554 lines
22 KiB
Rust
554 lines
22 KiB
Rust
//! 执行源 paint 覆盖并解码受检查的 PaintCommand。
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//! 所有绘制回调位于只读域；临时返回对象可分配，但已有模型不可写。命令数量、类型、坐标和颜色在合入帧前检查。
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//! 源命令与原生命令按 Mount 绘制顺序合并，随后装配世界 UI 面板。挂起绘制同样需要显式恢复或取消。
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//!
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//! Source paint dispatch produces checked immutable commands. One read-only VM
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//! resumable call sequences all overrides, sharing one instruction/frame budget.
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use crate::{
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document::{Frame, RenderCommand},
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layout::{self, Size},
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mount::Mount,
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object_list,
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ui_bridge::{MAX_DIMENSION, UiNode, attach_desktop_type},
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};
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use anyhow::{Result, bail};
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use endor_core::{
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ContextNativeFunction, NativeCallable, NativeContext, NativeResult, ObjectRef, ObjectStore,
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Value, Vm, VmError, WeakObjectRef,
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};
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use std::{
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collections::{BTreeMap, HashMap},
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sync::{Arc, Mutex},
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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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/// 从源值中提取并检查托管对象身份，错误类型沿 VM 错误返回。
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fn object(value: Value) -> Result<ObjectRef, VmError> {
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if let Value::Object(object) = value {
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Ok(object)
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} else {
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Err(invalid("paint must return managed objects"))
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}
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}
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/// 读取指定命令字段并要求其值为 Text；不隐式字符串化其他类型。
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fn text(store: &ObjectStore, object: ObjectRef, name: &str) -> Result<String, VmError> {
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if let Value::Text(value) = store.get_attr(object, name)? {
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Ok(value)
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} else {
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Err(invalid("paint field must be text"))
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}
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}
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/// 在源 Value 与所需数值表示之间转换，并沿用本调用的有限值/范围检查。
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fn number(store: &ObjectStore, object: ObjectRef, name: &str) -> Result<f32, VmError> {
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let Value::Number(value) = store.get_attr(object, name)? else {
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return Err(invalid("paint field must be a Number"));
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};
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// x/y 允许负数以表达相对原点的绘制；其余长度必须非负。所有数值都必须有限且在尺寸预算内。
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let value = value
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.to_string()
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.parse::<f32>()
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.map_err(|_| invalid("invalid paint number"))?;
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if !value.is_finite()
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|| value.abs() > MAX_DIMENSION as f32
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|| (!matches!(name, "x" | "y") && value < 0.0)
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{
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return Err(invalid("paint number exceeds bounds"));
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}
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Ok(value)
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}
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/// 从当前 desktop 的类型注册表取得绘制结果必须符合的托管类型。
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fn named_type(store: &ObjectStore, desktop: ObjectRef, name: &str) -> Result<ObjectRef, VmError> {
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let registry = object(store.get_attr(desktop, "types")?)?;
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object(
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store
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.dict_get(registry, &Value::Text(name.into()))?
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.ok_or(invalid("missing paint type"))?,
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)
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}
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/// 把源方法返回的托管绘制值解码成受限 Rust 命令，检查名义类型、字段和绘制预算。
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fn decode(
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store: &ObjectStore,
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command: ObjectRef,
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expected: ObjectRef,
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) -> Result<RenderCommand, VmError> {
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// 使用当前 desktop 注册的 PaintCommand 名义类型；字段形状相似的普通对象也不能冒充命令。
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if !store.is_instance(command, expected)? {
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return Err(invalid("paint commands must be PaintCommand instances"));
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}
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let x = number(store, command, "x")?;
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let y = number(store, command, "y")?;
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let kind = text(store, command, "kind")?;
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// 3D 命令使用不可变场景视图，不读取颜色文本；其他命令的颜色由最终 validate 统一校验。
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let color = if kind == "scene3d" {
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String::new()
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} else {
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text(store, command, "color")?
