添加自动插入

src/main/grammar/main.bnf

@@ -81,7 +81,7 @@ Import ::= ImportKeyword (ImportElement|ImportResource)';'{
     extends="me.zhouxi.slint.lang.psi.impl.SlintStubBasedPsiElementImpl<?>"
 }
 
-ImportElement ::= '{' ImportSpecifier (',' ImportSpecifier)* ','? '}' FromKeyword ModuleLocation{
+ImportElement ::= '{' ImportSpecifier (',' ImportSpecifier)* '}' FromKeyword ModuleLocation{
     pin=1
 }
 ImportResource ::= ModuleLocation

src/main/java/me/zhouxi/slint/lang/psi/impl/SlintStubBasedPsiElementImpl.kt

@@ -2,6 +2,7 @@ package me.zhouxi.slint.lang.psi.impl
 
 import com.intellij.extapi.psi.StubBasedPsiElementBase
 import com.intellij.lang.ASTNode
+import com.intellij.openapi.util.text.StringUtil
 import com.intellij.psi.PsiElement
 import com.intellij.psi.stubs.IStubElementType
 import com.intellij.psi.stubs.StubElement
@@ -14,5 +15,8 @@ abstract class SlintStubBasedPsiElementImpl<T : StubElement<out PsiElement>> :
 
     constructor(stub: T, nodeType: IStubElementType<*, *>) : super(stub, nodeType)
 
+    override fun toString(): String {
+        return StringUtil.trimEnd(this::class.java.simpleName, "Impl") + "(" + elementType + ")"
+    }
 
 }

src/main/kotlin/me/zhouxi/slint/completion/provider/ComponentProvider.kt

@@ -1,24 +1,28 @@
 package me.zhouxi.slint.completion.provider
 
-import com.intellij.codeInsight.completion.CompletionParameters
+import com.intellij.codeInsight.completion.*
-import com.intellij.codeInsight.completion.CompletionProvider
+import com.intellij.codeInsight.lookup.LookupElement
-import com.intellij.codeInsight.completion.CompletionResultSet
 import com.intellij.codeInsight.lookup.LookupElementBuilder
 import com.intellij.codeInsight.lookup.LookupElementDecorator
+import com.intellij.codeInsight.lookup.LookupElementDecorator.withInsertHandler
 import com.intellij.icons.AllIcons
 import com.intellij.openapi.vfs.VfsUtil
 import com.intellij.psi.PsiDocumentManager
+import com.intellij.psi.PsiFile
 import com.intellij.psi.PsiManager
+import com.intellij.psi.impl.source.tree.LeafPsiElement
 import com.intellij.psi.search.GlobalSearchScope.projectScope
 import com.intellij.psi.stubs.StubIndex
+import com.intellij.psi.util.PsiTreeUtil
 import com.intellij.psi.util.childrenOfType
-import com.intellij.refactoring.extractMethod.newImpl.ExtractMethodHelper.addSiblingAfter
+import com.intellij.psi.util.parentOfTypes
-import com.intellij.testFramework.utils.editor.commitToPsi
 import com.intellij.util.ProcessingContext
+import me.zhouxi.slint.lang.createComma
 import me.zhouxi.slint.lang.createImport
 import me.zhouxi.slint.lang.createImportSpecifier
 import me.zhouxi.slint.lang.psi.SlintComponent
 import me.zhouxi.slint.lang.psi.SlintImport
+import me.zhouxi.slint.lang.psi.extension.importNames
 import me.zhouxi.slint.lang.psi.stubs.index.StubIndexKeys
 
