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.
116 lines
2.8 KiB
C++
116 lines
2.8 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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#include <AK/Hex.h>
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#include <LibPDF/Object.h>
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namespace PDF {
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static void append_indent(StringBuilder& builder, int indent)
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{
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for (int i = 0; i < indent; i++)
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builder.append(" ");
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}
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String StringObject::to_string(int) const
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{
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if (is_binary())
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return String::formatted("<{}>", encode_hex(string().bytes()).to_uppercase());
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return String::formatted("({})", string());
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}
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String NameObject::to_string(int) const
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{
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StringBuilder builder;
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builder.appendff("/{}", this->name());
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return builder.to_string();
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}
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String ArrayObject::to_string(int indent) const
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{
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StringBuilder builder;
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builder.append("[\n");
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bool first = true;
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for (auto& element : elements()) {
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if (!first)
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builder.append(",\n");
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first = false;
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append_indent(builder, indent + 1);
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builder.appendff("{}", element.to_string(indent));
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}
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builder.append('\n');
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append_indent(builder, indent);
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builder.append(']');
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return builder.to_string();
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}
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String DictObject::to_string(int indent) const
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{
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StringBuilder builder;
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builder.append("<<\n");
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bool first = true;
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for (auto& [key, value] : map()) {
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if (!first)
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builder.append(",\n");
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first = false;
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append_indent(builder, indent + 1);
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builder.appendff("/{} ", key);
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builder.appendff("{}", value.to_string(indent + 1));
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}
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builder.append('\n');
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append_indent(builder, indent);
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builder.append(">>");
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return builder.to_string();
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}
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String StreamObject::to_string(int indent) const
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{
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StringBuilder builder;
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builder.append("stream\n");
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append_indent(builder, indent);
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builder.appendff("{}\n", dict()->to_string(indent + 1));
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append_indent(builder, indent + 1);
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auto string = encode_hex(bytes());
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while (true) {
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if (string.length() > 60) {
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builder.appendff("{}\n", string.substring(0, 60));
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append_indent(builder, indent);
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string = string.substring(60);
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continue;
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}
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builder.appendff("{}\n", string);
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break;
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}
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append_indent(builder, indent);
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builder.append("endstream");
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return builder.to_string();
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}
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String IndirectValue::to_string(int indent) const
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{
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StringBuilder builder;
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builder.appendff("{} {} obj\n", index(), generation_index());
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append_indent(builder, indent + 1);
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builder.append(value().to_string(indent + 1));
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builder.append('\n');
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append_indent(builder, indent);
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builder.append("endobj");
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return builder.to_string();
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}
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String IndirectValueRef::to_string(int) const
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{
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return String::formatted("{} {} R", index(), generation_index());
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}
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}
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