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/*
* 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.Fragment;
import android.app.LoaderManager.LoaderCallbacks;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.Context;
import android.content.CursorLoader;
import android.content.Loader;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.LayoutInflater;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.MeasureSpec;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.ResourceCursorAdapter;
import android.widget.TextView;
import com.android.browser.CombinedBookmarkHistoryView.CombinedBookmarksCallbacks;
import com.android.browser.provider.SnapshotProvider.Snapshots;
import java.text.DateFormat;
import java.util.Date;
public class BrowserSnapshotPage extends Fragment implements
LoaderCallbacks<Cursor>, OnItemClickListener {
public static final String EXTRA_ANIMATE_ID = "animate_id";
private static final int LOADER_SNAPSHOTS = 1;
private static final String[] PROJECTION = new String[] {
Snapshots._ID,
Snapshots.TITLE,
"length(" + Snapshots.VIEWSTATE + ")",
Snapshots.THUMBNAIL,
Snapshots.FAVICON,
Snapshots.URL,
Snapshots.DATE_CREATED,
};
private static final int SNAPSHOT_TITLE = 1;
private static final int SNAPSHOT_VIEWSTATE_LENGTH = 2;
private static final int SNAPSHOT_THUMBNAIL = 3;
private static final int SNAPSHOT_FAVICON = 4;
private static final int SNAPSHOT_URL = 5;
private static final int SNAPSHOT_DATE_CREATED = 6;
GridView mGrid;
View mEmpty;
SnapshotAdapter mAdapter;
CombinedBookmarksCallbacks mCallback;
public static BrowserSnapshotPage newInstance(CombinedBookmarksCallbacks cb,
Bundle extras) {
BrowserSnapshotPage instance = new BrowserSnapshotPage();
instance.mCallback = cb;
instance.setArguments(extras);
return instance;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.snapshots, container, false);
mEmpty = view.findViewById(android.R.id.empty);
mGrid = (GridView) view.findViewById(R.id.grid);
setupGrid(inflater);
getLoaderManager().initLoader(LOADER_SNAPSHOTS, null, this);
return view;
}
@Override
public void onDestroyView() {
super.onDestroyView();
getLoaderManager().destroyLoader(LOADER_SNAPSHOTS);
if (mAdapter != null) {
mAdapter.changeCursor(null);
mAdapter = null;
}
}
void setupGrid(LayoutInflater inflater) {
View item = inflater.inflate(R.layout.snapshot_item, mGrid, false);
int mspec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
item.measure(mspec, mspec);
int width = item.getMeasuredWidth();
mGrid.setColumnWidth(width);
mGrid.setOnItemClickListener(this);
mGrid.setOnCreateContextMenuListener(this);
}
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
if (id == LOADER_SNAPSHOTS) {
return new CursorLoader(getActivity(),
Snapshots.CONTENT_URI, PROJECTION,
null, null, Snapshots.DATE_CREATED + " DESC");
}
return null;
}
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
if (loader.getId() == LOADER_SNAPSHOTS) {
if (mAdapter == null) {
mAdapter = new SnapshotAdapter(getActivity(), data);
mGrid.setAdapter(mAdapter);
} else {
mAdapter.changeCursor(data);
}
boolean empty = mAdapter.isEmpty();
mGrid.setVisibility(empty ? View.GONE : View.VISIBLE);
mEmpty.setVisibility(empty ? View.VISIBLE : View.GONE);
}
}
@Override
public void onLoaderReset(Loader<Cursor> loader) {
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
MenuInflater inflater = getActivity().getMenuInflater();
inflater.inflate(R.menu.snapshots_context, menu);
// Create the header, re-use BookmarkItem (has the layout we want)
BookmarkItem header = new BookmarkItem(getActivity());
AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
populateBookmarkItem(mAdapter.getItem(info.position), header);
menu.setHeaderView(header);
}
private void populateBookmarkItem(Cursor cursor, BookmarkItem item) {
item.setName(cursor.getString(SNAPSHOT_TITLE));
item.setUrl(cursor.getString(SNAPSHOT_URL));
item.setFavicon(getBitmap(cursor, SNAPSHOT_FAVICON));
}
static Bitmap getBitmap(Cursor cursor, int columnIndex) {
byte[] data = cursor.getBlob(columnIndex);
if (data == null) {
return null;
}
return BitmapFactory.decodeByteArray(data, 0, data.length);
}
@Override
public boolean onContextItemSelected(MenuItem item) {
if (item.getItemId() == R.id.delete_context_menu_id) {
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
deleteSnapshot(info.id);
return true;
}
return super.onContextItemSelected(item);
}
void deleteSnapshot(long id) {
final Uri uri = ContentUris.withAppendedId(Snapshots.CONTENT_URI, id);
final ContentResolver cr = getActivity().getContentResolver();
new Thread() {
@Override
public void run() {
cr.delete(uri, null, null);
}
}.start();
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
mCallback.openSnapshot(id);
}
private static class SnapshotAdapter extends ResourceCursorAdapter {
public SnapshotAdapter(Context context, Cursor c) {
super(context, R.layout.snapshot_item, c, 0);
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
ImageView thumbnail = (ImageView) view.findViewById(R.id.thumb);
byte[] thumbBlob = cursor.getBlob(SNAPSHOT_THUMBNAIL);
if (thumbBlob == null) {
thumbnail.setImageResource(R.drawable.browser_thumbnail);
} else {
Bitmap thumbBitmap = BitmapFactory.decodeByteArray(
thumbBlob, 0, thumbBlob.length);
thumbnail.setImageBitmap(thumbBitmap);
}
TextView title = (TextView) view.findViewById(R.id.title);
title.setText(cursor.getString(SNAPSHOT_TITLE));
TextView size = (TextView) view.findViewById(R.id.size);
int stateLen = cursor.getInt(SNAPSHOT_VIEWSTATE_LENGTH);
size.setText(String.format("%.2fMB", stateLen / 1024f / 1024f));
long timestamp = cursor.getLong(SNAPSHOT_DATE_CREATED);
TextView date = (TextView) view.findViewById(R.id.date);
DateFormat dateFormat = DateFormat.getDateInstance(DateFormat.SHORT);
date.setText(dateFormat.format(new Date(timestamp)));
}
@Override
public Cursor getItem(int position) {
return (Cursor) super.getItem(position);
}
}
}
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