 |
Free EcmaScript Interpreter.
A JavaScript interpreter written
in Java. |
Language extensions - BasicIO,
BasicIOw and BasicIOs |
BasicIO, BasicIOw and BasicIOs
One of the BasicIO, BasicIOw and BasicIOs
extension always loaded by the interactive interpreter program (but not
if the interpreter is started by a user program, in which case it may be
loaded if so desired). These extensions provide support for basic output
(to the standard output), basic error message display, user prompt,
file loading and program exit. The only difference is that the BasicIOw
and BasicIOs use windows for the alert, prompt
and confirm functions, while BasicIO just use the console.
BasicIOw is for use with AWT based programs, and BasicIOs
is for use with Swing based programs. Using the wrong version is likely
to cause various disasters, as AWT and Swing to not fit together
very well! When using the interactive interperter, BasicIOw
is loaded via the -w option, and BasicIOs via the -s
option.
The following global objects and routines are defined by BasicIO
and BasicIOw:
-
alert (message)
-
Write an [[alert]] message on the error stream.
-
confirm
-
Ask the user for a confirmation.
-
exit(status)
-
Exit with the specified status (uses System.exit(), so the program
is terminated!).
-
load (moduleName)
-
Locate the module in the directories and jar/zip files of the property
FESI.path or (if the property is not defined) in the classpath (possibly
adding the extension ".es", ".esw' or ".js"). Load the module and evaluate
its content at run-time.
-
prompt (query, [default])
-
Prompt the user for information, proposing the default string.
-
write(...)
-
Write the parameters to the current output stream.
-
writeln(...)
-
Write the parameters to the current output stream, followed by a new line.
-
document
-
An object for compatibility with JavaScript when expanding html files.
-
document.close()
-
Dummy routine for compatibility with JavaScript when expanding html files.
-
document.open()
-
Dummy routine for compatibility with JavaScript when expanding html files.
-
document.URL
-
Current file being processed (if defined by the interpreter).
-
document.write(...)
-
Same as write.
-
document.writeln(...)
-
Same as writeln.
-
window.alert (message)
-
Same as alert.
-
window.confirm
-
Same as confirm.
-
window.prompt (query [default])
-
Same as prompt.
The document and window objects are only used to ease
writing scripts which can be tested in a browser as well as with FESI.
They do not have any "window" or "document" functionality.
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Last update: 12 July 1998