init

include/application.hpp

@@ -0,0 +1,66 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef APPLICATION_H
+#define APPLICATION_H
+
+#include "canvas.hpp"
+#include "flags.hpp"
+#include "os.hpp"
+#include "terminal.hpp"
+#include "util/ptr.hpp"
+
+#include <atomic>
+#include <cstdlib>
+#include <string>
+#include <string_view>
+#include <thread>
+
+#include <spdlog/spdlog.h>
+
+class Application
+{
+  public:
+    explicit Application(const char *executable);
+    ~Application();
+
+    void execute(std::string_view cmd);
+    void command_loop();
+    void handle_tmux_hook(std::string_view hook);
+
+    inline static std::atomic<bool> stop_flag = false; // NOLINT
+    inline static const int parent_pid = os::get_ppid();
+
+    static void print_version();
+    static void print_header();
+
+  private:
+    std::unique_ptr<Terminal> terminal;
+    std::unique_ptr<Canvas> canvas;
+
+    std::shared_ptr<Flags> flags;
+    std::shared_ptr<spdlog::logger> logger;
+
+    cn_unique_ptr<std::FILE, std::fclose> f_stderr;
+    std::thread socket_thread;
+
+    void setup_logger();
+    void set_silent();
+    void socket_loop();
+    void daemonize();
+};
+
+#endif

include/canvas.hpp

@@ -0,0 +1,38 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef CANVAS_H
+#define CANVAS_H
+
+#include "image.hpp"
+
+#include <memory>
+
+class Canvas
+{
+  public:
+    static auto create() -> std::unique_ptr<Canvas>;
+    virtual ~Canvas() = default;
+
+    virtual void add_image(const std::string &identifier, std::unique_ptr<Image> new_image) = 0;
+    virtual void remove_image(const std::string &identifier) = 0;
+
+    virtual void show() {}
+    virtual void hide() {}
+    virtual void toggle() {}
+};
+
+#endif

include/dimensions.hpp

@@ -0,0 +1,51 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef DIMENSIONS_H
+#define DIMENSIONS_H
+
+#include <cstdint>
+#include <string>
+
+#include "terminal.hpp"
+
+class Dimensions
+{
+  public:
+    Dimensions(const Terminal *terminal, uint16_t xcoord, uint16_t ycoord, int max_w, int max_h, std::string scaler);
+
+    [[nodiscard]] auto xpixels() const -> int;
+    [[nodiscard]] auto ypixels() const -> int;
+    [[nodiscard]] auto max_wpixels() const -> int;
+    [[nodiscard]] auto max_hpixels() const -> int;
+
+    uint16_t x;
+    uint16_t y;
+    uint16_t max_w;
+    uint16_t max_h;
+    uint16_t padding_horizontal;
+    uint16_t padding_vertical;
+    std::string scaler;
+    const Terminal *terminal;
+
+  private:
+    uint16_t orig_x;
+    uint16_t orig_y;
+
+    void read_offsets();
+};
+
+#endif

include/flags.hpp

@@ -0,0 +1,68 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef FLAGS_H
+#define FLAGS_H
+
+#include <filesystem>
+#include <memory>
+#include <string>
+
+// singleton
+class Flags
+{
+  public:
+    static auto instance() -> std::shared_ptr<Flags>
+    {
+        static std::shared_ptr<Flags> instance{new Flags};
+        return instance;
+    }
+
+    Flags(const Flags &) = delete;
+    Flags(Flags &) = delete;
+    auto operator=(const Flags &) -> Flags & = delete;
+    auto operator=(Flags &) -> Flags & = delete;
+
+    bool no_stdin = false;
+    bool silent = false;
+    bool use_escape_codes = false;
+    bool print_version = false;
+    bool no_cache = false;
+    bool no_opencv = false;
+    bool use_opengl = false;
+    std::string output;
+    std::string pid_file;
+    bool origin_center = false;
+    int32_t scale_factor = 1;
+    bool needs_scaling = false;
+
+    std::string cmd_id;
+    std::string cmd_action;
+    std::string cmd_socket;
+    std::string cmd_x;
+    std::string cmd_y;
+    std::string cmd_max_width;
+    std::string cmd_max_height;
+    std::string cmd_file_path;
+
+  private:
+    Flags();
+    std::filesystem::path config_file;
+
+    void read_config_file();
+};
+
+#endif

