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105 lines
3.5 KiB
C++
105 lines
3.5 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <andreas@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/HashTable.h>
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#include <LibWeb/HTML/Parser/HTMLToken.h>
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namespace Web::HTML {
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String HTMLToken::to_string() const
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{
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StringBuilder builder;
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switch (type()) {
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case HTMLToken::Type::DOCTYPE:
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builder.append("DOCTYPE"sv);
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builder.append(" { name: '"sv);
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builder.append(doctype_data().name);
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builder.append("' }"sv);
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break;
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case HTMLToken::Type::StartTag:
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builder.append("StartTag"sv);
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break;
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case HTMLToken::Type::EndTag:
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builder.append("EndTag"sv);
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break;
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case HTMLToken::Type::Comment:
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builder.append("Comment"sv);
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break;
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case HTMLToken::Type::Character:
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builder.append("Character"sv);
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break;
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case HTMLToken::Type::EndOfFile:
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builder.append("EndOfFile"sv);
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break;
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case HTMLToken::Type::Invalid:
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VERIFY_NOT_REACHED();
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}
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if (type() == HTMLToken::Type::StartTag || type() == HTMLToken::Type::EndTag) {
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builder.append(" { name: '"sv);
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builder.append(tag_name());
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builder.append("', { "sv);
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for_each_attribute([&](auto& attribute) {
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builder.append(attribute.local_name);
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builder.append("=\""sv);
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builder.append(attribute.value);
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builder.append("\" "sv);
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return IterationDecision::Continue;
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});
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builder.append("} }"sv);
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}
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if (is_comment()) {
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builder.append(" { data: '"sv);
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builder.append(comment());
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builder.append("' }"sv);
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}
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if (is_character()) {
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builder.append(" { data: '"sv);
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builder.append_code_point(code_point());
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builder.append("' }"sv);
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}
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if (type() == HTMLToken::Type::Character) {
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builder.appendff("@{}:{}", m_start_position.line, m_start_position.column);
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} else {
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builder.appendff("@{}:{}-{}:{}", m_start_position.line, m_start_position.column, m_end_position.line, m_end_position.column);
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}
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return MUST(builder.to_string());
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}
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void HTMLToken::normalize_attributes()
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{
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// From AttributeNameState: https://html.spec.whatwg.org/multipage/parsing.html#attribute-name-state
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//
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// When the user agent leaves the attribute name state (and before emitting the tag token, if appropriate),
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// the complete attribute's name must be compared to the other attributes on the same token;
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// if there is already an attribute on the token with the exact same name, then this is a duplicate-attribute
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// parse error and the new attribute must be removed from the token.
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// NOTE: If an attribute is so removed from a token, it, and the value that gets associated with it, if any,
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// are never subsequently used by the parser, and are therefore effectively discarded. Removing the attribute
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// in this way does not change its status as the "current attribute" for the purposes of the tokenizer, however.
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HashTable<FlyString> seen_attributes;
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auto* ptr = tag_attributes();
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if (!ptr)
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return;
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auto& tag_attributes = *ptr;
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for (size_t i = 0; i < tag_attributes.size(); ++i) {
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auto& attribute = tag_attributes[i];
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if (seen_attributes.set(attribute.local_name, AK::HashSetExistingEntryBehavior::Keep) == AK::HashSetResult::KeptExistingEntry) {
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// This is a duplicate attribute, remove it.
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tag_attributes.remove(i);
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--i;
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}
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}
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}
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}
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