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https://github.com/RGBCube/serenity
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4887aacec7
The Parser class is now a generic PDF object parser, of which the new DocumentParser class derives. DocumentParser now takes over all functions relating to linearization, pages, xref and trailer handling. This allows the use of multiple parsers in the same document's context, which will be needed in order to handle PDF object streams.
70 lines
2 KiB
C++
70 lines
2 KiB
C++
/*
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* Copyright (c) 2021-2022, 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/NonnullRefPtrVector.h>
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#include <AK/SourceLocation.h>
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#include <AK/WeakPtr.h>
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#include <LibPDF/Object.h>
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#include <LibPDF/Operator.h>
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#include <LibPDF/Reader.h>
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#include <LibPDF/XRefTable.h>
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namespace PDF {
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template<typename T, typename... Args>
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static NonnullRefPtr<T> make_object(Args... args) requires(IsBaseOf<Object, T>)
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{
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return adopt_ref(*new T(forward<Args>(args)...));
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}
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class Document;
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class Parser {
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public:
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static PDFErrorOr<Vector<Operator>> parse_operators(Document*, ReadonlyBytes);
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Parser(ReadonlyBytes);
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Parser(Document*, ReadonlyBytes);
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void set_document(WeakPtr<Document> const&);
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String parse_comment();
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PDFErrorOr<Value> parse_value();
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PDFErrorOr<Value> parse_possible_indirect_value_or_ref();
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PDFErrorOr<NonnullRefPtr<IndirectValue>> parse_indirect_value(u32 index, u32 generation);
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PDFErrorOr<NonnullRefPtr<IndirectValue>> parse_indirect_value();
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PDFErrorOr<Value> parse_number();
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PDFErrorOr<NonnullRefPtr<NameObject>> parse_name();
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NonnullRefPtr<StringObject> parse_string();
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String parse_literal_string();
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String parse_hex_string();
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PDFErrorOr<NonnullRefPtr<ArrayObject>> parse_array();
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PDFErrorOr<NonnullRefPtr<DictObject>> parse_dict();
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PDFErrorOr<NonnullRefPtr<StreamObject>> parse_stream(NonnullRefPtr<DictObject> dict);
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PDFErrorOr<Vector<Operator>> parse_operators();
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protected:
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void push_reference(Reference const& ref) { m_current_reference_stack.append(ref); }
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void pop_reference() { m_current_reference_stack.take_last(); }
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Error error(
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String const& message
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#ifdef PDF_DEBUG
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,
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SourceLocation loc = SourceLocation::current()
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#endif
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) const;
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Reader m_reader;
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WeakPtr<Document> m_document;
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Vector<Reference> m_current_reference_stack;
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bool m_disable_encryption { false };
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};
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};
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