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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. 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.
*
* 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 HOLDER 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, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/FlyString.h>
#include <AK/String.h>
#include <AK/StringBuilder.h>
#include <AK/Types.h>
#include <AK/Utf8View.h>
#include <AK/Vector.h>
namespace Web {
class HTMLToken {
friend class HTMLDocumentParser;
friend class HTMLTokenizer;
public:
enum class Type {
Invalid,
DOCTYPE,
StartTag,
EndTag,
Comment,
Character,
EndOfFile,
};
static HTMLToken make_character(u32 codepoint)
{
HTMLToken token;
token.m_type = Type::Character;
token.m_comment_or_character.data.append(codepoint);
return token;
}
bool is_doctype() const { return m_type == Type::DOCTYPE; }
bool is_start_tag() const { return m_type == Type::StartTag; }
bool is_end_tag() const { return m_type == Type::EndTag; }
bool is_comment() const { return m_type == Type::Comment; }
bool is_character() const { return m_type == Type::Character; }
bool is_end_of_file() const { return m_type == Type::EndOfFile; }
u32 codepoint() const
{
ASSERT(is_character());
Utf8View view(m_comment_or_character.data.string_view());
ASSERT(view.length_in_codepoints() == 1);
return *view.begin();
}
bool is_parser_whitespace() const
{
// NOTE: The parser considers '\r' to be whitespace, while the tokenizer does not.
if (!is_character())
return false;
switch (codepoint()) {
case '\t':
case '\n':
case '\f':
case '\r':
case ' ':
return true;
default:
return false;
}
}
String tag_name() const
{
ASSERT(is_start_tag() || is_end_tag());
return m_tag.tag_name.to_string();
}
bool is_self_closing() const
{
ASSERT(is_start_tag() || is_end_tag());
return m_tag.self_closing;
}
bool has_acknowledged_self_closing_flag() const
{
ASSERT(is_self_closing());
return m_tag.self_closing_acknowledged;
}
void acknowledge_self_closing_flag_if_set()
{
if (is_self_closing())
m_tag.self_closing_acknowledged = true;
}
StringView attribute(const FlyString& attribute_name)
{
ASSERT(is_start_tag() || is_end_tag());
for (auto& attribute : m_tag.attributes) {
if (attribute_name == attribute.name_builder.string_view())
return attribute.value_builder.string_view();
}
return {};
}
void drop_attributes()
{
ASSERT(is_start_tag() || is_end_tag());
m_tag.attributes.clear();
}
Type type() const { return m_type; }
String to_string() const;
private:
struct AttributeBuilder {
StringBuilder name_builder;
StringBuilder value_builder;
};
Type m_type { Type::Invalid };
// Type::DOCTYPE
struct {
StringBuilder name;
StringBuilder public_identifier;
StringBuilder system_identifier;
bool force_quirks { false };
} m_doctype;
// Type::StartTag
// Type::EndTag
struct {
StringBuilder tag_name;
bool self_closing { false };
bool self_closing_acknowledged { false };
Vector<AttributeBuilder> attributes;
} m_tag;
// Type::Comment
// Type::Character
struct {
StringBuilder data;
} m_comment_or_character;
};
}
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