增加图片导出功能

package-lock.json

@@ -15,6 +15,7 @@
         "@codemirror/view": "^6.36.4",
         "dompurify": "^3.2.5",
         "highlight.js": "^11.11.1",
+        "html2canvas": "^1.4.1",
         "markdown-it": "^14.1.0",
         "markdown-it-multimd-table": "^4.2.3",
         "mermaid": "^11.15.0",
@@ -2878,6 +2879,15 @@
         "node": "18 || 20 || >=22"
       }
     },
+    "node_modules/base64-arraybuffer": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmmirror.com/base64-arraybuffer/-/base64-arraybuffer-1.0.2.tgz",
+      "integrity": "sha512-I3yl4r9QB5ZRY3XuJVEPfc2XhZO6YweFPI+UovAzn+8/hb3oJ6lnysaFcjVpkCPfVWFUDvoZ8kmVDP7WyRtYtQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.6.0"
+      }
+    },
     "node_modules/base64-js": {
       "version": "1.5.1",
       "resolved": "https://registry.npmmirror.com/base64-js/-/base64-js-1.5.1.tgz",
@@ -3406,6 +3416,15 @@
         "node": ">= 8"
       }
     },
+    "node_modules/css-line-break": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmmirror.com/css-line-break/-/css-line-break-2.1.0.tgz",
+      "integrity": "sha512-FHcKFCZcAha3LwfVBhCQbW2nCNbkZXn7KVUJcsT5/P8YmfsVja0FMPJr0B903j/E69HUphKiV9iQArX8SDYA4w==",
+      "license": "MIT",
+      "dependencies": {
+        "utrie": "^1.0.2"
+      }
+    },
     "node_modules/csstype": {
       "version": "3.2.3",
       "resolved": "https://registry.npmmirror.com/csstype/-/csstype-3.2.3.tgz",
@@ -5171,6 +5190,19 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/html2canvas": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmmirror.com/html2canvas/-/html2canvas-1.4.1.tgz",
+      "integrity": "sha512-fPU6BHNpsyIhr8yyMpTLLxAbkaK8ArIBcmZIRiBLiDhjeqvXolaEmDGmELFuX9I4xDcaKKcJl+TKZLqruBbmWA==",
+      "license": "MIT",
+      "dependencies": {
+        "css-line-break": "^2.1.0",
+        "text-segmentation": "^1.0.3"
+      },
+      "engines": {
+        "node": ">=8.0.0"
+      }
+    },
     "node_modules/http-cache-semantics": {
       "version": "4.2.0",
       "resolved": "https://registry.npmmirror.com/http-cache-semantics/-/http-cache-semantics-4.2.0.tgz",
@@ -6802,6 +6834,15 @@
         "node": ">= 10.0.0"
       }
     },
+    "node_modules/text-segmentation": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmmirror.com/text-segmentation/-/text-segmentation-1.0.3.tgz",
+      "integrity": "sha512-iOiPUo/BGnZ6+54OsWxZidGCsdU8YbE4PSpdPinp7DeMtUJNJBoJ/ouUSTJjHkh1KntHaltHl/gDs2FC4i5+Nw==",
+      "license": "MIT",
+      "dependencies": {
+        "utrie": "^1.0.2"
+      }
+    },
     "node_modules/tiny-async-pool": {
       "version": "1.3.0",
       "resolved": "https://registry.npmmirror.com/tiny-async-pool/-/tiny-async-pool-1.3.0.tgz",
@@ -6996,6 +7037,15 @@
       "dev": true,
       "license": "(WTFPL OR MIT)"
     },
+    "node_modules/utrie": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmmirror.com/utrie/-/utrie-1.0.2.tgz",
+      "integrity": "sha512-1MLa5ouZiOmQzUbjbu9VmjLzn1QLXBhwpUa7kdLUQK+KQ5KA9I1vk5U4YHe/X2Ch7PYnJfWuWT+VbuxbGwljhw==",
+      "license": "MIT",
+      "dependencies": {
+        "base64-arraybuffer": "^1.0.2"
+      }
+    },
     "node_modules/uuid": {
       "version": "14.0.0",
       "resolved": "https://registry.npmmirror.com/uuid/-/uuid-14.0.0.tgz",

