fix(ui): contact list optimization

src/model/friendlist/friendlistmanager.cpp

@@ -20,9 +20,9 @@
 #include "friendlistmanager.h"
 #include "src/widget/genericchatroomwidget.h"
 
-FriendListManager::FriendListManager(QObject *parent) : QObject(parent)
+FriendListManager::FriendListManager(int countContacts, QObject *parent) : QObject(parent)
 {
-
+    this->countContacts = countContacts;
 }
 
 QVector<FriendListManager::IFriendListItemPtr> FriendListManager::getItems() const
@@ -35,6 +35,11 @@ bool FriendListManager::needHideCircles() const
     return hideCircles;
 }
 
+bool FriendListManager::getPositionsChanged() const
+{
+    return positionsChanged;
+}
+
 void FriendListManager::addFriendListItem(IFriendListItem *item)
 {
     if (item->isGroup()) {
@@ -44,15 +49,16 @@ void FriendListManager::addFriendListItem(IFriendListItem *item)
         items.push_back(IFriendListItemPtr(item));
     }
 
-    updatePositions();
-    emit itemsChanged();
+    if (countContacts <= items.size()) {
+        countContacts = 0;
+        setSortRequired();
+    }
 }
 
 void FriendListManager::removeFriendListItem(IFriendListItem *item)
 {
     removeAll(item);
-    updatePositions();
-    emit itemsChanged();
+    setSortRequired();
 }
 
 void FriendListManager::sortByName()
@@ -87,7 +93,7 @@ void FriendListManager::setFilter(const QString &searchString, bool hideOnline,
     filterParams.hideOffline = hideOffline;
     filterParams.hideGroups = hideGroups;
 
-    emit itemsChanged();
+    setSortRequired();
 }
 
 void FriendListManager::applyFilter()
@@ -126,19 +132,40 @@ void FriendListManager::applyFilter()
 
 void FriendListManager::updatePositions()
 {
+    positionsChanged = true;
+
     if (byName) {
-        std::sort(items.begin(), items.end(),
-            [&](const IFriendListItemPtr &a, const IFriendListItemPtr &b) {
-                return cmpByName(a, b, groupsOnTop);
+        auto sortName = [&](const IFriendListItemPtr &a, const IFriendListItemPtr &b) {
+                            return cmpByName(a, b, groupsOnTop);
+                        };
+        if (!needSort) {
+            if (std::is_sorted(items.begin(), items.end(), sortName)) {
+                positionsChanged = false;
+                return;
             }
-        );
+        }
+        std::sort(items.begin(), items.end(),sortName);
+
     } else {
-        std::sort(items.begin(), items.end(),
-            [&](const IFriendListItemPtr &a, const IFriendListItemPtr &b) {
-                return cmpByActivity(a, b);
+        auto sortActivity = [&](const IFriendListItemPtr &a, const IFriendListItemPtr &b) {
+                                return cmpByActivity(a, b);
+                            };
+        if (!needSort) {
+            if (std::is_sorted(items.begin(), items.end(), sortActivity)) {
+                positionsChanged = false;
+                return;
             }
-        );
+        }
+        std::sort(items.begin(), items.end(), sortActivity);
     }
+
+    needSort = false;
+}
+
+void FriendListManager::setSortRequired()
+{
+    needSort = true;
+    emit itemsChanged();
 }
 
 void FriendListManager::setGroupsOnTop(bool v)

src/model/friendlist/friendlistmanager.h

@@ -32,10 +32,12 @@ class FriendListManager : public QObject
 public:
     using IFriendListItemPtr = std::shared_ptr<IFriendListItem>;
 
-    explicit FriendListManager(QObject *parent = nullptr);
+    explicit FriendListManager(int countContacts, QObject *parent = nullptr);
 
     QVector<IFriendListItemPtr> getItems() const;
     bool needHideCircles() const;
+    // If the contact positions have changed, need to redraw view
+    bool getPositionsChanged() const;
 
     void addFriendListItem(IFriendListItem* item);
     void removeFriendListItem(IFriendListItem* item);
@@ -45,7 +47,8 @@ public:
     void setFilter(const QString& searchString, bool hideOnline,
                    bool hideOffline, bool hideGroups);
     void applyFilter();
-    void updatePositions();    
+    void updatePositions();
+    void setSortRequired();
 
     void setGroupsOnTop(bool v);
 