include/image.hpp

@@ -0,0 +1,54 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef IMAGE_H
+#define IMAGE_H
+
+#include <filesystem>
+#include <memory>
+#include <nlohmann/json.hpp>
+#include <string>
+
+#include "dimensions.hpp"
+#include "terminal.hpp"
+
+class Image
+{
+  public:
+    static auto load(const nlohmann::json &command, const Terminal *terminal) -> std::unique_ptr<Image>;
+    static auto check_cache(const Dimensions &dimensions, const std::filesystem::path &orig_path) -> std::string;
+    static auto get_dimensions(const nlohmann::json &json, const Terminal *terminal) -> std::shared_ptr<Dimensions>;
+
+    virtual ~Image() = default;
+
+    [[nodiscard]] virtual auto dimensions() const -> const Dimensions & = 0;
+    [[nodiscard]] virtual auto width() const -> int = 0;
+    [[nodiscard]] virtual auto height() const -> int = 0;
+    [[nodiscard]] virtual auto size() const -> size_t = 0;
+    [[nodiscard]] virtual auto data() const -> const unsigned char * = 0;
+    [[nodiscard]] virtual auto channels() const -> int = 0;
+
+    [[nodiscard]] virtual auto frame_delay() const -> int { return -1; }
+    [[nodiscard]] virtual auto is_animated() const -> bool { return false; }
+    [[nodiscard]] virtual auto filename() const -> std::string = 0;
+    virtual auto next_frame() -> void {}
+
+  protected:
+    [[nodiscard]] auto get_new_sizes(double max_width, double max_height, std::string_view scaler,
+                                     int scale_factor = 0) const -> std::pair<int, int>;
+};
+
+#endif

include/os.hpp

@@ -0,0 +1,41 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef NAMESPACE_OS_H
+#define NAMESPACE_OS_H
+
+#include <optional>
+#include <string>
+
+namespace os
+{
+
+auto exec(const std::string &cmd) -> std::string;
+auto getenv(const std::string &var) -> std::optional<std::string>;
+auto read_data_from_fd(int filde, char sep = '\n') -> std::string;
+auto read_data_from_stdin(char sep = '\n') -> std::string;
+auto wait_for_data_on_fd(int filde, int waitms) -> bool;
+auto wait_for_data_on_stdin(int waitms) -> bool;
+
+auto get_pid() -> int;
+auto get_ppid() -> int;
+
+void get_process_info(int pid);
+void daemonize();
+
+} // namespace os
+
+#endif

include/process.hpp

@@ -0,0 +1,38 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef PROCESS_INFO_H
+#define PROCESS_INFO_H
+
+#include <string>
+
+class Process
+{
+  public:
+    explicit Process(int pid);
+    ~Process() = default;
+
+    int pid;
+    char state;
+    int ppid;
+    int process_group_id;
+    int session_id;
+    int tty_nr;
+    int minor_dev;
+    std::string pty_path;
+};
+
+#endif

include/terminal.hpp

@@ -0,0 +1,89 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef TERMINAL_H
+#define TERMINAL_H
+
+#include <memory>
+#include <string>
+#include <string_view>
+
+#include <spdlog/fwd.h>
+#include <termios.h>
+
+#include "flags.hpp"
+#include "os.hpp"
+
+class Terminal
+{
+  public:
+    Terminal();
+    ~Terminal();
+
+    uint16_t font_width;
+    uint16_t font_height;
+    uint16_t padding_horizontal;
+    uint16_t padding_vertical;
+    uint16_t rows;
+    uint16_t cols;
+    int pid = os::get_pid();
+    int terminal_pid;
+    unsigned int x11_wid;
+    std::string term;
+    std::string term_program;
+    std::string detected_output;
+
+  private:
+    auto get_terminal_size() -> void;
+    static auto guess_padding(uint16_t chars, double pixels) -> double;
+    static auto guess_font_size(uint16_t chars, float pixels, float padding) -> float;
+    static auto read_raw_str(std::string_view esc) -> std::string;
+
+    void init_termios();
+    void reset_termios() const;
+
+    void check_sixel_support();
+    void check_kitty_support();
+    void check_iterm2_support();
+
+    void get_terminal_size_escape_code();
+    void get_terminal_size_xtsm();
+    void get_fallback_x11_terminal_sizes();
+    void get_fallback_wayland_terminal_sizes();
+
+    void open_first_pty();
+    void set_detected_output();
+
+    int pty_fd;
+    int xpixel = 0;
+    int ypixel = 0;
+    uint16_t fallback_xpixel = 0;
+    uint16_t fallback_ypixel = 0;
+
+    bool supports_sixel = false;
+    bool supports_kitty = false;
+    bool supports_x11 = false;
+    bool supports_iterm2 = false;
+    bool supports_wayland = false;
+
+    std::shared_ptr<Flags> flags;
+    std::shared_ptr<spdlog::logger> logger;
+
+    struct termios old_term;
+    struct termios new_term;
+};
+
+#endif

