@meta2d/core/src/pen/plugin.js

@meta2d/core: Powerful, Beautiful, Simple, Open - Web-Based 2D At Its Best .

// 该文件为penPlugin的相关文件
/**
 * @description 闭包 重写 pen的生命周期，为了追加回调函数
 * @return 生命周期操作函数，可在原生命周期回调函数基础上进行执行多个函数，可通过传参，设置函数的增加和删除，类似addEventListener 和 removeEventListener
 * @bug 漏洞：后面的生命周期无法将前面的生命周期需要的参数正确传递
 */
function rewritePenLifeCycle() {
    let funcMap = null;
    let funcPenMap = new WeakMap();
    return (pen, lifeCycle, func, del = false) => {
        if (funcPenMap.has(pen) && funcPenMap.get(pen)) {
            funcMap = funcPenMap.get(pen);
        }
        else {
            funcPenMap.set(pen, funcMap = new Map());
        }
        if (typeof func !== "function")
            return () => {
                console.warn('[rewritePenLifeCycle] warn: not a function ');
            };
        let funcListSet = new Set();
        let originFuncMap = new Map(); // 原始事件回调Map
        if (funcMap.has(lifeCycle) && funcMap.get(lifeCycle)) {
            funcListSet = funcMap.get(lifeCycle);
        }
        else {
            originFuncMap.set(lifeCycle, pen[lifeCycle]);
            funcMap.set(lifeCycle, funcListSet);
        }
        if (del) {
            funcListSet.delete(func);
        }
        else {
            funcListSet.add(func);
        }
        let originLifeCycle = originFuncMap.get(lifeCycle); // 原始事件;
        let rewriteFunc = (...args) => {
            originLifeCycle?.(...args);
            funcListSet.forEach(i => {
                // @ts-ignore
                i(...args);
            });
        };
        pen[lifeCycle] = rewriteFunc;
    };
}
export let setLifeCycleFunc = rewritePenLifeCycle();
/**
 * @description 校验插件*/
export function validationPlugin(plugin) {
    // 校验penPlugin
    if (!plugin.name && !plugin.install) {
        console.error('installPenPlugin Error: Validation Failed');
        return false;
    }
    return true;
}
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