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/jEdit/tags/jedit-4-3-pre5/macros/Java/Get_Package_Name.bsh

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  1/*
  2 * Get_Package_Name.bsh - a BeanShell macro script for the
  3 * jEdit text editor - insert package name based upon path
  4 * of current buffer
  5 * Copyright (C) 2001 John Gellene
  6 * jgellene@nyc.rr.com
  7 * http://community.jedit.org
  8 *
  9 * This program is free software; you can redistribute it and/or
 10 * modify it under the terms of the GNU General Public License
 11 * as published by the Free Software Foundation; either version 2
 12 * of the License, or any later version.
 13 *
 14 * This program is distributed in the hope that it will be useful,
 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 17 * GNU General Public License for more details.
 18 *
 19 * You should have received a copy of the GNU General Public License
 20 * along with this program; if not, write to the Free Software
 21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 22 *
 23 * Based on code contributed by Richard Wan
 24 *
 25 * $Id: Get_Package_Name.bsh 4995 2004-03-19 15:58:00Z spestov $
 26 *
 27 * Checked for jEdit 4.0 API
 28 *
 29 */
 30
 31boolean testClassPath()
 32{
 33	classpath = System.getProperty("java.class.path");
 34	classSeparator = (File.separatorChar == '/' ? ':' : ';');
 35	return (classpath.indexOf(classSeparator) != -1)
 36		|| (!classpath.endsWith("jedit.jar"));
 37}
 38
 39
 40File getCanonicalFile(File file)
 41{
 42    try
 43    {
 44        return new File(file.getCanonicalPath());
 45    }
 46    catch(IOException e)
 47    {
 48        return new File(file.getAbsolutePath());
 49    }
 50}
 51
 52File getRoot(File file)
 53{
 54    tokens = new StringTokenizer(System.getProperty("java.class.path"),
 55        File.pathSeparator);
 56    fileSet = new Hashtable();
 57    while(tokens.hasMoreTokens())
 58	{
 59		String tok = tokens.nextToken();
 60        fileSet.put(getCanonicalFile(new File(tok)), tok);
 61	}
 62
 63    while(file != null)
 64    {
 65        if(fileSet.get(getCanonicalFile(file)) != null)
 66            break;
 67        parent = file.getParent();
 68        file = (parent != null) ? new File(parent) : null;
 69    }
 70    return file;
 71}
 72
 73
 74String determinePackageName(String path)
 75{
 76    pathFile = new File(buffer.getPath());
 77    File root = getRoot(pathFile);
 78    if(root == null)
 79        return null;
 80    parent = pathFile.getParent();
 81    packagePath = parent.substring(root.getPath().length(), parent.length());
 82    packagePath = packagePath.replace(File.separatorChar, '.');
 83    if (packagePath.endsWith("."))
 84    {
 85        packagePath = packagePath.substring(0, packagePath.length() - 1);
 86    }
 87    if (packagePath.startsWith("."))
 88    {
 89        packagePath = packagePath.substring(1, packagePath.length());
 90    }
 91    return packagePath;
 92}
 93
 94if( buffer.isReadOnly() )
 95	Macros.error( view, "Buffer is read-only." );
 96else
 97{
 98	// main routine
 99	if(!testClassPath())
100	{
101		Macros.error(view, "This macro will not work when the Java interpreter\n"
102			+ "loads jEdit with the '-jar' command line option.");
103	}
104	else
105	{
106		result = determinePackageName(buffer.getPath());
107		if(result == null)
108		{
109			Macros.error(view, "Could not find a package name.");
110		}
111		else textArea.setSelectedText(result);
112	}
113}
114
115/*
116	Macro index data (in DocBook format)
117
118<listitem>
119    <para><filename>Get_Package_Name.bsh</filename></para>
120    <abstract><para>
121        Inserts a plausible Java package name for the current buffer.
122    </para></abstract>
123    <para>
124        The macro compares the buffer's path name with the elements of the
125        classpath being used by the jEdit session.  An error message will be
126        displayed if no suitable package name is found. This macro will not
127        work if jEdit is being run as a JAR file without specifying a
128        classpath.  In that case the classpath seen by the macro consists
129        solely of the JAR file.
130    </para>
131</listitem>
132
133*/
134
135// end Get_Package_Name.bsh
136