| /* |
| * 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.ui; |
| |
| import android.app.Activity; |
| import android.app.ListFragment; |
| import android.content.Context; |
| import android.content.res.Resources; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.Parcelable; |
| import android.view.LayoutInflater; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.ViewGroup.MarginLayoutParams; |
| import android.widget.AdapterView; |
| import android.widget.AdapterView.OnItemLongClickListener; |
| import android.widget.ListView; |
| import android.widget.TextView; |
| |
| import com.android.mail.ConversationListContext; |
| import com.android.mail.R; |
| import com.android.mail.browse.ConversationCursor; |
| import com.android.mail.browse.ConversationItemView; |
| import com.android.mail.browse.ConversationListFooterView; |
| import com.android.mail.providers.Account; |
| import com.android.mail.providers.Conversation; |
| import com.android.mail.providers.Folder; |
| import com.android.mail.providers.Settings; |
| import com.android.mail.providers.UIProvider; |
| import com.android.mail.ui.SwipeableListView.SwipeCompleteListener; |
| import com.android.mail.ui.ViewMode.ModeChangeListener; |
| import com.android.mail.utils.LogUtils; |
| import com.android.mail.utils.Utils; |
| |
| import java.util.Collection; |
| |
| /** |
| * The conversation list UI component. |
| */ |
| public final class ConversationListFragment extends ListFragment implements |
| OnItemLongClickListener, ModeChangeListener, SwipeCompleteListener, |
| Settings.ChangeListener { |
| // Keys used to pass data to {@link ConversationListFragment}. |
| private static final String CONVERSATION_LIST_KEY = "conversation-list"; |
| // Key used to keep track of the scroll state of the list. |
| private static final String LIST_STATE_KEY = "list-state"; |
| private static final String LOG_TAG = new LogUtils().getLogTag(); |
| |
| // True if we are on a tablet device |
| private static boolean mTabletDevice; |
| |
| /** |
| * Frequency of update of timestamps. Initialized in {@link #onCreate(Bundle)} and final |
| * afterwards. |
| */ |
| private static int TIMESTAMP_UPDATE_INTERVAL = 0; |
| |
| private ControllableActivity mActivity; |
| |
| // Control state. |
| private ConversationListCallbacks mCallbacks; |
| private View mEmptyView; |
| |
| private final Handler mHandler = new Handler(); |
| // True if the view is in CAB (Contextual Action Bar: some conversations are selected) mode |
| private boolean mIsCabMode; |
| // List save state. |
| private Parcelable mListSavedState; |
| |
| // The internal view objects. |
| private SwipeableListView mListView; |
| |
| private TextView mSearchResultCountTextView; |
| private TextView mSearchStatusTextView; |
| |
| private View mSearchStatusView; |
| |
| /** |
| * Current Account being viewed |
| */ |
| private Account mAccount; |
| /** |
| * Current folder being viewed. |
| */ |
| private Folder mFolder; |
| |
| /** |
| * A simple method to update the timestamps of conversations periodically. |
| */ |
| private Runnable mUpdateTimestampsRunnable = null; |
| |
| private ConversationListContext mViewContext; |
| |
| private AnimatedAdapter mListAdapter; |
| |
| private ConversationListFooterView mFooterView; |
| private int mSwipeAction; |
| |
| /** |
| * Constructor needs to be public to handle orientation changes and activity lifecycle events. |
| */ |
| public ConversationListFragment() { |
| super(); |
| } |
| |
| /** |
| * Creates a new instance of {@link ConversationListFragment}, initialized to display |
| * conversation list context. |
| */ |
| public static ConversationListFragment newInstance(ConversationListContext viewContext) { |
| ConversationListFragment fragment = new ConversationListFragment(); |
| Bundle args = new Bundle(); |
| args.putBundle(CONVERSATION_LIST_KEY, viewContext.toBundle()); |
| fragment.setArguments(args); |
| return fragment; |
| } |
| |
| /** |
| * Show the header if the current conversation list is showing search results. |
| */ |
| void configureSearchResultHeader() { |
| if (mActivity == null) { |
| return; |
| } |
| // Only show the header if the context is for a search result |
| final Resources res = getResources(); |
| final boolean showHeader = isSearchResult(); |
| // TODO(viki): This code contains intimate understanding of the view. Much of this logic |
| // needs to reside in a separate class that handles the text view in isolation. Then, |
