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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
3    * agreements. See the NOTICE file distributed with this work for additional information regarding
4    * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
5    * "License"); you may not use this file except in compliance with the License. You may obtain a
6    * copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable
7    * law or agreed to in writing, software distributed under the License is distributed on an "AS IS"
8    * BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License
9    * for the specific language governing permissions and limitations under the License.
10   */
11  package org.apache.log4j.chainsaw;
12  
13  import java.awt.Toolkit;
14  import java.awt.datatransfer.StringSelection;
15  import java.awt.event.ActionEvent;
16  import java.util.Iterator;
17  import java.util.List;
18  
19  import javax.swing.AbstractAction;
20  import javax.swing.Action;
21  
22  import org.apache.log4j.EnhancedPatternLayout;
23  import org.apache.log4j.Layout;
24  import org.apache.log4j.spi.LoggingEvent;
25  
26  public class CopyEventsToClipboardAction extends AbstractAction {
27  
28      private static final long serialVersionUID = 1L;
29      private static final int EVENTSIZE_FUDGE_FACTOR = 128; // guestimate 128 chars per event
30      private final LogUI logUi;
31  
32      /**
33       * Layout pattern uses a simple but concise format that reads well and has a fixed size set of
34       * useful columns before the message. Nice format for pasting into issue trackers.
35       */
36      private final Layout layout = new EnhancedPatternLayout(
37              "[%d{ISO8601} %-5p][%20.20c][%t] %m%n");
38  
39      public CopyEventsToClipboardAction(LogUI parent) {
40          super("Copy events to clipboard");
41          this.logUi = parent;
42          layout.activateOptions();
43          
44          putValue(Action.SHORT_DESCRIPTION,
45                  "Copies to the clipboard currently visible events to a human-readable, log-like format");
46  
47      }
48      
49      
50      public void actionPerformed(ActionEvent e) {
51          List filteredEvents = logUi.getCurrentLogPanel().getFilteredEvents();
52          StringBuffer writer = new StringBuffer(filteredEvents.size() * EVENTSIZE_FUDGE_FACTOR);
53          for (Iterator iterator = filteredEvents.iterator(); iterator.hasNext();) {
54              LoggingEvent event = ((LoggingEventWrapper) iterator.next()).getLoggingEvent();
55              writer.append(layout.format(event));
56          }
57  
58          StringSelection stringSelection = new StringSelection(writer.toString());
59          Toolkit.getDefaultToolkit().getSystemClipboard().setContents(stringSelection,
60                  stringSelection);
61      }
62  
63  }