diff -r 000000000000 -r 7f656887cf89 plugins/consoles/rcons/server/win32/TextView.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/consoles/rcons/server/win32/TextView.cpp	Wed Jun 23 15:52:26 2010 +0100
@@ -0,0 +1,811 @@
+// TextView.cpp
+// 
+// Copyright (c) 2010 Accenture. All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+// 
+// Initial Contributors:
+// Accenture - Initial contribution
+//
+#include "Misc.h"
+#include "TextView.h"
+#include "Window.h"
+
+
+const int KCursorHeight = 2;
+
+
+CTextView* CTextView::New(CWindow& aWindow, CTextBuffer& aTextBuffer, int aWidthInChars, int aHeightInChars)
+	{
+	std::auto_ptr<CTextView> self(new(EThrow) CTextView(aWindow, aTextBuffer));
+	self->Construct(aWidthInChars, aHeightInChars);
+	return self.release();
+	}
+
+CTextView::~CTextView()
+	{
+	}
+
+CTextView::CTextView(CWindow& aWindow, CTextBuffer& aTextBuffer)
+	: iWindow(aWindow), iTextBuffer(aTextBuffer), iViewWidth(0), iViewHeight(0), iNumOverflowLines(aTextBuffer.NumOverflowLines()), iCursorEnabled(TRUE), iUpdating(FALSE), iCursorHidden(FALSE), iFocused(FALSE), iSelectionX1(-1), iSelectionY1(-1), iSelectionX2(-1), iSelectionY2(-1), iSelecting(FALSE), iDimmed(FALSE)
+	{
+	}
+
+void CTextView::Construct(int aWidthInChars, int aHeightInChars)
+	{
+	iFont = (HFONT)GetStockObject(ANSI_FIXED_FONT);
+	LOGFONT logFont;
+	if (GetObject(iFont, sizeof(LOGFONT), &logFont) == 0)
+		{
+		throw KExceptionConsoleWindowConstructFailed;
+		}
+
+	// ToDo - Figure out why logFont appears to be out by 1.
+	iCharWidth = 8;//logFont.lfWidth;
+	iCharHeight = 13;//logFont.lfHeight;
+	iViewWidth = aWidthInChars * iCharWidth;
+	iViewHeight = aHeightInChars * iCharHeight;
+
+	ResetBufferPos();
+	ConfigureScrollBars(TRUE);
+	iTextBuffer.SetObserver(this);
+	}
+
+void CTextView::EnableCursor()
+	{
+	if (!iCursorEnabled)
+		{
+		iCursorEnabled = TRUE;
+		SetCursorVisibility();
+		}
+	}
+
+void CTextView::DisableCursor()
+	{
+	if (iCursorEnabled)
+		{
+		iCursorEnabled = FALSE;
+		SetCursorVisibility();
+		}
+	}
+
+void CTextView::BeginUpdate()
+	{
+	ASSERT(!iUpdating);
+	iUpdating = TRUE;
+	SetCursorVisibility();
+	}
+
+void CTextView::EndUpdate()
+	{
+	ASSERT(iUpdating);
+	iUpdating = FALSE;
+	SetCursorVisibility();
+	}
+
+void CTextView::Draw() const
+	{
+	PAINTSTRUCT ps;
+	HDC hdc = BeginPaint(iWindow.Handle(), &ps);
+	HRGN undrawnRegion = CreateRectRgn(ps.rcPaint.left, ps.rcPaint.top, ps.rcPaint.right, ps.rcPaint.bottom);
+	--ps.rcPaint.right;
+	--ps.rcPaint.bottom;
+	SetMapMode(hdc, MM_TEXT);
+	HFONT oldFont = (HFONT)SelectObject(hdc, iFont);
+	int bufferWidth;
+	int bufferHeight;
+	iTextBuffer.GetSize(bufferWidth, bufferHeight);
+	int firstLineToDraw;
+	int lastLineToDraw;
+	GetVisibleLines(ps.rcPaint, firstLineToDraw, lastLineToDraw);
+	RECT selectionRect;
+	GetSelectionRect(selectionRect);
+
+	for (int i = firstLineToDraw; i <= lastLineToDraw; ++i)
+		{
+		RECT lineRect;
+		GetViewRect(0, i, bufferWidth, lineRect);
+		RECT selectionIntersection;
+		IntersectRect(&selectionIntersection, &selectionRect, &lineRect);
