/**
* We want to treat comments specially in a way to skip comment prefix on line indent calculation.
*
* <p>Example:
*
* <pre>
* if (true) {
* int i1;
* // int i2;
* int i3;
* }
* </pre>
*
* We want to use 'int i2;' start offset as the third line indent (though it has non-white space
* comment prefix (//) at the first column.
*
* <p>This method tries to parse comment prefix for the language implied by the given comment
* type. It uses {@link #NO_COMMENT_INFO_MARKER} as an indicator that that information is
* unavailable
*
* @param commentType target comment type
* @return prefix of the comment denoted by the given type if any; {@link #NO_COMMENT_INFO_MARKER}
* otherwise
*/
@NotNull
private static String getCommentPrefix(@NotNull IElementType commentType) {
Commenter c = LanguageCommenters.INSTANCE.forLanguage(commentType.getLanguage());
if (!(c instanceof CodeDocumentationAwareCommenter)) {
COMMENT_PREFIXES.put(commentType, NO_COMMENT_INFO_MARKER);
return NO_COMMENT_INFO_MARKER;
}
CodeDocumentationAwareCommenter commenter = (CodeDocumentationAwareCommenter) c;
IElementType lineCommentType = commenter.getLineCommentTokenType();
String lineCommentPrefix = commenter.getLineCommentPrefix();
if (lineCommentType != null) {
COMMENT_PREFIXES.put(
lineCommentType, lineCommentPrefix == null ? NO_COMMENT_INFO_MARKER : lineCommentPrefix);
}
IElementType blockCommentType = commenter.getBlockCommentTokenType();
String blockCommentPrefix = commenter.getBlockCommentPrefix();
if (blockCommentType != null) {
COMMENT_PREFIXES.put(
blockCommentType,
blockCommentPrefix == null ? NO_COMMENT_INFO_MARKER : blockCommentPrefix);
}
IElementType docCommentType = commenter.getDocumentationCommentTokenType();
String docCommentPrefix = commenter.getDocumentationCommentPrefix();
if (docCommentType != null) {
COMMENT_PREFIXES.put(
docCommentType, docCommentPrefix == null ? NO_COMMENT_INFO_MARKER : docCommentPrefix);
}
COMMENT_PREFIXES.putIfAbsent(commentType, NO_COMMENT_INFO_MARKER);
return COMMENT_PREFIXES.get(commentType);
}
private boolean insertDocAsterisk(
int lineStart,
boolean docAsterisk,
boolean previousLineIndentUsed,
CodeDocumentationAwareCommenter commenter) {
PsiElement atLineStart = myFile.findElementAt(lineStart);
if (atLineStart == null) return false;
final String linePrefix = commenter.getDocumentationCommentLinePrefix();
final String docPrefix = commenter.getDocumentationCommentPrefix();
final String text = atLineStart.getText();
final TextRange textRange = atLineStart.getTextRange();
if (text.equals(linePrefix)
|| text.equals(docPrefix)
|| docPrefix != null
&& text.regionMatches(
lineStart - textRange.getStartOffset(), docPrefix, 0, docPrefix.length())
|| linePrefix != null
&& text.regionMatches(
lineStart - textRange.getStartOffset(), linePrefix, 0, linePrefix.length())) {
PsiElement element = myFile.findElementAt(myOffset);
if (element == null) return false;
PsiComment comment =
element instanceof PsiComment
? (PsiComment) element
: PsiTreeUtil.getParentOfType(element, PsiComment.class, false);
if (comment != null) {
int commentEnd = comment.getTextRange().getEndOffset();
if (myOffset >= commentEnd) {
docAsterisk = false;
} else {
removeTrailingSpaces(myDocument, myOffset);
String toInsert =
previousLineIndentUsed
? "*"
: CodeDocumentationUtil.createDocCommentLine("", getProject(), commenter);
myDocument.insertString(myOffset, toInsert);
PsiDocumentManager.getInstance(getProject()).commitAllDocuments();
}
} else {
docAsterisk = false;
}
} else if (linePrefix != null
&& atLineStart instanceof PsiComment
&& ((PsiComment) atLineStart).getTokenType() == commenter.getBlockCommentTokenType()) {
// Check if C-Style comment already uses asterisks.
