/*******************************************************************************
 * Copyright (c) 2000, 2011 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
 *     Sebastian Davids, sdavids@gmx.de - 187316 [preferences] Mark Occurences Pref Page; Link to
 *******************************************************************************/
package org.eclipse.jdt.internal.ui.preferences;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
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.Link;

import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.IStatus;

import org.eclipse.jface.layout.PixelConverter;

import org.eclipse.ui.dialogs.PreferencesUtil;

import org.eclipse.ui.texteditor.AnnotationPreference;

import org.eclipse.ui.editors.text.EditorsUI;

import org.eclipse.jdt.ui.PreferenceConstants;

import org.eclipse.jdt.internal.ui.dialogs.StatusInfo;
import org.eclipse.jdt.internal.ui.preferences.OverlayPreferenceStore.OverlayKey;


/**
 * Configures Java Editor hover preferences.
 *
 * @since 2.1
 */
class MarkOccurrencesConfigurationBlock implements IPreferenceConfigurationBlock {

	private OverlayPreferenceStore fStore;


	private Map<Button, String> fCheckBoxes= new HashMap<Button, String>();
	private SelectionListener fCheckBoxListener= new SelectionListener() {
		public void widgetDefaultSelected(SelectionEvent e) {
		}
		public void widgetSelected(SelectionEvent e) {
			Button button= (Button) e.widget;
			fStore.setValue(fCheckBoxes.get(button), button.getSelection());
		}
	};

	/**
	 * List of master/slave listeners when there's a dependency.
	 *
	 * @see #createDependency(Button, String, Control)
	 * @since 3.0
	 */
	private ArrayList<SelectionListener> fMasterSlaveListeners= new ArrayList<SelectionListener>();

	private StatusInfo fStatus;

	public MarkOccurrencesConfigurationBlock(OverlayPreferenceStore store) {
		Assert.isNotNull(store);
		fStore= store;

		fStore.addKeys(createOverlayStoreKeys());
	}

	private OverlayPreferenceStore.OverlayKey[] createOverlayStoreKeys() {

		ArrayList<OverlayKey> overlayKeys= new ArrayList<OverlayKey>();

		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, PreferenceConstants.EDITOR_MARK_OCCURRENCES));
		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, PreferenceConstants.EDITOR_MARK_TYPE_OCCURRENCES));
		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, PreferenceConstants.EDITOR_MARK_METHOD_OCCURRENCES));
		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, PreferenceConstants.EDITOR_MARK_CONSTANT_OCCURRENCES));
		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, PreferenceConstants.EDITOR_MARK_FIELD_OCCURRENCES));
		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, PreferenceConstants.EDITOR_MARK_LOCAL_VARIABLE_OCCURRENCES));
		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, PreferenceConstants.EDITOR_MARK_EXCEPTION_OCCURRENCES));
		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, PreferenceConstants.EDITOR_MARK_METHOD_EXIT_POINTS));
		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, PreferenceConstants.EDITOR_MARK_IMPLEMENTORS));
		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, PreferenceConstants.EDITOR_MARK_BREAK_CONTINUE_TARGETS));
		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, PreferenceConstants.EDITOR_STICKY_OCCURRENCES));

		OverlayPreferenceStore.OverlayKey[] keys= new OverlayPreferenceStore.OverlayKey[overlayKeys.size()];
		overlayKeys.toArray(keys);
		return keys;
	}

	/**
	 * Creates page for mark occurrences preferences.
	 *
	 * @param parent the parent composite
	 * @return the control for the preference page
	 */
	public Control createControl(final Composite parent) {

		Composite composite= new Composite(parent, SWT.NONE);
		GridLayout layout= new GridLayout();
		layout.numColumns= 1;
		layout.marginHeight= 0;
		layout.marginWidth= 0;
		composite.setLayout(layout);

		Link link= new Link(composite, SWT.NONE);
		link.setText(PreferencesMessages.MarkOccurrencesConfigurationBlock_link);
		link.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent e) {
				String data= null;
				AnnotationPreference preference= EditorsUI.getAnnotationPreferenceLookup().getAnnotationPreference("org.eclipse.jdt.ui.occurrences"); //$NON-NLS-1$
				if (preference != null)
					data= preference.getPreferenceLabel();
				PreferencesUtil.createPreferenceDialogOn(parent.getShell(), e.text, null, data);
			}
		});

		addFiller(composite);

		String label;

		label= PreferencesMessages.MarkOccurrencesConfigurationBlock_markOccurrences;
		Button master= addCheckBox(composite, label, PreferenceConstants.EDITOR_MARK_OCCURRENCES, 0);

		addFiller(composite);

		label= PreferencesMessages.MarkOccurrencesConfigurationBlock_markTypeOccurrences;
		Button slave= addCheckBox(composite, label, PreferenceConstants.EDITOR_MARK_TYPE_OCCURRENCES, 0);
		createDependency(master, PreferenceConstants.EDITOR_STICKY_OCCURRENCES, slave);

		label= PreferencesMessages.MarkOccurrencesConfigurationBlock_markMethodOccurrences;
		slave= addCheckBox(composite, label, PreferenceConstants.EDITOR_MARK_METHOD_OCCURRENCES, 0);
		createDependency(master, PreferenceConstants.EDITOR_MARK_METHOD_OCCURRENCES, slave);

