| /* |
| * Copyright (C) 2010 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.gallery3d.ui; |
| |
| import com.android.gallery3d.R; |
| import com.android.gallery3d.app.GalleryActivity; |
| import com.android.gallery3d.common.Utils; |
| import com.android.gallery3d.data.MediaItem; |
| import com.android.gallery3d.data.MediaSet; |
| import com.android.gallery3d.data.Path; |
| import com.android.gallery3d.ui.AlbumSetView.AlbumSetItem; |
| import com.android.gallery3d.util.Future; |
| import com.android.gallery3d.util.FutureListener; |
| import com.android.gallery3d.util.MediaSetUtils; |
| import com.android.gallery3d.util.ThreadPool; |
| |
| import android.graphics.Bitmap; |
| import android.graphics.Color; |
| import android.os.Message; |
| |
| public class AlbumSetSlidingWindow implements AlbumSetView.ModelListener { |
| private static final String TAG = "GallerySlidingWindow"; |
| private static final int MSG_LOAD_BITMAP_DONE = 0; |
| |
| public static interface Listener { |
| public void onSizeChanged(int size); |
| public void onContentInvalidated(); |
| public void onWindowContentChanged( |
| int slot, AlbumSetItem old, AlbumSetItem update); |
| } |
| |
| private final AlbumSetView.Model mSource; |
| private int mSize; |
| private int mLabelWidth; |
| private int mDisplayItemSize; |
| private int mLabelFontSize; |
| |
| private int mContentStart = 0; |
| private int mContentEnd = 0; |
| |
| private int mActiveStart = 0; |
| private int mActiveEnd = 0; |
| |
| private Listener mListener; |
| |
| private final MyAlbumSetItem mData[]; |
| private SelectionDrawer mSelectionDrawer; |
| private final ColorTexture mWaitLoadingTexture; |
| |
| private SynchronizedHandler mHandler; |
| private ThreadPool mThreadPool; |
| |
| private int mActiveRequestCount = 0; |
| private String mLoadingLabel; |
| private boolean mIsActive = false; |
| |
| private static class MyAlbumSetItem extends AlbumSetItem { |
| public Path setPath; |
| public int sourceType; |
| public int cacheFlag; |
| public int cacheStatus; |
| } |
| |
| public AlbumSetSlidingWindow(GalleryActivity activity, int labelWidth, |
| int displayItemSize, int labelFontSize, SelectionDrawer drawer, |
| AlbumSetView.Model source, int cacheSize) { |
| source.setModelListener(this); |
| mLabelWidth = labelWidth; |
| mDisplayItemSize = displayItemSize; |
| mLabelFontSize = labelFontSize; |
| mLoadingLabel = activity.getAndroidContext().getString(R.string.loading); |
| mSource = source; |
| mSelectionDrawer = drawer; |
| mData = new MyAlbumSetItem[cacheSize]; |
| mSize = source.size(); |
| |
| mWaitLoadingTexture = new ColorTexture(Color.TRANSPARENT); |
| mWaitLoadingTexture.setSize(1, 1); |
| |
| mHandler = new SynchronizedHandler(activity.getGLRoot()) { |
| @Override |
| public void handleMessage(Message message) { |
| Utils.assertTrue(message.what == MSG_LOAD_BITMAP_DONE); |
| ((GalleryDisplayItem) message.obj).onLoadBitmapDone(); |
| } |
| }; |
| |
| mThreadPool = activity.getThreadPool(); |
| } |
| |
| public void setSelectionDrawer(SelectionDrawer drawer) { |
| mSelectionDrawer = drawer; |
| } |
| |
| public void setListener(Listener listener) { |
| mListener = listener; |
| } |
| |
| public AlbumSetItem get(int slotIndex) { |
| Utils.assertTrue(isActiveSlot(slotIndex), |