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};
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let result = match kind.as_str() {
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"scene3d" => {
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// 这里仅接受宿主生成的 PaintView payload，克隆原生 Arc，不把活动的 VM 场景图传到绘制线程。
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let snapshot = object(store.get_attr(command, "scene")?)?;
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RenderCommand::Scene3D {
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x,
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y,
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width: number(store, command, "width")?,
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height: number(store, command, "height")?,
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view: store
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.payload::<crate::scene3d::PaintView>(snapshot, "immutable 3D paint snapshot")?
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.0
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.clone(),
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}
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}
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"roundedRect" | "strokeRoundedRect" => {
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let width = number(store, command, "width")?;
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let height = number(store, command, "height")?;
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let radius = number(store, command, "radius")?;
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// 单项数值合法还不足以保证右/下边界合法；额外检查原点与尺寸相加后的范围。
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if x + width > MAX_DIMENSION as f32 || y + height > MAX_DIMENSION as f32 {
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return Err(invalid("paint rectangle exceeds bounds"));
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}
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if kind == "roundedRect" {
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RenderCommand::RoundedRect {
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x,
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y,
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width,
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height,
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radius,
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color,
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}
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} else {
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RenderCommand::StrokeRoundedRect {
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x,
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y,
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width,
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height,
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radius,
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color,
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stroke_width: number(store, command, "strokeWidth")?,
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}
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}
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}
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"text" => {
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let size = number(store, command, "size")?;
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// size 是离散文字等级而非任意像素字号，只接受 1 到 8 的整数。
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if size.fract() != 0.0 || !(1.0..=8.0).contains(&size) {
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return Err(invalid("paint text size must be an integer from 1 to 8"));
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}
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// 两个换行边界必须同时出现或同时缺失；只缺一个时传播属性错误，防止半定义文本框。
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let wrap_bounds = match (
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store.get_attr(command, "wrapWidth"),
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store.get_attr(command, "wrapHeight"),
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) {
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(Err(VmError::AttributeNotFound(_)), Err(VmError::AttributeNotFound(_))) => None,
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(Ok(_), Ok(_)) => Some([
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number(store, command, "wrapWidth")?,
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number(store, command, "wrapHeight")?,
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]),
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(Err(error), _) | (_, Err(error)) => return Err(error),
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};
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RenderCommand::Text {
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x,
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y,
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value: text(store, command, "text")?,
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size: size as u32,
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color,
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wrap_bounds,
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}
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}
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_ => return Err(invalid("unsupported paint command kind")),
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};
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// 变体字段解码后仍走统一命令校验，覆盖颜色格式、文本以及组合几何合法性。
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result
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.validate()
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.map_err(|_| invalid("invalid paint command geometry, text or color"))?;
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Ok(result)
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}
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#[derive(Debug, Default)]
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/// 按出现 ID 收集已检查的源绘制覆盖，随后与原生默认命令合并。
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struct PaintOutput {
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// 按出现 ID 收集覆盖；同一个业务 Block 在多个 Mount 中可产生不同绘制结果。
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commands: BTreeMap<u64, Vec<RenderCommand>>,
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// 全轮源命令累计数，不能靠拆分多个源 DisplayList 绕过 10000 条总预算。
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count: usize,
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}
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type Output = Arc<Mutex<PaintOutput>>;
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#[derive(Debug)]
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/// 检查源 paint 返回列表并将命令保存到当前出现的绘制结果。
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struct Collect {
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desktop: ObjectRef,
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mount: u64,
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output: Output,
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}
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impl NativeCallable for Collect {
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/// 接收当前出现位置 paint 的唯一 DisplayList 结果。
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fn arity(&self) -> Option<endor_core::CallArity> {
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Some(endor_core::CallArity::exact(1))
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}
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/// 验证返回名义类型并完整解码所有 PaintCommand，检查全轮命令预算后才把该出现位置结果写入输出表。
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fn invoke(&self, cx: &mut NativeContext<'_>, args: &[Value]) -> Result<NativeResult, VmError> {
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let [Value::Object(result)] = args else {
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return Err(invalid("paint must return a DisplayList"));
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};
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if !cx.store().is_instance(
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*result,
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named_type(cx.store(), self.desktop, "DisplayList")?,
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)? {
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return Err(invalid("paint must return a DisplayList"));
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}
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// 先验证外层 DisplayList，再取其受控 ObjectList；所有成员解码成功后才写入 output。
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let commands = object(cx.store().get_attr(*result, "commands")?)?;
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let expected = named_type(cx.store(), self.desktop, "PaintCommand")?;
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let commands = object_list::items(cx.store(), commands)?
