A high-performance layout Engine designed for custom UI frameworks, canvas rendering, and headless layout testing.
一款高性能布局引擎，专为自定义 UI 框架、Canvas 渲染和无头布局测试而设计。
Derived from Kronos (Titan of Time) + Belisama (Goddess of Fire & Craft).
断时流火，因文化不同英文名源自克洛诺斯（时间之神）与贝莉萨玛（火与工艺之神）。
npm install @krolis/layoutimport { AbstractNode, Context, Node, setMeasureText, TextNode } from '@krolis/layout';
const text = new TextNode('content', {
borderLeftWidth: 2,
});
const child = new Node({
paddingTop: '10%',
height: 50,
}, [text]);
const root = new Node({
width: 500,
}, [child]);
root.lay({
aw: 10000,
ah: 10000,
}); // Entry 入口
console.log(root.rect); // { x: 0, y: 0, w: 500, h: 100, ... }
console.log(child.rect); // { x: 0, y: 0, w: 500, h: 50, paddingTop: 50, ... }
console.log(text.rect); // { x: 2, y: 0, rects: { x: 2, y: 50, ... } }
/**
* If text measurement is involved,
* please call setMeasureText first to set the font metrics method.
* The measureText method of the Canvas context on the web only returns width and height,
* the baseline must be retrieved from font metrics information.
*/
/**
* 如果涉及到文字测量，请先调用setMeasureText设置字体度量方法。
* web上常见的canvas的context的measureText方法仅返回width和height，baseline需要从字体信息中读取。
*/
setMeasureText((
content: string,
fontFamily: string,
fontSize: number,
lineHeight: number,
fontWeight?: number,
fontStyle?: FontStyle,
letterSpacing?: number,
) => ({ width: number, height: number, baseline: number }));npm run devnpm run testTest cases are adapted from the official Web Platform Tests: https://github.com/web-platform-tests/wpt
Each subdirectory corresponds to a *.spec.ts file wrapped in a describe block. Within these directories, each individual test page is mapped to a corresponding it block within the expect assertions.
测试用例改写自官方 Web Platform Tests：https://github.com/web-platform-tests/wpt
每个子目录对应一个*.spec.ts文件，该文件被封装在describe块中。在这些目录中，每个单独的测试页面都映射到expect断言中相应的it块。
[MIT License]