// http://dev.w3.org/html5/spec/Overview.html#prepare-a-script
bool ScriptLoader::prepareScript(const TextPosition& scriptStartPosition, LegacyTypeSupport supportLegacyTypes)
{
if (m_alreadyStarted)
return false;
ScriptLoaderClient* client = this->client();
bool wasParserInserted;
if (m_parserInserted) {
wasParserInserted = true;
m_parserInserted = false;
} else {
wasParserInserted = false;
}
if (wasParserInserted && !client->asyncAttributeValue())
m_forceAsync = true;
// FIXME: HTML5 spec says we should check that all children are either comments or empty text nodes.
if (!client->hasSourceAttribute() && !m_element->hasChildren())
return false;
if (!m_element->inDocument())
return false;
if (!isScriptTypeSupported(supportLegacyTypes))
return false;
if (wasParserInserted) {
m_parserInserted = true;
m_forceAsync = false;
}
m_alreadyStarted = true;
// FIXME: If script is parser inserted, verify it's still in the original document.
Document& elementDocument = m_element->document();
Document* contextDocument = elementDocument.contextDocument().get();
if (!contextDocument || !contextDocument->allowExecutingScripts(m_element))
return false;
if (!isScriptForEventSupported())
return false;
if (!client->charsetAttributeValue().isEmpty())
m_characterEncoding = client->charsetAttributeValue();
else
m_characterEncoding = elementDocument.characterSet();
if (client->hasSourceAttribute()) {
FetchRequest::DeferOption defer = FetchRequest::NoDefer;
if (!m_parserInserted || client->asyncAttributeValue() || client->deferAttributeValue())
defer = FetchRequest::LazyLoad;
if (!fetchScript(client->sourceAttributeValue(), defer))
return false;
}
if (client->hasSourceAttribute() && client->deferAttributeValue() && m_parserInserted && !client->asyncAttributeValue()) {
m_willExecuteWhenDocumentFinishedParsing = true;
m_willBeParserExecuted = true;
} else if (client->hasSourceAttribute() && m_parserInserted && !client->asyncAttributeValue()) {
m_willBeParserExecuted = true;
} else if (!client->hasSourceAttribute() && m_parserInserted && !elementDocument.isRenderingReady()) {
m_willBeParserExecuted = true;
m_readyToBeParserExecuted = true;
} else if (client->hasSourceAttribute() && !client->asyncAttributeValue() && !m_forceAsync) {
m_willExecuteInOrder = true;
m_pendingScript = PendingScript(m_element, m_resource.get());
contextDocument->scriptRunner()->queueScriptForExecution(this, ScriptRunner::IN_ORDER_EXECUTION);
// Note that watchForLoad can immediately call notifyFinished.
m_pendingScript.watchForLoad(this);
} else if (client->hasSourceAttribute()) {
m_pendingScript = PendingScript(m_element, m_resource.get());
LocalFrame* frame = m_element->document().frame();
if (frame) {
ScriptState* scriptState = ScriptState::forMainWorld(frame);
if (scriptState->contextIsValid())
ScriptStreamer::startStreaming(m_pendingScript, PendingScript::Async, frame->settings(), scriptState, frame->frameScheduler()->loadingTaskRunner());
}
contextDocument->scriptRunner()->queueScriptForExecution(this, ScriptRunner::ASYNC_EXECUTION);
// Note that watchForLoad can immediately call notifyFinished.
m_pendingScript.watchForLoad(this);
} else {
// Reset line numbering for nested writes.
TextPosition position = elementDocument.isInDocumentWrite() ? TextPosition() : scriptStartPosition;
KURL scriptURL = (!elementDocument.isInDocumentWrite() && m_parserInserted) ? elementDocument.url() : KURL();
if (!executeScript(ScriptSourceCode(scriptContent(), scriptURL, position))) {
dispatchErrorEvent();
return false;
}
}
return true;
}
// http://dev.w3.org/html5/spec/Overview.html#prepare-a-script
bool ScriptElement::prepareScript(const TextPosition& scriptStartPosition, LegacyTypeSupport supportLegacyTypes)
{
if (m_alreadyStarted)
return false;
bool wasParserInserted;
if (m_parserInserted) {
wasParserInserted = true;
m_parserInserted = false;
} else
wasParserInserted = false;
if (wasParserInserted && !asyncAttributeValue())
m_forceAsync = true;
// FIXME: HTML5 spec says we should check that all children are either comments or empty text nodes.
if (!hasSourceAttribute() && !m_element->firstChild())
return false;
if (!m_element->inDocument())
return false;
if (!isScriptTypeSupported(supportLegacyTypes))
return false;
if (wasParserInserted) {
m_parserInserted = true;
m_forceAsync = false;
}
m_alreadyStarted = true;
// FIXME: If script is parser inserted, verify it's still in the original document.
