544 lines
22 KiB
Rust
544 lines
22 KiB
Rust
//! 托管 Window 的页面所有权、原生命令与关闭生命周期。
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//! 源码 resize/focus/setTitle 先产生纯数据命令；只有所属输入成功发布后，GUI 线程才应用它们。
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//! 窗口 ID 和运行时 session 共同限定资源归属；切换 VM 或关闭窗口时不能让旧命令作用到新资源。
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//!
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//! Managed window resources and versioned, coalesced native projections.
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//! The VM owns Page roots; only scalar commands cross to the GUI thread.
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use crate::{native_visual, object_list, ui_bridge::desktop_type};
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use endor_core::{
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ContextNativeFunction, NativeCallable, NativeContext, NativeResult, ObjectPayload, ObjectRef,
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ObjectStore, Value, Vm, VmError,
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};
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use std::sync::{Arc, Mutex};
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pub const MAIN_WINDOW: u64 = 1;
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pub const MAX_WINDOW_DIMENSION: f64 = 4096.0;
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#[derive(Debug, Clone, PartialEq)]
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/// 可投影到原生窗口的动作类别，如尺寸、标题、焦点与关闭。
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pub enum Action {
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Resize { width: f64, height: f64 },
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SetTitle(String),
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MoveTo { x: i32, y: i32 },
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Focus,
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Close,
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}
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#[derive(Debug, Clone, PartialEq)]
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/// 成功发布后由 GUI 执行的一条原生窗口请求，含资源身份和动作顺序。
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pub struct Command {
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pub window: u64,
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pub sequence: u64,
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pub action: Action,
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}
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impl Command {
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/// 判断两条命令是否针对同一资源的同类动作，用于替换尚未执行的旧请求。
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pub fn same_kind(&self, other: &Self) -> bool {
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// 比较动作变体而不是参数值：同窗口多次 Resize/SetTitle 可合并为最后一次，不同动作仍按序保留。
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self.window == other.window
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&& std::mem::discriminant(&self.action) == std::mem::discriminant(&other.action)
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}
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}
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#[derive(Debug, Clone)]
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/// 附带运行时 session 的命令，阻止旧域请求在新 VM 上生效。
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pub struct Envelope {
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pub session: u64,
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pub command: Command,
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}
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#[derive(Debug, Clone)]
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/// 托管窗口资源状态与页面拥有关系；本对象存在不等于 OS 窗口已创建。
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pub struct ManagedWindow {
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pub id: u64,
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// 每窗口拥有独立 desktop、tabs 与页面顺序；同 VM 的类型注册表可共享，不复制业务模型。
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pub desktop: ObjectRef,
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pub closed: bool,
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pub tasks: Option<ObjectRef>,
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tabs: ObjectRef,
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// 页面身份的有序强拥有集合，tabs 字典同时提供托管注册入口；移动顺序只调整此 Vec。
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pages: Vec<ObjectRef>,
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sequence: u64,
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// Transport state only. Draining it must not change a language object's
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// version or create a render-dependency feedback loop.
