From c6d3d9e1dedd6012ee3f737843237e33e6534d1e Mon Sep 17 00:00:00 2001
From: Morten Delenk <morten@dark32.cf>
Date: Mon, 24 Apr 2017 08:21:44 +0000
Subject: [PATCH] added an actual Kobject and a tty driver

---
 kernel/src/include/kobject.hpp | 29 ++++++++++++++++++++++++++++-
 kernel/src/include/tty.hpp     |  3 ++-
 kernel/src/tty.cpp             | 25 ++++++++++++++++++++++++-
 3 files changed, 54 insertions(+), 3 deletions(-)

diff --git a/kernel/src/include/kobject.hpp b/kernel/src/include/kobject.hpp
index 0a13c19..5c14d5d 100644
--- a/kernel/src/include/kobject.hpp
+++ b/kernel/src/include/kobject.hpp
@@ -2,8 +2,9 @@
 enum class kobjectType {
     POINTER, //Pointer to non-object
     KOBJECT, //garbage collected kobject
+    TTY,
 };
-class Kobject {
+class Kref {
     public:
         kobjectType type;
         void *ptr;
@@ -46,3 +47,29 @@ class Kobject {
             return *this;
         }
 };
+class Kobject {
+    public:
+        KobjectType type;
+        unsigned int refctr;
+        Kobject(KobjectType type):type(type),refctr(1) {}
+        virtual ~Kobject() {
+            refctr=0;
+        }
+        virtual auto operator++() -> Kobject & {
+            unsigned int tmp=refctr;
+            refctr++;
+            if(refctr < tmp) {
+                //TODO panic("Refcounter overflow");
+                for(;;);
+            }
+            return *this;
+        }
+        virtual auto operator--() -> Kobject & {
+            refctr--;
+            if(refctr == 0) {
+                //TODO delete this;
+                return *((Kobject*)nullptr);
+            }
+            return *this;
+        }
+}
diff --git a/kernel/src/include/tty.hpp b/kernel/src/include/tty.hpp
index f76a0a5..769b96c 100644
--- a/kernel/src/include/tty.hpp
+++ b/kernel/src/include/tty.hpp
@@ -1,4 +1,5 @@
 #pragma once
+#include <kobject.h>
 enum Color {
     BLACK,
     BLUE,
@@ -17,7 +18,7 @@ enum Color {
     YELLOW,
     WHITE
 };
-class TTY {
+class TTY: public Kobject {
 protected:
     int x;
     int y;
diff --git a/kernel/src/tty.cpp b/kernel/src/tty.cpp
index 05d2c67..b0d1110 100644
--- a/kernel/src/tty.cpp
+++ b/kernel/src/tty.cpp
@@ -1,5 +1,5 @@
 #include <tty.hpp>
-TTY::TTY(int width, int height): x(0), y(0), width(width), height(height), curColor(WHITE), rgbColor(0xFFFFFF), useRGB(false) {}
+TTY::TTY(int width, int height): x(0), y(0), width(width), height(height), curColor(WHITE), rgbColor(0xFFFFFF), useRGB(false), Kobject(KobjectType::TTY) {}
 TTY::~TTY() {}
 auto TTY::plotChar(int x, int y, int c) -> void {}
 auto TTY::rgbSupport() -> bool {return true;}
@@ -11,6 +11,29 @@ auto TTY::setColor(unsigned int c) -> void {
     rgbColor = c;
     useRGB=true;
 }
+auto TTY::putChar(int c) -> void {
+    auto scroll = [this]()->void {
+        for(int x=0;x<this->width;x++)
+            for(int y=0;y<this->height;y++)
+               this->plotChar(x,y,0);
+        this->x=this->y=0;
+    };
+    switch(c) {
+        case '\n':
+            x=0;
+            y++;
+            if(y>=height)
+                scroll();
+            break;
+        default:
+            plotChar(x,y,c);
+            x++;
+            if(x>width)
+                y++;
+            if(y>=height)
+                scroll();
+    }
+}
 auto TTY::puts(const char *str) -> void {
     for(int i=0;str[i];i++) {
         //Decode UTF-8