src/com/android/mms/model/SlideshowModel.java - platform/packages/apps/Mms - Git at Google

 /*
  * Copyright (C) 2008 Esmertec AG.
  * Copyright (C) 2008 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.mms.model;


 import com.android.mms.ContentRestrictionException;
 import com.android.mms.ExceedMessageSizeException;
 import com.android.mms.LogTag;
 import com.android.mms.MmsConfig;
 import com.android.mms.R;
 import com.android.mms.dom.smil.parser.SmilXmlSerializer;
 import android.drm.mobile1.DrmException;
 import com.android.mms.drm.DrmWrapper;
 import com.android.mms.layout.LayoutManager;
 import com.google.android.mms.ContentType;
 import com.google.android.mms.MmsException;
 import com.google.android.mms.pdu.GenericPdu;
 import com.google.android.mms.pdu.MultimediaMessagePdu;
 import com.google.android.mms.pdu.PduBody;
 import com.google.android.mms.pdu.PduHeaders;
 import com.google.android.mms.pdu.PduPart;
 import com.google.android.mms.pdu.PduPersister;

 import org.w3c.dom.NodeList;
 import org.w3c.dom.events.EventTarget;
 import org.w3c.dom.smil.SMILDocument;
 import org.w3c.dom.smil.SMILElement;
 import org.w3c.dom.smil.SMILLayoutElement;
 import org.w3c.dom.smil.SMILMediaElement;
 import org.w3c.dom.smil.SMILParElement;
 import org.w3c.dom.smil.SMILRegionElement;
 import org.w3c.dom.smil.SMILRootLayoutElement;

 import android.content.ContentUris;
 import android.content.Context;
 import android.net.Uri;
 import android.text.TextUtils;
 import android.util.Log;
 import android.widget.Toast;

 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Iterator;
 import java.util.List;
 import java.util.ListIterator;

 public class SlideshowModel extends Model
         implements List<SlideModel>, IModelChangedObserver {
     private static final String TAG = "Mms/slideshow";

     private final LayoutModel mLayout;
     private final ArrayList<SlideModel> mSlides;
     private SMILDocument mDocumentCache;
     private PduBody mPduBodyCache;
     private int mCurrentMessageSize;    // This is the current message size, not including
                                         // attachments that can be resized (such as photos)
     private int mTotalMessageSize;      // This is the computed total message size
     private Context mContext;

     // amount of space to leave in a slideshow for text and overhead.
     public static final int SLIDESHOW_SLOP = 1024;

     private SlideshowModel(Context context) {
         mLayout = new LayoutModel();
         mSlides = new ArrayList<SlideModel>();
         mContext = context;
     }

     private SlideshowModel (
             LayoutModel layouts, ArrayList<SlideModel> slides,
             SMILDocument documentCache, PduBody pbCache,
             Context context) {
         mLayout = layouts;
         mSlides = slides;
         mContext = context;

         mDocumentCache = documentCache;
         mPduBodyCache = pbCache;
         for (SlideModel slide : mSlides) {
             increaseMessageSize(slide.getSlideSize());
             slide.setParent(this);
         }
     }

     public static SlideshowModel createNew(Context context) {
         return new SlideshowModel(context);
     }

     public static SlideshowModel createFromMessageUri(
             Context context, Uri uri) throws MmsException {
         return createFromPduBody(context, getPduBody(context, uri));
     }

     public static SlideshowModel createFromPduBody(Context context, PduBody pb) throws MmsException {
         SMILDocument document = SmilHelper.getDocument(pb);

         // Create root-layout model.
         SMILLayoutElement sle = document.getLayout();
         SMILRootLayoutElement srle = sle.getRootLayout();
         int w = srle.getWidth();
         int h = srle.getHeight();
         if ((w == 0) || (h == 0)) {
             w = LayoutManager.getInstance().getLayoutParameters().getWidth();
             h = LayoutManager.getInstance().getLayoutParameters().getHeight();
             srle.setWidth(w);
             srle.setHeight(h);
         }
         RegionModel rootLayout = new RegionModel(
                 null, 0, 0, w, h);

         // Create region models.
         ArrayList<RegionModel> regions = new ArrayList<RegionModel>();
         NodeList nlRegions = sle.getRegions();
         int regionsNum = nlRegions.getLength();

         for (int i = 0; i < regionsNum; i++) {
             SMILRegionElement sre = (SMILRegionElement) nlRegions.item(i);
             RegionModel r = new RegionModel(sre.getId(), sre.getFit(),
                     sre.getLeft(), sre.getTop(), sre.getWidth(), sre.getHeight(),
                     sre.getBackgroundColor());
             regions.add(r);
         }
         LayoutModel layouts = new LayoutModel(rootLayout, regions);

         // Create slide models.
         SMILElement docBody = document.getBody();
         NodeList slideNodes = docBody.getChildNodes();
         int slidesNum = slideNodes.getLength();
         ArrayList<SlideModel> slides = new ArrayList<SlideModel>(slidesNum);
         int totalMessageSize = 0;

         for (int i = 0; i < slidesNum; i++) {
             // FIXME: This is NOT compatible with the SMILDocument which is
             // generated by some other mobile phones.
             SMILParElement par = (SMILParElement) slideNodes.item(i);

             // Create media models for each slide.
             NodeList mediaNodes = par.getChildNodes();
             int mediaNum = mediaNodes.getLength();
             ArrayList<MediaModel> mediaSet = new ArrayList<MediaModel>(mediaNum);

             for (int j = 0; j < mediaNum; j++) {
                 SMILMediaElement sme = (SMILMediaElement) mediaNodes.item(j);
                 try {
                     MediaModel media = MediaModelFactory.getMediaModel(
                             context, sme, layouts, pb);

