transition from javascript to typescript

assets/js/theme.js

@@ -1,233 +0,0 @@
-const imagesArray = JSON.parse(document.getElementById('images_array').textContent).sort((a, b) => {
-  if (a.index < b.index) {
-    return -1
-  }
-  return 1
-})
-
-const imagesArrayLen = imagesArray.length
-
-const thresholdNum = document.getElementsByClassName('thid')
-
-const threshold = [0, 40, 80, 120, 160, 200]
-
-const thresholdSensitivity = [100, 40, 18, 14, 9, 5]
-
-const r = document.querySelector(':root')
-
-const posXArray = ['0px', '0px', '0px', '0px', '0px']
-
-const posYArray = ['0px', '0px', '0px', '0px', '0px']
-
-const layer5 = document.getElementById('layer5')
-const layer4 = document.getElementById('layer4')
-const layer3 = document.getElementById('layer3')
-const layer2 = document.getElementById('layer2')
-const layer1 = document.getElementById('layer1')
-
-let thresholdIndex = 2
-
-let globalIndex = 0
-
-let last = { x: 0, y: 0 }
-
-function sleep (ms) {
-  return new Promise(resolve => setTimeout(resolve, ms))
-}
-
-// fulfill space with zero
-function duper (num) {
-  return ('0000' + num).slice(-4)
-}
-
-// threshold display update
-function thresholdUpdate () {
-  thresholdNum.item(0).innerText = duper(threshold[thresholdIndex])
-}
-
-function footerHeightUpdate () {
-  if (window.innerWidth > 768) {
-    r.style.setProperty('--footer-height', '38px')
-  } else {
-    r.style.setProperty('--footer-height', '31px')
-  }
-}
-
-function overlayInit () {
-  // largest z index
-  document.getElementsByClassName('overlay').item(0).style.zIndex = '7'
-}
-
-const numSpan = (numOne, numTwo) => {
-  // footer index number display module
-  const footerIndex = document.getElementsByClassName('ftid')
-  const numOneString = duper(numOne)
-  const numTwoString = duper(numTwo)
-  for (let i = 0; i <= 7; i++) {
-    if (i > 3) {
-      footerIndex.item(i).innerText = numTwoString[i - 4]
-    } else {
-      footerIndex.item(i).innerText = numOneString[i]
-    }
-  }
-}
-
-// initialization
-function init () {
-  numSpan(0, imagesArrayLen)
-  thresholdUpdate()
-  footerHeightUpdate()
-  // threshold buttons initialization
-  document.getElementById('thresholdDec').addEventListener('click', function () {
-    if (thresholdIndex > 0) {
-      thresholdIndex--
-      thresholdUpdate()
-    }
-  }, { passive: true })
-
-  document.getElementById('thresholdInc').addEventListener('click', function () {
-    if (thresholdIndex < 5) {
-      thresholdIndex++
-      thresholdUpdate()
-    }
-  }, { passive: true })
-}
-
-const center = e => {
-  e.style.left = '50%'
-  if (window.innerWidth > 768) {
-    e.style.top = 'calc((100% - 38px) / 2)'
-  } else {
-    e.style.top = 'calc((100% - 31px) / 2 + 31px)'
-  }
-}
-
-const overlayCursor = e => {
-  const overlayCursor = document.getElementsByClassName('overlay_cursor').item(0)
-  overlayCursor.style.left = `${e.clientX}px`
-  overlayCursor.style.top = `${e.clientY}px`
-}
-
-const FIFO = element => {
-  function layerProcess (layerL, layerH) {
-    if (layerL.childElementCount) layerL.removeChild(layerL.lastElementChild)
-    if (layerH.childElementCount) layerL.appendChild(layerH.lastElementChild.cloneNode(true))
-  }
-  layerProcess(layer1, layer2)
-  layerProcess(layer2, layer3)
-  layerProcess(layer3, layer4)
-  layerProcess(layer4, layer5)
-  if (layer5.childElementCount) layer5.removeChild(layer5.lastElementChild)
