From 0a668ab6fef458c973e58806daecc61ac2bcd474 Mon Sep 17 00:00:00 2001
From: Dmitry Jemerov <yole@jetbrains.com>
Date: Wed, 9 May 2012 19:08:55 +0200
Subject: [PATCH] core implementation of VirtualFilePointerManager

---
 .../com/intellij/core/CoreEnvironment.java    |  3 +
 .../impl/CoreVirtualFilePointerManager.java   | 73 +++++++++++++++++++
 2 files changed, 76 insertions(+)
 create mode 100644 platform/core-impl/src/com/intellij/openapi/vfs/impl/CoreVirtualFilePointerManager.java

diff --git a/platform/core-impl/src/com/intellij/core/CoreEnvironment.java b/platform/core-impl/src/com/intellij/core/CoreEnvironment.java
index 60949a95f064..f2665a0a3b4e 100644
--- a/platform/core-impl/src/com/intellij/core/CoreEnvironment.java
+++ b/platform/core-impl/src/com/intellij/core/CoreEnvironment.java
@@ -38,10 +38,12 @@ import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.openapi.vfs.VirtualFileManager;
 import com.intellij.openapi.vfs.VirtualFileSystem;
 import com.intellij.openapi.vfs.encoding.EncodingRegistry;
+import com.intellij.openapi.vfs.impl.CoreVirtualFilePointerManager;
 import com.intellij.openapi.vfs.impl.VirtualFileManagerImpl;
 import com.intellij.openapi.vfs.impl.jar.CoreJarFileSystem;
 import com.intellij.openapi.vfs.local.CoreLocalFileSystem;
 import com.intellij.openapi.vfs.newvfs.FileSystemPersistence;
+import com.intellij.openapi.vfs.pointers.VirtualFilePointerManager;
 import com.intellij.psi.PsiFileFactory;
 import com.intellij.psi.PsiManager;
 import com.intellij.psi.PsiReferenceService;
@@ -119,6 +121,7 @@ public class CoreEnvironment {
                                                          }
                               )
     );
+    registerComponentInstance(appContainer, VirtualFilePointerManager.class, new CoreVirtualFilePointerManager());
 
     myApplication.registerService(DefaultASTFactory.class, new CoreASTFactory());
     myApplication.registerService(PsiBuilderFactory.class, new PsiBuilderFactoryImpl());
diff --git a/platform/core-impl/src/com/intellij/openapi/vfs/impl/CoreVirtualFilePointerManager.java b/platform/core-impl/src/com/intellij/openapi/vfs/impl/CoreVirtualFilePointerManager.java
new file mode 100644
index 000000000000..cdefb7fe0fc5
--- /dev/null
+++ b/platform/core-impl/src/com/intellij/openapi/vfs/impl/CoreVirtualFilePointerManager.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2000-2012 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.openapi.vfs.impl;
+
+import com.intellij.openapi.Disposable;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.openapi.vfs.VirtualFileManager;
+import com.intellij.openapi.vfs.pointers.VirtualFilePointer;
+import com.intellij.openapi.vfs.pointers.VirtualFilePointerContainer;
+import com.intellij.openapi.vfs.pointers.VirtualFilePointerListener;
+import com.intellij.openapi.vfs.pointers.VirtualFilePointerManager;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * @author yole
+ */
+public class CoreVirtualFilePointerManager extends VirtualFilePointerManager {
+  @NotNull
+  @Override
+  public VirtualFilePointer create(@NotNull String url, @NotNull Disposable parent, @Nullable VirtualFilePointerListener listener) {
+    VirtualFile vFile = VirtualFileManager.getInstance().findFileByUrl(url);
+    return new IdentityVirtualFilePointer(vFile, url);
+  }
+
+  @NotNull
+  @Override
+  public VirtualFilePointer create(@NotNull VirtualFile file, @NotNull Disposable parent, @Nullable VirtualFilePointerListener listener) {
+    return new IdentityVirtualFilePointer(file, file.getUrl());
+  }
+
+  @NotNull
+  @Override
+  public VirtualFilePointer duplicate(@NotNull VirtualFilePointer pointer,
+                                      @NotNull Disposable parent,
+                                      @Nullable VirtualFilePointerListener listener) {
+    return new IdentityVirtualFilePointer(pointer.getFile(), pointer.getUrl());
+  }
+
+  @NotNull
+  @Override
+  public VirtualFilePointerContainer createContainer(@NotNull Disposable parent) {
+    return new VirtualFilePointerContainerImpl(this, parent, null);
+  }
+
+  @NotNull
+  @Override
+  public VirtualFilePointerContainer createContainer(@NotNull Disposable parent, @Nullable VirtualFilePointerListener listener) {
+    return new VirtualFilePointerContainerImpl(this, parent, listener);
+  }
+
+  @Override
+  public void dispose() {
+  }
+
+  @Override
+  public long getModificationCount() {
+    return 0;
+  }
+}