package.json

@@ -26,6 +26,7 @@
     "@codemirror/view": "^6.36.4",
     "dompurify": "^3.2.5",
     "highlight.js": "^11.11.1",
+    "html2canvas": "^1.4.1",
     "markdown-it": "^14.1.0",
     "markdown-it-multimd-table": "^4.2.3",
     "mermaid": "^11.15.0",

src/renderer/src/App.tsx

@@ -17,7 +17,7 @@ import {
 import { BACKGROUNDS, FONTS, validBackgroundId, validFontId, type ViewMode } from './appearance'
 import type { Tab } from './types'
 import { AppModals } from './AppModals'
-import { clamp, newTab, tabLabel, isDirty, loadViewMode, viewModeLabel, loadPreviewLineHeight, normalizePathKey } from './utils'
+import { clamp, newTab, tabLabel, isDirty, loadViewMode, viewModeLabel, loadPreviewLineHeight, normalizePathKey, exportElementToImageData } from './utils'
 import {
   BG_KEY, FONT_KEY, VIEW_KEY, BROWSE_KEY, SIDEBAR_W_KEY, SIDEBAR_HIDDEN_KEY,
   STATS_W_KEY, STATS_HIDDEN_KEY, SPLIT_KEY, PREVIEW_W_KEY, PREVIEW_LINE_KEY, SESSION_KEY, AUTO_SAVE_KEY
@@ -127,6 +127,13 @@ export default function App(): React.ReactElement {
   const [searchVisible, setSearchVisible] = React.useState(false)
   const [searchQuery, setSearchQuery] = React.useState('')
   const [dragOver, setDragOver] = React.useState(false)
+  const [imagePreviewData, setImagePreviewData] = React.useState<string | null>(null)
+  const [imagePreviewFileName, setImagePreviewFileName] = React.useState('')
+  const [imageScale, setImageScale] = React.useState(1)
+  const [imagePosition, setImagePosition] = React.useState({ x: 0, y: 0 })
+  const [isDragging, setIsDragging] = React.useState(false)
+  const [dragStart, setDragStart] = React.useState({ x: 0, y: 0 })
+  const [isExportingImage, setIsExportingImage] = React.useState(false)
 
   const activeTab = tabs.find((t) => t.id === activeId) ?? null
   const activeDoc = activeTab?.content ?? ''
@@ -997,6 +1004,60 @@ ${previewHtml}
     window.setTimeout(() => setStatusText(''), 2000)
   }, [activeDoc, activeTab, previewHtml])
 
