773 lines
28 KiB
JavaScript
773 lines
28 KiB
JavaScript
// 文件预览:主弹框(图/视频/PDF/文本/markdown/html/docx/xlsx,大文件降级下载)+
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// 同时再开一个的小窗预览(mini)。PDF 用 PDF.js canvas 渲染以兼容 App WebView，
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// docx/xlsx 走 loadScript 懒加载 vendor。
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// 导出 open*/close* 供 files / 媒体 chip / 粘贴文件 / main 的 Esc 关栈调用;
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// _categorize 也供 media 段判图/视频。反向依赖 downloadFile(media)、logout(auth)。
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import { state } from "./state.js";
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import { $ } from "./dom.js";
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import { humanSize, escapeHtml } from "./format.js";
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import { renderMd, highlightIn } from "./markdown.js";
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import { configureHtmlPreviewFrame } from "./preview_content.js";
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import { logout } from "./auth.js";
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import { downloadFile } from "./media.js";
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// ───── file preview ─────
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const PREVIEW_TEXT_MAX = 2 * 1024 * 1024;
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const PREVIEW_BIN_MAX = 50 * 1024 * 1024;
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const PDFJS_SRC = "/static/vendor/pdfjs/pdf.min.js";
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const PDFJS_WORKER_SRC = "/static/vendor/pdfjs/pdf.worker.min.js";
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const _scriptCache = new Map();
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function loadScript(src) {
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if (_scriptCache.has(src)) return _scriptCache.get(src);
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const p = new Promise((resolve, reject) => {
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const s = document.createElement("script");
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s.src = src;
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s.onload = () => resolve();
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s.onerror = () => { _scriptCache.delete(src); reject(new Error("load failed: " + src)); };
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document.head.appendChild(s);
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});
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_scriptCache.set(src, p);
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return p;
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}
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const _previewBlobUrls = new Set();
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function _trackBlobUrl(blob, mime) {
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const b = mime ? new Blob([blob], { type: mime }) : blob;
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const url = URL.createObjectURL(b);
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_previewBlobUrls.add(url);
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return url;
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}
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function _flushBlobUrls() {
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for (const u of _previewBlobUrls) URL.revokeObjectURL(u);
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_previewBlobUrls.clear();
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}
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const _EXT_GROUPS = {
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image: new Set(["jpg","jpeg","png","gif","webp","bmp","svg","ico"]),
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video: new Set(["mp4","webm","mov","mkv","m4v"]),
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pdf: new Set(["pdf"]),
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md: new Set(["md","markdown"]),
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html: new Set(["html","htm"]),
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text: new Set([
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"txt","log","json","jsonl","yaml","yml","toml","ini","csv","tsv",
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"py","js","mjs","ts","jsx","tsx","go","rs","java","c","cc","cpp","h","hpp",
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"xml","css","scss","sh","bash","zsh","sql","conf","env",
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]),
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docx: new Set(["docx"]),
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xlsx: new Set(["xlsx","xls"]),
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ppt: new Set(["pptx","ppt"]),
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};
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export function _categorize(rel) {
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const m = /\.([a-z0-9]+)$/i.exec(rel);
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const ext = m ? m[1].toLowerCase() : "";
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for (const [cat, set] of Object.entries(_EXT_GROUPS)) if (set.has(ext)) return cat;
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return "fallback";
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}
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let _fpCurrentRel = null;
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let _fpCurrentTaskId = "";
