mirror of
https://github.com/moparisthebest/k-9
synced 2024-11-24 02:12:15 -05:00
Switch MergeCursor from using a List to an array
This commit is contained in:
cketti
parent
49a5a3b7ff
commit
08fba5468f
@ -338,7 +338,7 @@ public class MessageListFragment extends SherlockFragment implements OnItemClick
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private String[] mAccountUuids;
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private int mUnreadMessageCount = 0;
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private Map<Integer, Cursor> mCursors = new HashMap<Integer, Cursor>();
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private Cursor[] mCursors;
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/**
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* Stores the name of the folder that we want to open as soon as possible
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@ -700,7 +700,9 @@ public class MessageListFragment extends SherlockFragment implements OnItemClick
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initializeMessageList();
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LoaderManager loaderManager = getLoaderManager();
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for (int i = 0, len = mAccountUuids.length; i < len; i++) {
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int len = mAccountUuids.length;
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mCursors = new Cursor[len];
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for (int i = 0; i < len; i++) {
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loaderManager.initLoader(i, null, this);
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}
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}
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@ -2757,16 +2759,9 @@ public class MessageListFragment extends SherlockFragment implements OnItemClick
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@Override
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public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
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mCursors.put(loader.getId(), data);
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mCursors[loader.getId()] = data;
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List<Integer> list = new LinkedList<Integer>(mCursors.keySet());
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Collections.sort(list);
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List<Cursor> cursors = new ArrayList<Cursor>(list.size());
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for (Integer id : list) {
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cursors.add(mCursors.get(id));
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}
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MergeCursorWithUniqueId cursor = new MergeCursorWithUniqueId(cursors);
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MergeCursorWithUniqueId cursor = new MergeCursorWithUniqueId(mCursors);
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mSelected = new SparseBooleanArray(cursor.getCount());
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//TODO: use the (stable) IDs as index and reuse the old mSelected
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@ -1,7 +1,23 @@
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/*
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* Copyright (C) 2012 The K-9 Dog Walkers
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.fsck.k9.helper;
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import java.util.List;
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import android.annotation.TargetApi;
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import android.content.ContentResolver;
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import android.database.CharArrayBuffer;
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import android.database.ContentObserver;
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@ -18,7 +34,7 @@ public class MergeCursor implements Cursor {
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/**
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* List of the cursors combined in this object.
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*/
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protected final List<Cursor> mCursors;
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protected final Cursor[] mCursors;
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/**
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* The currently active cursor.
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@ -32,6 +48,8 @@ public class MergeCursor implements Cursor {
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*/
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protected int mActiveCursorIndex;
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protected int mPosition;
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/**
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* Used to cache the value of {@link #getCount()}
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*/
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@ -44,18 +62,26 @@ public class MergeCursor implements Cursor {
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* @param cursors
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* The list of cursors this {@code MultiCursor} should combine.
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*/
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public MergeCursor(List<Cursor> cursors) {
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mCursors = cursors;
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mActiveCursorIndex = 0;
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mActiveCursor = cursors.get(0);
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public MergeCursor(Cursor[] cursors) {
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mCursors = cursors.clone();
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for (int i = 0, len = mCursors.length; i < len; i++) {
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if (mCursors[i] != null) {
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mActiveCursorIndex = i;
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mActiveCursor = mCursors[mActiveCursorIndex];
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}
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}
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mPosition = -1;
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}
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@Override
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public void close() {
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for (Cursor cursor : mCursors) {
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if (cursor != null) {
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cursor.close();
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}
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}
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}
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@Override
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public void copyStringToBuffer(int columnIndex, CharArrayBuffer buffer) {
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@ -65,9 +91,11 @@ public class MergeCursor implements Cursor {
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@Override
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public void deactivate() {
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for (Cursor cursor : mCursors) {
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if (cursor != null) {
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cursor.deactivate();
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}
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}
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}
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@Override
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public byte[] getBlob(int columnIndex) {
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@ -105,8 +133,10 @@ public class MergeCursor implements Cursor {
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if (mCount == -1) {
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int count = 0;
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for (Cursor cursor : mCursors) {
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if (cursor != null) {
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count += cursor.getCount();
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}
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}
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mCount = count;
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}
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@ -136,12 +166,7 @@ public class MergeCursor implements Cursor {
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@Override
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public int getPosition() {
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int pos = 0;
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for (int i = 0; i < mActiveCursorIndex; i++) {
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pos += mCursors.get(i).getCount();
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}
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return pos + mActiveCursor.getPosition();
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return mPosition;
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}
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@Override
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@ -154,6 +179,7 @@ public class MergeCursor implements Cursor {
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return mActiveCursor.getString(columnIndex);
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}
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@TargetApi(11)
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@Override
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public int getType(int columnIndex) {
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return mActiveCursor.getType(columnIndex);
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@ -166,20 +192,21 @@ public class MergeCursor implements Cursor {
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@Override
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public boolean isAfterLast() {
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if (mActiveCursorIndex == mCursors.size() - 1) {
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return mActiveCursor.isAfterLast();
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int count = getCount();
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if (count == 0) {
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return true;
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}
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return false;
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return (mPosition == count);
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}
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@Override
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public boolean isBeforeFirst() {
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if (mActiveCursorIndex == 0) {
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return mActiveCursor.isBeforeFirst();
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if (getCount() == 0) {
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return true;
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}
