pdfjs-dist/lib/web/pdf_page_view.js

/**
 * @licstart The following is the entire license notice for the
 * JavaScript code in this page
 *
 * Copyright 2022 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @licend The above is the entire license notice for the
 * JavaScript code in this page
 */
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.PDFPageView = void 0;
var _pdf = require("../pdf");
var _ui_utils = require("./ui_utils.js");
var _annotation_editor_layer_builder = require("./annotation_editor_layer_builder.js");
var _annotation_layer_builder = require("./annotation_layer_builder.js");
var _app_options = require("./app_options.js");
var _l10n_utils = require("./l10n_utils.js");
var _struct_tree_layer_builder = require("./struct_tree_layer_builder.js");
var _text_accessibility = require("./text_accessibility.js");
var _text_highlighter = require("./text_highlighter.js");
var _text_layer_builder = require("./text_layer_builder.js");
var _xfa_layer_builder = require("./xfa_layer_builder.js");
const MAX_CANVAS_PIXELS = _app_options.compatibilityParams.maxCanvasPixels || 16777216;
const DEFAULT_LAYER_PROPERTIES = () => {
  return null;
};
class PDFPageView {
  #annotationMode = _pdf.AnnotationMode.ENABLE_FORMS;
  #layerProperties = null;
  #previousRotation = null;
  #renderingState = _ui_utils.RenderingStates.INITIAL;
  #useThumbnailCanvas = {
    initialOptionalContent: true,
    regularAnnotations: true
  };
  constructor(options) {
    const container = options.container;
    const defaultViewport = options.defaultViewport;
    this.id = options.id;
    this.renderingId = "page" + this.id;
    this.#layerProperties = options.layerProperties || DEFAULT_LAYER_PROPERTIES;
    this.pdfPage = null;
    this.pageLabel = null;
    this.rotation = 0;
    this.scale = options.scale || _ui_utils.DEFAULT_SCALE;
    this.viewport = defaultViewport;
    this.pdfPageRotate = defaultViewport.rotation;
    this._optionalContentConfigPromise = options.optionalContentConfigPromise || null;
    this.hasRestrictedScaling = false;
    this.textLayerMode = options.textLayerMode ?? _ui_utils.TextLayerMode.ENABLE;
    this.#annotationMode = options.annotationMode ?? _pdf.AnnotationMode.ENABLE_FORMS;
    this.imageResourcesPath = options.imageResourcesPath || "";
    this.useOnlyCssZoom = options.useOnlyCssZoom || false;
    this.isOffscreenCanvasSupported = options.isOffscreenCanvasSupported ?? true;
    this.maxCanvasPixels = options.maxCanvasPixels || MAX_CANVAS_PIXELS;
    this.pageColors = options.pageColors || null;
    this.eventBus = options.eventBus;
    this.renderingQueue = options.renderingQueue;
    this.renderer = options.renderer || _ui_utils.RendererType.CANVAS;
    this.l10n = options.l10n || _l10n_utils.NullL10n;
    this.paintTask = null;
    this.paintedViewportMap = new WeakMap();
    this.resume = null;
    this._renderError = null;
    this._isStandalone = !this.renderingQueue?.hasViewer();
    this._annotationCanvasMap = null;
    this.annotationLayer = null;
    this.annotationEditorLayer = null;
    this.textLayer = null;
    this.zoomLayer = null;
    this.xfaLayer = null;
    this.structTreeLayer = null;
    const div = document.createElement("div");
    div.className = "page";
    div.setAttribute("data-page-number", this.id);
    div.setAttribute("role", "region");
    this.l10n.get("page_landmark", {
      page: this.id
    }).then(msg => {
      div.setAttribute("aria-label", msg);
    });
    this.div = div;
    this.#setDimensions();
    container?.append(div);
    if (this._isStandalone) {
      _ui_utils.docStyle.setProperty("--scale-factor", this.scale * _pdf.PixelsPerInch.PDF_TO_CSS_UNITS);
      const {
        optionalContentConfigPromise
      } = options;
      if (optionalContentConfigPromise) {
        optionalContentConfigPromise.then(optionalContentConfig => {
