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LibWeb: Add convert string into scalar value from Infra spec

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Kenneth Myhra 2023-02-03 21:49:54 +01:00 • committed by Linus Groh
parent 2ad9c1fd6c
commit b74d5a423d
2 changed files with 17 additions and 0 deletions
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15
Userland/Libraries/LibWeb/Infra/Strings.cpp
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@ -1,6 +1,7 @@
/* /*
* Copyright (c) 2022, Linus Groh <linusg@serenityos.org> * Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
* Copyright (c) 2022, networkException <networkexception@serenityos.org> * Copyright (c) 2022, networkException <networkexception@serenityos.org>
* Copyright (c) 2023, Kenneth Myhra <kennethmyhra@serenityos.org>
* *
* SPDX-License-Identifier: BSD-2-Clause * SPDX-License-Identifier: BSD-2-Clause
*/ */
@ -65,4 +66,18 @@ bool is_code_unit_prefix(StringView potential_prefix, StringView input)
} }
} }
// https://infra.spec.whatwg.org/#scalar-value-string
ErrorOr<String> convert_to_scalar_value_string(StringView string)
{
// To convert a string into a scalar value string, replace any surrogates with U+FFFD.
StringBuilder scalar_value_builder;
auto utf8_view = Utf8View { string };
for (u32 code_point : utf8_view) {
if (is_unicode_surrogate(code_point))
code_point = 0xFFFD;
TRY(scalar_value_builder.try_append(code_point));
}
return scalar_value_builder.to_string();
}
} }

2
Userland/Libraries/LibWeb/Infra/Strings.h
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@ -1,6 +1,7 @@
/* /*
* Copyright (c) 2022, Linus Groh <linusg@serenityos.org> * Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
* Copyright (c) 2022, networkException <networkexception@serenityos.org> * Copyright (c) 2022, networkException <networkexception@serenityos.org>
* Copyright (c) 2023, Kenneth Myhra <kennethmyhra@serenityos.org>
* *
* SPDX-License-Identifier: BSD-2-Clause * SPDX-License-Identifier: BSD-2-Clause
*/ */
@ -13,5 +14,6 @@ namespace Web::Infra {
DeprecatedString strip_and_collapse_whitespace(StringView string); DeprecatedString strip_and_collapse_whitespace(StringView string);
bool is_code_unit_prefix(StringView potential_prefix, StringView input); bool is_code_unit_prefix(StringView potential_prefix, StringView input);
ErrorOr<String> convert_to_scalar_value_string(StringView string);
} }