feat: GutenbergKit supports mentions and cross-posts (#22109)

* feat: Display suggestions UI for GutenbergKit autocompletion

* feat: Display cross-post suggestions based on site capabilities

* build: Update GutenbergKit version

* build: Update GutenbergKit version

* build: Update GutenbergKit version

* docs: Shorten inline comment

* build: Update GutenbergKit version

* build: Update GutenbergKit version

Author: dcalhoun

WordPress/src/main/java/org/wordpress/android/ui/posts/EditPostActivity.kt

@@ -2762,6 +2762,10 @@ class EditPostActivity : BaseAppCompatActivity(), EditorFragmentActivity, Editor
         if (editorFragment is GutenbergEditorFragment) {
             (editorFragment as GutenbergEditorFragment).updateCapabilities(gutenbergPropsBuilder)
         }
+        if (editorFragment is GutenbergKitEditorFragment) {
+            val enableXPosts = siteModel.isUsingWpComRestApi && (isXPostsCapable == null || isXPostsCapable == true)
+            (editorFragment as GutenbergKitEditorFragment).setXPostsEnabled(enableXPosts)
+        }
     }
 
     private val gutenbergPropsBuilder: GutenbergPropsBuilder

WordPress/src/main/java/org/wordpress/android/ui/posts/editor/GutenbergKitEditorFragment.kt

@@ -75,6 +75,7 @@ class GutenbergKitEditorFragment : EditorFragmentAbstract(), EditorMediaUploadLi
     private var isEditorStarted = false
     private var isEditorDidMount = false
     private var rootView: View? = null
+    private var isXPostsEnabled: Boolean = false
 
     // Access settings through ViewModel
     private val settings: GutenbergKitSettings?
@@ -139,6 +140,31 @@ class GutenbergKitEditorFragment : EditorFragmentAbstract(), EditorMediaUploadLi
             featuredImageChangeListener?.let(gutenbergView::setFeaturedImageChangeListener)
             openMediaLibraryListener?.let(gutenbergView::setOpenMediaLibraryListener)
             onLogJsExceptionListener?.let(gutenbergView::setLogJsExceptionListener)
+
+            // Set up autocomplete listener for user mentions and cross-post suggestions
+            gutenbergView.setAutocompleterTriggeredListener(object : GutenbergView.AutocompleterTriggeredListener {
+                override fun onAutocompleterTriggered(type: String) {
+                    when (type) {
+                        "at-symbol" -> mEditorFragmentListener.showUserSuggestions { result ->
+                            result?.let {
+                                // Appended space completes the autocomplete session
+                                gutenbergView.appendTextAtCursor("$it ")
+                            }
+                        }
+                        "plus-symbol" -> {
+                            if (isXPostsEnabled) {
+                                mEditorFragmentListener.showXpostSuggestions { result ->
+                                    result?.let {
+                                        // Appended space completes the autocomplete session
+                                        gutenbergView.appendTextAtCursor("$it ")
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            })
+
             gutenbergView.setEditorDidBecomeAvailable {
                 isEditorDidMount = true
                 mEditorFragmentListener.onEditorFragmentContentReady(ArrayList<Any?>(), false)
@@ -523,6 +549,10 @@ class GutenbergKitEditorFragment : EditorFragmentAbstract(), EditorMediaUploadLi
         gutenbergView?.start(config)
     }
 
+    fun setXPostsEnabled(enabled: Boolean) {
+        isXPostsEnabled = enabled
+    }
+
     private fun buildEditorConfiguration(editorSettings: String): EditorConfiguration {
         val kitSettings = settings!!
 

gradle/libs.versions.toml

@@ -73,7 +73,7 @@ google-play-services-auth = '20.4.1'
 google-services = '4.4.3'
 gravatar = '2.5.0'
 greenrobot-eventbus = '3.3.1'
-gutenberg-kit = 'v0.7.0'
+gutenberg-kit = 'v0.8.0-alpha.0'
 gutenberg-mobile = 'v1.121.0'
 indexos-media-for-mobile = '43a9026f0973a2f0a74fa813132f6a16f7499c3a'
 jackson-databind = '2.12.7.1'