feat(devins-lang): add documentation provider and refactor custom age…

…nt completion

#101

The commit adds a new documentation provider for the DevIn language, which improves the user experience by providing quick navigation information for PsiElements. Additionally, the commit refactors the CustomAgentCompletion class to use the new documentation provider and fixes an issue with the import statements. The changes also include modifications to the plugin.xml file to register the documentation provider and a refactoring of the loadAgentConfigs function to use the new documentation provider.

exts/devins-lang/src/main/kotlin/cc/unitmesh/devti/language/compiler/utils/ProjectFileUtil.kt

@@ -8,8 +8,5 @@ import com.intellij.openapi.vfs.VirtualFileManager
 fun Project.lookupFile(path: String): VirtualFile? {
     val projectPath = this.guessProjectDir()?.toNioPath()
     val realpath = projectPath?.resolve(path)
-
-    val virtualFile =
-        VirtualFileManager.getInstance().findFileByUrl("file://${realpath?.toAbsolutePath()}")
-    return virtualFile
+    return VirtualFileManager.getInstance().findFileByUrl("file://${realpath?.toAbsolutePath()}")
 }

exts/devins-lang/src/main/kotlin/cc/unitmesh/devti/language/completion/CustomAgentCompletion.kt

@@ -1,29 +1,20 @@
 package cc.unitmesh.devti.language.completion
 
-import cc.unitmesh.devti.agent.configurable.customAgentSetting
+import cc.unitmesh.devti.agent.configurable.loadAgentConfigs
 import cc.unitmesh.devti.agent.model.CustomAgentConfig
 import com.intellij.codeInsight.completion.CompletionParameters
 import com.intellij.codeInsight.completion.CompletionProvider
 import com.intellij.codeInsight.completion.CompletionResultSet
 import com.intellij.codeInsight.lookup.LookupElementBuilder
 import com.intellij.util.ProcessingContext
-import kotlinx.serialization.json.Json
-// DON'T CHANGE THIS IMPORT
-import kotlinx.serialization.decodeFromString
 
 class CustomAgentCompletion : CompletionProvider<CompletionParameters>() {
     override fun addCompletions(
         parameters: CompletionParameters,
         context: ProcessingContext,
         result: CompletionResultSet,
     ) {
-        val project = parameters.originalFile.project
-        val configs: List<CustomAgentConfig> = try {
-            val ragsJsonConfig = project.customAgentSetting.ragsJsonConfig
-            Json.decodeFromString(ragsJsonConfig)
-        } catch (e: Exception) {
-            emptyList()
-        }
+        val configs: List<CustomAgentConfig> = loadAgentConfigs(parameters.originalFile.project)
 
         configs.forEach {
             result.addElement(

exts/devins-lang/src/main/kotlin/cc/unitmesh/devti/language/completion/FileReferenceLanguageProvider.kt

@@ -56,7 +56,6 @@ class FileReferenceLanguageProvider : CompletionProvider<CompletionParameters>()
 
 fun canBeAdded(file: VirtualFile): Boolean {
     if (!file.isValid || file.isDirectory) return false
-
     if (file.fileType.isBinary || FileUtilRt.isTooLarge(file.length)) return false
 
     return true

exts/devins-lang/src/main/kotlin/cc/unitmesh/devti/language/documentation/DevInsDocumentationProvider.kt

@@ -0,0 +1,10 @@
+package cc.unitmesh.devti.language.documentation
+
+import com.intellij.lang.documentation.DocumentationProvider
+import com.intellij.psi.PsiElement
+
+class DevInsDocumentationProvider : DocumentationProvider {
+    override fun getQuickNavigateInfo(element: PsiElement?, originalElement: PsiElement?): String? {
+        return super.getQuickNavigateInfo(element, originalElement)
+    }
+}

exts/devins-lang/src/main/resources/cc.unitmesh.devti.language.xml

@@ -37,6 +37,9 @@
         <runLineMarkerContributor language="DevIn"
                                   implementationClass="cc.unitmesh.devti.language.run.DevInsRunLineMarkersProvider"/>
 
+        <lang.documentationProvider language="DevIn"
+                                    id="devinsDocumentationProvider"
+                                    implementationClass="cc.unitmesh.devti.language.documentation.DevInsDocumentationProvider"/>
     </extensions>
 
     <actions>
@@ -46,6 +49,6 @@
     </actions>
 
     <extensions defaultExtensionNs="cc.unitmesh">
-        <customAgentResponse implementation="cc.unitmesh.devti.language.provider.DevInsCustomAgentResponse" />
+        <customAgentResponse implementation="cc.unitmesh.devti.language.provider.DevInsCustomAgentResponse"/>
     </extensions>
 </idea-plugin>

src/main/kotlin/cc/unitmesh/devti/agent/configurable/CoUnitSettingService.kt

@@ -1,11 +1,25 @@
 package cc.unitmesh.devti.agent.configurable
 
+import cc.unitmesh.devti.agent.model.CustomAgentConfig
 import com.intellij.openapi.components.*
 import com.intellij.openapi.project.Project
+import kotlinx.serialization.json.Json
+// DON'T CHANGE THIS IMPORT
+import kotlinx.serialization.decodeFromString
 
 val Project.customAgentSetting: CoUnitProjectSettingsService
     get() = service<CoUnitProjectSettingsService>()
 
+fun loadAgentConfigs(project: Project): List<CustomAgentConfig> {
+    val configs: List<CustomAgentConfig> = try {
+        val ragsJsonConfig = project.customAgentSetting.ragsJsonConfig
+        Json.decodeFromString(ragsJsonConfig)
+    } catch (e: Exception) {
+        emptyList()
+    }
+    return configs
+}
+
 @Service(Service.Level.PROJECT)
 @State(name = "CoUnitProjectSettings", storages = [Storage(StoragePathMacros.WORKSPACE_FILE)])
 class CoUnitProjectSettingsService(