Implements #23. Unit tests still pass, but they don't as yet include …

…implicit tests for this new functionality.
brightsg · Feb 6, 2019 · df94f63 · df94f63
1 parent 36a8712
commit df94f63
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diff --git a/Framework/XCode/Representations/DBManagedObject.h b/Framework/XCode/Representations/DBManagedObject.h
@@ -309,5 +309,7 @@ extern char DBCacheSuffixChar;
 + (const char *)monoClassTypeName:(MonoClass *)klass;
 + (void)registerInternalCall:(NSString *)methodName callPointer:(void *)callPointer;
 
+- (void)addMonoEventHandler:(MonoObject*)eventHandler toEventNamed:(NSString*)eventName;
+- (void)removeMonoEventHandler:(MonoObject*)eventHandler fromEventNamed:(NSString*)eventName;
 
 @end
diff --git a/Framework/XCode/Representations/DBManagedObject.m b/Framework/XCode/Representations/DBManagedObject.m
@@ -1346,4 +1346,22 @@ - (void)setAutomaticallyNotifiesObserversOfManagedPropertyChanges:(BOOL)value
     }
 }
 
+- (void)addMonoEventHandler:(MonoObject*)eventHandler toEventNamed:(NSString*)eventName
+{
+    MonoObject* monoType = [self invokeMonoMethod:"GetType()" withNumArgs:0];
+    DBManagedObject* dbType = [DBManagedObject objectWithMonoObject:monoType];
+
+    MonoObject* monoEventInfo = [dbType invokeMonoMethod:"System.Reflection.GetEvent(string)" withNumArgs:1, eventName.monoRTInvokeArg];
+    DBManagedObject* eventInfo = [DBManagedObject objectWithMonoObject:monoEventInfo];
+    [eventInfo invokeMonoMethod:"System.Reflection.EventInfo.AddEventHandler(object,System.Delegate)" withNumArgs:2, self.monoObject, eventHandler];
+}
+
+- (void)removeMonoEventHandler:(MonoObject*)eventHandler fromEventNamed:(NSString*)eventName
+{
+    MonoObject* monoType = [self invokeMonoMethod:"GetType()" withNumArgs:0];
+    DBManagedObject* dbType = [DBManagedObject objectWithMonoObject:monoType];
+    MonoObject* monoEventInfo = [dbType invokeMonoMethod:"System.Reflection.GetEvent(string)" withNumArgs:1, eventName.monoRTInvokeArg];
+    DBManagedObject* eventInfo = [DBManagedObject objectWithMonoObject:monoEventInfo];
+    [eventInfo invokeMonoMethod:"System.Reflection.EventInfo.RemoveEventHandler(object,System.Delegate)" withNumArgs:2, self.monoObject, eventHandler];
+}
 @end
diff --git a/Mono.mscorlib/Mono.mscorlib/Categories/System_Object+mscorlib.h b/Mono.mscorlib/Mono.mscorlib/Categories/System_Object+mscorlib.h
@@ -9,6 +9,8 @@
 #import "System_Object.h"
 #import "System_Type.h"
 
+@class System_Delegate;
+
 @interface System_Object (mscorlib)
 
 /**
@@ -98,4 +100,7 @@
 - (uint32_t)unsigned32Value;
 - (uint64_t)unsigned64Value;
 
+- (void)addEventHandler:(System_Delegate *)eventHandler toEventNamed:(NSString *)eventName;
+- (void)removeEventHandler:(System_Delegate *)eventHandler fromEventNamed:(NSString *)eventName;
+- (NSArray<System_Delegate *> *)eventHandlersForEventNamed:(NSString *)eventName;
 @end
diff --git a/Mono.mscorlib/Mono.mscorlib/Categories/System_Object+mscorlib.m b/Mono.mscorlib/Mono.mscorlib/Categories/System_Object+mscorlib.m
@@ -10,6 +10,8 @@
 #import "System_Convert+mscorlib.h"
 #import "System_Type+mscorlib.h"
 #import "DBGenericTypeHelper.h"
+#import "System_Delegate.h"
+#import <objc/runtime.h>
 
 @implementation System_Object (mscorlib)
 
@@ -116,4 +118,90 @@ - (uint64_t)unsigned64Value {
 	return([System_Convert convertMonoObjectToUInt64:self.monoObject]);
 }
 
+#pragma mark -
+#pragma mark Events
+
+- (NSMutableDictionary<NSString *, NSMutableArray<System_Delegate *> *> *)eventHandlers
+{
+    NSMutableDictionary *handlers = objc_getAssociatedObject(self, @selector(eventHandlers));
+    if (!handlers) {
+        handlers = NSMutableDictionary.dictionary;
+        objc_setAssociatedObject(self, @selector(eventHandlers), handlers, OBJC_ASSOCIATION_RETAIN);
+    }
+
+    return handlers;
+}
+
+- (void)addEventHandler:(System_Delegate *)eventHandler toEventNamed:(NSString *)eventName
+{
+    BOOL success = NO;
+
+    @try {
+        [self addMonoEventHandler:eventHandler.monoObject toEventNamed:eventName];
+
+        success = YES;
+    }
+    @catch (NSException *ex) {
+        NSLog(@"%@:%s : %@", self.className, __FUNCTION__, ex.reason);
+    }
+
+    if (!success) {
+        return;
+    }
+
+    [self cacheEventHandler:eventHandler forEventNamed:eventName];
+}
+
+- (void)cacheEventHandler:(System_Delegate *)eventHandler forEventNamed:(NSString *)eventName
+{
+    NSMutableArray<System_Delegate *> *handlers = [self.eventHandlers objectForKey:eventName];
+
+    if (!handlers) {
+        handlers = NSMutableArray.array;
+        self.eventHandlers[eventName] = handlers;
+    }
+
+    [handlers addObject:eventHandler];
+}
+
+- (void)removeEventHandler:(System_Delegate *)eventHandler fromEventNamed:(NSString *)eventName
+{
+    BOOL success = NO;
+
+    @try {
+        [self removeMonoEventHandler:eventHandler.monoObject fromEventNamed:eventName];
+        success = YES;
+    }
+    @catch (NSException *ex) {
+        NSLog(@"%@:%s : %@", self.className, __FUNCTION__, ex.reason);
+    }
+
+    if (!success) {
+        return;
+    }
+
+    [self uncacheEventHandler:eventHandler forEventNamed:eventName];
+}
+
+- (void)uncacheEventHandler:(System_Delegate *)eventHandler forEventNamed:(NSString *)eventName
+{
+    NSMutableArray<System_Delegate *> * handlers = [self.eventHandlers objectForKey:eventName];
+
+    if (!handlers) {
+        return;
+    }
+
+    [handlers removeObject:eventHandler];
+
+    if (handlers.count <= 0) {
+        [self.eventHandlers removeObjectForKey:eventName];
+    }
+}
+
+- (NSArray<System_Delegate *> *)eventHandlersForEventNamed:(NSString *)eventName
+{
+    NSArray<System_Delegate*>* handlers = [self.eventHandlers objectForKey:eventName];
+
+    return handlers;
+}
 @end