1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.gallery3d.app; 18 19 import android.app.Activity; 20 import android.content.Intent; 21 import android.graphics.Bitmap; 22 import android.os.Bundle; 23 import android.os.Handler; 24 import android.os.Message; 25 import android.view.MotionEvent; 26 27 import com.android.gallery3d.R; 28 import com.android.gallery3d.common.Utils; 29 import com.android.gallery3d.data.ContentListener; 30 import com.android.gallery3d.data.MediaItem; 31 import com.android.gallery3d.data.MediaObject; 32 import com.android.gallery3d.data.MediaSet; 33 import com.android.gallery3d.data.Path; 34 import com.android.gallery3d.glrenderer.GLCanvas; 35 import com.android.gallery3d.ui.GLView; 36 import com.android.gallery3d.ui.SlideshowView; 37 import com.android.gallery3d.ui.SynchronizedHandler; 38 import com.android.gallery3d.util.Future; 39 import com.android.gallery3d.util.FutureListener; 40 41 import java.util.ArrayList; 42 import java.util.Random; 43 44 public class SlideshowPage extends ActivityState { 45 private static final String TAG = "SlideshowPage"; 46 47 public static final String KEY_SET_PATH = "media-set-path"; 48 public static final String KEY_ITEM_PATH = "media-item-path"; 49 public static final String KEY_PHOTO_INDEX = "photo-index"; 50 public static final String KEY_RANDOM_ORDER = "random-order"; 51 public static final String KEY_REPEAT = "repeat"; 52 public static final String KEY_DREAM = "dream"; 53 54 private static final long SLIDESHOW_DELAY = 3000; // 3 seconds 55 56 private static final int MSG_LOAD_NEXT_BITMAP = 1; 57 private static final int MSG_SHOW_PENDING_BITMAP = 2; 58 59 public static interface Model { 60 public void pause(); 61 62 public void resume(); 63 64 public Future<Slide> nextSlide(FutureListener<Slide> listener); 65 } 66 67 public static class Slide { 68 public Bitmap bitmap; 69 public MediaItem item; 70 public int index; 71 72 public Slide(MediaItem item, int index, Bitmap bitmap) { 73 this.bitmap = bitmap; 74 this.item = item; 75 this.index = index; 76 } 77 } 78 79 private Handler mHandler; 80 private Model mModel; 81 private SlideshowView mSlideshowView; 82 83 private Slide mPendingSlide = null; 84 private boolean mIsActive = false; 85 private final Intent mResultIntent = new Intent(); 86 87 @Override 88 protected int getBackgroundColorId() { 89 return R.color.slideshow_background; 90 } 91 92 private final GLView mRootPane = new GLView() { 93 @Override 94 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 95 mSlideshowView.layout(0, 0, right - left, bottom - top); 96 } 97 98 @Override 99 protected boolean onTouch(MotionEvent event) { 100 if (event.getAction() == MotionEvent.ACTION_UP) { 101 onBackPressed(); 102 } 103 return true; 104 } 105 106 @Override 107 protected void renderBackground(GLCanvas canvas) { 108 canvas.clearBuffer(getBackgroundColor()); 109 } 110 }; 111 112 @Override 113 public void onCreate(Bundle data, Bundle restoreState) { 114 super.onCreate(data, restoreState); 115 mFlags |= (FLAG_HIDE_ACTION_BAR | FLAG_HIDE_STATUS_BAR); 116 if (data.getBoolean(KEY_DREAM)) { 117 // Dream screensaver only keeps screen on for plugged devices. 