mirror of
https://github.com/Ed1s0nZ/CyberStrikeAI.git
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838 lines
34 KiB
JavaScript
838 lines
34 KiB
JavaScript
/**
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* 主对话区智能粘底滚动：流式输出时自动跟随，用户上滑阅读时不抢焦点。
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* 主 POST 流（sendMessage）与刷新后 task-events 补流共用同一策略。
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*/
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(function () {
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'use strict';
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/** 距底部在此范围内才继续自动跟随（宜小，避免“差一点也被拽回去”） */
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const CHAT_SCROLL_FOLLOW_THRESHOLD_PX = 48;
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/** 只有真正到达底部才恢复跟随；2px 用于兼容高分屏的亚像素滚动。 */
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const CHAT_SCROLL_FOLLOW_RESUME_THRESHOLD_PX = 2;
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/** 到达此范围视为位于最后一轮 */
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const CHAT_SCROLL_NAV_BOTTOM_THRESHOLD_PX = 120;
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/** 用户上滑后的短暂锁，防止 SSE 与 scroll 事件竞态抢滚动 */
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const DETACH_LOCK_MS = 900;
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/** 刷新恢复会跨越历史消息、过程详情、字体与流订阅等多轮异步布局。 */
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const CONVERSATION_RESTORE_SETTLE_MIN_MS = 3000;
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const CONVERSATION_RESTORE_SETTLE_MAX_MS = 6000;
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const CONVERSATION_RESTORE_STABLE_FRAMES = 12;
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/** @type {'following' | 'detached'} */
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let scrollMode = 'following';
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let scrollFollowRaf = 0;
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let scrollSettleGeneration = 0;
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let conversationRestoreGeneration = 0;
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/** 用户脱离跟随后，下方是否有未读的新输出（不按 SSE 次数计） */
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let hasPendingNewBelow = false;
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let listenersBound = false;
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let lastScrollTop = 0;
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let lastScrollRange = 0;
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let detachLockUntil = 0;
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/** 最近一次由用户发起的滚动意图；布局变化或脚本滚动不得据此恢复粘底。 */
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let userScrollIntentUntil = 0;
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let turnRailRefreshRaf = 0;
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let turnRailSignature = '';
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let activeTurnIndex = -1;
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let turnRailObserver = null;
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let chatMessagesResizeObserver = null;
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let turnPreviewHideTimer = 0;
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function getChatMessagesEl() {
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return document.getElementById('chat-messages');
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}
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function getTurnRailEl() {
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return document.getElementById('chat-turn-rail');
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}
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function getTurnRailMarkersEl() {
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return document.getElementById('chat-turn-rail-markers');
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}
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function getReturnLatestButton() {
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return document.getElementById('chat-return-latest');
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}
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function normalizePreviewText(value) {
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return String(value || '').replace(/\s+/g, ' ').trim();
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}
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function trimPreviewText(value, maxLength) {
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const text = normalizePreviewText(value);
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if (text.length <= maxLength) return text;
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return text.slice(0, Math.max(1, maxLength - 1)).trimEnd() + '…';
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}
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function messagePreviewText(messageEl) {
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if (!messageEl) return '';
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const original = messageEl.dataset ? messageEl.dataset.originalContent : '';
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if (original) return normalizePreviewText(original);
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const bubble = messageEl.querySelector('.assistant-final-result, .message-bubble');
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if (!bubble) return '';
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const clone = bubble.cloneNode(true);
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clone.querySelectorAll('button, .message-copy-btn, .progress-actions, .progress-footer, .process-details-content').forEach(function (el) {
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el.remove();
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});
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return normalizePreviewText(clone.textContent);
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}
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/** 每条用户消息开始一轮，直到下一条用户消息前的助手消息都归入该轮。 */
