Implement Virtual Terminal and fix /dev/kcon

include/kcon.hpp

@@ -18,11 +18,130 @@
 #ifndef __FENNIX_KERNEL_KERNEL_CONSOLE_H__
 #define __FENNIX_KERNEL_KERNEL_CONSOLE_H__
 
+#include <display.hpp>
 #include <termios.h>
+#include <atomic>
 
 namespace KernelConsole
 {
+	enum TerminalColor
+	{
+		BLACK,
+		RED,
+		GREEN,
+		YELLOW,
+		BLUE,
+		MAGENTA,
+		CYAN,
+		GREY
+	};
+
+	struct ANSIArgument
+	{
+		int Value = 0;
+		bool Empty = true;
+	};
+
+	struct ANSIParser
+	{
+		enum ParserState
+		{
+			Escape,
+			Bracket,
+			Attribute,
+			EndValue
+		} State = Escape;
+
+		ANSIArgument Stack[8] = {};
+		int Index = 0;
+	};
+
+	struct TerminalAttribute
+	{
+		bool Bright = false;
+		TerminalColor Background = BLACK;
+		TerminalColor Foreground = GREY;
+	};
+
+	struct TerminalCell
+	{
+		char c = '\0';
+		TerminalAttribute attr{};
+	};
+
+	struct TerminalCursor
+	{
+		long X = 0;
+		long Y = 0;
+	};
+
+	typedef void (*PaintCallback)(TerminalCell *Cell, long X, long Y);
+	typedef void (*CursorCallback)(TerminalCursor *Cursor);
+
+	class FontRenderer
+	{
+	public:
+		Video::Font *CurrentFont = nullptr;
+		TerminalCursor Cursor = {0, 0};
+		char Paint(long CellX, long CellY, char Char, uint32_t Foreground, uint32_t Background);
+	};
+
+	class VirtualTerminal
+	{
+	private:
+		ANSIParser Parser{};
+		TerminalAttribute Attribute{};
+
+		TerminalCell *Cells = nullptr;
+		TerminalCursor Cursor{};
+
+		PaintCallback PaintCB = nullptr;
+		CursorCallback CursorCB = nullptr;
+
+	public:
+		termios term;
+		winsize termSize;
+
+		void Clear(unsigned short StartX, unsigned short StartY, unsigned short EndX, unsigned short EndY);
+		void Scroll(unsigned short Lines);
+		void NewLine();
+		void Append(char c);
+		void csi_cup(ANSIArgument *Args, int ArgsCount);
+		void csi_ed(ANSIArgument *Args, int ArgsCount);
+		void csi_el(ANSIArgument *Args, int ArgsCount);
+		void csi_sgr(ANSIArgument *Args, int ArgsCount);
+		void csi_cuu(ANSIArgument *Args, int ArgsCount);
+		void csi_cud(ANSIArgument *Args, int ArgsCount);
+		void csi_cuf(ANSIArgument *Args, int ArgsCount);
+		void csi_cub(ANSIArgument *Args, int ArgsCount);
+		void csi_cnl(ANSIArgument *Args, int ArgsCount);
+		void csi_cpl(ANSIArgument *Args, int ArgsCount);
+		void csi_cha(ANSIArgument *Args, int ArgsCount);
+		void Process(char c);
+
+		VirtualTerminal(unsigned short Rows, unsigned short Columns,
+						unsigned short XPixels, unsigned short YPixels,
+						PaintCallback Paint, CursorCallback Print);
+		~VirtualTerminal();
+	};
+
+	/**
+	 * 0 - Default
+	 * 1...11 - User
+	 * ...
+	 * 15 - Panic
+	 */
+	extern VirtualTerminal *Terminals[16];
+	extern std::atomic<VirtualTerminal *> CurrentTerminal;
+	extern int TermColors[];
+	extern int TermBrightColors[];
+
+	bool SetTheme(std::string Theme);
+
+	/* Limited in functionality */
 	void EarlyInit();
+
+	/* Full working terminal */
 	void LateInit();
 }