diff --git a/src/dbus/applicationservice.cpp b/src/dbus/applicationservice.cpp
index 9f3f58c..381e26f 100644
--- a/src/dbus/applicationservice.cpp
+++ b/src/dbus/applicationservice.cpp
@@ -909,105 +909,8 @@ std::optional<QStringList> ApplicationService::unescapeExecArgs(const QString &s
 LaunchTask ApplicationService::unescapeExec(const QString &str, const QStringList &fields) noexcept
 {
     LaunchTask task;
+    auto opt = unescapeExecArgs(str);
 
-    QString content = str;
-    QRegularExpression re{"%[fFuUickdDnNvm]"};
-    QStringList list = re.match(str).capturedTexts();
-    if (list.count() == 1) {
-        char fieldCode = list.first().back().toLatin1();
-        QString codeStr = QString(R"(%%1)").arg(fieldCode);
-        switch (fieldCode) {
-        case 'f': {  // Defer to async job
-            for (const auto &field : fields) {
-                task.Resources.emplace_back(field);
-            }
-        } break;
-        case 'u': {
-            if (fields.empty()) {
-                content.replace(codeStr, "");
-                break;
-            }
-            if (fields.count() > 1) {
-                qDebug() << R"(fields count is greater than one, %u will only take first element.)";
-            }
-            content.replace(codeStr, fields.first());
-        } break;
-        case 'F': {
-            QStringList result;
-            for (const auto &field : fields) {
-                auto tmp = QUrl{field};
-                if (auto scheme = tmp.scheme(); scheme.startsWith("file") or scheme.isEmpty()) {
-                    result.append(tmp.toLocalFile());
-                } else {
-                    qWarning() << "shouldn't replace %F with an URL:" << field;
-                    result.append(field);
-                }
-            }
-            content.replace(codeStr, result.join(" "));
-        } break;
-        case 'U': {
-            content.replace(codeStr, fields.join(" "));
-        } break;
-        case 'i': {
-            auto val = m_entry->value(DesktopFileEntryKey, "Icon");
-            if (!val) {
-                qDebug() << R"(Application Icons can't be found. %i will be ignored.)";
-                content.replace(codeStr, "");
-                break;
-            }
-
-            auto iconStr = toIconString(val.value());
-            if (iconStr.isEmpty()) {
-                qDebug() << R"(Icons Convert to string failed. %i will be ignored.)";
-                content.replace(codeStr, "");
-                break;
-            }
-            content.replace(codeStr, QString("--icon") + " " + iconStr);
-        } break;
-        case 'c': {
-            auto val = m_entry->value(DesktopFileEntryKey, "Name");
-            if (!val) {
-                qDebug() << R"(Application Name can't be found. %c will be ignored.)";
-                content.replace(codeStr, "");
-                break;
-            }
-
-            const auto &rawValue = val.value();
-            if (!rawValue.canConvert<QStringMap>()) {
-                qDebug() << "Name's underlying type mismatch:" << "QStringMap" << rawValue.metaType().name();
-                content.replace(codeStr, "");
-                break;
-            }
-
-            auto NameStr = toLocaleString(rawValue.value<QStringMap>(), getUserLocale());
-            if (NameStr.isEmpty()) {
-                qDebug() << R"(Name Convert to locale string failed. %c will be ignored.)";
-                content.replace(codeStr, "");
-                break;
-            }
-            content.replace(codeStr, NameStr);
-        } break;
-        case 'k': {  // ignore all desktop file location for now.
-        } break;
-        case 'd':
-        case 'D':
-        case 'n':
-        case 'N':
-        case 'v':
-            [[fallthrough]];  // Deprecated field codes should be removed from the command line and ignored.
-        case 'm': {
-        } break;
-        default: {
-            qDebug() << "unrecognized file code.";
-        }
-        }
-    } else if (list.count() > 1) {
-        for (const auto &code : list) {
-            content.remove(code);
-        }
-    }
-
-    auto opt = unescapeExecArgs(content);
     if (!opt.has_value()) {
         qWarning() << "unescapeExecArgs failed.";
         return {};
@@ -1020,7 +923,134 @@ LaunchTask ApplicationService::unescapeExec(const QString &str, const QStringLis
     }
 