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function collectConversationTurns() {
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const messagesEl = getChatMessagesEl();
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if (!messagesEl) return [];
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const turns = [];
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let currentTurn = null;
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Array.from(messagesEl.children).forEach(function (messageEl) {
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if (!messageEl.classList || !messageEl.classList.contains('message')) return;
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if (messageEl.classList.contains('user')) {
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currentTurn = { user: messageEl, assistants: [] };
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turns.push(currentTurn);
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return;
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}
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if (currentTurn && messageEl.classList.contains('assistant')) {
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currentTurn.assistants.push(messageEl);
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}
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});
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return turns;
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}
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function localizedTurnLabel(index, question) {
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const number = index + 1;
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const prefix = typeof window.t === 'function'
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? window.t('chat.turnNumber', { number: number })
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: '第 ' + number + ' 轮';
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const safePrefix = prefix && prefix !== 'chat.turnNumber' ? prefix : ('第 ' + number + ' 轮');
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return question ? safePrefix + '：' + question : safePrefix;
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}
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function turnPreviewData(turn, index) {
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const question = trimPreviewText(messagePreviewText(turn && turn.user), 100)
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|| localizedTurnLabel(index, '');
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const assistants = turn && turn.assistants ? turn.assistants : [];
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let assistant = null;
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for (let i = assistants.length - 1; i >= 0; i--) {
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if (!assistants[i].classList.contains('progress-message')) {
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assistant = assistants[i];
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break;
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}
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}
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if (!assistant && assistants.length) assistant = assistants[assistants.length - 1];
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let summary = trimPreviewText(messagePreviewText(assistant), 220);
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if (!summary) {
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summary = typeof window.t === 'function' ? window.t('chat.turnPending') : '正在处理…';
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if (!summary || summary === 'chat.turnPending') summary = '正在处理…';
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}
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return { question: question, summary: summary };
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}
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function hideTurnPreview() {
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if (turnPreviewHideTimer) {
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window.clearTimeout(turnPreviewHideTimer);
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turnPreviewHideTimer = 0;
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}
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const preview = document.getElementById('chat-turn-rail-preview');
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if (preview) preview.hidden = true;
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}
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function scheduleHideTurnPreview() {
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if (turnPreviewHideTimer) window.clearTimeout(turnPreviewHideTimer);
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turnPreviewHideTimer = window.setTimeout(hideTurnPreview, 160);
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}
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function showTurnPreview(marker, index) {
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if (turnPreviewHideTimer) {
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window.clearTimeout(turnPreviewHideTimer);
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turnPreviewHideTimer = 0;
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}
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const preview = document.getElementById('chat-turn-rail-preview');
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const title = document.getElementById('chat-turn-rail-preview-title');
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const summary = document.getElementById('chat-turn-rail-preview-summary');
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const turn = collectConversationTurns()[index];
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if (!preview || !title || !summary || !marker || !turn) return;
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const data = turnPreviewData(turn, index);
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title.textContent = data.question;