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// 仅保存纯数据传输队列，克隆 payload 仍共享同一 outbox；drain 不触发 VM 内容版本，避免反馈循环。
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outbox: Arc<Mutex<Vec<Command>>>,
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}
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impl ObjectPayload for ManagedWindow {
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/// 提供受检查的 Any 下转型入口，让宿主按具体 payload 类型读取数据。
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fn as_any(&self) -> &dyn std::any::Any {
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self
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}
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/// 返回运行时诊断/类型检查使用的稳定 payload 名称。
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fn kind_name(&self) -> &'static str {
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"tessera-window"
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}
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/// 声明此 payload 是否允许使用托管属性存储，具体字段仍由类型与调用检查约束。
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fn allows_attributes(&self) -> bool {
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true
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}
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/// 声明此 payload 的赋值遵循引用身份语义，避免把内部宿主状态当作可复制值。
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fn reference_assignment_only(&self) -> bool {
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true
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}
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/// 枚举本对象真正拥有的托管强引用，供 Aster 引用追踪和循环回收使用。
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fn trace(&self, visit: &mut dyn FnMut(ObjectRef)) {
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visit(self.desktop);
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if let Some(tasks) = self.tasks {
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visit(tasks);
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}
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visit(self.tabs);
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for page in &self.pages {
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visit(*page);
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}
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}
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}
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/// 统一构造本模块的参数错误，让调用方停止处理无效输入。
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fn invalid(message: &'static str) -> VmError {
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VmError::InvalidArgument(message)
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}
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/// 把源数值转换为有限屏幕坐标，拒绝越界或不可表示的值。
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fn screen_coordinate(value: &Value) -> Result<i32, VmError> {
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let Value::Number(value) = value else {
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return Err(invalid("screen position requires integer coordinates"));
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};
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// 屏幕位置必须为整数，允许负坐标以覆盖多显示器；范围与 i32 转换均检查，不能把小数直接截断。
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value
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.as_i64()
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.filter(|number| (-1_000_000..=1_000_000).contains(number))
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.and_then(|number| i32::try_from(number).ok())
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.ok_or(invalid("screen position exceeds limits"))
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}
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/// 从源 Value 取得窗口操作需要的数值，保留错误类型诊断。
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fn scalar(value: &Value) -> Result<f64, VmError> {
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let Value::Number(value) = value else {
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return Err(invalid("window size requires numbers"));
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};
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let number = value
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.to_string()
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.parse::<f64>()
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.map_err(|_| invalid("invalid window size"))?;
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if !number.is_finite() || !(1.0..=MAX_WINDOW_DIMENSION).contains(&number) {
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return Err(invalid("window size exceeds limits"));
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}
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Ok(number)
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}
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#[derive(Debug, Clone, Copy)]
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/// 当前宿主 API 的操作分类，分派代码负责参数校验与状态更新。
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enum Operation {
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Id,
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Viewport,
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Pages,
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Resize,
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MoveTo,
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SetTitle,
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Focus,
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}
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#[derive(Debug)]
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/// 保存 owner、签名或操作枚举的原生方法适配器，统一由 VM 调用。
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struct Method {
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signature: endor_core::CallSignature,
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operation: Operation,
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desktop: ObjectRef,
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}
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impl NativeCallable for Method {
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/// 给出参数与返回值的托管类型契约；实际操作在 invoke 中执行。
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fn signature(&self) -> Option<endor_core::CallSignature> {
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Some(self.signature.clone())
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}
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/// 计入 Window 接收者：resize/moveTo 共三参，setTitle 两参，其他查询/关闭/聚焦只要接收者。
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fn arity(&self) -> Option<endor_core::CallArity> {
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Some(endor_core::CallArity::exact(match self.operation {
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Operation::Resize | Operation::MoveTo => 3,
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Operation::SetTitle => 2,
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_ => 1,
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}))
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}
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/// 验证窗口资源与关闭状态；查询返回托管值，原生变更生成受世代保护的待执行命令，关闭走资源生命周期。
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fn invoke(&self, cx: &mut NativeContext<'_>, args: &[Value]) -> Result<NativeResult, VmError> {
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let Some(Value::Object(owner)) = args.first() else {
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return Err(invalid("Window method requires a Window"));
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};
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let data = cx
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.store()
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.payload::<ManagedWindow>(*owner, "Window")?
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.clone();
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// 已关闭窗口仍可查询稳定 ID 与页面集合，其他读取/操作拒绝，避免用旧 viewport 或重开原生资源。
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if data.closed && !matches!(self.operation, Operation::Id | Operation::Pages) {
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return Err(invalid("native window is closed"));
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}
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let expected = match self.operation {
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Operation::Resize | Operation::MoveTo => 3,
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Operation::SetTitle => 2,
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_ => 1,
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};
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if args.len() != expected {
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return Err(invalid("incorrect Window method argument count"));
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}
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let result = match self.operation {
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Operation::Id => Value::Number((data.id as i64).into()),
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Operation::Pages => {
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Value::Object(object_list::collection(cx, data.pages, self.desktop)?)
