[dotnet, inlays] support custom icon scale for block inlays

GitOrigin-RevId: 87f09546d5325e78e640c3627221fb8564cd4f51

platform/lang-impl/src/com/intellij/codeInsight/hints/presentation/PresentationFactory.kt

@@ -121,6 +121,12 @@ class PresentationFactory(private val editor: Editor) : InlayPresentationFactory
   @Contract(pure = true)
   override fun icon(icon: Icon): IconPresentation = IconPresentation(icon, editor.component)
 
+  @Contract(pure = true)
+  fun scaledIcon(icon: Icon, scaleFactor: Float): InlayPresentation
+  {
+    return ScaledIconWithCustomFactorPresentation(textMetricsStorage, false, icon, editor.component, scaleFactor)
+  }
+
   @Contract(pure = true)
   override fun smallScaledIcon(icon: Icon): InlayPresentation
   {

platform/lang-impl/src/com/intellij/codeInsight/hints/presentation/ScaledIconPresentation.kt

@@ -9,12 +9,13 @@ import java.awt.AlphaComposite
 import java.awt.Component
 import java.awt.Graphics2D
 import javax.swing.Icon
+import kotlin.math.ceil
 
 /**
  * Draws image. If you need to position image inside inlay, use [InsetPresentation]
  */
 @ApiStatus.Internal
-class ScaledIconPresentation(
+open class ScaledIconPresentation(
   private val metricsStorage: InlayTextMetricsStorage,
   val isSmall: Boolean,
   icon: Icon, private val component: Component) : BasePresentation() {
@@ -25,8 +26,7 @@ class ScaledIconPresentation(
   }
 
   private fun getMetrics() = metricsStorage.getFontMetrics(isSmall)
-
-  private fun getScaleFactor() = (getMetrics().fontHeight.toDouble() / icon.iconHeight)
+  protected open fun getScaleFactor() = (getMetrics().fontHeight.toDouble() / icon.iconHeight)
 
   override val width: Int
     get() = (icon.iconWidth * getScaleFactor()).toInt()
@@ -42,4 +42,18 @@ class ScaledIconPresentation(
   }
 
   override fun toString(): String = "<image>"
+}
+
+@ApiStatus.Internal
+class ScaledIconWithCustomFactorPresentation(
+  metricsStorage: InlayTextMetricsStorage,
+  isSmall: Boolean,
+  icon: Icon,
+  component: Component,
+  private val iconScaleFactor: Float = 1f) : ScaledIconPresentation(metricsStorage, isSmall, icon, component) {
+
+  override val height: Int
+    get() = ceil(super.height * iconScaleFactor).toInt()
+
+  override fun getScaleFactor(): Double = super.getScaleFactor() * iconScaleFactor
 }