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summary.textContent = data.summary;
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preview.hidden = false;
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const markerRect = marker.getBoundingClientRect();
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const previewRect = preview.getBoundingClientRect();
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const left = Math.min(markerRect.right + 18, window.innerWidth - previewRect.width - 12);
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const desiredTop = markerRect.top + markerRect.height / 2 - previewRect.height / 2;
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const top = Math.max(12, Math.min(desiredTop, window.innerHeight - previewRect.height - 12));
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preview.style.left = Math.max(12, left) + 'px';
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preview.style.top = top + 'px';
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}
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function setActiveTurnMarker(index) {
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const markersEl = getTurnRailMarkersEl();
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if (!markersEl) return;
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const markers = Array.from(markersEl.querySelectorAll('.chat-turn-rail-marker'));
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if (!markers.length) return;
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const nextIndex = Math.max(0, Math.min(index, markers.length - 1));
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markers.forEach(function (marker, markerIndex) {
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const active = markerIndex === nextIndex;
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marker.classList.toggle('is-active', active);
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if (active) marker.setAttribute('aria-current', 'step');
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else marker.removeAttribute('aria-current');
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});
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markers[markers.length - 1].classList.toggle('has-pending-new', hasPendingNewBelow);
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if (activeTurnIndex !== nextIndex) {
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activeTurnIndex = nextIndex;
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const activeMarker = markers[nextIndex];
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const markerTop = activeMarker.offsetTop;
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const markerBottom = markerTop + activeMarker.offsetHeight;
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if (markerTop < markersEl.scrollTop) {
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markersEl.scrollTop = Math.max(0, markerTop - 8);
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} else if (markerBottom > markersEl.scrollTop + markersEl.clientHeight) {
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markersEl.scrollTop = markerBottom - markersEl.clientHeight + 8;
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}
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}
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}
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function updateTurnRailActive() {
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const messagesEl = getChatMessagesEl();
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const turns = collectConversationTurns();
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if (!messagesEl || !turns.length) return;
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if (isNearBottom(CHAT_SCROLL_NAV_BOTTOM_THRESHOLD_PX)) {
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setActiveTurnMarker(turns.length - 1);
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return;
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}
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const readingLine = messagesEl.scrollTop + messagesEl.clientHeight * 0.34;
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let index = 0;
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for (let i = 0; i < turns.length; i++) {
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if (turns[i].user.offsetTop <= readingLine) index = i;
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else break;
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}
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setActiveTurnMarker(index);
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}
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function jumpToConversationTurn(index) {
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const messagesEl = getChatMessagesEl();
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const turn = collectConversationTurns()[index];
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if (!messagesEl || !turn || !turn.user) return;
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userScrollIntentUntil = 0;
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setScrollDetached();
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messagesEl.scrollTo({
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top: Math.max(0, turn.user.offsetTop - 20),
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behavior: 'instant'
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});
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rememberScrollPosition(messagesEl);
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setActiveTurnMarker(index);
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hideTurnPreview();
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updateReturnLatestButton();
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}
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function focusTurnMarker(index) {
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const markersEl = getTurnRailMarkersEl();
