added: implementation of cursor

src/cursor.h

@@ -4,6 +4,31 @@
 #include <ncurses.h>
 #include "position.h"
 
+/* Attributes
+    A_NORMAL        Normal display (no highlight)
+    A_STANDOUT      Best highlighting mode of the terminal.
+    A_UNDERLINE     Underlining
+    A_REVERSE       Reverse video
+    A_BLINK         Blinking
+    A_DIM           Half bright
+    A_BOLD          Extra bright or bold
+    A_PROTECT       Protected mode
+    A_INVIS         Invisible or blank mode
+    A_ALTCHARSET    Alternate character set
+    A_CHARTEXT      Bit-mask to extract a character
+    COLOR_PAIR(n)   Color-pair number n
+
+   Color pair numbers
+    COLOR_BLACK   0
+    COLOR_RED     1
+    COLOR_GREEN   2
+    COLOR_YELLOW  3
+    COLOR_BLUE    4
+    COLOR_MAGENTA 5
+    COLOR_CYAN    6
+    COLOR_WHITE   7
+ */
+
 // IMPORTANT: use unique_ptr for cursor because:
 //  1. Every instance of cursor will initialize a new ncurses screen
 //     Hence you should only have one instance of cursor at a time
@@ -20,9 +45,9 @@ public:
 
         void show() const;
 
-        void print_char(const position &pos, const char ch) const;
+        void print_char(const position &pos, const char ch, const int attrs) const;
 
-        void print_str(const position &head, const std::string str) const;
+        void print_str(const position &head, const std::string str, const int attrs) const;
 };
 
 // IMPORTANT: this will fail when terminal size changes