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}
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// 读取该 Window 自己 desktop 的逻辑视口，封装成 MeasureResult；尚未由原生侧提供尺寸时明确失败。
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Operation::Viewport => {
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let Value::Object(input) = cx.store().get_attr(data.desktop, "viewport")? else {
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return Err(invalid("window viewport is unavailable"));
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};
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let width = cx.store().get_attr(input, "width")?;
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let height = cx.store().get_attr(input, "height")?;
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Value::Object(native_visual::record(
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cx,
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self.desktop,
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"MeasureResult",
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vec![("width", width), ("height", height)],
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)?)
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}
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operation => {
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// 原生命令虽暂存在内存，也属于变更，不能从只读测量/绘制回调发起窗口操作。
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if cx.store().is_read_only() {
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return Err(invalid(
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"window operations are forbidden during read-only rendering",
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));
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}
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let action = match operation {
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Operation::MoveTo => Action::MoveTo {
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x: screen_coordinate(&args[1])?,
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y: screen_coordinate(&args[2])?,
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},
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Operation::Resize => Action::Resize {
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width: scalar(&args[1])?,
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height: scalar(&args[2])?,
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},
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Operation::SetTitle => {
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let Value::Text(title) = &args[1] else {
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return Err(invalid("window title requires text"));
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};
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// 标题限制 UTF-8 字节长度并拒绝控制字符；不会在这里执行标题文本或展开 shell 字符。
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if title.len() > 4096 || title.chars().any(char::is_control) {
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return Err(invalid("invalid window title"));
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}
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Action::SetTitle(title.clone())
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}
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Operation::Focus => Action::Focus,
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_ => unreachable!(),
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};
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enqueue(cx, *owner, action)?;
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Value::Nil
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}
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};
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Ok(NativeResult::Return(result))
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}
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}
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/// 把合法窗口操作追加到所属窗口的待发布命令，不能直接在 VM 线程操作 OS。
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pub fn enqueue(
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cx: &mut NativeContext<'_>,
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owner: ObjectRef,
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action: Action,
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) -> Result<(), VmError> {
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let mut data = cx
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.store()
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.payload::<ManagedWindow>(owner, "Window")?
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.clone();
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// 命令序列单调递增且检查溢出；同类合并会产生序号空洞，但仍可按序比较先后。
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data.sequence = data
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.sequence
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.checked_add(1)
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.ok_or(invalid("window command sequence exhausted"))?;
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let command = Command {
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window: data.id,
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sequence: data.sequence,
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action,
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};
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let queue = data.outbox.clone();
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let mut queue = queue
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.lock()
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.map_err(|_| invalid("window outbox poisoned"))?;
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// The heap barrier succeeds before any external transport state changes.
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// 必须先成功经过 VM 写屏障，才修改不可回滚的原生 outbox；只读调用不能先留下待发命令再报错。
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cx.replace_payload(owner, data)?;
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// 同窗口同动作只保留最后请求，其他类别保持先后；此处只入队，GUI 是否执行取决于后续成功发布。
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queue.retain(|old| !old.same_kind(&command));
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queue.push(command);
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Ok(())
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}
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/// 将页面登记到其窗口，维护托管所有权与页面顺序。
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pub fn register_page(
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cx: &mut NativeContext<'_>,
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window: ObjectRef,
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page: ObjectRef,
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) -> Result<(), VmError> {
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if cx.store().is_read_only() {
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return Err(invalid(
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"opening a Page is forbidden during read-only rendering",
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));
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}
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let mut data = cx
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.store()
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.payload::<ManagedWindow>(window, "Window")?
