/*

* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

package com.nokia.microedition.m2g;

import org.w3c.dom.*;

import org.w3c.dom.svg.*;

import java.io.IOException;

import com.nokia.mj.impl.utils.Logger;

public class M2GSVGSVGElement extends M2GSVGLocatableElement implements SVGSVGElement

{

    //--------------------------------------------------

    // STATIC CONSTANTS

    //--------------------------------------------------

    /* Optimization: static finals changed to local variables

    public static final String INVALID_SVG_VERSION_ESTR =

      "Invalid version.";

    public static final String INVALID_SVG_BASE_PROFILE_ESTR =

      "Invalid base profile.";

    */

    //------------------------------------------------------------------

    // VARIABLES

    //------------------------------------------------------------------

    // Exception text

    public static final String SCALE_BY_ZERO =

        "Cannot scale by 0.";

    //------------------------------------------------------------------

    // VARIABLES

    //------------------------------------------------------------------

    private Object iTimeGuard;

    private M2GSVGMatrix iMatrix;

    private M2GSVGPoint iCurrentTranslatePoint;

    private float iCurrentRotate;

    private float iCurrentScale;

    private float iCurrentTimeInSeconds;

    //------------------------------------------------------------------

    // METHODS

    //------------------------------------------------------------------

    /**

     * Constructor

     * @param aHandle -

     * @param aDocument -

     */

    protected M2GSVGSVGElement(int aHandle, M2GDocument aDocument)

    {

        super(aHandle, aDocument);

        iTimeGuard = new Object();

        iMatrix = (M2GSVGMatrix)createSVGMatrixComponents(1f, 0f, 0f, 1f, 0f, 0f);

        iCurrentTranslatePoint = new M2GSVGPoint(this);

        iCurrentRotate = 0.0f;

        iCurrentScale = 1.0f;

        iCurrentTimeInSeconds = 0.0f;

        refreshMatrix();

    }

    /**

     * @see org.w3c.dom.svg.SVGSVGElement#createSVGMatrixComponents()

     */

    public SVGMatrix createSVGMatrixComponents(

        float a, float b, float c, float d, float e, float f)

    {

        return new M2GSVGMatrix(a, b, c, d, e, f);

    }

    /**

       * @see org.w3c.dom.svg.SVGSVGElement#createSVGMatrixComponents()

     */

    public SVGPath createSVGPath()

    {

        return new M2GSVGPath(

                   M2GSVGPath._createPath(getNativeSVGProxyHandle()));

    }

    /**

       * @see org.w3c.dom.svg.SVGSVGElement#createSVGRect()

     */

    public SVGRect createSVGRect()

    {

        return new M2GSVGRect();

    }

    /**

       * @see org.w3c.dom.svg.SVGSVGElement#SVGRGBColor()

     */

    public SVGRGBColor createSVGRGBColor(int red, int green, int blue)

    {

        return new M2GSVGRGBColor(red, green, blue);

    }

    /**

       * @see com.nokia.microedition.m2g.M2GObject#doCleanup()

     */

    protected void doCleanup()

    {

        // Note this method is not automatically called if

        // doConstruct() method is not first called

        super.doCleanup();

    }

    /**

     * @see com.nokia.microedition.m2g.M2GObject#getCurrentRotate()

     */

    public float getCurrentRotate()

    {

        synchronized (this)

        {

            return iCurrentRotate;

        }

    }

    /**

     * @see com.nokia.microedition.m2g.M2GObject#getCurrentScale()

     */

    public float getCurrentScale()

    {

        synchronized (this)

        {

            return iCurrentScale;

        }

    }

    /**

     * @see com.nokia.microedition.m2g.M2GObject#getCurrentTime()

     */

    public float getCurrentTime()

    {

        synchronized (iTimeGuard)

        {

            return iCurrentTimeInSeconds;

        }

    }

    /**

       * @see com.nokia.microedition.m2g.M2GObject#getCurrentTranslate()

