/***********************************************************************************************************************************
 * Copyright (c) 2000, 2002 IBM Corp. and others. All rights reserved. This program and the accompanying materials are made
 * available under the terms of the Common Public License v1.0 which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 *
 * Contributors: www.phpeclipse.de
 **********************************************************************************************************************************/
package net.sourceforge.phpeclipse.actions;

import net.sourceforge.phpdt.core.ICodeFormatter;
import net.sourceforge.phpdt.core.ToolFactory;
import net.sourceforge.phpdt.internal.corext.codemanipulation.StubUtility;
import net.sourceforge.phpdt.internal.corext.util.Strings;
import net.sourceforge.phpdt.internal.ui.preferences.CodeFormatterPreferencePage;
import net.sourceforge.phpeclipse.phpeditor.PHPEditor;

import org.eclipse.jface.action.IAction;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.text.TextSelection;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.IEditorActionDelegate;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowActionDelegate;
import org.eclipse.ui.actions.ActionDelegate;

public class PHPFormatAction extends ActionDelegate implements IWorkbenchWindowActionDelegate, IEditorActionDelegate {
	private IWorkbenchWindow fWindow;

	private PHPEditor fEditor;

	public void init(IWorkbenchWindow window) {
		this.fWindow = window;
	}

	public void selectionChanged(IAction action, ISelection selection) {
		if (!selection.isEmpty()) {
			if (selection instanceof TextSelection) {
				action.setEnabled(true);
			} else if (fWindow.getActivePage() != null && fWindow.getActivePage().getActivePart() != null) {
				//
			}
		}
	}

	public void run(IAction action) {
		if (fEditor == null) {
			IEditorPart targetEditor = fWindow.getActivePage().getActiveEditor();
			if (targetEditor != null && (targetEditor instanceof PHPEditor)) {
				fEditor = (PHPEditor) targetEditor;
			}
		}
		if (fEditor != null) {
			ITextSelection selection = (ITextSelection) fEditor.getSelectionProvider().getSelection();
			format(selection);
		}
	}

	public void setActiveEditor(IAction action, IEditorPart targetEditor) {
		if (targetEditor != null && (targetEditor instanceof PHPEditor)) {
			fEditor = (PHPEditor) targetEditor;
		}
	}

	public void format(ITextSelection selection) {
		try {
			IDocument doc = fEditor.getDocumentProvider().getDocument(fEditor.getEditorInput());
			if (doc != null) {
				// int pos = selection.getOffset();
				String content;
				if (selection != null && selection.getLength() > 0) {
					content = doc.get(selection.getOffset(), selection.getLength());
				} else {
					content = doc.get(0, doc.getLength());
				}

				if (content != null && content.length() > 0) {
					ICodeFormatter formatter = ToolFactory.createCodeFormatter();
					String lineDelimiter = StubUtility.getLineDelimiterFor(doc);

					int indent = Strings.computeIndent(content, CodeFormatterPreferencePage.getTabSize());

					String formatted = formatter.format(content, indent, null, lineDelimiter);
					if (!content.equals(formatted)) {
						if (selection != null && selection.getLength() > 0) {
							doc.replace(selection.getOffset(), selection.getLength(), formatted);
						} else {
							doc.replace(0, doc.getLength(), formatted);
						}
					}
				}
			}
		} catch (BadLocationException e) {
			e.printStackTrace();
		}
	}

}