                     /*
                     * This is for slide duration value set.
                     * If mms server does not support slide duration.
                     */
                     if (!MmsConfig.getSlideDurationEnabled()) {
                         int mediadur = media.getDuration();
                         float dur = par.getDur();
                         if (dur == 0) {
                             mediadur = MmsConfig.getMinimumSlideElementDuration() * 1000;
                             media.setDuration(mediadur);
                         }

                         if ((int)mediadur / 1000 != dur) {
                             String tag = sme.getTagName();

                             if (ContentType.isVideoType(media.mContentType)
                               || tag.equals(SmilHelper.ELEMENT_TAG_VIDEO)
                               || ContentType.isAudioType(media.mContentType)
                               || tag.equals(SmilHelper.ELEMENT_TAG_AUDIO)) {
                                 /*
                                 * add 1 sec to release and close audio/video
                                 * for guaranteeing the audio/video playing.
                                 * because the mmsc does not support the slide duration.
                                 */
                                 par.setDur((float)mediadur / 1000 + 1);
                             } else {
                                 /*
                                 * If a slide has an image and an audio/video element
                                 * and the audio/video element has longer duration than the image,
                                 * The Image disappear before the slide play done. so have to match
                                 * an image duration to the slide duration.
                                 */
                                 if ((int)mediadur / 1000 < dur) {
                                     media.setDuration((int)dur * 1000);
                                 } else {
                                     if ((int)dur != 0) {
                                         media.setDuration((int)dur * 1000);
                                     } else {
                                         par.setDur((float)mediadur / 1000);
                                     }
                                 }
                             }
                         }
                     }
                     SmilHelper.addMediaElementEventListeners(
                             (EventTarget) sme, media);
                     mediaSet.add(media);
                     totalMessageSize += media.getMediaSize();
                 } catch (DrmException e) {
                     Log.e(TAG, e.getMessage(), e);
                 } catch (IOException e) {
                     Log.e(TAG, e.getMessage(), e);
                 } catch (IllegalArgumentException e) {
                     Log.e(TAG, e.getMessage(), e);
                 }
             }

             SlideModel slide = new SlideModel((int) (par.getDur() * 1000), mediaSet);
             slide.setFill(par.getFill());
             SmilHelper.addParElementEventListeners((EventTarget) par, slide);
             slides.add(slide);
         }

         SlideshowModel slideshow = new SlideshowModel(layouts, slides, document, pb, context);
         slideshow.mTotalMessageSize = totalMessageSize;
         slideshow.registerModelChangedObserver(slideshow);
         return slideshow;
     }

     public PduBody toPduBody() {
         if (mPduBodyCache == null) {
             mDocumentCache = SmilHelper.getDocument(this);
             mPduBodyCache = makePduBody(mDocumentCache);
         }
         return mPduBodyCache;
     }

     private PduBody makePduBody(SMILDocument document) {
         return makePduBody(null, document, false);
     }

     private PduBody makePduBody(Context context, SMILDocument document, boolean isMakingCopy) {
         PduBody pb = new PduBody();

         boolean hasForwardLock = false;
         for (SlideModel slide : mSlides) {
             for (MediaModel media : slide) {
                 if (isMakingCopy) {
                     if (media.isDrmProtected() && !media.isAllowedToForward()) {
                         hasForwardLock = true;
                         continue;
                     }
                 }

                 PduPart part = new PduPart();

                 if (media.isText()) {
                     TextModel text = (TextModel) media;
                     // Don't create empty text part.
                     if (TextUtils.isEmpty(text.getText())) {
                         continue;
                     }
                     // Set Charset if it's a text media.
                     part.setCharset(text.getCharset());
                 }

                 // Set Content-Type.
                 part.setContentType(media.getContentType().getBytes());

                 String src = media.getSrc();
                 String location;
                 boolean startWithContentId = src.startsWith("cid:");
                 if (startWithContentId) {
                     location = src.substring("cid:".length());
                 } else {
                     location = src;
                 }

                 // Set Content-Location.
                 part.setContentLocation(location.getBytes());

                 // Set Content-Id.
                 if (startWithContentId) {
                     //Keep the original Content-Id.
                     part.setContentId(location.getBytes());
                 }
                 else {
                     int index = location.lastIndexOf(".");
                     String contentId = (index == -1) ? location
                             : location.substring(0, index);
                     part.setContentId(contentId.getBytes());
                 }

                 if (media.isDrmProtected()) {
                     DrmWrapper wrapper = media.getDrmObject();
                     part.setDataUri(wrapper.getOriginalUri());
                     part.setData(wrapper.getOriginalData());
                 } else if (media.isText()) {
                     part.setData(((TextModel) media).getText().getBytes());
                 } else if (media.isImage() || media.isVideo() || media.isAudio()) {
                     part.setDataUri(media.getUri());
                 } else {
                     Log.w(TAG, "Unsupport media: " + media);
                 }

                 pb.addPart(part);
             }
         }

         if (hasForwardLock && isMakingCopy && context != null) {
             Toast.makeText(context,
                     context.getString(R.string.cannot_forward_drm_obj),
                     Toast.LENGTH_LONG).show();
             document = SmilHelper.getDocument(pb);
         }