include/tmux.hpp

@@ -0,0 +1,46 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef NAMESPACE_TMUX_H
+#define NAMESPACE_TMUX_H
+
+#include <string>
+#include <vector>
+#include <optional>
+#include <string_view>
+
+namespace tmux
+{
+    auto get_session_id() -> std::string;
+    auto get_pane() -> std::string;
+
+    auto is_used() -> bool;
+    auto is_window_focused() -> bool;
+
+    auto get_client_pids() -> std::optional<std::vector<int>>;
+
+    auto get_offset() -> std::pair<int, int>;
+
+    auto get_pane_offset() -> std::pair<int, int>;
+
+    auto get_statusbar_offset() -> int;
+
+    void handle_hook(std::string_view hook, int pid);
+    void register_hooks();
+    void unregister_hooks();
+} // namespace tmux
+
+#endif

include/util.hpp

@@ -0,0 +1,67 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef NAMESPACE_UTIL_H
+#define NAMESPACE_UTIL_H
+
+#include <filesystem>
+#include <functional>
+#include <limits>
+#include <optional>
+#include <random>
+#include <string>
+#include <string_view>
+#include <vector>
+
+#include "flags.hpp"
+#include "os.hpp"
+#include "process.hpp"
+
+namespace util
+{
+auto str_split(std::string_view str, std::string_view delim) -> std::vector<std::string>;
+auto get_process_tree(int pid) -> std::vector<int>;
+auto get_process_tree_v2(int pid) -> std::vector<Process>;
+auto get_b2_hash_ssl(std::string_view str) -> std::string;
+auto get_cache_path() -> std::string;
+auto get_cache_file_save_location(const std::filesystem::path &path) -> std::string;
+auto get_log_filename() -> std::string;
+auto get_socket_path(int pid = os::get_pid()) -> std::string;
+void send_socket_message(std::string_view msg, std::string_view endpoint);
+auto base64_encode(const unsigned char *input, size_t length) -> std::string;
+void base64_encode_v2(const unsigned char *input, size_t length, unsigned char *out);
+void move_cursor(int row, int col);
+void save_cursor_position();
+void restore_cursor_position();
+void benchmark(const std::function<void(void)> &func);
+void send_command(const Flags &flags);
+void clear_terminal_area(int xcoord, int ycoord, int width, int height);
+auto generate_random_string(std::size_t length) -> std::string;
+auto round_up(int num_to_round, int multiple) -> int;
+auto temp_directory_path() -> std::filesystem::path;
+
+auto read_exif_rotation(const std::filesystem::path &path) -> std::optional<std::uint16_t>;
+template <typename T>
+auto generate_random_number(T min, T max = std::numeric_limits<T>::max()) -> T
+{
+    std::random_device dev;
+    std::mt19937 rng(dev());
+    std::uniform_int_distribution<T> dist(min, max);
+    return dist(rng);
+}
+} // namespace util
+
+#endif

include/util/dbus.hpp

@@ -0,0 +1,33 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef UEBERZUGPP_DBUS_HPP
+#define UEBERZUGPP_DBUS_HPP
+
+#include <dbus/dbus.h>
+#include <string>
+
+class DbusUtil
+{
+  public:
+    explicit DbusUtil(const std::string &address);
+    ~DbusUtil();
+
+  private:
+    DBusConnection *connection = nullptr;
+};
+
+#endif // UEBERZUGPP_DBUS_HPP

include/util/egl.hpp

@@ -0,0 +1,54 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef UTIL_EGL_H
+#define UTIL_EGL_H
+
+#include "image.hpp"
+
+#include <functional>
+#include <memory>
+
+#include <spdlog/fwd.h>
+
+#include <EGL/egl.h>
+#define GL_GLEXT_PROTOTYPES
+#include <GL/gl.h>
+
+template <class T, class V>
+class EGLUtil
+{
+  public:
+    EGLUtil(EGLenum platform, T *native_display, const EGLAttrib *attrib = nullptr);
+    ~EGLUtil();
+
+    void get_texture_from_image(const Image &image, GLuint texture) const;
+    void run_contained(EGLSurface surface, EGLContext context, const std::function<void()> &func) const;
+    void make_current(EGLSurface surface, EGLContext context) const;
+    void restore() const;
+    [[nodiscard]] auto create_surface(V *native_window) const -> EGLSurface;
+    [[nodiscard]] auto create_context(EGLSurface surface) const -> EGLContext;
+
+    EGLDisplay display;
+
+  private:
+    EGLConfig config;
+    std::shared_ptr<spdlog::logger> logger;
+
+    [[nodiscard]] auto error_to_string() const -> std::string;
+};
+
+#endif