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return false;
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return (mPosition == -1);
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}
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@Override
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@ -189,20 +216,21 @@ public class MergeCursor implements Cursor {
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@Override
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public boolean isFirst() {
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if (mActiveCursorIndex == 0) {
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return mActiveCursor.isFirst();
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if (getCount() == 0) {
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return false;
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}
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return false;
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return (mPosition == 0);
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}
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@Override
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public boolean isLast() {
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if (mActiveCursorIndex == mCursors.size() - 1) {
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return mActiveCursor.isLast();
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int count = getCount();
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if (count == 0) {
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return false;
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}
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return false;
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return (mPosition == (count - 1));
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}
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@Override
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@ -212,81 +240,78 @@ public class MergeCursor implements Cursor {
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@Override
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public boolean move(int offset) {
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int ofs = offset;
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int pos = mActiveCursor.getPosition();
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if (offset >= 0) {
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while (pos + ofs > mActiveCursor.getCount() &
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mActiveCursorIndex < mCursors.size() - 1) {
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// Adjust the "move offset"
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ofs -= mActiveCursor.getCount() - pos;
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// Move to the next cursor
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mActiveCursor = mCursors.get(++mActiveCursorIndex);
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// Move the new cursor to the first position
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mActiveCursor.moveToFirst();
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pos = 0;
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}
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} else {
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while (pos + ofs < 0 && mActiveCursorIndex > 0) {
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// Adjust the "move offset"
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ofs += pos;
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// Move to the next cursor
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mActiveCursor = mCursors.get(--mActiveCursorIndex);
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// Move the new cursor to the first position
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mActiveCursor.moveToLast();
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pos = mActiveCursor.getPosition();
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}
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}
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return mActiveCursor.move(ofs);
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return moveToPosition(mPosition + offset);
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}
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@Override
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public boolean moveToFirst() {
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mActiveCursorIndex = 0;
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mActiveCursor = mCursors.get(mActiveCursorIndex);
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return mActiveCursor.moveToFirst();
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return moveToPosition(0);
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}
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@Override
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public boolean moveToLast() {
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mActiveCursorIndex = mCursors.size() - 1;
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mActiveCursor = mCursors.get(mActiveCursorIndex);
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return mActiveCursor.moveToLast();
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return moveToPosition(getCount() - 1);
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}
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@Override
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public boolean moveToNext() {
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return move(1);
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return moveToPosition(mPosition + 1);
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}
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@Override
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public boolean moveToPosition(int position) {
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// Start at the beginning
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mActiveCursorIndex = 0;
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mActiveCursor = mCursors.get(mActiveCursorIndex);
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int pos = position;
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while (pos > mActiveCursor.getCount() - 1 &&
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mActiveCursorIndex < mCursors.size() - 1) {
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// Adjust the position
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pos -= mActiveCursor.getCount();
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// Move to the next cursor
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mActiveCursor = mCursors.get(++mActiveCursorIndex);
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// Make sure position isn't past the end of the cursor
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final int count = getCount();
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if (position >= count) {
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mPosition = count;
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return false;
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}
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return mActiveCursor.moveToPosition(pos);
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// Make sure position isn't before the beginning of the cursor
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if (position < 0) {
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mPosition = -1;
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return false;
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}
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// Check for no-op moves, and skip the rest of the work for them
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if (position == mPosition) {
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return true;
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}
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/* Find the right cursor */
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mActiveCursor = null;
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mActiveCursorIndex = -1;
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mPosition = -1;
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int cursorStartPos = 0;
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for (int i = 0, len = mCursors.length; i < len; i++) {
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if (mCursors[i] == null) {
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continue;
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}
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if (position < (cursorStartPos + mCursors[i].getCount())) {
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mActiveCursorIndex = i;
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mActiveCursor = mCursors[mActiveCursorIndex];
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break;
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}
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cursorStartPos += mCursors[i].getCount();
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}
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/* Move it to the right position */
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if (mActiveCursor != null) {
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boolean success = mActiveCursor.moveToPosition(position - cursorStartPos);
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mPosition = (success) ? position : -1;
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return success;
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}
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return false;
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}
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@Override
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public boolean moveToPrevious() {
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return move(-1);
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return moveToPosition(mPosition - 1);
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}
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@Override
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@ -1,7 +1,5 @@
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package com.fsck.k9.helper;
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import java.util.List;
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import android.database.Cursor;
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@ -14,10 +12,10 @@ public class MergeCursorWithUniqueId extends MergeCursor {
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private int mIdColumnIndex = -1;
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public MergeCursorWithUniqueId(List<Cursor> cursors) {
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public MergeCursorWithUniqueId(Cursor[] cursors) {
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super(cursors);
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if (cursors.size() > MAX_CURSORS) {
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if (cursors.length > MAX_CURSORS) {
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throw new IllegalArgumentException("This class only supports up to " +
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MAX_CURSORS + " cursors");
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}
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