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import { Show, createEffect, createMemo, createSignal, on, onCleanup, onMount } from "solid-js"
import { TextShimmer } from "./text-shimmer"
function common(active: string, done: string) {
const a = Array.from(active)
const b = Array.from(done)
let i = 0
while (i < a.length && i < b.length && a[i] === b[i]) i++
return {
prefix: a.slice(0, i).join(""),
active: a.slice(i).join(""),
done: b.slice(i).join(""),
}
}
function contentWidth(el: HTMLSpanElement | undefined) {
if (!el) return 0
const range = document.createRange()
range.selectNodeContents(el)
return Math.ceil(range.getBoundingClientRect().width)
}
export function ToolStatusTitle(props: {
active: boolean
activeText: string
doneText: string
class?: string
split?: boolean
}) {
const split = createMemo(() => common(props.activeText, props.doneText))
const suffix = createMemo(
() => (props.split ?? true) && split().prefix.length >= 2 && split().active.length > 0 && split().done.length > 0,
)
const prefixLen = createMemo(() => Array.from(split().prefix).length)
const activeTail = createMemo(() => (suffix() ? split().active : props.activeText))
const doneTail = createMemo(() => (suffix() ? split().done : props.doneText))
const [width, setWidth] = createSignal("auto")
const [ready, setReady] = createSignal(false)
let activeRef: HTMLSpanElement | undefined
let doneRef: HTMLSpanElement | undefined
let frame: number | undefined
let readyFrame: number | undefined
const measure = () => {
const target = props.active ? activeRef : doneRef
const px = contentWidth(target)
if (px > 0) setWidth(`${px}px`)
}
const schedule = () => {
if (typeof requestAnimationFrame !== "function") {
measure()
return
}
if (frame !== undefined) cancelAnimationFrame(frame)
frame = requestAnimationFrame(() => {
frame = undefined
measure()
})
}
const finish = () => {
if (typeof requestAnimationFrame !== "function") {
setReady(true)
return
}
if (readyFrame !== undefined) cancelAnimationFrame(readyFrame)
readyFrame = requestAnimationFrame(() => {
readyFrame = undefined
setReady(true)
})
}
createEffect(on([() => props.active, activeTail, doneTail, suffix], () => schedule()))
onMount(() => {
measure()
const fonts = typeof document !== "undefined" ? document.fonts : undefined
if (!fonts) {
finish()
return
}
fonts.ready.finally(() => {
measure()
finish()
})
})
onCleanup(() => {
if (frame !== undefined) cancelAnimationFrame(frame)
if (readyFrame !== undefined) cancelAnimationFrame(readyFrame)
})
return (
<span
data-component="tool-status-title"
data-active={props.active ? "true" : "false"}
data-ready={ready() ? "true" : "false"}
data-mode={suffix() ? "suffix" : "swap"}
class={props.class}
aria-label={props.active ? props.activeText : props.doneText}
>
<Show
when={suffix()}
fallback={
<span data-slot="tool-status-swap" style={{ width: width() }}>
<span data-slot="tool-status-active" ref={activeRef}>
<TextShimmer text={activeTail()} active={props.active} offset={0} />
</span>
<span data-slot="tool-status-done" ref={doneRef}>
<TextShimmer text={doneTail()} active={false} offset={0} />
</span>
</span>
}
>
<span data-slot="tool-status-suffix">
<span data-slot="tool-status-prefix">
<TextShimmer text={split().prefix} active={props.active} offset={0} />
</span>
<span data-slot="tool-status-tail" style={{ width: width() }}>
<span data-slot="tool-status-active" ref={activeRef}>
<TextShimmer text={activeTail()} active={props.active} offset={prefixLen()} />
</span>
<span data-slot="tool-status-done" ref={doneRef}>
<TextShimmer text={doneTail()} active={false} offset={prefixLen()} />
</span>
</span>
</span>
</Show>
</span>
)
}
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