progress on drawing the screen

src/draw.c

@@ -12,8 +12,28 @@ extern screen_buffer_t screen_buffer;
 
 void refresh_screen(void)
 {
+	/**
+	 * TODO: need to move the cursor back at the end
+	 * also need to draw the cusor coords at the bottom
+	 * and need to implement controls
+	 */
+
+	int cur_x, cur_y;
+
+	cur_x = editor.cx;
+	cur_y = editor.cy;
+
+	// hide the cursor to prevent flickering
+	screen_buffer_append(&screen_buffer, HIDE_CURSOR_STR, HIDE_CURSOR_STR_LEN);
+
+	screen_buffer_append(&screen_buffer, MOVE_CURSOR_HOME_STR, MOVE_CURSOR_HOME_STR_LEN);
+
+	screen_buffer_append(&screen_buffer, CLEAR_SCREEN_STR, CLEAR_SCREEN_STR_LEN);
+
 	draw_editor_rows();
 
+	screen_buffer_append(&screen_buffer, SHOW_CURSOR_STR, SHOW_CURSOR_STR_LEN);
+
 	write(STDOUT_FILENO, screen_buffer.text, screen_buffer.len);			
 }
 

src/draw.h

@@ -1,6 +1,21 @@
 #ifndef DRAW_H
 #define DRAW_H
 
+/** BEGIN ASCII ESCAPE STRINGS **/
+
+#define CLEAR_SCREEN_STR "\e[2J"
+#define CLEAR_SCREEN_STR_LEN 4
+
+#define MOVE_CURSOR_HOME_STR "\e[H"
+#define MOVE_CURSOR_HOME_STR_LEN 3
+
+#define HIDE_CURSOR_STR "\e[?25l"
+#define HIDE_CURSOR_STR_LEN 6
+#define SHOW_CURSOR_STR "\e[?25h"
+#define SHOW_CURSOR_STR_LEN 6
+
+/** END ASCII ESCAPE STRINGS SECTION **/
+
 void refresh_screen(void);
 
 void draw_editor_rows(void);