mirror of
https://github.com/RGBCube/serenity
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89 lines
2.6 KiB
C++
89 lines
2.6 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/NonnullRefPtrVector.h>
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#include <LibPDF/Command.h>
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#include <LibPDF/Object.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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class Document;
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class Parser {
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public:
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static Vector<Command> parse_graphics_commands(const ReadonlyBytes&);
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Parser(Badge<Document>, const ReadonlyBytes&);
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void set_document(RefPtr<Document> document) { m_document = document; }
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bool perform_validation();
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struct XRefTableAndTrailer {
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XRefTable xref_table;
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NonnullRefPtr<DictObject> trailer;
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};
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XRefTableAndTrailer parse_last_xref_table_and_trailer();
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NonnullRefPtr<IndirectValue> parse_indirect_value_at_offset(size_t offset);
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RefPtr<DictObject> conditionally_parse_page_tree_node_at_offset(size_t offset);
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private:
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explicit Parser(const ReadonlyBytes&);
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bool parse_header();
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XRefTable parse_xref_table();
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NonnullRefPtr<DictObject> parse_file_trailer();
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bool navigate_to_before_eof_marker();
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bool navigate_to_after_startxref();
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// If the PDF is linearized, the first object will be the linearization
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// parameter dictionary, and it will always occur within the first 1024 bytes.
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// We do a very sloppy and context-free search for this object. A return value
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// of true does not necessarily mean this PDF is linearized, but a return value
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// of false does mean this PDF is not linearized.
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// FIXME: false doesn't guarantee non-linearization, but we VERIFY the result!
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bool sloppy_is_linearized();
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String parse_comment();
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Value parse_value();
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Value parse_possible_indirect_value_or_ref();
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NonnullRefPtr<IndirectValue> parse_indirect_value(int index, int generation);
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NonnullRefPtr<IndirectValue> parse_indirect_value();
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Value parse_number();
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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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NonnullRefPtr<ArrayObject> parse_array();
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NonnullRefPtr<DictObject> parse_dict();
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NonnullRefPtr<StreamObject> parse_stream(NonnullRefPtr<DictObject> dict);
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Vector<Command> parse_graphics_commands();
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bool matches_eol() const;
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bool matches_whitespace() const;
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bool matches_number() const;
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bool matches_delimiter() const;
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bool matches_regular_character() const;
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void consume_eol();
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bool consume_whitespace();
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char consume();
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void consume(char);
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Reader m_reader;
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RefPtr<Document> m_document;
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};
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}
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