248 lines
8.9 KiB
Java
248 lines
8.9 KiB
Java
/*
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* Copyright (C) 2010 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.android.email.activity;
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import com.android.email.Email;
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import com.android.email.ResourceHelper;
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import com.android.email.data.ThrottlingCursorLoader;
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import com.android.emailcommon.Logging;
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import com.android.emailcommon.provider.EmailContent;
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import com.android.emailcommon.provider.EmailContent.Message;
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import com.android.emailcommon.provider.EmailContent.MessageColumns;
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import com.android.emailcommon.utility.TextUtilities;
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import com.android.emailcommon.utility.Utility;
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import android.content.Context;
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import android.content.Loader;
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import android.database.Cursor;
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import android.os.Bundle;
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import android.util.Log;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.CursorAdapter;
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import java.util.HashSet;
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import java.util.Set;
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/**
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* This class implements the adapter for displaying messages based on cursors.
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*/
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/* package */ class MessagesAdapter extends CursorAdapter {
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private static final String STATE_CHECKED_ITEMS =
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"com.android.email.activity.MessagesAdapter.checkedItems";
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/* package */ static final String[] MESSAGE_PROJECTION = new String[] {
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EmailContent.RECORD_ID, MessageColumns.MAILBOX_KEY, MessageColumns.ACCOUNT_KEY,
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MessageColumns.DISPLAY_NAME, MessageColumns.SUBJECT, MessageColumns.TIMESTAMP,
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MessageColumns.FLAG_READ, MessageColumns.FLAG_FAVORITE, MessageColumns.FLAG_ATTACHMENT,
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MessageColumns.FLAGS, MessageColumns.SNIPPET
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};
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public static final int COLUMN_ID = 0;
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public static final int COLUMN_MAILBOX_KEY = 1;
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public static final int COLUMN_ACCOUNT_KEY = 2;
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public static final int COLUMN_DISPLAY_NAME = 3;
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public static final int COLUMN_SUBJECT = 4;
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public static final int COLUMN_DATE = 5;
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public static final int COLUMN_READ = 6;
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public static final int COLUMN_FAVORITE = 7;
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public static final int COLUMN_ATTACHMENTS = 8;
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public static final int COLUMN_FLAGS = 9;
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public static final int COLUMN_SNIPPET = 10;
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private final ResourceHelper mResourceHelper;
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/** If true, show color chips. */
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private boolean mShowColorChips;
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/** If not null, the query represented by this group of messages */
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private String mQuery;
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/**
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* Set of seleced message IDs.
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*/
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private final HashSet<Long> mSelectedSet = new HashSet<Long>();
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/**
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* Callback from MessageListAdapter. All methods are called on the UI thread.
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*/
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public interface Callback {
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/** Called when the use starts/unstars a message */
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void onAdapterFavoriteChanged(MessageListItem itemView, boolean newFavorite);
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/** Called when the user selects/unselects a message */
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void onAdapterSelectedChanged(MessageListItem itemView, boolean newSelected,
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int mSelectedCount);
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}
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private final Callback mCallback;
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public MessagesAdapter(Context context, Callback callback) {
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super(context.getApplicationContext(), null, 0 /* no auto requery */);
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mResourceHelper = ResourceHelper.getInstance(context);
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mCallback = callback;
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}
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public void onSaveInstanceState(Bundle outState) {
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Set<Long> checkedset = getSelectedSet();
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long[] checkedarray = new long[checkedset.size()];
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int i = 0;
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for (Long l : checkedset) {
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checkedarray[i] = l;
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i++;
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}
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outState.putLongArray(STATE_CHECKED_ITEMS, checkedarray);
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}
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public void loadState(Bundle savedInstanceState) {
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Set<Long> checkedset = getSelectedSet();
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for (long l: savedInstanceState.getLongArray(STATE_CHECKED_ITEMS)) {
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checkedset.add(l);
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}
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}
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/**
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* Set true for combined mailboxes.
