public void ResolveName(BindingDefinition bd)
{
if (!Names.ContainsKey(bd.TargetName))
{
throw new Exception("Target Name '" + bd.TargetName + "' not found");
}
NodeAddress resolvedNA = null;
foreach (NodeAddress na in Names[bd.TargetName])
{
bool naMatch = true;
for (int i = 0; i < bd.TargetNA.Count; i++)
{
if (bd.TargetNA [i] != na [i])
{
naMatch = false;
break;
}
}
if (naMatch)
{
resolvedNA = na;
break;
}
}
if (resolvedNA == null)
{
throw new Exception("Target Name '" + bd.TargetName + "' not found");
}
bd.ResolveTargetName(resolvedNA);
}
public void StorePropertyBinding(BindingDefinition bindDef)
{
if (bindDef.HasUnresolvedTargetName)
{
UnresolvedTargets.Add(bindDef);
return;
}
StorePropertyBinding(bindDef.TargetNA, bindDef.TargetMember, bindDef.SourceNA, bindDef.SourceMember);
if (bindDef.TwoWay)
{
StorePropertyBinding(bindDef.SourceNA, bindDef.SourceMember, bindDef.TargetNA, bindDef.TargetMember);
}
}
/// <summary>
/// get BindingDefinition from binding expression
/// </summary>
public BindingDefinition GetBindingDef(string sourceMember, string expression)
{
BindingDefinition bindingDef = new BindingDefinition(this, sourceMember);
if (string.IsNullOrEmpty(expression))
{
return(bindingDef);
}
else
{
if (expression.StartsWith("²"))
{
bindingDef.TwoWay = true;
expression = expression.Substring(1);
}
string exp = expression;
bindingDef.TargetNA = this.ResolveExpression(ref exp);
string [] bindTrg = exp.Split('.');
if (bindTrg.Length == 0)
{
throw new Exception("invalid binding expression: " + expression);
}
if (bindTrg.Length == 1)
{
bindingDef.TargetMember = bindTrg [0];
}
else
{
if (!string.IsNullOrEmpty(bindTrg[0])) //searchByName
{
bindingDef.TargetName = bindTrg[0];
}
bindingDef.TargetMember = exp.Substring(bindTrg[0].Length + 1);
}
}
return(bindingDef);
}
public void StorePropertyBinding(BindingDefinition bindDef)
{
if (bindDef.HasUnresolvedTargetName) {
UnresolvedTargets.Add (bindDef);
return;
}
StorePropertyBinding (bindDef.TargetNA, bindDef.TargetMember, bindDef.SourceNA, bindDef.SourceMember);
if (bindDef.TwoWay)
StorePropertyBinding (bindDef.SourceNA, bindDef.SourceMember, bindDef.TargetNA, bindDef.TargetMember);
}
public void ResolveName(BindingDefinition bd)
{
if (!Names.ContainsKey (bd.TargetName))
throw new Exception ("Target Name '" + bd.TargetName + "' not found");
NodeAddress resolvedNA = null;
foreach (NodeAddress na in Names[bd.TargetName]) {
bool naMatch = true;
for (int i = 0; i < bd.TargetNA.Count; i++) {
if (bd.TargetNA [i] != na [i]) {
naMatch = false;
break;
}
}
if (naMatch) {
resolvedNA = na;
break;
}
}
if (resolvedNA == null)
throw new Exception ("Target Name '" + bd.TargetName + "' not found");
bd.ResolveTargetName (resolvedNA);
}
/// <summary>
/// Splits the binding expression
/// </summary>
/// <returns><c>true</c>, if it's a two way binding, <c>false</c> otherwise.</returns>
/// <param name="sourceNA">Source Node address</param>
/// <param name="expression">Expression.</param>
/// <param name="targetNA">Target Node Address</param>
/// <param name="targetMember">Target member name</param>
/// <param name="targetName">Target node name</param>
