From 8a867fdf503d26e151bcc084a7147ba0f62271b0 Mon Sep 17 00:00:00 2001
From: John Hodge <tpg@portege.thepowersgang.com>
Date: Tue, 22 Sep 2009 11:49:28 +0800
Subject: [PATCH] Added cursor manipulation to vterm & vga

---
 Kernel/drv/vga.c               | 31 +++++++++++++++++++++++++++----
 Kernel/drv/vterm.c             | 14 ++++++++++++++
 Kernel/include/tpl_drv_video.h |  7 +++++++
 3 files changed, 48 insertions(+), 4 deletions(-)

diff --git a/Kernel/drv/vga.c b/Kernel/drv/vga.c
index 93f44f07..015423de 100644
--- a/Kernel/drv/vga.c
+++ b/Kernel/drv/vga.c
@@ -6,11 +6,16 @@
 #include <tpl_drv_video.h>
 #include <modules.h>
 
+// === CONSTANTS ===
+#define	VGA_WIDTH	80
+#define	VGA_HEIGHT	25
+
 // === PROTOTYPES ===
  int	VGA_Install(char **Arguments);
 Uint64	VGA_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  int	VGA_IOCtl(tVFS_Node *Node, int Id, void *Data);
 Uint16	VGA_int_GetWord(tVT_Char *Char);
+void	VGA_int_SetCursor(Sint16 x, Sint16 y);
 
 // === GLOBALS ===
 MODULE_DEFINE(0, 0x000A, VGA, VGA_Install, NULL, NULL);
@@ -18,7 +23,7 @@ tDevFS_Driver	gVGA_DevInfo = {
 	NULL, "VGA",
 	{
 	.NumACLs = 0,
-	.Size = 80*25*sizeof(tVT_Char),
+	.Size = VGA_WIDTH*VGA_HEIGHT*sizeof(tVT_Char),
 	//.Read = VGA_Read,
 	.Write = VGA_Write,
 	.IOCtl = VGA_IOCtl
@@ -85,15 +90,18 @@ int VGA_IOCtl(tVFS_Node *Node, int Id, void *Data)
 	case DRV_IOCTL_VERSION:	*(int*)Data = 50;	return 1;
 	case DRV_IOCTL_LOOKUP:	return 0;
 	
-	case VIDEO_IOCTL_SETMODE:	return 0;	// Ignored (Text Only ATM)
 	case VIDEO_IOCTL_GETMODE:	return 0;	// Mode 0 only
+	case VIDEO_IOCTL_SETMODE:	return 0;	// Ignored (Text Only ATM)
 	case VIDEO_IOCTL_FINDMODE:	return 0;	// Text Only!
 	case VIDEO_IOCTL_MODEINFO:
 		if( ((tVideo_IOCtl_Mode*)Data)->id != 0)	return 0;
-		((tVideo_IOCtl_Mode*)Data)->width = 80;
-		((tVideo_IOCtl_Mode*)Data)->height = 25;
+		((tVideo_IOCtl_Mode*)Data)->width = VGA_WIDTH;
+		((tVideo_IOCtl_Mode*)Data)->height = VGA_HEIGHT;
 		((tVideo_IOCtl_Mode*)Data)->bpp = 4;
 		return 1;
+	case VIDEO_IOCTL_SETCURSOR:
+		VGA_int_SetCursor( ((tVideo_IOCtl_Pos*)Data)->x, ((tVideo_IOCtl_Pos*)Data)->y );
+		return 1;
 	}
 	return 0;
 }
@@ -172,3 +180,18 @@ Uint16 VGA_int_GetWord(tVT_Char *Char)
 	
 	return ret;
 }
+
+/**
+ * \fn void VGA_int_SetCursor(Sint16 x, Sint16 y)
+ * \brief Updates the cursor position
+ */
+void VGA_int_SetCursor(Sint16 x, Sint16 y)
+{
+	 int	pos = x+y*VGA_WIDTH;
+	if(x == -1 || y == -1)
+		pos = -1;
+    outb(0x3D4, 14);
+    outb(0x3D5, pos >> 8);
+    outb(0x3D4, 15);
+    outb(0x3D5, pos);
+}
diff --git a/Kernel/drv/vterm.c b/Kernel/drv/vterm.c
index bd50cd95..8aa7321b 100644
--- a/Kernel/drv/vterm.c
+++ b/Kernel/drv/vterm.c
@@ -17,6 +17,8 @@
 #define	DEFAULT_HEIGHT	25
 #define	DEFAULT_COLOUR	(VT_COL_BLACK|(VT_COL_WHITE<<16))
 
+#define	VT_FLAG_HIDECSR	0x01
+
 enum eVT_Modes {
 	VT_MODE_TEXT8,	// UTF-8 Text Mode (VT100 Emulation)
 	VT_MODE_TEXT32,	// UTF-32 Text Mode (Acess Native)
@@ -30,6 +32,7 @@ enum eVT_Modes {
 // === TYPES ===
 typedef struct {
 	 int	Mode;
+	 int	Flags;
 	 int	Width, Height;
 	 int	ViewPos, WritePos;
 	Uint32	CurColour;
@@ -134,6 +137,7 @@ int VT_Install(char **Arguments)
 	for( i = 0; i < NUM_VTS; i++ )
 	{
 		gVT_Terminals[i].Mode = VT_MODE_TEXT8;
+		gVT_Terminals[i].Flags = 0;
 		gVT_Terminals[i].Width = DEFAULT_WIDTH;
 		gVT_Terminals[i].Height = DEFAULT_HEIGHT;
 		gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
@@ -283,6 +287,7 @@ Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 		//VT_int_PutString32(term, Buffer, Length);
 		break;
 	}
+	
 	//LEAVE('i', 0);
 	return 0;
 }
@@ -336,6 +341,15 @@ void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 			VT_int_PutChar(Term, val);
 		}
 	}
+	
+	// Update cursor
+	if(Term->Flags & VT_FLAG_HIDECSR)
+	{
+		tVideo_IOCtl_Pos	pos;
+		pos.x = Term->WritePos % Term->Width;
+		pos.y = Term->WritePos / Term->Width;
+		VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
+	}
 }
 
 /**
diff --git a/Kernel/include/tpl_drv_video.h b/Kernel/include/tpl_drv_video.h
index 23d3907a..8f22c97d 100644
--- a/Kernel/include/tpl_drv_video.h
+++ b/Kernel/include/tpl_drv_video.h
@@ -37,6 +37,8 @@ enum eTplVideo_IOCtl {
 	VIDEO_IOCTL_FINDMODE,
 	//! \brief Get mode info - (tVideo_IOCtl_Mode *info)
 	VIDEO_IOCTL_MODEINFO,
+	//! \brief Sets the cursor position (tVideo_IOCtl_Pos *pos)
+	VIDEO_IOCTL_SETCURSOR,
 	//! \brief Request access to Framebuffer - (void *dest), Return Boolean Success
 	VIDEO_IOCTL_REQLFB
 };
@@ -51,7 +53,12 @@ struct sVideo_IOCtl_Mode {
 	Uint16	height;	//!< Height
 	Uint16	bpp;	//!< Bits per Pixel
 };
+struct sVideo_IOCtl_Pos {
+	Sint16	x;
+	Sint16	y;
+};
 typedef struct sVideo_IOCtl_Mode	tVideo_IOCtl_Mode;	//!< Mode Type
+typedef struct sVideo_IOCtl_Pos	tVideo_IOCtl_Pos;	//!< Mode Type
 
 /**
  * \struct sVT_Char
-- 
2.20.1