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/*
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* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package net.micode.notes.model;
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import android.appwidget.AppWidgetManager;
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import android.content.ContentUris;
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import android.content.Context;
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import android.database.Cursor;
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import android.text.TextUtils;
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import android.util.Log;
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import net.micode.notes.data.Notes;
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import net.micode.notes.data.Notes.CallNote;
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import net.micode.notes.data.Notes.DataColumns;
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import net.micode.notes.data.Notes.DataConstants;
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import net.micode.notes.data.Notes.NoteColumns;
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import net.micode.notes.data.Notes.TextNote;
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import net.micode.notes.tool.ResourceParser.NoteBgResources;
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public class WorkingNote {
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// Note for the working note
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//这个在Note里面定义了Note类的基本类型
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private Note mNote;
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// Note Id
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private long mNoteId;
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// Note content
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private String mContent;
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// Note mode
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private int mMode;
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private long mAlertDate;
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//最后的修改日期
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private long mModifiedDate;
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//定义的颜色的ID
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private int mBgColorId;
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//定义了一个int类型，用来定位到哪一个小组件被使用
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private int mWidgetId;
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//定义了一个int类型，用来区分使用了什么类型的小组件
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private int mWidgetType;
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//用来定位便签放在哪个文件夹
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private long mFolderId;
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private Context mContext;
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//定义为静态变量，保证不能再被更改。防止数据出现异常
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private static final String TAG = "WorkingNote";
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//定义一个布尔变量，用来保存是否要被删除。通过查看用法，发现在后面保存|修改的时候要进行判断。
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private boolean mIsDeleted;
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//后面定义的，暂时还不知道是啥，貌似是个接口
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private NoteSettingChangedListener mNoteSettingStatusListener;
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//定义一个数组，保存DataColumn数组当中的一些列变量。关于DataColumn的注解我写在了定义处。
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//之所以用一个字符串数组来调用DataColumn接口，是为了“方便在进行数据库操作时可以一次性指定需要查询的列”？
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//不过他只在定义cursor的时候调用了就是了。
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public static final String[] DATA_PROJECTION = new String[] {
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DataColumns.ID,//在Note里面定义一个接口类型
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DataColumns.CONTENT,
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DataColumns.MIME_TYPE,
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DataColumns.DATA1,
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DataColumns.DATA2,
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DataColumns.DATA3,
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DataColumns.DATA4,
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};
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//这里的用法基本同上方，不过这些接口最后使用在数据库中
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public static final String[] NOTE_PROJECTION = new String[] {
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NoteColumns.PARENT_ID,
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NoteColumns.ALERTED_DATE,
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NoteColumns.BG_COLOR_ID,
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NoteColumns.WIDGET_ID,
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NoteColumns.WIDGET_TYPE,
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NoteColumns.MODIFIED_DATE
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};
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/**
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* 定义了一系列的基础值。
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*/
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private static final int DATA_ID_COLUMN = 0;
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private static final int DATA_CONTENT_COLUMN = 1;
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private static final int DATA_MIME_TYPE_COLUMN = 2;
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private static final int DATA_MODE_COLUMN = 3;
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private static final int NOTE_PARENT_ID_COLUMN = 0;
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private static final int NOTE_ALERTED_DATE_COLUMN = 1;
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private static final int NOTE_BG_COLOR_ID_COLUMN = 2;
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private static final int NOTE_WIDGET_ID_COLUMN = 3;
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private static final int NOTE_WIDGET_TYPE_COLUMN = 4;
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private static final int NOTE_MODIFIED_DATE_COLUMN = 5;
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// New note construct
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//初始化一个新的操作的Note
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private WorkingNote(Context context, long folderId) {
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mContext = context;
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mAlertDate = 0;//这里为什么是0还存疑
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mModifiedDate = System.currentTimeMillis();//获取系统时间，保存给最后修改时间
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mFolderId = folderId;
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mNote = new Note();
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mNoteId = 0;
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mIsDeleted = false;
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mMode = 0;
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mWidgetType = Notes.TYPE_WIDGET_INVALIDE;
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}
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//由于传入了noteId,所以是对一个已经存在的便签进行操作。
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//由于一些基本的已经定义，所以传入的变量很少。
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// Existing note construct
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private WorkingNote(Context context, long noteId, long folderId) {
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mContext = context;
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mNoteId = noteId;
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mFolderId = folderId;
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mIsDeleted = false;
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mNote = new Note();
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loadNote();
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}
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private void loadNote() {
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//定义一个cursor游标，用来操作数据。这里传入了很多量，如URI、Id、和来自Projection的一系列。
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Cursor cursor = mContext.getContentResolver().query(
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ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mNoteId), NOTE_PROJECTION, null,
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null, null);
