avm2: Implement base types for array-shaped objects.
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@ -23,6 +23,7 @@ macro_rules! avm_debug {
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}
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mod activation;
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mod array;
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mod class;
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mod function;
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mod globals;
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@ -0,0 +1,88 @@
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//! Array support types
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use crate::avm2::activation::Activation;
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use crate::avm2::names::QName;
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use crate::avm2::object::{Object, TObject};
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use crate::avm2::string::AvmString;
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use crate::avm2::value::Value;
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use crate::avm2::Error;
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use gc_arena::Collect;
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/// The array storage portion of an array object.
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///
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/// Array values may consist of either standard `Value`s or "holes": values
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/// which are not properties of the associated object and must be resolved in
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/// the prototype.
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#[derive(Clone, Collect, Debug)]
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#[collect(no_drop)]
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pub struct ArrayStorage<'gc> {
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storage: Vec<Option<Value<'gc>>>,
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}
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impl<'gc> ArrayStorage<'gc> {
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/// Construct new array storage.
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///
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/// The length parameter indicates how big the array storage should start
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/// out as. All array storage consists of holes.
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pub fn new(length: usize) -> Self {
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let mut storage = Vec::new();
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storage.resize(length, None);
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Self { storage }
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}
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/// Retrieve a value from array storage by index.
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///
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/// Array holes will be resolved on the prototype. No reference to
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/// class traits will be made.
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fn get(
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&self,
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item: usize,
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proto: Option<Object<'gc>>,
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activation: &mut Activation<'_, 'gc, '_>,
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) -> Result<Value<'gc>, Error> {
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Ok(self
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.storage
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.get(item)
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.cloned()
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.unwrap_or(None)
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.map(Ok)
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.unwrap_or_else(|| {
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if let Some(mut proto) = proto {
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proto.get_property(
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proto,
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&QName::dynamic_name(AvmString::new(
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activation.context.gc_context,
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format!("{}", item),
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)),
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activation,
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)
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} else {
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Ok(Value::Undefined)
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}
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})?)
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}
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/// Set an array storage slot to a particular value.
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///
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/// If the item index extends beyond the length of the array, then the
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/// array will be extended with holes.
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fn set(&mut self, item: usize, value: Value<'gc>) {
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if self.storage.len() < (item + 1) {
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self.storage.resize(item + 1, None)
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}
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*self.storage.get_mut(item).unwrap() = Some(value)
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}
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/// Get the length of the array.
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fn length(&self) -> usize {
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self.storage.len()
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}
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/// Set the length of the array.
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fn set_length(&mut self, size: usize) {
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self.storage.resize(size, None)
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}
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}
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@ -1,6 +1,7 @@
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//! AVM2 objects.
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use crate::avm2::activation::Activation;
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use crate::avm2::array::ArrayStorage;
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use crate::avm2::class::Class;
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use crate::avm2::function::Executable;
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use crate::avm2::names::{Multiname, Namespace, QName};
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@ -14,12 +15,14 @@ use ruffle_macros::enum_trait_object;
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use std::cell::Ref;
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use std::fmt::Debug;
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mod array_object;
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mod custom_object;
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mod function_object;
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mod namespace_object;
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mod primitive_object;
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mod script_object;
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pub use crate::avm2::object::array_object::ArrayObject;
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pub use crate::avm2::object::function_object::FunctionObject;
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pub use crate::avm2::object::namespace_object::NamespaceObject;
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pub use crate::avm2::object::primitive_object::PrimitiveObject;
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@ -35,6 +38,7 @@ pub use crate::avm2::object::script_object::ScriptObject;
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FunctionObject(FunctionObject<'gc>),
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PrimitiveObject(PrimitiveObject<'gc>),
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NamespaceObject(NamespaceObject<'gc>),
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ArrayObject(ArrayObject<'gc>),
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}
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)]
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pub trait TObject<'gc>: 'gc + Collect + Debug + Into<Object<'gc>> + Clone + Copy {
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@ -735,6 +739,11 @@ pub trait TObject<'gc>: 'gc + Collect + Debug + Into<Object<'gc>> + Clone + Copy
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fn as_namespace(&self) -> Option<Ref<Namespace<'gc>>> {
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None
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}
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/// Unwrap this object as array storage.
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fn as_array_storage(&self) -> Option<Ref<ArrayStorage<'gc>>> {
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None
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}
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}
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pub enum ObjectPtr {}
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@ -0,0 +1,87 @@
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//! Array-structured objects
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use crate::avm1::AvmString;
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use crate::avm2::activation::Activation;
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use crate::avm2::array::ArrayStorage;
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use crate::avm2::class::Class;
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use crate::avm2::names::{Namespace, QName};
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use crate::avm2::object::script_object::{ScriptObjectClass, ScriptObjectData};
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use crate::avm2::object::{Object, ObjectPtr, TObject};
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use crate::avm2::scope::Scope;
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use crate::avm2::traits::Trait;
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use crate::avm2::value::Value;
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use crate::avm2::Error;
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use crate::impl_avm2_custom_object;
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use gc_arena::{Collect, GcCell, MutationContext};
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use std::cell::Ref;
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/// An Object which stores numerical properties in an array.
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#[derive(Collect, Debug, Clone, Copy)]
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#[collect(no_drop)]
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pub struct ArrayObject<'gc>(GcCell<'gc, ArrayObjectData<'gc>>);
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#[derive(Collect, Debug, Clone)]
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#[collect(no_drop)]
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pub struct ArrayObjectData<'gc> {
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/// Base script object
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base: ScriptObjectData<'gc>,
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/// Array-structured properties
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array: ArrayStorage<'gc>,
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}
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impl<'gc> TObject<'gc> for ArrayObject<'gc> {
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impl_avm2_custom_object!(base);
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fn to_string(&self, _mc: MutationContext<'gc, '_>) -> Result<Value<'gc>, Error> {
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Ok("function Function() {}".into())
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}
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fn value_of(&self, _mc: MutationContext<'gc, '_>) -> Result<Value<'gc>, Error> {
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Ok(Value::Object(Object::from(*self)))
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}
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fn as_array_storage(&self) -> Option<Ref<ArrayStorage<'gc>>> {
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Some(Ref::map(self.0.read(), |aod| &aod.array))
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}
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fn construct(
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&self,
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activation: &mut Activation<'_, 'gc, '_>,
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_args: &[Value<'gc>],
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) -> Result<Object<'gc>, Error> {
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let this: Object<'gc> = Object::ArrayObject(*self);
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let base = ScriptObjectData::base_new(Some(this), ScriptObjectClass::NoClass);
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Ok(ArrayObject(GcCell::allocate(
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activation.context.gc_context,
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ArrayObjectData {
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base,
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array: ArrayStorage::new(0),
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},
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))
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.into())
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}
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fn derive(
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&self,
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activation: &mut Activation<'_, 'gc, '_>,
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class: GcCell<'gc, Class<'gc>>,
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scope: Option<GcCell<'gc, Scope<'gc>>>,
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) -> Result<Object<'gc>, Error> {
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let this: Object<'gc> = Object::ArrayObject(*self);
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let base = ScriptObjectData::base_new(
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Some(this),
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ScriptObjectClass::InstancePrototype(class, scope),
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);
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Ok(ArrayObject(GcCell::allocate(
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activation.context.gc_context,
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ArrayObjectData {
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base,
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array: ArrayStorage::new(0),
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},
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))
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.into())
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}
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}
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