Merge branch 'feat/add_placeholderValue_to_page_source' of https://github.com/ikharebashviliGD/WebDriverAgent into feat/add_placeholderValue_to_page_source

# Conflicts:
#	WebDriverAgentLib/Categories/XCUIApplication+FBHelpers.m

Author: ikharebashviliGD

WebDriverAgentLib/Categories/FBXCElementSnapshotWrapper+Helpers.h

@@ -96,6 +96,11 @@ NS_ASSUME_NONNULL_BEGIN
  */
 - (nullable NSValue *)fb_hitPoint;
 
+/**
+ @return YES,  if the element type is one that supports placeholder text
+ */
+- (BOOL)fb_supportsPlaceholder;
+
 @end
 
 NS_ASSUME_NONNULL_END

WebDriverAgentLib/Categories/FBXCElementSnapshotWrapper+Helpers.m

@@ -162,6 +162,13 @@ - (NSValue *)fb_hitPoint
   return [NSValue valueWithCGPoint:result.hitPoint];
 }
 
+- (BOOL)fb_supportsPlaceholder {
+  XCUIElementType elementType = self.elementType;
+  return elementType == XCUIElementTypeTextField
+    || elementType == XCUIElementTypeSearchField
+    || elementType == XCUIElementTypeSecureTextField;
+}
+
 @end
 
 inline static BOOL isSnapshotTypeAmongstGivenTypes(id<FBXCElementSnapshot> snapshot, NSArray<NSNumber *> *types)