Function blockKeywords

Zhihu-Enhanced.user.js:919–1065

(type)

// 屏蔽指定关键词
function blockKeywords(type) {
    if (!menu_value('menu_blockKeywords')) return
    if (!menu_value('menu_customBlockKeywords') || menu_value('menu_customBlockKeywords').length < 1) return
    switch(type) {
        case 'index':
            blockKeywords_('.Card.TopstoryItem.TopstoryItem-isRecommend', 'Card TopstoryItem TopstoryItem-isRecommend');
            break;
        case 'follow':
            blockKeywords_('.Card.TopstoryItem.TopstoryItem-isFollow', 'Card TopstoryItem TopstoryItem-isFollow');
            break;
        case 'topic':
            blockKeywords_('.List-item.TopicFeedItem', 'List-item TopicFeedItem');
            break;
        case 'people':
            blockKeywords_('.List-item', 'List-item');
            break;
        case 'collection':
            blockKeywords_('.Card.CollectionDetailPageItem', 'Card CollectionDetailPageItem');
            break;
        case 'search':
            blockKeywords_search();
            break;
        case 'comment':
            if (!menu_value('menu_blockKeywordsComment')) return // 如果 [屏蔽关键词 - 评论区] 未启用则跳过
            blockKeywords_comment();
            break;
    }


    function blockKeywords_(className1, className2) {
        // 前几条因为是直接加载的，而不是动态插入网页的，所以需要单独判断
        function blockKeywords_now() {
            if (location.pathname === '/hot') {
                document.querySelectorAll('.HotItem').forEach(function(item1){blockKeywords_1(item1, 'h2.HotItem-title');})
            } else {
                document.querySelectorAll(className1).forEach(function(item1){blockKeywords_1(item1, 'h2.ContentItem-title meta[itemprop="name"], meta[itemprop="headline"]');})
            }
        }

        blockKeywords_now();
        window.addEventListener('urlchange', function(){
            setTimeout(blockKeywords_now, 1000); // 网页 URL 变化后再次执行
        })

        // 这个是监听网页插入事件，用来判断后续网页动态插入的元素
        const callback = (mutationsList, observer) => {
            for (const mutation of mutationsList) {
                for (const target of mutation.addedNodes) {
                    if (target.nodeType != 1) return
                    if (target.className === className2) {blockKeywords_1(target, 'h2.ContentItem-title meta[itemprop="name"], meta[itemprop="headline"]');}
                }
            }
        };
        const observer = new MutationObserver(callback);
        observer.observe(document, { childList: true, subtree: true });
    }