         // Create and insert SMIL part(as the first part) into the PduBody.
         ByteArrayOutputStream out = new ByteArrayOutputStream();
         SmilXmlSerializer.serialize(document, out);
         PduPart smilPart = new PduPart();
         smilPart.setContentId("smil".getBytes());
         smilPart.setContentLocation("smil.xml".getBytes());
         smilPart.setContentType(ContentType.APP_SMIL.getBytes());
         smilPart.setData(out.toByteArray());
         pb.addPart(0, smilPart);

         return pb;
     }

     public PduBody makeCopy(Context context) {
         return makePduBody(context, SmilHelper.getDocument(this), true);
     }

     public SMILDocument toSmilDocument() {
         if (mDocumentCache == null) {
             mDocumentCache = SmilHelper.getDocument(this);
         }
         return mDocumentCache;
     }

     public static PduBody getPduBody(Context context, Uri msg) throws MmsException {
         PduPersister p = PduPersister.getPduPersister(context);
         GenericPdu pdu = p.load(msg);

         int msgType = pdu.getMessageType();
         if ((msgType == PduHeaders.MESSAGE_TYPE_SEND_REQ)
                 || (msgType == PduHeaders.MESSAGE_TYPE_RETRIEVE_CONF)) {
             return ((MultimediaMessagePdu) pdu).getBody();
         } else {
             throw new MmsException();
         }
     }

     public void setCurrentMessageSize(int size) {
         mCurrentMessageSize = size;
     }

     // getCurrentMessageSize returns the size of the message, not including resizable attachments
     // such as photos. mCurrentMessageSize is used when adding/deleting/replacing non-resizable
     // attachments (movies, sounds, etc) in order to compute how much size is left in the message.
     // The difference between mCurrentMessageSize and the maxSize allowed for a message is then
     // divided up between the remaining resizable attachments. While this function is public,
     // it is only used internally between various MMS classes. If the UI wants to know the
     // size of a MMS message, it should call getTotalMessageSize() instead.
     public int getCurrentMessageSize() {
         return mCurrentMessageSize;
     }

     // getTotalMessageSize returns the total size of the message, including resizable attachments
     // such as photos. This function is intended to be used by the UI for displaying the size of the
     // MMS message.
     public int getTotalMessageSize() {
         return mTotalMessageSize;
     }

     public void increaseMessageSize(int increaseSize) {
         if (increaseSize > 0) {
             mCurrentMessageSize += increaseSize;
         }
     }

     public void decreaseMessageSize(int decreaseSize) {
         if (decreaseSize > 0) {
             mCurrentMessageSize -= decreaseSize;
         }
     }

     public LayoutModel getLayout() {
         return mLayout;
     }

     //
     // Implement List<E> interface.
     //
     public boolean add(SlideModel object) {
         int increaseSize = object.getSlideSize();
         checkMessageSize(increaseSize);

         if ((object != null) && mSlides.add(object)) {
             increaseMessageSize(increaseSize);
             object.registerModelChangedObserver(this);
             for (IModelChangedObserver observer : mModelChangedObservers) {
                 object.registerModelChangedObserver(observer);
             }
             notifyModelChanged(true);
             return true;
         }
         return false;
     }

     public boolean addAll(Collection<? extends SlideModel> collection) {
         throw new UnsupportedOperationException("Operation not supported.");
     }

     public void clear() {
         if (mSlides.size() > 0) {
             for (SlideModel slide : mSlides) {
                 slide.unregisterModelChangedObserver(this);
                 for (IModelChangedObserver observer : mModelChangedObservers) {
                     slide.unregisterModelChangedObserver(observer);
                 }
             }
             mCurrentMessageSize = 0;
             mSlides.clear();
             notifyModelChanged(true);
         }
     }

     public boolean contains(Object object) {
         return mSlides.contains(object);
     }

     public boolean containsAll(Collection<?> collection) {
         return mSlides.containsAll(collection);
     }

     public boolean isEmpty() {
         return mSlides.isEmpty();
     }

     public Iterator<SlideModel> iterator() {
         return mSlides.iterator();
     }

     public boolean remove(Object object) {
         if ((object != null) && mSlides.remove(object)) {
             SlideModel slide = (SlideModel) object;
             decreaseMessageSize(slide.getSlideSize());
             slide.unregisterAllModelChangedObservers();
             notifyModelChanged(true);
             return true;
         }
         return false;
     }

     public boolean removeAll(Collection<?> collection) {
         throw new UnsupportedOperationException("Operation not supported.");
     }

     public boolean retainAll(Collection<?> collection) {
         throw new UnsupportedOperationException("Operation not supported.");
     }

     public int size() {
         return mSlides.size();
     }

     public Object[] toArray() {
         return mSlides.toArray();
     }

     public <T> T[] toArray(T[] array) {
         return mSlides.toArray(array);
     }

     public void add(int location, SlideModel object) {
         if (object != null) {
             int increaseSize = object.getSlideSize();
             checkMessageSize(increaseSize);

             mSlides.add(location, object);
             increaseMessageSize(increaseSize);
             object.registerModelChangedObserver(this);
             for (IModelChangedObserver observer : mModelChangedObservers) {
                 object.registerModelChangedObserver(observer);
             }
             notifyModelChanged(true);
         }
     }

     public boolean addAll(int location,
             Collection<? extends SlideModel> collection) {
         throw new UnsupportedOperationException("Operation not supported.");
     }

     public SlideModel get(int location) {
         return (location >= 0 && location < mSlides.size()) ? mSlides.get(location) : null;
     }

     public int indexOf(Object object) {
         return mSlides.indexOf(object);
     }

     public int lastIndexOf(Object object) {
         return mSlides.lastIndexOf(object);
     }

     public ListIterator<SlideModel> listIterator() {
         return mSlides.listIterator();
     }

     public ListIterator<SlideModel> listIterator(int location) {
         return mSlides.listIterator(location);
     }

     public SlideModel remove(int location) {
         SlideModel slide = mSlides.remove(location);
         if (slide != null) {
             decreaseMessageSize(slide.getSlideSize());
             slide.unregisterAllModelChangedObservers();
             notifyModelChanged(true);
         }
         return slide;
     }