+  const handleExportImage = React.useCallback(async (): Promise<void> => {
+    const articleEl =
+      viewMode === 'read'
+        ? readPreviewArticleRef.current
+        : viewMode === 'live'
+          ? livePreviewArticleRef.current
+          : hybridPreviewArticleRef.current
+    if (!articleEl) {
+      console.error('Article element not found for viewMode:', viewMode)
+      setStatusText('无法获取文档内容')
+      window.setTimeout(() => setStatusText(''), 2000)
+      return
+    }
+    const fileName = `${activeTab?.filePath ? tabLabel(activeTab).replace(/\.\w+$/, '') : 'document'}.png`
+    try {
+      setIsExportingImage(true)
+      const imageData = await exportElementToImageData(articleEl)
+      setImagePreviewData(imageData)
+      setImagePreviewFileName(fileName)
+      setIsExportingImage(false)
+    } catch (error) {
+      console.error('Error exporting image:', error)
+      setIsExportingImage(false)
+      const errorMessage = error instanceof Error ? error.message : '未知错误'
+      setStatusText(`导出图片失败: ${errorMessage}`)
+      window.setTimeout(() => setStatusText(''), 3000)
+    }
+  }, [activeTab, viewMode])
+
+  const handleCloseImagePreview = React.useCallback((): void => {
+    setImagePreviewData(null)
+    setImageScale(1)
+    setImagePosition({ x: 0, y: 0 })
+    setIsExportingImage(false)
+    setIsDragging(false)
+  }, [])
+
+  const handleResetZoom = React.useCallback((): void => {
+    setImageScale(1)
+    setImagePosition({ x: 0, y: 0 })
+  }, [])
+
+  const handleDownloadImage = React.useCallback((): void => {
+    if (!imagePreviewData) return
+    const a = document.createElement('a')
+    a.href = imagePreviewData
+    a.download = imagePreviewFileName
+    document.body.appendChild(a)
+    a.click()
+    document.body.removeChild(a)
+    setStatusText('图片下载成功')
+    window.setTimeout(() => setStatusText(''), 3000)
+  }, [imagePreviewData, imagePreviewFileName])
+
   const deleteFileAt = React.useCallback(
     async (filePath: string): Promise<void> => {
       if (!api) return
@@ -1349,6 +1410,14 @@ ${previewHtml}
         >
           导出 HTML
         </button>
+        <button
+          type="button"
+          onClick={() => void handleExportImage()}
+          disabled={!activeDoc.trim()}
+          title="导出当前文档为图片"
+        >
+          📷 导出图片
+        </button>
         <button
           type="button"
           onClick={() => setAutoSave((v) => !v)}
@@ -1509,6 +1578,46 @@ ${previewHtml}
           </div>
         </div>
       ) : null}
+
+      {isExportingImage && (
+        <div className="image-export-loading">
+          <div className="image-export-loading-spinner"></div>
+          <div className="image-export-loading-text">正在生成图片...</div>
+          <div className="image-export-loading-hint">请稍候</div>
+        </div>
+      )}
+
+      {imagePreviewData && (
+        <div className="image-preview-overlay" onClick={handleCloseImagePreview}>
+          <div className="image-preview-modal" onClick={(e) => e.stopPropagation()}>
+            <div className="image-preview-header">
+              <h3 className="image-preview-title">📷 图片预览</h3>
+              <button
+                className="image-preview-close"
+                onClick={handleCloseImagePreview}
+                title="关闭"
+              >
+                ✕
+              </button>
+            </div>
+            <div className="image-preview-content">
+              <img
+                src={imagePreviewData}
+                alt="预览"
+                className="image-preview-img"
+              />
+            </div>
+            <div className="image-preview-footer">
+              <button
+                className="image-preview-download"
+                onClick={handleDownloadImage}
+              >
+                ⬇ 下载图片
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
     </div>
   )
 }

