Do not reparse the same URL repeatedly for HTMLImageElement src attri… · WebKit/...

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…bute setter

https://bugs.webkit.org/show_bug.cgi?id=269975
rdar://123492927

Reviewed by Ryosuke Niwa.

This patch cleans up a lot of HTMLImageElement src attribute setter path.

1. HTMLImageElement should not make m_currentSrc AtomString eagerly. This is rarely accessed. So we should defer it.
2. HTMLImageElement should have super fast path for no `sizes` attribute case since this is common. We should not invoke SizesAttributeParser.
3. ImageCandidate should carry underlying AtomString if possible. Attributes are AtomString. So by carrying it,
   we can avoid AtomString creation for `m_bestFitImageURL = candidate.string.toAtomString()`.
4. We should use HTMLImageElement::currentURL if possible in ImageLoader, avoiding repeated parsing of the same URL string.
5. FrameLoader should keep m_outgoingReferrerURL. Then subsequent code can use this URL instead of parsing it repeatedly.
   We enhance URL::strippedForUseAsReferrer to further avoid reparsing URL from stripped string.

* Source/WTF/wtf/URL.cpp:
(WTF::URL::strippedForUseAsReferrer const):
(WTF::URL::strippedForUseAsReferrerWithExplicitPort const):
* Source/WTF/wtf/URL.h:
* Source/WTF/wtf/text/StringView.h:
(WTF::StringViewWithUnderlyingString::toAtomString const):
* Source/WebCore/Modules/fetch/FetchLoader.cpp:
(WebCore::FetchLoader::start):
* Source/WebCore/Modules/reporting/ReportingScope.cpp:
(WebCore::ReportingScope::generateTestReport):
* Source/WebCore/html/HTMLImageElement.cpp:
(WebCore::HTMLImageElement::currentSrc):
(WebCore::HTMLImageElement::setBestFitURLAndDPRFromImageCandidate):
(WebCore::HTMLImageElement::selectImageSource):
* Source/WebCore/html/HTMLImageElement.h:
(WebCore::HTMLImageElement::currentSrc const): Deleted.
* Source/WebCore/html/HTMLMediaElement.cpp:
(WebCore::HTMLMediaElement::mediaPlayerReferrer const):
* Source/WebCore/html/parser/HTMLPreloadScanner.cpp:
(WebCore::TokenPreloadScanner::StartTagScanner::processAttributes):
* Source/WebCore/html/parser/HTMLSrcsetParser.cpp:
(WebCore::parseImageCandidatesFromSrcsetAttribute):
(WebCore::pickBestImageCandidate):
(WebCore::bestFitSourceForImageAttributes):
* Source/WebCore/html/parser/HTMLSrcsetParser.h:
(WebCore::ImageCandidate::ImageCandidate):
(WebCore::ImageCandidate::isEmpty const):
* Source/WebCore/loader/CrossOriginAccessControl.cpp:
(WebCore::updateRequestReferrer):
* Source/WebCore/loader/CrossOriginAccessControl.h:
* Source/WebCore/loader/CrossOriginPreflightChecker.cpp:
(WebCore::CrossOriginPreflightChecker::doPreflight):
* Source/WebCore/loader/FrameLoader.cpp:
(WebCore::FrameLoader::setOutgoingReferrer):
(WebCore::FrameLoader::outgoingReferrerURL):
(WebCore::FrameLoader::loadFrameRequest):
(WebCore::FrameLoader::loadResourceSynchronously):
(WebCore::createWindow):
* Source/WebCore/loader/FrameLoader.h:
* Source/WebCore/loader/ImageLoader.cpp:
(WebCore::ImageLoader::updateFromElement):
* Source/WebCore/loader/LinkLoader.cpp:
(WebCore::LinkLoader::preloadIfNeeded):
* Source/WebCore/loader/PingLoader.cpp:
(WebCore::PingLoader::loadImage):
(WebCore::PingLoader::sendViolationReport):
* Source/WebCore/loader/SubframeLoader.cpp:
(WebCore::FrameLoader::SubframeLoader::loadOrRedirectSubframe):
(WebCore::FrameLoader::SubframeLoader::loadSubframe):
* Source/WebCore/loader/SubframeLoader.h:
* Source/WebCore/loader/SubresourceLoader.cpp:
(WebCore::SubresourceLoader::checkRedirectionCrossOriginAccessControl):
* Source/WebCore/loader/WorkerThreadableLoader.cpp:
(WebCore::WorkerThreadableLoader::WorkerThreadableLoader):
* Source/WebCore/loader/cache/CachedResourceRequest.cpp:
(WebCore::CachedResourceRequest::updateReferrerAndOriginHeaders):
* Source/WebCore/page/LocalDOMWindow.cpp:
(WebCore::LocalDOMWindow::setLocation):
(WebCore::LocalDOMWindow::createWindow):
* Source/WebCore/page/SecurityPolicy.cpp:
(WebCore::SecurityPolicy::shouldHideReferrer):
(WebCore::SecurityPolicy::referrerToOriginString):
(WebCore::SecurityPolicy::generateReferrerHeader):
* Source/WebCore/page/SecurityPolicy.h:
* Source/WebCore/page/csp/ContentSecurityPolicy.cpp:
(WebCore::ContentSecurityPolicy::createURLForReporting const):
(WebCore::ContentSecurityPolicy::reportViolation const):
* Source/WebCore/platform/network/ResourceRequestBase.cpp:
(WebCore::ResourceRequestBase::setExistingHTTPReferrerToOriginString):
* Source/WebKit/WebProcess/Plugins/PluginView.cpp:
(WebKit::PluginView::loadMainResource):

Canonical link: https://commits.webkit.org/275281@main