          if (optionalContentConfigPromise !== this._optionalContentConfigPromise) {
            return;
          }
          this.#useThumbnailCanvas.initialOptionalContent = optionalContentConfig.hasInitialVisibility;
        });
      }
    }
  }
  get renderingState() {
    return this.#renderingState;
  }
  set renderingState(state) {
    this.#renderingState = state;
    switch (state) {
      case _ui_utils.RenderingStates.INITIAL:
      case _ui_utils.RenderingStates.PAUSED:
        this.loadingIconDiv?.classList.add("notVisible");
        break;
      case _ui_utils.RenderingStates.RUNNING:
        this.loadingIconDiv?.classList.remove("notVisible");
        break;
      case _ui_utils.RenderingStates.FINISHED:
        if (this.loadingIconDiv) {
          this.loadingIconDiv.remove();
          delete this.loadingIconDiv;
        }
        break;
    }
  }
  #setDimensions() {
    const {
      viewport
    } = this;
    if (this.pdfPage) {
      if (this.#previousRotation === viewport.rotation) {
        return;
      }
      this.#previousRotation = viewport.rotation;
    }
    (0, _pdf.setLayerDimensions)(this.div, viewport, true, false);
  }
  setPdfPage(pdfPage) {
    this.pdfPage = pdfPage;
    this.pdfPageRotate = pdfPage.rotate;
    const totalRotation = (this.rotation + this.pdfPageRotate) % 360;
    this.viewport = pdfPage.getViewport({
      scale: this.scale * _pdf.PixelsPerInch.PDF_TO_CSS_UNITS,
      rotation: totalRotation
    });
    this.#setDimensions();
    this.reset();
  }
  destroy() {
    this.reset();
    this.pdfPage?.cleanup();
  }
  get _textHighlighter() {
    return (0, _pdf.shadow)(this, "_textHighlighter", new _text_highlighter.TextHighlighter({
      pageIndex: this.id - 1,
      eventBus: this.eventBus,
      findController: this.#layerProperties().findController
    }));
  }
  async #renderAnnotationLayer() {
    let error = null;
    try {
      await this.annotationLayer.render(this.viewport, "display");
    } catch (ex) {
      console.error(`#renderAnnotationLayer: "${ex}".`);
      error = ex;
    } finally {
      this.eventBus.dispatch("annotationlayerrendered", {
        source: this,
        pageNumber: this.id,
        error
      });
    }
  }
  async #renderAnnotationEditorLayer() {
    let error = null;
    try {
      await this.annotationEditorLayer.render(this.viewport, "display");
    } catch (ex) {
      console.error(`#renderAnnotationEditorLayer: "${ex}".`);
      error = ex;
    } finally {
      this.eventBus.dispatch("annotationeditorlayerrendered", {
        source: this,
        pageNumber: this.id,
        error
      });
    }
  }
  async #renderXfaLayer() {
    let error = null;
    try {
      const result = await this.xfaLayer.render(this.viewport, "display");
      if (result?.textDivs && this._textHighlighter) {
        this.#buildXfaTextContentItems(result.textDivs);
      }
    } catch (ex) {
      console.error(`#renderXfaLayer: "${ex}".`);
      error = ex;
    } finally {
      this.eventBus.dispatch("xfalayerrendered", {
        source: this,
        pageNumber: this.id,
        error
      });
    }
  }
  async #renderTextLayer() {
    const {
      pdfPage,
      textLayer,
      viewport
    } = this;
    if (!textLayer) {
      return;
    }
    let error = null;
    try {
      if (!textLayer.renderingDone) {
        const readableStream = pdfPage.streamTextContent({
          includeMarkedContent: true
        });
        textLayer.setTextContentSource(readableStream);
      }
      await textLayer.render(viewport);
    } catch (ex) {
      if (ex instanceof _pdf.AbortException) {
        return;
      }
      console.error(`#renderTextLayer: "${ex}".`);
      error = ex;
    }
    this.eventBus.dispatch("textlayerrendered", {
      source: this,
      pageNumber: this.id,
      numTextDivs: textLayer.numTextDivs,
      error
    });
    this.#renderStructTreeLayer();
