Allow overriding of Swing component painting behavior

jvm-package/jvm-publish-batik/build.gradle

@@ -95,8 +95,9 @@ task jarLetsPlotJvmBatikClasses(type: ShadowJar) {
  exclude 'svgMapper/**/*'
 
  // Fix for "META-INF/services files specify xalan" https://github.com/JetBrains/lets-plot/issues/576
- // Get rid of "services" altogether.
- exclude 'META-INF/services/**/*'
+ // Get rid only of harmful services.
+ exclude 'META-INF/services/org.apache.*'
+ exclude 'META-INF/services/javax.*'
 }
 
 task jarLetsPlotJvmBatikSources(type: ShadowJar) {

vis-svg-mapper-batik/src/jvmMain/kotlin/vis/swing/BatikGraphicsNodeRenderer.kt

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2023. JetBrains s.r.o.
+ * Use of this source code is governed by the MIT license that can be found in the LICENSE file.
+ */
+
+package jetbrains.datalore.vis.swing
+
+import org.apache.batik.gvt.GraphicsNode
+import java.awt.Graphics2D
+import java.util.*
+
+interface BatikGraphicsNodeRenderer {
+ val priority: Int
+ fun paint(node: GraphicsNode, g: Graphics2D)
+
+ object Default : BatikGraphicsNodeRenderer {
+ override val priority: Int
+ get() = 0
+
+ override fun paint(node: GraphicsNode, g: Graphics2D) {
+ node.paint(g)
+ }
+ }
+
+ companion object {
+ fun getInstance(): BatikGraphicsNodeRenderer {
+ val serviceClass = BatikGraphicsNodeRenderer::class.java
+ val loader = ServiceLoader.load(serviceClass, serviceClass.classLoader)
+ return loader.maxByOrNull { it.priority } ?: Default
+ }
+ }
+}

vis-svg-mapper-batik/src/jvmMain/kotlin/vis/swing/BatikMapperComponentHelper.kt

@@ -33,6 +33,7 @@ class BatikMapperComponentHelper private constructor(
  private val myMapper: SvgRootDocumentMapper
  private val myUserAgent: UserAgent
  private val myBridgeContext: BridgeContext
+ private val myRenderer: BatikGraphicsNodeRenderer
 
  val preferredSize: Dimension
  get() {
@@ -75,6 +76,8 @@ class BatikMapperComponentHelper private constructor(
  myGraphicsNode = builder.build(myBridgeContext, myMapper.target)
 
  myUserAgent.eventDispatcher.rootNode = myGraphicsNode
+
+ myRenderer = BatikGraphicsNodeRenderer.getInstance()
  }
 
  internal fun addSvgNodeContainerListener(l: SvgNodeContainerListener) {
@@ -99,7 +102,7 @@ class BatikMapperComponentHelper private constructor(
  }
 
  fun paint(g: Graphics2D) {
- myGraphicsNode.paint(g)
+ myRenderer.paint(myGraphicsNode, g)
  }
 
 // fun handleMouseEvent(e: MouseEvent) {