public object GetPropertyValue(Type matchedType, TDependencyObject targetObject, string valueExpression, TDependencyProperty property)
{
object propertyValue;
if (valueExpression != null &&
((valueExpression.StartsWith("#", StringComparison.Ordinal) && !IsHexColorValue(valueExpression)) ||
valueExpression.StartsWith("{", StringComparison.Ordinal))) // color
{
if (valueExpression.StartsWith("#"))
{
valueExpression = "{" + valueExpression.Substring(1) + "}";
}
propertyValue = markupExpressionParser.ProvideValue(valueExpression, targetObject);
}
else
{
propertyValue = dependencyPropertyService.GetBindablePropertyValue(matchedType, property, valueExpression);
}
return(propertyValue);
}
public override BindableObject CreateTrigger(StyleSheet styleSheet, ITrigger trigger, Type targetType, BindableObject styleResourceReferenceHolder)
{
if (trigger == null)
{
throw new ArgumentNullException(nameof(trigger));
}
if (trigger is Trigger)
{
var propertyTrigger = trigger as Trigger;
var nativeTrigger = new Xamarin.Forms.Trigger(targetType);
var bindableProperty = dependencyService.GetBindableProperty(targetType, propertyTrigger.Property);
if (bindableProperty == null)
{
throw new NullReferenceException($"Property '{propertyTrigger.Property}' may not be null (targetType '{targetType.Name}')!");
}
nativeTrigger.Property = bindableProperty;
nativeTrigger.Value = dependencyService.GetBindablePropertyValue(targetType, nativeTrigger.Property, propertyTrigger.Value);
foreach (var styleDeclaration in propertyTrigger.StyleDeclarationBlock)
{
var property = typeNameResolver.GetDependencyProperty(styleSheet.Namespaces, targetType, styleDeclaration.Property);
if (property == null)
{
continue;
}
try
{
var value = typeNameResolver.GetPropertyValue(targetType, styleResourceReferenceHolder, styleDeclaration.Value, property, styleSheet.Namespaces);
nativeTrigger.Setters.Add(new Setter {
Property = property, Value = value
});
}
catch (Exception e)
{
styleSheet.Errors.Add($@"ERROR in property trigger ""{propertyTrigger.Property} {propertyTrigger.Value} - {styleDeclaration.Property}: {styleDeclaration.Value}"": {e.Message}");
}
}
foreach (var action in propertyTrigger.EnterActions)
{
try
{
var nativeTriggerAction = CreateTriggerAction(styleSheet, styleResourceReferenceHolder, action);
nativeTrigger.EnterActions.Add(nativeTriggerAction);
}
catch (Exception e)
{
styleSheet.Errors.Add($@"ERROR in property trigger ""{propertyTrigger.Property} {propertyTrigger.Value}"" enter action: {e.Message}");
}
}
foreach (var action in propertyTrigger.ExitActions)
{
try
{
var nativeTriggerAction = CreateTriggerAction(styleSheet, styleResourceReferenceHolder, action);
nativeTrigger.ExitActions.Add(nativeTriggerAction);
}
catch (Exception e)
{
styleSheet.Errors.Add($@"ERROR in property trigger ""{propertyTrigger.Property} {propertyTrigger.Value}"" exit action: {e.Message}");
}
}
return(nativeTrigger);
}
else if (trigger is DataTrigger)
{
var dataTrigger = trigger as DataTrigger;
var nativeTrigger = new Xamarin.Forms.DataTrigger(targetType);
var expression = "{Binding " + dataTrigger.Binding + "}";
var binding = (Binding)markupExtensionParser.ProvideValue(expression, null, styleSheet.Namespaces);
nativeTrigger.Binding = binding;
nativeTrigger.Value = GetBasicValue(dataTrigger);
foreach (var styleDeclaration in dataTrigger.StyleDeclarationBlock)
{
try
{
var property = typeNameResolver.GetDependencyProperty(styleSheet.Namespaces, targetType, styleDeclaration.Property);
if (property == null)
{
continue;
}
var value = typeNameResolver.GetPropertyValue(targetType, styleResourceReferenceHolder, styleDeclaration.Value, property, styleSheet.Namespaces);
nativeTrigger.Setters.Add(new Setter {
Property = property, Value = value
});
}
catch (Exception e)
{
styleSheet.Errors.Add($@"ERROR in data trigger ""{dataTrigger.Binding} {dataTrigger.Value} - {styleDeclaration.Property}: {styleDeclaration.Value}"": {e.Message}");
}
}
foreach (var action in dataTrigger.EnterActions)
{
try
{
var nativeTriggerAction = CreateTriggerAction(styleSheet, styleResourceReferenceHolder, action);
nativeTrigger.EnterActions.Add(nativeTriggerAction);
}
catch (Exception e)
{
