public static bool AddInjection(Type windowType, DrawInjectedContents callback, string injectionId, InjectMode mode = InjectMode.AfterContents, bool errorOnFail = true)
{
if (windowType == null || !typeof(Window).IsAssignableFrom(windowType))
{
if (errorOnFail)
{
throw new Exception("windowType must be a descendant of Verse.Window");
}
return(false);
}
if (callback == null)
{
if (errorOnFail)
{
throw new Exception("callback cannot be null");
}
return(false);
}
if (injectionId.NullOrEmpty())
{
if (errorOnFail)
{
throw new Exception("injectionId must be a valid string");
}
return(false);
}
if (windowInjections.ContainsKey(injectionId))
{
if (errorOnFail)
{
throw new Exception(string.Format("Cannot add window injection with id {0}, injection with his id already exists", injectionId));
}
return(false);
}
var injection = new ActiveWindowInjection(injectionId, windowType, mode, callback);
windowInjections.Add(injectionId, injection);
ActivateInjection(injection);
return(true);
}
// adds the injection to one of the sets, allowing it to be called
private static void ActivateInjection(ActiveWindowInjection injection)
{
WindowInjectionSet set;
injectionSets.TryGetValue(injection.windowType, out set);
if (set == null)
{
set = new WindowInjectionSet();
injectionSets.Add(injection.windowType, set);
}
switch (injection.mode)
{
case InjectMode.BeforeContents:
if (set.beforeContents == null)
{
set.beforeContents = new List <DrawInjectedContents>();
}
set.beforeContents.Add(injection.callback);
break;
case InjectMode.AfterContents:
if (set.afterContents == null)
{
set.afterContents = new List <DrawInjectedContents>();
}
set.afterContents.Add(injection.callback);
break;
case InjectMode.ReplaceContents:
if (set.replaceContents == null)
{
set.replaceContents = new List <DrawInjectedContents>();
}
set.replaceContents.Add(injection.callback);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
// removes the injection from its set, which will prevent it from being called
private static void DeactivateInjection(ActiveWindowInjection injection)
{
WindowInjectionSet set;
injectionSets.TryGetValue(injection.windowType, out set);
if (set == null)
{
return;
}
if (set.beforeContents != null)
{
set.beforeContents.Remove(injection.callback);
if (set.beforeContents.Count == 0)
{
set.beforeContents = null;
}
}
if (set.afterContents != null)
{
set.afterContents.Remove(injection.callback);
if (set.afterContents.Count == 0)
{
set.afterContents = null;
}
}
if (set.replaceContents != null)
{
set.replaceContents.Remove(injection.callback);
if (set.replaceContents.Count == 0)
{
set.replaceContents = null;
}
}
if (set.beforeContents == null && set.afterContents == null && set.replaceContents == null)
{
injectionSets.Remove(injection.windowType);
}
}