[Java. Terminal] Support completion for -classpath option for JavaShellCommandSpecsProvider

IDEA-359243

GitOrigin-RevId: 6e5c14bc68a81cff36588258efbca9862bbdc311

java/java-terminal/src/com/intellij/java/terminal/JavaShellCommandSpecsProvider.kt

@@ -54,7 +54,7 @@ class JavaShellCommandSpecsProvider : ShellCommandSpecsProvider {
       description(JavaTerminalBundle.message("java.command.terminal.classpath.option.description"))
       argument {
         displayName(CLASSPATH_ARGUMENT_NAME)
-        suggestions(ShellDataGenerators.fileSuggestionsGenerator())
+        suggestions(JavaShellCommandUtils.classpathSuggestionsGenerator())
       }
     }
     option("-showversion") {
@@ -116,7 +116,7 @@ class JavaShellCommandSpecsProvider : ShellCommandSpecsProvider {
       description(JavaTerminalBundle.message("java.command.terminal.classpath.option.description"))
       argument {
         displayName(CLASSPATH_ARGUMENT_NAME)
-        suggestions(ShellDataGenerators.fileSuggestionsGenerator())
+        suggestions(JavaShellCommandUtils.classpathSuggestionsGenerator())
       }
     }
     option("--help") {
@@ -161,7 +161,7 @@ private const val MAIN_CLASS_ARGUMENT_NAME: @NlsSafe String = "mainclass"
 private const val JAR_FILE_ARGUMENT_NAME: @NlsSafe String = "jar file"
 private const val CLASS_GC_GNI_ARGUMENT_NAME: @NlsSafe String = "class|gc|gni"
 private const val CLASS_GC_GNI_MODULE_ARGUMENT_NAME: @NlsSafe String = "$CLASS_GC_GNI_ARGUMENT_NAME|<module>"
-private val CLASSPATH_ARGUMENT_NAME: @NlsSafe String = "filepath[${ShellCommandUtils.getClassPathSeparator()}filepath]"
+private val CLASSPATH_ARGUMENT_NAME: @NlsSafe String = "filepath[${JavaShellCommandUtils.getClassPathSeparator()}filepath]"
 
 private val OPTION_UI_INFO_MAP = mapOf(
   "-Xms" to UIOptionInfo(separator = "", argumentName = SIZE_ARGUMENT_NAME),

java/java-terminal/src/com/intellij/java/terminal/JavaShellCommandUtils.kt

@@ -0,0 +1,40 @@
+// Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package com.intellij.java.terminal
+
+import com.intellij.openapi.util.SystemInfo
+import com.intellij.terminal.completion.spec.ShellCompletionSuggestion
+import com.intellij.terminal.completion.spec.ShellRuntimeContext
+import com.intellij.terminal.completion.spec.ShellRuntimeDataGenerator
+import org.jetbrains.plugins.terminal.block.completion.spec.ShellDataGenerators
+import org.jetbrains.plugins.terminal.block.completion.spec.ShellRuntimeDataGenerator
+
+internal object JavaShellCommandUtils {
+  internal fun getClassPathSeparator() = when {
+    SystemInfo.isWindows -> ";"
+    else -> ":"
+  }
+
+  internal fun classpathSuggestionsGenerator(): ShellRuntimeDataGenerator<List<ShellCompletionSuggestion>> {
+    val key = "classpath generator"
+    return ShellRuntimeDataGenerator(
+      debugName = key,
+      getCacheKey = {
+        val pathInfo = getPathInfo(it)
+        "$key:${pathInfo.lastSeparatorIndex}:${pathInfo.typedPrefix}"
+      }
+    ) { context ->
+      val pathInfo = getPathInfo(context)
+      ShellDataGenerators.getFileSuggestions(context, pathInfo.typedPrefix, false, if (pathInfo.lastSeparatorIndex == -1) 0 else pathInfo.lastSeparatorIndex + 1)
+    }
+  }
+
+  private fun getPathInfo(context: ShellRuntimeContext): PathInfo {
+    val separator = getClassPathSeparator()
+    val currentPrefix = context.typedPrefix
+    val index = currentPrefix.lastIndexOf(separator)
+    val newTypedPrefix = if (index == -1) currentPrefix else currentPrefix.substring(index + 1)
+    return PathInfo(newTypedPrefix, index)
+  }
+
+  private data class PathInfo(val typedPrefix: String, val lastSeparatorIndex: Int)
+}

java/java-terminal/src/com/intellij/java/terminal/ShellCommandUtils.kt

@@ -1,11 +0,0 @@
-// Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
-package com.intellij.java.terminal
-
-import com.intellij.openapi.util.SystemInfo
-
-internal object ShellCommandUtils {
-  internal fun getClassPathSeparator() = when {
-    SystemInfo.isWindows -> ";"
-    else -> ":"
-  }
-}