| /******************************************************************************* |
| * Copyright (C) 2012 Google Inc. |
| * Licensed to 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.mail.browse; |
| |
| import android.app.Activity; |
| import android.content.ContentProvider; |
| import android.content.ContentProviderOperation; |
| import android.content.ContentResolver; |
| import android.content.ContentValues; |
| import android.content.Context; |
| import android.content.OperationApplicationException; |
| import android.database.CharArrayBuffer; |
| import android.database.ContentObserver; |
| import android.database.Cursor; |
| import android.database.CursorWrapper; |
| import android.database.DataSetObservable; |
| import android.database.DataSetObserver; |
| import android.net.Uri; |
| import android.os.AsyncTask; |
| import android.os.Bundle; |
| import android.os.Looper; |
| import android.os.RemoteException; |
| |
| import com.android.mail.providers.Conversation; |
| import com.android.mail.providers.UIProvider; |
| import com.android.mail.providers.UIProvider.ConversationColumns; |
| import com.android.mail.providers.UIProvider.ConversationListQueryParameters; |
| import com.android.mail.providers.UIProvider.ConversationOperations; |
| import com.android.mail.utils.LogUtils; |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.collect.Lists; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| /** |
| * ConversationCursor is a wrapper around a conversation list cursor that provides update/delete |
| * caching for quick UI response. This is effectively a singleton class, as the cache is |
| * implemented as a static HashMap. |
| */ |
| public final class ConversationCursor implements Cursor { |
| private static final String TAG = "ConversationCursor"; |
| |
| private static final boolean DEBUG = true; // STOPSHIP Set to false before shipping |
| // A deleted row is indicated by the presence of DELETED_COLUMN in the cache map |
| private static final String DELETED_COLUMN = "__deleted__"; |
| // An row cached during a requery is indicated by the presence of REQUERY_COLUMN in the map |
| private static final String REQUERY_COLUMN = "__requery__"; |
| // A sentinel value for the "index" of the deleted column; it's an int that is otherwise invalid |
| private static final int DELETED_COLUMN_INDEX = -1; |
| // Empty deletion list |
| private static final Collection<Conversation> EMPTY_DELETION_LIST = Lists.newArrayList(); |
| // The index of the Uri whose data is reflected in the cached row |
| // Updates/Deletes to this Uri are cached |
| private static int sUriColumnIndex; |
| // Our sequence count (for changes sent to underlying provider) |
| private static int sSequence = 0; |
| // The resolver for the cursor instantiator's context |
| private static ContentResolver sResolver; |
| @VisibleForTesting |
| static ConversationProvider sProvider; |
| |
| // The cursor instantiator's activity |
| private Activity mActivity; |
| // The cursor underlying the caching cursor |
| @VisibleForTesting |
| Wrapper mUnderlyingCursor; |
| // The new cursor obtained via a requery |
| private volatile Wrapper mRequeryCursor; |
| // A mapping from Uri to updated ContentValues |
| private HashMap<String, ContentValues> mCacheMap = new HashMap<String, ContentValues>(); |
| // Cache map lock (will be used only very briefly - few ms at most) |
| private Object mCacheMapLock = new Object(); |
| // The listeners registered for this cursor |
| private List<ConversationListener> mListeners = Lists.newArrayList(); |
| // The ConversationProvider instance |
| // The runnable executing a refresh (query of underlying provider) |
| private RefreshTask mRefreshTask; |
| // Set when we've sent refreshReady() to listeners |
| private boolean mRefreshReady = false; |
| // Set when we've sent refreshRequired() to listeners |
| private boolean mRefreshRequired = false; |
| // Whether our first query on this cursor should include a limit |
| private boolean mInitialConversationLimit = false; |
| // A list of mostly-dead items |
| private List<Conversation> sMostlyDead = Lists.newArrayList(); |
| // The name of the loader |
| private final String mName; |
| // Column names for this cursor |
| private String[] mColumnNames; |
| // An observer on the underlying cursor (so we can detect changes from outside the UI) |
| private final CursorObserver mCursorObserver; |
| // Whether our observer is currently registered with the underlying cursor |
| private boolean mCursorObserverRegistered = false; |
| // Whether our loader is paused |
| private boolean mPaused = false; |
| // Whether or not sync from underlying provider should be deferred |
| private boolean mDeferSync = false; |
| |
| // The current position of the cursor |
| private int mPosition = -1; |
| |
| /** |
| * Allow UI elements to subscribe to changes that other UI elements might make to this data. |
| * This short circuits the usual DB round-trip needed for data to propagate across disparate |
| * UI elements. |
| * <p> |
| * A UI element that receives a notification on this channel should just update its existing |
| * view, and should not trigger a full refresh. |
| */ |
| private final DataSetObservable mDataSetObservable = new DataSetObservable(); |
| |
| // The number of cached deletions from this cursor (used to quickly generate an accurate count) |
| private int mDeletedCount = 0; |
| |
| // Parameters passed to the underlying query |
| private Uri qUri; |
| private String[] qProjection; |
| |
| private void setCursor(Wrapper cursor) { |
| // If we have an existing underlying cursor, make sure it's closed |
| if (mUnderlyingCursor != null) { |
| mUnderlyingCursor.close(); |
| } |
| mColumnNames = cursor.getColumnNames(); |
| mRefreshRequired = false; |
| mRefreshReady = false; |
| mRefreshTask = null; |
| resetCursor(cursor); |
| } |
| |
| public ConversationCursor(Activity activity, Uri uri, boolean initialConversationLimit, |
| String name) { |
| //sActivity = activity; |
| mInitialConversationLimit = initialConversationLimit; |
| sResolver = activity.getContentResolver(); |
| sUriColumnIndex = UIProvider.CONVERSATION_URI_COLUMN; |
| qUri = uri; |
| mName = name; |
| qProjection = UIProvider.CONVERSATION_PROJECTION; |
| mCursorObserver = new CursorObserver(); |
| } |
| |
| /** |
| * Create a ConversationCursor; this should be called by the ListActivity using that cursor |
| * @param activity the activity creating the cursor |
| * @param messageListColumn the column used for individual cursor items |
| * @param uri the query uri |
| * @param projection the query projecion |
| * @param selection the query selection |
