| public abstract CallLateBound ( object thisObject ) : object | ||
| thisObject | object | The value of the "this" keyword within the function. |
| return | object | |
/// <summary>
/// Calls this function, passing in the given "this" value and zero or more arguments.
/// </summary>
/// <param name="thisObject"> The value of the "this" keyword within the function. </param>
/// <param name="argumentValues"> An array of argument values. </param>
/// <returns> The value that was returned from the function. </returns>
public override object CallLateBound(object thisObject, params object[] argumentValues)
{
// Check for revocation.
if (target == null || handler == null)
{
throw new JavaScriptException(ErrorType.TypeError, "Cannot call 'apply' on a proxy that has been revoked.");
}
// Call the handler, if one exists.
var trap = handler.GetMethod("apply");
if (trap == null)
{
return(target.CallLateBound(thisObject, argumentValues));
}
var array = Engine.Array.New(argumentValues);
return(trap.CallLateBound(handler, target, thisObject, array));
}
/// <summary>
/// Returns a copy of this string with text replaced using a replacement function.
/// </summary>
/// <param name="substr"> The text to search for. </param>
/// <param name="replaceFunction"> A function that is called to produce the text to replace
/// for every successful match. </param>
/// <returns> A copy of this string with text replaced. </returns>
public static string Replace(string thisObject, string substr, FunctionInstance replaceFunction)
{
// Find the first occurrance of substr.
int start = thisObject.IndexOf(substr, StringComparison.Ordinal);
if (start == -1)
{
return(thisObject);
}
int end = start + substr.Length;
// Get the replacement text from the provided function.
var replaceText = TypeConverter.ToString(replaceFunction.CallLateBound(null, substr, start, thisObject));
// Replace only the first match.
var result = new System.Text.StringBuilder(thisObject.Length + (replaceText.Length - substr.Length));
result.Append(thisObject, 0, start);
result.Append(replaceText);
result.Append(thisObject, end, thisObject.Length - end);
return(result.ToString());
}
/// <summary>
/// Returns a copy of the given string with text replaced using a regular expression.
/// </summary>
/// <param name="input"> The string on which to perform the search. </param>
/// <param name="replaceFunction"> A function that is called to produce the text to replace
/// for every successful match. </param>
/// <returns> A copy of the given string with text replaced using a regular expression. </returns>
public string Replace(string input, FunctionInstance replaceFunction)
{
return(this.value.Replace(input, match =>
{
// Set the deprecated RegExp properties.
this.Engine.RegExp.SetDeprecatedProperties(input, match);
object[] parameters = new object[match.Groups.Count + 2];
for (int i = 0; i < match.Groups.Count; i++)
{
if (match.Groups[i].Success == false)
{
parameters[i] = Undefined.Value;
}
else
{
parameters[i] = match.Groups[i].Value;
}
}
parameters[match.Groups.Count] = match.Index;
parameters[match.Groups.Count + 1] = input;
return TypeConverter.ToString(replaceFunction.CallLateBound(null, parameters));
}, this.Global == true ? int.MaxValue : 1));
}
public static bool Some(ObjectInstance thisObj, FunctionInstance callbackFunction, [DefaultParameterValue(null)] ObjectInstance context = null)
{
// callbackFunction must be a valid function.
if (callbackFunction == null)
throw new JavaScriptException(thisObj.Engine, "TypeError", "Invalid callback function");
// Get the length of the array.
uint arrayLength = GetLength(thisObj);
// This method only supports arrays of length up to 2^31-1.
if (arrayLength > int.MaxValue)
throw new JavaScriptException(thisObj.Engine, "RangeError", "The array is too long");
for (int i = 0; i < arrayLength; i++)
{
// Get the value of the array element.
object elementValue = thisObj[(uint)i];
// Only call the callback function for array elements that exist in the array.
if (elementValue != null)
{
// Call the callback function.
if (TypeConverter.ToBoolean(callbackFunction.CallLateBound(context, elementValue, i, thisObj)) == true)
return true;
}
}
return false;
}
public static object ReduceRight(ObjectInstance thisObj, FunctionInstance callbackFunction, [DefaultParameterValue(null)] object initialValue = null)
{
// callbackFunction must be a valid function.
