257 lines
11 KiB
Rust
257 lines
11 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。
|
|
//! 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。
|
|
//!
|
|
//! Per-window rendering state. Business objects and code remain in one VM.
|
|
//! Registries and caches borrow checked identities; the managed desktop owns
|
|
//! presentation roots through its pending/mount dictionaries.
|
|
use crate::ui_bridge::UiNode;
|
|
use endor_core::{ChangeBatch, NativeContext, ObjectRef, Vm, VmError, WeakObjectRef};
|
|
use std::sync::Arc;
|
|
|
|
#[derive(Debug)]
|
|
/// 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。
|
|
pub(crate) struct Presentation {
|
|
// 所属托管桌面身份；此结构借用身份，真正的展示根由托管桌面字典维持。
|
|
pub desktop: ObjectRef,
|
|
pub closing: bool,
|
|
pub tabs: ObjectRef,
|
|
pub active: Option<ObjectRef>,
|
|
// 双层 Option 区分三态：None 无请求，Some(None) 请求清空，Some(Some(page)) 请求切页。
|
|
pub pending: Option<Option<ObjectRef>>,
|
|
pub last_snapshot: Option<Arc<UiNode>>,
|
|
// 弱身份到原生稳定标签 ID 的映射；不能因为标签历史而保活已经关闭的页面。
|
|
pub tab_ids: Vec<(WeakObjectRef, u64)>,
|
|
pub next_tab: u64,
|
|
pub last_tabs: Vec<crate::tabs::Tab>,
|
|
pub surface: crate::page::Surface,
|
|
pub render_cache: crate::snapshot::RenderCache,
|
|
pub layout: crate::layout::LayoutRuntime,
|
|
pub mounts: crate::mount::MountTable,
|
|
pub published_version: u64,
|
|
// 即使根快照身份未变也要求重新发布一帧，例如源绘制读取的数据发生变化时。
|
|
pub force_frame: bool,
|
|
// 精确名称/字典种类依赖，与下面按整个对象版本记录的 reads 分开检查。
|
|
pub paint_names: Vec<endor_core::ReadDependency>,
|
|
pub layout_names: Vec<endor_core::ReadDependency>,
|
|
pub paint_reads: std::collections::BTreeMap<ObjectRef, u64>,
|
|
pub dependency_invalidations: usize,
|
|
pub last_invalid_dependency: String,
|
|
pub layout_reads: std::collections::BTreeMap<ObjectRef, u64>,
|
|
pub measure_cache: crate::source_layout::Cache,
|
|
pub snapshot_visited: usize,
|
|
pub snapshot_reused: usize,
|
|
}
|
|
|
|
impl Presentation {
|
|
/// 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。
|
|
pub fn observe_changes(&mut self, vm: &Vm, changes: &ChangeBatch) {
|
|
// 先检查粗粒度对象版本，layout 优先于 paint；每类只记录第一个失效项用于诊断。
|
|
// 对象已经释放时版本查询失败，也视作失效，而非继续使用旧缓存。
|
|
if let Some((phase, object, version)) = self
|
|
.layout_reads
|
|
.iter()
|
|
.map(|(object, version)| ("layout", object, version))
|
|
.chain(
|
|
self.paint_reads
|
|
.iter()
|
|
.map(|(object, version)| ("paint", object, version)),
|
|
)
|
|
.find(|(_, object, version)| vm.change_version(**object).ok() != Some(**version))
|
|
{
|
|
self.force_frame = true;
|
|
self.dependency_invalidations = self.dependency_invalidations.saturating_add(1);
|
|
let kind = vm
|
|
.object(*object)
|
|
.map(|value| value.payload().kind_name())
|
|
.unwrap_or("released");
|
|
self.last_invalid_dependency = format!(
|
|
"{phase} {kind} {object}: {version} -> {:?}",
|
|
vm.change_version(*object).ok()
|
|
);
|
|
}
|
|
// 再核对名称级依赖，避免仅凭对象版本漏掉名称解析路径上的变化。
|
|
// 两个检查独立执行，因此同次观察可能分别增加计数，后者诊断可覆盖前者。
|
|
if let Some((phase, dependency)) = self
