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How to use PDFPageProxy method in wpt

Best JavaScript code snippet using wpt

pdfjs-text-layer.component.ts

Source:pdfjs-text-layer.component.ts

1import {Component, ElementRef, Inject, Input, OnDestroy, OnInit} from '@angular/core';2import {PDFPageProxy, PDFPageViewport, TextContent} from 'pdfjs-dist';3import {DOCUMENT} from '@angular/common';4import {PdfApi, TextLayerRenderTask} from '../../classes/pdfapi';5import {PDF_API} from '../../classes/pdfjs-objects';6@Component({7  selector: 'pdfjs-text-layer',8  template: `<div class="endOfContent"></div>`,9  styleUrls: ['./pdfjs-text-layer.component.scss']10})11export class PdfjsTextLayerComponent implements OnInit, OnDestroy {12  private innerViewport: PDFPageViewport;13  private innerPdfPageProxy: PDFPageProxy;14  private textLayerRenderTask: TextLayerRenderTask;15  constructor(@Inject(DOCUMENT) private document: Document,16              @Inject(PDF_API) private API: PdfApi,17              private elementRef: ElementRef) {18  }19  @Input()20  get viewport(): PDFPageViewport {21    return this.innerViewport;22  }23  set viewport(viewport: PDFPageViewport) {24    if (this.innerViewport !== viewport) {25      this.innerViewport = viewport;26      this.writeTextLayer();27    }28  }29  @Input()30  get pdfPageProxy(): PDFPageProxy {31    return this.innerPdfPageProxy;32  }33  set pdfPageProxy(pdfPageProxy: PDFPageProxy) {34    if (this.innerPdfPageProxy !== pdfPageProxy) {35      this.innerPdfPageProxy = pdfPageProxy;36      this.writeTextLayer();37    }38  }39  ngOnInit() {40  }41  ngOnDestroy() {42    this.cancelTextLayerRenderTask();43  }44  private cancelTextLayerRenderTask() {45    if (!!this.textLayerRenderTask && this.textLayerRenderTask.cancel) {46      this.textLayerRenderTask.cancel();47    }48  }49  private writeTextLayer() {50    this.cancelTextLayerRenderTask();51    if (!!this.viewport && !!this.pdfPageProxy) {52      const container = this.document.createDocumentFragment();53      this.pdfPageProxy.getTextContent().then((textContent: TextContent) => {54        this.textLayerRenderTask = this.API.renderTextLayer({55          textContent,56          container,57          viewport: this.viewport58        });59        this.textLayerRenderTask.promise.then(() => {60          this.clear();61          (this.elementRef.nativeElement as HTMLElement).insertBefore(container, this.elementRef.nativeElement.firstChild);62        }, (error: any) => {63          console.log('error', error);64          if (error.name !== 'RenderingCancelledException') {65            console.log('render textLayer error', error);66          }67        });68      });69    } else {70      this.clear();71    }72  }73  /**74   * Reset text layout75   */76  private clear() {77    this.elementRef.nativeElement.innerHTML = '<div class="endOfContent"></div>';78  }...

CachedPDFjsWrapper.js

Source:CachedPDFjsWrapper.js

1const pdfjs = require('pdfjs-dist/webpack');2export class CachedPDFjsWrapper {3  static cache = {};4  static renderPage(renderContext, filepath, pdfPageProxy) {5    let renderTask = pdfPageProxy.render(renderContext);6    renderTask.promise.then(() => {7      this.handleRenderCompleted(filepath, pdfPageProxy, renderTask);8    });9  }10  static unsubscribe(filepath) {11    if (filepath in this.cache) {12      this.cache[filepath]['referenceCount']--;13      if (this.cache[filepath]['referenceCount'] <= 0) {14        let pdfDocumentProxyPromise = this.cache[filepath]['PDFDocumentProxyPromise'];15        delete this.cache[filepath];16        pdfDocumentProxyPromise.then(pdfDocumentProxy => {17          pdfDocumentProxy.cleanup();18          pdfDocumentProxy.destroy();19        });20      }21    }22  }23  // åç§ã«ã¦ã³ãå½¢å¼ã®GCã¿ãããªãã®24  static handleRenderCompleted(filepath, pdfPageProxy, renderTask) {25    renderTask.cancel();26    pdfPageProxy.cleanup();27    this.unsubscribe(filepath);28  }29  static getPDFDocumentProxyPromise(filepath) {30    if (filepath in this.cache) {31      this.cache[filepath]['referenceCount']++;32      return this.cache[filepath]['PDFDocumentProxyPromise'];33    }34    let origin = new URL(window.location.href).origin;35    let url = origin + '/' + filepath;36    let loadingTask = pdfjs.getDocument(url);37    this.cache[filepath] = {};38    this.cache[filepath]['referenceCount'] = 1;39    this.cache[filepath]['PDFDocumentProxyPromise'] = new Promise(40      (resolve, reject) => {41        loadingTask.promise.then(pdfDocumentProxy => {42          resolve(pdfDocumentProxy);43        }).catch(e => reject(e));44      }45    );46    return this.cache[filepath]['PDFDocumentProxyPromise'];47  }48  static getPDFPageProxyPromise(filepath, pageNumber) {49    return new Promise((resolve, reject) => {50      this.getPDFDocumentProxyPromise(filepath).then(pdfDocumentProxy => {51        pdfDocumentProxy.getPage(pageNumber).then(pdfPageProxy => {52          resolve(pdfPageProxy);53        }).catch(e => reject(e));54      });55    });56  }...

