/*
 * Copyright (c) 2003-2004 Christopher Lenz 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:
 *     Christopher Lenz - initial API and implementation
 * 
 * $Id: CssEditorSyntaxConfigurationBlock.java,v 1.1 2004-09-02 18:11:50 jsurfer Exp $
 */

package net.sourceforge.phpeclipse.css.ui.internal.preferences;

import net.sourceforge.phpeclipse.css.ui.internal.CssUIMessages;
import net.sourceforge.phpeclipse.css.ui.internal.CssUIPreferences;

import org.eclipse.jface.preference.ColorSelector;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferenceConverter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.List;

/**
 * 
 */
final class CssEditorSyntaxConfigurationBlock
	extends AbstractConfigurationBlock {

	// Instance Variables ------------------------------------------------------

	private Button fBackgroundDefaultRadioButton;
	private Button fBackgroundCustomRadioButton;
	private ColorSelector fBackgroundColorSelector;
	private List fColorList;
	private final String[][] fColorListModel = new String[][] {
		{ getString("commentColor"), //$NON-NLS-1$
		  CssUIPreferences.EDITOR_COMMENT_COLOR,
		  CssUIPreferences.EDITOR_COMMENT_BOLD },
		{ getString("stringColor"), //$NON-NLS-1$
		  CssUIPreferences.EDITOR_STRING_COLOR,
		  CssUIPreferences.EDITOR_STRING_BOLD },
		{ getString("propertyNameColor"), //$NON-NLS-1$
		  CssUIPreferences.EDITOR_PROPERTY_COLOR,
		  CssUIPreferences.EDITOR_PROPERTY_BOLD },
		{ getString("atKeywordColor"), //$NON-NLS-1$
		  CssUIPreferences.EDITOR_AT_KEYWORD_COLOR,
		  CssUIPreferences.EDITOR_AT_KEYWORD_BOLD },
		{ getString("pseudoClassColor"), //$NON-NLS-1$
		  CssUIPreferences.EDITOR_PSEUDO_CLASS_COLOR,
		  CssUIPreferences.EDITOR_PSEUDO_CLASS_BOLD },
		{ getString("defaultColor"), //$NON-NLS-1$
		  CssUIPreferences.EDITOR_DEFAULT_COLOR,
		  CssUIPreferences.EDITOR_DEFAULT_BOLD },
	};
	private ColorSelector fColorSelector;
	private Button fBoldCheckbox;

	// Constructors ------------------------------------------------------------

	public CssEditorSyntaxConfigurationBlock(IPreferenceStore store) {
		super(store);
	}

	// Public Methods ----------------------------------------------------------

	public Control createControl(Composite parent) {

		Composite composite = new Composite(parent, SWT.NONE);
		composite.setLayout(new GridLayout());

		Group backgroundComposite = new Group(composite, SWT.SHADOW_ETCHED_IN);
		backgroundComposite.setLayout(new RowLayout());
		backgroundComposite.setText(getString("backgroundColor")); //$NON-NLS-1$
		SelectionListener backgroundSelectionListener =
			new SelectionListener() {
				public void widgetSelected(SelectionEvent e) {				
					boolean custom =
						fBackgroundCustomRadioButton.getSelection();
					fBackgroundColorSelector.setEnabled(custom);
					getPreferenceStore().setValue(
						CssUIPreferences.EDITOR_BACKGROUND_DEFAULT_COLOR,
						!custom);
				}
				public void widgetDefaultSelected(SelectionEvent e) { }
			};
		fBackgroundDefaultRadioButton = new Button(backgroundComposite,
			SWT.RADIO | SWT.LEFT);
		fBackgroundDefaultRadioButton.setText(getString(
			"backgroundColorSystemDefault")); //$NON-NLS-1$
		fBackgroundDefaultRadioButton.addSelectionListener(
			backgroundSelectionListener);
		fBackgroundCustomRadioButton = new Button(backgroundComposite,
			SWT.RADIO | SWT.LEFT);
		fBackgroundCustomRadioButton.setText(getString(
			"backgroundColorCustom")); //$NON-NLS-1$
		fBackgroundCustomRadioButton.addSelectionListener(
			backgroundSelectionListener);

		fBackgroundColorSelector = new ColorSelector(backgroundComposite);
		Button backgroundColorButton = fBackgroundColorSelector.getButton();
		backgroundColorButton.addSelectionListener(new SelectionListener() {
			public void widgetDefaultSelected(SelectionEvent e) { }
			public void widgetSelected(SelectionEvent e) {
				PreferenceConverter.setValue(getPreferenceStore(),
					CssUIPreferences.EDITOR_BACKGROUND_COLOR,
					fBackgroundColorSelector.getColorValue());
			}
		});

		Label label = new Label(composite, SWT.LEFT);
		label.setText(getString("foregroundColor")); //$NON-NLS-1$
		label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

