internal PdfChunk Split(float width)
{
newlineSplit = false;
if (image != null) {
if (image.ScaledWidth > width) {
PdfChunk pc = new PdfChunk(Chunk.OBJECT_REPLACEMENT_CHARACTER, this);
value = "";
attributes = new Dictionary<string,object>();
image = null;
font = PdfFont.DefaultFont;
return pc;
}
else
return null;
}
IHyphenationEvent hyphenationEvent = null;
if (noStroke.ContainsKey(Chunk.HYPHENATION))
hyphenationEvent = (IHyphenationEvent)noStroke[Chunk.HYPHENATION];
int currentPosition = 0;
int splitPosition = -1;
float currentWidth = 0;
// loop over all the characters of a string
// or until the totalWidth is reached
int lastSpace = -1;
float lastSpaceWidth = 0;
int length = value.Length;
char[] valueArray = value.ToCharArray();
char character = (char)0;
BaseFont ft = font.Font;
bool surrogate = false;
if (ft.FontType == BaseFont.FONT_TYPE_CJK && ft.GetUnicodeEquivalent(' ') != ' ') {
while (currentPosition < length) {
// the width of every character is added to the currentWidth
char cidChar = valueArray[currentPosition];
character = (char)ft.GetUnicodeEquivalent(cidChar);
// if a newLine or carriageReturn is encountered
if (character == '\n') {
newlineSplit = true;
string returnValue = value.Substring(currentPosition + 1);
value = value.Substring(0, currentPosition);
if (value.Length < 1) {
value = "\u0001";
}
PdfChunk pc = new PdfChunk(returnValue, this);
return pc;
}
currentWidth += GetCharWidth(cidChar);
if (character == ' ') {
lastSpace = currentPosition + 1;
lastSpaceWidth = currentWidth;
}
if (currentWidth > width)
break;
// if a split-character is encountered, the splitPosition is altered
if (splitCharacter.IsSplitCharacter(0, currentPosition, length, valueArray, thisChunk))
splitPosition = currentPosition + 1;
currentPosition++;
}
}
else {
while (currentPosition < length) {
// the width of every character is added to the currentWidth
character = valueArray[currentPosition];
// if a newLine or carriageReturn is encountered
if (character == '\r' || character == '\n') {
newlineSplit = true;
int inc = 1;
if (character == '\r' && currentPosition + 1 < length && valueArray[currentPosition + 1] == '\n')
inc = 2;
string returnValue = value.Substring(currentPosition + inc);
value = value.Substring(0, currentPosition);
if (value.Length < 1) {
value = " ";
}
PdfChunk pc = new PdfChunk(returnValue, this);
return pc;
}
surrogate = Utilities.IsSurrogatePair(valueArray, currentPosition);
if (surrogate)
currentWidth += GetCharWidth(Utilities.ConvertToUtf32(valueArray[currentPosition], valueArray[currentPosition + 1]));
else
currentWidth += GetCharWidth(character);
if (character == ' ') {
lastSpace = currentPosition + 1;
lastSpaceWidth = currentWidth;
}
if (surrogate)
currentPosition++;
if (currentWidth > width)
break;
// if a split-character is encountered, the splitPosition is altered
if (splitCharacter.IsSplitCharacter(0, currentPosition, length, valueArray, null))
splitPosition = currentPosition + 1;
currentPosition++;
}
}
// if all the characters fit in the total width, null is returned (there is no overflow)
if (currentPosition == length) {
return null;
}
// otherwise, the string has to be truncated
if (splitPosition < 0) {
string returnValue = value;
value = "";
PdfChunk pc = new PdfChunk(returnValue, this);
return pc;
}
if (lastSpace > splitPosition && splitCharacter.IsSplitCharacter(0, 0, 1, singleSpace, null))
splitPosition = lastSpace;
if (hyphenationEvent != null && lastSpace >= 0 && lastSpace < currentPosition) {
int wordIdx = GetWord(value, lastSpace);
if (wordIdx > lastSpace) {
string pre = hyphenationEvent.GetHyphenatedWordPre(value.Substring(lastSpace, wordIdx - lastSpace), font.Font, font.Size, width - lastSpaceWidth);
string post = hyphenationEvent.HyphenatedWordPost;
if (pre.Length > 0) {
string returnValue = post + value.Substring(wordIdx);
value = Trim(value.Substring(0, lastSpace) + pre);
PdfChunk pc = new PdfChunk(returnValue, this);
return pc;
}
}
}
string retVal = value.Substring(splitPosition);
value = Trim(value.Substring(0, splitPosition));
PdfChunk tmp = new PdfChunk(retVal, this);
return tmp;
}
// methods
/**
* Adds a <CODE>PdfChunk</CODE> to the <CODE>PdfLine</CODE>.
*
* @param chunk the <CODE>PdfChunk</CODE> to add
* @return <CODE>null</CODE> if the chunk could be added completely; if not
* a <CODE>PdfChunk</CODE> containing the part of the chunk that could
* not be added is returned
*/
internal PdfChunk Add(PdfChunk chunk)
{
// nothing happens if the chunk is null.
if (chunk == null || chunk.ToString().Equals(""))
{
return(null);
}
// we split the chunk to be added
PdfChunk overflow = chunk.Split(width);
newlineSplit = (chunk.IsNewlineSplit() || overflow == null);
// if (chunk.IsNewlineSplit() && alignment == Element.ALIGN_JUSTIFIED)
// alignment = Element.ALIGN_LEFT;
// if the length of the chunk > 0 we add it to the line
if (chunk.Length > 0)
{
if (overflow != null)
{
chunk.TrimLastSpace();
}
width -= chunk.Width;
line.Add(chunk);
}
// if the length == 0 and there were no other chunks added to the line yet,
// we risk to end up in an endless loop trying endlessly to add the same chunk
else if (line.Count < 1)
{
chunk = overflow;
overflow = chunk.Truncate(width);
width -= chunk.Width;
if (chunk.Length > 0)
{
line.Add(chunk);
return(overflow);
}
// if the chunck couldn't even be truncated, we add everything, so be it
else
{
if (overflow != null)
{
line.Add(overflow);
}
return(null);
}
}
else
{
width += ((PdfChunk)(line[line.Count - 1])).TrimLastSpace();
}
return(overflow);
}