include/util/ptr.hpp

@@ -0,0 +1,53 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef UTIL_PTR_H
+#define UTIL_PTR_H
+
+#include <memory>
+
+template <auto fn>
+struct deleter_from_fn {
+    template <typename T>
+    constexpr void operator()(T *arg) const
+    {
+        fn(const_cast<std::remove_const_t<T> *>(arg));
+    }
+};
+
+template <auto fn>
+struct deleter_from_fn_null {
+    template <typename T>
+    constexpr void operator()(T *arg) const
+    {
+        if (arg != nullptr) {
+            fn(const_cast<std::remove_const_t<T> *>(arg));
+        }
+    }
+};
+
+// custom unique pointer
+template <typename T, auto fn>
+using c_unique_ptr = std::unique_ptr<T, deleter_from_fn<fn>>;
+
+// custom unique pointer that checks for null before deleting
+template <typename T, auto fn>
+using cn_unique_ptr = std::unique_ptr<T, deleter_from_fn_null<fn>>;
+
+template <typename T>
+using unique_C_ptr = std::unique_ptr<T, deleter_from_fn<std::free>>;
+
+#endif

include/util/socket.hpp

@@ -0,0 +1,46 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef UTIL_SOCKET_H
+#define UTIL_SOCKET_H
+
+#include <cstdint>
+#include <string>
+#include <string_view>
+#include <vector>
+
+class UnixSocket
+{
+  public:
+    UnixSocket();
+    explicit UnixSocket(std::string_view endpoint);
+    ~UnixSocket();
+
+    void connect_to_endpoint(std::string_view endpoint);
+    void bind_to_endpoint(std::string_view endpoint) const;
+    [[nodiscard]] auto wait_for_connections(int waitms) const -> int;
+    [[nodiscard]] auto read_data_from_connection(int filde) -> std::vector<std::string>;
+    void write(const void *data, std::size_t len) const;
+    void read(void *data, std::size_t len) const;
+    [[nodiscard]] auto read_until_empty() const -> std::string;
+
+  private:
+    int fd;
+    bool connected = true;
+    std::string buffer;
+};
+
+#endif

include/util/x11.hpp

@@ -0,0 +1,49 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef X11_UTIL_H
+#define X11_UTIL_H
+
+#include <initializer_list>
+#include <memory>
+#include <unordered_map>
+#include <vector>
+
+#include <xcb/xcb.h>
+
+class X11Util
+{
+  public:
+    X11Util();
+    explicit X11Util(xcb_connection_t *connection);
+    ~X11Util();
+
+    [[nodiscard]] auto get_server_window_ids() const -> std::vector<xcb_window_t>;
+    [[nodiscard]] auto get_pid_window_map() const -> std::unordered_map<uint32_t, xcb_window_t>;
+    [[nodiscard]] auto get_window_dimensions(xcb_window_t window) const -> std::pair<uint16_t, uint16_t>;
+    [[nodiscard]] auto get_parent_window(int pid) const -> xcb_window_t;
+    [[nodiscard]] auto window_has_properties(xcb_window_t window, std::initializer_list<xcb_atom_t> properties) const
+        -> bool;
+
+    bool connected = false;
+
+  private:
+    xcb_connection_t *connection;
+    xcb_screen_t *screen = nullptr;
+    bool owns_connection = true;
+};
+
+#endif

include/version.hpp.in

@@ -0,0 +1,19 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#define ueberzugpp_VERSION_MAJOR @ueberzugpp_VERSION_MAJOR@
+#define ueberzugpp_VERSION_MINOR @ueberzugpp_VERSION_MINOR@
+#define ueberzugpp_VERSION_PATCH @ueberzugpp_VERSION_PATCH@

include/window.hpp

@@ -0,0 +1,36 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef WINDOW_H
+#define WINDOW_H
+
+#include <concepts>
+#include <memory>
+
+class Window
+{
+public:
+    virtual ~Window() = default;
+    virtual void draw() = 0;
+    virtual void generate_frame() = 0;
+    virtual void show() {};
+    virtual void hide() {};
+};
+
+template<class T>
+concept WindowType = std::is_base_of<Window, T>::value;
+
+#endif