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

@@ -446,9 +446,13 @@ 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::")) {
@@ -674,34 +678,19 @@ bool DEnumerator::hasNext() const
 
     while (!d->stackEnumerator.isEmpty()) {
         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);
+        // 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) {
+            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);
 
-        if (hasNext) {
-            if (!gfileInfo || !gfile) {
-                // 当前枚举器已完成，弹出并继续下一个
-                GFileEnumerator *enumeratorPop = d->stackEnumerator.pop();
-                g_object_unref(enumeratorPop);
-                continue;
-            }
 
-            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,
-                                                                 d->enumLinks ? DFileInfo::FileQueryInfoFlags::kTypeNone : DFileInfo::FileQueryInfoFlags::kTypeNoFollowSymlinks);
+            g_object_unref(nextInfo);
 
             // 如果是目录且需要遍历子目录
             if (d->enumSubDir && d->dfileInfoNext && d->dfileInfoNext->attribute(DFileInfo::AttributeID::kStandardIsDir).toBool()) {
@@ -720,9 +709,12 @@ bool DEnumerator::hasNext() const
             return true;
         }
 
+        // nextInfo == NULL: either finished or an error occurred
         if (gerror) {
             d->setErrorFromGError(gerror);
-            return false;
+            d->nextUrl = QUrl();
+            d->dfileInfoNext.reset();
+            return true;
         }
 
         // 当前枚举器已完成，弹出并继续下一个