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-rw-r--r--Source/WebCore/dom/ScriptElement.cpp259
1 files changed, 129 insertions, 130 deletions
diff --git a/Source/WebCore/dom/ScriptElement.cpp b/Source/WebCore/dom/ScriptElement.cpp
index 1939a08..3bba9a0 100644
--- a/Source/WebCore/dom/ScriptElement.cpp
+++ b/Source/WebCore/dom/ScriptElement.cpp
@@ -51,13 +51,16 @@
namespace WebCore {
-ScriptElement::ScriptElement(Element* element, bool wasInsertedByParser, bool wasAlreadyStarted)
+ScriptElement::ScriptElement(Element* element, bool parserInserted, bool alreadyStarted)
: m_element(element)
, m_cachedScript(0)
- , m_wasInsertedByParser(wasInsertedByParser)
+ , m_parserInserted(parserInserted)
, m_isExternalScript(false)
- , m_wasAlreadyStarted(wasAlreadyStarted)
+ , m_alreadyStarted(alreadyStarted)
, m_haveFiredLoad(false)
+ , m_willBeParserExecuted(false)
+ , m_readyToBeParserExecuted(false)
+ , m_willExecuteWhenDocumentFinishedParsing(false)
{
ASSERT(m_element);
}
@@ -67,22 +70,10 @@ ScriptElement::~ScriptElement()
stopLoadRequest();
}
-void ScriptElement::insertedIntoDocument(const String& sourceUrl)
+void ScriptElement::insertedIntoDocument()
{
- if (wasInsertedByParser() && !isAsynchronous())
- return;
-
- // http://www.whatwg.org/specs/web-apps/current-work/#script
-
- if (!sourceUrl.isEmpty()) {
- requestScript(sourceUrl);
- return;
- }
-
- // If there's an empty script node, we shouldn't evaluate the script
- // because if a script is inserted afterwards (by setting text or innerText)
- // it should be evaluated, and evaluateScript only evaluates a script once.
- evaluateScript(ScriptSourceCode(scriptContent(), element()->document()->url())); // FIXME: Provide a real starting line number here.
+ if (!m_parserInserted)
+ prepareScript(); // FIXME: Provide a real starting line number here.
}
void ScriptElement::removedFromDocument()
@@ -93,22 +84,8 @@ void ScriptElement::removedFromDocument()
void ScriptElement::childrenChanged()
{
- if (wasInsertedByParser())
- return;
-
- // If a node is inserted as a child of the script element
- // and the script element has been inserted in the document
- // we evaluate the script.
- if (m_element->inDocument() && m_element->firstChild())
- evaluateScript(ScriptSourceCode(scriptContent(), m_element->document()->url())); // FIXME: Provide a real starting line number here
-}
-
-void ScriptElement::finishParsingChildren(const String& sourceUrl)
-{
- // The parser just reached </script>. If we have no src and no text,
- // allow dynamic loading later.
- if (sourceUrl.isEmpty() && scriptContent().isEmpty())
- m_wasInsertedByParser = false;
+ if (!m_parserInserted && m_element->inDocument())
+ prepareScript(); // FIXME: Provide a real starting line number here.
}
void ScriptElement::handleSourceAttribute(const String& sourceUrl)
@@ -116,12 +93,19 @@ void ScriptElement::handleSourceAttribute(const String& sourceUrl)
if (ignoresLoadRequest() || sourceUrl.isEmpty())
return;
- requestScript(sourceUrl);
+ prepareScript(); // FIXME: Provide a real starting line number here.
}
// Helper function
-static bool isSupportedJavaScriptLanguage(const String& language)
+static bool isLegacySupportedJavaScriptLanguage(const String& language)
{
+ // Mozilla 1.8 accepts javascript1.0 - javascript1.7, but WinIE 7 accepts only javascript1.1 - javascript1.3.
+ // Mozilla 1.8 and WinIE 7 both accept javascript and livescript.
+ // WinIE 7 accepts ecmascript and jscript, but Mozilla 1.8 doesn't.
+ // Neither Mozilla 1.8 nor WinIE 7 accept leading or trailing whitespace.
+ // We want to accept all the values that either of these browsers accept, but not other values.
+
+ // FIXME: This function is not HTML5 compliant. These belong in the MIME registry as "text/javascript<version>" entries.
typedef HashSet<String, CaseFoldingHash> LanguageSet;
DEFINE_STATIC_LOCAL(LanguageSet, languages, ());
if (languages.isEmpty()) {
@@ -137,58 +121,133 @@ static bool isSupportedJavaScriptLanguage(const String& language)
languages.add("javascript1.7");
languages.add("livescript");
languages.add("ecmascript");
- languages.add("jscript");
+ languages.add("jscript");
}
return languages.contains(language);
}
-void ScriptElement::requestScript(const String& sourceUrl)
+bool ScriptElement::isScriptTypeSupported(LegacyTypeSupport supportLegacyTypes) const
+{
+ // FIXME: isLegacySupportedJavaScriptLanguage() is not valid HTML5. It is used here to maintain backwards compatibility with existing layout tests. The specific violations are:
+ // - Allowing type=javascript. type= should only support MIME types, such as text/javascript.