+		if (IsRectEmpty(&selectionIntersection))
+			{
+			COLORREF origTextColor;
+			if (iDimmed)
+				{
+				origTextColor = SetTextColor(hdc, GetSysColor(COLOR_GRAYTEXT));
+				}
+			TextOut(hdc, lineRect.left, lineRect.top, iTextBuffer.GetLine(i), bufferWidth);
+			if (iDimmed)
+				{
+				SetTextColor(hdc, origTextColor);
+				}
+			}
+		else
+			{
+			LPCTSTR lineText = iTextBuffer.GetLine(i);
+			RECT drawRect;
+			drawRect.left = lineRect.left;
+			drawRect.top = lineRect.top;
+			drawRect.right = selectionIntersection.left;
+			drawRect.bottom = selectionIntersection.bottom;
+			COLORREF origTextColor;
+			if (iDimmed)
+				{
+				origTextColor = SetTextColor(hdc, GetSysColor(COLOR_GRAYTEXT));
+				}
+			ExtTextOut(hdc, lineRect.left, lineRect.top, ETO_CLIPPED, &drawRect, lineText, bufferWidth, NULL);
+			if (iDimmed)
+				{
+				SetTextColor(hdc, origTextColor);
+				}
+			drawRect.left = drawRect.right;
+			drawRect.right = selectionIntersection.right;
+			origTextColor = SetTextColor(hdc, GetSysColor(COLOR_HIGHLIGHTTEXT));
+			COLORREF origBackgroundColor = SetBkColor(hdc, GetSysColor(COLOR_HIGHLIGHT));
+			ExtTextOut(hdc, lineRect.left, lineRect.top, ETO_CLIPPED, &drawRect, lineText, bufferWidth, NULL);
+			drawRect.left = drawRect.right;
+			drawRect.right = lineRect.right;
+			SetTextColor(hdc, origTextColor);
+			SetBkColor(hdc, origBackgroundColor);
+			if (iDimmed)
+				{
+				origTextColor = SetTextColor(hdc, GetSysColor(COLOR_GRAYTEXT));
+				}
+			ExtTextOut(hdc, lineRect.left, lineRect.top, ETO_CLIPPED, &drawRect, lineText, bufferWidth, NULL);
+			if (iDimmed)
+				{
+				SetTextColor(hdc, origTextColor);
+				}
+			}
+		HRGN lineRegion = CreateRectRgn(lineRect.left, lineRect.top, lineRect.right, lineRect.bottom);
+		CombineRgn(undrawnRegion, undrawnRegion, lineRegion, RGN_DIFF);
+		DeleteObject(lineRegion);
+		}
+
+	HBRUSH brush = CreateSolidBrush(GetSysColor(COLOR_WINDOW));
+	FillRgn(hdc, undrawnRegion, brush);
+	DeleteObject(brush);
+	DeleteObject(undrawnRegion);
+	SelectObject(hdc, oldFont);
+	EndPaint(iWindow.Handle(), &ps);
+	}
+
+void CTextView::HandleFocusGained()
+	{
+	iFocused = TRUE;
+	CreateCaret(iWindow.Handle(), (HBITMAP) NULL, iCharWidth, 2);
+	iCursorHidden = TRUE;
+	SetCursorPos();
+	SetCursorVisibility();
+	}
+
+void CTextView::HandleFocusLost()
+	{
+	iFocused = FALSE;
+	DestroyCaret();
+	}
+
+void CTextView::SetSize(int aWidth, int aHeight)
+	{
+	iViewWidth = aWidth;
+	iViewHeight = aHeight;
+	ResetBufferPos();
+	SetCursorPos();
+	ConfigureScrollBars(TRUE);
+	ReDraw();
+	}
+
+void CTextView::GetSize(int& aWidth, int& aHeight) const
+	{
+	aWidth = iViewWidth;
+	aHeight = iViewHeight;
+	}
+
+void CTextView::SetHorzScrollPosition(int aPosX)
+	{
+	int newBufferPosX;
+	int newBufferPosY;
+	MapScrollPosToBufPix(aPosX, 0, newBufferPosX, newBufferPosY);
+	int dX = newBufferPosX - iBufferPosX;
+	SetBufferPos(newBufferPosX, iBufferPosY);
+	SetCursorPos();
+	ScrollWindowEx(iWindow.Handle(), dX, 0, NULL, NULL, NULL, NULL, SW_INVALIDATE);
