package org.eclipse.swt.internal.extension;

import org.eclipse.ercp.swt.mobile.TextExtension;

import org.eclipse.swt.SWT;

import org.eclipse.swt.SWTException;

import org.eclipse.swt.internal.qt.OS;

import org.eclipse.swt.internal.qt.QObjectDeleteWrapper;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Event;

import org.eclipse.swt.widgets.Internal_PackageSupport;

import org.eclipse.swt.widgets.Listener;

/**

 * An extension class to TextExtension.

 * 

 * <p>

 * of type <code>SWTExtension.CaretMoved</code> or 

 * <code>SWTExtension.ContentSelected</code>. 

 * </p><p>

 * Here is an example of using a <code>TextExtensionExtension</code> 

 * with the extended listeners:

 * <code><pre>

 * TextExtensionExtension text = new TextExtensionExtension(shell, SWT.LEFT, TextExtension.EMAILADDRESS);

 * text.setText("address@site.com");

 *      

 * text.addListener(SWTExtension.CaretMoved, new Listener() {

 *     public void handleEvent(Event event) {

 *         System.out.println("Caret moved, new position "+event.x);

 *     }});

 *      

 * text.addListener(SWTExtension.ContentSelected, new Listener() {

 *     public void handleEvent(Event event) {

 *         System.out.println("Selection changed, pos "+event.x+", len "+event.count);

 *     }});

 * </pre></code></p>

 */

public class TextExtensionExtension extends TextExtension {

	// Bit set to make sure API extension styles don't overlap with the official API

	private static final int TEXTEXTENSIONEXTENSIONSTYLEBIT = 0x80000000;

	private int validator;

	/**

	 * NUMERIC, DECIMAL, PHONENUMBER values can be used in the extensionStyle

	 * constructor parameter to set the corresponding constraints. In the

	 * eSWT API these constraints are only supported by ConstrainedText which

	 * is a single line editor. For a multi-line editor with these constraints

	 * this API extension can be used. 

	 */

	public static final int NUMERIC = 1|TEXTEXTENSIONEXTENSIONSTYLEBIT;

	public static final int DECIMAL = 2|TEXTEXTENSIONEXTENSIONSTYLEBIT;

	public static final int PHONENUMBER = 3|TEXTEXTENSIONEXTENSIONSTYLEBIT;

    public TextExtensionExtension(Composite parent, int style) {

        this(parent, style, 0);

    }

    public TextExtensionExtension(Composite parent, int style, int extensionStyle) {

        super(parent, style, checkExtensionStyle(extensionStyle), true);

        int topHandle = Internal_PackageSupport.topHandle(this);

    	int newHints, oldHints;

    	newHints = oldHints = OS.QWidget_inputMethodHints(topHandle);

        switch(extensionStyle) {

        case TextExtensionExtension.NUMERIC:

        	newHints |= OS.QT_IMHDIGITSONLY;

        	// Intermediate restriction: anything that builds up to a valid integer is allowed

            // I.E.: You can have + alone, since it is the beginning of a positive integer

            validator = OS.QRegExpValidator_new(topHandle, "[\\+\\-]?\\d*");

        	break;

        case TextExtensionExtension.DECIMAL:

        	newHints |= OS.QT_IMHFORMATTEDNUMBERSONLY;

        	// Intermediate restriction: anything that builds up to a valid real is allowed

            // I.E.: You can have '-.' alone, since it is the beginning of a negative real but

            // cannot have 'E' since a exponential notation needs a valid real before E 

            validator = OS.QRegExpValidator_new(topHandle, "[\\+\\-]?\\d*(\\.?(\\d+([eE][\\+\\-]?\\d*)?)?)?");

        	break;

        case TextExtensionExtension.PHONENUMBER:

        	newHints |= OS.QT_IMHDIALABLECHARACTERSONLY;

        	// Very loose restriction: any of the chars in the set allowed in any order and amount

            validator = OS.QRegExpValidator_new(topHandle, "[\\+\\d\\sABCD,TP!W@;>IiGg\\*\\#\\.\\(\\)\\/\\-]*");

        	break;

    	default:

       		break;

        }

        if(oldHints != newHints) {

        	OS.QWidget_setInputMethodHints(topHandle, newHints);

        }

    }

    /**

     * Adds the listener to the collection of listeners who will

     * be notified when an event of the given type occurs. When the

     * event does occur in the widget, the listener is notified by

     * sending it the <code>handleEvent()</code> message. The event

     * type is one of the event constants defined in class <code>SWT</code>.

     * 

     * To listen to caret moved event, add a listener of type 

     * <code>SWTExtension.CaretMoved</code>. New position of the caret is placed

     * in <code>event.x</code>.