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//设置一个cursor，按行提取各种信息，保存到对应的变量中
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if (cursor != null) {
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if (cursor.moveToFirst()) {
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mFolderId = cursor.getLong(NOTE_PARENT_ID_COLUMN);
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mBgColorId = cursor.getInt(NOTE_BG_COLOR_ID_COLUMN);
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mWidgetId = cursor.getInt(NOTE_WIDGET_ID_COLUMN);
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mWidgetType = cursor.getInt(NOTE_WIDGET_TYPE_COLUMN);
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mAlertDate = cursor.getLong(NOTE_ALERTED_DATE_COLUMN);
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mModifiedDate = cursor.getLong(NOTE_MODIFIED_DATE_COLUMN);
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}
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cursor.close();
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} else {
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Log.e(TAG, "No note with id:" + mNoteId);
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throw new IllegalArgumentException("Unable to find note with id " + mNoteId);
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}
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loadNoteData();
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}
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//基本同上一个函数。值得注意的是这里对数据进行了筛选（通过selection）,还对MIME进行了判断后加载
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private void loadNoteData() {
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Cursor cursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI, DATA_PROJECTION,
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DataColumns.NOTE_ID + "=?", new String[] {
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String.valueOf(mNoteId)
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}, null);
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if (cursor != null) {
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if (cursor.moveToFirst()) {
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do {
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String type = cursor.getString(DATA_MIME_TYPE_COLUMN);
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if (DataConstants.NOTE.equals(type)) {
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mContent = cursor.getString(DATA_CONTENT_COLUMN);
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mMode = cursor.getInt(DATA_MODE_COLUMN);
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mNote.setTextDataId(cursor.getLong(DATA_ID_COLUMN));
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} else if (DataConstants.CALL_NOTE.equals(type)) {
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mNote.setCallDataId(cursor.getLong(DATA_ID_COLUMN));
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} else {
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Log.d(TAG, "Wrong note type with type:" + type);
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}
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} while (cursor.moveToNext());
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}
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cursor.close();
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} else {
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Log.e(TAG, "No data with id:" + mNoteId);
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throw new IllegalArgumentException("Unable to find note's data with id " + mNoteId);
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}
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}
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//简单的初始化函数，一会看一下用法
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public static WorkingNote createEmptyNote(Context context, long folderId, int widgetId,
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int widgetType, int defaultBgColorId) {
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WorkingNote note = new WorkingNote(context, folderId);
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note.setBgColorId(defaultBgColorId);
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note.setWidgetId(widgetId);
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note.setWidgetType(widgetType);
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return note;
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}
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public static WorkingNote load(Context context, long id) {
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return new WorkingNote(context, id, 0);
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}
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//这里涉及了多线程的操作。
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public synchronized boolean saveNote() {
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if (isWorthSaving()) {
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if (!existInDatabase()) {
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if ((mNoteId = Note.getNewNoteId(mContext, mFolderId)) == 0) {
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Log.e(TAG, "Create new note fail with id:" + mNoteId);
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return false;
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}
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}
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//由于没有这个便签，所以报错，并返回false
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mNote.syncNote(mContext, mNoteId);//这一行是同步信息的操作
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/**
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* Update widget content if there exist any widget of this note
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*/
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//对小组件的各种属性进行判断，来确定是否有组件，进行保存
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if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID
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&& mWidgetType != Notes.TYPE_WIDGET_INVALIDE
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&& mNoteSettingStatusListener != null) {
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mNoteSettingStatusListener.onWidgetChanged();
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}
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return true;
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} else {
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return false;
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}
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}
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/**
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* 以下定义、封装了一系列的实用函数，用于一些私有量的设置与判断
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*
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*/
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public boolean existInDatabase() {
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return mNoteId > 0;
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}
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private boolean isWorthSaving() {
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if (mIsDeleted || (!existInDatabase() && TextUtils.isEmpty(mContent))
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|| (existInDatabase() && !mNote.isLocalModified())) {
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return false;
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} else {
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return true;
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}
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}
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//这个变量设置是用来记录状态设定是否有发生过更改。
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public void setOnSettingStatusChangedListener(NoteSettingChangedListener l) {
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mNoteSettingStatusListener = l;
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}
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public void setAlertDate(long date, boolean set) {
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if (date != mAlertDate) {
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mAlertDate = date;
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mNote.setNoteValue(NoteColumns.ALERTED_DATE, String.valueOf(mAlertDate));
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}
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if (mNoteSettingStatusListener != null) {
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mNoteSettingStatusListener.onClockAlertChanged(date, set);
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}
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}