| * @param selectionArgs the query selection args |
| * @param sortOrder the query sort order |
| * @return a ConversationCursor |
| */ |
| public void load() { |
| synchronized (mCacheMapLock) { |
| try { |
| // Create new ConversationCursor |
| LogUtils.i(TAG, "Create: initial creation"); |
| Wrapper c = doQuery(mInitialConversationLimit); |
| setCursor(c); |
| } finally { |
| // If we used a limit, queue up a query without limit |
| if (mInitialConversationLimit) { |
| mInitialConversationLimit = false; |
| refresh(); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Pause notifications to UI |
| */ |
| public void pause() { |
| if (DEBUG) { |
| LogUtils.i(TAG, "[Paused: " + mName + "]"); |
| } |
| mPaused = true; |
| } |
| |
| /** |
| * Resume notifications to UI; if any are pending, send them |
| */ |
| public void resume() { |
| if (DEBUG) { |
| LogUtils.i(TAG, "[Resumed: " + mName + "]"); |
| } |
| mPaused = false; |
| checkNotifyUI(); |
| } |
| |
| private void checkNotifyUI() { |
| if (!mPaused && !mDeferSync) { |
| if (mRefreshRequired && (mRefreshTask == null)) { |
| notifyRefreshRequired(); |
| } else if (mRefreshReady) { |
| notifyRefreshReady(); |
| } |
| } else { |
| LogUtils.i(TAG, "[checkNotifyUI: " + (mPaused ? "Paused " : "") + |
| (mDeferSync ? "Defer" : "")); |
| } |
| } |
| |
| /** |
| * Runnable that performs the query on the underlying provider |
| */ |
| private class RefreshTask extends AsyncTask<Void, Void, Void> { |
| private Wrapper mCursor = null; |
| |
| private RefreshTask() { |
| } |
| |
| @Override |
| protected Void doInBackground(Void... params) { |
| if (DEBUG) { |
| LogUtils.i(TAG, "[Start refresh of " + mName + ": %d]", hashCode()); |
| } |
| // Get new data |
| mCursor = doQuery(false); |
| return null; |
| } |
| |
| @Override |
| protected void onPostExecute(Void param) { |
| synchronized(mCacheMapLock) { |
| mRequeryCursor = mCursor; |
| // Make sure window is full |
| mRequeryCursor.getCount(); |
| mRefreshReady = true; |
| if (DEBUG) { |
| LogUtils.i(TAG, "[Query done " + mName + ": %d]", hashCode()); |
| } |
| if (!mDeferSync && !mPaused) { |
| notifyRefreshReady(); |
| } |
| } |
| } |
| |
| @Override |
| protected void onCancelled() { |
| if (DEBUG) { |
| LogUtils.i(TAG, "[Ignoring refresh result: %d]", hashCode()); |
| } |
| if (mCursor != null) { |
| mCursor.close(); |
| } |
| } |
| } |
| |
| /** |
| * Wrapper that includes the Uri used to create the cursor |
| */ |
| private static class Wrapper extends CursorWrapper { |
| private final Uri mUri; |
| |
| Wrapper(Cursor cursor, Uri uri) { |
| super(cursor); |
| mUri = uri; |
| } |
| } |
| |
| private Wrapper doQuery(boolean withLimit) { |
| if (sResolver == null) { |
| sResolver = mActivity.getContentResolver(); |
| } |
| Uri uri = qUri; |
| if (withLimit) { |
| uri = uri.buildUpon().appendQueryParameter(ConversationListQueryParameters.LIMIT, |
| ConversationListQueryParameters.DEFAULT_LIMIT).build(); |
| } |
| long time = System.currentTimeMillis(); |
| |
| Wrapper result = new Wrapper(sResolver.query(uri, qProjection, null, null, null), uri); |
| if (DEBUG) { |
| time = System.currentTimeMillis() - time; |
| LogUtils.i(TAG, "ConversationCursor query: %s, %dms, %d results", |
| uri, time, result.getCount()); |
| } |
| return result; |
| } |
| |
| /** |
| * Return whether the uri string (message list uri) is in the underlying cursor |
| * @param uriString the uri string we're looking for |
| * @return true if the uri string is in the cursor; false otherwise |
| */ |
| private boolean isInUnderlyingCursor(String uriString) { |
| mUnderlyingCursor.moveToPosition(-1); |
| while (mUnderlyingCursor.moveToNext()) { |
| if (uriString.equals(mUnderlyingCursor.getString(sUriColumnIndex))) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| static boolean offUiThread() { |
| return Looper.getMainLooper().getThread() != Thread.currentThread(); |
| } |
| |
| /** |
| * Reset the cursor; this involves clearing out our cache map and resetting our various counts |
| * The cursor should be reset whenever we get fresh data from the underlying cursor. The cache |
| * is locked during the reset, which will block the UI, but for only a very short time |
| * (estimated at a few ms, but we can profile this; remember that the cache will usually |
| * be empty or have a few entries) |
| */ |
| private void resetCursor(Wrapper newCursor) { |
| synchronized (mCacheMapLock) { |
| // Walk through the cache. Here are the cases: |
| // 1) The entry isn't marked with REQUERY - remove it from the cache. If DELETED is |
| // set, decrement the deleted count |
| // 2) The REQUERY entry is still in the UP |
| // 2a) The REQUERY entry isn't DELETED; we're good, and the client change will remain |
| // (i.e. client wins, it's on its way to the UP) |
| // 2b) The REQUERY entry is DELETED; we're good (client change remains, it's on |
| // its way to the UP) |
| // 3) the REQUERY was deleted on the server (sheesh; this would be bizarre timing!) - |
| // we need to throw the item out of the cache |
| // So ... the only interesting case is #3, we need to look for remaining deleted items |
| // and see if they're still in the UP |
| Iterator<HashMap.Entry<String, ContentValues>> iter = mCacheMap.entrySet().iterator(); |
| while (iter.hasNext()) { |
| HashMap.Entry<String, ContentValues> entry = iter.next(); |
| ContentValues values = entry.getValue(); |
| if (values.containsKey(REQUERY_COLUMN) && isInUnderlyingCursor(entry.getKey())) { |
| // If we're in a requery and we're still around, remove the requery key |
| // We're good here, the cached change (delete/update) is on its way to UP |
| values.remove(REQUERY_COLUMN); |
| LogUtils.i(TAG, new Error(), |
| "IN resetCursor, remove requery column from %s", entry.getKey()); |
| } else { |
| // Keep the deleted count up-to-date; remove the cache entry |
| if (values.containsKey(DELETED_COLUMN)) { |
| mDeletedCount--; |
| LogUtils.i(TAG, new Error(), |
| "IN resetCursor, sDeletedCount decremented to: %d by %s", |
| mDeletedCount, entry.getKey()); |
| } |
| // Remove the entry |
| iter.remove(); |
| } |
| } |
| |
| // Swap cursor |
| if (mUnderlyingCursor != null) { |
| close(); |
| } |
| mUnderlyingCursor = newCursor; |
| |
| mPosition = -1; |
| mUnderlyingCursor.moveToPosition(mPosition); |
| if (!mCursorObserverRegistered) { |
| mUnderlyingCursor.registerContentObserver(mCursorObserver); |
| mCursorObserverRegistered = true; |
| } |
| mRefreshRequired = false; |
| } |
| } |
| |
| /** |
| * Add a listener for this cursor; we'll notify it when our data changes |
| */ |
| public void addListener(ConversationListener listener) { |
