/// <summary>
/// Finds the binding of the specified type on the specified viewmodel path.
/// </summary>
private FindBindingResult FindControlCommandBinding(string[] path, string commandId, DotvvmControl viewRootControl, DotvvmControl targetControl, string validationTargetPath)
{
// walk the control tree and find the path
ControlCommandBindingExpression resultBinding = null;
DotvvmProperty resultProperty = null;
DotvvmControl 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 ControlCommandBindingExpression)
.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 = (ControlCommandBindingExpression)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>
/// <param name="path">DataContext path of the binding</param>
/// <param name="commandId">Id of the binding</param>
/// <param name="viewRootControl">ViewRootControl of the binding</param>
/// <param name="targetControl">Target control of the binding, null if not finding control command binding</param>
/// <param name="validationTargetPath">Validation path of the binding</param>
/// <param name="findControl">Determinate whether finding control command binding or not</param>
/// <returns></returns>
private FindBindingResult FindCommandBinding(string[] path, string commandId,
DotvvmBindableObject viewRootControl, DotvvmBindableObject targetControl,
string validationTargetPath, bool findControl)
{
// walk the control tree and find the path
CommandBindingExpression resultBinding = null;
DotvvmBindableObject resultControl = null;
DotvvmProperty resultProperty = null;
bool checkControl;
bool bindingInPath = false;
var candidateBindings = new Dictionary <string, CandidateBindings>();
string errorMessage = null;
var walker = new ControlTreeWalker(viewRootControl);
walker.ProcessControlTree((control) =>
{
if (resultBinding == null)
{
// find bindings of current control
var bindings = control.GetAllBindings()
.Where(b => b.Value is CommandBindingExpression);
foreach (var binding in bindings)
{
var wrongExceptionPropertyKeys = new List <string>();
var correctExceptionPropertyKeys = new List <string>();
var infoMessage = new StringBuilder();
// checking path
if (!ViewModelPathComparer.AreEqual(path, walker.CurrentPathArray))
{
wrongExceptionPropertyKeys.Add("DataContext path");
infoMessage.Append(
$"Expected DataContext path: '{string.Join("/", path)}' Command binding DataContext path: '{string.Join("/", walker.CurrentPathArray)}'");
}
else
{
//Found a binding in DataContext
bindingInPath = true;
correctExceptionPropertyKeys.Add("DataContext path");
}
//checking binding id
if (((CommandBindingExpression)binding.Value).BindingId != commandId)
{
wrongExceptionPropertyKeys.Add("binding id");
}
else
{
correctExceptionPropertyKeys.Add("binding id");
}
//checking validation path
var currentValidationTargetPath = KnockoutHelper.GetValidationTargetExpression(control);
if (currentValidationTargetPath != validationTargetPath)
{
wrongExceptionPropertyKeys.Add("validation path");
infoMessage.Append($"Expected validation path: '{string.Join("/", validationTargetPath)}' Command binding validation path: '{string.Join("/", currentValidationTargetPath)}'");
}
else
{
correctExceptionPropertyKeys.Add("validation path");
}
//If finding control command binding checks if the binding is control otherwise always true
checkControl = !findControl || control.GetClosestControlBindingTarget() == targetControl;
if (!wrongExceptionPropertyKeys.Any() && checkControl)
{
//correct binding found
resultBinding = (CommandBindingExpression)binding.Value;
resultControl = control;
resultProperty = binding.Key;
}
else if (wrongExceptionPropertyKeys.Any())
{
var exceptionPropertyKey =
(findControl && checkControl
? "Control command bindings with wrong "
: "Command bindings with wrong ") + string.Join(", ", wrongExceptionPropertyKeys)
+ (correctExceptionPropertyKeys.Any()
? " and correct " + string.Join(", ", correctExceptionPropertyKeys)
: "")
+ ":";
if (!candidateBindings.ContainsKey(exceptionPropertyKey))
{
candidateBindings.Add(exceptionPropertyKey, new CandidateBindings());
}
candidateBindings[exceptionPropertyKey]
.AddBinding(new KeyValuePair <string, IBinding>(infoMessage.ToString(), binding.Value));
}
else
{
errorMessage = "Invalid command invocation (the binding is not control command binding)";
}
}
}
});
return(new FindBindingResult
{
ErrorMessage = bindingInPath ? errorMessage : "Nothing was found in found inside specified DataContext check if ViewModel is populated",
CandidateBindings = candidateBindings,
Binding = resultBinding,
Control = resultControl,
Property = resultProperty
});
}