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const marker = markersEl && markersEl.querySelector('.chat-turn-rail-marker[data-turn-index="' + index + '"]');
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if (marker) marker.focus();
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}
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function rebuildTurnRail(force) {
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const rail = getTurnRailEl();
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const markersEl = getTurnRailMarkersEl();
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if (!rail || !markersEl) return;
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const turns = collectConversationTurns();
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rail.hidden = turns.length === 0;
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if (!turns.length) {
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markersEl.replaceChildren();
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turnRailSignature = '';
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activeTurnIndex = -1;
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hideTurnPreview();
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return;
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}
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const signature = turns.map(function (turn, index) {
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return (turn.user.id || ('turn-' + index)) + ':' + messagePreviewText(turn.user);
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}).join('|');
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if (!force && signature === turnRailSignature) {
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updateTurnRailActive();
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return;
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}
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const fragment = document.createDocumentFragment();
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turns.forEach(function (turn, index) {
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const marker = document.createElement('button');
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const question = trimPreviewText(messagePreviewText(turn.user), 88);
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marker.type = 'button';
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marker.className = 'chat-turn-rail-marker';
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marker.dataset.turnIndex = String(index);
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marker.setAttribute('aria-label', localizedTurnLabel(index, question));
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marker.addEventListener('click', function () {
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jumpToConversationTurn(index);
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});
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marker.addEventListener('mouseenter', function () {
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showTurnPreview(marker, index);
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});
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marker.addEventListener('mouseleave', scheduleHideTurnPreview);
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marker.addEventListener('keydown', function (event) {
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if (event.key === 'ArrowDown' || event.key === 'ArrowRight') {
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event.preventDefault();
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focusTurnMarker(Math.min(turns.length - 1, index + 1));
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} else if (event.key === 'ArrowUp' || event.key === 'ArrowLeft') {
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event.preventDefault();
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focusTurnMarker(Math.max(0, index - 1));
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} else if (event.key === 'Home') {
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event.preventDefault();
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focusTurnMarker(0);
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} else if (event.key === 'End') {
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event.preventDefault();
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focusTurnMarker(turns.length - 1);
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}
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});
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fragment.appendChild(marker);
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});
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markersEl.replaceChildren(fragment);
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turnRailSignature = signature;
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activeTurnIndex = -1;
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updateTurnRailActive();
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}
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function scheduleTurnRailRefresh(force) {
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cancelAnimationFrame(turnRailRefreshRaf);
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turnRailRefreshRaf = requestAnimationFrame(function () {
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rebuildTurnRail(force === true);
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});
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}
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function streamBelongsToVisibleConversation(stream) {
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if (!stream || !stream.active) return false;
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const visibleConversationId = typeof window.currentConversationId === 'string'
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? window.currentConversationId.trim()
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: '';
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const streamConversationId = typeof stream.conversationId === 'string'
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? stream.conversationId.trim()
