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Instead, make fiber.lua call LL.atexit(fiber.run) to schedule that final run()
call at ~LuaState() time using the generic mechanism.
Append an explicit fiber.run() call to a specific test in llluamanager_test.cpp
because the test code wants to interact with multiple Lua fibers *before* we
destroy the LuaState.
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Make viewer_manifest.py copy them into the viewer install image.
Make the require() function look for them there.
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The expression (payload or {}) is unnecessary, since that value will be
converted to LLSD -- and both Lua nil and empty table convert to
LLSD::isUndefined().
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WIP: This is known not to work yet.
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The nullary login() call (login with saved credentials) has been tested, but
the binary login(username, password) call is known not to work yet.
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Add listviews(), viewinfo(), click(), doubleclick(), drag(), keypress() and
type().
WIP: These are ported from Python LEAP equivalents, but the Lua implementation
has only been partially tested.
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The 'startup' table, the module's namespace, must be defined near the top
because its local waitfor:process() override references startup.
The byname table's metatable's __index() function wants to raise an error if
you try to access an undefined entry, but it referenced t[k] to check that,
producing infinite recursion. Use rawget(t, k) instead.
Also use new leap.WaitFor(args) syntax instead of leap.WaitFor:new(args).
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The discussions we've read about Lua classes conventionally use
ClassName:new() as the constructor, and so far we've followed that convention.
But setting metaclass(ClassName).__call = ClassName.new permits Lua to respond
to calls of the form ClassName(ctor args) by implicitly calling
ClassName:new(ctor args).
Introduce util.classctor(). Calling util.classctor(ClassName) sets ClassName's
metaclass's __call to ClassName's constructor method. If the constructor method
is named something other than new(), pass ClassName.method as the second arg.
Use util.classctor() on each of our classes that defines a new() method.
Replace ClassName:new(args) calls with ClassName(args) calls throughout.
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in addition to a list {'name1', 'name2', ...}.
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There are two conventions for Lua function calls. You can call a function with
positional arguments as usual:
f(1, 2, 3)
Lua makes it easy to handle omitted positional arguments: their values are nil.
But as in C++, positional arguments get harder to read when there are many, or
when you want to omit arguments other than the last ones.
Alternatively, using Lua syntactic sugar, you can pass a single argument which
is a table containing the desired function arguments. For this you can use
table constructor syntax to effect keyword arguments:
f{a=1, b=2, c=3}
A call passing keyword arguments is more readable because you explicitly
associate the parameter name with each argument value. Moreover, it gracefully
handles the case of multiple optional arguments. The reader need not be
concerned about parameters *not* being passed.
Now you're coding a Lua module with a number of functions. Some have numerous
or complicated arguments; some do not. For simplicity, you code the simple
functions to accept positional arguments, the more complicated functions to
accept the single-table argument style.
But how the bleep is a consumer of your module supposed to remember which
calling style to use for a given function?
mapargs() blurs the distinction, accepting either style. Coding a function
like this (where '...' is literal code, not documentation ellipsis):
function f(...)
local args = mapargs({'a', 'b', 'c'}, ...)
-- now use args.a, args.b, args.c
end
supports calls like:
f(1, 2, 3)
f{1, 2, 3}
f{c=3, a=1, b=2}
f{1, 2, c=3}
f{c=3, 1, 2} -- unlike Python!
In every call above, args.a == 1, args.b == 2, args.c == 3.
Moreover, omitting arguments (or explicitly passing nil, positionally or by
keyword) works correctly.
test_mapargs.lua exercises these cases.
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so the user need not reverse-engineer the code to figure out the output.
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Since timers presents a timers.Timer Lua class supporting queries and
cancellation, make TimersListener::scheduleAfter() and scheduleEvery() respond
immediately so the newly constructed Timer object has the reqid necessary to
perform those subsequent operations.
This requires that Lua invocations of these operations avoid calling the
caller's callback with that initial response.
Reinvent leap.generate() to return a Lua object supporting next() and done()
methods. A plain Lua coroutine that (indirectly) calls fiber.wait() confuses
the fiber scheduler, so avoid implementing generate() as a Lua coroutine.
Add a bit more leap.lua diagnostic output.
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leap.eventstream() is used when we expect the viewer's LLEventAPI to send an
immediate first response with the reqid from the request, followed by some
number of subsequent responses bearing the same reqid. The difference between
eventstream() and generate() is that generate() expects the caller to request
each such response, whereas eventstream calls the caller's callback with each
response.
cancelreq() is for canceling the background fiber launched by eventstream()
before the callback tells it to quit.
Make WaitFor:close() remove the object from the waitfors list; similarly, make
WaitForReqid:close() remove the object from the pending list. For this reason,
cleanup() must iterate over a copy of each of the pending and waitfors lists.
Instead of unregisterWaitFor() manually searching the waitfors list, use
table.find().
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script
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Add test_luafloater_demo2.lua and test_luafloater_gesture_list2.lua examples.
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On Windows, std::filesystem::path::value_type is wchar_t, not char -- so
path::string_type is std::wstring, not std::string. So while Posix path
instances implicitly convert to string, Windows path instances do not. Add
explicit u8string() calls.
Also add LL.abspath() Lua entry point to further facilitate finding a resource
file relative to the calling Lua script. Use abspath() for both
test_luafloater_demo.lua and test_luafloater_gesture_list.lua.
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This lets a calling script verify that it's running at the right point in the
viewer's life cycle. A script that wants to interact with the SL agent
wouldn't work if run from the viewer's command line -- unless it calls
startup.wait("STATE_STARTED"), which pauses until login is complete.
Modify test_luafloater_demo.lua and test_luafloater_gesture_list.lua to find
their respective floater XUI files in the same directory as themselves.
Make them both capture the reqid returned by the "showLuaFloater" operation,
and filter for events bearing the same reqid. This paves the way for a given
script to display more than one floater concurrently.
Make test_luafloater_demo.lua (which does not require in-world resources) wait
until 'STATE_LOGIN_WAIT', the point at which the viewer has presented the
login screen.
Make test_luafloater_gesture_list.lua (which interacts with the agent) wait
until 'STATE_STARTED', the point at which the viewer is fully in world.
Either or both can now be launched from the viewer's command line.
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Earlier we had blithely designated the 'pending' list (which stores
WaitForReqid objects for pending request() and generate() calls) as a weak
table. But the caller of request() or generate() does not hold a reference to
the WaitForReqid object. Make pending hold "strong" references.
Private collections (pending, waitfors) and private scalars that are never
reassigned (reply, command) need not be entries in the leap table.
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Don't use "debug" as the name of a function to conditionally write debug
messages: "debug" is a Luau built-in library, and assigning that name locally
would shadow the builtin. Use "dbg" instead.
Recast fiber.print_all() as fiber.format_all() that returns a string; then
print_all() is simply print(format_all()). This refactoring allows us to use
dbg(format_all()) as well.
Add a couple new dbg() messages at fiber state changes.
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