| /* |
| * 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.quicksearchbox; |
| |
| import android.database.DataSetObservable; |
| import android.database.DataSetObserver; |
| import android.util.Log; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * A SuggestionCursor that is backed by a list of Suggestions. |
| */ |
| public class ListSuggestionCursor extends AbstractSuggestionCursorWrapper { |
| |
| private static final int DEFAULT_CAPACITY = 16; |
| |
| private final DataSetObservable mDataSetObservable = new DataSetObservable(); |
| |
| private final ArrayList<Suggestion> mSuggestions; |
| |
| private int mPos = 0; |
| |
| public ListSuggestionCursor(String userQuery) { |
| this(userQuery, DEFAULT_CAPACITY); |
| } |
| |
| public ListSuggestionCursor(String userQuery, Suggestion...suggestions) { |
| this(userQuery, suggestions.length); |
| for (Suggestion suggestion : suggestions) { |
| mSuggestions.add(suggestion); |
| } |
| } |
| |
| public ListSuggestionCursor(String userQuery, int capacity) { |
| super(userQuery); |
| mSuggestions = new ArrayList<Suggestion>(capacity); |
| } |
| |
| /** |
| * Adds a suggestion from another suggestion cursor. |
| * |
| * @return {@code true} if the suggestion was added. |
| */ |
| public boolean add(Suggestion suggestion) { |
| mSuggestions.add(suggestion); |
| return true; |
| } |
| |
| public void close() { |
| mSuggestions.clear(); |
| } |
| |
| public int getPosition() { |
| return mPos; |
| } |
| |
| public void moveTo(int pos) { |
| mPos = pos; |
| } |
| |
| public boolean moveToNext() { |
| int size = mSuggestions.size(); |
| if (mPos >= size) { |
| // Already past the end |
| return false; |
| } |
| mPos++; |
| return mPos < size; |
| } |
| |
| public void removeRow() { |
| mSuggestions.remove(mPos); |
| } |
| |
| public void replaceRow(Suggestion suggestion) { |
| mSuggestions.set(mPos, suggestion); |
| } |
| |
| public int getCount() { |
| return mSuggestions.size(); |
| } |
| |
| @Override |
| protected Suggestion current() { |
| return mSuggestions.get(mPos); |
| } |
| |
| @Override |
| public String toString() { |
| return getClass().getSimpleName() + "{[" + getUserQuery() + "] " + mSuggestions + "}"; |
| } |
| |
| /** |
| * Register an observer that is called when changes happen to this data set. |
| * |
| * @param observer gets notified when the data set changes. |
| */ |
| public void registerDataSetObserver(DataSetObserver observer) { |
| mDataSetObservable.registerObserver(observer); |
| } |
| |
| /** |
| * Unregister an observer that has previously been registered with |
| * {@link #registerDataSetObserver(DataSetObserver)} |
| * |
| * @param observer the observer to unregister. |
| */ |
| public void unregisterDataSetObserver(DataSetObserver observer) { |
| mDataSetObservable.unregisterObserver(observer); |
| } |
| |
| protected void notifyDataSetChanged() { |
| mDataSetObservable.notifyChanged(); |
| } |
| } |