374 lines
15 KiB
Python
374 lines
15 KiB
Python
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# -*- coding: utf-8 -*-
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"""图表组件配置化渲染引擎（issue #51 / PRD 5.5「⑤ 配置化驾驶舱」）。
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本模块在 ``layout.py``（#50 布局 JSON Schema）之上实现**渲染层适配器**：
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把一份 ``CockpitLayout`` 内存模型，编译成一份与前端框架无关的**渲染计划
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（``RenderPlan``）**——每个 widget 被翻译成一个 ``WidgetRendererSpec``，
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描述它该用哪个前端组件、摆在栅格的哪个位置、绑定什么数据、套用哪套主题
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token、是否启用性能优化策略。
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设计目标（PRD 5.5 验收口径「切换模板零改码」）：
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前端只需一个固定的「组件注册表」+ 一个通用 ``<WidgetHost>``，
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按 ``RenderPlan`` 逐个挂载组件；切换行业模板 = 换一份 ``RenderPlan``，
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**前端代码零改动**。
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本模块不依赖任何第三方库（与 #50 一致，避免引入运行时依赖），只消费
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``cockpit.layout`` 的内存模型，输出可 ``json.dumps`` 的纯数据结构。
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"""
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from __future__ import annotations
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import json
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from dataclasses import dataclass, field
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from typing import Any, Dict, List, Optional, Tuple
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from .layout import ( # 复用 #50 已定义的布局模型与常量
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DEFAULT_GRID_COLUMNS,
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LAYOUT_SCHEMA_ID,
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PERF_WIDGET_THRESHOLD,
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VALID_THEMES,
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VALID_WIDGET_TYPES,
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CockpitLayout,
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Grid,
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Widget,
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validate_layout,
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)
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# ---------------------------------------------------------------------------
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# 主题 token（PRD 5.5「配置点：主题」dark / light 两套调色）
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# ---------------------------------------------------------------------------
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# 工业驾驶舱约定配色：dark 偏深蓝底 + 青绿强调（车间大屏常用）；
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# light 偏白底 + 蓝色强调（白天值班室）。前端按这些 CSS 变量渲染，
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# 切换主题 = 切一套变量，组件代码不动。
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THEME_TOKENS: Dict[str, Dict[str, str]] = {
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"dark": {
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"--cockpit-bg": "#0b1220",
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"--cockpit-surface": "#13203a",
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"--cockpit-fg": "#e6edf6",
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"--cockpit-fg-muted": "#8aa0bd",
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"--cockpit-accent": "#18d3c8", # 青绿（KPI / 趋势主线）
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"--cockpit-warn": "#f5a623", # 告警强调
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"--cockpit-grid-line": "rgba(255,255,255,0.06)",
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},
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"light": {
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"--cockpit-bg": "#f5f7fb",
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"--cockpit-surface": "#ffffff",
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"--cockpit-fg": "#1f2d3d",
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"--cockpit-fg-muted": "#6b7c93",
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"--cockpit-accent": "#2f7af2", # 蓝
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"--cockpit-warn": "#e08600",
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"--cockpit-grid-line": "rgba(0,0,0,0.06)",
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},
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}
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# ---------------------------------------------------------------------------
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# widget type → 前端组件名映射（PRD 5.5 能力清单）
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# ---------------------------------------------------------------------------
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# 前端「组件注册表」的键；``<WidgetHost>`` 据此选择具体组件实现。
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# 命名遵循 Vue3 大驼峰组件约定，便于 ``app.component()`` 注册。
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WIDGET_COMPONENT: Dict[str, str] = {
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"process_view": "ProcessView", # 四状态工艺流程视图（SVG 资源）
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"trend": "TrendChart", # 实时趋势曲线
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"kpi_card": "KpiCard", # KPI 卡片
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"alarm_panel": "AlarmPanel", # 告警面板
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"nl_query": "NlQuery", # 自然语言查询入口
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}
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# 各组件类型向渲染描述里注入的「绑定字段」：来自布局 widget 的哪个属性。
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# 例如 trend 组件的 series 绑定 = widget.bind（点位/指标 ID）。
