/**
* 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();
}
}
private void addSpacedWord(string word, LinkSet ls, int startw,
int spacew, TextState textState,
bool addToPending)
{
/*
* Split string based on four delimeters:
* \u00A0 - Latin1 NBSP (Non breaking space)
* \u202F - unknown reserved character according to Unicode Standard
* \u3000 - CJK IDSP (Ideographic space)
* \uFEFF - Arabic ZWN BSP (Zero width no break space)
*/
StringTokenizer st = new StringTokenizer(word, "\u00A0\u202F\u3000\uFEFF", true);
int extraw = 0;
while (st.MoveNext())
{
string currentWord = (string)st.Current;
if (currentWord.Length == 1
&& (isNBSP(currentWord[0])))
{
// Add an InlineSpace
int spaceWidth = getCharWidth(currentWord[0]);
if (spaceWidth > 0)
{
InlineSpace ispace = new InlineSpace(spaceWidth);
extraw += spaceWidth;
if (prevUlState)
{
ispace.setUnderlined(textState.getUnderlined());
}
if (prevOlState)
{
ispace.setOverlined(textState.getOverlined());
}
if (prevLTState)
{
ispace.setLineThrough(textState.getLineThrough());
}
if (addToPending)
{
pendingAreas.Add(ispace);
pendingWidth += spaceWidth;
}
else
{
addChild(ispace);
}
}
}
else
{
WordArea ia = new WordArea(currentFontState, this.red,
this.green, this.blue,
currentWord,
getWordWidth(currentWord));
ia.setYOffset(placementOffset);
ia.setUnderlined(textState.getUnderlined());
prevUlState = textState.getUnderlined();
ia.setOverlined(textState.getOverlined());
prevOlState = textState.getOverlined();
ia.setLineThrough(textState.getLineThrough());
prevLTState = textState.getLineThrough();
ia.setVerticalAlign(vAlign);
if (addToPending)
{
pendingAreas.Add(ia);
pendingWidth += getWordWidth(currentWord);
}
else
{
addChild(ia);
}
if (ls != null)
{
Rectangle lr = new Rectangle(startw + extraw, spacew,
ia.getContentWidth(),
fontState.FontSize);
ls.addRect(lr, this, ia);
}
}
}
}
private void AddWordLines(WordArea area, int rx, int bl, int size,
PdfColor theAreaColor) {
if (area.getUnderlined()) {
int yPos = bl - size/10;
AddLine(rx, yPos, rx + area.getContentWidth(), yPos, size/14,
theAreaColor);
// save position for underlining a following InlineSpace
prevUnderlineXEndPos = rx + area.getContentWidth();
prevUnderlineYEndPos = yPos;
prevUnderlineSize = size/14;
prevUnderlineColor = theAreaColor;
}
if (area.getOverlined()) {
int yPos = bl + area.GetFontState().Ascender + size/10;
AddLine(rx, yPos, rx + area.getContentWidth(), yPos, size/14,
theAreaColor);
prevOverlineXEndPos = rx + area.getContentWidth();
prevOverlineYEndPos = yPos;
prevOverlineSize = size/14;
prevOverlineColor = theAreaColor;
}
if (area.getLineThrough()) {
int yPos = bl + area.GetFontState().Ascender*3/8;
AddLine(rx, yPos, rx + area.getContentWidth(), yPos, size/14,
theAreaColor);
prevLineThroughXEndPos = rx + area.getContentWidth();
prevLineThroughYEndPos = yPos;
prevLineThroughSize = size/14;
prevLineThroughColor = theAreaColor;
}
}