  }
  async #renderStructTreeLayer() {
    if (!this.textLayer) {
      return;
    }
    this.structTreeLayer ||= new _struct_tree_layer_builder.StructTreeLayerBuilder();
    const tree = await (!this.structTreeLayer.renderingDone ? this.pdfPage.getStructTree() : null);
    const treeDom = this.structTreeLayer?.render(tree);
    if (treeDom) {
      this.canvas?.append(treeDom);
    }
  }
  async #buildXfaTextContentItems(textDivs) {
    const text = await this.pdfPage.getTextContent();
    const items = [];
    for (const item of text.items) {
      items.push(item.str);
    }
    this._textHighlighter.setTextMapping(textDivs, items);
    this._textHighlighter.enable();
  }
  _resetZoomLayer(removeFromDOM = false) {
    if (!this.zoomLayer) {
      return;
    }
    const zoomLayerCanvas = this.zoomLayer.firstChild;
    this.paintedViewportMap.delete(zoomLayerCanvas);
    zoomLayerCanvas.width = 0;
    zoomLayerCanvas.height = 0;
    if (removeFromDOM) {
      this.zoomLayer.remove();
    }
    this.zoomLayer = null;
  }
  reset({
    keepZoomLayer = false,
    keepAnnotationLayer = false,
    keepAnnotationEditorLayer = false,
    keepXfaLayer = false,
    keepTextLayer = false
  } = {}) {
    this.cancelRendering({
      keepAnnotationLayer,
      keepAnnotationEditorLayer,
      keepXfaLayer,
      keepTextLayer
    });
    this.renderingState = _ui_utils.RenderingStates.INITIAL;
    const div = this.div;
    const childNodes = div.childNodes,
      zoomLayerNode = keepZoomLayer && this.zoomLayer || null,
      annotationLayerNode = keepAnnotationLayer && this.annotationLayer?.div || null,
      annotationEditorLayerNode = keepAnnotationEditorLayer && this.annotationEditorLayer?.div || null,
      xfaLayerNode = keepXfaLayer && this.xfaLayer?.div || null,
      textLayerNode = keepTextLayer && this.textLayer?.div || null;
    for (let i = childNodes.length - 1; i >= 0; i--) {
      const node = childNodes[i];
      switch (node) {
        case zoomLayerNode:
        case annotationLayerNode:
        case annotationEditorLayerNode:
        case xfaLayerNode:
        case textLayerNode:
        case this.loadingIconDiv:
          continue;
      }
      node.remove();
    }
    div.removeAttribute("data-loaded");
    if (annotationLayerNode) {
      this.annotationLayer.hide();
    }
    if (annotationEditorLayerNode) {
      this.annotationEditorLayer.hide();
    }
    if (xfaLayerNode) {
      this.xfaLayer.hide();
    }
    if (textLayerNode) {
      this.textLayer.hide();
    }
    if (!zoomLayerNode) {
      if (this.canvas) {
        this.paintedViewportMap.delete(this.canvas);
        this.canvas.width = 0;
        this.canvas.height = 0;
        delete this.canvas;
      }
      this._resetZoomLayer();
    }
    if (this.svg) {
      this.paintedViewportMap.delete(this.svg);
      delete this.svg;
    }
    if (!this.loadingIconDiv) {
      this.loadingIconDiv = document.createElement("div");
      this.loadingIconDiv.className = "loadingIcon notVisible";
      this.loadingIconDiv.setAttribute("role", "img");
      this.l10n.get("loading").then(msg => {
        this.loadingIconDiv?.setAttribute("aria-label", msg);
      });
      div.append(this.loadingIconDiv);
    }
  }
  update({
    scale = 0,
    rotation = null,
    optionalContentConfigPromise = null,
    drawingDelay = -1
  }) {
    this.scale = scale || this.scale;
    if (typeof rotation === "number") {
      this.rotation = rotation;
    }
    if (optionalContentConfigPromise instanceof Promise) {
      this._optionalContentConfigPromise = optionalContentConfigPromise;
      optionalContentConfigPromise.then(optionalContentConfig => {
        if (optionalContentConfigPromise !== this._optionalContentConfigPromise) {
          return;
        }
        this.#useThumbnailCanvas.initialOptionalContent = optionalContentConfig.hasInitialVisibility;