+ // - Allowing a different set of languages for language= and type=. language= supports Javascript 1.1 and 1.4-1.6, but type= does not.
+
+ String type = typeAttributeValue();
+ String language = languageAttributeValue();
+ if (type.isEmpty() && language.isEmpty())
+ return true; // Assume text/javascript.
+ if (type.isEmpty()) {
+ type = "text/" + language.lower();
+ if (MIMETypeRegistry::isSupportedJavaScriptMIMEType(type) || isLegacySupportedJavaScriptLanguage(language))
+ return true;
+ } else if (MIMETypeRegistry::isSupportedJavaScriptMIMEType(type.stripWhiteSpace().lower()) || (supportLegacyTypes == AllowLegacyTypeInTypeAttribute && isLegacySupportedJavaScriptLanguage(type)))
+ return true;
+ return false;
+}
+
+// http://dev.w3.org/html5/spec/Overview.html#prepare-a-script
+bool ScriptElement::prepareScript(const TextPosition1& scriptStartPosition, LegacyTypeSupport supportLegacyTypes)
{
- // FIXME: Eventually we'd like to evaluate scripts which are inserted into a
+ if (m_alreadyStarted)
+ return false;
+
+ bool wasParserInserted;
+ if (m_parserInserted) {
+ wasParserInserted = true;
+ m_parserInserted = false;
+ } else
+ wasParserInserted = false;
+
+ // FIXME: HTML5 spec says we should set forceAsync.
+
+ // 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_alreadyStarted = true;
+
+ // FIXME: If script is parser inserted, verify it's still in the original 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 (!m_element->document()->frame())
- return;
+ return false;
+
+ if (!m_element->document()->frame()->script()->canExecuteScripts(AboutToExecuteScript))
+ return false;
+
+ if (!isScriptForEventSupported())
+ return false;
+
+ if (!charsetAttributeValue().isEmpty())
+ m_characterEncoding = charsetAttributeValue();
+ else
+ m_characterEncoding = m_element->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 && !m_element->document()->haveStylesheetsLoaded()) {
+ m_willBeParserExecuted = true;
+ m_readyToBeParserExecuted = true;
+ } else if (hasSourceAttribute())
+ m_cachedScript->addClient(this);
+ else
+ executeScript(ScriptSourceCode(scriptContent(), m_element->document()->url(), scriptStartPosition));
+
+ return true;
+}
+
+bool ScriptElement::requestScript(const String& sourceUrl)
+{
+ if (!m_element->document()->contentSecurityPolicy()->canLoadExternalScriptFromSrc(sourceUrl))
+ return false;
RefPtr<Document> originalDocument = m_element->document();
if (!m_element->dispatchBeforeLoadEvent(sourceUrl))
- return;
+ return false;
if (!m_element->inDocument() || m_element->document() != originalDocument)
- return;
+ return false;
ASSERT(!m_cachedScript);
+ // FIXME: If sourceUrl is empty, we should dispatchErrorEvent().
m_cachedScript = m_element->document()->cachedResourceLoader()->requestScript(sourceUrl, scriptCharset());
m_isExternalScript = true;
- // m_wasInsertedByParser is never reset - always resied at the initial value set while parsing.
- // m_wasAlreadyStarted is left untouched as well to avoid script reexecution, if a <script> element
- // is removed and reappended to the document.
