/// <inheritdoc />
protected override IEnumerable <IDataItem> GetItemsImpl(ICollection <DataBinding> bindings, bool includeDynamicItems)
{
IDataProvider[] providers = GenericCollectionUtils.ToArray(DataSets);
int providerCount = providers.Length;
var bindingsPerProvider = new List <DataBinding> [providerCount];
for (int i = 0; i < providerCount; i++)
{
bindingsPerProvider[i] = new List <DataBinding>();
}
foreach (DataBinding binding in bindings)
{
ResolvedBinding resolvedBinding = ResolveBinding(binding);
if (resolvedBinding != null)
{
bindingsPerProvider[resolvedBinding.DataSetInfo.DataSetIndex].Add(resolvedBinding.Inner);
}
}
foreach (IList <IDataItem> itemList in strategy.Join(providers, bindingsPerProvider, includeDynamicItems))
{
yield return(new JoinedDataItem(this, itemList));
}
}
public LocationInfoBindingProperty GetLocationInfo(ResolvedBinding resolvedBinding)
{
return(new LocationInfoBindingProperty(
resolvedBinding.TreeRoot?.FileName,
resolvedBinding.DothtmlNode?.Tokens?.Select(t => (t.StartPosition, t.EndPosition)).ToArray(),
resolvedBinding.DothtmlNode?.Tokens?.FirstOrDefault()?.LineNumber ?? -1,
resolvedBinding.GetAncestors().OfType <ResolvedControl>().FirstOrDefault()?.Metadata?.Type));
}
public virtual IBinding CreateMinimalClone(ResolvedBinding binding)
{
var properties = GetMinimalCloneProperties(binding.Binding);
return((IBinding)Activator.CreateInstance(binding.BindingType, new object[] {
binding.BindingService,
properties
}));
}
protected override object GetValueImpl(DataBinding binding)
{
ResolvedBinding resolvedBinding = owner.ResolveBinding(binding);
if (resolvedBinding == null)
{
throw new DataBindingException("Could not determine the underlying data set that supports the binding.", binding);
}
return(items[resolvedBinding.DataSetInfo.DataSetIndex].GetValue(resolvedBinding.Inner));
}
public virtual IBinding CreateMinimalClone(ResolvedBinding binding)
{
var requirements = binding.BindingService.GetRequirements(binding.Binding);
var properties = requirements.Required.Concat(requirements.Optional)
.Concat(new[] { typeof(OriginalStringBindingProperty), typeof(DataContextStack), typeof(LocationInfoBindingProperty) })
.Select(p => binding.Binding.GetProperty(p, ErrorHandlingMode.ReturnNull))
.Where(p => p != null).ToArray();
return((IBinding)Activator.CreateInstance(binding.BindingType, new object[] {
binding.BindingService,
properties
}));
}
public override string CompileToJs(ResolvedBinding binding, CompiledBindingExpression compiledExpression)
{
var expression = binding.GetExpression();
var visitor = new ExtractExpressionVisitor(ex => ex.NodeType == ExpressionType.Call);
var rootCallback = visitor.Visit(expression);
var js = SouldCompileCallback(rootCallback) ? JavascriptTranslator.CompileToJavascript(rootCallback, binding.DataContextTypeStack) : null;
foreach (var param in visitor.ParameterOrder)
{
var callback = js == null ? null : $"function({param.Name}){{{js}}}";
var method = visitor.Replaced[param] as MethodCallExpression;
js = CompileMethodCall(method, binding.DataContextTypeStack, callback);
}
return("var $context = ko.contextFor(this);var sender = this;(function(i_pageArea){with($context){" + js + "}})");
}
protected virtual Expression GetExpression(ResolvedPropertySetter a, out ResolvedBinding binding)
{
binding = null;
if (a is ResolvedPropertyValue)
{
return(Expression.Constant(a.CastTo <ResolvedPropertyValue>().Value));
}
else if (a is ResolvedPropertyBinding)
{
binding = a.CastTo <ResolvedPropertyBinding>().Binding;
return(binding.GetExpression());
}
else
{
return(null);
}
}