| "invalid slot: %s outsides (%s, %s)", |
| slotIndex, mActiveStart, mActiveEnd); |
| return mData[slotIndex % mData.length]; |
| } |
| |
| public int size() { |
| return mSize; |
| } |
| |
| public boolean isActiveSlot(int slotIndex) { |
| return slotIndex >= mActiveStart && slotIndex < mActiveEnd; |
| } |
| |
| private void setContentWindow(int contentStart, int contentEnd) { |
| if (contentStart == mContentStart && contentEnd == mContentEnd) return; |
| |
| if (contentStart >= mContentEnd || mContentStart >= contentEnd) { |
| for (int i = mContentStart, n = mContentEnd; i < n; ++i) { |
| freeSlotContent(i); |
| } |
| mSource.setActiveWindow(contentStart, contentEnd); |
| for (int i = contentStart; i < contentEnd; ++i) { |
| prepareSlotContent(i); |
| } |
| } else { |
| for (int i = mContentStart; i < contentStart; ++i) { |
| freeSlotContent(i); |
| } |
| for (int i = contentEnd, n = mContentEnd; i < n; ++i) { |
| freeSlotContent(i); |
| } |
| mSource.setActiveWindow(contentStart, contentEnd); |
| for (int i = contentStart, n = mContentStart; i < n; ++i) { |
| prepareSlotContent(i); |
| } |
| for (int i = mContentEnd; i < contentEnd; ++i) { |
| prepareSlotContent(i); |
| } |
| } |
| |
| mContentStart = contentStart; |
| mContentEnd = contentEnd; |
| } |
| |
| public void setActiveWindow(int start, int end) { |
| Utils.assertTrue( |
| start <= end && end - start <= mData.length && end <= mSize, |
| "start = %s, end = %s, length = %s, size = %s", |
| start, end, mData.length, mSize); |
| |
| AlbumSetItem data[] = mData; |
| |
| mActiveStart = start; |
| mActiveEnd = end; |
| |
| // If no data is visible, keep the cache content |
| if (start == end) return; |
| |
| int contentStart = Utils.clamp((start + end) / 2 - data.length / 2, |
| 0, Math.max(0, mSize - data.length)); |
| int contentEnd = Math.min(contentStart + data.length, mSize); |
| setContentWindow(contentStart, contentEnd); |
| if (mIsActive) updateAllImageRequests(); |
| } |
| |
| // We would like to request non active slots in the following order: |
| // Order: 8 6 4 2 1 3 5 7 |
| // |---------|---------------|---------| |
| // |<- active ->| |
| // |<-------- cached range ----------->| |
| private void requestNonactiveImages() { |
| int range = Math.max( |
| mContentEnd - mActiveEnd, mActiveStart - mContentStart); |
| for (int i = 0 ;i < range; ++i) { |
| requestImagesInSlot(mActiveEnd + i); |
| requestImagesInSlot(mActiveStart - 1 - i); |
| } |
| } |
| |
| private void cancelNonactiveImages() { |
| int range = Math.max( |
| mContentEnd - mActiveEnd, mActiveStart - mContentStart); |
| for (int i = 0 ;i < range; ++i) { |
| cancelImagesInSlot(mActiveEnd + i); |
| cancelImagesInSlot(mActiveStart - 1 - i); |
| } |
| } |
| |
| private void requestImagesInSlot(int slotIndex) { |
| if (slotIndex < mContentStart || slotIndex >= mContentEnd) return; |
| AlbumSetItem items = mData[slotIndex % mData.length]; |
| for (DisplayItem item : items.covers) { |
| ((GalleryDisplayItem) item).requestImage(); |
| } |
| } |
| |
| private void cancelImagesInSlot(int slotIndex) { |
| if (slotIndex < mContentStart || slotIndex >= mContentEnd) return; |
| AlbumSetItem items = mData[slotIndex % mData.length]; |
| for (DisplayItem item : items.covers) { |
| ((GalleryDisplayItem) item).cancelImageRequest(); |
