LinkRelAttribute.cpp [plain text]
#include "config.h"
#include "LinkRelAttribute.h"
#include "Document.h"
#include "LinkIconType.h"
#include "RuntimeEnabledFeatures.h"
#include "Settings.h"
#include <wtf/text/StringView.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
LinkRelAttribute::LinkRelAttribute()
: iconType()
, isStyleSheet(false)
, isAlternate(false)
, isDNSPrefetch(false)
, isLinkPreload(false)
, isLinkPreconnect(false)
, isLinkPrefetch(false)
#if ENABLE(APPLICATION_MANIFEST)
, isApplicationManifest(false)
#endif
{
}
LinkRelAttribute::LinkRelAttribute(Document& document, const String& rel)
: LinkRelAttribute()
{
if (equalLettersIgnoringASCIICase(rel, "stylesheet"))
isStyleSheet = true;
else if (equalLettersIgnoringASCIICase(rel, "icon") || equalLettersIgnoringASCIICase(rel, "shortcut icon"))
iconType = LinkIconType::Favicon;
else if (equalLettersIgnoringASCIICase(rel, "apple-touch-icon"))
iconType = LinkIconType::TouchIcon;
else if (equalLettersIgnoringASCIICase(rel, "apple-touch-icon-precomposed"))
iconType = LinkIconType::TouchPrecomposedIcon;
else if (equalLettersIgnoringASCIICase(rel, "dns-prefetch"))
isDNSPrefetch = true;
else if (document.settings().linkPreconnectEnabled() && equalLettersIgnoringASCIICase(rel, "preconnect"))
isLinkPreconnect = true;
else if (RuntimeEnabledFeatures::sharedFeatures().linkPreloadEnabled() && equalLettersIgnoringASCIICase(rel, "preload"))
isLinkPreload = true;
else if (RuntimeEnabledFeatures::sharedFeatures().linkPrefetchEnabled() && equalLettersIgnoringASCIICase(rel, "prefetch"))
isLinkPrefetch = true;
else if (equalLettersIgnoringASCIICase(rel, "alternate stylesheet") || equalLettersIgnoringASCIICase(rel, "stylesheet alternate")) {
isStyleSheet = true;
isAlternate = true;
#if ENABLE(APPLICATION_MANIFEST)
} else if (equalLettersIgnoringASCIICase(rel, "manifest")) {
isApplicationManifest = true;
#endif
} else {
String relCopy = rel;
relCopy.replace('\n', ' ');
for (auto word : StringView(relCopy).split(' ')) {
if (equalLettersIgnoringASCIICase(word, "stylesheet"))
isStyleSheet = true;
else if (equalLettersIgnoringASCIICase(word, "alternate"))
isAlternate = true;
else if (equalLettersIgnoringASCIICase(word, "icon"))
iconType = LinkIconType::Favicon;
else if (equalLettersIgnoringASCIICase(word, "apple-touch-icon"))
iconType = LinkIconType::TouchIcon;
else if (equalLettersIgnoringASCIICase(word, "apple-touch-icon-precomposed"))
iconType = LinkIconType::TouchPrecomposedIcon;
}
}
}
bool LinkRelAttribute::isSupported(Document& document, StringView attribute)
{
static const char* const supportedAttributes[] = {
"alternate", "dns-prefetch", "icon", "stylesheet", "apple-touch-icon", "apple-touch-icon-precomposed",
#if ENABLE(APPLICATION_MANIFEST)
"manifest",
#endif
};
for (auto* supportedAttribute : supportedAttributes) {
if (equalIgnoringASCIICase(attribute, supportedAttribute))
return true;
}
if (document.settings().linkPreconnectEnabled() && equalIgnoringASCIICase(attribute, "preconnect"))
return true;
if (RuntimeEnabledFeatures::sharedFeatures().linkPreloadEnabled() && equalIgnoringASCIICase(attribute, "preload"))
return true;
if (RuntimeEnabledFeatures::sharedFeatures().linkPrefetchEnabled() && equalIgnoringASCIICase(attribute, "prefetch"))
return true;
return false;
}
}