public BindingExpressionCompilationInfo PrecompileBinding(ResolvedBinding binding, string id, Type expectedType)
{
var compilerAttribute = GetCompilationAttribute(binding.BindingType);
var requirements = compilerAttribute.GetRequirements(binding.BindingType);
var result = new BindingExpressionCompilationInfo();
result.MethodName = TryExecute(binding.BindingNode, "Error while compiling binding to delegate.", requirements.Delegate, () => CompileMethod(compilerAttribute.CompileToDelegate(binding.GetExpression(), binding.DataContextTypeStack, expectedType)));
result.UpdateMethodName = TryExecute(binding.BindingNode, "Error while compiling update delegate.", requirements.UpdateDelegate, () => CompileMethod(compilerAttribute.CompileToUpdateDelegate(binding.GetExpression(), binding.DataContextTypeStack)));
result.OriginalString = TryExecute(binding.BindingNode, "hey, no, that should not happen. Really.", requirements.OriginalString, () => binding.Value);
result.Expression = TryExecute(binding.BindingNode, "Could not get binding expression.", requirements.Expression, () => binding.GetExpression());
result.ActionFilters = TryExecute(binding.BindingNode, "", requirements.ActionFilters, () => GetActionAttributeData(binding.GetExpression()));
result.Javascript = TryExecute(binding.BindingNode, "Could not compile binding to Javascript.", requirements.Javascript, () => compilerAttribute.CompileToJavascript(binding, new CompiledBindingExpression()
{
Expression = result.Expression,
Id = id,
OriginalString = result.OriginalString
}));
return(result);
}
public new string CompileToJavascript(ResolvedBinding binding, CompiledBindingExpression compiledExpression, DotvvmConfiguration config)
{
var vmMapper = config.ServiceLocator.GetService <IViewModelSerializationMapper>();
var expression = binding.GetExpression();
var visitor = new ExtractExpressionVisitor(ex => ex.NodeType == ExpressionType.Call);
var rootCallback = visitor.Visit(expression);
var js = SouldCompileCallback(rootCallback) ? "resultPromise.resolve(" + JavascriptTranslator.FormatKnockoutScript(JavascriptTranslator.CompileToJavascript(rootCallback, binding.DataContextTypeStack, vmMapper), allowDataGlobal: false) + ")" : null;
foreach (var param in visitor.ParameterOrder.Reverse <ParameterExpression>())
{
if (js == null)
{
js = $"resultPromise.resolve({param.Name})";
}
var callback = $"function({param.Name}){{{js}}}";
var method = visitor.Replaced[param] as MethodCallExpression;
js = CompileMethodCall(method, binding.DataContextTypeStack, vmMapper, callback);
}
return("var $context = ko.contextFor(this);var sender = this;var resultPromise = new DotvvmPromise();(function(i_pageArea){with($context){" + js + "}})");
}
public IdBindingProperty CreateBindingId(
OriginalStringBindingProperty originalString = null,
ParsedExpressionBindingProperty expression = null,
DataContextStack dataContext = null,
ResolvedBinding resolvedBinding = null,
AssignedPropertyBindingProperty assignedProperty = null)
{
var sb = new StringBuilder();
// don't append expression when original string is present, so it does not have to be always exactly same
if (originalString != null)
{
sb.Append(originalString.Code);
}
else
{
sb.Append(expression.ToString());
}
sb.Append("|||");
sb.Append(dataContext?.GetHashCode());
sb.Append("|||");
sb.Append(assignedProperty?.DotvvmProperty?.FullName);
sb.Append(assignedProperty?.DotvvmProperty?.GetHashCode());
if (resolvedBinding?.TreeRoot != null)
{
var bindingIndex = bindingCounts.GetOrCreateValue(resolvedBinding.TreeRoot).AddOrUpdate(dataContext, 0, (_, i) => i + 1);
sb.Append("|||");
sb.Append(bindingIndex);
}
using (var sha = System.Security.Cryptography.SHA256.Create())
