238 lines
9.3 KiB
Rust
238 lines
9.3 KiB
Rust
//! 一个原生窗口对应一份 Presentation：独立视口、Mount、测量缓存、焦点与依赖记录。
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//! 多个窗口仍使用同一个 VM 和共享业务对象。读取版本失效时只标记相关展示需要刷新，不能因此复制一份业务状态。
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//!
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//! Per-window rendering state. Business objects and code remain in one VM.
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//! Registries and caches borrow checked identities; the managed desktop owns
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//! presentation roots through its pending/mount dictionaries.
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use crate::ui_bridge::UiNode;
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use endor_core::{ChangeBatch, NativeContext, ObjectRef, Vm, VmError, WeakObjectRef};
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use std::sync::Arc;
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#[derive(Debug)]
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/// 一个窗口独立的展示状态：活动页面、待提交请求、Mount、布局与源读取缓存；共享 VM 的业务状态不放在这里复制。
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pub(crate) struct Presentation {
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pub desktop: ObjectRef,
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pub closing: bool,
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pub tabs: ObjectRef,
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pub active: Option<ObjectRef>,
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pub pending: Option<Option<ObjectRef>>,
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pub last_snapshot: Option<Arc<UiNode>>,
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pub tab_ids: Vec<(WeakObjectRef, u64)>,
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pub next_tab: u64,
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pub last_tabs: Vec<crate::tabs::Tab>,
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pub surface: crate::page::Surface,
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pub render_cache: crate::snapshot::RenderCache,
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pub layout: crate::layout::LayoutRuntime,
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pub mounts: crate::mount::MountTable,
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pub published_version: u64,
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pub force_frame: bool,
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pub paint_names: Vec<endor_core::ReadDependency>,
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pub layout_names: Vec<endor_core::ReadDependency>,
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pub paint_reads: std::collections::BTreeMap<ObjectRef, u64>,
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pub dependency_invalidations: usize,
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pub last_invalid_dependency: String,
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pub layout_reads: std::collections::BTreeMap<ObjectRef, u64>,
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pub measure_cache: crate::source_layout::Cache,
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pub snapshot_visited: usize,
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pub snapshot_reused: usize,
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}
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impl Presentation {
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/// 比较布局/绘制读取版本和名称依赖，标记需要刷新并通知快照缓存。
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pub fn observe_changes(&mut self, vm: &Vm, changes: &ChangeBatch) {
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if let Some((phase, object, version)) = self
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.layout_reads
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.iter()
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.map(|(object, version)| ("layout", object, version))
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.chain(
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self.paint_reads
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.iter()
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.map(|(object, version)| ("paint", object, version)),
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)
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.find(|(_, object, version)| vm.change_version(**object).ok() != Some(**version))
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{
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self.force_frame = true;
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self.dependency_invalidations = self.dependency_invalidations.saturating_add(1);
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let kind = vm
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.object(*object)
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.map(|value| value.payload().kind_name())
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.unwrap_or("released");
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self.last_invalid_dependency = format!(
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"{phase} {kind} {object}: {version} -> {:?}",
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vm.change_version(*object).ok()
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);
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}
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if let Some((phase, dependency)) = self
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.layout_names
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.iter()
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.map(|dependency| ("layout", dependency))
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.chain(
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self.paint_names
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.iter()
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.map(|dependency| ("paint", dependency)),
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)
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.find(|(_, dependency)| !vm.object_store().read_dependency_valid(dependency))
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{
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self.force_frame = true;
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self.dependency_invalidations = self.dependency_invalidations.saturating_add(1);
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let name = match dependency {
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endor_core::ReadDependency::Name { name, .. } => name.as_str(),
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_ => "<dictionary kind>",
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};
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self.last_invalid_dependency = format!("{phase} name {}:{name}", dependency.object());
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}
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self.render_cache.invalidate(ChangeBatch {
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changes: changes.changes.clone(),
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rescan_required: changes.rescan_required,
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});
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}
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/// 按尺寸、内容或绘制失效原因清理对应缓存，避免把所有变化都当成相同重建。
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pub fn invalidate(
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&mut self,
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cx: &mut NativeContext<'_>,
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affected: &std::collections::HashSet<ObjectRef>,
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reason: &str,
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) -> Result<(), VmError> {
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if reason != "paint" {
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self.measure_cache.invalidate(affected);
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for block in affected {
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self.layout.invalidate(&block.to_string());
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}
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}
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if reason == "content" {
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self.render_cache
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.invalidate_objects(affected.iter().copied());
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}
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for weak in self.mounts.active.values() {
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if let Some(mount) = cx.upgrade(*weak)?