boolean usesAstersk = false;
int commentLine = myDocument.getLineNumber(textRange.getStartOffset());
if (commentLine < myDocument.getLineCount() - 1 && textRange.getEndOffset() >= myOffset) {
int nextLineOffset = myDocument.getLineStartOffset(commentLine + 1);
if (nextLineOffset < textRange.getEndOffset()) {
final CharSequence chars = myDocument.getCharsSequence();
nextLineOffset = CharArrayUtil.shiftForward(chars, nextLineOffset, " \t");
usesAstersk = CharArrayUtil.regionMatches(chars, nextLineOffset, linePrefix);
}
}
if (usesAstersk) {
removeTrailingSpaces(myDocument, myOffset);
myDocument.insertString(myOffset, linePrefix + " ");
PsiDocumentManager.getInstance(getProject()).commitAllDocuments();
}
docAsterisk = usesAstersk;
} else {
docAsterisk = false;
}
return docAsterisk;
}
private static boolean isCommentComplete(
PsiComment comment, CodeDocumentationAwareCommenter commenter, Editor editor) {
for (CommentCompleteHandler handler :
Extensions.getExtensions(CommentCompleteHandler.EP_NAME)) {
if (handler.isApplicable(comment, commenter)) {
return handler.isCommentComplete(comment, commenter, editor);
}
}
String commentText = comment.getText();
final boolean docComment = isDocComment(comment, commenter);
final String expectedCommentEnd =
docComment ? commenter.getDocumentationCommentSuffix() : commenter.getBlockCommentSuffix();
if (!commentText.endsWith(expectedCommentEnd)) return false;
final PsiFile containingFile = comment.getContainingFile();
final Language language = containingFile.getLanguage();
ParserDefinition parserDefinition = LanguageParserDefinitions.INSTANCE.forLanguage(language);
if (parserDefinition == null) {
return true;
}
Lexer lexer = parserDefinition.createLexer(containingFile.getProject());
final String commentPrefix =
docComment ? commenter.getDocumentationCommentPrefix() : commenter.getBlockCommentPrefix();
lexer.start(
commentText, commentPrefix == null ? 0 : commentPrefix.length(), commentText.length());
QuoteHandler fileTypeHandler = TypedHandler.getQuoteHandler(containingFile, editor);
JavaLikeQuoteHandler javaLikeQuoteHandler =
fileTypeHandler instanceof JavaLikeQuoteHandler
? (JavaLikeQuoteHandler) fileTypeHandler
: null;
while (true) {
IElementType tokenType = lexer.getTokenType();
if (tokenType == null) {
return false;
}
if (javaLikeQuoteHandler != null
&& javaLikeQuoteHandler.getStringTokenTypes() != null
&& javaLikeQuoteHandler.getStringTokenTypes().contains(tokenType)) {
String text = commentText.substring(lexer.getTokenStart(), lexer.getTokenEnd());
int endOffset = comment.getTextRange().getEndOffset();
if (text.endsWith(expectedCommentEnd)
&& endOffset < containingFile.getTextLength()
&& containingFile.getText().charAt(endOffset) == '\n') {
return true;
}
}
if (tokenType == commenter.getDocumentationCommentTokenType()
|| tokenType == commenter.getBlockCommentTokenType()) {
return false;
}
if (tokenType == commenter.getLineCommentTokenType()
&& lexer.getTokenText().contains(commentPrefix)) {
return false;
}
if (lexer.getTokenEnd() == commentText.length()) {
if (tokenType == commenter.getLineCommentTokenType()) {
String prefix = commenter.getLineCommentPrefix();
lexer.start(
commentText,
lexer.getTokenStart() + (prefix == null ? 0 : prefix.length()),
commentText.length());
lexer.advance();
continue;
} else if (isInvalidPsi(comment)) {
return false;
}
return true;
}
lexer.advance();
}
}