/// <summary>
/// 根据后缀选择最佳视图，并且切换至最佳视图
/// </summary>
/// <param name="extension">要切换的后缀</param>
/// <param name="argsType">打开方式</param>
private IFileViewer _Open(string extension, FileViewerArgsType argsType)
{
if (this.FileViewers == null || this.FileViewers.Count == 0)
{
return(null);
}
FileViewerType type = FileViewerConfig.Config.BestSupport(extension, argsType, this.FileViewers.Select(p => p.ViewerType).ToArray());
IFileViewer viewer = this.FileViewers.Where(p => p.ViewerType == type).FirstOrDefault();
foreach (UIElement ui in this.FileViewers)
{
if (ui == null)
{
continue;
}
if (ui == viewer)
{
ui.Visibility = System.Windows.Visibility.Visible;
IFileViewer ifv = ui as IFileViewer;
}
else
{
ui.Visibility = System.Windows.Visibility.Collapsed;
}
}
this.CurrentFileViewer = viewer;
return(viewer);
}
/// <summary>
/// 最佳支持的视图（根据视图支持优先级确定）
/// </summary>
/// <param name="extension">扩展名</param>
/// <param name="type">打开方式</param>
/// <returns></returns>
public FileViewerType BestSupport(string extension, FileViewerArgsType type)
{
if (extension.IsNullOrEmptyOrWhiteSpace())
{
return(FileViewerType.None);
}
var q = from i in this.Items
from e in i.Extensions
where e.Extension.ToLower().Trim().Equals(extension.Trim().ToLower()) &&
(((type == FileViewerArgsType.Stream || type == FileViewerArgsType.Buffer) && i.IsSupportStream) || type == FileViewerArgsType.Path)
orderby e.Priority
select i.FileViewer;
if (q.Count() == 0)
{
if (!extension.IsNullOrEmptyOrWhiteSpace() && type == FileViewerArgsType.Path)
{
return(FileViewerType.Hex);
}
else
{
return(FileViewerType.None);
}
}
else
{
return(q.First());
}
}