+	UpdateWindow(iWindow.Handle());
+	}
+
+void CTextView::SetVertScrollPosition(int aPosY)
+	{
+	int newBufferPosX;
+	int newBufferPosY;
+	MapScrollPosToBufPix(0, aPosY, newBufferPosX, newBufferPosY);
+	int dY = newBufferPosY - iBufferPosY;
+	SetBufferPos(iBufferPosX, newBufferPosY);
+	SetCursorPos();
+	ScrollWindowEx(iWindow.Handle(), 0, dY, NULL, NULL, NULL, NULL, SW_INVALIDATE);
+	UpdateWindow(iWindow.Handle());
+	}
+
+void CTextView::StartSelection(int aPosX, int aPosY)
+	{
+	ASSERT(!iSelecting);
+	iSelecting = TRUE;
+	RECT invalidRect;
+	GetSelectionRect(invalidRect);
+	if (!IsRectEmpty(&invalidRect))
+		{
+		InvalidateRect(iWindow.Handle(), &invalidRect, FALSE);
+		}
+	MapViewPixToBufPix(aPosX, aPosY, aPosX, aPosY);
+	MapBufPixToBufChar(aPosX, aPosY, iSelectionX1, iSelectionY1);
+	iSelectionX2 = iSelectionX1;
+	iSelectionY2 = iSelectionY1;
+	GetSelectionRect(invalidRect);
+	InvalidateRect(iWindow.Handle(), &invalidRect, FALSE);
+	UpdateWindow(iWindow.Handle());
+	}
+
+void CTextView::AdjustSelection(int aPosX, int aPosY)
+	{
+	if (iSelecting)
+		{
+		RECT previousSelectionRect;
+		GetSelectionRect(previousSelectionRect);
+		MapViewPixToBufPix(aPosX, aPosY, aPosX, aPosY);
+		MapBufPixToBufChar(aPosX, aPosY, iSelectionX2, iSelectionY2);
+		int bufferWidth;
+		int bufferHeight;
+		iTextBuffer.GetSize(bufferWidth, bufferHeight);
+		if (iSelectionX2 < 0)
+			{
+			iSelectionX2 = 0;
+			}
+		if (iSelectionX2 >= bufferWidth)
+			{
+			iSelectionX2 = bufferWidth - 1;
+			}
+		if (iSelectionY2 < -iNumOverflowLines)
+			{
+			iSelectionY2 = -iNumOverflowLines;
+			}
+		if (iSelectionY2 >= bufferHeight)
+			{
+			iSelectionY2 = bufferHeight - 1;
+			}
+		RECT newSelectionRect;
+		GetSelectionRect(newSelectionRect);
+
+		HRGN previousSelectionRegion = CreateRectRgn(previousSelectionRect.left, previousSelectionRect.top, previousSelectionRect.right, previousSelectionRect.bottom);
+		HRGN region = CreateRectRgn(newSelectionRect.left, newSelectionRect.top, newSelectionRect.right, newSelectionRect.bottom);
+		CombineRgn(region, region, previousSelectionRegion, RGN_XOR);
+		DeleteObject(previousSelectionRegion);
+
+		RECT regionBox;
+		if (GetRgnBox(region, &regionBox) != NULLREGION)
+			{
+			InvalidateRgn(iWindow.Handle(), region, FALSE);
+			UpdateWindow(iWindow.Handle());
+			}
+		DeleteObject(region);
+		}
+	}
+
+void CTextView::EndSelection(int aPosX, int aPosY)
+	{
+	if (iSelecting)
+		{
+		AdjustSelection(aPosX, aPosY);
+		}
+	iSelecting = FALSE;
+	}
+
+void CTextView::SelectWord(int aPosX, int aPosY)
+	{
+	iSelecting = FALSE;
+	RECT invalidRect;
+	GetSelectionRect(invalidRect);
+	if (!IsRectEmpty(&invalidRect))
+		{
+		InvalidateRect(iWindow.Handle(), &invalidRect, FALSE);
+		}
+
+	MapViewPixToBufPix(aPosX, aPosY, aPosX, aPosY);
+	MapBufPixToBufChar(aPosX, aPosY, iSelectionX1, iSelectionY1);
+	iSelectionX2 = iSelectionX1;
+	iSelectionY2 = iSelectionY1;
+	LPCTSTR linePtr = iTextBuffer.GetLine(iSelectionY1);
+
+	if (*(linePtr + iSelectionX1) != TCHAR(' '))
+		{
+		// Find the beginning of the word.
