/**
* Gets the FontMetrics object for the supplied font. This method caches font metrics to ensure
* native fonts are not loaded twice for the same font.
*/
static synchronized QtFontMetrics getFontMetrics(Font font, boolean backwardCompat) {
/* See if metrics has been stored in font already. */
QtFontMetrics fm = (QtFontMetrics) font.metrics;
if (fm == null) {
boolean strikethrough = false, underline = false;
/* See if a font metrics of the same native name and size has already been loaded.
If it has then we use that one. */
String nativeName = (String) fontNameMap.get(font.name.toLowerCase());
if (nativeName == null) nativeName = (String) fontNameMap.get("default");
String key = nativeName + "." + font.style + "." + font.size;
if (!backwardCompat) {
Map fa = font.getAttributes();
Object obj;
if ((obj = fa.get(TextAttribute.STRIKETHROUGH)) != null) {
if (obj.equals(TextAttribute.STRIKETHROUGH_ON)) {
key += ".s";
strikethrough = true;
}
}
if ((obj = fa.get(TextAttribute.UNDERLINE)) != null) {
if (obj.equals(TextAttribute.UNDERLINE_ON)) {
key += ".u";
underline = true;
}
}
}
fm = (QtFontMetrics) fontMetricsMap.get(key);
if (fm == null) {
fontMetricsMap.put(
key, fm = new QtFontMetrics(font, nativeName, font.style, strikethrough, underline));
}
font.metrics = fm;
}
return fm;
}