src/renderer/src/index.css

@@ -2654,3 +2654,253 @@ html[data-bg='22'] .app-root {
   outline: none;
   box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 30%, transparent);
 }
+
+/* 图片导出加载遮罩 */
+.image-export-loading {
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background: rgba(0, 0, 0, 0.85);
+  backdrop-filter: blur(8px);
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  z-index: 1001;
+  animation: loadingFadeIn 0.3s ease-out;
+}
+
+@keyframes loadingFadeIn {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}
+
+.image-export-loading-spinner {
+  width: 60px;
+  height: 60px;
+  border: 4px solid rgba(255, 255, 255, 0.1);
+  border-top-color: #0ea5e9;
+  border-radius: 50%;
+  animation: spin 1s cubic-bezier(0.4, 0, 0.2, 1) infinite;
+  margin-bottom: 24px;
+}
+
+@keyframes spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+.image-export-loading-text {
+  font-size: 20px;
+  font-weight: 600;
+  color: #ffffff;
+  margin-bottom: 8px;
+  animation: loadingPulse 2s ease-in-out infinite;
+}
+
+@keyframes loadingPulse {
+  0%, 100% {
+    opacity: 1;
+  }
+  50% {
+    opacity: 0.6;
+  }
+}
+
+.image-export-loading-hint {
+  font-size: 14px;
+  color: rgba(255, 255, 255, 0.6);
+}
+
+/* 图片预览弹窗 */
+.image-preview-overlay {
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background: rgba(0, 0, 0, 0.75);
+  backdrop-filter: blur(4px);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  z-index: 1000;
+  padding: 24px;
+  animation: overlayFadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
+}
+
+@keyframes overlayFadeIn {
+  from {
+    opacity: 0;
+    backdrop-filter: blur(0px);
+  }
+  to {
+    opacity: 1;
+    backdrop-filter: blur(4px);
+  }
+}
+
+.image-preview-modal {
+  background: #f5f5f5;
+  border-radius: 16px;
+  max-width: 90vw;
+  max-height: 90vh;
+  width: 100%;
+  display: flex;
+  flex-direction: column;
+  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.4);
+  animation: modalSlideUp 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
+}
+
+@keyframes modalSlideUp {
+  from {
+    opacity: 0;
+    transform: translateY(40px) scale(0.95);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0) scale(1);
+  }
+}
+
+.image-preview-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 16px 20px;
+  border-bottom: 1px solid #e5e7eb;
+}
+
+.image-preview-title {
+  margin: 0;
+  font-size: 18px;
+  font-weight: 600;
+  color: #111827;
+}
+
+.image-preview-header-actions {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.image-preview-zoom-out,
+.image-preview-zoom-in,
+.image-preview-reset,
+.image-preview-close {
+  width: 32px;
+  height: 32px;
+  border: 1px solid #e5e7eb;
+  border-radius: 8px;
+  background: #ffffff;
+  color: #111827;
+  cursor: pointer;
+  font-size: 16px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: all 0.2s;
+}
+
+.image-preview-zoom-out:hover,
+.image-preview-zoom-in:hover,
+.image-preview-reset:hover {
+  border-color: #0ea5e9;
+  background: rgba(14, 165, 233, 0.1);
+}
+
+.image-preview-close:hover {
+  border-color: #ef4444;
+  background: rgba(239, 68, 68, 0.1);
+  color: #ef4444;
+}
+
+.image-preview-scale {
+  font-size: 13px;
+  color: #6b7280;
+  min-width: 50px;
+  text-align: center;
+}
+
+.image-preview-content {
+  flex: 1;
+  overflow: auto;
+  padding: 20px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: #f3f4f6;
+}
+
+.image-preview-img {
+  max-width: 100%;
+  max-height: 60vh;
+  width: auto;
+  height: auto;
+  object-fit: contain;
+  border-radius: 12px;
+  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
+  animation: imageFadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) 0.2s both;
+}
+
+@keyframes imageFadeIn {
+  from {
+    opacity: 0;
+    transform: scale(0.98);
+  }
+  to {
+    opacity: 1;
+    transform: scale(1);
+  }
+}
+
+.image-preview-footer {
+  padding: 16px 20px;
+  border-top: 1px solid #e5e7eb;
+  display: flex;
+  justify-content: center;
+}
+
+.image-preview-download {
+  padding: 12px 32px;
+  border: none;
+  border-radius: 10px;
+  background: #0ea5e9;
+  color: #fff;
+  font-size: 15px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: all 0.2s;
+}
+
+.image-preview-download:hover {
+  background: #0284c7;
+  transform: translateY(-1px);
+  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
+}
+
+/* 搜索高亮动画 */
+.search-highlight {
+  background-color: rgba(250, 204, 21, 0.5);
+  border-radius: 2px;
+  animation: searchPulse 1s ease-in-out;
+}
+
+@keyframes searchPulse {
+  0%, 100% {
+    background-color: rgba(250, 204, 21, 0.5);
+  }
+  50% {
+    background-color: rgba(250, 204, 21, 0.8);
+  }
+}

