feat(android): improve TalkBack accessibility with virtual view hierarchy and host focus fix

android/src/main/java/com/swmansion/enriched/markdown/EnrichedMarkdownInternalText.kt

@@ -2,11 +2,11 @@ package com.swmansion.enriched.markdown
 
 import android.content.Context
 import android.graphics.Canvas
+import android.os.Build
 import android.text.Layout
 import android.util.AttributeSet
 import android.view.MotionEvent
-import androidx.appcompat.widget.AppCompatTextView
-import com.swmansion.enriched.markdown.accessibility.MarkdownAccessibilityHelper
+import com.swmansion.enriched.markdown.accessibility.AccessibleMarkdownTextView
 import com.swmansion.enriched.markdown.spoiler.SpoilerCapable
 import com.swmansion.enriched.markdown.spoiler.SpoilerOverlay
 import com.swmansion.enriched.markdown.spoiler.SpoilerOverlayDrawer
@@ -25,11 +25,9 @@ class EnrichedMarkdownInternalText
     context: Context,
     attrs: AttributeSet? = null,
     defStyleAttr: Int = 0,
-  ) : AppCompatTextView(context, attrs, defStyleAttr),
+  ) : AccessibleMarkdownTextView(context, attrs, defStyleAttr),
     BlockSegmentView,
     SpoilerCapable {
-    private val accessibilityHelper = MarkdownAccessibilityHelper(this)
-
     var lastElementMarginBottom: Float = 0f
 
     private val checkboxTouchHelper = CheckboxTouchHelper(this)
@@ -49,7 +47,7 @@ class EnrichedMarkdownInternalText
     private var onContextMenuItemPress: ((itemText: String, selectedText: String, selectionStart: Int, selectionEnd: Int) -> Unit)? = null
 
     init {
-      setupAsMarkdownTextView(accessibilityHelper)
+      setupAsMarkdownTextView()
       customSelectionActionModeCallback =
         createSelectionActionModeCallback(
           this,
@@ -109,7 +107,7 @@ class EnrichedMarkdownInternalText
     }
 
     fun setJustificationMode(needsJustify: Boolean) {
-      if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
+      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
         justificationMode =
           if (needsJustify) {
             Layout.JUSTIFICATION_MODE_INTER_WORD

android/src/main/java/com/swmansion/enriched/markdown/EnrichedMarkdownText.kt

@@ -10,9 +10,8 @@ import android.text.Layout
 import android.util.AttributeSet
 import android.util.Log
 import android.view.MotionEvent
-import androidx.appcompat.widget.AppCompatTextView
 import com.facebook.react.bridge.ReadableMap
-import com.swmansion.enriched.markdown.accessibility.MarkdownAccessibilityHelper
+import com.swmansion.enriched.markdown.accessibility.AccessibleMarkdownTextView
 import com.swmansion.enriched.markdown.parser.Md4cFlags
 import com.swmansion.enriched.markdown.parser.Parser
 import com.swmansion.enriched.markdown.renderer.Renderer
@@ -42,7 +41,7 @@ class EnrichedMarkdownText
     context: Context,
     attrs: AttributeSet? = null,
     defStyleAttr: Int = 0,
-  ) : AppCompatTextView(context, attrs, defStyleAttr),
+  ) : AccessibleMarkdownTextView(context, attrs, defStyleAttr),
     SpoilerCapable {
     private val parser = Parser.shared
     private val renderer = Renderer()
@@ -56,9 +55,6 @@ class EnrichedMarkdownText
 
     val layoutManager = EnrichedMarkdownTextLayoutManager(this)
 
-    // Accessibility helper for TalkBack support
-    private val accessibilityHelper = MarkdownAccessibilityHelper(this)
-
     private var contextMenuItemTexts: List<String> = emptyList()
     var onContextMenuItemPressCallback: ((itemText: String, selectedText: String, selectionStart: Int, selectionEnd: Int) -> Unit)? = null
 
@@ -86,7 +82,7 @@ class EnrichedMarkdownText
     var spoilerOverlay: SpoilerOverlay = SpoilerOverlay.PARTICLES
 
     init {
-      setupAsMarkdownTextView(accessibilityHelper)
+      setupAsMarkdownTextView()
       customSelectionActionModeCallback =
         createSelectionActionModeCallback(
           this,

android/src/main/java/com/swmansion/enriched/markdown/accessibility/AccessibleMarkdownTextView.kt

@@ -0,0 +1,33 @@
+package com.swmansion.enriched.markdown.accessibility
+
+import android.content.Context
+import android.graphics.Rect
+import android.util.AttributeSet
+import android.view.KeyEvent
+import android.view.MotionEvent
+import androidx.appcompat.widget.AppCompatTextView
+
+/** AppCompatTextView with built-in TalkBack support via MarkdownAccessibilityHelper. */
+abstract class AccessibleMarkdownTextView
+  @JvmOverloads
+  constructor(
+    context: Context,
+    attrs: AttributeSet? = null,
+    defStyleAttr: Int = 0,
+  ) : AppCompatTextView(context, attrs, defStyleAttr) {
+    val accessibilityHelper = MarkdownAccessibilityHelper(this)
+
+    override fun dispatchHoverEvent(event: MotionEvent): Boolean =
+      accessibilityHelper.dispatchHoverEvent(event) || super.dispatchHoverEvent(event)
+
+    override fun dispatchKeyEvent(event: KeyEvent): Boolean = accessibilityHelper.dispatchKeyEvent(event) || super.dispatchKeyEvent(event)
+
+    override fun onFocusChanged(
+      gainFocus: Boolean,
+      direction: Int,
+      previouslyFocusedRect: Rect?,
+    ) {
+      super.onFocusChanged(gainFocus, direction, previouslyFocusedRect)
+      accessibilityHelper.onFocusChanged(gainFocus, direction, previouslyFocusedRect)
+    }
+  }