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: '';
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// 新建对话在后端返回 conversationId 前，两边都为空，仍属于当前界面。
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if (!streamConversationId) return !visibleConversationId;
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return streamConversationId === visibleConversationId;
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}
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/** 只有当前可见对话的主 POST 流 / task-events 补流才视为「正在输出」 */
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function isStreamActive() {
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try {
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const live = window.__csAgentLiveStream;
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if (streamBelongsToVisibleConversation(live)) return true;
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const replay = window.__csTaskEventStream;
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return streamBelongsToVisibleConversation(replay);
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} catch (e) {
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return false;
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}
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}
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function isVisibleConversationTaskActive() {
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if (isStreamActive()) return true;
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try {
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const visibleConversationId = typeof window.currentConversationId === 'string'
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? window.currentConversationId.trim()
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: '';
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if (!visibleConversationId) return false;
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const taskChecker = typeof window.isConversationTaskRunning === 'function'
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? window.isConversationTaskRunning
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: (typeof isConversationTaskRunning === 'function' ? isConversationTaskRunning : null);
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return !!(taskChecker && taskChecker(visibleConversationId));
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} catch (e) {
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return false;
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}
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}
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function scrollRange(el) {
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return Math.max(0, el.scrollHeight - el.clientHeight);
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}
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function rememberScrollPosition(el) {
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lastScrollTop = el.scrollTop;
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lastScrollRange = scrollRange(el);
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}
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function distanceFromBottom(el) {
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if (!el) return 0;
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return scrollRange(el) - el.scrollTop;
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}
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function isNearBottom(thresholdPx) {
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const el = getChatMessagesEl();
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if (!el) return true;
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return distanceFromBottom(el) <= thresholdPx;
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}
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function isChatMessagesPinnedToBottom() {
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return isNearBottom(CHAT_SCROLL_NAV_BOTTOM_THRESHOLD_PX);
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}
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/** 已在底部时恢复 following（解决：手动滚到底但 scrollMode 仍为 detached） */
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function resumeFollowingIfAtBottom(thresholdPx, userInitiated) {
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if (!userInitiated && Date.now() < detachLockUntil) return false;
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const threshold = Number.isFinite(Number(thresholdPx))
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? Math.max(0, Number(thresholdPx))
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: CHAT_SCROLL_FOLLOW_RESUME_THRESHOLD_PX;
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if (!isNearBottom(threshold)) return false;
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// detached 是用户明确上滑后的阅读状态。布局变化、流式增高和模式切换
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// 即使让视口暂时接近底部，也不能自行恢复；只有用户明确向下滚到底才恢复。
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if (scrollMode === 'detached') {
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if (!userInitiated) return false;
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setScrollFollowing();
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}
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return true;
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}
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function captureScrollPinState() {
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if (Date.now() < detachLockUntil) return false;
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return scrollMode === 'following';
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}
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function setScrollFollowing() {
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scrollMode = 'following';
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getChatMessagesEl()?.classList.add('is-following-latest');
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detachLockUntil = 0;