     public SlideModel set(int location, SlideModel object) {
         SlideModel slide = mSlides.get(location);
         if (null != object) {
             int removeSize = 0;
             int addSize = object.getSlideSize();
             if (null != slide) {
                 removeSize = slide.getSlideSize();
             }
             if (addSize > removeSize) {
                 checkMessageSize(addSize - removeSize);
                 increaseMessageSize(addSize - removeSize);
             } else {
                 decreaseMessageSize(removeSize - addSize);
             }
         }

         slide =  mSlides.set(location, object);
         if (slide != null) {
             slide.unregisterAllModelChangedObservers();
         }

         if (object != null) {
             object.registerModelChangedObserver(this);
             for (IModelChangedObserver observer : mModelChangedObservers) {
                 object.registerModelChangedObserver(observer);
             }
         }

         notifyModelChanged(true);
         return slide;
     }

     public List<SlideModel> subList(int start, int end) {
         return mSlides.subList(start, end);
     }

     @Override
     protected void registerModelChangedObserverInDescendants(
             IModelChangedObserver observer) {
         mLayout.registerModelChangedObserver(observer);

         for (SlideModel slide : mSlides) {
             slide.registerModelChangedObserver(observer);
         }
     }

     @Override
     protected void unregisterModelChangedObserverInDescendants(
             IModelChangedObserver observer) {
         mLayout.unregisterModelChangedObserver(observer);

         for (SlideModel slide : mSlides) {
             slide.unregisterModelChangedObserver(observer);
         }
     }

     @Override
     protected void unregisterAllModelChangedObserversInDescendants() {
         mLayout.unregisterAllModelChangedObservers();

         for (SlideModel slide : mSlides) {
             slide.unregisterAllModelChangedObservers();
         }
     }

     public void onModelChanged(Model model, boolean dataChanged) {
         if (dataChanged) {
             mDocumentCache = null;
             mPduBodyCache = null;
         }
     }

     public void sync(PduBody pb) {
         for (SlideModel slide : mSlides) {
             for (MediaModel media : slide) {
                 PduPart part = pb.getPartByContentLocation(media.getSrc());
                 if (part != null) {
                     media.setUri(part.getDataUri());
                 }
             }
         }
     }

     public void checkMessageSize(int increaseSize) throws ContentRestrictionException {
         ContentRestriction cr = ContentRestrictionFactory.getContentRestriction();
         cr.checkMessageSize(mCurrentMessageSize, increaseSize, mContext.getContentResolver());
     }

     /**
      * Determines whether this is a "simple" slideshow.
      * Criteria:
      * - Exactly one slide
      * - Exactly one multimedia attachment, but no audio
      * - It can optionally have a caption
     */
     public boolean isSimple() {
         // There must be one (and only one) slide.
         if (size() != 1)
             return false;

         SlideModel slide = get(0);
         // The slide must have either an image or video, but not both.
         if (!(slide.hasImage() ^ slide.hasVideo()))
             return false;

         // No audio allowed.
         if (slide.hasAudio())
             return false;

         return true;
     }

     /**
      * Make sure the text in slide 0 is no longer holding onto a reference to the text
      * in the message text box.
      */
     public void prepareForSend() {
         if (size() == 1) {
             TextModel text = get(0).getText();
             if (text != null) {
                 text.cloneText();
             }
         }
     }

     /**
      * Resize all the resizeable media objects to fit in the remaining size of the slideshow.
      * This should be called off of the UI thread.
      *
      * @throws MmsException, ExceedMessageSizeException
      */
     public void finalResize(Uri messageUri) throws MmsException, ExceedMessageSizeException {

         // Figure out if we have any media items that need to be resized and total up the
         // sizes of the items that can't be resized.
         int resizableCnt = 0;
         int fixedSizeTotal = 0;
         for (SlideModel slide : mSlides) {
             for (MediaModel media : slide) {
                 if (media.getMediaResizable()) {
                     ++resizableCnt;
                 } else {
                     fixedSizeTotal += media.getMediaSize();
                 }
             }
         }
         if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
             Log.v(TAG, "finalResize: original message size: " + getCurrentMessageSize() +
                     " getMaxMessageSize: " + MmsConfig.getMaxMessageSize() +
                     " fixedSizeTotal: " + fixedSizeTotal);
         }
         if (resizableCnt > 0) {
             int remainingSize = MmsConfig.getMaxMessageSize() - fixedSizeTotal - SLIDESHOW_SLOP;
             if (remainingSize <= 0) {
                 throw new ExceedMessageSizeException("No room for pictures");
             }
             long messageId = ContentUris.parseId(messageUri);
             int bytesPerMediaItem = remainingSize / resizableCnt;
             // Resize the resizable media items to fit within their byte limit.
             for (SlideModel slide : mSlides) {
                 for (MediaModel media : slide) {
                     if (media.getMediaResizable()) {
                         media.resizeMedia(bytesPerMediaItem, messageId);
                     }
                 }
             }
             // One last time through to calc the real message size.
             int totalSize = 0;
             for (SlideModel slide : mSlides) {
                 for (MediaModel media : slide) {
                     totalSize += media.getMediaSize();
                 }
             }
             if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
                 Log.v(TAG, "finalResize: new message size: " + totalSize);
             }

             if (totalSize > MmsConfig.getMaxMessageSize()) {
                 throw new ExceedMessageSizeException("After compressing pictures, message too big");
             }
             setCurrentMessageSize(totalSize);

             onModelChanged(this, true);     // clear the cached pdu body
             PduBody pb = toPduBody();
             // This will write out all the new parts to:
             //      /data/data/com.android.providers.telephony/app_parts
             // and at the same time delete the old parts.
             PduPersister.getPduPersister(mContext).updateParts(messageUri, pb);
         }
     }

