front end - What is the complete list of valid FrontEnd Packet types?

In response to my question How can I get the unchanged Box form of an arbitrary expression? John Fultz answered with a method using the hilariously named FrontEnd`UndocumentedTestFEParserPacket.

What is the complete list of such Packets?

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Related:

Answer

Once again thanks to John Fultz we know a command that returns the complete list of these packets:

MathLink`CallFrontEnd[FrontEnd`NeedCurrentFrontEndSymbolsPacket[]][[1, 1, 4]]

Results from Mathematica 7:

""
"Null"
"CompoundExpression"
"List"
"Execute"
"FrontEndExecute"

"KernelExecute"
"OpenParallelLinksPacket"
"KernelStartupCompleted"
"ReassignInputNamePacket"
"InputNamePacket"
"OutputNamePacket"
"ReturnTextPacket"
"ReturnInputFormPacket"
"ReturnPacket"
"TextPacket"

"DisplayPacket"
"DisplayEndPacket"
"SyntaxPacket"
"InputPacket"
"InputStringPacket"
"ExperimentalInputMouseCoordinatesPacket"
"MenuPacket"
"MessagePacket"
"ConsoleMessagePacket"
"PrintTemporaryPacket"

"SuspendPacket"
"ResumePacket"
"BeginDialogPacket"
"EndDialogPacket"
"EvaluatorStart"
"EvaluatorQuit"
"EvaluatorInterrupt"
"EvaluatorAbort"
"EvaluatorHalt"
"EnterSubsession"

"ExitSubsession"
"Forward"
"ForwardEvaluate"
"ForwardedData"
"CompletionsListPacket"
"SpellingSuggestionsPacket"
"NotebookResetGeneratedCells"
"DontNotebookResetGeneratedCells"
"BeginFrontEndInteractionPacket"
"EndFrontEndInteractionPacket"

"DisplaySetSizePacket"
"DisplayFlushImagePacket"
"FlushPrintOutputPacket"
"FrontEndToken"
"SetFileLoadingContext"
"Version"
"VersionNumber"
"DefaultFormatTypeForStyle"
"Notebooks"
"SelectedNotebook"

"SetSelectedNotebook"
"InputNotebook"
"EvaluationNotebook"
"SetEvaluationNotebook"
"ButtonNotebook"
"ClipboardNotebook"
"MessagesNotebook"
"HelpBrowserNotebook"
"DefaultHelpViewerNotebook"
"DebuggerContinue"

"DebuggerContinueToSelection"
"DebuggerSelect"
"DebuggerSetStackList"
"DebuggerSetExpressionColoring"
"DebuggerGetSelectionInformation"
"DebuggerAddBreakpoint"
"DebuggerRemoveBreakpoint"
"DebuggerEnableBreakpoint"
"DebuggerDisableBreakpoint"
"DebuggerSetAutoContinueBreakpoint"

"DebuggerSetNoAutoContinueBreakpoint"
"DebuggerSetBreakOnAssignmentWatchpoint"
"DebuggerSetNoBreakOnAssignmentWatchpoint"
"DebuggerSetBreakOnEvaluationWatchpoint"
"DebuggerSetNoBreakOnEvaluationWatchpoint"
"DebuggerSetBreakOnFunctionWatchpoint"
"DebuggerSetNoBreakOnFunctionWatchpoint"
"DebuggerToolsNotebook"
"DebuggerStackNotebook"
"DebuggerBreakpointsNotebook"

"EvaluationCell"
"ButtonCell"
"NotebookCreate"
"NotebookCreateReturnObject"
"NotebookOpen"
"NotebookOpenReturnObject"
"NotebookLocate"
"NotebookLocateReturnResult"
"SystemOpen"
"HelpBrowserLookup"

"HelpBrowserLookupReturnResult"
"HelpBrowserGetListBoxList"
"HelpBrowserSetListBoxItem"
"NotebookClose"
"NotebookSave"
"NotebookSaveAs"
"NotebookConvert"
"NotebookPrint"
"NotebookImage"
"ToExpression"

"NotebookPut"
"NotebookPutReturnObject"
"NotebookGet"
"NotebookRead"
"NotebookWrite"
"NotebookApply"
"CellPrint"
"NotebookDelete"
"NotebookFind"
"NotebookFindReturnObject"

"SelectionMove"
"SelectionCreateCell"
"SelectionCellCreateCell"
"SelectionDuplicateCell"
"SelectionEvaluate"
"SelectionEvaluateCreateCell"
"SelectionEvaluateApply"
"FileBrowse"
"DirectoryBrowse"
"ChooseColor"

"RecordSound"
"Options"
"FullOptions"
"AbsoluteOptions"
"LocalOptions"
"LocalAbsoluteOptions"
"SetOptions"
"RemoveOptions"
"SetLocalOptions"
"SaveConversionOptions"

"RestoreConversionOptions"
"SelectionSetStyle"
"CallPacket"
"Value"
"SetValue"
"Select2DTool"
"Select3DTool"
"Argument"
"SetArgument"
"ChildObject"