| synchronized (mListeners) { |
| if (!mListeners.contains(listener)) { |
| mListeners.add(listener); |
| } else { |
| LogUtils.i(TAG, "Ignoring duplicate add of listener"); |
| } |
| } |
| } |
| |
| /** |
| * Remove a listener for this cursor |
| */ |
| public void removeListener(ConversationListener listener) { |
| synchronized(mListeners) { |
| mListeners.remove(listener); |
| } |
| } |
| |
| /** |
| * Generate a forwarding Uri to ConversationProvider from an original Uri. We do this by |
| * changing the authority to ours, but otherwise leaving the Uri intact. |
| * NOTE: This won't handle query parameters, so the functionality will need to be added if |
| * parameters are used in the future |
| * @param uri the uri |
| * @return a forwarding uri to ConversationProvider |
| */ |
| private static String uriToCachingUriString (Uri uri) { |
| String provider = uri.getAuthority(); |
| return uri.getScheme() + "://" + ConversationProvider.AUTHORITY |
| + "/" + provider + uri.getPath(); |
| } |
| |
| /** |
| * Regenerate the original Uri from a forwarding (ConversationProvider) Uri |
| * NOTE: See note above for uriToCachingUri |
| * @param uri the forwarding Uri |
| * @return the original Uri |
| */ |
| private static Uri uriFromCachingUri(Uri uri) { |
| String authority = uri.getAuthority(); |
| // Don't modify uri's that aren't ours |
| if (!authority.equals(ConversationProvider.AUTHORITY)) { |
| return uri; |
| } |
| List<String> path = uri.getPathSegments(); |
| Uri.Builder builder = new Uri.Builder().scheme(uri.getScheme()).authority(path.get(0)); |
| for (int i = 1; i < path.size(); i++) { |
| builder.appendPath(path.get(i)); |
| } |
| return builder.build(); |
| } |
| |
| private static String uriStringFromCachingUri(Uri uri) { |
| Uri underlyingUri = uriFromCachingUri(uri); |
| // Remember to decode the underlying Uri as it might be encoded (as w/ Gmail) |
| return Uri.decode(underlyingUri.toString()); |
| } |
| |
| public void setConversationColumn(String uriString, String columnName, Object value) { |
| synchronized (mCacheMapLock) { |
| cacheValue(uriString, columnName, value); |
| } |
| notifyDataChanged(); |
| } |
| |
| /** |
| * Cache a column name/value pair for a given Uri |
| * @param uriString the Uri for which the column name/value pair applies |
| * @param columnName the column name |
| * @param value the value to be cached |
| */ |
| private void cacheValue(String uriString, String columnName, Object value) { |
| // Calling this method off the UI thread will mess with ListView's reading of the cursor's |
| // count |
| if (offUiThread()) { |
| LogUtils.e(TAG, new Error(), "cacheValue incorrectly being called from non-UI thread"); |
| } |
| |
| synchronized (mCacheMapLock) { |
| // Get the map for our uri |
| ContentValues map = mCacheMap.get(uriString); |
| // Create one if necessary |
| if (map == null) { |
| map = new ContentValues(); |
| mCacheMap.put(uriString, map); |
| } |
| // If we're caching a deletion, add to our count |
| if (columnName == DELETED_COLUMN) { |
| final boolean state = (Boolean)value; |
| final boolean hasValue = map.get(columnName) != null; |
| if (state && !hasValue) { |
| mDeletedCount++; |
| if (DEBUG) { |
| LogUtils.i(TAG, "Deleted %s, incremented deleted count=%d", uriString, |
| mDeletedCount); |
| } |
| } else if (!state && hasValue) { |
| mDeletedCount--; |
| map.remove(columnName); |
| if (DEBUG) { |
| LogUtils.i(TAG, "Undeleted %s, decremented deleted count=%d", uriString, |
| mDeletedCount); |
| } |
| return; |
| } else if (!state) { |
| // Trying to undelete, but it's not deleted; just return |
| if (DEBUG) { |
| LogUtils.i(TAG, "Undeleted %s, IGNORING, deleted count=%d", uriString, |
| mDeletedCount); |
| } |
| return; |
| } |
| } |
| // ContentValues has no generic "put", so we must test. For now, the only classes |
| // of values implemented are Boolean/Integer/String, though others are trivially |
| // added |
| if (value instanceof Boolean) { |
| map.put(columnName, ((Boolean) value).booleanValue() ? 1 : 0); |
| } else if (value instanceof Integer) { |
| map.put(columnName, (Integer) value); |
| } else if (value instanceof String) { |
| map.put(columnName, (String) value); |
| } else { |
| final String cname = value.getClass().getName(); |
| throw new IllegalArgumentException("Value class not compatible with cache: " |
| + cname); |
| } |
| if (mRefreshTask != null) { |
| map.put(REQUERY_COLUMN, 1); |
| } |
| if (DEBUG && (columnName != DELETED_COLUMN)) { |
| LogUtils.i(TAG, "Caching value for %s: %s", uriString, columnName); |
| } |
| } |
| } |
| |
| /** |
| * Get the cached value for the provided column; we special case -1 as the "deleted" column |
| * @param columnIndex the index of the column whose cached value we want to retrieve |
| * @return the cached value for this column, or null if there is none |
| */ |
| private Object getCachedValue(int columnIndex) { |
| String uri = mUnderlyingCursor.getString(sUriColumnIndex); |
| return getCachedValue(uri, columnIndex); |
| } |
| |
| private Object getCachedValue(String uri, int columnIndex) { |
| ContentValues uriMap = mCacheMap.get(uri); |
| if (uriMap != null) { |
| String columnName; |
| if (columnIndex == DELETED_COLUMN_INDEX) { |
| columnName = DELETED_COLUMN; |
| } else { |
| columnName = mColumnNames[columnIndex]; |
| } |
| return uriMap.get(columnName); |
| } |
| return null; |
| } |
| |
| /** |
| * When the underlying cursor changes, we want to alert the listener |
| */ |
| private void underlyingChanged() { |
| synchronized(mCacheMapLock) { |
| if (mCursorObserverRegistered) { |
| try { |
| mUnderlyingCursor.unregisterContentObserver(mCursorObserver); |
| } catch (IllegalStateException e) { |
| // Maybe the cursor was GC'd? |
| } |
| mCursorObserverRegistered = false; |
| } |
| mRefreshRequired = true; |
| if (!mPaused) { |
| notifyRefreshRequired(); |
| } |
| } |
| } |
| |
| /** |
| * Must be called on UI thread; notify listeners that a refresh is required |
| */ |
| private void notifyRefreshRequired() { |
| if (DEBUG) { |
| LogUtils.i(TAG, "[Notify " + mName + ": onRefreshRequired()]"); |
| } |
| if (!mDeferSync) { |
| synchronized(mListeners) { |
| for (ConversationListener listener: mListeners) { |
| listener.onRefreshRequired(); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Must be called on UI thread; notify listeners that a new cursor is ready |
| */ |
| private void notifyRefreshReady() { |
| if (DEBUG) { |
| LogUtils.i(TAG, "[Notify " + mName + ": onRefreshReady(), " + mListeners.size() + |
| " listeners]"); |
| } |
| synchronized(mListeners) { |
| for (ConversationListener listener: mListeners) { |
