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ngx-extended-pdf-viewer

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Embedding PDF files in your Angular application. Highly configurable viewer including the toolbar, sidebar, and all the features you're used to.

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import { AnnotationMode } from './editor-annotations'; const _isIE11 = typeof window === 'undefined' ? false : !!globalThis.MSInputMethodContext && !!document.documentMode; const isEdge = typeof navigator === 'undefined' || /Edge\/\d./i.test(navigator.userAgent); const needsES5 = typeof ReadableStream === 'undefined' || typeof Promise['allSettled'] === 'undefined'; export const pdfjsVersion = '4.10.708'; export const pdfjsBleedingEdgeVersion = '4.10.708'; export function getVersionSuffix(folder) { if (folder?.includes('bleeding-edge')) { return pdfjsBleedingEdgeVersion; } return pdfjsVersion; } export function assetsUrl(url, postfixIfPathIsRelativ = '') { if (url.includes('://')) { // the assets folder is on an absolute path (like https://example.com/assets) return url; } return `./${url + postfixIfPathIsRelativ}`; } export function getSafeCanvasSize() { if (typeof window === 'undefined' || typeof document === 'undefined') { return 4096; } // Create a temporary WebGL context const canvas = document.createElement('canvas'); const gl = canvas.getContext('webgl') || canvas.getContext('experimental-webgl'); let maxTextureSize; if (gl instanceof WebGLRenderingContext) { maxTextureSize = gl.getParameter(gl.MAX_TEXTURE_SIZE); } else { maxTextureSize = 4096; } // Get available device RAM (in MB) function getAvailableMemoryMB() { if ('deviceMemory' in navigator) { return navigator.deviceMemory * 1024; // Convert GB to MB } if (window.performance && 'memory' in window.performance) { return window.performance.memory.jsHeapSizeLimit / 1024 / 1024; // Only works on Chrome, Firefox, and Edgewindow.performance.memory.jsHeapSizeLimit / 1024 / 1024; // Only works on Chrome } return 4096; // Default to 4GB if unknown } const availableMemoryMB = getAvailableMemoryMB(); // Conservative formula: Scale by square root of available memory let estimatedSafeSize = Math.floor(Math.sqrt((availableMemoryMB * 1024 * 1024) / 6)); // Apply platform-specific limits const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !('MSStream' in window); const isMobile = /Android|iPhone|iPad|iPod/.test(navigator.userAgent); const isHighEndDesktop = availableMemoryMB > 12000; // Assume high-end desktops have >12GB RAM if (isIOS) { estimatedSafeSize = Math.min(estimatedSafeSize, 4096); // iOS Safari memory limits } else if (isMobile) { estimatedSafeSize = Math.min(estimatedSafeSize, 4096); // Most mobile devices } else if (isHighEndDesktop) { estimatedSafeSize = Math.min(estimatedSafeSize, 8192); // Allow larger sizes for desktops } else { estimatedSafeSize = Math.min(estimatedSafeSize, 6000); // Mid-range desktops } // Final limit based on GPU and estimated memory safety const maxWidth = Math.min(maxTextureSize, estimatedSafeSize); return maxWidth * maxWidth; } // sonar ignore next line export const pdfDefaultOptions = { needsES5: _isIE11 || isEdge || needsES5, annotationEditorMode: 0, annotationMode: AnnotationMode.ENABLE_FORMS, defaultZoomDelay: 400, cursorToolOnLoad: 0, defaultUrl: '', defaultZoomValue: '', disableHistory: false, disablePageLabels: false, enablePermissions: false, docBaseUrl: '', enablePrintAutoRotate: true, externalLinkRel: 'noopener noreferrer nofollow', externalLinkTarget: 0, findController: undefined, historyUpdateUrl: false, ignoreDestinationZoom: false, imageResourcesPath: './images/', maxCanvasPixels: getSafeCanvasSize(), forcePageColors: false, pageColorsBackground: 'Canvas', pageColorsForeground: 'CanvasText', pdfBugEnabled: false, printResolution: 150, rangeChunkSize: 65536, removePageBorders: false, enableXfa: true, fontExtraProperties: false, sidebarViewOnLoad: -1, scrollModeOnLoad: -1, spreadModeOnLoad: -1, textLayerMode: 1, // viewerCssTheme: 0, // not supported by ngx-extended-pdf-viewer, use [theme] instead viewOnLoad: 0, cMapPacked: true, cMapUrl: function () { return `${assetsUrl(pdfDefaultOptions.assetsFolder, '/..')