IDEA-72676 (access SynthUI via reflection for JDK7 compatibility)

platform/platform-impl/src/com/intellij/ui/plaf/gtk/GtkMenuItemUI.java

@@ -18,7 +18,6 @@ package com.intellij.ui.plaf.gtk;
 import com.intellij.openapi.actionSystem.impl.ActionMenuItem;
 import com.intellij.util.ui.EmptyIcon;
 import com.intellij.util.ui.UIUtil;
-import sun.swing.plaf.synth.SynthUI;
 
 import javax.swing.*;
 import javax.swing.plaf.MenuItemUI;
@@ -38,7 +37,7 @@ public class GtkMenuItemUI extends BasicMenuItemUI {
   }
 
   public static boolean isUiAcceptable(final MenuItemUI ui) {
-    return ui instanceof BasicMenuItemUI && ui instanceof SynthUI;
+    return ui instanceof BasicMenuItemUI && GtkPaintingUtil.isSynthUI(ui);
   }
 
   @Override
@@ -63,7 +62,7 @@ public class GtkMenuItemUI extends BasicMenuItemUI {
 
   private static Icon getCheckIconFromContext(final BasicMenuItemUI originalUI, final JCheckBoxMenuItem item) {
     if (myCachedCheckIcon == null) {
-      final SynthContext context = ((SynthUI)originalUI).getContext(item);
+      final SynthContext context = GtkPaintingUtil.getSynthContext(originalUI, item);
       myCachedCheckIcon = context.getStyle().getIcon(context, "CheckBoxMenuItem.checkIcon");
     }
     return myCachedCheckIcon;
@@ -89,7 +88,7 @@ public class GtkMenuItemUI extends BasicMenuItemUI {
       disabledForeground = fg;
     }
     if (checkIcon != null && !(checkIcon instanceof IconWrapper) && !(checkIcon instanceof EmptyIcon)) {
-      checkIcon = new IconWrapper(checkIcon, (SynthUI)myOriginalUI);
+      checkIcon = new IconWrapper(checkIcon, myOriginalUI);
     }
 
     super.update(g, c);

platform/platform-impl/src/com/intellij/ui/plaf/gtk/GtkMenuUI.java

@@ -16,7 +16,6 @@
 package com.intellij.ui.plaf.gtk;
 
 import com.intellij.util.ui.UIUtil;
-import sun.swing.plaf.synth.SynthUI;
 
 import javax.swing.*;
 import javax.swing.plaf.MenuItemUI;
@@ -32,7 +31,7 @@ public class GtkMenuUI extends BasicMenuUI {
   }
 
   public static boolean isUiAcceptable(final MenuItemUI ui) {
-    return ui instanceof BasicMenuUI && ui instanceof SynthUI;
+    return ui instanceof BasicMenuUI && GtkPaintingUtil.isSynthUI(ui);
   }
 
   @Override
@@ -47,7 +46,7 @@ public class GtkMenuUI extends BasicMenuUI {
   @Override
   public void update(final Graphics g, final JComponent c) {
     if (arrowIcon != null && !(arrowIcon instanceof IconWrapper)) {
-      arrowIcon = new IconWrapper(arrowIcon, (SynthUI)myOriginalUI);
+      arrowIcon = new IconWrapper(arrowIcon, myOriginalUI);
     }
     super.update(g, c);
   }

platform/platform-impl/src/com/intellij/ui/plaf/gtk/GtkPaintingUtil.java

@@ -17,19 +17,24 @@ package com.intellij.ui.plaf.gtk;
 
 import com.intellij.util.ui.UIUtil;
 import sun.swing.SwingUtilities2;
-import sun.swing.plaf.synth.SynthUI;
 
 import javax.swing.*;
+import javax.swing.plaf.MenuItemUI;
 import javax.swing.plaf.basic.BasicMenuItemUI;
 import javax.swing.plaf.synth.ColorType;
 import javax.swing.plaf.synth.SynthContext;
 import java.awt.*;
+import java.lang.reflect.Method;
 
+// todo[r.sh] get rid of SynthUI reflection after migration to JDK 7
 public class GtkPaintingUtil {
+  private static final String V6_SYNTH_UI_CLASS = "sun.swing.plaf.synth.SynthUI";
+  private static final String V7_SYNTH_UI_CLASS = "javax.swing.plaf.synth.SynthUI";
+
   private GtkPaintingUtil() { }
 
   public static Color getForeground(final BasicMenuItemUI ui, final JMenuItem menuItem) {
-    final SynthContext context = ((SynthUI)ui).getContext(menuItem);
+    final SynthContext context = getSynthContext(ui, menuItem);
     return context.getStyle().getColor(context, ColorType.TEXT_FOREGROUND);
   }
 
@@ -49,4 +54,27 @@ public class GtkPaintingUtil {
     g.setColor(fg);
     SwingUtilities2.drawStringUnderlineCharAt(menuItem, g, text, index, textRect.x, textRect.y + fm.getAscent());
   }
+
+  public static boolean isSynthUI(final MenuItemUI ui) {
+    final Class<?>[] interfaces = ui.getClass().getInterfaces();
+    for (int i = 0, length = interfaces.length; i < length; i++) {
+      final Class<?> anInterface = interfaces[i];
+      if (V6_SYNTH_UI_CLASS.equals(anInterface.getName()) || V7_SYNTH_UI_CLASS.equals(anInterface.getName())) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  public static SynthContext getSynthContext(final MenuItemUI ui, final JComponent item) {
+    try {
+      final Method getContext = ui.getClass().getMethod("getContext", JComponent.class);
+      getContext.setAccessible(true);
+      return (SynthContext)getContext.invoke(ui, item);
+    }
+    catch (Exception e) {
+      throw new RuntimeException(e);
+    }
+  }
 }

platform/platform-impl/src/com/intellij/ui/plaf/gtk/IconWrapper.java

@@ -15,18 +15,17 @@
  */
 package com.intellij.ui.plaf.gtk;
 
-import sun.swing.plaf.synth.SynthUI;
-
 import javax.swing.*;
+import javax.swing.plaf.MenuItemUI;
 import javax.swing.plaf.synth.SynthContext;
 import java.awt.*;
 import java.lang.reflect.Method;
 
 public class IconWrapper implements Icon {
   private final Icon myIcon;
-  private final SynthUI myOriginalUI;
+  private final MenuItemUI myOriginalUI;
 
-  public IconWrapper(final Icon icon, final SynthUI originalUI) {
+  public IconWrapper(final Icon icon, final MenuItemUI originalUI) {
     myIcon = icon;
     myOriginalUI = originalUI;
   }
@@ -37,7 +36,7 @@ public class IconWrapper implements Icon {
       final Method paintIcon = myIcon.getClass().getMethod("paintIcon", SynthContext.class, Graphics.class,
                                                            int.class, int.class, int.class, int.class);
       paintIcon.setAccessible(true);
-      paintIcon.invoke(myIcon, myOriginalUI.getContext((JComponent)c), g, x, y, getIconWidth(), getIconHeight());
+      paintIcon.invoke(myIcon, GtkPaintingUtil.getSynthContext(myOriginalUI, (JComponent)c), g, x, y, getIconWidth(), getIconHeight());
       return;
     }
     catch (Exception ignore) { }