Document* document = m_element->document();
// FIXME: Eventually we'd like to evaluate scripts which are inserted into a
// viewless document but this'll do for now.
// See http://bugs.webkit.org/show_bug.cgi?id=5727
if (!document->frame())
return false;
if (!document->frame()->script()->canExecuteScripts(AboutToExecuteScript))
return false;
if (!isScriptForEventSupported())
return false;
if (!charsetAttributeValue().isEmpty())
m_characterEncoding = charsetAttributeValue();
else
m_characterEncoding = document->charset();
if (hasSourceAttribute())
if (!requestScript(sourceAttributeValue()))
return false;
if (hasSourceAttribute() && deferAttributeValue() && m_parserInserted && !asyncAttributeValue()) {
m_willExecuteWhenDocumentFinishedParsing = true;
m_willBeParserExecuted = true;
} else if (hasSourceAttribute() && m_parserInserted && !asyncAttributeValue())
m_willBeParserExecuted = true;
else if (!hasSourceAttribute() && m_parserInserted && !document->haveStylesheetsLoaded()) {
m_willBeParserExecuted = true;
m_readyToBeParserExecuted = true;
} else if (hasSourceAttribute() && !asyncAttributeValue() && !m_forceAsync) {
m_willExecuteInOrder = true;
document->scriptRunner()->queueScriptForExecution(this, m_cachedScript, ScriptRunner::IN_ORDER_EXECUTION);
m_cachedScript->addClient(this);
} else if (hasSourceAttribute()) {
m_element->document()->scriptRunner()->queueScriptForExecution(this, m_cachedScript, ScriptRunner::ASYNC_EXECUTION);
m_cachedScript->addClient(this);
} else {
// Reset line numbering for nested writes.
TextPosition position = document->isInDocumentWrite() ? TextPosition() : scriptStartPosition;
executeScript(ScriptSourceCode(scriptContent(), document->url(), position));
}
return true;
}
// http://dev.w3.org/html5/spec/Overview.html#prepare-a-script
bool ScriptLoader::prepareScript(const TextPosition& scriptStartPosition,
LegacyTypeSupport supportLegacyTypes) {
if (m_alreadyStarted)
return false;
ScriptLoaderClient* client = this->client();
bool wasParserInserted;
if (m_parserInserted) {
wasParserInserted = true;
m_parserInserted = false;
} else {
wasParserInserted = false;
}
if (wasParserInserted && !client->asyncAttributeValue())
m_forceAsync = true;
// FIXME: HTML5 spec says we should check that all children are either
// comments or empty text nodes.
if (!client->hasSourceAttribute() && !m_element->hasChildren())
return false;
if (!m_element->isConnected())
return false;
if (!isScriptTypeSupported(supportLegacyTypes))
return false;
if (wasParserInserted) {
m_parserInserted = true;
m_forceAsync = false;
}
m_alreadyStarted = true;
// FIXME: If script is parser inserted, verify it's still in the original
// document.
Document& elementDocument = m_element->document();
Document* contextDocument = elementDocument.contextDocument();
if (!contextDocument || !contextDocument->allowExecutingScripts(m_element))
return false;
if (!isScriptForEventSupported())
return false;
if (!client->charsetAttributeValue().isEmpty())
m_characterEncoding = client->charsetAttributeValue();
else
m_characterEncoding = elementDocument.characterSet();
if (client->hasSourceAttribute()) {
FetchRequest::DeferOption defer = FetchRequest::NoDefer;
if (!m_parserInserted || client->asyncAttributeValue() ||
client->deferAttributeValue())
defer = FetchRequest::LazyLoad;
if (m_documentWriteIntervention ==
DocumentWriteIntervention::FetchDocWrittenScriptDeferIdle)
defer = FetchRequest::IdleLoad;
if (!fetchScript(client->sourceAttributeValue(), defer))
return false;
}
// Since the asynchronous, low priority fetch for doc.written blocked
// script is not for execution, return early from here. Watch for its
// completion to be able to remove it from the memory cache.
if (m_documentWriteIntervention ==
DocumentWriteIntervention::FetchDocWrittenScriptDeferIdle) {
m_pendingScript = PendingScript::create(m_element, m_resource.get());
m_pendingScript->watchForLoad(this);
return true;
}
if (client->hasSourceAttribute() && client->deferAttributeValue() &&
m_parserInserted && !client->asyncAttributeValue()) {
m_willExecuteWhenDocumentFinishedParsing = true;
m_willBeParserExecuted = true;
} else if (client->hasSourceAttribute() && m_parserInserted &&
!client->asyncAttributeValue()) {
m_willBeParserExecuted = true;
} else if (!client->hasSourceAttribute() && m_parserInserted &&
!elementDocument.isScriptExecutionReady()) {
m_willBeParserExecuted = true;
m_readyToBeParserExecuted = true;
} else if (client->hasSourceAttribute() && !client->asyncAttributeValue() &&
!m_forceAsync) {
m_pendingScript = PendingScript::create(m_element, m_resource.get());
m_asyncExecType = ScriptRunner::InOrder;
contextDocument->scriptRunner()->queueScriptForExecution(this,
m_asyncExecType);
// Note that watchForLoad can immediately call notifyFinished.
