private void doIndentCommenting(Commenter commenter) {
CharSequence chars = myDocument.getCharsSequence();
final FileType fileType = myFile.getFileType();
Indent minIndent =
computeMinIndent(myStartLine, myEndLine, chars, myCodeStyleManager, fileType);
for (int line = myEndLine; line >= myStartLine; line--) {
int lineStart = myDocument.getLineStartOffset(line);
int offset = lineStart;
final StringBuilder buffer = StringBuilderSpinAllocator.alloc();
try {
while (true) {
String space = buffer.toString();
Indent indent = myCodeStyleManager.getIndent(space, fileType);
if (indent.isGreaterThan(minIndent) || indent.equals(minIndent)) break;
char c = chars.charAt(offset);
if (c != ' ' && c != '\t') {
String newSpace = myCodeStyleManager.fillIndent(minIndent, fileType);
myDocument.replaceString(lineStart, offset, newSpace);
offset = lineStart + newSpace.length();
break;
}
buffer.append(c);
offset++;
}
} finally {
StringBuilderSpinAllocator.dispose(buffer);
}
commentLine(line, offset, commenter);
}
}
private Indent computeMinIndent(
int line1,
int line2,
CharSequence chars,
CodeStyleManager codeStyleManager,
FileType fileType) {
Indent minIndent = CommentUtil.getMinLineIndent(myProject, myDocument, line1, line2, fileType);
if (line1 > 0) {
int commentOffset = getCommentStart(line1 - 1);
if (commentOffset >= 0) {
int lineStart = myDocument.getLineStartOffset(line1 - 1);
String space = chars.subSequence(lineStart, commentOffset).toString();
Indent indent = codeStyleManager.getIndent(space, fileType);
minIndent = minIndent != null ? indent.min(minIndent) : indent;
}
}
if (minIndent == null) {
minIndent = codeStyleManager.zeroIndent();
}
return minIndent;
}