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.clone();
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if data.closed {
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return Err(invalid("native window is closed"));
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}
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// 登记幂等，首次同时写 tabs 与 payload；字典键使用页面身份文本而非标题，重命名不改变登记。
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if !data.pages.contains(&page) {
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data.pages.push(page);
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cx.dict_set(
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data.tabs,
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Value::Text(page.to_string()),
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Value::Object(page),
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)?;
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cx.replace_payload(window, data)?;
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}
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Ok(())
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}
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/// 从窗口的页面集合撤销指定页面，保持后续展示索引一致。
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pub fn unregister_page(
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cx: &mut NativeContext<'_>,
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window: ObjectRef,
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page: ObjectRef,
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) -> Result<(), VmError> {
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if cx.store().is_read_only() {
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return Err(invalid(
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"closing a Page is forbidden during read-only rendering",
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));
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}
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let mut data = cx
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.store()
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.payload::<ManagedWindow>(window, "Window")?
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.clone();
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// 不存在时撤销是空操作；存在时同时删有序列表与 tabs 字典边，不能只隐藏原生标签。
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if !data.pages.contains(&page) {
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return Ok(());
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}
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data.pages.retain(|value| *value != page);
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cx.dict_delete(data.tabs, &Value::Text(page.to_string()))?;
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cx.replace_payload(window, data)?;
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Ok(())
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}
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/// Discard an unpublished Page registration without invoking guest callbacks.
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/// 宿主收尾路径撤销页面登记，用于已经由外层决定的关闭/退役流程。
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pub fn unregister_page_host(
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vm: &mut Vm,
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window: ObjectRef,
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page: ObjectRef,
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) -> Result<(), VmError> {
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let mut data = vm.payload::<ManagedWindow>(window, "Window")?.clone();
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if data.pages.contains(&page) {
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data.pages.retain(|value| *value != page);
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vm.dict_delete(data.tabs, &Value::Text(page.to_string()))?;
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vm.replace_payload(window, data)?;
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}
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Ok(())
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}
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/// 在同一窗口的已登记页面集合内重排标签位置，保留 Page 身份；不负责跨窗口迁移。
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pub fn move_page(
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cx: &mut NativeContext<'_>,
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window: ObjectRef,
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page: ObjectRef,
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position: usize,
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) -> Result<(), VmError> {
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let mut data = cx
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.store()
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.payload::<ManagedWindow>(window, "Window")?
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.clone();
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if data.closed {
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return Err(invalid("native window is closed"));
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}
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let from = data
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.pages
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.iter()
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.position(|candidate| *candidate == page)
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.ok_or(invalid("Page is not open in this window"))?;
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if position >= data.pages.len() {
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return Err(invalid("tab position out of range"));
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}
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if cx.store().is_read_only() {
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return Err(invalid(
