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vue-flow/packages/core/src/components/Edges/EdgeText.vue
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Vue

<script lang="ts" setup>
import { computed, onMounted, ref, watch } from 'vue'
import type { EdgeTextProps } from '../../types/components'
import type { Rect as RectType } from '../../types'
import { isString } from '../../utils'
const {
x,
y,
label,
labelStyle = {},
labelShowBg = true,
labelBgStyle = {},
labelBgPadding = [2, 4],
labelBgBorderRadius = 2,
} = defineProps<EdgeTextProps>()
const box = ref<RectType>({ x: 0, y: 0, width: 0, height: 0 })
const el = ref<SVGTextElement | null>(null)
const transform = computed(() => `translate(${x - box.value.width / 2} ${y - box.value.height / 2})`)
onMounted(getBox)
watch([() => x, () => y, el, () => label], getBox)
function getBox() {
if (!el.value) {
return
}
const nextBox = el.value.getBBox()
if (nextBox.width !== box.value.width || nextBox.height !== box.value.height) {
box.value = nextBox
}
}
</script>
<script lang="ts">
export default {
name: 'EdgeText',
compatConfig: { MODE: 3 },
}
</script>
<template>
<g :transform="transform" class="vue-flow__edge-textwrapper">
<rect
v-if="labelShowBg"
class="vue-flow__edge-textbg"
:width="`${box.width + 2 * labelBgPadding[0]}px`"
:height="`${box.height + 2 * labelBgPadding[1]}px`"
:x="-labelBgPadding[0]"
:y="-labelBgPadding[1]"
:style="labelBgStyle"
:rx="labelBgBorderRadius"
:ry="labelBgBorderRadius"
/>
<text v-bind="$attrs" ref="el" class="vue-flow__edge-text" :y="box.height / 2" dy="0.3em" :style="labelStyle">
<slot>
<component :is="label as any" v-if="!isString(label)" />
<template v-else>
{{ label }}
</template>
</slot>
</text>
</g>
</template>