m_pendingScript->watchForLoad(this);
} else if (client->hasSourceAttribute()) {
m_pendingScript = PendingScript::create(m_element, m_resource.get());
m_asyncExecType = ScriptRunner::Async;
LocalFrame* frame = m_element->document().frame();
if (frame) {
ScriptState* scriptState = ScriptState::forMainWorld(frame);
if (scriptState)
ScriptStreamer::startStreaming(
m_pendingScript.get(), ScriptStreamer::Async, frame->settings(),
scriptState, frame->frameScheduler()->loadingTaskRunner());
}
contextDocument->scriptRunner()->queueScriptForExecution(this,
m_asyncExecType);
// Note that watchForLoad can immediately call notifyFinished.
m_pendingScript->watchForLoad(this);
} else {
// Reset line numbering for nested writes.
TextPosition position = elementDocument.isInDocumentWrite()
? TextPosition()
: scriptStartPosition;
KURL scriptURL = (!elementDocument.isInDocumentWrite() && m_parserInserted)
? elementDocument.url()
: KURL();
if (!executeScript(
ScriptSourceCode(scriptContent(), scriptURL, position))) {
dispatchErrorEvent();
return false;
}
}
return true;
}
// http://dev.w3.org/html5/spec/Overview.html#prepare-a-script
bool ScriptLoader::prepareScript(const TextPosition& scriptStartPosition, LegacyTypeSupport supportLegacyTypes)
{
if (m_alreadyStarted)
return false;
ScriptLoaderClient* client = this->client();
bool wasParserInserted;
if (m_parserInserted) {
wasParserInserted = true;
m_parserInserted = false;
} else {
wasParserInserted = false;
}
if (wasParserInserted && !client->asyncAttributeValue())
m_forceAsync = true;
// FIXME: HTML5 spec says we should check that all children are either comments or empty text nodes.
if (!client->hasSourceAttribute() && !m_element->firstChild())
return false;
if (!m_element->inDocument())
return false;
if (!isScriptTypeSupported(supportLegacyTypes))
return false;
if (wasParserInserted) {
m_parserInserted = true;
m_forceAsync = false;
}
m_alreadyStarted = true;
// FIXME: If script is parser inserted, verify it's still in the original document.
Document& elementDocument = m_element->document();
Document* contextDocument = elementDocument.contextDocument().get();
if (!contextDocument || !contextDocument->allowExecutingScripts(m_element))
return false;
if (!isScriptForEventSupported())
return false;
if (!client->charsetAttributeValue().isEmpty())
m_characterEncoding = client->charsetAttributeValue();
else
m_characterEncoding = elementDocument.charset();
if (client->hasSourceAttribute()) {
if (!fetchScript(client->sourceAttributeValue()))
return false;
}
if (client->hasSourceAttribute() && client->deferAttributeValue() && m_parserInserted && !client->asyncAttributeValue()) {
m_willExecuteWhenDocumentFinishedParsing = true;
m_willBeParserExecuted = true;
} else if (client->hasSourceAttribute() && m_parserInserted && !client->asyncAttributeValue()) {
m_willBeParserExecuted = true;
} else if (!client->hasSourceAttribute() && m_parserInserted && !elementDocument.isRenderingReady()) {
m_willBeParserExecuted = true;
m_readyToBeParserExecuted = true;
} else if (client->hasSourceAttribute() && !client->asyncAttributeValue() && !m_forceAsync) {
m_willExecuteInOrder = true;
contextDocument->scriptRunner()->queueScriptForExecution(this, m_resource, ScriptRunner::IN_ORDER_EXECUTION);
m_resource->addClient(this);
} else if (client->hasSourceAttribute()) {
contextDocument->scriptRunner()->queueScriptForExecution(this, m_resource, ScriptRunner::ASYNC_EXECUTION);
m_resource->addClient(this);
} else {
// Reset line numbering for nested writes.
TextPosition position = elementDocument.isInDocumentWrite() ? TextPosition() : scriptStartPosition;
KURL scriptURL = (!elementDocument.isInDocumentWrite() && m_parserInserted) ? elementDocument.url() : KURL();
executeScript(ScriptSourceCode(scriptContent(), scriptURL, position));
}
return true;
}