styleSheet.Errors.Add($@"ERROR in data trigger ""{dataTrigger.Binding} {dataTrigger.Value} - {action}"" enter action: {e.Message}");
}
}
foreach (var action in dataTrigger.ExitActions)
{
try
{
var nativeTriggerAction = CreateTriggerAction(styleSheet, styleResourceReferenceHolder, action);
nativeTrigger.ExitActions.Add(nativeTriggerAction);
}
catch (Exception e)
{
styleSheet.Errors.Add($@"ERROR in data trigger ""{dataTrigger.Binding} {dataTrigger.Value} - {action}"" exit action: {e.Message}");
}
}
return(nativeTrigger);
}
else if (trigger is EventTrigger)
{
var eventTrigger = trigger as EventTrigger;
var nativeTrigger = new Xamarin.Forms.EventTrigger();
nativeTrigger.Event = eventTrigger.Event;
foreach (var action in eventTrigger.Actions)
{
try
{
var nativeTriggerAction = CreateTriggerAction(styleSheet, styleResourceReferenceHolder, action);
nativeTrigger.Actions.Add(nativeTriggerAction);
}
catch (Exception e)
{
styleSheet.Errors.Add($@"ERROR in event trigger ""{eventTrigger.Event} {action.Action}"": {e.Message}");
}
}
return(nativeTrigger);
}
throw new NotSupportedException($"Trigger '{trigger.GetType().FullName}' is not supported!");
}
public override DependencyObject CreateTrigger(StyleSheet styleSheet, ITrigger trigger, Type targetType, DependencyObject styleResourceReferenceHolder)
{
if (trigger == null)
{
throw new ArgumentNullException(nameof(trigger));
}
if (trigger is Trigger)
{
var propertyTrigger = trigger as Trigger;
var nativeTrigger = new System.Windows.Trigger();
var dependencyProperty = dependencyService.GetBindableProperty(targetType, propertyTrigger.Property);
if (dependencyProperty == null)
{
throw new NullReferenceException($"Property '{propertyTrigger.Property}' may not be null (targetType '{targetType.Name}')!");
}
nativeTrigger.Property = dependencyProperty;
nativeTrigger.Value = dependencyService.GetBindablePropertyValue(targetType, nativeTrigger.Property, propertyTrigger.Value);
foreach (var styleDeclaration in propertyTrigger.StyleDeclarationBlock)
{
var property = typeNameResolver.GetDependencyProperty(styleSheet.Namespaces, targetType, styleDeclaration.Property);
if (property == null)
{
continue;
}
try
{
var value = typeNameResolver.GetPropertyValue(targetType, styleResourceReferenceHolder, styleDeclaration.Value, property, styleSheet.Namespaces);
if (value is string valueString)
{
value = TypeDescriptor.GetConverter(property.PropertyType)?.ConvertFromInvariantString(valueString) ?? value;
}
nativeTrigger.Setters.Add(new Setter {
Property = property, Value = value
});
}
catch (Exception e)
{
styleSheet.Errors.Add($@"ERROR in property trigger ""{propertyTrigger.Property} {propertyTrigger.Value} - {styleDeclaration.Property}: {styleDeclaration.Value}"": {e.Message}");
}
}
foreach (var action in propertyTrigger.EnterActions)
{
try
{
var nativeTriggerAction = CreateTriggerAction(styleSheet, styleResourceReferenceHolder, action);
nativeTrigger.EnterActions.Add(nativeTriggerAction);
}
catch (Exception e)
{
styleSheet.Errors.Add($@"ERROR in property trigger ""{propertyTrigger.Property} {propertyTrigger.Value}"" enter action: {e.Message}");
}
}
foreach (var action in propertyTrigger.ExitActions)
{
try
{
var nativeTriggerAction = CreateTriggerAction(styleSheet, styleResourceReferenceHolder, action);
nativeTrigger.ExitActions.Add(nativeTriggerAction);
}
catch (Exception e)
{
styleSheet.Errors.Add($@"ERROR in property trigger ""{propertyTrigger.Property} {propertyTrigger.Value}"" exit action: {e.Message}");
}
}
return(nativeTrigger);
}
else if (trigger is DataTrigger)
{
var dataTrigger = trigger as DataTrigger;
var nativeTrigger = new System.Windows.DataTrigger();
var expression = "{Binding " + dataTrigger.Binding + "}";
var binding = (System.Windows.Data.BindingBase)markupExtensionParser.ProvideValue(expression, null, styleSheet.Namespaces);
nativeTrigger.Binding = binding;
nativeTrigger.Value = GetBasicValue(dataTrigger);
foreach (var styleDeclaration in dataTrigger.StyleDeclarationBlock)
{
try
{
var property = typeNameResolver.GetDependencyProperty(styleSheet.Namespaces, targetType, styleDeclaration.Property);
if (property == null)
{
continue;
}
var value = typeNameResolver.GetPropertyValue(targetType, styleResourceReferenceHolder, styleDeclaration.Value, property, styleSheet.Namespaces);