}/cmaps/`; }, disableAutoFetch: false, disableFontFace: false, disableRange: false, disableStream: true, isEvalSupported: true, isOffscreenCanvasSupported: true, maxImageSize: -1, pdfBug: false, verbosity: 1, workerPort: null, assetsFolder: 'assets', _internalFilenameSuffix: '.min', sandboxBundleSrc: function () { return pdfDefaultOptions.needsES5 ? `./pdf.sandbox-${getVersionSuffix(assetsUrl(pdfDefaultOptions.assetsFolder))}-es5.mjs` : `./pdf.sandbox-${getVersionSuffix(assetsUrl(pdfDefaultOptions.assetsFolder))}${pdfDefaultOptions._internalFilenameSuffix}.mjs`; }, workerSrc: function () { return pdfDefaultOptions.needsES5 ? `${assetsUrl(pdfDefaultOptions.assetsFolder)}/pdf.worker-${getVersionSuffix(assetsUrl(pdfDefaultOptions.assetsFolder))}-es5.mjs` : `${assetsUrl(pdfDefaultOptions.assetsFolder)}/pdf.worker-${getVersionSuffix(assetsUrl(pdfDefaultOptions.assetsFolder))}${pdfDefaultOptions._internalFilenameSuffix}.mjs`; }, standardFontDataUrl: () => `${assetsUrl(pdfDefaultOptions.assetsFolder, '/..')}/standard_fonts/`, // options specific to ngx-extended-pdf-viewer (as opposed to being used by pdf.js) doubleTapZoomFactor: 'page-width', doubleTapZoomsInHandMode: true, doubleTapZoomsInTextSelectionMode: false, doubleTapResetsZoomOnSecondDoubleTap: false, enableScripting: true, defaultCacheSize: 50, passwordPrompt: undefined, enableHWA: true, // enable hardware acceleration. 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false : !!(<any>globalThis).MSInputMethodContext && !!(<any>document).documentMode;\nconst isEdge = typeof navigator === 'undefined' || /Edge\\/\\d./i.test(navigator.userAgent);\nconst needsES5 = typeof ReadableStream === 'undefined' || typeof Promise['allSettled'] === 'undefined';\n\nexport const pdfjsVersion = '4.10.708';\nexport const pdfjsBleedingEdgeVersion = '4.10.708';\nexport function getVersionSuffix(folder: string): string {\n  if (folder?.includes('bleeding-edge')) {\n    return pdfjsBleedingEdgeVersion;\n  }\n  return pdfjsVersion;\n}\n\nexport function assetsUrl(url: string, postfixIfPathIsRelativ = ''): string {\n  if (url.includes('://')) {\n    // the assets folder is on an absolute path (like https://example.com/assets)\n    return url;\n  }\n  return `./${url + postfixIfPathIsRelativ}`;\n}\n\nexport function getSafeCanvasSize(): number {\n  if (typeof window === 'undefined' || typeof document === 'undefined') {\n    return 4096;\n  }\n  // Create a temporary WebGL context\n  const canvas = document.createElement('canvas');\n  const gl = canvas.getContext('webgl') || canvas.getContext('experimental-webgl');\n  let maxTextureSize;\n  if (gl instanceof WebGLRenderingContext) {\n    maxTextureSize = gl.getParameter(gl.MAX_TEXTURE_SIZE);\n  } else {\n    maxTextureSize = 4096;\n  }\n  // Get available device RAM (in MB)\n  function getAvailableMemoryMB(): number {\n    if ('deviceMemory' in navigator) {\n      return (navigator.deviceMemory as number) * 1024; // Convert GB to MB\n    }\n    if (window.performance && 'memory' in window.performance) {\n      return (window.performance.memory as any).jsHeapSizeLimit / 1024 / 1024; // Only works on Chrome, Firefox, and Edgewindow.performance.memory.jsHeapSizeLimit / 1024 / 1024; // Only works on Chrome\n    }\n    return 4096; // Default to 4GB if unknown\n  }\n\n  const availableMemoryMB = getAvailableMemoryMB();\n\n  // Conservative formula: Scale by square root of available memory\n  let estimatedSafeSize = Math.floor(Math.sqrt((availableMemoryMB * 1024 * 1024) / 6));\n\n  // Apply platform-specific limits\n  const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !('MSStream' in window);\n  const isMobile = /Android|iPhone|iPad|iPod/.test(navigator.userAgent);\n  const isHighEndDesktop = availableMemoryMB > 12000; // Assume high-end desktops have >12GB RAM\n\n  if (isIOS) {\n    estimatedSafeSize = Math.min(estimatedSafeSize, 4096); // iOS Safari memory limits\n  } else if (isMobile) {\n    estimatedSafeSize = Math.min(estimatedSafeSize, 4096); // Most mobile devices\n  } else if (isHighEndDesktop) {\n    estimatedSafeSize = Math.min(estimatedSafeSize, 8192); // Allow larger sizes for desktops\n  } else {\n    estimatedSafeSize = Math.min(estimatedSafeSize, 6000); // Mid-range desktops\n  }\n\n  // Final limit based on GPU and estimated memory safety\n  const maxWidth = Math.min(maxTextureSize, estimatedSafeSize);\n  return maxWidth * maxWidth;\n}\n\n// sonar ignore next line\nexport const pdfDefaultOptions = {\n  needsES5: _isIE11 || isEdge || needsES5,\n  annotationEditorMode: 0,\n  annotationMode: AnnotationMode.ENABLE_FORMS,\n  defaultZoomDelay: 400, // milliseconds\n  cursorToolOnLoad: 0,\n  defaultUrl: '',\n  defaultZoomValue: '',\n  disableHistory: false,\n  disablePageLabels: false,\n  enablePermissions: false,\n  docBaseUrl: '',\n  enablePrintAutoRotate: true,\n  externalLinkRel: 'noopener noreferrer nofollow',\n  externalLinkTarget: 0,\n  findController: undefined, // must extend PDFFindController\n  historyUpdateUrl: false,\n  ignoreDestinationZoom: false,\n  imageResourcesPath: './images/',\n  maxCanvasPixels: getSafeCanvasSize(),\n  forcePageColors: false,\n  pageColorsBackground: 'Canvas',\n  pageColorsForeground: 'CanvasText',\n  pdfBugEnabled: false,\n  printResolution: 150,\n  rangeChunkSize: 65536,\n  removePageBorders: false,\n  enableXfa: true,\n  fontExtraProperties: false,\n  sidebarViewOnLoad: -1,\n  scrollModeOnLoad: -1,\n  spreadModeOnLoad: -1,\n  textLayerMode: 1,\n  // viewerCssTheme: 0, // not supported by ngx-extended-pdf-viewer, use [theme] instead\n  viewOnLoad: 0,\n  cMapPacked: true,\n  cMapUrl: function () {\n    return `${assetsUrl(pdfDefaultOptions.assetsFolder, '/..')}/cmaps/`;\n  },\n  disableAutoFetch: false,\n  disableFontFace: false,\n  disableRange: false,\n  disableStream: true,\n  isEvalSupported: true,\n  isOffscreenCanvasSupported: true,\n  maxImageSize: -1,\n  pdfBug: false,\n  verbosity: 1,\n  workerPort: null,\n  assetsFolder: 'assets',\n  _internalFilenameSuffix: '.min', // don't modify this - it's an internal field\n  sandboxBundleSrc: function () {\n    return pdfDefaultOptions.needsES5\n      ? `./pdf.sandbox-${getVersionSuffix(assetsUrl(pdfDefaultOptions.assetsFolder))}-es5.mjs`\n      : `./pdf.sandbox-${getVersionSuffix(assetsUrl(pdfDefaultOptions.assetsFolder))}${pdfDefaultOptions._internalFilenameSuffix}.mjs`;\n  },\n  workerSrc: function () {\n    return pdfDefaultOptions.needsES5\n      ? `${assetsUrl(pdfDefaultOptions.assetsFolder)}/pdf.worker-${getVersionSuffix(assetsUrl(pdfDefaultOptions.assetsFolder))}-es5.mjs`\n      : `${assetsUrl(pdfDefaultOptions.assetsFolder)}/pdf.worker-${getVersionSuffix(assetsUrl(pdfDefaultOptions.assetsFolder))}${\n          pdfDefaultOptions._internalFilenameSuffix\n        }.mjs`;\n  },\n  standardFontDataUrl: () => `${assetsUrl(pdfDefaultOptions.assetsFolder, '/..')}/standard_fonts/`,\n\n  // options specific to ngx-extended-pdf-viewer (as opposed to being used by pdf.js)\n  doubleTapZoomFactor: 'page-width',\n  doubleTapZoomsInHandMode: true,\n  doubleTapZoomsInTextSelectionMode: false,\n  doubleTapResetsZoomOnSecondDoubleTap: false,\n  enableScripting: true,\n  defaultCacheSize: 50,\n  passwordPrompt: undefined,\n  enableHWA: true, // enable hardware acceleration. Active since pdf.js 4.4.\n};\n"]}