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let _fpCurrentLegacy = false;
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// Markdown / HTML 共用“预览 / 源文件”切换。HTML 在 opaque-origin sandbox iframe
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// 中运行：可执行脚本、加载 HTTPS 资源，但不能读取 zcbot 页面或发起表单/顶层跳转。
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const _textPreviewState = { fp: null, mp: null };
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function _resetTextModes(prefix) {
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_textPreviewState[prefix] = null;
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const modes = $(`${prefix}-modes`);
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if (modes) modes.hidden = true;
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}
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async function _loadPdfJs() {
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await loadScript(PDFJS_SRC);
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if (!window.pdfjsLib || !window.pdfjsLib.getDocument) {
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throw new Error("PDF.js 不可用");
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}
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window.pdfjsLib.GlobalWorkerOptions.workerSrc = PDFJS_WORKER_SRC;
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return window.pdfjsLib;
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}
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function _showSource(body, text) {
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body.className = "body";
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body.innerHTML = "";
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const pre = document.createElement("pre");
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pre.className = "preview-text";
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pre.textContent = text;
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body.appendChild(pre);
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}
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function _showHtml(body, text) {
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body.className = "body html-preview";
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body.innerHTML = "";
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const frame = document.createElement("iframe");
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frame.className = "preview-frame preview-html-frame";
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configureHtmlPreviewFrame(frame, text);
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body.appendChild(frame);
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}
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function _renderTextMode(prefix, mode) {
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const state = _textPreviewState[prefix];
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if (!state) return;
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state.mode = mode;
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const body = $(`${prefix}-body`);
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const previewBtn = $(`${prefix}-mode-preview`);
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const sourceBtn = $(`${prefix}-mode-source`);
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const showingPreview = mode === "preview";
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previewBtn.classList.toggle("active", showingPreview);
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sourceBtn.classList.toggle("active", !showingPreview);
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previewBtn.setAttribute("aria-pressed", String(showingPreview));
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sourceBtn.setAttribute("aria-pressed", String(!showingPreview));
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if (!showingPreview) {
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_showSource(body, state.text);
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} else if (state.cat === "md") {
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body.className = "body";
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body.innerHTML = `<div class="md-render">${renderMd(state.text)}</div>`;
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highlightIn(body);
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} else {
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_showHtml(body, state.text);
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}
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}
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function _showRenderableText(prefix, cat, text) {
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_textPreviewState[prefix] = { cat, text, mode: "preview" };
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$(`${prefix}-modes`).hidden = false;
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_renderTextMode(prefix, "preview");
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}
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// ───── 滚动不穿透 + 图片 Ctrl+滚轮缩放 ─────
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// body 元素在多次预览间复用,故 wheel 监听只在 init 时挂一次(_bindBodyWheel),
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// 缩放目标用 _zoomState 记录,避免每次预览重复 addEventListener 泄漏。
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const _zoomState = new WeakMap(); // bodyEl -> { img, scale, badge, timer }
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function _captureBase(z) {
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const img = z.img;