     *

     * To listen to content selection event, add a listener of type

     * <code>SWTExtension.ContentSelected</code>. Index of the first selected 

     * character is placed in <code>event.x</code>, number of selected characters 

     * is placed in <code>event.count</code>.

     *

     * @param eventType the type of event to listen for

     * @param listener the listener which should be notified when the event occurs

     *

     * @exception IllegalArgumentException <ul>

     *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>

     * </ul>

     * @exception SWTException <ul>

     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>

     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>

     * </ul>

     *

     * @see Listener

     * @see SWTExtension

     * @see Event

     * @see #removeListener(int, Listener)

     * @see #notifyListeners

     */

    public void addListener(int eventType, Listener listener) {

        super.addListener(eventType, listener);

    }

    private static final int checkExtensionStyle(int style) {

    	style &= ~(NUMERIC|DECIMAL|PHONENUMBER);

    	return style;

    }

    public String fetchPhoneNumber() {

        return Internal_PackageSupport.getPhoneNumber(this);

    }

    public void launchDialer(String phoneNumber) {

     }    

	/**

	 * Doesn't do anything if one of NUMERIC, DECIMAL, PHONENUMBER was

	 * specified. Otherwise calls TextExtension.setInitialInputMode. 

	 */

	public void setInitialInputMode(int casingModifier, String mode) {

		int hints = OS.QWidget_inputMethodHints(Internal_PackageSupport.topHandle(this));

		if((hints & (OS.QT_IMHDIGITSONLY|

				     OS.QT_IMHFORMATTEDNUMBERSONLY|

				     OS.QT_IMHDIALABLECHARACTERSONLY)) == 0) {

			super.setInitialInputMode(casingModifier, mode);

		}

	}

	public void setText (String string) {

		checkWidget();

		if ((Internal_PackageSupport.extraStyle(this) & (TextExtensionExtension.PHONENUMBER|TextExtensionExtension.DECIMAL|

				 TextExtensionExtension.NUMERIC)) != 0) {

			 boolean valid = OS.QValidator_validate(validator, string);

			 if (valid) {

				 super.setText(string);

			 }

			 else if ((Internal_PackageSupport.extraStyle(this) & (TextExtensionExtension.DECIMAL|

						 TextExtensionExtension.NUMERIC)) != 0) {

					 SWT.error(SWT.ERROR_INVALID_ARGUMENT);

			 }

		 } else{

			 super.setText(string);

		 }

	}

	public void insert(String string) {

	    checkWidget();

	    if ((Internal_PackageSupport.extraStyle(this) & (TextExtensionExtension.PHONENUMBER|

	    		TextExtensionExtension.DECIMAL|TextExtensionExtension.NUMERIC)) != 0) {

			 boolean valid = OS.QValidator_validate(validator, string);

			 if (valid) {

				 super.insert(string);

			 }

			 else if ((Internal_PackageSupport.extraStyle(this) & (TextExtensionExtension.DECIMAL|

					 TextExtensionExtension.NUMERIC)) != 0) {

					 SWT.error(SWT.ERROR_INVALID_ARGUMENT);

			 }

		 } else{

			 super.insert(string);

		 }

	}

	public void append(String string) {

	    checkWidget();

	    if ((Internal_PackageSupport.extraStyle(this) & (TextExtensionExtension.PHONENUMBER|

	    		TextExtensionExtension.DECIMAL|TextExtensionExtension.NUMERIC)) != 0) {

			 boolean valid = OS.QValidator_validate(validator, string);

			 if (valid) {

				 super.append(string);

			 }

			 else if ((Internal_PackageSupport.extraStyle(this) & (TextExtensionExtension.DECIMAL|

						 TextExtensionExtension.NUMERIC)) != 0) {

				 SWT.error(SWT.ERROR_INVALID_ARGUMENT);

			 }

		 } else {

			 super.append(string);

		 }

	}

	public void paste() {

	    checkWidget();

	    if ((Internal_PackageSupport.extraStyle(this) & (TextExtensionExtension.PHONENUMBER|

	    		TextExtensionExtension.DECIMAL|TextExtensionExtension.NUMERIC)) != 0) {

			 boolean valid = OS.QValidator_validate(validator, OS.QClipboard_text());

			 if (valid) {

				 super.paste();

			 }

			 else if ((Internal_PackageSupport.extraStyle(this) & (TextExtensionExtension.DECIMAL|

						 TextExtensionExtension.NUMERIC)) != 0) {

				 SWT.error(SWT.ERROR_INVALID_ARGUMENT);

			 }

		 }else {

			 super.paste();

		 }

	}

}