-  layer5.appendChild(element)
-}
-
-const posCache = (x, y) => {
-  // pop element if length surpass limitation
-  posXArray.shift()
-  posYArray.shift()
-  // push new element
-  posXArray.push(`${x}px`)
-  posYArray.push(`${y}px`)
-}
-
-function layersPosSet () {
-  function posSet (layer, index) {
-    layer.style.left = posXArray[index]
-    layer.style.top = posYArray[index]
-  }
-  posSet(layer5, 4)
-  posSet(layer4, 3)
-  posSet(layer3, 2)
-  posSet(layer2, 1)
-  posSet(layer1, 0)
-}
-
-// let specified image show
-const activate = (index, x, y) => {
-  const img = document.createElement('img')
-  img.setAttribute('src', imagesArray[index].url)
-  img.setAttribute('alt', imagesArray[index].index)
-  img.setAttribute('height', imagesArray[index].height)
-  img.setAttribute('width', imagesArray[index].width)
-  posCache(x, y)
-  layersPosSet()
-  FIFO(img)
-  // top
-  layer5.addEventListener('click', () => {
-    // stop images animation
-    window.removeEventListener('mousemove', handleOnMove)
-    // set top image
-    center(layer5)
-    layer5.dataset.status = 't0'
-    layer4.dataset.status = 't1'
-    layer3.dataset.status = 't2'
-    layer2.dataset.status = 't3'
-    layer1.dataset.status = 't4'
-    // overlay init
-    overlayInit()
-    window.addEventListener('mousemove', overlayCursor)
-  }, {
-    passive: true,
-    once: true
-  })
-
-  last = { x, y }
-}
-
-// absolute distance calculation
-const distanceFromLast = (x, y) => {
-  return Math.hypot(x - last.x, y - last.y)
-}
-
-// move handler
-const handleOnMove = e => {
-  if (distanceFromLast(e.clientX, e.clientY) > (window.innerWidth / thresholdSensitivity[thresholdIndex])) {
-    // images showing array
-    const imageIndex = globalIndex % imagesArrayLen
-    // show top image and change index
-    activate(imageIndex, e.clientX, e.clientY)
-    numSpan((imageIndex + 1), imagesArrayLen)
-    // self increment
-    globalIndex++
-  }
-}
-
-init()
-
-window.addEventListener('mousemove', handleOnMove)
-window.addEventListener('resize', () => {
-  const isTop = document.getElementsByClassName('top')
-  if (isTop.length) {
-    center(isTop.item(0))
-  }
-  footerHeightUpdate()
-})
-
-document.getElementsByClassName('prev_section').item(0).addEventListener('mouseover', () => {
-  document.getElementsByClassName('overlay_cursor').item(0).innerText = 'PREV'
-})
-
-document.getElementsByClassName('close_section').item(0).addEventListener('click', async function f () {
-  document.getElementsByClassName('overlay').item(0).style.zIndex = '-1'
-  layersPosSet()
-  layer5.dataset.status = 'r0'
-  layer4.dataset.status = 'r1'
-  layer3.dataset.status = 'r2'
-  layer2.dataset.status = 'r3'
-  layer1.dataset.status = 'r4'
-  await sleep(2500)
-  layer5.dataset.status = 'null'
-  layer4.dataset.status = 'null'
-  layer3.dataset.status = 'null'
-  layer2.dataset.status = 'null'
-  layer1.dataset.status = 'null'
-  window.addEventListener('mousemove', handleOnMove)
-})
-
-document.getElementsByClassName('close_section').item(0).addEventListener('mouseover', () => {
-  document.getElementsByClassName('overlay_cursor').item(0).innerText = 'CLOSE'
-})
-
-document.getElementsByClassName('next_section').item(0).addEventListener('mouseover', () => {
-  document.getElementsByClassName('overlay_cursor').item(0).innerText = 'NEXT'
-})

