Function processNode

scripts/injectGeminiCanvasButton.js:749–1149

(node, indent = '')

        // Process all child nodes
        const processNode = (node, indent = '') => {
            // Skip if not a valid node
            if (!node) return;

            // Handle source footnotes (引用上标)
            if (node.nodeType === Node.ELEMENT_NODE && node.tagName === 'SOURCE-FOOTNOTE') {
                // 如果 sourceIndexMap 为空，表示用户不想导出来源，跳过所有引用上标
                if (sourceIndexMap.size === 0) {
                    return;
                }
                const supElement = node.querySelector('sup[data-turn-source-index]');
                if (supElement) {
                    const turnIndex = parseInt(supElement.getAttribute('data-turn-source-index'), 10);
                    const sourceInfo = sourceIndexMap.get(turnIndex);
                    if (sourceInfo) {
                        // 插入可点击的上标链接
                        result += `<sup>[[${sourceInfo.displayIndex}]](#ref-${sourceInfo.displayIndex})</sup>`;
                    }
                    // 如果找不到映射，不输出任何内容（可能是来源列表中不存在的索引）
                }
                return;
            }

            // Handle sources-carousel-inline (跳过来源轮播)
            if (node.nodeType === Node.ELEMENT_NODE && node.tagName === 'SOURCES-CAROUSEL-INLINE') {
                return; // 跳过这个元素
            }

            // Handle response-element wrappers (处理响应元素包装器)
            if (node.nodeType === Node.ELEMENT_NODE && node.tagName === 'RESPONSE-ELEMENT') {
                node.childNodes.forEach(n => processNode(n, indent));
                return;
            }

            // Handle block-level math formulas
            if (node.nodeType === Node.ELEMENT_NODE && node.classList && node.classList.contains('math-block')) {
                // Priority 1: Use data-math attribute
                const dataMath = node.getAttribute('data-math');
                if (dataMath) {
                    // If in a list, add indent to the markers, but not the formula content
                    if (indent) {
                        result += '\n' + indent + '$$\n' + dataMath.trim() + '\n' + indent + '$$\n\n';
                    } else {
                        result += '\n$$\n' + dataMath.trim() + '\n$$\n\n';
                    }
                    return;
                }
                // Priority 2: Try .math-src element
                const mathSrc = node.querySelector('.math-src');
                if (mathSrc && mathSrc.textContent && mathSrc.textContent.trim()) {
                    if (indent) {
                        result += '\n' + indent + '$$\n' + mathSrc.textContent.trim() + '\n' + indent + '$$\n\n';
                    } else {
                        result += '\n$$\n' + mathSrc.textContent.trim() + '\n$$\n\n';
                    }
                    return;
                }
                // Priority 3: Fallback to KaTeX annotation