fix(mobile): keep Android file icons on the line with wrapped filenames

apps/mobile/modules/t3-markdown-text/android/build.gradle

@@ -8,6 +8,10 @@ android {
   namespace 'expo.modules.t3markdowntext'
   compileSdk rootProject.ext.compileSdkVersion
 
+  testOptions {
+    unitTests.includeAndroidResources = true
+  }
+
   defaultConfig {
     minSdkVersion rootProject.ext.minSdkVersion
     targetSdkVersion rootProject.ext.targetSdkVersion
@@ -17,4 +21,12 @@ android {
 dependencies {
   implementation project(':expo-modules-core')
   implementation 'com.facebook.react:react-android'
+  testImplementation 'junit:junit:4.13.2'
+  testImplementation 'org.robolectric:robolectric:4.16.1'
+}
+
+tasks.withType(Test).configureEach {
+  javaLauncher = javaToolchains.launcherFor {
+    languageVersion = JavaLanguageVersion.of(21)
+  }
 }

apps/mobile/modules/t3-markdown-text/android/src/main/java/expo/modules/t3markdowntext/T3MarkdownTextSelectionModule.kt

@@ -28,19 +28,23 @@ private object MarkdownSpannableFactory : Spannable.Factory() {
     SpannableStringBuilder(source)
 }
 
-private fun copyTextWithoutInlineImages(
+internal fun copyTextWithoutInlineImages(
   text: CharSequence,
   start: Int,
   end: Int
 ): String {
   if (text !is Spanned) return text.subSequence(start, end).toString()
 
+  fun isInlineImage(index: Int): Boolean =
+    index >= 0 && text[index].toString() == OBJECT_REPLACEMENT_CHARACTER &&
+      text.getSpans(index, index + 1, ReplacementSpan::class.java).isNotEmpty()
+
   return buildString {
     for (index in start until end) {
-      val isInlineImage =
-        text[index].toString() == OBJECT_REPLACEMENT_CHARACTER &&
-          text.getSpans(index, index + 1, ReplacementSpan::class.java).isNotEmpty()
-      if (!isInlineImage) append(text[index])
+      // The renderer inserts one NBSP after each image to keep its label on the same line.
+      // Inspect the original text even when selection starts after the image.
+      val isIconSpacer = text[index] == '\u00A0' && isInlineImage(index - 1)
+      if (!isInlineImage(index) && !isIconSpacer) append(text[index])
     }
   }
 }

apps/mobile/modules/t3-markdown-text/android/src/test/java/expo/modules/t3markdowntext/MarkdownSelectionCopyTest.kt

@@ -0,0 +1,48 @@
+package expo.modules.t3markdowntext
+
+import android.graphics.drawable.ColorDrawable
+import android.text.SpannableString
+import android.text.Spanned
+import android.text.style.ImageSpan
+import org.junit.Assert.assertEquals
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [36], manifest = Config.NONE)
+class MarkdownSelectionCopyTest {
+  private fun withIcon(value: String): SpannableString = SpannableString(value).apply {
+    val index = value.indexOf('\uFFFC')
+    setSpan(ImageSpan(ColorDrawable()), index, index + 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
+  }
+
+  @Test
+  fun removesIconAndInjectedSpacer() {
+    val text = withIcon("\uFFFC\u00A0main.go:12 starts the server.")
+    assertEquals("main.go:12 starts the server.", copyTextWithoutInlineImages(text, 0, text.length))
+  }
+
+  @Test
+  fun removesSpacerWhenSelectionStartsAfterIcon() {
+    val text = withIcon("\uFFFC\u00A0main.go:12 starts the server.")
+    assertEquals("main.go:12", copyTextWithoutInlineImages(text, 1, 12))
+  }
+
+  @Test
+  fun preservesAuthoredWhitespaceAndLiteralObjectCharacters() {
+    val text = withIcon("before\u00A0 \uFFFC\u00A0\u00A0 main.go after\u00A0\uFFFC\u00A0")
+    assertEquals(
+      "before\u00A0 \u00A0 main.go after\u00A0\uFFFC\u00A0",
+      copyTextWithoutInlineImages(text, 0, text.length)
+    )
+  }
+
+  @Test
+  fun preservesTextWithoutImageSpans() {
+    val text = "\uFFFC\u00A0main.go"
+    assertEquals(text, copyTextWithoutInlineImages(text, 0, text.length))
+    assertEquals(text, copyTextWithoutInlineImages(SpannableString(text), 0, text.length))
+  }
+}

apps/mobile/modules/t3-markdown-text/src/NativeMarkdownSelectableText.tsx

@@ -222,6 +222,12 @@ export function NativeMarkdownSelectableText(props: {
       }
     }
 
+    // Android renders the icon as an inline Image before the text. A regular space
+    // lets the line break between them, stranding the icon on the previous line.
+    if (Platform.OS === "android" && (run.fileIcon || linkIcon)) {
+      text = `\u00A0${text}`;
+    }
+
     return { key: `${signature}:${occurrence}`, run, text, linkIcon };
   });
   // T3MarkdownText only rebuilds its attributed string during native layout. A