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.iter()
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.map(|command| decode(cx.store(), *command, expected))
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.collect::<Result<Vec<_>, _>>()?;
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// 仅收集结果时持锁，不在调用源 paint 期间持有结果锁；失败不会插入半个命令列表。
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let mut output = self
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.output
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.lock()
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.map_err(|_| invalid("paint output poisoned"))?;
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if output.count + commands.len() > 10_000 {
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return Err(invalid("paint command budget exceeded"));
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}
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output.count += commands.len();
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output.commands.insert(self.mount, commands);
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Ok(NativeResult::Return(Value::Nil))
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}
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}
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#[derive(Debug)]
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/// 为当前出现准备 paint 方法、几何和类型检查上下文。
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struct Prepare {
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desktop: ObjectRef,
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mounts: Vec<(u64, WeakObjectRef)>,
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output: Output,
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}
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impl NativeCallable for Prepare {
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/// 零参数驱动入口，待绘制 Mount 和输出容器已保存在适配器。
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fn arity(&self) -> Option<endor_core::CallArity> {
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Some(endor_core::CallArity::exact(0))
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}
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/// 建立共享游标与固定外层字节码循环，让 VM 每轮只准备一个出现位置的 paint 调用。
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fn invoke(&self, cx: &mut NativeContext<'_>, _: &[Value]) -> Result<NativeResult, VmError> {
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// 构造一个共享游标驱动；每轮只准备当前出现，避免一次保留所有出现的临时实参。
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let advance = cx.allocate(ContextNativeFunction::new(
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"next paint occurrence",
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Advance {
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desktop: self.desktop,
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mounts: self.mounts.clone().into(),
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next: Mutex::new(0),
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output: self.output.clone(),
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},
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vec![self.desktop],
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))?;
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let function = crate::vm_sequence::repeat_call(cx, advance, "source paint", self.desktop)?;
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Ok(NativeResult::Invoke {
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function,
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arguments: vec![],
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})
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}
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}
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#[derive(Debug)]
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/// 安排下一个出现的绘制调用，保持原始绘制顺序和共享 VM 预算。
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struct Advance {
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desktop: ObjectRef,
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mounts: Arc<[(u64, WeakObjectRef)]>,
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next: Mutex<usize>,
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output: Output,
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}
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impl NativeCallable for Advance {
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/// 由外层循环无参调用，下一出现位置由内部游标决定。
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fn arity(&self) -> Option<endor_core::CallArity> {
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Some(endor_core::CallArity::exact(0))
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}
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/// 短锁内取并推进游标，随后验证/准备当前 Mount 的方法与几何；用临时调用链收集结果，完成后才进入下一位置。
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fn invoke(&self, cx: &mut NativeContext<'_>, _: &[Value]) -> Result<NativeResult, VmError> {
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// 锁只保护取游标与递增；离开此块后释放锁，再做 VM 分配和源调用。
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let occurrence = {
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let mut next = self
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.next
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.lock()
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.map_err(|_| invalid("paint cursor poisoned"))?;
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let occurrence = self.mounts.get(*next).copied();
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*next += usize::from(occurrence.is_some());
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occurrence
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};
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// false 是 repeat_call 的停止信号；有出现时即使跳过原生方法也返回 true 继续遍历。
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let Some((id, weak)) = occurrence else {
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return Ok(NativeResult::Return(Value::Bool(false)));
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};
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let mount = cx
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.upgrade(weak)?