 object ComponentProvider : CompletionProvider<CompletionParameters>() {
@@ -44,31 +48,54 @@ object ComponentProvider : CompletionProvider<CompletionParameters>() {
         }
         val lookups = components.map {
             val targetFile = it.containingFile.originalFile
-            val currentFile = parameters.position.containingFile.originalFile
+            val currentFile = parameters.position.containingFile.originalFile.virtualFile
-            val path = VfsUtil.findRelativePath(currentFile.virtualFile, targetFile.virtualFile, '/')
+            val path = VfsUtil.findRelativePath(currentFile, targetFile.virtualFile, '/')
             val builder = LookupElementBuilder.create(it).withTypeText(path).withIcon(AllIcons.Nodes.Class)
-            LookupElementDecorator.withInsertHandler(builder) { context, item ->
+            withInsertHandler(builder, ComponentInsertHandler(targetFile, path))
-//                val caretOffset: Int = context.editor.caretModel.offset
-//                context.document.insertString(caretOffset, "{}")
-//                context.editor.caretModel.moveToOffset(caretOffset + 1)
-                val currentFile = PsiDocumentManager.getInstance(project).getPsiFile(context.document)!!
-                val element = item.psiElement as SlintComponent
-                val targetImport = currentFile.childrenOfType<SlintImport>().find { import ->
-                    val target = import.importElement?.moduleLocation?.reference?.resolve()
-                    PsiManager.getInstance(project).areElementsEquivalent(target, targetFile)
-                }
-                if (targetImport == null) {
-                    currentFile.addBefore(
-                        createImport(project, element.componentName!!.text, path!!),
-                        currentFile.firstChild
-                    )
-                } else {
-                    val importElement = targetImport.importElement!!
-                    val specifier = createImportSpecifier(project, element.componentName!!.text)
-                    importElement.addAfter(specifier,importElement.importSpecifierList.last())
-                }
-            }
         }
         result.addAllElements(lookups)
     }
+
+
+    class ComponentInsertHandler(
+        private val targetFile: PsiFile,
+        private val path: String?
+    ) : InsertHandler<LookupElement> {
+        override fun handleInsert(context: InsertionContext, item: LookupElement) {
+            val component = item.psiElement as SlintComponent
+            val targetImport = context.file.childrenOfType<SlintImport>().find { import ->
+                val target = import.importElement?.moduleLocation?.reference?.resolve()
+                PsiManager.getInstance(context.project).areElementsEquivalent(target, targetFile)
+            }
+            if (targetImport == null) {
+                //不存在对指定文件的Import，插入
+                val import = createImport(context.project, component.componentName!!.text, path!!)
+                context.file.addBefore(import, context.file.firstChild)
+                return
+            }
+            //如果导入的Name里面包含了这个ComponentName
+            if (targetImport.importNames().any { it.textMatches(component.componentName!!) }) {
+                return
+            }
+            //引入的文件存在，但是没有导入对应组件
+            val importElement = targetImport.importElement!!
+            val specifier = createImportSpecifier(context.project, component.componentName!!.text)
+            val last = importElement.importSpecifierList.lastOrNull()
+            //不存在前置节点
+            if (last == null) {
+                importElement.addAfter(specifier, importElement.childrenOfType<LeafPsiElement>()[0])
+                PsiDocumentManager.getInstance(context.project).commitDocument(context.document)
+                return
+            }
+            val element = PsiTreeUtil.nextVisibleLeaf(last)
+            if (!element!!.textMatches(",")) {
+                val comma = importElement.addAfter(createComma(context.project), last)
+                importElement.addAfter(specifier, comma)
+                PsiDocumentManager.getInstance(context.project).commitDocument(context.document)
+                return
+            }
+            PsiDocumentManager.getInstance(context.project).commitDocument(context.document)
+            importElement.addAfter(specifier, element)
+        }
+    }
 }

src/main/kotlin/me/zhouxi/slint/lang/SlintElementFactory.kt

@@ -4,6 +4,7 @@ import com.intellij.openapi.project.Project
 import com.intellij.psi.PsiElement
 import com.intellij.psi.PsiFileFactory
 import com.intellij.psi.util.PsiTreeUtil
+import com.intellij.psi.util.nextLeafs
 import me.zhouxi.slint.lang.psi.SlintComponent
 import me.zhouxi.slint.lang.psi.SlintFile
 import me.zhouxi.slint.lang.psi.SlintImportSpecifier
@@ -31,4 +32,10 @@ fun createImport(project: Project?, text: String, location: String): PsiElement
 fun createImportSpecifier(project: Project?, text: String): PsiElement {
     val element = createImport(project, text, "-")
     return PsiTreeUtil.findChildOfType(element, SlintImportSpecifier::class.java)!!
+}
+
+fun createComma(project: Project?): PsiElement {
+    val factory = PsiFileFactory.getInstance(project)
+    val file = factory.createFileFromText("dummy.slint", SlintLanguage.INSTANCE, ",")
+    return file.children[0].children[0]
 }

src/main/kotlin/me/zhouxi/slint/lang/psi/extension/SlintImportEx.kt

@@ -0,0 +1,20 @@
+package me.zhouxi.slint.lang.psi.extension
+
+import com.intellij.psi.PsiElement
+import me.zhouxi.slint.lang.psi.SlintImport
+import me.zhouxi.slint.lang.psi.SlintReferenceIdentifier
+
+
+fun SlintImport.importNames(): List<SlintReferenceIdentifier> {
+    return this.importElement?.importSpecifierList?.map { it.referenceIdentifier } ?: emptyList()
+}
+
+/**
+ * 导入的有效的名字,
+ * psiElement可能是identifier或者internalName
+ */
+fun SlintImport.availableNames(): List<PsiElement> {
+    return this.importElement?.importSpecifierList?.map {
+        it.importAlias?.internalName ?: it.referenceIdentifier
+    } ?: emptyList()
+}