+		while ((*(linePtr + iSelectionX1) != TCHAR(' ')) && (iSelectionX1 > 0))
+			{
+			--iSelectionX1;
+			}
+		if (*(linePtr + iSelectionX1) == TCHAR(' '))
+			{
+			++iSelectionX1;
+			}
+		int bufferWidth;
+		int bufferHeight;
+		iTextBuffer.GetSize(bufferWidth, bufferHeight);
+
+		// Find the end of the word.
+		while ((*(linePtr + iSelectionX2) != TCHAR(' ')) && (iSelectionX2 < bufferWidth))
+			{
+			++iSelectionX2;
+			}
+		if (*(linePtr + iSelectionX2) == TCHAR(' '))
+			{
+			--iSelectionX2;
+			}
+		}
+
+	GetSelectionRect(invalidRect);
+	InvalidateRect(iWindow.Handle(), &invalidRect, FALSE);
+	}
+
+int CTextView::CharHeight() const
+	{
+	return iCharHeight;
+	}
+
+int CTextView::CharWidth() const
+	{
+	return iCharWidth;
+	}
+
+bool CTextView::SelectionAvailable() const
+	{
+	if (iSelectionX1 == -1)
+		{
+		ASSERT(iSelectionY1 == -1);
+		ASSERT(iSelectionX2 == -1);
+		ASSERT(iSelectionY2 == -1);
+		return FALSE;
+		}
+	return TRUE;
+	}
+
+LPTSTR CTextView::Selection() const
+	{
+	ASSERT(iSelectionX1 != -1);
+	ASSERT(iSelectionY1 != -1);
+	ASSERT(iSelectionX2 != -1);
+	ASSERT(iSelectionY2 != -1);
+	int tlX = min(iSelectionX1, iSelectionX2);
+	int tlY = min(iSelectionY1, iSelectionY2);
+	int brX = max(iSelectionX1, iSelectionX2);
+	int brY = max(iSelectionY1, iSelectionY2);
+	TCHAR* buf = new TCHAR[((brX - tlX + 3) * (brY - tlY + 1)) + 1];
+	if (buf)
+		{
+		TCHAR* bufPtr = buf;
+		for (int y = tlY; y <= brY; ++y)
+			{
+			LPCTSTR lineText = iTextBuffer.GetLine(y);
+			int x;
+			for (x = tlX; x <= brX; ++x)
+				{
+				*bufPtr++ = lineText[x];
+				}
+			while ((*(bufPtr - 1) == TCHAR(' ')) && (x > tlX))
+				{	// Remove trailing spaces from line.
+				--bufPtr;
+				--x;
+				}
+			if (y < brY)
+				{
+				*bufPtr++ = TCHAR('\r');
+				*bufPtr++ = TCHAR('\n');
+				}
+			}
+		*bufPtr = TCHAR('\0');
+		}
+	return buf;
+	}
+
+void CTextView::ClearSelection()
+	{
+	RECT invalidRect;
+	GetSelectionRect(invalidRect);
+	iSelectionX1 = iSelectionY1 = iSelectionX2 = iSelectionY2 = -1;
+	if (!IsRectEmpty(&invalidRect))
+		{
+		InvalidateRect(iWindow.Handle(), &invalidRect, FALSE);
+		UpdateWindow(iWindow.Handle());
+		}
+	}
+
+void CTextView::SetDimmed(bool aDimmed)
+	{
+	if (!aDimmed != !iDimmed)
+		{
+		iDimmed = aDimmed;
+		if (iDimmed)
+			{
+			DisableCursor();
+			}
+		else
+			{
+			EnableCursor();
+			}
+		iWindow.Redraw();
+		}
+	}
+
+void CTextView::HandleTextBufferChange(int aPosX, int aPosY, PTCHAR aPtr, int aLength)
+	{
+	RECT viewRect;
+	GetViewRect(aPosX, aPosY, aLength, viewRect);
+	RECT clientRect = {0, 0, iViewWidth, iViewHeight};
+	RECT intersection;
+	IntersectRect(&intersection, &clientRect, &viewRect);
+	if (!IsRectEmpty(&intersection))
+		{
+		InvalidateRect(iWindow.Handle(), &intersection, FALSE);
+		UpdateWindow(iWindow.Handle());