118 mFlags |= FLAG_SCREEN_ON_WHEN_PLUGGED | FLAG_SHOW_WHEN_LOCKED; 119 } else { 120 // User-initiated slideshow would always keep screen on. 121 mFlags |= FLAG_SCREEN_ON_ALWAYS; 122 } 123 124 mHandler = new SynchronizedHandler(mActivity.getGLRoot()) { 125 @Override 126 public void handleMessage(Message message) { 127 switch (message.what) { 128 case MSG_SHOW_PENDING_BITMAP: 129 showPendingBitmap(); 130 break; 131 case MSG_LOAD_NEXT_BITMAP: 132 loadNextBitmap(); 133 break; 134 default: throw new AssertionError(); 135 } 136 } 137 }; 138 initializeViews(); 139 initializeData(data); 140 } 141 142 private void loadNextBitmap() { 143 mModel.nextSlide(new FutureListener<Slide>() { 144 @Override 145 public void onFutureDone(Future<Slide> future) { 146 mPendingSlide = future.get(); 147 mHandler.sendEmptyMessage(MSG_SHOW_PENDING_BITMAP); 148 } 149 }); 150 } 151 152 private void showPendingBitmap() { 153 // mPendingBitmap could be null, if 154 // 1.) there is no more items 155 // 2.) mModel is paused 156 Slide slide = mPendingSlide; 157 if (slide == null) { 158 if (mIsActive) { 159 mActivity.getStateManager().finishState(SlideshowPage.this); 160 } 161 return; 162 } 163 164 mSlideshowView.next(slide.bitmap, slide.item.getRotation()); 165 166 setStateResult(Activity.RESULT_OK, mResultIntent 167 .putExtra(KEY_ITEM_PATH, slide.item.getPath().toString()) 168 .putExtra(KEY_PHOTO_INDEX, slide.index)); 169 mHandler.sendEmptyMessageDelayed(MSG_LOAD_NEXT_BITMAP, SLIDESHOW_DELAY); 170 } 171 172 @Override 173 public void onPause() { 174 super.onPause(); 175 mIsActive = false; 176 mModel.pause(); 177 mSlideshowView.release(); 178 179 mHandler.removeMessages(MSG_LOAD_NEXT_BITMAP); 180 mHandler.removeMessages(MSG_SHOW_PENDING_BITMAP); 181 } 182 183 @Override 184 public void onResume() { 185 super.onResume(); 186 mIsActive = true; 187 mModel.resume(); 188 189 if (mPendingSlide != null) { 190 showPendingBitmap(); 191 } else { 192 loadNextBitmap(); 193 } 194 } 195 196 private void initializeData(Bundle data) { 197 boolean random = data.getBoolean(KEY_RANDOM_ORDER, false); 198 199 // We only want to show slideshow for images only, not videos. 200 String mediaPath = data.getString(KEY_SET_PATH); 201 mediaPath = FilterUtils.newFilterPath(mediaPath, FilterUtils.FILTER_IMAGE_ONLY); 202 MediaSet mediaSet = mActivity.getDataManager().getMediaSet(mediaPath); 203 204 if (random) { 205 boolean repeat = data.getBoolean(KEY_REPEAT); 206 mModel = new SlideshowDataAdapter(mActivity, 207 new ShuffleSource(mediaSet, repeat), 0, null); 208 setStateResult(Activity.RESULT_OK, mResultIntent.putExtra(KEY_PHOTO_INDEX, 0)); 209 } else { 210 int index = data.getInt(KEY_PHOTO_INDEX); 211 String itemPath = data.getString(KEY_ITEM_PATH); 212 Path path = itemPath != null ? Path.fromString(itemPath) : null; 213 boolean repeat = data.getBoolean(KEY_REPEAT); 214 mModel = new SlideshowDataAdapter(mActivity, new SequentialSource(mediaSet, repeat), 215 index, path); 216 setStateResult(Activity.RESULT_OK, mResultIntent.putExtra(KEY_PHOTO_INDEX, index)); 217 } 218 } 219 220 private void initializeViews() { 221 mSlideshowView = new SlideshowView(); 222 mRootPane.addComponent(mSlideshowView); 223 setContentPane(mRootPane); 224 } 225 226 private static MediaItem findMediaItem(MediaSet mediaSet, int index) { 227 for (int i = 0, n = mediaSet.getSubMediaSetCount(); i < n; ++i) { 228 MediaSet subset = mediaSet.getSubMediaSet(i); 229 int count = subset.getTotalMediaItemCount(); 230 if (index < count) { 231 return findMediaItem(subset, index); 232 } 233 index -= count; 234 } 235 ArrayList<MediaItem> list = mediaSet.getMediaItem(index, 1); 236 return list.isEmpty() ? null : list.get(0); 237 } 238 239 private static class ShuffleSource implements SlideshowDataAdapter.SlideshowSource { 240 private static final int RETRY_COUNT = 5; 241 private final MediaSet mMediaSet; 242 private final Random mRandom = new Random(); 243 private