mirror of
https://github.com/RGBCube/serenity
synced 2025-05-18 16:45:09 +00:00
57dc179b1f
This will make it easier to support both string types at the same time while we convert code, and tracking down remaining uses. One big exception is Value::to_string() in LibJS, where the name is dictated by the ToString AO.
260 lines
8.2 KiB
C++
260 lines
8.2 KiB
C++
/*
|
|
* Copyright (c) 2021-2022, Matthew Olsson <mattco@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Format.h>
|
|
#include <AK/HashMap.h>
|
|
#include <AK/RefCounted.h>
|
|
#include <AK/Weakable.h>
|
|
#include <LibGfx/Color.h>
|
|
#include <LibPDF/DocumentParser.h>
|
|
#include <LibPDF/Encryption.h>
|
|
#include <LibPDF/Error.h>
|
|
#include <LibPDF/ObjectDerivatives.h>
|
|
|
|
namespace PDF {
|
|
|
|
struct Rectangle {
|
|
float lower_left_x;
|
|
float lower_left_y;
|
|
float upper_right_x;
|
|
float upper_right_y;
|
|
|
|
float width() const { return upper_right_x - lower_left_x; }
|
|
float height() const { return upper_right_y - lower_left_y; }
|
|
};
|
|
|
|
struct Page {
|
|
NonnullRefPtr<DictObject> resources;
|
|
NonnullRefPtr<Object> contents;
|
|
Rectangle media_box;
|
|
Rectangle crop_box;
|
|
float user_unit;
|
|
int rotate;
|
|
};
|
|
|
|
struct Destination {
|
|
enum class Type {
|
|
XYZ,
|
|
Fit,
|
|
FitH,
|
|
FitV,
|
|
FitR,
|
|
FitB,
|
|
FitBH,
|
|
FitBV,
|
|
};
|
|
|
|
Type type;
|
|
Value page;
|
|
Vector<float> parameters;
|
|
};
|
|
|
|
struct OutlineItem final : public RefCounted<OutlineItem> {
|
|
RefPtr<OutlineItem> parent;
|
|
NonnullRefPtrVector<OutlineItem> children;
|
|
DeprecatedString title;
|
|
i32 count { 0 };
|
|
Destination dest;
|
|
Gfx::Color color { Color::NamedColor::Black }; // 'C' in the PDF spec
|
|
bool italic { false }; // bit 0 of 'F' in the PDF spec
|
|
bool bold { false }; // bit 0 of 'F' in the PDF spec
|
|
|
|
OutlineItem() = default;
|
|
|
|
DeprecatedString to_deprecated_string(int indent) const;
|
|
};
|
|
|
|
struct OutlineDict final : public RefCounted<OutlineDict> {
|
|
NonnullRefPtrVector<OutlineItem> children;
|
|
u32 count { 0 };
|
|
|
|
OutlineDict() = default;
|
|
};
|
|
|
|
class Document final
|
|
: public RefCounted<Document>
|
|
, public Weakable<Document> {
|
|
public:
|
|
static PDFErrorOr<NonnullRefPtr<Document>> create(ReadonlyBytes bytes);
|
|
|
|
// If a security handler is present, it is the caller's responsibility to ensure
|
|
// this document is unencrypted before calling this function. The user does not
|
|
// need to handle the case where the user password is the empty string.
|
|
PDFErrorOr<void> initialize();
|
|
|
|
ALWAYS_INLINE RefPtr<SecurityHandler> const& security_handler() const { return m_security_handler; }
|
|
|
|
ALWAYS_INLINE RefPtr<OutlineDict> const& outline() const { return m_outline; }
|
|
|
|
ALWAYS_INLINE RefPtr<DictObject> const& trailer() const { return m_trailer; }
|
|
|
|
[[nodiscard]] PDFErrorOr<Value> get_or_load_value(u32 index);
|
|
|
|
[[nodiscard]] u32 get_first_page_index() const;
|
|
|
|
[[nodiscard]] u32 get_page_count() const;
|
|
|
|
[[nodiscard]] PDFErrorOr<Page> get_page(u32 index);
|
|
|
|
ALWAYS_INLINE Value get_value(u32 index) const
|
|
{
|
|
return m_values.get(index).value_or({});
|
|
}
|
|
|
|
// Strips away the layer of indirection by turning indirect value
|
|
// refs into the value they reference, and indirect values into
|
|
// the value being wrapped.
|
|
PDFErrorOr<Value> resolve(Value const& value);
|
|
|
|
// Like resolve, but unwraps the Value into the given type. Accepts
|
|
// any object type, and the three primitive Value types.
|
|
template<IsValueType T>
|
|
PDFErrorOr<UnwrappedValueType<T>> resolve_to(Value const& value)
|
|
{
|
|
auto resolved = TRY(resolve(value));
|
|
|
|
if constexpr (IsSame<T, bool>)
|
|
return resolved.get<bool>();
|
|
else if constexpr (IsSame<T, int>)
|
|
return resolved.get<int>();
|
|
else if constexpr (IsSame<T, float>)
|
|
return resolved.get<float>();
|
|
else if constexpr (IsSame<T, Object>)
|
|
return resolved.get<NonnullRefPtr<Object>>();
|
|
else if constexpr (IsObject<T>)
|
|
return resolved.get<NonnullRefPtr<Object>>()->cast<T>();
|
|
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
|
|
private:
|
|
explicit Document(NonnullRefPtr<DocumentParser> const& parser);
|
|
|
|
// FIXME: Currently, to improve performance, we don't load any pages at Document
|
|
// construction, rather we just load the page structure and populate
|
|
// m_page_object_indices. However, we can be even lazier and defer page tree node
|
|
// parsing, as good PDF writers will layout the page tree in a balanced tree to
|
|
// improve lookup time. This would reduce the initial overhead by not loading
|
|
// every page tree node of, say, a 1000+ page PDF file.
