ngx-extended-pdf-viewer
Version:
Embedding PDF files in your Angular application. Highly configurable viewer including the toolbar, sidebar, and all the features you're used to.
147 lines • 21.5 kB
JavaScript
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 = '4.10.733';
export const pdfjsBleedingEdgeVersion = '5.3.729';
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}`;
}
function isTestEnvironment() {
return (typeof process !== 'undefined' &&
typeof process.env !== 'undefined' &&
(process.env.NODE_ENV === 'test' || process.env.JEST_WORKER_ID !== undefined || process.env.VITEST !== undefined));
}
export function getSafeCanvasSize() {
if (typeof window === 'undefined' || typeof document === 'undefined' || isTestEnvironment()) {
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,
enableSignatureEditor: 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: () => `${assetsUrl(pdfDefaultOptions.assetsFolder, '/..')}/standard_fonts/`,
// options specific to ngx-extended-pdf-viewer (as opposed to being used by pdf.js)
doubleTapZoomFactor: 'page-width',
doubleTapZoomsInHandMode: true,
doubleTapZoomsInTextSelectionMode: false,
doubleTapResetsZoomOnSecondDoubleTap: false,
enableScripting: true,
defaultCacheSize: 50,
passwordPrompt: undefined,
enableHWA: true,
positionPopupDialogsWithJavaScript: true,
};
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{ AnnotationMode } from './editor-annotations';\n\nconst _isIE11 = typeof window === 'undefined' ? false : !!(<any>globalThis).MSInputMethodContext && !!(<any>document).documentMode;\nconst isEdge = typeof navigator === 'undefined' || /Edge\\/\\d./i.test(navigator.userAgent);\nconst needsES5 = typeof ReadableStream === 'undefined' || typeof Promise['allSettled'] === 'undefined';\n\nexport const pdfjsVersion = '4.10.733';\nexport const pdfjsBleedingEdgeVersion = '5.3.729';\nexport function getVersionSuffix(folder: string): string {\n  if (folder?.includes('bleeding-edge')) {\n    return pdfjsBleedingEdgeVersion;\n  }\n  return pdfjsVersion;\n}\n\nexport function assetsUrl(url: string, postfixIfPathIsRelativ = ''): string {\n  if (url.includes('://')) {\n    // the assets folder is on an absolute path (like https://example.com/assets)\n    return url;\n  }\n  return `./${url + postfixIfPathIsRelativ}`;\n}\n\ndeclare const process: any;\n\nfunction isTestEnvironment(): boolean {\n  return (\n    typeof process !== 'undefined' &&\n    typeof (process as any).env !== 'undefined' &&\n    ((process as any).env.NODE_ENV === 'test' || (process as any).env.JEST_WORKER_ID !== undefined || (process as any).env.VITEST !== undefined)\n  );\n}\n\nexport function getSafeCanvasSize(): number {\n  if (typeof window === 'undefined' || typeof document === 'undefined' || isTestEnvironment()) {\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  enableSignatureEditor: 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  positionPopupDialogsWithJavaScript: true,\n};\n"]}