/**
* Applies decoration styles to the decorated string and adds the styles of the previously
* undecorated string.
*
* <p>If the <code>decoratedString</code> contains the <code>styledString</code>, then the result
* keeps the styles of the <code>styledString</code> and styles the decorations with the <code>
* decorationStyler</code>. Otherwise, the decorated string is returned without any styles.
*
* @param decoratedString the decorated string
* @param decorationStyler the styler to use for the decoration or <code>null</code> for no styles
* @param styledString the original styled string
* @return the styled decorated string (can be the given <code>styledString</code>)
* @since 3.5
*/
public static StyledString styleDecoratedString(
String decoratedString, StyledString.Styler decorationStyler, StyledString styledString) {
String label = styledString.getString();
int originalStart = decoratedString.indexOf(label);
if (originalStart == -1) {
return new StyledString(decoratedString); // the decorator did something wild
}
if (decoratedString.length() == label.length()) return styledString;
if (originalStart > 0) {
StyledString newString =
new StyledString(decoratedString.substring(0, originalStart), decorationStyler);
newString.append(styledString);
styledString = newString;
}
if (decoratedString.length() > originalStart + label.length()) { // decorator appended something
return styledString.append(
decoratedString.substring(originalStart + label.length()), decorationStyler);
}
return styledString; // no change
}