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"tab ordering is forbidden during read-only rendering",
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));
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}
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// 只重排当前窗口中的页面，不迁移到另一窗口，也不销毁或重建 Page/Mount；跨窗口迁移由桥接层组合操作。
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if from != position {
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let page = data.pages.remove(from);
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data.pages.insert(position, page);
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cx.replace_payload(window, data)?;
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}
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Ok(())
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}
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/// 借用一个有效托管窗口的已登记页面集合。
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pub fn pages(store: &ObjectStore, window: ObjectRef) -> Result<&[ObjectRef], VmError> {
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Ok(&store.payload::<ManagedWindow>(window, "Window")?.pages)
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}
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/// 取走当前窗口累积的命令，后续由成功发布结果携带到 GUI。
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pub fn take_commands(vm: &Vm, window: ObjectRef) -> Result<Vec<Command>, VmError> {
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let data = vm.payload::<ManagedWindow>(window, "Window")?;
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let mut queue = data
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.outbox
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.lock()
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.map_err(|_| invalid("window outbox poisoned"))?;
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// 一次移走全部队列，再按序号排序；仅消费传输状态，不调用 replace_payload 或改变语言依赖版本。
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let mut commands = std::mem::take(&mut *queue);
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commands.sort_by_key(|command| command.sequence);
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Ok(commands)
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}
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/// 把本模块的类型、方法或能力注册到所属运行时上下文。
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pub fn install(
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vm: &mut Vm,
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roots: &mut Vec<ObjectRef>,
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desktop: ObjectRef,
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tabs: ObjectRef,
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) -> Result<ObjectRef, VmError> {
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let definition = desktop_type(vm.object_store(), "Window", desktop)?;
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let function_type = desktop_type(vm.object_store(), "Function", desktop)?;
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for (name, operation) in [
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("id", Operation::Id),
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("viewport", Operation::Viewport),
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("pages", Operation::Pages),
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("resize", Operation::Resize),
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("moveTo", Operation::MoveTo),
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("setTitle", Operation::SetTitle),
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("focus", Operation::Focus),
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] {
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use endor_core::{AnnotationType as T, CallEffect, CallSignature};
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let (parameters, returns, effect) = match operation {
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Operation::Id => (vec![], T::Number, CallEffect::ReadOnly),
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Operation::Pages => (
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vec![],
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T::Nominal(desktop_type(vm.object_store(), "ObjectList", desktop)?),
|
||
CallEffect::ReadOnly,
|
||
),
|
||
Operation::Viewport => (
|
||
vec![],
|
||
T::Nominal(desktop_type(vm.object_store(), "MeasureResult", desktop)?),
|
||
CallEffect::ReadOnly,
|
||
),
|
||
Operation::Resize | Operation::MoveTo => {
|
||
(vec![T::Number, T::Number], T::Unit, CallEffect::Mutating)
|
||
}
|
||
Operation::SetTitle => (vec![T::String], T::Unit, CallEffect::Mutating),
|
||
Operation::Focus => (vec![], T::Unit, CallEffect::Mutating),
|
||
};
|
||
let mut arguments = vec![T::Nominal(definition)];
|
||
arguments.extend(parameters);
|
||
let function = vm.allocate(ContextNativeFunction::new(
|
||
name,
|
||
Method {
|
||
operation,
|
||
desktop,
|
||
signature: CallSignature::exact(arguments, returns, effect),
|
||
},
|
||
vec![desktop],
|
||
))?;
|
||
roots.push(function);
|
||
vm.attach_type(function, function_type)?;
|
||
vm.define_method(definition, name, function)?;
|
||
}
|
||
// 安装主窗口托管资源，原生 OS 窗口生命周期仍由 GUI 管理；页面集合初始为空。
|
||
let window = vm.allocate(ManagedWindow {
|
||
id: MAIN_WINDOW,
|
||
desktop,
|
||
closed: false,
|
||
tasks: None,
|
||
tabs,
|
||
pages: Vec::new(),
|
||
sequence: 0,
|
||
outbox: Arc::new(Mutex::new(Vec::new())),
|
||
})?;
|
||
roots.push(window);
|
||
vm.attach_type(window, definition)?;
|
||
vm.set_attr(desktop, "window", Value::Object(window))?;
|
||
// 主 desktop 拥有统一窗口注册表，以纯数字 ID 文本索引；注册表让附加窗口在 VM 图内可达。
|
||
let windows = vm.new_dict()?;
|
||
vm.set_attr(desktop, "windows", Value::Object(windows))?;
|
||
vm.dict_set(
|
||
windows,
|
||
Value::Text(MAIN_WINDOW.to_string()),
|
||
Value::Object(window),
|
||
)?;
|
||
vm.release(windows)?;
|
||
Ok(window)
|
||
}
|
||
|
||
/// Create a managed native-window resource. The GUI creates the OS resource only
|
||
/// after the owning candidate/input publishes its immutable projection.
