/*
* 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.Activity;
import android.content.ClipData;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.provider.BrowserContract;
import android.view.ActionMode;
import android.view.ActionMode.Callback;
import android.view.DragEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnDragListener;
import android.view.ViewGroup;
public class BookmarkDragHandler implements Callback {
public static interface BookmarkDragController {
boolean startDrag(Cursor item);
ViewGroup getActionModeView(ActionMode mode, BookmarkDragState state);
void actionItemClicked(View v, BookmarkDragState state);
}
public static interface BookmarkDragAdapter {
void setBookmarkDragHandler(BookmarkDragHandler handler);
Cursor getItemForView(View v);
}
public static class BookmarkDragState {
public long id;
public long parent;
public Object extraState;
}
static final String BOOKMARK_DRAG_LABEL = "com.android.browser.BOOKMARK_LABEL";
private Activity mActivity;
private BookmarkDragController mDragController;
private BookmarkDragAdapter mDragAdapter;
private ActionMode mActionMode;
private BookmarkDragState mDragState;
public BookmarkDragHandler(Activity activity, BookmarkDragController controller,
BookmarkDragAdapter adapter) {
mActivity = activity;
mDragController = controller;
mDragAdapter = adapter;
mDragAdapter.setBookmarkDragHandler(this);
}
public boolean startDrag(View view, Cursor item, long id, Object extraState) {
if (!mDragController.startDrag(item)) {
return false;
}
Uri uri = ContentUris.withAppendedId(
BrowserContract.Bookmarks.CONTENT_URI, id);
ClipData data = ClipData.newRawUri(BOOKMARK_DRAG_LABEL, uri);
BookmarkDragState state = new BookmarkDragState();
state.id = id;
state.parent = item.getLong(BookmarksLoader.COLUMN_INDEX_PARENT);
state.extraState = extraState;
mDragState = state;
view.startDrag(data, new View.DragShadowBuilder(view), state, 0);
mActionMode = view.startActionMode(this);
return true;
}
public void registerBookmarkDragHandler(View view) {
view.setOnDragListener(mBookmarkDragListener);
}
private OnDragListener mBookmarkDragListener = new OnDragListener() {
@Override
public boolean onDrag(View v, DragEvent event) {
Cursor c = mDragAdapter.getItemForView(v);
BookmarkDragState state = (BookmarkDragState) event.getLocalState();
switch (event.getAction()) {
case DragEvent.ACTION_DRAG_STARTED:
return true;
case DragEvent.ACTION_DROP:
long id = c.getLong(BookmarksLoader.COLUMN_INDEX_ID);
if (id == state.id) {
// We dropped onto ourselves, show the context menu
v.showContextMenu();
return false;
}
long parent = c.getLong(BookmarksLoader.COLUMN_INDEX_PARENT);
if (isFolder(c)) {
parent = c.getLong(BookmarksLoader.COLUMN_INDEX_ID);
}
if (parent != state.parent) {
ContentResolver cr = mActivity.getContentResolver();
ContentValues values = new ContentValues();
values.put(BrowserContract.Bookmarks.PARENT, parent);
Uri uri = event.getClipData().getItemAt(0).getUri();
cr.update(uri, values, null, null);
}
break;
}
return false;
}
};
private OnDragListener mActionModeDragListener = new OnDragListener() {
@Override
public boolean onDrag(View v, DragEvent event) {
BookmarkDragState state = (BookmarkDragState) event.getLocalState();
switch (event.getAction()) {
case DragEvent.ACTION_DRAG_STARTED:
return true;
case DragEvent.ACTION_DROP:
mDragController.actionItemClicked(v, state);
// fall through
case DragEvent.ACTION_DRAG_ENDED:
if (mActionMode != null) {
mActionMode.finish();
mActionMode = null;
}
return true;
}
return false;
}
};
static boolean isFolder(Cursor c) {
return c.getInt(BookmarksLoader.COLUMN_INDEX_IS_FOLDER) != 0;
}
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
ViewGroup view = mDragController.getActionModeView(mode, mDragState);
int count = view.getChildCount();
for (int i = 0; i < count; i++) {
view.getChildAt(i).setOnDragListener(mActionModeDragListener);
}
mode.setCustomView(view);
return true;
}
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return true;
}
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
return false;
}
@Override
public void onDestroyActionMode(ActionMode mode) {
}
}