Handle "Escape" key for TextInput (#1044)

* wip

* onKeyPress works

* Minor cleanup

* spaces not tabs

Author: Saadnajmi

Libraries/Text/TextInput/RCTBackedTextInputDelegate.h

@@ -36,6 +36,8 @@ NS_ASSUME_NONNULL_BEGIN
 - (BOOL)textInputShouldHandleDeleteBackward:(id<RCTBackedTextInputViewProtocol>)sender; // Return `YES` to have the deleteBackward event handled normally. Return `NO` to disallow it and handle it yourself. TODO(OSS Candidate ISS#2710739)
 #if TARGET_OS_OSX // [TODO(macOS GH#774)
 - (BOOL)textInputShouldHandleDeleteForward:(id<RCTBackedTextInputViewProtocol>)sender; // Return `YES` to have the deleteForward event handled normally. Return `NO` to disallow it and handle it yourself.
+
+- (void)textInputDidCancel;  // Handle `Escape` key press.
 #endif // ]TODO(macOS GH#774)
 
 @optional

Libraries/Text/TextInput/RCTBackedTextInputDelegateAdapter.m

@@ -187,17 +187,17 @@ - (BOOL)control:(NSControl *)control textShouldEndEditing:(NSText *)fieldEditor
 
 - (BOOL)control:(NSControl *)control textView:(NSTextView *)fieldEditor doCommandBySelector:(SEL)commandSelector
 {
+  id<RCTBackedTextInputDelegate> textInputDelegate = [_backedTextInputView textInputDelegate];
   BOOL commandHandled = NO;
   // enter/return
   if (commandSelector == @selector(insertNewline:) || commandSelector == @selector(insertNewlineIgnoringFieldEditor:)) {
     [self textFieldDidEndEditingOnExit];
-    if ([[_backedTextInputView textInputDelegate] textInputShouldReturn]) {
+    if ([textInputDelegate textInputShouldReturn]) {
       [[_backedTextInputView window] makeFirstResponder:nil];
     }
     commandHandled = YES;
     //backspace
   } else if (commandSelector == @selector(deleteBackward:)) {
-    id<RCTBackedTextInputDelegate> textInputDelegate = [_backedTextInputView textInputDelegate];
     if (textInputDelegate != nil && ![textInputDelegate textInputShouldHandleDeleteBackward:_backedTextInputView]) {
       commandHandled = YES;
     } else {
@@ -214,7 +214,13 @@ - (BOOL)control:(NSControl *)control textView:(NSTextView *)fieldEditor doComman
     //paste
   } else if (commandSelector == @selector(paste:)) {
     _backedTextInputView.textWasPasted = YES;
-  }
+    //escape
+  } else if (commandSelector == @selector(cancelOperation:)) {
+    [textInputDelegate textInputDidCancel];
+    [[_backedTextInputView window] makeFirstResponder:nil];
+    commandHandled = YES;
+}
+
   return commandHandled;
 }
 
@@ -411,6 +417,12 @@ - (BOOL)textView:(NSTextView *)textView doCommandBySelector:(SEL)commandSelector
     //deleteForward
   } else if (commandSelector == @selector(deleteForward:)) {
     commandHandled = textInputDelegate != nil && ![textInputDelegate textInputShouldHandleDeleteForward:_backedTextInputView];
+    //escape
+  } else if (commandSelector == @selector(cancelOperation:)) {
+    [textInputDelegate textInputDidCancel];
+    [_backedTextInputView.window makeFirstResponder:nil];
+    commandHandled = YES;
+    
   }
 
   return commandHandled;

Libraries/Text/TextInput/RCTBaseTextInputView.m

@@ -569,6 +569,15 @@ - (BOOL)textInputShouldHandleDeleteBackward:(__unused id)sender {
 - (BOOL)textInputShouldHandleDeleteForward:(__unused id)sender {
   return YES;
 }
+
+- (void)textInputDidCancel {
+  [_eventDispatcher sendTextEventWithType:RCTTextEventTypeKeyPress
+                                 reactTag:self.reactTag
+                                     text:nil
+                                      key:@"Escape"
+                               eventCount:_nativeEventCount];
+  [self textInputDidEndEditing];
+}
 #endif // ]TODO(macOS GH#774)
 
 - (void)updateLocalData