| listener.onRefreshReady(); |
| } |
| } |
| } |
| |
| /** |
| * Must be called on UI thread; notify listeners that data has changed |
| */ |
| private void notifyDataChanged() { |
| if (DEBUG) { |
| LogUtils.i(TAG, "[Notify " + mName + ": onDataSetChanged()]"); |
| } |
| synchronized(mListeners) { |
| for (ConversationListener listener: mListeners) { |
| listener.onDataSetChanged(); |
| } |
| } |
| } |
| |
| /** |
| * Put the refreshed cursor in place (called by the UI) |
| */ |
| public void sync() { |
| if (mRequeryCursor == null) { |
| // This can happen during an animated deletion, if the UI isn't keeping track, or |
| // if a new query intervened (i.e. user changed folders) |
| if (DEBUG) { |
| LogUtils.i(TAG, "[sync() " + mName + "; no requery cursor]"); |
| } |
| return; |
| } |
| synchronized(mCacheMapLock) { |
| if (DEBUG) { |
| LogUtils.i(TAG, "[sync() " + mName+ "]"); |
| } |
| resetCursor(mRequeryCursor); |
| mRequeryCursor = null; |
| mRefreshTask = null; |
| mRefreshReady = false; |
| } |
| notifyDataChanged(); |
| } |
| |
| public boolean isRefreshRequired() { |
| return mRefreshRequired; |
| } |
| |
| public boolean isRefreshReady() { |
| return mRefreshReady; |
| } |
| |
| /** |
| * Cancel a refresh in progress |
| */ |
| public void cancelRefresh() { |
| if (DEBUG) { |
| LogUtils.i(TAG, "[cancelRefresh() " + mName + "]"); |
| } |
| synchronized(mCacheMapLock) { |
| if (mRefreshTask != null) { |
| mRefreshTask.cancel(true); |
| mRefreshTask = null; |
| } |
| mRefreshReady = false; |
| // If we have the cursor, close it; otherwise, it will get closed when the query |
| // finishes (it checks sRefreshInProgress) |
| if (mRequeryCursor != null) { |
| mRequeryCursor.close(); |
| mRequeryCursor = null; |
| } |
| } |
| } |
| |
| /** |
| * Get a list of deletions from ConversationCursor to the refreshed cursor that hasn't yet |
| * been swapped into place; this allows the UI to animate these away if desired |
| * @return a list of positions deleted in ConversationCursor |
| */ |
| public Collection<Conversation> getRefreshDeletions () { |
| return EMPTY_DELETION_LIST; |
| } |
| |
| /** |
| * When we get a requery from the UI, we'll do it, but also clear the cache. The listener is |
| * notified when the requery is complete |
| * NOTE: This will have to change, of course, when we start using loaders... |
| */ |
| public boolean refresh() { |
| if (DEBUG) { |
| LogUtils.i(TAG, "[refresh() " + mName + "]"); |
| } |
| synchronized(mCacheMapLock) { |
| if (mRefreshTask != null) { |
| if (DEBUG) { |
| LogUtils.i(TAG, "[refresh() " + mName + " returning; already running %d]", |
| mRefreshTask.hashCode()); |
| } |
| return false; |
| } |
| mRefreshTask = new RefreshTask(); |
| mRefreshTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); |
| } |
| return true; |
| } |
| |
| public void disable() { |
| close(); |
| mCacheMap.clear(); |
| mListeners.clear(); |
| mUnderlyingCursor = null; |
| } |
| |
| @Override |
| public void close() { |
| if (mUnderlyingCursor != null && !mUnderlyingCursor.isClosed()) { |
| // Unregister our observer on the underlying cursor and close as usual |
| if (mCursorObserverRegistered) { |
| try { |
| mUnderlyingCursor.unregisterContentObserver(mCursorObserver); |
| } catch (IllegalStateException e) { |
| // Maybe the cursor got GC'd? |
| } |
| mCursorObserverRegistered = false; |
| } |
| mUnderlyingCursor.close(); |
| } |
| } |
| |
| /** |
| * Move to the next not-deleted item in the conversation |
| */ |
| @Override |
| public boolean moveToNext() { |
| while (true) { |
| boolean ret = mUnderlyingCursor.moveToNext(); |
| if (!ret) return false; |
| if (getCachedValue(DELETED_COLUMN_INDEX) instanceof Integer) continue; |
| mPosition++; |
| return true; |
| } |
| } |
| |
| /** |
| * Move to the previous not-deleted item in the conversation |
| */ |
| @Override |
| public boolean moveToPrevious() { |
| while (true) { |
| boolean ret = mUnderlyingCursor.moveToPrevious(); |
| if (!ret) return false; |
| if (getCachedValue(DELETED_COLUMN_INDEX) instanceof Integer) continue; |
| mPosition--; |
| return true; |
| } |
| } |
| |
| @Override |
| public int getPosition() { |
| return mPosition; |
| } |
| |
| /** |
| * The actual cursor's count must be decremented by the number we've deleted from the UI |
| */ |
| @Override |
| public int getCount() { |
| if (mUnderlyingCursor == null) { |
| throw new IllegalStateException( |
| "getCount() on disabled cursor: " + mName + "(" + qUri + ")"); |
| } |
| return mUnderlyingCursor.getCount() - mDeletedCount; |
| } |
| |
| @Override |
| public boolean moveToFirst() { |
| if (mUnderlyingCursor == null) { |
| throw new IllegalStateException( |
| "moveToFirst() on disabled cursor: " + mName + "(" + qUri + ")"); |
| } |
| mUnderlyingCursor.moveToPosition(-1); |
| mPosition = -1; |
| return moveToNext(); |
| } |
| |
| @Override |
| public boolean moveToPosition(int pos) { |
| if (mUnderlyingCursor == null) { |
| throw new IllegalStateException( |
| "moveToPosition() on disabled cursor: " + mName + "(" + qUri + ")"); |
| } |
| if (pos == mPosition) return true; |
| if (pos > mPosition) { |
| while (pos > mPosition) { |
| if (!moveToNext()) { |
| return false; |
| } |
| } |
| return true; |
| } else if (pos == 0) { |
| return moveToFirst(); |
| } else { |
| while (pos < mPosition) { |
| if (!moveToPrevious()) { |
| return false; |
| } |
| } |
| return true; |
| } |
| } |
| |
| /** |
| * Make sure mPosition is correct after locally deleting/undeleting items |
| */ |
| private void recalibratePosition() { |
| int pos = mPosition; |
| moveToFirst(); |
| moveToPosition(pos); |
| } |
| |
| @Override |
| public boolean moveToLast() { |
| throw new UnsupportedOperationException("moveToLast unsupported!"); |
| } |
| |
| @Override |
| public boolean move(int offset) { |
| throw new UnsupportedOperationException("move unsupported!"); |
| } |
| |
| /** |
| * We need to override all of the getters to make sure they look at cached values before using |
| * the values in the underlying cursor |
| */ |
| @Override |
| public double getDouble(int columnIndex) { |
| Object obj = getCachedValue(columnIndex); |
| if (obj != null) return (Double)obj; |
| return mUnderlyingCursor.getDouble(columnIndex); |
| } |
| |
| @Override |
| public float getFloat(int columnIndex) { |
| Object obj = getCachedValue(columnIndex); |
| if (obj != null) return (Float)obj; |
| return mUnderlyingCursor.getFloat(columnIndex); |
| } |
| |
| @Override |
| public int getInt(int columnIndex) { |
| Object obj = getCachedValue(columnIndex); |
| if (obj != null) return (Integer)obj; |
| return mUnderlyingCursor.getInt(columnIndex); |
| } |
| |
