PDFlib 8 Windows COM/.NET Tutorial

To fold the famous rocket looper proceed as follows:
Take a sheet of paper. Fold it
lengthwise in the middle.
Then, fold down the upper corners. Fold the
long sides inwards
that the points A and B meet on the central fold.
To fold the famous rocket looper proceed as follows: Take a sheet of
paper. Fold it lengthwise in the middle. Then, fold down the upper
corners. Fold the long sides inwards that the points A and B meet on
the central fold.
Fig. 8.20
Top: text with redundant line
breaks
Bottom: replacing the linebreaks
with the charmapping option
charmapping={linefeed {linefeed -1}}
Each sequence of CRLF combinations will be replaced with a single space:
charmapping={CRLF {space -1}}
We will take a closer look at the last example. Let’s assume you receive text where the
lines have been separated with fixed line breaks by some other software, and therefore
cannot be properly formatted. You want to replace the linebreaks with space characters
in order to achieve proper formatting within the fitbox. To achieve this we replace arbitrarily
long sequences of linebreaks with a single space character. The initial text looks
as follows:
To fold the famous rocket looper proceed as follows:
Take a sheet of paper. Fold it
lengthwise in the middle.
Then, fold down the upper corners. Fold the
long sides inwards
that the points A and B meet on the central fold.
The following code fragment demonstrates how to replace the redundant linebreak
characters and format the resulting text:
/* assemble option list */
String optlist =
"fontname=Helvetica fontsize=9 encoding=winansi alignment=justify " +
"charmapping {CRLF {space -1}}"
/* place textflow in fitbox */
textflow = p.add_textflow(-1, text, optlist);
if (textflow == -1)
throw new Exception("Error: " + p.get_errmsg());
result = p.fit_textflow(textflow, left_x, left_y, right_x, right_y, "");
if (!result.equals("_stop"))
{ /* ... */ }
p.delete_textflow(textflow);
Figure 8.20 shows Textflow output with the unmodified text and the improved version
with the charmapping option.
8.2 Multi-Line Textflows 217