/// <summary>
/// Loads a list of .addin files, ensuring that dependencies are satisfied.
/// This method is normally called by <see cref="CoreStartup.RunInitialization"/>.
/// </summary>
/// <param name="addInFiles">
/// The list of .addin file names to load.
/// </param>
/// <param name="disabledAddIns">
/// The list of disabled AddIn identity names.
/// </param>
public void Load(List <string> addInFiles, List <string> disabledAddIns)
{
var list = new List <AddIn>();
var dict = new Dictionary <string, Version>();
var addInDict = new Dictionary <string, AddIn>();
var nameTable = new System.Xml.NameTable();
foreach (string fileName in addInFiles)
{
AddIn addIn;
try
{
addIn = AddIn.Load(this, fileName, nameTable);
}
catch (AddInLoadException ex)
{
Current.Log.Error(ex);
if (ex.InnerException != null)
{
MessageService.ShowError("Error loading AddIn " + fileName + ":\n"
+ ex.InnerException.Message);
}
else
{
MessageService.ShowError("Error loading AddIn " + fileName + ":\n"
+ ex.Message);
}
addIn = new AddIn(this)
{
addInFileName = fileName,
CustomErrorMessage = ex.Message
};
}
if (addIn.Action == AddInAction.CustomError)
{
list.Add(addIn);
continue;
}
addIn.Enabled = true;
if (disabledAddIns != null && disabledAddIns.Count > 0)
{
foreach (string name in addIn.Manifest.Identities.Keys)
{
if (disabledAddIns.Contains(name))
{
addIn.Enabled = false;
break;
}
}
}
if (addIn.Enabled)
{
foreach (KeyValuePair <string, Version> pair in addIn.Manifest.Identities)
{
if (dict.ContainsKey(pair.Key))
{
MessageService.ShowError("Name '" + pair.Key + "' is used by " +
"'" + addInDict[pair.Key].FileName + "' and '" + fileName + "'");
addIn.Enabled = false;
addIn.Action = AddInAction.InstalledTwice;
break;
}
else
{
dict.Add(pair.Key, pair.Value);
addInDict.Add(pair.Key, addIn);
}
}
}
list.Add(addIn);
}
checkDependencies:
for (int i = 0; i < list.Count; i++)
{
AddIn addIn = list[i];
if (!addIn.Enabled)
{
continue;
}
Version versionFound;
foreach (AddInReference reference in addIn.Manifest.Conflicts)
{
if (reference.Check(dict, out versionFound))
{
MessageService.ShowError(addIn.Name + " conflicts with " + reference.ToString()
+ " and has been disabled.");
DisableAddin(addIn, dict, addInDict);
goto checkDependencies; // after removing one addin, others could break
}
}
foreach (AddInReference reference in addIn.Manifest.Dependencies)
{
if (!reference.Check(dict, out versionFound))
{
if (versionFound != null)
{
MessageService.ShowError(addIn.Name + " has not been loaded because it requires "
+ reference.ToString() + ", but version "
+ versionFound.ToString() + " is installed.");
}
else
{
MessageService.ShowError(addIn.Name + " has not been loaded because it requires "
+ reference.ToString() + ".");
}
DisableAddin(addIn, dict, addInDict);
goto checkDependencies; // after removing one addin, others could break
}
}
}
foreach (AddIn addIn in list)
{
try
{
InsertAddIn(addIn);
}
catch (AddInLoadException ex)
{
Current.Log.Error(ex);
MessageService.ShowError("Error loading AddIn " + addIn.FileName + ":\n"
+ ex.Message);
}
}
}
public static ICondition Read(XmlReader reader, AddIn addIn)
{
return(new OrCondition(Condition.ReadConditionList(reader, "Or", addIn)));
}
public static ICondition Read(XmlReader reader, AddIn addIn)
{
return(new NegatedCondition(Condition.ReadConditionList(reader, "Not", addIn)[0]));
}
public static ICondition[] ReadConditionList(XmlReader reader, string endElement, AddIn addIn)
{
var conditions = new List <ICondition>();
while (reader.Read())
{
switch (reader.NodeType)
{
case XmlNodeType.EndElement:
if (reader.LocalName == endElement)
{
return(conditions.ToArray());
}
break;
case XmlNodeType.Element:
switch (reader.LocalName)
{
case "And":
conditions.Add(AndCondition.Read(reader, addIn));
break;
case "Or":
conditions.Add(OrCondition.Read(reader, addIn));
break;
case "Not":
conditions.Add(NegatedCondition.Read(reader, addIn));
break;
case "Condition":
conditions.Add(Condition.Read(reader, addIn));
break;
default:
throw new AddInLoadException("Invalid element name '" + reader.LocalName
+ "', entries in a <" + endElement + "> " +
"must be <And>, <Or>, <Not> or <Condition>");
}
break;
}
}
return(conditions.ToArray());
}