		label= PreferencesMessages.MarkOccurrencesConfigurationBlock_markConstantOccurrences;
		slave= addCheckBox(composite, label, PreferenceConstants.EDITOR_MARK_CONSTANT_OCCURRENCES, 0);
		createDependency(master, PreferenceConstants.EDITOR_MARK_CONSTANT_OCCURRENCES, slave);

		label= PreferencesMessages.MarkOccurrencesConfigurationBlock_markFieldOccurrences;
		slave= addCheckBox(composite, label, PreferenceConstants.EDITOR_MARK_FIELD_OCCURRENCES, 0);
		createDependency(master, PreferenceConstants.EDITOR_MARK_FIELD_OCCURRENCES, slave);

		label= PreferencesMessages.MarkOccurrencesConfigurationBlock_markLocalVariableOccurrences;
		slave= addCheckBox(composite, label, PreferenceConstants.EDITOR_MARK_LOCAL_VARIABLE_OCCURRENCES, 0);
		createDependency(master, PreferenceConstants.EDITOR_MARK_LOCAL_VARIABLE_OCCURRENCES, slave);

		label= PreferencesMessages.MarkOccurrencesConfigurationBlock_markExceptionOccurrences;
		slave= addCheckBox(composite, label, PreferenceConstants.EDITOR_MARK_EXCEPTION_OCCURRENCES, 0);
		createDependency(master, PreferenceConstants.EDITOR_MARK_EXCEPTION_OCCURRENCES, slave);

		label= PreferencesMessages.MarkOccurrencesConfigurationBlock_markMethodExitPoints;
		slave= addCheckBox(composite, label, PreferenceConstants.EDITOR_MARK_METHOD_EXIT_POINTS, 0);
		createDependency(master, PreferenceConstants.EDITOR_MARK_METHOD_EXIT_POINTS, slave);

		label= PreferencesMessages.MarkOccurrencesConfigurationBlock_markImplementors;
		slave= addCheckBox(composite, label, PreferenceConstants.EDITOR_MARK_IMPLEMENTORS, 0);
		createDependency(master, PreferenceConstants.EDITOR_MARK_IMPLEMENTORS, slave);

		label= PreferencesMessages.MarkOccurrencesConfigurationBlock_markBreakContinueTargets;
		slave= addCheckBox(composite, label, PreferenceConstants.EDITOR_MARK_BREAK_CONTINUE_TARGETS, 0);
		createDependency(master, PreferenceConstants.EDITOR_MARK_BREAK_CONTINUE_TARGETS, slave);

		addFiller(composite);

		label= PreferencesMessages.MarkOccurrencesConfigurationBlock_stickyOccurrences;
		slave= addCheckBox(composite, label, PreferenceConstants.EDITOR_STICKY_OCCURRENCES, 0);
		createDependency(master, PreferenceConstants.EDITOR_STICKY_OCCURRENCES, slave);

		return composite;
	}

	private void addFiller(Composite composite) {
		PixelConverter pixelConverter= new PixelConverter(composite);

		Label filler= new Label(composite, SWT.LEFT );
		GridData gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
		gd.horizontalSpan= 2;
		gd.heightHint= pixelConverter.convertHeightInCharsToPixels(1) / 2;
		filler.setLayoutData(gd);
	}

	private Button addCheckBox(Composite parent, String label, String key, int indentation) {
		Button checkBox= new Button(parent, SWT.CHECK);
		checkBox.setText(label);

		GridData gd= new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
		gd.horizontalIndent= indentation;
		gd.horizontalSpan= 2;
		checkBox.setLayoutData(gd);
		checkBox.addSelectionListener(fCheckBoxListener);

		fCheckBoxes.put(checkBox, key);

		return checkBox;
	}

	private void createDependency(final Button master, String masterKey, final Control slave) {
		indent(slave);
		boolean masterState= fStore.getBoolean(masterKey);
		slave.setEnabled(masterState);
		SelectionListener listener= new SelectionListener() {
			public void widgetSelected(SelectionEvent e) {
				slave.setEnabled(master.getSelection());
			}

			public void widgetDefaultSelected(SelectionEvent e) {}
		};
		master.addSelectionListener(listener);
		fMasterSlaveListeners.add(listener);
	}

	private static void indent(Control control) {
		GridData gridData= new GridData();
		gridData.horizontalIndent= 10;
		control.setLayoutData(gridData);
	}

	public void initialize() {
		initializeFields();
	}

	void initializeFields() {

		Iterator<Button> iter= fCheckBoxes.keySet().iterator();
		while (iter.hasNext()) {
			Button b= iter.next();
			String key= fCheckBoxes.get(b);
			b.setSelection(fStore.getBoolean(key));
		}

        // Update slaves
        Iterator<SelectionListener> iter2= fMasterSlaveListeners.iterator();
        while (iter2.hasNext()) {
            SelectionListener listener= iter2.next();
            listener.widgetSelected(null);
        }

	}

	public void performOk() {
	}

	public void performDefaults() {
		restoreFromPreferences();
		initializeFields();
	}

	private void restoreFromPreferences() {

	}

	IStatus getStatus() {
		if (fStatus == null)
			fStatus= new StatusInfo();
		return fStatus;
	}

	/*
	 * @see org.eclipse.jdt.internal.ui.preferences.IPreferenceConfigurationBlock#dispose()
	 * @since 3.0
	 */
	public void dispose() {
	}
}