roblox_emulator/src/context.rs

94 lines
2.8 KiB
Rust

use rbx_dom_weak::{types::Ref,InstanceBuilder,WeakDom};
pub fn class_is_a(class:&str,superclass:&str)->bool{
class==superclass
||rbx_reflection_database::get().classes.get(class)
.is_some_and(|descriptor|
descriptor.superclass.as_ref().is_some_and(|class_super|
class_is_a(class_super,superclass)
)
)
}
#[repr(transparent)]
pub struct Context{
pub(crate)dom:WeakDom,
}
impl Context{
pub const fn new(dom:WeakDom)->Self{
Self{dom}
}
pub fn script_singleton(source:String)->(Context,crate::runner::instance::Instance,Services){
let script=InstanceBuilder::new("Script")
.with_property("Source",rbx_types::Variant::String(source));
let script_ref=script.referent();
let mut context=Self::new(WeakDom::new(
InstanceBuilder::new("DataModel")
.with_child(script)
));
let services=context.convert_into_place();
(context,crate::runner::instance::Instance::new(script_ref),services)
}
pub fn from_ref(dom:&WeakDom)->&Context{
unsafe{&*(dom as *const WeakDom as *const Context)}
}
pub fn from_mut(dom:&mut WeakDom)->&mut Context{
unsafe{&mut *(dom as *mut WeakDom as *mut Context)}
}
/// Creates an iterator over all items of a particular class.
pub fn superclass_iter<'a>(&'a self,superclass:&'a str)->impl Iterator<Item=Ref>+'a{
self.dom.descendants().filter(|&instance|
class_is_a(instance.class.as_ref(),superclass)
).map(|instance|instance.referent())
}
pub fn scripts(&self)->Vec<crate::runner::instance::Instance>{
self.superclass_iter("LuaSourceContainer").map(crate::runner::instance::Instance::new).collect()
}
pub fn find_services(&self)->Option<Services>{
Some(Services{
workspace:*self.dom.root().children().iter().find(|&&r|
self.dom.get_by_ref(r).is_some_and(|instance|instance.class=="Workspace")
)?,
game:self.dom.root_ref(),
})
}
pub fn convert_into_place(&mut self)->Services{
//snapshot root instances
let children=self.dom.root().children().to_owned();
//insert services
let game=self.dom.root_ref();
let terrain_bldr=InstanceBuilder::new("Terrain");
let workspace=self.dom.insert(game,
InstanceBuilder::new("Workspace")
//Set Workspace.Terrain property equal to Terrain
.with_property("Terrain",terrain_bldr.referent())
.with_child(terrain_bldr)
);
{
//Lowercase and upper case workspace property!
let game=self.dom.root_mut();
game.properties.insert("workspace".to_owned(),rbx_types::Variant::Ref(workspace));
game.properties.insert("Workspace".to_owned(),rbx_types::Variant::Ref(workspace));
}
self.dom.insert(game,InstanceBuilder::new("Lighting"));
//transfer original root instances into workspace
for instance in children{
self.dom.transfer_within(instance,workspace);
}
Services{
game,
workspace,
}
}
}
pub struct Services{
pub game:Ref,
pub workspace:Ref,
}