      });
    }
    const totalRotation = (this.rotation + this.pdfPageRotate) % 360;
    this.viewport = this.viewport.clone({
      scale: this.scale * _pdf.PixelsPerInch.PDF_TO_CSS_UNITS,
      rotation: totalRotation
    });
    this.#setDimensions();
    if (this._isStandalone) {
      _ui_utils.docStyle.setProperty("--scale-factor", this.viewport.scale);
    }
    if (this.svg) {
      this.cssTransform({
        target: this.svg,
        redrawAnnotationLayer: true,
        redrawAnnotationEditorLayer: true,
        redrawXfaLayer: true,
        redrawTextLayer: true
      });
      this.eventBus.dispatch("pagerendered", {
        source: this,
        pageNumber: this.id,
        cssTransform: true,
        timestamp: performance.now(),
        error: this._renderError
      });
      return;
    }
    let isScalingRestricted = false;
    if (this.canvas && this.maxCanvasPixels > 0) {
      const outputScale = this.outputScale;
      if ((Math.floor(this.viewport.width) * outputScale.sx | 0) * (Math.floor(this.viewport.height) * outputScale.sy | 0) > this.maxCanvasPixels) {
        isScalingRestricted = true;
      }
    }
    const postponeDrawing = drawingDelay >= 0 && drawingDelay < 1000;
    if (this.canvas) {
      if (postponeDrawing || this.useOnlyCssZoom || this.hasRestrictedScaling && isScalingRestricted) {
        if (postponeDrawing && this.renderingState !== _ui_utils.RenderingStates.FINISHED) {
          this.cancelRendering({
            keepZoomLayer: true,
            keepAnnotationLayer: true,
            keepAnnotationEditorLayer: true,
            keepXfaLayer: true,
            keepTextLayer: true,
            cancelExtraDelay: drawingDelay
          });
          this.renderingState = _ui_utils.RenderingStates.FINISHED;
        }
        this.cssTransform({
          target: this.canvas,
          redrawAnnotationLayer: true,
          redrawAnnotationEditorLayer: true,
          redrawXfaLayer: true,
          redrawTextLayer: !postponeDrawing,
          hideTextLayer: postponeDrawing
        });
        this.eventBus.dispatch("pagerendered", {
          source: this,
          pageNumber: this.id,
          cssTransform: true,
          timestamp: performance.now(),
          error: this._renderError
        });
        return;
      }
      if (!this.zoomLayer && !this.canvas.hidden) {
        this.zoomLayer = this.canvas.parentNode;
        this.zoomLayer.style.position = "absolute";
      }
    }
    if (this.zoomLayer) {
      this.cssTransform({
        target: this.zoomLayer.firstChild
      });
    }
    this.reset({
      keepZoomLayer: true,
      keepAnnotationLayer: true,
      keepAnnotationEditorLayer: true,
      keepXfaLayer: true,
      keepTextLayer: true
    });
  }
  cancelRendering({
    keepAnnotationLayer = false,
    keepAnnotationEditorLayer = false,
    keepXfaLayer = false,
    keepTextLayer = false,
    cancelExtraDelay = 0
  } = {}) {
    if (this.paintTask) {
      this.paintTask.cancel(cancelExtraDelay);
      this.paintTask = null;
    }
    this.resume = null;
    if (this.textLayer && (!keepTextLayer || !this.textLayer.div)) {
      this.textLayer.cancel();
      this.textLayer = null;
    }
    if (this.structTreeLayer && !this.textLayer) {
      this.structTreeLayer = null;
    }
    if (this.annotationLayer && (!keepAnnotationLayer || !this.annotationLayer.div)) {
      this.annotationLayer.cancel();
      this.annotationLayer = null;
      this._annotationCanvasMap = null;
    }
    if (this.annotationEditorLayer && (!keepAnnotationEditorLayer || !this.annotationEditorLayer.div)) {
      this.annotationEditorLayer.cancel();
      this.annotationEditorLayer = null;
    }
    if (this.xfaLayer && (!keepXfaLayer || !this.xfaLayer.div)) {
      this.xfaLayer.cancel();
      this.xfaLayer = null;
      this._textHighlighter?.disable();
    }
  }
