ui/src/form/color.js

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/**
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* {color组件}
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* @author chensbox <chensbox@foxmail.com>
* @date 2023/03/20 15:17:25
*/
import {
css,
html,
bind,
unbind,
Component,
outsideClick,
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clearOutsideClick,
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nextTick,
offset
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} from 'wkit'
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// H: 色相, S: 饱和度, B/V: 亮度
export function hsb2rgb(hsb) {
var h = hsb.h
var s = Math.round((hsb.s * 255) / 100)
var v = Math.round((hsb.b * 255) / 100)
var r = 0
var g = 0
var b = 0
if (s === 0) {
r = g = b = v
} else {
var t1 = v
var t2 = ((255 - s) * v) / 255
var t3 = ((t1 - t2) * (h % 60)) / 60
//
if (h === 360) {
h = 0
}
if (h < 60) {
r = t1
g = t2 + t3
b = t2
} else if (h < 120) {
r = t1 - t3
g = t1
b = t2
} else if (h < 180) {
r = t2
g = t1
b = t2 + t3
} else if (h < 240) {
r = t2
g = t1 - t3
b = t1
} else if (h < 300) {
r = t2 + t3
g = t2
b = t1
} else if (h < 360) {
r = t1
g = t2
b = t1 - t3
}
}
r = Math.round(r)
g = Math.round(g)
b = Math.round(b)
return { r, g, b }
}
export function rgb2hex({ r, g, b }) {
return [r, g, b].map(it => it.toString(16).padStart(2, '0')).join('')
}
export function hex2rgb(hex) {
var r, g, b
hex = hex.replace(/^#/, '').split('')
if (hex.length === 3) {
r = parseInt(hex[0] + hex[0], 16)
g = parseInt(hex[1] + hex[1], 16)
b = parseInt(hex[2] + hex[2], 16)
} else {
r = parseInt(hex[0] + hex[1], 16)
g = parseInt(hex[2] + hex[3], 16)
b = parseInt(hex[4] + hex[5], 16)
}
return { r, g, b }
}
export function rgb2hsb({ r, g, b }) {
var hsb = { h: 0, s: 0, b: 0 }
var max = Math.max(r, g, b)
var min = Math.min(r, g, b)
var delta = max - min
hsb.b = max
hsb.s = max === 0 ? 0 : (delta * 255) / max
if (hsb.s === 0) {
hsb.h = -1
} else {
if (r === max) {
hsb.h = (g - b) / delta
} else if (g === max) {
hsb.h = 2 + (b - r) / delta
} else {
hsb.h = 4 + (r - g) / delta
}
}
hsb.h *= 60
if (hsb.h < 0) {
hsb.h += 360
}
hsb.s *= 100 / 255
hsb.b *= 100 / 255
return hsb
}
export function hex2hsb(hex) {
return rgb2hsb(hex2rgb(hex))
}
class Color extends Component {
static props = {
value: {
type: String,
default: '',
attribute: false,
observer(val) {
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if (!this.panelShow) {
this.#calc(val)
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}
}
},
disabled: false,
readonly: false
}
// 临时的value, 组件内的操作, 修改的是这个值, 避免直接修改value触发太多的计算
#value = ''
#x = 0 // 场景触点的X坐标
#y = 0 // 场景触点的Y坐标
#ht = 0 // 颜色池的触点坐标
#at = 100 // 透明度条的触点坐标
#sceneBg = '#ff0000'
#alphaBg = '#ff0000'
cache = {
hsb: { h: 0, s: 100, b: 100 },
rgba: { r: 255, g: 0, b: 0, a: 100 }
}
static styles = [
css`
:host {
display: inline-flex;
}
.color-picker {
position: relative;
width: 36px;
height: 36px;
}
.alpha-bg {
background: linear-gradient(
45deg,
var(--color-grey-1) 25%,
transparent 25%,
transparent 75%,
var(--color-grey-1) 75%,
var(--color-grey-1)
),
linear-gradient(
45deg,
var(--color-grey-1) 25%,
transparent 25%,
transparent 75%,
var(--color-grey-1) 75%,
var(--color-grey-1)
);
background-size: 12px 12px;
background-position: 0 0, 6px 6px;
}
`,
// 预览
css`
.preview {
display: flex;
width: 100%;
height: 100%;
border: 2px solid var(--color-plain-2);
border-radius: 6px;
cursor: pointer;
transition: box-shadow 0.15s linear;
span {
width: 100%;
height: 100%;
border: 3px solid #fff;
border-radius: 6px;
outline: none;
}
&:focus-within {
box-shadow: 0 0 0 2px var(--color-plain-a);
}
}
`,
// .color-panel
css`
.color-panel {
display: none;
position: absolute;
left: 0;
top: 38px;