assets/ts/indexDisp.ts

@@ -0,0 +1,17 @@
+import { duper } from './utils'
+
+// update index of displaying image
+export function imgIndexSpanUpdate(numOne: number, numTwo: number): void {
+  // footer index number display module
+  const footerIndexDisp = document.getElementsByClassName('ftid')
+  const numOneString: string = duper(numOne)
+  const numTwoString: string = duper(numTwo)
+  for (let i: number = 0; i <= 7; i++) {
+    const footerIndex = footerIndexDisp[i] as HTMLSpanElement
+    if (i > 3) {
+      footerIndex.innerText = numTwoString[i - 4]
+    } else {
+      footerIndex.innerText = numOneString[i]
+    }
+  }
+}

assets/ts/main.ts

@@ -0,0 +1,13 @@
+import { footerHeightUpdateInit } from './utils'
+import { imgIndexSpanUpdate } from './indexDisp'
+import { imagesArrayLen, trackMouseInit } from './trackMouse'
+import { thresholdCtlInit } from './thresholdCtl'
+
+function init(): void {
+  footerHeightUpdateInit()
+  imgIndexSpanUpdate(0, imagesArrayLen)
+  thresholdCtlInit()
+  trackMouseInit()
+}
+
+init()

assets/ts/overlay.ts

@@ -0,0 +1,85 @@
+import { delay, removeAllEventListeners, layersPosSet } from './utils'
+import { posArray, layers, handleOnMove } from './trackMouse'
+
+// get components of overlay
+const overlay = document.getElementsByClassName('overlay').item(0) as HTMLDivElement
+let closeSection = document.getElementsByClassName('close_section').item(0) as Node
+let prevSection = document.getElementsByClassName('prev_section').item(0) as Node
+let nextSection = document.getElementsByClassName('next_section').item(0) as Node
+const cursor = document
+  .getElementsByClassName('overlay_cursor')
+  .item(0) as HTMLDivElement
+
+// set cursor text
+function setCursorText(text: string): void {
+  cursor.innerText = text
+}
+
+// overlay cursor event handler
+const overlayCursor = (e: MouseEvent): void => {
+  cursor.style.left = `${e.clientX}px`
+  cursor.style.top = `${e.clientY}px`
+}
+
+function disableListener(): void {
+  window.removeEventListener('mousemove', overlayCursor)
+  closeSection = removeAllEventListeners(closeSection)
+  prevSection = removeAllEventListeners(prevSection)
+  nextSection = removeAllEventListeners(nextSection)
+}
+
+export function overlayEnable(): void {
+  overlay.style.zIndex = '7'
+  setListener()
+}
+
+export function overlayDisable(): void {
+  overlay.style.zIndex = '-1'
+  disableListener()
+}
+
+async function handleCloseClick(): Promise<void> {
+  overlayDisable()
+  layersPosSet(posArray, layers)
+  for (let i: number = 4; i >= 0; i--) {
+    layers[i].dataset.status = `r${4 - i}`
+  }
+  await delay(2500)
+  for (let i: number = 4; i >= 0; i--) {
+    layers[i].dataset.status = 'null'
+  }
+  window.addEventListener('mousemove', handleOnMove)
+}
+
+// set hover event listener
+function setListener(): void {
+  window.addEventListener('mousemove', overlayCursor, { passive: true })
+  closeSection.addEventListener(
+    'mouseover',
+    () => {
+      setCursorText('CLOSE')
+    },
+    { passive: true }
+  )
+  closeSection.addEventListener(
+    'click',
+    () => {
+      void handleCloseClick()
+    },
+    { passive: true }
+  )
+  prevSection.addEventListener(
+    'mouseover',
+    () => {
+      setCursorText('PREV')
+    },
+    { passive: true }
+  )
+  nextSection.addEventListener(
+    'mouseover',
+    () => {
+      setCursorText('NEXT')
+    },
+    { passive: true }
+  )
+}