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if (!z.baseW) {
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z.baseW = img.clientWidth || img.naturalWidth || 0;
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z.baseH = img.clientHeight || img.naturalHeight || 0;
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}
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return z.baseW > 0;
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}
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function _applyZoom(z, hint) {
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const img = z.img;
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if (z.scale === 1) {
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// 复位:还原 CSS 里的 max-width/height:100% 自适应贴合
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img.style.maxWidth = "";
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img.style.maxHeight = "";
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img.style.width = "";
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img.style.height = "";
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img.style.cursor = ""; // 100%:普通箭头(左键不缩放,放大镜会误导)
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} else {
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// 以 scale=1 时的"贴合显示"尺寸为基准,给显式像素尺寸。
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// 不用 CSS zoom:图片是带 max-width/height:100% 的 flex item,zoom 放大后会被
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// 百分比 max 约束重新夹回 → 视觉不变;显式 px + max:none 才真正撑大并让 body 出滚动条。
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if (!_captureBase(z)) return; // 图片还没量到尺寸(未加载完),本次跳过,下次再缩
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img.style.maxWidth = "none";
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img.style.maxHeight = "none";
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img.style.width = Math.round(z.baseW * z.scale) + "px";
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img.style.height = Math.round(z.baseH * z.scale) + "px";
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img.style.cursor = "grab"; // 放大后可左键拖动平移
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}
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z.badge.textContent = hint || (Math.round(z.scale * 100) + "%");
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z.badge.classList.add("show");
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if (z.timer) clearTimeout(z.timer);
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z.timer = setTimeout(() => z.badge.classList.remove("show"), hint ? 1400 : 1000);
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}
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// 给某 body 内的图片接上 Ctrl+滚轮缩放(badge + 双击复位),记录到 _zoomState。
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function _makeImageZoomable(bodyEl, img) {
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_clearZoom(bodyEl);
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const card = bodyEl.closest(".card") || bodyEl;
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const badge = document.createElement("div");
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badge.className = "zoom-badge"; // 挂到 card 而非 body,放大后 body 滚动时徽标不跟着滚走
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card.appendChild(badge);
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const z = { img, scale: 1, badge, timer: null, baseW: 0, baseH: 0 };
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_zoomState.set(bodyEl, z);
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img.draggable = false; // 关掉浏览器原生图片拖拽(否则拖出 ghost image)
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// 图片一加载完就量好贴合尺寸做基准,避免首次缩放时还没渲染量到 0
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if (img.complete) _captureBase(z);
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else img.addEventListener("load", () => _captureBase(z), { once: true });
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img.addEventListener("dblclick", () => {
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if (z.scale === 1) return; // 本来就 100%,无需提示
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z.scale = 1;
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_applyZoom(z, "已复位 · 100%");
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});
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// 放大后左键拖动平移:本质是改 body 的滚动位置(图片此时已撑大、body 可滚)
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let dragging = false, sx = 0, sy = 0, sl = 0, st = 0;
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img.addEventListener("mousedown", (e) => {
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if (e.button !== 0 || z.scale === 1) return; // 仅左键、仅放大态
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e.preventDefault();
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dragging = true;
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sx = e.clientX; sy = e.clientY;
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sl = bodyEl.scrollLeft; st = bodyEl.scrollTop;
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img.style.cursor = "grabbing";
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});
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z._onMove = (e) => {
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if (!dragging) return;
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bodyEl.scrollLeft = sl - (e.clientX - sx);
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bodyEl.scrollTop = st - (e.clientY - sy);
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};
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z._onUp = () => {
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if (!dragging) return;