"ObjectChildren"
"ObjectChildCount"
"NextSiblingObject"
"PreviousSiblingObject"
"ParentObject"
"SelectObject"
"SelectedObject"
"OutputCellObject"
"ObjectGet"
"ObjectPut"

"NotebookSuspendScreenUpdates"
"NotebookResumeScreenUpdates"
"NotebookUpdateScreen"
"SelectNamedObject"
"ReadNamedObject"
"ReplaceNamedObject"
"SelectionApply"
"SelectionCellsMap"
"SelectionCellContentsMap"
"EvaluatePacket"

"SetKernelSymbolContexts"
"UpdateKernelSymbolContexts"
"SetFunctionInformation"
"UpdateDynamicObjects"
"UpdateDynamicObjectsSynchronous"
"AddVariableDefiningFunctions"
"AddUsedToGenerateSideEffectGraphicsFunctions"
"AddFunctionTemplateInformationToFunctions"
"AddOptionInformationToFunctions"
"ControllerBindingsInOutput"

"ReturnDynamicOutput"
"NotebookInformation"
"CellInformation"
"ToFileName"
"SetPersistentFrontEnd"
"GetMenusPacket"
"ResetMenusPacket"
"AddFileBrowserFilterPacket"
"OpenFunctionInspectorPacket"
"GetErrorsInSelectionPacket"

"ErrorIconIsDisplayedPacket"
"UndocumentedTestFEParserPacket"
"UndocumentedGetSelectionPacket"
"UndocumentedBoxInformationPacket"
"UndocumentedBoxStatisticsPacket"
"UndocumentedHangFrontEndPacket"
"UndocumentedCrashFrontEndPacket"
"UndocumentedGetNGraphicsImagePacket"
"UndocumentedGetBoxTypesPacket"
"UndocumentedWhyTheBeepText"

"ReparseBoxStructurePacket"
"AddBoxIDs"
"SetBoxIDs"
"GetBoxIDs"
"RemoveBoxIDs"
"BoxReferenceExists"
"BoxReferenceFind"
"BoxReferenceRead"
"BoxReferenceReplace"
"BoxReferenceSetOptions"

"BoxReferenceGetOptions"
"UndocumentedProtoTypeBuild"
"ImportToNotebook"
"ConvertToPostScriptPacket"
"ConvertToPostScriptPacket2"
"VerboseConvertToPostScriptPacket"
"ConvertToBitmapPacket"
"VerboseConvertToBitmapPacket"
"ExportPacket"
"GetLinebreakInformationPacket"

"GetPageBreakInformationPacket"
"GetSelectionBoundingBoxes"
"GetBoundingBoxSizePacket"
"NotebookSetupLayoutInformationPacket"
"NotebookGetLayoutInformationPacket"
"NotebookGetFontParametersPacket"
"NotebookGetMisspellingsPacket"
"InputToBoxFormPacket"
"ExpressionPacket"
"ReturnExpressionPacket"

"CreatePalettePacket"
"SetNotebookStatusLine"
"SetBoxFormNamesPacket"
"NeedCurrentFrontEndPackagePacket"
"NeedCurrentFrontEndSymbolsPacket"
"SpeakTextPacket"
"SetSpeechParametersPacket"
"CurrentlySpeakingPacket"
"BeepPacket"
"PlaySoundPacket"

"PlaySoundFilePacket"
"TimeConstrained"
"MemoryConstrained"
"GetFrontEndOptionsDataPacket"
"TemplateTooltipPacket"
"GetCellTagsPacket"
"AddEvaluatorNames"
"AddMenuCommands"
"AddDefaultFontProperties"
"NotebookReleaseHold"

"NotebookDynamicToLiteral"
"NotebookCreateDynamicCaches"
"SelectionAddCellTags"
"SelectionRemoveCellTags"
"SelectionAnimate"
"RegisterConverter"
"ParseFileToLinkPacket"
"DebugTooltipPacket"
"CursorTooltipPacket"
"Install"

"SetJavaParameter"
"FindFileOnPath"
"GetFunctionCategories"
"CopyToClipboard"
"SimulateMouseMove"
"SimulateMouseClick"
"SimulateMouseDrag"
"SimulateKeyPress"
"SimulatedEventPending"
"AttachWindow"

"DetachWindow"
"AttachedWindowRequestingModality"
"AttachedWindowReleasingModality"
"MLFS`Put"
"MLFS`PutAppend"
"MLFS`Get"
"MLFS`OpenRead"
"MLFS`OpenWrite"
"MLFS`OpenAppend"
"MLFS`Close"

"MLFS`StreamPosition"
"MLFS`SetStreamPosition"
"MLFS`Read"
"MLFS`WriteString"
"MLFS`URLDownload"
"MLFS`FileNames"
"MLFS`CopyFile"
"MLFS`RenameFile"
"MLFS`DeleteFile"
"MLFS`FileByteCount"

