Switch from textColorForCaretSelection to returning the information i…

…n the stylingDictionary to remove more SPI.

https://bugs.webkit.org/show_bug.cgi?id=265706
rdar://119057506

Reviewed by Wenson Hsieh.

In our continued effort to move off of SPI, remove this call and instead return the information in a API path.

* Source/WebKit/UIProcess/ios/WKContentViewInteraction.mm:
(-[WKContentView textStylingAtPosition:inDirection:]):
(-[WKContentView textColorForCaretSelection]): Deleted.

Canonical link: https://commits.webkit.org/271507@main

Source/WebKit/UIProcess/ios/WKContentViewInteraction.mm

@@ -4255,13 +4255,16 @@ - (void)toggleStrikeThroughForWebView:(id)sender
 
 - (NSDictionary *)textStylingAtPosition:(UITextPosition *)position inDirection:(UITextStorageDirection)direction
 {
-    if (!position || !_page->editorState().isContentRichlyEditable)
-        return nil;
-
     NSMutableDictionary* result = [NSMutableDictionary dictionary];
+    [result setObject:[UIColor blackColor] forKey:NSForegroundColorAttributeName];
+    if (!position || !_page->editorState().isContentRichlyEditable)
+        return result;
 
     if (!_page->editorState().postLayoutData)
-        return nil;
+        return result;
+
+    [result setObject:[UIColor blackColor] forKey:NSForegroundColorAttributeName];
+
     auto typingAttributes = _page->editorState().postLayoutData->typingAttributes;
     CTFontSymbolicTraits symbolicTraits = 0;
     if (typingAttributes.contains(WebKit::TypingAttribute::Bold))
@@ -7545,11 +7548,6 @@ - (void)selectAll
     RELEASE_ASSERT_ASYNC_TEXT_INTERACTIONS_DISABLED();
 }
 
-- (UIColor *)textColorForCaretSelection
-{
-    return [UIColor blackColor];
-}
-
 - (UIFont *)fontForCaretSelection
 {
     UIFont *font = _autocorrectionData.font.get();