third_party/WebKit/Source/core/html/LinkRelAttribute.cpp

   1 /*
   2  * Copyright (C) 2011 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  */
  31
  32 #include "config.h"
  33 #include "core/html/LinkRelAttribute.h"
  34
  35 #include "platform/RuntimeEnabledFeatures.h"
  36
  37 namespace blink {
  38
  39 LinkRelAttribute::LinkRelAttribute(const String& rel)
  40     : m_iconType(InvalidIcon)
  41     , m_isStyleSheet(false)
  42     , m_isAlternate(false)
  43     , m_isDNSPrefetch(false)
  44     , m_isPreconnect(false)
  45     , m_isLinkPrefetch(false)
  46     , m_isLinkSubresource(false)
  47     , m_isLinkPreload(false)
  48     , m_isLinkPrerender(false)
  49     , m_isLinkNext(false)
  50     , m_isImport(false)
  51     , m_isManifest(false)
  52 {
  53     if (rel.isEmpty())
  54         return;
  55     String relCopy = rel;
  56     relCopy.replace('\n', ' ');
  57     Vector<String> list;
  58     relCopy.split(' ', list);
  59     for (const String& linkType : list) {
  60         if (equalIgnoringCase(linkType, "stylesheet")) {
  61             if (!m_isImport)
  62                 m_isStyleSheet = true;
  63         } else if (equalIgnoringCase(linkType, "import")) {
  64             if (!m_isStyleSheet)
  65                 m_isImport = true;
  66         } else if (equalIgnoringCase(linkType, "alternate")) {
  67             m_isAlternate = true;
  68         } else if (equalIgnoringCase(linkType, "icon")) {
  69             // This also allows "shortcut icon" since we just ignore the non-standard "shortcut" token.
  70             // FIXME: This doesn't really follow the spec that requires "shortcut icon" to be the
  71             // entire string http://www.whatwg.org/specs/web-apps/current-work/multipage/links.html#rel-icon
  72             m_iconType = Favicon;
  73         } else if (equalIgnoringCase(linkType, "prefetch")) {
  74             m_isLinkPrefetch = true;
  75         } else if (equalIgnoringCase(linkType, "dns-prefetch")) {
  76             m_isDNSPrefetch = true;
  77         } else if (equalIgnoringCase(linkType, "preconnect")) {
  78             if (RuntimeEnabledFeatures::linkPreconnectEnabled())
  79                 m_isPreconnect = true;
  80         } else if (equalIgnoringCase(linkType, "subresource")) {
  81             m_isLinkSubresource = true;
  82         } else if (equalIgnoringCase(linkType, "preload")) {
  83             if (RuntimeEnabledFeatures::linkPreloadEnabled())
  84                 m_isLinkPreload = true;
  85         } else if (equalIgnoringCase(linkType, "prerender")) {
  86             m_isLinkPrerender = true;
  87         } else if (equalIgnoringCase(linkType, "next")) {
  88             m_isLinkNext = true;
  89         } else if (equalIgnoringCase(linkType, "apple-touch-icon")) {
  90             if (RuntimeEnabledFeatures::touchIconLoadingEnabled())
  91                 m_iconType = TouchIcon;
  92         } else if (equalIgnoringCase(linkType, "apple-touch-icon-precomposed")) {
  93             if (RuntimeEnabledFeatures::touchIconLoadingEnabled())
  94                 m_iconType = TouchPrecomposedIcon;
  95         } else if (equalIgnoringCase(linkType, "manifest")) {
  96             m_isManifest = true;
  97         }
  98     }
  99 }
 100
 101 }