5MI/WorkingNote.java

// 包声明，定义了该类所在的包名
package net.micode.notes.model;

// 导入所需的Android类库
import android.appwidget.AppWidgetManager;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.text.TextUtils;
import android.util.Log;

// 导入项目中定义的数据表和列名
import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.CallNote;
import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.DataConstants;
import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.data.Notes.TextNote;
import net.micode.notes.tool.ResourceParser.NoteBgResources;

// 定义WorkingNote类，用于表示一个工作便签
public class WorkingNote {
    // Note对象，用于操作便签数据
    private Note mNote;
    // 便签ID
    private long mNoteId;
    // 便签内容
    private String mContent;
    // 便签模式
    private int mMode;

    // 便签提醒日期
    private long mAlertDate;

    // 便签修改日期
    private long mModifiedDate;

    // 便签背景颜色ID
    private int mBgColorId;

    // 小部件ID
    private int mWidgetId;

    // 小部件类型
    private int mWidgetType;

    // 便签所在文件夹ID
    private long mFolderId;

    // 上下文对象
    private Context mContext;

    // 日志标签
    private static final String TAG = "WorkingNote";

    // 是否被删除
    private boolean mIsDeleted;

    // 便签设置更改监听器
    private NoteSettingChangedListener mNoteSettingStatusListener;

    // 数据查询投影
    public static final String[] DATA_PROJECTION = new String[] {
            DataColumns.ID,
            DataColumns.CONTENT,
            DataColumns.MIME_TYPE,
            DataColumns.DATA1,
            DataColumns.DATA2,
            DataColumns.DATA3,
            DataColumns.DATA4,
    };

    // 便签查询投影
    public static final String[] NOTE_PROJECTION = new String[] {
            NoteColumns.PARENT_ID,
            NoteColumns.ALERTED_DATE,
            NoteColumns.BG_COLOR_ID,
            NoteColumns.WIDGET_ID,
            NoteColumns.WIDGET_TYPE,
            NoteColumns.MODIFIED_DATE
    };

    // 数据ID列索引
    private static final int DATA_ID_COLUMN = 0;

    // 数据内容列索引
    private static final int DATA_CONTENT_COLUMN = 1;

    // 数据MIME类型列索引
    private static final int DATA_MIME_TYPE_COLUMN = 2;

    // 数据模式列索引
    private static final int DATA_MODE_COLUMN = 3;

    // 便签父ID列索引
    private static final int NOTE_PARENT_ID_COLUMN = 0;

    // 便签提醒日期列索引
    private static final int NOTE_ALERTED_DATE_COLUMN = 1;

    // 便签背景颜色ID列索引
    private static final int NOTE_BG_COLOR_ID_COLUMN = 2;

    // 便签小部件ID列索引
    private static final int NOTE_WIDGET_ID_COLUMN = 3;

    // 便签小部件类型列索引
    private static final int NOTE_WIDGET_TYPE_COLUMN = 4;

    // 便签修改日期列索引
    private static final int NOTE_MODIFIED_DATE_COLUMN = 5;

    // 新建便签构造函数
    private WorkingNote(Context context, long folderId) {
        mContext = context;
        mAlertDate = 0;
        mModifiedDate = System.currentTimeMillis();
        mFolderId = folderId;
        mNote = new Note();
        mNoteId = 0;
        mIsDeleted = false;
        mMode = 0;
        mWidgetType = Notes.TYPE_WIDGET_INVALIDE;
    }

    // 现有便签构造函数
    private WorkingNote(Context context, long noteId, long folderId) {
        mContext = context;
        mNoteId = noteId;
        mFolderId = folderId;
        mIsDeleted = false;
        mNote = new Note();
        loadNote();
    }