- m_haveFiredLoad = false;
-
- if (m_cachedScript) {
- m_cachedScript->addClient(this);
- return;
- }
+ if (m_cachedScript)
+ return true;
dispatchErrorEvent();
+ return false;
}
-void ScriptElement::evaluateScript(const ScriptSourceCode& sourceCode)
+void ScriptElement::executeScript(const ScriptSourceCode& sourceCode)
{
- if (wasAlreadyStarted() || sourceCode.isEmpty() || !shouldExecuteAsJavaScript())
+ ASSERT(m_alreadyStarted);
+
+ if (sourceCode.isEmpty())
return;
RefPtr<Document> document = m_element->document();
ASSERT(document);
if (Frame* frame = document->frame()) {
- if (!frame->script()->canExecuteScripts(AboutToExecuteScript))
- return;
-
- m_wasAlreadyStarted = true;
-
- // http://www.whatwg.org/specs/web-apps/current-work/#script
-
{
IgnoreDestructiveWriteCountIncrementer ignoreDesctructiveWriteCountIncrementer(m_isExternalScript ? document.get() : 0);
// Create a script from the script element node, using the script
@@ -201,36 +260,23 @@ void ScriptElement::evaluateScript(const ScriptSourceCode& sourceCode)
}
}
-void ScriptElement::executeScript(const ScriptSourceCode& sourceCode)
-{
- if (wasAlreadyStarted() || sourceCode.isEmpty())
- return;
- RefPtr<Document> document = m_element->document();
- ASSERT(document);
- Frame* frame = document->frame();
- if (!frame)
- return;
-
- m_wasAlreadyStarted = true;
-
- frame->script()->executeScript(sourceCode);
-}
-
void ScriptElement::stopLoadRequest()
{
if (m_cachedScript) {
- m_cachedScript->removeClient(this);
+ if (!m_willBeParserExecuted)
+ m_cachedScript->removeClient(this);
m_cachedScript = 0;
}
}
void ScriptElement::execute(CachedScript* cachedScript)
{
+ ASSERT(!m_willBeParserExecuted);
ASSERT(cachedScript);
if (cachedScript->errorOccurred())
dispatchErrorEvent();
else {
- evaluateScript(ScriptSourceCode(cachedScript));
+ executeScript(ScriptSourceCode(cachedScript));
dispatchLoadEvent();
}
cachedScript->removeClient(this);
@@ -238,6 +284,7 @@ void ScriptElement::execute(CachedScript* cachedScript)
void ScriptElement::notifyFinished(CachedResource* o)
{
+ ASSERT(!m_willBeParserExecuted);
ASSERT_UNUSED(o, o == m_cachedScript);
m_element->document()->asyncScriptRunner()->executeScriptSoon(this, m_cachedScript);
m_cachedScript = 0;
@@ -245,59 +292,25 @@ void ScriptElement::notifyFinished(CachedResource* o)
bool ScriptElement::ignoresLoadRequest() const
{
- return wasAlreadyStarted() || m_isExternalScript || wasInsertedByParser() || !m_element->inDocument();
+ return m_alreadyStarted || m_isExternalScript || m_parserInserted || !m_element->inDocument();
}
-bool ScriptElement::shouldExecuteAsJavaScript() const
+bool ScriptElement::isScriptForEventSupported() const
{
- /*
- Mozilla 1.8 accepts javascript1.0 - javascript1.7, but WinIE 7 accepts only javascript1.1 - javascript1.3.
- Mozilla 1.8 and WinIE 7 both accept javascript and livescript.
- WinIE 7 accepts ecmascript and jscript, but Mozilla 1.8 doesn't.
- Neither Mozilla 1.8 nor WinIE 7 accept leading or trailing whitespace.
- We want to accept all the values that either of these browsers accept, but not other values.
-
- FIXME: Is this HTML5 compliant?
- */
- String type = typeAttributeValue();
- if (!type.isEmpty()) {
- if (!MIMETypeRegistry::isSupportedJavaScriptMIMEType(type.stripWhiteSpace().lower()))
- return false;
- } else {
- String language = languageAttributeValue();
- if (!language.isEmpty() && !isSupportedJavaScriptLanguage(language))
- return false;
- }
-
- // No type or language is specified, so we assume the script to be JavaScript.
-
- String forAttribute = forAttributeValue();
String eventAttribute = eventAttributeValue();
- if (!forAttribute.isEmpty() && !eventAttribute.isEmpty()) {
+ String forAttribute = forAttributeValue();
+ if (!eventAttribute.isEmpty() && !forAttribute.isEmpty()) {
forAttribute = forAttribute.stripWhiteSpace();
if (!equalIgnoringCase(forAttribute, "window"))
return false;
-
+
eventAttribute = eventAttribute.stripWhiteSpace();
if (!equalIgnoringCase(eventAttribute, "onload") && !equalIgnoringCase(eventAttribute, "onload()"))
return false;
}
-
return true;
}
-String ScriptElement::scriptCharset() const
-{
- // First we try to get encoding from charset attribute.
- String charset = charsetAttributeValue().stripWhiteSpace();
-
- // If charset has not been declared in script tag, fall back to frame encoding.
- if (charset.isEmpty())
- charset = m_element->document()->charset();
-
- return charset;
-}
-
String ScriptElement::scriptContent() const
{
Vector<UChar> val;
@@ -325,20 +338,6 @@ String ScriptElement::scriptContent() const
return String::adopt(val);
}
-bool ScriptElement::isAsynchronous() const
-{
- // Only external scripts may be asynchronous.
- // See: http://dev.w3.org/html5/spec/Overview.html#attr-script-async
- return !sourceAttributeValue().isEmpty() && asyncAttributeValue();
-}
-
-bool ScriptElement::isDeferred() const
-{
- // Only external scripts may be deferred and async trumps defer to allow for backward compatibility.
- // See: http://dev.w3.org/html5/spec/Overview.html#attr-script-defer
- return !sourceAttributeValue().isEmpty() && !asyncAttributeValue() && deferAttributeValue();
-}
-
ScriptElement* toScriptElement(Element* element)
{
if (element->isHTMLElement() && element->hasTagName(HTMLNames::scriptTag))
generated by cgit v1.1 at 2025-05-19 06:32:36 +0000