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userScrollIntentUntil = 0;
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hasPendingNewBelow = false;
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updateTurnRailState();
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}
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function markPendingNewBelow() {
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if (scrollMode !== 'detached') return;
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hasPendingNewBelow = true;
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updateTurnRailState();
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}
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function setScrollDetached() {
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scrollMode = 'detached';
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getChatMessagesEl()?.classList.remove('is-following-latest');
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detachLockUntil = Date.now() + DETACH_LOCK_MS;
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cancelAnimationFrame(scrollFollowRaf);
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scrollFollowRaf = 0;
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scrollSettleGeneration += 1;
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conversationRestoreGeneration += 1;
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if (isStreamActive()) {
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hasPendingNewBelow = true;
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}
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updateTurnRailState();
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}
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function scrollChatToBottomInstant() {
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if (scrollMode !== 'following') return;
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const el = getChatMessagesEl();
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if (!el) return;
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const bottom = scrollRange(el);
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if (bottom - el.scrollTop > CHAT_SCROLL_FOLLOW_RESUME_THRESHOLD_PX) {
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el.scrollTo({ top: bottom, behavior: 'instant' });
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rememberScrollPosition(el);
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}
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}
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function updateTurnRailState() {
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updateTurnRailActive();
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updateReturnLatestButton();
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}
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function updateReturnLatestButton() {
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const button = getReturnLatestButton();
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const messagesEl = getChatMessagesEl();
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if (!button || !messagesEl) return;
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const scrollable = messagesEl.scrollHeight > messagesEl.clientHeight + 2;
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const shouldShow = scrollable && !isNearBottom(CHAT_SCROLL_FOLLOW_RESUME_THRESHOLD_PX);
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const streaming = shouldShow && isVisibleConversationTaskActive();
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button.hidden = !shouldShow;
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button.classList.toggle('is-streaming', streaming);
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button.classList.toggle('has-pending-new', shouldShow && hasPendingNewBelow);
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}
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function isolateReturnLatestPointerEvent(event) {
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if (!event) return;
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// 该按钮会在点击后立即隐藏。阻止指针事件继续冒泡，避免长历史对话中
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// 按钮隐藏与底部审批卡片重排发生在同一帧时产生点击穿透。
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event.stopPropagation();
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}
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function onReturnLatestClick(event) {
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if (event) {
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event.preventDefault();
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event.stopPropagation();
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}
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forceScrollChatToBottom();
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const button = getReturnLatestButton();
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if (button) button.blur();
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}
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function canAutoScrollNow(wasPinnedBeforeDomUpdate) {
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if (Date.now() < detachLockUntil) return false;
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if (scrollMode === 'detached') return false;
|
||
if (wasPinnedBeforeDomUpdate === true) return true;
|
||
return isNearBottom(CHAT_SCROLL_FOLLOW_THRESHOLD_PX);
|
||
}
|
||
|
||
function scheduleChatScrollToBottomIfFollowing(wasPinnedBeforeDomUpdate) {
|
||
if (!canAutoScrollNow(wasPinnedBeforeDomUpdate)) {
|
||
markPendingNewBelow();
|
||
return;
|
||
}
|
||
if (scrollFollowRaf) return;
|
||
scrollFollowRaf = requestAnimationFrame(function () {
|
||
scrollFollowRaf = 0;
|
||
scrollChatToBottomInstant();
|
||
});
|
||
}
|
||
|
||
/**
|
||
* 长详情恢复/终态对账会跨多个 requestAnimationFrame 分批增高 DOM。
|
||
* 单次滚底可能早于最后一批节点；在仍处于 following 时连续若干帧校准，
|
||
* 用户一旦主动上滑进入 detached，后续帧立即停止，避免抢回阅读位置。
|
||
*/
|
||
function settleChatToBottomIfFollowing(frameCount) {
|
||
const frames = Number.isFinite(Number(frameCount))
|
||