| // that logic can be reused in other fragments. |
| if (showHeader) { |
| mSearchStatusTextView.setText(res.getString(R.string.search_results_searching_header)); |
| // Initially reset the count |
| mSearchResultCountTextView.setText(""); |
| } |
| mSearchStatusView.setVisibility(showHeader ? View.VISIBLE : View.GONE); |
| int marginTop = showHeader ? (int) res.getDimension(R.dimen.notification_view_height) : 0; |
| MarginLayoutParams layoutParams = (MarginLayoutParams) mListView.getLayoutParams(); |
| layoutParams.topMargin = marginTop; |
| mListView.setLayoutParams(layoutParams); |
| } |
| |
| /** |
| * Show the header if the current conversation list is showing search results. |
| */ |
| private void updateSearchResultHeader(int count) { |
| // Only show the header if the context is for a search result |
| final Resources res = getResources(); |
| final boolean showHeader = isSearchResult(); |
| if (showHeader) { |
| mSearchStatusTextView.setText(res.getString(R.string.search_results_header)); |
| mSearchResultCountTextView |
| .setText(res.getString(R.string.search_results_loaded, count)); |
| } |
| } |
| |
| /** |
| * Initializes all internal state for a rendering. |
| */ |
| private void initializeUiForFirstDisplay() { |
| // TODO(mindyp): find some way to make the notification container more re-usable. |
| // TODO(viki): refactor according to comment in configureSearchResultHandler() |
| mSearchStatusView = mActivity.findViewById(R.id.search_status_view); |
| mSearchStatusTextView = (TextView) mActivity.findViewById(R.id.search_status_text_view); |
| mSearchResultCountTextView = (TextView) mActivity.findViewById( |
| R.id.search_result_count_view); |
| } |
| |
| private boolean isSearchResult() { |
| return mViewContext != null && mViewContext.isSearchResult(); |
| } |
| |
| @Override |
| public void onActivityCreated(Bundle savedInstanceState) { |
| super.onActivityCreated(savedInstanceState); |
| // Strictly speaking, we get back an android.app.Activity from getActivity. However, the |
| // only activity creating a ConversationListContext is a MailActivity which is of type |
| // ControllableActivity, so this cast should be safe. If this cast fails, some other |
| // activity is creating ConversationListFragments. This activity must be of type |
| // ControllableActivity. |
| final Activity activity = getActivity(); |
| if (! (activity instanceof ControllableActivity)) { |
| LogUtils.e(LOG_TAG, "ConversationListFragment expects only a ControllableActivity to" + |
| "create it. Cannot proceed."); |
| } |
| mActivity = (ControllableActivity) activity; |
| mCallbacks = mActivity.getListHandler(); |
| |
| mListAdapter = new AnimatedAdapter(mActivity.getApplicationContext(), -1, |
| getConversationListCursor(), mActivity.getSelectedSet(), mAccount, |
| mActivity.getSettings(), mActivity.getViewMode(), mListView, |
| mActivity.getDragListener()); |
| mFooterView = (ConversationListFooterView) LayoutInflater.from( |
| mActivity.getActivityContext()).inflate(R.layout.conversation_list_footer_view, |
| null); |
| mListAdapter.addFooter(mFooterView); |
| mListView.setAdapter(mListAdapter); |
| mListView.setSelectionSet(mActivity.getSelectedSet()); |
| mListAdapter.hideFooter(); |
| mActivity.setViewModeListener(this); |
| mTabletDevice = Utils.useTabletUI(mActivity.getApplicationContext()); |
| initializeUiForFirstDisplay(); |
| configureSearchResultHeader(); |
| // The onViewModeChanged callback doesn't get called when the mode object is created, so |
| // force setting the mode manually this time around. |
| onViewModeChanged(mActivity.getViewMode().getMode()); |
| |
| // Restore the list state |
| if (mListSavedState != null) { |
| mListView.onRestoreInstanceState(mListSavedState); |
| |
| // TODO: find a better way to unset the selected item when restoring |
| mListView.clearChoices(); |
| } |
| |
| if (mActivity.isFinishing()) { |
| // Activity is finishing, just bail. |
| return; |
| } |
| |
| // Show list and start loading list. |
| showList(); |
| } |
| |
| public AnimatedAdapter getAnimatedAdapter() { |
| return mListAdapter; |
| } |
| |
| @Override |
| public void onCreate(Bundle savedState) { |
| super.onCreate(savedState); |
| |
| // Initialize fragment constants from resources |
| final Resources res = getResources(); |
| TIMESTAMP_UPDATE_INTERVAL = res.getInteger(R.integer.timestamp_update_interval); |
| mUpdateTimestampsRunnable = new Runnable(){ |
| @Override |
| public void run() { |
