conversations-classic/src/main/java/eu/siacs/conversations/ui/ConversationsOverviewFragment.java

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/*
* Copyright (c) 2018, Daniel Gultsch All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package eu.siacs.conversations.ui;
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import android.app.Activity;
import android.app.Fragment;
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import android.databinding.DataBindingUtil;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;
import de.timroes.android.listview.EnhancedListView;
import eu.siacs.conversations.Config;
import eu.siacs.conversations.R;
import eu.siacs.conversations.databinding.FragmentConversationsOverviewBinding;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.ui.adapter.ConversationAdapter;
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import eu.siacs.conversations.ui.interfaces.OnConversationArchived;
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import eu.siacs.conversations.ui.interfaces.OnConversationSelected;
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import eu.siacs.conversations.ui.util.PendingItem;
import eu.siacs.conversations.ui.util.ScrollState;
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public class ConversationsOverviewFragment extends XmppFragment implements EnhancedListView.OnDismissCallback {
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private static final String STATE_SCROLL_POSITION = ConversationsOverviewFragment.class.getName()+".scroll_state";
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private final List<Conversation> conversations = new ArrayList<>();
private final PendingItem<Conversation> swipedConversation = new PendingItem<>();
private final PendingItem<ScrollState> pendingScrollState = new PendingItem<>();
private FragmentConversationsOverviewBinding binding;
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private ConversationAdapter conversationsAdapter;
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private XmppActivity activity;
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public static Conversation getSuggestion(Activity activity) {
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final Conversation exception;
Fragment fragment = activity.getFragmentManager().findFragmentById(R.id.main_fragment);
if (fragment != null && fragment instanceof ConversationsOverviewFragment) {
exception = ((ConversationsOverviewFragment) fragment).swipedConversation.peek();
} else {
exception = null;
}
return getSuggestion(activity, exception);
}
public static Conversation getSuggestion(Activity activity, Conversation exception) {
Fragment fragment = activity.getFragmentManager().findFragmentById(R.id.main_fragment);
if (fragment != null && fragment instanceof ConversationsOverviewFragment) {
List<Conversation> conversations = ((ConversationsOverviewFragment) fragment).conversations;
if (conversations.size() > 0) {
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Conversation suggestion = conversations.get(0);
if (suggestion == exception) {
if (conversations.size() > 1) {
return conversations.get(1);
}
} else {
return suggestion;
}
}
}
return null;
}
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@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if (savedInstanceState == null) {
return;
}
pendingScrollState.push(savedInstanceState.getParcelable(STATE_SCROLL_POSITION));
}
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@Override
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public void onAttach(Activity activity) {
super.onAttach(activity);
if (activity instanceof XmppActivity) {
this.activity = (XmppActivity) activity;
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} else {
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throw new IllegalStateException("Trying to attach fragment to activity that is not an XmppActivity");
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}
}
@Override
public void onDetach() {
super.onDetach();
this.activity = null;
}
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@Override
public View onCreateView(final LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.d(Config.LOGTAG, "onCreateView");
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this.binding = DataBindingUtil.inflate(inflater, R.layout.fragment_conversations_overview, container, false);
this.binding.fab.setOnClickListener((view) -> StartConversationActivity.launch(getActivity()));
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this.conversationsAdapter = new ConversationAdapter(this.activity, this.conversations);
this.binding.list.setAdapter(this.conversationsAdapter);
this.binding.list.setOnItemClickListener((parent, view, position, id) -> {
Conversation conversation = this.conversations.get(position);
