Monitorizar eventos em documentos

Além de atribuir macros a eventos, você pode monitorizar eventos criados por documentos do LibreOffice. Os difusores da API (Application Programming Interface) são responsáveis pelas chamadas a macros de eventos. Diferente dos recetores que requerem a definição de todos os métodos suportados, mesmo que não utilizados, a monitorização de documentos requer somente dois métodos além dos scripts de eventos relacionados.

Ouvir eventos de documentos

Monitoring is illustrated herewith for Basic and Python languages using object-oriented programming. Assigning OnLoad script, to the Open Document event, suffices to initiate and terminate document event monitoring. Tools - Customize menu Events tab is used to assign either scripts.

Intercepting events helps setting scripts pre- and post-conditions such as loading and unloading libraries or track script processing in the background. Access2Base.Trace module usage is illustrating that second context.

Com Python

A monitorização de eventos começa da instanciação do objeto, e termina quando o Python liberta o objeto. Os eventos criados são reportados ao utilizar a consola do Access2Base.

note

OnLoad and OnUnload events can be used to respectively set and unset Python programs path. They are described as Open document and Document closed.



         # -*- coding: utf-8 -*-
         from __future__ import unicode_literals
             
         import os.path, uno, unohelper
         from com.sun.star.document import DocumentEvent, \
             XDocumentEventListener as AdapterPattern
         from com.sun.star.lang import EventObject
             
         class UiDocument(unohelper.Base, AdapterPattern):
             """ Monitorizar eventos de documento """
             '''
             adaptado de 'Python script to monitor OnSave event' de
             https://forum.openoffice.org/en/forum/viewtopic.php?t=68887
             '''
             def __init__(self):
                 """ Monitorizar eventos de documento """
                 ''' reportar utilizando a consola Access2Base.Trace OU
                 reportar na 1.ª folha, 1.ª coluna para documentos do Calc '''
                 ctx = uno.getComponentContext()
                 smgr = ctx.getServiceManager()
                 desktop = smgr.createInstanceWithContext(
                 'com.sun.star.frame.Desktop' , ctx)
                 self.doc = desktop.CurrentComponent
                 #self.row = 0  # remover comentário apenas em documentos do Calc
                 Console.setLevel("DEBUG")
                 self.listen()  # Começar a monitorizar eventos de documento
             
             @property
             def Filename(self) -> str:
                 sys_filename = uno.fileUrlToSystemPath(self.doc.URL)
                 return os.path.basename(sys_filename)
             
             def setCell(self, calcDoc, txt: str):
                 """ Saída dos eventos de doc. na 1.ª coluna de uma folha Calc """
                 sheet = calcDoc.getSheets().getByIndex(0)
                 sheet.getCellByPosition(0,self.row).setString(txt)
                 self.row = self.row + 1
             
             def listen(self, *args):  # OnLoad/OnNew o mais cedo
                 """ Começar monitorização de eventos de documento """
                 self.doc.addDocumentEventListener(self)
                 Console.log("INFO", "Os eventos de documento estão a ser registados", True)
             
             def sleep(self, *args):  # OnUnload por último (opcional)
                 """ Encerrar monitorização de eventos de documento """
                 self.doc.removeDocumentEventListener(self)
                 Console.log("INFO", "Os eventos de documento foram registados", True)
             
             def documentEventOccured(self, event: DocumentEvent):
                 """ Intercetar todos os eventos de documento """
                 #self.setCell(event.Source, event.EventName) # apenas em documentos do Calc
                 Console.log("DEBUG",
                     event.EventName+" in "+self.Filename,
                     False)
             
             def disposing(self, event: EventObject):
                 """ Libertar todas as atividades """
                 self.sleep()
                 Console.show()
             
         def OnLoad(*args):  # evento 'Abrir documento'
             listener = UiDocument()  # Initiates listening
             
         def OnUnload(*args):  # evento 'Documento foi fechado'
             pass  # (opcional) executado quando dispensado
             
         g_exportedScripts = (OnLoad,)
             
         from com.sun.star.script.provider import XScript
         class Console():
             """
             Consola para trás ou para a frente para reportar/registar execução de programa.
             """
             @staticmethod
             def trace(*args,**kwargs):
                 """ Imprimir lista de itens livre na consola """
                 scr = Console._a2bScript(script='DebugPrint', module='Compatible')
                 scr.invoke((args),(),())
             @staticmethod
             def log(level: str, text: str, msgBox=False):
                 """ Anexar mensagem de registo na consola, pergunta opcional ao utilizador """
                 scr = Console._a2bScript(script='TraceLog')
                 scr.invoke((level,text,msgBox),(),())
             @staticmethod
             def setLevel(logLevel: str):
                 """ Definir limite inferior em mensagens de registo """
                 scr = Console._a2bScript(script='TraceLevel')
                 scr.invoke((logLevel,),(),())
             @staticmethod
             def show():
                 """ Exibir o conteúdo ou diálogo da consola """
                 scr = Console._a2bScript(script='TraceConsole')
                 scr.invoke((),(),())
             @staticmethod
             def _a2bScript(script: str, library='Access2Base',
                 module='Trace') -> XScript:
                 ''' Grab application-based Basic script '''
                 sm = uno.getComponentContext().ServiceManager
                 mspf = sm.createInstanceWithContext(
                     "com.sun.star.script.provider.MasterScriptProviderFactory",
                     uno.getComponentContext())
                 scriptPro = mspf.createScriptProvider("")
                 scriptName = "vnd.sun.star.script:"+library+"."+module+"."+script+"?language=Basic&location=application"
                 xScript = scriptPro.getScript(scriptName)
                 return xScript
      
warning

Preste atenção ao erro no método documentEventOccured que herda um erro da LibreOffice Application Programming Interface (API).


