public DotvvmControlException(DotvvmBindableObject control, string message, Exception innerException = null)
: base(message, innerException)
{
ControlType = control.GetType();
LineNumber = (int?)Internal.MarkupLineNumberProperty.GetValue(control);
FileName = (string)Internal.MarkupFileNameProperty.GetValue(control);
}
/// <summary>
/// Evaluates the binding.
/// </summary>
public object Evaluate(DotvvmBindableObject control, DotvvmProperty property, params object[] args)
{
var action = GetCommandDelegate(control, property);
if (action is Command) return (action as Command)();
if (action is Action) { (action as Action)(); return null; }
return action.DynamicInvoke(args);
}
protected virtual void SetValidatorValueBinding(DotvvmBindableObject textBox, BindingExpression valueBindingExpression)
{
if (CanValidate)
{
textBox.SetBinding(Validator.ValueProperty, valueBindingExpression);
}
}
/// <summary>
/// Processes the control tree.
/// </summary>
private void ProcessControlTreeCore(DotvvmBindableObject control, Action <DotvvmBindableObject> action)
{
// if there is a DataContext binding, locate the correct token
var hasDataContext = false;
var pathValue = control.GetDataContextPathFragment();
if (pathValue != null)
{
CurrentPath.Push(pathValue as string);
RefreshCurrentPathArray();
hasDataContext = true;
}
action(control);
// go through all children
foreach (var child in control.GetLogicalChildren())
{
ProcessControlTreeCore(child, action);
}
if (hasDataContext)
{
CurrentPath.Pop();
RefreshCurrentPathArray();
}
}
protected void ExecUpdateDelegate(DotvvmBindableObject contextControl, object value, bool seeThis, bool setRootControl = false)
{
var dataContexts = GetDataContexts(contextControl, seeThis);
var control = setRootControl ? GetRootControl(contextControl) : null;
UpdateDelegate(dataContexts, control, value);
}
public DotvvmControlException(DotvvmBindableObject control, string message, Exception innerException = null)
: base(message, innerException)
{
ControlType = control.GetType();
LineNumber = (int?)Internal.MarkupLineNumberProperty.GetValue(control);
if (control.Parent != null) control = control.Parent;
FileName = (string)Internal.MarkupFileNameProperty.GetValue(control);
}
private object ResolveStaticCommandService(DotvvmBindableObject c, Type type)
{
var context = (IDotvvmRequestContext)c.GetValue(Internal.RequestContextProperty, true);
#pragma warning disable CS0618
return(context.Services.GetRequiredService <IStaticCommandServiceLoader>().GetStaticCommandService(type, context));
#pragma warning restore CS0618
}
public override object?GetValue(DotvvmBindableObject control, bool inherit = true)
{
if (!TryGetValue(control, out var value, inherit))
{
return(FallbackProperty.GetValue(control, inherit));
}
return(value);
}
public static DataContextStack CreateChildStack(this DotvvmBindableObject bindableObject, Type viewModelType)
{
var dataContextTypeStack = bindableObject.GetDataContextType();
return(DataContextStack.Create(
viewModelType,
dataContextTypeStack,
dataContextTypeStack.NamespaceImports,
dataContextTypeStack.ExtensionParameters,
dataContextTypeStack.BindingPropertyResolvers));
}
/// <summary>
/// Gets all data context on the path to root
/// </summary>
public static object[] GetDataContexts(DotvvmBindableObject contextControl, bool seeThis)
{
var context = seeThis ? contextControl.GetValue(DotvvmBindableObject.DataContextProperty, false) : null;
return
((context == null ? new object[0] : new[] { context })
.Concat(contextControl.GetAllAncestors().OfType <DotvvmBindableObject>()
.Where(c => c.properties.ContainsKey(DotvvmBindableObject.DataContextProperty))
.Select(c => c.GetValue(DotvvmBindableObject.DataContextProperty, false)))
.ToArray());
}
public virtual object?GetValue(DotvvmBindableObject control, bool inherit = true)
{
if (control.properties.TryGet(this, out var value))
{
return(value);
}
if (IsValueInherited && inherit && control.Parent != null)
{
return(GetValue(control.Parent));
}
return(DefaultValue);
}
public static void CopyProperty(DotvvmBindableObject source, DotvvmProperty sourceProperty, DotvvmBindableObject target, DotvvmProperty targetProperty)
{
var binding = source.GetValueBinding(sourceProperty);
if (binding != null)
{
target.SetBinding(targetProperty, binding);
}
else
{
target.SetValue(targetProperty, source.GetValue(sourceProperty));
}
}
protected object ExecDelegate(DotvvmBindableObject contextControl, bool seeThis, bool setRootControl = false)
{
var dataContexts = GetDataContexts(contextControl, seeThis);
var control = setRootControl ? GetRootControl(contextControl) : null;
try
{
return Delegate(dataContexts, control);
}
catch (NullReferenceException)
{
return null;
}
}
protected object ExecDelegate(DotvvmBindableObject contextControl, bool seeThis)
{
var dataContexts = GetDataContexts(contextControl, seeThis);
var control = GetRootControl(contextControl);
try
{
return(Delegate(dataContexts, control));
}
catch (NullReferenceException)
{
return(null);
}
}
/// <summary>
/// Evaluates the binding.
