private boolean isLineCommented(
final int line, final CharSequence chars, final Commenter commenter) {
boolean commented;
int lineEndForBlockCommenting = -1;
int lineStart = myDocument.getLineStartOffset(line);
lineStart = CharArrayUtil.shiftForward(chars, lineStart, " \t");
if (commenter instanceof SelfManagingCommenter) {
final SelfManagingCommenter selfManagingCommenter = (SelfManagingCommenter) commenter;
commented =
selfManagingCommenter.isLineCommented(
line, lineStart, myDocument, myCommenterStateMap.get(selfManagingCommenter));
} else {
String prefix = commenter.getLineCommentPrefix();
if (prefix != null) {
commented =
CharArrayUtil.regionMatches(chars, lineStart, prefix)
|| prefix.endsWith(" ")
&& CharArrayUtil.regionMatches(chars, lineStart, prefix.trim() + "\n");
} else {
prefix = commenter.getBlockCommentPrefix();
String suffix = commenter.getBlockCommentSuffix();
final int textLength = myDocument.getTextLength();
lineEndForBlockCommenting = myDocument.getLineEndOffset(line);
if (lineEndForBlockCommenting == textLength) {
final int shifted = CharArrayUtil.shiftBackward(chars, textLength - 1, " \t");
if (shifted < textLength - 1) lineEndForBlockCommenting = shifted;
} else {
lineEndForBlockCommenting =
CharArrayUtil.shiftBackward(chars, lineEndForBlockCommenting, " \t");
}
commented =
lineStart == lineEndForBlockCommenting && myStartLine != myEndLine
|| CharArrayUtil.regionMatches(chars, lineStart, prefix)
&& CharArrayUtil.regionMatches(
chars, lineEndForBlockCommenting - suffix.length(), suffix);
}
}
if (commented) {
myStartOffsets[line - myStartLine] = lineStart;
myEndOffsets[line - myStartLine] = lineEndForBlockCommenting;
}
return commented;
}
