Add WithRawSpec

Author: alshan

gradle.properties

@@ -23,6 +23,10 @@ androidx.compose.bom=2025.08.00
 androidx.activity.compose=1.10.1
 
 #Versions
+
+# Beware of the versions in IDEA platform
+# The list of 3rd party libraries used in the IDEA platform: https://www.jetbrains.com/legal/third-party-software/?product=IIU
+
 # KMP is not compatible with AGP 8.3 yet.
 compose.version=1.8.2
 skiko.version=0.9.4.2

lets-plot-compose/src/commonMain/kotlin/org/jetbrains/letsPlot/skia/compose/WithRawSpec.kt

@@ -0,0 +1,11 @@
+/*
+ * Copyright (c) 2025 JetBrains s.r.o.
+ * Use of this source code is governed by the MIT license that can be found in the LICENSE file.
+ */
+
+package org.jetbrains.letsPlot.skia.compose
+
+
+interface WithRawSpec {
+    val rawSpec: MutableMap<String, Any>
+}

lets-plot-compose/src/desktopMain/kotlin/org/jetbrains/letsPlot/skia/compose/PlotPanel.kt

@@ -41,8 +41,14 @@ actual fun PlotPanel(
     // Update density on each recomposition to handle monitor DPI changes (e.g., drag between HIDPI/regular monitor)
     val density = LocalDensity.current.density.toDouble()
 
-    // Cache processed plot spec to avoid reprocessing the same figure on every recomposition.
-    val processedPlotSpec by remember(figure) { mutableStateOf(processRawSpecs(figure.toSpec(), frontendOnly = false)) }
+    // Cache plot processed spec to avoid reprocessing the same figure on every recomposition.
+    val processedPlotSpec by remember(figure) {
+        val rawSpec = when (figure) {
+            is WithRawSpec -> figure.rawSpec
+            else -> figure.toSpec()
+        }
+        mutableStateOf(processRawSpecs(rawSpec, frontendOnly = false))
+    }
     var panelSize by remember { mutableStateOf(DoubleVector.ZERO) }
     var dispatchComputationMessages by remember { mutableStateOf(true) }
     var specOverrideList by remember { mutableStateOf(emptyList<Map<String, Any>>()) }