 }
	/*
	* Copyright (C) 2008 Esmertec AG.
	* Copyright (C) 2008 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.mms.model;


	import com.android.mms.ContentRestrictionException;
	import com.android.mms.ExceedMessageSizeException;
	import com.android.mms.LogTag;
	import com.android.mms.MmsConfig;
	import com.android.mms.R;
	import com.android.mms.dom.smil.parser.SmilXmlSerializer;
	import android.drm.mobile1.DrmException;
	import com.android.mms.drm.DrmWrapper;
	import com.android.mms.layout.LayoutManager;
	import com.google.android.mms.ContentType;
	import com.google.android.mms.MmsException;
	import com.google.android.mms.pdu.GenericPdu;
	import com.google.android.mms.pdu.MultimediaMessagePdu;
	import com.google.android.mms.pdu.PduBody;
	import com.google.android.mms.pdu.PduHeaders;
	import com.google.android.mms.pdu.PduPart;
	import com.google.android.mms.pdu.PduPersister;

	import org.w3c.dom.NodeList;
	import org.w3c.dom.events.EventTarget;
	import org.w3c.dom.smil.SMILDocument;
	import org.w3c.dom.smil.SMILElement;
	import org.w3c.dom.smil.SMILLayoutElement;
	import org.w3c.dom.smil.SMILMediaElement;
	import org.w3c.dom.smil.SMILParElement;
	import org.w3c.dom.smil.SMILRegionElement;
	import org.w3c.dom.smil.SMILRootLayoutElement;

	import android.content.ContentUris;
	import android.content.Context;
	import android.net.Uri;
	import android.text.TextUtils;
	import android.util.Log;
	import android.widget.Toast;

	import java.io.ByteArrayOutputStream;
	import java.io.IOException;
	import java.util.ArrayList;
	import java.util.Collection;
	import java.util.Iterator;
	import java.util.List;
	import java.util.ListIterator;

	public class SlideshowModel extends Model
	implements List<SlideModel>, IModelChangedObserver {
	private static final String TAG = "Mms/slideshow";

	private final LayoutModel mLayout;
	private final ArrayList<SlideModel> mSlides;
	private SMILDocument mDocumentCache;
	private PduBody mPduBodyCache;
	private int mCurrentMessageSize; // This is the current message size, not including
	// attachments that can be resized (such as photos)
	private int mTotalMessageSize; // This is the computed total message size
	private Context mContext;

	// amount of space to leave in a slideshow for text and overhead.
	public static final int SLIDESHOW_SLOP = 1024;

	private SlideshowModel(Context context) {
	mLayout = new LayoutModel();
	mSlides = new ArrayList<SlideModel>();
	mContext = context;
	}

	private SlideshowModel (
	LayoutModel layouts, ArrayList<SlideModel> slides,
	SMILDocument documentCache, PduBody pbCache,
	Context context) {
	mLayout = layouts;
	mSlides = slides;
	mContext = context;

	mDocumentCache = documentCache;
	mPduBodyCache = pbCache;
	for (SlideModel slide : mSlides) {
	increaseMessageSize(slide.getSlideSize());
	slide.setParent(this);
	}
	}

	public static SlideshowModel createNew(Context context) {
	return new SlideshowModel(context);
	}

	public static SlideshowModel createFromMessageUri(
	Context context, Uri uri) throws MmsException {
	return createFromPduBody(context, getPduBody(context, uri));
	}

	public static SlideshowModel createFromPduBody(Context context, PduBody pb) throws MmsException {
	SMILDocument document = SmilHelper.getDocument(pb);

	// Create root-layout model.
	SMILLayoutElement sle = document.getLayout();
	SMILRootLayoutElement srle = sle.getRootLayout();
	int w = srle.getWidth();
	int h = srle.getHeight();
	if ((w == 0) \|\| (h == 0)) {
	w = LayoutManager.getInstance().getLayoutParameters().getWidth();
	h = LayoutManager.getInstance().getLayoutParameters().getHeight();
	srle.setWidth(w);
	srle.setHeight(h);
	}
	RegionModel rootLayout = new RegionModel(
	null, 0, 0, w, h);

	// Create region models.
	ArrayList<RegionModel> regions = new ArrayList<RegionModel>();
	NodeList nlRegions = sle.getRegions();
	int regionsNum = nlRegions.getLength();

	for (int i = 0; i < regionsNum; i++) {
	SMILRegionElement sre = (SMILRegionElement) nlRegions.item(i);
	RegionModel r = new RegionModel(sre.getId(), sre.getFit(),
	sre.getLeft(), sre.getTop(), sre.getWidth(), sre.getHeight(),
	sre.getBackgroundColor());
	regions.add(r);
	}
	LayoutModel layouts = new LayoutModel(rootLayout, regions);

	// Create slide models.
	SMILElement docBody = document.getBody();
	NodeList slideNodes = docBody.getChildNodes();
	int slidesNum = slideNodes.getLength();
	ArrayList<SlideModel> slides = new ArrayList<SlideModel>(slidesNum);
	int totalMessageSize = 0;

	for (int i = 0; i < slidesNum; i++) {
	// FIXME: This is NOT compatible with the SMILDocument which is
	// generated by some other mobile phones.
	SMILParElement par = (SMILParElement) slideNodes.item(i);

	// Create media models for each slide.
	NodeList mediaNodes = par.getChildNodes();
	int mediaNum = mediaNodes.getLength();
	ArrayList<MediaModel> mediaSet = new ArrayList<MediaModel>(mediaNum);

	for (int j = 0; j < mediaNum; j++) {
	SMILMediaElement sme = (SMILMediaElement) mediaNodes.item(j);
	try {
	MediaModel media = MediaModelFactory.getMediaModel(
	context, sme, layouts, pb);

