Scripting system

• US 5,404,528 A
• Filed: 01/19/1993
• Issued: 04/04/1995
• Est. Priority Date: 01/19/1993
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Information Systems Incorporated (Canon Inc.)
• Inventors: Mahajan, Rakesh
• Primary Examiner(s): Heckler, Thomas M.
• Application Number:
  US08/005,767
• Time in Patent Office: 805 Days
• Field of Search: 395/700, 371/25.1
• US Class Current: 719/320
• CPC Class Codes: G06F 9/45508 Runtime interpretation or emulation, e g. emulator loops, bytecode interpretation
• CPC Class Codes: G06F 9/45512 Command shells

Abstract

A scripting system for scripting functionality in an application program. A script interpreter which is instantiated as an object separate from the application program is provided to interpret scripts. The script interpreter contains a list of scripts that may be invoked and a list of corresponding trigger events that cause the scripts to be invoked. The scripts, which are separate from both the application program and the script interpreter, contain script language commands which include commands to execute functions in the application program. The application program is responsible both for defining the functions that it will make available for execution from scripts, as well as for indicating to the script interpreter that a particular type of event has occurred. In response to an indication from the application program that a trigger event has occurred, the script interpreter will interpret the appropriate script to execute the scripting commands, and in particular to execute application program functions when they are encountered in the script.

Claims

1. A computer--implemented method for scripting an application program function comprising the steps of:

instantiating a script interpreter, the script interpreter being responsive to a trigger event such that in response to the trigger event the script interpreter interprets scripts commands in an attached script;

attaching a script to the script interpreter, the script defining a script event by which the script is triggered, the script further including script commands including a command to execute the application program function; and

executing the application program to detect a trigger event and providing the script interpreter with the detected trigger event.

2. A method according to claim 1, further comprising the step of executing the script interpreter in response to detection of a trigger event to interpret corresponding scripts.

3. A method according to claim 2, wherein in said executing step, in response to interpreting a command to execute the application program function, the script interpreter invokes the application program function.

4. A method according to claim 1, further comprising the step of forming a library list which includes an entry point for the application program function.

5. A method according to claim 4, wherein the script interpreter refers to the library list in response to interpreting a script command to execute the application program function.

6. A method according to claim 4, wherein the library list forming step includes the step of forming a library list of entry points for utility functions, and wherein the attached script includes script commands to execute utility functions.

7. A method according to claim 6, wherein the script interpreter refers to the library list in response to interpreting a script command to execute the utility function.

8. A method according to claim 6, wherein the utility functions include a function to set a trigger event.

9. A method according to claim 6, wherein the utility functions include a function to invoke another script.

10. A method according to claim 6, wherein the utility functions include a function to determine whether an event is set.

11. A method according to claim 4, wherein said library list forming step includes the step of forming a library list which includes entry points for a function from a second application program.

12. A method according to claim 11, wherein the script interpreter refers to the library list in response to interpreting a script command to execute the function exported from the second application program.

13. A method according to claim 1, wherein script commands include commands to execute utility functions.

14. A method according to claim 13, wherein the utility functions include a function to set a trigger event.

15. A method according to claim 13, wherein the utility functions include a function to invoke another script.

16. A method according to claim 13, wherein the utility functions include a function to determine whether an event is set.

17. A method according to claim 1, wherein the script commands include commands to execute a function from a second application program.

18. A computer--implemented method for scripting exported application program functions comprising the steps of:

forming an initialization file that includes a dynamic link library list for an entry point to the exported application program function;

instantiating a script interpreter, the script interpreter being responsive to a trigger event to trigger an attached script;

attaching a script to the script interpreter, the script defining a script event by which the script is triggered, the script further including script commands including commands to execute the exported application program function;

indexing into the script interpreter a correlation list of attached scripts and script events by which the attached scripts are triggered;

executing the application program to detect a trigger event and providing the script interpreter with the detected trigger event; and

executing the script interpreter in response to a detected trigger event, said executing step including the step of interpreting the script commands in the attached script that corresponds to the trigger event listed in the correlation list of attached scripts, said interpreting step including the step of executing the exported application program function based on the entry point listed in the dynamic link library in response to interpreting a script command to execute the exported application program function.

19. A method according to claim 18, wherein said initialization file forming step includes the step of forming an initialization file of entry points for utility functions, and wherein the attached script includes script commands to execute utility functions.

20. A method according to claim 19, wherein the script interpreter refers to the initialization file in response to interpreting a script command to execute the utility function.

21. A method according to claim 19, wherein the utility functions include a function to set a trigger event.

22. A method according to claim 19, wherein the utility functions include a function to invoke another script.

23. A method according to claim 19, wherein the utility functions include a function to determine whether an event is set.

24. A method according to claim 18, wherein said initialization file forming step includes the step of forming an initialization file to entry points for a function exported from a second application program.

