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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* ***** BEGIN LICENSE BLOCK *****
*
* 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/.
*
* ***** END LICENSE BLOCK ***** */
package org.mozilla.gecko;
import java.util.LinkedList;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
public abstract class SessionParser {
private static final String LOGTAG = "GeckoSessionParser";
public class SessionTab {
final private String mTitle;
final private String mUrl;
final private JSONObject mTabObject;
private boolean mIsSelected;
private SessionTab(String title, String url, boolean isSelected, JSONObject tabObject) {
mTitle = title;
mUrl = url;
mIsSelected = isSelected;
mTabObject = tabObject;
}
public String getTitle() {
return mTitle;
}
public String getUrl() {
return mUrl;
}
public boolean isSelected() {
return mIsSelected;
}
public JSONObject getTabObject() {
return mTabObject;
}
/**
* Is this tab pointing to about:home and does not contain any other history?
*/
public boolean isAboutHomeWithoutHistory() {
JSONArray entries = mTabObject.optJSONArray("entries");
return entries != null && entries.length() == 1 && AboutPages.isAboutHome(mUrl);
}
};
abstract public void onTabRead(SessionTab tab);
/**
* Placeholder method that must be overloaded to handle closedTabs while parsing session data.
*
* @param closedTabs, JSONArray of recently closed tab entries.
* @throws JSONException
*/
public void onClosedTabsRead(final JSONArray closedTabs) throws JSONException {
}
/**
* Parses the provided session store data and calls onTabRead for each tab that has been found.
*
* @param sessionStrings One or more strings containing session store data.
* @return False if any of the session strings provided didn't contain valid session store data.
*/
public boolean parse(String... sessionStrings) {
final LinkedList<SessionTab> sessionTabs = new LinkedList<SessionTab>();
int totalCount = 0;
int selectedIndex = -1;
try {
for (String sessionString : sessionStrings) {
final JSONArray windowsArray = new JSONObject(sessionString).getJSONArray("windows");
if (windowsArray.length() == 0) {
// Session json can be empty if the user has opted out of session restore.
Log.d(LOGTAG, "Session restore file is empty, no session entries found.");
continue;
}
final JSONObject window = windowsArray.getJSONObject(0);
final JSONArray tabs = window.getJSONArray("tabs");
final int optSelected = window.optInt("selected", -1);
final JSONArray closedTabs = window.optJSONArray("closedTabs");
if (closedTabs != null) {
onClosedTabsRead(closedTabs);
}
for (int i = 0; i < tabs.length(); i++) {
final JSONObject tab = tabs.getJSONObject(i);
final int index = tab.getInt("index");
final JSONArray entries = tab.getJSONArray("entries");
if (index < 1 || entries.length() < index) {
Log.w(LOGTAG, "Session entries and index don't agree.");
continue;
}
final JSONObject entry = entries.getJSONObject(index - 1);
final String url = entry.getString("url");
String title = entry.optString("title");
if (title.length() == 0) {
title = url;
}
totalCount++;
boolean selected = false;
if (optSelected == i + 1) {
selected = true;
selectedIndex = totalCount;
}
sessionTabs.add(new SessionTab(title, url, selected, tab));
}
}
} catch (JSONException e) {
Log.e(LOGTAG, "JSON error", e);
return false;
}
// If no selected index was found, select the first tab.
if (selectedIndex == -1 && sessionTabs.size() > 0) {
sessionTabs.getFirst().mIsSelected = true;
}
for (SessionTab tab : sessionTabs) {
onTabRead(tab);
}
return true;
}
}
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