     task.LaunchBin = execList.first();
-    task.command.append(std::move(execList));
+    QRegularExpression re{"%[fFuUickdDnNvm]"};
+    auto matcher = re.match(str);
+    if (!matcher.hasMatch()) {
+        task.command.append(std::move(execList));
+        task.Resources.emplace_back(QString{""});  // mapReduce should run once at least
+        return task;
+    }
+
+    auto list = matcher.capturedTexts();
+    if (list.count() != 1) {
+        qWarning() << "invalid exec format, all filed code will be ignored.";
+        for (const auto &code : list) {
+            execList.removeOne(code);
+        }
+        task.command.append(std::move(execList));
+        return task;
+    }
+
+    auto filesCode = list.first().back().toLatin1();
+    auto codeStr = QString(R"(%%1)").arg(filesCode);
+    auto location = execList.indexOf(codeStr);
+
+    switch (filesCode) {
+    case 'f': {  // Defer to async job
+        task.command.append(std::move(execList));
+        for (const auto &field : fields) {
+            task.Resources.emplace_back(field);
+        }
+    } break;
+    case 'u': {
+        execList.removeAt(location);
+        if (fields.empty()) {
+            task.command.append(execList);
+            break;
+        }
+        if (fields.count() > 1) {
+            qDebug() << R"(fields count is greater than one, %u will only take first element.)";
+        }
+        execList.insert(location, fields.first());
+        task.command.append(execList);
+    } break;
+    case 'F': {
+        execList.remove(location);
+        auto it = execList.begin() + location;
+        for (const auto &field : fields) {
+            auto tmp = QUrl::fromUserInput(field);
+            if (auto scheme = tmp.scheme(); scheme.startsWith("file") or scheme.isEmpty()) {
+                it = execList.insert(it, tmp.toLocalFile());
+            } else {
+                qWarning() << "shouldn't replace %F with an URL:" << field;
+                it = execList.insert(it, field);
+            }
+            ++it;
+        }
+        task.command.append(std::move(execList));
+    } break;
+    case 'U': {
+        execList.removeAt(location);
+        auto it = execList.begin() + location;
+        for (const auto &field : fields) {
+            it = execList.insert(it, field);
+            ++it;
+        }
+        task.command.append(std::move(execList));
+    } break;
+    case 'i': {
+        execList.removeAt(location);
+        auto val = m_entry->value(DesktopFileEntryKey, "Icon");
+        if (!val) {
+            qDebug() << R"(Application Icons can't be found. %i will be ignored.)";
+            task.command.append(std::move(execList));
+            return task;
+        }
+
+        auto iconStr = toIconString(val.value());
+        if (iconStr.isEmpty()) {
+            qDebug() << R"(Icons Convert to string failed. %i will be ignored.)";
+            task.command.append(std::move(execList));
+            return task;
+        }
+        auto it = execList.insert(location, iconStr);
+        execList.insert(it, "--icon");
+        task.command.append(std::move(execList));
+    } break;
+    case 'c': {
+        execList.removeAt(location);
+        auto val = m_entry->value(DesktopFileEntryKey, "Name");
+        if (!val) {
+            qDebug() << R"(Application Name can't be found. %c will be ignored.)";
+            task.command.append(std::move(execList));
+            return task;
+        }
+
+        const auto &rawValue = val.value();
+        if (!rawValue.canConvert<QStringMap>()) {
+            qDebug() << "Name's underlying type mismatch:"
+                     << "QStringMap" << rawValue.metaType().name();
+            task.command.append(std::move(execList));
+            return task;
+        }
+
+        auto NameStr = toLocaleString(rawValue.value<QStringMap>(), getUserLocale());
+        if (NameStr.isEmpty()) {
+            qDebug() << R"(Name Convert to locale string failed. %c will be ignored.)";
+            task.command.append(std::move(execList));
+            return task;
+        }
+        execList.insert(location, NameStr);
+        task.command.append(std::move(execList));
+    } break;
+    case 'k': {  // ignore all desktop file location for now.
+        execList.removeAt(location);
+        task.command.append(std::move(execList));
+    } break;
+    case 'd':
+    case 'D':
+    case 'n':
+    case 'N':
+    case 'v':
+        [[fallthrough]];  // Deprecated field codes should be removed from the command line and ignored.
+    case 'm': {
+        execList.removeAt(location);
+        task.command.append(std::move(execList));
+    } break;
+    default: {
+        qDebug() << "unrecognized file code.";
+    }
+    }
 
     if (task.Resources.isEmpty()) {
         task.Resources.emplace_back(QString{""});  // mapReduce should run once at least