/**
* Compute a region that represents the portion of the string literal between the opening and
* closing quotes.
*
* @param nodeStart the index of the first character of the string literal
* @param nodeLength the length of the string literal (including quotes)
* @return the region that was computed
*/
private IRegion computeInternalStringRegion(int nodeStart, int nodeLength) {
int start = nodeStart;
int end = nodeStart + nodeLength - 1;
try {
String source = compilationUnit.getBuffer().getContents();
if (source.charAt(start) == '@') {
start++;
}
if (source.charAt(start) == '\'') {
while (source.charAt(start) == '\'') {
start++;
}
while (source.charAt(end) == '\'') {
end--;
}
} else {
while (source.charAt(start) == '"') {
start++;
}
while (source.charAt(end) == '"') {
end--;
}
}
} catch (DartModelException exception) {
}
if (start >= end) {
return new Region(nodeStart, nodeLength);
}
return new Region(start, end - start + 1);
}
/**
* Return the existing document for the given compilation unit, or a DocumentAdapter if none.
*
* @return the existing document for the given compilation unit
*/
protected IDocument getDocument(CompilationUnit cu) throws DartModelException {
Buffer buffer = cu.getBuffer();
if (buffer instanceof IDocument) {
return (IDocument) buffer;
}
return new DocumentAdapter(buffer);
}
/**
* Compute a region representing the portion of the source containing a binary operator.
*
* @param left the index of the first character to the right of the left operand
* @param right the index of the first character to the left of the right operand
* @return the region that was computed
*/
private IRegion computeOperatorRegion(int left, int right) {
int start = left;
int end = right;
try {
String source = compilationUnit.getBuffer().getContents();
// TODO(brianwilkerson) This doesn't handle comments that occur between left and right, but
// should.
while (Character.isWhitespace(source.charAt(start))) {
start++;
}
while (Character.isWhitespace(source.charAt(end))) {
end--;
}
} catch (DartModelException exception) {
}
if (start > end) {
return new Region(left, right - left + 1);
}
return new Region(start, end - start + 1);
}