| } |
| } |
| |
| private void freeSlotContent(int slotIndex) { |
| AlbumSetItem data[] = mData; |
| int index = slotIndex % data.length; |
| AlbumSetItem original = data[index]; |
| if (original != null) { |
| data[index] = null; |
| for (DisplayItem item : original.covers) { |
| ((GalleryDisplayItem) item).recycle(); |
| } |
| } |
| } |
| |
| private long getMediaSetDataVersion(MediaSet set) { |
| return set == null |
| ? MediaSet.INVALID_DATA_VERSION |
| : set.getDataVersion(); |
| } |
| |
| private void prepareSlotContent(int slotIndex) { |
| MediaSet set = mSource.getMediaSet(slotIndex); |
| |
| MyAlbumSetItem item = new MyAlbumSetItem(); |
| MediaItem[] coverItems = mSource.getCoverItems(slotIndex); |
| item.covers = new GalleryDisplayItem[coverItems.length]; |
| item.sourceType = identifySourceType(set); |
| item.cacheFlag = identifyCacheFlag(set); |
| item.cacheStatus = identifyCacheStatus(set); |
| item.setPath = set == null ? null : set.getPath(); |
| |
| for (int i = 0; i < coverItems.length; ++i) { |
| item.covers[i] = new GalleryDisplayItem(slotIndex, i, coverItems[i]); |
| } |
| item.labelItem = new LabelDisplayItem(slotIndex); |
| item.setDataVersion = getMediaSetDataVersion(set); |
| mData[slotIndex % mData.length] = item; |
| } |
| |
| private boolean isCoverItemsChanged(int slotIndex) { |
| AlbumSetItem original = mData[slotIndex % mData.length]; |
| if (original == null) return true; |
| MediaItem[] coverItems = mSource.getCoverItems(slotIndex); |
| |
| if (original.covers.length != coverItems.length) return true; |
| for (int i = 0, n = coverItems.length; i < n; ++i) { |
| GalleryDisplayItem g = (GalleryDisplayItem) original.covers[i]; |
| if (g.mDataVersion != coverItems[i].getDataVersion()) return true; |
| } |
| return false; |
| } |
| |
| private void updateSlotContent(final int slotIndex) { |
| |
| MyAlbumSetItem data[] = mData; |
| int pos = slotIndex % data.length; |
| MyAlbumSetItem original = data[pos]; |
| |
| if (!isCoverItemsChanged(slotIndex)) { |
| MediaSet set = mSource.getMediaSet(slotIndex); |
| original.sourceType = identifySourceType(set); |
| original.cacheFlag = identifyCacheFlag(set); |
| original.cacheStatus = identifyCacheStatus(set); |
| original.setPath = set == null ? null : set.getPath(); |
| ((LabelDisplayItem) original.labelItem).updateContent(); |
| if (mListener != null) mListener.onContentInvalidated(); |
| return; |
| } |
| |
| prepareSlotContent(slotIndex); |
| AlbumSetItem update = data[pos]; |
| |
| if (mListener != null && isActiveSlot(slotIndex)) { |
| mListener.onWindowContentChanged(slotIndex, original, update); |
| } |
| if (original != null) { |
| for (DisplayItem item : original.covers) { |
| ((GalleryDisplayItem) item).recycle(); |
| } |
| } |
| } |
| |
| private void notifySlotChanged(int slotIndex) { |
| // If the updated content is not cached, ignore it |
| if (slotIndex < mContentStart || slotIndex >= mContentEnd) { |
| Log.w(TAG, String.format( |
| "invalid update: %s is outside (%s, %s)", |
| slotIndex, mContentStart, mContentEnd) ); |
| return; |
| } |
| updateSlotContent(slotIndex); |
| boolean isActiveSlot = isActiveSlot(slotIndex); |
| if (mActiveRequestCount == 0 || isActiveSlot) { |
| for (DisplayItem item : mData[slotIndex % mData.length].covers) { |