if (value is string valueString)
{
value = TypeDescriptor.GetConverter(property.PropertyType)?.ConvertFromInvariantString(valueString) ?? value;
}
nativeTrigger.Setters.Add(new Setter {
Property = property, Value = value
});
}
catch (Exception e)
{
styleSheet.Errors.Add($@"ERROR in data trigger ""{dataTrigger.Binding} {dataTrigger.Value} - {styleDeclaration.Property}: {styleDeclaration.Value}"": {e.Message}");
}
}
foreach (var action in dataTrigger.EnterActions)
{
try
{
var nativeTriggerAction = CreateTriggerAction(styleSheet, styleResourceReferenceHolder, action);
nativeTrigger.EnterActions.Add(nativeTriggerAction);
}
catch (Exception e)
{
styleSheet.Errors.Add($@"ERROR in data trigger ""{dataTrigger.Binding} {dataTrigger.Value} - {action}"" enter action: {e.Message}");
}
}
foreach (var action in dataTrigger.ExitActions)
{
try
{
var nativeTriggerAction = CreateTriggerAction(styleSheet, styleResourceReferenceHolder, action);
nativeTrigger.ExitActions.Add(nativeTriggerAction);
}
catch (Exception e)
{
styleSheet.Errors.Add($@"ERROR in data trigger ""{dataTrigger.Binding} {dataTrigger.Value} - {action}"" exit action: {e.Message}");
}
}
return(nativeTrigger);
}
else if (trigger is EventTrigger)
{
var eventTrigger = trigger as EventTrigger;
var nativeTrigger = new System.Windows.EventTrigger();
var fieldInfo = targetType.GetField(eventTrigger.Event + "Event", BindingFlags.Static | BindingFlags.Public | BindingFlags.FlattenHierarchy);
nativeTrigger.RoutedEvent = (RoutedEvent)fieldInfo.GetValue(null);
foreach (var action in eventTrigger.Actions)
{
try
{
var nativeTriggerAction = CreateTriggerAction(styleSheet, styleResourceReferenceHolder, action);
nativeTrigger.Actions.Add(nativeTriggerAction);
}
catch (Exception e)
{
styleSheet.Errors.Add($@"ERROR in event trigger ""{eventTrigger.Event} {action.Action}"": {e.Message}");
}
}
return(nativeTrigger);
}
throw new NotSupportedException($"Trigger '{trigger.GetType().FullName}' is not supported!");
}
public override DependencyObject CreateTrigger(StyleSheet styleSheet, ITrigger trigger, Type targetType, DependencyObject styleResourceReferenceHolder)
{
if (trigger == null)
{
throw new ArgumentNullException(nameof(trigger));
}
if (trigger is Trigger)
{
var propertyTrigger = trigger as Trigger;
var nativeTrigger = new System.Windows.Trigger();
var dependencyProperty = dependencyService.GetBindableProperty(targetType, propertyTrigger.Property);
if (dependencyProperty == null)
{
throw new NullReferenceException($"Property '{propertyTrigger.Property}' may not be null (targetType '{targetType.Name}')!");
}
nativeTrigger.Property = dependencyProperty;
nativeTrigger.Value = dependencyService.GetBindablePropertyValue(targetType, nativeTrigger.Property, propertyTrigger.Value);
foreach (var styleDeclaration in propertyTrigger.StyleDeclaraionBlock)
{
var property = typeNameResolver.GetDependencyProperty(styleSheet.Namespaces, targetType, styleDeclaration.Property);
if (property == null)
{
continue;
}
var value = typeNameResolver.GetPropertyValue(targetType, styleResourceReferenceHolder, styleDeclaration.Value, property);
if (value is string valueString)
{
value = TypeDescriptor.GetConverter(property.PropertyType)?.ConvertFromInvariantString(valueString) ?? value;
}
nativeTrigger.Setters.Add(new Setter {
Property = property, Value = value
});
}
return(nativeTrigger);
}
else if (trigger is DataTrigger)
{
var dataTrigger = trigger as DataTrigger;
var nativeTrigger = new System.Windows.DataTrigger();
var expression = "{Binding " + dataTrigger.Binding + "}";
var binding = (System.Windows.Data.BindingBase)markupExtensionParser.ProvideValue(expression, null);
nativeTrigger.Binding = binding;
nativeTrigger.Value = GetBasicValue(dataTrigger);
foreach (var styleDeclaration in dataTrigger.StyleDeclarationBlock)
{
var property = typeNameResolver.GetDependencyProperty(styleSheet.Namespaces, targetType, styleDeclaration.Property);
if (property == null)
{
continue;
}
var value = typeNameResolver.GetPropertyValue(targetType, styleResourceReferenceHolder, styleDeclaration.Value, property);
if (value is string valueString)
{
value = TypeDescriptor.GetConverter(property.PropertyType)?.ConvertFromInvariantString(valueString) ?? value;
}
