mirror of
https://github.com/open-webui/open-webui.git
synced 2026-09-19 00:03:21 +00:00
250 lines
8.3 KiB
Svelte
250 lines
8.3 KiB
Svelte
<script lang="ts">
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import DOMPurify from 'dompurify';
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import { getContext, onDestroy, onMount, tick } from 'svelte';
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import type { Readable } from 'svelte/store';
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import { clampDocumentTargetPage } from '$lib/utils/documentPreview';
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import Spinner from './Spinner.svelte';
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type I18n = {
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t: (key: string, values?: Record<string, unknown>) => string;
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};
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const i18n = getContext<Readable<I18n>>('i18n');
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export let data: ArrayBuffer | null = null;
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export let className = '';
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export let targetPage: number | null = null;
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let outerContainer: HTMLDivElement;
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let containerEl: HTMLDivElement;
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let styleEl: HTMLDivElement;
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let fallbackHtml = '';
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let error = '';
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let loading = false;
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let renderId = 0;
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let mounted = false;
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let fitScale = 1;
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let zoomLevel = 1;
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let resizeObserver: ResizeObserver | null = null;
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$: docxScale = Math.max(0.25, fitScale * zoomLevel);
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const clearPreview = () => {
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if (containerEl) containerEl.innerHTML = '';
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if (styleEl) styleEl.innerHTML = '';
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fallbackHtml = '';
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error = '';
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};
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const updateFitScale = () => {
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const page = containerEl?.querySelector('section.docx') as HTMLElement | null;
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if (!outerContainer || !page) {
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fitScale = 1;
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return;
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}
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const computedWidth = parseFloat(getComputedStyle(page).width);
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const pageWidth = Number.isFinite(computedWidth)
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? computedWidth
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: page.getBoundingClientRect().width / docxScale;
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const availableWidth = Math.max(320, outerContainer.clientWidth - 32);
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fitScale = Math.min(1, availableWidth / pageWidth);
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};
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const zoomIn = () => {
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zoomLevel = Math.min(4, zoomLevel * 1.25);
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};
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const zoomOut = () => {
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zoomLevel = Math.max(0.25, zoomLevel * 0.8);
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};
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const handleWheel = (e: WheelEvent) => {
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if (!e.ctrlKey && !e.metaKey) return;
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if (!outerContainer) return;
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e.preventDefault();
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const oldScale = docxScale;
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const rect = outerContainer.getBoundingClientRect();
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const pointerX = e.clientX - rect.left + outerContainer.scrollLeft;
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const pointerY = e.clientY - rect.top + outerContainer.scrollTop;
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const factor = Math.exp(-e.deltaY * 0.002);
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zoomLevel = Math.max(0.25, Math.min(4, zoomLevel * factor));
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void tick().then(() => {
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const ratio = docxScale / oldScale;
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outerContainer.scrollLeft = pointerX * ratio - (e.clientX - rect.left);
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outerContainer.scrollTop = pointerY * ratio - (e.clientY - rect.top);
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});
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};
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export const resetView = () => {
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zoomLevel = 1;
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updateFitScale();
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};
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const scrollToTargetPage = async () => {
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if (!containerEl) return;
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const pages = containerEl.querySelectorAll('section.docx');
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const page = clampDocumentTargetPage(targetPage, pages.length);
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if (!page) return;
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await tick();
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(pages[page - 1] as HTMLElement | undefined)?.scrollIntoView({ block: 'start' });
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};
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const renderDocx = async (arrayBuffer: ArrayBuffer | null) => {
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const currentRender = ++renderId;
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clearPreview();
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zoomLevel = 1;
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if (!arrayBuffer || !containerEl || !styleEl) return;
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loading = true;
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await tick();
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try {
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const { renderAsync } = await import('docx-preview');
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if (currentRender !== renderId) return;
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await renderAsync(arrayBuffer.slice(0), containerEl, styleEl, {
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breakPages: true,
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className: 'docx',
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ignoreLastRenderedPageBreak: false,
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inWrapper: true,
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renderEndnotes: true,
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renderFooters: true,
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renderFootnotes: true,
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renderHeaders: true,
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useBase64URL: true
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});
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await tick();
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updateFitScale();
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await scrollToTargetPage();
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} catch (e) {
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console.error('Error rendering DOCX preview:', e);
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try {
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const { docxToHtml } = await import('$lib/utils/docxToHtml');
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if (currentRender !== renderId) return;
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fallbackHtml = DOMPurify.sanitize(await docxToHtml(arrayBuffer.slice(0)));
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} catch (fallbackError) {
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console.error('Error rendering DOCX fallback:', fallbackError);
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error = $i18n.t('Failed to load DOCX file. Please try downloading it instead.');
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}
