void HTMLLinkElement::setDisabledState(bool disabled)
{
DisabledState oldDisabledState = m_disabledState;
m_disabledState = disabled ? Disabled : EnabledViaScript;
if (oldDisabledState != m_disabledState) {
// If we change the disabled state while the sheet is still loading, then we have to
// perform three checks:
if (styleSheetIsLoading()) {
// Check #1: The sheet becomes disabled while loading.
if (m_disabledState == Disabled)
removePendingSheet();
// Check #2: An alternate sheet becomes enabled while it is still loading.
if (m_relAttribute.m_isAlternate && m_disabledState == EnabledViaScript)
addPendingSheet(Blocking);
// Check #3: A main sheet becomes enabled while it was still loading and
// after it was disabled via script. It takes really terrible code to make this
// happen (a double toggle for no reason essentially). This happens on
// virtualplastic.net, which manages to do about 12 enable/disables on only 3
// sheets. :)
if (!m_relAttribute.m_isAlternate && m_disabledState == EnabledViaScript && oldDisabledState == Disabled)
addPendingSheet(Blocking);
// If the sheet is already loading just bail.
return;
}
// Load the sheet, since it's never been loaded before.
if (!m_sheet && m_disabledState == EnabledViaScript)
process();
else
document()->styleSelectorChanged(DeferRecalcStyle); // Update the style selector.
}
}
HTMLLinkElement::~HTMLLinkElement()
{
if (m_sheet)
m_sheet->clearOwnerNode();
if (m_cachedSheet) {
m_cachedSheet->removeClient(this);
removePendingSheet();
}
if (inDocument())
document()->removeStyleSheetCandidateNode(this);
linkLoadEventSender().cancelEvent(this);
}
void HTMLLinkElement::removedFromDocument()
{
HTMLElement::removedFromDocument();
if (m_isInShadowTree) {
ASSERT(!m_sheet);
return;
}
document()->removeStyleSheetCandidateNode(this);
if (m_sheet)
clearSheet();
if (styleSheetIsLoading())
removePendingSheet();
if (document()->renderer())
document()->styleSelectorChanged(DeferRecalcStyle);
}
void HTMLLinkElement::process()
{
if (!inDocument() || m_isInShadowTree) {
ASSERT(!m_sheet);
return;
}
String type = m_type.lower();
if (!m_linkLoader.loadLink(m_relAttribute, type, m_sizes->toString(), m_url, document()))
return;
bool acceptIfTypeContainsTextCSS = document()->page() && document()->page()->settings() && document()->page()->settings()->treatsAnyTextCSSLinkAsStylesheet();
if (m_disabledState != Disabled && (m_relAttribute.m_isStyleSheet || (acceptIfTypeContainsTextCSS && type.contains("text/css")))
&& document()->frame() && m_url.isValid()) {
String charset = getAttribute(charsetAttr);
if (charset.isEmpty() && document()->frame())
charset = document()->charset();
if (m_cachedSheet) {
removePendingSheet();
m_cachedSheet->removeClient(this);
m_cachedSheet = 0;
}
if (!shouldLoadLink())
return;
m_loading = true;
bool mediaQueryMatches = true;
if (!m_media.isEmpty()) {
RefPtr<RenderStyle> documentStyle = CSSStyleSelector::styleForDocument(document());
RefPtr<MediaList> media = MediaList::createAllowingDescriptionSyntax(m_media);
MediaQueryEvaluator evaluator(document()->frame()->view()->mediaType(), document()->frame(), documentStyle.get());
mediaQueryMatches = evaluator.eval(media.get());
}
// Don't hold up render tree construction and script execution on stylesheets
// that are not needed for the rendering at the moment.
bool blocking = mediaQueryMatches && !isAlternate();
addPendingSheet(blocking ? Blocking : NonBlocking);
// Load stylesheets that are not needed for the rendering immediately with low priority.
ResourceLoadPriority priority = blocking ? ResourceLoadPriorityUnresolved : ResourceLoadPriorityVeryLow;
ResourceRequest request(document()->completeURL(m_url));
m_cachedSheet = document()->cachedResourceLoader()->requestCSSStyleSheet(request, charset, priority);
if (m_cachedSheet)
m_cachedSheet->addClient(this);
else {
// The request may have been denied if (for example) the stylesheet is local and the document is remote.