? Math.max(1, Math.min(30, Math.floor(Number(frameCount))))
|
||
: 12;
|
||
const generation = ++scrollSettleGeneration;
|
||
|
||
function settleFrame(remaining) {
|
||
if (generation !== scrollSettleGeneration) return;
|
||
if (scrollMode !== 'following' || Date.now() < detachLockUntil) return;
|
||
scrollChatToBottomInstant();
|
||
if (remaining > 1) {
|
||
requestAnimationFrame(function () {
|
||
settleFrame(remaining - 1);
|
||
});
|
||
}
|
||
}
|
||
|
||
requestAnimationFrame(function () {
|
||
settleFrame(frames);
|
||
});
|
||
}
|
||
|
||
/**
|
||
* 刷新恢复长会话时，消息、详情和审批卡会跨多帧继续增高。
|
||
* 批次与审批恢复完成时沿用当前跟随状态。用户可以在此之前开始阅读历史。
|
||
*/
|
||
function settleConversationRestoreToBottom(frameCount) {
|
||
if (!captureScrollPinState()) return;
|
||
const requestedFrames = Number.isFinite(Number(frameCount))
|
||
? Math.max(1, Math.floor(Number(frameCount)))
|
||
: 30;
|
||
const minimumDuration = Math.max(
|
||
CONVERSATION_RESTORE_SETTLE_MIN_MS,
|
||
Math.ceil(requestedFrames * (1000 / 60))
|
||
);
|
||
const generation = ++conversationRestoreGeneration;
|
||
const startedAt = Date.now();
|
||
let lastHeight = -1;
|
||
let stableFrames = 0;
|
||
|
||
function settleRestoreFrame() {
|
||
if (generation !== conversationRestoreGeneration) return;
|
||
// wheel / touch / keyboard / scrollbar drag 会进入 detached；立即尊重用户阅读位置。
|
||
if (scrollMode !== 'following' || Date.now() < detachLockUntil) return;
|
||
const el = getChatMessagesEl();
|
||
if (!el) return;
|
||
|
||
scrollChatToBottomInstant();
|
||
const currentHeight = el.scrollHeight;
|
||
if (currentHeight === lastHeight && isNearBottom(1)) {
|
||
stableFrames += 1;
|
||
} else {
|
||
stableFrames = 0;
|
||
}
|
||
lastHeight = currentHeight;
|
||
|
||
const elapsed = Date.now() - startedAt;
|
||
const reachedStableMinimum = elapsed >= minimumDuration
|
||
&& stableFrames >= CONVERSATION_RESTORE_STABLE_FRAMES;
|
||
if (!reachedStableMinimum && elapsed < CONVERSATION_RESTORE_SETTLE_MAX_MS) {
|
||
requestAnimationFrame(settleRestoreFrame);
|
||
}
|
||
}
|
||
|
||
requestAnimationFrame(settleRestoreFrame);
|
||
}
|
||
|
||
/** @param {boolean} wasPinned DOM 更新前是否应跟随（由 captureScrollPinState 传入） */
|
||
function scrollChatMessagesToBottomIfPinned(wasPinned) {
|
||
scheduleChatScrollToBottomIfFollowing(wasPinned);
|
||
}
|
||
|
||
function forceScrollChatToBottom() {
|
||
cancelAnimationFrame(scrollFollowRaf);
|
||
scrollFollowRaf = 0;
|
||
setScrollFollowing();
|
||
scrollChatToBottomInstant();
|
||
updateTurnRailState();
|
||
}
|
||
|
||
function onUserSendMessage() {
|
||
forceScrollChatToBottom();
|
||
}
|
||
|
||
function clearAllStreamingMarkers() {
|
||
document.querySelectorAll('.progress-container.is-streaming, .process-details-container.is-streaming').forEach(function (el) {
|
||
el.classList.remove('is-streaming');
|
||
});
|
||
}
|
||
|
||
function markProgressStreaming(active, progressId) {
|
||
if (!active) {
|
||
clearAllStreamingMarkers();
|
||
return;
|
||
}
|
||
if (!progressId) return;
|
||
const progressEl = document.getElementById(progressId);
|
||
const container = progressEl && progressEl.querySelector('.progress-container');
|
||
if (container) container.classList.add('is-streaming');
|
||
}
|
||
|
||
function markProcessDetailsStreaming(active, assistantDomId) {
|
||
if (!active) {
|
||
document.querySelectorAll('.process-details-container.is-streaming').forEach(function (el) {
|
||
el.classList.remove('is-streaming');
|
||
});
|
||
return;
|
||
}
|
||
if (!assistantDomId) return;
|
||
const container = document.getElementById('process-details-' + assistantDomId);
|
||
if (!container) return;
|
||
container.classList.add('is-streaming');
|
||
const timeline = container.querySelector('.progress-timeline');
|
||
if (timeline) timeline.classList.add('expanded');
|
||
}
|
||
|
||
function onStreamEnd() {
|
||
clearAllStreamingMarkers();
|
||
try {
|
||
window.__csTaskEventStream = { active: false, conversationId: null, assistantDomId: null, progressId: null };
|
||
} catch (e) { /* ignore */ }
|
||
scheduleTurnRailRefresh(true);
|
||
updateTurnRailState();
|
||
}
|
||
|
||
/** 刷新后会话 task-events 补流开始时，与 sendMessage 主流程对齐 */
|
||
function onTaskEventStreamBegin(conversationId, assistantDomId, progressId) {
|
||
try {
|
||
window.__csTaskEventStream = {
|
||
active: true,
|
||
conversationId: conversationId || null,
|
||
assistantDomId: assistantDomId || null,
|
||
progressId: progressId || null
|
||
};
|
||
} catch (e) { /* ignore */ }
|
||
markProcessDetailsStreaming(true, assistantDomId);
|
||
resumeFollowingIfAtBottom();
|
||
scheduleTurnRailRefresh();
|
||
updateTurnRailState();
|
||
}
|
||
|
||
function onTaskEventStreamEnd() {
|
||
onStreamEnd();
|
||
}
|
||
|
||
function applyMessageScrollOption(options) {
|
||
scheduleTurnRailRefresh();
|
||
const opt = (options && options.scroll) || 'follow';
|
||
if (opt === 'none') return;
|
||
if (opt === 'force') {
|
||
forceScrollChatToBottom();
|
||
return;
|
||
}
|
||
scheduleChatScrollToBottomIfFollowing(captureScrollPinState());
|
||
}
|
||
|
||
/** 手动展开详情时同步滚动，随后记录位置供滚动事件区分用户拖动。 */
|
||
function scrollElementIntoViewIfFollowing(el) {
|
||
const messagesEl = getChatMessagesEl();
|
||
if (!el || !messagesEl || !captureScrollPinState()) return;
|
||
el.scrollIntoView({ behavior: 'instant', block: 'nearest' });
|
||
rememberScrollPosition(messagesEl);
|
||
updateTurnRailState();
|
||
}
|
||
|
||
function onChatMessagesScroll() {
|
||
const el = getChatMessagesEl();
|
||
if (!el) return;
|
||
|
||
const st = el.scrollTop;
|
||
const range = scrollRange(el);
|
||
const topChange = st - lastScrollTop;
|
||
// 原生滚动条可能不派发指针事件。移动超出布局变化能够解释的距离时，
|
||
// 也视为用户滚动。脚本主动定位后会同步记录位置。
|
||
const hasUserScrollIntent = Date.now() <= userScrollIntentUntil ||
|
||
Math.abs(topChange) > Math.abs(range - lastScrollRange) + 1;
|
||
const scrolledUp = topChange < -1 && range - st > CHAT_SCROLL_FOLLOW_RESUME_THRESHOLD_PX;
|
||
const scrolledDown = topChange > 1;
|
||
lastScrollTop = st;
|
||
lastScrollRange = range;
|
||
|
||
if (scrolledUp && hasUserScrollIntent) {
|
||
setScrollDetached();
|
||
} else if (scrolledDown && hasUserScrollIntent) {
|
||
resumeFollowingIfAtBottom(CHAT_SCROLL_FOLLOW_RESUME_THRESHOLD_PX, true);
|
||
}
|
||
updateTurnRailState();
|
||
}
|
||
|
