132 lines
5.3 KiB
C++
132 lines
5.3 KiB
C++
/*
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* Copyright (C) 2011 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "config.h"
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#include "LinkRelAttribute.h"
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#include "Document.h"
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#include "LinkIconType.h"
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#include "RuntimeEnabledFeatures.h"
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#include "Settings.h"
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#include <wtf/text/StringView.h>
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#include <wtf/text/WTFString.h>
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namespace WebCore {
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LinkRelAttribute::LinkRelAttribute()
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: iconType()
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, isStyleSheet(false)
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, isAlternate(false)
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, isDNSPrefetch(false)
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, isLinkPreload(false)
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, isLinkPreconnect(false)
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, isLinkPrefetch(false)
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#if ENABLE(APPLICATION_MANIFEST)
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, isApplicationManifest(false)
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#endif
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{
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}
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// Keep LinkRelAttribute::isSupported() in sync when updating this constructor.
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LinkRelAttribute::LinkRelAttribute(Document& document, const String& rel)
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: LinkRelAttribute()
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{
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if (equalLettersIgnoringASCIICase(rel, "stylesheet"))
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isStyleSheet = true;
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else if (equalLettersIgnoringASCIICase(rel, "icon") || equalLettersIgnoringASCIICase(rel, "shortcut icon"))
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iconType = LinkIconType::Favicon;
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else if (equalLettersIgnoringASCIICase(rel, "apple-touch-icon"))
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iconType = LinkIconType::TouchIcon;
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else if (equalLettersIgnoringASCIICase(rel, "apple-touch-icon-precomposed"))
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iconType = LinkIconType::TouchPrecomposedIcon;
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else if (equalLettersIgnoringASCIICase(rel, "dns-prefetch"))
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isDNSPrefetch = true;
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else if (document.settings().linkPreconnectEnabled() && equalLettersIgnoringASCIICase(rel, "preconnect"))
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isLinkPreconnect = true;
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else if (document.settings().linkPreloadEnabled() && equalLettersIgnoringASCIICase(rel, "preload"))
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isLinkPreload = true;
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else if (document.settings().linkPrefetchEnabled() && equalLettersIgnoringASCIICase(rel, "prefetch"))
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isLinkPrefetch = true;
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else if (equalLettersIgnoringASCIICase(rel, "alternate stylesheet") || equalLettersIgnoringASCIICase(rel, "stylesheet alternate")) {
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isStyleSheet = true;
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isAlternate = true;
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#if ENABLE(APPLICATION_MANIFEST)
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} else if (equalLettersIgnoringASCIICase(rel, "manifest")) {
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isApplicationManifest = true;
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#endif
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} else {
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// Tokenize the rel attribute and set bits based on specific keywords that we find.
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String relCopy = rel;
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relCopy.replace('\n', ' ');
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for (auto word : StringView(relCopy).split(' ')) {
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if (equalLettersIgnoringASCIICase(word, "stylesheet"))
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isStyleSheet = true;
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else if (equalLettersIgnoringASCIICase(word, "alternate"))
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isAlternate = true;
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else if (equalLettersIgnoringASCIICase(word, "icon"))
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iconType = LinkIconType::Favicon;
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else if (equalLettersIgnoringASCIICase(word, "apple-touch-icon"))
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iconType = LinkIconType::TouchIcon;
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else if (equalLettersIgnoringASCIICase(word, "apple-touch-icon-precomposed"))
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iconType = LinkIconType::TouchPrecomposedIcon;
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}
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}
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}
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// https://html.spec.whatwg.org/#linkTypes
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bool LinkRelAttribute::isSupported(Document& document, StringView attribute)
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{
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static const char* const supportedAttributes[] = {
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"alternate", "dns-prefetch", "icon", "stylesheet", "apple-touch-icon", "apple-touch-icon-precomposed",
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#if ENABLE(APPLICATION_MANIFEST)
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"manifest",
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#endif
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};
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for (auto* supportedAttribute : supportedAttributes) {
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if (equalIgnoringASCIICase(attribute, supportedAttribute))
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return true;
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}
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if (document.settings().linkPreconnectEnabled() && equalIgnoringASCIICase(attribute, "preconnect"))
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return true;
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if (document.settings().linkPreloadEnabled() && equalIgnoringASCIICase(attribute, "preload"))
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return true;
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if (document.settings().linkPrefetchEnabled() && equalIgnoringASCIICase(attribute, "prefetch"))
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return true;
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return false;
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}
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}
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