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dragging = false;
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img.style.cursor = z.scale === 1 ? "" : "grab";
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};
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document.addEventListener("mousemove", z._onMove);
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document.addEventListener("mouseup", z._onUp);
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}
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function _clearZoom(bodyEl) {
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const z = _zoomState.get(bodyEl);
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if (!z) return;
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if (z.timer) clearTimeout(z.timer);
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if (z._onMove) document.removeEventListener("mousemove", z._onMove);
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if (z._onUp) document.removeEventListener("mouseup", z._onUp);
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z.badge.remove();
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_zoomState.delete(bodyEl);
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}
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// 只挂一次:Ctrl+滚轮缩当前图片;否则拦住滚动穿透到背景对话列表。
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function _bindBodyWheel(bodyEl) {
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bodyEl.addEventListener("wheel", (e) => {
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const z = _zoomState.get(bodyEl);
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if (e.ctrlKey) {
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if (!z) return; // 无可缩放图片:不拦,交还浏览器
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e.preventDefault(); // 有图片:吃掉浏览器页面缩放,改缩图片
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z.scale = Math.min(8, Math.max(0.1, +(z.scale * (e.deltaY < 0 ? 1.1 : 1 / 1.1)).toFixed(3)));
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_applyZoom(z);
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return;
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}
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// 非 ctrl:容器不可滚 / 已到边界时阻断,避免冒泡到背景滚动对话列表
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const canScroll = bodyEl.scrollHeight > bodyEl.clientHeight + 1;
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if (!canScroll) { e.preventDefault(); return; }
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const atTop = bodyEl.scrollTop <= 0 && e.deltaY < 0;
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const atBottom = bodyEl.scrollTop + bodyEl.clientHeight >= bodyEl.scrollHeight - 1 && e.deltaY > 0;
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if (atTop || atBottom) e.preventDefault();
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}, { passive: false });
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}
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function _fileDownloadUrl(rel, taskId = "", legacy = false) {
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const base = taskId
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? `/v1/tasks/${encodeURIComponent(taskId)}/files/download`
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: "/v1/files/download";
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return base + "?path=" + encodeURIComponent(rel) + (legacy ? "&legacy=true" : "");
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}
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function _pptPreviewUrl(rel, taskId = "", legacy = false) {
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const base = taskId
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? `/v1/tasks/${encodeURIComponent(taskId)}/files/preview_pdf`
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: "/v1/files/preview_pdf";
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return base + "?path=" + encodeURIComponent(rel) + (legacy ? "&legacy=true" : "");
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}
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export async function openFilePreview(rel, taskId = "", legacy = false) {
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_fpCurrentRel = rel;
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_fpCurrentTaskId = taskId;
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_fpCurrentLegacy = legacy;
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const name = rel.split("/").pop() || rel;
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$("fp-name").textContent = name;
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$("fp-meta").textContent = "";
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const body = $("fp-body");
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_resetTextModes("fp");
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_clearZoom(body);
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body.className = "body center";
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body.innerHTML = `<div class="ph">加载中…</div>`;
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// 让出聊天输入区高度,弹框不遮挡 chat-form(无活动任务时 cf 隐藏,inset = 0)
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const cf = $("chat-form");
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const inset = (cf && cf.offsetParent) ? cf.offsetHeight : 0;
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$("file-preview-modal").style.setProperty("--preview-bottom-inset", inset + "px");
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$("file-preview-modal").classList.add("show");