assets/ts/thresholdCtl.ts

@@ -0,0 +1,40 @@
+import { duper } from './utils'
+
+// get threshold display element
+const thresholdDisp = document.getElementsByClassName('thid').item(0) as HTMLSpanElement
+
+// threshold data
+const threshold: number[] = [0, 40, 80, 120, 160, 200]
+export const thresholdSensitivityArray: number[] = [100, 40, 18, 14, 9, 5]
+export let thresholdIndex: number = 2
+
+function thresholdUpdate(): void {
+  thresholdDisp.innerText = duper(threshold[thresholdIndex])
+}
+
+export function thresholdCtlInit(): void {
+  thresholdUpdate()
+  const dec = document.getElementById('thresholdDec') as HTMLButtonElement
+  dec.addEventListener(
+    'click',
+    function () {
+      if (thresholdIndex > 0) {
+        thresholdIndex--
+        thresholdUpdate()
+      }
+    },
+    { passive: true }
+  )
+
+  const inc = document.getElementById('thresholdInc') as HTMLButtonElement
+  inc.addEventListener(
+    'click',
+    function () {
+      if (thresholdIndex < 5) {
+        thresholdIndex++
+        thresholdUpdate()
+      }
+    },
+    { passive: true }
+  )
+}

assets/ts/trackMouse.ts

@@ -0,0 +1,107 @@
+import { overlayEnable } from './overlay'
+import { posCache, FIFO, layersPosSet, center } from './utils'
+import { thresholdSensitivityArray, thresholdIndex } from './thresholdCtl'
+import { imgIndexSpanUpdate } from './indexDisp'
+
+interface ImageData {
+  index: string
+  url: string
+  imgH: string
+  imgW: string
+}
+
+export interface position {
+  x: number
+  y: number
+}
+
+// get images info from JSON
+const imageArrayElement = document.getElementById('images_array') as HTMLElement
+const rawImageArray = imageArrayElement.textContent as string
+export const imagesArray: ImageData[] = JSON.parse(rawImageArray).sort(
+  (a: ImageData, b: ImageData) => {
+    if (a.index < b.index) {
+      return -1
+    }
+    return 1
+  }
+)
+export const imagesArrayLen: number = imagesArray.length
+
+// get layer divs
+const layer5 = document.getElementById('layer5') as HTMLDivElement
+const layer4 = document.getElementById('layer4') as HTMLDivElement
+const layer3 = document.getElementById('layer3') as HTMLDivElement
+const layer2 = document.getElementById('layer2') as HTMLDivElement
+const layer1 = document.getElementById('layer1') as HTMLDivElement
+export const layers: HTMLDivElement[] = [layer1, layer2, layer3, layer4, layer5]
+
+// layers position caching
+export const posArray: string[][] = [
+  ['0px', '0px', '0px', '0px', '0px'],
+  ['0px', '0px', '0px', '0px', '0px']
+]
+
+// global index for "activated"
+let globalIndex: number = 0
+
+// last position set as "activated"
+let last: position = { x: 0, y: 0 }
+
+const activate = (index: number, x: number, y: number): void => {
+  const img = document.createElement('img')
+  img.setAttribute('src', imagesArray[index].url)
+  img.setAttribute('alt', imagesArray[index].index)
+  img.setAttribute('height', imagesArray[index].imgH)
+  img.setAttribute('width', imagesArray[index].imgW)
+  posCache(x, y, posArray)
+  layersPosSet(posArray, layers)
+  FIFO(img, layers)
+  // top
+  layer5.addEventListener(
+    'click',
+    () => {
+      // stop images animation
+      window.removeEventListener('mousemove', handleOnMove)
+      // set top image
+      center(layer5)
+      layer5.dataset.status = 't0'
+      layer4.dataset.status = 't1'
+      layer3.dataset.status = 't2'
+      layer2.dataset.status = 't3'
+      layer1.dataset.status = 't4'
+      // overlay init
+      overlayEnable()
+    },
+    {
+      passive: true,
+      once: true
+    }
+  )
+
+  last = { x, y }
+}
+
+const distanceFromLast = (x: number, y: number): number => {
+  return Math.hypot(x - last.x, y - last.y)
+}
+
+export const handleOnMove = (e: MouseEvent): void => {
+  // meet threshold
+  if (
+    distanceFromLast(e.clientX, e.clientY) >
+    window.innerWidth / thresholdSensitivityArray[thresholdIndex]
+  ) {
+    // images showing array
+    const imageIndex = globalIndex % imagesArrayLen
+    // show top image and change index
+    activate(imageIndex, e.clientX, e.clientY)
+    imgIndexSpanUpdate(imageIndex + 1, imagesArrayLen)
+    // self increment
+    globalIndex++
+  }
+}
+
+export function trackMouseInit(): void {
+  window.addEventListener('mousemove', handleOnMove)
+}

