Do not create an expandable hint wider than the screen bounds

platform/platform-api/src/com/intellij/ui/ScreenUtil.java

@@ -77,6 +77,39 @@ public class ScreenUtil {
     return area;
   }
 
+  /**
+   * Returns the smallest rectangle that encloses a visible area of every screen.
+   *
+   * @return the smallest rectangle that encloses a visible area of every screen
+   */
+  public static Rectangle getAllScreensRectangle() {
+    GraphicsDevice[] devices = GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices();
+    int minX = 0;
+    int maxX = 0;
+    int minY = 0;
+    int maxY = 0;
+    for (GraphicsDevice device : devices) {
+      Rectangle rectangle = getScreenRectangle(device);
+      int x = rectangle.x;
+      if (minX > x) {
+        minX = x;
+      }
+      x += rectangle.width;
+      if (maxX < x) {
+        maxX = x;
+      }
+      int y = rectangle.y;
+      if (minY > y) {
+        minY = y;
+      }
+      y += rectangle.height;
+      if (maxY < y) {
+        maxY = y;
+      }
+    }
+    return new Rectangle(minX, minY, maxX - minX, maxY - minY);
+  }
+
   public static Rectangle getScreenRectangle(@NotNull Point p) {
     return getScreenRectangle(p.x, p.y);
   }

platform/platform-impl/src/com/intellij/openapi/wm/impl/WindowManagerImpl.java

@@ -225,7 +225,7 @@ public final class WindowManagerImpl extends WindowManagerEx implements NamedCom
 
   @Override
   public final Rectangle getScreenBounds() {
-    return ScreenUtil.getAllScreensShape().getBounds();
+    return ScreenUtil.getAllScreensRectangle();
   }
 
   @Override

platform/platform-impl/src/com/intellij/ui/AbstractExpandableItemsHandler.java

@@ -301,10 +301,18 @@ public abstract class AbstractExpandableItemsHandler<KeyType, ComponentType exte
       hideHint();
     }
     else if (myPopup == null) {
-      showHint(location);
+      myPopup = new OurHeavyWeightPopup(myComponent, myTipComponent, location.x, location.y);
+      Window popupWindow = SwingUtilities.getWindowAncestor(myTipComponent);
+      WindowManagerEx.getInstanceEx().setWindowShadow(popupWindow, WindowManagerEx.WindowShadowMode.DISABLED);
+      myPopup.show();
+      repaintKeyItem();
     }
     else {
-      repaintHint(location);
+      Dimension size = myTipComponent.getPreferredSize();
+      Window popupWindow = SwingUtilities.getWindowAncestor(myTipComponent);
+      popupWindow.setBounds(location.x, location.y, size.width, size.height);
+      myTipComponent.repaint();
+      repaintKeyItem();
     }
   }
 
@@ -339,31 +347,6 @@ public abstract class AbstractExpandableItemsHandler<KeyType, ComponentType exte
     return myPopup != null;
   }
 
-  private void showHint(Point location) {
-    assert myPopup == null;
-
-    if (!myComponent.isShowing()) {
-      return;
-    }
-
-    SwingUtilities.convertPointToScreen(location, myComponent);
-    myPopup = new OurHeavyWeightPopup(myComponent, myTipComponent, location.x, location.y);
-    WindowManagerEx.getInstanceEx().setWindowShadow(SwingUtilities.getWindowAncestor(myTipComponent),
-                                                    WindowManagerEx.WindowShadowMode.DISABLED);
-    myPopup.show();
-
-    repaintKeyItem();
-  }
-
-  private void repaintHint(Point location) {
-    if (myPopup != null && myKey != null && myComponent.isShowing()) {
-      SwingUtilities.convertPointToScreen(location, myComponent);
-      SwingUtilities.getWindowAncestor(myTipComponent).setBounds(new Rectangle(location, myTipComponent.getPreferredSize()));
-      myTipComponent.repaint();
-      repaintKeyItem();
-    }
-  }
-
   private void repaintKeyItem() {
     if (myKeyItemBounds != null) {
       myComponent.repaint(myKeyItemBounds);
@@ -380,20 +363,29 @@ public abstract class AbstractExpandableItemsHandler<KeyType, ComponentType exte
 
     myKeyItemBounds = rendererAndBounds.second;
 
-    Point toolTipLocationOnScreen = myKeyItemBounds.getLocation();
-    SwingUtilities.convertPointToScreen(toolTipLocationOnScreen, myComponent);
-    int maximumWidth = Math.max(0, myComponent.getToolkit().getScreenSize().width - toolTipLocationOnScreen.x);
-    myKeyItemBounds.width = Math.min(myKeyItemBounds.width, maximumWidth);
-
     Rectangle cellBounds = myKeyItemBounds;
     Rectangle visibleRect = getVisibleRect(key);
 
-    int width = cellBounds.x + cellBounds.width - (visibleRect.x + visibleRect.width);
+    if (cellBounds.y < visibleRect.y) return null;
+
+    int cellMaxY = cellBounds.y + cellBounds.height;
+    int visMaxY = visibleRect.y + visibleRect.height;
+    if (cellMaxY > visMaxY) return null;
+
+    int cellMaxX = cellBounds.x + cellBounds.width;
+    int visMaxX = visibleRect.x + visibleRect.width;
+
+    Point location = new Point(visMaxX, cellBounds.y);
+    SwingUtilities.convertPointToScreen(location, myComponent);
+
+    Rectangle screen = !Registry.is("ide.expansion.hints.on.all.screens")
+                       ? ScreenUtil.getScreenRectangle(location)
+                       : ScreenUtil.getAllScreensRectangle();
+
+    int width = Math.min(screen.width + screen.x - location.x, cellMaxX - visMaxX);
     int height = cellBounds.height;
 
     if (width <= 0 || height <= 0) return null;
-    if (cellBounds.y < visibleRect.y) return null;
-    if (cellBounds.y + cellBounds.height > visibleRect.y + visibleRect.height) return null;
 
     Dimension size = getImageSize(width, height);
     myImage = UIUtil.createImage(size.width, size.height, BufferedImage.TYPE_INT_RGB);
@@ -401,10 +393,9 @@ public abstract class AbstractExpandableItemsHandler<KeyType, ComponentType exte
     Graphics2D g = myImage.createGraphics();
     g.setClip(null);
     doFillBackground(height, width, g);
-    g.translate(-(visibleRect.x + visibleRect.width - cellBounds.x), 0);
+    g.translate(cellBounds.x - visMaxX, 0);
     doPaintTooltipImage(renderer, cellBounds, g, key);
 
-    Point location = new Point(visibleRect.x + visibleRect.width, cellBounds.y);
     CustomLineBorder border = null;
     if (isPaintBorder()) {
       border = new CustomLineBorder(getBorderColor(), 1, 0, 1, 1);

platform/util/resources/misc/registry.properties

@@ -121,6 +121,7 @@ ide.tooltip.autoDismissDeadZone=300
 ide.balloon.shadowEnabled=true
 ide.balloon.shadow.size=15
 ide.expansion.hints.enabled=true
+ide.expansion.hints.on.all.screens=false
 ide.register.bundled.fonts=true
 ide.register.bundled.fonts.description=Disables automatic registration of bundled fonts: SourceCodePro, Inconsolata