		Composite editorComposite = new Composite(composite, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.numColumns = 2;
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		editorComposite.setLayout(layout);
		GridData gridData = new GridData(GridData.FILL_BOTH);
		editorComposite.setLayoutData(gridData);	  

		fColorList = new List(editorComposite,
			SWT.SINGLE | SWT.V_SCROLL | SWT.BORDER);
		gridData = new GridData(GridData.FILL_BOTH);
		gridData.heightHint = convertHeightInCharsToPixels(composite, 5);
		fColorList.setLayoutData(gridData);
		fColorList.addSelectionListener(new SelectionListener() {
			public void widgetDefaultSelected(SelectionEvent e) {
			}
			public void widgetSelected(SelectionEvent e) {
				handleSyntaxColorListSelection();
			}
		});

		Composite stylesComposite = new Composite(editorComposite, SWT.NONE);
		layout = new GridLayout();
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		layout.numColumns = 2;
		stylesComposite.setLayout(layout);
		stylesComposite.setLayoutData(new GridData(GridData.FILL_BOTH));
		
		label = new Label(stylesComposite, SWT.LEFT);
		label.setText(getString("color")); //$NON-NLS-1$
		gridData = new GridData();
		gridData.horizontalAlignment = GridData.BEGINNING;
		label.setLayoutData(gridData);

		fColorSelector = new ColorSelector(stylesComposite);
		Button foregroundColorButton = fColorSelector.getButton();
		gridData = new GridData(GridData.FILL_HORIZONTAL);
		gridData.horizontalAlignment = GridData.BEGINNING;
		foregroundColorButton.setLayoutData(gridData);
		foregroundColorButton.addSelectionListener(new SelectionListener() {
			public void widgetDefaultSelected(SelectionEvent e) { }
			public void widgetSelected(SelectionEvent e) {
				int i = fColorList.getSelectionIndex();
				String key = fColorListModel[i][1];
				PreferenceConverter.setValue(getPreferenceStore(), key,
					fColorSelector.getColorValue());
			}
		});
		
		fBoldCheckbox = new Button(stylesComposite, SWT.CHECK);
		fBoldCheckbox.setText(getString("bold")); //$NON-NLS-1$
		gridData = new GridData(GridData.FILL_HORIZONTAL);
		gridData.horizontalAlignment = GridData.BEGINNING;
		gridData.horizontalSpan = 2;
		fBoldCheckbox.setLayoutData(gridData);
		fBoldCheckbox.addSelectionListener(new SelectionListener() {
			public void widgetDefaultSelected(SelectionEvent e) { }
			public void widgetSelected(SelectionEvent e) {
				int i = fColorList.getSelectionIndex();
				String key = fColorListModel[i][2];
				getPreferenceStore().setValue(key,
					fBoldCheckbox.getSelection());
			}
		});

		Control previewer =
			new SyntaxPreviewer(composite, getPreferenceStore()).getControl();
		gridData = new GridData(GridData.FILL_BOTH);
		gridData.widthHint = convertWidthInCharsToPixels(composite, 20);
		gridData.heightHint = convertHeightInCharsToPixels(composite, 5);
		previewer.setLayoutData(gridData);

		initialize();

		return composite;
	}

	/**
	 * @see AbstractConfigurationBlock#initializeFields()
	 */
	public void initializeFields() {
		super.initializeFields();
		RGB rgb = PreferenceConverter.getColor(getPreferenceStore(),
			CssUIPreferences.EDITOR_BACKGROUND_COLOR);
		fBackgroundColorSelector.setColorValue(rgb);
		boolean defaultBackgroud = getPreferenceStore().getBoolean(
			CssUIPreferences.EDITOR_BACKGROUND_DEFAULT_COLOR);
		fBackgroundDefaultRadioButton.setSelection(defaultBackgroud);
		fBackgroundCustomRadioButton.setSelection(!defaultBackgroud);
		fBackgroundColorSelector.setEnabled(!defaultBackgroud);
	}

	// Event Handlers ----------------------------------------------------------

	void handleSyntaxColorListSelection() {
		int i = fColorList.getSelectionIndex();
		String key = fColorListModel[i][1];
		RGB rgb = PreferenceConverter.getColor(getPreferenceStore(), key);
		fColorSelector.setColorValue(rgb);
		key = fColorListModel[i][2];
		fBoldCheckbox.setSelection(getPreferenceStore().getBoolean(key));
	}

	// Private Methods ---------------------------------------------------------

	private static String getString(String key) {
		return CssUIMessages.getString(
			"CssEditorPreferencePage.syntax." + key); //$NON-NLS-1$
	}

	private void initialize() {
		for (int i = 0; i < fColorListModel.length; i++) {
			fColorList.add(fColorListModel[i][0]);
		}
		fColorList.getDisplay().asyncExec(new Runnable() {
			public void run() {
				if ((fColorList != null)
				 && !fColorList.isDisposed()) {
					fColorList.select(0);
					handleSyntaxColorListSelection();
				}
			}
		});
		initializeFields();
	}

}