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public void markDeleted(boolean mark) {
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mIsDeleted = mark;
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if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID
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&& mWidgetType != Notes.TYPE_WIDGET_INVALIDE && mNoteSettingStatusListener != null) {
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mNoteSettingStatusListener.onWidgetChanged();
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}
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}
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public void setBgColorId(int id) {
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if (id != mBgColorId) {
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mBgColorId = id;
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if (mNoteSettingStatusListener != null) {
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mNoteSettingStatusListener.onBackgroundColorChanged();
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}
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mNote.setNoteValue(NoteColumns.BG_COLOR_ID, String.valueOf(id));
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}
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}
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//在EditActivities中使用，用来设定在list时的状态
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public void setCheckListMode(int mode) {
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if (mMode != mode) {
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if (mNoteSettingStatusListener != null) {
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mNoteSettingStatusListener.onCheckListModeChanged(mMode, mode);
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}
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mMode = mode;
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mNote.setTextData(TextNote.MODE, String.valueOf(mMode));
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}
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}
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public void setWidgetType(int type) {
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if (type != mWidgetType) {
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mWidgetType = type;
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mNote.setNoteValue(NoteColumns.WIDGET_TYPE, String.valueOf(mWidgetType));
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}
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}
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public void setWidgetId(int id) {
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if (id != mWidgetId) {
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mWidgetId = id;
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mNote.setNoteValue(NoteColumns.WIDGET_ID, String.valueOf(mWidgetId));
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}
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}
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public void setWorkingText(String text) {
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if (!TextUtils.equals(mContent, text)) {
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mContent = text;
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mNote.setTextData(DataColumns.CONTENT, mContent);
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}
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}
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/**
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* 从这里一直向上大概的都是一些设置状态的函数。
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* 原因是设置的私有量，保证数据的可靠性
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* 具体使用在onOptionsItemSelected NoteEditActivities类，中调用
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*/
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//这里的callNote我没有搞懂
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public void convertToCallNote(String phoneNumber, long callDate) {
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mNote.setCallData(CallNote.CALL_DATE, String.valueOf(callDate));
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mNote.setCallData(CallNote.PHONE_NUMBER, phoneNumber);
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mNote.setNoteValue(NoteColumns.PARENT_ID, String.valueOf(Notes.ID_CALL_RECORD_FOLDER));
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}
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public boolean hasClockAlert() {
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return (mAlertDate > 0 ? true : false);
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}
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public String getContent() {
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return mContent;
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}
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public long getAlertDate() {
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return mAlertDate;
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}
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public long getModifiedDate() {
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return mModifiedDate;
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}
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public int getBgColorResId() {
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return NoteBgResources.getNoteBgResource(mBgColorId);
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}
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public int getBgColorId() {
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return mBgColorId;
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}
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public int getTitleBgResId() {
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return NoteBgResources.getNoteTitleBgResource(mBgColorId);
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}
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public int getCheckListMode() {
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return mMode;
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}
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public long getNoteId() {
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return mNoteId;
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}
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public long getFolderId() {
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return mFolderId;
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}
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public int getWidgetId() {
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return mWidgetId;
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}
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public int getWidgetType() {
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return mWidgetType;
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}
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//声明了一个接口，具体都在EditActivies中进行实现。主要是一个监听（listener），来设置各个量的改变
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public interface NoteSettingChangedListener {
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/**
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* Called when the background color of current note has just changed
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*/
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void onBackgroundColorChanged();
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/**
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* Called when user set clock
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*/
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void onClockAlertChanged(long date, boolean set);
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/**
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* Call when user create note from widget
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*/
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void onWidgetChanged();
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/**
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* Call when switch between check list mode and normal mode
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* @param oldMode is previous mode before change
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* @param newMode is new mode
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*/
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void onCheckListModeChanged(int oldMode, int newMode);
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}
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}
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