1 files changed, 249 insertions, 0 deletions
diff --git a/kernel/include/drivers/tty/vterminal.h b/kernel/include/drivers/tty/vterminal.h
new file mode 100644
index 0000000..99123a7
--- /dev/null
+++ b/kernel/include/drivers/tty/vterminal.h
@@ -0,0 +1,249 @@
+#pragma once
+
+#include <drivers/screen.h>
+#include <mm/page.h>
+#include <types.h>
+#include <util/list.h>
+//
+//
+//#define VGA_WIDTH ((uint16_t) 80)
+//#define VGA_HEIGHT ((uint16_t) 25)
+//#define VGA_AREA ((uint16_t) (VGA_WIDTH * VGA_HEIGHT))
+//#define VGA_BUFFER_COUNT ((uint16_t) (1024 * 16))
+//#define VGA_BUFFER_SIZE ((uint16_t) (VGA_BUFFER_COUNT * sizeof(short)))
+//
+//
+//#define SCREEN_GET_FOREGROUND(x) ((uint8_t) (x & 0b00001111))
+//#define SCREEN_GET_BACKGROUND(x) ((uint8_t) (x & 0b01110000))
+//#define SCREEN_MAKE_COLOR(b, f)  ((uint8_t) (b << 4) | f)
+//
+//#define SCREEN_DEFAULT_FOREGROUND ((uint8_t) 0xF)
+//#define SCREEN_DEFAULT_BACKGROUND ((uint8_t) 0x0)
+//#define SCREEN_DEFAULT_COLOR SCREEN_MAKE_COLOR(SCREEN_DEFAULT_BACKGROUND,
+//SCREEN_DEFAULT_FOREGROUND)
+
+// typedef struct screen {
+//    uint16_t screen_cursor_pos;
+//    uint16_t screen_buffer_pos;
+//    uint16_t screen_visible_pos;
+//    uint8_t screen_current_color;
+//
+//    uint16_t *screen_buffer;
+//    uint16_t screen_inactive_buffer[VGA_BUFFER_COUNT];
+//} screen_t;
+
+// typedef struct vterminal_char {
+//    char c;
+////    color_t foreground;
+////    color_t background;
+//} vterminal_char_t;
+
+#ifdef __VGABUF___
+
+#define VT_PAGES_PER_HISTORY_CHUNK 1
+#define VT_CHARS_PER_HISTORY_CHUNK \
+    (VT_PAGES_PER_HISTORY_CHUNK * PAGE_SIZE - sizeof(list_link_t))
+
+typedef struct vterminal_history_chunk
+{
+    char chars[VT_CHARS_PER_HISTORY_CHUNK];
+    list_link_t link;
+} vterminal_history_chunk_t;
+
+typedef struct vterminal
+{
+    size_t vt_width;
+    size_t vt_height;
+
+    size_t vt_len;
+    list_t vt_history_chunks;
+
+    size_t *vt_line_positions;
+
+    off_t vt_line_offset;
+
+    size_t *vt_line_widths;
+
+    size_t vt_input_pos;
+    size_t vt_cursor_pos;
+} vterminal_t;
+
+void vterminal_init(vterminal_t *vt);
+
+void vterminal_make_active(vterminal_t *vt);
+
+void vterminal_scroll(vterminal_t *vt, long count);
+
+void vterminal_scroll_to_bottom(vterminal_t *t);
+
+void vterminal_clear(vterminal_t *vt);
+
+size_t vterminal_write(vterminal_t *vt, const char *buf, size_t len);
+
+void vterminal_key_pressed(vterminal_t *vt);
+
+#elif 0
+
+struct vt_cursor
+{
+    int y;
+    int x;
+};
+
+struct vt_attributes
+{
+    int underline : 1;
+    int bold : 1;
+    int blink : 1;
+    uint16_t fg;
+    uint16_t bg;
+};
+
+struct vt_char
+{
+    int codepoint;
+    struct vt_attributes attribs;
+};
+
+struct vt_buffer
+{
+    struct vt_char screen[VGA_HEIGHT][VGA_WIDTH];
+    size_t input_position;
+};
+
+typedef struct vterminal
+{
+    size_t height;
+    size_t width;
+    struct vt_cursor cursor;
+    struct vt_cursor saved_cursor;
+    struct vt_attributes current_attribs;
