Add an active tabs page.

The active tabs page gives the user the ability to see all of their
open tabs in a list, and switch tabs, create a new one, or close
an old one.

Fix for http://b/issue?id=2101994

Change-Id: Id4c14dd437f769144dbdb02011144ea97d8fd030
diff --git a/src/com/android/browser/ActiveTabsPage.java b/src/com/android/browser/ActiveTabsPage.java
new file mode 100644
index 0000000..c1b402a
--- /dev/null
+++ b/src/com/android/browser/ActiveTabsPage.java
@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 2009 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.browser;
+
+import android.view.KeyEvent;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.BaseAdapter;
+import android.widget.LinearLayout;
+import android.widget.ListView;
+import android.widget.TextView;
+
+public class ActiveTabsPage extends LinearLayout {
+    private final BrowserActivity   mBrowserActivity;
+    private final LayoutInflater    mFactory;
+    private final TabControl        mControl;
+    private final TabsListAdapter   mAdapter;
+    private final ListView          mListView;
+
+    public ActiveTabsPage(BrowserActivity context, TabControl control) {
+        super(context);
+        mBrowserActivity = context;
+        mControl = control;
+        mFactory = LayoutInflater.from(context);
+        mFactory.inflate(R.layout.active_tabs, this);
+        mListView = (ListView) findViewById(R.id.list);
+        mAdapter = new TabsListAdapter();
+        mListView.setAdapter(mAdapter);
+        mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+                public void onItemClick(AdapterView<?> parent, View view,
+                        int position, long id) {
+                    if (mControl.getTabCount() < TabControl.MAX_TABS) {
+                        position--;
+                    }
+                    boolean needToAttach = false;
+                    if (position == -1) {
+                        // Create a new tab
+                        mBrowserActivity.openTabToHomePage();
+                    } else {
+                        // Open the corresponding tab
+                        // If the tab is the current one, switchToTab will
+                        // do nothing and return, so we need to make sure
+                        // it gets attached back to its mContentView in
+                        // removeActiveTabPage
+                        needToAttach = !mBrowserActivity.switchToTab(position);
+                    }
+                    mBrowserActivity.removeActiveTabPage(needToAttach);
+                }
+        });
+    }
+
+    public boolean dispatchKeyEvent(KeyEvent event) {
+        if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
+            if (event.isDown()) return true;
+            mBrowserActivity.removeActiveTabPage(true);
+            return true;
+        }
+        return super.dispatchKeyEvent(event);
+    }
+
+    private class TabsListAdapter extends BaseAdapter {
+        public int getCount() {
+            int count = mControl.getTabCount();
+            if (count < TabControl.MAX_TABS) {
+                count++;
+            }
+            return count;
+        }
+        public Object getItem(int position) {
+            return null;
+        }
+        public long getItemId(int position) {
+            return position;
+        }
+        public View getView(int position, View convertView, ViewGroup parent) {
+            if (convertView == null) {
+                convertView = mFactory.inflate(R.layout.tab_view, null);
+            }
+            TextView title = (TextView) convertView.findViewById(R.id.title);
+            TextView url = (TextView) convertView.findViewById(R.id.url);
+            FakeWebView webView
+                    = (FakeWebView) convertView.findViewById(R.id.screen_shot);
+            View close = convertView.findViewById(R.id.close);
+
+            final int tabCount = mControl.getTabCount();
+            if (tabCount < TabControl.MAX_TABS) {
+                position--;
+            }
+            if (position == -1) {
+                title.setText(R.string.new_tab);
+                url.setText(R.string.http);
+                webView.setImageResource(R.drawable.ic_add_tab);
+                close.setVisibility(View.GONE);
+            } else {
+                TabControl.Tab tab = mControl.getTab(position);
+                mControl.populatePickerData(tab);
+                title.setText(tab.getTitle());
+                url.setText(tab.getUrl());
+                webView.setTab(tab);
+                close.setVisibility(View.VISIBLE);
+                final int closePosition = position;
+                close.setOnClickListener(new View.OnClickListener() {
+                        public void onClick(View v) {
+                            mBrowserActivity.closeTab(
+                                    mControl.getTab(closePosition));
+                            if (tabCount == 1) {
+                                mBrowserActivity.openTabToHomePage();
+                                mBrowserActivity.removeActiveTabPage(false);
+                            } else {
+                                mListView.setAdapter(mAdapter);
+                            }
+                        }
+                });
+            }
+            return convertView;
+        }
+    }
+}