public int print(Graphics g, PageFormat pf, int page) throws PrinterException {
if (context instanceof TextWindow) {
TextWindow tw = (TextWindow) context;
if (page == 0) {
allStrings = tw.convertToStrings();
printFont = new Font("Helvetica", Font.PLAIN, 10);
FontMetrics fm = g.getFontMetrics(printFont);
pageHeight = (int) pf.getImageableHeight();
fontHeight = fm.getHeight();
yOffset = fm.getAscent();
linesPerPage = pageHeight / fontHeight;
startLine = startChar = 0;
startPageNumber = 0;
startLineAtPage = startLine;
startCharAtPage = startChar;
frc = new FontRenderContext(null, true, true);
}
if (page == startPageNumber) {
startLine = startLineAtPage;
startChar = startCharAtPage;
} else {
startPageNumber = page;
startLineAtPage = startLine;
startCharAtPage = startChar;
}
if (startLine < allStrings.length) {
g.setColor(Color.WHITE);
g.fillRect(
(int) pf.getImageableX(),
(int) pf.getImageableY(),
(int) pf.getImageableWidth(),
(int) pf.getImageableHeight());
g.setFont(printFont);
g.setColor(Color.BLACK);
for (int i = 0; i < linesPerPage; i++) {
if (startLine >= allStrings.length) break;
String fullLine = allStrings[startLine];
// figure bounding box of text
int endChar = fullLine.length();
String theLine = null;
for (; ; ) {
theLine = fullLine.substring(startChar, endChar);
GlyphVector gv = printFont.createGlyphVector(frc, theLine);
Rectangle2D rasRect = gv.getLogicalBounds();
if (rasRect.getWidth() <= pf.getImageableWidth()) break;
endChar--;
if (endChar <= startChar) break;
}
g.drawString(
theLine,
(int) pf.getImageableX(),
(int) pf.getImageableY() + yOffset + (i * fontHeight));
if (endChar < fullLine.length()) {
// only did partial line
startChar = endChar;
} else {
// completed the line
startLine++;
startChar = 0;
}
}
return Printable.PAGE_EXISTS;
}
} else if (context instanceof EditWindow) {
// only 1 page
if (page == 0) {
graphics = g;
pageFormat = pf;
if (context.getPrintImage(this) != null) return Printable.PAGE_EXISTS;
}
}
return Printable.NO_SUCH_PAGE;
}