+    struct vt_buffer *active_buffer;
+    struct vt_buffer pri_buffer;
+    struct vt_buffer alt_buffer;
+} vterminal_t;
+
+void vterminal_init(vterminal_t *vt);
+
+void vterminal_make_active(vterminal_t *vt);
+
+void vterminal_scroll(vterminal_t *vt, long count);
+
+void vterminal_clear(vterminal_t *vt);
+
+size_t vterminal_write(vterminal_t *vt, const char *buf, size_t len);
+
+size_t vterminal_echo_input(vterminal_t *vt, const char *buf, size_t len);
+
+void vterminal_key_pressed(vterminal_t *vt);
+
+void vterminal_scroll_to_bottom(vterminal_t *vt);
+
+#endif
+
+#define VTC_DEFAULT_FOREGROUND VTCOLOR_GREY
+#define VTC_DEFAULT_BACKGROUND VTCOLOR_BLACK
+#define VTC_DEFAULT_ATTR \
+    (vtattr_t) { 0, VTC_DEFAULT_FOREGROUND, VTC_DEFAULT_BACKGROUND }
+#define VTC_ANSI_PARSER_STACK_SIZE 8
+
+struct vtconsole;
+
+typedef enum
+{
+    VTCOLOR_BLACK,
+    VTCOLOR_RED,
+    VTCOLOR_GREEN,
+    VTCOLOR_YELLOW,
+    VTCOLOR_BLUE,
+    VTCOLOR_MAGENTA,
+    VTCOLOR_CYAN,
+    VTCOLOR_GREY,
+} vtcolor_t;
+
+typedef enum
+{
+    VTSTATE_ESC,
+    VTSTATE_BRACKET,
+    VTSTATE_ATTR,
+    VTSTATE_ENDVAL,
+} vtansi_parser_state_t;
+
+typedef struct
+{
+    int value;
+    int empty;
+} vtansi_arg_t;
+
+typedef struct
+{
+    vtansi_parser_state_t state;
+    vtansi_arg_t stack[VTC_ANSI_PARSER_STACK_SIZE];
+    int index;
+} vtansi_parser_t;
+
+typedef struct
+{
+    int bright;
+    vtcolor_t fg;
+    vtcolor_t bg;
+} vtattr_t;
+
+typedef struct
+{
+    char c;
+    vtattr_t attr;
+} vtcell_t;
+
+typedef struct
+{
+    int x;
+    int y;
+} vtcursor_t;
+
+typedef void (*vtc_paint_handler_t)(struct vtconsole *vtc, vtcell_t *cell,
+                                    int x, int y);
+typedef void (*vtc_cursor_handler_t)(struct vtconsole *vtc, vtcursor_t *cur);
+
+typedef struct vtconsole
+{
+    int width;
+    int height;
+
+    vtattr_t attr;
+    vtansi_parser_t ansiparser;
+
+    vtcell_t *buffer;
+    int *tabs;
+    int tab_index;
+    vtcursor_t cursor;
+
+    vtc_paint_handler_t on_paint;
+    vtc_cursor_handler_t on_move;
+} vtconsole_t;
+
+typedef vtconsole_t vterminal_t;
+
+vtconsole_t *vtconsole(vtconsole_t *vtc, int width, int height,
+                       vtc_paint_handler_t on_paint,
+                       vtc_cursor_handler_t on_move);
+void vtconsole_delete(vtconsole_t *c);
+
+void vtconsole_clear(vtconsole_t *vtc, int fromx, int fromy, int tox, int toy);
+void vtconsole_scroll(vtconsole_t *vtc, int lines);
+void vtconsole_newline(vtconsole_t *vtc);
+
+void vtconsole_putchar(vtconsole_t *vtc, char c);
+void vtconsole_write(vtconsole_t *vtc, const char *buffer, uint32_t size);
+
+size_t vterminal_write(vterminal_t *vt, const char *buf, size_t len);
+
+size_t vterminal_echo_input(vterminal_t *vt, const char *buf, size_t len);
+
+void vterminal_key_pressed(vterminal_t *vt);
+
+void vterminal_scroll_to_bottom(vterminal_t *vt);
+
+void vterminal_init(vterminal_t *vt);
+
+void vterminal_make_active(vterminal_t *vt);