Listening to Document Events
Listening to document events can help in the following situations:
-
Identify a new document at opening time, as opposed to existing ones, and perform a dedicated setup.
-
Control the processing of document save, document copy, print or mailmerge requests.
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Recalculate table of contents, indexes or table entries of a Writer document when document is going to be closed
-
Import math Python packages before opening a Calc document. Release these packages when the document closes.
Al costat de assignar macros als esdeveniments, es poden monitoritzar els esdeveniments llençats pels documents LibreOffice. Els emissors de la interfície de programació d'aplicacions (API) són responsables de cridar als scripts dels esdeveniments. A diferència dels oients que requereixen definir tots els mètodes suportats, encara que no s'utilitzen, els monitors de documents només requereixen dos mètodes junt amb els scripts dels esdeveniments connectats.
Monitoring Document Events
Monitoring is illustrated herewith for Basic and Python languages using object-oriented programming. Assigning OnLoad script, to the event, suffices to initiate and terminate document event monitoring. menu 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.
Amb el Python
El monitoratge d'esdeveniments comença des de la instanciació de l'objecte i finalment s'atura quan Python allibera l'objecte. Els informes dels esdeveniments es llencen utilitzant la consola d'Access2Base.
OnLoad and OnUnload events can be used to respectively set and unset Python programs path. They are described as and .
# -*- 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):
""" Monitorar els esdeveniments del document """
'''
adaptat de l'script 'Python per monitoritzar l'esdeveniment OnSave' a
https://forum.openoffice.org/en/forum/viewtopic.php?t=68887
'''
def __init__(self):
"""Monitor d’esdeveniments de documents"""
'''informa usant la consola Access2Base.Trace o
informa al 1r full, 1a columna per a documents del Calc'''
ctx = uno.getComponentContext()
smgr = ctx.getServiceManager()
desktop = smgr.createInstanceWithContext(
'com.sun.star.frame.Desktop' , ctx)
self.doc = desktop.CurrentComponent
#self.row = 0 # descomentar només pels documents del Calc
Console.setLevel("DEBUG")
auto.listen() # Inicia el monitoreig d'esdeveniments de documents.
@property
def Filename(self) -> str:
sys_filename = uno.fileUrlToSystemPath(self.doc.URL)
return os.path.basename(sys_filename)
def setCell(self, calcDoc, txt: str):
"""Eixida dels esdeveniments del document a la primera columna d'un full de càlcul"""
sheet = calcDoc.getSheets().getByIndex(0)
sheet.getCellByPosition(0,self.row).setString(txt)
self.row = self.row + 1
def listen(self, *args): # OnLoad/OnNew la primera vegada
"""Inicia el seguiment d'esdeveniments del document """
self.doc.addDocumentEventListener(self)
Console.log("INFO" "Els esdeveniments del document s'estan registrant", True)
def sleep(self *args) # OnUnload la darrera (opcional)
"""Atura el seguiment dels esdeveniments del document"""
self.doc.removeDocumentEventListener(self)
Console.log("INFO" "Els esdeveniments del document s'han registrat", True)
def documentEventOccured(self, event: DocumentEvent):
"""Intercepta tots els esdeveniments del document""
#self.setCell(event.Source, event.EventName) # only for Calc docs
Console.log("DEBUG",
event.EventName+" in "+self.Filename,
False)
def disposing(self, event: EventObject):
"""Allibera totes les activitats"""
self.sleep()
Console.show()
def OnLoad(*args) # Esdeveniment 'Open Document'
listener = UiDocument() # Initiates listening
def OnUnload(*args) # Esdeveniment 'El document s'ha tancat'
pass # (opcional) realitzat durant la supressió
g_exportedScripts = (OnLoad,)
from com.sun.star.script.provider import XScript
class Console():
"""
(Back/Fore)ground console to report/log program execution.
