overleaf/services/web/frontend/js/ide/pdfng/directives/pdfTextLayer.js

/* eslint-disable
    max-len,
    no-return-assign,
    no-unused-vars,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
 * decaffeinate suggestions:
 * DS102: Remove unnecessary code created because of implicit returns
 * DS207: Consider shorter variations of null checks
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
import App from '../../../base'
// uses the PDFJS text layer renderer to provide invisible overlayed
// text for searching

App.factory('pdfTextLayer', function() {
  let pdfTextLayer
  return (pdfTextLayer = class pdfTextLayer {
    constructor(options) {
      this.textLayerDiv = options.textLayerDiv
      this.divContentDone = false
      this.viewport = options.viewport
      this.textDivs = []
      this.renderer = options.renderer
      this.renderingDone = false
    }

    render(timeout) {
      if (this.renderingDone || !this.divContentDone) {
        return
      }

      if (this.textLayerRenderTask != null) {
        this.textLayerRenderTask.cancel()
        this.textLayerRenderTask = null
      }

      this.textDivs = []
      const textLayerFrag = document.createDocumentFragment()

      this.textLayerRenderTask = this.renderer({
        textContent: this.textContent,
        container: textLayerFrag,
        viewport: this.viewport,
        textDivs: this.textDivs,
        timeout,
        enhanceTextSelection: this.enhanceTextSelection
      })

      const textLayerSuccess = () => {
        this.textLayerDiv.appendChild(textLayerFrag)
        return (this.renderingDone = true)
      }

      const textLayerFailure = function() {
        // canceled or failed to render text layer -- skipping errors
      }

      return this.textLayerRenderTask.promise.then(
        textLayerSuccess,
        textLayerFailure
      )
    }

    setTextContent(textContent) {
      if (this.textLayerRenderTask) {
        this.textLayerRenderTask.cancel()
        this.textLayerRenderTask = null
      }

      this.textContent = textContent
      return (this.divContentDone = true)
    }
  })
})