/// <summary>
/// Write out the columns. After writing, use
/// {@link #isOverflow()} to see if all text was written.
/// @throws DocumentException on error
/// </summary>
/// <param name="canvas">PdfContentByte to write with</param>
/// <param name="document">document to write to (only used to get page limit info)</param>
/// <param name="documentY">starting y position to begin writing at</param>
/// <returns>the current height (y position) after writing the columns</returns>
public float Write(PdfContentByte canvas, PdfDocument document, float documentY)
{
_document = document;
_columnText.Canvas = canvas;
if (_columnDefs.Count == 0)
{
throw new DocumentException("MultiColumnText has no columns");
}
_overflow = false;
float currentHeight = 0;
bool done = false;
while (!done)
{
if (_top.ApproxEquals(AUTOMATIC))
{
_top = document.GetVerticalPosition(true);
}
else if (_nextY.ApproxEquals(AUTOMATIC))
{
_nextY = document.GetVerticalPosition(true); // RS - 07/07/2005 - - Get current doc writing position for top of columns on new page.
}
ColumnDef currentDef = (ColumnDef)_columnDefs[CurrentColumn];
_columnText.YLine = _top;
float[] left = currentDef.ResolvePositions(Rectangle.LEFT_BORDER);
float[] right = currentDef.ResolvePositions(Rectangle.RIGHT_BORDER);
if (document.IsMarginMirroring() && document.PageNumber % 2 == 0)
{
float delta = document.RightMargin - document.Left;
left = (float[])left.Clone();
right = (float[])right.Clone();
for (int i = 0; i < left.Length; i += 2)
{
left[i] -= delta;
}
for (int i = 0; i < right.Length; i += 2)
{
right[i] -= delta;
}
}
currentHeight = Math.Max(currentHeight, getHeight(left, right));
if (currentDef.IsSimple())
{
_columnText.SetSimpleColumn(left[2], left[3], right[0], right[1]);
}
else
{
_columnText.SetColumns(left, right);
}
int result = _columnText.Go();
if ((result & ColumnText.NO_MORE_TEXT) != 0)
{
done = true;
_top = _columnText.YLine;
}
else if (ShiftCurrentColumn())
{
_top = _nextY;
}
else
{ // check if we are done because of height
_totalHeight += currentHeight;
if ((_desiredHeight.ApproxNotEqual(AUTOMATIC)) && (_totalHeight >= _desiredHeight))
{
_overflow = true;
break;
}
else
{ // need to start new page and reset the columns
documentY = _nextY;
newPage();
currentHeight = 0;
}
}
}
if (_desiredHeight.ApproxEquals(AUTOMATIC) && _columnDefs.Count == 1)
{
currentHeight = documentY - _columnText.YLine;
}
return(currentHeight);
}
/**
* Write out the columns. After writing, use
* {@link #isOverflow()} to see if all text was written.
* @param canvas PdfContentByte to write with
* @param document document to write to (only used to get page limit info)
* @param documentY starting y position to begin writing at
* @return the current height (y position) after writing the columns
* @throws DocumentException on error
*/
public float Write(PdfContentByte canvas, PdfDocument document, float documentY)
{
this.document = document;
columnText.Canvas = canvas;
if (columnDefs.Count == 0)
{
throw new DocumentException(MessageLocalization.GetComposedMessage("multicolumntext.has.no.columns"));
}
overflow = false;
float currentHeight = 0;
bool done = false;
while (!done)
{
if (top == AUTOMATIC)
{
top = document.GetVerticalPosition(true);
}
else if (nextY == AUTOMATIC)
{
nextY = document.GetVerticalPosition(true); // RS - 07/07/2005 - - Get current doc writing position for top of columns on new page.
