendEndElementNSCallback();
        return;
    }

    exitText();

    Node* n = m_currentNode;
    n->finishParsingChildren();

    if (m_scriptingPermission == FragmentScriptingNotAllowed && n->isElementNode() && toScriptElement(static_cast<Element*>(n))) {
        popCurrentNode();
        ExceptionCode ec;
        n->remove(ec);
        return;
    }

    if (!n->isElementNode() || !m_view) {
        popCurrentNode();
        return;
    }

    Element* element = static_cast<Element*>(n);

    // The element's parent may have already been removed from document.
    // Parsing continues in this case, but scripts aren't executed.
    if (!element->inDocument()) {
        popCurrentNode();
        return;
    }

    ScriptElement* scriptElement = toScriptElement(element);
    if (!scriptElement) {
        popCurrentNode();
        return;
    }

    // Don't load external scripts for standalone documents (for now).
    ASSERT(!m_pendingScript);
    m_requestingScript = true;

#if ENABLE(XHTMLMP)
    if (!scriptElement->shouldExecuteAsJavaScript())
        document()->setShouldProcessNoscriptElement(true);
    else
#endif
    {
        // FIXME: Script execution should be shared should be shared between
        // the libxml2 and Qt XMLDocumentParser implementations.

        // JavaScript can detach the parser.  Make sure this is not released
        // before the end of this method.
        RefPtr<XMLDocumentParser> protect(this);

        String scriptHref = scriptElement->sourceAttributeValue();
        if (!scriptHref.isEmpty()) {
            // we have a src attribute
            String scriptCharset = scriptElement->scriptCharset();
            if (element->dispatchBeforeLoadEvent(scriptHref) &&
                (m_pendingScript = document()->cachedResourceLoader()->requestScript(scriptHref, scriptCharset))) {
                m_scriptElement = element;
                m_pendingScript->addClient(this);

                // m_pendingScript will be 0 if script was already loaded and ref() executed it
                if (m_pendingScript)
                    pauseParsing();
            } else
                m_scriptElement = 0;
        } else
            scriptElement->executeScript(ScriptSourceCode(scriptElement->scriptContent(), document()->url(), m_scriptStartPosition));

        // JavaScript may have detached the parser
        if (isDetached())
            return;
    }
    m_requestingScript = false;
    popCurrentNode();
}