assets/ts/utils.ts

@@ -0,0 +1,78 @@
+export const posCache = (x: number, y: number, xyArray: string[][]): void => {
+  // pop element if length surpass limitation
+  xyArray[0].shift()
+  xyArray[1].shift()
+  // push new element
+  xyArray[0].push(`${x}px`)
+  xyArray[1].push(`${y}px`)
+}
+
+export function duper(num: number): string {
+  return ('0000' + num.toString()).slice(-4)
+}
+
+export const FIFO = (
+  element: HTMLImageElement,
+  layersArray: HTMLDivElement[]
+): void => {
+  function layerProcess(layerL: HTMLDivElement, layerH: HTMLDivElement): void {
+    if (layerL.childElementCount !== 0)
+      layerL.removeChild(layerL.lastElementChild as HTMLImageElement)
+    if (layerH.childElementCount !== 0) {
+      const layerHNode = layerH.lastElementChild as HTMLImageElement
+      layerL.appendChild(layerHNode.cloneNode(true))
+    }
+  }
+  for (let i: number = 0; i <= 3; i++) {
+    layerProcess(layersArray[i], layersArray[i + 1])
+  }
+  if (layersArray[4].childElementCount !== 0)
+    layersArray[4].removeChild(layersArray[4].lastElementChild as HTMLImageElement)
+  layersArray[4].appendChild(element)
+}
+
+export const layersPosSet = (
+  xyArray: string[][],
+  layersArray: HTMLDivElement[]
+): void => {
+  function posSet(layer: HTMLDivElement, index: number): void {
+    layer.style.left = xyArray[0][index]
+    layer.style.top = xyArray[1][index]
+  }
+  for (let i = 4; i >= 0; i--) {
+    posSet(layersArray[i], i)
+  }
+}
+
+// eslint-disable-next-line @typescript-eslint/promise-function-async
+export function delay(ms: number): Promise<void> {
+  return new Promise((resolve) => setTimeout(resolve, ms))
+}
+
+export function removeAllEventListeners(e: Node): Node {
+  return e.cloneNode(true)
+}
+
+export const center = (e: HTMLDivElement): void => {
+  e.style.left = '50%'
+  if (window.innerWidth > 768) {
+    e.style.top = 'calc((100% - 38px) / 2)'
+  } else {
+    e.style.top = 'calc((100% - 31px) / 2 + 31px)'
+  }
+}
+
+export function footerHeightUpdateInit(): void {
+  window.addEventListener(
+    'resize',
+    () => {
+      const r = document.querySelector(':root') as HTMLElement
+      if (window.innerWidth > 768) {
+        r.style.setProperty('--footer-height', '38px')
+      } else {
+        r.style.setProperty('--footer-height', '31px')
+      }
+    },
+    { passive: true }
+  )
+}

layouts/index.html

@@ -24,7 +24,7 @@
     {{ $.Scratch.Add "img" slice }}
     {{ range . }}
       {{ $index = sub $index 1}}
-      {{ $.Scratch.Add "img" (dict "index" (string $index) "url" (string .RelPermalink) "height" (string .Height) "width" (string .Width)) }}
+      {{ $.Scratch.Add "img" (dict "index" (string $index) "url" (string .RelPermalink) "imgH" (string .Height) "imgW" (string .Width)) }}
     {{ end }}
     <script id="images_array" type="application/json">{{ $.Scratch.Get "img" | jsonify | safeJS }}</script>
   {{ end }}

layouts/partials/head.html

@@ -4,5 +4,5 @@
 {{- $style = dict "Context" . "ToCSS" $options | merge $style -}}
 {{- partial "plugin/style.html" $style -}}
 
-{{ $js := resources.Get "js/theme.js" }}
-<script type="text/javascript" src="{{ $js.RelPermalink }}" defer></script>
+{{ $script := resources.Get "ts/main.ts" | js.Build }}
+<script type="text/javascript" src="{{ $script.RelPermalink }}" defer></script>