BindingDefinition splitBindingExp(NodeAddress sourceNA, string sourceMember, string expression)
{
BindingDefinition bindingDef = new BindingDefinition(sourceNA, sourceMember);
if (string.IsNullOrEmpty (expression)) {
return bindingDef;
} else {
if (expression.StartsWith ("²")) {
bindingDef.TwoWay = true;
expression = expression.Substring (1);
}
string[] bindingExp = expression.Split ('/');
if (bindingExp.Length > 1)
bindingDef.TargetNA = CompilerServices.getNodeAdressFromBindingExp (sourceNA, bindingExp);
string [] bindTrg = bindingExp.Last().Split ('.');
if (bindTrg.Length == 1)
bindingDef.TargetMember = bindTrg [0];
else if (bindTrg.Length == 2) {
//named target
bindingDef.TargetName = bindTrg[0];
bindingDef.TargetMember = bindTrg [1];
} else
throw new Exception ("Syntax error in binding, expected 'go dot member'");
}
return bindingDef;
}
/// <summary>
/// create the valuechanged handler, the datasourcechanged handler and emit event handling
/// </summary>
void emitDataSourceBindings(Context ctx, BindingDefinition bindingDef)
{
DynamicMethod dm = null;
ILGenerator il = null;
int dmVC = 0;
PropertyInfo piSource = ctx.CurrentNodeType.GetProperty(bindingDef.SourceMember);
//if no dataSource member name is provided, valuechange is not handle and datasource change
//will be used as origine value
string delName = "dyn_DSvalueChanged" + NewId;
if (!string.IsNullOrEmpty(bindingDef.TargetMember)){
#region create valuechanged method
dm = new DynamicMethod (delName,
typeof (void),
CompilerServices.argsBoundValueChange, true);
il = dm.GetILGenerator (256);
System.Reflection.Emit.Label endMethod = il.DefineLabel ();
il.DeclareLocal (CompilerServices.TObject);
il.Emit (OpCodes.Nop);
//load value changed member name onto the stack
il.Emit (OpCodes.Ldarg_2);
il.Emit (OpCodes.Ldfld, CompilerServices.fiVCMbName);
//test if it's the expected one
il.Emit (OpCodes.Ldstr, bindingDef.TargetMember);
il.Emit (OpCodes.Ldc_I4_4);//StringComparison.Ordinal
il.Emit (OpCodes.Callvirt, CompilerServices.stringEquals);
il.Emit (OpCodes.Brfalse, endMethod);
//set destination member with valueChanged new value
//load destination ref
il.Emit (OpCodes.Ldarg_0);
//load new value onto the stack
il.Emit (OpCodes.Ldarg_2);
il.Emit (OpCodes.Ldfld, CompilerServices.fiVCNewValue);
//by default, source value type is deducted from target member type to allow
//memberless binding, if targetMember exists, it will be used to determine target
//value type for conversion
CompilerServices.emitConvert (il, piSource.PropertyType);
il.Emit (OpCodes.Callvirt, piSource.GetSetMethod ());
il.MarkLabel (endMethod);
il.Emit (OpCodes.Ret);
//vc dyn meth is stored in a cached list, it will be bound to datasource only
//when datasource of source graphic object changed
dmVC = dsValueChangedDynMeths.Count;
dsValueChangedDynMeths.Add (dm);
#endregion
}
#region emit dataSourceChanged event handler
//now we create the datasource changed method that will init the destination member with
//the actual value of the origin member of the datasource and then will bind the value changed
//dyn methode.