if (activity instanceof OnConversationSelected) {
((OnConversationSelected) activity).onConversationSelected(conversation);
} else {
Log.w(ConversationsOverviewFragment.class.getCanonicalName(), "Activity does not implement OnConversationSelected");
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}
});
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this.binding.list.setDismissCallback(this);
this.binding.list.enableSwipeToDismiss();
this.binding.list.setSwipeDirection(EnhancedListView.SwipeDirection.BOTH);
this.binding.list.setSwipingLayout(R.id.swipeable_item);
this.binding.list.setUndoStyle(EnhancedListView.UndoStyle.SINGLE_POPUP);
this.binding.list.setUndoHideDelay(5000);
this.binding.list.setRequireTouchBeforeDismiss(false);
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return binding.getRoot();
}
@Override
void onBackendConnected() {
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refresh();
}
@Override
public void onSaveInstanceState(Bundle bundle) {
super.onSaveInstanceState(bundle);
bundle.putParcelable(STATE_SCROLL_POSITION,getScrollState());
}
private ScrollState getScrollState() {
int position = this.binding.list.getFirstVisiblePosition();
final View view = this.binding.list.getChildAt(0);
if (view != null) {
return new ScrollState(position,view.getTop());
} else {
return new ScrollState(position, 0);
}
}
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@Override
public void onStart() {
super.onStart();
Log.d(Config.LOGTAG, "ConversationsOverviewFragment.onStart()");
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if (activity.xmppConnectionService != null) {
refresh();
}
}
@Override
public void onResume() {
super.onResume();
Log.d(Config.LOGTAG, "ConversationsOverviewFragment.onResume()");
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}
@Override
void refresh() {
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if (this.binding == null || this.activity == null) {
Log.d(Config.LOGTAG,"ConversationsOverviewFragment.refresh() skipped updated because view binding or activity was null");
return;
}
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this.activity.xmppConnectionService.populateWithOrderedConversations(this.conversations);
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Conversation removed = this.swipedConversation.peek();
if (removed != null) {
if (removed.isRead()) {
this.conversations.remove(removed);
} else {
this.binding.list.discardUndo(); //will be ignored during discard when conversation is unRead
}
}
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this.conversationsAdapter.notifyDataSetChanged();
ScrollState scrollState = pendingScrollState.pop();
if (scrollState != null) {
setScrollPosition(scrollState);
}
}
private void setScrollPosition(ScrollState scrollPosition) {
if (scrollPosition != null) {
this.binding.list.setSelectionFromTop(scrollPosition.position, scrollPosition.offset);
}
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}
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@Override
public EnhancedListView.Undoable onDismiss(EnhancedListView listView, int position) {
try {
swipedConversation.push(this.conversationsAdapter.getItem(position));
} catch (IndexOutOfBoundsException e) {
return null;
}
this.conversationsAdapter.remove(swipedConversation.peek());
this.activity.xmppConnectionService.markRead(swipedConversation.peek());
if (position == 0 && this.conversationsAdapter.getCount() == 0) {
final Conversation c = swipedConversation.pop();
activity.xmppConnectionService.archiveConversation(c);
if (activity instanceof OnConversationArchived) {
((OnConversationArchived) activity).onConversationArchived(c);
}
return null;
}
final boolean formerlySelected = ConversationFragment.getConversation(getActivity()) == swipedConversation.peek();
if (activity instanceof OnConversationArchived) {
((OnConversationArchived) activity).onConversationArchived(swipedConversation.peek());
}
return new EnhancedListView.Undoable() {
@Override
public void undo() {
Conversation c = swipedConversation.pop();
conversationsAdapter.insert(c, position);
if (formerlySelected) {
if (activity instanceof OnConversationSelected) {
((OnConversationSelected) activity).onConversationSelected(c);
}
}
if (position > listView.getLastVisiblePosition()) {
listView.smoothScrollToPosition(position);
}
}
@Override
public void discard() {
Conversation c = swipedConversation.pop();
if (!c.isRead() && c.getMode() == Conversation.MODE_SINGLE) {
return;
}
activity.xmppConnectionService.archiveConversation(c);
}
@Override
public String getTitle() {
if (swipedConversation.peek().getMode() == Conversation.MODE_MULTI) {
return getResources().getString(R.string.title_undo_swipe_out_muc);
} else {
return getResources().getString(R.string.title_undo_swipe_out_conversation);
}
}
};
}
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}