+		}
+	}
+
+void CTextView::HandleTextBufferScroll()
+	{
+	bool doScroll(FALSE);
+	ASSERT((iNumOverflowLines == iTextBuffer.NumOverflowLines()) || (iNumOverflowLines + 1 == iTextBuffer.NumOverflowLines()));
+	bool newOverflowLine(iNumOverflowLines != iTextBuffer.NumOverflowLines());
+	int moveBufferBy(0);
+
+	if (BottomLineVisible())
+		{
+		if (newOverflowLine)
+			{
+			moveBufferBy = -iCharHeight;
+			}
+		doScroll = TRUE;
+		}
+	else if (TopLineVisible() && !newOverflowLine)
+		{
+		doScroll = TRUE;
+		}
+	else if (!newOverflowLine)
+		{
+		moveBufferBy = iCharHeight;
+		}
+
+	if (newOverflowLine)
+		{
+		++iNumOverflowLines;
+		}
+
+	ScrollSelection();
+
+	if (moveBufferBy)
+		{
+		MoveBuffer(moveBufferBy);
+		}
+
+	if (doScroll)
+		{
+		ScrollWindowEx(iWindow.Handle(), 0, -iCharHeight, NULL, NULL, NULL, NULL, SW_INVALIDATE);
+		UpdateWindow(iWindow.Handle());
+		}
+
+	SetCursorPos();
+	ConfigureScrollBars(FALSE);
+	}
+
+void CTextView::HandleTextBufferCursorChange()
+	{
+	SetCursorPos();
+	}
+
+void CTextView::HandleTextBufferCleared()
+	{
+	iNumOverflowLines = 0;
+	ResetBufferPos();
+	ConfigureScrollBars(TRUE);
+	ReDraw();
+	}
+
+void CTextView::SetCursorVisibility()
+	{
+	if (iCursorEnabled && !iUpdating && CursorInView())
+		{
+		if (iCursorHidden)
+			{
+			ShowCaret(iWindow.Handle());
+			iCursorHidden = FALSE;
+			}
+		}
+	else if (!iCursorHidden)
+		{
+		HideCaret(iWindow.Handle());
+		iCursorHidden = TRUE;
+		}
+	}
+
+bool CTextView::CursorInView() const
+	{
+	int cursorX;
+	int cursorY;
+	GetCursorPixelPos(cursorX, cursorY);
+	RECT cursorRect = {cursorX, cursorY, cursorX + iCharWidth, cursorY + KCursorHeight};
+	return RectVisible(cursorRect);
+	}
+
+void CTextView::GetCursorPixelPos(int& aX, int& aY) const
+	{
+	iTextBuffer.GetCursorPos(aX, aY);
+	MapBufCharToBufPix(aX, aY, aX, aY);
+	aY += (iCharHeight - KCursorHeight);
+	MapBufPixToViewPix(aX, aY, aX, aY);
+	}
+
+void CTextView::SetCursorPos()
+	{
+	if (iFocused)
+		{
+		int cursorX;
+		int cursorY;
+		GetCursorPixelPos(cursorX, cursorY);
+		SetCaretPos(cursorX, cursorY);
+		}
+	}
+
+void CTextView::ResetBufferPos()
+	{
+	SetBufferPos(0, MinBufferPosY());
+	}
+
+void CTextView::SetBufferPos(int aPosX, int aPosY)
+	{
+	iBufferPosX = aPosX;
+	iBufferPosY = aPosY;
+	SetCursorVisibility();
+	}
+
+void CTextView::MoveBuffer(int aDiffY)
+	{
+	iBufferPosY += aDiffY;
+	ASSERT(iBufferPosY <= MaxBufferPosY());
+	int min = MinBufferPosY();
+	if (iBufferPosY < min)
+		{
+		iBufferPosY = min;
+		}
+	}
+
+void CTextView::ConfigureScrollBars(bool aReset)
+	{
+	int bufferWidth;
+	int bufferHeight;
+	iTextBuffer.GetSize(bufferWidth, bufferHeight);
+	bufferHeight += iNumOverflowLines;
+
+	int vertMax = (bufferHeight * iCharHeight) - 1;
+	int horzMax = (bufferWidth * iCharWidth) - 1;
