/*
* jEdit macro to open the root of the project the currently open
* buffer belongs to in the jEdit file browser.
* 
* Copyright 2010-2011 Ali Rantakari - http://hasseg.org
*
*/


/**
 * Tries to find the root of the 'current project', assuming
 * all project files live under the same directory structure
 * and that they are all under the same version control
 * repository.
 * 
 * For Git, Mercurial and Bazaar (and it seems Darcs?) this is
 * easy since they only have their 'dot-directory' at the root
 * of the structure but Subversion (and I assume CVS) put them
 * everywhere so we have to find the _last_ directory to have
 * one.
 * 
 */
String findProjectRoot()
{
	dir = new File(buffer.getDirectory());
	previousDir = null;
	boolean previousDirHasSvnDir = false;
	boolean previousDirHasCvsDir = false;
	
	while (dir != null)
	{
		boolean hasSvnDir = false;
		boolean hasCvsDir = false;
		
		list = dir.list();
		for (childName : list)
		{
			if (!hasSvnDir && childName.equals(".svn"))
				hasSvnDir = true;
			else if (!hasCvsDir && childName.equals("CVS"))
				hasCvsDir = true;
			else if (childName.equals(".git")
				|| childName.equals(".hg")
				|| childName.equals(".bzr")
				|| childName.equals("_darcs")
				)
				return dir.getAbsolutePath();
		}
		
		if (previousDir != null
			&& ((previousDirHasSvnDir && !hasSvnDir)
				|| (previousDirHasCvsDir && !hasCvsDir))
			)
			return previousDir.getAbsolutePath();
		
		previousDirHasSvnDir = hasSvnDir;
		previousDirHasCvsDir = hasCvsDir;
		previousDir = dir;
		dir = dir.getParentFile();
	}
	
	return null;
}

root = findProjectRoot();
if (root == null)
{
	VFSBrowser.browseDirectory(view, buffer.getDirectory());
	view.getEditPane().focusOnTextArea();
	view.getStatus().setMessageAndClear("Browser directory set to current buffer's location (cannot find project root.).");
}
else
{
	VFSBrowser.browseDirectory(view, root);
	view.getEditPane().focusOnTextArea();
	view.getStatus().setMessageAndClear("Project root guessed; browser directory set to it.");
}