feat: implement trash empty state detection

1. Add isTrashEmpty() method to detect if trash is empty using gio
command
2. Modify context menu to disable "Clean Trash" option when trash is
empty
3. Update trash tip text generation to use new queryTrashCountAndEmpty
method
4. Add property binding to dynamically enable/disable menu items based
on trash state
5. Use gio trash --list command for more reliable trash content
detection

feat: 实现回收站空状态检测

1. 添加 isTrashEmpty() 方法使用 gio 命令检测回收站是否为空
2. 修改上下文菜单，在回收站为空时禁用"清空回收站"选项
3. 更新回收站提示文本生成以使用新的 queryTrashCountAndEmpty 方法
4. 添加属性绑定以根据回收站状态动态启用/禁用菜单项
5. 使用 gio trash --list 命令进行更可靠的回收站内容检测

PMS: BUG-335901

Author: wjyrich

panels/dock/taskmanager/package/AppItem.qml

@@ -137,13 +137,17 @@ Item {
         Loader {
             id: contextMenuLoader
             active: false
+            property bool trashEmpty: true
             sourceComponent: LP.Menu {
                 id: contextMenu
                 Instantiator {
                     id: menuItemInstantiator
                     model: JSON.parse(menus)
                     delegate: LP.MenuItem {
                         text: modelData.name
+                        enabled: (root.itemId === "dde-trash" && modelData.id === "clean-trash")
+                                ? !contextMenuLoader.trashEmpty
+                                : true
                         onTriggered: {
                             TaskManager.requestNewInstance(root.modelIndex, modelData.id);
                         }
@@ -319,6 +323,7 @@ Item {
         onClicked: function (mouse) {
             let index = root.modelIndex;
             if (mouse.button === Qt.RightButton) {
+                contextMenuLoader.trashEmpty = TaskManager.isTrashEmpty()
                 contextMenuLoader.active = true
                 MenuHelper.openMenu(contextMenuLoader.item)
             } else {

panels/dock/taskmanager/taskmanager.cpp

@@ -25,6 +25,7 @@
 #include <QStringLiteral>
 #include <QUrl>
 #include <QStandardPaths>
+#include <QProcess>
 
 #include <appletbridge.h>
 #include <DSGApplication>
@@ -436,16 +437,30 @@ void TaskManager::saveDockElementsOrder(const QStringList &appIds)
 
 QString TaskManager::getTrashTipText()
 {
-    int fileCount = 0;
-    QString trashPath = QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation) + "/Trash/files";
-    QDir trashDir(trashPath);
-    
-    if (trashDir.exists()) {
-        QStringList entries = trashDir.entryList(QDir::Files | QDir::Dirs | QDir::NoDotAndDotDot);
-        fileCount = entries.size();
-    }
+    const auto count = queryTrashCount();
+    return tr("%1 files").arg(count);
+}
+
+bool TaskManager::isTrashEmpty() const
+{
+    return queryTrashCount() == 0;
+}
 
-    return tr("%1 files").arg(fileCount);
+int TaskManager::queryTrashCount() const
+{
+    int count = 0;
+
+    QProcess gio;
+    gio.start("gio", QStringList() << "trash" << "--list");
+    if (gio.waitForFinished(1000) && gio.exitStatus() == QProcess::NormalExit && gio.exitCode() == 0) {
+        const QByteArray &out = gio.readAllStandardOutput();
+        const QList<QByteArray> lines = out.split('\n');
+        for (const QByteArray &l : lines) {
+            if (!l.trimmed().isEmpty()) count++;
+        }
+        return count;
+    }
+    return count;
 }
 
 void TaskManager::modifyOpacityChanged()

panels/dock/taskmanager/taskmanager.h

@@ -97,6 +97,7 @@ class TaskManager : public DS_NAMESPACE::DContainment, public AbstractTaskManage
     Q_INVOKABLE void saveDockElementsOrder(const QStringList &appIds);
     Q_INVOKABLE QString getTrashTipText();
 
+    Q_INVOKABLE bool isTrashEmpty() const;
 Q_SIGNALS:
     void dataModelChanged();
     void windowSplitChanged();
@@ -114,6 +115,7 @@ private Q_SLOTS:
     DockGlobalElementModel *m_dockGlobalElementModel = nullptr;
     DockItemModel *m_itemModel = nullptr;
     HoverPreviewProxyModel *m_hoverPreviewModel = nullptr;
+    int queryTrashCount() const;
 };
 
 }