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// 遮罩铺满整屏后,把输入区抬到遮罩之上继续可用(CSS body.fp-open #chat-form)
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document.body.classList.add("fp-open");
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const cat = _categorize(rel);
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// pptx/ppt:后端转 PDF 再复用现成 PDF iframe(非下载原文件),首次稍候 + 失败回退下载。
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if (cat === "ppt") { await _showPptAsPdf(rel, $("fp-body"), $("fp-meta"), _showFallback, taskId, legacy); return; }
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try {
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const r = await fetch(_fileDownloadUrl(rel, taskId, legacy), {
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headers: { "Authorization": "Bearer " + state.token },
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});
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if (!r.ok) throw new Error("HTTP " + r.status);
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const blob = await r.blob();
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$("fp-meta").textContent = humanSize(blob.size);
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if (cat === "text" || cat === "md" || cat === "html") {
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if (blob.size > PREVIEW_TEXT_MAX) {
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_showFallback(`文件过大 (${humanSize(blob.size)}),请下载查看`);
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return;
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}
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const text = await blob.text();
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if (cat === "md" || cat === "html") _showRenderableText("fp", cat, text);
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else _showText(text);
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return;
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}
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if (blob.size > PREVIEW_BIN_MAX) {
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_showFallback(`文件过大 (${humanSize(blob.size)}),请下载查看`);
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return;
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}
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if (cat === "image") _showImage(blob);
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else if (cat === "video") _showVideo(blob);
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else if (cat === "pdf") await _showPdf(blob);
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else if (cat === "docx") await _showDocx(blob);
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else if (cat === "xlsx") await _showXlsx(blob);
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else _showFallback("暂不支持在线预览此格式,请下载查看");
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} catch (e) {
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if (e.status === 401) { closeFilePreview(); logout(); return; }
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_showFallback("加载失败:" + e.message);
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}
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}
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function _showImage(blob) {
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// SVG 在 <img> 里必须 Content-Type=image/svg+xml 才渲染;下载接口靠服务端
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// mimetypes 猜类型,部分部署环境(Linux)未注册 .svg → octet-stream → 不显示。
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// 这里据扩展名强制纠正,与服务端响应头无关。
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const mime = /\.svg$/i.test(_fpCurrentRel || "") ? "image/svg+xml" : "";
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const url = _trackBlobUrl(blob, mime);
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const body = $("fp-body");
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body.className = "body center";
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body.innerHTML = "";
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const img = document.createElement("img");
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img.className = "preview-img";
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img.src = url;
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body.appendChild(img);
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_makeImageZoomable(body, img);
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}
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function _showVideo(blob) {
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const url = _trackBlobUrl(blob);
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const body = $("fp-body");
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body.className = "body center";
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body.innerHTML = "";
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const v = document.createElement("video");
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v.className = "preview-video";
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v.src = url;
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v.controls = true;
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v.autoplay = true;
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body.appendChild(v);
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}
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const _pdfPreviewStates = new WeakMap();
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function _clearPdfPreview(body) {
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const state = _pdfPreviewStates.get(body);