| GalleryDisplayItem galleryItem = (GalleryDisplayItem) item; |
| galleryItem.requestImage(); |
| if (isActiveSlot && galleryItem.isRequestInProgress()) { |
| ++mActiveRequestCount; |
| } |
| } |
| } |
| } |
| |
| private void updateAllImageRequests() { |
| mActiveRequestCount = 0; |
| for (int i = mActiveStart, n = mActiveEnd; i < n; ++i) { |
| for (DisplayItem item : mData[i % mData.length].covers) { |
| GalleryDisplayItem coverItem = (GalleryDisplayItem) item; |
| coverItem.requestImage(); |
| if (coverItem.isRequestInProgress()) ++mActiveRequestCount; |
| } |
| } |
| if (mActiveRequestCount == 0) { |
| requestNonactiveImages(); |
| } else { |
| cancelNonactiveImages(); |
| } |
| } |
| |
| private class GalleryDisplayItem extends AbstractDisplayItem |
| implements FutureListener<Bitmap> { |
| private Future<Bitmap> mFuture; |
| private final int mSlotIndex; |
| private final int mCoverIndex; |
| private final int mMediaType; |
| private Texture mContent; |
| private final long mDataVersion; |
| |
| public GalleryDisplayItem(int slotIndex, int coverIndex, MediaItem item) { |
| super(item); |
| mSlotIndex = slotIndex; |
| mCoverIndex = coverIndex; |
| mMediaType = item.getMediaType(); |
| mDataVersion = item.getDataVersion(); |
| updateContent(mWaitLoadingTexture); |
| } |
| |
| @Override |
| protected void onBitmapAvailable(Bitmap bitmap) { |
| if (isActiveSlot(mSlotIndex)) { |
| --mActiveRequestCount; |
| if (mActiveRequestCount == 0) requestNonactiveImages(); |
| } |
| if (bitmap != null) { |
| BitmapTexture texture = new BitmapTexture(bitmap); |
| texture.setThrottled(true); |
| updateContent(texture); |
| if (mListener != null) mListener.onContentInvalidated(); |
| } |
| } |
| |
| private void updateContent(Texture content) { |
| mContent = content; |
| |
| int width = content.getWidth(); |
| int height = content.getHeight(); |
| |
| float scale = (float) mDisplayItemSize / Math.max(width, height); |
| |
| width = (int) Math.floor(width * scale); |
| height = (int) Math.floor(height * scale); |
| |
| setSize(width, height); |
| } |
| |
| @Override |
| public boolean render(GLCanvas canvas, int pass) { |
| int sourceType = SelectionDrawer.DATASOURCE_TYPE_NOT_CATEGORIZED; |
| int cacheFlag = MediaSet.CACHE_FLAG_NO; |
| int cacheStatus = MediaSet.CACHE_STATUS_NOT_CACHED; |
| MyAlbumSetItem set = mData[mSlotIndex % mData.length]; |
| Path path = set.setPath; |
| if (mCoverIndex == 0) { |
| sourceType = set.sourceType; |
| cacheFlag = set.cacheFlag; |
| cacheStatus = set.cacheStatus; |
| } |
| |
| mSelectionDrawer.draw(canvas, mContent, mWidth, mHeight, |
| getRotation(), path, mCoverIndex, sourceType, mMediaType, |
| cacheFlag == MediaSet.CACHE_FLAG_FULL, |
| (cacheFlag == MediaSet.CACHE_FLAG_FULL) |
| && (cacheStatus != MediaSet.CACHE_STATUS_CACHED_FULL)); |
| return false; |
| } |
| |
| @Override |
| public void startLoadBitmap() { |
| mFuture = mThreadPool.submit(mMediaItem.requestImage( |
| MediaItem.TYPE_MICROTHUMBNAIL), this); |
| } |
| |
| @Override |
| public void cancelLoadBitmap() { |
| mFuture.cancel(); |
| } |
| |
| @Override |
| public void onFutureDone(Future<Bitmap> future) { |
| mHandler.sendMessage(mHandler.obtainMessage(MSG_LOAD_BITMAP_DONE, this)); |
| } |
| |
| private void onLoadBitmapDone() { |
| Future<Bitmap> future = mFuture; |
