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@hy-bricks/canvas

v0.1.1

Published

HyperCard 画布 — 多组件实例编排 / 自由布局 / 拖拽 / 连线 / 属性面板。受控组件,SDK 边界守住:不 fetch / 不知后端 / 不开 Drawer。

Readme

@hy-bricks/canvas

HyperCard 画布 — 多组件实例编排 / 渐进渲染 / 只读渲染器。受控组件,SDK 边界守住:不 fetch / 不知后端 / 不开 Drawer。

version license vue


简介

@hy-bricks/canvas 是 HyperCard 画布 SDK,提供:

  • <HyperCardPageRenderer> — 只读页面渲染器:接受 PageRenderPayload,用 <RuntimeBox> 渲染所有实例,支持 IntersectionObserver 渐进 mount + 视口外缓冲 dispose
  • createRenderScheduler — 渲染调度器 composable:管理实例级 mount/dispose 状态机,与渲染组件解耦
  • 协议类型 — PageDocument / PageRenderPayload / ComponentContract / ComponentVersionKey 等完整类型导出
  • helperisDraftKey() / parseComponentVersionKey() 用于区分正式版本 vs 编辑期草稿

SDK 边界铁律:

  • 不 fetch — 所有数据由宿主通过 props 传入
  • 不知后端 — 不依赖任何特定后端 schema / API
  • 不开 Drawer / Dialog — UI 交互由宿主控制
  • 不绑定 UI 框架 — 不强依赖 Element Plus / Pinia / Monaco

快速开始

pnpm add @hy-bricks/canvas @hy-bricks/core vue
<script setup lang="ts">
import { HyperCardPageRenderer } from '@hy-bricks/canvas'
import type { PageRenderPayload } from '@hy-bricks/canvas'

const payload: PageRenderPayload = {
  page: { id: 'p1', name: 'Demo', targets: ['pc'] },
  version: { version: 'v1', label: 'v1', publishedAt: '2026-05-11T00:00:00Z' },
  document: {
    layout: { type: 'free', canvas: { w: 1920, h: 1080 } },
    instances: [
      {
        instanceId: 'inst-1',
        componentId: 'button',
        componentVersionKey: 'button@v1',
        rect: { x: 100, y: 100, w: 200, h: 60 },
        zIndex: 1,
        props: {},
      },
    ],
    bindings: [],
  },
  componentVersions: {
    'button@v1': {
      key: 'button@v1',
      componentId: 'button',
      version: 'v1',
      status: 'ok',
      source: {
        html: '<el-button @click="say">{{ msg }}</el-button>',
        js: 'export default { data(){ return { msg:"Hi" } }, methods:{ say(){ this.msg="Clicked" } } }',
        css: '',
      },
      contract: {
        propsDecl: [],
        emitsDecl: [],
        methodsDecl: [{ key: 'say', params: [] }],
        slotsDecl: [],
        modelDecl: [],
        dataInputsDecl: [],
        dataOutputsDecl: [],
      },
    },
  },
}
</script>

<template>
  <HyperCardPageRenderer :payload="payload" />
</template>

API 概览

组件:<HyperCardPageRenderer>

只读页面渲染器。接受宿主拼好的 payload 或拆开的 document + sourceMap。

Props:

| Prop | 类型 | 默认值 | 说明 | |---|---|---|---| | payload | PageRenderPayload? | — | /render 端点产物(含 document + componentVersions)。优先使用 | | document | PageDocument? | — | 页面结构(payload 为空时使用,设计器场景) | | componentSourceMap | ComponentSourceMap? | — | 组件版本 source 字典(payload 为空时使用) | | schedulerOptions | RenderSchedulerOptions? | — | 调度器配置(透传给 createRenderScheduler) |

行为:

  • 每个 PageInstance 渲染一个 wrapper div(absolute 定位)+ <RuntimeBox>
  • 视口内:渐进 mount(每 idle frame 最多 N 个)
  • 视口外:缓冲一段(默认 1500ms)后 dispose,滚回来 LRU 命中不重编
  • status !== 'ok' 的实例渲染降级卡,不阻断整页

Composable:createRenderScheduler

渲染调度器 — 管理实例级 pending → mounting → mounted → disposing 状态机。

import { createRenderScheduler } from '@hy-bricks/canvas'

const scheduler = createRenderScheduler({
  rootMargin: '500px',        // 视口缓冲
  disposeDelayMs: 1500,       // 视口外延迟 dispose
  mountConcurrency: 2,        // 每帧最多挂 2 个
})

scheduler.register('inst-1', element)  // 注册实例 + 开始观察
scheduler.unregister('inst-1')         // 停止观察 + 清单实例 state
scheduler.isMounted('inst-1')          // boolean — Vue 模板 reactive 跟踪
scheduler.getState('inst-1')           // MountState — 渲染 RuntimeBox vs skeleton 判别
scheduler.dispose()                    // 全量清理(取消 IO + 清 timer + 清 state),onBeforeUnmount 调

配置(RenderSchedulerOptions):

| 字段 | 类型 | 默认值 | 说明 | |---|---|---|---| | rootMargin | string | '500px' | IntersectionObserver 视口缓冲距离 | | disposeDelayMs | number | 1500 | 视口外多久才真 dispose | | mountConcurrency | number | 2 | 渐进 mount 每帧个数 | | root | Element? | null(viewport) | IntersectionObserver root(画布自有滚动容器时传) |

状态(MountState):

| 状态 | 说明 | |---|---| | pending | 已注册,未进入视口 | | mounting | 已进入视口,排队等 idle frame | | mounted | 已挂载,正在渲染 | | disposing | 已离开视口,缓冲倒计时中 |

协议类型

@hy-bricks/canvas 直接 import,不需要额外装包:

import type {
  // 基础
  Source,
  // ComponentVersionKey
  ComponentVersionKey,
  ParsedComponentVersionKey,
  // ComponentContract(7 字段)
  PropDecl,
  EmitDecl,
  MethodDecl,
  SlotDecl,
  ModelDecl,
  DataInputDecl,
  DataOutputDecl,
  ComponentContract,
  ComponentKind,
  // ComponentVersionAsset
  ComponentVersionStatus,
  ComponentVersionAsset,
  DraftComponentVersionAsset,
  // Page 结构
  PageInstance,
  PageBinding,
  PageLayout,
  PageDocument,
  PageRenderPayload,
  ComponentSourceMap,
  // 版本状态 / 特性开关
  CanvasVersionStatus,
  CanvasFeatures,
  // 组件库面板
  ComponentCatalogItem,
} from '@hy-bricks/canvas'

Helper

import { isDraftKey, parseComponentVersionKey } from '@hy-bricks/canvas'

isDraftKey('button@v3')                  // false
isDraftKey('button@draft:p1:v3')         // true

parseComponentVersionKey('button@v3')
// → { kind: 'published', componentId: 'button', version: 'v3' }

parseComponentVersionKey('button@draft:p1:v3')
// → { kind: 'draft', componentId: 'button', pageId: 'p1',
//     baseVersion: 'v3', baseVersionKey: 'button@v3' }

parseComponentVersionKey('garbage')
// → null

性能特性

得益于 IntersectionObserver 渐进 mount + LRU 编译缓存,在数十到上百个实例的页面上仍能保持流畅:

  • 首屏骨架(skeleton):payload 到达后即出占位框,不阻塞首屏
  • 渐进挂载:视口内实例按 idle frame 节流挂载,避免单帧卡顿
  • 滚动重用:视口外延迟 dispose + 滚回 LRU 命中,组件不重新编译

配合使用 / Ecosystem

License

MIT © hy_top