|
||
/// 建立托管窗口、desktop 与页面容器；原生窗口通过命令发布后出现。
|
||
pub fn create(
|
||
cx: &mut NativeContext<'_>,
|
||
master: ObjectRef,
|
||
id: u64,
|
||
definition: ObjectRef,
|
||
) -> Result<(ObjectRef, ObjectRef, ObjectRef), VmError> {
|
||
if cx.store().is_read_only() {
|
||
return Err(invalid(
|
||
"window creation is forbidden during read-only rendering",
|
||
));
|
||
}
|
||
let desktop = cx.new_object()?;
|
||
let tabs = cx.new_dict()?;
|
||
// 附加桌面共享主域的同一 types 字典身份，保证跨窗口对象和协议使用同一名义类型体系。
|
||
let types = cx.store().get_attr(master, "types")?;
|
||
cx.set_attr(desktop, "types", types)?;
|
||
cx.set_attr(desktop, "viewport", Value::Nil)?;
|
||
cx.set_attr(desktop, "tabs", Value::Object(tabs))?;
|
||
let window = cx.allocate(ManagedWindow {
|
||
id,
|
||
desktop,
|
||
closed: false,
|
||
tasks: None,
|
||
tabs,
|
||
pages: Vec::new(),
|
||
sequence: 0,
|
||
outbox: Arc::new(Mutex::new(Vec::new())),
|
||
})?;
|
||
cx.attach_type(window, definition)?;
|
||
cx.set_attr(desktop, "window", Value::Object(window))?;
|
||
let Value::Object(windows) = cx.store().get_attr(master, "windows")? else {
|
||
return Err(invalid("window registry missing"));
|
||
};
|
||
cx.dict_set(windows, Value::Text(id.to_string()), Value::Object(window))?;
|
||
// 返回创建的三个托管身份供桥接层建立 Presentation；此函数不直接申请 OS 资源或发起布局。
|
||
Ok((window, desktop, tabs))
|
||
}
|
||
|
||
/// 取消窗口/页面任务并撤销登记，标记 closed 后安排原生关闭；重复关闭直接返回。
|
||
pub fn close(cx: &mut NativeContext<'_>, window: ObjectRef) -> Result<(), VmError> {
|
||
if cx.store().is_read_only() {
|
||
return Err(invalid(
|
||
"window close is forbidden during read-only rendering",
|
||
));
|
||
}
|
||
let mut data = cx
|
||
.store()
|
||
.payload::<ManagedWindow>(window, "Window")?
|
||
.clone();
|
||
if data.closed {
|
||
return Ok(());
|
||
}
|
||
// 真实关闭边界先取消窗口与所有页面 owner 的任务，再撤销页面登记，防止晚到结果继续更新已关闭资源。
|
||
crate::tasks::cancel_owner(cx, window)?;
|
||
for page in data.pages.clone() {
|
||
crate::tasks::cancel_owner(cx, page)?;
|
||
unregister_page(cx, window, page)?;
|
||
}
|
||
// 循环内 unregister_page 已替换过 Window payload，必须重读最新副本，不能用最初 data 把已移除页面写回。
|
||
data = cx
|
||
.store()
|
||
.payload::<ManagedWindow>(window, "Window")?
|
||
.clone();
|
||
data.closed = true;
|
||
cx.replace_payload(window, data)?;
|
||
// 标记托管 closed 后仍可由内部 enqueue 安排原生 Close；成功输入发布前不会直接关闭系统窗口。
|
||
enqueue(cx, window, Action::Close)
|
||
}
|
||
|
||
/// Host teardown for a stopped VM: no binding, dispatch or source execution.
|
||
/// 撤销已失效窗口的托管资源关系，不重新执行源关闭请求。
|
||
pub fn retire(vm: &mut Vm, window: ObjectRef) -> Result<(), VmError> {
|
||
let mut data = vm.payload::<ManagedWindow>(window, "Window")?.clone();
|
||
// 故障域的宿主退役仅断开页面拥有边并标 closed，不跑用户回调、不重新生成源关闭命令。
|
||
vm.dict_clear(data.tabs)?;
|
||
data.pages.clear();
|
||
data.closed = true;
|
||
vm.replace_payload(window, data)
|
||
}
|