/// <summary>
/// 更新文内容选择状态
/// </summary>
/// <param name="startIndex">选择区域的起始位置</param>
/// <param name="length">选择区域的包含文档内容元素的个数</param>
/// <param name="raiseEvent">是否触发文档事件</param>
/// <returns>成功的改变了选择区域状态</returns>
internal bool Refresh(int startIndex, int length)
{
if (_NativeStartIndex == startIndex &&
_NativeLength == length &&
this.DocumentContent.OwnerDocument.ContentVersion == _ContentVersion &&
this.Content.LineEndFlag == _LineEndFlag)
{
return(false);
}
if (startIndex == 0 || startIndex + length == 0)
{
System.Console.Write("");
}
if (startIndex < 0)
{
System.Console.WriteLine("");
throw new ArgumentOutOfRangeException("startIndex=" + startIndex);
}
_SelectionVersion++;
this.Document.EditorCurrentStyle = null;
//if (startIndex == 872)
//{
// System.Console.WriteLine("");
//}
// 备份原先被选择的元素的列表
DomElementList contentElementsBack = _ContentElements.Clone();
_ContentElements = new DomElementList();
_ContentVersion = this.DocumentContent.OwnerDocument.ContentVersion;
if (startIndex == 0 && length == 0)
{
_NativeStartIndex = 0;
_NativeLength = 0;
_StartIndex = 0;
_Length = 0;
_LineEndFlag = this.Content.LineEndFlag;
this._Mode = ContentRangeMode.Content;
_ContentElements = new DomElementList();
//return true;
}
else
{
_NativeStartIndex = startIndex;
_NativeLength = length;
_LineEndFlag = this.Content.LineEndFlag;
DomContent content = this.Content;
_Mode = ContentRangeMode.Content;
// 选择区域经过的单元格列表
DomElementList spanElements = new DomElementList();
// 所经过的单元格个数
int cellCount = 0;
//XTextElementList spanCells = new XTextElementList();
// 是否有不包含在表格单元格中的文档内容元素
bool hasContentElement = false;
int absStartIndex = length > 0 ? startIndex : startIndex + length;
int absLength = Math.Abs(length);
int lengthFix = 1;
if (content.LineEndFlag && length < 0)
{
lengthFix = 0;
}
// 遍历所有的文档元素，查找所经过的单元格
for (int iCount = 0; iCount < absLength + lengthFix; iCount++)
{
if (absStartIndex + iCount >= content.Count)
{
break;
//System.Console.Write("");
}
DomElement element = content[absStartIndex + iCount];
if (element.Parent == this.DocumentContent)
{
spanElements.Add(element);
hasContentElement = true;
}
else
{
spanElements.Add(element);
hasContentElement = true;
}
}//for
// 首先判断内容模式
_Mode = ContentRangeMode.Content;
// 选择纯文档内容
_ContentElements = content.GetRange(absStartIndex, absLength);
_StartIndex = startIndex;
_Length = length;
if (length == 0 || _ContentElements.Count == 0)
{
_StartIndex = startIndex;
_Length = length;
}
else
{
if (length > 0)
{
_StartIndex = _ContentElements[0].ViewIndex;
_Length = _ContentElements.Count;
content.LineEndFlag = false;
}
else
{
_StartIndex = _ContentElements.LastElement.ViewIndex + 1;
_Length = 0 - _ContentElements.Count;
{
System.Console.Write("");
}
}
_LineEndFlag = content.LineEndFlag;
}
}//if
if (this.Mode == ContentRangeMode.Content || this.Mode == ContentRangeMode.Mixed)
{
// 让选择状态发生改变的文档内容元素用户界面无效，需要重新绘制
if (contentElementsBack != null && contentElementsBack.Count > 0)
{
foreach (DomElement element in contentElementsBack)
{
if (_ContentElements.Contains(element) == false)
{
element.InvalidateView();
}
}
}
if (_ContentElements.Count > 0)
{
foreach (DomElement element in _ContentElements)
{
if (contentElementsBack == null ||
contentElementsBack.Contains(element) == false)
{
element.InvalidateView();
}
}
}
}
if (this.StartIndex == -1)
{
System.Console.WriteLine("");
}
return(true);
}
