@tldraw/utils
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tldraw infinite canvas SDK (private utilities).
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{
"version": 3,
"sources": ["../../../src/lib/media/media.ts"],
"sourcesContent": ["import { promiseWithResolve } from '../control'\nimport { Image } from '../network'\nimport { isApngAnimated } from './apng'\nimport { isAvifAnimated } from './avif'\nimport { isGifAnimated } from './gif'\nimport { PngHelpers } from './png'\nimport { isWebpAnimated } from './webp'\n\n/**\n * Array of supported vector image MIME types.\n *\n * @example\n * ```ts\n * import { DEFAULT_SUPPORTED_VECTOR_IMAGE_TYPES } from '@tldraw/utils'\n *\n * const isSvg = DEFAULT_SUPPORTED_VECTOR_IMAGE_TYPES.includes('image/svg+xml')\n * console.log(isSvg) // true\n * ```\n * @public\n */\nexport const DEFAULT_SUPPORTED_VECTOR_IMAGE_TYPES = Object.freeze(['image/svg+xml' as const])\n/**\n * Array of supported static (non-animated) image MIME types.\n *\n * @example\n * ```ts\n * import { DEFAULT_SUPPORTED_STATIC_IMAGE_TYPES } from '@tldraw/utils'\n *\n * const isStatic = DEFAULT_SUPPORTED_STATIC_IMAGE_TYPES.includes('image/jpeg')\n * console.log(isStatic) // true\n * ```\n * @public\n */\nexport const DEFAULT_SUPPORTED_STATIC_IMAGE_TYPES = Object.freeze([\n\t'image/jpeg' as const,\n\t'image/png' as const,\n\t'image/webp' as const,\n])\n/**\n * Array of supported animated image MIME types.\n *\n * @example\n * ```ts\n * import { DEFAULT_SUPPORTED_ANIMATED_IMAGE_TYPES } from '@tldraw/utils'\n *\n * const isAnimated = DEFAULT_SUPPORTED_ANIMATED_IMAGE_TYPES.includes('image/gif')\n * console.log(isAnimated) // true\n * ```\n * @public\n */\nexport const DEFAULT_SUPPORTED_ANIMATED_IMAGE_TYPES = Object.freeze([\n\t'image/gif' as const,\n\t'image/apng' as const,\n\t'image/avif' as const,\n])\n/**\n * Array of all supported image MIME types, combining static, vector, and animated types.\n *\n * @example\n * ```ts\n * import { DEFAULT_SUPPORTED_IMAGE_TYPES } from '@tldraw/utils'\n *\n * const isSupported = DEFAULT_SUPPORTED_IMAGE_TYPES.includes('image/png')\n * console.log(isSupported) // true\n * ```\n * @public\n */\nexport const DEFAULT_SUPPORTED_IMAGE_TYPES = Object.freeze([\n\t...DEFAULT_SUPPORTED_STATIC_IMAGE_TYPES,\n\t...DEFAULT_SUPPORTED_VECTOR_IMAGE_TYPES,\n\t...DEFAULT_SUPPORTED_ANIMATED_IMAGE_TYPES,\n])\n/**\n * Array of supported video MIME types.\n *\n * @example\n * ```ts\n * import { DEFAULT_SUPPORT_VIDEO_TYPES } from '@tldraw/utils'\n *\n * const isVideo = DEFAULT_SUPPORT_VIDEO_TYPES.includes('video/mp4')\n * console.log(isVideo) // true\n * ```\n * @public\n */\nexport const DEFAULT_SUPPORT_VIDEO_TYPES = Object.freeze([\n\t'video/mp4' as const,\n\t'video/webm' as const,\n\t'video/quicktime' as const,\n])\n/**\n * Array of all supported media MIME types, combining images and videos.