1 files changed, 68 insertions, 0 deletions
diff --git a/platform/platform-impl/src/com/intellij/openapi/editor/ClipboardTextPerCaretSplitter.java b/platform/platform-impl/src/com/intellij/openapi/editor/ClipboardTextPerCaretSplitter.java
new file mode 100644
index 000000000000..a3e62412f4a4
--- /dev/null
+++ b/platform/platform-impl/src/com/intellij/openapi/editor/ClipboardTextPerCaretSplitter.java
@@ -0,0 +1,68 @@
+/*
+ * 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.openapi.editor;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class ClipboardTextPerCaretSplitter {
+  @NotNull
+  public List<String> split(@NotNull String input, @Nullable CaretStateTransferableData caretData, int caretCount) {
+    if (caretCount <= 0) {
+      throw new IllegalArgumentException("Caret count must be positive");
+    }
+    if (caretCount == 1) {
+      return Collections.singletonList(input);
+    }
+    List<String> result = new ArrayList<String>(caretCount);
+    int sourceCaretCount = caretData == null ? -1 : caretData.startOffsets.length;
+    String[] lines = sourceCaretCount == 1 || sourceCaretCount == caretCount ? null : input.split("\n", -1);
+    for (int i = 0; i < caretCount; i++) {
+      if (sourceCaretCount == 1) {
+        result.add(input);
+      }
+      else if (sourceCaretCount == caretCount) {
+        //noinspection ConstantConditions
+        result.add(new String(input.substring(caretData.startOffsets[i], caretData.endOffsets[i])));
+      }
+      else if (lines.length == 0) {
+        result.add("");
+      }
+      else if (lines.length == 1) {
+        result.add(lines[0]);
+      }
+      else if (lines.length % caretCount == 0) {
+        StringBuilder b = new StringBuilder();
+        int linesPerSegment = lines.length / caretCount;
+        for (int j = 0; j < linesPerSegment; j++) {
+          if (j > 0) {
+            b.append('\n');
+          }
+          b.append(lines[i * linesPerSegment + j]);
+        }
+        result.add(b.toString());
+      }
+      else {
+        result.add(i < lines.length ? lines[i] : "");
+      }
+    }
+    return result;
+  }
+}