I think this is dependant on the Variable Preservation setting on the Preferences Script Editor tab.
I use script local variables a lot in conjunction with handlers to access them from other objects instead of custom properties. I started doing it because custom properties are visible to users in password protected stacks whereas script local variables are not. Pete lcSQL Software <http://www.lcsql.com> Home of lcStackBrowser <http://www.lcsql.com/lcstackbrowser.html> and SQLiteAdmin <http://www.lcsql.com/sqliteadmin.html> On Sat, Feb 22, 2014 at 8:04 AM, Earthednet-wp <proth...@earthednet.org>wrote: > Mats' posting on encryption difficulties got me thinking about local > variables. Are they supposed to persist after the script is done executing, > so that the next time a handler within that script is called, they can be > expected to hold previously set values? I notice that they don't. Or would > this be a task for custom properties? > Bill > > William Prothero > http://es.earthednet.org > > > On Feb 22, 2014, at 2:54 AM, Peter W A Wood <peterwaw...@gmail.com> > wrote: > > > > Many thanks to Roger Eller, Jan Schenkel, Bill Vlahos and Paul Hibbert > (off list) for helping me identify and workaround the issues I encountered. > > > > Paul pointed out three things: I didn't the use "the text of Field ..."; > how to overcome not being able to copy text from a field in an OS X > standalone; and the final problem that was related to script local > variables. > > > > Using "the text of Field ..." instead of "Field ..." helped to more > accurately copy and paste data. (I ended up displaying the encrypted data > in Hex anyway.) > > > > I had found that I couldn't copy from a Field in an OS X standalone. > Paul provide a script with group handlers to get around the problem. I have > submitted a bug report which has been accepted - > http://quality.runrev.com/show_bug.cgi?id=11830 > > > > At this stage, I was still getting inconsistent results when encrypting > data in the IDE or a standalone. Then Paul noticed how I was initialising > the encryption parameters, namely the script local variables tPassword, > tSalt, tIV: > > > > openStack > > put "" into Field "Encrypted" > > put "12345678123456781234567812345678" into tPassword > > put "12345678123456781234567812345678" into tSalt > > put "12345678123456781234567812345678" into tIV > > end openStack > > > > on encryptMSG > > ... > > end encryptMSG > > > > on decryptMSG > > ... > > end decryptMSG > > > > He changed this to re-setting the three script local fields each time > they were used: > > > > on openStack > > put "" into Field "Encrypted" > > end openStack > > > > command setPassCodes > > put "12345678123456781234567812345678" into tPassword > > put "12345678123456781234567812345678" into tSalt > > put "12345678123456781234567812345678" into tIV > > end setPassCodes > > > > on encryptMSG > > setPassCodes > > ... > > end encryptMSG > > > > on decryptMSG > > setPassCodes > > ... > > end decryptMSG > > > > After making this change, I now get identical results when encrypting > data with the stack in the IDE or as a standalone. > > > > I have also entered a bug report for this - > http://quality.runrev.com/show_bug.cgi?id=11832 - I feel there is a bug > but not in the encrypt/decrypt functions, it's in the handling of script > local variables. > > > > Once again, thanks for all the help. > > > > Kind regards > > Peter > > http://LiveCode1001.blogspot.com > > > > > > > > _______________________________________________ > > use-livecode mailing list > > use-livecode@lists.runrev.com > > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > > http://lists.runrev.com/mailman/listinfo/use-livecode > > _______________________________________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode > _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