| @Override |
| public long getLong(int columnIndex) { |
| Object obj = getCachedValue(columnIndex); |
| if (obj != null) return (Long)obj; |
| return mUnderlyingCursor.getLong(columnIndex); |
| } |
| |
| @Override |
| public short getShort(int columnIndex) { |
| Object obj = getCachedValue(columnIndex); |
| if (obj != null) return (Short)obj; |
| return mUnderlyingCursor.getShort(columnIndex); |
| } |
| |
| @Override |
| public String getString(int columnIndex) { |
| // If we're asking for the Uri for the conversation list, we return a forwarding URI |
| // so that we can intercept update/delete and handle it ourselves |
| if (columnIndex == sUriColumnIndex) { |
| Uri uri = Uri.parse(mUnderlyingCursor.getString(columnIndex)); |
| return uriToCachingUriString(uri); |
| } |
| Object obj = getCachedValue(columnIndex); |
| if (obj != null) return (String)obj; |
| return mUnderlyingCursor.getString(columnIndex); |
| } |
| |
| @Override |
| public byte[] getBlob(int columnIndex) { |
| Object obj = getCachedValue(columnIndex); |
| if (obj != null) return (byte[])obj; |
| return mUnderlyingCursor.getBlob(columnIndex); |
| } |
| |
| /** |
| * Observer of changes to underlying data |
| */ |
| private class CursorObserver extends ContentObserver { |
| public CursorObserver() { |
| super(null); |
| } |
| |
| @Override |
| public void onChange(boolean selfChange) { |
| // If we're here, then something outside of the UI has changed the data, and we |
| // must query the underlying provider for that data |
| ConversationCursor.this.underlyingChanged(); |
| } |
| } |
| |
| /** |
| * ConversationProvider is the ContentProvider for our forwarding Uri's; it passes queries |
| * and inserts directly, and caches updates/deletes before passing them through. The caching |
| * will cause a redraw of the list with updated values. |
| */ |
| public abstract static class ConversationProvider extends ContentProvider { |
| public static String AUTHORITY; |
| |
| /** |
| * Allows the implementing provider to specify the authority that should be used. |
| */ |
| protected abstract String getAuthority(); |
| |
| @Override |
| public boolean onCreate() { |
| sProvider = this; |
| AUTHORITY = getAuthority(); |
| return true; |
| } |
| |
| @Override |
| public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, |
| String sortOrder) { |
| return sResolver.query( |
| uriFromCachingUri(uri), projection, selection, selectionArgs, sortOrder); |
| } |
| |
| @Override |
| public Uri insert(Uri uri, ContentValues values) { |
| insertLocal(uri, values); |
| return ProviderExecute.opInsert(uri, values); |
| } |
| |
| @Override |
| public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { |
| throw new IllegalStateException("Unexpected call to ConversationProvider.delete"); |
| // updateLocal(uri, values); |
| // return ProviderExecute.opUpdate(uri, values); |
| } |
| |
| @Override |
| public int delete(Uri uri, String selection, String[] selectionArgs) { |
| throw new IllegalStateException("Unexpected call to ConversationProvider.delete"); |
| //deleteLocal(uri); |
| // return ProviderExecute.opDelete(uri); |
| } |
| |
| @Override |
| public String getType(Uri uri) { |
| return null; |
| } |
| |
| /** |
| * Quick and dirty class that executes underlying provider CRUD operations on a background |
| * thread. |
| */ |
| static class ProviderExecute implements Runnable { |
| static final int DELETE = 0; |
| static final int INSERT = 1; |
| static final int UPDATE = 2; |
| |
| final int mCode; |
| final Uri mUri; |
| final ContentValues mValues; //HEHEH |
| |
| ProviderExecute(int code, Uri uri, ContentValues values) { |
| mCode = code; |
| mUri = uriFromCachingUri(uri); |
| mValues = values; |
| } |
| |
| ProviderExecute(int code, Uri uri) { |
| this(code, uri, null); |
| } |
| |
| static Uri opInsert(Uri uri, ContentValues values) { |
| ProviderExecute e = new ProviderExecute(INSERT, uri, values); |
| if (offUiThread()) return (Uri)e.go(); |
| new Thread(e).start(); |
| return null; |
| } |
| |
| static int opDelete(Uri uri) { |
| ProviderExecute e = new ProviderExecute(DELETE, uri); |
| if (offUiThread()) return (Integer)e.go(); |
| new Thread(new ProviderExecute(DELETE, uri)).start(); |
| return 0; |
| } |
| |
| static int opUpdate(Uri uri, ContentValues values) { |
| ProviderExecute e = new ProviderExecute(UPDATE, uri, values); |
| if (offUiThread()) return (Integer)e.go(); |
| new Thread(e).start(); |
| return 0; |
| } |
| |
| @Override |
| public void run() { |
| go(); |
| } |
| |
| public Object go() { |
| switch(mCode) { |
| case DELETE: |
| return sResolver.delete(mUri, null, null); |
| case INSERT: |
| return sResolver.insert(mUri, mValues); |
| case UPDATE: |
| return sResolver.update(mUri, mValues, null, null); |
| default: |
| return null; |
| } |
| } |
| } |
| |
| private void insertLocal(Uri uri, ContentValues values) { |
| // Placeholder for now; there's no local insert |
| } |
| |
| private int mUndoSequence = 0; |
| private ArrayList<Uri> mUndoDeleteUris = new ArrayList<Uri>(); |
| |
| void addToUndoSequence(Uri uri) { |
| if (sSequence != mUndoSequence) { |
| mUndoSequence = sSequence; |
| mUndoDeleteUris.clear(); |
| } |
| mUndoDeleteUris.add(uri); |
| } |
| |
| @VisibleForTesting |
| void deleteLocal(Uri uri, ConversationCursor conversationCursor) { |
| String uriString = uriStringFromCachingUri(uri); |
| conversationCursor.cacheValue(uriString, DELETED_COLUMN, true); |
| addToUndoSequence(uri); |
| } |
| |
| @VisibleForTesting |
| void undeleteLocal(Uri uri, ConversationCursor conversationCursor) { |
| String uriString = uriStringFromCachingUri(uri); |
| conversationCursor.cacheValue(uriString, DELETED_COLUMN, false); |
| } |
| |
| void setMostlyDead(Conversation conv, ConversationCursor conversationCursor) { |
| Uri uri = conv.uri; |
| String uriString = uriStringFromCachingUri(uri); |
| conversationCursor.setMostlyDead(uriString, conv); |
| addToUndoSequence(uri); |
| } |
| |
| void commitMostlyDead(Conversation conv, ConversationCursor conversationCursor) { |
| conversationCursor.commitMostlyDead(conv); |
| } |
| |
| boolean clearMostlyDead(Uri uri, ConversationCursor conversationCursor) { |
| String uriString = uriStringFromCachingUri(uri); |
| return conversationCursor.clearMostlyDead(uriString); |
| } |
| |
| public void undo(ConversationCursor conversationCursor) { |
| if (sSequence == mUndoSequence) { |
| for (Uri uri: mUndoDeleteUris) { |
| if (!clearMostlyDead(uri, conversationCursor)) { |
| undeleteLocal(uri, conversationCursor); |
| } |
| } |
| mUndoSequence = 0; |
| conversationCursor.recalibratePosition(); |
| } |
| } |
| |
| @VisibleForTesting |
