Add emoji reaction particles (#890)

This commit is contained in:
klopez4212
2026-06-08 07:37:47 -07:00
committed by GitHub
parent 32039b9a25
commit fdcbb696fe
8 changed files with 825 additions and 37 deletions
@@ -52,6 +52,9 @@ export function InboxMessageRow({
() => toTimelineMessage(message),
[message],
);
const [badgeBurstEmoji, setBadgeBurstEmoji] = React.useState<string | null>(
null,
);
const {
reactions,
canToggle: canToggleReactions,
@@ -92,11 +95,13 @@ export function InboxMessageRow({
onReactionSelect={
canToggleReactions ? handleReactionSelect : undefined
}
onReactionBadgeBurstRequest={
reactionPending ? undefined : setBadgeBurstEmoji
}
onReply={
canReply ? () => onSelectReplyTarget(message) : undefined
}
reactionErrorMessage={reactionErrorMessage}
reactionPending={reactionPending}
reactions={reactions}
/>
</div>
@@ -134,6 +139,12 @@ export function InboxMessageRow({
onSelect={(emoji) => {
void handleReactionSelect(emoji);
}}
burstEmojiOnRender={badgeBurstEmoji}
onBurstEmojiRendered={(emoji) => {
setBadgeBurstEmoji((current) =>
current === emoji ? null : current,
);
}}
pending={reactionPending}
reactions={reactions}
/>
@@ -39,8 +39,8 @@ import {
DropdownMenuSeparator,
DropdownMenuTrigger,
} from "@/shared/ui/dropdown-menu";
import { isPositiveEmojiParticle } from "@/shared/ui/EmojiBurstProvider";
import { Popover, PopoverContent, PopoverTrigger } from "@/shared/ui/popover";
import { Spinner } from "@/shared/ui/spinner";
import { Tooltip, TooltipContent, TooltipTrigger } from "@/shared/ui/tooltip";
function copyToClipboard(text: string, successMessage: string) {
@@ -263,12 +263,12 @@ export function MessageActionBar({
onEdit,
onFollowThread,
onMarkUnread,
onReactionBadgeBurstRequest,
onReactionSelect,
onReply,
onUnfollowThread,
reactionErrorMessage = null,
reactions,
reactionPending = false,
isFollowingThread,
}: {
/** Channel UUID — required for the "Copy link" action; when omitted the
@@ -279,12 +279,12 @@ export function MessageActionBar({
onEdit?: (message: TimelineMessage) => void;
onFollowThread?: (message: TimelineMessage) => void;
onMarkUnread?: (message: TimelineMessage) => void;
onReactionBadgeBurstRequest?: (emoji: string) => void;
onReactionSelect?: (emoji: string) => Promise<void>;
onReply?: (message: TimelineMessage) => void;
onUnfollowThread?: (message: TimelineMessage) => void;
reactionErrorMessage?: string | null;
reactions: TimelineReaction[];
reactionPending?: boolean;
isFollowingThread?: boolean;
}) {
const [isReactionPickerOpen, setIsReactionPickerOpen] = React.useState(false);
@@ -307,6 +307,10 @@ export function MessageActionBar({
const selectedReactionCount = reactions.filter(
(reaction) => reaction.reactedByCurrentUser,
).length;
const wouldAddReaction = (emoji: string) =>
!reactions.some(
(reaction) => reaction.emoji === emoji && reaction.reactedByCurrentUser,
);
return (
<div
@@ -334,7 +338,6 @@ export function MessageActionBar({
aria-label="Open reactions"
className="h-6 w-6 rounded-full p-0"
data-testid={`react-message-${message.id}`}
disabled={reactionPending}
size="sm"
type="button"
variant={
@@ -343,11 +346,7 @@ export function MessageActionBar({
: "ghost"
}
>
{reactionPending ? (
<Spinner className="h-3 w-3" />
) : (
<SmilePlus className="h-3 w-3" />
)}
<SmilePlus className="h-3 w-3" />
</Button>
</PopoverTrigger>
</TooltipTrigger>
@@ -374,6 +373,12 @@ export function MessageActionBar({
}
// `value` is already a `native` glyph or a `:shortcode:` for
// custom emoji; the toggle mutation resolves the URL.
