static NSExpression ToExpression(NSArray array)
{
var objects = SubArray(array, 0);
var @operator = objects[0].ToString();
var arguments = SubArray(objects, 1);
if (OperatorMap.TryGetValue(@operator, out var functionName))
{
var subexpressions = ToSubexpressions(arguments);
switch (functionName)
{
case "+":
if (subexpressions.Count > 2)
{
var sumArguments = NSExpression.FromAggregate(subexpressions.ToArray());
return(NSExpression.FromFunction("sum:", new[] { sumArguments }));
}
break;
case "^":
if (arguments[0].ToString() == "e")
{
functionName = @"exp:";
subexpressions = SubArray(subexpressions, 1);
}
break;
default:
break;
}
return(NSExpression.FromFunction(functionName, subexpressions.ToArray()));
}
else
{
switch (@operator)
{
case "collator":
return(NSExpression.FromFunction("MGL_FUNCTION", ToSubexpressions(objects).ToArray()));
case "literal":
if (arguments[0] is NSArray literalArray)
{
return(NSExpression.FromConstant(literalArray));
// WARNING This may be wrong
//var expressions = ToSubexpressions(SubArray(literalArray, 0));
//return NSExpression.FromAggregate(expressions.ToArray());
}
return(ToExpression(arguments[0]));
case "to-boolean": {
var operand = ToExpression(arguments[0]);
return(NSExpression.FromFunction(operand, "boolValue", new NSExpression[0]));
}
case "to-number":
case "number": {
var operand = ToExpression(arguments[0]);
if (arguments.Count == 1)
{
if (arguments[0] is NSNumber number)
{
return(NSExpression.FromFormat("%@", new NSObject[] { arguments[0] }));
}
return(NSExpression.FromFormat("CAST(%@, 'NSNumber')", new NSObject[] { operand }));
}
else
{
var innerArguments = SubArray(arguments, 1);
return(NSExpression.FromFunction(operand, "mgl_numberWithFallbackValues",
ToSubexpressions(innerArguments).ToArray()));
}
}
case "to-string":
case "string": {
var operand = ToExpression(arguments[0]);
return(NSExpression.FromFormat("CAST(%@, 'NSString')", new NSObject[] { operand }));
}
case "to-color":
case "color": {
var operand = ToExpression(arguments[0]);
if (arguments.Count == 1)
{
#if __IOS__
return(NSExpression.FromFormat("CAST(%@, 'UIColor')", new NSObject[] { operand }));
#else
return(NSExpression.FromFormat("CAST(%@, 'NSColor')", new NSObject[] { operand }));
#endif
}
return(NSExpression.FromFunction("MGL_FUNCTION", ToSubexpressions(objects).ToArray()));
}
case "to-rgba": {
var operand = ToExpression(arguments[0]);
return(NSExpression.FromFormat("CAST(noindex(%@), 'NSArray')", new NSObject[] { operand }));
}
case "get": {
if (arguments.Count == 2)
{
var operand = ToExpression(arguments[arguments.Count - 1]);
if (arguments[0] is NSString value)
{
return(NSExpression.FromFormat("%@.%K", new NSObject[] { operand, value }));
}
var keyExpression = ToExpression(arguments[0]);
return(NSExpression.FromFormat("%@.%@", new NSObject[] { operand, keyExpression }));
}
return(NSExpression.FromKeyPath(arguments[0].ToString()));
}
case "length": {
var subexpressions = ToSubexpressions(arguments);
var function = @"count:";
if (subexpressions[0].ExpressionType == NSExpressionType.ConstantValue &&
subexpressions[0].ConstantValue is NSString value)
{
function = "length:";
}
return(NSExpression.FromFunction(function, new NSExpression[] { subexpressions[0] }));
}
;
case "rgb": {
var subexpressions = ToSubexpressions(arguments);
return(UIColorAdditions.FromRgb(subexpressions.ToArray()));
}
case "rgba": {
var subexpressions = ToSubexpressions(arguments);
return(UIColorAdditions.FromRgba(subexpressions.ToArray()));
}
case "min":
case "max": {
var subexpressions = ToSubexpressions(arguments);
var subexpression = NSExpression.FromAggregate(subexpressions.ToArray());
return(NSExpression.FromFunction(@operator, new[] { subexpression }));
}
case "e": {
return(NSExpression.FromConstant(NSNumber.FromDouble(Math.E)));
}
case "pi": {
return(NSExpression.FromConstant(NSNumber.FromDouble(Math.PI)));
}
case "concat": {
var subexpressions = ToSubexpressions(arguments);
var subexpression = NSExpression.FromAggregate(subexpressions.ToArray());
return(NSExpression.FromFunction("mgl_join:", new[] { subexpression }));
}
case "at": {
var subexpressions = ToSubexpressions(arguments);
return(NSExpression.FromFunction("objectFrom:withIndex:",
new[] { subexpressions[1], subexpressions[0] }));
}
case "has": {
var subexpressions = ToSubexpressions(arguments);
var operand = subexpressions.Count > 1
? subexpressions[1]
: NSExpression.ExpressionForEvaluatedObject;
var key = subexpressions[0];
return(NSExpression.FromFunction("mgl_does:have:", new[] { operand, key }));
}
case "interpolate": {
var firstObject = arguments[0];
if (firstObject is NSArray == false)
{
return(null);
}
var interpolationOptions = SubArray((NSArray)firstObject);
var curveType = interpolationOptions[0].ToString();
var curveTypeExpression = ToExpression(interpolationOptions[0]);
