chromium/third_party/blink/public/platform/web_string.h

/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 */

#ifndef THIRD_PARTY_BLINK_PUBLIC_PLATFORM_WEB_STRING_H_
#define THIRD_PARTY_BLINK_PUBLIC_PLATFORM_WEB_STRING_H_

#include <cstring>
#include <limits>
#include <optional>
#include <string>
#include <string_view>

#include "base/memory/scoped_refptr.h"
#include "base/strings/latin1_string_conversions.h"
#include "third_party/blink/public/platform/web_common.h"

#if INSIDE_BLINK
#include "third_party/blink/renderer/platform/wtf/forward.h"  // nogncheck
#endif

namespace WTF {
#if INSIDE_BLINK
class String;
#endif
class StringImpl;
}

namespace blink {

// Use either one of static methods to convert ASCII, Latin1, UTF-8 or
// UTF-16 string into WebString:
//
// * WebString::FromASCII(std::string_view ascii)
// * WebString::FromLatin1(std::string_view latin1)
// * WebString::FromUTF8(std::string_view utf8)
// * WebString::FromUTF16(std::optional<std::u16string_view> utf16)
//
// Similarly, use either of following methods to convert WebString to
// ASCII, Latin1, UTF-8 or UTF-16:
//
// * webstring.Ascii()
// * webstring.Latin1()
// * webstring.Utf8()
// * webstring.Utf16()
// * WebString::ToOptionalString16(webstring)
//
// Note that if you need to convert the UTF8 string converted from WebString
// back to WebString with FromUTF8() you may want to specify Strict
// UTF8ConversionMode when you call Utf8(), as FromUTF8 rejects strings
// with invalid UTF8 characters.
//
// Some types like GURL and base::FilePath can directly take either utf-8 or
// utf-16 strings. Use following methods to convert WebString to/from GURL or
// FilePath rather than going through intermediate string types:
//
// * GURL WebStringToGURL(const WebString&)
// * base::FilePath WebStringToFilePath(const WebString&)
// * WebString FilePathToWebString(const base::FilePath&);
//
// It is inexpensive to copy a WebString object.
//
class BLINK_PLATFORM_EXPORT WebString { … };

inline bool operator==(const WebString& a, const char* b) { … }

inline bool operator!=(const WebString& a, const char* b) { … }

inline bool operator==(const char* a, const WebString& b) { … }

inline bool operator!=(const char* a, const WebString& b) { … }

inline bool operator==(const WebString& a, const WebString& b) { … }

inline bool operator!=(const WebString& a, const WebString& b) { … }

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_PUBLIC_PLATFORM_WEB_STRING_H_