Add option to enforce pasting plain text

There are use cases in which we want to ignore the base class [NSTextView readablePasteboardTypes] return values, which mostly, include RTF and formatted URL types
We want to ignore them in favor of plain text (NSPasteboardTypeString).

This change allows to opt into a custom list of supported paste types.

This is a follow-up to #1350

Author: christophpurrer

Libraries/Components/TextInput/TextInput.js

@@ -370,6 +370,26 @@ type MacOSProps = $ReadOnly<{|
    */
   clearTextOnSubmit?: ?boolean,
 
+  /**
+   * Fired when a supported element is pasted
+   *
+   * @platform macos
+   */
+  onPaste?: (event: PasteEvent) => void, // TODO(macOS GH#774)
+
+  /**
+   * Enables Paste support for certain types of pasted types
+   *
+   * Possible values for `pastedTypes` are:
+   *
+   * - `'fileUrl'`
+   * - `'image'`
+   * - `'string'`
+   *
+   * @platform macos
+   */
+  pastedTypes?: PastedTypesType,
+
   /**
    * Configures keys that can be used to submit editing for the TextInput. Defaults to 'Enter' key.
    * @platform macos
@@ -537,10 +557,13 @@ type AndroidProps = $ReadOnly<{|
   underlineColorAndroid?: ?ColorValue,
 |}>;
 
+export type PasteType = 'fileUrl' | 'image' | 'string'; // TODO(macOS GH#774)
+export type PastedTypesType = PasteType | $ReadOnlyArray<PasteType>; // TODO(macOS GH#774)
+
 export type Props = $ReadOnly<{|
   ...$Diff<ViewProps, $ReadOnly<{|style: ?ViewStyleProp|}>>,
   ...IOSProps,
-  ...MacOSProps,
+  ...MacOSProps, // TODO(macOS GH#774)
   ...AndroidProps,
 
   /**
@@ -786,13 +809,6 @@ export type Props = $ReadOnly<{|
    */
   onPressOut?: ?(event: PressEvent) => mixed,
 
-  /**
-   * Fired when a supported element is pasted
-   *
-   * @platform macos
-   */
-  onPaste?: (event: PasteEvent) => void, // TODO(macOS GH#774)
-
   /**
    * Callback that is called when the text input selection is changed.
    * This will be called with

Libraries/Text/TextInput/Multiline/RCTMultilineTextInputView.h

@@ -11,6 +11,9 @@ NS_ASSUME_NONNULL_BEGIN
 
 @interface RCTMultilineTextInputView : RCTBaseTextInputView
 
+#if TARGET_OS_OSX // [TODO(macOS GH#774)
+- (void)setReadablePasteBoardTypes:(NSArray<NSPasteboardType> *)readablePasteboardTypes;
+#endif // ]TODO(macOS GH#774)
 @end
 
 NS_ASSUME_NONNULL_END

Libraries/Text/TextInput/Multiline/RCTMultilineTextInputView.m

@@ -99,6 +99,9 @@ - (void)setEnableFocusRing:(BOOL)enableFocusRing {
   }
 }
 
+- (void)setReadablePasteBoardTypes:(NSArray<NSPasteboardType> *)readablePasteboardTypes {
+  [_backedTextInputView setReadablePasteBoardTypes:readablePasteboardTypes];
+}
 #endif // ]TODO(macOS GH#774)
 
 #pragma mark - UIScrollViewDelegate

Libraries/Text/TextInput/Multiline/RCTMultilineTextInputViewManager.m

@@ -7,6 +7,7 @@
 
 #import <React/RCTMultilineTextInputViewManager.h>
 #import <React/RCTMultilineTextInputView.h>
+#import <React/RCTUITextView.h> // TODO(macOS GH#774)
 
 @implementation RCTMultilineTextInputViewManager
 
@@ -22,4 +23,14 @@ - (RCTUIView *)view // TODO(macOS ISS#3536887)
 RCT_REMAP_NOT_OSX_VIEW_PROPERTY(dataDetectorTypes, backedTextInputView.dataDetectorTypes, UIDataDetectorTypes) // TODO(macOS GH#774)
 RCT_REMAP_OSX_VIEW_PROPERTY(dataDetectorTypes, backedTextInputView.enabledTextCheckingTypes, NSTextCheckingTypes) // TODO(macOS GH#774)
 
+#if TARGET_OS_OSX // [TODO(macOS GH#774)
+RCT_CUSTOM_VIEW_PROPERTY(pastedTypes, NSArray<NSPasteboardType>*, RCTUITextView)
+{
+  NSArray<NSPasteboardType> *types = json ? [RCTConvert NSPasteboardTypeArray:json] : nil;
+  if ([view respondsToSelector:@selector(setReadablePasteBoardTypes:)]) {
+    [view setReadablePasteBoardTypes: types];
+  }
+}
+#endif // ]TODO(macOS GH#774)
+
 @end

Libraries/Text/TextInput/Multiline/RCTUITextView.h

@@ -53,6 +53,7 @@ NS_ASSUME_NONNULL_BEGIN
 @property (nonatomic, assign) NSTextAlignment textAlignment;
 @property (nonatomic, copy, nullable) NSAttributedString *attributedText;
 - (NSSize)sizeThatFits:(NSSize)size;
+- (void)setReadablePasteBoardTypes:(NSArray<NSPasteboardType> *)readablePasteboardTypes;
 #endif // ]TODO(macOS GH#774)
 