/// </summary>
public object Evaluate(DotvvmBindableObject control, DotvvmProperty property, params object[] args)
{
var action = GetCommandDelegate(control, property);
if (action is Command)
{
return((action as Command)());
}
if (action is Action)
{
(action as Action)(); return(null);
}
return(action.DynamicInvoke(args));
}
public virtual bool IsSet(DotvvmBindableObject control, bool inherit = true)
{
if (control.properties.Contains(this))
{
return(true);
}
if (IsValueInherited && inherit && control.Parent != null)
{
return(IsSet(control.Parent));
}
return(false);
}
/// <summary>
/// Gets whether the value of the property is set
/// </summary>
public override bool IsSet(DotvvmBindableObject control, bool inherit = true)
{
if (control.properties != null && control.properties.ContainsKey(this))
{
return(true);
}
if (IsValueInherited && inherit && control.Parent != null)
{
return(IsSet(control.Parent));
}
return(DefaultProperty.IsSet(control, DefaultPropertyInherit));
}
private bool TryGetValue(DotvvmBindableObject control, out object?value, bool inherit = true)
{
if (control.properties.TryGet(this, out value))
{
return(true);
}
if (IsValueInherited && inherit && control.Parent != null)
{
return(TryGetValue(control.Parent, out value));
}
value = null;
return(false);
}
public static void AndAssignProperty(this DotvvmBindableObject obj, DotvvmProperty property, object value)
{
if (property.PropertyType != typeof(bool))
{
throw new NotSupportedException($"Can only AND boolean properties, {property} is of type {property.PropertyType}");
}
if (!obj.IsPropertySet(property))
{
obj.SetValue(property, value);
}
else
{
if (value is bool b && !b)
{
obj.SetValue(property, false);
}
/// <summary>
/// Gets all data context on the path to root
/// </summary>
public static object[] GetDataContexts(DotvvmBindableObject contextControl, bool seeThis)
{
if (!seeThis)
{
contextControl = contextControl.Parent;
if (contextControl == null)
{
return new object[0];
}
}
// PERF:
return new [] { contextControl }.Concat(contextControl.GetAllAncestors())
.Where(c => c.IsPropertySet(DotvvmBindableObject.DataContextProperty, false))
.Select(c => c.GetValue(DotvvmBindableObject.DataContextProperty, false))
.ToArray();
}
private static string TranslateRouteParameter(DotvvmBindableObject control, KeyValuePair <string, object> param, bool caseSensitive = false)
{
string expression = "";
if (param.Value is IBinding)
{
EnsureValidBindingType(param.Value as IBinding);
expression = (param.Value as IValueBinding)?.GetKnockoutBindingExpression(control)
?? JsonConvert.SerializeObject((param.Value as IStaticValueBinding)?.Evaluate(control), DefaultViewModelSerializer.CreateDefaultSettings());
}
else
{
expression = JsonConvert.SerializeObject(param.Value, DefaultViewModelSerializer.CreateDefaultSettings());
}
return(JsonConvert.SerializeObject(caseSensitive ? param.Key : param.Key.ToLower()) + ": " + expression);
}
/// <summary>
/// Gets all data context on the path to root
/// </summary>
public static object[] GetDataContexts(DotvvmBindableObject contextControl, bool seeThis)
{
if (!seeThis)
{
contextControl = contextControl.Parent;
if (contextControl == null)
{
return(new object[0]);
}
}
// PERF:
return(new [] { contextControl }.Concat(contextControl.GetAllAncestors())
.Where(c => c.IsPropertySet(DotvvmBindableObject.DataContextProperty, false))
.Select(c => c.GetValue(DotvvmBindableObject.DataContextProperty, false))
.ToArray());
}
/// <summary>
/// Gets the value of the property.
