fix(completion): improve completion contribution for DevInT language #101

The completion contribution for the DevInT language has been improved by using more specific element patterns and removing unnecessary imports and code. The completion is now triggered only when the caret is not at the beginning of the document and is not inside a code block, ensuring that the completion popup is shown only when it is relevant and useful to the user.

Author: phodal

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

@@ -2,12 +2,14 @@
 package cc.unitmesh.devti.language
 
 import cc.unitmesh.devti.language.psi.DevInFile
+import cc.unitmesh.devti.language.psi.DevInTypes
 import com.intellij.codeInsight.AutoPopupController
 import com.intellij.codeInsight.editorActions.TypedHandlerDelegate
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.project.Project
 import com.intellij.psi.PsiDocumentManager
 import com.intellij.psi.PsiFile
+import com.intellij.psi.util.elementType
 
 class DevInTypedHandler : TypedHandlerDelegate() {
     override fun checkAutoPopup(charTyped: Char, project: Project, editor: Editor, file: PsiFile): Result {
@@ -17,15 +19,15 @@ class DevInTypedHandler : TypedHandlerDelegate() {
 
         return when (charTyped) {
             '`' -> {
-//                val offset = editor.caretModel.primaryCaret.offset
-//                if (offset == 0) {
-//                    return Result.CONTINUE
-//                }
-//
-//                val element = file.findElementAt(offset - 1)
-//                if (element?.elementType == DevInTypes.CODE_CONTENT || element?.elementType == DevInTypes.CODE_BLOCK_END) {
-//                    return Result.CONTINUE
-//                }
+                val offset = editor.caretModel.primaryCaret.offset
+                if (offset == 0) {
+                    return Result.CONTINUE
+                }
+
+                val element = file.findElementAt(offset - 1)
+                if (element?.elementType == DevInTypes.CODE_CONTENT || element?.elementType == DevInTypes.CODE_BLOCK_END) {
+                    return Result.CONTINUE
+                }
 
                 PsiDocumentManager.getInstance(project).commitDocument(editor.document)
                 AutoPopupController.getInstance(project).autoPopupMemberLookup(editor, null)

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

@@ -6,14 +6,12 @@ import com.intellij.codeInsight.completion.CompletionContributor
 import com.intellij.codeInsight.completion.CompletionInitializationContext
 import com.intellij.codeInsight.completion.CompletionType
 import com.intellij.patterns.PlatformPatterns.psiElement
-import com.intellij.patterns.PsiElementPattern
-import com.intellij.psi.PsiElement
 
 class DevInCompletionContributor : CompletionContributor() {
     private val INPUT_DUMMY_IDENTIFIER = "DevInDummy"
 
     init {
-        extend(CompletionType.BASIC, declarationPattern(), CodeLanguageProvider())
+        extend(CompletionType.BASIC, psiElement(DevInTypes.LANGUAGE_ID), CodeLanguageProvider())
         extend(CompletionType.BASIC, psiElement(DevInTypes.VARIABLE_ID), CustomVariableProvider())
     }
 
@@ -22,8 +20,4 @@ class DevInCompletionContributor : CompletionContributor() {
             context.dummyIdentifier = INPUT_DUMMY_IDENTIFIER
         }
     }
-
-    fun declarationPattern(): PsiElementPattern.Capture<PsiElement> =
-        psiElement()
-            .and(psiElement(DevInTypes.LANGUAGE_ID))
 }