"MLFS`FileDate"
"MLFS`SetFileDate"
"MLFS`FileType"
"MLFS`CreateDirectory"
"MLFS`DeleteDirectory"
"MLFS`RenameDirectory"
"MLFS`CopyDirectory"
"UpdateNewPrimitiveStyle"
"Plugin`NewNotebook"
"Plugin`OpenNotebook"

"Plugin`CloseNotebook"
"Plugin`Quit"
"Plugin`AssignParent"
"Plugin`SizeNotebook"
"Plugin`RedrawNotebook"
"Plugin`GetContextMenuForNotebook"

Missing from 10.0.2 that were present in 7:

"ButtonCell"
"Plugin`GetContextMenuForNotebook"

"Plugin`RedrawNotebook"

Present in 10.0.2 and not in 7:

"ActivateLicense"
"ApplyStyle"
"AttachCell"
"AttachedCellParent"
"Bib`ChooseCitationStylePacket"
"Bib`DeleteBibliographyPacket"
"Bib`DeleteCitationsPacket"

"Bib`InsertBibliographyPacket"
"Bib`InsertCitationPacket"
"Bib`InsertNotePacket"
"Bib`InsertSpecificCitationPacket"
"Bib`QueryCitationsPacket"
"Bib`QueryCitationStylesPacket"
"Bib`QueryNoteStylesPacket"
"Bib`RebuildBibliographyPacket"
"Bib`RebuildCitationsPacket"
"Bib`RefreshCitationsPacket"

"Bib`RefreshCitationStylesPacket"
"Bib`SetBibNoteStylePacket"
"Bib`SetCitationStylePacket"
"Boxes"
"BoxReferenceBoxObject"
"CA`QueryAutocompletionPacket"
"CDFDeploy"
"CDFInformation"
"Cells"
"CryptoHash"

"DetachCell"
"ErrorMessage"
"EvaluationBox"
"FinishStartup"
"FlushTextResourceCaches"
"ForwardAndHandle"
"GetMouseAppearance"
"LinguisticTranslateCellPacket"
"NewVersionAction"
"NewVersionAvailable"

"NotebookEvaluate"
"NotebookEvaluateReturn"
"NotebookPredictions"
"OptionCompletionsListPacket"
"OptionValuesCompletionsListPacket"
"ParentBox"
"ParentCell"
"ParentNotebook"
"PastePrediction"
"Plugin`KeyDown"

"Plugin`KeyUp"
"Plugin`MouseDown"
"Plugin`MouseMove"
"Plugin`MouseUp"
"Plugin`NotebookFileError"
"Plugin`OpenNotebookStream"
"Plugin`Print"
"Plugin`Save"
"Plugin`SetActiveWindow"
"Plugin`SetViewRegion"

"Plugin`UpdateScrollPosition"
"Plugin`UpdateScrollPositionRelative"
"RewriteExpressionPacket"
"SampleStyle"
"SelectionSetInlineCellOptions"
"SelectionSetPointStyle"
"SelectionSetRectangleRoundingRadius"
"SetMouseAppearance"
"SetNotebookInList"
"StartTaskTiming"

"StartupAction"
"StopTaskTiming"
"SuppressGraphicsHighlight"
"TemplateCachePacket"
"TickleActivation"
"WindowsCodePage"
"WolframCloud`AssignCloudObject"
"WolframCloud`AutomaticCloudLogin"
"WolframCloud`ConnectionAuthorized"
"WolframCloud`ConnectionCancelled"

"WolframCloud`ConnectionEstablished"
"WolframCloud`ConnectionFailed"
"WolframCloud`ConnectionInitiated"
"WolframCloud`ConnectionTerminated"
"WolframCloud`TaskInformation"
"WolframCloud`UploadComplete"
"WolframCloud`UploadFailed"
"WolframCloud`UploadInitiated"

Missing from 11.0.1 that were present in 10.0.2:

"AttachedWindowReleasingModality"
"AttachedWindowRequestingModality"
"AttachWindow"
"DetachWindow"
"ExperimentalInputMouseCoordinatesPacket"
"GetFunctionCategories"
"HelpBrowserGetListBoxList"
"HelpBrowserLookup"
"HelpBrowserLookupReturnResult"
"HelpBrowserNotebook"

"HelpBrowserSetListBoxItem"
"SelectionAnimate"

Several of these removed packets were for pre-version-6 features. SelectionAnimate is for animating a cell group and the HelpBrowserLookup packets are for opening the v5-style help browser, which was still available in v10 but removed from v11.

Present in 11.0.1 but not in 10.0.2

"CA`CADumpTriePacket"
"FromFileNameString"
"NotebookGetMisspellingsInStringPacket"
"NotebookGetSpellingSuggestionsPacket"
"NotebookToString"

"RemoveMenuCommands"
"WolframCloud`GenerateFileName"
"WolframCloud`GetAuthentication"
"WolframCloud`Logout"