/*******************************************************************************
 * Copyright (c) 2001, 2006 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Jens Lukowski/Innoopract - initial renaming/restructuring
 *	   David Schneider, david.schneider@unisys.com - [142500] WTP properties pages fonts don't follow Eclipse preferences
 *******************************************************************************/
package org.eclipse.wst.xml.ui.internal.dialogs;

import org.eclipse.core.runtime.IPath;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.PlatformUI;
import org.eclipse.wst.xml.ui.internal.XMLUIMessages;
import org.eclipse.wst.xml.ui.internal.util.XMLCommonUIContextIds;
import org.w3c.dom.DocumentType;

public class EditDoctypeDialog extends Dialog {
	protected boolean computeSystemId;
	protected String[] doctypeData;
	protected boolean errorChecking;
	protected Label errorMessageLabel;
	protected Button okButton;
	protected Button publicIdBrowseButton;
	protected Text publicIdField;
	protected IPath resourceLocation;
	protected Text rootElementNameField;
	protected Button systemIdBrowseButton;
	protected Text systemIdField;

	public EditDoctypeDialog(Shell parentShell, DocumentType doctype) {
		this(parentShell, doctype.getName(), doctype.getPublicId(), doctype.getSystemId());
	}

	public EditDoctypeDialog(Shell parentShell, String name, String publicId, String systemId) {
		super(parentShell);
		setShellStyle(getShellStyle() | SWT.RESIZE);
		doctypeData = new String[3];
		doctypeData[0] = name;
		doctypeData[1] = publicId;
		doctypeData[2] = systemId;
	}

	protected void buttonPressed(int buttonId) {
		doctypeData[0] = getModelValue(rootElementNameField.getText());
		doctypeData[1] = getModelValue(publicIdField.getText());
		doctypeData[2] = getModelValue(systemIdField.getText());
		super.buttonPressed(buttonId);
	}

	protected void createButtonsForButtonBar(Composite parent) {
		okButton = createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);
		createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false);
	}


	protected Control createContents(Composite parent) {
		Control control = super.createContents(parent);
		updateErrorMessage();
		return control;
	}

	protected Control createDialogArea(Composite parent) {
		Composite dialogControl = (Composite) super.createDialogArea(parent);
		PlatformUI.getWorkbench().getHelpSystem().setHelp(dialogControl, XMLCommonUIContextIds.XCUI_DOCTYPE_DIALOG);

		Composite composite = new Composite(dialogControl, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.numColumns = 3;
		layout.marginWidth = 0;
		composite.setLayout(layout);
		composite.setLayoutData(new GridData(GridData.FILL_BOTH));


		ModifyListener modifyListener = new ModifyListener() {
			public void modifyText(ModifyEvent e) {
				if (e.widget == systemIdField) {
					computeSystemId = false;
				}
				updateErrorMessage();
			}
		};

		// row 1
		//
		Label rootElementNameLabel = new Label(composite, SWT.NONE);
		rootElementNameLabel.setText(XMLUIMessages._UI_LABEL_ROOT_ELEMENT_NAME_COLON); //$NON-NLS-1$

		rootElementNameField = new Text(composite, SWT.SINGLE | SWT.BORDER);
		PlatformUI.getWorkbench().getHelpSystem().setHelp(rootElementNameField, XMLCommonUIContextIds.XCUI_DOCTYPE_ROOT);
		GridData gd = new GridData(GridData.FILL_HORIZONTAL);
		gd.widthHint = 200;
		rootElementNameField.setLayoutData(gd);
		rootElementNameField.setText(getDisplayValue(doctypeData[0]));
		rootElementNameField.addModifyListener(modifyListener);

		Label placeHolder = new Label(composite, SWT.NONE);
		placeHolder.setLayoutData(new GridData());

