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| The top of every page is one surface: the breadcrumb, search, spend, Ask g1t, bell and + share one height, corners and spacing, Ask g1t is a plain tinted button with the g1t mark drawn on whole pixels, a page's own header sits directly under the bar at the same left edge, and every section, conversations and open artifacts included, draws the same rounded panel. Tables written in chat render as tables, and the site's file, checkbox, radio, number and date controls are the design system's. Button, Separator, Breadcrumb, Table and FileDrop join the shared components; the chat guide says how tables work. | 1 | import { FileText, Upload, X } from "lucide-react"; |
| 2 | import { type ChangeEvent, type DragEvent, type ReactNode, useEffect, useId, useRef, useState } from "react"; | |
| 3 | ||
| 4 | import { cn } from "../../lib/cn"; | |
| 5 | ||
| 6 | // A file field as a dropzone. The real <input type="file"> is inside it, | |
| 7 | // visually hidden, so its name, accept, multiple and required work as they | |
| 8 | // always do and the form posts the files exactly as a bare input would. A | |
| 9 | // click or Enter on the zone opens the picker; files dropped on it are put | |
| 10 | // on the input and a change event is sent, as if they had been picked. | |
| 11 | ||
| 12 | type Chosen = { name: string; size: number }; | |
| 13 | ||
| 14 | /** Bytes as a person reads them: 812 B, 14.2 KB, 1.3 MB. */ | |
| 15 | function fileSize(bytes: number): string { | |
| 16 | if (bytes < 1024) return `${bytes} B`; | |
| 17 | if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)} KB`; | |
| 18 | return `${(bytes / (1024 * 1024)).toFixed(1)} MB`; | |
| 19 | } | |
| 20 | ||
| 21 | export function FileDrop({ | |
| 22 | id, | |
| 23 | name, | |
| 24 | accept, | |
| 25 | multiple = false, | |
| 26 | required, | |
| 27 | hint, | |
| 28 | label, | |
| 29 | compact = false, | |
| 30 | className, | |
| 31 | onChange, | |
| 32 | "aria-describedby": describedBy, | |
| 33 | }: { | |
| 34 | id?: string; | |
| 35 | name?: string; | |
| 36 | accept?: string; | |
| 37 | multiple?: boolean; | |
| 38 | required?: boolean; | |
| 39 | /** A line under the prompt, such as the types and the size allowed. */ | |
| 40 | hint?: ReactNode; | |
| 41 | /** The field's name for a screen reader, when nothing else labels it. */ | |
| 42 | label?: string; | |
| 43 | /** One row, for a tight spot beside other controls. */ | |
| 44 | compact?: boolean; | |
| 45 | className?: string; | |
| 46 | onChange?: (event: ChangeEvent<HTMLInputElement>) => void; | |
| 47 | "aria-describedby"?: string; | |
| 48 | }) { | |
| 49 | const generated = useId(); | |
| 50 | const inputId = id ?? generated; | |
| 51 | const hintId = `${inputId}-hint`; | |
| 52 | const input = useRef<HTMLInputElement>(null); | |
| 53 | const [files, setFiles] = useState<Chosen[]>([]); | |
| 54 | const [dragging, setDragging] = useState(false); | |
| 55 | ||
| 56 | // A form reset empties the input; the list follows it. | |
| 57 | useEffect(() => { | |
| 58 | const form = input.current?.form; | |
| 59 | if (!form) return; | |
| 60 | const onReset = () => setFiles([]); | |
| 61 | form.addEventListener("reset", onReset); | |
| 62 | return () => form.removeEventListener("reset", onReset); | |
| 63 | }, []); | |
| 64 | ||
| 65 | const changed = (event: ChangeEvent<HTMLInputElement>) => { | |
| 66 | setFiles(Array.from(event.currentTarget.files ?? [], (file) => ({ name: file.name, size: file.size }))); | |
| 67 | onChange?.(event); | |
| 68 | }; | |
| 69 | ||
| 70 | const drop = (event: DragEvent<HTMLLabelElement>) => { | |
| 71 | event.preventDefault(); | |
| 72 | setDragging(false); | |
| 73 | const field = input.current; | |
| 74 | const dropped = event.dataTransfer.files; | |
| 75 | if (!field || dropped.length === 0) return; | |
| 76 | if (multiple || dropped.length === 1) { | |
