constructor()

in web/pdf_viewer.js [284:410]

• 112 lines of code
• 41 McCabe index (conditional complexity)

  constructor(options) {
    const viewerVersion =
      typeof PDFJSDev !== "undefined" ? PDFJSDev.eval("BUNDLE_VERSION") : null;
    if (version !== viewerVersion) {
      throw new Error(
        `The API version "${version}" does not match the Viewer version "${viewerVersion}".`
      );
    }
    this.container = options.container;
    this.viewer = options.viewer || options.container.firstElementChild;

    if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
      if (this.container?.tagName !== "DIV" || this.viewer?.tagName !== "DIV") {
        throw new Error("Invalid `container` and/or `viewer` option.");
      }

      if (
        this.container.offsetParent &&
        getComputedStyle(this.container).position !== "absolute"
      ) {
        throw new Error("The `container` must be absolutely positioned.");
      }
    }
    this.#resizeObserver.observe(this.container);

    this.eventBus = options.eventBus;
    this.linkService = options.linkService || new SimpleLinkService();
    this.downloadManager = options.downloadManager || null;
    this.findController = options.findController || null;
    this.#altTextManager = options.altTextManager || null;
    this.#signatureManager = options.signatureManager || null;
    this.#editorUndoBar = options.editorUndoBar || null;

    if (this.findController) {
      this.findController.onIsPageVisible = pageNumber =>
        this._getVisiblePages().ids.has(pageNumber);
    }
    this._scriptingManager = options.scriptingManager || null;
    this.#textLayerMode = options.textLayerMode ?? TextLayerMode.ENABLE;
    this.#annotationMode =
      options.annotationMode ?? AnnotationMode.ENABLE_FORMS;
    this.#annotationEditorMode =
      options.annotationEditorMode ?? AnnotationEditorType.NONE;
    this.#annotationEditorHighlightColors =
      options.annotationEditorHighlightColors || null;
    this.#enableHighlightFloatingButton =
      options.enableHighlightFloatingButton === true;
    this.#enableUpdatedAddImage = options.enableUpdatedAddImage === true;
    this.#enableNewAltTextWhenAddingImage =
      options.enableNewAltTextWhenAddingImage === true;
    this.imageResourcesPath = options.imageResourcesPath || "";
    this.enablePrintAutoRotate = options.enablePrintAutoRotate || false;
    if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
      this.removePageBorders = options.removePageBorders || false;
    }
    this.maxCanvasPixels = options.maxCanvasPixels;
    this.maxCanvasDim = options.maxCanvasDim;
    this.capCanvasAreaFactor = options.capCanvasAreaFactor;
    this.enableDetailCanvas = options.enableDetailCanvas ?? true;
    this.l10n = options.l10n;
    if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
      this.l10n ||= new GenericL10n();
    }
    this.#enablePermissions = options.enablePermissions || false;
    this.pageColors = options.pageColors || null;
    this.#mlManager = options.mlManager || null;
    this.#enableHWA = options.enableHWA || false;
    this.#supportsPinchToZoom = options.supportsPinchToZoom !== false;
    this.#enableAutoLinking = options.enableAutoLinking !== false;
    this.#minDurationToUpdateCanvas = options.minDurationToUpdateCanvas ?? 500;

    this.defaultRenderingQueue = !options.renderingQueue;
    if (
      (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) &&
      this.defaultRenderingQueue
    ) {
      // Custom rendering queue is not specified, using default one
      this.renderingQueue = new PDFRenderingQueue();
      this.renderingQueue.setViewer(this);
    } else {
      this.renderingQueue = options.renderingQueue;
    }

    const { abortSignal } = options;
    abortSignal?.addEventListener(
      "abort",
      () => {
        this.#resizeObserver.disconnect();
        this.#resizeObserver = null;
      },
      { once: true }
    );

    this.scroll = watchScroll(
      this.container,
      this._scrollUpdate.bind(this),
      abortSignal
    );
    this.presentationModeState = PresentationModeState.UNKNOWN;
    this._resetView();

    if (
      (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) &&
      this.removePageBorders
    ) {
      this.viewer.classList.add("removePageBorders");
    }

    this.#updateContainerHeightCss();

    // Trigger API-cleanup, once thumbnail rendering has finished,
    // if the relevant pageView is *not* cached in the buffer.
    this.eventBus._on("thumbnailrendered", ({ pageNumber, pdfPage }) => {
      const pageView = this._pages[pageNumber - 1];
      if (!this.#buffer.has(pageView)) {
        pdfPage?.cleanup();
      }
    });

    if (
      (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) &&
      !options.l10n
    ) {
      // Ensure that Fluent is connected in e.g. the COMPONENTS build.
      this.l10n.translate(this.container);
    }
  }