m_loading = false;
removePendingSheet();
}
} else if (m_sheet) {
// we no longer contain a stylesheet, e.g. perhaps rel or type was changed
m_sheet = 0;
document()->styleSelectorChanged(DeferRecalcStyle);
}
}
void HTMLLinkElement::process()
{
if (!inDocument() || m_isInShadowTree) {
ASSERT(!m_sheet);
return;
}
String type = m_type.lower();
// IE extension: location of small icon for locationbar / bookmarks
// We'll record this URL per document, even if we later only use it in top level frames
if (m_relAttribute.m_isIcon && m_url.isValid() && !m_url.isEmpty()) {
if (!checkBeforeLoadEvent())
return;
document()->setIconURL(m_url.string(), type);
}
#ifdef ANDROID_APPLE_TOUCH_ICON
if ((m_relAttribute.m_isTouchIcon || m_relAttribute.m_isPrecomposedTouchIcon) && m_url.isValid()
&& !m_url.isEmpty() && document()->frame())
document()->frame()->loader()->client()
->dispatchDidReceiveTouchIconURL(m_url.string(),
m_relAttribute.m_isPrecomposedTouchIcon);
#endif
if (m_relAttribute.m_isDNSPrefetch) {
Settings* settings = document()->settings();
// FIXME: The href attribute of the link element can be in "//hostname" form, and we shouldn't attempt
// to complete that as URL <https://bugs.webkit.org/show_bug.cgi?id=48857>.
if (settings && settings->dnsPrefetchingEnabled() && m_url.isValid() && !m_url.isEmpty())
ResourceHandle::prepareForURL(m_url);
}
#if ENABLE(LINK_PREFETCH)
if ((m_relAttribute.m_isLinkPrefetch || m_relAttribute.m_isLinkPrerender || m_relAttribute.m_isLinkSubresource) && m_url.isValid() && document()->frame()) {
if (!checkBeforeLoadEvent())
return;
ResourceLoadPriority priority = ResourceLoadPriorityUnresolved;
CachedResource::Type type = CachedResource::LinkPrefetch;
// We only make one request to the cachedresourcelodaer if multiple rel types are
// specified.
if (m_relAttribute.m_isLinkSubresource) {
priority = ResourceLoadPriorityLow;
type = CachedResource::LinkSubresource;
} else if (m_relAttribute.m_isLinkPrerender)
type = CachedResource::LinkPrerender;
ResourceRequest linkRequest(document()->completeURL(m_url));
m_cachedLinkResource = document()->cachedResourceLoader()->requestLinkResource(type, linkRequest, priority);
if (m_cachedLinkResource)
m_cachedLinkResource->addClient(this);
}
#endif
bool acceptIfTypeContainsTextCSS = document()->page() && document()->page()->settings() && document()->page()->settings()->treatsAnyTextCSSLinkAsStylesheet();
if (m_disabledState != Disabled && (m_relAttribute.m_isStyleSheet || (acceptIfTypeContainsTextCSS && type.contains("text/css")))
&& document()->frame() && m_url.isValid()) {
String charset = getAttribute(charsetAttr);
if (charset.isEmpty() && document()->frame())
charset = document()->charset();
if (m_cachedSheet) {
removePendingSheet();
m_cachedSheet->removeClient(this);
m_cachedSheet = 0;
}
if (!checkBeforeLoadEvent())
return;
m_loading = true;
bool mediaQueryMatches = true;
if (!m_media.isEmpty()) {
RefPtr<RenderStyle> documentStyle = CSSStyleSelector::styleForDocument(document());
RefPtr<MediaList> media = MediaList::createAllowingDescriptionSyntax(m_media);
MediaQueryEvaluator evaluator(document()->frame()->view()->mediaType(), document()->frame(), documentStyle.get());
mediaQueryMatches = evaluator.eval(media.get());
}
// Don't hold up render tree construction and script execution on stylesheets
// that are not needed for the rendering at the moment.
bool blocking = mediaQueryMatches && !isAlternate();
addPendingSheet(blocking ? Blocking : NonBlocking);
// Load stylesheets that are not needed for the rendering immediately with low priority.
ResourceLoadPriority priority = blocking ? ResourceLoadPriorityUnresolved : ResourceLoadPriorityVeryLow;
ResourceRequest request(document()->completeURL(m_url));
m_cachedSheet = document()->cachedResourceLoader()->requestCSSStyleSheet(request, charset, priority);
if (m_cachedSheet)
m_cachedSheet->addClient(this);
else {
// The request may have been denied if (for example) the stylesheet is local and the document is remote.
m_loading = false;
removePendingSheet();
}
} else if (m_sheet) {
// we no longer contain a stylesheet, e.g. perhaps rel or type was changed
m_sheet = 0;
document()->styleSelectorChanged(DeferRecalcStyle);
}
}
