IDEA-326402 Fix scrolling tab issues and add delay 5 sec for relayout tabs (move to selected tab)

GitOrigin-RevId: e625d1bd9eab3eac5e60b932e9e7865bbe1d38c2

platform/platform-api/src/com/intellij/ui/components/DefaultScrollBarUI.java

@@ -460,6 +460,7 @@ class DefaultScrollBarUI extends ScrollBarUI {
     public void mouseReleased(MouseEvent event) {
       if (isDragging) updateMouse(event.getX(), event.getY());
       if (myScrollBar == null || !myScrollBar.isEnabled()) return;
+      myScrollBar.setValueIsAdjusting(false);
       if (redispatchIfTrackNotClickable(event)) return;
       if (SwingUtilities.isRightMouseButton(event)) return;
       isDragging = false;
@@ -467,7 +468,6 @@ class DefaultScrollBarUI extends ScrollBarUI {
       myScrollTimer.stop();
       isValueCached = true;
       myCachedValue = myScrollBar.getValue();
-      myScrollBar.setValueIsAdjusting(false);
       repaint();
     }
 

platform/platform-api/src/com/intellij/ui/tabs/impl/JBTabsImpl.kt

@@ -154,6 +154,8 @@ open class JBTabsImpl(
     }
   }
 
+  private final val RELAYOUT_DELAY = 5000
+
   private val visibleInfos = ArrayList<TabInfo>()
   private val infoToPage = HashMap<TabInfo, AccessibleTabPage>()
   private val hiddenInfos = HashMap<TabInfo, Int>()
@@ -393,6 +395,8 @@ open class JBTabsImpl(
     scrollBarChangeListener = ChangeListener { updateTabsOffsetFromScrollBar() }
   }
 
+  fun isScrollBarAdjusting(): Boolean = scrollBar.valueIsAdjusting
+
   private fun addMouseMotionAwtListener(parentDisposable: Disposable) {
     StartupUiUtil.addAwtListener(object : AWTEventListener {
       val afterScroll = Alarm(parentDisposable)
@@ -419,7 +423,7 @@ open class JBTabsImpl(
                                    if (!isMouseInsideTabsArea) {
                                      relayout(false, false)
                                    }
-                                 }, 500)
+                                 }, RELAYOUT_DELAY)
         }
       }
     }, AWTEvent.MOUSE_MOTION_EVENT_MASK, parentDisposable)
@@ -539,8 +543,10 @@ open class JBTabsImpl(
   fun unHover(label: TabLabel) {
     if (tabLabelAtMouse === label) {
       tabLabelAtMouse = null
-      label.revalidate()
-      label.repaint()
+      Alarm().addRequest({
+                           label.revalidate()
+                           label.repaint()
+                         }, RELAYOUT_DELAY)
     }
   }
 

platform/platform-api/src/com/intellij/ui/tabs/impl/multiRow/ScrollableMultiRowLayout.kt

@@ -11,7 +11,7 @@ class ScrollableMultiRowLayout(tabs: JBTabsImpl,
   private var scrollOffset: Int = 0
 
   override fun layoutTable(visibleInfos: List<TabInfo>): LayoutPassInfo {
-    if (!tabs.isMouseInsideTabsArea && !tabs.isHideTabs) {
+    if (!tabs.isMouseInsideTabsArea && !tabs.isHideTabs && !tabs.isScrollBarAdjusting()) {
       scrollToSelectedTab()
     }
     return super.layoutTable(visibleInfos)

platform/platform-api/src/com/intellij/ui/tabs/impl/singleRow/ScrollableSingleRowLayout.java

@@ -62,7 +62,7 @@ public final class ScrollableSingleRowLayout extends SingleRowLayout {
   }
 
   private void doScrollToSelectedTab(SingleRowPassInfo passInfo) {
-    if (myTabs.isMouseInsideTabsArea()) {
+    if (myTabs.isMouseInsideTabsArea() || myTabs.isScrollBarAdjusting()) {
       return;
     }
     int offset = -myScrollOffset;