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if (!state) return;
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state.disposed = true;
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if (state.renderTask) state.renderTask.cancel();
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if (state.loadingTask) state.loadingTask.destroy();
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if (state.resizeObserver) state.resizeObserver.disconnect();
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if (state.onResize) window.removeEventListener("resize", state.onResize);
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if (state.pdf) state.pdf.destroy();
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_pdfPreviewStates.delete(body);
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}
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async function _showPdfIn(body, blob, fallbackFn) {
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_clearPdfPreview(body);
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const state = {
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disposed: false,
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pdf: null,
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loadingTask: null,
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pageNumber: 1,
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zoom: 1,
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renderTask: null,
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renderSeq: 0,
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resizeObserver: null,
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onResize: null,
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};
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_pdfPreviewStates.set(body, state);
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body.className = "body pdf-preview";
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body.innerHTML = `
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<div class="pdf-toolbar">
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<button class="small pdf-prev" type="button" aria-label="上一页" disabled>上一页</button>
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<label>第 <input class="pdf-page" type="number" min="1" value="1" inputmode="numeric" disabled> / <span class="pdf-pages">…</span> 页</label>
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<button class="small pdf-next" type="button" aria-label="下一页" disabled>下一页</button>
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<span class="pdf-toolbar-spacer"></span>
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<button class="small pdf-zoom-out" type="button" aria-label="缩小" disabled>−</button>
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<span class="pdf-zoom">适宽</span>
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<button class="small pdf-zoom-in" type="button" aria-label="放大" disabled>＋</button>
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</div>
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<div class="pdf-viewport"><div class="ph">解析 PDF 中…</div></div>`;
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const viewportHost = body.querySelector(".pdf-viewport");
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const pageInput = body.querySelector(".pdf-page");
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const pagesLabel = body.querySelector(".pdf-pages");
|
||
const zoomLabel = body.querySelector(".pdf-zoom");
|
||
const prev = body.querySelector(".pdf-prev");
|
||
const next = body.querySelector(".pdf-next");
|
||
const zoomOut = body.querySelector(".pdf-zoom-out");
|
||
const zoomIn = body.querySelector(".pdf-zoom-in");
|
||
|
||
const renderPage = async () => {
|
||
if (state.disposed || !state.pdf) return;
|
||
const seq = ++state.renderSeq;
|
||
if (state.renderTask) state.renderTask.cancel();
|
||
const page = await state.pdf.getPage(state.pageNumber);
|
||
if (state.disposed || seq !== state.renderSeq) return;
|
||
const baseViewport = page.getViewport({ scale: 1 });
|
||
const fitScale = Math.max(0.1, (viewportHost.clientWidth - 24) / baseViewport.width);
|
||
const viewport = page.getViewport({ scale: fitScale * state.zoom });
|
||
const outputScale = Math.min(window.devicePixelRatio || 1, 2);
|
||
const canvas = document.createElement("canvas");
|
||
const context = canvas.getContext("2d");
|
||
canvas.className = "pdf-canvas";
|
||
canvas.width = Math.floor(viewport.width * outputScale);
|
||
canvas.height = Math.floor(viewport.height * outputScale);
|
||
canvas.style.width = Math.floor(viewport.width) + "px";
|
||
canvas.style.height = Math.floor(viewport.height) + "px";
|
||
viewportHost.innerHTML = "";
|
||
viewportHost.appendChild(canvas);
|
||
state.renderTask = page.render({
|
||
canvasContext: context,
|
||
viewport,
|
||
transform: outputScale === 1 ? null : [outputScale, 0, 0, outputScale, 0, 0],
|
||
});
|
||
try {
|
||
await state.renderTask.promise;
|
||
} catch (e) {
|
||
if (e && e.name === "RenderingCancelledException") return;
|
||
throw e;
|
||
} finally {
|
||
if (seq === state.renderSeq) state.renderTask = null;
|
||
}
|
||
if (state.disposed || seq !== state.renderSeq) return;
|
||
pageInput.value = String(state.pageNumber);
|
||
prev.disabled = state.pageNumber <= 1;
|
||
next.disabled = state.pageNumber >= state.pdf.numPages;
|
||
zoomLabel.textContent = state.zoom === 1 ? "适宽" : Math.round(state.zoom * 100) + "%";
|
||
viewportHost.scrollTo({ top: 0, left: 0 });
|
||
};
|
||
|
||
const goToPage = (pageNumber) => {
|
||
if (!state.pdf) return;
|
||
state.pageNumber = Math.min(state.pdf.numPages, Math.max(1, pageNumber));
|
||
renderPage().catch((e) => {
|
||