width: 310px;
padding: 5px;
background: #fff;
box-shadow: 0 0 20px rgba(0, 0, 0, 0.15);
}
.dashboard {
display: flex;
justify-content: space-between;
.scene {
overflow: hidden;
position: relative;
width: 280px;
height: 180px;
background: #f00;
&::before,
&::after {
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
content: '';
}
&::before {
background: linear-gradient(to right, #fff, transparent);
}
&::after {
background: linear-gradient(to bottom, transparent, #000);
}
.thumb {
position: absolute;
width: 0;
height: 0;
&::after {
display: block;
width: 10px;
height: 10px;
border-radius: 50%;
background: rgba(32, 32, 32, 0.3);
box-shadow: 0 0 0 1px #fff;
transform: translate(-5px, -5px);
content: '';
}
}
}
.pool {
overflow: hidden;
position: relative;
width: 12px;
height: 180px;
background: linear-gradient(
to bottom,
#f00 0,
#ff0 17%,
#0f0 33%,
#0ff 50%,
#00f 67%,
#f0f 83%,
#f00
);
.thumb {
position: absolute;
left: 0;
top: 0;
width: 12px;
height: 0;
&::after {
display: block;
width: 12px;
height: 12px;
border-radius: 50%;
background: #fff;
box-shadow: 0 0 3px rgba(0, 0, 0, 0.5);
transform: translateY(-6px);
content: '';
}
}
.hue {
position: relative;
display: block;
width: 12px;
height: 180px;
appearance: slider-vertical;
opacity: 0;
}
}
}
.alpha-box {
overflow: hidden;
position: relative;
width: 100%;
height: 12px;
margin: 12px 0;
.bar {
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 12px;
background: linear-gradient(to right, transparent, #f00);
}
.thumb {
position: absolute;
left: 100%;
top: 0;
width: 0;
height: 12px;
&::after {
display: block;
width: 12px;
height: 12px;
border-radius: 50%;
background: #fff;
box-shadow: 0 0 3px rgba(0, 0, 0, 0.5);
transform: translateX(-6px);
content: '';
}
}
.alpha {
position: relative;
display: block;
width: 100%;
height: 12px;
opacity: 0;
}
}
`,
css`
.input-box {
display: flex;
justify-content: space-between;
align-items: center;
padding: 6px 0;
.input {
width: 200px;
height: 24px;
padding: 0 6px;
line-height: 22px;
font: inherit;
font-size: 12px;
border: 2px solid var(--color-plain-2);
border-radius: 4px;
outline: none;
color: var(--color-dark-1);
transition: box-shadow 0.15s linear;
&::placeholder {
color: var(--color-grey-1);
}
&:focus {
box-shadow: 0 0 0 2px var(--color-plain-a);
}
}
.clear,
.submit {
font-size: 12px;
cursor: pointer;
user-select: none;
}
.clear {
color: var(--color-grey-3);
}
.submit {
padding: 2px 6px;
border-radius: 2px;
color: var(--color-plain-1);
background: var(--color-teal-2);
outline: none;
transition: box-shadow 0.15s linear, background 0.15s linear;
&:hover {
background: var(--color-teal-1);
}
&:focus {
box-shadow: 0 0 0 2px var(--color-teal-a);
}
}
}
`
]
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#calc(val) {
var isHex
var rgb
val = val.toLowerCase()
if (!val) {
return
}
isHex = /^#[0-9a-f]{3,6}$/.test(val)
if (isHex) {
Object.assign(this.cache.rgba, hex2rgb(val), { a: 100 })
} else {
var res = val.match(/rgba?\((\d+),\s*?(\d+),\s*?(\d+)[,\s]*?([\d\.]+)?\)/)
if (res) {
this.cache.rgba = { r: +res[1], g: +res[2], b: +res[3], a: 100 }
if (res[4] !== undefined) {
this.cache.rgba.a = ~~(res[4] * 100)
}
} else {
return
}
}
this.cache.hsb = rgb2hsb(this.cache.rgba)
}
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toggleColorPanel() {
this.$refs.panel.style.display = 'block'
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this.panelShow = true
this.#updateView()
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}
// 透明度变化
alphaChange(ev) {
var a = ev.target.value
var { r, g, b } = this.cache.rgba
this.cache.rgba.a = a
this.#updateView()
}
// 色彩池变化
hueChange(ev) {
var h = 360 - ev.target.value
var { s, b } = this.cache.hsb
var rgba = this.cache.rgba
var hsb = { h, s, b }
