mirror of
https://github.com/RGBCube/serenity
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a8f5b6aaa3
This commit is the start of LibPDF, and introduces some basic structure objects. This emulates LibJS's Value structure, where Value is a simple class that can contain a pointer to a more complex Object class with more data. All of the basic PDF objects have a representation.
134 lines
2.7 KiB
C++
134 lines
2.7 KiB
C++
/*
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* Copyright (c) 2021, Matthew Olsson <mattco@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Format.h>
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namespace PDF {
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class Object;
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class Value {
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public:
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Value()
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: m_type(Type::Null)
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{
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}
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Value(bool b)
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: m_type(Type::Bool)
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{
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m_as_bool = b;
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}
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Value(int i)
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: m_type(Type::Int)
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{
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m_as_int = i;
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}
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Value(float f)
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: m_type(Type::Float)
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{
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m_as_float = f;
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}
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template<IsObject T>
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Value(NonnullRefPtr<T> obj)
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: m_type(Type::Object)
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{
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obj->ref();
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m_as_object = obj;
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}
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Value(const Value& other)
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{
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*this = other;
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}
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~Value();
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Value& operator=(const Value& other);
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[[nodiscard]] ALWAYS_INLINE bool is_null() const { return m_type == Type::Null; }
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[[nodiscard]] ALWAYS_INLINE bool is_bool() const { return m_type == Type::Bool; }
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[[nodiscard]] ALWAYS_INLINE bool is_int() const { return m_type == Type::Int; }
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[[nodiscard]] ALWAYS_INLINE bool is_float() const { return m_type == Type::Float; }
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[[nodiscard]] ALWAYS_INLINE bool is_number() const { return is_int() || is_float(); }
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[[nodiscard]] ALWAYS_INLINE bool is_object() const { return m_type == Type::Object; }
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[[nodiscard]] ALWAYS_INLINE bool as_bool() const
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{
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VERIFY(is_bool());
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return m_as_bool;
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}
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[[nodiscard]] ALWAYS_INLINE int as_int() const
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{
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VERIFY(is_int());
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return m_as_int;
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}
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[[nodiscard]] ALWAYS_INLINE int to_int() const
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{
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if (is_int())
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return as_int();
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return static_cast<int>(as_float());
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}
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[[nodiscard]] ALWAYS_INLINE float as_float() const
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{
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VERIFY(is_float());
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return m_as_float;
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}
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[[nodiscard]] ALWAYS_INLINE float to_float() const
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{
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if (is_float())
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return as_float();
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return static_cast<float>(as_int());
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}
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[[nodiscard]] ALWAYS_INLINE NonnullRefPtr<Object> as_object() const { return *m_as_object; }
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[[nodiscard]] ALWAYS_INLINE explicit operator bool() const { return !is_null(); }
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[[nodiscard]] String to_string(int indent = 0) const;
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private:
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enum class Type {
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Null,
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Bool,
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Int,
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Float,
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Object,
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};
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union {
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bool m_as_bool;
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int m_as_int;
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float m_as_float;
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Object* m_as_object;
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};
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Type m_type;
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};
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}
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namespace AK {
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template<>
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struct Formatter<PDF::Value> : Formatter<StringView> {
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void format(FormatBuilder& builder, const PDF::Value& value)
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{
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Formatter<StringView>::format(builder, value.to_string());
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}
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};
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}
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