/**
* Inserts a given string into another padding it with spaces. Is aware if the insertion point has
* a space on either end and does not add extra spaces. If the string-to-insert is already present
* (and not part of another word) we return the original string unchanged.
*
* @param s the string to insert into
* @param insertAt the position to insert the string
* @param stringToInsert the string to insert
* @return the result of inserting the stringToInsert into the passed in string
* @throws IndexOutOfBoundsException if the insertAt is negative, or insertAt is larger than the
* length of s String object
*/
public static String insertPaddedIfNeeded(String s, int insertAt, String stringToInsert) {
if (Strings.isEmptyOrNull(stringToInsert)) {
return s;
}
boolean found = false;
int startPos = 0;
while ((startPos < s.length()) && (!found)) {
int pos = s.indexOf(stringToInsert, startPos);
if (pos < 0) break;
startPos = pos + 1;
int before = pos - 1;
int after = pos + stringToInsert.length();
if (((pos == 0) || (Character.isWhitespace(s.charAt(before))))
&& ((after >= s.length()) || (Character.isWhitespace(s.charAt(after))))) found = true;
}
if (found) {
StringBuilder newText = new StringBuilder(s);
if (newText.lastIndexOf(SINGLE_SPACE) != newText.length() - 1) {
newText.append(SINGLE_SPACE);
}
return (newText.toString());
} else return (Strings.insertPadded(s, insertAt, stringToInsert));
}
/**
* Inserts a given string into another padding it with spaces. Is aware if the insertion point has
* a space on either end and does not add extra spaces.
*
* @param s the string to insert into
* @param insertAt the position to insert the string
* @param stringToInsert the string to insert
* @return the result of inserting the stringToInsert into the passed in string
* @throws IndexOutOfBoundsException if the insertAt is negative, or insertAt is larger than the
* length of s String object
*/
public static String insertPadded(String s, int insertAt, String stringToInsert) {
if (Strings.isEmptyOrNull(stringToInsert)) {
return s;
}
if (insertAt < 0) {
throw new IndexOutOfBoundsException(
"Invalid insertAt of [" + insertAt + "] for string [" + s + "]");
}
StringBuilder newText = new StringBuilder();
if (insertAt > 0) {
newText.append(s.substring(0, insertAt));
if (newText.lastIndexOf(SINGLE_SPACE) != newText.length() - 1) {
newText.append(SINGLE_SPACE);
}
newText.append(stringToInsert);
String postItem = s.substring(insertAt);
if (postItem.indexOf(SINGLE_SPACE) != 0) {
newText.append(SINGLE_SPACE);
}
newText.append(postItem);
} else {
newText.append(stringToInsert);
if (s.indexOf(SINGLE_SPACE) != 0) {
newText.append(SINGLE_SPACE);
}
newText.append(s);
}
return newText.toString();
}
