base class to work with basic text copy2clipboard operations

platform/platform-api/src/com/intellij/ide/TextCopyProvider.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2000-2015 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.ide;
+
+import com.intellij.openapi.actionSystem.DataContext;
+import com.intellij.openapi.ide.CopyPasteManager;
+import com.intellij.openapi.util.text.StringUtil;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.awt.datatransfer.StringSelection;
+import java.util.Collection;
+
+/**
+ * Base class for text-based copy provider
+ *
+ * @author Konstantin Bulenkov
+ */
+public abstract class TextCopyProvider implements CopyProvider {
+  /**
+   * Returns a collection of text blocks to be joined using {@link #getLinesSeparator()} separator.
+   * Returns null of empty collection if copy operation can not be performed
+   *
+   * @return collection of text blocks or null
+   */
+  @Nullable
+  public abstract Collection<String> getTextLinesToCopy();
+
+  @Override
+  public void performCopy(@NotNull DataContext dataContext) {
+    Collection<String> lines = getTextLinesToCopy();
+    if (lines != null && !lines.isEmpty()) {
+      String text = StringUtil.join(lines, getLinesSeparator());
+      CopyPasteManager.getInstance().setContents(new StringSelection(text));
+    }
+  }
+
+  public String getLinesSeparator() {
+    return "\n";
+  }
+
+  @Override
+  public boolean isCopyEnabled(@NotNull DataContext dataContext) {
+    return getTextLinesToCopy() != null;
+  }
+
+  @Override
+  public boolean isCopyVisible(@NotNull DataContext dataContext) {
+    return true;
+  }
+}