fix(card-template-editor): update preview on card update

AnkiDroid/src/main/java/com/ichi2/anki/CardTemplateEditor.kt

@@ -232,21 +232,20 @@ open class CardTemplateEditor :
 
         topBinding.slidingTabs.doOnTabSelected { tab ->
             Timber.i("selected card index: %s", tab.position)
-            loadTemplatePreviewerFragmentIfFragmented()
+            loadTemplatePreviewerFragmentIfFragmented(tab.position)
         }
     }
 
     /**
      *  Loads or reloads [tempNoteType] in [R.id.fragment_container] if the view is fragmented. Do nothing otherwise.
      */
-    private fun loadTemplatePreviewerFragmentIfFragmented() {
+    private fun loadTemplatePreviewerFragmentIfFragmented(ord: CardOrdinal = mainBinding.cardTemplateEditorPager.currentItem) {
         if (!fragmented) {
             return
         }
         launchCatchingTask {
             val notetype = tempNoteType!!.notetype
             val notetypeFile = NotetypeFile(this@CardTemplateEditor, notetype)
-            val ord = mainBinding.cardTemplateEditorPager.currentItem
             val note = withCol { currentFragment?.getNote(this) ?: Note.fromNotetypeId(this@withCol, notetype.id) }
             val args =
                 TemplatePreviewerArguments(

AnkiDroid/src/test/java/com/ichi2/anki/CardTemplateEditorTest.kt

@@ -25,14 +25,16 @@ import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.ichi2.anki.CardTemplateEditor.CardTemplateFragment.CardTemplate
 import com.ichi2.anki.CollectionManager.withCol
 import com.ichi2.anki.dialogs.InsertFieldDialog
+import com.ichi2.anki.libanki.CardOrdinal
 import com.ichi2.anki.libanki.NotetypeJson
 import com.ichi2.anki.libanki.testutils.ext.addNote
 import com.ichi2.anki.model.SelectableDeck
 import com.ichi2.anki.notetype.ManageNoteTypesState.CardEditor
 import com.ichi2.anki.previewer.CardViewerActivity
+import com.ichi2.anki.previewer.TemplatePreviewerFragment
 import com.ichi2.anki.scheduling.selectTab
 import com.ichi2.testutils.assertFalse
-import com.ichi2.testutils.withTabletUi
+import com.ichi2.testutils.withSplitPaneUi
 import org.hamcrest.CoreMatchers.equalTo
 import org.hamcrest.MatcherAssert
 import org.hamcrest.MatcherAssert.assertThat
@@ -859,7 +861,7 @@ class CardTemplateEditorTest : RobolectricTest() {
 
     @Test
     fun `tab changes succeed with tablet UI - Issue 19589`() =
-        withTabletUi {
+        withSplitPaneUi {
             withCardTemplateEditor(col.notetypes.basicAndReversed) {
                 selectTab(1)
                 selectTab(0)
@@ -868,6 +870,16 @@ class CardTemplateEditorTest : RobolectricTest() {
             }
         }
 
+    @Test
+    fun `correct ord is previewed after tab change - tablet ui - issue 20097`() =
+        withSplitPaneUi {
+            withCardTemplateEditor(col.notetypes.basicAndReversed) {
+                selectTab(1)
+
+                assertThat(previewer.ord, equalTo(1))
+            }
+        }
+
     private fun addCardType(
         testEditor: CardTemplateEditor,
         shadowTestEditor: ShadowActivity,
@@ -962,3 +974,9 @@ fun RobolectricTest.withCardTemplateEditor(
 fun CardTemplateEditor.selectTab(index: Int) = topBinding.slidingTabs.selectTab(index)
 
 val CardTemplateEditor.selectedTabPosition: Int get() = topBinding.slidingTabs.selectedTabPosition
+
+val CardTemplateEditor.previewer: TemplatePreviewerFragment
+    get() = this.supportFragmentManager.findFragmentById(R.id.fragment_container) as TemplatePreviewerFragment
+
+val TemplatePreviewerFragment.ord: CardOrdinal
+    get() = this.viewModel.ordFlow.value

AnkiDroid/src/test/java/com/ichi2/anki/scheduling/SetDueDateDialogTest.kt

@@ -136,7 +136,15 @@ class SetDueDateDialogTest : RobolectricTest() {
     }
 }
 
-fun TabLayout.selectTab(index: Int) = selectTab(getTabAt(index))
+/**
+ * Selects a tab by index
+ *
+ * @throws IllegalArgumentException if index is invalid
+ */
+fun TabLayout.selectTab(index: Int) =
+    requireNotNull(getTabAt(index))
+        { "Tab $index not found" }
+        .also { tab -> selectTab(tab) }
 
 fun SetDueDateDialog.selectTab(index: Int) {
     val tabLayout = dialog!!.findViewById<TabLayout>(R.id.tab_layout)

AnkiDroid/src/test/java/com/ichi2/testutils/ScreenSize.kt

@@ -19,8 +19,8 @@ package com.ichi2.testutils
 import org.robolectric.RuntimeEnvironment
 import timber.log.Timber
 
-/** [block] runs with an `xlarge` Runtime qualifier */
-fun withTabletUi(block: () -> Unit) = withQualifier("xlarge", block)
+/** [block] runs with a runtime qualifier emulating a split-pane display */
+fun withSplitPaneUi(block: () -> Unit) = withQualifier("sw700dp", block)
 
 fun withQualifier(
     newQualifier: String,