+
+	SCROLLINFO scrollInfo;
+	scrollInfo.cbSize = sizeof(scrollInfo);
+	scrollInfo.fMask = SIF_RANGE | SIF_PAGE | SIF_POS;
+	scrollInfo.nMin = 0;
+	scrollInfo.nMax = vertMax;
+	scrollInfo.nPage = iViewHeight;
+	if (aReset)
+		{
+		scrollInfo.nPos = vertMax;
+		}
+	else
+		{
+		scrollInfo.nPos = -iBufferPosY;
+		}
+	SetScrollInfo(iWindow.Handle(), SB_VERT, &scrollInfo, TRUE);
+
+	scrollInfo.fMask = aReset ? SIF_RANGE | SIF_PAGE | SIF_POS : SIF_RANGE | SIF_PAGE;
+	scrollInfo.nMax = horzMax;
+	scrollInfo.nPage = iViewWidth;
+	if (aReset)
+		{
+		scrollInfo.nPos = 0;
+		}
+	SetScrollInfo(iWindow.Handle(), SB_HORZ, &scrollInfo, TRUE);
+	}
+
+void CTextView::ReDraw() const
+	{
+	InvalidateRect(iWindow.Handle(), NULL, FALSE);
+	}
+
+void CTextView::GetViewRect(int aCharPosX, int aCharPosY, int aNumChars, RECT& aRect) const
+	{
+	int x;
+	int y;
+	MapBufCharToBufPix(aCharPosX, aCharPosY, x, y);
+	MapBufPixToViewPix(x, y, x, y);
+	aRect.left = x;
+	aRect.top = y;
+	aRect.right = aRect.left + (aNumChars * iCharWidth);
+	aRect.bottom = aRect.top + iCharHeight;
+	}
+
+void CTextView::GetViewRect(int aCharPosX1, int aCharPosY1, int aCharPosX2, int aCharPosY2, RECT& aRect) const
+	{
+	int tlX = min(aCharPosX1, aCharPosX2);
+	int tlY = min(aCharPosY1, aCharPosY2);
+	int brX = max(aCharPosX1, aCharPosX2);
+	int brY = max(aCharPosY1, aCharPosY2);
+	MapBufCharToBufPix(tlX, tlY, tlX, tlY);
+	MapBufPixToViewPix(tlX, tlY, tlX, tlY);
+	MapBufCharToBufPix(brX, brY, brX, brY);
+	MapBufPixToViewPix(brX, brY, brX, brY);
+	brX += iCharWidth;
+	brY += iCharHeight;
+	aRect.left = tlX;
+	aRect.top = tlY;
+	aRect.right = brX;
+	aRect.bottom = brY;
+	}
+
+bool CTextView::RectVisible(const RECT& aRect) const
+	{
+	RECT clientRect = {0, 0, iViewWidth, iViewHeight};
+	RECT intersection;
+	IntersectRect(&intersection, &clientRect, &aRect);
+	return !IsRectEmpty(&intersection);
+	}
+
+bool CTextView::LineVisible(int aLinePos) const
+	{
+	int bufWidth;
+	int bufHeight;
+	iTextBuffer.GetSize(bufWidth, bufHeight);
+	RECT rect;
+	GetViewRect(0, aLinePos, bufWidth, rect);
+	return RectVisible(rect);
+	}
+
+bool CTextView::TopLineVisible() const
+	{
+	return LineVisible(-iNumOverflowLines);
+	}
+
+bool CTextView::BottomLineVisible() const
+	{
+	int bufWidth;
+	int bufHeight;
+	iTextBuffer.GetSize(bufWidth, bufHeight);
+	return LineVisible(bufHeight - 1);
+	}
+
+int CTextView::TotalBufferHeight() const
+	{
+	int bufferWidth;
+	int bufferHeight;
+	iTextBuffer.GetSize(bufferWidth, bufferHeight);
+	return (bufferHeight + iNumOverflowLines) * iCharHeight;
+	}
+
+int CTextView::MinBufferPosY() const
+	{
+	return iViewHeight - TotalBufferHeight();
+	}
+
+int CTextView::MaxBufferPosY() const
+	{
+	int minBufferPosY = MinBufferPosY();
+	if (minBufferPosY <= 0)
+		{
+		return 0;
+		}