/// </summary>
public override object GetValue(DotvvmBindableObject control, bool inherit = true)
{
object value;
if (control.properties != null)
{
if (control.properties.TryGetValue(this, out value))
{
return(value);
}
}
if (IsValueInherited && inherit && control.Parent != null)
{
return(GetValue(control.Parent));
}
return(DefaultProperty.GetValue(control, DefaultPropertyInherit));
}
/// <summary>
/// Finds the binding of the specified type on the specified viewmodel path.
/// </summary>
private FindBindingResult FindControlCommandBinding(string[] path, string commandId, DotvvmControl viewRootControl, DotvvmBindableObject targetControl, string validationTargetPath)
{
// walk the control tree and find the path
CommandBindingExpression resultBinding = null;
DotvvmProperty resultProperty = null;
DotvvmBindableObject resultControl = null;
var walker = new ControlTreeWalker(viewRootControl);
walker.ProcessControlTree((control) =>
{
// compare path
if (ViewModelPathComparer.AreEqual(path, walker.CurrentPathArray))
{
// find bindings of current control
var binding = control.GetAllBindings().Where(p => p.Value is CommandBindingExpression)
.FirstOrDefault(b => b.Value.BindingId == commandId);
if (binding.Key != null)
{
// verify that the target control is the control command target
if (control.GetClosestControlBindingTarget() == targetControl)
{
// we have found the binding, now get the validation path
var currentValidationTargetPath = KnockoutHelper.GetValidationTargetExpression(control);
if (currentValidationTargetPath == validationTargetPath)
{
// the validation path is equal, we have found the binding
resultBinding = (CommandBindingExpression)binding.Value;
resultProperty = binding.Key;
resultControl = control;
}
}
}
}
});
return(new FindBindingResult
{
Property = resultProperty,
Binding = resultBinding,
Control = resultControl
});
}
/// <summary>
/// Finds the binding of the specified type on the specified viewmodel path.
/// </summary>
private FindBindingResult FindCommandBinding(string[] path, string commandId, DotvvmBindableObject viewRootControl, string validationTargetPath)
{
// walk the control tree and find the path
CommandBindingExpression resultBinding = null;
DotvvmBindableObject resultControl = null;
DotvvmProperty resultProperty = null;
var walker = new ControlTreeWalker(viewRootControl);
walker.ProcessControlTree((control) =>
{
// compare path
if (resultBinding == null && ViewModelPathComparer.AreEqual(path, walker.CurrentPathArray))
{
// find bindings of current control
var binding = control.GetAllBindings().Where(p => p.Value is CommandBindingExpression)
.FirstOrDefault(b => b.Value.BindingId == commandId);
if (binding.Key != null)
{
// we have found the binding, now get the validation path
var currentValidationTargetPath = KnockoutHelper.GetValidationTargetExpression(control);
if (currentValidationTargetPath == validationTargetPath)
{
// the validation path is equal, we have found the binding
resultBinding = (CommandBindingExpression)binding.Value;
resultControl = control;
resultProperty = binding.Key;
}
}
}
});
return new FindBindingResult
{
Binding = resultBinding,
Control = resultControl,
Property = resultProperty
};
}
/// <summary>
/// Processes the control tree.
/// </summary>
private void ProcessControlTreeCore(DotvvmBindableObject control, Action<DotvvmBindableObject> action)
{
// if there is a DataContext binding, locate the correct token
var hasDataContext = false;
var pathValue = control.GetValue(Internal.PathFragmentProperty, false);
if (pathValue != null)
{
CurrentPath.Push(pathValue as string);
RefreshCurrentPathArray();
hasDataContext = true;
}
else
{
var binding = control.GetValueBinding(DotvvmBindableObject.DataContextProperty, false);
if (binding != null)
{
CurrentPath.Push(binding.GetKnockoutBindingExpression());
RefreshCurrentPathArray();
hasDataContext = true;
}
}
action(control);
// go through all children
foreach (var child in control.GetLogicalChildren())
{
ProcessControlTreeCore(child, action);
}
if (hasDataContext)
{
CurrentPath.Pop();
RefreshCurrentPathArray();
}
}
public override object Evaluate(DotvvmBindableObject control, DotvvmProperty property)
{
return ExecDelegate(control, property != DotvvmBindableObject.DataContextProperty, setRootControl: true);
}
/// <summary> /// Gets Internal.PathFragmentProperty or DataContext.KnockoutExpression /// </summary> public static string GetDataContextPathFragment(this DotvvmBindableObject currentControl) => (string)currentControl.GetValue(Internal.PathFragmentProperty, inherit: false) ??
/// <summary>
/// Gets the validation target expression.
