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Add "userQuit" operation to LLAppViewerListener to engage
LLAppViewer::userQuit(), which pops up "Are you sure?" prompt unless
suppressed.
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Use ClassName(ctor args) for classes using util.classctor().
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popup:tip() engages 'SystemMessageTip'.
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The help string for each lua_function() must restate the function name and its
arguments. The help string is all that's shown; unless it restates the
function name, LL.help() output lists terse explanations for functions whose
names are not shown.
Make help() prepend "LL." to help output, because these functions must be
accessed via the "builtin" LL table instead of directly populating the global
Lua namespace.
Similarly, before string name lookup, remove "LL." prefix if specified.
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On Mac it doesn't seem to matter, but on Windows, leaving it uninitialized can
produce garbage results and even crash the coroutine. This seems strange,
since we've been assuming lua_getinfo() treats its lua_Debug* as output-only.
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We might decide to leave some of them in place.
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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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so cleanup happens in reverse order, as is conventional.
Streamline LL.atexit() function: luaL_newmetatable() performs all the
find-or-create named Registry table logic.
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lua_emplace<T>() was passing LL.atexit() a closure binding the new userdata
with a cleanup function. The trouble with that was that a strong reference to
the new userdata would prevent it ever being garbage collected, even if that
was the only remaining reference.
Instead, create a new weak table referencing the userdata, and bind that into
the cleanup function's closure. Then if the only remaining reference to the
userdata is from the weak table, the userdata can be collected.
Make lua_emplace_call_gc<T>() check the bound weak table in case the userdata
has in fact been collected.
Also, in lua_toclass<T>(), use luaL_checkudata() to synopsize comparing the
putative userdata's metatable against the one synthesized by lua_emplace<T>().
This saves several explicit steps.
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source_path() previously reported the path of the module containing the
current (lowest-level) Lua function. The effect was that the Floater.lua
module would always try to look up the XUI file relative to
scripts/lua/require.
It makes more intuitive sense to make source_path() return the path containing
the top-level script, so that a script engaging the Floater.lua module looks
for the XUI file relative to the script.
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Instead of deriving LuaListener from LLInstanceTracker with an int key,
generating a unique int key and storing that key in the Registry, use new
lua_emplace<LuaState>() to store the LuaListener directly in a Lua userdata
object in the Lua Registry.
Because lua_emplace<T>() uses LL.atexit() to guarantee that ~LuaState will
destroy the T object, we no longer need ~LuaState() to make a special call
specifically to destroy the LuaListener, if any. So we no longer need
LuaState::getListener() separate from obtainListener().
Since LuaListener is no longer an LLInstanceTracker subclass, make
LuaState::obtainListener() return LuaListener& rather than LuaListener::ptr_t.
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Publish new LL.atexit() function that accepts a Lua function (or C++ closure)
and saves it (in Registry["atexit"] table) to call later.
Make ~LuaState() walk the Registry["atexit"] table, if it exists, calling each
function appended to that table.
(Consider using that mechanism to clean up a LuaListener, if one was
instantiated. Possibly also use for p.s. leap.run()? But that's run after
every expr() call, instead of only at ~LuaState() time. Pragmatically, though,
the distinction only matters for a LUA Debug Console LUA string with "clean
lua_State" unchecked.)
For use by future lua_function() entry points, lua_emplace<T>(ctor args...)
pushes a Lua userdata object containing a newly-constructed T instance --
actually a std::optional<T> to avoid double destruction. lua_emplace<T>() is
specifically intended to be usable even for T with a nontrivial destructor: it
gives the userdata a metatable with a __gc function that destroys the
contained T instance when the userdata is garbage collected. But since garbage
collection doesn't guarantee to clean up global variables with __gc methods,
lua_emplace<T>() also uses LL.atexit() to ensure that ~T() will run when the
LuaState is destroyed.
The companion to lua_emplace<T>() is lua_toclass<T>(), which returns a
non-nullptr T* if the referenced index is in fact a userdata created by
lua_emplace<T>() for the same T, that has not yet been destroyed. This lets
C++ code access a T previously embedded in Lua userdata.
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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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We have log messages when a coroutine terminates abnormally, but we don't
report either when it starts or when it terminates normally. Address that.
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When the user explicitly types 'return expression[, expression]...' we convert
the result of the expressions to LLSD and format them into the LUA Debug
Console, which serves as a useful acknowledgment.
But until now, if the user neither invoked print() nor ran a 'return'
statement, the LUA Debug Console output remained empty. This could be a little
disconcerting: you click Execute, or press Enter, and apparently nothing
happens. You must either monitor viewer log output, or simply trust that the
Lua snippet ran.
When there are no 'return' results, at least emit 'ok'. But when the user is
entering a series of no-output commands, vary the 'ok' output by appending a
counter: 'ok 1', 'ok 2' etc.
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The special case of a Lua snippet that indirectly invokes the
"LLNotifications" listener can result in a recursive call to
LLFloaterLUADebug's handler methods. Defend against that case.
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It's helpful to see when expr() is actually going to start running a
particular Lua chunk. We already report not only when it's done, but also
if/when we start and finish a p.s. fiber.run() call.
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stringize() constructs, populates and destroys a std::ostringstream, which is
actually less efficient than directly allocating a std::string big enough for
the result of operator+().
Maybe someday we'll specialize stringize(p0, p1) for the case in which they're
both string-like, and invoke operator+() for that situation...
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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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