  cssTransform({
    target,
    redrawAnnotationLayer = false,
    redrawAnnotationEditorLayer = false,
    redrawXfaLayer = false,
    redrawTextLayer = false,
    hideTextLayer = false
  }) {
    if (target instanceof HTMLCanvasElement) {
      if (!target.hasAttribute("zooming")) {
        target.setAttribute("zooming", true);
        const {
          style
        } = target;
        style.width = style.height = "";
      }
    } else {
      const div = this.div;
      const {
        width,
        height
      } = this.viewport;
      target.style.width = target.parentNode.style.width = div.style.width = Math.floor(width) + "px";
      target.style.height = target.parentNode.style.height = div.style.height = Math.floor(height) + "px";
    }
    const originalViewport = this.paintedViewportMap.get(target);
    if (this.viewport !== originalViewport) {
      const relativeRotation = this.viewport.rotation - originalViewport.rotation;
      const absRotation = Math.abs(relativeRotation);
      let scaleX = 1,
        scaleY = 1;
      if (absRotation === 90 || absRotation === 270) {
        const {
          width,
          height
        } = this.viewport;
        scaleX = height / width;
        scaleY = width / height;
      }
      if (absRotation !== 0) {
        target.style.transform = `rotate(${relativeRotation}deg) scale(${scaleX}, ${scaleY})`;
      }
    }
    if (redrawAnnotationLayer && this.annotationLayer) {
      this.#renderAnnotationLayer();
    }
    if (redrawAnnotationEditorLayer && this.annotationEditorLayer) {
      this.#renderAnnotationEditorLayer();
    }
    if (redrawXfaLayer && this.xfaLayer) {
      this.#renderXfaLayer();
    }
    if (this.textLayer) {
      if (hideTextLayer) {
        this.textLayer.hide();
      } else if (redrawTextLayer) {
        this.#renderTextLayer();
      }
    }
  }
  get width() {
    return this.viewport.width;
  }
  get height() {
    return this.viewport.height;
  }
  getPagePoint(x, y) {
    return this.viewport.convertToPdfPoint(x, y);
  }
  draw() {
    if (this.renderingState !== _ui_utils.RenderingStates.INITIAL) {
      console.error("Must be in new state before drawing");
      this.reset();
    }
    const {
      div,
      pdfPage
    } = this;
    if (!pdfPage) {
      this.renderingState = _ui_utils.RenderingStates.FINISHED;
      return Promise.reject(new Error("pdfPage is not loaded"));
    }
    this.renderingState = _ui_utils.RenderingStates.RUNNING;
    const canvasWrapper = document.createElement("div");
    canvasWrapper.classList.add("canvasWrapper");
    div.append(canvasWrapper);
    if (!this.textLayer && this.textLayerMode !== _ui_utils.TextLayerMode.DISABLE && !pdfPage.isPureXfa) {
      this._accessibilityManager ||= new _text_accessibility.TextAccessibilityManager();
      this.textLayer = new _text_layer_builder.TextLayerBuilder({
        highlighter: this._textHighlighter,
        accessibilityManager: this._accessibilityManager,
        isOffscreenCanvasSupported: this.isOffscreenCanvasSupported
      });
      div.append(this.textLayer.div);
    }
    if (!this.annotationLayer && this.#annotationMode !== _pdf.AnnotationMode.DISABLE) {
      const {
        annotationStorage,
        downloadManager,
        enableScripting,
        fieldObjectsPromise,
        hasJSActionsPromise,
        linkService
      } = this.#layerProperties();
      this._annotationCanvasMap ||= new Map();
      this.annotationLayer = new _annotation_layer_builder.AnnotationLayerBuilder({
        pageDiv: div,
        pdfPage,
        annotationStorage,
        imageResourcesPath: this.imageResourcesPath,
        renderForms: this.#annotationMode === _pdf.AnnotationMode.ENABLE_FORMS,
        linkService,
        downloadManager,
        l10n: this.l10n,
        enableScripting,
        hasJSActionsPromise,
        fieldObjectsPromise,
