[aandrejevic] 60955: [NTVDM] Implement vertical scrolling in BiosScrollWindow.

Author: aandrejevic
Date: Mon Nov 11 20:41:55 2013
New Revision: 60955

URL: http://svn.reactos.org/svn/reactos?rev=60955&view=rev
Log:
[NTVDM]
Implement vertical scrolling in BiosScrollWindow.

Modified:
    branches/ntvdm/subsystems/ntvdm/bios.c

Modified: branches/ntvdm/subsystems/ntvdm/bios.c
URL: http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/bios.c?re...
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/bios.c	[iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/bios.c	[iso-8859-1] Mon Nov 11 20:41:55 2013
@@ -651,8 +651,9 @@
 {
     DWORD i;
     LPWORD WindowData;
-    DWORD WindowSize = (Rectangle.Bottom - Rectangle.Top + 1)
-                       * (Rectangle.Right - Rectangle.Left + 1);
+    WORD WindowWidth = Rectangle.Right - Rectangle.Left + 1;
+    WORD WindowHeight = Rectangle.Bottom - Rectangle.Top + 1;
+    DWORD WindowSize = WindowWidth * WindowHeight;

/* Allocate a buffer for the window */
     WindowData = (LPWORD)HeapAlloc(GetProcessHeap(),
@@ -663,7 +664,13 @@
     /* Read the window data */
     BiosReadWindow(WindowData, Rectangle, Page);

-    if (Amount == 0)
+    if ((Amount == 0)
+        || (((Direction == SCROLL_DIRECTION_UP)
+        || (Direction == SCROLL_DIRECTION_DOWN))
+        && (Amount >= WindowHeight))
+        || (((Direction == SCROLL_DIRECTION_LEFT)
+        || (Direction == SCROLL_DIRECTION_RIGHT))
+        && (Amount >= WindowWidth)))
     {
         /* Fill the window */
         for (i = 0; i < WindowSize; i++)
@@ -674,7 +681,42 @@
         goto Done;
     }

-    // TODO: Scroll the window!
+    switch (Direction)
+    {
+        case SCROLL_DIRECTION_UP:
+        {
+            RtlMoveMemory(WindowData,
+                          &WindowData[WindowWidth * Amount],
+                          (WindowSize - WindowWidth * Amount) * sizeof(WORD));
+
+            for (i = 0; i < Amount * WindowWidth; i++)
+            {
+                WindowData[WindowSize - i - 1] = MAKEWORD(' ', FillAttribute);
+            }
+
+            break;
+        }
+
+        case SCROLL_DIRECTION_DOWN:
+        {
+            RtlMoveMemory(&WindowData[WindowWidth * Amount],
+                          WindowData,
+                          (WindowSize - WindowWidth * Amount) * sizeof(WORD));
+
+            for (i = 0; i < Amount * WindowWidth; i++)
+            {
+                WindowData[i] = MAKEWORD(' ', FillAttribute);
+            }
+
+            break;
+        }
+
+        default:
+        {
+            // TODO: NOT IMPLEMENTED!
+            UNIMPLEMENTED;
+        }
+    }

Done:
     /* Write back the window data */