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_WIDGET_BINDING_SOURCE: Dict[str, Tuple[str, ...]] = {
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"process_view": ("src",), # 流程图资源
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"trend": ("bind",), # 趋势点位/指标
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"kpi_card": ("metric", "label"), # 指标键 + 展示标签
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"alarm_panel": (), # 无特有绑定，订阅告警流即可
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"nl_query": (), # 无特有绑定，固定入口
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}
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# ---------------------------------------------------------------------------
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# 异常
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# ---------------------------------------------------------------------------
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class RenderError(ValueError):
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"""渲染计划生成失败。``render_layout`` 在布局非法或组件缺失时抛出。"""
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# ---------------------------------------------------------------------------
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# 渲染描述符（dataclass）
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# ---------------------------------------------------------------------------
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@dataclass
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class GridPlacement:
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"""单个 widget 在 CSS Grid 中的定位（``grid-column/grid-row`` 语法）。
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PRD 5.5 栅格基线默认 12 列；这里把布局资产里的整数坐标 (x,y,w,h)
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换算成 CSS Grid 的 ``column-start / span`` / ``row-start / span``，
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以及占比百分比（便于非 Grid 容器/截图场景使用）。
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约定（与 #50 schema 一致）：x/y/w/h 为栅格单位，x≥0、y≥0、w>0、h>0。
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"""
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column_start: int # CSS Grid 列起点的 1-based 编号（= x + 1）
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column_span: int # 跨列数（= w）
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row_start: int # CSS Grid 行起点的 1-based 编号（= y + 1）
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row_span: int # 跨行数（= h）
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width_pct: float # 占栅格总宽的百分比（= w / columns * 100，保留 4 位）
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style: str # 直接可用的 ``grid-column/grid-row`` CSS 文本
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def to_dict(self) -> Dict[str, Any]:
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return {
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"columnStart": self.column_start,
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"columnSpan": self.column_span,
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"rowStart": self.row_start,
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"rowSpan": self.row_span,
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"widthPct": self.width_pct,
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"style": self.style,
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}
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@dataclass
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class WidgetRendererSpec:
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"""单个驾驶舱组件的渲染描述符（``<WidgetHost>`` 的单一挂载项）。
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前端渲染约定::
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<component :is="registry[spec.component]" v-bind="spec.props"
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:style="spec.grid.style" :perf="spec.perf" />
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"""
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id: str # 渲染层唯一标识（type + 序号），便于 diff / 虚拟滚动 key
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component: str # 前端组件名（见 ``WIDGET_COMPONENT``）
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type: str # 原始 widget type（调试/审计用）
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grid: GridPlacement
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description: Optional[str] = None
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# 前端组件 props（绑定字段 + 展示参数），按组件类型组装
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props: Dict[str, Any] = field(default_factory=dict)
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# 性能策略：是否对该组件启用虚拟滚动/采样降频/WebWorker（仅 perf 触发时 True）
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perf: Dict[str, bool] = field(default_factory=lambda: {
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"virtualScroll": False,
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"downsample": False,
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"worker": False,
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})
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def to_dict(self) -> Dict[str, Any]:
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return {
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"id": self.id,
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"component": self.component,
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"type": self.type,
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"grid": self.grid.to_dict(),
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"description": self.description,
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"props": dict(self.props),
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"perf": dict(self.perf),
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}
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@dataclass
