/*
* Copyright (C) 2011 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.app.ActionBar;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v13.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.Menu;
import android.view.MenuItem;
import com.android.browser.UI.ComboViews;
import java.util.ArrayList;
public class ComboViewActivity extends Activity implements CombinedBookmarksCallbacks {
private static final String STATE_SELECTED_TAB = "tab";
public static final String EXTRA_COMBO_ARGS = "combo_args";
public static final String EXTRA_INITIAL_VIEW = "initial_view";
public static final String EXTRA_OPEN_SNAPSHOT = "snapshot_id";
public static final String EXTRA_OPEN_ALL = "open_all";
public static final String EXTRA_CURRENT_URL = "url";
private ViewPager mViewPager;
private TabsAdapter mTabsAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setResult(RESULT_CANCELED);
Bundle extras = getIntent().getExtras();
Bundle args = extras.getBundle(EXTRA_COMBO_ARGS);
String svStr = extras.getString(EXTRA_INITIAL_VIEW, null);
ComboViews startingView = svStr != null
? ComboViews.valueOf(svStr)
: ComboViews.Bookmarks;
mViewPager = new ViewPager(this);
mViewPager.setId(R.id.tab_view);
setContentView(mViewPager);
final ActionBar bar = getActionBar();
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
if (BrowserActivity.isTablet(this)) {
bar.setDisplayOptions(ActionBar.DISPLAY_SHOW_HOME
| ActionBar.DISPLAY_USE_LOGO);
bar.setHomeButtonEnabled(true);
} else {
bar.setDisplayOptions(0);
}
mTabsAdapter = new TabsAdapter(this, mViewPager);
mTabsAdapter.addTab(bar.newTab().setText(R.string.tab_bookmarks),
BrowserBookmarksPage.class, args);
mTabsAdapter.addTab(bar.newTab().setText(R.string.tab_history),
BrowserHistoryPage.class, args);
mTabsAdapter.addTab(bar.newTab().setText(R.string.tab_snapshots),
BrowserSnapshotPage.class, args);
if (savedInstanceState != null) {
bar.setSelectedNavigationItem(
savedInstanceState.getInt(STATE_SELECTED_TAB, 0));
} else {
switch (startingView) {
case Bookmarks:
mViewPager.setCurrentItem(0);
break;
case History:
mViewPager.setCurrentItem(1);
break;
case Snapshots:
mViewPager.setCurrentItem(2);
break;
}
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(STATE_SELECTED_TAB,
getActionBar().getSelectedNavigationIndex());
}
@Override
public void openUrl(String url) {
Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
setResult(RESULT_OK, i);
finish();
}
@Override
public void openInNewTab(String... urls) {
Intent i = new Intent();
i.putExtra(EXTRA_OPEN_ALL, urls);
setResult(RESULT_OK, i);
finish();
}
@Override
public void close() {
finish();
}
@Override
public void openSnapshot(long id) {
Intent i = new Intent();
i.putExtra(EXTRA_OPEN_SNAPSHOT, id);
setResult(RESULT_OK, i);
finish();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.combined, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
finish();
return true;
} else if (item.getItemId() == R.id.preferences_menu_id) {
String url = getIntent().getStringExtra(EXTRA_CURRENT_URL);
Intent intent = new Intent(this, BrowserPreferencesPage.class);
intent.putExtra(BrowserPreferencesPage.CURRENT_PAGE, url);
startActivityForResult(intent, Controller.PREFERENCES_PAGE);
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* This is a helper class that implements the management of tabs and all
* details of connecting a ViewPager with associated TabHost. It relies on a
* trick. Normally a tab host has a simple API for supplying a View or
* Intent that each tab will show. This is not sufficient for switching
* between pages. So instead we make the content part of the tab host
* 0dp high (it is not shown) and the TabsAdapter supplies its own dummy
* view to show as the tab content. It listens to changes in tabs, and takes
* care of switch to the correct page in the ViewPager whenever the selected
* tab changes.
*/
public static class TabsAdapter extends FragmentPagerAdapter
implements ActionBar.TabListener, ViewPager.OnPageChangeListener {
private final Context mContext;
private final ActionBar mActionBar;
private final ViewPager mViewPager;
private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
static final class TabInfo {
private final Class<?> clss;
private final Bundle args;
TabInfo(Class<?> _class, Bundle _args) {
clss = _class;
args = _args;
}
}
public TabsAdapter(Activity activity, ViewPager pager) {
super(activity.getFragmentManager());
mContext = activity;
mActionBar = activity.getActionBar();
mViewPager = pager;
mViewPager.setAdapter(this);
mViewPager.setOnPageChangeListener(this);
}
public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args) {
TabInfo info = new TabInfo(clss, args);
tab.setTag(info);
tab.setTabListener(this);
mTabs.add(info);
mActionBar.addTab(tab);
notifyDataSetChanged();
}
@Override
public int getCount() {
return mTabs.size();
}
@Override
public Fragment getItem(int position) {
TabInfo info = mTabs.get(position);
return Fragment.instantiate(mContext, info.clss.getName(), info.args);
}
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
mActionBar.setSelectedNavigationItem(position);
}
@Override
public void onPageScrollStateChanged(int state) {
}
@Override
public void onTabSelected(android.app.ActionBar.Tab tab,
FragmentTransaction ft) {
Object tag = tab.getTag();
for (int i=0; i<mTabs.size(); i++) {
if (mTabs.get(i) == tag) {
mViewPager.setCurrentItem(i);
}
}
}
@Override
public void onTabUnselected(android.app.ActionBar.Tab tab,
FragmentTransaction ft) {
}
@Override
public void onTabReselected(android.app.ActionBar.Tab tab,
FragmentTransaction ft) {
}
}
private static String makeFragmentName(int viewId, int index) {
return "android:switcher:" + viewId + ":" + index;
}
}