StyledText uses instances of the StyleRange class to track the colors and styles.
Each StyleRange controls a portion of the StyledText's text:
its starting offset
its length (in characters) of the portion
the foreground color
background color,
font style.
StyleRange Fields
FieldDescription
Color backgroundThe background color, or null to for the default background color.
int fontStyleThe font style (SWT.NORMAL or SWT.BOLD).
Color foregroundThe foreground color, or null for the default foreground color.
int lengthThe length, in number of characters.
int startThe starting offset.