| 77 | field.files = dropped; | |
| 78 | } else { | |
| 79 | const one = new DataTransfer(); | |
| 80 | one.items.add(dropped[0]); | |
| 81 | field.files = one.files; | |
| 82 | } | |
| 83 | field.dispatchEvent(new Event("change", { bubbles: true })); | |
| 84 | }; | |
| 85 | ||
| 86 | const clear = () => { | |
| 87 | const field = input.current; | |
| 88 | if (!field) return; | |
| 89 | field.value = ""; | |
| 90 | field.dispatchEvent(new Event("change", { bubbles: true })); | |
| 91 | field.focus(); | |
| 92 | }; | |
| 93 | ||
| 94 | const describedByIds = [describedBy, hint ? hintId : null].filter(Boolean).join(" ") || undefined; | |
| 95 | const plural = multiple; | |
| 96 | ||
| 97 | return ( | |
| 98 | <div className={cn("min-w-0", className)}> | |
| 99 | <label | |
| 100 | htmlFor={inputId} | |
| 101 | onDragEnter={(event) => { | |
| 102 | event.preventDefault(); | |
| 103 | setDragging(true); | |
| 104 | }} | |
| 105 | onDragOver={(event) => { | |
| 106 | event.preventDefault(); | |
| 107 | event.dataTransfer.dropEffect = "copy"; | |
| 108 | }} | |
| 109 | onDragLeave={(event) => { | |
| 110 | if (!event.currentTarget.contains(event.relatedTarget as Node | null)) setDragging(false); | |
| 111 | }} | |
| 112 | onDrop={drop} | |
| 113 | className={cn( | |
| 114 | "relative flex cursor-pointer rounded-lg border border-dashed border-line-strong bg-bg text-sm text-muted transition-colors", | |
| 115 | "hover:border-accent/50 hover:bg-surface has-[:focus-visible]:ring-2 has-[:focus-visible]:ring-accent has-[:focus-visible]:ring-offset-1 has-[:focus-visible]:ring-offset-bg", | |
| 116 | compact ? "min-h-11 items-center gap-2 px-3 py-1.5 sm:min-h-9" : "flex-col items-center justify-center gap-1.5 px-4 py-6 text-center", | |
| 117 | dragging && "border-accent bg-accent/5 hover:border-accent hover:bg-accent/5", | |
| 118 | )} | |
| 119 | > | |
| 120 | <input | |
| 121 | ref={input} | |
| 122 | id={inputId} | |
| 123 | type="file" | |
| 124 | name={name} | |
| 125 | accept={accept} | |
| 126 | multiple={multiple} | |
| 127 | required={required} | |
| 128 | aria-describedby={describedByIds} | |
| 129 | onChange={changed} | |
| 130 | className="sr-only" | |
| 131 | /> | |
| 132 | {label && <span className="sr-only">{label}</span>} | |
| 133 | <Upload size={compact ? 14 : 18} aria-hidden className={cn("shrink-0", dragging ? "text-accent" : "text-faint")} /> | |
| 134 | <span className="min-w-0"> | |
| 135 | <span className="font-medium text-accent">{plural ? "Choose files" : "Choose a file"}</span> or drop {plural ? "them" : "it"} here | |
| 136 | </span> | |
| 137 | {hint && ( | |
| 138 | <span id={hintId} className={cn("text-xs text-faint", compact && "sr-only")}> | |
| 139 | {hint} | |
| 140 | </span> | |
| 141 | )} | |
| 142 | </label> | |
| 143 | {files.length > 0 && ( | |
| 144 | <div className="mt-2 flex items-start gap-2 rounded-lg border border-line bg-surface py-1 pr-1 pl-3"> | |
| 145 | <ul aria-label="Chosen files" className="min-w-0 grow"> | |
| 146 | {files.map((file, index) => ( | |
| 147 | <li key={`${file.name}-${index}`} className="flex min-h-8 items-center gap-2 text-sm"> | |
| 148 | <FileText size={14} aria-hidden className="shrink-0 text-faint" /> | |
| 149 | <span className="min-w-0 grow truncate">{file.name}</span> | |
| 150 | <span className="shrink-0 text-xs text-faint tabular-nums">{fileSize(file.size)}</span> | |
| 151 | </li> | |
| 152 | ))} | |
| 153 | </ul> | |
| 154 | <button | |
| 155 | type="button" | |
| 156 | onClick={clear} | |
| 157 | className="inline-flex h-8 shrink-0 items-center gap-1 rounded-md px-2 text-xs text-muted outline-none hover:bg-raised hover:text-fg focus-visible:ring-2 focus-visible:ring-accent" | |
| 158 | > | |
| 159 | <X size={13} aria-hidden /> | |
| 160 | Clear | |
| 161 | </button> | |
| 162 | </div> | |
| 163 | )} | |
| 164 | </div> | |
| 165 | ); | |
| 166 | } |