{
var hash = sha.ComputeHash(Encoding.Unicode.GetBytes(sb.ToString()));
// use just 12 bytes = 96 bits
return(new IdBindingProperty(Convert.ToBase64String(hash, 0, 12)));
}
}
public virtual string CompileToJavascript(ResolvedBinding binding, CompiledBindingExpression expression)
{
var javascript = JavascriptTranslator.CompileToJavascript(binding.GetExpression(), binding.DataContextTypeStack);
if (javascript == "$data")
{
javascript = "$rawData";
}
else if (javascript.StartsWith("$data.", StringComparison.Ordinal))
{
javascript = javascript.Substring("$data.".Length);
}
// do not produce try/eval on single properties
if (javascript.Contains(".") || javascript.Contains("("))
{
return("dotvvm.evaluator.tryEval(function(){return " + javascript + "})");
}
else
{
return(javascript);
}
}
/// <summary>
/// Emits binding constructor and returns variable name
/// </summary>
protected ExpressionSyntax ProcessBinding(ResolvedBinding binding)
{
return(bindingCompiler.EmitCreateBinding(emitter, binding));
}
public override ExpressionSyntax EmitCreateBinding(DefaultViewCompilerCodeEmitter emitter, ResolvedBinding binding, string id, Type expectedType)
{
var info = PrecompileBinding(binding, id, expectedType);
if (emitter != null)
{
return(GetCachedInitializer(emitter, GetCompiledBindingCreation(emitter, info.MethodName, info.UpdateMethodName, info.OriginalString, this.GetAttributeInitializers(info.ActionFilters, emitter)?.ToArray(), info.Javascript, id)));
}
else
{
return(null);
}
}
public override string CompileToJs(ResolvedBinding binding, CompiledBindingExpression expression)
{
return($"dotvvm.postbackScript('{ expression.Id }')");
}
public virtual Expression GetExpression(ResolvedBinding binding)
{
return(binding.GetExpression());
}
public string GetId(ResolvedBinding binding, string fileHash)
{
return(binding.Value);
}
public virtual ExpressionSyntax EmitCreateBinding(DefaultViewCompilerCodeEmitter emitter, ResolvedBinding binding)
{
var newbinding = CreateMinimalClone(binding);
return(emitter.EmitValue(newbinding));
}
/// <summary>
/// Emits binding contructor and returns variable name
/// </summary>
protected ExpressionSyntax ProcessBinding(ResolvedBinding binding, Type expectedType)
{
//return emitter.EmitCreateObject(binding.Type, new object[] { binding.Value });
return(emitter.CreateObjectExpression(binding.BindingType, new[] { bindingCompiler.EmitCreateBinding(emitter, binding, bindingIdGenerator(binding), expectedType) }));
}
/// <summary>
/// https://tc39.es/ecma262/#sec-resolveexport
/// </summary>
internal override ResolvedBinding ResolveExport(string exportName, List <ExportResolveSetItem> resolveSet = null)
{
resolveSet ??= new List <ExportResolveSetItem>();
for (var i = 0; i < resolveSet.Count; i++)
{
var r = resolveSet[i];
if (ReferenceEquals(this, r.Module) && exportName == r.ExportName)
{
// circular import request
return(null);
}
}
resolveSet.Add(new ExportResolveSetItem(this, exportName));
for (var i = 0; i < _localExportEntries.Count; i++)
{
var e = _localExportEntries[i];
if (exportName == e.ExportName)
{
// i. Assert: module provides the direct binding for this export.
return(new ResolvedBinding(this, e.LocalName));
}
}
for (var i = 0; i < _indirectExportEntries.Count; i++)
{
var e = _indirectExportEntries[i];
if (exportName == e.ExportName)
{
var importedModule = _engine._host.ResolveImportedModule(this, e.ModuleRequest);
if (e.ImportName == "*")
{
// 1. Assert: module does not provide the direct binding for this export.
return(new ResolvedBinding(importedModule, "*namespace*"));
}
else
{
// 1. Assert: module imports a specific binding for this export.
