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authorcinap_lenrek <cinap_lenrek@localhost>2011-05-03 11:25:13 +0000
committercinap_lenrek <cinap_lenrek@localhost>2011-05-03 11:25:13 +0000
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+\chapter{MacPython OSA Modules \label{scripting}}
+
+This chapter describes the current implementation of the Open Scripting
+Architecure (OSA, also commonly referred to as AppleScript) for Python, allowing
+you to control scriptable applications from your Python program,
+and with a fairly pythonic interface. Development on this set of modules
+has stopped, and a replacement is expected for Python 2.5.
+
+For a description of the various components of AppleScript and OSA, and
+to get an understanding of the architecture and terminology, you should
+read Apple's documentation. The "Applescript Language Guide" explains
+the conceptual model and the terminology, and documents the standard
+suite. The "Open Scripting Architecture" document explains how to use
+OSA from an application programmers point of view. In the Apple Help
+Viewer these books are located in the Developer Documentation, Core
+Technologies section.
+
+
+As an example of scripting an application, the following piece of
+AppleScript will get the name of the frontmost \program{Finder} window
+and print it:
+
+\begin{verbatim}
+tell application "Finder"
+ get name of window 1
+end tell
+\end{verbatim}
+
+In Python, the following code fragment will do the same:
+
+\begin{verbatim}
+import Finder
+
+f = Finder.Finder()
+print f.get(f.window(1).name)
+\end{verbatim}
+
+As distributed the Python library includes packages that implement the
+standard suites, plus packages that interface to a small number of
+common applications.
+
+To send AppleEvents to an application you must first create the Python
+package interfacing to the terminology of the application (what
+\program{Script Editor} calls the "Dictionary"). This can be done from
+within the \program{PythonIDE} or by running the
+\file{gensuitemodule.py} module as a standalone program from the command
+line.
+
+The generated output is a package with a number of modules, one for
+every suite used in the program plus an \module{__init__} module to glue
+it all together. The Python inheritance graph follows the AppleScript
+inheritance graph, so if a program's dictionary specifies that it
+includes support for the Standard Suite, but extends one or two verbs
+with extra arguments then the output suite will contain a module
+\module{Standard_Suite} that imports and re-exports everything from
+\module{StdSuites.Standard_Suite} but overrides the methods that have
+extra functionality. The output of \module{gensuitemodule} is pretty
+readable, and contains the documentation that was in the original
+AppleScript dictionary in Python docstrings, so reading it is a good
+source of documentation.
+
+The output package implements a main class with the same name as the
+package which contains all the AppleScript verbs as methods, with the
+direct object as the first argument and all optional parameters as
+keyword arguments. AppleScript classes are also implemented as Python
+classes, as are comparisons and all the other thingies.
+
+The main
+Python class implementing the verbs also allows access to the properties
+and elements declared in the AppleScript class "application". In the
+current release that is as far as the object orientation goes, so
+in the example above we need to use
+\code{f.get(f.window(1).name)} instead of the more Pythonic
+\code{f.window(1).name.get()}.
+
+
+If an AppleScript identifier is not a Python identifier the name is
+mangled according to a small number of rules:
+\begin{itemize}
+ \item spaces are replaced with underscores
+ \item other non-alphanumeric characters are replaced with
+ \code{_xx_} where \code{xx} is the hexadecimal character value
+ \item any Python reserved word gets an underscore appended
+\end{itemize}
+
+Python also has support for creating scriptable applications
+in Python, but
+The following modules are relevant to MacPython AppleScript support:
+
+\localmoduletable
+
+In addition, support modules have been pre-generated for
+\module{Finder}, \module{Terminal}, \module{Explorer},
+\module{Netscape}, \module{CodeWarrior}, \module{SystemEvents} and
+\module{StdSuites}.
+
+\input{libgensuitemodule}
+\input{libaetools}
+\input{libaepack}
+\input{libaetypes}
+\input{libminiae}