private (ImageBindMode Mode, int Layer, EffectValue Effect, ImageDisplayInformation[] Images) AnalyseParameters(PluginExecuteContext context)
{
EffectValue effect = null;
var bind = ImageBindMode.None;
int? layer = null;
var images = new List <ImageDisplayInformation>();
ImageValue currentImage = null;
string currentName = null;
TransformValue currentTransform = null;
foreach (var(key, value) in context.Parameters)
{
switch (key)
{
case EffectValue effectValue:
effect = effectValue;
break;
case ImageValue imageValue:
if (currentImage != null)
{
AddImage(ref currentImage, ref currentName, ref currentTransform, images, context);
}
currentImage = imageValue;
currentTransform = new TransformValue();
break;
case IStringConverter stringConverter:
var name = stringConverter.ConvertToString(context.Language);
switch (name)
{
case "Layer":
layer = IntegerValue.TryParse(value);
break;
case "Name":
currentName = StringValue.TryParse(value);
break;
case "Effect":
effect = value is EffectValue effectValue ? effectValue : throw new ArgumentException($"Unable to create show command: effect {value} is not EffectValue");
break;
case "Transform":
currentTransform = (TransformValue)currentTransform.AddWith(value);
break;
case "Bind":
if (value is NullValue)
{
bind = ImageBindMode.Canvas;
}
else
{
switch (StringValue.TryParse(value))
{
case "Canvas":
case "Maximal":
case "Max":
bind = ImageBindMode.Canvas;
break;
case "Minimal":
case "Min":
bind = ImageBindMode.Minimal;
break;
}
}
break;
case "DefaultTransform":
_defaultTransform = value is TransformValue transformValue ? transformValue : throw new ArgumentException($"Unable to set show command default transform: target {value} is not TransformValue");
break;
case "DefaultLayer":
_defaultLayer = IntegerValue.TryParse(value);
break;
default:
TransformPlugin.AnalyzePropertyTo(name, value, currentTransform, context.Language);
break;
}
break;
}
}
if (currentImage != null)
{
AddImage(ref currentImage, ref currentName, ref currentTransform, images, context);
}
layer = layer ?? _defaultLayer;
var list = images.ToArray();
for (var i = -1; ++i < list.Length;)
{
list[i].layer = layer.Value;
list[i].status = ImageStatus.PrepareToShow;
}
return(bind, layer.Value, effect, list);
}
private void AddImage(ref ImageValue currentImage, ref string currentName, ref TransformValue currentTransform, List <ImageDisplayInformation> images, PluginExecuteContext context)
{
if (string.IsNullOrEmpty(currentName))
{
throw new MissingMemberException($"Unable to create show command: missing image name for {currentImage.ConvertToString(context.Language)}");
}
// ReSharper disable once AccessToModifiedClosure
var name = currentName;
var image = currentImage;
images.RemoveAll(e => e.Name == name || e.Content.EqualsWith(image, context.Language));
images.Add(new ImageDisplayInformation(currentName, currentImage, currentTransform == null ? null : (TransformValue)_defaultTransform.AddWith(currentTransform)));
currentName = null;
currentImage = null;
currentTransform = null;
}