     */

    public SVGPoint getCurrentTranslate()

    {

        return iCurrentTranslatePoint;

    }

    /**

     * @org.w3c.dom.Node#getParentNode()

    */

    public Node getParentNode()

    {

        // Optimization: if(!getDocument().getConnectionPolicy().getAccessRight())

        if (!iDocument.iConnectionRight)

        {

            Logger.ELOG(Logger.EJavaUI, "getParentNode() - access rights failure");

            throw new SecurityException(M2GSVGConstants.ACCESS_RIGHTS_ESTR);

        }

        return null;

    }

    /**

     * Check svg version and base profile

     * @throws IOException If version or profile is invalid

    */

    public void checkVersionAndProfile() throws IOException

    {

        // Check version

        String trait = _getStringTrait(

                           getNativeSVGProxyHandle(),

                           getHandle(),

                           M2GSVGConstants.AT_VERSION);

        if (trait != null && (!trait.equals(

                                  M2GSVGConstants.getInstance().iSvgBaseProfileVersion)))

        {

            Logger.ELOG(Logger.EJavaUI, "doCheckValidity() - excption: svg version");

            throw new IOException(/*SF*/"Invalid version."/*SF*/);

        }

        // Check profile

        trait = _getStringTrait(

                    getNativeSVGProxyHandle(),

                    getHandle(),

                    M2GSVGConstants.AT_BASEPROFILE);

        if (trait != null && (!trait.equals(

                                  M2GSVGConstants.getInstance().iSvgBaseProfileName)))

        {

            Logger.ELOG(Logger.EJavaUI, "doCheckValidity() - excption: svg base profile");

            throw new IOException(/*SF*/"Invalid base profile."/*SF*/);

        }

    }

    /**

     * @javax.microedition.m2g.SVGImage#incrementTime()

     */

    public void incrementTime(float seconds)

    {

        incrementTimeNoUpdate(seconds);

        // update the media time to SVG engine

        updateTime();

    }

    /**

     * Increments the animation or media timeline for this SVGImage (in seconds)

     * but it does not update it to the SVG engine

     *

     * @note the time is updated to the engine during M2GScalableGraphics.RenderFrame()

     * @param seconds the value of time to increment in seconds

     *

     * @since S60 3.1

     */

    public void incrementTimeNoUpdate(float seconds)

    {

        if (seconds < 0)

        {

            throw new IllegalArgumentException();

        }

        if (Float.isNaN(iCurrentTimeInSeconds + seconds))

        {

            throw new IllegalArgumentException();

        }

        synchronized (iTimeGuard)

        {

            iCurrentTimeInSeconds += seconds;

        }

    }

    /**

     * Sets matrix trait

     */

    protected void refreshMatrix()

    {

        float matrixComponents[] = new float[M2GSVGMatrix.ARRAY_SIZE];

        synchronized (this)

        {

            iMatrix.getComponentsToArray(matrixComponents);

        }

        M2GSVGElement._setMatrixTrait(

             getNativeSVGProxyHandle(), getHandle(),

            M2GSVGConstants.AT_TRANSFORM, matrixComponents);

        // inform observer about changes in DOM

        iDocument.notifyDOMChangeObserver();

    }

    /**

     * Updates the time to engine

     */

    private void updateTime()

    {

        float currentTimeInSeconds = 0.0f;

        synchronized (iTimeGuard)

        {

            currentTimeInSeconds = iCurrentTimeInSeconds;

        }

        _setMediaTime(getNativeSVGProxyHandle(),

                      getDocument().getHandle(), currentTimeInSeconds);

        // inform observer about changes in DOM

        iDocument.notifyDOMChangeObserver();

    }

    /**

     * @see com.nokia.microedition.m2g.M2GObject#setCurrentRotate()

     */

    public void setCurrentRotate(float value)

    {

        String zoomAndPan = getTrait("zoomAndPan");

        if ((zoomAndPan != null) && zoomAndPan.equals("disable"))

