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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.home;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.mozilla.gecko.AboutPages;
import org.mozilla.gecko.EventDispatcher;
import org.mozilla.gecko.GeckoApp;
import org.mozilla.gecko.GeckoAppShell;
import org.mozilla.gecko.GeckoProfile;
import org.mozilla.gecko.R;
import org.mozilla.gecko.SessionParser;
import org.mozilla.gecko.home.CombinedHistoryAdapter.RecentTabsUpdateHandler;
import org.mozilla.gecko.home.CombinedHistoryPanel.PanelStateUpdateHandler;
import org.mozilla.gecko.util.EventCallback;
import org.mozilla.gecko.util.NativeEventListener;
import org.mozilla.gecko.util.NativeJSObject;
import org.mozilla.gecko.util.ThreadUtils;
import java.util.ArrayList;
import java.util.List;
import static org.mozilla.gecko.home.CombinedHistoryItem.ItemType;
import static org.mozilla.gecko.home.CombinedHistoryPanel.OnPanelLevelChangeListener.PanelLevel.CHILD_RECENT_TABS;
public class RecentTabsAdapter extends RecyclerView.Adapter<CombinedHistoryItem>
implements CombinedHistoryRecyclerView.AdapterContextMenuBuilder, NativeEventListener {
private static final String LOGTAG = "GeckoRecentTabsAdapter";
private static final int NAVIGATION_BACK_BUTTON_INDEX = 0;
private static final String TELEMETRY_EXTRA_LAST_TIME = "recent_tabs_last_time";
private static final String TELEMETRY_EXTRA_RECENTLY_CLOSED = "recent_closed_tabs";
private static final String TELEMETRY_EXTRA_MIXED = "recent_tabs_mixed";
// Recently closed tabs from Gecko.
private ClosedTab[] recentlyClosedTabs;
private boolean recentlyClosedTabsReceived = false;
// "Tabs from last time".
private ClosedTab[] lastSessionTabs;
public static final class ClosedTab {
public final String url;
public final String title;
public final String data;
public ClosedTab(String url, String title, String data) {
this.url = url;
this.title = title;
this.data = data;
}
}
private final Context context;
private final RecentTabsUpdateHandler recentTabsUpdateHandler;
private final PanelStateUpdateHandler panelStateUpdateHandler;
public RecentTabsAdapter(Context context,
RecentTabsUpdateHandler recentTabsUpdateHandler,
PanelStateUpdateHandler panelStateUpdateHandler) {
this.context = context;
this.recentTabsUpdateHandler = recentTabsUpdateHandler;
this.panelStateUpdateHandler = panelStateUpdateHandler;
recentlyClosedTabs = new ClosedTab[0];
lastSessionTabs = new ClosedTab[0];
readPreviousSessionData();
}
public void startListeningForClosedTabs() {
EventDispatcher.getInstance().registerGeckoThreadListener(this, "ClosedTabs:Data");
GeckoAppShell.notifyObservers("ClosedTabs:StartNotifications", null);
}
public void stopListeningForClosedTabs() {
GeckoAppShell.notifyObservers("ClosedTabs:StopNotifications", null);
EventDispatcher.getInstance().unregisterGeckoThreadListener(this, "ClosedTabs:Data");
recentlyClosedTabsReceived = false;
}
public void startListeningForHistorySanitize() {
EventDispatcher.getInstance().registerGeckoThreadListener(this, "Sanitize:Finished");
}
public void stopListeningForHistorySanitize() {
EventDispatcher.getInstance().unregisterGeckoThreadListener(this, "Sanitize:Finished");
}
@Override
public void handleMessage(String event, NativeJSObject message, EventCallback callback) {
switch (event) {
case "ClosedTabs:Data":
updateRecentlyClosedTabs(message);
break;
case "Sanitize:Finished":
clearLastSessionData();
break;
}
}
private void updateRecentlyClosedTabs(NativeJSObject message) {
final NativeJSObject[] tabs = message.getObjectArray("tabs");
final int length = tabs.length;
final ClosedTab[] closedTabs = new ClosedTab[length];
for (int i = 0; i < length; i++) {
final NativeJSObject tab = tabs[i];
closedTabs[i] = new ClosedTab(tab.getString("url"), tab.getString("title"), tab.getObject("data").toString());
}
// Only modify recentlyClosedTabs on the UI thread.
