SqlHistoryEntry.java :  » Database-Client » SQL-Workbench » workbench » gui » sql » Java Open Source

/*
 * SqlHistoryEntry.java
 *
 * This file is part of SQL Workbench/J, http://www.sql-workbench.net
 *
 * Copyright 2002-2008, Thomas Kellerer
 * No part of this code maybe reused without the permission of the author
 *
 * To contact the author please send an email to: support@sql-workbench.net
 *
 */
package workbench.gui.sql;

import workbench.log.LogMgr;
import workbench.util.StringUtil;

/**
 * A single entry for {@link workbench.gui.sql.SqlHistory}
 * 
 * @author support@sql-workbench.net
 */
public class SqlHistoryEntry
{
  private String text;
  private int cursorPos;
  private int selectionStart;
  private int selectionEnd;

  public SqlHistoryEntry(String sql, int pos, int selStart, int selEnd)
  {
    this.setText(sql);
    int len = this.text.length();
    if (pos > len)
      this.cursorPos = len - 1;
    else
      this.cursorPos = pos;

    if (selStart < 0)
      this.selectionStart = 0;
    else
      this.selectionStart = selStart;

    if (selEnd > len)
      this.selectionEnd = len - 1;
    else
      this.selectionEnd = selEnd;
  }

  public SqlHistoryEntry(String sql)
  {
    this.setText(sql);
    this.cursorPos = -1;
    this.selectionStart = -1;
    this.selectionEnd = -1;
  }

  public String getText() { return this.text; }
  public int getCursorPosition() { return this.cursorPos; }
  public int getSelectionStart() { return this.selectionStart; }
  public int getSelectionEnd() { return this.selectionEnd; }

  public void applyTo(EditorPanel editor)
  {
    if (editor == null) return;
    try
    {
      editor.setText(this.text);
      editor.setCaretPosition(0);
      if (this.cursorPos > -1) 
      {
        editor.setCaretPosition(this.cursorPos);
        editor.scrollToCaret();
      }
      if (this.selectionStart > -1 && this.selectionEnd > this.selectionStart && this.selectionEnd < editor.getDocumentLength())
      {
        editor.select(this.selectionStart, this.selectionEnd);
      }
    }
    catch (Exception e)
    {
      LogMgr.logWarning("SqlHistoryEntry.applyTo()", "Error applying " + this.toString(), e);
    }
  }

  public String toString()
  {
    return "{" + StringUtil.getMaxSubstring(this.text, 40) + ", Cursor=" + this.cursorPos + ", Selection=[" + this.selectionStart + "," + this.selectionEnd + "]}";
  }


  public boolean equals(Object o)
  {
    if (!(o instanceof SqlHistoryEntry)) return false;
    SqlHistoryEntry other = (SqlHistoryEntry)o;
    if (this.text.equals(other.text))
    {
      return (this.cursorPos == other.cursorPos &&
              this.selectionEnd == other.selectionEnd &&
              this.selectionStart == other.selectionStart);
    }
    else
    {
      return false;
    }
  }

  private void setText(String value)
  {
    if (value == null) 
    {
      this.text = "";
    }
    else 
    {
      this.text = value;
    }
  }
}