Re: Accessing script run handler from NSAppleScript
Re: Accessing script run handler from NSAppleScript
- Subject: Re: Accessing script run handler from NSAppleScript
- From: has <email@hidden>
- Date: Fri, 4 Jan 2008 22:46:36 +0000
email@hidden wrote:
I am trying to call as wide as possible a variety of AppleScripts
from cocoa using NSAppleScript and am having trouble
finding a way of calling a script with a parameterised run handler.
[...]
Calling the run handler explicitly by name with NSAppleScript -
executeAppleEvent results in:
Error -1708 occured the run(Hello) call: (null)
'run' is an AppleScript-defined keyword, not a user-defined
identifier, so make sure you're using the appropriate AE codes
('aevt'/'oapp' in this case). Example:
#import "Appscript/Appscript.h"
int main (int argc, const char * argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
// Create AEMApplication object for building AEMEvents
AEMApplication *app = [[AEMApplication alloc] init];
// Create AEMCodecs object for unpacking script results
AEMCodecs *codecs = [[AEMCodecs alloc] init];
// Build parameter list for script
NSArray *params = [NSArray arrayWithObjects:@"Hello ", @"World!", nil];
// Create 'aevtoapp' (AppleScript subroutine) AEMEvent
AEMEvent *evt = [app eventWithEventClass:kCoreEventClass
eventID:kAEOpenApplication];
// Add parameter list to AEMEvent
[evt setParameter:params forKeyword:keyDirectObject];
// Compile (or load) the AppleScript
NSAppleScript *scpt = [[NSAppleScript alloc] initWithSource:
@"on run {arg1, arg2}\n"
@" return arg1 & arg2\n"
@"end run"];
// Get an NSAppleEventDescriptor from AEMEvent
NSAppleEventDescriptor *evtDesc = [evt appleEventDescriptor];
// Send event to AppleScript
NSDictionary *error;
NSAppleEventDescriptor *resDesc = [scpt executeAppleEvent:evtDesc
error:&error];
// Unpack script result
id res = [codecs unpack:resDesc];
NSLog(@"Result = %@", res); // "Result = Hello World!"
[scpt release];
[codecs release];
[app release];
[pool release];
return 0;
}
Notes:
- An aevt/oapp event will work even for scripts that don't have
explicit run handlers.
- While you must pass all parameters expected by the script, any
excess parameters are simply ignored. That means you can always pass
parameters, and if the script doesn't need them it can simply ignore
them.
has
--
http://appscript.sourceforge.net
http://rb-appscript.rubyforge.org
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