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&& affected.contains(
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&cx.store()
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.payload::<crate::mount::Mount>(mount, "Mount")?
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.block,
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)
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{
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self.force_frame = true;
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}
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}
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Ok(())
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}
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/// 构造本类型并初始化其状态；资源建立和默认字段以函数体为准。
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pub fn new(desktop: ObjectRef, tabs: ObjectRef) -> Self {
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Self {
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desktop,
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closing: false,
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tabs,
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active: None,
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pending: None,
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last_snapshot: None,
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tab_ids: Vec::new(),
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next_tab: 0,
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last_tabs: Vec::new(),
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surface: crate::page::Surface::default(),
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render_cache: crate::snapshot::RenderCache::default(),
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layout: crate::layout::LayoutRuntime::default(),
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mounts: crate::mount::MountTable::default(),
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published_version: 0,
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force_frame: false,
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paint_names: Vec::new(),
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layout_names: Vec::new(),
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paint_reads: std::collections::BTreeMap::new(),
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dependency_invalidations: 0,
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last_invalid_dependency: String::new(),
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layout_reads: std::collections::BTreeMap::new(),
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measure_cache: crate::source_layout::Cache::default(),
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snapshot_visited: 0,
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snapshot_reused: 0,
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}
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}
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}
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/// 把读取记录拆成对象版本和精确名称依赖，便于按实际观察内容判断失效。
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pub(crate) fn split_reads(
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reads: Vec<endor_core::ReadDependency>,
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) -> (
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std::collections::BTreeMap<ObjectRef, u64>,
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Vec<endor_core::ReadDependency>,
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) {
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let mut objects = std::collections::BTreeMap::new();
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let mut names = Vec::new();
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for dependency in reads {
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match dependency {
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endor_core::ReadDependency::Object { object, version } => {
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objects.insert(object, version);
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}
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dependency => names.push(dependency),
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}
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}
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(objects, names)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::{layout::Size, ui_bridge::UiKind};
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#[test]
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fn independent_view_geometry_and_shared_vm_reads_do_not_add_roots() {
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let mut vm = Vm::new().unwrap();
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let mut left = Presentation::new(vm.new_object().unwrap(), vm.new_dict().unwrap());
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let mut right = Presentation::new(vm.new_object().unwrap(), vm.new_dict().unwrap());
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left.layout.viewport = Some(Size {
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width: 100.0,
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height: 80.0,
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});
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right.layout.viewport = Some(Size {
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width: 200.0,
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height: 160.0,
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});
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let root = UiNode {
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surface: None,
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flex: 0.0,
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flex_policy: crate::layout::FlexPolicy::default(),
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main_align: crate::layout::MainAlign::Start,
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cross_align: crate::layout::CrossAlign::Start,
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align_self: None,
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margin: crate::layout::Insets::default(),
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sizing: crate::box_model::Sizing::default(),
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padding_edges: [None; 4],
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border: crate::layout::Insets::default(),
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border_color: "#D8DCE2".into(),
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clip_children: false,
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block_id: "shared".into(),
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protocol_key: "rect".into(),
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slots: Vec::new(),
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interactive: false,
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kind: UiKind::Rect {
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width: 500.0,
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height: 500.0,
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radius: 0.0,
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color: "#237A45".into(),
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},
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};
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let left_frame = left.layout.frame(&root).unwrap();
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let right_frame = right.layout.frame(&root).unwrap();
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assert_eq!(left_frame.mounts[0].width, 100.0);
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assert_eq!(right_frame.mounts[0].width, 200.0);
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left.layout.clear_occurrences();
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let new_left = left.layout.frame(&root).unwrap();
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let same_right = right.layout.frame(&root).unwrap();
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assert_ne!(new_left.mounts[0].id, left_frame.mounts[0].id);
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assert_eq!(same_right.mounts[0].id, right_frame.mounts[0].id);
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let shared = vm.new_object().unwrap();
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let version = vm.change_version(shared).unwrap();
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left.paint_reads.insert(shared, version);
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right.layout_reads.insert(shared, version);
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vm.set_attr(shared, "value", endor_core::Value::Bool(true))
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.unwrap();
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let changes = vm.take_changes();
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left.observe_changes(&vm, &changes);
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right.observe_changes(&vm, &changes);
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assert!(left.force_frame && right.force_frame);
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let weak = vm.downgrade(shared).unwrap();
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vm.release(shared).unwrap();
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vm.collect_cycles();
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assert!(vm.upgrade(weak).unwrap().is_none());
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}
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}
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