    // 加载便签数据
    private void loadNote() {
        Cursor cursor = mContext.getContentResolver().query(
                ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mNoteId), NOTE_PROJECTION, null,
                null, null);

        if (cursor != null) {
            if (cursor.moveToFirst()) {
                mFolderId = cursor.getLong(NOTE_PARENT_ID_COLUMN);
                mBgColorId = cursor.getInt(NOTE_BG_COLOR_ID_COLUMN);
                mWidgetId = cursor.getInt(NOTE_WIDGET_ID_COLUMN);
                mWidgetType = cursor.getInt(NOTE_WIDGET_TYPE_COLUMN);
                mAlertDate = cursor.getLong(NOTE_ALERTED_DATE_COLUMN);
                mModifiedDate = cursor.getLong(NOTE_MODIFIED_DATE_COLUMN);
            }
            cursor.close();
        } else {
            Log.e(TAG, "No note with id:" + mNoteId);
            throw new IllegalArgumentException("Unable to find note with id " + mNoteId);
        }
        loadNoteData();
    }

    // 加载便签数据内容
    private void loadNoteData() {
        Cursor cursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI, DATA_PROJECTION,
                DataColumns.NOTE_ID + "=?", new String[] {
                    String.valueOf(mNoteId)
                }, null);

        if (cursor != null) {
            if (cursor.moveToFirst()) {
                do {
                    String type = cursor.getString(DATA_MIME_TYPE_COLUMN);
                    if (DataConstants.NOTE.equals(type)) {
                        mContent = cursor.getString(DATA_CONTENT_COLUMN);
                        mMode = cursor.getInt(DATA_MODE_COLUMN);
                        mNote.setTextDataId(cursor.getLong(DATA_ID_COLUMN));
                    } else if (DataConstants.CALL_NOTE.equals(type)) {
                        mNote.setCallDataId(cursor.getLong(DATA_ID_COLUMN));
                    } else {
                        Log.d(TAG, "Wrong note type with type:" + type);
                    }
                } while (cursor.moveToNext());
            }
            cursor.close();
        } else {
            Log.e(TAG, "No data with id:" + mNoteId);
            throw new IllegalArgumentException("Unable to find note's data with id " + mNoteId);
        }
    }

    // 创建空便签
    public static WorkingNote createEmptyNote(Context context, long folderId, int widgetId,
            int widgetType, int defaultBgColorId) {
        WorkingNote note = new WorkingNote(context, folderId);
        note.setBgColorId(defaultBgColorId);
        note.setWidgetId(widgetId);
        note.setWidgetType(widgetType);
        return note;
    }

    // 加载便签
    public static WorkingNote load(Context context, long id) {
        return new WorkingNote(context, id, 0);
    }

    // 保存便签
    public synchronized boolean saveNote() {
        if (isWorthSaving()) {
            if (!existInDatabase()) {
                if ((mNoteId = Note.getNewNoteId(mContext, mFolderId)) == 0) {
                    Log.e(TAG, "Create new note fail with id:" + mNoteId);
                    return false;
                }
            }

            mNote.syncNote(mContext, mNoteId);

            /**
             * Update widget content if there exist any widget of this note
             */
            if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID
                    && mWidgetType != Notes.TYPE_WIDGET_INVALIDE
                    && mNoteSettingStatusListener != null) {
                mNoteSettingStatusListener.onWidgetChanged();
            }
            return true;
        } else {
            return false;
        }
    }

    // 判断便签是否存在于数据库中
    public boolean existInDatabase() {
        return mNoteId > 0;
    }

    // 判断便签是否值得保存
    private boolean isWorthSaving() {
        if (mIsDeleted || (!existInDatabase() && TextUtils.isEmpty(mContent))
                || (existInDatabase() && !mNote.isLocalModified())) {
            return false;
        } else {
            return true;
        }
    }

    // 设置便签设置更改监听器
    public void setOnSettingStatusChangedListener(NoteSettingChangedListener l) {
        mNoteSettingStatusListener = l;
    }

    // 设置提醒日期
    public void setAlertDate(long date, boolean set) {
        if (date != mAlertDate) {
            mAlertDate = date;
            mNote.setNoteValue(NoteColumns.ALERTED_DATE, String.valueOf(mAlertDate));
        }
        if (mNoteSettingStatusListener != null) {
            mNoteSettingStatusListener.onClockAlertChanged(date, set);
        }
    }