@@ -67,6 +70,10 @@ private:
     bool byName = true;
     bool hideCircles = false;
     bool groupsOnTop;
+    bool positionsChanged;
+    bool needSort;
     QVector<IFriendListItemPtr> items;
+    // At startup, while the size of items is less than countContacts, the view will not be processed to improve performance
+    int countContacts;
 
 };

src/widget/friendlistwidget.cpp

@@ -101,7 +101,8 @@ FriendListWidget::FriendListWidget(const Core &_core, Widget* parent, bool group
     : QWidget(parent)
     , core{_core}
 {
-    manager = new FriendListManager(this);
+    int countContacts = core.getFriendList().size();
+    manager = new FriendListManager(countContacts, this);
     manager->setGroupsOnTop(groupsOnTop);
     connect(manager, &FriendListManager::itemsChanged, this, &FriendListWidget::itemsChanged);
 
@@ -137,15 +138,18 @@ void FriendListWidget::setMode(SortingMode mode)
     this->mode = mode;
     Settings::getInstance().setFriendSortingMode(mode);
 
-    sortByMode(mode);
+    manager->setSortRequired();
 }
 
 void FriendListWidget::sortByMode(SortingMode mode)
 {
-    cleanMainLayout();
-
     if (mode == SortingMode::Name) {
         manager->sortByName();
+        if (!manager->getPositionsChanged()) {
+            return;
+        }
+
+        cleanMainLayout();
 
         for (int i = 0; i < Settings::getInstance().getCircleCount(); ++i) {
             addCircleWidget(i);
@@ -202,6 +206,13 @@ void FriendListWidget::sortByMode(SortingMode mode)
             }
         }
     } else if (mode == SortingMode::Activity) {
+
+        manager->sortByActivity();
+        if (!manager->getPositionsChanged()) {
+            return;
+        }
+        cleanMainLayout();
+
         QLocale ql(Settings::getInstance().getTranslation());
         QDate today = QDate::currentDate();
 #define COMMENT "Category for sorting friends by activity"
@@ -222,7 +233,6 @@ void FriendListWidget::sortByMode(SortingMode mode)
 // clang-format on
 #undef COMMENT
 
-        manager->sortByActivity();
         QVector<std::shared_ptr<IFriendListItem>> itemsTmp = manager->getItems();
 
         for (int i = 0; i < itemsTmp.size(); ++i) {
@@ -386,9 +396,9 @@ void FriendListWidget::addCircleWidget(FriendWidget* friendWidget)
 
         if (window()->isActiveWindow())
             circleWidget->editName();
-    }
 
-    itemsChanged();
+        manager->setSortRequired();
+    }
 }
 
 void FriendListWidget::removeCircleWidget(CircleWidget* widget)
@@ -412,7 +422,7 @@ void FriendListWidget::renameCircleWidget(CircleWidget* circleWidget, const QStr
     circleWidget->setName(newName);
 
     if (mode == SortingMode::Name) {
-        itemsChanged();
+        manager->setSortRequired();
     }
 }
 
@@ -423,7 +433,6 @@ void FriendListWidget::onGroupchatPositionChanged(bool top)
     if (mode != SortingMode::Name)
         return;
 
-    manager->updatePositions();
     itemsChanged();
 }
 
@@ -559,10 +568,12 @@ void FriendListWidget::moveWidget(FriendWidget* widget, Status::Status s, bool a
         CircleWidget* circleWidget = CircleWidget::getFromID(circleId);
 
         if (circleWidget == nullptr || add) {
-            if (circleId != -1)
+            if (circleId != -1) {
                 Settings::getInstance().setFriendCircleID(f->getPublicKey(), -1);
-
-            itemsChanged();
+                manager->setSortRequired();
+            } else {
+                itemsChanged();
+            }
             return;
         }