| mListView.invalidateViews(); |
| mHandler.postDelayed(mUpdateTimestampsRunnable, TIMESTAMP_UPDATE_INTERVAL); |
| } |
| }; |
| |
| // Get the context from the arguments |
| final Bundle args = getArguments(); |
| mViewContext = ConversationListContext.forBundle(args.getBundle(CONVERSATION_LIST_KEY)); |
| mAccount = mViewContext.account; |
| // TODO(mindyp): do we want this as a setting? |
| mSwipeAction = mAccount.supportsCapability(UIProvider.AccountCapabilities.ARCHIVE) ? |
| R.id.archive : R.id.delete; |
| if (savedState != null) { |
| mListSavedState = savedState.getParcelable(LIST_STATE_KEY); |
| } |
| setRetainInstance(true); |
| } |
| |
| @Override |
| public View onCreateView(LayoutInflater inflater, |
| ViewGroup container, Bundle savedInstanceState) { |
| View rootView = inflater.inflate(R.layout.conversation_list, null); |
| mEmptyView = rootView.findViewById(R.id.empty_view); |
| mListView = (SwipeableListView) rootView.findViewById(android.R.id.list); |
| mListView.setHeaderDividersEnabled(false); |
| mListView.setChoiceMode(ListView.CHOICE_MODE_SINGLE); |
| mListView.setOnItemLongClickListener(this); |
| mListView.enableSwipe(mAccount.supportsCapability(UIProvider.AccountCapabilities.UNDO)); |
| mListView.setSwipeAction(mAccount |
| .supportsCapability(UIProvider.AccountCapabilities.ARCHIVE) ? R.id.archive |
| : R.id.delete); |
| // Note - we manually save/restore the listview state. |
| mListView.setSaveEnabled(false); |
| |
| ConversationCursor conversationListCursor = getConversationListCursor(); |
| // Belt and suspenders here; make sure we do any necessary sync of the ConversationCursor |
| if (conversationListCursor != null && conversationListCursor.isRefreshReady()) { |
| conversationListCursor.sync(); |
| } |
| return rootView; |
| } |
| |
| @Override |
| public void onDestroyView() { |
| mListSavedState = mListView.onSaveInstanceState(); |
| |
| // Set a null cursor in the dapter, and clear the list's adapter |
| mListAdapter.swapCursor(null); |
| mListView.setAdapter(null); |
| |
| mActivity.unsetViewModeListener(this); |
| if (!mActivity.isChangingConfigurations()) { |
| mActivity.getLoaderManager().destroyLoader(mViewContext.hashCode()); |
| } |
| commitLeaveBehindItems(); |
| super.onDestroyView(); |
| } |
| |
| @Override |
| public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { |
| // Ignore anything that is not a conversation item. Could be a footer. |
| if (!(view instanceof ConversationItemView)) { |
| return true; |
| } |
| // Long click is for adding conversations to a selection. Add conversation here. |
| |
| // TODO(viki): True for now. We need to look at settings and perform a different action if |
| // check boxes are not visible. |
| final boolean isCheckBoxVisible = true; |
| if (isCheckBoxVisible && mTabletDevice && mIsCabMode) { |
| viewConversation(position); |
| return true; |
| } |
| assert (view instanceof ConversationItemView); |
| ConversationItemView item = (ConversationItemView) view; |
| item.getConversation(); |
| // TODO(mindyp) handle drag mode, long press. |
| // Handle drag mode if allowed, otherwise toggle selection. |
| // if (!mViewMode.getMode() == ViewMode.CONVERSATION_LIST || !mTabletDevice) { |
| // Add this conversation to the selected set. |
| // final Conversation conversation = item.getConversation(); |
| // mSelectedSet.toggle(conversation); |
| item.toggleCheckMark(); |
| // Verify that the checkbox is in sync with the selection set. |
| // assert (item.isSelected() == mSelectedSet.contains(conversation)); |
| return true; |
| } |
| |
| @Override |
| public void onListItemClick(ListView l, View view, int position, long id) { |
| // Ignore anything that is not a conversation item. Could be a footer. |
| if (!(view instanceof ConversationItemView)) { |
| return; |
| } |
| viewConversation(position); |
| } |
| |
| @Override |
| public void onPause() { |
| super.onPause(); |
| } |
| |
| @Override |
| public void onSaveInstanceState(Bundle outState) { |
| super.onSaveInstanceState(outState); |
| if (mListView != null) { |
| outState.putParcelable(LIST_STATE_KEY, mListView.onSaveInstanceState()); |
| } |
| } |
| |
| @Override |
| public void onStart() { |
| super.onStart(); |
| mHandler.postDelayed(mUpdateTimestampsRunnable, TIMESTAMP_UPDATE_INTERVAL); |
| } |
| |
| @Override |
| public void onStop() { |
| super.onStop(); |
| mHandler.removeCallbacks(mUpdateTimestampsRunnable); |
| } |
| |
| @Override |