if (callbackFunction == null)
throw new JavaScriptException(thisObj.Engine, "TypeError", "Invalid callback function");
// Get the length of the array.
uint arrayLength = GetLength(thisObj);
// This method only supports arrays of length up to 2^31-1.
if (arrayLength > int.MaxValue)
throw new JavaScriptException(thisObj.Engine, "RangeError", "The array is too long");
// If an initial value is not provided, the initial value is the last (defined) element.
int i = (int)arrayLength - 1;
object accumulatedValue = initialValue;
if (accumulatedValue == null)
{
// Scan for a defined element.
for (; i >= 0; i--)
{
if (thisObj[(uint)i] != null)
{
accumulatedValue = thisObj[(uint)(i--)];
break;
}
}
if (accumulatedValue == null)
throw new JavaScriptException(thisObj.Engine, "TypeError", "Reduce of empty array with no initial value");
}
// Scan from high to to low.
for (; i >= 0; i--)
{
// Get the value of the array element.
object elementValue = thisObj[(uint)i];
// Only call the callback function for array elements that exist in the array.
if (elementValue != null)
{
// Call the callback function.
accumulatedValue = callbackFunction.CallLateBound(Undefined.Value, accumulatedValue, elementValue, i, thisObj);
}
}
return accumulatedValue;
}
public static ArrayInstance Map(ObjectInstance thisObj, FunctionInstance callbackFunction, [DefaultParameterValue(null)] ObjectInstance context = null)
{
// callbackFunction must be a valid function.
if (callbackFunction == null)
throw new JavaScriptException(thisObj.Engine, "TypeError", "Invalid callback function");
// Get the length of the array.
uint arrayLength = GetLength(thisObj);
// This method only supports arrays of length up to 2^31-1.
if (arrayLength > int.MaxValue)
throw new JavaScriptException(thisObj.Engine, "RangeError", "The array is too long");
// Create a new array to hold the new values.
// The length of the output array is always equal to the length of the input array.
var resultArray = new ArrayInstance(thisObj.Engine.Array.InstancePrototype, arrayLength, arrayLength);
for (int i = 0; i < arrayLength; i++)
{
// Get the value of the array element.
object elementValue = thisObj[(uint)i];
// Only call the callback function for array elements that exist in the array.
if (elementValue != null)
{
// Call the callback function.
object result = callbackFunction.CallLateBound(context, elementValue, i, thisObj);
// Store the result.
resultArray[(uint)i] = result;
}
}
return resultArray;
}
public static ArrayInstance Filter(ObjectInstance thisObj, FunctionInstance callbackFunction, [DefaultParameterValue(null)] ObjectInstance context = null)
{
// callbackFunction must be a valid function.
if (callbackFunction == null)
throw new JavaScriptException(thisObj.Engine, "TypeError", "Invalid callback function");
// Get the length of the array.
uint arrayLength = GetLength(thisObj);
// This method only supports arrays of length up to 2^31-1.
if (arrayLength > int.MaxValue)
throw new JavaScriptException(thisObj.Engine, "RangeError", "The array is too long");
// Create a new array to hold the new values.
var result = thisObj.Engine.Array.New();
for (int i = 0; i < arrayLength; i++)
{
// Get the value of the array element.
object elementValue = thisObj[(uint)i];
// Only call the callback function for array elements that exist in the array.
if (elementValue != null)
{
// Call the callback function.
bool includeInArray = TypeConverter.ToBoolean(callbackFunction.CallLateBound(context, elementValue, i, thisObj));
// Store the result if the callback function returned true.
if (includeInArray == true)
result.Push(elementValue);
}
}
return result;
}
public static object Apply(FunctionInstance target, object thisArgument, ObjectInstance argumentsList)
{
return(target.CallLateBound(thisArgument, TypeUtilities.CreateListFromArrayLike(argumentsList)));
}
/// <summary>
/// Returns a copy of this string with text replaced using a replacement function.