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.ok_or(invalid("paint Mount has expired"))?;
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let data = cx.store().payload::<Mount>(mount, "Mount")?.clone();
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if !data.mounted {
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return Err(invalid("paint Mount is detached"));
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}
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let definition = cx
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.store()
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.type_of(data.block)?
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.ok_or(invalid("untyped paint target"))?;
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let function = cx
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.store()
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.lookup_method(definition, "paint")?
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.ok_or(invalid("missing paint method"))?;
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// 原生默认 paint 留给 finish 生成；仅执行实际覆盖的源方法，避免重复绘制同一出现。
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if crate::native_visual::is_intrinsic(cx.store(), function, "paint", self.desktop)? {
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return Ok(NativeResult::Return(Value::Bool(true)));
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}
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// 把已提交 Mount 几何封装为本轮临时 Bounds；新分配参数可初始化，业务模型仍处于只读域。
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let bounds = cx.new_object()?;
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attach_desktop_type(cx, bounds, "Bounds", self.desktop)?;
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for (name, value) in [
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("x", data.geometry.x),
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("y", data.geometry.y),
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("width", data.geometry.width),
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("height", data.geometry.height),
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] {
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cx.set_attr(bounds, name, Value::Number((value as f64).into()))?;
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}
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// 收集器只捕获桌面根和当前出现 ID；输出是原生共享容器，不增加业务图的强引用。
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let collector = cx.allocate(ContextNativeFunction::new(
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"collect source paint",
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Collect {
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desktop: self.desktop,
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mount: id,
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output: self.output.clone(),
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},
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vec![self.desktop],
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))?;
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// 辅助帧先执行 paint(block, mount, bounds)，收集其结果，再返回 true 推进外层游标。
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let function = crate::vm_sequence::collect_and_continue(
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cx,
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collector,
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function,
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vec![
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Value::Object(data.block),
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Value::Object(mount),
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Value::Object(bounds),
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],
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"paint occurrence",
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self.desktop,
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)?;
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Ok(NativeResult::Invoke {
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function,
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arguments: vec![],
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})
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}
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}
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/// 已经完成本阶段、但尚未由桥接层发布的派生结果，包含帧/缓存或真实读取依赖。
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pub struct Draft {
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// 已经合并命令的原生帧；Draft 仍需桥接层提交，完成计算不等于发布成功。
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pub frame: Frame,
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// 保留源绘制的业务读取依赖，供下次写入后判定是否必须重绘。
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pub reads: Vec<endor_core::ReadDependency>,
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pub slices: usize,
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}
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#[must_use = "pending paint must be resumed or cancelled on its owning VM"]
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/// 本次推进处于挂起还是完成；挂起工作必须继续恢复或显式取消。
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pub enum Progress {
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Pending(Box<Work>),
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Complete(Box<Draft>),
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}
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/// Only unpublished native commands and an owning prepare root cross a pause.