/// </summary>
public static string GetValidationTargetExpression(DotvvmBindableObject control)
{
if (!(bool)control.GetValue(Validation.EnabledProperty))
{
return null;
}
// find the closest control
int dataSourceChanges;
var validationTargetControl = control.GetClosestWithPropertyValue(out dataSourceChanges, c => c.GetValueBinding(Validation.TargetProperty) != null);
if (validationTargetControl == null)
{
return "$root";
}
// reparent the expression to work in current DataContext
// FIXME: This does not work:
var validationBindingExpression = validationTargetControl.GetValueBinding(Validation.TargetProperty);
string validationExpression = validationBindingExpression.GetKnockoutBindingExpression();
validationExpression = string.Join("", Enumerable.Range(0, dataSourceChanges).Select(i => "$parent.")) + validationExpression;
return validationExpression;
}
/// <summary>
/// Called right before the page is rendered.
/// </summary>
public void OnControlRendering(DotvvmBindableObject dotvvmControl)
{
}
public override Delegate GetCommandDelegate(DotvvmBindableObject control, DotvvmProperty property)
{
return (Delegate)ExecDelegate(control, true, true);
}
public static ParametrizedCode GetParametrizedKnockoutExpression(this IValueBinding binding, DotvvmBindableObject currentControl, bool unwrapped = false) => JavascriptTranslator.AdjustKnockoutScriptContext(unwrapped ? binding.UnwrappedKnockoutExpression : binding.KnockoutExpression, dataContextLevel: FindDataContextTarget(binding, currentControl).stepsUp);
/// <summary>
/// Initializes a new instance of the <see cref="ControlTreeWalker"/> class.
/// </summary>
public ControlTreeWalker(DotvvmBindableObject root)
{
this.root = root;
}
private DotvvmBindableObject GetRootControl(DotvvmBindableObject control)
{
return control.GetClosestControlBindingTarget();
}
public static string?GetDataContextPathFragment(this DotvvmBindableObject currentControl) => (string?)currentControl.GetValue(Internal.PathFragmentProperty, inherit: false) ?? (currentControl.GetBinding(DotvvmBindableObject.DataContextProperty, inherit: false) is IValueBinding binding ?
protected void ExecUpdateDelegate(DotvvmBindableObject contextControl, object value, bool seeThis, bool setRootControl = false)
{
var dataContexts = GetDataContexts(contextControl, seeThis);
var control = setRootControl ? GetRootControl(contextControl) : null;
UpdateDelegate(dataContexts, control, value);
}
public virtual Delegate GetCommandDelegate(DotvvmBindableObject control, DotvvmProperty property)
{
return (Delegate)ExecDelegate(control, property != DotvvmBindableObject.DataContextProperty);
}
public override Delegate GetCommandDelegate(DotvvmBindableObject control, DotvvmProperty property)
{
throw new NotImplementedException();
}
public virtual void SetValue(DotvvmBindableObject control, object?value)
{
control.properties.Set(this, value);
}
/// <summary>
/// Sets the value of the property.
/// </summary>
public virtual void SetValue(DotvvmBindableObject control, object value)
{
control.Properties[this] = value;
}
public static string GetKnockoutBindingExpression(this IValueBinding binding, DotvvmBindableObject currentControl, bool unwrapped = false) => (unwrapped ? binding.UnwrappedKnockoutExpression : binding.KnockoutExpression) .FormatKnockoutScript(currentControl, binding);
/// <summary>
/// Called when a control of the property type is created and initialized.
/// </summary>
protected internal virtual void OnControlInitialized(DotvvmBindableObject dotvvmControl)
{
}
public static string FormatKnockoutScript(this ParametrizedCode code, DotvvmBindableObject currentControl, IBinding currentBinding) => JavascriptTranslator.FormatKnockoutScript(code, dataContextLevel: FindDataContextTarget(currentBinding, currentControl).stepsUp);
/// <summary>
/// Updates the viewModel with the new value.
/// </summary>
public virtual void UpdateSource(object value, DotvvmBindableObject control, DotvvmProperty property)
{
ExecUpdateDelegate(control, value, property != DotvvmBindableObject.DataContextProperty);
}
private object ResolveStaticCommandService(DotvvmBindableObject c, Type type)
{
var context = (IDotvvmRequestContext)c.GetValue(Internal.RequestContextProperty, true);
return(context.Services.GetService <IStaticCommandServiceLoader>().GetStaticCommandService(type, context));
}
/// <summary>
/// Evaluates the binding.
/// </summary>
public virtual object Evaluate(DotvvmBindableObject control, DotvvmProperty property)
{
return ExecDelegate(control, property != DotvvmBindableObject.DataContextProperty);
}
