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LibWeb: Validate the qualified name in createDocumentType()

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1% progression on ACID3. :^)
This commit is contained in:
Andreas Kling 2022-02-26 17:26:37 +01:00
parent f855cbac92
commit 262488ea33
4 changed files with 61 additions and 3 deletions
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50
Userland/Libraries/LibWeb/DOM/Document.cpp
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@ -1390,4 +1390,54 @@ bool Document::is_valid_name(String const& name)
return true;
}
// https://dom.spec.whatwg.org/#validate
ExceptionOr<Document::PrefixAndTagName> Document::validate_qualified_name(String const& qualified_name)
{
if (qualified_name.is_empty())
return InvalidCharacterError::create("Empty string is not a valid qualified name.");
Utf8View utf8view { qualified_name };
if (!utf8view.validate())
return InvalidCharacterError::create("Invalid qualified name.");
Optional<size_t> colon_offset;
bool in_name = false;
for (auto it = utf8view.begin(); it != utf8view.end(); ++it) {
auto code_point = *it;
if (code_point == ':') {
if (colon_offset.has_value())
return InvalidCharacterError::create("More than one colon (:) in qualified name.");
colon_offset = utf8view.byte_offset_of(it);
continue;
}
if (in_name) {
if (!is_valid_name_start_character(code_point))
return InvalidCharacterError::create("Invalid start of qualified name.");
in_name = false;
continue;
}
if (!is_valid_name_character(code_point))
return InvalidCharacterError::create("Invalid character in qualified name.");
}
if (!colon_offset.has_value())
return Document::PrefixAndTagName {
.prefix = {},
.tag_name = qualified_name,
};
if (*colon_offset == 0)
return InvalidCharacterError::create("Qualified name can't start with colon (:).");
if (*colon_offset >= (qualified_name.length() - 1))
return InvalidCharacterError::create("Qualified name can't end with colon (:).");
return Document::PrefixAndTagName {
.prefix = qualified_name.substring_view(0, *colon_offset),
.tag_name = qualified_name.substring_view(*colon_offset + 1),
};
}
}