internal void EnsureCursorVisible(int column, int line)
{
if (this.MaxVisibleLines <= 0)
{
return; // Not ready to do so yet.
}
int vertPageSize = this.MaxVisibleLines;
int currentTopLine = (int)Math.Floor(VerticalOffset / Configurations.FontDisplayHeight);
int newTopLine = currentTopLine;
if (line < currentTopLine)
{
newTopLine = line;
}
else if (line >= (currentTopLine + vertPageSize))
{
newTopLine = line - vertPageSize + 1;
}
else if (contentExtent.Height <= viewportSize.Height)
{
newTopLine = 0;
}
if (newTopLine != currentTopLine)
{
SetVerticalOffset(newTopLine * Configurations.FontDisplayHeight);
}
int horzPageSize = GetMaxVisibleColumns(viewportSize.Width);
int currentLeftColumn = (int)Math.Floor(HorizontalOffset / Configurations.FormatFontWidth);
// What is visible is "visual", does not mean the actual character offset.
// For a meaningful comparison, we need to convert from "actual offset" to
// "visual offset" before comparing it with "currentLeftColumn" (visual).
//
CharPosition converter = Solution.Current.ActiveScript.CreateCharPosition();
int visualColumn = converter.CharToVisualOffset(line, column);
int newLeftColumn = currentLeftColumn;
if (visualColumn < currentLeftColumn)
{
newLeftColumn = visualColumn;
}
else if (visualColumn >= (currentLeftColumn + horzPageSize))
{
newLeftColumn = visualColumn - horzPageSize + 1;
}
else if (contentExtent.Width <= viewportSize.Width)
{
newLeftColumn = 0;
}
if (newLeftColumn != currentLeftColumn)
{
SetHorizontalOffset(newLeftColumn * Configurations.FormatFontWidth);
}
}
//[Test]
public void TestCharPosition19()
{
//Testing CharToVisualOffset if the line is empty
TextBuffer textBuffer = new TextBuffer("hello\n\n\t\tcruel\n\tworld");
coordinates = new CharPosition(textBuffer);
int offset = coordinates.CharToVisualOffset(4, 4);
Assert.AreEqual(0, offset);
}
//[Test]
public void TestCharPosition18()
{
//Testing that tab is converted to 4 characters by chartovisualoffset
TextBuffer textBuffer = new TextBuffer("hello\n\n\t\tcruel\n\tworld");
coordinates = new CharPosition(textBuffer);
int offset = coordinates.CharToVisualOffset(2, 2);
Assert.AreEqual(8, offset);
}
//[Test]
public void TestCharPosition22()
{
TextBuffer textBuffer = new TextBuffer("hello\n\n\t\tcruel\n\tworld");
coordinates = new CharPosition(textBuffer);
int offset = coordinates.CharToVisualOffset(2, -1);
Assert.AreEqual(0, offset);
int charoffset = coordinates.VisualToCharOffset(2, offset);
Assert.AreEqual(0, charoffset);
}
//[Test]
public void TestCharPosition20()
{
//Testing VisualToCharOffset for tab character
TextBuffer textBuffer = new TextBuffer("hello\n\n\t\tcruel\n\tworld");
coordinates = new CharPosition(textBuffer);
int offset = coordinates.CharToVisualOffset(2, 2);
Assert.AreEqual(8, offset);
int charoffset = coordinates.VisualToCharOffset(2, offset);
Assert.AreEqual(2, charoffset);
}
public void TestCharPosition22()
{
TextBuffer textBuffer = new TextBuffer("hello\n\n\t\tcruel\n\tworld");
coordinates = new CharPosition(textBuffer);
int offset = coordinates.CharToVisualOffset(2, -1);
Assert.AreEqual(0, offset);
int charoffset = coordinates.VisualToCharOffset(2, offset);
Assert.AreEqual(0, charoffset);
}
public void TestCharPosition21()
{
//Testing VisualToCharOffset if line is empty
TextBuffer textBuffer = new TextBuffer("hello\n\n\t\tcruel\n\tworld");
coordinates = new CharPosition(textBuffer);
int offset = coordinates.CharToVisualOffset(4, 4);
int charoffset = coordinates.VisualToCharOffset(4, offset);
Assert.AreEqual(0, charoffset);
}
public void TestCharPosition20()
{
//Testing VisualToCharOffset for tab character
TextBuffer textBuffer = new TextBuffer("hello\n\n\t\tcruel\n\tworld");
coordinates = new CharPosition(textBuffer);
int offset = coordinates.CharToVisualOffset(2, 2);
Assert.AreEqual(8, offset);
int charoffset = coordinates.VisualToCharOffset(2, offset);
Assert.AreEqual(2, charoffset);
}
public void TestCharPosition18()
{
//Testing that tab is converted to 4 characters by chartovisualoffset
TextBuffer textBuffer = new TextBuffer("hello\n\n\t\tcruel\n\tworld");
coordinates = new CharPosition(textBuffer);
int offset = coordinates.CharToVisualOffset(2, 2);
Assert.AreEqual(8, offset);
}