||
function nestedTimelineCanScroll(target, direction) {
|
||
const timeline = target?.closest?.('.progress-timeline.expanded');
|
||
if (!timeline || scrollRange(timeline) <= CHAT_SCROLL_FOLLOW_RESUME_THRESHOLD_PX) return false;
|
||
return direction < 0
|
||
? timeline.scrollTop > CHAT_SCROLL_FOLLOW_RESUME_THRESHOLD_PX
|
||
: distanceFromBottom(timeline) > CHAT_SCROLL_FOLLOW_RESUME_THRESHOLD_PX;
|
||
}
|
||
|
||
function bindChatScrollListeners() {
|
||
if (listenersBound) return;
|
||
const el = getChatMessagesEl();
|
||
if (!el) return;
|
||
listenersBound = true;
|
||
el.classList.toggle('is-following-latest', scrollMode === 'following');
|
||
rememberScrollPosition(el);
|
||
|
||
el.addEventListener('wheel', function (e) {
|
||
// 只有内层到达边界后，滚轮才会传给外层对话区。
|
||
if (nestedTimelineCanScroll(e.target, e.deltaY)) return;
|
||
if (Math.abs(e.deltaY) > 1) {
|
||
userScrollIntentUntil = Date.now() + 1200;
|
||
}
|
||
if (e.deltaY < -1) {
|
||
setScrollDetached();
|
||
}
|
||
}, { passive: true });
|
||
|
||
// 拖动原生纵向滚动条不会产生 wheel；先记录指针意图，再由 scroll 事件确认方向。
|
||
el.addEventListener('pointerdown', function (e) {
|
||
const rect = el.getBoundingClientRect();
|
||
if (e.clientX >= rect.right - 18) {
|
||
userScrollIntentUntil = Date.now() + 1800;
|
||
}
|
||
}, { passive: true });
|
||
|
||
el.addEventListener('keydown', function (e) {
|
||
const scrollKeys = ['ArrowUp', 'PageUp', 'Home', 'ArrowDown', 'PageDown', 'End', ' '];
|
||
if (e.defaultPrevented || !scrollKeys.includes(e.key)) return;
|
||
const upwards = e.key === 'ArrowUp' || e.key === 'PageUp' || e.key === 'Home' || (e.key === ' ' && e.shiftKey);
|
||
if (nestedTimelineCanScroll(e.target, upwards ? -1 : 1)) return;
|
||
userScrollIntentUntil = Date.now() + 1200;
|
||
if (upwards) {
|
||
setScrollDetached();
|
||
}
|
||
});
|
||
|
||
el.addEventListener('touchmove', function (e) {
|
||
if (e.touches && e.touches.length === 1) {
|
||
const y = e.touches[0].clientY;
|
||
const delta = (el._csTouchLastY ?? y) - y;
|
||
el._csTouchLastY = y;
|
||
if (nestedTimelineCanScroll(e.target, delta)) return;
|
||
userScrollIntentUntil = Date.now() + 1200;
|
||
if (delta < -4) {
|
||
setScrollDetached();
|
||
}
|
||
}
|
||
}, { passive: true });
|
||
el.addEventListener('touchstart', function (e) {
|
||
if (e.touches && e.touches.length) {
|
||
el._csTouchLastY = e.touches[0].clientY;
|
||
}
|
||
}, { passive: true });
|
||
el.addEventListener('touchend', function () {
|
||
el._csTouchLastY = null;
|
||
}, { passive: true });
|
||
|
||
el.addEventListener('scroll', onChatMessagesScroll, { passive: true });
|
||
|
||
const returnLatestButton = getReturnLatestButton();
|
||
if (returnLatestButton) {
|
||
returnLatestButton.addEventListener('pointerdown', isolateReturnLatestPointerEvent);
|
||
returnLatestButton.addEventListener('pointerup', isolateReturnLatestPointerEvent);
|
||
returnLatestButton.addEventListener('click', onReturnLatestClick);
|
||
}
|
||
|
||
const turnPreview = document.getElementById('chat-turn-rail-preview');
|
||
if (turnPreview) {
|
||
turnPreview.addEventListener('mouseenter', function () {
|
||
if (turnPreviewHideTimer) {
|
||
window.clearTimeout(turnPreviewHideTimer);
|
||
turnPreviewHideTimer = 0;
|
||
}
|
||
});
|
||
turnPreview.addEventListener('mouseleave', scheduleHideTurnPreview);
|
||
}
|
||
|
||
if (typeof MutationObserver === 'function') {
|
||
turnRailObserver = new MutationObserver(function () {
|
||
scheduleTurnRailRefresh();
|
||
// 最终回复会替换消息气泡内部 HTML，任务详情也会在子树内持续增高。
|
||
// 只在仍处于 following 时按帧合并粘底；用户上滑后的 detached 状态不受影响。
|
||
if (scrollMode === 'following' && Date.now() >= detachLockUntil) {
|
||
scheduleChatScrollToBottomIfFollowing(true);
|
||
}
|
||
});
|
||
turnRailObserver.observe(el, { childList: true, subtree: true, characterData: true });
|
||
}
|
||
|
||
if (typeof ResizeObserver === 'function') {
|
||
chatMessagesResizeObserver = new ResizeObserver(function () {
|
||
// 顶部运行任务条、输入框或视口变化会改变消息区 clientHeight，
|
||
// 但不会触发消息子树 MutationObserver。跟随模式下需重新精确粘底。
|
||
if (scrollMode === 'following' && Date.now() >= detachLockUntil) {
|
||
scheduleChatScrollToBottomIfFollowing(true);
|
||
} else {
|
||
updateTurnRailState();
|
||
}
|
||
});
|
||
chatMessagesResizeObserver.observe(el);
|
||
}
|
||
|
||
window.addEventListener('resize', function () {
|
||
hideTurnPreview();
|
||
if (scrollMode === 'following' && Date.now() >= detachLockUntil) {
|
||
scheduleChatScrollToBottomIfFollowing(true);
|
||
} else {
|
||
updateTurnRailState();
|
||
}
|
||
}, { passive: true });
|
||
}
|
||
|
||
function initChatScroll() {
|
||
bindChatScrollListeners();
|
||
const el = getChatMessagesEl();
|
||
if (el) rememberScrollPosition(el);
|
||
scheduleTurnRailRefresh(true);
|
||
updateTurnRailState();
|
||
}
|
||
|
||
window.CyberStrikeChatScroll = {
|
||
init: initChatScroll,
|
||
onUserSendMessage: onUserSendMessage,
|
||
onStreamEnd: onStreamEnd,
|
||
onTaskEventStreamBegin: onTaskEventStreamBegin,
|
||
onTaskEventStreamEnd: onTaskEventStreamEnd,
|
||
captureScrollPinState: captureScrollPinState,
|
||
scheduleScroll: scheduleChatScrollToBottomIfFollowing,
|
||
scrollIfPinned: scrollChatMessagesToBottomIfPinned,
|
||
settleToBottomIfFollowing: settleChatToBottomIfFollowing,
|
||
settleConversationRestoreToBottom: settleConversationRestoreToBottom,
|
||
forceScrollToBottom: forceScrollChatToBottom,
|
||
applyMessageScroll: applyMessageScrollOption,
|
||
scrollIntoViewIfFollowing: scrollElementIntoViewIfFollowing,
|
||
isPinnedToBottom: isChatMessagesPinnedToBottom,
|
||
markProgressStreaming: markProgressStreaming,
|
||
markProcessDetailsStreaming: markProcessDetailsStreaming,
|
||
setScrollFollowing: setScrollFollowing,
|
||
setScrollDetached: setScrollDetached,
|
||
refreshReturnLatest: updateReturnLatestButton,
|
||
refreshTurnRail: function () { scheduleTurnRailRefresh(true); },
|
||
};
|
||
|
||
window.isChatMessagesPinnedToBottom = isChatMessagesPinnedToBottom;
|
||
window.captureScrollPinState = captureScrollPinState;
|
||
window.scrollChatMessagesToBottomIfPinned = scrollChatMessagesToBottomIfPinned;
|
||
|
||
if (document.readyState === 'loading') {
|
||
document.addEventListener('DOMContentLoaded', initChatScroll);
|
||
} else {
|
||
initChatScroll();
|
||
}
|
||
})();
|