Revision: 14593
http://harbour-project.svn.sourceforge.net/harbour-project/?rev=14593&view=rev
Author: druzus
Date: 2010-05-25 22:04:04 +0000 (Tue, 25 May 2010)
Log Message:
-----------
2010-05-26 00:03 UTC+0200 Przemyslaw Czerpak (druzus/at/priv.onet.pl)
* harbour/contrib/hbwin/Makefile
+ harbour/contrib/hbwin/hbolesrv.c
+ added inproc OLE server implementation. It allows to create OLE/ACTIVEX
COM server in Harbour. Such OLE server allows can be used by programs
written in any languages supporting OLE automation (also in other
Harbour applications)
User ole server code should be linked as DLL which later can be
register in MS-Windows by regsvr32.exe program, i.e.:
regsvr32 myolesrv.dll
The OLE server code should contain DLLMAIN() PRG function which
is executed just after loading OLE inproc DLL server as server from
other application and also by regsrv32.exe during registration and
unregistration procedure. It has to initialize at least OLE server
ID and name usinf WIN_OleServerInit().
+ added new PRG function which intitialize OLE server:
WIN_OleServerInit( <cClassID>, <cServerName>, ;
[ <hAction> | <oAction> | <bAction> | <sAction> ], ;
[ <lHashClone> | <lAcceptAll> ] ) -> <lServerActive>
<cClassID> is registered OLE server class GUID
<cServerName> is OLE server class name
<hAction> is optional parameter with hash array containing messages
and instance variables used by OLE server. The keys in hash array
are strings with message names and values are actions. Codeblock
and symbol items means that given message is a method call and
any other value means that it's variable.
By default the same hash array is shared between all objects
created by registered server. It's important when hash array
contains values which are neither codeblock nor symbol items
so they are not used as method but rather as instance variables
because such instance variables are shared between OLE objects.
Setting 4-th parameter <lHashClone> to .T. causes that each
objects receives it's own copy of <hAction> item so instance
variables inside hash array are also local to OLE object.
Alternatively programmer can use <bAction> or <sAction> to create
seprate copy of hash array for each object, i.e.:
bAction := {|| hb_hClone( hValue ) }
When hash array contains symbol item (@funcName()) then when it's
executed by OLE object message it's possible to access the hash
array bound with given OLE object using QSelf() function. It maybe
useful if hash array contains instance variables and programmer
wants to access them.
Please remember that using hash array which was initialized to keep
original assign order by HB_HKEEPORDER( <hAction>, .T. ) before
adding its items you can define strict message numbers (DISPIDs), i.e.:
hAction := {=>}
HB_HKEEPORDER( hAction, .T. )
hAction[ "OPEN" ] := @myole_open() // DISPID=1
hAction[ "CLOSE" ] := @myole_close() // DISPID=2
hAction[ "SAVE" ] := @myole_save() // DISPID=3
hAction[ "LOAD" ] := @myole_load() // DISPID=4
hAction[ "PRINT" ] := @myole_print() // DISPID=5
(see example in olesrv2.prg)
<oAction> is optional parameter with Harbour object which is used
as base for all newly created OLE objects. All messages (method and
instance variables) supported explicitly by <oAction> object (except
ONERROR message redirecting) are inherited by OLE objects. Each
newly created OLE object uses the same <oAction> object so its
instance variables are shared between all of them. If programmer
wants to create separate Harbour object for each OLE object then
he should use <bAction> or <sAction>, i.e.:
bAction := {|| myClass():new() }
<bAction> is optional parameter with codeblock executed when new
OLE object is created. It should return hash array or Harbour object
which will be used as base for newly created OLE object.
<sAction> is optional parameter with function symbol. This function
is executed when new OLE object is created and should return hash
array or Harbour object which is used as base for newly created
OLE object.
If the 3-rd parameter is <oAction>, <bAction> or <sAction> then
it's possible to also set 4-th parameter <lAcceptAll> to .T. and
in such case <xAction> parameter is used in different way. Newly
created OLE object accepts any massage names invoking for each
of them EVAL() message which is sent to <xAction> with OLE message
name inserted as the 1-st item to OLE object parameters.
It allows to create OLE server which will accept unknown messages
redirecting them to some other code, i.e.:
if netio_connect( cServer,,, cPasswd )
WIN_OleServerInit( cClassID, cServerName, @netio_funcExec(), .T. )
endif
initialize OLE server which redirects all messages to default netio
connection establish by netio_connect().
If 3-rd parameter is not given then all HVM functions becomes
OLE methods and HVM memvars (public and private variables) are
OLE object instance variables so they are shared with all OLE
objects created by this interface. It works just like xHarbour.com
OLE server described at
http://xharbour.com/index.asp?page=add_on_oleserver&show_sub=7&show_i=1
; TODO: add support for MT RPC servers. Current implementation cannot
be safely used in MT programs creating OLE objects and executing
their methods simultaneously in different threads without
additional user code which will serialize these operations.
; TODO: replace message handler API in WIN_AxGetControl()/
__AxRegisterHandler() which uses only fixed method IDs
and do not support method names with above one so user
can easy create activex controls which support message
names. This modificaiton will force updating user and 3-rd
party code but IMO should be done. Current interface is
simply too much limited to keep it.
; Possible TODO: add support for user defined fixed message numbers
(DISPIDs) which are not continuous small numbers so
users cannot easy use hash arrays with strict order.
Is such functionality necessary? Can someone with
ActiveX experience say sth about it?