+	return minBufferPosY;
+	}
+
+void CTextView::GetVisibleLines(const RECT& aRect, int& aFrom, int& aTo) const
+	{
+	int x;
+	int y;
+	MapViewPixToBufPix(aRect.left, aRect.top, x, y);
+	MapBufPixToBufChar(x, y, x, aFrom);
+	MapViewPixToBufPix(aRect.right, aRect.bottom, x, y);
+	MapBufPixToBufChar(x, y, x, aTo);
+	int bufWidth;
+	int bufHeight;
+	iTextBuffer.GetSize(bufWidth, bufHeight);
+	if (aFrom < -iNumOverflowLines)
+		{
+		aFrom = -iNumOverflowLines;
+		}
+	if (aFrom >= bufHeight)
+		{
+		aFrom = bufHeight - 1;
+		}
+	if (aTo >= bufHeight)
+		{
+		aTo = bufHeight - 1;
+		}
+	}
+
+void CTextView::MapBufCharToBufPix(int aBufCharPosX, int aBufCharPosY, int& aBufPixPosX, int& aBufPixPosY) const
+	{
+	aBufPixPosX = aBufCharPosX * iCharWidth;
+	aBufPixPosY = (iNumOverflowLines + aBufCharPosY) * iCharHeight;
+	}
+
+void CTextView::MapBufPixToViewPix(int aBufPixPosX, int aBufPixPosY, int& aViewPixPosX, int& aViewPixPosY) const
+	{
+	aViewPixPosX = aBufPixPosX + iBufferPosX;
+	aViewPixPosY = aBufPixPosY + iBufferPosY;
+	}
+
+void CTextView::MapBufPixToBufChar(int aBufPixPosX, int aBufPixPosY, int& aBufCharPosX, int& aBufCharPosY) const
+	{
+	aBufCharPosX = aBufPixPosX / iCharWidth;
+	aBufCharPosY = (aBufPixPosY / iCharHeight) - iNumOverflowLines;
+	}
+
+void CTextView::MapViewPixToBufPix(int aViewPixPosX, int aViewPixPosY, int& aBufPixPosX, int& aBufPixPosY) const
+	{
+	aBufPixPosX = aViewPixPosX - iBufferPosX;
+	aBufPixPosY = aViewPixPosY - iBufferPosY;
+	}
+
+void CTextView::MapScrollPosToBufPix(int aScrollPosX, int aScrollPosY, int& aBufPixPosX, int& aBufPixPosY) const
+	{
+	aBufPixPosX = -aScrollPosX;
+	aBufPixPosY = -aScrollPosY;
+	}
+
+void CTextView::GetSelectionRect(RECT& aRect) const
+	{
+	if (iSelectionX1 == -1)
+		{
+		ASSERT(iSelectionY1 == -1);
+		ASSERT(iSelectionX2 == -1);
+		ASSERT(iSelectionY2 == -1);
+		aRect.bottom = aRect.left = aRect.right = aRect.top = 0;
+		}
+	else
+		{
+		GetViewRect(iSelectionX1, iSelectionY1, iSelectionX2, iSelectionY2, aRect);
+		}
+	}
+
+void CTextView::ScrollSelection()
+	{
+	if (iSelectionX1 == -1)
+		{
+		ASSERT(iSelectionY1 == -1);
+		ASSERT(iSelectionX2 == -1);
+		ASSERT(iSelectionY2 == -1);
+		}
+	else
+		{
+		if ((iSelectionY1 == -iNumOverflowLines) && (iSelectionY2 == -iNumOverflowLines))
+			{
+			iSelectionX1 = iSelectionY1 = iSelectionX2 = iSelectionY2 = -1;
+			}
+		else
+			{
+			--iSelectionY1;
+			--iSelectionY2;
+			if (iSelectionY1 < -iNumOverflowLines)
+				{
+				iSelectionY1 = -iNumOverflowLines;
+				}
+			if (iSelectionY2 < -iNumOverflowLines)
+				{
+				iSelectionY2 = -iNumOverflowLines;
+				}
+			}
+		}
+	}
+
+void CTextView::ScrollToEndIfNeeded()
+	{
+	if (!BottomLineVisible())
+		{
+		SetVertScrollPosition(TotalBufferHeight()-iViewHeight);
+		ConfigureScrollBars(FALSE);
+		}
+	}