return(importedModule.ResolveExport(e.ImportName, resolveSet));
}
}
}
if ("default".Equals(exportName))
{
// Assert: A default export was not explicitly defined by this module
return(null);
}
ResolvedBinding starResolution = null;
for (var i = 0; i < _starExportEntries.Count; i++)
{
var e = _starExportEntries[i];
var importedModule = _engine._host.ResolveImportedModule(this, e.ModuleRequest);
var resolution = importedModule.ResolveExport(exportName, resolveSet);
if (resolution == ResolvedBinding.Ambiguous)
{
return(resolution);
}
if (resolution is not null)
{
if (starResolution is null)
{
starResolution = resolution;
}
else
{
if (resolution.Module != starResolution.Module || resolution.BindingName != starResolution.BindingName)
{
return(ResolvedBinding.Ambiguous);
}
}
}
}
return(starResolution);
}
/// <inheritdoc />
protected override bool CanBindImpl(DataBinding binding)
{
ResolvedBinding resolvedBinding = ResolveBinding(binding);
return(resolvedBinding != null && DataSets[resolvedBinding.DataSetInfo.DataSetIndex].CanBind(resolvedBinding.Inner));
}
public string CompileToJavascript(ResolvedBinding binding, CompiledBindingExpression expression, DotvvmConfiguration config)
{
return(new JsIdentifierExpression("dotvvm").Member("postbackScript").Invoke(new JsLiteral(expression.Id)).FormatScript());
}
public override string CompileToJavascript(ResolvedBinding binding, CompiledBindingExpression expression)
{
return($"dotvvm.postbackScript({ JsonConvert.SerializeObject(expression.Id) })");
}
protected virtual ResolvedPropertySetter EmitBinding(Expression expression, DotvvmProperty property, ResolvedBinding originalBidning, ref string errror)
{
if (originalBidning == null)
{
errror = $"Could not merge constant values to binding '{expression}'."; return(null);
}
return(new ResolvedPropertyBinding(property,
new ResolvedBinding(originalBidning.BindingService, originalBidning.Binding.GetProperty <BindingParserOptions>(), originalBidning.DataContextTypeStack, null, expression, property))
{
DothtmlNode = originalBidning.DothtmlNode
});
}
public virtual ExpressionSyntax EmitCreateBinding(DefaultViewCompilerCodeEmitter emitter, ResolvedBinding binding, string id, Type expectedType)
{
var compilerAttribute = GetCompilationAttribute(binding.BindingType);
var requirements = compilerAttribute.GetRequirements(binding.BindingType);
var expression = new Lazy <Expression>(() => compilerAttribute.GetExpression(binding));
var compiled = new CompiledBindingExpression();
compiled.Delegate = TryExecute(binding.BindingNode, "Error while compiling binding to delegate.", requirements.Delegate, () => CompileExpression(compilerAttribute.CompileToDelegate(binding.GetExpression(), binding.DataContextTypeStack, expectedType), binding.DebugInfo));
compiled.UpdateDelegate = TryExecute(binding.BindingNode, "Error while compiling update delegate.", requirements.UpdateDelegate, () => compilerAttribute.CompileToUpdateDelegate(binding.GetExpression(), binding.DataContextTypeStack).Compile());
compiled.OriginalString = TryExecute(binding.BindingNode, "hey, no, that should not happen. Really.", requirements.OriginalString, () => binding.Value);
compiled.Expression = TryExecute(binding.BindingNode, "Could not get binding expression.", requirements.Expression, () => binding.GetExpression());
compiled.Id = id;
compiled.ActionFilters = TryExecute(binding.BindingNode, "", requirements.ActionFilters, () => compilerAttribute.GetActionFilters(binding.GetExpression()).ToArray());
compiled.Javascript = TryExecute(binding.BindingNode, "Could not compile binding to Javascript.", requirements.Javascript, () => compilerAttribute.CompileToJavascript(binding, compiled));
var index = Interlocked.Increment(ref globalBindingIndex);
if (!GlobalBindingList.TryAdd(index, compiled))
{
throw new Exception("internal bug");
}
return(EmitGetCompiledBinding(index));
}
protected virtual ResolvedPropertySetter EmitBinding(Expression expression, DotvvmProperty property, ResolvedBinding originalBidning, ref string errror)
{
if (originalBidning == null)
{