\n *\n * @example\n * ```ts\n * import { DEFAULT_SUPPORTED_MEDIA_TYPES } from '@tldraw/utils'\n *\n * const isMediaFile = DEFAULT_SUPPORTED_MEDIA_TYPES.includes('video/mp4')\n * console.log(isMediaFile) // true\n * ```\n * @public\n */\nexport const DEFAULT_SUPPORTED_MEDIA_TYPES = Object.freeze([\n\t...DEFAULT_SUPPORTED_IMAGE_TYPES,\n\t...DEFAULT_SUPPORT_VIDEO_TYPES,\n])\n/**\n * Comma-separated string of all supported media MIME types, useful for HTML file input accept attributes.\n *\n * @example\n * ```ts\n * import { DEFAULT_SUPPORTED_MEDIA_TYPE_LIST } from '@tldraw/utils'\n *\n * // Use in HTML file input for media uploads\n * const input = document.createElement('input')\n * input.type = 'file'\n * input.accept = DEFAULT_SUPPORTED_MEDIA_TYPE_LIST\n * input.addEventListener('change', (e) => {\n * const files = (e.target as HTMLInputElement).files\n * if (files) console.log(`Selected ${files.length} file(s)`)\n * })\n * ```\n * @public\n */\nexport const DEFAULT_SUPPORTED_MEDIA_TYPE_LIST = DEFAULT_SUPPORTED_MEDIA_TYPES.join(',')\n\n/**\n * Helpers for media\n *\n * @public\n */\nexport class MediaHelpers {\n\t/**\n\t * Load a video element from a URL with cross-origin support.\n\t *\n\t * @param src - The URL of the video to load\n\t * @returns Promise that resolves to the loaded HTMLVideoElement\n\t * @example\n\t * ```ts\n\t * const video = await MediaHelpers.loadVideo('https://example.com/video.mp4')\n\t * console.log(`Video dimensions: ${video.videoWidth}x${video.videoHeight}`)\n\t * ```\n\t * @public\n\t */\n\tstatic loadVideo(src: string): Promise<HTMLVideoElement> {\n\t\treturn new Promise((resolve, reject) => {\n\t\t\tconst video = document.createElement('video')\n\t\t\tvideo.onloadeddata = () => resolve(video)\n\t\t\tvideo.onerror = (e) => {\n\t\t\t\tconsole.error(e)\n\t\t\t\treject(new Error('Could not load video'))\n\t\t\t}\n\t\t\tvideo.crossOrigin = 'anonymous'\n\t\t\tvideo.src = src\n\t\t})\n\t}\n\n\t/**\n\t * Extract a frame from a video element as a data URL.\n\t *\n\t * @param video - The HTMLVideoElement to extract frame from\n\t * @param time - The time in seconds to extract the frame from (default: 0)\n\t * @returns Promise that resolves to a data URL of the video frame\n\t * @example\n\t * ```ts\n\t * const video = await MediaHelpers.loadVideo('https://example.com/video.mp4')\n\t * const frameDataUrl = await MediaHelpers.getVideoFrameAsDataUrl(video, 5.0)\n\t * // Use frameDataUrl as image thumbnail\n\t * const img = document.createElement('img')\n\t * img.src = frameDataUrl\n\t * ```\n\t * @public\n\t */\n\tstatic async getVideoFrameAsDataUrl(video: HTMLVideoElement, time = 0): Promise<string> {\n\t\tconst promise = promiseWithResolve<string>()\n\t\tlet didSetTime = false\n\n\t\tconst onReadyStateChanged = () => {\n\t\t\tif (!didSetTime) {\n\t\t\t\tif (video.readyState >= video.HAVE_METADATA) {\n\t\t\t\t\tdidSetTime = true\n\t\t\t\t\tvideo.currentTime = time\n\t\t\t\t} else {\n\t\t\t\t\treturn\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif (video.readyState >= video.HAVE_CURRENT_DATA) {\n\t\t\t\tconst canvas = document.createElement('canvas')\n\t\t\t\tcanvas.width = video.videoWidth\n\t\t\t\tcanvas.height = video.videoHeight\n\t\t\t\tconst ctx = canvas.getContext('2d')\n\t\t\t\tif (!ctx) {\n\t\t\t\t\tthrow new Error('Could not get 2d context')\n\t\t\t\t}\n\t\t\t\tctx.drawImage(video, 0, 0)\n\t\t\t\tpromise.resolve(canvas.toDataURL())\n\t\t\t}\n\t\t}\n\t\tconst onError = (e: Event) => {\n\t\t\tconsole.error(e)\n\t\t\tpromise.reject(new Error('Could not get video frame'))\n\t\t}\n\n\t\tvideo.addEventListener('loadedmetadata', onReadyStateChanged)\n\t\tvideo.addEventListener('loadeddata', onReadyStateChanged)\n\t\tvideo.addEventListener('canplay', onReadyStateChanged)\n\t\tvideo.addEventListener('seeked', onReadyStateChanged)\n\n\t\tvideo.addEventListener('error', onError)\n\t\tvideo.addEventListener('stalled', onError)\n\n\t\tonReadyStateChanged()\n\n\t\ttry {\n\t\t\treturn await promise\n\t\t} finally {\n\t\t\tvideo.removeEventListener('loadedmetadata', onReadyStateChanged)\n\t\t\tvideo.removeEventListener('loadeddata', onReadyStateChanged)\n\t\t\tvideo.removeEventListener('canplay', onReadyStateChanged)\n\t\t\tvideo.removeEventListener('seeked', onReadyStateChanged)\n\n\t\t\tvideo.removeEventListener('error', onError)\n\t\t\tvideo.removeEventListener('stalled', onError)\n\t\t}\n\t}\n\n\t/**\n\t * Load an image from a URL and get its dimensions along with the image element.\n\t *\n\t * @param src - The URL of the image to load\n\t * @returns Promise that resolves to an object with width, height, and the image element\n\t * @example\n\t * ```ts\n\t * const { w, h, image } = await MediaHelpers.getImageAndDimensions('https://example.com/image.png')\n\t * console.log(`Image size: ${w}x${h}`)\n\t * // Image is ready to use\n\t * document.body.appendChild(image)\n\t * ```\n\t * @public\n\t */\n\tstatic getImageAndDimensions(\n\t\tsrc: string\n\t): Promise<{ w: number; h: number; image: HTMLImageElement }> {\n\t\treturn new Promise((resolve, reject) => {\n\t\t\tconst img = Image()\n\t\t\timg.onload = () => {\n\t\t\t\tlet dimensions\n\t\t\t\tif (img.naturalWidth) {\n\t\t\t\t\tdimensions = {\n\t\t\t\t\t\tw: img.naturalWidth,\n\t\t\t\t\t\th: img.naturalHeight,\n\t\t\t\t\t}\n\t\t\t\t} else {\n\t\t\t\t\t// Sigh, Firefox doesn't have naturalWidth or naturalHeight for SVGs. :-/\n\t\t\t\t\t// We have to attach to dom and use clientWidth/clientHeight.\n\t\t\t\t\tdocument.body.appendChild(img)\n\t\t\t\t\tdimensions = {\n\t\t\t\t\t\tw: img.clientWidth,\n\t\t\t\t\t\th: img.clientHeight,\n\t\t\t\t\t}\n\t\t\t\t\tdocument.body.removeChild(img)\n\t\t\t\t}\n\t\t\t\tresolve({ ...dimensions, image: img })\n\t\t\t}\n\t\t\timg.onerror = (e) => {\n\t\t\t\tconsole.error(e)\n\t\t\t\treject(new Error('Could not load image'))\n\t\t\t}\n\t\t\timg.crossOrigin = 'anonymous'\n\t\t\timg.referrerPolicy = 'strict-origin-when-cross-origin'\n\t\t\timg.style.visibility = 'hidden'\n\t\t\timg.style.position = 'absolute'\n\t\t\timg.style.opacity = '0'\n\t\t\timg.style.zIndex = '-9999'\n\t\t\timg.src = src\n\t\t})\n\t}\n\n\t/**\n\t * Get the size of a video blob\n\t *\n\t * @param blob - A Blob containing the video\n\t * @returns Promise that resolves to an object with width and height properties\n\t * @example\n\t * ```ts\n\t * const file = new File([...], 'video.mp4', { type: 'video/mp4' })\n\t * const { w, h } = await MediaHelpers.getVideoSize(file)\n\t * console.log(`Video dimensions: ${w}x${h}`)\n\t * ```\n\t * @public\n\t */\n\tstatic async getVideoSize(blob: Blob): Promise<{ w: number; h: number }> {\n\t\treturn MediaHelpers.usingObjectURL(blob, async (url) => {\n\t\t\tconst video = await MediaHelpers.loadVideo(url)\n\t\t\treturn { w: video.videoWidth, h: video.videoHeight }\n\t\t})\n\t}\n\n\t/**\n\t * Get the size of an image blob\n\t *\n\t * @param blob - A Blob containing the image\n\t * @returns Promise that resolves to an object with width and height properties\n\t * @example\n\t * ```ts\n\t * const file = new File([...], 'image.png', { type: 'image/png' })\n\t * const { w, h } = await MediaHelpers.getImageSize(file)\n\t * console.log(`Image dimensions: ${w}x${h}`)\n\t * ```\n\t * @public\n\t */\n\tstatic async getImageSize(blob: Blob): Promise<{ w: number; h: number }> {\n\t\tconst { w, h } = await MediaHelpers.usingObjectURL(blob, MediaHelpers.getImageAndDimensions)\n\n\t\ttry {\n\t\t\tif (blob.type === 'image/png') {\n\t\t\t\tconst view = new DataView(await blob.arrayBuffer())\n\t\t\t\tif (PngHelpers.isPng(view, 0)) {\n\t\t\t\t\tconst physChunk = PngHelpers.findChunk(view, 'pHYs')\n\t\t\t\t\tif (physChunk) {\n\t\t\t\t\t\tconst physData = PngHelpers.parsePhys(view, physChunk.dataOffset)\n\t\t\t\t\t\tif (physData.unit === 1 && physData.ppux === physData.ppuy) {\n\t\t\t\t\t\t\t// Calculate pixels per meter:\n\t\t\t\t\t\t\t// - 1 inch = 0.0254 meters\n\t\t\t\t\t\t\t// - 72 DPI is 72 dots per inch\n\t\t\t\t\t\t\t// - pixels per meter = 72 / 0.0254\n\t\t\t\t\t\t\tconst pixelsPerMeter = 72 / 0.0254\n\t\t\t\t\t\t\tconst pixelRatio = Math.max(physData.ppux / pixelsPerMeter, 1)\n\t\t\t\t\t\t\treturn {\n\t\t\t\t\t\t\t\tw: Math.round(w / pixelRatio),\n\t\t\t\t\t\t\t\th: Math.round(h / pixelRatio),\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t} catch (err) {\n\t\t\tconsole.error(err)\n\t\t\treturn { w, h }\n\t\t}\n\t\treturn { w, h }\n\t}\n\n\t/**\n\t * Check if a media file blob contains animation data.\n\t *\n\t * @param file - The Blob to check for animation\n\t * @returns Promise that resolves to true if the file is animated, false otherwise\n\t * @example\n\t * ```ts\n\t * const file = new File([...], 'animation.gif', { type: 'image/gif' })\n\t * const animated = await MediaHelpers.isAnimated(file)\n\t * console.log(animated ? 'Animated' : 'Static')\n\t * ```\n\t * @public\n\t */\n\tstatic async isAnimated(file: Blob): Promise<boolean> {\n\t\tif (file.type === 'image/gif') {\n\t\t\treturn isGifAnimated(await file.arrayBuffer())\n\t\t}\n\n\t\tif (file.type === 'image/avif') {\n\t\t\treturn isAvifAnimated(await file.arrayBuffer())\n\t\t}\n\n\t\tif (file.type === 'image/webp') {\n\t\t\treturn isWebpAnimated(await file.arrayBuffer())\n\t\t}\n\n\t\tif (file.type === 'image/apng') {\n\t\t\treturn isApngAnimated(await file.arrayBuffer())\n\t\t}\n\n\t\treturn false\n\t}\n\n\t/**\n\t * Check if a MIME type represents an animated image format.