public bool OpenDocument(string fileName)
{
// 如果文件不存在，则退出；
if (!File.Exists(fileName))
{
return(false);
}
// 2、判断当前文件是否已经打开，如果已经打开，则将其状态置为Active；
DocumentViewModel model = this.GetDocModel(fileName);
if (model != null)
{
model.IsSelected = true;
model.IsActive = true;
return(true);
}
// 3、目标文档未打开，则获取对应的工厂实例，并创建相关视图对象；
IViEditorFactory factory = this.GetEditorFactory(fileName);
if (factory == null)
{
return(false);
}
IViEditor editor = factory.CreateEditorInstance();
// 4、加载相关数据；
editor.Load(fileName);
this.AddDocModel(new DocumentViewModel(editor, this));
return(true);
}
/// <summary>
/// 根据扩展名获取对应的 EditorFactory；
/// </summary>
private IViEditorFactory GetEditorFactory(String extention)
{
extention = Path.GetExtension(extention);
if (String.IsNullOrEmpty(extention))
{
return(null);
}
String key = extention.ToUpper();
// 如果已经有，则直接返回；
IViEditorFactory factory = this.DEditorFactorys.ContainsKey(key) ? this.DEditorFactorys[key] : null;
if (factory != null)
{
return(factory);
}
factory = ViShellManager.GetEditorFactory(key);
if (factory != null)
{
this.DEditorFactorys[key] = factory;
}
return(factory);
}
/// <summary>
/// 根据给定的扩展名，获取目标编辑器工厂实例；
/// </summary>
public static IViEditorFactory GetEditorFactory(String extention)
{
if (String.IsNullOrEmpty(extention))
return null;
String key = extention.ToUpper();
Type factoryType = DFactoryTypes.ContainsKey(key) ? DFactoryTypes[key] : null;
if (factoryType == null)
return null;
try
{
IViEditorFactory factory = DEditorFactorys.ContainsKey(factoryType) ? DEditorFactorys[factoryType] : null;
if (factory == null)
{
factory = Activator.CreateInstance(factoryType) as IViEditorFactory;
DEditorFactorys[factoryType] = factory;
}
return factory;
}
catch (Exception ee)
{
return null;
}
}