        annotationCanvasMap: this._annotationCanvasMap,
        accessibilityManager: this._accessibilityManager
      });
    }
    if (this.xfaLayer?.div) {
      div.append(this.xfaLayer.div);
    }
    let renderContinueCallback = null;
    if (this.renderingQueue) {
      renderContinueCallback = cont => {
        if (!this.renderingQueue.isHighestPriority(this)) {
          this.renderingState = _ui_utils.RenderingStates.PAUSED;
          this.resume = () => {
            this.renderingState = _ui_utils.RenderingStates.RUNNING;
            cont();
          };
          return;
        }
        cont();
      };
    }
    const finishPaintTask = async (error = null) => {
      if (paintTask === this.paintTask) {
        this.paintTask = null;
      }
      if (error instanceof _pdf.RenderingCancelledException) {
        this._renderError = null;
        return;
      }
      this._renderError = error;
      this.renderingState = _ui_utils.RenderingStates.FINISHED;
      this._resetZoomLayer(true);
      this.#useThumbnailCanvas.regularAnnotations = !paintTask.separateAnnots;
      this.eventBus.dispatch("pagerendered", {
        source: this,
        pageNumber: this.id,
        cssTransform: false,
        timestamp: performance.now(),
        error: this._renderError
      });
      if (error) {
        throw error;
      }
    };
    const paintTask = this.renderer === _ui_utils.RendererType.SVG ? this.paintOnSvg(canvasWrapper) : this.paintOnCanvas(canvasWrapper);
    paintTask.onRenderContinue = renderContinueCallback;
    this.paintTask = paintTask;
    const resultPromise = paintTask.promise.then(() => {
      return finishPaintTask(null).then(async () => {
        this.#renderTextLayer();
        if (this.annotationLayer) {
          await this.#renderAnnotationLayer();
        }
        if (!this.annotationEditorLayer) {
          const {
            annotationEditorUIManager
          } = this.#layerProperties();
          if (!annotationEditorUIManager) {
            return;
          }
          this.annotationEditorLayer = new _annotation_editor_layer_builder.AnnotationEditorLayerBuilder({
            uiManager: annotationEditorUIManager,
            pageDiv: div,
            pdfPage,
            l10n: this.l10n,
            accessibilityManager: this._accessibilityManager
          });
        }
        this.#renderAnnotationEditorLayer();
      });
    }, function (reason) {
      return finishPaintTask(reason);
    });
    if (pdfPage.isPureXfa) {
      if (!this.xfaLayer) {
        const {
          annotationStorage,
          linkService
        } = this.#layerProperties();
        this.xfaLayer = new _xfa_layer_builder.XfaLayerBuilder({
          pageDiv: div,
          pdfPage,
          annotationStorage,
          linkService
        });
      }
      this.#renderXfaLayer();
    }
    div.setAttribute("data-loaded", true);
    this.eventBus.dispatch("pagerender", {
      source: this,
      pageNumber: this.id
    });
    return resultPromise;
  }
  paintOnCanvas(canvasWrapper) {
    const renderCapability = (0, _pdf.createPromiseCapability)();
    const result = {
      promise: renderCapability.promise,
      onRenderContinue(cont) {
        cont();
      },
      cancel(extraDelay = 0) {
        renderTask.cancel(extraDelay);
      },
      get separateAnnots() {
        return renderTask.separateAnnots;
      }
    };
    const viewport = this.viewport;
    const {
      width,
      height
    } = viewport;
    const canvas = document.createElement("canvas");
    canvas.setAttribute("role", "presentation");
    canvas.hidden = true;
    let isCanvasHidden = true;
    const showCanvas = function () {
      if (isCanvasHidden) {
        canvas.hidden = false;
        isCanvasHidden = false;
      }
    };
    canvasWrapper.append(canvas);
    this.canvas = canvas;
    const ctx = canvas.getContext("2d", {
