public static void replaceWhiteSpace(
final String whiteSpace,
final ASTNode leafElement,
final IElementType whiteSpaceToken,
@Nullable final TextRange textRange) {
final CharTable charTable = SharedImplUtil.findCharTableByTree(leafElement);
ASTNode treePrev = findPreviousWhiteSpace(leafElement, whiteSpaceToken);
if (treePrev == null) {
treePrev = getWsCandidate(leafElement);
}
if (treePrev != null
&& treePrev.getText().trim().isEmpty()
&& treePrev.getElementType() != whiteSpaceToken
&& treePrev.getTextLength() > 0
&& !whiteSpace.isEmpty()) {
LeafElement whiteSpaceElement =
Factory.createSingleLeafElement(
treePrev.getElementType(),
whiteSpace,
charTable,
SharedImplUtil.getManagerByTree(leafElement));
ASTNode treeParent = treePrev.getTreeParent();
treeParent.replaceChild(treePrev, whiteSpaceElement);
} else {
LeafElement whiteSpaceElement =
Factory.createSingleLeafElement(
whiteSpaceToken, whiteSpace, charTable, SharedImplUtil.getManagerByTree(leafElement));
if (treePrev == null) {
if (!whiteSpace.isEmpty()) {
addWhiteSpace(leafElement, whiteSpaceElement);
}
} else {
if (!(treePrev.getElementType() == whiteSpaceToken)) {
if (!whiteSpace.isEmpty()) {
addWhiteSpace(treePrev, whiteSpaceElement);
}
} else {
if (treePrev.getElementType() == whiteSpaceToken) {
final CompositeElement treeParent = (CompositeElement) treePrev.getTreeParent();
if (!whiteSpace.isEmpty()) {
// LOG.assertTrue(textRange == null ||
// treeParent.getTextRange().equals(textRange));
treeParent.replaceChild(treePrev, whiteSpaceElement);
} else {
treeParent.removeChild(treePrev);
}
// There is a possible case that more than one PSI element is matched by the target text
// range.
// That is the case, for example, for Python's multi-line expression. It may looks like
// below:
// import contextlib,\
// math, decimal
// Here single range contains two blocks: '\' & '\n '. So, we may want to replace that
// range to another text, hence,
// we replace last element located there with it ('\n ') and want to remove any
// remaining elements ('\').
ASTNode removeCandidate = findPreviousWhiteSpace(whiteSpaceElement, whiteSpaceToken);
while (textRange != null
&& removeCandidate != null
&& removeCandidate.getStartOffset() >= textRange.getStartOffset()) {
treePrev = findPreviousWhiteSpace(removeCandidate, whiteSpaceToken);
removeCandidate.getTreeParent().removeChild(removeCandidate);
removeCandidate = treePrev;
}
// treeParent.subtreeChanged();
}
}
}
}
}
