/**
* render inline area to PDF
*
* @param area inline area to render
*/
public void RenderWordArea(WordArea area)
{
// TODO: I don't understand why we are locking the private member
// _wordAreaPDF. Maybe this string buffer was originally static? (MG)
lock (_wordAreaPDF)
{
StringBuilder pdf = _wordAreaPDF;
pdf.Length = 0;
GdiKerningPairs kerning = null;
bool kerningAvailable = false;
// If no options are supplied, by default we do not enable kerning
if (options != null && options.Kerning)
{
kerning = area.GetFontState().Kerning;
if (kerning != null && (kerning.Count > 0))
{
kerningAvailable = true;
}
}
String name = area.GetFontState().FontName;
int size = area.GetFontState().FontSize;
// This assumes that *all* CIDFonts use a /ToUnicode mapping
Font font = (Font)area.GetFontState().FontInfo.GetFontByName(name);
bool useMultiByte = font.MultiByteFont;
string startText = useMultiByte ? "<" : "(";
string endText = useMultiByte ? "> " : ") ";
if ((!name.Equals(this.currentFontName)) || (size != this.currentFontSize))
{
CloseText();
this.currentFontName = name;
this.currentFontSize = size;
pdf = pdf.Append("/" + name + " " +
PdfNumber.doubleOut(size / 1000f) + " Tf\n");
}
// Do letter spacing (must be outside of [...] TJ]
float letterspacing = ((float)area.GetFontState().LetterSpacing) / 1000f;
if (letterspacing != this.currentLetterSpacing)
{
this.currentLetterSpacing = letterspacing;
CloseText();
pdf.Append(PdfNumber.doubleOut(letterspacing));
pdf.Append(" Tc\n");
}
PdfColor areaColor = this.currentFill;
if (areaColor == null || areaColor.getRed() != (double)area.getRed() ||
areaColor.getGreen() != (double)area.getGreen() ||
areaColor.getBlue() != (double)area.getBlue())
{
areaColor = new PdfColor((double)area.getRed(),
(double)area.getGreen(),
(double)area.getBlue());
CloseText();
this.currentFill = areaColor;
pdf.Append(this.currentFill.getColorSpaceOut(true));
}
int rx = this.currentXPosition;
int bl = this.currentYPosition;
AddWordLines(area, rx, bl, size, areaColor);
if (!textOpen || bl != prevWordY)
{
CloseText();
pdf.Append("1 0 0 1 " + PdfNumber.doubleOut(rx / 1000f) +
" " + PdfNumber.doubleOut(bl / 1000f) + " Tm [" + startText);
prevWordY = bl;
textOpen = true;
}
else
{
// express the space between words in thousandths of an em
int space = prevWordX - rx + prevWordWidth;
float emDiff = (float)space / (float)currentFontSize * 1000f;
// this prevents a problem in Acrobat Reader where large
// numbers cause text to disappear or default to a limit
if (emDiff < -33000)
{
CloseText();
pdf.Append("1 0 0 1 " + PdfNumber.doubleOut(rx / 1000f) +
" " + PdfNumber.doubleOut(bl / 1000f) + " Tm [" + startText);
textOpen = true;
}
else
{
pdf.Append(PdfNumber.doubleOut(emDiff));
pdf.Append(" ");
pdf.Append(startText);
}
}
prevWordWidth = area.getContentWidth();
prevWordX = rx;
string s;
if (area.getPageNumberID() != null)
{
// This text is a page number, so resolve it
s = idReferences.getPageNumber(area.getPageNumberID());
if (s == null)
{
s = String.Empty;
}
}
else
{
s = area.getText();
}
int wordLength = s.Length;
for (int index = 0; index < wordLength; index++)
{
ushort ch = area.GetFontState().MapCharacter(s[index]);
if (!useMultiByte)
{
if (ch > 127)
{
pdf.Append("\\");
pdf.Append(Convert.ToString((int)ch, 8));
}
else
{
switch (ch)
{
case '(':
case ')':
case '\\':
pdf.Append("\\");
break;
}
pdf.Append((char)ch);
}
}
else
{
pdf.Append(GetUnicodeString(ch));
}
if (kerningAvailable && (index + 1) < wordLength)
{
ushort ch2 = area.GetFontState().MapCharacter(s[index + 1]);
AddKerning(pdf, ch, ch2, kerning, startText, endText);
}
}
pdf.Append(endText);
currentStream.Write(pdf.ToString());
this.currentXPosition += area.getContentWidth();
}
}
