/// <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>
/// 强制切换至某视图
/// </summary>
/// <param name="type">要切换至的视图类型</param>
/// <returns>是否成功切换</returns>
public bool ChangeToView(FileViewerType type)
{
if (this.FileViewers == null || this.FileViewers.Count == 0)
{
return(false);
}
IFileViewer ifv = this.FileViewers.Where(p => p.ViewerType == type).FirstOrDefault();
if (ifv != null && ifv is UIElement)
{
UIElement ui = ifv as UIElement;
foreach (UIElement element in this.FileViewers)
{
if (element != null && element != ui)
{
element.Visibility = System.Windows.Visibility.Collapsed;
}
}
ui.Visibility = System.Windows.Visibility.Visible;
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// 判断某个视图类型的某种扩展名是否支持
/// </summary>
/// <param name="type">视图类型</param>
/// <param name="extension">扩展名</param>
/// <returns></returns>
public bool IsSupport(FileViewerType type, string extension)
{
if (type == FileViewerType.None)
{
return(true);
}
if (extension.IsNullOrEmptyOrWhiteSpace())
{
return(false);
}
var q = from i in this.Items
from e in i.Extensions
where i.FileViewer == type && e.Extension.ToLower().Trim().Equals(extension.Trim().ToLower())
orderby e.Priority
select e;
return(q.Count() > 0);
}
