protected boolean handleBackspace(
Editor editor, Caret caret, DataContext dataContext, boolean toWordStart) {
Project project = CommonDataKeys.PROJECT.getData(dataContext);
if (project == null) return false;
PsiFile file = PsiUtilBase.getPsiFileInEditor(editor, project);
if (file == null) return false;
if (editor.getSelectionModel().hasSelection()) return false;
int offset = editor.getCaretModel().getOffset() - 1;
if (offset < 0) return false;
CharSequence chars = editor.getDocument().getCharsSequence();
char c = chars.charAt(offset);
final Editor injectedEditor =
TypedHandler.injectedEditorIfCharTypedIsSignificant(c, editor, file);
final Editor originalEditor = editor;
if (injectedEditor != editor) {
int injectedOffset = injectedEditor.getCaretModel().getOffset();
if (isOffsetInsideInjected(injectedEditor, injectedOffset)) {
file = PsiDocumentManager.getInstance(project).getPsiFile(injectedEditor.getDocument());
editor = injectedEditor;
offset = injectedOffset - 1;
}
}
final BackspaceHandlerDelegate[] delegates =
Extensions.getExtensions(BackspaceHandlerDelegate.EP_NAME);
if (!toWordStart) {
for (BackspaceHandlerDelegate delegate : delegates) {
delegate.beforeCharDeleted(c, file, editor);
}
}
FileType fileType = file.getFileType();
final QuoteHandler quoteHandler = TypedHandler.getQuoteHandler(file, editor);
HighlighterIterator hiterator = ((EditorEx) editor).getHighlighter().createIterator(offset);
boolean wasClosingQuote =
quoteHandler != null && quoteHandler.isClosingQuote(hiterator, offset);
myOriginalHandler.execute(originalEditor, caret, dataContext);
if (!toWordStart) {
for (BackspaceHandlerDelegate delegate : delegates) {
if (delegate.charDeleted(c, file, editor)) {
return true;
}
}
}
if (offset >= editor.getDocument().getTextLength()) return true;
chars = editor.getDocument().getCharsSequence();
if ((c == '(' || c == '[' || c == '{')
&& CodeInsightSettings.getInstance().AUTOINSERT_PAIR_BRACKET) {
char c1 = chars.charAt(offset);
if (c1 != getRightChar(c)) return true;
HighlighterIterator iterator = ((EditorEx) editor).getHighlighter().createIterator(offset);
BraceMatcher braceMatcher = BraceMatchingUtil.getBraceMatcher(fileType, iterator);
if (!braceMatcher.isLBraceToken(iterator, chars, fileType)
&& !braceMatcher.isRBraceToken(iterator, chars, fileType)) {
return true;
}
int rparenOffset =
BraceMatchingUtil.findRightmostRParen(iterator, iterator.getTokenType(), chars, fileType);
if (rparenOffset >= 0) {
iterator = ((EditorEx) editor).getHighlighter().createIterator(rparenOffset);
boolean matched = BraceMatchingUtil.matchBrace(chars, fileType, iterator, false);
if (matched) return true;
}
editor.getDocument().deleteString(offset, offset + 1);
} else if ((c == '"' || c == '\'' || c == '`')
&& CodeInsightSettings.getInstance().AUTOINSERT_PAIR_QUOTE) {
char c1 = chars.charAt(offset);
if (c1 != c) return true;
if (wasClosingQuote) return true;
HighlighterIterator iterator = ((EditorEx) editor).getHighlighter().createIterator(offset);
if (quoteHandler == null || !quoteHandler.isOpeningQuote(iterator, offset)) return true;
editor.getDocument().deleteString(offset, offset + 1);
}
return true;
}
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();
}
}