fix(completion): improve performance by using ReadAction and runBlock…

…ingCancellable #101

Previously, the completion provider was using a background task to load git commits, which could slow down the completion process. This commit optimizes the performance by using ReadAction to perform the commit loading operation in a non-blocking way, and runBlockingCancellable to ensure that the operation can be cancelled if necessary. This change should result in faster and more responsive completion suggestions.

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

@@ -5,9 +5,9 @@ import com.intellij.codeInsight.completion.CompletionProvider
 import com.intellij.codeInsight.completion.CompletionResultSet
 import com.intellij.codeInsight.lookup.LookupElementBuilder
 import com.intellij.icons.AllIcons
-import com.intellij.openapi.application.ApplicationManager
-import com.intellij.openapi.progress.ProgressIndicator
-import com.intellij.openapi.progress.Task
+import com.intellij.openapi.application.ReadAction
+import com.intellij.openapi.application.runReadAction
+import com.intellij.openapi.progress.runBlockingCancellable
 import com.intellij.openapi.project.Project
 import com.intellij.util.ProcessingContext
 import git4idea.GitCommit
@@ -16,6 +16,8 @@ import git4idea.repo.GitRepositoryManager
 
 
 class RevisionReferenceLanguageProvider : CompletionProvider<CompletionParameters>() {
+
+
     override fun addCompletions(
         parameters: CompletionParameters,
         context: ProcessingContext,
@@ -25,21 +27,17 @@ class RevisionReferenceLanguageProvider : CompletionProvider<CompletionParameter
         val repository = GitRepositoryManager.getInstance(project).repositories.firstOrNull() ?: return
         val branchName = repository.currentBranchName
 
-        try {
-            object : Task.Backgroundable(project, "loading git message", false) {
-                override fun run(indicator: ProgressIndicator) {
-                    val commits: List<GitCommit> = GitHistoryUtils.history(project, repository.root, branchName)
-                    commits.forEach {
-                        val element = LookupElementBuilder.create(it.id.toShortString())
-                            .withIcon(AllIcons.Vcs.Branch)
-                            .withTypeText(it.fullMessage, true)
-
-                        result.addElement(element)
-                    }
-                }
-            }.queue()
-        } catch (e: Exception) {
-            e.printStackTrace()
+        val commits: List<GitCommit> = ReadAction.compute<List<GitCommit>, Throwable> {
+            return@compute GitHistoryUtils.history(project, repository.root, branchName)
+        }
+
+        commits.forEach {
+            val element = LookupElementBuilder.create(it.id.toShortString())
+                .withIcon(AllIcons.Vcs.Branch)
+                .withPresentableText(it.fullMessage)
+                .withTypeText(it.id.toShortString(), true)
+
+            result.addElement(element)
         }
     }
 }

exts/devin-lang/src/test/testData/parser/CommandAndSymbol.devin

@@ -0,0 +1,5 @@
+/explain @symbol:cc.unitmesh.devti#RevProvider.constructor
+
+/refactor @symbol:cc.unitmesh.devti#RevProvider.completions
+
+/edit @file:Users/phodal/.gradle/caches/modules-2/files-2.1/com.jetbrains.intellij.idea/ideaIC/2023.3/eeff824a71d4b240b75e77296f74869ab1690c48/ideaIC-2023.3-sources.jar!/com/intellij/ide/presentation/VirtualFilePresentation.java #line:L1-L12