nativeTrigger.Setters.Add(new Setter {
Property = property, Value = value
});
}
return(nativeTrigger);
}
else if (trigger is EventTrigger)
{
var eventTrigger = trigger as EventTrigger;
var nativeTrigger = new System.Windows.EventTrigger();
var fieldInfo = targetType.GetField(eventTrigger.Event + "Event", BindingFlags.Static | BindingFlags.Public | BindingFlags.FlattenHierarchy);
nativeTrigger.RoutedEvent = (RoutedEvent)fieldInfo.GetValue(null);
foreach (var action in eventTrigger.Actions)
{
var actionTypeName = typeNameResolver.ResolveFullTypeName(styleSheet.Namespaces, action.Action);
var actionType = Type.GetType(actionTypeName);
var triggerAction = (System.Windows.TriggerAction)Activator.CreateInstance(actionType);
var parameters = action.Parameters.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries)
.Select(x => x.Trim())
.ToList();
foreach (var parameter in parameters)
{
var parameterName = parameter.Split(' ')[0];
object value = null;
var parameterValueExpression = parameter.Substring(parameterName.Length + 1).Trim();
DependencyProperty depProp;
var type = typeNameResolver.GetClrPropertyType(styleSheet.Namespaces, triggerAction, parameterName);
if (typeNameResolver.IsMarkupExtension(parameterValueExpression))
{
value = typeNameResolver.GetMarkupExtensionValue(styleResourceReferenceHolder, parameterValueExpression);
}
else if ((depProp = typeNameResolver.GetDependencyProperty(styleSheet.Namespaces, actionType, parameterName)) != null)
{
value = typeNameResolver.GetPropertyValue(actionType, styleResourceReferenceHolder, parameterValueExpression, depProp);
if (value is DynamicResourceExtension)
{
var dyn = value as DynamicResourceExtension;
var serviceProvider = (IServiceProvider)typeof(Application).GetProperty("ServiceProvider", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(Application.Current);
value = dyn.ProvideValue(serviceProvider);
}
else if (value is StaticResourceExtension)
{
var dyn = value as StaticResourceExtension;
var serviceProvider = (IServiceProvider)typeof(Application).GetProperty("ServiceProvider", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(Application.Current);
value = dyn.ProvideValue(serviceProvider);
}
}
else
{
value = parameterValueExpression;
}
if (value is string valueString)
{
value = TypeDescriptor.GetConverter(type)?.ConvertFromInvariantString(valueString) ?? value;
}
triggerAction.GetType().GetRuntimeProperty(parameterName).SetValue(triggerAction, value);
}
nativeTrigger.Actions.Add(triggerAction);
}
return(nativeTrigger);
}
throw new NotSupportedException($"Trigger '{trigger.GetType().FullName}' is not supported!");
}
private Dictionary <TDependencyProperty, object> CreateStyleDictionaryFromDeclarationBlock(
List <CssNamespace> namespaces,
StyleDeclarationBlock declarationBlock,
Type matchedType,
TDependencyObject dependencyObject)
{
var propertyStyleValues = new Dictionary <TDependencyProperty, object>();
foreach (var i in declarationBlock)
{
TDependencyProperty property;
if (i.Property.Contains("."))
{
string typename = null;
string propertyName = null;
if (i.Property.Contains("|"))
{
var strs = i.Property.Split('|', '.');
var alias = strs[0];
var namespaceFragments = namespaces
.First(x => x.Alias == alias)
.Namespace
.Split(',');
typename = $"{namespaceFragments[0]}.{strs[1]}, {string.Join(",", namespaceFragments.Skip(1))}";
propertyName = strs[2];
}
else
{
var strs = i.Property.Split('.');
var namespaceFragments = namespaces
.First(x => x.Alias == "")
.Namespace
.Split(',');
typename = $"{namespaceFragments[0]}.{strs[0]}, {string.Join(",", namespaceFragments.Skip(1))}";
propertyName = strs[1];
}
property = dependencyPropertyService.GetBindableProperty(Type.GetType(typename), propertyName);
}
else
{
property = dependencyPropertyService.GetBindableProperty(matchedType, i.Property);
}
if (property == null)
{
continue;
}
object propertyValue = null;
if (i.Value is string &&
((string)i.Value).StartsWith("{", StringComparison.Ordinal))
{
propertyValue = markupExpressionParser.ProvideValue((string)i.Value, dependencyObject);
}
else
{
propertyValue = dependencyPropertyService.GetBindablePropertyValue(matchedType, property, i.Value);
}
propertyStyleValues[property] = propertyValue;
}
return(propertyStyleValues);
}