recommend-colors.vue
4.32 KB
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<template>
<div
ref="reference"
tabindex="0"
@click="handleClick"
@keydown.esc="handleEscape"
@keydown.enter="handleEnter"
@keydown.left="handleArrow($event, 'x', left)"
@keydown.right="handleArrow($event, 'x', right)"
@keydown.up="handleArrow($event, 'y', up)"
@keydown.down="handleArrow($event, 'y', down)"
@blur="blurColor"
@focus="focusColor"
>
<template v-for="(item, index) in list">
<div
:key="item + ':' + index"
:class="[prefixCls + '-picker-colors-wrapper']">
<div :data-color-id="index">
<div
:style="{background: item}"
:class="[prefixCls + '-picker-colors-wrapper-color']"
></div>
<div
:ref="'color-circle-' + index"
:class="[prefixCls + '-picker-colors-wrapper-circle', hideClass]"></div>
</div>
</div>
<br v-if="lineBreak(list, index)">
</template>
</div>
</template>
<script>
import Emitter from '../../mixins/emitter';
import HandleEscapeMixin from './handleEscapeMixin';
import Prefixes from './prefixMixin';
import {clamp} from './utils';
export default {
name: 'RecommendedColors',
mixins: [Emitter, HandleEscapeMixin, Prefixes],
props: {
list: {
type: Array,
default: undefined,
},
},
data() {
const columns = 12;
const rows = Math.ceil(this.list.length / columns);
const normalStep = 1;
return {
left: -normalStep,
right: normalStep,
up: -normalStep,
down: normalStep,
powerKey: 'shiftKey',
grid: {x: 1, y: 1},
rows,
columns,
};
},
computed: {
hideClass() {
return `${this.prefixCls}-hide`;
},
linearIndex() {
return this.getLinearIndex(this.grid);
},
currentCircle() {
return this.$refs[`color-circle-${this.linearIndex}`][0];
},
},
methods: {
getLinearIndex(grid) {
return this.columns * (grid.y - 1) + grid.x - 1;
},
getMaxLimit(axis) {
return axis === 'x' ? this.columns : this.rows;
},
handleArrow(e, axis, direction) {
e.preventDefault();
e.stopPropagation();
this.blurColor();
const grid = {...this.grid};
if (e[this.powerKey]) {
if (direction < 0) {
grid[axis] = 1;
} else {
grid[axis] = this.getMaxLimit(axis);
}
} else {
grid[axis] += direction;
}
const index = this.getLinearIndex(grid);
if (index >= 0 && index < this.list.length) {
this.grid[axis] = clamp(grid[axis], 1, this.getMaxLimit(axis));
}
this.focusColor();
},
blurColor() {
this.currentCircle.classList.add(this.hideClass);
},
focusColor() {
this.currentCircle.classList.remove(this.hideClass);
},
handleEnter(e) {
this.handleClick(e, this.currentCircle);
},
handleClick(e, circle) {
e.preventDefault();
e.stopPropagation();
this.$refs.reference.focus();
const target = circle || e.target;
const colorId = target.dataset.colorId || target.parentElement.dataset.colorId;
if (colorId) {
this.blurColor();
const id = Number(colorId) + 1;
this.grid.x = id % this.columns || this.columns;
this.grid.y = Math.ceil(id / this.columns);
this.focusColor();
this.$emit('picker-color', this.list[colorId]);
this.$emit('change', {hex: this.list[colorId], source: 'hex'});
}
},
lineBreak(list, index) {
if (!index) {
return false;
}
const nextIndex = index + 1;
return nextIndex < list.length && nextIndex % this.columns === 0;
},
},
};
</script>