int mOrder[] = new int[0]; 244 private final boolean mRepeat; 245 private long mSourceVersion = MediaSet.INVALID_DATA_VERSION; 246 private int mLastIndex = -1; 247 248 public ShuffleSource(MediaSet mediaSet, boolean repeat) { 249 mMediaSet = Utils.checkNotNull(mediaSet); 250 mRepeat = repeat; 251 } 252 253 @Override 254 public int findItemIndex(Path path, int hint) { 255 return hint; 256 } 257 258 @Override 259 public MediaItem getMediaItem(int index) { 260 if (!mRepeat && index >= mOrder.length) return null; 261 if (mOrder.length == 0) return null; 262 mLastIndex = mOrder[index % mOrder.length]; 263 MediaItem item = findMediaItem(mMediaSet, mLastIndex); 264 for (int i = 0; i < RETRY_COUNT && item == null; ++i) { 265 Log.w(TAG, "fail to find image: " + mLastIndex); 266 mLastIndex = mRandom.nextInt(mOrder.length); 267 item = findMediaItem(mMediaSet, mLastIndex); 268 } 269 return item; 270 } 271 272 @Override 273 public long reload() { 274 long version = mMediaSet.reload(); 275 if (version != mSourceVersion) { 276 mSourceVersion = version; 277 int count = mMediaSet.getTotalMediaItemCount(); 278 if (count != mOrder.length) generateOrderArray(count); 279 } 280 return version; 281 } 282 283 private void generateOrderArray(int totalCount) { 284 if (mOrder.length != totalCount) { 285 mOrder = new int[totalCount]; 286 for (int i = 0; i < totalCount; ++i) { 287 mOrder[i] = i; 288 } 289 } 290 for (int i = totalCount - 1; i > 0; --i) { 291 Utils.swap(mOrder, i, mRandom.nextInt(i + 1)); 292 } 293 if (mOrder[0] == mLastIndex && totalCount > 1) { 294 Utils.swap(mOrder, 0, mRandom.nextInt(totalCount - 1) + 1); 295 } 296 } 297 298 @Override 299 public void addContentListener(ContentListener listener) { 300 mMediaSet.addContentListener(listener); 301 } 302 303 @Override 304 public void removeContentListener(ContentListener listener) { 305 mMediaSet.removeContentListener(listener); 306 } 307 } 308 309 private static class SequentialSource implements SlideshowDataAdapter.SlideshowSource { 310 private static final int DATA_SIZE = 32; 311 312 private ArrayList<MediaItem> mData = new ArrayList<MediaItem>(); 313 private int mDataStart = 0; 314 private long mDataVersion = MediaObject.INVALID_DATA_VERSION; 315 private final MediaSet mMediaSet; 316 private final boolean mRepeat; 317 318 public SequentialSource(MediaSet mediaSet, boolean repeat) { 319 mMediaSet = mediaSet; 320 mRepeat = repeat; 321 } 322 323 @Override 324 public int findItemIndex(Path path, int hint) { 325 return mMediaSet.getIndexOfItem(path, hint); 326 } 327 328 @Override 329 public MediaItem getMediaItem(int index) { 330 int dataEnd = mDataStart + mData.size(); 331 332 if (mRepeat) { 333 int count = mMediaSet.getMediaItemCount(); 334 if (count == 0) return null; 335 index = index % count; 336 } 337 if (index < mDataStart || index >= dataEnd) { 338 mData = mMediaSet.getMediaItem(index, DATA_SIZE); 339 mDataStart = index; 340 dataEnd = index + mData.size(); 341 } 342 343 return (index < mDataStart || index >= dataEnd) ? null : mData.get(index - mDataStart); 344 } 345 346 @Override 347 public long reload() { 348 long version = mMediaSet.reload(); 349 if (version != mDataVersion) { 350 mDataVersion = version; 351 mData.clear(); 352 } 353 return mDataVersion; 354 } 355 356 @Override 357 public void addContentListener(ContentListener listener) { 358 mMediaSet.addContentListener(listener); 359 } 360 361 @Override 362 public void removeContentListener(ContentListener listener) { 363 mMediaSet.removeContentListener(listener); 364 } 365 } 366 } 367