pdf-page.ts

Source:pdf-page.ts

1import { PDFPageProxy } from 'pdfjs-dist';2import { PdfOrientation } from './pdf-orientation';3const VIEW_MAX_X_INDEX = 2;4const VIEW_MAX_Y_INDEX = 3;5// wrapper for PDFPageProxy class from pdf.js6export class PdfPage {7  private readonly pageProxy: PDFPageProxy;8  public orientation: PdfOrientation;9  constructor(pageProxy: PDFPageProxy) {10    this.pageProxy = pageProxy;11    if (this.height > this.width) {12      this.orientation = 'vertical';13    } else {14      this.orientation = 'horizontal';15    }16  }17  public get width(): number {18    return this.pageProxy.view[VIEW_MAX_X_INDEX];19  }20  public get height(): number {21    return this.pageProxy.view[VIEW_MAX_Y_INDEX];22  }23  public render(24    canvasContext: CanvasRenderingContext2D,25  ): Promise<PDFPageProxy> {26    return this.pageProxy.render({27      canvasContext,28      viewport: this.pageProxy.getViewport({ scale: 1 }),29    }).promise;30  }31  public renderScaled(canvas: HTMLCanvasElement): Promise<PDFPageProxy> {32    const currentViewport = this.pageProxy.getViewport({ scale: 1 });33    const scale = canvas.width / currentViewport.width;34    const viewport = this.pageProxy.getViewport({ scale });35    canvas.height = viewport.height;36    const canvasContext = canvas.getContext('2d');37    if (!canvasContext) {38      throw new Error('Cannot render page. Canvas context is null.');39    }40    return this.pageProxy.render({41      canvasContext: canvasContext,42      viewport,43    }).promise;44  }...

Using AI Code Generation

1var viewport = page.getViewport(scale);2var textLayerDiv = document.createElement('div');3textLayerDiv.className = 'textLayer';4textLayerDiv.style.width = viewport.width + 'px';5textLayerDiv.style.height = viewport.height + 'px';6page.getTextContent().then(function (textContent) {7    var textLayer = new TextLayerBuilder({8    });9    textLayer.setTextContent(textContent);10    textLayer.render();11});12function TextLayerBuilder(options) {13    this.textLayerDiv = options.textLayerDiv;14    this.layoutDone = false;15    this.divContentDone = false;16    this.pageIdx = options.pageIndex;17    this.matches = [];18    this.viewport = options.viewport;19    this.textDivs = [];20}21TextLayerBuilder.prototype = {22    setTextContent: function TextLayerBuilder_setTextContent(textContent) {23        this.textContent = textContent;24        this.render(TEXT_LAYER_RENDER_DELAY);25    },26    render: function TextLayerBuilder_render(timeout) {27        var self = this;28        if (!timeout) {29            timeout = 0;30        }31        if (!this.textContent) {32            return;33        }34        this.cancel();35        this.textDivs = [];36        this.renderTimer = setTimeout(function () {37            self.renderTimeout();38        }, timeout);39    },40    renderTimeout: function TextLayerBuilder_renderTimeout() {41        var textLayerFrag = document.createDocumentFragment();42        this.textContent.items.forEach(function (textItem) {43            var textDiv = document.createElement('div');44            textDiv.setAttribute('style', 'font-size: 16px; position: absolute;');45            this.textDivs.push(textDiv);46            if (textItem.str === ' ') {47                textDiv.dataset.isWhitespace = true;48            }49            appendText(textDiv, textItem.str);50            textLayerFrag.appendChild(textDiv);51        }, this);52        this.textLayerDiv.appendChild(textLayerFrag);53        this.renderTimer = null;54    },55    cancel: function TextLayerBuilder_cancel() {56        clearTimeout(this.renderTimer);57        this.renderTimer = null;58    },59    setTextContentStream: function TextLayerBuilder_setTextContentStream(readableStream) {

Using AI Code Generation

1var pdf = PDFJS.getDocument('test.pdf');2pdf.then(function(pdf) {3  pdf.getPage(1).then(function(page) {4    page.getTextContent().then(function(textContent) {5      var pageProxy = new PDFPageProxy(pdf, page.pageIndex, textContent);6      pageProxy.getTextContent().then(function(textContent) {7        console.log(textContent);8      });9    });10  });11});

Using AI Code Generation

1function renderTextLayer(page){2    var textLayerDiv = document.createElement("div");3    textLayerDiv.className = "textLayer";4    var canvas = document.getElementById("page" + (page.pageIndex + 1));5    var viewport = page.getViewport(1.0);6    textLayerDiv.style.width = viewport.width + "px";7    textLayerDiv.style.height = viewport.height + "px";8    canvas.parentNode.insertBefore(textLayerDiv, canvas);9    var textLayer = new TextLayerBuilder({10    });11    textLayer.setTextContent(page.getTextContent());12    textLayer.render();13}14function renderPageLayer(page){15    var canvas = document.getElementById("page" + (page.pageIndex + 1));16    var viewport = page.getViewport(1.0);17    var pageLayer = new PageLayerBuilder({18    });19    pageLayer.render();20}21function renderPageLayer(page){22    var canvas = document.getElementById("page" + (page.pageIndex + 1));23    var viewport = page.getViewport(1.0);24    var pageLayer = new PageLayerBuilder({25    });26    pageLayer.render();27}28function renderPageLayer(page){29    var canvas = document.getElementById("page" + (page.pageIndex + 1));30    var viewport = page.getViewport(1.0);31    var pageLayer = new PageLayerBuilder({32    });33    pageLayer.render();34}35function renderPageLayer(page){36    var canvas = document.getElementById("page" + (page.pageIndex + 1));37    var viewport = page.getViewport(1.0);38    var pageLayer = new PageLayerBuilder({39    });

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