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/// 拥有未完成源调用及临时根的工作句柄；丢弃 Rust 值不能替代 VM 内的取消。
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pub struct Work {
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desktop: ObjectRef,
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// 跨切片保留的入口根；完成或取消都必须在所属 VM 中显式释放。
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prepare: ObjectRef,
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output: Output,
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root: Option<Arc<UiNode>>,
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frame: Frame,
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slices: usize,
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}
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impl Work {
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/// 继续当前绘制续体，保留其先前收集的命令和所属窗口上下文。
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pub fn resume(mut self, vm: &mut Vm, slice: usize) -> Result<Progress> {
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// 恢复保留原执行预算，slice 只决定本次让出的指令配额，不能重置整个绘制上限。
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self.slices += 1;
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let progress = vm.resume_read_only_call(slice);
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self.accept(vm, progress)
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}
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/// 关闭未完成绘制续体并释放其临时根，不发布半完成命令列表。
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pub fn cancel(self, vm: &mut Vm) -> Result<()> {
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// 先执行取消和 release 两个操作，再依次传播错误；取消失败也仍尝试释放入口根。
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let cancelled = vm.cancel_read_only_call();
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let released = vm.release(self.prepare);
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cancelled?;
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released?;
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Ok(())
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}
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/// 区分源绘制续体是挂起还是完成，保留工作或结束只读域并生成 Draft。
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fn accept(
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self,
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vm: &mut Vm,
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progress: Result<endor_core::ExecutionProgress, VmError>,
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) -> Result<Progress> {
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match progress {
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// 挂起时工作句柄继续持有 frame/output/prepare，不能发布部分输出。
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Ok(endor_core::ExecutionProgress::Pending { .. }) => {
|
|
Ok(Progress::Pending(Box::new(self)))
|
|
}
|
|
Ok(endor_core::ExecutionProgress::Complete {
|
|
value,
|
|
dependencies,
|
|
..
|
|
}) => {
|
|
// VM 完成后先释放入口与驱动返回值，再读取纯原生收集结果；返回值本身不作为绘制命令。
|
|
vm.release(self.prepare)?;
|
|
vm.release_value(value)?;
|
|
finish(vm, self, dependencies)
|
|
}
|
|
Err(error) => {
|
|
// 趁 VM 诊断信息仍可用先生成错误，再取消只读执行并清理临时根。
|
|
let diagnostic = crate::endor_host::runtime_error(vm, error);
|
|
self.cancel(vm)?;
|
|
Err(diagnostic)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// 建立本轮只读绘制驱动和结果收集器；源覆盖与原生默认绘制最终保持同一出现顺序。
|
|
pub fn start(
|
|
vm: &mut Vm,
|
|
desktop: ObjectRef,
|
|
mounts: Vec<(u64, WeakObjectRef)>,
|
|
root: Option<Arc<UiNode>>,
|
|
frame: Frame,
|
|
slice: usize,
|
|
) -> Result<Progress> {
|
|