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class RenderPlan:
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"""整份驾驶舱布局的渲染计划（``<WidgetHost>`` 的总输入）。
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前端拿到本对象即可完成整屏渲染：``themeTokens`` 注入到根容器 CSS 变量，
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``specs`` 逐项挂载组件，``perfFlags`` 控制全局性能策略开关。
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"""
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schema: str # 继承自布局资产的 $schema（审计/版本对齐）
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title: str
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theme: str
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theme_tokens: Dict[str, str] # 该主题下的 CSS 变量（来自 ``THEME_TOKENS``）
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grid_columns: int # 栅格基线（用于前端百分比校验）
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specs: List[WidgetRendererSpec]
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widget_count: int
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# 全局性能标志：组件数 ≥ PERF_WIDGET_THRESHOLD 时为 True（PRD 5.5 复杂仪表盘性能）
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perf_flags: Dict[str, bool] = field(default_factory=lambda: {
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"virtualScroll": False,
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"downsample": False,
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"worker": False,
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})
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perf_hint: Optional[str] = None # 来自 #50 布局校验的人类可读提示（透传）
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def to_dict(self) -> Dict[str, Any]:
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return {
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"$schema": self.schema,
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"title": self.title,
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"theme": self.theme,
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"themeTokens": dict(self.theme_tokens),
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"grid": {"columns": self.grid_columns},
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"widgets": [s.to_dict() for s in self.specs],
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"widgetCount": self.widget_count,
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"perfFlags": dict(self.perf_flags),
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"perfHint": self.perf_hint,
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}
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# ---------------------------------------------------------------------------
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# 栅格换算
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# ---------------------------------------------------------------------------
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def compute_grid_placement(widget: Widget, grid_columns: int) -> GridPlacement:
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"""把布局资产里的栅格整数坐标换算成 CSS Grid 定位 + 占比百分比。
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- CSS Grid 的列/行起点是 1-based，布局资产里的 x/y 是 0-based，
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因此 ``column_start = x + 1``、``row_start = y + 1``。
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- 跨度直接等于 w/h（栅格单位）。
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- 宽度百分比 = w / grid_columns * 100（便于非 Grid 容器降级）。
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"""
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if grid_columns <= 0:
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raise RenderError(f"栅格列数必须 > 0，实际 {grid_columns}")
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column_start = widget.x + 1
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row_start = widget.y + 1
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width_pct = round(widget.w / grid_columns * 100, 4)
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style = (
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f"grid-column: {column_start} / span {widget.w}; "
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f"grid-row: {row_start} / span {widget.h};"
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)
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return GridPlacement(
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column_start=column_start,
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column_span=widget.w,
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row_start=row_start,
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row_span=widget.h,
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width_pct=width_pct,
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style=style,
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)
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# ---------------------------------------------------------------------------
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# 组件 props 组装
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# ---------------------------------------------------------------------------
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def _build_props(widget: Widget) -> Dict[str, Any]:
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"""按 widget type 组装前端组件 props（绑定字段 + 展示参数）。
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绑定字段来源见 ``_WIDGET_BINDING_SOURCE``；缺字段视为该组件不依赖它
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（布局层 #50 已对必填字段做过校验，这里做防御性容错）。
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"""
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props: Dict[str, Any] = {}
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if widget.type == "process_view":
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# 流程图视图：资源名 + 四状态语义（前端按 SVG 内联渲染 + 状态着色）
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props["src"] = widget.src or ""
