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OpenHathi-SI-v0.1
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OpenHathi-SI-v0.1
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/* global window, document */
import * as svelteInternal from 'svelte/internal'
// NOTE from 3.38.3 (or so), insert was carrying the hydration logic, that must
// be used because DOM elements are reused more (and so insertion points are not
// necessarily added in order); then in 3.40 the logic was moved to
// insert_hydration, which is the one we must use for HMR
const svelteInsert = svelteInternal.insert_hydration || svelteInternal.insert
if (!svelteInsert) {
  throw new Error(
    'failed to find insert_hydration and insert in svelte/internal'
  )
}

import ErrorOverlay from './overlay.js'

const removeElement = el => el && el.parentNode && el.parentNode.removeChild(el)

export const adapter = class ProxyAdapterDom {
  constructor(instance) {
    this.instance = instance
    this.insertionPoint = null

    this.afterMount = this.afterMount.bind(this)
    this.rerender = this.rerender.bind(this)

    this._noOverlay = !!instance.hotOptions.noOverlay
  }

  // NOTE overlay is only created before being actually shown to help test
  // runner (it won't have to account for error overlay when running assertions
  // about the contents of the rendered page)
  static getErrorOverlay(noCreate = false) {
    if (!noCreate && !this.errorOverlay) {
      this.errorOverlay = ErrorOverlay()
    }
    return this.errorOverlay
  }

  // TODO this is probably unused now: remove in next breaking release
  static renderCompileError(message) {
    const noCreate = !message
    const overlay = this.getErrorOverlay(noCreate)
    if (!overlay) return
    overlay.setCompileError(message)
  }

  dispose() {
    // Component is being destroyed, detaching is not optional in Svelte3's
    // component API, so we can dispose of the insertion point in every case.
    if (this.insertionPoint) {
      removeElement(this.insertionPoint)
      this.insertionPoint = null
    }
    this.clearError()
  }

  // NOTE afterMount CAN be called multiple times (e.g. keyed list)
  afterMount(target, anchor) {
    const {
      instance: { debugName },
    } = this
    if (!this.insertionPoint) {
      this.insertionPoint = document.createComment(debugName)
    }
    svelteInsert(target, this.insertionPoint, anchor)
  }

  rerender() {
    this.clearError()
    const {
      instance: { refreshComponent },
      insertionPoint,
    } = this
    if (!insertionPoint) {
      throw new Error('Cannot rerender: missing insertion point')
    }
    refreshComponent(insertionPoint.parentNode, insertionPoint)
  }

  renderError(err) {
    if (this._noOverlay) return
    const {
      instance: { debugName },
    } = this
    const title = debugName || err.moduleName || 'Error'
    this.constructor.getErrorOverlay().addError(err, title)
  }

  clearError() {
    if (this._noOverlay) return
    const overlay = this.constructor.getErrorOverlay(true)
    if (!overlay) return
    overlay.clearErrors()
  }
}

// TODO this is probably unused now: remove in next breaking release
if (typeof window !== 'undefined') {
  window.__SVELTE_HMR_ADAPTER = adapter
}

// mitigate situation with Snowpack remote source pulling latest of runtime,
// but using previous version of the Node code transform in the plugin
// see: https://github.com/rixo/svelte-hmr/issues/27
export default adapter