vacro-parser-macro 0.1.7

<style>
    /* --- 核心显示逻辑 (增加 !important 以确保生效) --- */

    /* 默认/英文模式：隐藏中文 */
    .doc-cn {
        display: none !important;
    }
    .doc-en {
        display: block !important;
    }

    /* 中文模式：隐藏英文 */
    body.lang-cn .doc-cn {
        display: block !important;
    }
    body.lang-cn .doc-en {
        display: none !important;
    }

    /* --- 侧边栏联动隐藏 --- */
    /* 隐藏被 JS 标记为不需要显示的侧边栏链接 */
    a.i18n-hidden {
        display: none !important;
    }

    /* --- 按钮样式 (你设计的版本) --- */
    #i18n-toggle {
        width: 80px;
        background: var(--main-background-color);
        border: 1px solid transparent; /* 这里的边框颜色可以微调以匹配不同主题 */
        color: var(--main-color);
        border-radius: 3px; /*稍微调整圆角以更贴合 Rustdoc 风格*/
        cursor: pointer;
        font-family: "Fira Sans", Arial, NanumBarunGothic, sans-serif;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-direction: column;
        margin-left: 10px; /* 给左边一点间距 */
    }
    #i18n-toggle:hover {
        background-color: var(--theme-popup-border); /* 悬浮效果 */
    }
    #i18n-toggle::before {
        display: inline-block;
        width: 18px;
        height: 18px;
        filter: var(--settings-menu-filter);
        margin: 8px; /* 稍微缩小边距 */
        content: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512"><path d="M160 0c17.7 0 32 14.3 32 32l0 32 128 0c17.7 0 32 14.3 32 32s-14.3 32-32 32l-9.6 0-8.4 23.1c-16.4 45.2-41.1 86.5-72.2 122 14.2 8.8 29 16.6 44.4 23.5l50.4 22.4 62.2-140c5.1-11.6 16.6-19 29.2-19s24.1 7.4 29.2 19l128 288c7.2 16.2-.1 35.1-16.2 42.2s-35.1-.1-42.2-16.2l-20-45-157.5 0-20 45c-7.2 16.2-26.1 23.4-42.2 16.2s-23.4-26.1-16.2-42.2l39.8-89.5-50.4-22.4c-23-10.2-45-22.4-65.8-36.4-21.3 17.2-44.6 32.2-69.5 44.7L78.3 380.6c-15.8 7.9-35 1.5-42.9-14.3s-1.5-35 14.3-42.9l34.5-17.3c16.3-8.2 31.8-17.7 46.4-28.3-13.8-12.7-26.8-26.4-38.9-40.9L81.6 224.7c-11.3-13.6-9.5-33.8 4.1-45.1s33.8-9.5 45.1 4.1l10.2 12.2c11.5 13.9 24.1 26.8 37.4 38.7 27.5-30.4 49.2-66.1 63.5-105.4l.5-1.2-210.3 0C14.3 128 0 113.7 0 96S14.3 64 32 64l96 0 0-32c0-17.7 14.3-32 32-32zM416 270.8L365.7 384 466.3 384 416 270.8z"/></svg>');
    }
</style>

<script>
    (function () {
        const STORAGE_KEY = "rustdoc-lang-preference";

        // 1. 获取用户偏好
        function getPreferredLang() {
            const saved = localStorage.getItem(STORAGE_KEY);
            if (saved === "cn" || saved === "en") return saved;
            const userLang = navigator.language || navigator.userLanguage;
            if (userLang && userLang.toLowerCase().startsWith("zh"))
                return "cn";
            return "en";
        }

        // --- 新增：侧边栏处理逻辑 ---
        function updateSidebar(lang) {
            // 查找侧边栏的所有链接
            const sidebarLinks = document.querySelectorAll(
                ".sidebar a, .sidebar-elems a",
            );

            sidebarLinks.forEach((link) => {
                const href = link.getAttribute("href");
                if (!href || !href.startsWith("#")) return;

                const targetId = href.substring(1);
                const targetElem = document.getElementById(targetId);

                if (targetElem) {
                    // 检查标题是否位于特定的语言块中
                    const isEnContext = targetElem.closest(".doc-en");
                    const isCnContext = targetElem.closest(".doc-cn");

                    let shouldHide = false;
                    if (lang === "cn" && isEnContext) shouldHide = true;
                    if (lang === "en" && isCnContext) shouldHide = true;

                    if (shouldHide) {
                        link.classList.add("i18n-hidden");
                    } else {
                        link.classList.remove("i18n-hidden");
                    }
                }
            });
        }

        // 2. 设置语言视图
        function setLang(lang) {
            // 设置 body 类
            if (lang === "cn") {
                document.body.classList.add("lang-cn");
                document.body.classList.remove("lang-en");
            } else {
                document.body.classList.remove("lang-cn");
                document.body.classList.add("lang-en");
            }

            // 更新按钮文字 (增加检查，防止按钮未生成时报错)
            const btnContent = document.getElementById("i18n-toggle-content");
            if (btnContent) {
                btnContent.innerText =
                    lang === "cn" ? "Switch to English" : "切换到 中文";
            }

            // 保存偏好
            localStorage.setItem(STORAGE_KEY, lang);

            // 更新侧边栏
            updateSidebar(lang);
        }

        // 3. 初始化逻辑
        window.addEventListener("DOMContentLoaded", () => {
            const currentLang = getPreferredLang();

            // 查找注入点：优先找 rustdoc-toolbar
            const toolbar =
                document.querySelector(".right-buttons") ||
                document.querySelector("rustdoc-toolbar");

            if (toolbar) {
                const btn = document.createElement("button");
                btn.id = "i18n-toggle";
                btn.title = "Toggle Language / 切换语言"; // 增加鼠标悬浮提示

                const content = document.createElement("span");
                content.id = "i18n-toggle-content";
                content.classList.add("label");

                btn.appendChild(content);
                btn.onclick = () => {
                    const isCn = document.body.classList.contains("lang-cn");
                    setLang(isCn ? "en" : "cn");
                };

                // 插入到工具栏的最前面或最后面
                toolbar.appendChild(btn);
            }

            // 应用初始语言
            setLang(currentLang);
        });
    })();
</script>