25. A method according to claim 24, wherein the script interpreter refers to the initialization file in response to interpreting a script command to execute the function exported from the second application program.

26. A method according to claim 18, wherein script commands include commands to execute utility functions.

27. A method according to claim 26, wherein the utility functions include a function to set a trigger event.

28. A method according to claim 26, wherein the utility functions includes a function to invoke another script.

29. A method according to claim 26, wherein the utility functions include a function to determine whether an event is set.

30. A method according to claim 18, wherein the script commands include commands to execute a function from a second application program.

31. A computerized apparatus for scripting exported functionality from an application program, said apparatus comprising:

a memory for storing (a) an application program which includes an entry point for the exported functionality, (b) a script interpreter, the script interpreter being responsive to a trigger event such that in response to the trigger event the script interpreter interprets script commands in an attached script, and (c) a script which defines a script event by which the script is triggered and which includes script commands to execute the exported functionality of the application program; and

a processor for instantiating the script interpreter, for attaching the script to the script interpreter, and for executing the application program so as to detect a trigger event and so as to provide the script interpreter with the detected trigger event;

wherein in response to the detected trigger event, the script interpreter interprets the script commands in the attached script so as to cause the exported functionality of the application program to be executed commencing from the entry point of the application program.

32. An apparatus according to claim 31, wherein said memory stores a library list which includes the entry point for the exported functionality of the application program.

33. An apparatus according to claim 32, wherein the script interpreter refers to the library list in response to interpreting a script command to execute the application program function.

34. An apparatus according to claim 32, wherein the library list includes entry points for utility functions, and wherein the attached script includes script commands to execute utility functions.

35. An apparatus according to claim 34, wherein the script interpreter refers to the library list in response to interpreting a script command to execute the utility function.

36. An apparatus according to claim 34, wherein the utility functions include a function to set a trigger event.

37. An apparatus according to claim 34, wherein the utility functions include a function to invoke another script.

38. An apparatus according to claim 34, wherein the utility functions include a function to determine whether an event is set.

39. An apparatus according to claim 32, wherein the library list includes entry points for a function from a second application program.

40. An apparatus according to claim 39, wherein the script interpreter refers to the library list in response to interpreting a script command to execute the function exported from the second application program.

41. An apparatus according to claim 31, wherein script commands include commands to execute utility functions.

42. An apparatus according to claim 41, wherein the utility functions include a function to set a trigger event.

43. An apparatus according to claim 42, wherein the utility functions include a function to invoke another script.

44. An apparatus according to claim 42, wherein the utility functions include a function to determine whether an event is set.

45. An apparatus according to claim 31, wherein the script commands include commands to execute a function from a second application program.

46. An apparatus for scripting exported functionality of an application program, said apparatus comprising:

a memory for storing (a) an application program which includes an entry point for the exported functionality, (b) an initialization file that includes a dynamic link library list for the entry point, (c) a script interpreter which is responsive to a trigger event so as to trigger an attached script, and (d) a script which defines a script event by which the script is triggered and which includes script commands including commands to execute the exported functionality of the application program; and

a processor for instantiating the script interpreter, for attaching the script to the script interpreter, for indexing into the script interpreter a correlation list of attached scripts and script events by which the attached scripts are triggered, and for executing the application program so as to detect a trigger event and so as to provide the script interpreter with the detected trigger event;

wherein in response to a detected trigger event, said processor executes the script interpreter so as to interpret script commands in an attached script that corresponds to the trigger event listed in the index correlation list of attached scripts, whereby the exported functionality of the application program is executed based on the entry point listed in the dynamic link library.

47. An apparatus according to claim 46, wherein the initialization file includes entry points for utility functions, and wherein the attached script includes script commands to execute utility functions.

48. An apparatus according to claim 47, wherein the script interpreter refers to the initialization file in response to interpreting a script command to execute the utility function.

49. An apparatus according to claim 47, wherein the utility functions include a function to set a trigger event.

50. An apparatus according to claim 47, wherein the utility functions include a function to invoke another script.

51. An apparatus according to claim 47, wherein the utility functions include a function to determine whether an event is set.

52. An apparatus according to claim 46, wherein the initialization file includes entry points for a function exported from a second application program.

53. An apparatus according to claim 52, wherein the script interpreter refers to the initialization file in response to interpreting a script command to execute the function exported from the second application program.

54. An apparatus according to claim 46, wherein script commands include commands to execute utility functions.

55. An apparatus according to claim 54, wherein the utility functions include a function to set a trigger event.

56. An apparatus according to claim 54, wherein the utility functions includes a function to invoke another script.

57. An apparatus according to claim 54, wherein the utility functions include a function to determine whether an event is set.

58. An apparatus according to claim 46, wherein the script commands include commands to execute a function from a second application program.