ThreadUtils.postToUiThread(new Runnable() {
@Override
public void run() {
// Save some data about the old panel state, so we can be
// smarter about notifying the recycler view which bits changed.
int prevClosedTabsCount = recentlyClosedTabs.length;
boolean prevSectionHeaderVisibility = isSectionHeaderVisible();
int prevSectionHeaderIndex = getSectionHeaderIndex();
recentlyClosedTabs = closedTabs;
recentlyClosedTabsReceived = true;
recentTabsUpdateHandler.onRecentTabsCountUpdated(
getClosedTabsCount(), recentlyClosedTabsReceived);
panelStateUpdateHandler.onPanelStateUpdated(CHILD_RECENT_TABS);
// Handle the section header hiding/unhiding.
updateHeaderVisibility(prevSectionHeaderVisibility, prevSectionHeaderIndex);
// Update the "Recently closed" part of the tab list.
updateTabsList(prevClosedTabsCount, recentlyClosedTabs.length, getFirstRecentTabIndex(), getLastRecentTabIndex());
}
});
}
private void readPreviousSessionData() {
// If we happen to initialise before GeckoApp, waiting on either the main or the background
// thread can lead to a deadlock, so we have to run on a separate thread instead.
final Thread parseThread = new Thread(new Runnable() {
@Override
public void run() {
// Make sure that the start up code has had a chance to update sessionstore.old as necessary.
GeckoProfile.get(context).waitForOldSessionDataProcessing();
final String jsonString = GeckoProfile.get(context).readPreviousSessionFile();
if (jsonString == null) {
// No previous session data.
return;
}
final List<ClosedTab> parsedTabs = new ArrayList<>();
new SessionParser() {
@Override
public void onTabRead(SessionTab tab) {
final String url = tab.getUrl();
// Don't show last tabs for about:home
if (AboutPages.isAboutHome(url)) {
return;
}
parsedTabs.add(new ClosedTab(url, tab.getTitle(), tab.getTabObject().toString()));
}
}.parse(jsonString);
final ClosedTab[] closedTabs = parsedTabs.toArray(new ClosedTab[parsedTabs.size()]);
// Only modify lastSessionTabs on the UI thread.
ThreadUtils.postToUiThread(new Runnable() {
@Override
public void run() {
// Save some data about the old panel state, so we can be
// smarter about notifying the recycler view which bits changed.
int prevClosedTabsCount = lastSessionTabs.length;
boolean prevSectionHeaderVisibility = isSectionHeaderVisible();
int prevSectionHeaderIndex = getSectionHeaderIndex();
lastSessionTabs = closedTabs;
recentTabsUpdateHandler.onRecentTabsCountUpdated(
getClosedTabsCount(), recentlyClosedTabsReceived);
panelStateUpdateHandler.onPanelStateUpdated(CHILD_RECENT_TABS);
// Handle the section header hiding/unhiding.
updateHeaderVisibility(prevSectionHeaderVisibility, prevSectionHeaderIndex);
// Update the "Tabs from last time" part of the tab list.
updateTabsList(prevClosedTabsCount, lastSessionTabs.length, getFirstLastSessionTabIndex(), getLastLastSessionTabIndex());
}
});
}
}, "LastSessionTabsThread");
parseThread.start();
}
private void clearLastSessionData() {
final ClosedTab[] emptyLastSessionTabs = new ClosedTab[0];
// Only modify mLastSessionTabs on the UI thread.