      alpha: false
    });
    const outputScale = this.outputScale = new _ui_utils.OutputScale();
    if (this.useOnlyCssZoom) {
      const actualSizeViewport = viewport.clone({
        scale: _pdf.PixelsPerInch.PDF_TO_CSS_UNITS
      });
      outputScale.sx *= actualSizeViewport.width / width;
      outputScale.sy *= actualSizeViewport.height / height;
    }
    if (this.maxCanvasPixels > 0) {
      const pixelsInViewport = width * height;
      const maxScale = Math.sqrt(this.maxCanvasPixels / pixelsInViewport);
      if (outputScale.sx > maxScale || outputScale.sy > maxScale) {
        outputScale.sx = maxScale;
        outputScale.sy = maxScale;
        this.hasRestrictedScaling = true;
      } else {
        this.hasRestrictedScaling = false;
      }
    }
    const sfx = (0, _ui_utils.approximateFraction)(outputScale.sx);
    const sfy = (0, _ui_utils.approximateFraction)(outputScale.sy);
    canvas.width = (0, _ui_utils.roundToDivide)(viewport.width * outputScale.sx, sfx[0]);
    canvas.height = (0, _ui_utils.roundToDivide)(viewport.height * outputScale.sy, sfy[0]);
    const {
      style
    } = canvas;
    style.width = (0, _ui_utils.roundToDivide)(viewport.width, sfx[1]) + "px";
    style.height = (0, _ui_utils.roundToDivide)(viewport.height, sfy[1]) + "px";
    this.paintedViewportMap.set(canvas, viewport);
    const transform = outputScale.scaled ? [outputScale.sx, 0, 0, outputScale.sy, 0, 0] : null;
    const renderContext = {
      canvasContext: ctx,
      transform,
      viewport,
      annotationMode: this.#annotationMode,
      optionalContentConfigPromise: this._optionalContentConfigPromise,
      annotationCanvasMap: this._annotationCanvasMap,
      pageColors: this.pageColors
    };
    const renderTask = this.pdfPage.render(renderContext);
    renderTask.onContinue = function (cont) {
      showCanvas();
      if (result.onRenderContinue) {
        result.onRenderContinue(cont);
      } else {
        cont();
      }
    };
    renderTask.promise.then(function () {
      showCanvas();
      renderCapability.resolve();
    }, function (error) {
      showCanvas();
      renderCapability.reject(error);
    });
    return result;
  }
  paintOnSvg(wrapper) {
    let cancelled = false;
    const ensureNotCancelled = () => {
      if (cancelled) {
        throw new _pdf.RenderingCancelledException(`Rendering cancelled, page ${this.id}`, "svg");
      }
    };
    const pdfPage = this.pdfPage;
    const actualSizeViewport = this.viewport.clone({
      scale: _pdf.PixelsPerInch.PDF_TO_CSS_UNITS
    });
    const promise = pdfPage.getOperatorList({
      annotationMode: this.#annotationMode
    }).then(opList => {
      ensureNotCancelled();
      const svgGfx = new _pdf.SVGGraphics(pdfPage.commonObjs, pdfPage.objs);
      return svgGfx.getSVG(opList, actualSizeViewport).then(svg => {
        ensureNotCancelled();
        this.svg = svg;
        this.paintedViewportMap.set(svg, actualSizeViewport);
        svg.style.width = wrapper.style.width;
        svg.style.height = wrapper.style.height;
        this.renderingState = _ui_utils.RenderingStates.FINISHED;
        wrapper.append(svg);
      });
    });
    return {
      promise,
      onRenderContinue(cont) {
        cont();
      },
      cancel() {
        cancelled = true;
      },
      get separateAnnots() {
        return false;
      }
    };
  }
  setPageLabel(label) {
    this.pageLabel = typeof label === "string" ? label : null;
    if (this.pageLabel !== null) {
      this.div.setAttribute("data-page-label", this.pageLabel);
    } else {
      this.div.removeAttribute("data-page-label");
    }
  }
  get thumbnailCanvas() {
    const {
      initialOptionalContent,
      regularAnnotations
    } = this.#useThumbnailCanvas;
    return initialOptionalContent && regularAnnotations ? this.canvas : null;
  }
}
exports.PDFPageView = PDFPageView;