Initial commit

Terminal/CMakeLists.txt

@@ -0,0 +1,13 @@
+set(SOURCES
+	main.cpp
+	Terminal.cpp
+)
+
+add_executable(Terminal ${SOURCES})
+banan_link_library(Terminal ban)
+banan_link_library(Terminal libclipboard)
+banan_link_library(Terminal libfont)
+banan_link_library(Terminal libgui)
+banan_link_library(Terminal libinput)
+
+install(TARGETS Terminal OPTIONAL)

Terminal/Terminal.h

@@ -0,0 +1,128 @@
+#pragma once
+
+#include <LibFont/Font.h>
+
+#include <LibGUI/Window.h>
+
+struct Rectangle
+{
+	uint32_t x      { 0 };
+	uint32_t y      { 0 };
+	uint32_t width  { 0 };
+	uint32_t height { 0 };
+
+	Rectangle get_bounding_box(Rectangle other) const
+	{
+		const auto min_x = BAN::Math::min(x, other.x);
+		const auto min_y = BAN::Math::min(y, other.y);
+		const auto max_x = BAN::Math::max(x + width, other.x + other.width);
+		const auto max_y = BAN::Math::max(y + height, other.y + other.height);
+		return Rectangle {
+			.x = min_x,
+			.y = min_y,
+			.width = max_x - min_x,
+			.height = max_y - min_y,
+		};
+	}
+};
+
+class Terminal
+{
+public:
+	void run();
+
+	uint32_t cols() const { return m_window->width() / m_font.width(); }
+	uint32_t rows() const { return m_window->height() / m_font.height(); }
+
+private:
+	void handle_sgr(int32_t value);
+	Rectangle scroll(uint32_t scroll);
+	Rectangle handle_csi(char ch);
+	Rectangle putcodepoint(uint32_t codepoint);
+	Rectangle putchar(uint8_t ch);
+	bool read_shell();
+
+	void update_selection(bool show = true);
+
+	BAN::Optional<uint32_t> get_8bit_color();
+	BAN::Optional<uint32_t> get_24bit_color();
+
+	void hide_cursor();
+	void show_cursor();
+
+	void on_key_event(LibGUI::EventPacket::KeyEvent::event_t);
+
+	void start_shell();
+
+private:
+	struct Cursor
+	{
+		uint32_t x;
+		uint32_t y;
+	};
+
+	struct ShellInfo
+	{
+		int pts_master;
+		pid_t pid;
+	};
+
+	enum class State
+	{
+		Normal,
+		ESC,
+		CSI,
+	};
+
+	struct CSIInfo
+	{
+		static constexpr size_t max_fields = 5;
+		int32_t fields[max_fields];
+		size_t index;
+		char param;
+	};
+
+	struct Cell
+	{
+		uint32_t codepoint;
+		uint32_t fg_color;
+		uint32_t bg_color;
+		bool bold;
+	};
+
+private:
+	BAN::UniqPtr<LibGUI::Window> m_window;
+	LibFont::Font m_font;
+	ShellInfo m_shell_info;
+	State m_state { State::Normal };
+	CSIInfo m_csi_info;
+
+	BAN::Vector<Cell> m_cells;
+	uint32_t m_cells_rows { 0 };
+	uint32_t m_cells_cols { 0 };
+
+	uint32_t m_selection_s_col { UINT32_MAX };
+	uint32_t m_selection_s_row { UINT32_MAX };
+	uint32_t m_selection_e_col { UINT32_MAX };
+	uint32_t m_selection_e_row { UINT32_MAX };
+	bool m_selecting { false };
+	bool m_brackted_paste_mode { false };
+
+	bool m_cursor_shown { true };
+	bool m_cursor_blink_shown { true };
+	uint64_t m_cursor_blink_ms { 0 };
+	Cursor m_cursor { 0, 0 };
+	BAN::Vector<uint32_t> m_cursor_buffer;
+	bool m_got_key_event { false };
+
+	uint8_t m_utf8_index { 0 };
+	uint8_t m_utf8_bytes[4] { };
+
+	uint32_t m_last_graphic_char { 0 };
+
+	Cursor m_saved_cursor { 0, 0 };
+	uint32_t m_fg_color { 0 };
+	uint32_t m_bg_color { 0 };
+	bool m_colors_inverted { false };
+	bool m_is_bold { false };
+};

Terminal/main.cpp

@@ -0,0 +1,7 @@
+#include "Terminal.h"
+
+int main()
+{
+	Terminal terminal;
+	terminal.run();
+}