public double getStringLength(double textHeight, String string) {
if (string == null) return 0.0d;
double width = 0.0d;
for (int cp : RenderUtils.stringToCodePoints(string)) {
TessChar tc = getTessChar(cp);
width += tc.getAdvance();
}
return width * textHeight / getNominalHeight();
}
/**
* Returns the index of the first character in the string whose x-coordinate is closest to the
* given value.
*
* @param textHeight - height of the text in metres
* @param string - given string
* @param x - x-coordinate whose index number is to be found
* @return index number in the string.
*/
public int getStringPosition(double textHeight, String string, double x) {
if (string == null) return 0;
double scaledX = x / textHeight * getNominalHeight();
double width = 0.0d;
int[] cpList = RenderUtils.stringToCodePoints(string);
for (int i = 0; i < cpList.length; i++) {
TessChar tc = getTessChar(cpList[i]);
if (width + 0.5d * tc.getAdvance() >= scaledX) return i;
width += tc.getAdvance();
}
return cpList.length;
}