public bool GoToLine()
{
int maxLineNumber = 0;
if (this.lines != null)
{
for (int i = this.lines.Count - 1; i >= 0; i--)
{
DiffViewLine line = this.lines[i];
if (line.Number.HasValue)
{
// Add 1 because display numbers are 1-based.
maxLineNumber = line.Number.Value + 1;
break;
}
}
}
bool result = false;
if (maxLineNumber > 0)
{
using (GoToDialog dialog = new())
{
if (dialog.Execute(this, maxLineNumber, out int line))
{
// Subtract 1 because the dialog returns a 1-based number
result = this.GoToLine(line - 1);
}
}
}
return(result);
}
public DisplayLine(DiffViewLine line, bool showWhitespace, int spacesPerTab)
: this()
{
this.line = line;
this.showWhitespace = showWhitespace;
this.spacesPerTab = spacesPerTab;
}
public bool GoToLine(int line)
{
bool result = false;
// We know the original line number will be in a DiffViewLine at a position >= iLine.
if (line >= 0 && this.lines != null && line < this.lines.Count)
{
for (int i = line; i < this.lines.Count; i++)
{
DiffViewLine diffLine = this.lines[i];
if (diffLine.Number.HasValue && diffLine.Number.Value == line)
{
this.GoToPosition(i, 0);
result = true;
}
}
}
return(result);
}
public void SetCounterpartLines(DiffView counterpartView)
{
int numLines = this.LineCount;
if (numLines != counterpartView.LineCount)
{
throw new ArgumentException("The counterpart view has a different number of view lines.", nameof(counterpartView));
}
if (this.lines != null && counterpartView.lines != null)
{
for (int i = 0; i < numLines; i++)
{
DiffViewLine line = this.lines[i];
DiffViewLine counterpart = counterpartView.lines[i];
// Make the counterpart lines refer to each other.
line.Counterpart = counterpart;
counterpart.Counterpart = line;
}
}
}
private void RenderImage()
{
if (this.image != null)
{
this.image.Dispose();
this.image = null;
}
int width = this.ClientSize.Width;
int height = this.ClientSize.Height;
if (width > 0 && height > 0 && this.view != null && this.view.Lines != null)
{
// Draw a bitmap in memory that we can render from
this.image = new Bitmap(width, height);
using (Graphics g = Graphics.FromImage(this.image))
using (SolidBrush backBrush = new(this.BackColor))
{
g.FillRectangle(backBrush, 0, 0, width, height);
const float GutterWidth = 2.0F;
// Make sure each line is at least 1 pixel high
float lineHeight = (float)Math.Max(1.0, this.GetPixelLineHeightF(1));
DiffViewLines lines = this.view.Lines;
int numLines = lines.Count;
for (int i = 0; i < numLines; i++)
{
DiffViewLine line = lines[i];
if (line.Edited)
{
backBrush.Color = DiffOptions.GetColorForEditType(line.EditType);
float y = this.GetPixelLineHeightF(i);
float fullFillWidth = width - (2 * GutterWidth);
switch (line.EditType)
{
case EditType.Change:
// Draw all the way across
g.FillRectangle(backBrush, GutterWidth, y, fullFillWidth, lineHeight);
break;
case EditType.Delete:
// Draw delete on the left and dead space on the right.
g.FillRectangle(backBrush, GutterWidth, y, fullFillWidth / 2, lineHeight);
using (Brush? deadBrush = DiffOptions.TryCreateDeadSpaceBrush(backBrush.Color))
{
g.FillRectangle(deadBrush ?? backBrush, GutterWidth + (fullFillWidth / 2), y, fullFillWidth / 2, lineHeight);
}
break;
case EditType.Insert:
// Draw dead space on the left and insert on the right.
using (Brush? deadBrush = DiffOptions.TryCreateDeadSpaceBrush(backBrush.Color))
{
g.FillRectangle(deadBrush ?? backBrush, GutterWidth, y, fullFillWidth / 2, lineHeight);
}
g.FillRectangle(backBrush, GutterWidth + (fullFillWidth / 2), y, fullFillWidth / 2, lineHeight);
break;
}
}
}
}
}
}
public void SetData(DiffViewLine lineOne, DiffViewLine lineTwo)
{
this.lines = new DiffViewLines(lineOne, lineTwo);
this.UpdateAfterSetData();
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
// Get scroll positions
int posY = this.VScrollPos;
int posX = this.HScrollPos;
// Find painting limits
int numLines = this.LineCount;
int firstLine = Math.Max(0, posY + (e.ClipRectangle.Top / this.lineHeight));
int lastCalcLine = posY + (e.ClipRectangle.Bottom / this.lineHeight);
int lastLine = Math.Min(numLines - 1, lastCalcLine);
// Create some graphics objects
Graphics g = e.Graphics;
using (SolidBrush fontBrush = new(this.Enabled ? this.ForeColor : SystemColors.GrayText))
using (SolidBrush backBrush = new(this.BackColor))
{
// We can't free GutterBrush since it is a system brush.
Brush gutterBrush = SystemBrushes.Control;
// Set the correct origin for HatchBrushes (used when painting dead space).
g.RenderingOrigin = new Point(-posX, -posY);
// See what we need to paint. For horz scrolling,
// the gutter won't need it. For focus changes,
// the lines won't need it.
bool paintGutter = e.ClipRectangle.X < this.gutterWidth;
bool paintLine = e.ClipRectangle.X + e.ClipRectangle.Width >= this.gutterWidth;
bool hasFocus = this.Focused;
// Indent the gutter text horizontally a little bit
int lineNumIndent = this.charWidth / 2; // This centers it since it has 1 extra char width
// Determine the selection positions in forward order
bool hasSelection = this.HasSelection;
this.GetForwardOrderSelection(out DiffViewPosition startSel, out DiffViewPosition endSel);
// Paint each line
if (this.lines != null)
{
for (int i = firstLine; i <= lastLine; i++)
{
// If we get inside this loop there must be at least one line.
Debug.Assert(this.LineCount > 0, "There must be at least one line.");
int x = (this.charWidth * (-posX)) + this.gutterWidth;
int y = this.lineHeight * (i - posY);
DiffViewLine line = this.lines[i];
if (paintLine)
{
this.DrawLine(g, fontBrush, backBrush, hasFocus, i, line, x, y, hasSelection, startSel, endSel);
}
if (paintGutter)
{
this.DrawGutter(g, fontBrush, backBrush, hasFocus, i, line, y, gutterBrush, lineNumIndent);
}
}
}
// Draw the background and an empty gutter for any
// blank lines past the end of the actual lines.
backBrush.Color = this.BackColor;
for (int i = lastLine + 1; i <= lastCalcLine; i++)
{
int y = this.lineHeight * (i - posY);
this.DrawBackground(g, backBrush, y, true);
if (paintGutter)
{
this.DrawGutterBackground(g, gutterBrush, backBrush, y);
}
}
}
}