ThreadUtils.postToUiThread(new Runnable() {
@Override
public void run() {
// Save some data about the old panel state, so we can be
// smarter about notifying the recycler view which bits changed.
int prevClosedTabsCount = lastSessionTabs.length;
boolean prevSectionHeaderVisibility = isSectionHeaderVisible();
int prevSectionHeaderIndex = getSectionHeaderIndex();
lastSessionTabs = emptyLastSessionTabs;
recentTabsUpdateHandler.onRecentTabsCountUpdated(
getClosedTabsCount(), recentlyClosedTabsReceived);
panelStateUpdateHandler.onPanelStateUpdated(CHILD_RECENT_TABS);
// Handle the section header hiding.
updateHeaderVisibility(prevSectionHeaderVisibility, prevSectionHeaderIndex);
// Handle the "tabs from last time" being cleared.
if (prevClosedTabsCount > 0) {
notifyItemRangeRemoved(getFirstLastSessionTabIndex(), prevClosedTabsCount);
}
}
});
}
private void updateHeaderVisibility(boolean prevSectionHeaderVisibility, int prevSectionHeaderIndex) {
if (prevSectionHeaderVisibility && !isSectionHeaderVisible()) {
notifyItemRemoved(prevSectionHeaderIndex);
} else if (!prevSectionHeaderVisibility && isSectionHeaderVisible()) {
notifyItemInserted(getSectionHeaderIndex());
}
}
/**
* Updates the tab list as necessary to account for any changes in tab count in a particular data source.
*
* Since the session store only sends out full updates, we don't know for sure what has changed compared
* to the last data set, so we can only animate if the tab count actually changes.
*
* @param prevClosedTabsCount The previous number of closed tabs from that data source.
* @param closedTabsCount The current number of closed tabs contained in that data source.
* @param firstTabListIndex The current position of that data source's first item in the RecyclerView.
* @param lastTabListIndex The current position of that data source's last item in the RecyclerView.
*/
private void updateTabsList(int prevClosedTabsCount, int closedTabsCount, int firstTabListIndex, int lastTabListIndex) {
final int closedTabsCountChange = closedTabsCount - prevClosedTabsCount;
if (closedTabsCountChange <= 0) {
notifyItemRangeRemoved(lastTabListIndex + 1, -closedTabsCountChange); // Remove tabs from the bottom of the list.
notifyItemRangeChanged(firstTabListIndex, closedTabsCount); // Update the contents of the remaining items.
} else { // closedTabsCountChange > 0
notifyItemRangeInserted(firstTabListIndex, closedTabsCountChange); // Add additional tabs at the top of the list.
notifyItemRangeChanged(firstTabListIndex + closedTabsCountChange, prevClosedTabsCount); // Update any previous list items.
}
}
public String restoreTabFromPosition(int position) {
final List<String> dataList = new ArrayList<>(1);
dataList.add(getClosedTabForPosition(position).data);
final String telemetryExtra =
position > getLastRecentTabIndex() ? TELEMETRY_EXTRA_LAST_TIME : TELEMETRY_EXTRA_RECENTLY_CLOSED;
restoreSessionWithHistory(dataList);
return telemetryExtra;
}
public String restoreAllTabs() {
if (recentlyClosedTabs.length == 0 && lastSessionTabs.length == 0) {
return null;
}
final List<String> dataList = new ArrayList<>(getClosedTabsCount());
addTabDataToList(dataList, recentlyClosedTabs);
addTabDataToList(dataList, lastSessionTabs);
final String telemetryExtra = recentlyClosedTabs.length > 0 && lastSessionTabs.length > 0 ? TELEMETRY_EXTRA_MIXED :
recentlyClosedTabs.length > 0 ? TELEMETRY_EXTRA_RECENTLY_CLOSED : TELEMETRY_EXTRA_LAST_TIME;
restoreSessionWithHistory(dataList);
return telemetryExtra;
}
private void addTabDataToList(List<String> dataList, ClosedTab[] closedTabs) {
for (ClosedTab closedTab : closedTabs) {
dataList.add(closedTab.data);
}
}
private static void restoreSessionWithHistory(List<String> dataList) {
final JSONObject json = new JSONObject();
try {
json.put("tabs", new JSONArray(dataList));
} catch (JSONException e) {
Log.e(LOGTAG, "JSON error", e);
}
GeckoAppShell.notifyObservers("Session:RestoreRecentTabs", json.toString());
}
@Override
public CombinedHistoryItem onCreateViewHolder(ViewGroup parent, int viewType) {
final LayoutInflater inflater = LayoutInflater.from(parent.getContext());
final View view;
final CombinedHistoryItem.ItemType itemType = CombinedHistoryItem.ItemType.viewTypeToItemType(viewType);
switch (itemType) {
case NAVIGATION_BACK:
view = inflater.inflate(R.layout.home_combined_back_item, parent, false);
return new CombinedHistoryItem.HistoryItem(view);
case SECTION_HEADER:
view = inflater.inflate(R.layout.home_header_row, parent, false);
return new CombinedHistoryItem.BasicItem(view);
case CLOSED_TAB:
view = inflater.inflate(R.layout.home_item_row, parent, false);
return new CombinedHistoryItem.HistoryItem(view);
}
return null;
}
@Override
public void onBindViewHolder(CombinedHistoryItem holder, final int position) {
final CombinedHistoryItem.ItemType itemType = getItemTypeForPosition(position);
switch (itemType) {
case SECTION_HEADER:
((TextView) holder.itemView).setText(context.getString(R.string.home_closed_tabs_title2));
break;
case CLOSED_TAB:
final ClosedTab closedTab = getClosedTabForPosition(position);
((CombinedHistoryItem.HistoryItem) holder).bind(closedTab);
break;
}
}
@Override
public int getItemCount() {
int itemCount = 1; // NAVIGATION_BACK button is always visible.