		// row 2
		//
		Label publicIdLabel = new Label(composite, SWT.NONE);
		publicIdLabel.setText(XMLUIMessages._UI_LABEL_PUBLIC_ID_COLON); //$NON-NLS-1$

		publicIdField = new Text(composite, SWT.SINGLE | SWT.BORDER);
		PlatformUI.getWorkbench().getHelpSystem().setHelp(publicIdField, XMLCommonUIContextIds.XCUI_DOCTYPE_PUBLIC);
		publicIdField.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		publicIdField.setText(getDisplayValue(doctypeData[1]));

		SelectionListener selectionListener = new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				EditEntityHelper helper = new EditEntityHelper();
				if (e.widget == publicIdBrowseButton) {
					helper.performBrowseForPublicId(getShell(), publicIdField, computeSystemId ? systemIdField : null);
				}
				else if (e.widget == systemIdBrowseButton) {
					helper.performBrowseForSystemId(getShell(), systemIdField, resourceLocation);
				}
			}
		};

		publicIdBrowseButton = new Button(composite, SWT.NONE);
		publicIdBrowseButton.setText(XMLUIMessages._UI_LABEL_BROWSE); //$NON-NLS-1$
		publicIdBrowseButton.addSelectionListener(selectionListener);

		// row 3
		Label systemIdLabel = new Label(composite, SWT.NONE);
		systemIdLabel.setText(XMLUIMessages._UI_LABEL_SYSTEM_ID_COLON); //$NON-NLS-1$

		systemIdField = new Text(composite, SWT.SINGLE | SWT.BORDER);
		PlatformUI.getWorkbench().getHelpSystem().setHelp(systemIdField, XMLCommonUIContextIds.XCUI_DOCTYPE_SYSTEM);
		systemIdField.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		systemIdField.setText(getDisplayValue(doctypeData[2]));
		systemIdField.addModifyListener(modifyListener);


		systemIdBrowseButton = new Button(composite, SWT.NONE);
		systemIdBrowseButton.setText(XMLUIMessages._UI_LABEL_BROWSE); //$NON-NLS-1$
		systemIdBrowseButton.addSelectionListener(selectionListener);

		// error message
		errorMessageLabel = new Label(dialogControl, SWT.NONE);
		errorMessageLabel.setText(""); //$NON-NLS-1$
		errorMessageLabel.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		Color color = new Color(errorMessageLabel.getDisplay(), 200, 0, 0);
		errorMessageLabel.setForeground(color);

	    Dialog.applyDialogFont(parent);
		return dialogControl;
	}


	protected Label createMessageArea(Composite composite) {
		Label label = new Label(composite, SWT.NONE);
		// label.setText(message);
		return label;
	}


	protected String getDisplayValue(String string) {
		return string != null ? string : ""; //$NON-NLS-1$
	}

	public boolean getErrorChecking() {
		return errorChecking;
	}


	protected String getModelValue(String string) {
		String result = null;
		if (string != null && string.trim().length() > 0) {
			result = string;
		}
		return result;
	}

	public String getName() {
		return doctypeData[0];
	}

	public String getPublicId() {
		return doctypeData[1];
	}

	public String getSystemId() {
		return doctypeData[2];
	}

	public void setComputeSystemId(boolean computeSystemId) {
		this.computeSystemId = computeSystemId;
	}

	public void setErrorChecking(boolean errorChecking) {
		this.errorChecking = errorChecking;
	}

	public void setResourceLocation(IPath path) {
		resourceLocation = path;
	}

	public void updateErrorMessage() {
		if (errorChecking) {
			String errorMessage = null;
			if (getModelValue(systemIdField.getText()) == null) {
				errorMessage = XMLUIMessages._UI_WARNING_SYSTEM_ID_MUST_BE_SPECIFIED; //$NON-NLS-1$
			}
			else if (getModelValue(rootElementNameField.getText()) == null) {
				errorMessage = XMLUIMessages._UI_WARNING_ROOT_ELEMENT_MUST_BE_SPECIFIED; //$NON-NLS-1$
			}

			errorMessageLabel.setText(errorMessage != null ? errorMessage : ""); //$NON-NLS-1$
			okButton.setEnabled(errorMessage == null);
		}
	}
}