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} finally {
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if (currentRender === renderId) loading = false;
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}
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};
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$: if (mounted) renderDocx(data);
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$: if (!loading && targetPage && !fallbackHtml) {
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void scrollToTargetPage();
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}
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onMount(() => {
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mounted = true;
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void tick().then(() => {
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if (!outerContainer) return;
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resizeObserver = new ResizeObserver(updateFitScale);
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resizeObserver.observe(outerContainer);
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updateFitScale();
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});
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});
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onDestroy(() => {
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renderId += 1;
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resizeObserver?.disconnect();
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clearPreview();
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});
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</script>
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<div
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class="relative min-h-full bg-transparent [&_.docx-wrapper]:flex [&_.docx-wrapper]:flex-col [&_.docx-wrapper]:items-center [&_.docx-wrapper]:!bg-transparent [&_.docx-wrapper]:pt-4 [&_.docx-wrapper]:pb-14 [&_.docx-wrapper>section.docx]:!mx-auto [&_.docx-wrapper>section.docx]:!mt-0 [&_.docx-wrapper>section.docx]:!mb-1 [&_.docx-wrapper>section.docx]:!bg-white [&_.docx-wrapper>section.docx]:!shadow-[0_1px_4px_rgba(0,0,0,0.18)] [&_.docx-wrapper>section.docx]:[zoom:var(--docx-scale)] {className}"
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style="--docx-scale: {docxScale};"
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>
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<div bind:this={styleEl}></div>
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{#if loading}
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<div class="absolute inset-0 flex items-center justify-center bg-white/70 dark:bg-gray-950/60">
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<Spinner className="size-4" />
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</div>
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{/if}
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{#if error}
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<div class="text-red-500 text-sm p-4">{error}</div>
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{:else if fallbackHtml}
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<div bind:this={outerContainer} class="h-full overflow-auto overscroll-contain">
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<div
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class="max-w-[51rem] min-h-[66rem] my-4 mx-auto py-14 px-16 bg-white text-gray-900 shadow rounded-sm font-[Calibri,Arial,sans-serif] text-base leading-[1.45] [&_.docx-title]:m-0 [&_.docx-title]:mb-4 [&_.docx-title]:text-3xl [&_.docx-title]:leading-[1.2] [&_.docx-subtitle]:mt-[-0.5rem] [&_.docx-subtitle]:mb-5 [&_.docx-subtitle]:text-xl [&_.docx-subtitle]:text-gray-500 [&_.docx-caption]:text-center [&_.docx-caption]:text-sm [&_.docx-caption]:text-gray-500 [&_p]:mt-0 [&_p]:mb-[0.65rem] [&_img]:block [&_img]:max-w-full [&_img]:h-auto [&_img]:my-3 [&_img]:mx-auto [&_table]:w-full [&_table]:my-3 [&_table]:border-collapse [&_table]:font-[Calibri,Arial,sans-serif] [&_table]:text-[0.95rem] [&_td]:border [&_td]:border-gray-300/70 [&_td]:px-2 [&_td]:py-1.5 [&_td]:align-top [&_th]:border [&_th]:border-gray-300/70 [&_th]:px-2 [&_th]:py-1.5 [&_th]:align-top [&_blockquote]:my-4 [&_blockquote]:border-l-[3px] [&_blockquote]:border-gray-300 [&_blockquote]:pl-4 [&_blockquote]:text-gray-700"
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>
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<!-- eslint-disable-next-line svelte/no-at-html-tags -->
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{@html fallbackHtml}
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</div>
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</div>
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{:else}
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<div
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bind:this={outerContainer}
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class="h-full overflow-auto overscroll-contain"
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on:wheel|nonpassive={handleWheel}
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>
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<div bind:this={containerEl}></div>
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</div>
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{/if}
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{#if !loading && !error && data && !fallbackHtml}
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<div
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class="absolute bottom-3 left-1/2 -translate-x-1/2 z-10 flex items-center gap-0.5 rounded-lg bg-white/90 dark:bg-gray-850/90 backdrop-blur-sm shadow-lg border border-gray-200/60 dark:border-gray-700/60 px-1 py-0.5"
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>
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<button
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type="button"
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class="shrink-0 min-w-7 h-7 inline-flex items-center justify-center p-1.5 rounded-md hover:bg-gray-100 dark:hover:bg-gray-800 transition text-gray-500 dark:text-gray-400"
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on:click={zoomOut}
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aria-label={$i18n.t('Zoom out')}
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>
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<svg
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xmlns="http://www.w3.org/2000/svg"
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viewBox="0 0 20 20"
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fill="currentColor"
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class="size-3.5"
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>
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<path
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fill-rule="evenodd"
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d="M4 10a.75.75 0 0 1 .75-.75h10.5a.75.75 0 0 1 0 1.5H4.75A.75.75 0 0 1 4 10Z"
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clip-rule="evenodd"
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/>
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</svg>
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</button>
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<button
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type="button"
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class="shrink-0 min-w-12 h-7 px-1.5 py-1 text-center text-[0.6875rem] font-normal text-gray-500 dark:text-gray-400 rounded-md hover:bg-gray-100 dark:hover:bg-gray-800 transition tabular-nums"
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on:click={resetView}
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aria-label={$i18n.t('Reset zoom')}
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>
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{Math.round(zoomLevel * 100)}%
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</button>
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<button
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type="button"
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class="shrink-0 min-w-7 h-7 inline-flex items-center justify-center p-1.5 rounded-md hover:bg-gray-100 dark:hover:bg-gray-800 transition text-gray-500 dark:text-gray-400"
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on:click={zoomIn}
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aria-label={$i18n.t('Zoom in')}
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>
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<svg
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xmlns="http://www.w3.org/2000/svg"
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viewBox="0 0 20 20"
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fill="currentColor"
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class="size-3.5"
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>
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<path
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d="M10.75 4.75a.75.75 0 0 0-1.5 0v4.5h-4.5a.75.75 0 0 0 0 1.5h4.5v4.5a.75.75 0 0 0 1.5 0v-4.5h4.5a.75.75 0 0 0 0-1.5h-4.5v-4.5Z"
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/>
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</svg>
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</button>
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</div>
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{/if}
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</div>
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