changeset:   263453:8abec78a074f
tag:         IZ234795
tag:         qbase
tag:         qtip
tag:         tip
user:        Andrew Krasny <akrasny@netbeans.org>
date:        Fri Sep 06 18:56:04 2013 +0400
summary:     Bug #234795 - Multiple tabs with the same code

diff --git a/openide.text/src/org/openide/text/EditorSupportLineSet.java b/openide.text/src/org/openide/text/EditorSupportLineSet.java
--- a/openide.text/src/org/openide/text/EditorSupportLineSet.java
+++ b/openide.text/src/org/openide/text/EditorSupportLineSet.java
@@ -44,11 +44,19 @@
 package org.openide.text;
 
 import java.lang.ref.Reference;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
 import java.util.*;
+import java.util.concurrent.atomic.AtomicReference;
 
 import javax.swing.event.*;
 import javax.swing.text.Position;
 import javax.swing.text.StyledDocument;
+import org.openide.util.Lookup;
+import org.openide.util.LookupEvent;
+import org.openide.util.LookupListener;
+import org.openide.windows.CloneableOpenSupport;
+import org.openide.windows.CloneableOpenSupportRedirector;
 
 
 /** Line set for an EditorSupport.
@@ -98,7 +106,7 @@
 
         @Deprecated
         public void show(int kind, int column) {
-            CloneableEditorSupport support = pos.getCloneableEditorSupport();
+            CloneableEditorSupport support = getCloneableEditorSupport(pos);
 
             if ((kind == SHOW_TRY_SHOW) && !support.isDocumentLoaded()) {
                 return;
@@ -119,8 +127,8 @@
         
         @Override
         public void show(ShowOpenType openType, ShowVisibilityType visibilityType, int column) {
-            CloneableEditorSupport support = pos.getCloneableEditorSupport();
-            
+            CloneableEditorSupport support = getCloneableEditorSupport(pos);
+
             if ((openType == ShowOpenType.NONE) && !support.isDocumentLoaded()) {
                 return;
             }
@@ -149,7 +157,7 @@
             DocumentLine.Part part = new DocumentLine.Part(
                     this,
                     new PositionRef(
-                        pos.getCloneableEditorSupport().getPositionManager(), pos.getOffset() + column,
+                            getCloneableEditorSupport(pos).getPositionManager(), pos.getOffset() + column,
                         Position.Bias.Forward
                     ), length
                 );
@@ -160,7 +168,7 @@
 
         @Override
         public String getDisplayName() {
-            CloneableEditorSupport support = pos.getCloneableEditorSupport();
+            CloneableEditorSupport support = getCloneableEditorSupport(pos);
 
             return support.messageLine(this);
         }
@@ -170,6 +178,10 @@
             return "SupportLine@" + Integer.toHexString(System.identityHashCode(this)) + " at line: " +
             getLineNumber(); // NOI18N
         }
+
+        private static CloneableEditorSupport getCloneableEditorSupport(final PositionRef pos) {
+            return CESHack.getCloneableEditorSupport(pos);
+        }
     }
 
     /** Line set for closed EditorSupport.
@@ -263,4 +275,69 @@
             }
         }
     }
+
+// <editor-fold defaultstate="collapsed" desc="CESHack">
+    private static final class CESHack {
+
+        private static final Method redirectMethod;
+        private static final Lookup.Result<CloneableOpenSupportRedirector> lkp;
+        private static final AtomicReference<Collection<? extends CloneableOpenSupportRedirector>> redirectors;
+        private static final LookupListener lkpListener;
+
+        static {
+            Method m = null;
+            try {
+                m = CloneableOpenSupportRedirector.class.getDeclaredMethod(
+                        "redirect",  // NOI18N
+                        new Class[]{CloneableOpenSupport.Env.class});
+                m.setAccessible(true);
+            } catch (NoSuchMethodException ex) {
+            } catch (SecurityException ex) {
+            } finally {
+                redirectMethod = m;
+            }
+
+            if (m != null) {
+                lkp = Lookup.getDefault().lookupResult(CloneableOpenSupportRedirector.class);
+                redirectors = new AtomicReference<Collection<? extends CloneableOpenSupportRedirector>>();
+                lkpListener = new LookupListener() {
+                    @Override
+                    public void resultChanged(LookupEvent ev) {
+                        redirectors.set(lkp.allInstances());
+                    }
+                };
+                lkp.addLookupListener(lkpListener);
+                lkpListener.resultChanged(null);
+            } else {
+                redirectors = null;
+                lkpListener = null;
+                lkp = null;
+            }
+        }
+
+        private static CloneableEditorSupport getCloneableEditorSupport(final PositionRef pos) {
+            final CloneableEditorSupport orig = pos.getCloneableEditorSupport();
+            if (orig == null || redirectMethod == null) {
+                return orig;
+            }
+            Collection<? extends CloneableOpenSupportRedirector> rlist = redirectors.get();
+            if (rlist != null) {
+                for (CloneableOpenSupportRedirector r : rlist) {
+                    try {
+                        Object result = redirectMethod.invoke(r, orig.cesEnv());
+                        if (result instanceof CloneableEditorSupport) {
+                            return (CloneableEditorSupport) result;
+                        }
+                    } catch (IllegalAccessException ex) {
+                    } catch (IllegalArgumentException ex) {
+                    } catch (SecurityException ex) {
+                    } catch (InvocationTargetException ex) {
+                    }
+                }
+            }
+
+            return orig;
+        }
+    }
+// </editor-fold>
 }