}
ColumnDef currentDef = (ColumnDef)columnDefs[CurrentColumn];
columnText.YLine = top;
float[] left = currentDef.ResolvePositions(Rectangle.LEFT_BORDER);
float[] right = currentDef.ResolvePositions(Rectangle.RIGHT_BORDER);
if (document.IsMarginMirroring() && document.PageNumber % 2 == 0)
{
float delta = document.RightMargin - document.Left;
left = (float[])left.Clone();
right = (float[])right.Clone();
for (int i = 0; i < left.Length; i += 2)
{
left[i] -= delta;
}
for (int i = 0; i < right.Length; i += 2)
{
right[i] -= delta;
}
}
currentHeight = Math.Max(currentHeight, GetHeight(left, right));
if (currentDef.IsSimple())
{
columnText.SetSimpleColumn(left[2], left[3], right[0], right[1]);
}
else
{
columnText.SetColumns(left, right);
}
int result = columnText.Go();
if ((result & ColumnText.NO_MORE_TEXT) != 0)
{
done = true;
top = columnText.YLine;
}
else if (ShiftCurrentColumn())
{
top = nextY;
}
else // check if we are done because of height
{
totalHeight += currentHeight;
if ((desiredHeight != AUTOMATIC) && (totalHeight >= desiredHeight))
{
overflow = true;
break;
}
else // need to start new page and reset the columns
{
documentY = nextY;
NewPage();
currentHeight = 0;
}
}
}
if (desiredHeight == AUTOMATIC && columnDefs.Count == 1)
{
currentHeight = documentY - columnText.YLine;
}
return(currentHeight);
}
// try to balance out the content of the columns to have equal content length
private float getBalanceDesiredHeight(PdfContentByte canvas, PdfDocument document, float documentY)
{
this.document = document;
if (columnDefs.Count == 0)
{
throw new DocumentException("MultiColumnText has no columns");
}
float origintop = top;
float originnextY = nextY;
float originDesired = desiredHeight;
desiredHeight = -1;
float maxHeight = 0; // as much height that's left on the page
top = document.GetVerticalPosition(true);
foreach (ColumnDef cd in columnDefs)
{
float[] left = cd.ResolvePositions(Rectangle.LEFT_BORDER);
float[] right = cd.ResolvePositions(Rectangle.RIGHT_BORDER);
maxHeight = Math.Max(maxHeight, GetHeight(left, right));
}
float measureHeight = maxHeight;
float heightAdust = maxHeight / 2.0f;
float fitHeight = -1;
bool firstPass = true;
while (heightAdust > 0.25)
{
ColumnText columnText = new ColumnText(canvas);
columnText.Canvas = canvas;
columnText.SetACopy(this.columnText);
bool fitAll = false;
desiredHeight = measureHeight;
top = origintop;
nextY = originnextY;
float currentHeight = 0;
bool done = false;
while (!done)
{
if (top == AUTOMATIC)
{
top = document.GetVerticalPosition(true);
}
else if (nextY == AUTOMATIC)
{
nextY = document.GetVerticalPosition(true); // RS - 07/07/2005 - - Get current doc writing position for top of columns on new page.
}
ColumnDef currentDef = (ColumnDef)columnDefs[CurrentColumn];
columnText.YLine = top;
float[] left = currentDef.ResolvePositions(Rectangle.LEFT_BORDER);
float[] right = currentDef.ResolvePositions(Rectangle.RIGHT_BORDER);
if (document.IsMarginMirroring() && document.PageNumber % 2 == 0)
{
float delta = document.RightMargin - document.Left;
left = (float[])left.Clone();
right = (float[])right.Clone();
for (int i = 0; i < left.Length; i += 2)
{
left[i] -= delta;
}
for (int i = 0; i < right.Length; i += 2)
{
right[i] -= delta;
}
}
currentHeight = Math.Max(currentHeight, GetHeight(left, right));
if (currentDef.IsSimple())
{
columnText.SetSimpleColumn(left[2], left[3], right[0], right[1]);
}
else
{
columnText.SetColumns(left, right);
}
int result = columnText.Go(true);
if ((result & ColumnText.NO_MORE_TEXT) != 0)
{
done = true;
top = columnText.YLine;
fitAll = true;
}
else if (ShiftCurrentColumn()) // NO_MORE_COLUMN, try to go to the next column
{
top = nextY;
}
else
{ // check if we are done because of height
fitAll = false;
done = true;
}
}
ResetCurrentColumn();
if (fitAll)
{
fitHeight = measureHeight;
measureHeight -= heightAdust;
}
else
{
measureHeight += heightAdust;
// ok, so we've tried the full length! and it cannot fit.
// leave the current page as is, and we we'll try on the text page
if (firstPass)
{
break;
}
}
heightAdust /= 2.0f;
firstPass = false;
}
top = origintop;
nextY = originnextY;
desiredHeight = originDesired;
return(fitHeight);
}
