I have today added/finished two simple features that are
interesting for development of Nasal code.
(A) Help->Nasal Console
This dialog supports now several tabs, of which each can hold
separate Nasal code snippets, all of which are saved on exit
and reloaded next time. This is useful for little tests, or for
executing code for which writing a key binding is just too much
work, such as "props.dump(props.globals)". It's easy to add more
"tabs" (= radio buttons). One just needs to add more <code> nodes
to autosave.xml.
(B) (re)loading Nasal modules at runtime
There's a new function debug.load_xml_nasal(), which loads an XML
file with embedded Nasal into a nasal namespace. For syntax
coloring reasons one may want to use a *.nas extension for this file.
Example:
$ cat $FG_ROOT/Aircraft/foo/test.nas
<PropertyList><script><![CDATA[
# --------------------------------------------------------------
print("hi!");
var hello = func { print("I'm the test.hello() function") }
# --------------------------------------------------------------
]]></script></PropertyList>
$
One can now edit this file and import the code into fgfs with
this line in a key binding or typed into the Nasal Console dialog:
debug.load_xml_nasal("Aircraft/foo/test.nas");
This will load the Nasal code from Aircraft/foo/test.nas
into namespace "test" and execute it, so you'll see the message
"hi!" on the terminal, and have function "test.hello()" immediately
available. You can at runtime change the Nasal file, and import
again, etc. And once you are happy with the code, just remove the
two XML lines and load the file via classical method.
The namespace, to which the code is loaded, is determined from the
file name. foo.nas or foo.xml will be added to namespace "foo".
The namespace gets created if it didn't exist. Alternatively, one
can define a namespace in the file by addind a <module> name:
<PropertyList><module>whatever</module><script><![CDATA[
...
]]></script></PropertyList>
m.
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