Fix to trigger scans for only active editor text change.

Author: ashishrp-aws

plugins/toolkit/jetbrains-core/src/software/aws/toolkits/jetbrains/services/codewhisperer/codescan/CodeWhispererCodeScanManager.kt

@@ -387,7 +387,6 @@ class CodeWhispererCodeScanManager(val project: Project) {
      */
     fun addCodeScanUI(setSelected: Boolean = false) = runInEdt {
         reset()
-        EditorFactory.getInstance().eventMulticaster.addDocumentListener(documentListener, project)
         val problemsWindow = getProblemsWindow()
         if (!problemsWindow.contentManager.contents.contains(codeScanIssuesContent)) {
             problemsWindow.contentManager.addContent(codeScanIssuesContent)

plugins/toolkit/jetbrains-core/src/software/aws/toolkits/jetbrains/services/codewhisperer/codescan/listeners/CodeWhispererCodeScanDocumentListener.kt

@@ -6,8 +6,10 @@ package software.aws.toolkits.jetbrains.services.codewhisperer.codescan.listener
 import com.intellij.openapi.editor.event.DocumentEvent
 import com.intellij.openapi.editor.event.DocumentListener
 import com.intellij.openapi.fileEditor.FileDocumentManager
+import com.intellij.openapi.fileEditor.FileEditorManager
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.util.TextRange
+import com.intellij.openapi.vfs.isFile
 import software.aws.toolkits.jetbrains.services.codewhisperer.codescan.CodeWhispererCodeScanIssue
 import software.aws.toolkits.jetbrains.services.codewhisperer.codescan.CodeWhispererCodeScanManager
 import software.aws.toolkits.jetbrains.services.codewhisperer.explorer.CodeWhispererExplorerActionManager
@@ -22,6 +24,9 @@ internal class CodeWhispererCodeScanDocumentListener(val project: Project) : Doc
         val scanManager = CodeWhispererCodeScanManager.getInstance(project)
         val treeModel = scanManager.getScanTree().model
 
+        val fileEditorManager = FileEditorManager.getInstance(project)
+        val activeEditor = fileEditorManager.selectedEditor
+
         val editedTextRange = TextRange.create(event.offset, event.offset + event.oldLength)
         val nodes = scanManager.getOverlappingScanNodes(file, editedTextRange)
         nodes.forEach {
@@ -33,8 +38,8 @@ internal class CodeWhispererCodeScanDocumentListener(val project: Project) : Doc
             issue.rangeHighlighter?.textAttributes = null
         }
         scanManager.updateScanNodes(file)
-
-        if (CodeWhispererExplorerActionManager.getInstance().isAutoEnabledForCodeScan() &&
+        if (activeEditor != null && activeEditor.file == file &&
+            file.isFile && CodeWhispererExplorerActionManager.getInstance().isAutoEnabledForCodeScan() &&
             !CodeWhispererExplorerActionManager.getInstance().isMonthlyQuotaForCodeScansExceeded() &&
             !isUserBuilderId(project)
         ) {