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*/
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public void setShowColorChips(boolean show) {
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mShowColorChips = show;
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}
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public void setQuery(String query) {
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mQuery = query;
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}
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public Set<Long> getSelectedSet() {
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return mSelectedSet;
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}
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public boolean isSelected(MessageListItem itemView) {
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return mSelectedSet.contains(itemView.mMessageId);
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}
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@Override
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public void bindView(View view, Context context, Cursor cursor) {
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// Reset the view (in case it was recycled) and prepare for binding
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MessageListItem itemView = (MessageListItem) view;
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itemView.bindViewInit(this);
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// Load the public fields in the view (for later use)
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itemView.mMessageId = cursor.getLong(COLUMN_ID);
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itemView.mMailboxId = cursor.getLong(COLUMN_MAILBOX_KEY);
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final long accountId = cursor.getLong(COLUMN_ACCOUNT_KEY);
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itemView.mAccountId = accountId;
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itemView.mRead = cursor.getInt(COLUMN_READ) != 0;
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itemView.mIsFavorite = cursor.getInt(COLUMN_FAVORITE) != 0;
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itemView.mHasInvite =
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(cursor.getInt(COLUMN_FLAGS) & Message.FLAG_INCOMING_MEETING_INVITE) != 0;
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itemView.mHasAttachment = cursor.getInt(COLUMN_ATTACHMENTS) != 0;
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itemView.mTimestamp = cursor.getLong(COLUMN_DATE);
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itemView.mSender = cursor.getString(COLUMN_DISPLAY_NAME);
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itemView.mSnippet = cursor.getString(COLUMN_SNIPPET);
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itemView.mSubject = cursor.getString(COLUMN_SUBJECT);
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itemView.mSnippetLineCount = MessageListItem.NEEDS_LAYOUT;
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itemView.mColorChipPaint =
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mShowColorChips ? mResourceHelper.getAccountColorPaint(accountId) : null;
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if (mQuery != null && itemView.mSnippet != null) {
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itemView.mSnippet =
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TextUtilities.highlightTermsInText(cursor.getString(COLUMN_SNIPPET), mQuery);
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}
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}
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@Override
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public View newView(Context context, Cursor cursor, ViewGroup parent) {
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//return mInflater.inflate(R.layout.message_list_item, parent, false);
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MessageListItem item = new MessageListItem(context);
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item.setVisibility(View.VISIBLE);
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return item;
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}
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public void toggleSelected(MessageListItem itemView) {
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updateSelected(itemView, !isSelected(itemView));
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}
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/**
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* This is used as a callback from the list items, to set the selected state
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*
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* <p>Must be called on the UI thread.
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*
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* @param itemView the item being changed
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* @param newSelected the new value of the selected flag (checkbox state)
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*/
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private void updateSelected(MessageListItem itemView, boolean newSelected) {
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if (newSelected) {
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mSelectedSet.add(itemView.mMessageId);
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} else {
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mSelectedSet.remove(itemView.mMessageId);
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}
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if (mCallback != null) {
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mCallback.onAdapterSelectedChanged(itemView, newSelected, mSelectedSet.size());
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}
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}
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/**
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* This is used as a callback from the list items, to set the favorite state
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*
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* <p>Must be called on the UI thread.
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*
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* @param itemView the item being changed
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* @param newFavorite the new value of the favorite flag (star state)
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*/
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public void updateFavorite(MessageListItem itemView, boolean newFavorite) {
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changeFavoriteIcon(itemView, newFavorite);
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if (mCallback != null) {
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mCallback.onAdapterFavoriteChanged(itemView, newFavorite);
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}
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}
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private void changeFavoriteIcon(MessageListItem view, boolean isFavorite) {
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view.invalidate();
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}
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public static Loader<Cursor> createLoader(Context context, long mailboxId) {
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if (Email.DEBUG_LIFECYCLE && Email.DEBUG) {
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Log.d(Logging.LOG_TAG, "MessagesAdapter createLoader mailboxId=" + mailboxId);
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}
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return new MessagesCursorLoader(context, mailboxId);
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}
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static private class MessagesCursorLoader extends ThrottlingCursorLoader {
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private final Context mContext;
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private final long mMailboxId;
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public MessagesCursorLoader(Context context, long mailboxId) {
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// Initialize with no where clause. We'll set it later.
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super(context, EmailContent.Message.CONTENT_URI,
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MESSAGE_PROJECTION, null, null,
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EmailContent.MessageColumns.TIMESTAMP + " DESC");
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mContext = context;
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mMailboxId = mailboxId;
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}
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@Override
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public Cursor loadInBackground() {
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// Determine the where clause. (Can't do this on the UI thread.)
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setSelection(Utility.buildMailboxIdSelection(mContext, mMailboxId));
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// Then do a query.
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return Utility.CloseTraceCursorWrapper.get(super.loadInBackground());
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}
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}
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}
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