// 禁止零切片和嵌套只读/挂起调用；同一 VM 同时只能由一个续体驱动。
|
|
anyhow::ensure!(slice > 0, "paint slice must be positive");
|
|
anyhow::ensure!(
|
|
!vm.has_suspended_call() && !vm.object_store().is_read_only(),
|
|
"cannot start paint while another read-only execution is active"
|
|
);
|
|
let output = Arc::new(Mutex::new(PaintOutput::default()));
|
|
let prepare = vm.allocate(ContextNativeFunction::new(
|
|
"prepare source paint",
|
|
Prepare {
|
|
desktop,
|
|
mounts,
|
|
output: output.clone(),
|
|
},
|
|
vec![desktop],
|
|
))?;
|
|
let work = Work {
|
|
desktop,
|
|
prepare,
|
|
output,
|
|
root,
|
|
frame,
|
|
slices: 1,
|
|
};
|
|
let result = vm.start_read_only_call(
|
|
prepare,
|
|
&[],
|
|
endor_core::ExecutionLimits {
|
|
max_frames: 128,
|
|
max_instructions: 1_000_000,
|
|
},
|
|
slice,
|
|
);
|
|
work.accept(vm, result)
|
|
}
|
|
|
|
/// 按 Mount 合并源覆盖和原生命令，补齐投影/裁剪表，再递归装配世界 UI 面板。
|
|
fn finish(vm: &mut Vm, mut work: Work, reads: Vec<endor_core::ReadDependency>) -> Result<Progress> {
|
|
let output = work
|
|
.output
|
|
.lock()
|
|
.map_err(|_| anyhow::anyhow!("paint output poisoned"))?;
|
|
// 是否有源覆盖以 map 是否为空判断；源方法返回空命令列表也算覆盖，会抑制该出现的默认绘制。
|
|
let native_only = output.commands.is_empty();
|
|
// 没有根时没有节点投影可合并，直接交回已有帧并清空绘制读取，不展开默认命令。
|
|
if work.root.is_none() {
|
|
return Ok(Progress::Complete(Box::new(Draft {
|
|
frame: work.frame,
|
|
reads: Vec::new(),
|
|
slices: work.slices,
|
|
})));
|
|
}
|
|
let root = work.root.as_deref();
|
|
let desktop = work.desktop;
|
|
let frame = &mut work.frame;
|
|
// 建立 Block ID 到不可变节点的索引；最终合并顺序仍以 frame.mounts 为准，不能按 map 排序。
|
|
let mut nodes = HashMap::new();
|
|
let mut pending: Vec<_> = root.into_iter().collect();
|
|
while let Some(node) = pending.pop() {
|
|
nodes.insert(node.block_id.as_str(), node);
|
|
pending.extend(node.children().iter().map(|node| node.as_ref()));
|
|
}
|
|
let mut commands = Vec::new();
|
|
let mut clips = Vec::new();
|
|
let mut views = Vec::new();
|
|
let mut owners = Vec::new();
|
|
for mount in &frame.mounts {
|
|
// 记录本出现追加前的长度，用差值为新增命令同步扩展 clip/view/owner 三张平行表。
|
|
let before = commands.len();
|
|
// 有源覆盖则使用其整个结果（包括空列表）；否则用节点和 Mount 几何生成原生默认命令。
|
|
if let Some(custom) = output.commands.get(&mount.id) {
|
|
commands.extend(custom.iter().cloned());
|
|
} else {
|
|
let node = nodes
|
|
.get(mount.block_id.as_str())
|
|
.ok_or_else(|| anyhow::anyhow!("paint projection has no node"))?;
|
|
commands.extend(layout::paint_commands(
|
|
node,
|
|
mount.x,
|
|
mount.y,
|
|
Size {
|
|
width: mount.width,
|
|
height: mount.height,
|
|
},
|
|
));
|
|
}
|
|
clips.extend(std::iter::repeat_n(mount.clip, commands.len() - before));
|
|
views.extend(std::iter::repeat_n(mount.view, commands.len() - before));
|
|
owners.extend(std::iter::repeat_n(mount.id, commands.len() - before));
|
|
// 混合原生与源命令后再检查总预算，前面的源输出预算不能覆盖这里新增的默认命令。
|
|
if commands.len() > 10_000 {
|
|
bail!("paint command budget exceeded");
|
|
}
|
|
}
|
|
frame.commands = commands;
|
|
frame.command_clips = clips;
|
|
frame.command_views = views;
|
|
frame.command_mounts = owners;
|
|
// 统一命令和投影元数据就绪后，再把世界 UI 面板装配进对应 3D 场景。
|
|
crate::scene3d::panel::compose(frame)?;
|
|
let registry = object(vm.get_attr(desktop, "types")?)?;
|
|
// 排除宿主桌面、类型注册表、Mount 以及已经死亡的临时身份，只保留业务读取。
|
|
// 纯原生帧不需要保留这次驱动的读取记录。
|
|
let reads = reads
|
|
.into_iter()
|
|
.filter(|dependency| {
|
|
let object = dependency.object();
|
|
!native_only
|
|
&& object != desktop
|
|
&& object != registry
|
|
&& vm
|
|
.object(object)
|
|
.is_ok_and(|object| !object.payload().as_any().is::<Mount>())
|
|
})
|
|
.collect();
|
|
Ok(Progress::Complete(Box::new(Draft {
|
|
frame: work.frame,
|
|
reads,
|
|
slices: work.slices,
|
|
})))
|
|
}
|