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Inside Macintosh: Interapplication Communication /

Chapter 10 - Scripting Components / Scripting Components Reference

Optional Scripting Component Routines / Executing Scripts in One Step

OSACompileExecute

You can use the OSACompileExecute routine to compile and execute a script in a single step rather than calling OSACompile and OSAExecute.

FUNCTION OSACompileExecute 
                  (scriptingComponent: ComponentInstance;
                   sourceData: AEDesc; 
                   contextID: OSAID; modeFlags: LongInt; 
                   VAR resultingScriptValueID: OSAID): OSAError;

scriptingComponent

A component instance created by a prior call to the Component Manager function OpenDefaultComponent or OpenComponent (see page 10-4).

sourceData

A descriptor record identifying suitable source data for the specified scripting component.

contextID

The script ID for the context to be used during script execution. The constant kOSANullScript in this parameter indicates that the scripting component should use its default context.

modeFlags

Information used by individual scripting components. To avoid setting mode flag values, specify kOSAModeNull. Other possible mode flags are listed in the description that follows.

resultingScriptValueID

The script ID for the script value returned.

DESCRIPTION

The OSACompileExecute function compiles source data and executes the resulting compiled script, using the script context identified by the contextID parameter to maintain state information such as the binding of variables. After successfully executing the script, OSACompileExecute disposes of the compiled script and returns either the script ID for the resulting script value or, if execution does not result in a value, the constant kOSANullScript.

You can control the way in which the scripting component executes a script by adding any of these flags to the modeFlags parameter:

Flag	Description
kOSAModeNeverInteract	Adds kAENeverInteract to sendMode parameter of AESend for events sent when script is executed.
kOSAModeCanInteract	Adds kAECanInteract to sendMode parameter of AESend for events sent when script is executed.
kOSAModeAlwaysInteract	Adds kAEAlwaysInteract to sendMode parameter of AESend for events sent when script is executed.
kOSAModeCantSwitchLayer	Prevents use of kAECanSwitchLayer in sendMode parameter of AESend for events sent when script is executed (the opposite of the Apple Event Manager's interpretation of the same bit).
kOSAModeDontReconnect	Adds kAEDontReconnect to sendMode parameter of AESend for events sent when script is executed.
kOSAModeDoRecord	Prevents use of kAEDontRecord in sendMode parameter of AESend for events sent when script is executed (the opposite of the Apple Event Manager's interpretation of the same bit).

If the result code returned by OSACompileExecute is a general result code, there was some problem in arranging for the script to be run. If the result code is errOSAScriptError, an error occurred during script execution. In this case, you can obtain more detailed error information by calling OSAScriptError.

RESULT CODES

noErr	0	No error
errOSACantCoerce	-1700	Data could not be coerced to the requested data type
errOSASystemError	-1750	General scripting system error
errOSAInvalidID	-1751	Invalid script ID
errOSAScriptError	-1753	Source data invalid (syntax error) or an execution error occurred
badComponentInstance	$80008001	Invalid component instance