retains cursor position, adds a move cursor function

src/draw.c

@@ -1,8 +1,12 @@
+#include <stdio.h>
+#include <string.h>
 #include <unistd.h>
 
 #include "draw.h"
 #include "term.h"
 
+#define MAX_LEN 256
+
 /** BEGIN extern section **/
 
 extern editor_t editor;
@@ -17,8 +21,9 @@ void refresh_screen(void)
 	 * also need to draw the cusor coords at the bottom
 	 * and need to implement controls
 	 */
-
+	
 	int cur_x, cur_y;
+	char* move_cursor;
 
 	cur_x = editor.cx;
 	cur_y = editor.cy;
@@ -32,6 +37,10 @@ void refresh_screen(void)
 
 	draw_editor_rows();
 
+	move_cursor_pos(&move_cursor, cur_x, cur_y);
+	screen_buffer_append(&screen_buffer, move_cursor, strlen(move_cursor));
+	free(move_cursor);
+
 	screen_buffer_append(&screen_buffer, SHOW_CURSOR_STR, SHOW_CURSOR_STR_LEN);
 
 	write(STDOUT_FILENO, screen_buffer.text, screen_buffer.len);			
@@ -43,3 +52,12 @@ void draw_editor_rows(void)
 	for (i = 0; i < editor.rows - 1; i++)
 		screen_buffer_append(&screen_buffer, "~\r\n", 3);
 }
+
+
+void move_cursor_pos(char** out, int x, int y)
+{
+	*out = malloc(sizeof(char) * MAX_LEN);
+	snprintf(*out, MAX_LEN, "\e[%d;%dH", x, y);
+}
+
+#undef MAX_LEN

src/draw.h

@@ -20,4 +20,16 @@ void refresh_screen(void);
 
 void draw_editor_rows(void);
 
+/**
+ * # move_cursor_pos
+ *
+ * - char** out - pointer to char* which will be malloc'd and have the formatted string placed into
+ * - int x - x pos
+ * - int y - y pos
+ *
+ * out must be free'd
+ */
+void move_cursor_pos(char** out, int x, int y);
+
+
 #endif

src/main.c

@@ -1,3 +1,4 @@
+#include <stdio.h>
 #include <unistd.h>
 
 #include "draw.h"
@@ -9,6 +10,7 @@ screen_buffer_t screen_buffer;
 int main(void)
 {
 	char c;
+	char* in;
 
 	setup_terminal();
 
@@ -21,7 +23,5 @@ int main(void)
 		refresh_screen();
 	}
 
-	kill_application();
-
 	return EXIT_SUCCESS;
 }

src/term.c

@@ -107,6 +107,9 @@ void setup_terminal(void)
 		exit(EXIT_FAILURE);
 	}
 
+	editor.cx = 0;
+	editor.cy = 0;
+
 	editor.cols = win.ws_col;
 	editor.rows = win.ws_row;
 }