mirror of
https://github.com/pjh456/OxideJS.git
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166 lines
7.4 KiB
Rust
166 lines
7.4 KiB
Rust
//! Event 基类绑定：就地填充 `event_constructor` / `event_proto` 两枚 P 字段
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//! 占位（构造器本体、原型方法、原型 getter 与 Event 常量），并绑全局 `Event`。
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//!
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//! 九枚 P 字段中其余七枚（MessageEvent / ErrorEvent / CustomEvent 四对加
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//! EventTarget 原型）由后续子任务就地填充，本函数不读不写。
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use std::sync::Arc;
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use crate::bind_constructor;
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use crate::bindings::{apply_binding_table, bind_accessor_getter, configure_native_constructor};
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use oxide_kernel::kernel::{KernelCore, KernelSession};
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use oxide_types::object::{JsObject, PropAttributes};
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use oxide_types::value::JsValue;
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/// 把 Event 构造器与原型方法绑定到 global。
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///
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/// `event_constructor` / `event_proto` 两枚 P 字段是空对象占位，本函数就地
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/// 填充（不新建对象——P 字段本身就是槽位，快照/脏检查/收尾枚举已覆盖）。
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///
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/// # 幂等
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/// 本函数从三条路径到达：`init_kernel_builtins`（占位是空对象）、
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/// `rebind_dirty_builtins` 的 `event` 分支（占位是重建后的空对象）、global-dirty
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/// 路径（占位可能已填满）。全部槽写经 `lookup_position` 前置守卫，有槽即跳过；
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/// `bind_constructor!` 的全局槽臂自带既有槽原位更新，天然幂等。
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///
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/// `realm_id` 未使用（Event 无 well-known 符号键），保留签名与其他绑定函数一致。
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pub fn bind_event(core: &Arc<KernelCore>, session: &KernelSession, global: &mut JsObject, _realm_id: u32) {
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let world = session.builtin_world();
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let ctor_ptr = world.event_constructor.as_ptr() as *mut JsObject;
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let ctor = unsafe { &mut *ctor_ptr };
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let proto_ptr = world.event_proto.as_ptr() as *mut JsObject;
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let proto = unsafe { &mut *proto_ptr };
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let sf = core.perm_interner().as_ref();
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let sh = core.shape_forge().as_ref();
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// ---- 填构造器占位 ----
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ctor.set_function(true);
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// prototype 槽 → 原型对象（描述符 {f,f,f}）。
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let si_prototype = sf.intern("prototype").0;
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if sh.lookup_position(ctor.shape_id(), si_prototype).is_none() {
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let shape = sh.make_shape(ctor.shape_id(), si_prototype);
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ctor.set_shape_id(shape);
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let pos = ctor.push_prop(JsValue::from_js_object(proto_ptr));
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ctor.set_data_meta(pos, PropAttributes::new(false, false, false));
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ctor.bump_generation();
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}
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// name 槽 → "Event"（描述符 {f,f,t}）。
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let si_name = sf.intern("name").0;
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if sh.lookup_position(ctor.shape_id(), si_name).is_none() {
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let shape = sh.make_shape(ctor.shape_id(), si_name);
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ctor.set_shape_id(shape);
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ctor.ensure_hash_props()
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.push(JsValue::perm_string(sf.string_ptr(sf.intern("Event").0)));
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let pos = ctor.hash_props_vec().map_or(0, |v| v.len() as u32).saturating_sub(1);
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ctor.set_data_meta(pos, PropAttributes::new(false, false, true));
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ctor.bump_generation();
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}
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// [[Prototype]] → Function.prototype（幂等，裸写槽）。
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let fn_proto_val = JsValue::from_js_object(world.function_proto.as_ptr() as *mut JsObject);
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let _ = ctor.set_proto(fn_proto_val);
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configure_native_constructor(ctor, oxide_builtins::event::event_constructor::<crate::vm::Vm> as *const (), 2);
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bind_constructor!(
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core,
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global,
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"Event",
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ctor_ptr,
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oxide_builtins::event::event_constructor::<crate::vm::Vm>,
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2,
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hash: true
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);
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// Event 常量：CAPTURING_PHASE / AT_TARGET / BUBBLING_PHASE（绑构造器，
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// 描述符 {t,f,t}）。
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let constants: [(&str, i32); 3] = [("CAPTURING_PHASE", 1), ("AT_TARGET", 2), ("BUBBLING_PHASE", 3)];
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for (name, value) in constants {
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let si = sf.intern(name).0;
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if sh.lookup_position(ctor.shape_id(), si).is_none() {
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let shape = sh.make_shape(ctor.shape_id(), si);