src/renderer/src/utils.ts

@@ -46,4 +46,101 @@ export function loadPreviewLineHeight(): string {
   const n = Number.parseFloat(raw)
   if (!Number.isFinite(n)) return '1.5'
   return String(Math.min(3, Math.max(1, n)))
-}
+}
+
+export async function exportElementToImageData(element: HTMLElement): Promise<string> {
+  const html2canvas = (await import('html2canvas')).default
+
+  // 创建一个完全独立的 iframe 来渲染内容
+  const iframe = document.createElement('iframe')
+  iframe.style.cssText = 'position:absolute;left:-9999px;top:-9999px;width:800px;height:600px;border:none;'
+  document.body.appendChild(iframe)
+
+  const iframeDoc = iframe.contentDocument!
+  const iframeWin = iframe.contentWindow!
+
+  // 复制必要的样式
+  const computedStyle = iframeWin.getComputedStyle(element)
+  const bgColor = computedStyle.backgroundColor || '#ffffff'
+  const color = computedStyle.color || '#333333'
+  const fontFamily = computedStyle.fontFamily || 'sans-serif'
+  const fontSize = computedStyle.fontSize || '16px'
+  const lineHeight = computedStyle.lineHeight || '1.5'
+
+  // 写入干净的 HTML 和 CSS
+  iframeDoc.open()
+  iframeDoc.write(`
+    <!DOCTYPE html>
+    <html>
+    <head>
+      <meta charset="UTF-8">
+      <style>
+        * { margin: 0; padding: 0; box-sizing: border-box; }
+        body {
+          font-family: ${fontFamily};
+          font-size: ${fontSize};
+          line-height: ${lineHeight};
+          color: ${color};
+          background: ${bgColor};
+          padding: 20px;
+        }
+        h1 { font-size: 2em; margin: 0.5em 0; }
+        h2 { font-size: 1.5em; margin: 0.5em 0; }
+        h3 { font-size: 1.25em; margin: 0.5em 0; }
+        p { margin: 0.5em 0; }
+        pre, code {
+          font-family: 'Consolas', 'Monaco', monospace;
+          font-size: 0.9em;
+          background: #f5f5f5;
+          padding: 0.2em 0.4em;
+          border-radius: 3px;
+        }
+        pre {
+          padding: 1em;
+          overflow-x: auto;
+        }
+        blockquote {
+          border-left: 3px solid #ddd;
+          padding-left: 1em;
+          margin: 1em 0;
+          color: #666;
+        }
+        img { max-width: 100%; height: auto; }
+        table { border-collapse: collapse; width: 100%; }
+        th, td { border: 1px solid #ddd; padding: 8px; }
+        a { color: #0066cc; }
+        hr { border: none; border-top: 1px solid #ddd; margin: 1em 0; }
+      </style>
+    </head>
+    <body>${element.innerHTML}</body>
+    </html>
+  `)
+  iframeDoc.close()
+
+  // 等待 iframe 加载
+  await new Promise<void>(resolve => {
+    iframeDoc.body ? resolve() : iframe.addEventListener('load', () => resolve(), { once: true })
+  })
+
+  // 等待任何异步内容（如图片）加载
+  await new Promise<void>(resolve => setTimeout(resolve, 500))
+
+  try {
+    const canvas = await html2canvas(iframeDoc.body, {
+      useCORS: true,
+      allowTaint: true,
+      backgroundColor: '#ffffff',
+      scale: 2,
+      logging: false,
+      width: iframeDoc.body.scrollWidth + 40,
+      height: iframeDoc.body.scrollHeight + 40
+    })
+
+    return canvas.toDataURL('image/png')
+  } finally {
+    // 清理
+    if (iframe.parentNode) {
+      iframe.parentNode.removeChild(iframe)
+    }
+  }
+}