refactor: break down & clean up

src/components/md-deck/hooks/layer-parser.ts

@@ -0,0 +1,57 @@
+import type { Layer, LayerConfig } from '../types';
+
+/**
+ * 解析 layers 字符串 "body:1,7-5,8 title:1,1-5,1"
+ */
+export function parseLayers(layersStr: string): Layer[] {
+  if (!layersStr) return [];
+
+  const layers: Layer[] = [];
+  const regex = /(\w+):(\d+),(\d+)-(\d+),(\d+)/g;
+  let match;
+
+  while ((match = regex.exec(layersStr)) !== null) {
+    layers.push({
+      prop: match[1],
+      x1: parseInt(match[2]),
+      y1: parseInt(match[3]),
+      x2: parseInt(match[4]),
+      y2: parseInt(match[5])
+    });
+  }
+
+  return layers;
+}
+
+/**
+ * 格式化 layers 为字符串
+ */
+export function formatLayers(layers: LayerConfig[]): string {
+  return layers
+    .filter(l => l.visible)
+    .map(l => `${l.prop}:${l.x1},${l.y1}-${l.x2},${l.y2}`)
+    .join(' ');
+}
+
+/**
+ * 初始化图层配置
+ */
+export function initLayerConfigs(
+  data: any[],
+  existingLayersStr: string
+): LayerConfig[] {
+  const parsed = parseLayers(existingLayersStr);
+  const allProps = Object.keys(data[0] || {}).filter(k => k !== 'label');
+  
+  return allProps.map(prop => {
+    const existing = parsed.find(l => l.prop === prop);
+    return {
+      prop,
+      visible: !!existing,
+      x1: existing?.x1 || 1,
+      y1: existing?.y1 || 1,
+      x2: existing?.x2 || 2,
+      y2: existing?.y2 || 2
+    };
+  });
+}