[Mac] Fix keyDown event (#13280)

* [Mac] Check for space key when keyDown isn't consumed

* [Mac] Make sure no text input event is send when a modifier is pressed

* [Mac] Refactor keyDown handling

* Move ignoreUserInput

* Handle keyDown for doCommandSelector

native/Avalonia.Native/src/OSX/AvnView.mm

@@ -15,7 +15,6 @@
     bool _isLeftPressed, _isMiddlePressed, _isRightPressed, _isXButton1Pressed, _isXButton2Pressed;
     AvnInputModifiers _modifierState;
     NSEvent* _lastMouseDownEvent;
-    bool _lastKeyConsumeByInputContext;
     AvnPixelSize _lastPixelSize;
     NSObject<IRenderTarget>* _currentRenderTarget;
     AvnPlatformResizeReason _resizeReason;
@@ -24,6 +23,7 @@
     NSMutableAttributedString* _text;
     NSRange _selectedRange;
     NSRange _markedRange;
+    NSEvent* _lastKeyDownEvent;
 }
 
 - (void)onClosed
@@ -461,13 +461,7 @@
     auto timestamp = static_cast<uint64_t>([event timestamp] * 1000);
     auto modifiers = [self getModifiers:[event modifierFlags]];
 
-    if(!_lastKeyConsumeByInputContext || key <= 32){
-        auto handled = _parent->BaseEvents->RawKeyEvent(type, timestamp, modifiers, key, physicalKey, keySymbolUtf8);
-        
-        if(type == KeyDown && !handled && keySymbolUtf8 != NULL){
-            _parent->BaseEvents->RawTextInputEvent(timestamp, keySymbolUtf8);
-        }
-    }
+    _parent->BaseEvents->RawKeyEvent(type, timestamp, modifiers, key, physicalKey, keySymbolUtf8);
 }
 
 - (void)flagsChanged:(NSEvent *)event
@@ -484,7 +478,6 @@
     bool isShiftPressed = (newModifierState & Shift) == Shift;
     bool isCommandPressed = (newModifierState & Windows) == Windows;
 
-
     if (isAltPressed && !isAltCurrentlyPressed)
     {
         [self keyboardEvent:event withType:KeyDown];
@@ -527,15 +520,61 @@
     [super flagsChanged:event];
 }
 
+- (bool) handleKeyDown: (NSTimeInterval) timestamp withKey:(AvnKey)key withPhysicalKey:(AvnPhysicalKey)physicalKey withModifiers:(AvnInputModifiers)modifiers withKeySymbol:(NSString*)keySymbol {
+    return _parent->BaseEvents->RawKeyEvent(KeyDown, timestamp, modifiers, key, physicalKey, [keySymbol UTF8String]);
+}
+
 - (void)keyDown:(NSEvent *)event
 {
-    _lastKeyConsumeByInputContext = false;
+    if([self ignoreUserInput: false] || _parent == nullptr)
+    {
+        return;
+    }
+    
+    _lastKeyDownEvent = event;
+    
+    auto timestamp = static_cast<uint64_t>([event timestamp] * 1000);
     
+    auto scanCode = [event keyCode];
+    auto key = VirtualKeyFromScanCode(scanCode, [event modifierFlags]);
+    auto physicalKey = PhysicalKeyFromScanCode(scanCode);
+    auto keySymbol = KeySymbolFromScanCode(scanCode, [event modifierFlags]);
+    
+    auto modifiers = [self getModifiers:[event modifierFlags]];
+    
+    //InputMethod is active
     if(_parent->InputMethod->IsActive()){
-        _lastKeyConsumeByInputContext = [[self inputContext] handleEvent:event] == YES;
+        auto hasInputModifier = modifiers != AvnInputModifiersNone;
+        
+        //Handle keyDown first if an input modifier is present
+        if(hasInputModifier){
+            if([self handleKeyDown:timestamp withKey:key withPhysicalKey:physicalKey withModifiers:modifiers withKeySymbol:keySymbol]){
+                //User code has handled the event
+                return;
+            }
+        }
+        
+        if([[self inputContext] handleEvent:event] == NO){
+            //KeyDown has not been consumed by the input context
+                
+            //Only raise a keyDown if we don't have a modifier
+            if(!hasInputModifier){
+                [self handleKeyDown:timestamp withKey:key withPhysicalKey:physicalKey withModifiers:modifiers withKeySymbol:keySymbol];
+            }
+        }
+        
+    }
+    //InputMethod not active
+    else{
+        auto keyDownHandled = [self handleKeyDown:timestamp withKey:key withPhysicalKey:physicalKey withModifiers:modifiers withKeySymbol:keySymbol];
+        
+        //Raise text input event for unhandled key down if there is some key symbol and no input modifier is present
+        if(!keyDownHandled && modifiers == AvnInputModifiersNone && keySymbol != NULL){
+            _parent->BaseEvents->RawTextInputEvent(timestamp, [keySymbol UTF8String]);
+        }
     }
     
-    [self keyboardEvent:event withType:KeyDown];
+    _lastKeyDownEvent = nullptr;
 }
 
 - (void)keyUp:(NSEvent *)event
@@ -545,6 +584,9 @@
 }
 
 - (void) doCommandBySelector:(SEL)selector{
+    if(_lastKeyDownEvent != nullptr){
+        [self keyboardEvent:_lastKeyDownEvent withType:KeyDown];
+    }
 }
 
 - (AvnInputModifiers)getModifiers:(NSEventModifierFlags)mod