File indexing completed on 2024-05-19 05:41:39

 /*
     SPDX-FileCopyrightText: 2017 Sergio Martins <smartins@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "install-event-filter.h"
 #include "HierarchyUtils.h"
 #include "TypeUtils.h"
 #include "Utils.h"
 
 #include <clang/AST/Decl.h>
 #include <clang/AST/DeclCXX.h>
 #include <clang/AST/Expr.h>
 #include <clang/AST/ExprCXX.h>
 #include <clang/AST/Stmt.h>
 #include <clang/Basic/LLVM.h>
 #include <llvm/Support/Casting.h>
 
 class ClazyContext;
 
 using namespace clang;
 
 InstallEventFilter::InstallEventFilter(const std::string &name, ClazyContext *context)
     : CheckBase(name, context, Option_CanIgnoreIncludes)
 {
 }
 
 void InstallEventFilter::VisitStmt(clang::Stmt *stmt)
 {
     auto *memberCallExpr = dyn_cast<CXXMemberCallExpr>(stmt);
     if (!memberCallExpr || memberCallExpr->getNumArgs() != 1) {
         return;
     }
 
     FunctionDecl *func = memberCallExpr->getDirectCallee();
     if (!func || func->getQualifiedNameAsString() != "QObject::installEventFilter") {
         return;
     }
 
     Expr *expr = memberCallExpr->getImplicitObjectArgument();
     if (!expr) {
         return;
     }
 
     if (!isa<CXXThisExpr>(clazy::getFirstChildAtDepth(expr, 1))) {
         return;
     }
 
     Expr *arg1 = memberCallExpr->getArg(0);
     arg1 = arg1 ? arg1->IgnoreCasts() : nullptr;
 
     CXXRecordDecl *record = clazy::typeAsRecord(arg1);
     auto methods = Utils::methodsFromString(record, "eventFilter");
 
     for (auto *method : methods) {
         if (method->getQualifiedNameAsString() != "QObject::eventFilter") { // It overrides it, probably on purpose then, don't warn.
             return;
         }
     }
 
     emitWarning(stmt, "'this' should usually be the filter object, not the monitored one.");
 }