/// </summary>
/// <param name="substr"> The text to search for. </param>
/// <param name="replaceFunction"> A function that is called to produce the text to replace
/// for every successful match. </param>
/// <returns> A copy of this string with text replaced. </returns>
public static string Replace(string thisObject, string substr, FunctionInstance replaceFunction)
{
// Find the first occurrance of substr.
int start = thisObject.IndexOf(substr, StringComparison.Ordinal);
if (start == -1)
return thisObject;
int end = start + substr.Length;
// Get the replacement text from the provided function.
var replaceText = TypeConverter.ToString(replaceFunction.CallLateBound(null, substr, start, thisObject));
// Replace only the first match.
var result = new System.Text.StringBuilder(thisObject.Length + (replaceText.Length - substr.Length));
result.Append(thisObject, 0, start);
result.Append(replaceText);
result.Append(thisObject, end, thisObject.Length - end);
return result.ToString();
}
/// <summary>
/// Returns a copy of the given string with text replaced using a regular expression.
/// </summary>
/// <param name="input"> The string on which to perform the search. </param>
/// <param name="replaceFunction"> A function that is called to produce the text to replace
/// for every successful match. </param>
/// <returns> A copy of the given string with text replaced using a regular expression. </returns>
public string Replace(string input, FunctionInstance replaceFunction)
{
return this.value.Replace(input, match =>
{
// Set the deprecated RegExp properties.
this.Engine.RegExp.SetDeprecatedProperties(input, match);
object[] parameters = new object[match.Groups.Count + 2];
for (int i = 0; i < match.Groups.Count; i++)
{
if (match.Groups[i].Success == false)
parameters[i] = Undefined.Value;
else
parameters[i] = match.Groups[i].Value;
}
parameters[match.Groups.Count] = match.Index;
parameters[match.Groups.Count + 1] = input;
return TypeConverter.ToString(replaceFunction.CallLateBound(null, parameters));
}, this.Global == true ? int.MaxValue : 1);
}
public static ObjectInstance Sort([JSParameter(JSParameterFlags.Mutated)] ObjectInstance thisObj, FunctionInstance comparisonFunction = null)
{
// Get the length of the array.
uint arrayLength = GetLength(thisObj);
// An array of size 1 or less is already sorted.
if (arrayLength <= 1)
return thisObj;
// Create a comparer delegate.
Func<object, object, double> comparer;
if (comparisonFunction == null)
comparer = (a, b) =>
{
if (a == null && b == null)
return 0f;
if (a == null)
return 1f;
if (b == null)
return -1f;
if (a == Undefined.Value && b == Undefined.Value)
return 0f;
if (a == Undefined.Value)
return 1f;
if (b == Undefined.Value)
return -1f;
return string.Compare(TypeConverter.ToString(a), TypeConverter.ToString(b), StringComparison.Ordinal);
};
else
comparer = (a, b) =>
{
if (a == null && b == null)
return 0f;
if (a == null)
return 1f;
if (b == null)
return -1f;
if (a == Undefined.Value && b == Undefined.Value)
return 0f;
if (a == Undefined.Value)
return 1f;
if (b == Undefined.Value)
return -1f;
return TypeConverter.ToNumber(comparisonFunction.CallLateBound(thisObj.Engine.Global, a, b));
};
try
{
// Sort the array.
QuickSort(thisObj, comparer, 0, arrayLength - 1);
}
catch (IndexOutOfRangeException)
{
throw new JavaScriptException(thisObj.Engine, "TypeError", "Invalid comparison function");
}
return thisObj;
}
public static void ForEach(ObjectInstance thisObj, FunctionInstance callbackFunction, ObjectInstance context = null)
{
// callbackFunction must be a valid function.
if (callbackFunction == null)
throw new JavaScriptException(thisObj.Engine, "TypeError", "Invalid callback function");
// Get the length of the array.
uint arrayLength = GetLength(thisObj);
// This method only supports arrays of length up to 2^31-1.
if (arrayLength > int.MaxValue)
throw new JavaScriptException(thisObj.Engine, "RangeError", "The array is too long");
for (int i = 0; i < arrayLength; i++)
{
// Get the value of the array element.
object elementValue = thisObj[(uint)i];
// Only call the callback function for array elements that exist in the array.
if (elementValue != null)
{
// Call the callback function.
callbackFunction.CallLateBound(context, elementValue, i, thisObj);
}
}
}
