/*
    * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
    * agreements. See the NOTICE file distributed with this work for additional information regarding
    * copyright ownership. The ASF licenses this file to You 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 org.apache.log4j.chainsaw;
  
  import org.apache.log4j.EnhancedPatternLayout;
  import org.apache.log4j.Layout;
  import org.apache.log4j.spi.LoggingEvent;
  
  import javax.swing.*;
  import java.awt.*;
  import java.awt.datatransfer.StringSelection;
  import java.awt.event.ActionEvent;
  import java.util.List;
  
  public class CopyEventsToClipboardAction extends AbstractAction {
  
      private static final long serialVersionUID = 1L;
      private static final int EVENTSIZE_FUDGE_FACTOR = 128; // guestimate 128 chars per event
      private final LogUI logUi;
  
      /**
       * Layout pattern uses a simple but concise format that reads well and has a fixed size set of
       * useful columns before the message. Nice format for pasting into issue trackers.
       */
      private final Layout layout = new EnhancedPatternLayout(
          "[%d{ISO8601} %-5p][%20.20c][%t] %m%n");
  
      public CopyEventsToClipboardAction(LogUI parent) {
          super("Copy events to clipboard");
          this.logUi = parent;
          layout.activateOptions();
  
          putValue(Action.SHORT_DESCRIPTION,
              "Copies to the clipboard currently visible events to a human-readable, log-like format");
  
      }
  
  
      public void actionPerformed(ActionEvent e) {
          List filteredEvents = logUi.getCurrentLogPanel().getFilteredEvents();
          StringBuilder writer = new StringBuilder(filteredEvents.size() * EVENTSIZE_FUDGE_FACTOR);
          for (Object filteredEvent : filteredEvents) {
              LoggingEvent event = ((LoggingEventWrapper) filteredEvent).getLoggingEvent();
              writer.append(layout.format(event));
          }
  
          StringSelection stringSelection = new StringSelection(writer.toString());
          Toolkit.getDefaultToolkit().getSystemClipboard().setContents(stringSelection,
              stringSelection);
      }
  
  }