1 files changed, 71 insertions, 0 deletions
diff --git a/platform/dvcs-impl/src/com/intellij/dvcs/branch/DvcsMultiRootBranchConfig.java b/platform/dvcs-impl/src/com/intellij/dvcs/branch/DvcsMultiRootBranchConfig.java
new file mode 100644
index 000000000000..ee24209167fa
--- /dev/null
+++ b/platform/dvcs-impl/src/com/intellij/dvcs/branch/DvcsMultiRootBranchConfig.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2000-2014 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.dvcs.branch;
+
+import com.intellij.dvcs.repo.Repository;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collection;
+
+public abstract class DvcsMultiRootBranchConfig<Repo extends Repository> {
+  @NotNull protected final Collection<Repo> myRepositories;
+
+  public DvcsMultiRootBranchConfig(@NotNull Collection<Repo> repositories) {
+    myRepositories = repositories;
+  }
+
+  public boolean diverged() {
+    return getCurrentBranch() == null;
+  }
+
+  @Nullable
+  public String getCurrentBranch() {
+    String commonBranch = null;
+    for (Repo repository : myRepositories) {
+      String branchName = repository.getCurrentBranchName();
+      if (branchName == null) {
+        return null;
+      }
+      // NB: if all repositories are in the rebasing state on the same branches, this branch is returned
+      if (commonBranch == null) {
+        commonBranch = branchName;
+      }
+      else if (!commonBranch.equals(branchName)) {
+        return null;
+      }
+    }
+    return commonBranch;
+  }
+
+  @Nullable
+  public Repository.State getState() {
+    Repository.State commonState = null;
+    for (Repo repository : myRepositories) {
+      Repository.State state = repository.getState();
+      if (commonState == null) {
+        commonState = state;
+      }
+      else if (!commonState.equals(state)) {
+        return null;
+      }
+    }
+    return commonState;
+  }
+
+  @NotNull
+  public abstract Collection<String> getLocalBranchNames();
+}