NSObject curveParameters;
switch (curveType)
{
case "linear": {
var temp = new NSMutableArray(2);
temp.Add((NSString)"literal");
temp.Add(NSNumber.FromDouble(1.0));
curveParameters = temp.Copy();
temp.Dispose();
break;
}
case "exponential":
curveParameters = interpolationOptions[1];
break;
case "cubic-bezier": {
var temp = new NSMutableArray(5);
temp.Add((NSString)"literal");
temp.Add(interpolationOptions[1]);
temp.Add(interpolationOptions[2]);
temp.Add(interpolationOptions[3]);
temp.Add(interpolationOptions[4]);
curveParameters = temp.Copy();
temp.Dispose();
break;
}
default:
curveParameters = NSNull.Null;
break;
}
var curveParameterExpression = ToExpression(curveParameters);
arguments = SubArray(arguments, 1);
var inputExpression = ToExpression(arguments[0]);
var stopExpressions = SubArray(arguments, 1);
var stops = new NSMutableDictionary();
for (int i = 0; i < stopExpressions.Count; i++)
{
var keyExpression = stopExpressions[i++];
var valueExpression = ToExpression(stopExpressions[i]);
stops[keyExpression] = valueExpression;
}
var stopExpression = NSExpression.FromConstant(stops);
return(NSExpression.FromFunction("mgl_interpolate:withCurveType:parameters:stops:", new[]
{
inputExpression,
curveTypeExpression,
curveParameterExpression,
stopExpression
}));
}
case "step": {
var inputExpression = ToExpression(arguments[0]);
var stopExpressions = SubArray(arguments, 1);
NSExpression miniumExpression = null;
if (stopExpressions.Count % 2 == 1)
{
miniumExpression = ToExpression(stopExpressions[0]);
stopExpressions = SubArray(stopExpressions, 1);
}
var stops = new NSMutableDictionary();
for (int i = 0; i < stopExpressions.Count; i++)
{
var keyExpression = stopExpressions[i++];
var valueExpression = ToExpression(stopExpressions[i]);
if (miniumExpression == null)
{
miniumExpression = valueExpression;
continue;
}
stops[keyExpression] = valueExpression;
}
if (miniumExpression == null)
{
return(null);
}
var stopExpression = NSExpression.FromConstant(stops);
return(NSExpression.FromFunction("mgl_step:from:stops:", new[]
{
inputExpression,
miniumExpression,
stopExpression
}));
}
case "zoom": {
return(NSExpression_MGLAdditions.ZoomLevelVariableExpression(null));
}
case "heatmap-density": {
return(NSExpression_MGLAdditions.HeatmapDensityVariableExpression(null));
}
case "line-progress": {
return(NSExpression_MGLAdditions.LineProgressVariableExpression(null));
}
case "geometry-type": {
return(NSExpression_MGLAdditions.GeometryTypeVariableExpression(null));
}
case "id": {
return(NSExpression_MGLAdditions.FeatureIdentifierVariableExpression(null));
}
case "properties": {
return(NSExpression_MGLAdditions.FeatureAttributesVariableExpression(null));
}
case "var": {
return(NSExpression.FromVariable(arguments[0].ToString()));
}
case "case": {
var args = new NSMutableArray();
for (int i = 0; i < arguments.Count; i++)
{
if (i % 2 == 0 & i != arguments.Count - 1)
{
var predicate = ToPredicate(arguments[i]);
var arg = NSExpression.FromConstant(predicate);
args.Add(arg);
}
else
{
args.Add(ToExpression(arguments[i]));
}
}
if (args.Count == 3)
{
return(NSExpression.FromConditional(
(NSPredicate)ObjCRuntime.Runtime.GetNSObject <NSExpression>(args.ValueAt(0))
.ConstantValue,
ObjCRuntime.Runtime.GetNSObject <NSExpression>(args.ValueAt(1)),
ObjCRuntime.Runtime.GetNSObject <NSExpression>(args.ValueAt(2))));
}
return(NSExpression.FromFunction("MGL_IF",
NSArray.FromArray <NSExpression>((NSArray)args.Copy())));
}
case "match": {
var optionsArray = new NSMutableArray();
for (int i = 0; i < arguments.Count; i++)
{
NSExpression option = ToExpression(arguments[i]);
if (i > 0 && i < arguments.Count - 1 && !(i % 2 == 0) && arguments[i] is NSArray sub)
{
option = NSExpression.FromAggregate(ToSubexpressions(SubArray(sub)).ToArray());
}
optionsArray.Add(option);
}
return(NSExpression.FromFunction("MGL_MATCH",
NSArray.FromArray <NSExpression>((NSArray)optionsArray.Copy())));
}
case "format": {
var attributedExpressions = new List <NSExpression>();
for (int i = 0; i < arguments.Count; i += 2)
{
var expression = ToExpression(arguments[i]);
var attrs = new NSMutableDictionary();
if (i + 1 < arguments.Count)
{
attrs = NSMutableDictionary.FromDictionary(arguments[i + 1] as NSDictionary);
}
foreach (var key in attrs.Keys)
{
attrs[key] = ToExpression(attrs[key]);
}
var attributedExpression = new MGLAttributedExpression(expression, attrs);
attributedExpressions.Add(NSExpression.FromConstant(attributedExpression));
}
return(NSExpression.FromFunction("mgl_attributed:", attributedExpressions.ToArray()));
}
case "coalesce": {
var subexpressions = ToSubexpressions(arguments);
return(NSExpression.FromFormat("mgl_coalesce(%@)", subexpressions.ToArray()));
}
default: {
var subexpressions = ToSubexpressions(objects);
return(NSExpression.FromFunction(@"MGL_FUNCTION", subexpressions.ToArray()));
}
}
}
}
