private static StringCollection GenerateLinesWithoutWordWrap(DisplayCells displayCells, string val, int firstLineLen, int followingLinesLen)
{
StringCollection retVal = new StringCollection();
if (string.IsNullOrEmpty(val))
{
// if null or empty, just add and we are done
retVal.Add(val);
return(retVal);
}
// break string on newlines and process each line separately
string[] lines = SplitLines(val);
for (int k = 0; k < lines.Length; k++)
{
string currentLine = lines[k];
if (currentLine == null || displayCells.Length(currentLine) <= firstLineLen)
{
// we do not need to split further, just add
retVal.Add(currentLine);
continue;
}
// the string does not fit, so we have to wrap around on multiple lines
// for each of these lines in the string, the first line will have
// a (potentially) different length (indentation or hanging)
// for each line, start a new state
SplitLinesAccumulator accumulator = new SplitLinesAccumulator(retVal, firstLineLen, followingLinesLen);
int offset = 0; // offset into the line we are splitting
while (offset < currentLine.Length)
{
// acquire the current active display line length (it can very from call to call)
int currentDisplayLen = accumulator.ActiveLen;
// determine if the current tail would fit or not
// for the remaining part of the string, determine its display cell count
int currentCellsToFit = displayCells.Length(currentLine, offset);
// determine if we fit into the line
int excessCells = currentCellsToFit - currentDisplayLen;
if (excessCells > 0)
{
// we are not at the end of the string, select a sub string
// that would fit in the remaining display length
int charactersToAdd = displayCells.TruncateTail(currentLine, offset, currentDisplayLen);
if (charactersToAdd <= 0)
{
// corner case: we have a two cell character and the current
// display length is one.
// add a single cell arbitrary character instead of the original
// one and keep going
charactersToAdd = 1;
accumulator.AddLine("?");
}
else
{
// of the given length, add it to the accumulator
accumulator.AddLine(currentLine.VtSubstring(offset, charactersToAdd));
}
// increase the offset by the # of characters added
offset += charactersToAdd;
}
else
{
// we reached the last (partial) line, we add it all
accumulator.AddLine(currentLine.VtSubstring(offset));
break;
}
}
}
return(retVal);
}
private static string GenerateRowField(string val, int width, int alignment, DisplayCells dc, bool addPadding)
{
// make sure the string does not have any embedded <CR> in it
string s = StringManipulationHelper.TruncateAtNewLine(val);
int currentValueDisplayLength = dc.Length(s);
if (currentValueDisplayLength < width)
{
// the string is shorter than the width of the column
// need to pad with with blanks to reach the desired width
int padCount = width - currentValueDisplayLength;
switch (alignment)
{
case TextAlignment.Right:
{
s = StringUtil.Padding(padCount) + s;
}
break;
case TextAlignment.Center:
{
// add a bit at both ends of the string
int padLeft = padCount / 2;
int padRight = padCount - padLeft;
s = StringUtil.Padding(padLeft) + s;
if (addPadding)
{
s += StringUtil.Padding(padRight);
}
}
break;
default:
{
if (addPadding)
{
// left align is the default
s += StringUtil.Padding(padCount);
}
}
break;
}
}
else if (currentValueDisplayLength > width)
{
// the string is longer than the width of the column
// truncate and add ellipsis if it's too long
int truncationDisplayLength = width - EllipsisSize;
if (truncationDisplayLength > 0)
{
// we have space for the ellipsis, add it
switch (alignment)
{
case TextAlignment.Right:
{
// get from "abcdef" to "...f"
s = s.VtSubstring(
startOffset: dc.TruncateHead(s, truncationDisplayLength),
prependStr: PSObjectHelper.EllipsisStr,
appendStr: null);
}
break;
default:
{
// left align is the default
// get from "abcdef" to "a..."
s = s.VtSubstring(
startOffset: 0,
length: dc.TruncateTail(s, truncationDisplayLength),
prependStr: null,
appendStr: PSObjectHelper.EllipsisStr);
}
break;
}
}
else
{
// not enough space for the ellipsis, just truncate at the width
switch (alignment)
{
case TextAlignment.Right:
{
// get from "abcdef" to "f"
s = s.VtSubstring(startOffset: dc.TruncateHead(s, width));
}
break;
default:
{
// left align is the default
// get from "abcdef" to "a"
s = s.VtSubstring(startOffset: 0, length: dc.TruncateTail(s, width));
}
break;
}
}
}
// we need to take into consideration that truncation left the string one
// display cell short if a double cell character got truncated
// in this case, we need to pad with a blank
int finalValueDisplayLength = dc.Length(s);
if (finalValueDisplayLength == width)
{
return(s);
}
switch (alignment)
{
case TextAlignment.Right:
{
s = " " + s;
}
break;
case TextAlignment.Center:
{
if (addPadding)
{
s += " ";
}
}
break;
default:
{
// left align is the default
if (addPadding)
{
s += " ";
}
}
break;
}
return(s);
}