| public void onViewModeChanged(int newMode) { |
| // Change the divider based on view mode. |
| if (mTabletDevice) { |
| if (newMode == ViewMode.CONVERSATION) { |
| mListView.setBackgroundResource(R.drawable.panel_conversation_leftstroke); |
| } else if (newMode == ViewMode.CONVERSATION_LIST) { |
| // There are no selected conversations when in conversation list mode. |
| mListView.clearChoices(); |
| mListView.setBackgroundDrawable(null); |
| } |
| } else { |
| mListView.setBackgroundDrawable(null); |
| } |
| } |
| /** |
| * Handles a request to show a new conversation list, either from a search query or for viewing |
| * a folder. This will initiate a data load, and hence must be called on the UI thread. |
| */ |
| private void showList() { |
| mListView.setEmptyView(null); |
| onFolderUpdated(mViewContext.folder); |
| } |
| |
| /** |
| * View the message at the given position. |
| * @param position |
| */ |
| protected void viewConversation(int position) { |
| LogUtils.d(LOG_TAG, "ConversationListFragment.viewConversation(%d)", position); |
| setSelected(position); |
| final ConversationCursor cursor = getConversationListCursor(); |
| if (cursor != null && cursor.moveToPosition(position)) { |
| final Conversation conv = new Conversation(cursor); |
| conv.position = position; |
| mCallbacks.onConversationSelected(conv); |
| } |
| } |
| |
| /** |
| * Sets the selected position (the highlighted conversation) to the position provided here. |
| * @param position |
| */ |
| protected final void setSelected(int position) { |
| getListView().setItemChecked(position, true); |
| } |
| |
| private ConversationCursor getConversationListCursor() { |
| return mCallbacks != null ? mCallbacks.getConversationListCursor() : null; |
| } |
| |
| /** |
| * Request a refresh of the list. No sync is carried out and none is promised. |
| */ |
| public void requestListRefresh() { |
| mListAdapter.notifyDataSetChanged(); |
| } |
| |
| /** |
| * Change the UI to delete the conversations provided and then call the |
| * {@link DestructiveAction} provided here <b>after</b> the UI has been updated. |
| * @param conversations |
| * @param action |
| */ |
| public void requestDelete(Collection<Conversation> conversations, DestructiveAction action) { |
| for (Conversation conv : conversations) { |
| conv.localDeleteOnUpdate = true; |
| } |
| // Delete the local delete items (all for now) and when done, |
| // update... |
| mListAdapter.delete(conversations, action); |
| } |
| |
| public void onFolderUpdated(Folder folder) { |
| mFolder = folder; |
| if (mFolder == null) { |
| return; |
| } |
| mListAdapter.setFolder(mFolder); |
| mFooterView.updateStatus(mFolder); |
| if (mFolder.isSyncInProgress()) { |
| mListAdapter.showFooter(); |
| } else if (!mFolder.isSyncInProgress() |
| && mFolder.lastSyncResult == UIProvider.LastSyncResult.SUCCESS) { |
| // Check the status of the folder to see if we are done loading. |
| updateSearchResultHeader(mFolder != null ? mFolder.totalCount : 0); |
| if (mFolder.totalCount == 0) { |
| mListView.setEmptyView(mEmptyView); |
| } else { |
| if (folder.loadMoreUri == null) { |
| mListAdapter.hideFooter(); |
| } else { |
| if ((mListAdapter.getCursor() != null) && |
| (folder.totalCount > mListAdapter.getCount())) { |
| mListAdapter.showFooter(); |
| } else { |
| mListAdapter.hideFooter(); |
| } |
| } |
| } |
| } |
| } |
| |
| @Override |
| public void onSwipeComplete(Collection<Conversation> conversations) { |
| Context context = getActivity().getApplicationContext(); |
| ConversationCursor cc = getConversationListCursor(); |
| switch (mSwipeAction) { |
| case R.id.archive: |
| cc.archive(context, conversations); |
| break; |
| case R.id.delete: |
| cc.delete(context, conversations); |
| break; |
| } |
| mListAdapter.notifyDataSetChanged(); |
| if (!mActivity.getSelectedSet().isEmpty()) { |
| mActivity.getSelectedSet().clear(); |
| } |
| mActivity.onUndoAvailable(new UndoOperation(conversations.size(), mSwipeAction)); |
| } |
| |
| public void onCursorUpdated() { |
| if (mListAdapter != null) { |
| mListAdapter.swapCursor(mCallbacks.getConversationListCursor()); |
| } |
| onFolderUpdated(mFolder); |
| } |
| |
| public void commitLeaveBehindItems() { |
| if (mListAdapter != null) { |
| mListAdapter.commitLeaveBehindItems(); |
| |
| } |
| } |
| |
| @Override |
| public void onSettingsChanged(Settings updatedSettings) { |
| if (mListAdapter != null) { |
| mListAdapter.onSettingsChanged(updatedSettings); |
| } |
| } |
| } |