mirror of
https://github.com/RGBCube/serenity
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fc5cab5c21
This is easily identifiable by anyone who uses Duration::now_monotonic, and any downstream users of that data.
113 lines
3.1 KiB
C++
113 lines
3.1 KiB
C++
/*
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* Copyright (c) 2021, Arne Elster <arne@elster.li>
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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/HashMap.h>
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#include <AK/NonnullOwnPtr.h>
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#include <AK/StringView.h>
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#include <AK/Time.h>
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#include <AK/Types.h>
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#include <AK/WeakPtr.h>
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#include <LibCore/Forward.h>
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#include <LibGUI/Command.h>
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constexpr Duration COMMAND_COMMIT_TIME = Duration::from_milliseconds(400);
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class HexDocument : public Weakable<HexDocument> {
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public:
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enum class Type {
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Memory,
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File
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};
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struct Cell {
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u8 value;
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bool modified;
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};
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virtual ~HexDocument() = default;
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virtual Cell get(size_t position) = 0;
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virtual u8 get_unchanged(size_t position) = 0;
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virtual void set(size_t position, u8 value);
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virtual size_t size() const = 0;
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virtual Type type() const = 0;
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virtual bool is_dirty() const;
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virtual void clear_changes() = 0;
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protected:
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HashMap<size_t, u8> m_changes;
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};
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class HexDocumentMemory final : public HexDocument {
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public:
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explicit HexDocumentMemory(ByteBuffer&& buffer);
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virtual ~HexDocumentMemory() = default;
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Cell get(size_t position) override;
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u8 get_unchanged(size_t position) override;
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size_t size() const override;
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Type type() const override;
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void clear_changes() override;
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ErrorOr<void> write_to_file(Core::File& file);
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private:
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ByteBuffer m_buffer;
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};
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class HexDocumentFile final : public HexDocument {
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public:
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static ErrorOr<NonnullOwnPtr<HexDocumentFile>> create(NonnullOwnPtr<Core::File> file);
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virtual ~HexDocumentFile() = default;
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HexDocumentFile(HexDocumentFile&&) = default;
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HexDocumentFile(HexDocumentFile const&) = delete;
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ErrorOr<void> set_file(NonnullOwnPtr<Core::File> file);
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NonnullOwnPtr<Core::File> const& file() const;
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ErrorOr<void> write_to_file();
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ErrorOr<void> write_to_file(Core::File& file);
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Cell get(size_t position) override;
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u8 get_unchanged(size_t position) override;
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size_t size() const override;
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Type type() const override;
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void clear_changes() override;
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private:
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explicit HexDocumentFile(NonnullOwnPtr<Core::File> file);
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ErrorOr<void> initialize_internal_state();
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void ensure_position_in_buffer(size_t position);
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NonnullOwnPtr<Core::File> m_file;
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size_t m_file_size;
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Array<u8, 2048> m_buffer;
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size_t m_buffer_file_pos;
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};
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class HexDocumentUndoCommand : public GUI::Command {
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public:
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HexDocumentUndoCommand(WeakPtr<HexDocument> document, size_t position);
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virtual void undo() override;
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virtual void redo() override;
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virtual DeprecatedString action_text() const override { return "Update cell"; }
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virtual bool merge_with(GUI::Command const& other) override;
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ErrorOr<void> try_add_changed_byte(u8 old_value, u8 new_value);
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ErrorOr<void> try_add_changed_bytes(ByteBuffer old_values, ByteBuffer new_values);
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private:
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bool commit_time_expired() const { return MonotonicTime::now() - m_timestamp >= COMMAND_COMMIT_TIME; }
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MonotonicTime m_timestamp = MonotonicTime::now();
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WeakPtr<HexDocument> m_document;
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size_t m_position;
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ByteBuffer m_old;
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ByteBuffer m_new;
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};
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