	/*
	* This is for slide duration value set.
	* If mms server does not support slide duration.
	*/
	if (!MmsConfig.getSlideDurationEnabled()) {
	int mediadur = media.getDuration();
	float dur = par.getDur();
	if (dur == 0) {
	mediadur = MmsConfig.getMinimumSlideElementDuration() * 1000;
	media.setDuration(mediadur);
	}

	if ((int)mediadur / 1000 != dur) {
	String tag = sme.getTagName();

	if (ContentType.isVideoType(media.mContentType)
	\|\| tag.equals(SmilHelper.ELEMENT_TAG_VIDEO)
	\|\| ContentType.isAudioType(media.mContentType)
	\|\| tag.equals(SmilHelper.ELEMENT_TAG_AUDIO)) {
	/*
	* add 1 sec to release and close audio/video
	* for guaranteeing the audio/video playing.
	* because the mmsc does not support the slide duration.
	*/
	par.setDur((float)mediadur / 1000 + 1);
	} else {
	/*
	* If a slide has an image and an audio/video element
	* and the audio/video element has longer duration than the image,
	* The Image disappear before the slide play done. so have to match
	* an image duration to the slide duration.
	*/
	if ((int)mediadur / 1000 < dur) {
	media.setDuration((int)dur * 1000);
	} else {
	if ((int)dur != 0) {
	media.setDuration((int)dur * 1000);
	} else {
	par.setDur((float)mediadur / 1000);
	}
	}
	}
	}
	}
	SmilHelper.addMediaElementEventListeners(
	(EventTarget) sme, media);
	mediaSet.add(media);
	totalMessageSize += media.getMediaSize();
	} catch (DrmException e) {
	Log.e(TAG, e.getMessage(), e);
	} catch (IOException e) {
	Log.e(TAG, e.getMessage(), e);
	} catch (IllegalArgumentException e) {
	Log.e(TAG, e.getMessage(), e);
	}
	}

	SlideModel slide = new SlideModel((int) (par.getDur() * 1000), mediaSet);
	slide.setFill(par.getFill());
	SmilHelper.addParElementEventListeners((EventTarget) par, slide);
	slides.add(slide);
	}

	SlideshowModel slideshow = new SlideshowModel(layouts, slides, document, pb, context);
	slideshow.mTotalMessageSize = totalMessageSize;
	slideshow.registerModelChangedObserver(slideshow);
	return slideshow;
	}

	public PduBody toPduBody() {
	if (mPduBodyCache == null) {
	mDocumentCache = SmilHelper.getDocument(this);
	mPduBodyCache = makePduBody(mDocumentCache);
	}
	return mPduBodyCache;
	}

	private PduBody makePduBody(SMILDocument document) {
	return makePduBody(null, document, false);
	}

	private PduBody makePduBody(Context context, SMILDocument document, boolean isMakingCopy) {
	PduBody pb = new PduBody();

	boolean hasForwardLock = false;
	for (SlideModel slide : mSlides) {
	for (MediaModel media : slide) {
	if (isMakingCopy) {
	if (media.isDrmProtected() && !media.isAllowedToForward()) {
	hasForwardLock = true;
	continue;
	}
	}

	PduPart part = new PduPart();

	if (media.isText()) {
	TextModel text = (TextModel) media;
	// Don't create empty text part.
	if (TextUtils.isEmpty(text.getText())) {
	continue;
	}
	// Set Charset if it's a text media.
	part.setCharset(text.getCharset());
	}

	// Set Content-Type.
	part.setContentType(media.getContentType().getBytes());

	String src = media.getSrc();
	String location;
	boolean startWithContentId = src.startsWith("cid:");
	if (startWithContentId) {
	location = src.substring("cid:".length());
	} else {
	location = src;
	}

	// Set Content-Location.
	part.setContentLocation(location.getBytes());

	// Set Content-Id.
	if (startWithContentId) {
	//Keep the original Content-Id.
	part.setContentId(location.getBytes());
	}
	else {
	int index = location.lastIndexOf(".");
	String contentId = (index == -1) ? location
	: location.substring(0, index);
	part.setContentId(contentId.getBytes());
	}

	if (media.isDrmProtected()) {
	DrmWrapper wrapper = media.getDrmObject();
	part.setDataUri(wrapper.getOriginalUri());
	part.setData(wrapper.getOriginalData());
	} else if (media.isText()) {
	part.setData(((TextModel) media).getText().getBytes());
	} else if (media.isImage() \|\| media.isVideo() \|\| media.isAudio()) {
	part.setDataUri(media.getUri());
	} else {
	Log.w(TAG, "Unsupport media: " + media);
	}

	pb.addPart(part);
	}
	}

	if (hasForwardLock && isMakingCopy && context != null) {
	Toast.makeText(context,
	context.getString(R.string.cannot_forward_drm_obj),
	Toast.LENGTH_LONG).show();
	document = SmilHelper.getDocument(pb);
	}