Above implementation has undocumented feature:
it supports hash arrays with keys using numbers only
which can be used like in __AxRegisterHandler() but
I haven't decided yet I should keep, extend or remove
such functionality.
Please make real life test.
I do not have any practice with MS-Windows and OLE and most of above
code I wrote using only documentation so I'm very interesting in real
test results and user opinions about it. If some important functionality
is missing then please inform me about it.
BTW There are some 3-rd party activex implementation for [x]Harbour, i.e.
xharbour.com or FiveWin ones. Maybe someone familiar with them can create
PRG compatibility layer for Harbour. I cannot do that myself because I
do not know that products and their PRG API used in OLE/COM/ActiveX
implementations but if someone can describe it then I can help in such
implementation.
+ harbour/contrib/hbwin/hbolesrv.def
+ harbour/contrib/hbwin/hbolesrv-mgw.def
+ harbour/contrib/hbwin/hbolesrv-ow.def
+ added .DEF link files which are necessary to correctly export
inproc OLE server DLL functions. It's possible that other compilers
or even different versions of the same compilers may use different
a little bit different .DEF files. I tested above with BCC5.5,
MinGW 3.4.5 and OpenWatcom 1.8.
+ harbour/contrib/hbwin/test/olesrv1.prg
+ harbour/contrib/hbwin/test/olesrv1.hbp
+ harbour/contrib/hbwin/test/oletst1.prg
+ harbour/contrib/hbwin/test/oletst1.hbp
+ added example of NETIO-RPC OLE server code with Harbour (PRG) client.
This server redirects all messages sent to its OLE objects to remote
HBNETIO server as function calls. It understands the following
messages:
CONNECT() - creates connection to the server, parameters like in
NETIO_CONNECT() and NETIO_GETCONNECTION() functions
DISCONNECT() - closes current connection
PROCEXISTS() - works like NETIO_PROCEXISTS()
PROCEXEC() - works like NETIO_PROCEXEC()
PROCEXECW() - works like NETIO_PROCEXECW()
FUNCEXEC() - works like NETIO_FUNCEXEC()
All other messages are redirected directly to RPS server as function
calls.
CONNECT() message should be executed by client to create
connection to the server. Each NETIO-RPC OLE object uses its own
connection which should be initialized. If CONNECT() is executed
more then once the current connection is closed.
DISCONNECT() is executed automatically when OLE object is destroyed
so it's not necessary to call it explicitly.
Please use hbmk2 and olesrv1.hbp to compile OLE server. OLE inproc
servers have to export some DLL entry functions which are defined
in .def files which have to be passed to linker.
Before client code can be tested the server has to be registered.
The server can be registered in given MS-Windows system using
regsvr32.exe command. To register the server use:
regsvr32 olesrv1.dll
and to unregister:
regsvr32 /u olesrv1.dll
+ harbour/contrib/hbwin/test/olesrv2.prg
+ harbour/contrib/hbwin/test/olesrv2.hbp
+ harbour/contrib/hbwin/test/oletst2.prg
+ harbour/contrib/hbwin/test/oletst2.hbp
+ added very simple example of OLE server using hash array with
strict item order (associative hash array) to define OLE objects
with fixed message numbers (DISPIDs)
Remember about registering the server by 'regsvr32 olesrv2.dll'
+ harbour/contrib/hbwin/test/olesrv3.prg
+ harbour/contrib/hbwin/test/olesrv3.hbp
+ harbour/contrib/hbwin/test/oletst3.prg
+ harbour/contrib/hbwin/test/oletst3.hbp
+ harbour/contrib/hbwin/test/oletst3.bas
+ added example of OLE server code with Harbour (PRG)
and Visual Basic (BAS) clients.
This server redirects all messages sent to its OLE objects to HVM
functions and messages to HVM memver (public and private) variables
This server should work as xHarbour.com OLE servers described at:
http://xharbour.com/index.asp?page=add_on_oleserver&show_sub=7&show_i=1
The server and clients code are nearly the same so users can easy
compare them.
Remember about registering the server by 'regsvr32 olesrv2.dll'
Modified Paths:
--------------
trunk/harbour/ChangeLog
trunk/harbour/contrib/hbwin/Makefile
Added Paths:
-----------
trunk/harbour/contrib/hbwin/hbolesrv-mgw.def
trunk/harbour/contrib/hbwin/hbolesrv-ow.def
trunk/harbour/contrib/hbwin/hbolesrv.c
trunk/harbour/contrib/hbwin/hbolesrv.def
trunk/harbour/contrib/hbwin/tests/olesrv1.hbp
trunk/harbour/contrib/hbwin/tests/olesrv1.prg
trunk/harbour/contrib/hbwin/tests/olesrv2.hbp
trunk/harbour/contrib/hbwin/tests/olesrv2.prg
trunk/harbour/contrib/hbwin/tests/olesrv3.hbp
trunk/harbour/contrib/hbwin/tests/olesrv3.prg
trunk/harbour/contrib/hbwin/tests/oletst1.hbp
trunk/harbour/contrib/hbwin/tests/oletst1.prg
trunk/harbour/contrib/hbwin/tests/oletst2.hbp
trunk/harbour/contrib/hbwin/tests/oletst2.prg
trunk/harbour/contrib/hbwin/tests/oletst3.bas
trunk/harbour/contrib/hbwin/tests/oletst3.hbp
trunk/harbour/contrib/hbwin/tests/oletst3.prg
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