third_party/WebKit/Source/platform/LinkHash.cpp

   1 /*
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   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
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   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
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  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.
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  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "config.h"
  32 #include "platform/LinkHash.h"
  33
  34 #include "platform/weborigin/KURL.h"
  35 #include "public/platform/Platform.h"
  36 #include "wtf/text/StringUTF8Adaptor.h"
  37 #include <url/url_util.h>
  38
  39 namespace blink {
  40
  41 static bool resolveRelative(const KURL& base, const String& relative, url::RawCanonOutput<2048>* buffer)
  42 {
  43     // We use these low-level GURL functions to avoid converting back and forth from UTF-8 unnecessarily.
  44     url::Parsed parsed;
  45     StringUTF8Adaptor baseUTF8(base.string());
  46     if (relative.is8Bit()) {
  47         StringUTF8Adaptor relativeUTF8(relative);
  48         return url::ResolveRelative(baseUTF8.data(), baseUTF8.length(), base.parsed(), relativeUTF8.data(), relativeUTF8.length(), 0, buffer, &parsed);
  49     }
  50     return url::ResolveRelative(baseUTF8.data(), baseUTF8.length(), base.parsed(), relative.characters16(), relative.length(), 0, buffer, &parsed);
  51 }
  52
  53 LinkHash visitedLinkHash(const KURL& base, const AtomicString& relative)
  54 {
  55     if (relative.isNull())
  56         return 0;
  57     url::RawCanonOutput<2048> buffer;
  58     if (!resolveRelative(base, relative.string(), &buffer))
  59         return 0;
  60     return Platform::current()->visitedLinkHash(buffer.data(), buffer.length());
  61 }
  62
  63 } // namespace blink