private void ComponentDidUpdate(WrappedValue <TProps> previousProps)
{
ComponentDidUpdate(ComponentPropsHelpers.UnWrapValueIfDefined(previousProps));
}
private bool ShouldComponentUpdate(WrappedValue <TProps> nextPropsIfAny)
{
return(!ComponentPropsHelpers.DoPropsReferencesMatch(this.props, ComponentPropsHelpers.UnWrapValueIfDefined(nextPropsIfAny)));
}
private void ComponentWillUpdate(WrappedValue <TProps> nextProps)
{
ComponentWillUpdate(ComponentPropsHelpers.UnWrapValueIfDefined(nextProps));
}
// These are the life cycle methods that React calls - they have to unwrap the props and state references (if provided) in order to pass them on to the methods above
// (the life cycle methods that derived classes may make use of)
private void ComponentWillReceiveProps(WrappedValue <TProps> nextPropsIfAny)
{
ComponentWillReceiveProps(ComponentPropsHelpers.UnWrapValueIfDefined(nextPropsIfAny));
}
private bool ShouldComponentUpdate(WrappedValue <TProps> nextPropsIfAny, WrappedValue <TState> nextStateIfAny)
{
return(ShouldComponentUpdate(ComponentPropsHelpers.UnWrapValueIfDefined(nextPropsIfAny), ComponentPropsHelpers.UnWrapValueIfDefined(nextStateIfAny)));
}
public static TProps UnWrapValueIfDefined <TProps>(WrappedValue <TProps> wrappedValueIfAny)
{
return(Script.Write <TProps>("{0} ? {0}.value : null", wrappedValueIfAny));
}
public static WrappedValue <TProps> WrapProps <TProps>(TProps propsIfAny)
{
// Try to extract a Key value from the props - it might be a simple "key" value or it might be a property with a "getKey" function or it
// might be absent altogether
Union <string, int> keyIfAny = null;
Action <object> refIfAny = null;
if (propsIfAny != null)
{
// Pre-16, Bridge used to default to camel-casing property names and so a "Key" property would be named "key" and it would have a getter method
// specified for it (it was possible to override these behaviours using PreserveMemberCase and [Name], [Template] or [FieldProperty] attributes)
// but 16 has changed things such that the name casing is not changed (by default - this may also be altered using the "conventions" options)
// and so we can't presume that a "Key" property will result in a JavaScript "key" property (or a "getKey" method).
Script.Write(@"
if (propsIfAny.key || (propsIfAny.key === 0)) { // Ensure that a zero key is not considered ""no-key-defined""
keyIfAny = propsIfAny.key;
}
else if (propsIfAny.Key || (propsIfAny.Key === 0)) { // Ensure that a zero key is not considered ""no-key-defined""
keyIfAny = propsIfAny.Key;
}
else if (propsIfAny.getKey && (typeof(propsIfAny.getKey) == ""function"")) {
var keyIfAnyFromPropertyGetter = propsIfAny.getKey();
if (keyIfAnyFromPropertyGetter || (keyIfAnyFromPropertyGetter === 0)) { // Ensure that a zero key is not considered ""no-key-defined""
keyIfAny = keyIfAnyFromPropertyGetter;
}
else {
keyIfAny = undefined;
}
}
else {
keyIfAny = undefined;
}
if (typeof(propsIfAny.ref) === ""function"") {
refIfAny = propsIfAny.ref;
}
else if (typeof(propsIfAny.Ref) === ""function"") {
refIfAny = propsIfAny.Ref;
}
else if (typeof(propsIfAny.getRef) === ""function"") {
var refIfAnyFromPropertyGetter = propsIfAny.getRef();
if (typeof(refIfAnyFromPropertyGetter) === ""function"") {
refIfAny = refIfAnyFromPropertyGetter;
}
else {
refIfAny = undefined;
}
}
else {
refIfAny = undefined;
}
" );
}
// With the changes in React 15.0.0 (vs 0.14.7), a null Key value will be interpreted AS a key (and will either be ".$null" or ".$undefined")
// when really we want a null Key to mean NO KEY. Possibly related to https://github.com/facebook/react/issues/2386, but I would have expected
// to have seen this issue in 0.14 if it was that. The workaround is to return a type of "wrapped props" that doesn't even have a Key property
// on it if there is no key value to use.
var wrappedProps = new WrappedValue <TProps> {
Value = propsIfAny
};
if (Script.Write <bool>("(typeof({0}) !== 'undefined')", keyIfAny))
{
Script.Write("{0}.key = {1}", wrappedProps, keyIfAny);
}
if (Script.Write <bool>("(typeof({0}) !== 'undefined')", refIfAny))
{
Script.Write("{0}.ref = {1}", wrappedProps, refIfAny);
}
return(wrappedProps);
}