|
|
PDFErrorOr<void> build_page_tree();
|
|
PDFErrorOr<void> add_page_tree_node_to_page_tree(NonnullRefPtr<DictObject> const& page_tree);
|
|
|
|
PDFErrorOr<void> build_outline();
|
|
PDFErrorOr<NonnullRefPtr<OutlineItem>> build_outline_item(NonnullRefPtr<DictObject> const& outline_item_dict);
|
|
PDFErrorOr<NonnullRefPtrVector<OutlineItem>> build_outline_item_chain(Value const& first_ref, Value const& last_ref);
|
|
|
|
PDFErrorOr<Destination> create_destination_from_parameters(NonnullRefPtr<ArrayObject>);
|
|
|
|
PDFErrorOr<NonnullRefPtr<Object>> get_inheritable_object(FlyString const& name, NonnullRefPtr<DictObject>);
|
|
|
|
NonnullRefPtr<DocumentParser> m_parser;
|
|
RefPtr<DictObject> m_catalog;
|
|
RefPtr<DictObject> m_trailer;
|
|
Vector<u32> m_page_object_indices;
|
|
HashMap<u32, Page> m_pages;
|
|
HashMap<u32, Value> m_values;
|
|
RefPtr<OutlineDict> m_outline;
|
|
RefPtr<SecurityHandler> m_security_handler;
|
|
};
|
|
|
|
}
|
|
|
|
namespace AK {
|
|
|
|
template<>
|
|
struct Formatter<PDF::Rectangle> : Formatter<FormatString> {
|
|
ErrorOr<void> format(FormatBuilder& builder, PDF::Rectangle const& rectangle)
|
|
{
|
|
return Formatter<FormatString>::format(builder,
|
|
"Rectangle {{ ll=({}, {}), ur=({}, {}) }}"sv,
|
|
rectangle.lower_left_x,
|
|
rectangle.lower_left_y,
|
|
rectangle.upper_right_x,
|
|
rectangle.upper_right_y);
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct Formatter<PDF::Page> : Formatter<FormatString> {
|
|
ErrorOr<void> format(FormatBuilder& builder, PDF::Page const& page)
|
|
{
|
|
return Formatter<FormatString>::format(builder,
|
|
"Page {{\n resources={}\n contents={}\n media_box={}\n crop_box={}\n user_unit={}\n rotate={}\n}}"sv,
|
|
page.resources->to_deprecated_string(1),
|
|
page.contents->to_deprecated_string(1),
|
|
page.media_box,
|
|
page.crop_box,
|
|
page.user_unit,
|
|
page.rotate);
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct Formatter<PDF::Destination> : Formatter<FormatString> {
|
|
ErrorOr<void> format(FormatBuilder& builder, PDF::Destination const& destination)
|
|
{
|
|
StringView type_str;
|
|
switch (destination.type) {
|
|
case PDF::Destination::Type::XYZ:
|
|
type_str = "XYZ"sv;
|
|
break;
|
|
case PDF::Destination::Type::Fit:
|
|
type_str = "Fit"sv;
|
|
break;
|
|
case PDF::Destination::Type::FitH:
|
|
type_str = "FitH"sv;
|
|
break;
|
|
case PDF::Destination::Type::FitV:
|
|
type_str = "FitV"sv;
|
|
break;
|
|
case PDF::Destination::Type::FitR:
|
|
type_str = "FitR"sv;
|
|
break;
|
|
case PDF::Destination::Type::FitB:
|
|
type_str = "FitB"sv;
|
|
break;
|
|
case PDF::Destination::Type::FitBH:
|
|
type_str = "FitBH"sv;
|
|
break;
|
|
case PDF::Destination::Type::FitBV:
|
|
type_str = "FitBV"sv;
|
|
break;
|
|
}
|
|
|
|
StringBuilder param_builder;
|
|
for (auto& param : destination.parameters)
|
|
param_builder.appendff("{} ", param);
|
|
|
|
return Formatter<FormatString>::format(builder, "{{ type={} page={} params={} }}"sv, type_str, destination.page, param_builder.to_deprecated_string());
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct Formatter<PDF::OutlineItem> : Formatter<FormatString> {
|
|
ErrorOr<void> format(FormatBuilder& builder, PDF::OutlineItem const& item)
|
|
{
|
|
return builder.put_string(item.to_deprecated_string(0));
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct Formatter<PDF::OutlineDict> : Formatter<FormatString> {
|
|
ErrorOr<void> format(FormatBuilder& builder, PDF::OutlineDict const& dict)
|
|
{
|
|
StringBuilder child_builder;
|
|
child_builder.append('[');
|
|
for (auto& child : dict.children)
|
|
child_builder.appendff("{}\n", child.to_deprecated_string(2));
|
|
child_builder.append(" ]"sv);
|
|
|
|
return Formatter<FormatString>::format(builder,
|
|
"OutlineDict {{\n count={}\n children={}\n}}"sv, dict.count, child_builder.to_deprecated_string());
|
|
}
|
|
};
|
|
|
|
}
|