perf(frontend):优化内存占用，清除最佳匹配停止搜索时的缓存.

frontend/control/stack-pages/search-page-section.cpp

@@ -467,6 +467,7 @@ void ResultArea::initConnections()
         m_selectedPluginID = "";
         m_isClicked = false;
     });
+    connect(this, &ResultArea::stopSearch, m_bestListWidget, &BestListWidget::stopSearch);
     connect(m_bestListWidget, &BestListWidget::sizeChanged, this, &ResultArea::onWidgetSizeChanged);
     connect(m_bestListWidget, &BestListWidget::sizeChanged, this, [=] () {
         QModelIndex index = m_bestListWidget->getModlIndex(0, 0);

frontend/model/best-list-model.cpp

@@ -218,3 +218,15 @@ bool BestListModel::setData(const QModelIndex &index, const QVariant &value, int
     }
     return false;
 }
+
+void BestListModel::stopSearchSlot() {
+    beginResetModel();
+    qDeleteAll(m_items);
+    m_pluginIdList.clear();
+    m_resourceTypes.clear();
+    m_items.clear();
+    m_items.squeeze();
+    endResetModel();
+    Q_EMIT this->itemListChanged(m_items.length());
+//    Q_EMIT stopSearch();
+}

frontend/model/best-list-model.h

@@ -53,6 +53,7 @@ public Q_SLOTS:
     void removeInfo(const QString &);
     void moveInfo(const QString &pluginName, int pos);
     void startSearch(const QString &);
+    void stopSearchSlot();
 
 Q_SIGNALS:
     void stopSearch();

frontend/view/best-list-view.cpp

@@ -273,6 +273,7 @@ void BestListView::initConnections()
         m_model->startSearch(keyword);
     });
     connect(this, &BestListView::startSearch, m_model, &BestListModel::startSearch);
+    connect(this, &BestListView::stopSearch, m_model, &BestListModel::stopSearchSlot);
     connect(this, &BestListView::clicked, this, &BestListView::onRowSelectedSlot);
     connect(this, &BestListView::activated, this, &BestListView::onRowDoubleClickedSlot);
     connect(m_model, &BestListModel::itemListChanged, this, &BestListView::onItemListChanged);
@@ -418,6 +419,7 @@ void BestListWidget::initUi()
 void BestListWidget::initConnections()
 {
     connect(this, &BestListWidget::startSearch, m_bestListView, &BestListView::startSearch);
+    connect(this, &BestListWidget::stopSearch, m_bestListView, &BestListView::stopSearch);
     connect(this, &BestListWidget::startSearch, m_titleLabel, &TitleLabel::startSearch);
     connect(this, &BestListWidget::startSearch, m_titleLabel, &TitleLabel::startSearch);
     connect(this, &BestListWidget::stopSearch, m_titleLabel, &TitleLabel::stopSearch);

frontend/view/best-list-view.h

@@ -73,6 +73,7 @@ private:
 
 Q_SIGNALS:
     void startSearch(const QString &);
+    void stopSearch();
     void currentRowChanged(const QString &, const SearchPluginIface::ResultInfo&);
     void sendBestListData(const QString &, const SearchPluginIface::ResultInfo&);
     void listLengthChanged(const int &);