if (state.disposed) return;
|
||
_clearPdfPreview(body);
|
||
fallbackFn("PDF 渲染失败:" + e.message);
|
||
});
|
||
};
|
||
prev.onclick = () => goToPage(state.pageNumber - 1);
|
||
next.onclick = () => goToPage(state.pageNumber + 1);
|
||
pageInput.onchange = () => goToPage(parseInt(pageInput.value, 10) || 1);
|
||
zoomOut.onclick = () => {
|
||
state.zoom = Math.max(0.5, +(state.zoom / 1.25).toFixed(2));
|
||
renderPage().catch((e) => {
|
||
if (state.disposed) return;
|
||
_clearPdfPreview(body);
|
||
fallbackFn("PDF 渲染失败:" + e.message);
|
||
});
|
||
};
|
||
zoomIn.onclick = () => {
|
||
state.zoom = Math.min(3, +(state.zoom * 1.25).toFixed(2));
|
||
renderPage().catch((e) => {
|
||
if (state.disposed) return;
|
||
_clearPdfPreview(body);
|
||
fallbackFn("PDF 渲染失败:" + e.message);
|
||
});
|
||
};
|
||
|
||
try {
|
||
const pdfjsLib = await _loadPdfJs();
|
||
const data = new Uint8Array(await blob.arrayBuffer());
|
||
state.loadingTask = pdfjsLib.getDocument({ data });
|
||
const pdf = await state.loadingTask.promise;
|
||
state.loadingTask = null;
|
||
if (state.disposed || _pdfPreviewStates.get(body) !== state) {
|
||
pdf.destroy();
|
||
return;
|
||
}
|
||
state.pdf = pdf;
|
||
pagesLabel.textContent = String(pdf.numPages);
|
||
pageInput.max = String(pdf.numPages);
|
||
pageInput.disabled = false;
|
||
zoomOut.disabled = false;
|
||
zoomIn.disabled = false;
|
||
await renderPage();
|
||
const rerender = () => {
|
||
if (state.disposed) return;
|
||
renderPage().catch(() => {});
|
||
};
|
||
if (window.ResizeObserver) {
|
||
state.resizeObserver = new ResizeObserver(rerender);
|
||
state.resizeObserver.observe(viewportHost);
|
||
} else {
|
||
state.onResize = rerender;
|
||
window.addEventListener("resize", rerender);
|
||
}
|
||
} catch (e) {
|
||
if (!state.disposed) {
|
||
_clearPdfPreview(body);
|
||
fallbackFn("PDF 预览失败:" + e.message);
|
||
}
|
||
}
|
||
}
|
||
|
||
async function _showPdf(blob) {
|
||
await _showPdfIn($("fp-body"), blob, _showFallback);
|
||
}
|
||
|
||
// pptx/ppt → 后端转 PDF → PDF.js。main / mini 共用各自 body / meta / fallback。
|
||
async function _showPptAsPdf(rel, body, metaEl, fallbackFn, taskId = "", legacy = false) {
|
||
body.className = "body center";
|
||
body.innerHTML = `<div class="ph"><div class="preview-spinner"></div>由 PPT 转换为 PDF · 首次稍候…</div>`;
|
||
if (metaEl) metaEl.textContent = "";
|
||
let r;
|
||
try {
|
||
r = await fetch(_pptPreviewUrl(rel, taskId, legacy), {
|
||
headers: { "Authorization": "Bearer " + state.token },
|
||
});
|
||
} catch (e) {
|
||
fallbackFn("加载失败:" + e.message);
|
||
return;
|
||
}
|
||
if (r.status === 401) { logout(); return; }
|
||
if (!r.ok) {
|
||
let msg = "PPT 在线预览不可用,请下载查看";
|
||
if (r.status === 501) msg = "服务器未装 LibreOffice,无法在线预览 PPT,请下载查看";
|
||
else if (r.status === 500) msg = "PPT 转换失败,请下载原文件查看";
|
||
fallbackFn(msg);
|
||
return;
|
||
}
|
||
const blob = await r.blob();
|
||
if (metaEl) metaEl.textContent = humanSize(blob.size) + " · PDF 预览";
|
||
await _showPdfIn(body, blob, fallbackFn);
|
||
}
|
||
|
||
function _showText(text) { _showSource($("fp-body"), text); }
|
||
|
||
async function _showDocx(blob) {
|
||
const body = $("fp-body");
|
||
body.className = "body center";
|
||
body.innerHTML = `<div class="ph">解析 docx 中…</div>`;
|
||
try {
|
||
await loadScript("/static/vendor/jszip.min.js");
|
||
await loadScript("/static/vendor/docx-preview.min.js");
|
||
} catch (e) {
|
||
_showFallback("docx 解析库加载失败:" + e.message);
|
||
return;
|
||
}
|
||
if (!window.docx || !window.docx.renderAsync) {
|
||
_showFallback("docx 解析库不可用");
|
||
return;
|
||
}
|
||
body.className = "body";
|
||
body.innerHTML = `<div class="docx-host"></div>`;
|
||
try {
|
||
await window.docx.renderAsync(blob, body.querySelector(".docx-host"), null, {
|
||
inWrapper: false,
|
||
ignoreLastRenderedPageBreak: true,
|
||
});
|
||
} catch (e) {
|
||
_showFallback("docx 渲染失败:" + e.message);
|
||
}
|
||
}
|
||
|
||
async function _showXlsx(blob) {
|
||
const body = $("fp-body");
|
||
body.className = "body center";
|
||
body.innerHTML = `<div class="ph">解析表格中…</div>`;
|
||
try {
|
||
await loadScript("/static/vendor/xlsx.full.min.js");
|
||
} catch (e) {
|
||
_showFallback("xlsx 解析库加载失败:" + e.message);
|
||
return;
|
||
}
|
||
if (!window.XLSX || !window.XLSX.read) {
|
||
_showFallback("xlsx 解析库不可用");
|
||
return;
|
||
}
|
||
let wb;
|
||
try {
|
||
const ab = await blob.arrayBuffer();
|
||
wb = window.XLSX.read(ab, { type: "array" });
|
||
} catch (e) {
|
||
_showFallback("xlsx 解析失败:" + e.message);
|
||
return;
|
||
}
|
||
const names = wb.SheetNames || [];
|
||
if (!names.length) { _showFallback("xlsx 内无 sheet"); return; }
|
||
body.className = "body";
|
||
const tabsHtml = names.map((n, i) =>
|
||
`<button class="small xlsx-tab${i===0?" active":""}" data-i="${i}">${escapeHtml(n)}</button>`
|
||
).join("");
|
||
body.innerHTML = `<div class="xlsx-tabs">${tabsHtml}</div><div class="xlsx-sheet" id="fp-xlsx-sheet"></div>`;
|
||
const render = (i) => {
|
||
const ws = wb.Sheets[names[i]];
|
||
$("fp-xlsx-sheet").innerHTML = window.XLSX.utils.sheet_to_html(ws);
|
||
};
|
||
body.querySelectorAll(".xlsx-tab").forEach((btn) => {
|
||
btn.onclick = () => {
|
||
body.querySelectorAll(".xlsx-tab").forEach((b) => b.classList.remove("active"));
|
||
btn.classList.add("active");
|
||
render(parseInt(btn.dataset.i));
|
||
};
|
||
});
|
||
render(0);
|
||
}
|
||
|
||
function _showFallback(msg) {
|
||
const body = $("fp-body");
|
||
body.className = "body center";
|
||
body.innerHTML = "";
|
||
const ph = document.createElement("div");
|
||
ph.className = "ph";
|
||
ph.textContent = msg;
|
||
const br = document.createElement("br");
|
||
const dl = document.createElement("button");
|
||
dl.className = "primary";
|
||
dl.textContent = "下载原文件";
|
