public int CompareTo(DiffViewPosition Pos)
{
int iResult = Line - Pos.Line;
if (iResult == 0)
{
iResult = Column - Pos.Column;
}
return iResult;
}
private void UpdateAfterSetData()
{
//Reset the position before we start calculating things
m_Position = new DiffViewPosition(0, 0);
m_SelectionStart = DiffViewPosition.Empty;
//We have to call this to recalc the gutter width
UpdateTextMetrics(false);
//We have to call this to setup the scroll bars
SetupScrollBars();
//Reset the scroll position
VScrollPos = 0;
HScrollPos = 0;
//Update the caret
UpdateCaret();
//Force a repaint
Invalidate();
//Fire the LinesChanged event
if (LinesChanged != null)
{
LinesChanged(this, EventArgs.Empty);
}
//Fire the position changed event
if (PositionChanged != null)
{
PositionChanged(this, EventArgs.Empty);
}
FireSelectionChanged();
}
public DiffView()
{
//Set some important control styles
SetStyle(ControlStyles.Opaque, true);
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
SetStyle(ControlStyles.UserPaint, true);
SetStyle(ControlStyles.DoubleBuffer, true);
SetStyle(ControlStyles.Selectable, true);
SetStyle(ControlStyles.StandardClick, true);
SetStyle(ControlStyles.StandardDoubleClick, true);
SetStyle(ControlStyles.ResizeRedraw, true);
m_Position = new DiffViewPosition(0, 0);
UpdateTextMetrics(true);
m_AutoScrollTimer = new Timer();
m_AutoScrollTimer.Enabled = false;
m_AutoScrollTimer.Interval = 100;
m_AutoScrollTimer.Tick += new EventHandler(AutoScrollTimer_Tick);
m_OptionsChangedHandler = new EventHandler(DiffOptionsChanged);
DiffOptions.OptionsChanged += m_OptionsChangedHandler;
Cursor = Cursors.IBeam;
}
private void SetSelectionEnd(int iLine, int iColumn)
{
bool bSelectionChanged = false;
if (!HasSelection)
{
m_SelectionStart = m_Position;
bSelectionChanged = true;
}
//Move the Position but keep the selection start
int iOriginalLine = m_Position.Line;
SetPosition(iLine, iColumn, false, true);
int iNumLines = Math.Abs(iLine - iOriginalLine);
//Invalidate new selection
int iFirstLine = Math.Min(iOriginalLine, iLine);
Point Pt = GetPointFromPos(iFirstLine, 0);
Rectangle R = new Rectangle(GutterWidth, Pt.Y, ClientSize.Width, (iNumLines + 1) * LineHeight);
Invalidate(R);
if (bSelectionChanged)
{
FireSelectionChanged();
}
}
private void SetPosition(int iLine, int iColumn, bool bClearSelection, bool bScrollToCaret)
{
if (iLine >= LineCount) iLine = LineCount - 1;
if (iLine < 0) iLine = 0;
int iLength = GetLineLength(iLine);
if (iColumn > iLength) iColumn = iLength;
if (iColumn < 0) iColumn = 0;
if (bClearSelection)
{
ClearSelection();
}
bool bLineNumberChanged = m_Position.Line != iLine;
bool bColumnNumberChanged = m_Position.Column != iColumn;
if (bLineNumberChanged || bColumnNumberChanged)
{
//Invalidate the old gutter line.
if (bLineNumberChanged) InvalidateCaretGutter();
m_Position = new DiffViewPosition(iLine, iColumn);
//Invalidate the new gutter line.
if (bLineNumberChanged) InvalidateCaretGutter();
UpdateCaret();
//If the selection range is now empty, then clear the selection.
if (m_Position == m_SelectionStart)
{
ClearSelection();
//Set the flag so we don't refire the SelectionChanged event below.
bClearSelection = true;
}
if (m_Lines != null)
{
if (PositionChanged != null)
{
PositionChanged(this, EventArgs.Empty);
}
//If we cleared the selection earlier, then that
//fire a SelectionChanged event. If not, then we
//need to fire it now because we've changed the
//selection end point.
if (!bClearSelection)
{
FireSelectionChanged();
}
}
}
if (bScrollToCaret)
{
ScrollToCaret();
}
}
private bool InSelection(DiffViewPosition Pos)
{
bool bResult = false;
if (HasSelection)
{
DiffViewPosition StartSel, EndSel;
GetForwardOrderSelection(out StartSel, out EndSel);
bResult = (Pos >= StartSel && Pos <= EndSel);
}
return bResult;
}
private void GetForwardOrderSelection(out DiffViewPosition StartSel, out DiffViewPosition EndSel)
{
//Determine the selection positions in forward order.
//Get them in order in case we have a reverse selection.
StartSel = m_SelectionStart;
EndSel = m_Position;
if (StartSel.Line > EndSel.Line || (StartSel.Line == EndSel.Line && StartSel.Column > EndSel.Column))
{
StartSel = m_Position;
EndSel = m_SelectionStart;
}
}
private void ClearSelection()
{
if (HasSelection)
{
InvalidateSelection();
m_SelectionStart = DiffViewPosition.Empty;
FireSelectionChanged();
}
}