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basic telnet

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boreddevnl
2026-03-04 09:54:57 +01:00
parent cc752052dc
commit 903d4e0510
8 changed files with 563 additions and 13 deletions
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152
src/kernel/cmd.c
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@@ -37,6 +37,7 @@
typedef struct {
char c;
uint32_t color;
uint8_t attrs; // bit 0: bold, bit 1: reverse, bit 2: blink
} CharCell;
typedef enum {
@@ -113,6 +114,11 @@ static int ansi_state = 0;
static int ansi_params[ANSI_MAX_PARAMS];
static int ansi_param_count = 0;
static bool ansi_private_mode = false;
static int saved_cursor_row = 0;
static int saved_cursor_col = 0;
static uint8_t current_attrs = 0;
static bool cursor_visible = true;
static bool terminal_raw_mode = false;
// Pager State
static CmdMode current_mode = MODE_SHELL;
@@ -172,11 +178,22 @@ static void ansi_handle_sgr() {
if (ansi_param_count == 0) {
current_color = 0xFFFFFFFF;
current_bg_color = 0;
current_attrs = 0;
return;
}
for (int i = 0; i < ansi_param_count; i++) {
int p = ansi_params[i];
if (p == 0) { current_color = 0xFFFFFFFF; current_bg_color = 0; }
if (p == 0) {
current_color = 0xFFFFFFFF;
current_bg_color = 0;
current_attrs = 0;
}
else if (p == 1) current_attrs |= 1; // Bold
else if (p == 5) current_attrs |= 4; // Blink
else if (p == 7) current_attrs |= 2; // Reverse
else if (p == 22) current_attrs &= ~1; // Normal intensity
else if (p == 25) current_attrs &= ~4; // Stop blink
else if (p == 27) current_attrs &= ~2; // Normal (not reverse)
else if (p >= 30 && p <= 37) current_color = ansi_get_256_color(p - 30);
else if (p >= 40 && p <= 47) current_bg_color = ansi_get_256_color(p - 40);
else if (p >= 90 && p <= 97) current_color = ansi_get_256_color(p - 90 + 8);
@@ -615,6 +632,10 @@ void cmd_putchar(char c) {
if (c == '\x1b') {
ansi_state = 1;
return;
} else if (c == '\x07') {
// BEL - Beep
k_beep(750, 100);
return;
}
} else if (ansi_state == 1) {
if (c == '[') {
@@ -623,6 +644,32 @@ void cmd_putchar(char c) {
for(int i=0; i<ANSI_MAX_PARAMS; i++) ansi_params[i] = 0;
ansi_private_mode = false;
return;
} else if (c == 'O') {
ansi_state = 3; // SS3
return;
} else if (c == 'M') {
// Reverse Index - scroll up if at top
if (cursor_row > 0) {
cursor_row--;
} else {
// Scroll screen down
for (int r = terminal_rows - 1; r > 0; r--) {
for (int col = 0; col < terminal_cols; col++) {
screen_buffer[r * terminal_cols + col] = screen_buffer[(r - 1) * terminal_cols + col];
}
}
for (int col = 0; col < terminal_cols; col++) {
screen_buffer[0 * terminal_cols + col].c = ' ';
screen_buffer[0 * terminal_cols + col].color = shell_config.default_text_color;
screen_buffer[0 * terminal_cols + col].attrs = 0;
}
}
ansi_state = 0;
return;
} else if (c == '=' || c == '>') {
// ALT/NORM Keypad mode - absorb
ansi_state = 0;
return;
} else {
ansi_state = 0; // Unsupported ESC sequence
}
@@ -642,7 +689,7 @@ void cmd_putchar(char c) {
// End of sequence
if (ansi_param_count < ANSI_MAX_PARAMS) ansi_param_count++;
if (c == 'm') {
if (c == 'm') {
ansi_handle_sgr();
} else if (c == 'H' || c == 'f') {
int r = ansi_params[0] > 0 ? ansi_params[0] - 1 : 0;
@@ -663,20 +710,67 @@ void cmd_putchar(char c) {
} else if (c == 'D') {
int n = ansi_params[0] > 0 ? ansi_params[0] : 1;
cursor_col -= n; if (cursor_col < 0) cursor_col = 0;
} else if (c == 's') {
saved_cursor_row = cursor_row;
saved_cursor_col = cursor_col;
} else if (c == 'u') {
cursor_row = saved_cursor_row;
cursor_col = saved_cursor_col;
} else if (c == 'J') {
if (ansi_params[0] == 2) {
cmd_screen_clear();
} else if (ansi_params[0] == 0) {
// Erase from cursor to end of screen
for (int i = cursor_row * terminal_cols + cursor_col; i < terminal_rows * terminal_cols; i++) {
screen_buffer[i].c = ' ';
screen_buffer[i].color = current_color;
screen_buffer[i].attrs = 0;
}
} else if (ansi_params[0] == 1) {
// Erase from beginning of screen to cursor
for (int i = 0; i <= cursor_row * terminal_cols + cursor_col; i++) {
screen_buffer[i].c = ' ';
screen_buffer[i].color = current_color;
screen_buffer[i].attrs = 0;
}
}
} else if (c == 'K') {
for (int i = cursor_col; i < terminal_cols; i++) {
screen_buffer[cursor_row * terminal_cols + i].c = ' ';
