[iOS] Adds support for forward merging of blocks when pressing DELETE.

ios/RNTAztecView/RCTAztecView.swift

@@ -4,6 +4,7 @@ import UIKit
 
 class RCTAztecView: Aztec.TextView {
     @objc var onBackspace: RCTBubblingEventBlock? = nil
+    @objc var onDelete: RCTBubblingEventBlock? = nil
     @objc var onChange: RCTBubblingEventBlock? = nil
     @objc var onEnter: RCTBubblingEventBlock? = nil
     @objc var onFocus: RCTBubblingEventBlock? = nil
@@ -73,6 +74,23 @@ class RCTAztecView: Aztec.TextView {
         updatePlaceholderVisibility()
     }
 
+    /// The first rule of Fight Club is: You do not talk about Fight Club.
+    ///
+    @objc func _deleteForwardAndNotify(_ notify: Bool) {
+
+        guard !interceptForwardDelete() else {
+            return
+        }
+
+        let selector = #selector(RCTAztecView._deleteForwardAndNotify(_:))
+        let imp = class_getMethodImplementation(TextView.superclass(), selector)
+
+        typealias ClosureType = @convention(c) (AnyObject, Selector, Bool) -> Void
+        let superMethod: ClosureType = unsafeBitCast(imp, to: ClosureType.self)
+
+        superMethod(self, selector, notify)
+    }
+
     open override func deleteBackward() {
         guard !interceptBackspace() else {
             return
@@ -95,8 +113,19 @@ class RCTAztecView: Aztec.TextView {
         return true
     }
 
+    private func interceptForwardDelete() -> Bool {
+        guard selectedRange.location == attributedText.length && selectedRange.length == 0,
+            let onDelete = onDelete else {
+                return false
+        }
+
+        let caretData = packCaretDataForRN()
+        onDelete(caretData)
+        return true
+    }
+
     private func interceptBackspace() -> Bool {
-        guard selectedRange.location == 0,
+        guard selectedRange.location == 0 && selectedRange.length == 0,
             let onBackspace = onBackspace else {
                 return false
         }

ios/RNTAztecView/RCTAztecViewManager.m

@@ -5,6 +5,7 @@ @interface RCT_EXTERN_MODULE(RCTAztecViewManager, NSObject)
 RCT_REMAP_VIEW_PROPERTY(text, contents, NSDictionary)
 RCT_EXPORT_VIEW_PROPERTY(onContentSizeChange, RCTBubblingEventBlock)
 RCT_EXPORT_VIEW_PROPERTY(onBackspace, RCTBubblingEventBlock)
+RCT_EXPORT_VIEW_PROPERTY(onDelete, RCTBubblingEventBlock)
 RCT_EXPORT_VIEW_PROPERTY(onChange, RCTBubblingEventBlock)
 RCT_EXPORT_VIEW_PROPERTY(onEnter, RCTBubblingEventBlock)
 RCT_EXPORT_VIEW_PROPERTY(onFocus, RCTBubblingEventBlock)

src/AztecView.js

@@ -20,6 +20,7 @@ class AztecView extends React.Component {
     onContentSizeChange: PropTypes.func,
     onEnter: PropTypes.func,
     onBackspace: PropTypes.func,
+    onDelete: PropTypes.func,
     onScroll: PropTypes.func,
     onActiveFormatsChange: PropTypes.func,
     onSelectionChange: PropTypes.func,
@@ -79,6 +80,15 @@ class AztecView extends React.Component {
     onBackspace(event);
   }
 
+  _onDelete = (event) => {
+    if (!this.props.onDelete) {
+      return;
+    }
+
+    const { onDelete } = this.props;
+    onDelete(event);
+  }
+
   _onHTMLContentWithCursor = (event) => {
     if (!this.props.onHTMLContentWithCursor) {
       return;
@@ -149,6 +159,7 @@ class AztecView extends React.Component {
           onFocus = { () => {} } 
           onBlur = { this._onBlur }
           onBackspace = { this._onBackspace }
+          onDelete = { this._onDelete }
         />
       </TouchableWithoutFeedback>
     );