"""
@staticmethod
def trace(*args,**kwargs):
""" Print free item list to console """
scr = Console._a2bScript(script='DebugPrint', module='Compatible')
scr.invoke((args),(),())
@staticmethod
def log(level: str, text: str, msgBox=False):
""" Append log message to console, optional user prompt """
scr = Console._a2bScript(script='TraceLog')
scr.invoke((level,text,msgBox),(),())
@staticmethod
def setLevel(logLevel: str):
""" Set log messages lower limit """
scr = Console._a2bScript(script='TraceLevel')
scr.invoke((logLevel,),(),())
@staticmethod
def show():
""" Display console content/dialog """
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
Observeu l'error que hi ha al mètode documentEventOccured, que ha heretat una falta d'ortografia de la interfície de programació d'aplicacions (API, segles en anglés) del LibreOffice.
and 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 and events. Refer to Importing Python Modules for more information.
Amb el LibreOffice Basic
Using menu tab, the event fires a ConsoleLogger initialisation. _documentEventOccured routine - set by ConsoleLogger - serves as a unique entry point to trap all document events.
controller.Events module
Option Explicit
Global _obj As Object ' controller.ConsoleLogger instance
Sub OnLoad(evt As com.sun.star.document.DocumentEvent) ' >> Open Document <<
_obj = New ConsoleLogger : _obj.StartAdapter(evt)
End Sub ' controller.OnLoad
Sub _documentEventOccured(evt As com.sun.star.document.DocumentEvent)
''' ConsoleLogger unique entry point '''
_obj.DocumentEventOccurs(evt)
End Sub ' controller._documentEventOccured
controller.ConsoleLogger class module
Events monitoring starts from the moment a ConsoleLogger object is instantiated and ultimately stops upon document closure. StartAdapter routine loads necessary Basic libraries, while caught events are reported using Access2Base.Trace module.
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
' MEMBRES
Private _evtAdapter As Object ' com.sun.star.document.XDocumentEventBroadcaster
Private _txtMsg As String ' text message to log in console
' PROPERTIES
Private Property Get FileName As String
''' nom de fitxer depenent del 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
' MÈTODES
Public Sub DocumentEventOccurs(evt As com.sun.star.document.DocumentEvent)
''' Monitor document events '''
Access2Base.Trace.TraceLog("DEBUG", _
evt.EventName &" in "& Filename(evt.Source.URL), _
UI_NOPROMPT)
Select Case evt.EventName
Case "OnUnload" : _StopAdapter(evt)
End Select
End Sub ' controller.ConsoleLogger.DocumentEventOccurs
Public Sub StartAdapter(Optional evt As com.sun.star.document.DocumentEvent)
''' Initialize document events logging '''
Const _LIBRARY = "Access2Base" : With GlobalScope.BasicLibraries
If Not .IsLibraryLoaded(_LIBRARY) Then .LoadLibrary(_LIBRARY)
End With : Access2Base.Trace.TraceLevel("DEBUG")
If IsMissing(evt) Then _txtMsg = "" Else _txtMsg = evt.EventName & "-"
Access2Base.Trace.TraceLog("INFO", _txtMsg & "Document events are being logged", UI_PROMPT)
_evtAdapter = CreateUnoListener( "_", "com.sun.star.document.XDocumentEventListener" )
ThisComponent.addDocumentEventListener( _evtAdapter )
End Sub ' controller.ConsoleLogger.StartAdapter
Private Sub _StopAdapter(Optional evt As com.sun.star.document.DocumentEvent)
''' Terminate document events logging '''
ThisComponent.removeDocumentEventListener( _evtAdapter )
If IsMissing(evt) Then _txtMsg = "" Else _txtMsg = evt.EventName & "-"
Access2Base.Trace.TraceLog("INFO", _txtMsg & "Document events have been logged", UI_PROMPT)
Access2Base.Trace.TraceConsole() ' Captured events dialog
End Sub ' controller.ConsoleLogger._StopAdapter
' EVENTS
' Your code for handled events goes here
Mind the misspelled _documentEventOccured method that inherits a typo from LibreOffice Application Programming Interface (API).
Discovering Documents Events
The broadcaster API object provides the list of events it is responsible for:
With Python
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import uno, apso_utils as ui
def displayAvailableEvents():
""" Display document events """
'''
adapted from DisplayAvailableEvents() by 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,)
The Alternative Python Script Organizer (APSO) extension is used to render events information on screen.
Amb el LibreOffice Basic
Sub DisplayAvailableEvents
''' Display document events '''
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