added tabs to edit

Author: Glowman554

user/edit/include/edit.h

@@ -8,7 +8,8 @@ typedef struct edit_state {
 	char* input_buffer;
 	bool is_edited;
 	bool is_in_insert_mode;
-
+	bool show_tab_char;
+	
 	unsigned int ln_cnt;
 	unsigned int char_cnt;
 

user/edit/input.c

@@ -129,6 +129,10 @@ bool listen_input(edit_state_t* state) {
 					move_down(state);
 					break;
 
+				case 't':
+					state->show_tab_char = !state->show_tab_char;
+					break;
+
 				case '+':
 					state->file = freopen(state->file_name, "w", state->file);
 					fseek(state->file, 0, SEEK_SET);

user/edit/main.c

@@ -54,6 +54,12 @@ int main(int argc, char* argv[], char* envp[]) {
 
 		idx++;
 	}
+	
+	if (file_name == NULL) {
+		printf("Error: No file name provided\n");
+		print_usage(argv[0]);
+		return 1;
+	}
 
 
 	if (!getenv("NOSYX")) {
@@ -72,6 +78,7 @@ int main(int argc, char* argv[], char* envp[]) {
 	state.is_edited = false;
 	state.is_in_insert_mode = true;
 	state.read_only = read_only;
+	state.show_tab_char = false;
 
 	state.file = fopen(file_name, "r");
 	if (state.file == NULL) {

user/edit/render.c

@@ -4,6 +4,8 @@
 #include <string.h>
 #include <stdlib.h>
 
+#define TAB_WIDTH 4
+
 syntax_header_t* syntax = NULL;
 
 
@@ -29,6 +31,14 @@ void rerender_color(edit_state_t* state) {
 	}
 }
 
+void draw_line_number(int cur_y, int current_line) {
+	char buff[16] = { 0 };
+	memset(buff, 0, sizeof(buff));
+	sprintf(buff, "%d.", current_line);
+	draw_string(0, cur_y, buff, BACKGROUND_BLACK | FOREGROUND_LIGHTGRAY);
+}
+
+
 void render_tui(edit_state_t* state) {
 	start_frame();
 
@@ -86,9 +96,7 @@ void render_tui(edit_state_t* state) {
 		if ((j >= start_line && j < start_line + viewport_height) && already_drawn <= viewport_height) {
 			if (!initial_line_drawn) {
 				initial_line_drawn = true;
-				memset(buff, 0, 512);
-				sprintf(buff, "%d.", current_line);
-				draw_string(0, cur_y, buff, BACKGROUND_BLACK | FOREGROUND_LIGHTGRAY);
+				draw_line_number(cur_y, current_line);
 			}
 
 			if (i == state->buffer_idx) {
@@ -97,6 +105,24 @@ void render_tui(edit_state_t* state) {
 				cursor_drawn = true;
 			}
 
+			if (state->input_buffer[i] == '\t') {
+				int col = cur_x - space_to_draw;
+				int next_tab_stop = ((col / TAB_WIDTH) + 1) * TAB_WIDTH;
+				int spaces = next_tab_stop - col;
+				
+				for (int s = 0; s < spaces; s++) {
+					if (cur_x >= width) {
+						cur_y++;
+						cur_x = space_to_draw;
+						already_drawn++;
+						draw_line_number(cur_y, current_line);
+					}
+					draw_char(cur_x, cur_y, state->show_tab_char ? '.' : ' ', BACKGROUND_BLACK | FOREGROUND_LIGHTGRAY);
+					cur_x++;
+				}
+				cur_x--;
+			}
+
 			if (state->input_buffer[i] >= 0x20 && state->input_buffer[i] <= 0x7E) {
 				draw_char(cur_x, cur_y, state->input_buffer[i], BACKGROUND_BLACK | (color ? color_translation[color[i]] : FOREGROUND_WHITE));
 			}
@@ -109,9 +135,7 @@ void render_tui(edit_state_t* state) {
 				j++;
 				cur_x = space_to_draw;
 				cur_y++;
-				memset(buff, 0, 512);
-				sprintf(buff, "%d.", current_line);
-				draw_string(0, cur_y, buff, BACKGROUND_BLACK | FOREGROUND_LIGHTGRAY);
+				draw_line_number(cur_y, current_line);
 			} else if (cur_x == width - 1) {
 				cur_y++;
 				cur_x = space_to_draw;