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/*
* Copyright (c) 2022, kleines Filmröllchen <filmroellchen@serenityos.org>
* Copyright (c) 2023, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include "Slide.h"
#include <AK/DeprecatedString.h>
#include <AK/HashMap.h>
#include <AK/NonnullOwnPtr.h>
#include <AK/Vector.h>
#include <LibGfx/Size.h>
static constexpr int const PRESENTATION_FORMAT_VERSION = 1;
// In-memory representation of the presentation stored in a file.
// This class also contains all the parser code for loading .presenter files.
class Presentation {
public:
~Presentation() = default;
static ErrorOr<NonnullOwnPtr<Presentation>> load_from_file(StringView file_name);
StringView title() const;
StringView author() const;
Gfx::IntSize normative_size() const { return m_normative_size; }
Slide const& current_slide() const { return m_slides[m_current_slide.value()]; }
unsigned current_slide_number() const { return m_current_slide.value(); }
unsigned current_frame_in_slide_number() const { return m_current_frame_in_slide.value(); }
bool has_a_next_frame() const;
bool has_a_previous_frame() const;
void next_frame();
void previous_frame();
void go_to_first_slide();
ErrorOr<DeprecatedString> render();
private:
static HashMap<DeprecatedString, DeprecatedString> parse_metadata(JsonObject const& metadata_object);
static ErrorOr<Gfx::IntSize> parse_presentation_size(JsonObject const& metadata_object);
Presentation(Gfx::IntSize normative_size, HashMap<DeprecatedString, DeprecatedString> metadata);
static NonnullOwnPtr<Presentation> construct(Gfx::IntSize normative_size, HashMap<DeprecatedString, DeprecatedString> metadata);
void append_slide(Slide slide);
Vector<Slide> m_slides {};
// This is not a pixel size, but an abstract size used by the slide objects for relative positioning.
Gfx::IntSize m_normative_size;
HashMap<DeprecatedString, DeprecatedString> m_metadata;
Checked<unsigned> m_current_slide { 0 };
Checked<unsigned> m_current_frame_in_slide { 0 };
};
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