INT: use dark theme for cargo expand if IDE uses dark theme

Author: Undin

src/main/kotlin/org/rust/cargo/toolchain/tools/Cargo.kt

@@ -521,7 +521,7 @@ class Cargo(toolchain: RsToolchainBase, useWrapper: Boolean = false)
 
         fun checkNeedInstallCargoExpand(project: Project): Boolean {
             val crateName = "cargo-expand"
-            val minVersion = SemVer("v0.4.9", 0, 4, 9)
+            val minVersion = SemVer("v1.0.0", 1, 0, 0)
             return checkNeedInstallBinaryCrate(
                 project,
                 crateName,

src/main/kotlin/org/rust/ide/intentions/RunCargoExpandIntention.kt

@@ -6,9 +6,12 @@
 package org.rust.ide.intentions
 
 import com.intellij.codeInsight.intention.LowPriorityAction
+import com.intellij.ide.ui.LafManager
+import com.intellij.ide.ui.laf.UIThemeBasedLookAndFeelInfo
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.project.Project
 import com.intellij.psi.PsiElement
+import com.intellij.util.ui.UIUtil
 import org.rust.cargo.project.model.CargoProject
 import org.rust.cargo.project.workspace.CargoWorkspace
 import org.rust.cargo.toolchain.CargoCommandLine
@@ -40,9 +43,10 @@ class RunCargoExpandIntention : RsElementBaseIntentionAction<RunCargoExpandInten
         val (cargoProject, cargoTarget, crateRelativePath) = ctx
         if (checkNeedInstallCargoExpand(cargoProject.project)) return
 
+        val theme = if (isUnderDarkTheme()) "Dracula" else "GitHub"
         val additionalArguments = buildList<String> {
             add("--color=always")
-            add("--theme=GitHub")
+            add("--theme=$theme")
             add("--tests")
             if (crateRelativePath.isNotEmpty()) {
                 add(crateRelativePath.removePrefix(PATH_SEPARATOR))
@@ -57,6 +61,11 @@ class RunCargoExpandIntention : RsElementBaseIntentionAction<RunCargoExpandInten
         ).run(cargoProject, "Expand ${cargoTarget.normName}$crateRelativePath")
     }
 
+    private fun isUnderDarkTheme(): Boolean {
+        val lookAndFeel = LafManager.getInstance().currentLookAndFeel
+        return lookAndFeel is UIThemeBasedLookAndFeelInfo && lookAndFeel.theme.isDark || UIUtil.isUnderDarcula()
+    }
+
     companion object {
         private const val PATH_SEPARATOR: String = "::"
     }