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/*
 * Copyright 2000-2011 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.util.ui;

import com.intellij.ide.DataManager;
import com.intellij.openapi.actionSystem.CommonDataKeys;
import com.intellij.openapi.actionSystem.PlatformDataKeys;
import com.intellij.openapi.editor.Editor;

import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.util.EventObject;

/**
 * @author Konstantin Bulenkov
 */
public class JTableCellEditorHelper {
  private JTableCellEditorHelper() {}

  public static void typeAhead(final JTable table, final EventObject e, final int row, final int column) {
    if (e instanceof KeyEvent) {
      final Runnable r = new Runnable() {
        @Override
        public void run() {
          if (table.getEditingColumn() != column && table.getEditingRow() != row) return;

          Component focusOwner = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
          if (focusOwner == null || !SwingUtilities.isDescendingFrom(focusOwner, table)) return;

          KeyEvent keyEvent = (KeyEvent)e;
          if (Character.isDefined(keyEvent.getKeyChar())) {
            try {
              selectAll(focusOwner);

              Robot r = new Robot();
              r.keyPress(keyEvent.getKeyCode());
              r.keyRelease(keyEvent.getKeyCode());
            }
            catch (AWTException e1) {
              return;
            }
          } else {
            selectAll(focusOwner);
          }
        }
      };

      SwingUtilities.invokeLater(r);
    }
  }

  private static void selectAll(Component component) {
    if (component instanceof TextComponent) {
      ((TextComponent)component).selectAll();
    } else {
      Editor editor = CommonDataKeys.EDITOR.getData(DataManager.getInstance().getDataContext(component));
      if (editor != null) {
        editor.getSelectionModel().setSelection(0, editor.getDocument().getTextLength());
      }
    }
  }
}