Monitoring Document Events
Next to assigning macros to events, one can monitor events raised by Collabora Office documents. Application Programming Interface (API) broadcasters are responsible for calling event scripts. Unlike listeners that require to define all supported methods, even if unused, document monitors require only two methods next to hooked event scripts.
Listening to Document Events
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. 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.
With Python
Events monitoring starts from object instantiation and ultimately stops when Python releases the object. Raised events are reported using Access2Base console.
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):
""" Monitor document events """
'''
adapted from 'Python script to monitor OnSave event' at
https://forum.openoffice.org/en/forum/viewtopic.php?t=68887
'''
def __init__(self):
""" Document events monitor """
''' report using Access2Base.Trace console OR
report in 1st sheet, 1st column for Calc docs '''
ctx = uno.getComponentContext()
smgr = ctx.getServiceManager()
desktop = smgr.createInstanceWithContext(
'com.sun.star.frame.Desktop' , ctx)
self.doc = desktop.CurrentComponent
#self.row = 0 # uncomment for Calc documents only
Console.setLevel("DEBUG")
self.listen() # Start monitoring doc. events
@property
def Filename(self) -> str:
sys_filename = uno.fileUrlToSystemPath(self.doc.URL)
return os.path.basename(sys_filename)
def setCell(self, calcDoc, txt: str):
""" Output doc. events on 1st column of a Calc spreadsheet """
sheet = calcDoc.getSheets().getByIndex(0)
sheet.getCellByPosition(0,self.row).setString(txt)
self.row = self.row + 1
def listen(self, *args): # OnLoad/OnNew at the earliest
""" Start doc. events monitoring """
self.doc.addDocumentEventListener(self)
Console.log("INFO", "Document events are being logged", True)
def sleep(self, *args): # OnUnload at the latest (optional)
""" Stop doc. events monitoring """
self.doc.removeDocumentEventListener(self)
Console.log("INFO", "Document events have been logged", True)
def documentEventOccured(self, event: DocumentEvent):
""" Intercepts all doc. events """
#self.setCell(event.Source, event.EventName) # only for Calc docs
Console.log("DEBUG",
event.EventName+" in "+self.Filename,
False)
def disposing(self, event: EventObject):
""" Release all activities """
self.sleep()
Console.show()
def OnLoad(*args): # 'Open Document' event
listener = UiDocument() # Initiates listening
def OnUnload(*args): # 'Document has been closed' event
pass # (optional) performed when disposed
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
Mind the misspelled documentEventOccured method that inherits a typo from Collabora Office Application Programming Interface (API).
Start application and Close application events can respectively be used to set and to unset Python path for user scripts or Collabora Office 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.
With Collabora Office Basic
The Onload script is assigned to Open document event using menu 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 controller.Events module
Option Explicit
Private _obj As Object ' controller.ConsoleLogger instance
Sub OnLoad(evt As com.sun.star.document.DocumentEvent) ' >> Open Document <<
_obj = New ConsoleLogger : _obj.Start(evt)
End Sub ' controller.OnLoad
' ----
REM controller.ConsoleLogger class module
Option Explicit
Option Compatible
Option ClassModule
' ADAPTER design pattern object to be instantiated in « Open Document » event
Private Const UI_PROMPT = True
Private Const UI_NOPROMPT = False ' Set it to True to visualise documents events
' CONSTRUCTOR/DESTRUCTOR
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
''' System-dependent filename '''
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)
''' Monitor document events '''
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)
''' Initialize document events logging '''
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 & "-") & "Document events are being logged", _
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)
''' Terminate document events logging '''
ThisComponent.removeDocumentEventListener( _evtAdapter )
Access2Base.Trace.TraceLog("INFO", _
IIf(IsMissing(evt),"",evt.EventName & "-") & "Document events have been logged", _
UI_PROMPT)
Access2Base.Trace.TraceConsole() ' Captured events dialog
End Sub ' controller.ConsoleLogger._Stop
' EVENTS
' Your code for handled events goes here
Mind the misspelled _documentEventOccured method that inherits a typo from Collabora Office 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.
With Collabora Office 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