 @end

Libraries/Text/TextInput/Multiline/RCTUITextView.m

@@ -21,6 +21,9 @@ @implementation RCTUITextView
 #endif // TODO(macOS GH#774)
   RCTBackedTextViewDelegateAdapter *_textInputDelegateAdapter;
   NSDictionary<NSAttributedStringKey, id> *_defaultTextAttributes;
+#if TARGET_OS_OSX // [TODO(macOS GH#774)
+  NSArray<NSPasteboardType> *_readablePasteboardTypes;
+#endif // TODO(macOS GH#774)
 }
 
 static UIFont *defaultPlaceholderFont()
@@ -177,6 +180,11 @@ - (void)setText:(NSString *)text
   self.string = text;
 }
 
+- (void)setReadablePasteBoardTypes:(NSArray<NSPasteboardType> *)readablePasteboardTypes
+{
+  _readablePasteboardTypes = readablePasteboardTypes;
+}
+
 - (void)setTypingAttributes:(__unused NSDictionary *)typingAttributes
 {
   // Prevent NSTextView from changing its own typing attributes out from under us.
@@ -344,9 +352,7 @@ - (BOOL)performDragOperation:(id<NSDraggingInfo>)draggingInfo
 }
 - (NSArray *)readablePasteboardTypes
 {
-  NSArray *types = [super readablePasteboardTypes];
-  // TODO: Optionally support files/images with a prop
-  return [types arrayByAddingObjectsFromArray:@[NSFilenamesPboardType, NSPasteboardTypePNG, NSPasteboardTypeTIFF]];
+  return _readablePasteboardTypes ? _readablePasteboardTypes : [super readablePasteboardTypes];
 }
 
 #endif // ]TODO(macOS GH#774)

Libraries/Text/TextInput/RCTBaseTextInputView.m

@@ -19,6 +19,7 @@
 #import <React/RCTInputAccessoryViewContent.h>
 #import <React/RCTTextAttributes.h>
 #import <React/RCTTextSelection.h>
+#import <React/RCTUITextView.h> // TODO(macOS GH#774)
 #import "../RCTTextUIKit.h" // TODO(macOS GH#774)
 
 @implementation RCTBaseTextInputView {
@@ -680,10 +681,11 @@ - (BOOL)textInputShouldHandleKeyEvent:(NSEvent *)event {
 - (BOOL)textInputShouldHandlePaste:(__unused id)sender
 {
   NSPasteboard *pasteboard = [NSPasteboard generalPasteboard];
-  NSPasteboardType fileType = [pasteboard availableTypeFromArray:@[NSFilenamesPboardType, NSPasteboardTypePNG, NSPasteboardTypeTIFF]];
-
+  NSPasteboardType fileType = [pasteboard availableTypeFromArray:@[NSPasteboardTypeFileURL, NSPasteboardTypePNG, NSPasteboardTypeTIFF]];
+  NSArray<NSPasteboardType>* pastedTypes = ((RCTUITextView*) self.backedTextInputView).readablePasteboardTypes;
+      
   // If there's a fileType that is of interest, notify JS. Also blocks notifying JS if it's a text paste
-  if (_onPaste && fileType != nil) {
+  if (_onPaste && fileType != nil && [pastedTypes containsObject:fileType]) {
     _onPaste([self dataTransferInfoFromPasteboard:pasteboard]);
   }
 

React/Base/RCTConvert.m

@@ -1233,11 +1233,12 @@ + (NSArray *)CGColorArray:(id)json
   }
 
   if ([type isEqualToString:@"fileUrl"]) {
-    return @[NSFilenamesPboardType];
+    return @[NSPasteboardTypeFileURL];
   } else if ([type isEqualToString:@"image"]) {
     return @[NSPasteboardTypePNG, NSPasteboardTypeTIFF];
+  } else if ([type isEqualToString:@"string"]) {
+    return @[NSPasteboardTypeString];
   }
-  
   return @[];
 }
 
@@ -1246,11 +1247,11 @@ + (NSArray *)CGColorArray:(id)json
   if ([json isKindOfClass:[NSString class]]) {
     return [RCTConvert NSPasteboardType:json];
   } else if ([json isKindOfClass:[NSArray class]]) {
-    NSMutableArray *mutablePastboardTypes = [NSMutableArray new];
+    NSMutableArray *mutablePasteboardTypes = [NSMutableArray new];
     for (NSString *type in json) {
-      [mutablePastboardTypes addObjectsFromArray:[RCTConvert NSPasteboardType:type]];
-      return mutablePastboardTypes.copy;
+      [mutablePasteboardTypes addObjectsFromArray:[RCTConvert NSPasteboardType:type]];
     }
+    return mutablePasteboardTypes.copy;
   }
   return @[];
 }

packages/rn-tester/js/examples/TextInput/TextInputExample.ios.js

@@ -427,7 +427,18 @@ function OnPaste(): React.Node {
           appendLog(JSON.stringify(e.nativeEvent.dataTransfer.types));
           setImageUri(e.nativeEvent.dataTransfer.files[0].uri);
         }}
-        placeholder="MULTI LINE with onPaste() for PNG and TIFF images"
+        pastedTypes={['string']}
+        placeholder="MULTI LINE with onPaste() text from clipboard"
+      />
+      <TextInput
+        multiline={true}
+        style={styles.multiline}
+        onPaste={(e: PasteEvent) => {
+          appendLog(JSON.stringify(e.nativeEvent.dataTransfer.types));
+          setImageUri(e.nativeEvent.dataTransfer.files[0].uri);
+        }}
+        pastedTypes={['fileUrl', 'image', 'string']}
+        placeholder="MULTI LINE with onPaste() for PNG/TIFF images from clipboard or fileUrl (via Finder) and text from clipboard"
       />
       <Text style={{height: 30}}>{log.join('\n')}</Text>
       <Image