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Some work on rewriting conditionals.

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This commit is contained in:
Roberto Raggi
2009-06-09 14:50:32 +02:00
parent 132258753a
commit 769d6282bd
1 changed files with 76 additions and 10 deletions
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86
src/plugins/cpptools/cpptoolseditorsupport.cpp
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@@ -111,6 +111,47 @@ public:
}
};
class RewriteConditional: public QuickFixOperation
{
QString _source;
BinaryExpressionAST *_binaryExpression;
public:
RewriteConditional(const QString &source, BinaryExpressionAST *node,
Document::Ptr doc, const Snapshot &snapshot)
: QuickFixOperation(doc, snapshot),
_source(source),
_binaryExpression(node)
{ }
virtual QString description() const
{ return QString::fromUtf8("Rewrite conditional (%1)").arg(_source.simplified()); }
virtual void apply(QTextCursor tc)
{
setTextCursor(tc);
tc.beginEditBlock();
UnaryExpressionAST *left_unary_expr = _binaryExpression->left_expression->asUnaryExpression();
UnaryExpressionAST *right_unary_expr = _binaryExpression->right_expression->asUnaryExpression();
QTextCursor left_not_op = cursor(left_unary_expr->unary_op_token);
QTextCursor right_not_op = cursor(right_unary_expr->unary_op_token);
QTextCursor log_and_op = cursor(_binaryExpression->binary_op_token);
QTextCursor begin_of_expr = moveAtStartOfToken(_binaryExpression->firstToken());
QTextCursor end_of_expr = moveAtEndOfToken(_binaryExpression->lastToken() - 1);
left_not_op.removeSelectedText();
right_not_op.removeSelectedText();
log_and_op.insertText(QLatin1String("||"));
begin_of_expr.insertText(QLatin1String("!("));
end_of_expr.insertText(QLatin1String(")"));
tc.endEditBlock();
}
};
class CheckDocument: protected ASTVisitor
{
QTextCursor _textCursor;
@@ -154,23 +195,48 @@ protected:
return true;
}
/*
virtual bool visit(ForStatementAST *ast)
QTextCursor moveAtStartOfToken(unsigned index) const
{
if (! checkPosition(ast))
return true;
unsigned line, col;
getTokenStartPosition(index, &line, &col);
QTextCursor tc = _textCursor;
tc.setPosition(tc.document()->findBlockByNumber(line - 1).position() + col - 1);
return tc;
}
if (ast->initializer && ast->initializer->asDeclarationStatement() != 0) {
if (checkPosition(ast->initializer)) {
// move initializer
_nodes.append(ast);
QTextCursor moveAtEndOfToken(unsigned index) const
{
const Token &tk = tokenAt(index);
unsigned line, col;
getTokenStartPosition(index, &line, &col);
QTextCursor tc = _textCursor;
tc.setPosition(tc.document()->findBlockByNumber(line - 1).position() + col + tk.length - 1);
return tc;
}
virtual bool visit(BinaryExpressionAST *ast)
{
if (ast->left_expression && ast->right_expression && tokenKind(ast->binary_op_token) == T_AMPER_AMPER &&
checkPosition(ast)) {
UnaryExpressionAST *left_unary_expr = ast->left_expression->asUnaryExpression();
UnaryExpressionAST *right_unary_expr = ast->right_expression->asUnaryExpression();
if (left_unary_expr && left_unary_expr->expression && tokenKind(left_unary_expr->unary_op_token) == T_NOT &&
right_unary_expr && right_unary_expr->expression && tokenKind(right_unary_expr->unary_op_token) == T_NOT) {
// replace !a && !b with !(a || b)
QTextCursor beg = moveAtStartOfToken(ast->firstToken());
QTextCursor end = moveAtEndOfToken(ast->lastToken() - 1);
beg.setPosition(end.position(), QTextCursor::KeepAnchor);
QString source = beg.selectedText();
QuickFixOperationPtr op(new RewriteConditional(source, ast, _doc, _snapshot));
_quickFixes.append(op);
return true;
}
}
return true;
}
*/
virtual bool visit(CastExpressionAST *ast)
{