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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Max Wipfli <max.wipfli@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/FlyString.h>
#include <AK/String.h>
#include <AK/Types.h>
#include <AK/Utf8View.h>
#include <AK/Vector.h>
namespace Web::HTML {
class HTMLToken {
friend class HTMLDocumentParser;
friend class HTMLTokenizer;
public:
enum class Type {
Invalid,
DOCTYPE,
StartTag,
EndTag,
Comment,
Character,
EndOfFile,
};
struct Position {
size_t line { 0 };
size_t column { 0 };
};
struct Attribute {
String prefix;
String local_name;
String namespace_;
String value;
Position name_start_position;
Position value_start_position;
Position name_end_position;
Position value_end_position;
};
static HTMLToken make_character(u32 code_point)
{
HTMLToken token;
token.m_type = Type::Character;
token.set_code_point(code_point);
return token;
}
static HTMLToken make_start_tag(FlyString const& tag_name)
{
HTMLToken token;
token.m_type = Type::StartTag;
token.m_tag.tag_name = tag_name;
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 code_point() const
{
VERIFY(is_character());
Utf8View view(m_comment_or_character.data);
VERIFY(view.length() == 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 (code_point()) {
case '\t':
case '\n':
case '\f':
case '\r':
case ' ':
return true;
default:
return false;
}
}
void set_code_point(u32 code_point)
{
VERIFY(is_character());
StringBuilder builder;
builder.append_code_point(code_point);
m_comment_or_character.data = builder.to_string();
}
String const& comment() const
{
VERIFY(is_comment());
return m_comment_or_character.data;
}
void set_comment(String comment)
{
VERIFY(is_comment());
m_comment_or_character.data = move(comment);
}
String tag_name() const
{
VERIFY(is_start_tag() || is_end_tag());
return m_tag.tag_name;
}
bool is_self_closing() const
{
VERIFY(is_start_tag() || is_end_tag());
return m_tag.self_closing;
}
bool has_acknowledged_self_closing_flag() const
{
VERIFY(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(FlyString const& attribute_name)
{
VERIFY(is_start_tag() || is_end_tag());
for (auto& attribute : m_tag.attributes) {
if (attribute_name == attribute.local_name)
return attribute.value;
}
return {};
}
bool has_attribute(FlyString const& attribute_name)
{
return !attribute(attribute_name).is_null();
}
void adjust_tag_name(FlyString const& old_name, FlyString const& new_name)
{
VERIFY(is_start_tag() || is_end_tag());
if (old_name == m_tag.tag_name)
m_tag.tag_name = new_name;
}
void adjust_attribute_name(FlyString const& old_name, FlyString const& new_name)
{
VERIFY(is_start_tag() || is_end_tag());
for (auto& attribute : m_tag.attributes) {
if (old_name == attribute.local_name) {
attribute.local_name = new_name;
}
}
}
void adjust_foreign_attribute(FlyString const& old_name, FlyString const& prefix, FlyString const& local_name, FlyString const& namespace_)
{
VERIFY(is_start_tag() || is_end_tag());
for (auto& attribute : m_tag.attributes) {
if (old_name == attribute.local_name) {
attribute.prefix = prefix;
attribute.local_name = local_name;
attribute.namespace_ = namespace_;
}
}
}
void drop_attributes()
{
VERIFY(is_start_tag() || is_end_tag());
m_tag.attributes.clear();
}
Type type() const { return m_type; }
String to_string() const;
Position const& start_position() const { return m_start_position; }
Position const& end_position() const { return m_end_position; }
Vector<Attribute> const& attributes() const
{
VERIFY(is_start_tag() || is_end_tag());
return m_tag.attributes;
}
private:
Type m_type { Type::Invalid };
// Type::DOCTYPE
struct {
// NOTE: "Missing" is a distinct state from the empty string.
String name;
bool missing_name { true };
String public_identifier;
bool missing_public_identifier { true };
String system_identifier;
bool missing_system_identifier { true };
bool force_quirks { false };
} m_doctype;
// Type::StartTag
// Type::EndTag
struct {
String tag_name;
bool self_closing { false };
bool self_closing_acknowledged { false };
Vector<Attribute> attributes;
} m_tag;
// Type::Comment
// Type::Character
struct {
String data;
} m_comment_or_character;
Position m_start_position;
Position m_end_position;
};
}
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