Fix: [file-enumerator] use g_file_enumerator_next_file()

    --Replace use of g_file_enumerator_iterate() with g_file_enumerator_next_file()
    in DEnumerator::hasNext() so the enumerator's internal cursor is advanced by
    GIO and error/end conditions are handled unambiguously.

    --Using g_file_enumerator_next_file() yields clearer semantics: non-NULL -> next entry,
    NULL + NULL error -> end, NULL + non-NULL error -> error. This avoids premature termination
    caused by backend-specific iterate() quirks.

    --Construct next entry URL via the existing buildUrl(...) helper and preserve
    existing logic that creates the DFileInfo from the returned GFileInfo. Preserve
    existing error handling and d->checkFilter() behavior and recursive skipping of filtered entries.

    --Fix URL construction so joining directory path and filename does not introduce
    an extra '/' (previously produced e.g. .../vault_unlocked//file). The logic now
    concatenates carefully (handles root path and trailing slashes) to avoid duplicate separators.

Log: fix issue
Bug: https://pms.uniontech.com//bug-view-351177.html

Author: GongHeng2017

src/dfm-io/dfm-io/denumerator.cpp

@@ -377,9 +377,14 @@ char *DEnumeratorPrivate::filePath(const QUrl &url)
 
 QUrl DEnumeratorPrivate::buildUrl(const QUrl &url, const char *fileName)
 {
-    auto path = url.path()  == "/" ?
-                "/" + QString(fileName) :
-                url.path() + "/" + QString(fileName);
+    QString path;
+    if (url.path() == "/") {
+        path = "/" + QString(fileName);
+    } else {
+        QString dirPath = url.path();
+        path = dirPath.endsWith('/') ? dirPath + QString(fileName) : dirPath + "/" + QString(fileName);
+    }
+
     QUrl nextUrl = QUrl::fromLocalFile(path);
 
     if (url.userInfo().startsWith("originPath::")) {
@@ -618,41 +623,32 @@ bool DEnumerator::hasNext() const
 
     GFileEnumerator *enumerator = d->stackEnumerator.top();
 
-    GFileInfo *gfileInfo = nullptr;
-    GFile *gfile = nullptr;
-
     g_autoptr(GError) gerror = nullptr;
     d->checkAndResetCancel();
-    bool hasNext = g_file_enumerator_iterate(enumerator, &gfileInfo, &gfile, d->cancellable, &gerror);
-    if (hasNext) {
-        if (!gfileInfo || !gfile) {
-            GFileEnumerator *enumeratorPop = d->stackEnumerator.pop();
-            g_object_unref(enumeratorPop);
-            return this->hasNext();
-        }
 
-        g_autofree gchar *path = g_file_get_path(gfile);
-        if (path) {
-            d->nextUrl = QUrl::fromLocalFile(QString::fromLocal8Bit(path));
-            if (DFMUtils::isInvalidCodecByPath(path))
-                d->nextUrl.setUserInfo(QString::fromLatin1("originPath::") + QString::fromLatin1(path));
-        } else {
-            g_autofree gchar *uri = g_file_get_uri(gfile);
-            d->nextUrl = QUrl(QString::fromLocal8Bit(uri));
-            if (DFMUtils::isInvalidCodecByPath(uri))
-                d->nextUrl.setUserInfo(QString::fromLatin1("originPath::") + QString::fromLatin1(path));
-        }
-        d->dfileInfoNext = DLocalHelper::createFileInfoByUri(d->nextUrl, g_file_info_dup(gfileInfo), FILE_DEFAULT_ATTRIBUTES,
+    // Use g_file_enumerator_next_file() which returns a GFileInfo* for the next
+    // entry (or NULL). This avoids ambiguous iterate() behavior across backends.
+    GFileInfo *nextInfo = g_file_enumerator_next_file(enumerator, d->cancellable, &gerror);
+    if (nextInfo) {
+        // Build URL from the name field (nextInfo may not include a GFile)
+        d->nextUrl = d->buildUrl(d->uri, g_file_info_get_name(nextInfo));
+
+        d->dfileInfoNext = DLocalHelper::createFileInfoByUri(d->nextUrl, g_file_info_dup(nextInfo), FILE_DEFAULT_ATTRIBUTES,
                                                              d->enumLinks ? DFileInfo::FileQueryInfoFlags::kTypeNone : DFileInfo::FileQueryInfoFlags::kTypeNoFollowSymlinks);
 
+        g_object_unref(nextInfo);
+
         if (!d->checkFilter())
             return this->hasNext();
 
         return true;
     }
 
-    if (gerror)
+    // nextInfo == NULL: either finished or an error occurred
+    if (gerror) {
         d->setErrorFromGError(gerror);
+        return true;
+    }
 
     return false;
 }