/// <summary>
/// Creates a list of segments to split the line into
/// in order to draw selection boxes
/// </summary>
/// <returns></returns>
protected List <UITextEditLineSegment> CalculateSegments(UITextEditLine line)
{
var result = new List <UITextEditLineSegment>();
if (SelectionEnd != -1)
{
/** There is a selection **/
var start = SelectionStart == -1 ? m_SBuilder.Length : SelectionStart;
var end = SelectionEnd == -1 ? m_SBuilder.Length : SelectionEnd;
if (end < start)
{
var temp = start;
start = end;
end = temp;
}
var lineStart = line.StartIndex;
var lineEnd = lineStart + line.Text.Length;
/**
* Options:
* This line has no selection,
* Selection starts on this line
* Selection ends on this line
* The whole line is selected
*/
if (start >= lineStart && start < lineEnd)
{
/** Selection starts on this line, we need a prefix **/
var prefixEnd = start - lineStart;
if (prefixEnd != 0)
{
result.Add(new UITextEditLineSegment
{
Selected = false,
Text = line.Text.Substring(0, prefixEnd)
});
}
/** Up until the end **/
var selectionEnd = line.Text.Length;
if (end + 1 < lineEnd)
{
selectionEnd -= (lineEnd - end);
}
result.Add(new UITextEditLineSegment
{
Selected = true,
Text = line.Text.Substring(prefixEnd, selectionEnd - prefixEnd)
});
/** Suffix? **/
if (end + 1 < lineEnd)
{
result.Add(new UITextEditLineSegment
{
Selected = false,
Text = line.Text.Substring(selectionEnd)
});
}
}
else if (start < lineStart && end >= lineStart && end <= lineEnd)
{
/** Selection ends on this line **/
/** Up until the end **/
var selectionEnd = line.Text.Length;
if (end + 1 < lineEnd)
{
selectionEnd -= (lineEnd - end);
}
result.Add(new UITextEditLineSegment
{
Selected = true,
Text = line.Text.Substring(0, selectionEnd)
});
/** Suffix? **/
if (end + 1 < lineEnd)
{
result.Add(new UITextEditLineSegment
{
Selected = false,
Text = line.Text.Substring(selectionEnd)
});
}
}
else if (start < lineStart && end > lineEnd)
{
/** The whole line is selected **/
result.Add(new UITextEditLineSegment
{
Text = line.Text,
Selected = true
});
}
else
{
result.Add(new UITextEditLineSegment
{
Text = line.Text,
Selected = false
});
}
//if (lineStart >= start && lineEnd <= end)
//{
// /** Part of this line is selected **/
// result.Add(new UITextEditLineSegment
// {
// Selected = true,
// Text = line.Text
// });
//}
}
else
{
result.Add(new UITextEditLineSegment
{
Text = line.Text,
Selected = false
});
}
return(result);
}
/// <summary>
/// Creates a list of segments to split the line into
/// in order to draw selection boxes
/// </summary>
/// <returns></returns>
protected List<UITextEditLineSegment> CalculateSegments(UITextEditLine line)
{
var result = new List<UITextEditLineSegment>();
if (SelectionEnd != -1)
{
/** There is a selection **/
var start = SelectionStart == -1 ? m_SBuilder.Length : SelectionStart;
var end = SelectionEnd == -1 ? m_SBuilder.Length : SelectionEnd;
if (end < start)
{
var temp = start;
start = end;
end = temp;
}
var lineStart = line.StartIndex;
var lineEnd = lineStart + line.Text.Length;
/**
* Options:
* This line has no selection,
* Selection starts on this line
* Selection ends on this line
* The whole line is selected
*/
if (start >= lineStart && start < lineEnd)
{
/** Selection starts on this line, we need a prefix **/
var prefixEnd = start - lineStart;
if (prefixEnd != 0)
{
result.Add(new UITextEditLineSegment
{
Selected = false,
Text = line.Text.Substring(0, prefixEnd)
});
}
/** Up until the end **/
var selectionEnd = line.Text.Length;
if (end + 1 < lineEnd)
{
selectionEnd -= (lineEnd - end);
}
result.Add(new UITextEditLineSegment
{
Selected = true,
Text = line.Text.Substring(prefixEnd, selectionEnd - prefixEnd)
});
/** Suffix? **/
if (end + 1 < lineEnd)
{
result.Add(new UITextEditLineSegment
{
Selected = false,
Text = line.Text.Substring(selectionEnd)
});
}
}
else if (start < lineStart && end >= lineStart && end <= lineEnd)
{
/** Selection ends on this line **/
/** Up until the end **/
var selectionEnd = line.Text.Length;
if (end + 1 < lineEnd)
{
selectionEnd -= (lineEnd - end);
}
result.Add(new UITextEditLineSegment
{
Selected = true,
Text = line.Text.Substring(0, selectionEnd)
});
/** Suffix? **/
if (end + 1 < lineEnd)
{
result.Add(new UITextEditLineSegment
{
Selected = false,
Text = line.Text.Substring(selectionEnd)
});
}
}
else if (start < lineStart && end > lineEnd)
{
/** The whole line is selected **/
result.Add(new UITextEditLineSegment
{
Text = line.Text,
Selected = true
});
}
else
{
result.Add(new UITextEditLineSegment
{
Text = line.Text,
Selected = false
});
}
}
else
{
result.Add(new UITextEditLineSegment
{
Text = line.Text,
Selected = false
});
}
return result;
}