| void updateLocal(Uri uri, ContentValues values, ConversationCursor conversationCursor) { |
| if (values == null) { |
| return; |
| } |
| String uriString = uriStringFromCachingUri(uri); |
| for (String columnName: values.keySet()) { |
| conversationCursor.cacheValue(uriString, columnName, values.get(columnName)); |
| } |
| } |
| |
| public int apply(ArrayList<ConversationOperation> ops, |
| ConversationCursor conversationCursor) { |
| final HashMap<String, ArrayList<ContentProviderOperation>> batchMap = |
| new HashMap<String, ArrayList<ContentProviderOperation>>(); |
| // Increment sequence count |
| sSequence++; |
| |
| // Execute locally and build CPO's for underlying provider |
| boolean recalibrateRequired = false; |
| for (ConversationOperation op: ops) { |
| Uri underlyingUri = uriFromCachingUri(op.mUri); |
| String authority = underlyingUri.getAuthority(); |
| ArrayList<ContentProviderOperation> authOps = batchMap.get(authority); |
| if (authOps == null) { |
| authOps = new ArrayList<ContentProviderOperation>(); |
| batchMap.put(authority, authOps); |
| } |
| ContentProviderOperation cpo = op.execute(underlyingUri); |
| if (cpo != null) { |
| authOps.add(cpo); |
| } |
| // Keep track of whether our operations require recalibrating the cursor position |
| if (op.mRecalibrateRequired) { |
| recalibrateRequired = true; |
| } |
| } |
| |
| // Notify listeners that data has changed |
| conversationCursor.notifyDataChanged(); |
| |
| // Recalibrate cursor position if required |
| if (recalibrateRequired) { |
| conversationCursor.recalibratePosition(); |
| } |
| |
| // Send changes to underlying provider |
| for (String authority: batchMap.keySet()) { |
| try { |
| if (offUiThread()) { |
| sResolver.applyBatch(authority, batchMap.get(authority)); |
| } else { |
| final String auth = authority; |
| new Thread(new Runnable() { |
| @Override |
| public void run() { |
| try { |
| sResolver.applyBatch(auth, batchMap.get(auth)); |
| } catch (RemoteException e) { |
| } catch (OperationApplicationException e) { |
| } |
| } |
| }).start(); |
| } |
| } catch (RemoteException e) { |
| } catch (OperationApplicationException e) { |
| } |
| } |
| return sSequence; |
| } |
| } |
| |
| void setMostlyDead(String uriString, Conversation conv) { |
| LogUtils.i(TAG, "[Mostly dead, deferring: %s] ", uriString); |
| cacheValue(uriString, |
| UIProvider.ConversationColumns.FLAGS, Conversation.FLAG_MOSTLY_DEAD); |
| conv.convFlags |= Conversation.FLAG_MOSTLY_DEAD; |
| sMostlyDead.add(conv); |
| mDeferSync = true; |
| } |
| |
| void commitMostlyDead(Conversation conv) { |
| conv.convFlags &= ~Conversation.FLAG_MOSTLY_DEAD; |
| sMostlyDead.remove(conv); |
| LogUtils.i(TAG, "[All dead: %s]", conv.uri); |
| if (sMostlyDead.isEmpty()) { |
| mDeferSync = false; |
| checkNotifyUI(); |
| } |
| } |
| |
| boolean clearMostlyDead(String uriString) { |
| Object val = getCachedValue(uriString, |
| UIProvider.CONVERSATION_FLAGS_COLUMN); |
| if (val != null) { |
| int flags = ((Integer)val).intValue(); |
| if ((flags & Conversation.FLAG_MOSTLY_DEAD) != 0) { |
| cacheValue(uriString, UIProvider.ConversationColumns.FLAGS, |
| flags &= ~Conversation.FLAG_MOSTLY_DEAD); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| |
| |
| |
| /** |
| * ConversationOperation is the encapsulation of a ContentProvider operation to be performed |
| * atomically as part of a "batch" operation. |
| */ |
| public class ConversationOperation { |
| private static final int MOSTLY = 0x80; |
| public static final int DELETE = 0; |
| public static final int INSERT = 1; |
| public static final int UPDATE = 2; |
| public static final int ARCHIVE = 3; |
| public static final int MUTE = 4; |
| public static final int REPORT_SPAM = 5; |
| public static final int REPORT_NOT_SPAM = 6; |
| public static final int MOSTLY_ARCHIVE = MOSTLY | ARCHIVE; |
| public static final int MOSTLY_DELETE = MOSTLY | DELETE; |
| |
| private final int mType; |
| private final Uri mUri; |
| private final Conversation mConversation; |
| private final ContentValues mValues; |
| // True if an updated item should be removed locally (from ConversationCursor) |
| // This would be the case for a folder change in which the conversation is no longer |
| // in the folder represented by the ConversationCursor |
| private final boolean mLocalDeleteOnUpdate; |
| // After execution, this indicates whether or not the operation requires recalibration of |
| // the current cursor position (i.e. it removed or added items locally) |
| private boolean mRecalibrateRequired = true; |
| // Whether this item is already mostly dead |
| private final boolean mMostlyDead; |
| |
| /** |
| * Set to true to immediately notify any {@link DataSetObserver}s watching the global |
| * {@link ConversationCursor} upon applying the change to the data cache. You would not |
| * want to do this if a change you make is being handled specially, like an animated delete. |
| * |
| * TODO: move this to the application Controller, or whoever has a canonical reference |
| * to a {@link ConversationCursor} to notify on. |
| */ |
| private final boolean mAutoNotify; |
| |
| public ConversationOperation(int type, Conversation conv) { |
| this(type, conv, null, false /* autoNotify */); |
| } |
| |
| public ConversationOperation(int type, Conversation conv, ContentValues values, |
| boolean autoNotify) { |
| mType = type; |
| mUri = conv.uri; |
| mConversation = conv; |
| mValues = values; |
| mLocalDeleteOnUpdate = conv.localDeleteOnUpdate; |
| mAutoNotify = autoNotify; |
| mMostlyDead = conv.isMostlyDead(); |
| } |
| |
| private ContentProviderOperation execute(Uri underlyingUri) { |
| Uri uri = underlyingUri.buildUpon() |
| .appendQueryParameter(UIProvider.SEQUENCE_QUERY_PARAMETER, |
| Integer.toString(sSequence)) |
| .build(); |
| ContentProviderOperation op = null; |
| switch(mType) { |
| case UPDATE: |
| if (mLocalDeleteOnUpdate) { |
| sProvider.deleteLocal(mUri, ConversationCursor.this); |
| } else { |
| sProvider.updateLocal(mUri, mValues, ConversationCursor.this); |
| mRecalibrateRequired = false; |
| } |
| op = ContentProviderOperation.newUpdate(uri) |
| .withValues(mValues) |
| .build(); |
| break; |
| case INSERT: |
| sProvider.insertLocal(mUri, mValues); |
| op = ContentProviderOperation.newInsert(uri) |
| .withValues(mValues).build(); |
| break; |
| // Destructive actions below! |
| // "Mostly" operations are reflected globally, but not locally, except to set |
| // FLAG_MOSTLY_DEAD in the conversation itself |
| case DELETE: |
| sProvider.deleteLocal(mUri, ConversationCursor.this); |
| if (!mMostlyDead) { |
| op = ContentProviderOperation.newDelete(uri).build(); |
| } else { |
