Limit Android 15 bounds-based text width to RTL text (#59504)

Summary:
Pull Request resolved: #59504

On Android 15+, every exactly sized `StaticLayout` enables `setUseBoundsForWidth` and `setShiftDrawingOffsetForStartOverhang` to keep RTL line-start ink from clipping. The exact width usually comes from an earlier `AT_MOST` measurement, which is advance-based. When a font's glyph bounds extend past their advances (seen with some OEM system fonts), a single-line LTR `Text` with `numberOfLines={1}` no longer fits the width it was measured at, and gets ellipsized well inside its own frame.

Only enable the bounds-based width and start-overhang shift when the text contains RTL characters, which is the case the start-overhang handling was added for. LTR-only text goes back to advance-based layout in both passes, so the layout matches the measurement.

Changelog:
[Android][Fixed] - Fix single-line LTR `Text` being ellipsized inside its measured width on Android 15+

Reviewed By: christophpurrer

Differential Revision: D126965612

fbshipit-source-id: 4288a23828c252f999668b8cc0b3d427cdf8dcec

Author: generatedunixname1608173377072046

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/text/TextLayoutManager.kt

@@ -902,7 +902,12 @@ internal object TextLayoutManager {
             }
           }
         }
-    val enableStartOverhang = widthYogaMeasureMode == YogaMeasureMode.EXACTLY
+    // Bounds-based width is limited to text with RTL characters. An EXACTLY width usually comes
+    // from an earlier advance-based AT_MOST measurement, and LTR glyph bounds that are wider than
+    // their advances (some OEM fonts) would make a single line overflow that width and ellipsize.
+    val enableStartOverhang =
+        widthYogaMeasureMode == YogaMeasureMode.EXACTLY &&
+            TextDirectionHeuristics.ANYRTL_LTR.isRtl(text, 0, text.length)
     val layout =
         buildLayout(
             text,

packages/react-native/ReactAndroid/src/test/java/com/facebook/react/views/text/TextLayoutManagerStartOverhangTest.kt

@@ -46,6 +46,29 @@ class TextLayoutManagerStartOverhangTest {
     assertThat(getBooleanLayoutProperty(layout, "getShiftDrawingOffsetForStartOverhang")).isFalse()
   }
 
+  @Test
+  @Config(sdk = [35])
+  fun `EXACTLY mode keeps advance based width measurement for LTR text`() {
+    val layout =
+        createLayout(
+            YogaMeasureMode.EXACTLY,
+            text = SpannableString("Just listed"),
+            ellipsizeMode = TextUtils.TruncateAt.END,
+            maxNumberOfLines = 1,
+        )
+
+    assertThat(getBooleanLayoutProperty(layout, "getUseBoundsForWidth")).isFalse()
+    assertThat(getBooleanLayoutProperty(layout, "getShiftDrawingOffsetForStartOverhang")).isFalse()
+  }
+
+  @Test
+  @Config(sdk = [35])
+  fun `EXACTLY mode enables start overhang support for mixed LTR and RTL text`() {
+    val layout = createLayout(YogaMeasureMode.EXACTLY, text = SpannableString("Hello שלום"))
+
+    assertThat(getBooleanLayoutProperty(layout, "getUseBoundsForWidth")).isTrue()
+  }
+
   @Test
   @Config(sdk = [35])
   fun `RTL right overhang is rounded up to reserve whole pixels`() {