	// Create and insert SMIL part(as the first part) into the PduBody.
	ByteArrayOutputStream out = new ByteArrayOutputStream();
	SmilXmlSerializer.serialize(document, out);
	PduPart smilPart = new PduPart();
	smilPart.setContentId("smil".getBytes());
	smilPart.setContentLocation("smil.xml".getBytes());
	smilPart.setContentType(ContentType.APP_SMIL.getBytes());
	smilPart.setData(out.toByteArray());
	pb.addPart(0, smilPart);

	return pb;
	}

	public PduBody makeCopy(Context context) {
	return makePduBody(context, SmilHelper.getDocument(this), true);
	}

	public SMILDocument toSmilDocument() {
	if (mDocumentCache == null) {
	mDocumentCache = SmilHelper.getDocument(this);
	}
	return mDocumentCache;
	}

	public static PduBody getPduBody(Context context, Uri msg) throws MmsException {
	PduPersister p = PduPersister.getPduPersister(context);
	GenericPdu pdu = p.load(msg);

	int msgType = pdu.getMessageType();
	if ((msgType == PduHeaders.MESSAGE_TYPE_SEND_REQ)
	\|\| (msgType == PduHeaders.MESSAGE_TYPE_RETRIEVE_CONF)) {
	return ((MultimediaMessagePdu) pdu).getBody();
	} else {
	throw new MmsException();
	}
	}

	public void setCurrentMessageSize(int size) {
	mCurrentMessageSize = size;
	}

	// getCurrentMessageSize returns the size of the message, not including resizable attachments
	// such as photos. mCurrentMessageSize is used when adding/deleting/replacing non-resizable
	// attachments (movies, sounds, etc) in order to compute how much size is left in the message.
	// The difference between mCurrentMessageSize and the maxSize allowed for a message is then
	// divided up between the remaining resizable attachments. While this function is public,
	// it is only used internally between various MMS classes. If the UI wants to know the
	// size of a MMS message, it should call getTotalMessageSize() instead.
	public int getCurrentMessageSize() {
	return mCurrentMessageSize;
	}

	// getTotalMessageSize returns the total size of the message, including resizable attachments
	// such as photos. This function is intended to be used by the UI for displaying the size of the
	// MMS message.
	public int getTotalMessageSize() {
	return mTotalMessageSize;
	}

	public void increaseMessageSize(int increaseSize) {
	if (increaseSize > 0) {
	mCurrentMessageSize += increaseSize;
	}
	}

	public void decreaseMessageSize(int decreaseSize) {
	if (decreaseSize > 0) {
	mCurrentMessageSize -= decreaseSize;
	}
	}

	public LayoutModel getLayout() {
	return mLayout;
	}

	//
	// Implement List<E> interface.
	//
	public boolean add(SlideModel object) {
	int increaseSize = object.getSlideSize();
	checkMessageSize(increaseSize);

	if ((object != null) && mSlides.add(object)) {
	increaseMessageSize(increaseSize);
	object.registerModelChangedObserver(this);
	for (IModelChangedObserver observer : mModelChangedObservers) {
	object.registerModelChangedObserver(observer);
	}
	notifyModelChanged(true);
	return true;
	}
	return false;
	}

	public boolean addAll(Collection<? extends SlideModel> collection) {
	throw new UnsupportedOperationException("Operation not supported.");
	}

	public void clear() {
	if (mSlides.size() > 0) {
	for (SlideModel slide : mSlides) {
	slide.unregisterModelChangedObserver(this);
	for (IModelChangedObserver observer : mModelChangedObservers) {
	slide.unregisterModelChangedObserver(observer);
	}
	}
	mCurrentMessageSize = 0;
	mSlides.clear();
	notifyModelChanged(true);
	}
	}

	public boolean contains(Object object) {
	return mSlides.contains(object);
	}

	public boolean containsAll(Collection<?> collection) {
	return mSlides.containsAll(collection);
	}

	public boolean isEmpty() {
	return mSlides.isEmpty();
	}

	public Iterator<SlideModel> iterator() {
	return mSlides.iterator();
	}

	public boolean remove(Object object) {
	if ((object != null) && mSlides.remove(object)) {
	SlideModel slide = (SlideModel) object;
	decreaseMessageSize(slide.getSlideSize());
	slide.unregisterAllModelChangedObservers();
	notifyModelChanged(true);
	return true;
	}
	return false;
	}

	public boolean removeAll(Collection<?> collection) {
	throw new UnsupportedOperationException("Operation not supported.");
	}

	public boolean retainAll(Collection<?> collection) {
	throw new UnsupportedOperationException("Operation not supported.");
	}

	public int size() {
	return mSlides.size();
	}

	public Object[] toArray() {
	return mSlides.toArray();
	}

	public <T> T[] toArray(T[] array) {
	return mSlides.toArray(array);
	}

	public void add(int location, SlideModel object) {
	if (object != null) {
	int increaseSize = object.getSlideSize();
	checkMessageSize(increaseSize);

	mSlides.add(location, object);
	increaseMessageSize(increaseSize);
	object.registerModelChangedObserver(this);
	for (IModelChangedObserver observer : mModelChangedObservers) {
	object.registerModelChangedObserver(observer);
	}
	notifyModelChanged(true);
	}
	}

	public boolean addAll(int location,
	Collection<? extends SlideModel> collection) {
	throw new UnsupportedOperationException("Operation not supported.");
	}

	public SlideModel get(int location) {
	return (location >= 0 && location < mSlides.size()) ? mSlides.get(location) : null;
	}

	public int indexOf(Object object) {
	return mSlides.indexOf(object);
	}

	public int lastIndexOf(Object object) {
	return mSlides.lastIndexOf(object);
	}

	public ListIterator<SlideModel> listIterator() {
	return mSlides.listIterator();
	}

	public ListIterator<SlideModel> listIterator(int location) {
	return mSlides.listIterator(location);
	}

	public SlideModel remove(int location) {
	SlideModel slide = mSlides.remove(location);
	if (slide != null) {
	decreaseMessageSize(slide.getSlideSize());
	slide.unregisterAllModelChangedObservers();
	notifyModelChanged(true);
	}
	return slide;
	}

