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| #define HANDLE_NODE_RESPONDER_METHOD(__sel) \
/* All responder methods should be called on the main thread */ \
ASDisplayNodeAssertMainThread(); \
if (checkFlag(Synchronous)) { \
/* If the view is not a _ASDisplayView subclass (Synchronous) just call through to the view as we
expect it's a non _ASDisplayView subclass that will respond */ \
return [_view __sel]; \
} else { \
if (ASSubclassOverridesSelector([_ASDisplayView class], _viewClass, @selector(__sel))) { \
/* If the subclass overwrites canBecomeFirstResponder just call through
to it as we expect it will handle it */ \
return [_view __sel]; \
} else { \
/* Call through to _ASDisplayView's superclass to get it handled */ \
return [(_ASDisplayView *)_view __##__sel]; \
} \
} \
|
checkResponderCompatibility
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| - (void)checkResponderCompatibility
{
#if ASDISPLAYNODE_ASSERTIONS_ENABLED
// There are certain cases we cannot handle and are not supported:
// 1. If the _view class is not a subclass of _ASDisplayView
if (checkFlag(Synchronous)) {
// 2. At least one UIResponder methods are overwritten in the node subclass
NSString *message = @"Overwritting %@ and having a backing view that is not an _ASDisplayView is not supported.";
ASDisplayNodeAssert(!ASDisplayNodeSubclassOverridesSelector(self.class, @selector(canBecomeFirstResponder)), ([NSString stringWithFormat:message, @"canBecomeFirstResponder"]));
ASDisplayNodeAssert(!ASDisplayNodeSubclassOverridesSelector(self.class, @selector(becomeFirstResponder)), ([NSString stringWithFormat:message, @"becomeFirstResponder"]));
ASDisplayNodeAssert(!ASDisplayNodeSubclassOverridesSelector(self.class, @selector(canResignFirstResponder)), ([NSString stringWithFormat:message, @"canResignFirstResponder"]));
ASDisplayNodeAssert(!ASDisplayNodeSubclassOverridesSelector(self.class, @selector(resignFirstResponder)), ([NSString stringWithFormat:message, @"resignFirstResponder"]));
ASDisplayNodeAssert(!ASDisplayNodeSubclassOverridesSelector(self.class, @selector(isFirstResponder)), ([NSString stringWithFormat:message, @"isFirstResponder"]));
}
#endif
}
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__canBecomeFirstResponder
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| - (BOOL)__canBecomeFirstResponder
{
if (_view == nil) {
// By default we return NO if not view is created yet
return NO;
}
HANDLE_NODE_RESPONDER_METHOD(canBecomeFirstResponder);
}
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__becomeFirstResponder
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| - (BOOL)__becomeFirstResponder
{
// Note: This implicitly loads the view if it hasn't been loaded yet.
[self view];
if (![self canBecomeFirstResponder]) {
return NO;
}
HANDLE_NODE_RESPONDER_METHOD(becomeFirstResponder);
}
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__canResignFirstResponder
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| - (BOOL)__canResignFirstResponder
{
if (_view == nil) {
// By default we return YES if no view is created yet
return YES;
}
HANDLE_NODE_RESPONDER_METHOD(canResignFirstResponder);
}
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__resignFirstResponder
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| - (BOOL)__resignFirstResponder
{
// Note: This implicitly loads the view if it hasn't been loaded yet.
[self view];
if (![self canResignFirstResponder]) {
return NO;
}
HANDLE_NODE_RESPONDER_METHOD(resignFirstResponder);
}
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__isFirstResponder
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| - (BOOL)__isFirstResponder
{
if (_view == nil) {
// If no view is created yet we can just return NO as it's unlikely it's the first responder
return NO;
}
HANDLE_NODE_RESPONDER_METHOD(isFirstResponder);
}
|