Object.assign(rgba, hsb2rgb(hsb))
this.cache.hsb = hsb
this.cache.rgba = rgba
this.#updateView()
}
#updateView() {
var { hsb, rgba } = this.cache
var sceneBg, color, alphaBg
var x, y
x = Math.ceil((hsb.s * 280) / 100)
y = 180 - Math.ceil((hsb.b * 180) / 100)
sceneBg = '#' + rgb2hex(hsb2rgb({ h: hsb.h, s: 100, b: 100 }))
alphaBg = '#' + rgb2hex(rgba)
if (rgba.a < 100) {
color = `rgba(${rgba.r}, ${rgba.g}, ${rgba.b}, ${rgba.a / 100})`
} else {
color = alphaBg
}
this.#sceneBg = sceneBg
this.#alphaBg = alphaBg
this.#value = color
this.#x = x
this.#y = y
this.#ht = hsb.h / 2
this.#at = rgba.a
this.$requestUpdate()
}
#changeColor(x, y) {
let { hsb, rgba } = this.cache
hsb.s = ~~((100 * x) / 280)
hsb.b = ~~((100 * (180 - y)) / 180)
Object.assign(rgba, hsb2rgb(hsb))
this.cache.hsb = hsb
this.cache.rgba = rgba
this.#updateView()
}
closePanel() {
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if (this.hasOwnProperty('panelShow')) {
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this.$refs.panel.style.display = ''
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this.#calc(this.value)
this.#updateView()
delete this.panelShow
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}
}
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submit() {
this.$refs.panel.style.display = ''
this.value = this.#value
this.$emit('change', { data: this.#value })
delete this.panelShow
}
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mounted() {
var handleMove
// 更新一次视图
nextTick(_ => this.#updateView())
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bind(this.$refs.scene, 'mousedown', ev => {
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ev.preventDefault()
var { pageX, pageY } = ev
var { left, top } = offset(this.$refs.scene)
var x = pageX - left
var y = pageY - top
this.#changeColor(x, y)
handleMove = bind(document, 'mousemove', ev => {
ev.preventDefault()
var { pageX, pageY } = ev
var x = pageX - left
var y = pageY - top
var rgb
x = x < 0 ? 0 : x > 280 ? 280 : x
y = y < 0 ? 0 : y > 180 ? 180 : y
this.#changeColor(x, y)
})
})
this.handleUp = bind(document, 'mouseup', ev => {
ev.preventDefault()
unbind(document, 'mousemove', handleMove)
})
// 点击外部区别时,还原之前的颜色值
this._outsideFn = outsideClick(this.$refs.panel, ev => {
this.closePanel()
})
}
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unmounted() {
clearOutsideClick(this._outsideFn)
unbind(document, 'mouseup', this.handleUp)
}
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render() {
return html`
<div class="color-picker">
<section class="preview alpha-bg" @click=${this.toggleColorPanel}>
<span style="background-color:${this.#value}" tabindex="0"></span>
</section>
<div class="color-panel" ref="panel">
<section class="dashboard">
<div
class="scene"
style="background-color:${this.#sceneBg}"
ref="scene"
>
<span
class="thumb"
style="left: ${this.#x}px; top:${this.#y}px"
></span>
</div>
<div class="pool">
<span class="thumb hue-thumb" style="top:${this.#ht}px"></span>
<input
class="hue"
max="360"
min="0"
step="1"
type="range"
@input=${this.hueChange}
/>
</div>
</section>
<section class="alpha-box alpha-bg">
<div
class="bar"
style="background:linear-gradient(to right, transparent, ${this
.#alphaBg})"
></div>
<span class="thumb alpha-thumb" style="left:${this.#at}%"></span>
<input
class="alpha"
max="100"
min="0"
step="1"
type="range"
@input=${this.alphaChange}
/>
</section>
<section class="input-box">
<input class="input" :value=${this.#value} maxlength="28" />
<a class="clear" @click=${this.closePanel}>清除</a>
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<a tabindex="0" class="submit" @click=${this.submit}>确定</a>
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</section>
</div>
</div>
`
}
}
Color.reg('color')