| sProvider.commitMostlyDead(mConversation, ConversationCursor.this); |
| } |
| break; |
| case MOSTLY_DELETE: |
| sProvider.setMostlyDead(mConversation,ConversationCursor.this); |
| op = ContentProviderOperation.newDelete(uri).build(); |
| break; |
| case ARCHIVE: |
| sProvider.deleteLocal(mUri, ConversationCursor.this); |
| if (!mMostlyDead) { |
| // Create an update operation that represents archive |
| op = ContentProviderOperation.newUpdate(uri).withValue( |
| ConversationOperations.OPERATION_KEY, |
| ConversationOperations.ARCHIVE) |
| .build(); |
| } else { |
| sProvider.commitMostlyDead(mConversation, ConversationCursor.this); |
| } |
| break; |
| case MOSTLY_ARCHIVE: |
| sProvider.setMostlyDead(mConversation, ConversationCursor.this); |
| // Create an update operation that represents archive |
| op = ContentProviderOperation.newUpdate(uri).withValue( |
| ConversationOperations.OPERATION_KEY, ConversationOperations.ARCHIVE) |
| .build(); |
| break; |
| case MUTE: |
| if (mLocalDeleteOnUpdate) { |
| sProvider.deleteLocal(mUri, ConversationCursor.this); |
| } |
| |
| // Create an update operation that represents mute |
| op = ContentProviderOperation.newUpdate(uri).withValue( |
| ConversationOperations.OPERATION_KEY, ConversationOperations.MUTE) |
| .build(); |
| break; |
| case REPORT_SPAM: |
| case REPORT_NOT_SPAM: |
| sProvider.deleteLocal(mUri, ConversationCursor.this); |
| |
| final String operation = mType == REPORT_SPAM ? |
| ConversationOperations.REPORT_SPAM : |
| ConversationOperations.REPORT_NOT_SPAM; |
| |
| // Create an update operation that represents report spam |
| op = ContentProviderOperation.newUpdate(uri).withValue( |
| ConversationOperations.OPERATION_KEY, operation).build(); |
| break; |
| default: |
| throw new UnsupportedOperationException( |
| "No such ConversationOperation type: " + mType); |
| } |
| |
| // FIXME: this is a hack to notify conversation list of changes from conversation view. |
| // The proper way to do this is to have the Controller handle the 'mark read' action. |
| // It has a reference to this ConversationCursor so it can notify without using global |
| // magic. |
| if (mAutoNotify) { |
| notifyDataSetChanged(); |
| } |
| |
| return op; |
| } |
| } |
| |
| /** |
| * For now, a single listener can be associated with the cursor, and for now we'll just |
| * notify on deletions |
| */ |
| public interface ConversationListener { |
| /** |
| * Data in the underlying provider has changed; a refresh is required to sync up |
| */ |
| public void onRefreshRequired(); |
| /** |
| * We've completed a requested refresh of the underlying cursor |
| */ |
| public void onRefreshReady(); |
| /** |
| * The data underlying the cursor has changed; the UI should redraw the list |
| */ |
| public void onDataSetChanged(); |
| } |
| |
| @Override |
| public boolean isFirst() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public boolean isLast() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public boolean isBeforeFirst() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public boolean isAfterLast() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public int getColumnIndex(String columnName) { |
| return mUnderlyingCursor.getColumnIndex(columnName); |
| } |
| |
| @Override |
| public int getColumnIndexOrThrow(String columnName) throws IllegalArgumentException { |
| return mUnderlyingCursor.getColumnIndexOrThrow(columnName); |
| } |
| |
| @Override |
| public String getColumnName(int columnIndex) { |
| return mUnderlyingCursor.getColumnName(columnIndex); |
| } |
| |
| @Override |
| public String[] getColumnNames() { |
| return mUnderlyingCursor.getColumnNames(); |
| } |
| |
| @Override |
| public int getColumnCount() { |
| return mUnderlyingCursor.getColumnCount(); |
| } |
| |
| @Override |
| public void copyStringToBuffer(int columnIndex, CharArrayBuffer buffer) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public int getType(int columnIndex) { |
| return mUnderlyingCursor.getType(columnIndex); |
| } |
| |
| @Override |
| public boolean isNull(int columnIndex) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void deactivate() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public boolean isClosed() { |
| return mUnderlyingCursor == null || mUnderlyingCursor.isClosed(); |
| } |
| |
| @Override |
| public void registerContentObserver(ContentObserver observer) { |
| // Nope. We never notify of underlying changes on this channel, since the cursor watches |
| // internally and offers onRefreshRequired/onRefreshReady to accomplish the same thing. |
| } |
| |
| @Override |
| public void unregisterContentObserver(ContentObserver observer) { |
| // See above. |
| } |
| |
| @Override |
| public void registerDataSetObserver(DataSetObserver observer) { |
| mDataSetObservable.registerObserver(observer); |
| } |
| |
| @Override |
| public void unregisterDataSetObserver(DataSetObserver observer) { |
| mDataSetObservable.unregisterObserver(observer); |
| } |
| |
| public void notifyDataSetChanged() { |
| mDataSetObservable.notifyChanged(); |
| } |
| |
| @Override |
| public void setNotificationUri(ContentResolver cr, Uri uri) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public boolean getWantsAllOnMoveCalls() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public Bundle getExtras() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public Bundle respond(Bundle extras) { |
| if (mUnderlyingCursor != null) { |
| return mUnderlyingCursor.respond(extras); |
| } |
| return Bundle.EMPTY; |
| } |
| |
| @Override |
| public boolean requery() { |
| return true; |
| } |
| |
| // Below are methods that update Conversation data (update/delete) |
| |
| public int updateBoolean(Context context, Conversation conversation, String columnName, |
| boolean value) { |
| return updateBoolean(context, Arrays.asList(conversation), columnName, value); |
| } |
| |
| /** |
| * Update an integer column for a group of conversations (see updateValues below) |
| */ |
| public int updateInt(Context context, Collection<Conversation> conversations, |
| String columnName, int value) { |
| ContentValues cv = new ContentValues(); |
| cv.put(columnName, value); |
| return updateValues(context, conversations, cv); |
| } |
| |
| /** |
| * Update a string column for a group of conversations (see updateValues below) |
| */ |
| public int updateBoolean(Context context, Collection<Conversation> conversations, |
| String columnName, boolean value) { |
| ContentValues cv = new ContentValues(); |
| cv.put(columnName, value); |
| return updateValues(context, conversations, cv); |
| } |
| |
| /** |
