Bug 0 - Moving embedding/android into mobile/android/base. r=mfinkle,blassey

mobile/android/base/Tabs.java

@@ -0,0 +1,176 @@
+/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (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.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Android code.
+ *
+ * The Initial Developer of the Original Code is Mozilla Foundation.
+ * Portions created by the Initial Developer are Copyright (C) 2009-2010
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Sriram Ramasubramanian <sriram@mozilla.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+package org.mozilla.gecko;
+
+import java.util.*;
+
+import android.content.ContentResolver;
+import android.graphics.drawable.*;
+import android.util.Log;
+
+import org.json.JSONObject;
+
+public class Tabs implements GeckoEventListener {
+    private static final String LOGTAG = "GeckoTabs";
+
+    private static int selectedTab = -1;
+    private HashMap<Integer, Tab> tabs;
+    private ArrayList<Tab> order;
+    private ContentResolver resolver;
+
+    private Tabs() {
+        tabs = new HashMap<Integer, Tab>();
+        order = new ArrayList<Tab>();
+        GeckoAppShell.registerGeckoEventListener("SessionHistory:New", this);
+        GeckoAppShell.registerGeckoEventListener("SessionHistory:Back", this);
+        GeckoAppShell.registerGeckoEventListener("SessionHistory:Forward", this);
+        GeckoAppShell.registerGeckoEventListener("SessionHistory:Goto", this);
+        GeckoAppShell.registerGeckoEventListener("SessionHistory:Purge", this);
+    }
+
+    public int getCount() {
+        return tabs.size();
+    }
+
+    public Tab addTab(int id, String url) {
+        if (tabs.containsKey(id))
+           return tabs.get(id);
+
+        Tab tab = new Tab(id, url);
+        tabs.put(id, tab);
+        order.add(tab);
+        Log.i(LOGTAG, "Added a tab with id: " + id + ", url: " + url);
+        return tab;
+    }
+
+    public void removeTab(int id) {
+        if (tabs.containsKey(id)) {
+            order.remove(getTab(id));
+            tabs.remove(id);
+            Log.i(LOGTAG, "Removed a tab with id: " + id);
+        }
+    }
+
+    public Tab selectTab(int id) {
+        if (!tabs.containsKey(id))
+            return null;
+ 
+        selectedTab = id;
+        return tabs.get(id);
+    }
+
+    public int getIndexOf(Tab tab) {
+        return order.lastIndexOf(tab);
+    }
+
+    public Tab getTabAt(int index) {
+        if (index < order.size())
+            return order.get(index);
+        else
+            return null;
+    }
+
+    public Tab getSelectedTab() {
+        return tabs.get(selectedTab);
+    }
+
+    public int getSelectedTabId() {
+        return selectedTab;
+    }
+
+    public boolean isSelectedTab(Tab tab) {
+        return (tab.getId() == selectedTab);
+    }
+
+    public Tab getTab(int id) {
+        if (getCount() == 0)
+            return null;
+
+        if (!tabs.containsKey(id))
+           return null;
+
+        return tabs.get(id);
+    }
+
+    public HashMap<Integer, Tab> getTabs() {
+        if (getCount() == 0)
+            return null;
+
+        return tabs;
+    }
+    
+    public ArrayList<Tab> getTabsInOrder() {
+        if (getCount() == 0)
+            return null;
+
+        return order;
+    }
+
+    public void setContentResolver(ContentResolver resolver) {
+        this.resolver = resolver;
+    }
+
+    public ContentResolver getContentResolver() {
+        return resolver;
+    }
+
+    //Making Tabs a singleton class
+    private static class TabsInstanceHolder {
+        private static final Tabs INSTANCE = new Tabs();
+    }
+
+    public static Tabs getInstance() {
+       return Tabs.TabsInstanceHolder.INSTANCE;
+    }
+
+    // GeckoEventListener implementation
+
+    public void handleMessage(String event, JSONObject message) {
+        try {
+            if (event.startsWith("SessionHistory:")) {
+                Tab tab = getTab(message.getInt("tabID"));
+                if (tab != null) {
+                    event = event.substring("SessionHistory:".length());
+                    tab.handleSessionHistoryMessage(event, message);
+                }
+            }
+        } catch (Exception e) { 
+            Log.i(LOGTAG, "handleMessage throws " + e + " for message: " + event);
+        }
+    }
+}