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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_FallbackEncoding_h_
#define mozilla_dom_FallbackEncoding_h_
#include "nsString.h"
namespace mozilla {
namespace dom {
class FallbackEncoding
{
public:
/**
* Whether FromTopLevelDomain() should be used.
*/
static bool sGuessFallbackFromTopLevelDomain;
/**
* Gets the locale-dependent fallback encoding for legacy HTML and plain
* text content.
*
* @param aFallback the outparam for the fallback encoding
*/
static void FromLocale(nsACString& aFallback);
/**
* Checks if it is appropriate to call FromTopLevelDomain() for a given TLD.
*
* @param aTLD the top-level domain (in Punycode)
* @return true if OK to call FromTopLevelDomain()
*/
static bool IsParticipatingTopLevelDomain(const nsACString& aTLD);
/**
* Gets a top-level domain-depedendent fallback encoding for legacy HTML
* and plain text content
*
* @param aTLD the top-level domain (in Punycode)
* @param aFallback the outparam for the fallback encoding
*/
static void FromTopLevelDomain(const nsACString& aTLD, nsACString& aFallback);
// public API ends here!
/**
* Allocate sInstance used by FromLocale().
* To be called from nsLayoutStatics only.
*/
static void Initialize();
/**
* Delete sInstance used by FromLocale().
* To be called from nsLayoutStatics only.
*/
static void Shutdown();
private:
/**
* The fallback cache.
*/
static FallbackEncoding* sInstance;
FallbackEncoding();
~FallbackEncoding();
/**
* Invalidates the cache.
*/
void Invalidate()
{
mFallback.Truncate();
}
static void PrefChanged(const char*, void*);
/**
* Gets the fallback encoding label.
* @param aFallback the fallback encoding
*/
void Get(nsACString& aFallback);
nsCString mFallback;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_FallbackEncoding_h_
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