/**
* 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);
}
@Override
public Result preprocessEnter(
@NotNull final PsiFile file,
@NotNull final Editor editor,
@NotNull final Ref<Integer> caretOffsetRef,
@NotNull final Ref<Integer> caretAdvance,
@NotNull final DataContext dataContext,
final EditorActionHandler originalHandler) {
int caretOffset = caretOffsetRef.get().intValue();
PsiElement psiAtOffset = file.findElementAt(caretOffset);
if (psiAtOffset != null && psiAtOffset.getTextOffset() < caretOffset) {
ASTNode token = psiAtOffset.getNode();
Document document = editor.getDocument();
CharSequence text = document.getText();
final Language language = psiAtOffset.getLanguage();
final Commenter languageCommenter = LanguageCommenters.INSTANCE.forLanguage(language);
final CodeDocumentationAwareCommenter commenter =
languageCommenter instanceof CodeDocumentationAwareCommenter
? (CodeDocumentationAwareCommenter) languageCommenter
: null;
if (commenter != null && token.getElementType() == commenter.getLineCommentTokenType()) {
final int offset = CharArrayUtil.shiftForward(text, caretOffset, " \t");
if (offset < document.getTextLength() && text.charAt(offset) != '\n') {
String prefix = commenter.getLineCommentPrefix();
assert prefix != null : "Line Comment type is set but Line Comment Prefix is null!";
if (!StringUtil.startsWith(text, offset, prefix)) {
if (text.charAt(caretOffset) != ' ' && !prefix.endsWith(" ")) {
prefix += " ";
}
document.insertString(caretOffset, prefix);
return Result.Default;
} else {
int afterPrefix = offset + prefix.length();
if (afterPrefix < document.getTextLength() && text.charAt(afterPrefix) != ' ') {
document.insertString(afterPrefix, " ");
// caretAdvance.set(0);
}
caretOffsetRef.set(offset);
}
return Result.Default;
}
}
}
return Result.Continue;
}
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();
}
}