|
|
.layout_names
|
|
.iter()
|
|
.map(|dependency| ("layout", dependency))
|
|
.chain(
|
|
self.paint_names
|
|
.iter()
|
|
.map(|dependency| ("paint", dependency)),
|
|
)
|
|
.find(|(_, dependency)| !vm.object_store().read_dependency_valid(dependency))
|
|
{
|
|
self.force_frame = true;
|
|
self.dependency_invalidations = self.dependency_invalidations.saturating_add(1);
|
|
let name = match dependency {
|
|
endor_core::ReadDependency::Name { name, .. } => name.as_str(),
|
|
_ => "<dictionary kind>",
|
|
};
|
|
self.last_invalid_dependency = format!("{phase} name {}:{name}", dependency.object());
|
|
}
|
|
// 把同一批 VM 写入交给视觉快照缓存，源布局/绘制依赖与原生快照依赖分别维护。
|
|
self.render_cache.invalidate(ChangeBatch {
|
|
changes: changes.changes.clone(),
|
|
rescan_required: changes.rescan_required,
|
|
});
|
|
}
|
|
|
|
/// 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。
|
|
pub fn invalidate(
|
|
&mut self,
|
|
cx: &mut NativeContext<'_>,
|
|
affected: &std::collections::HashSet<ObjectRef>,
|
|
reason: &str,
|
|
) -> Result<(), VmError> {
|
|
// 仅绘制失效不影响测量；其余原因清除测量结果并按 Block ID 使布局缓存失效。
|
|
if reason != "paint" {
|
|
self.measure_cache.invalidate(affected);
|
|
for block in affected {
|
|
self.layout.invalidate(&block.to_string());
|
|
}
|
|
}
|
|
// 内容变化还可能改变组成结构，因此显式失效视觉快照及其父链；其他原因不额外做此传播。
|
|
if reason == "content" {
|
|
self.render_cache
|
|
.invalidate_objects(affected.iter().copied());
|
|
}
|
|
// 仅当受影响 Block 在该窗口有活动出现时强制刷新，避免无关窗口重复发帧。
|
|
for weak in self.mounts.active.values() {
|
|
if let Some(mount) = cx.upgrade(*weak)?
|
|
&& affected.contains(
|
|
&cx.store()
|
|
.payload::<crate::mount::Mount>(mount, "Mount")?
|
|
.block,
|
|
)
|
|
{
|
|
self.force_frame = true;
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
/// 用桌面与标签注册表身份初始化窗口状态，布局和视觉缓存从空状态开始。
|
|
// 这里只初始化窗口级缓存，不创建 VM、不复制业务对象；active/pending 留空等待窗口展示请求。
|
|
pub fn new(desktop: ObjectRef, tabs: ObjectRef) -> Self {
|
|
Self {
|
|
desktop,
|
|
closing: false,
|
|
tabs,
|
|
active: None,
|
|
pending: None,
|
|
last_snapshot: None,
|
|
tab_ids: Vec::new(),
|
|
next_tab: 0,
|
|
last_tabs: Vec::new(),
|
|
surface: crate::page::Surface::default(),
|
|
render_cache: crate::snapshot::RenderCache::default(),
|
|
layout: crate::layout::LayoutRuntime::default(),
|
|
mounts: crate::mount::MountTable::default(),
|
|
published_version: 0,
|
|
force_frame: false,
|
|
paint_names: Vec::new(),
|
|
layout_names: Vec::new(),
|
|
paint_reads: std::collections::BTreeMap::new(),
|
|
dependency_invalidations: 0,
|
|
last_invalid_dependency: String::new(),
|
|
layout_reads: std::collections::BTreeMap::new(),
|
|
measure_cache: crate::source_layout::Cache::default(),
|
|
snapshot_visited: 0,
|
|
snapshot_reused: 0,
|
|
}
|
|
}
|
|
}
|
|
|
|
/// 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。
|
|
pub(crate) fn split_reads(
|
|
reads: Vec<endor_core::ReadDependency>,
|
|
) -> (
|
|
std::collections::BTreeMap<ObjectRef, u64>,
|
|
Vec<endor_core::ReadDependency>,
