/**
* Returns a list of {@link VarComment}s within a specified start and end offsets.
*
* @param comments A sorted list of comments
* @param start
* @param end
*/
public static List<VarComment> findTypedVarComments(List<Comment> comments, int start, int end) {
List<VarComment> result = new LinkedList<VarComment>();
// locate the last comment in the given list and create a result list from all the VarComments
// on top of it,
// till we hit the start offset.
// We use a linked list to append comments at the start of the result with better performance.
int commentIndex = findUpperComment(comments, end);
if (commentIndex < 0) {
// The nearest comment we found should always have a negative value, as it should never
// overlap with the
// given offset
commentIndex = -commentIndex - 1;
}
if (commentIndex >= comments.size()) {
// off bounds
return result;
}
for (; commentIndex > -1; commentIndex--) {
Comment comment = comments.get(commentIndex);
if (comment.getStart() < start) {
break;
}
if (comment instanceof VarComment) {
result.add(0, (VarComment) comment);
}
}
return result;
}
private Collection<Task> processCommentNode(
final Program program,
final String source,
final boolean isCaseSensitive,
final Collection<TaskTag> tags,
final Comment commentNode) {
Collection<Task> tasks = new ArrayList<Task>();
// Explicitly make copies of substrings here and with message to avoid holding ref to underlying
// char[] for
// entire source string (or full line for message)!
String text = new String(source.substring(commentNode.getStart(), commentNode.getEnd() + 1));
if (!isCaseSensitive) {
text = text.toLowerCase();
}
int offset = 0;
String[] lines = NEWLINE_SPLIT.split(text);
for (String line : lines) {
for (TaskTag entry : tags) {
String tag = entry.getName();
if (!isCaseSensitive) {
tag = tag.toLowerCase();
}
int index = line.indexOf(tag);
if (index == -1) {
continue;
}
String message = line.substring(index).trim();
// Remove "**/" from the end of the line!
if (message.endsWith("**/")) // $NON-NLS-1$
{
message = message.substring(0, message.length() - 3).trim();
}
// Remove "*/" from the end of the line!
if (message.endsWith("*/")) // $NON-NLS-1$
{
message = message.substring(0, message.length() - 2).trim();
}
int start = commentNode.getStart() + offset + index;
tasks.add(
new Task(
entry.getName(),
new String(message),
entry.getPriority(),
start,
start + line.length() - index,
program.getLineNumber(start)));
}
// FIXME If newline is \r\n, this means we're one off per line in our offsets...
offset += line.length() + 1;
}
return tasks;
}
/** Perform a binary search for a comment that appears right on top of the given offset */
private static int findUpperComment(List<Comment> comments, int offset) {
int low = 0;
int high = comments.size() - 1;
while (low <= high) {
int mid = (low + high) >>> 1;
Comment midVal = (Comment) comments.get(mid);
int cmp = midVal.getStart() - offset;
if (cmp < 0) {
low = mid + 1;
} else if (cmp > 0) {
high = mid - 1;
} else {
return mid; // key found
}
}
return -low; // key not found.
}
/**
* Locate a comment that appears right above the given index (separated only with whitespace
* chars).
*
* @param comments
* @param offset
* @param content
* @param type The comment's type (e.g. Comment.TYPE_PHPDOC, Comment.TYPE_PHPDOC,
* Comment.TYPE_SINGLE_LINE). -1 for any type.
* @return A comment, or null if none was found.
*/
public static Comment getCommentByType(
List<Comment> comments, int offset, String content, int type) {
if (comments == null || comments.isEmpty()) {
return null;
}
Comment nearestComment = null;
int commentIndex = findUpperComment(comments, offset);
if (commentIndex < 0) {
// The nearest comment we found should always have a negative value, as it should never
// overlap with the
// given offset
nearestComment = comments.get(-commentIndex - 1);
}
if (nearestComment == null) {
return null;
}
if (type != -1 && (nearestComment.getCommentType() & type) == 0) {
return null;
}
if (content != null) {
// checking if we have anything but whitespace between comment end and
// offset
if (offset - 2 < 0
|| nearestComment.getEnd() >= content.length()
|| offset - 2 >= content.length()) {
return null;
}
// checking if we have anything but white spaces between comment end and offset
for (int i = nearestComment.getEnd() + 1; i < offset - 1; i++) {
char ch = content.charAt(i);
if (!Character.isWhitespace(ch)) {
return null;
}
}
}
return nearestComment;
}
/**
* Performs a binary search for a specific comment.
*
* @return The index of the comment that holds the offset; In case no such comment exists, the
* return value will be <code>(-(insertion point) - 1)</code>. The insertion point is defined
* as the point at which a comment would be inserted into the list in case it was matching the
* offset.
*/
public static int findComment(List<Comment> comments, int offset) {
int low = 0;
int high = comments.size() - 1;
while (low <= high) {
int mid = (low + high) >> 1;
Comment midVal = comments.get(mid);
int cmp;
if (offset >= midVal.getStart() && offset < midVal.getEnd()) {
return mid; // Found the comment!
}
cmp = midVal.getStart() - offset;
if (cmp < 0) {
low = mid + 1;
} else if (cmp > 0) {
high = mid - 1;
}
}
return -(low + 1); // Can't find a match
}
