297 lines
8.5 KiB
Rust
297 lines
8.5 KiB
Rust
use crate::avm1::activation::{
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Activation as Avm1Activation, ActivationIdentifier as Avm1ActivationIdentifier,
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};
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use crate::avm1::object::TObject;
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use crate::avm1::Value as Avm1Value;
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use crate::avm1::{
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ArrayObject as Avm1ArrayObject, AvmString as Avm1String, Error as Avm1Error,
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Object as Avm1Object, ScriptObject as Avm1ScriptObject,
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};
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use crate::context::UpdateContext;
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use gc_arena::Collect;
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use std::collections::BTreeMap;
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/// An intermediate format of representing shared data between ActionScript and elsewhere.
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/// Regardless of the capabilities of both sides, all data will be translated to this potentially
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/// lossy format. Any recursion or additional metadata in ActionScript will not be translated.
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#[derive(Debug, Clone, PartialEq)]
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pub enum Value {
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Null,
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Bool(bool),
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Number(f64),
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String(String),
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Object(BTreeMap<String, Value>),
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List(Vec<Value>),
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}
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impl From<Avm1String<'_>> for Value {
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fn from(string: Avm1String<'_>) -> Self {
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Value::String(string.to_string())
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}
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}
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impl From<String> for Value {
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fn from(string: String) -> Self {
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Value::String(string)
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}
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}
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impl From<&'static str> for Value {
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fn from(string: &'static str) -> Self {
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Value::String(string.into())
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}
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}
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impl From<bool> for Value {
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fn from(value: bool) -> Self {
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Value::Bool(value)
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}
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}
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impl From<f64> for Value {
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fn from(value: f64) -> Self {
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Value::Number(value)
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}
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}
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impl From<f32> for Value {
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fn from(value: f32) -> Self {
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Value::Number(f64::from(value))
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}
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}
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impl From<u8> for Value {
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fn from(value: u8) -> Self {
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Value::Number(f64::from(value))
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}
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}
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impl From<i16> for Value {
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fn from(value: i16) -> Self {
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Value::Number(f64::from(value))
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}
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}
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impl From<u16> for Value {
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fn from(value: u16) -> Self {
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Value::Number(f64::from(value))
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}
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}
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impl From<i32> for Value {
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fn from(value: i32) -> Self {
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Value::Number(f64::from(value))
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}
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}
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impl From<i64> for Value {
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fn from(value: i64) -> Self {
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Value::Number(value as f64)
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}
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}
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impl From<u32> for Value {
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fn from(value: u32) -> Self {
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Value::Number(f64::from(value))
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}
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}
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impl From<usize> for Value {
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fn from(value: usize) -> Self {
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Value::Number(value as f64)
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}
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}
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impl From<BTreeMap<String, Value>> for Value {
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fn from(value: BTreeMap<String, Value>) -> Self {
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Value::Object(value)
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}
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}
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impl From<Vec<Value>> for Value {
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fn from(value: Vec<Value>) -> Self {
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Value::List(value)
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}
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}
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impl Value {
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pub fn from_avm1<'gc>(
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activation: &mut Avm1Activation<'_, 'gc, '_>,
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value: Avm1Value<'gc>,
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) -> Result<Value, Avm1Error<'gc>> {
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Ok(match value {
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Avm1Value::Undefined | Avm1Value::Null => Value::Null,
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Avm1Value::Bool(value) => value.into(),
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Avm1Value::Number(value) => value.into(),
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Avm1Value::String(value) => Value::String(value.to_string()),
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Avm1Value::Object(object) => {
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if object.as_array_object().is_some() {
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let length = object.length(activation)?;
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let values: Result<Vec<_>, Avm1Error<'gc>> = (0..length)
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.map(|i| {
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let element = object.get_element(activation, i);
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Value::from_avm1(activation, element)
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})
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.collect();
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Value::List(values?)