screen_buffer[cursor_row * terminal_cols + i].color = current_color;
if (ansi_params[0] == 0) {
for (int i = cursor_col; i < terminal_cols; i++) {
screen_buffer[cursor_row * terminal_cols + i].c = ' ';
screen_buffer[cursor_row * terminal_cols + i].color = current_color;
screen_buffer[cursor_row * terminal_cols + i].attrs = current_attrs;
}
} else if (ansi_params[0] == 1) {
for (int i = 0; i <= cursor_col; i++) {
screen_buffer[cursor_row * terminal_cols + i].c = ' ';
screen_buffer[cursor_row * terminal_cols + i].color = current_color;
screen_buffer[cursor_row * terminal_cols + i].attrs = current_attrs;
}
} else if (ansi_params[0] == 2) {
for (int i = 0; i < terminal_cols; i++) {
screen_buffer[cursor_row * terminal_cols + i].c = ' ';
screen_buffer[cursor_row * terminal_cols + i].color = current_color;
screen_buffer[cursor_row * terminal_cols + i].attrs = current_attrs;
}
}
} else if (c == 'h' && ansi_private_mode) {
if (ansi_params[0] == 25) cursor_visible = true;
} else if (c == 'l' && ansi_private_mode) {
if (ansi_params[0] == 25) cursor_visible = false;
}
ansi_state = 0;
return;
}
} else if (ansi_state == 3) {
// SS3 sequences: ESC O <char>
if (c == 'A') { cursor_row--; if (cursor_row < 0) cursor_row = 0; }
else if (c == 'B') { cursor_row++; if (cursor_row >= terminal_rows) cursor_row = terminal_rows - 1; }
else if (c == 'C') { cursor_col++; if (cursor_col >= terminal_cols) cursor_col = terminal_cols - 1; }
else if (c == 'D') { cursor_col--; if (cursor_col < 0) cursor_col = 0; }
ansi_state = 0;
return;
}
if (c == '\n') {
@@ -707,7 +801,7 @@ void cmd_putchar(char c) {
screen_buffer[cursor_row * terminal_cols + cursor_col].c = c;
screen_buffer[cursor_row * terminal_cols + cursor_col].color = current_color;
// Optionally set background color if we support it in CharCell
screen_buffer[cursor_row * terminal_cols + cursor_col].attrs = current_attrs;
cursor_col++;
}
@@ -1787,7 +1881,7 @@ static void cmd_paint(Window *win) {
draw_string(start_x, start_y + (terminal_rows * LINE_HEIGHT), "-- Press Q to quit --", shell_config.default_text_color);
} else {
// Draw Cursor
if (win->focused) {
if (win->focused && cursor_visible) {
draw_rect(start_x + (cursor_col * CHAR_WIDTH), start_y + (cursor_row * LINE_HEIGHT),
CHAR_WIDTH, LINE_HEIGHT, shell_config.cursor_color);
}
@@ -1795,14 +1889,27 @@ static void cmd_paint(Window *win) {
// Draw Shell Buffer
for (int r = 0; r < terminal_rows; r++) {
for (int c = 0; c < terminal_cols; c++) {
char ch = screen_buffer[r * terminal_cols + c].c;
CharCell cell = screen_buffer[r * terminal_cols + c];
char ch = cell.c;
if (ch != 0 && ch != ' ') {
uint32_t color = screen_buffer[r * terminal_cols + c].color;
// If cursor is on this character, and cursor color is bright, use background color for char
if (r == cursor_row && c == cursor_col && win->focused) {
color = shell_config.bg_color;
uint32_t fg = cell.color;
uint32_t bg = shell_config.bg_color;
if (cell.attrs & 2) { // Reverse
uint32_t tmp = fg;
fg = bg;
bg = tmp;
// Draw background for reversed text
draw_rect(start_x + (c * CHAR_WIDTH), start_y + (r * LINE_HEIGHT),
CHAR_WIDTH, LINE_HEIGHT, bg);
}
draw_char_bitmap(start_x + (c * CHAR_WIDTH), start_y + (r * LINE_HEIGHT), ch, color);
// If cursor is on this character, and cursor color is bright, use background color for char
if (r == cursor_row && c == cursor_col && win->focused && cursor_visible) {
fg = bg; // Character takes background color when cursor is over it
}
draw_char_bitmap(start_x + (c * CHAR_WIDTH), start_y + (r * LINE_HEIGHT), ch, fg);
}
}
}
@@ -1893,8 +2000,27 @@ void cmd_handle_click(Window *win, int x, int y) {
}
}
void cmd_set_raw_mode(bool enabled) {
terminal_raw_mode = enabled;
}
static void cmd_key(Window *target, char c) {
(void)target;
if (terminal_raw_mode) {
// Find the process associated with this terminal and push a key event
extern process_t* process_get_by_ui_window(void* win);
extern void process_push_gui_event(process_t *proc, gui_event_t *ev);
process_t *proc = process_get_by_ui_window(&win_cmd);
if (proc && proc->is_terminal_proc) {
gui_event_t ev;
ev.type = GUI_EVENT_KEY;
ev.arg1 = c;
process_push_gui_event(proc, &ev);
return;
}
}
if (current_mode == MODE_PAGER) {
if (c == 'q' || c == 'Q') {
current_mode = MODE_SHELL;