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ctor.set_shape_id(shape);
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let pos = ctor.push_prop(JsValue::int(value));
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ctor.set_data_meta(pos, PropAttributes::new(true, false, true));
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ctor.bump_generation();
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}
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}
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// ---- 填原型占位 ----
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// constructor 槽 → 构造器对象（描述符 {t,f,t}）。
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let si_constructor = sf.intern("constructor").0;
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if sh.lookup_position(proto.shape_id(), si_constructor).is_none() {
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let shape = sh.make_shape(proto.shape_id(), si_constructor);
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proto.set_shape_id(shape);
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let pos = proto.push_prop(JsValue::from_js_object(ctor_ptr));
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proto.set_data_meta(pos, PropAttributes::new(true, false, true));
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proto.bump_generation();
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}
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// [[Prototype]] → Object.prototype（幂等，裸写槽）。
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let object_proto_val = JsValue::from_js_object(world.object_proto.as_ptr() as *mut JsObject);
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let _ = proto.set_proto(object_proto_val);
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// 原型方法：preventDefault / stopPropagation / stopImmediatePropagation /
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// composedPath（每方法先 lookup_position 守卫）。
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let si_prevent_default = sf.intern("preventDefault").0;
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if sh.lookup_position(proto.shape_id(), si_prevent_default).is_none() {
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apply_binding_table(
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world,
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proto,
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core,
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&[
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(
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"preventDefault",
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oxide_builtins::event::event_prevent_default::<crate::vm::Vm> as *const (),
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0,
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),
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(
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"stopPropagation",
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oxide_builtins::event::event_stop_propagation::<crate::vm::Vm> as *const (),
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0,
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),
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(
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"stopImmediatePropagation",
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oxide_builtins::event::event_stop_immediate_propagation::<crate::vm::Vm> as *const (),
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0,
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),
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(
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"composedPath",
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oxide_builtins::event::event_composed_path::<crate::vm::Vm> as *const (),
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0,
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),
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],
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);
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}
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// 原型 getter：type / target / currentTarget / eventPhase / isTrusted /
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// bubbles / cancelable / defaultPrevented / composed（每 getter 先
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// lookup_position 守卫）。
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let getter_fns: [(&str, *const ()); 9] = [
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("type", oxide_builtins::event::event_type_getter::<crate::vm::Vm> as *const ()),
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("target", oxide_builtins::event::event_target_getter::<crate::vm::Vm> as *const ()),
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(
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"currentTarget",
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oxide_builtins::event::event_current_target_getter::<crate::vm::Vm> as *const (),
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),
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("eventPhase", oxide_builtins::event::event_phase_getter::<crate::vm::Vm> as *const ()),
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("isTrusted", oxide_builtins::event::event_is_trusted_getter::<crate::vm::Vm> as *const ()),
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("bubbles", oxide_builtins::event::event_bubbles_getter::<crate::vm::Vm> as *const ()),
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("cancelable", oxide_builtins::event::event_cancelable_getter::<crate::vm::Vm> as *const ()),
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(
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"defaultPrevented",
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oxide_builtins::event::event_default_prevented_getter::<crate::vm::Vm> as *const (),
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),
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("composed", oxide_builtins::event::event_composed_getter::<crate::vm::Vm> as *const ()),
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];
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for (name, fn_ptr) in getter_fns {
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let si = sf.intern(name).0;
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if sh.lookup_position(proto.shape_id(), si).is_none() {
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bind_accessor_getter(core, session, proto, name, fn_ptr);
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}
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}
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}
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