        {

            Logger.LOG(Logger.EJavaUI, Logger.EInfo,

                       "setCurrentRotate() - zoomAndPan:" + zoomAndPan + ", fail");

            return;

        }

        synchronized (this)

        {

            iCurrentRotate = value;

            updateTransformMatrix();

        }

    }

    /**

     * @see com.nokia.microedition.m2g.M2GObject#setCurrentScale()

     */

    public void setCurrentScale(float value)

    {

        String zoomAndPan = getTrait("zoomAndPan");

        if ((zoomAndPan != null) && zoomAndPan.equals("disable"))

        {

            Logger.LOG(Logger.EJavaUI, Logger.EInfo,

                       "setCurrentScale() - zoomAndPan:" + zoomAndPan + ", fail");

            return;

        }

        if (value == 0)

        {

            throw new DOMException(DOMException.INVALID_ACCESS_ERR, SCALE_BY_ZERO);

        }

        synchronized (this)

        {

            iCurrentScale = value;

            updateTransformMatrix();

        }

    }

    /**

       * @see org.w3c.dom.svg.SVGSVGElement#setCurrentTime()

       * @note no support for setting the time backwards except for setting it to zero

       * @note engine resets the animation if current time is zero

     */

    public void setCurrentTime(float newSeconds)

    {

        synchronized (iTimeGuard)

        {

            if (newSeconds <= iCurrentTimeInSeconds && newSeconds != 0)

            {

                // only forward time or zero time is accepted

                return;

            }

            iCurrentTimeInSeconds = newSeconds;

        }

        updateTime();

    }

    /**

     * <pre>

     *  [currentScale      0       currentTranslate.x]   [cos(currentRotate) -sin(currentRotate 0]

     *  [     0      currentScale  currentTranslate.y] x [sin(currentRotate) cos(currentRotate) 0]

     *  [     0            0               1         ]   [         0                  0         1]

     * </pre>

     */

    public void updateTransformMatrix()

    {

        synchronized (this)

        {

            M2GSVGMatrix a = new M2GSVGMatrix(

                iCurrentScale, 0f, 0f, iCurrentScale,

                iCurrentTranslatePoint.getX(), iCurrentTranslatePoint.getY());

            M2GSVGMatrix b = new M2GSVGMatrix(

                (float)Math.cos(iCurrentRotate *(float)Math.PI / 180.0f),

                (float)Math.sin(iCurrentRotate *(float)Math.PI / 180.0f),

                -(float)Math.sin(iCurrentRotate *(float)Math.PI / 180.0f),

                (float)Math.cos(iCurrentRotate *(float)Math.PI / 180.0f),

                0f, 0f);

            iMatrix = (M2GSVGMatrix)(a.mMultiply(b));

            refreshMatrix();

        }

    }

    //------------------------------------------------------------------

    // STATIC METHODS

    //------------------------------------------------------------------

    /**

     * Builds root element according to a document

     * @param aDocument

     * @return root element

     */

    public static M2GSVGSVGElement buildRootElement(M2GDocument aDocument)

    {

        // Get native handle

        int elementHandle = M2GSVGElement._getRootElement(

                                aDocument.getNativeSVGProxyHandle(),

                                aDocument.getHandle());

        // Check native handle

        if (!M2GObject.checkHandle(elementHandle))

        {

            return null;

        }

        // Create object

        M2GSVGSVGElement rootElement =

            new M2GSVGSVGElement(elementHandle, aDocument);

        if (rootElement != null)

        {

            // Register element

            aDocument.registerLiveElement(rootElement, new Integer(elementHandle));

        }

        return rootElement;

    }

    //------------------------------------------------------------------

    // NATIVE METHODS

    //------------------------------------------------------------------

    protected native static float _getMediaTime(

         int aSvgProxyHandle, int aDocumentHandle);

    private native static void _setMediaTime(

        int aSvgProxyHandle, int aDocumentHandle,

        float aSeconds );

}