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useAnimation.ts
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useAnimation.ts
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export function useAnimation() {
// types
type TWindowType = 'sm' | 'md' | 'lg'
type TParts =
| 'head-circle'
| 'head-horizontal'
| 'head-triangle'
| 'head-cross'
| 'head-photo'
| 'head-slash'
interface IParts {
type: TParts
x: number
y: number
rotate: number
src: string
key: string
}
interface IState {
patternIndex: number
t: number
tMax: number
isVisible: boolean
windowMode: TWindowType
width: number
height: number
}
// state の初期値
const state = reactive<IState>({
patternIndex: 0,
t: 0,
tMax: 27,
isVisible: false,
windowMode: 'lg',
width: 0,
height: 384,
})
// 定数
const GAP: number = 12
const GRID: number = 120
const PARTS_CREATE_TIME = 0.6
const PARTS_FADE_TIME = 0.2
// pattern を定義
const PATTERN: string[][] = [
['-⧄|⧅⧄⧅⮽⧄o', 'o⮽⧄◢-⧄⧅◥|', '⧅◣⧅⧄⧅|⧄⧅⧄'],
['1⧄|⧅o⧅⮽⧄◥', 'o⮽⧄◢⧄-⧅2|', '◥◣o⧄⧅|⧄⧅⧄'],
['1⧄|3◤⧅o⧄◥', '-⮽◢◣⧄4⧅2|', '⧅⧅o⧄⧅◤⧄◢⧄'],
['◣⧄⧅3◤⧅o⧄6', '-⮽1⧅⧄4⧅|⧄', '⧅◣o⧄2-⧄⧄⧄'],
['5⧄◣3◤⧅o⧄6', '-⮽1⧅⧄4⮽|⧄', '⧄◣o⧅2-⧄⧄⧄'],
['o⧄⧅3⧄⧅o⧄6', '-⮽1⧅⧄4⧄|⧄', '⧄◣o⧄2⧅⧄◥⮽'],
['3⧄4⧅⧄⧅⮽5o', 'o⮽⧄◤2⧄6◥|', '⧅◢⧅1⧅⧅⧄-⧄'],
]
// state の画面サイズを更新
const setWindowMode = () => {
const windowSize = window.innerWidth
if (windowSize <= 770) {
state.windowMode = 'sm'
} else if (770 < windowSize && windowSize <= 980) {
state.windowMode = 'md'
} else {
state.windowMode = 'lg'
}
}
// SVG 表示量を画面サイズによって調整
const adjustSvg = () => {
// SSR 時には SVG の表示を確定することができないため、
// 初期表示時にちらついてしまう
state.t = 0
if (state.windowMode === 'sm') {
state.width = (GRID + GAP) * 5 - GAP
state.tMax = 15
}
if (state.windowMode === 'md') {
state.width = (GRID + GAP) * 6 - GAP
state.tMax = 18
}
if (state.windowMode === 'lg') {
state.width = (GRID + GAP) * 9 - GAP
state.tMax = 27
}
}
// pattern の記号列を IParts[][] に変換
const createItems = (): IParts[][] => {
return PATTERN[state.patternIndex].map((line, row) =>
Array.from(line)
.slice(0, state.t)
.map((p, col): IParts => {
const parts: IParts = {
type: 'head-circle',
x: (GAP + GRID) / 2 + col * (GAP + GRID),
y: (GAP + GRID) / 2 + row * (GAP + GRID),
rotate: 0,
src: '',
key: `${row}-${col}`,
}
switch (p) {
case '⮽':
parts.type = 'head-cross'
break
case '⧅':
parts.type = 'head-slash'
parts.rotate = 90
break
case '⧄':
parts.type = 'head-slash'
break
case '|':
parts.type = 'head-horizontal'
parts.rotate = 90
break
case 'o':
parts.type = 'head-circle'
break
case '-':
parts.type = 'head-horizontal'
break
case '◢':
parts.type = 'head-triangle'
break
case '◥':
parts.type = 'head-triangle'
parts.rotate = 270
break
case '◣':
parts.type = 'head-triangle'
parts.rotate = 90
break
case '◤':
parts.type = 'head-triangle'
parts.rotate = 180
break
case '1':
parts.type = 'head-photo'
parts.src = 'image01.png'
break
case '2':
parts.type = 'head-photo'
parts.src = 'image02.png'
break
case '3':
parts.type = 'head-photo'
parts.src = 'image03.png'
break
case '4':
parts.type = 'head-photo'
parts.src = 'image04.png'
break
case '5':
parts.type = 'head-photo'
parts.src = 'image05.png'
break
case '6':
parts.type = 'head-photo'
parts.src = 'image06.png'
break
}
return parts
}),
)
}
const itemsFlatten = () => {
return Array.prototype.concat.apply([], createItems())
}
const transitionEnter = (el, done) => {
setTimeout(() => {
done()
}, PARTS_CREATE_TIME * 1000)
}
const transitionLeave = (el, done) => {
setTimeout(() => {
done()
}, PARTS_FADE_TIME * 1000)
}
// window サイズの変更を検知
const detectWidowChange = () => {
window.addEventListener('resize', () => {
const prevWindowMode = state.windowMode
setWindowMode()
if (prevWindowMode !== state.windowMode) {
adjustSvg()
}
})
}
// 画面表示からの時間を計測し, パターンを切り替え
onMounted(() => {
setInterval(() => {
if (state.t < state.tMax) {
state.t++
}
}, 90)
setInterval(() => {
state.patternIndex = (state.patternIndex + 1) % PATTERN.length
}, 2000)
})
// init
onMounted(() => {
setWindowMode()
adjustSvg()
detectWidowChange()
})
return {
GRID,
GAP,
state,
itemsFlatten,
transitionEnter,
transitionLeave,
}
}