    // 标记便签是否被删除
    public void markDeleted(boolean mark) {
        mIsDeleted = mark;
        if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID
                && mWidgetType != Notes.TYPE_WIDGET_INVALIDE && mNoteSettingStatusListener != null) {
                mNoteSettingStatusListener.onWidgetChanged();
        }
    }

    // 设置背景颜色ID
    public void setBgColorId(int id) {
        if (id != mBgColorId) {
            mBgColorId =id;
		if (mNoteSettingStatusListener != null) {
			mNoteSettingStatusListener.onBackgroundColorChanged();
		}
		mNote.setNoteValue(NoteColumns.BG_COLOR_ID, String.valueOf(id));
	}
}
// 设置检查列表模式
public void setCheckListMode(int mode) {
    if (mMode != mode) {
        if (mNoteSettingStatusListener != null) {
            mNoteSettingStatusListener.onCheckListModeChanged(mMode, mode);
        }
        mMode = mode;
        mNote.setTextData(TextNote.MODE, String.valueOf(mMode));
    }
}

// 设置小部件类型
public void setWidgetType(int type) {
    if (type != mWidgetType) {
        mWidgetType = type;
        mNote.setNoteValue(NoteColumns.WIDGET_TYPE, String.valueOf(mWidgetType));
    }
}

// 设置小部件ID
public void setWidgetId(int id) {
    if (id != mWidgetId) {
        mWidgetId = id;
        mNote.setNoteValue(NoteColumns.WIDGET_ID, String.valueOf(mWidgetId));
    }
}

// 设置工作文本
public void setWorkingText(String text) {
    if (!TextUtils.equals(mContent, text)) {
        mContent = text;
        mNote.setTextData(DataColumns.CONTENT, mContent);
    }
}

// 转换为通话便签
public void convertToCallNote(String phoneNumber, long callDate) {
    mNote.setCallData(CallNote.CALL_DATE, String.valueOf(callDate));
    mNote.setCallData(CallNote.PHONE_NUMBER, phoneNumber);
    mNote.setNoteValue(NoteColumns.PARENT_ID, String.valueOf(Notes.ID_CALL_RECORD_FOLDER));
}

// 判断是否有提醒闹钟
public boolean hasClockAlert() {
    return (mAlertDate > 0 ? true : false);
}

// 获取便签内容
public String getContent() {
    return mContent;
}

// 获取提醒日期
public long getAlertDate() {
    return mAlertDate;
}

// 获取修改日期
public long getModifiedDate() {
    return mModifiedDate;
}

// 获取背景颜色资源ID
public int getBgColorResId() {
    return NoteBgResources.getNoteBgResource(mBgColorId);
}

// 获取背景颜色ID
public int getBgColorId() {
    return mBgColorId;
}

// 获取标题背景资源ID
public int getTitleBgResId() {
    return NoteBgResources.getNoteTitleBgResource(mBgColorId);
}

// 获取检查列表模式
public int getCheckListMode() {
    return mMode;
}

// 获取便签ID
public long getNoteId() {
    return mNoteId;
}

// 获取便签所在文件夹ID
public long getFolderId() {
    return mFolderId;
}

// 获取小部件ID
public int getWidgetId() {
    return mWidgetId;
}

// 获取小部件类型
public int getWidgetType() {
    return mWidgetType;
}

// 定义便签设置更改监听器接口
public interface NoteSettingChangedListener {
    /**
     * Called when the background color of current note has just changed
     */
    void onBackgroundColorChanged();

    /**
     * Called when user set clock
     */
    void onClockAlertChanged(long date, boolean set);

    /**
     * Call when user create note from widget
     */
    void onWidgetChanged();

    /**
     * Call when switch between check list mode and normal mode
     * @param oldMode is previous mode before change
     * @param newMode is new mode
     */
    void onCheckListModeChanged(int oldMode, int newMode);
}