attempt to disable nested df formatting

Author: Jolanrensen

core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/io/html.kt

@@ -179,17 +179,17 @@ internal fun AnyFrame.toHtmlData(
         val renderConfig = configuration.copy(decimalFormat = format)
         val contents = values.map { row ->
             val value = col[row]
-            val dfLikeContent = value.toDataFrameLikeOrNull()
-            if (dfLikeContent != null) {
-                val df = dfLikeContent.df()
-                if (df.isEmpty()) {
-                    HtmlContent("", null)
-                } else {
-                    val id = nextTableId()
-                    queue += RenderingQueueItem(df, id, dfLikeContent.configuration(defaultConfiguration))
-                    DataFrameReference(id, df.size)
-                }
-            } else {
+//            val dfLikeContent = value.toDataFrameLikeOrNull()
+//            if (dfLikeContent != null) {
+//                val df = dfLikeContent.df()
+//                if (df.isEmpty()) {
+//                    HtmlContent("", null)
+//                } else {
+//                    val id = nextTableId()
+//                    queue += RenderingQueueItem(df, id, dfLikeContent.configuration(defaultConfiguration))
+//                    DataFrameReference(id, df.size)
+//                }
+//            } else {
                 val html = formatter.format(
                     value = downsizeBufferedImageIfNeeded(value, renderConfig),
                     renderer = cellRenderer,
@@ -232,7 +232,7 @@ internal fun AnyFrame.toHtmlData(
                     ?.entries
                     ?.joinToString(";") { "${it.key}:${it.value}" }
                 HtmlContent(html, style)
-            }
+//            }
         }
         val nested = if (col is ColumnGroup<*>) {
             col.columns().map {

core/src/test/kotlin/org/jetbrains/kotlinx/dataframe/api/format.kt

@@ -2,6 +2,7 @@ package org.jetbrains.kotlinx.dataframe.api
 
 import io.kotest.matchers.shouldBe
 import io.kotest.matchers.shouldNotBe
+import org.jetbrains.kotlinx.dataframe.alsoDebug
 import org.jetbrains.kotlinx.dataframe.api.FormattingDsl.blue
 import org.jetbrains.kotlinx.dataframe.api.FormattingDsl.red
 import org.jetbrains.kotlinx.dataframe.api.FormattingDsl.rgb
@@ -312,4 +313,29 @@ class FormatTests : TestBase() {
         html.split("background-color:#00ff00").size - 1 shouldBe 5 // Only non-null weight values get formatted
         formatted::class.simpleName shouldBe "FormattedFrame"
     }
+
+    @Suppress("ktlint:standard:argument-list-wrapping")
+    @Test
+    fun `formatting a column shouldn't affect nested columns with the same name`() {
+        val df = dataFrameOf("firstName", "lastName", "age", "city", "weight", "isHappy")(
+            "Alice", "Cooper", 15, "London", 54, true,
+            "Bob", "Dylan", 45, "Dubai", 87, true,
+            "Charlie", "Daniels", 20, "Moscow", null, false,
+            "Charlie", "Chaplin", 40, "Milan", null, true,
+            "Bob", "Marley", 30, "Tokyo", 68, true,
+            "Alice", "Wolf", 20, null, 55, false,
+            "Charlie", "Byrd", 30, "Moscow", 90, true,
+        ).group("firstName", "lastName").into("name")
+            .groupBy("city").toDataFrame()
+            .add("cityCopy") { "city"<String>() }
+            .group("city").into("cityGroup")
+            .rename("cityCopy").into("city")
+
+        df.alsoDebug()
+
+        df.format().with { background(black) }.toStandaloneHtml().openInBrowser()
+
+        // affects city, cityGroup.city, and group[*].city
+        df.format("city").with { bold and italic and textColor(green) }.toStandaloneHtml().openInBrowser()
+    }
 }