/// <summary>
/// 应用新状态的修改
/// </summary>
/// <param name="newState">新状态</param>
/// <param name="changeType">状态变换种类</param>
/// <param name="isNeededKeyCheck"></param>
/// <returns>应用是否成功</returns>
protected bool Apply(MaskManagerState newState, StateChangeType changeType, bool isNeededKeyCheck)
{
if (!IsValid(newState))
{
return(false);
}
if (newState.IsSame(CurrentState))
{
return(false);
}
string editText = GetEditText(newState);
if (!isNeededKeyCheck)
{
if (GetCurrentEditText() != editText)
{
if (!RaiseEditTextChanging(editText))
{
return(false);
}
ApplyInternal(newState, changeType);
base.RaiseEditTextChanged();
}
else
{
ApplyInternal(newState, changeType);
}
}
return(true);
}
/// <summary>
/// 记录状态及状态变换类别
/// </summary>
/// <param name="newState"></param>
/// <param name="changeType"></param>
void ApplyInternal(MaskManagerState newState, StateChangeType changeType)
{
if (backupType != changeType)
{
if (changeType != StateChangeType.Terminator)
{
backupState = currentState;
}
backupType = changeType;
}
currentState = newState;
}
/// <summary>
/// 同步状态缓存
/// </summary>
void VerifyCache()
{
if (!object.ReferenceEquals(cachedDState, CurrentState))
{
cachedDState = CurrentState;
// 光标位置
cachedDCP = -1;
// 选中区域的起始位置
cachedDSA = -1;
// 显示文本
cachedDT = null;
}
}
/// <summary>
/// 撤消操作
/// </summary>
/// <returns></returns>
public override bool Undo()
{
if (!CanUndo)
{
return(false);
}
if (!RaiseEditTextChanging(GetEditText(backupState)))
{
return(false);
}
backupType = StateChangeType.Terminator;
MaskManagerState currentState = this.currentState;
currentState = backupState;
backupState = currentState;
base.RaiseEditTextChanged();
return(true);
}
/// <summary>
/// 根据给的掩码状态构造掩码员
/// </summary>
/// <param name="initialState"></param>
protected MaskManagerStated(MaskManagerState initialState)
{
SetInitialState(initialState);
}
/// <summary>
/// 是否有效
/// </summary>
/// <param name="newState"></param>
/// <returns></returns>
protected virtual bool IsValid(MaskManagerState newState)
{
return(true);
}
/// <summary> /// 选择区域的起始位置 /// </summary> /// <param name="state"></param> /// <returns></returns> protected abstract int GetSelectionAnchor(MaskManagerState state);
/// <summary> /// 获取给定掩码状态的显示文本 /// </summary> /// <param name="state"></param> /// <returns></returns> protected abstract string GetDisplayText(MaskManagerState state);
/// <summary> /// 根据掩码状态获取当前光标位置 /// </summary> /// <param name="state"></param> /// <returns></returns> protected abstract int GetCursorPosition(MaskManagerState state);
/// <summary> /// 根据掩码状态获取当前文本 /// </summary> /// <returns></returns> protected abstract string GetEditText(MaskManagerState state);
/// <summary> /// 根据掩码状态获取当前值 /// </summary> /// <returns></returns> protected abstract object GetEditValue(MaskManagerState state);
/// <summary>
/// 应用新状态的修改
/// </summary>
/// <param name="newState">新状态</param>
/// <param name="changeType">状态变换种类</param>
/// <returns>应用是否成功</returns>
protected bool Apply(MaskManagerState newState, StateChangeType changeType)
{
return(Apply(newState, changeType, false));
}
/// <summary>
/// 设置初始掩码状态
/// </summary>
/// <param name="newState"></param>
protected void SetInitialState(MaskManagerState newState)
{
backupState = null;
currentState = newState;
backupType = StateChangeType.Terminator;
}
/// <summary> /// 比较掩码状态是否和当前状态相同 /// </summary> /// <param name="comparedState">掩码状态实例</param> /// <returns></returns> public abstract bool IsSame(MaskManagerState comparedState);
/// <summary>
/// 比较掩码状态是否和当前状态相同
/// </summary>
/// <param name="comparedState">掩码状态实例</param>
/// <returns></returns>
public override bool IsSame(MaskManagerState comparedState)
{
return((base.IsSame(comparedState) && (this.IsNegative == ((NumericMaskManagerState)comparedState).IsNegative)) && (this.IsNull == ((NumericMaskManagerState)comparedState).IsNull));
}
