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/*
* Copyright (C) 2013 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.content.Context;
import android.database.Cursor;
import android.net.Uri;
import com.android.emailcommon.internet.MimeMessage;
import com.android.emailcommon.mail.MessagingException;
import com.android.mail.browse.MessageCursor.ConversationController;
import com.android.mail.content.CursorCreator;
import com.android.mail.providers.Attachment;
import com.android.mail.providers.Conversation;
import com.android.mail.providers.Message;
import com.android.mail.ui.ConversationUpdater;
import com.google.common.base.Objects;
/**
* A message created as part of a conversation view. Sometimes, like during star/unstar, it's
* handy to have the owning {@link com.android.mail.providers.Conversation} for context.
*
* <p>This class must remain separate from the {@link MessageCursor} from whence it came,
* because cursors can be closed by their Loaders at any time. The
* {@link ConversationController} intermediate is used to obtain the currently opened cursor.
*
* <p>(N.B. This is a {@link android.os.Parcelable}, so try not to add non-transient fields here.
* Parcelable state belongs either in {@link com.android.mail.providers.Message} or
* {@link com.android.mail.ui.ConversationViewState.MessageViewState}. The
* assumption is that this class never needs the state of its extra context saved.)
*/
public final class ConversationMessage extends Message {
private transient ConversationController mController;
private ConversationMessage(Cursor cursor) {
super(cursor);
}
public ConversationMessage(Context context, MimeMessage mimeMessage, Uri emlFileUri)
throws MessagingException {
super(context, mimeMessage, emlFileUri);
}
public void setController(ConversationController controller) {
mController = controller;
}
public Conversation getConversation() {
return mController != null ? mController.getConversation() : null;
}
/**
* Returns a hash code based on this message's identity, contents and current state.
* This is a separate method from hashCode() to allow for an instance of this class to be
* a functional key in a hash-based data structure.
*
*/
public int getStateHashCode() {
return Objects.hashCode(uri, read, starred, getAttachmentsStateHashCode());
}
private int getAttachmentsStateHashCode() {
int hash = 0;
for (Attachment a : getAttachments()) {
final Uri uri = a.getIdentifierUri();
hash += (uri != null ? uri.hashCode() : 0);
}
return hash;
}
public boolean isConversationStarred() {
final MessageCursor c = mController.getMessageCursor();
return c != null && c.isConversationStarred();
}
public void star(boolean newStarred) {
final ConversationUpdater listController = mController.getListController();
if (listController != null) {
listController.starMessage(this, newStarred);
}
}
/**
* Public object that knows how to construct Messages given Cursors.
*/
public static final CursorCreator<ConversationMessage> FACTORY =
new CursorCreator<ConversationMessage>() {
@Override
public ConversationMessage createFromCursor(Cursor c) {
return new ConversationMessage(c);
}
@Override
public String toString() {
return "ConversationMessage CursorCreator";
}
};
}
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