feat: support element fontWeight desc

packages/board/src/lib/context.ts

@@ -198,9 +198,9 @@ class Context implements TypeContext {
     }
   }
 
-  setFont(opts: { fontSize: number, fontFamily?: string, fontWeight?: string }): void {
+  setFont(opts: { fontSize: number, fontFamily?: string, fontWeight?: 'bold' }): void {
     const strList: string[] = [];
-    if (opts.fontWeight) {
+    if (opts.fontWeight === 'bold') {
       strList.push(`${opts.fontWeight}`);
     }
     strList.push(`${this._doSize(opts.fontSize || 12)}px`);

packages/core/examples/features/lib/data/text.js

@@ -12,7 +12,8 @@ const data = {
         fontSize: 20,
         color: "#333333",
         text: "生活就像海洋，只有意志坚强的人，才能到达彼岸。",
-        fontFamily: "",
+        fontFamily: '',
+        fontWeight: 'bold',
         borderRadius: 20,
         borderWidth: 2,
         borderColor: "#bd0b64",

packages/core/src/lib/draw/text.ts

@@ -29,6 +29,7 @@ export function drawText(
     ctx.setFillStyle(elem.desc.color);
     ctx.setTextBaseline('top');
     ctx.setFont({
+      fontWeight: desc.fontWeight,
       fontSize: desc.fontSize,
       fontFamily: desc.fontFamily
     });

packages/types/src/lib/element.ts

@@ -40,7 +40,7 @@ type TypeElemDescText = {
   color: string;
   fontSize: number;
   lineHeight?: number;
-  // fontWeight?: string;
+  fontWeight?: 'bold' | '';
   fontFamily?: string;
   textAlign?: 'center' | 'left' | 'right';
   bgColor: string;