| mFuture = null; |
| updateImage(future.get(), future.isCancelled()); |
| } |
| |
| @Override |
| public String toString() { |
| return String.format("GalleryDisplayItem(%s, %s)", mSlotIndex, mCoverIndex); |
| } |
| } |
| |
| private static int identifySourceType(MediaSet set) { |
| if (set == null) { |
| return SelectionDrawer.DATASOURCE_TYPE_NOT_CATEGORIZED; |
| } |
| |
| Path path = set.getPath(); |
| if (MediaSetUtils.isCameraSource(path)) { |
| return SelectionDrawer.DATASOURCE_TYPE_CAMERA; |
| } |
| |
| int type = SelectionDrawer.DATASOURCE_TYPE_NOT_CATEGORIZED; |
| String prefix = path.getPrefix(); |
| |
| if (prefix.equals("picasa")) { |
| type = SelectionDrawer.DATASOURCE_TYPE_PICASA; |
| } else if (prefix.equals("local") || prefix.equals("merge")) { |
| type = SelectionDrawer.DATASOURCE_TYPE_LOCAL; |
| } else if (prefix.equals("mtp")) { |
| type = SelectionDrawer.DATASOURCE_TYPE_MTP; |
| } |
| |
| return type; |
| } |
| |
| private static int identifyCacheFlag(MediaSet set) { |
| if (set == null || (set.getSupportedOperations() |
| & MediaSet.SUPPORT_CACHE) == 0) { |
| return MediaSet.CACHE_FLAG_NO; |
| } |
| |
| return set.getCacheFlag(); |
| } |
| |
| private static int identifyCacheStatus(MediaSet set) { |
| if (set == null || (set.getSupportedOperations() |
| & MediaSet.SUPPORT_CACHE) == 0) { |
| return MediaSet.CACHE_STATUS_NOT_CACHED; |
| } |
| |
| return set.getCacheStatus(); |
| } |
| |
| private class LabelDisplayItem extends DisplayItem { |
| private static final int FONT_COLOR = Color.WHITE; |
| |
| private StringTexture mTexture; |
| private String mLabel; |
| private String mPostfix; |
| private final int mSlotIndex; |
| |
| public LabelDisplayItem(int slotIndex) { |
| mSlotIndex = slotIndex; |
| updateContent(); |
| } |
| |
| public boolean updateContent() { |
| String label = mLoadingLabel; |
| String postfix = null; |
| MediaSet set = mSource.getMediaSet(mSlotIndex); |
| if (set != null) { |
| label = Utils.ensureNotNull(set.getName()); |
| postfix = " (" + set.getTotalMediaItemCount() + ")"; |
| } |
| if (Utils.equals(label, mLabel) |
| && Utils.equals(postfix, mPostfix)) return false; |
| mTexture = StringTexture.newInstance( |
| label, postfix, mLabelFontSize, FONT_COLOR, mLabelWidth, true); |
| setSize(mTexture.getWidth(), mTexture.getHeight()); |
| return true; |
| } |
| |
| @Override |
| public boolean render(GLCanvas canvas, int pass) { |
| mTexture.draw(canvas, -mWidth / 2, -mHeight / 2); |
| return false; |
| } |
| |
| @Override |
| public long getIdentity() { |
| return System.identityHashCode(this); |
| } |
| } |
| |
| public void onSizeChanged(int size) { |
| if (mSize != size) { |
| mSize = size; |
| if (mListener != null && mIsActive) mListener.onSizeChanged(mSize); |
| } |
| } |
| |
| public void onWindowContentChanged(int index) { |
| if (!mIsActive) { |
| // paused, ignore slot changed event |
| return; |
| } |
| notifySlotChanged(index); |
| } |
| |
| public void pause() { |
| mIsActive = false; |
| for (int i = mContentStart, n = mContentEnd; i < n; ++i) { |
| freeSlotContent(i); |
| } |
| } |
| |
| public void resume() { |
| mIsActive = true; |
| for (int i = mContentStart, n = mContentEnd; i < n; ++i) { |
| prepareSlotContent(i); |
| } |
| updateAllImageRequests(); |
| } |
| } |