added display and its subclasses

src/console_output.cc

@@ -80,7 +80,8 @@ void console_output::render() {
 }
 
 void console_output::clear() {
-
+        contents.clear();
+        contents.reserve(DISPLAY_BUFFER_SIZE);
 }
 
 void console_output::print_char(const position &pos, const char ch,

src/curses_output.cc

@@ -0,0 +1,22 @@
+#include "curses_output.h"
+
+curses_output::curses_output(std::unique_ptr<cursor> &new_curse):
+        curse{new_curse} {}
+
+void curses_output::render() {
+        curse->show();
+}
+
+void curses_output::clear() {
+        curse->clear();
+}
+
+void curses_output::print_char(const position &pos, const char ch,
+                               const int attr) {
+        curse->print_char(pos, ch, attr);
+}
+
+void curses_output::print_str(const position &pos, const std::string &str,
+                              const int attr) {
+        curse->print_str(pos, str, attr);
+}

src/curses_output.h

@@ -0,0 +1,23 @@
+#ifndef __CURSES_OUTPUT_H__
+#define __CURSES_OUTPUT_H__
+
+#include <utility>
+#include <memory>
+#include "cursor.h"
+#include "display.h"
+
+class curses_output final : public display {
+private:
+        std::unique_ptr<cursor> &curse;
+public:
+        curses_output(std::unique_ptr<cursor> &new_curse);
+
+        void render() override;
+        void clear() override;
+        void print_char(const position &pos,
+                        const char ch, const int attr) override;
+        void print_str(const position &pos,
+                       const std::string &str, const int attr) override;
+};
+
+#endif

src/cursor.cc

@@ -17,6 +17,10 @@ void cursor::show() const {
         refresh();
 }
 
+void cursor::clear() const {
+        ::clear();
+}
+
 void cursor::print_char(const position &pos, const char ch,
                         const int attrs) const {
         attrset(attrs);

src/cursor.h

@@ -45,6 +45,8 @@ public:
 
         void show() const;
 
+        void clear() const ;
+
         void print_char(const position &pos, const char ch, const int attrs) const;
 
         void print_str(const position &head, const std::string str,

src/file_output.cc

@@ -1,14 +1,24 @@
 #include "file_output.h"
 
+#include <utility>
+
+file_output::file_output(std::ofstream &&new_out):
+        out{std::move(new_out)} {}
+
 void file_output::render() {
         for (std::size_t idx = 0; idx < contents.size(); ++idx) {
                 if (idx % DISPLAY_WIDTH == 0 && idx)
                         out << std::endl;
 
-                out << (char)contents[idx];
+                out << (char)(contents[idx] ? contents[idx] : ' ');
         }
 }
 
+void file_output::clear() {
+        contents.clear();
+        contents.reserve(DISPLAY_BUFFER_SIZE);
+}
+
 void file_output::print_char(const position &pos, const char ch,
                              const int attr) {
         if (pos.x >= DISPLAY_WIDTH || pos.y >= DISPLAY_HEIGHT)