if (isSectionHeaderVisible()) {
itemCount += 1;
}
itemCount += getClosedTabsCount();
return itemCount;
}
private CombinedHistoryItem.ItemType getItemTypeForPosition(int position) {
if (position == NAVIGATION_BACK_BUTTON_INDEX) {
return ItemType.NAVIGATION_BACK;
}
if (position == getSectionHeaderIndex() && isSectionHeaderVisible()) {
return ItemType.SECTION_HEADER;
}
return ItemType.CLOSED_TAB;
}
@Override
public int getItemViewType(int position) {
return CombinedHistoryItem.ItemType.itemTypeToViewType(getItemTypeForPosition(position));
}
public int getClosedTabsCount() {
return recentlyClosedTabs.length + lastSessionTabs.length;
}
private boolean isSectionHeaderVisible() {
return recentlyClosedTabs.length > 0 || lastSessionTabs.length > 0;
}
private int getSectionHeaderIndex() {
return isSectionHeaderVisible() ?
NAVIGATION_BACK_BUTTON_INDEX + 1 :
NAVIGATION_BACK_BUTTON_INDEX;
}
private int getFirstRecentTabIndex() {
return getSectionHeaderIndex() + 1;
}
private int getLastRecentTabIndex() {
return getSectionHeaderIndex() + recentlyClosedTabs.length;
}
private int getFirstLastSessionTabIndex() {
return getLastRecentTabIndex() + 1;
}
private int getLastLastSessionTabIndex() {
return getLastRecentTabIndex() + lastSessionTabs.length;
}
/**
* Get the closed tab corresponding to a RecyclerView list item.
*
* The Recent Tab folder combines two data sources, so if we want to get the ClosedTab object
* behind a certain list item, we need to route this request to the corresponding data source
* and also transform the global list position into a local array index.
*/
private ClosedTab getClosedTabForPosition(int position) {
final ClosedTab closedTab;
if (position <= getLastRecentTabIndex()) { // Upper part of the list is "Recently closed tabs".
closedTab = recentlyClosedTabs[position - getFirstRecentTabIndex()];
} else { // Lower part is "Tabs from last time".
closedTab = lastSessionTabs[position - getFirstLastSessionTabIndex()];
}
return closedTab;
}
@Override
public HomeContextMenuInfo makeContextMenuInfoFromPosition(View view, int position) {
final CombinedHistoryItem.ItemType itemType = getItemTypeForPosition(position);
final HomeContextMenuInfo info;
switch (itemType) {
case CLOSED_TAB:
info = new HomeContextMenuInfo(view, position, -1);
ClosedTab closedTab = getClosedTabForPosition(position);
return populateChildInfoFromTab(info, closedTab);
}
return null;
}
protected static HomeContextMenuInfo populateChildInfoFromTab(HomeContextMenuInfo info, ClosedTab tab) {
info.url = tab.url;
info.title = tab.title;
return info;
}
}
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