||
dl.style.marginTop = "12px";
|
||
dl.onclick = () => { if (_fpCurrentRel) downloadFile(_fpCurrentRel, _fpCurrentTaskId, _fpCurrentLegacy); };
|
||
ph.appendChild(document.createElement("br"));
|
||
ph.appendChild(br);
|
||
ph.appendChild(dl);
|
||
body.appendChild(ph);
|
||
}
|
||
|
||
export function closeFilePreview() {
|
||
$("file-preview-modal").classList.remove("show");
|
||
document.body.classList.remove("fp-open");
|
||
$("file-preview-modal").style.removeProperty("--preview-bottom-inset");
|
||
_clearZoom($("fp-body"));
|
||
_clearPdfPreview($("fp-body"));
|
||
_resetTextModes("fp");
|
||
$("fp-body").innerHTML = "";
|
||
_flushBlobUrls();
|
||
_fpCurrentRel = null;
|
||
_fpCurrentTaskId = "";
|
||
_fpCurrentLegacy = false;
|
||
}
|
||
|
||
let _mpCurrentRel = null;
|
||
const _miniPreviewBlobUrls = new Set();
|
||
function _trackMiniBlobUrl(blob, mime) {
|
||
const b = mime ? new Blob([blob], { type: mime }) : blob;
|
||
const url = URL.createObjectURL(b);
|
||
_miniPreviewBlobUrls.add(url);
|
||
return url;
|
||
}
|
||
function _flushMiniBlobUrls() {
|
||
for (const u of _miniPreviewBlobUrls) URL.revokeObjectURL(u);
|
||
_miniPreviewBlobUrls.clear();
|
||
}
|
||
export function openPasteFilePreview(rel) {
|
||
if ($("file-preview-modal").classList.contains("show")) openMiniFilePreview(rel);
|
||
else openFilePreview(rel);
|
||
}
|
||
async function openMiniFilePreview(rel) {
|
||
_mpCurrentRel = rel;
|
||
const name = rel.split("/").pop() || rel;
|
||
$("mp-name").textContent = name;
|
||
$("mp-meta").textContent = "";
|
||
const body = $("mp-body");
|
||
_resetTextModes("mp");
|
||
_clearZoom(body);
|
||
_clearPdfPreview(body);
|
||
body.className = "body center";
|
||
body.innerHTML = `<div class="ph">加载中…</div>`;
|
||
_flushMiniBlobUrls();
|
||
$("mini-preview-modal").classList.add("show");
|
||
|
||
const cat = _categorize(rel);
|
||
if (cat === "ppt") {
|
||
await _showPptAsPdf(rel, $("mp-body"), $("mp-meta"), _showMiniFallback);
|
||
return;
|
||
}
|
||
try {
|
||
const r = await fetch("/v1/files/download?path=" + encodeURIComponent(rel), {
|
||
headers: { "Authorization": "Bearer " + state.token },
|
||
});
|
||
if (!r.ok) throw new Error("HTTP " + r.status);
|
||
const blob = await r.blob();
|
||
$("mp-meta").textContent = humanSize(blob.size);
|
||
if (cat === "text" || cat === "md" || cat === "html") {
|
||
if (blob.size > PREVIEW_TEXT_MAX) {
|
||
_showMiniFallback(`文件过大 (${humanSize(blob.size)}),请下载查看`);
|
||
return;
|
||
}
|
||
const text = await blob.text();
|
||
if (cat === "md" || cat === "html") _showRenderableText("mp", cat, text);
|
||
else _showSource(body, text);
|
||
return;
|
||
}
|
||
if (blob.size > PREVIEW_BIN_MAX) {
|
||
_showMiniFallback(`文件过大 (${humanSize(blob.size)}),请下载查看`);
|
||
return;
|
||
}
|
||
body.innerHTML = "";
|
||
if (cat === "image") {
|
||
body.className = "body center";
|
||
const img = document.createElement("img");
|
||
img.className = "preview-img";
|
||
const _mime = /\.svg$/i.test(_mpCurrentRel || "") ? "image/svg+xml" : "";
|
||
img.src = _trackMiniBlobUrl(blob, _mime);
|
||
body.appendChild(img);
|
||
_makeImageZoomable(body, img);
|
||
} else if (cat === "video") {
|
||
body.className = "body center";
|
||
const v = document.createElement("video");
|
||
v.className = "preview-video";
|
||
v.src = _trackMiniBlobUrl(blob);
|
||
v.controls = true;
|
||
body.appendChild(v);
|
||
} else if (cat === "pdf") {
|
||
await _showPdfIn(body, blob, _showMiniFallback);
|
||
} else {
|
||
_showMiniFallback("暂不支持小窗预览此格式,请下载查看");
|
||
}
|
||
} catch (e) {
|
||
if (e.status === 401) { closeMiniPreview(); logout(); return; }
|
||
_showMiniFallback("加载失败:" + e.message);
|
||
}
|
||
}
|
||
function _showMiniFallback(msg) {
|
||
const body = $("mp-body");
|
||
body.className = "body center";
|
||
body.innerHTML = "";
|
||
const ph = document.createElement("div");
|
||
ph.className = "ph";
|
||
ph.textContent = msg;
|
||
const dl = document.createElement("button");
|
||
dl.className = "primary";
|
||
dl.textContent = "下载原文件";
|
||
dl.style.marginTop = "12px";
|
||
dl.onclick = () => { if (_mpCurrentRel) downloadFile(_mpCurrentRel); };
|
||
ph.appendChild(document.createElement("br"));
|
||
ph.appendChild(dl);
|
||
body.appendChild(ph);
|
||
}
|
||
export function closeMiniPreview() {
|
||
$("mini-preview-modal").classList.remove("show");
|
||
_clearZoom($("mp-body"));
|
||
_clearPdfPreview($("mp-body"));
|
||
_resetTextModes("mp");
|
||
$("mp-body").innerHTML = "";
|
||
_flushMiniBlobUrls();
|
||
_mpCurrentRel = null;
|
||
}
|
||
// 删文件时:若该 rel 正在主/小预览中则关掉(供 main 的 deletePastedFile 等调用,
|
||
// 不对外暴露内部 current-rel 状态)。
|
||
export function closePreviewIfShowing(rel) {
|
||
if (_fpCurrentRel === rel) closeFilePreview();
|
||
if (_mpCurrentRel === rel) closeMiniPreview();
|
||
}
|
||
|
||
_bindBodyWheel($("fp-body"));
|
||
_bindBodyWheel($("mp-body"));
|
||
|
||
$("fp-close").onclick = closeFilePreview;
|
||
$("fp-download").onclick = () => { if (_fpCurrentRel) downloadFile(_fpCurrentRel, _fpCurrentTaskId, _fpCurrentLegacy); };
|
||
$("fp-mode-preview").onclick = () => _renderTextMode("fp", "preview");
|
||
$("fp-mode-source").onclick = () => _renderTextMode("fp", "source");
|
||
$("file-preview-modal").addEventListener("click", (e) => {
|
||
if (e.target.id === "file-preview-modal") closeFilePreview();
|
||
});
|
||
$("mp-close").onclick = closeMiniPreview;
|
||
$("mp-download").onclick = () => { if (_mpCurrentRel) downloadFile(_mpCurrentRel); };
|
||
$("mp-mode-preview").onclick = () => _renderTextMode("mp", "preview");
|
||
$("mp-mode-source").onclick = () => _renderTextMode("mp", "source");
|
||
$("mini-preview-modal").addEventListener("click", (e) => {
|
||
if (e.target.id === "mini-preview-modal") closeMiniPreview();
|
||
});
|