Function parseDfs

userscripts.js:1870–1900

(node, respMap)

// read：递归提取节点文本
function parseDfs(node, respMap) {
    if (isEmpty(node)) return;

    // console.log("当前节点：", node)
    switch (node.nodeType) {
        // 1、元素节点
        case Node.ELEMENT_NODE:
            // console.log("元素节点： ", node);
            // 根据 host 获取 skip 函数，判断是否需要跳过
            let skipFn = skipStringMap[url.host];
            if (skipFn && skipFn(node)) return;
            // aria 提示信息
            if (node.hasAttribute("aria-label")) processNode(node, textType.ariaLabel, respMap);
            // 按钮与文本域节点
            if (["input", "button", "textarea"].includes(node.tagName.toLowerCase())) {
                if (node.placeholder) processNode(node, textType.placeholder, respMap);
                if (node.value && (node.tagName.toLowerCase() === "button" || ["submit", "button"].includes(node.type))) processNode(node, textType.inputValue, respMap);
            }
            break;
        // 2、文本节点
        case  Node.TEXT_NODE:
            let fn = adapterFnMap[url.host];    // 根据 host 获取 adapter 函数，判断是否需要特殊处理
            isEmpty(fn) ? processNode(node, textType.textContent, respMap) : fn(node, respMap);
            return; // 文本节点无子节点，return
    }
    let child = node.firstChild;
    while (child) {
        parseDfs(child, respMap);
        child = child.nextSibling;
    }
}

function processNode(node, attr, respMap) {
    let text;