Method setLoadedDroppedFileHandler

external/.scrollLibs.js:24211–24268

(callback, helpText = "")

    document.activeElement.blur()
  }
  setLoadedDroppedFileHandler(callback, helpText = "") {
    const bodyStumpParticle = this.getBodyStumpParticle()
    const bodyShadow = bodyStumpParticle.getShadow()
    // Added the below to ensure dragging from the chrome downloads bar works
    // http://stackoverflow.com/questions/19526430/drag-and-drop-file-uploads-from-chrome-downloads-bar
    const handleChromeBug = event => {
      const originalEvent = event.originalEvent
      const effect = originalEvent.dataTransfer.effectAllowed
      originalEvent.dataTransfer.dropEffect = effect === "move" || effect === "linkMove" ? "move" : "copy"
    }
    const dragoverHandler = event => {
      handleChromeBug(event)
      event.preventDefault()
      event.stopPropagation()
      if (!bodyStumpParticle.stumpParticleHasClass("dragOver")) {
        bodyStumpParticle.insertChildParticle(`div ${helpText}
 id dragOverHelp`)
        bodyStumpParticle.addClassToStumpParticle("dragOver")
        // Add the help, and then hopefull we'll get a dragover event on the dragOverHelp, then
        // 50ms later, add the dragleave handler, and from now on drag leave will only happen on the help
        // div
        setTimeout(function () {
          bodyShadow.onShadowEvent(BrowserEvents.dragleave, dragleaveHandler)
        }, 50)
      }
    }
    const dragleaveHandler = event => {
      event.preventDefault()
      event.stopPropagation()
      bodyStumpParticle.removeClassFromStumpParticle("dragOver")
      bodyStumpParticle.findStumpParticleByChild("id dragOverHelp").removeStumpParticle()
      bodyShadow.offShadowEvent(BrowserEvents.dragleave, dragleaveHandler)
    }
    const dropHandler = async event => {
      event.preventDefault()
      event.stopPropagation()
      bodyStumpParticle.removeClassFromStumpParticle("dragOver")
      bodyStumpParticle.findStumpParticleByChild("id dragOverHelp").removeStumpParticle()
      const droppedItems = event.originalEvent.dataTransfer.items
      // NOTE: YOU NEED TO STAY IN THE "DROP" EVENT, OTHERWISE THE DATATRANSFERITEMS MUTATE
      // (BY DESIGN) https://bugs.chromium.org/p/chromium/issues/detail?id=137231
      // DO NOT ADD AN AWAIT IN THIS LOOP. IT WILL BREAK.
      const items = []
      for (let droppedItem of droppedItems) {
        const entry = droppedItem.webkitGetAsEntry()
        items.push(this._handleDroppedEntry(entry))
      }
      const results = await Promise.all(items)
      callback(results)
    }
    bodyShadow.onShadowEvent(BrowserEvents.dragover, dragoverHandler)
    bodyShadow.onShadowEvent(BrowserEvents.drop, dropHandler)
    // todo: why do we do this?
    bodyShadow.onShadowEvent(BrowserEvents.dragenter, function (event) {
      event.preventDefault()
      event.stopPropagation()
    })
  }