	public SlideModel set(int location, SlideModel object) {
	SlideModel slide = mSlides.get(location);
	if (null != object) {
	int removeSize = 0;
	int addSize = object.getSlideSize();
	if (null != slide) {
	removeSize = slide.getSlideSize();
	}
	if (addSize > removeSize) {
	checkMessageSize(addSize - removeSize);
	increaseMessageSize(addSize - removeSize);
	} else {
	decreaseMessageSize(removeSize - addSize);
	}
	}

	slide = mSlides.set(location, object);
	if (slide != null) {
	slide.unregisterAllModelChangedObservers();
	}

	if (object != null) {
	object.registerModelChangedObserver(this);
	for (IModelChangedObserver observer : mModelChangedObservers) {
	object.registerModelChangedObserver(observer);
	}
	}

	notifyModelChanged(true);
	return slide;
	}

	public List<SlideModel> subList(int start, int end) {
	return mSlides.subList(start, end);
	}

	@Override
	protected void registerModelChangedObserverInDescendants(
	IModelChangedObserver observer) {
	mLayout.registerModelChangedObserver(observer);

	for (SlideModel slide : mSlides) {
	slide.registerModelChangedObserver(observer);
	}
	}

	@Override
	protected void unregisterModelChangedObserverInDescendants(
	IModelChangedObserver observer) {
	mLayout.unregisterModelChangedObserver(observer);

	for (SlideModel slide : mSlides) {
	slide.unregisterModelChangedObserver(observer);
	}
	}

	@Override
	protected void unregisterAllModelChangedObserversInDescendants() {
	mLayout.unregisterAllModelChangedObservers();

	for (SlideModel slide : mSlides) {
	slide.unregisterAllModelChangedObservers();
	}
	}

	public void onModelChanged(Model model, boolean dataChanged) {
	if (dataChanged) {
	mDocumentCache = null;
	mPduBodyCache = null;
	}
	}

	public void sync(PduBody pb) {
	for (SlideModel slide : mSlides) {
	for (MediaModel media : slide) {
	PduPart part = pb.getPartByContentLocation(media.getSrc());
	if (part != null) {
	media.setUri(part.getDataUri());
	}
	}
	}
	}

	public void checkMessageSize(int increaseSize) throws ContentRestrictionException {
	ContentRestriction cr = ContentRestrictionFactory.getContentRestriction();
	cr.checkMessageSize(mCurrentMessageSize, increaseSize, mContext.getContentResolver());
	}

	/**
	* Determines whether this is a "simple" slideshow.
	* Criteria:
	* - Exactly one slide
	* - Exactly one multimedia attachment, but no audio
	* - It can optionally have a caption
	*/
	public boolean isSimple() {
	// There must be one (and only one) slide.
	if (size() != 1)
	return false;

	SlideModel slide = get(0);
	// The slide must have either an image or video, but not both.
	if (!(slide.hasImage() ^ slide.hasVideo()))
	return false;

	// No audio allowed.
	if (slide.hasAudio())
	return false;

	return true;
	}

	/**
	* Make sure the text in slide 0 is no longer holding onto a reference to the text
	* in the message text box.
	*/
	public void prepareForSend() {
	if (size() == 1) {
	TextModel text = get(0).getText();
	if (text != null) {
	text.cloneText();
	}
	}
	}

	/**
	* Resize all the resizeable media objects to fit in the remaining size of the slideshow.
	* This should be called off of the UI thread.
	*
	* @throws MmsException, ExceedMessageSizeException
	*/
	public void finalResize(Uri messageUri) throws MmsException, ExceedMessageSizeException {

	// Figure out if we have any media items that need to be resized and total up the
	// sizes of the items that can't be resized.
	int resizableCnt = 0;
	int fixedSizeTotal = 0;
	for (SlideModel slide : mSlides) {
	for (MediaModel media : slide) {
	if (media.getMediaResizable()) {
	++resizableCnt;
	} else {
	fixedSizeTotal += media.getMediaSize();
	}
	}
	}
	if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
	Log.v(TAG, "finalResize: original message size: " + getCurrentMessageSize() +
	" getMaxMessageSize: " + MmsConfig.getMaxMessageSize() +
	" fixedSizeTotal: " + fixedSizeTotal);
	}
	if (resizableCnt > 0) {
	int remainingSize = MmsConfig.getMaxMessageSize() - fixedSizeTotal - SLIDESHOW_SLOP;
	if (remainingSize <= 0) {
	throw new ExceedMessageSizeException("No room for pictures");
	}
	long messageId = ContentUris.parseId(messageUri);
	int bytesPerMediaItem = remainingSize / resizableCnt;
	// Resize the resizable media items to fit within their byte limit.
	for (SlideModel slide : mSlides) {
	for (MediaModel media : slide) {
	if (media.getMediaResizable()) {
	media.resizeMedia(bytesPerMediaItem, messageId);
	}
	}
	}
	// One last time through to calc the real message size.
	int totalSize = 0;
	for (SlideModel slide : mSlides) {
	for (MediaModel media : slide) {
	totalSize += media.getMediaSize();
	}
	}
	if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
	Log.v(TAG, "finalResize: new message size: " + totalSize);
	}

	if (totalSize > MmsConfig.getMaxMessageSize()) {
	throw new ExceedMessageSizeException("After compressing pictures, message too big");
	}
	setCurrentMessageSize(totalSize);

	onModelChanged(this, true); // clear the cached pdu body
	PduBody pb = toPduBody();
	// This will write out all the new parts to:
	// /data/data/com.android.providers.telephony/app_parts
	// and at the same time delete the old parts.
	PduPersister.getPduPersister(mContext).updateParts(messageUri, pb);
	}
	}

	}