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} else {
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let keys = object.get_keys(activation);
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let mut values = BTreeMap::new();
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for key in keys {
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let value = object.get(&key, activation)?;
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values.insert(key, Value::from_avm1(activation, value)?);
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}
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Value::Object(values)
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}
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}
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})
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}
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pub fn into_avm1<'gc>(self, activation: &mut Avm1Activation<'_, 'gc, '_>) -> Avm1Value<'gc> {
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match self {
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Value::Null => Avm1Value::Null,
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Value::Bool(value) => Avm1Value::Bool(value),
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Value::Number(value) => Avm1Value::Number(value),
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Value::String(value) => {
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Avm1Value::String(Avm1String::new(activation.context.gc_context, value))
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}
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Value::Object(values) => {
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let object = Avm1ScriptObject::object(
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activation.context.gc_context,
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Some(activation.context.avm1.prototypes().object),
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);
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for (key, value) in values {
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let _ = object.set(&key, value.into_avm1(activation), activation);
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}
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object.into()
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}
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Value::List(values) => Avm1ArrayObject::new(
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activation.context.gc_context,
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activation.context.avm1.prototypes().array,
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values
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.iter()
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.map(|value| value.to_owned().into_avm1(activation)),
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)
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.into(),
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}
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}
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}
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#[derive(Collect, Clone)]
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#[collect(no_drop)]
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pub enum Callback<'gc> {
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Avm1 {
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this: Avm1Value<'gc>,
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method: Avm1Object<'gc>,
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},
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}
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impl<'gc> Callback<'gc> {
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pub fn call(
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&self,
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context: &mut UpdateContext<'_, 'gc, '_>,
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name: &str,
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args: impl IntoIterator<Item = Value>,
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) -> Value {
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match self {
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Callback::Avm1 { this, method } => {
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let base_clip = context.stage.root_clip();
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let swf_version = context.swf.version();
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let globals = context.avm1.global_object_cell();
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let mut activation = Avm1Activation::from_nothing(
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context.reborrow(),
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Avm1ActivationIdentifier::root("[ExternalInterface]"),
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swf_version,
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globals,
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base_clip,
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);
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let this = this.coerce_to_object(&mut activation);
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let args: Vec<Avm1Value> = args
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.into_iter()
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.map(|v| v.into_avm1(&mut activation))
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.collect();
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if let Ok(result) = method
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.call(name, &mut activation, this, None, &args)
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.and_then(|value| Value::from_avm1(&mut activation, value))
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{
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result
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} else {
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Value::Null
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}
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}
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}
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}
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}
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pub trait ExternalInterfaceProvider {
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fn get_method(&self, name: &str) -> Option<Box<dyn ExternalInterfaceMethod>>;
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fn on_callback_available(&self, name: &str);
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fn on_fs_command(&self, command: &str, args: &str) -> bool;
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}
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pub trait ExternalInterfaceMethod {
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fn call(&self, context: &mut UpdateContext<'_, '_, '_>, args: &[Value]) -> Value;
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}
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impl<F> ExternalInterfaceMethod for F
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where
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F: Fn(&mut UpdateContext<'_, '_, '_>, &[Value]) -> Value,
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{
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fn call(&self, context: &mut UpdateContext<'_, '_, '_>, args: &[Value]) -> Value {
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self(context, args)
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}
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}
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#[derive(Default, Collect)]
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#[collect(no_drop)]
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pub struct ExternalInterface<'gc> {
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#[collect(require_static)]
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providers: Vec<Box<dyn ExternalInterfaceProvider>>,
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callbacks: BTreeMap<String, Callback<'gc>>,
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}
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impl<'gc> ExternalInterface<'gc> {
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pub fn new() -> Self {
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Self::default()
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}
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pub fn add_provider(&mut self, provider: Box<dyn ExternalInterfaceProvider>) {
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self.providers.push(provider);
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}
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pub fn add_callback(&mut self, name: String, callback: Callback<'gc>) {
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self.callbacks.insert(name.clone(), callback);
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for provider in &self.providers {
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provider.on_callback_available(&name);
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}
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}
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pub fn get_callback(&self, name: &str) -> Option<Callback<'gc>> {
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self.callbacks.get(name).cloned()
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}
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pub fn get_method_for(&self, name: &str) -> Option<Box<dyn ExternalInterfaceMethod>> {
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for provider in &self.providers {
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if let Some(method) = provider.get_method(name) {
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return Some(method);
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}
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}
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None
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}
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pub fn available(&self) -> bool {
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!self.providers.is_empty()
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}
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pub fn invoke_fs_command(&self, command: &str, args: &str) -> bool {
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for provider in &self.providers {
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if provider.on_fs_command(command, args) {
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return true;
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}
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}
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false
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}
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}
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