| * Update a string column for a group of conversations (see updateValues below) |
| */ |
| public int updateString(Context context, Collection<Conversation> conversations, |
| String columnName, String value) { |
| ContentValues cv = new ContentValues(); |
| cv.put(columnName, value); |
| return updateValues(context, conversations, cv); |
| } |
| |
| public int updateBoolean(Context context, String conversationUri, String columnName, |
| boolean value) { |
| Conversation conv = new Conversation(); |
| conv.uri = Uri.parse(conversationUri); |
| return updateBoolean(context, conv, columnName, value); |
| } |
| |
| /** |
| * Update a boolean column for a group of conversations, immediately in the UI and in a single |
| * transaction in the underlying provider |
| * @param conversations a collection of conversations |
| * @param context the caller's context |
| * @param columnName the column to update |
| * @param value the new value |
| * @return the sequence number of the operation (for undo) |
| */ |
| private int updateValues(Context context, Collection<Conversation> conversations, |
| ContentValues values) { |
| return apply(context, |
| getOperationsForConversations(conversations, ConversationOperation.UPDATE, values)); |
| } |
| |
| private ArrayList<ConversationOperation> getOperationsForConversations( |
| Collection<Conversation> conversations, int op, ContentValues values) { |
| return getOperationsForConversations(conversations, op, values, false /* autoNotify */); |
| } |
| |
| private ArrayList<ConversationOperation> getOperationsForConversations( |
| Collection<Conversation> conversations, int type, ContentValues values, |
| boolean autoNotify) { |
| final ArrayList<ConversationOperation> ops = Lists.newArrayList(); |
| for (Conversation conv: conversations) { |
| ConversationOperation op = new ConversationOperation(type, conv, values, autoNotify); |
| ops.add(op); |
| } |
| return ops; |
| } |
| |
| /** |
| * Delete a single conversation |
| * @param context the caller's context |
| * @return the sequence number of the operation (for undo) |
| */ |
| public int delete(Context context, Conversation conversation) { |
| ArrayList<Conversation> conversations = new ArrayList<Conversation>(); |
| conversations.add(conversation); |
| return delete(context, conversations); |
| } |
| |
| /** |
| * Delete a single conversation |
| * @param context the caller's context |
| * @return the sequence number of the operation (for undo) |
| */ |
| public int mostlyArchive(Context context, Conversation conversation) { |
| ArrayList<Conversation> conversations = new ArrayList<Conversation>(); |
| conversations.add(conversation); |
| return archive(context, conversations); |
| } |
| |
| /** |
| * Delete a single conversation |
| * @param context the caller's context |
| * @return the sequence number of the operation (for undo) |
| */ |
| public int mostlyDelete(Context context, Conversation conversation) { |
| ArrayList<Conversation> conversations = new ArrayList<Conversation>(); |
| conversations.add(conversation); |
| return delete(context, conversations); |
| } |
| |
| /** |
| * Mark a single conversation read/unread. |
| * @param context the caller's context |
| * @param read true for read, false for unread |
| * @return the sequence number of the operation (for undo) |
| */ |
| public int markRead(Context context, boolean read, Conversation conversation) { |
| ContentValues values = new ContentValues(); |
| values.put(ConversationColumns.READ, read); |
| ArrayList<Conversation> conversations = new ArrayList<Conversation>(); |
| conversations.add(conversation); |
| return apply( |
| context, |
| getOperationsForConversations(conversations, ConversationOperation.UPDATE, |
| values, true /* autoNotify */)); |
| } |
| |
| // Convenience methods |
| private int apply(Context context, ArrayList<ConversationOperation> operations) { |
| return sProvider.apply(operations, this); |
| } |
| |
| private void undoLocal() { |
| sProvider.undo(this); |
| } |
| |
| public void undo(final Context context, final Uri undoUri) { |
| new Thread(new Runnable() { |
| @Override |
| public void run() { |
| Cursor c = context.getContentResolver().query(undoUri, UIProvider.UNDO_PROJECTION, |
| null, null, null); |
| if (c != null) { |
| c.close(); |
| } |
| } |
| }).start(); |
| undoLocal(); |
| } |
| |
| /** |
| * Delete a group of conversations immediately in the UI and in a single transaction in the |
| * underlying provider. See applyAction for argument descriptions |
| */ |
| public int delete(Context context, Collection<Conversation> conversations) { |
| return applyAction(context, conversations, ConversationOperation.DELETE); |
| } |
| |
| /** |
| * As above, for archive |
| */ |
| public int archive(Context context, Collection<Conversation> conversations) { |
| return applyAction(context, conversations, ConversationOperation.ARCHIVE); |
| } |
| |
| /** |
| * As above, for mute |
| */ |
| public int mute(Context context, Collection<Conversation> conversations) { |
| return applyAction(context, conversations, ConversationOperation.MUTE); |
| } |
| |
| /** |
| * As above, for report spam |
| */ |
| public int reportSpam(Context context, Collection<Conversation> conversations) { |
| return applyAction(context, conversations, ConversationOperation.REPORT_SPAM); |
| } |
| |
| /** |
| * As above, for report not spam |
| */ |
| public int reportNotSpam(Context context, Collection<Conversation> conversations) { |
| return applyAction(context, conversations, ConversationOperation.REPORT_NOT_SPAM); |
| } |
| |
| /** |
| * As above, for mostly archive |
| */ |
| public int mostlyArchive(Context context, Collection<Conversation> conversations) { |
| return applyAction(context, conversations, ConversationOperation.MOSTLY_ARCHIVE); |
| } |
| |
| /** |
| * As above, for mostly delete |
| */ |
| public int mostlyDelete(Context context, Collection<Conversation> conversations) { |
| return applyAction(context, conversations, ConversationOperation.MOSTLY_DELETE); |
| } |
| |
| /** |
| * Convenience method for performing an operation on a group of conversations |
| * @param context the caller's context |
| * @param conversations the conversations to be affected |
| * @param opAction the action to take |
| * @return the sequence number of the operation applied in CC |
| */ |
| private int applyAction(Context context, Collection<Conversation> conversations, |
| int opAction) { |
| ArrayList<ConversationOperation> ops = Lists.newArrayList(); |
| for (Conversation conv: conversations) { |
| ConversationOperation op = |
| new ConversationOperation(opAction, conv); |
| ops.add(op); |
| } |
| return apply(context, ops); |
| } |
| |
| } |