/// <summary>
/// Returns a copy of this string with text replaced using a replacement function.
/// </summary>
/// <param name="thisObject"></param>
/// <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.CallFromNative("replace", 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.m_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.CallFromNative("replace", null, parameters));
}, this.Global ? int.MaxValue : 1));
}
/// <summary>
/// Returns a copy of this string with text replaced using a regular expression and a
/// replacement function.
/// </summary>
/// <param name="thisObject"></param>
/// <param name="regExp"> The regular expression 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 using a regular expression. </returns>
public static string Replace(string thisObject, RegExpInstance regExp, FunctionInstance replaceFunction)
{
return(regExp.Replace(thisObject, replaceFunction));
}
/// <summary>
/// Creates a new PropertyDescriptor instance with a getter function and, optionally, a
/// setter function.
/// </summary>
/// <param name="getter"> The function to call to retrieve the property value. </param>
/// <param name="setter"> The function to call to set the property value. </param>
/// <param name="attributes"> The property attributes (whether the property is writable or
/// not is implied by whether there is a setter function). </param>
public PropertyDescriptor(FunctionInstance getter, FunctionInstance setter, PropertyAttributes attributes)
: this(new PropertyAccessorValue(getter, setter), attributes)
{
}
// OBJECT SERIALIZATION AND DESERIALIZATION
//_________________________________________________________________________________________
/// <summary>
/// Creates a property descriptor from an object containing any of the following
/// properties: configurable, writable, enumerable, value, get, set.
/// </summary>
/// <param name="obj"> The object to get the property values from. </param>
/// <param name="defaults"> The values to use if the relevant value is not specified. </param>
/// <returns> A PropertyDescriptor that corresponds to the object. </returns>
public static PropertyDescriptor FromObject(ObjectInstance obj, PropertyDescriptor defaults)
{
if (obj == null)
{
return(PropertyDescriptor.Undefined);
}
// Read configurable attribute.
bool configurable = defaults.IsConfigurable;
if (obj.HasProperty("configurable"))
{
configurable = TypeConverter.ToBoolean(obj["configurable"]);
}
// Read writable attribute.
bool writable = defaults.IsWritable;
if (obj.HasProperty("writable"))
{
writable = TypeConverter.ToBoolean(obj["writable"]);
}
// Read enumerable attribute.
bool enumerable = defaults.IsEnumerable;
if (obj.HasProperty("enumerable"))
{
enumerable = TypeConverter.ToBoolean(obj["enumerable"]);
}
// Read property value.
object value = defaults.Value;
if (obj.HasProperty("value"))
{
value = obj["value"];
}
// The descriptor is an accessor if get or set is present.
bool isAccessor = false;
// Read get accessor.
FunctionInstance getter = defaults.Getter;
if (obj.HasProperty("get"))
{
if (obj.HasProperty("value"))
{
throw new JavaScriptException(obj.Engine, "TypeError", "Property descriptors cannot have both 'get' and 'value' set");
}
if (obj.HasProperty("writable"))
{
throw new JavaScriptException(obj.Engine, "TypeError", "Property descriptors with 'get' or 'set' defined must not have 'writable' set");
}
if (obj["get"] is FunctionInstance)
{
getter = (FunctionInstance)obj["get"];
}
else if (TypeUtilities.IsUndefined(obj["get"]))
{
getter = null;
}
else
{
throw new JavaScriptException(obj.Engine, "TypeError", "Property descriptor 'get' must be a function");
}
isAccessor = true;
}
// Read set accessor.
FunctionInstance setter = defaults.Setter;
if (obj.HasProperty("set"))
{
if (obj.HasProperty("value"))
{
throw new JavaScriptException(obj.Engine, "TypeError", "Property descriptors cannot have both 'set' and 'value' set");
}
if (obj.HasProperty("writable"))
{
throw new JavaScriptException(obj.Engine, "TypeError", "Property descriptors with 'get' or 'set' defined must not have 'writable' set");
}
if (obj["set"] is FunctionInstance)
{
setter = (FunctionInstance)obj["set"];
}
else if (TypeUtilities.IsUndefined(obj["set"]))
{
setter = null;
}
else
{
throw new JavaScriptException(obj.Engine, "TypeError", "Property descriptor 'set' must be a function");
}
isAccessor = true;
}
// Build up the attributes enum.
PropertyAttributes attributes = PropertyAttributes.Sealed;
if (configurable)
{
attributes |= PropertyAttributes.Configurable;
}
if (writable)
{
attributes |= PropertyAttributes.Writable;
}
if (enumerable)
{
attributes |= PropertyAttributes.Enumerable;
}
// Either a value or an accessor is possible.
object descriptorValue = value;
if (isAccessor)
{
descriptorValue = new PropertyAccessorValue(getter, setter);
}
// Create the new property descriptor.
return(new PropertyDescriptor(descriptorValue, attributes));
}
/// <summary>
/// Creates a new PropertyAccessorValue instance.
/// </summary>
/// <param name="getter"> The getter function, or <c>null</c> if no getter was provided. </param>
/// <param name="setter"> The setter function, or <c>null</c> if no setter was provided. </param>
public PropertyAccessorValue(FunctionInstance getter, FunctionInstance setter)
{
this.m_getter = getter;
this.m_setter = setter;
}
// INITIALIZATION
//_________________________________________________________________________________________
/// <summary>
/// Creates a new Function object.
/// </summary>
/// <param name="prototype"> The next object in the prototype chain. </param>
/// <param name="instancePrototype"> The prototype for instances created by this function. </param>
internal FunctionConstructor(ObjectInstance prototype, FunctionInstance instancePrototype)
: base(prototype, "Function", instancePrototype)
{
}