errror = $"Could not merge constant values to binding '{expression}'."; return(null);
}
return(new ResolvedPropertyBinding(property, new ResolvedBinding
{
BindingType = originalBidning.BindingType,
DataContextTypeStack = originalBidning.DataContextTypeStack,
Expression = expression,
Parent = originalBidning.Parent,
ResultType = new ResolvedTypeDescriptor(expression.Type)
}));
}
public IdBindingProperty CreateBindingId(
OriginalStringBindingProperty originalString = null,
ParsedExpressionBindingProperty expression = null,
DataContextStack dataContext = null,
ResolvedBinding resolvedBinding = null,
LocationInfoBindingProperty locationInfo = null)
{
var sb = new StringBuilder();
if (resolvedBinding?.TreeRoot != null && dataContext != null)
{
var bindingIndex = bindingCounts.GetOrCreateValue(resolvedBinding.TreeRoot).AddOrUpdate(dataContext, 0, (_, i) => i + 1);
sb.Append(bindingIndex);
sb.Append(" || ");
}
// don't append expression when original string is present, so it does not have to be always exactly same
if (originalString != null)
{
sb.Append(originalString.Code);
}
else
{
sb.Append(expression.Expression.ToString());
}
sb.Append(" || ");
while (dataContext != null)
{
sb.Append(dataContext.DataContextType.FullName);
sb.Append('(');
foreach (var ns in dataContext.NamespaceImports)
{
sb.Append(ns.Alias);
sb.Append('=');
sb.Append(ns.Namespace);
}
sb.Append(';');
foreach (var ext in dataContext.ExtensionParameters)
{
sb.Append(ext.Identifier);
if (ext.Inherit)
{
sb.Append('*');
}
sb.Append(':');
sb.Append(ext.ParameterType.FullName);
sb.Append(':');
sb.Append(ext.GetType().FullName);
}
sb.Append(") -- ");
dataContext = dataContext.Parent;
}
sb.Append(" || ");
sb.Append(locationInfo?.RelatedProperty?.FullName);
using (var sha = System.Security.Cryptography.SHA256.Create())
{
var hash = sha.ComputeHash(Encoding.Unicode.GetBytes(sb.ToString()));
// use just 12 bytes = 96 bits
return(new IdBindingProperty(Convert.ToBase64String(hash, 0, 12)));
}
}
//public BindingExpressionCompilationInfo PrecompileBinding(ResolvedBinding binding, string id, Type expectedType)
//{
// var compilerAttribute = GetCompilationAttribute(binding.BindingType);
// var requirements = compilerAttribute.GetRequirements(binding.BindingType);
// var result = new BindingExpressionCompilationInfo();
// result.MethodName = TryExecute(binding.BindingNode, "Error while compiling binding to delegate.", requirements.Delegate, () => CompileMethod(compilerAttribute.CompileToDelegate(binding.GetExpression(), binding.DataContextTypeStack, expectedType)));
// result.UpdateMethodName = TryExecute(binding.BindingNode, "Error while compiling update delegate.", requirements.UpdateDelegate, () => CompileMethod(compilerAttribute.CompileToUpdateDelegate(binding.GetExpression(), binding.DataContextTypeStack)));
// result.OriginalString = TryExecute(binding.BindingNode, "hey, no, that should not happen. Really.", requirements.OriginalString, () => binding.Value);
// result.Expression = TryExecute(binding.BindingNode, "Could not get binding expression.", requirements.Expression, () => binding.GetExpression());
// result.ActionFilters = TryExecute(binding.BindingNode, "", requirements.ActionFilters, () => GetActionAttributeData(binding.GetExpression()));
// result.Javascript = TryExecute(binding.BindingNode, "Could not compile binding to Javascript.", requirements.Javascript, () => compilerAttribute.CompileToJavascript(binding, new CompiledBindingExpression()
// {
// Expression = result.Expression,
// Id = id,
// OriginalString = result.OriginalString
// }, configuration));
// return result;
//}
public override ExpressionSyntax EmitCreateBinding(DefaultViewCompilerCodeEmitter emitter, ResolvedBinding binding)
{
throw new NotImplementedException();
//var info = PrecompileBinding(binding, id, expectedType);
//if (emitter != null)
//{
// return GetCachedInitializer(emitter, GetCompiledBindingCreation(emitter, info.MethodName, info.UpdateMethodName, info.OriginalString, this.GetAttributeInitializers(info.ActionFilters, emitter)?.ToArray(), info.Javascript, id));
//}
//else return null;
}