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props["states"] = ["running", "warning", "alarm", "offline"] # PRD 四状态
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elif widget.type == "trend":
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# 实时趋势：绑定点位/指标 ID，前端订阅时序总线
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props["series"] = widget.bind or ""
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props["window"] = "PT30M" # 默认 30 分钟滚动窗口（可由模板覆盖）
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elif widget.type == "kpi_card":
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# KPI 卡片：指标键 + 标签
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props["metric"] = widget.metric or ""
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props["label"] = widget.label or widget.metric or ""
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elif widget.type == "alarm_panel":
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# 告警面板：固定订阅告警流，无特有绑定
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props["subscribe"] = "alarm_stream"
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elif widget.type == "nl_query":
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# NL 查询入口：固定能力，无特有绑定
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props["placeholder"] = "输入自然语言查询（配方 / 质量 / 能耗）"
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return props
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# ---------------------------------------------------------------------------
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# 渲染入口
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# ---------------------------------------------------------------------------
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def render_widget(
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widget: Widget,
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index: int,
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grid_columns: int,
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perf_enabled: bool = False,
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) -> WidgetRendererSpec:
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"""渲染单个 widget 为 ``WidgetRendererSpec``。
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- ``index`` 用于生成稳定 id（type + 序号），作为虚拟滚动 key。
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- ``perf_enabled`` 为 True（全局性能策略开启）时，trend/alarm_panel 这类
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高频刷新组件启用采样降频 + WebWorker（PRD 5.5）。
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"""
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if widget.type not in WIDGET_COMPONENT:
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# 布局层 #50 已挡住非法 type，这里再防御一次，避免渲染出未注册组件
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raise RenderError(
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f"widget[{index}] type='{widget.type}' 无对应前端组件，"
|
|||
|
|
f"已注册 {list(WIDGET_COMPONENT)}"
|
|||
|
|
)
|
|||
|
|
|
|||
|
|
spec = WidgetRendererSpec(
|
|||
|
|
id=f"{widget.type}-{index}",
|
|||
|
|
component=WIDGET_COMPONENT[widget.type],
|
|||
|
|
type=widget.type,
|
|||
|
|
grid=compute_grid_placement(widget, grid_columns),
|
|||
|
|
description=widget.description,
|
|||
|
|
props=_build_props(widget),
|
|||
|
|
)
|
|||
|
|
|
|||
|
|
if perf_enabled:
|
|||
|
|
# 高频刷新组件才需要逐组件性能策略：趋势曲线 / 告警面板
|
|||
|
|
if widget.type in ("trend", "alarm_panel"):
|
|||
|
|
spec.perf["downsample"] = True
|
|||
|
|
spec.perf["worker"] = True
|
|||
|
|
# 大流程图（process_view）启用虚拟滚动分块
|
|||
|
|
if widget.type == "process_view":
|
|||
|
|
spec.perf["virtualScroll"] = True
|
|||
|
|
|
|||
|
|
return spec
|
|||
|
|
|
|||
|
|
|
|||
|
|
def render_layout(layout: CockpitLayout) -> RenderPlan:
|
|||
|
|
"""把一份合法 ``CockpitLayout`` 编译为 ``RenderPlan``。
|
|||
|
|
|
|||
|
|
先复用 #50 的 ``validate_layout`` 再校验一次（防御构造后被篡改），
|
|||
|
|
再逐 widget 渲染，最后汇总主题 token 与全局性能标志。
|
|||
|
|
|
|||
|
|
校验失败抛 ``RenderError``（包装 #50 的错误清单），便于配置台定位。
|
|||
|
|
"""
|
|||
|
|
# 1) 复用 #50 校验器，确保布局恒为合法资产
|
|||
|
|
result = validate_layout(layout.to_dict())
|
|||
|
|
if not result.ok:
|
|||
|
|
raise RenderError(result.errors)
|
|||
|
|
|
|||
|
|
# 2) 主题 token
|
|||
|
|
if layout.theme not in THEME_TOKENS:
|
|||
|
|
raise RenderError(
|
|||
|
|
f"theme='{layout.theme}' 无调色方案，已支持 {list(THEME_TOKENS)}"
|
|||
|
|
)
|
|||
|
|
theme_tokens = dict(THEME_TOKENS[layout.theme])
|
|||
|
|
|
|||
|
|
# 3) 全局性能标志（PRD 5.5：组件数 ≥ 阈值 → 虚拟滚动 + 采样降频 + WebWorker）
|
|||
|
|
perf_on = result.widget_count >= PERF_WIDGET_THRESHOLD
|
|||
|
|
perf_flags = {
|
|||
|
|
"virtualScroll": perf_on,
|
|||
|
|
"downsample": perf_on,
|
|||
|
|
"worker": perf_on,
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
# 4) 逐 widget 渲染
|
|||
|
|
specs: List[WidgetRendererSpec] = [
|
|||
|
|
render_widget(w, idx, layout.grid.columns, perf_enabled=perf_on)
|
|||
|
|
for idx, w in enumerate(layout.widgets)
|
|||
|
|
]
|
|||
|
|
|
|||
|
|
return RenderPlan(
|
|||
|
|
schema=layout.schema,
|
|||
|
|
title=layout.title,
|
|||
|
|
theme=layout.theme,
|
|||
|
|
theme_tokens=theme_tokens,
|
|||
|
|
grid_columns=layout.grid.columns,
|
|||
|
|
specs=specs,
|
|||
|
|
widget_count=len(specs),
|
|||
|
|
perf_flags=perf_flags,
|
|||
|
|
perf_hint=result.perf_hint,
|
|||
|
|
)
|
|||
|
|
|
|||
|
|
|
|||
|
|
# ---------------------------------------------------------------------------
|
|||
|
|
# 序列化
|
|||
|
|
# ---------------------------------------------------------------------------
|
|||
|
|
|
|||
|
|
|
|||
|
|
def plan_to_dict(plan: RenderPlan) -> Dict[str, Any]:
|
|||
|
|
"""渲染计划 → 可发布的 dict（前端直接消费 / 落盘缓存）。"""
|
|||
|
|
return plan.to_dict()
|
|||
|
|
|
|||
|
|
|
|||
|
|
def plan_to_json(plan: RenderPlan, indent: Optional[int] = 2) -> str:
|
|||
|
|
"""渲染计划 → JSON 字符串（确保 ASCII 安全，中文转义不影响前端解析）。"""
|
|||
|
|
return json.dumps(plan.to_dict(), ensure_ascii=False, indent=indent)
|