Chapter 13. Examples of I18N

99

}

if (font >font != NULL)

XFreeFont(dpy, font >font);

if ((font >font = XLoadQueryFont(dpy, font >name)) == NULL)

{

if (Scr >DefaultFont.name) {

deffontname = Scr >DefaultFont.name;

}

if ((font >font = XLoadQueryFont(dpy, deffontname)) == NULL)

{

fprintf (stderr, "%s:

unable to open fonts \"%s\" or \"%s\"\n",

ProgramName, font >name, deffontname);

exit(1);

}

}

font >height = font >font >ascent + font >font >descent;

font >y = font >font >ascent;

font >ascent = font >font >ascent;

font >descent = font >font >descent;

}

This function can be divided into two large parts by

if (use_fontset)

. The part inside the

if

is for internationalized version and other part is for conventional version. Conventional version

is used when

use_fontset

is false, as you can see. This part is almost the same as the original

TWM.

Now let's study the internationalized part of

GetFont()

. It is convenient to compare the inter 

nationalized part and conventional part, to study it. The first check and

XFreeFontSet()

is a

replacement of

XFreeFont()

. The next several lines is the automatic font guessing mechanism (the

simplest version), the second item of the whole patch. It only adds  ,*  to the font query string.

Then the added string is passed into

XCreateFontSet()

, the key function of font preparation.

13.1.4 Automatic Font Guessing

Let's imagine how this  ,*  works. Assume

ja_JP.eucJP

locale, where EUC JP encoding is used.

In EUC JP encoding, three fonts of

  a font with charset (in XLFD meaning) of ISO8859 1 or JISX0201.1976 0,