Ícone da dica

Start application and Close application events can respectively be used to set and to unset Python path for user scripts or LibreOffice scripts. In a similar fashion, document based Python libraries or modules can be loaded and released using Open document and Document closed events. Refer to Importing Python Modules for more information.


Com LibreOffice Basic

The Onload script is assigned to Open document event using Tools - Customize menu Events tab. Events monitoring starts from the moment a ConsoleLogger object is instantiated and ultimately stops when Basic engine releases it. OnLoad event loads necessary Basic libraries, while caught events are reported using Access2Base.Trace module.


          REM Módulo controller.Events
          Option Explicit
          Private _obj As Object ' instância controller.ConsoleLogger
              
          Sub OnLoad(evt As com.sun.star.document.DocumentEvent) ' >> Abrir documento <<
              _obj = New ConsoleLogger : _obj.Start(evt)
          End Sub ' controller.OnLoad
          ' ----
          REM Módulo de classe controller.ConsoleLogger
          Option Explicit
          Option Compatible
          Option ClassModule
              
          ' ADAPTER design pattern object to be instantiated in the "Open Document" event
          Private Const UI_PROMPT = True
          Private Const UI_NOPROMPT = False ' Set it to True to visualise documents events
              
          ' CONSTRUTOR/DESTRUTOR
          Private Sub Class_Initialize()
          End Sub ' controller.ConsoleLogger.Initialize
          Private Sub Class_Terminate()
          End Sub ' controller.ConsoleLogger.Terminate
              
          ' MEMBERS
          Private _evtAdapter As Object ' com.sun.star.document.XDocumentEventBroadcaster
              
          ' PROPERTIES
          Private Property Get FileName As String
              ''' Nome de ficheiro dependente do Sistema '''
              Const _LIBRARY = "Tools" : With GlobalScope.BasicLibraries
                  If Not .IsLibraryLoaded(_LIBRARY) Then .LoadLibrary(_LIBRARY)
              End With
              Filename = Tools.Strings.FilenameOutofPath(ThisComponent.URL)
          End Property ' controller.ConsoleLogger.Filename
              
          ' METHODS
          Private Sub _documentEventOccured(evt As com.sun.star.document.DocumentEvent)
              ''' Monitorizar eventos de documento '''
              Access2Base.Trace.TraceLog("DEBUG", _
                  evt.EventName &" in "& Filename(evt.Source.URL), _
                  UI_NOPROMPT)
              Select Case evt.EventName
                  Case "OnUnload" : _Stop(evt)
              End Select
          End Sub ' controller.ConsoleLogger._documentEventOccured
              
          Private Sub _disposing(evt As com.sun.star.lang.EventObject)
          End Sub ' controller.ConsoleLogger.disposing
              
          Public Sub Start(Optional evt As com.sun.star.document.DocumentEvent)
              ''' Inicializar registo de eventos de documento '''
              Const _LIBRARY = "Access2Base" : With GlobalScope.BasicLibraries
                  If Not .IsLibraryLoaded(_LIBRARY) Then .LoadLibrary(_LIBRARY)
              End With : Access2Base.Trace.TraceLevel("DEBUG")
              Access2Base.Trace.TraceLog("INFO", _
                  IIf(IsMissing(evt),"",evt.EventName & "-") & "Eventos de documento estão a ser registados", _
                  UI_PROMPT)
              
              _evtAdapter = CreateUnoListener( "_", "com.sun.star.document.XDocumentEventListener" )
              ThisComponent.addDocumentEventListener( _evtAdapter )
          End Sub ' controller.ConsoleLogger.Start
              
          Private Sub _Stop(Optional evt As com.sun.star.document.DocumentEvent)
              ''' Terminar registo de eventos de documento '''
              ThisComponent.removeDocumentEventListener( _evtAdapter )
              Access2Base.Trace.TraceLog("INFO", _
                  IIf(IsMissing(evt),"",evt.EventName & "-") & "Eventos de documento foram registados", _
                  UI_PROMPT)
              Access2Base.Trace.TraceConsole() ' Captured events dialog
          End Sub ' controller.ConsoleLogger._Stop
              
          ' EVENTS
          ' O seu código para tratar eventos segue aqui
      
warning

Preste atenção ao erro no método _documentEventOccured que herda um erro ortográfico da LibreOffice Application Programming Interface (API).


Descobrir eventos de documento

O objeto API emissor fornece a lista de eventos dos quais é responsável:

Com Python


         # -*- coding: utf-8 -*-
         from __future__ import unicode_literals
             
         import uno, apso_utils as ui
             
         def displayAvailableEvents():
             """ Exibir eventos de documento """
             '''
             adaptado de DisplayAvailableEvents() por A. Pitonyak
             https://forum.openoffice.org/en/forum/viewtopic.php?&t=43689
             '''
             ctx = XSCRIPTCONTEXT.getComponentContext()
             smgr = ctx.ServiceManager
             geb = smgr.createInstanceWithContext(
                 "com.sun.star.frame.GlobalEventBroadcaster", ctx)
             events = geb.Events.getElementNames()
             ui.msgbox('; '.join(events))
             
         g_exportedScripts = (displayAvailableEvents,)
      
note

A extensão Alternative Python Script Organizer (APSO) é utilizada para mostrar informações de eventos no ecrã.


Com LibreOffice Basic


         Sub DisplayAvailableEvents
             ''' Exibir eventos de documento '''
             Dim geb As Object ' com.sun.star.frame.GlobalEventBroadcaster
             Dim events() As String
             geb = CreateUnoService("com.sun.star.frame.GlobalEventBroadcaster")
             events = geb.Events.ElementNames()
             MsgBox Join(events, "; ")
         End Sub