|
|
) {
|
|
let mut objects = std::collections::BTreeMap::new();
|
|
let mut names = Vec::new();
|
|
// 整对象依赖按身份收集到有序表，重复项以最后一次版本为准；其余精确依赖保持原记录。
|
|
for dependency in reads {
|
|
match dependency {
|
|
endor_core::ReadDependency::Object { object, version } => {
|
|
objects.insert(object, version);
|
|
}
|
|
dependency => names.push(dependency),
|
|
}
|
|
}
|
|
(objects, names)
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
use crate::{layout::Size, ui_bridge::UiKind};
|
|
#[test]
|
|
/// 同VM中两Presentation分别布局共享树，尺寸/出现身份独立；读观察可追踪共享对象但不能增添GC根。
|
|
fn independent_view_geometry_and_shared_vm_reads_do_not_add_roots() {
|
|
// 测试在同一 VM 中建立两个 Presentation，验证各自布局尺寸/出现 ID 独立，读取依赖共享业务对象。
|
|
let mut vm = Vm::new().unwrap();
|
|
let mut left = Presentation::new(vm.new_object().unwrap(), vm.new_dict().unwrap());
|
|
let mut right = Presentation::new(vm.new_object().unwrap(), vm.new_dict().unwrap());
|
|
left.layout.viewport = Some(Size {
|
|
width: 100.0,
|
|
height: 80.0,
|
|
});
|
|
right.layout.viewport = Some(Size {
|
|
width: 200.0,
|
|
height: 160.0,
|
|
});
|
|
let root = UiNode {
|
|
surface: None,
|
|
flex: 0.0,
|
|
flex_policy: crate::layout::FlexPolicy::default(),
|
|
main_align: crate::layout::MainAlign::Start,
|
|
cross_align: crate::layout::CrossAlign::Start,
|
|
align_self: None,
|
|
margin: crate::layout::Insets::default(),
|
|
sizing: crate::box_model::Sizing::default(),
|
|
padding_edges: [None; 4],
|
|
border: crate::layout::Insets::default(),
|
|
border_color: "#D8DCE2".into(),
|
|
clip_children: false,
|
|
block_id: "shared".into(),
|
|
protocol_key: "rect".into(),
|
|
slots: Vec::new(),
|
|
interactive: false,
|
|
pointer_events: false,
|
|
kind: UiKind::Rect {
|
|
width: 500.0,
|
|
height: 500.0,
|
|
radius: 0.0,
|
|
color: "#237A45".into(),
|
|
},
|
|
};
|
|
let left_frame = left.layout.frame(&root).unwrap();
|
|
let right_frame = right.layout.frame(&root).unwrap();
|
|
assert_eq!(left_frame.mounts[0].width, 100.0);
|
|
assert_eq!(right_frame.mounts[0].width, 200.0);
|
|
left.layout.clear_occurrences();
|
|
let new_left = left.layout.frame(&root).unwrap();
|
|
let same_right = right.layout.frame(&root).unwrap();
|
|
assert_ne!(new_left.mounts[0].id, left_frame.mounts[0].id);
|
|
assert_eq!(same_right.mounts[0].id, right_frame.mounts[0].id);
|
|
let shared = vm.new_object().unwrap();
|
|
let version = vm.change_version(shared).unwrap();
|
|
left.paint_reads.insert(shared, version);
|
|
right.layout_reads.insert(shared, version);
|
|
vm.set_attr(shared, "value", endor_core::Value::Bool(true))
|
|
.unwrap();
|
|
let changes = vm.take_changes();
|
|
left.observe_changes(&vm, &changes);
|
|
right.observe_changes(&vm, &changes);
|
|
assert!(left.force_frame && right.force_frame);
|
|
// 最后释放业务对象并回收：两份读取记录都不应成为托管根，弱引用应升级失败。
|
|
let weak = vm.downgrade(shared).unwrap();
|
|
vm.release(shared).unwrap();
|
|
vm.collect_cycles();
|
|
assert!(vm.upgrade(weak).unwrap().is_none());
|
|
}
|
|
}
|