feat(completion): add support for automatic colon insertion and caret positioning after builtin commands completion. #101

This commit enhances the builtin command completion feature by automatically inserting a colon and positioning the caret after the command, improving the user experience and reducing the number of keystrokes required for command completion.

Author: phodal

exts/devin-lang/src/main/kotlin/cc/unitmesh/devti/language/completion/BuiltinCommandProvider.kt

@@ -1,15 +1,16 @@
 package cc.unitmesh.devti.language.completion
 
 import cc.unitmesh.devti.language.DevInIcons
+import com.intellij.codeInsight.AutoPopupController
 import com.intellij.codeInsight.completion.*
 import com.intellij.codeInsight.lookup.LookupElementBuilder
 import com.intellij.icons.AllIcons
 import com.intellij.util.ProcessingContext
 import javax.swing.Icon
 
-enum class BuiltinCommand(val agentName: String, val description: String, val icon: Icon) {
-    FILE("file", "Read the content of a file", AllIcons.Actions.AddFile),
-    REV("rev", "Read git change by file", AllIcons.Vcs.History),
+enum class BuiltinCommand(val agentName: String, val description: String, val icon: Icon, val hasCompletion: Boolean = false) {
+    FILE("file", "Read the content of a file", AllIcons.Actions.AddFile, true),
+    REV("rev", "Read git change by file", AllIcons.Vcs.History, true),
     SYMBOL("symbol", "Read content by Java/Kotlin canonicalName", AllIcons.Actions.GroupBy),
     WRITE("write", "Write content to a file, /write:/path/to/file:L1-L2", AllIcons.Actions.Edit),
     ;
@@ -36,6 +37,15 @@ class BuiltinCommandProvider : CompletionProvider<CompletionParameters>() {
                 LookupElementBuilder.create(it.agentName)
                     .withIcon(it.icon)
                     .withTypeText(it.description, true)
+                    .withInsertHandler { context, _ ->
+                        if (!it.hasCompletion) return@withInsertHandler
+
+                        context.document.insertString(context.tailOffset, ":")
+                        context.editor.caretModel.moveCaretRelatively(1, 0, false, false, false)
+
+                        val editor = context.editor
+                        AutoPopupController.getInstance(editor.project!!).scheduleAutoPopup(editor)
+                    }
             )
         }
     }