Resolve enter and backspace in insert mode

main.cpp

@@ -10,6 +10,8 @@ using std::string;
 using std::vector;
 
 #define ESC 27
+#define ENTER 10
+#define BS 127
 #define adds(s) addstr(s.c_str())
 enum mode_type { insert, normal };
 
@@ -25,7 +27,7 @@ char get(int r, int s) { return get_line(file_offset+r)[s]; }
 void set(int r, int s, char ch) { file.find(file_offset+r)->text[s] = ch; }
 void add_line(int r, string text = "") { file.insert(file_offset+r, text); }
 void insert_char(int r, int s, char ch) { file.find(file_offset+r)->text.insert(s, string{ch}); }
-void remove_char(int r, int s) { file.find(file_offset+r)->text.erase(s,1); }
+void remove_char(int r, int s, int len=1) { file.find(file_offset+r)->text.erase(s,len); }
 void remove_line(int r) { file.remove(file_offset+r); }
 
 
@@ -45,8 +47,9 @@ bool save(string filename) {
 	std::ofstream outfile(filename);
 	if(!outfile.good())
 		return 1;
+
 	for(int i = 0; i < file.size(); ++i)
-		outfile << get_line(i) << std::endl;
+		outfile << get_line(i-file_offset) << std::endl;
 	return 0;
 }
 
@@ -70,6 +73,13 @@ void print_file(int start = 0) {
 		else
 			clear_line(i);
 }
+// Splitting lines
+string split_line(int r, int s) {
+	string line = get_line(r);
+	string ret = line.substr(s, line.size());
+	remove_char(r, s, line.size()-s);
+	return ret;
+}
 
 
 // TODO skoky a přesuny
@@ -127,10 +137,6 @@ void move_cursor(char ch) {
 
 int main(int argc, char* argv[]) {
 	
-	// Init
-	initscr();
-	refresh();
-
 	// Check valid filename and load
 	if(argc <= 1)
 		return 1;
@@ -138,6 +144,9 @@ int main(int argc, char* argv[]) {
 	if(load(filename))
 		return 1;
 
+	// Init
+	initscr();
+	refresh();
 	print_file();
 
 	mode_type mode = normal;
@@ -183,6 +192,17 @@ int main(int argc, char* argv[]) {
 				switch(ch) {
 					case ESC:
 						mode = normal;
+						print_line(row);
+						break;
+					case BS:
+						if(col>0)
+							remove_char(row, --col);
+						print_line(row);
+						break;
+					case ENTER:
+						add_line(row+1, split_line(row, col));
+						print_file(row++);
+						jump_line_end();
 						break;
 					default:
 						insert_char(row, col++, ch);