Gradient Editor

1"use client"
2 
3import { useEffect, useMemo, useRef, useState } from "react"
4import { Button } from "@/components/ui/button"
5import { ColorPicker } from "@/components/ui/color-picker"
6import {
7  Popover,
8  PopoverContent,
9  PopoverTrigger,
10} from "@/components/ui/popover"
11import { UnitInput } from "@/components/ui/unit-input"
12import { cn } from "@/lib/utils"
13import {
14  formatGradient,
15  fromUnitString,
16  GRADIENT_TYPES,
17  INTERPOLATION_SPACES,
18  type InternalState,
19  nextStopId,
20  POLAR_SPACES,
21  parseGradient,
22  toDeg,
23  toPct,
24} from "./gradient-editor.helpers"
25import type {
26  GradientString,
27  GradientStringMap,
28  GradientType,
29  InternalStop,
30  InterpolationHueMethod,
31  InterpolationSpace,
32  PolarSpace,
33} from "./gradient-editor.types"
34 
35// ---------------------------------------------------------------------------
36// Component (top of file)
37// ---------------------------------------------------------------------------
38 
39export interface GradientEditorProps<
40  TType extends GradientType | undefined = undefined,
41> {
42  value: GradientString | (string & {})
43  onChange: (
44    value: TType extends GradientType
45      ? GradientStringMap[TType]
46      : GradientString,
47  ) => void
48  type?: TType
49  maxStops?: number
50  className?: string
51  "aria-label"?: string
52}
53 
54export function GradientEditor<TType extends GradientType | undefined>({
55  value,
56  onChange,
57  type: typeProp,
58  maxStops = 8,
59  className,
60  "aria-label": ariaLabel = "Edit gradient",
61}: GradientEditorProps<TType>) {
62  const parsed = useMemo(() => parseGradient(value), [value])
63  if (!parsed) {
64    return (
65      <span
66        aria-hidden="true"
67        className={cn(
68          "inline-block h-5 w-12 rounded border bg-muted",
69          className,
70        )}
71        style={{ backgroundColor: value }}
72        data-slot="gradient-editor-fallback"
73      />
74    )
75  }
76  return (
77    <GradientEditorBody
78      value={value}
79      initial={parsed}
80      onChange={onChange as (next: string) => void}
81      typeProp={typeProp}
82      maxStops={maxStops}
83      className={className}
84      ariaLabel={ariaLabel}
85    />
86  )
87}
88 
89interface GradientEditorBodyProps {
90  value: string
91  initial: InternalState
92  onChange: (next: string) => void
93  typeProp: GradientType | undefined
94  maxStops: number
95  className: string | undefined
96  ariaLabel: string
97}
98 
99function GradientEditorBody({
100  value,
101  initial,
102  onChange,
103  typeProp,
104  maxStops,
105  className,
106  ariaLabel,
107}: GradientEditorBodyProps) {
108// … truncated