\n\t *\n\t * @param mimeType - The MIME type to check\n\t * @returns True if the MIME type is an animated image format, false otherwise\n\t * @example\n\t * ```ts\n\t * const isAnimated = MediaHelpers.isAnimatedImageType('image/gif')\n\t * console.log(isAnimated) // true\n\t * ```\n\t * @public\n\t */\n\tstatic isAnimatedImageType(mimeType: string | null): boolean {\n\t\treturn DEFAULT_SUPPORTED_ANIMATED_IMAGE_TYPES.includes((mimeType as any) || '')\n\t}\n\n\t/**\n\t * Check if a MIME type represents a static (non-animated) image format.\n\t *\n\t * @param mimeType - The MIME type to check\n\t * @returns True if the MIME type is a static image format, false otherwise\n\t * @example\n\t * ```ts\n\t * const isStatic = MediaHelpers.isStaticImageType('image/jpeg')\n\t * console.log(isStatic) // true\n\t * ```\n\t * @public\n\t */\n\tstatic isStaticImageType(mimeType: string | null): boolean {\n\t\treturn DEFAULT_SUPPORTED_STATIC_IMAGE_TYPES.includes((mimeType as any) || '')\n\t}\n\n\t/**\n\t * Check if a MIME type represents a vector image format.\n\t *\n\t * @param mimeType - The MIME type to check\n\t * @returns True if the MIME type is a vector image format, false otherwise\n\t * @example\n\t * ```ts\n\t * const isVector = MediaHelpers.isVectorImageType('image/svg+xml')\n\t * console.log(isVector) // true\n\t * ```\n\t * @public\n\t */\n\tstatic isVectorImageType(mimeType: string | null): boolean {\n\t\treturn DEFAULT_SUPPORTED_VECTOR_IMAGE_TYPES.includes((mimeType as any) || '')\n\t}\n\n\t/**\n\t * Check if a MIME type represents any supported image format (static, animated, or vector).\n\t *\n\t * @param mimeType - The MIME type to check\n\t * @returns True if the MIME type is a supported image format, false otherwise\n\t * @example\n\t * ```ts\n\t * const isImage = MediaHelpers.isImageType('image/png')\n\t * console.log(isImage) // true\n\t * ```\n\t * @public\n\t */\n\tstatic isImageType(mimeType: string): boolean {\n\t\treturn DEFAULT_SUPPORTED_IMAGE_TYPES.includes((mimeType as any) || '')\n\t}\n\n\t/**\n\t * Utility function to create an object URL from a blob, execute a function with it, and automatically clean it up.\n\t *\n\t * @param blob - The Blob to create an object URL for\n\t * @param fn - Function to execute with the object URL\n\t * @returns Promise that resolves to the result of the function\n\t * @example\n\t * ```ts\n\t * const result = await MediaHelpers.usingObjectURL(imageBlob, async (url) => {\n\t * const { w, h } = await MediaHelpers.getImageAndDimensions(url)\n\t * return { width: w, height: h }\n\t * })\n\t * // Object URL is automatically revoked after function completes\n\t * console.log(`Image dimensions: ${result.width}x${result.height}`)\n\t * ```\n\t * @public\n\t */\n\tstatic async usingObjectURL<T>(blob: Blob, fn: (url: string) => Promise<T>): Promise<T> {\n\t\tconst url = URL.createObjectURL(blob)\n\t\ttry {\n\t\t\treturn await fn(url)\n\t\t} finally {\n\t\t\tURL.revokeObjectURL(url)\n\t\t}\n\t}\n}\n"],
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