//dm is bound to the instanciator instance to have access to cached dyn meth and delegates
dm = new DynamicMethod ("dyn_dschanged",
typeof (void),
CompilerServices.argsBoundDSChange, true);
il = dm.GetILGenerator (256);
il.DeclareLocal (CompilerServices.TObject);//used for checking propery less bindings
il.DeclareLocal (typeof(MemberInfo));//used for checking propery less bindings
System.Reflection.Emit.Label cancel = il.DefineLabel ();
System.Reflection.Emit.Label cancelInit = il.DefineLabel ();
il.Emit (OpCodes.Nop);
emitRemoveOldDataSourceHandler(il, "ValueChanged", delName);
if (!string.IsNullOrEmpty(bindingDef.TargetMember)){
if (bindingDef.TwoWay){
System.Reflection.Emit.Label cancelRemove = il.DefineLabel ();
//remove handler if not null
il.Emit (OpCodes.Ldarg_2);//load old parent
il.Emit (OpCodes.Ldfld, CompilerServices.fiDSCOldDS);
il.Emit (OpCodes.Brfalse, cancelRemove);//old parent is null
//remove handler
il.Emit (OpCodes.Ldarg_2);//1st arg load old datasource
il.Emit (OpCodes.Ldfld, CompilerServices.fiDSCOldDS);
il.Emit (OpCodes.Ldstr, "ValueChanged");//2nd arg event name
il.Emit (OpCodes.Ldarg_1);//3d arg: instance bound to delegate (the source)
il.Emit (OpCodes.Call, CompilerServices.miRemEvtHdlByTarget);
il.MarkLabel(cancelRemove);
}
il.Emit (OpCodes.Ldarg_2);//load datasource change arg
il.Emit (OpCodes.Ldfld, CompilerServices.fiDSCNewDS);
il.Emit (OpCodes.Brfalse, cancel);//new ds is null
}
#region fetch initial Value
if (!string.IsNullOrEmpty(bindingDef.TargetMember)){
il.Emit (OpCodes.Ldarg_2);//load new datasource
il.Emit (OpCodes.Ldfld, CompilerServices.fiDSCNewDS);
il.Emit (OpCodes.Ldstr, bindingDef.TargetMember);//load member name
il.Emit (OpCodes.Call, CompilerServices.miGetMembIinfoWithRefx);
il.Emit (OpCodes.Stloc_1);//save memberInfo
il.Emit (OpCodes.Ldloc_1);//push mi for test if null
il.Emit (OpCodes.Brfalse, cancelInit);//propertyLessBinding
}
il.Emit (OpCodes.Ldarg_1);//load source of dataSourceChanged which is the dest instance
il.Emit (OpCodes.Ldarg_2);//load new datasource
il.Emit (OpCodes.Ldfld, CompilerServices.fiDSCNewDS);
if (!string.IsNullOrEmpty(bindingDef.TargetMember)){
il.Emit (OpCodes.Ldloc_1);//push mi for value fetching
il.Emit (OpCodes.Call, CompilerServices.miGetValWithRefx);
}
CompilerServices.emitConvert (il, piSource.PropertyType);
il.Emit (OpCodes.Callvirt, piSource.GetSetMethod ());
#endregion
if (!string.IsNullOrEmpty(bindingDef.TargetMember)){
il.MarkLabel(cancelInit);
//check if new dataSource implement IValueChange
il.Emit (OpCodes.Ldarg_2);//load new datasource
il.Emit (OpCodes.Ldfld, CompilerServices.fiDSCNewDS);
il.Emit (OpCodes.Isinst, typeof(IValueChange));
il.Emit (OpCodes.Brfalse, cancel);
il.Emit(OpCodes.Ldarg_0);//load ref to this instanciator onto the stack
il.Emit (OpCodes.Ldarg_1);//load datasource change source
il.Emit (OpCodes.Ldarg_2);//load new datasource
il.Emit (OpCodes.Ldfld, CompilerServices.fiDSCNewDS);
il.Emit(OpCodes.Ldc_I4, dmVC);//load index of dynmathod
il.Emit (OpCodes.Call, CompilerServices.miDSChangeEmitHelper);
if (bindingDef.TwoWay){
il.Emit (OpCodes.Ldarg_1);//arg1: dataSourceChange source, the origine of the binding
il.Emit (OpCodes.Ldstr, bindingDef.SourceMember);//arg2: orig member
il.Emit (OpCodes.Ldarg_2);//arg3: new datasource
il.Emit (OpCodes.Ldfld, CompilerServices.fiDSCNewDS);
il.Emit (OpCodes.Ldstr, bindingDef.TargetMember);//arg4: dest member
il.Emit (OpCodes.Call, CompilerServices.miDSReverseBinding);
}
il.MarkLabel (cancel);
}
il.Emit (OpCodes.Ret);
//store dschange delegate in instatiator instance for access while instancing graphic object
int delDSIndex = cachedDelegates.Count;
cachedDelegates.Add(dm.CreateDelegate (CompilerServices.ehTypeDSChange, this));
#endregion
ctx.emitCachedDelegateHandlerAddition(delDSIndex, CompilerServices.eiDSChange);
}