if (
wouldAddReaction(value) &&
isPositiveEmojiParticle(value)
) {
onReactionBadgeBurstRequest?.(value);
}
void onReactionSelect(value).finally(() => {
setIsReactionPickerOpen(false);
});
@@ -6,8 +6,11 @@ import type { TimelineReaction } from "@/features/messages/types";
import { cn } from "@/shared/lib/cn";
import { emojiDisplayName } from "@/shared/lib/emojiName";
import { rewriteRelayUrl } from "@/shared/lib/mediaUrl";
import {
isPositiveEmojiParticle,
useEmojiBurst,
} from "@/shared/ui/EmojiBurstProvider";
import { Popover, PopoverContent, PopoverTrigger } from "@/shared/ui/popover";
import { Spinner } from "@/shared/ui/spinner";
import { Tooltip, TooltipContent, TooltipTrigger } from "@/shared/ui/tooltip";
const REACTION_PILL_BASE_CLASSES =
@@ -15,6 +18,38 @@ const REACTION_PILL_BASE_CLASSES =
const REACTION_GLYPH_CLASSES = "h-3.5 w-3.5 translate-y-px text-sm";
const REACTION_PILL_HOVER_CLASSES =
"hover:bg-primary/10 hover:text-foreground focus-visible:bg-primary/10 focus-visible:outline-hidden focus-visible:ring-2 focus-visible:ring-ring";
const BADGE_BURST_STABLE_FRAMES = 2;
const BADGE_BURST_MAX_FRAMES = 12;
const BADGE_BURST_RECT_EPSILON = 0.5;
type BadgeBurstRect = {
height: number;
left: number;
top: number;
width: number;
};
function toBadgeBurstRect(rect: DOMRect): BadgeBurstRect {
return {
height: rect.height,
left: rect.left,
top: rect.top,
width: rect.width,
};
}
function isSameBadgeBurstRect(
left: BadgeBurstRect | null,
right: BadgeBurstRect,
) {
return (
left !== null &&
Math.abs(left.left - right.left) <= BADGE_BURST_RECT_EPSILON &&
Math.abs(left.top - right.top) <= BADGE_BURST_RECT_EPSILON &&
Math.abs(left.width - right.width) <= BADGE_BURST_RECT_EPSILON &&
Math.abs(left.height - right.height) <= BADGE_BURST_RECT_EPSILON
);
}
/**
* Render a reaction's emoji: a custom (image) emoji when `emojiUrl` is set,
@@ -99,6 +134,8 @@ export function MessageReactions({
pending,
onSelect,
className,
burstEmojiOnRender = null,
onBurstEmojiRendered,
}: {
messageId: string;
reactions: TimelineReaction[];
@@ -106,7 +143,96 @@ export function MessageReactions({
pending: boolean;
onSelect: (emoji: string) => void;
className?: string;
burstEmojiOnRender?: string | null;
onBurstEmojiRendered?: (emoji: string) => void;
}) {
const { burstEmoji } = useEmojiBurst();
const [pendingBadgeBurstEmoji, setPendingBadgeBurstEmoji] = React.useState<
string | null
>(null);
const pillRefs = React.useRef(new Map<string, HTMLButtonElement>());
const deliveredBadgeBurstRef = React.useRef<string | null>(null);
const badgeBurstEmoji = burstEmojiOnRender ?? pendingBadgeBurstEmoji;
const registerPill = React.useCallback(
(emoji: string, element: HTMLButtonElement | null) => {
if (element) {
pillRefs.current.set(emoji, element);
} else {
pillRefs.current.delete(emoji);
}
},
[],
);
React.useEffect(() => {
if (!badgeBurstEmoji) {
deliveredBadgeBurstRef.current = null;
return;
}
if (
deliveredBadgeBurstRef.current === badgeBurstEmoji ||
!isPositiveEmojiParticle(badgeBurstEmoji)
) {
return;
}
const reaction = reactions.find(
(candidate) =>
candidate.emoji === badgeBurstEmoji && candidate.reactedByCurrentUser,
);
if (!reaction || !pillRefs.current.get(badgeBurstEmoji)) return;
let frameId: number | null = null;
let frameCount = 0;
let stableFrameCount = 0;
let previousRect: BadgeBurstRect | null = null;
const cancelFrame = () => {
if (frameId === null) return;
window.cancelAnimationFrame(frameId);
frameId = null;
};
const emitFromSettledBadge = () => {
frameId = null;
const pill = pillRefs.current.get(badgeBurstEmoji);
if (!pill || !document.documentElement.contains(pill)) return;
const nextRect = toBadgeBurstRect(pill.getBoundingClientRect());
if (!nextRect.width && !nextRect.height) return;
stableFrameCount = isSameBadgeBurstRect(previousRect, nextRect)
? stableFrameCount + 1
: 0;
previousRect = nextRect;
frameCount += 1;
if (
stableFrameCount < BADGE_BURST_STABLE_FRAMES &&
frameCount < BADGE_BURST_MAX_FRAMES
) {
frameId = window.requestAnimationFrame(emitFromSettledBadge);
return;
}
deliveredBadgeBurstRef.current = badgeBurstEmoji;
burstEmoji(badgeBurstEmoji, {
clientX: nextRect.left + nextRect.width / 2,
clientY: nextRect.top + nextRect.height / 2,
});
setPendingBadgeBurstEmoji((current) =>
current === badgeBurstEmoji ? null : current,
);
onBurstEmojiRendered?.(badgeBurstEmoji);
};
frameId = window.requestAnimationFrame(emitFromSettledBadge);
return cancelFrame;
}, [badgeBurstEmoji, burstEmoji, onBurstEmojiRendered, reactions]);
if (reactions.length === 0) {
return null;
}
@@ -125,6 +251,7 @@ export function MessageReactions({
canToggle={canToggle}
pending={pending}
reaction={reaction}
registerPill={registerPill}
onSelect={onSelect}
/>
))}
@@ -133,6 +260,8 @@ export function MessageReactions({
messageId={messageId}
onSelect={onSelect}
pending={pending}
reactions={reactions}
requestBadgeBurst={setPendingBadgeBurstEmoji}
/>
) : null}
</div>
@@ -143,12 +272,20 @@ function InlineReactionPicker({
messageId,
onSelect,
pending,
reactions,
requestBadgeBurst,
}: {
messageId: string;
onSelect: (emoji: string) => void;
pending: boolean;
reactions: TimelineReaction[];
requestBadgeBurst: (emoji: string) => void;
}) {
const [open, setOpen] = React.useState(false);
const wouldAddReaction = (emoji: string) =>
!reactions.some(
(reaction) => reaction.emoji === emoji && reaction.reactedByCurrentUser,
);
return (
<Popover onOpenChange={setOpen} open={open}>
@@ -173,11 +310,7 @@ function InlineReactionPicker({
disabled={pending}
type="button"
>
{pending ? (
<Spinner className="h-4 w-4" />
) : (
<SmilePlus className="h-4 w-4" />
)}
<SmilePlus className="h-4 w-4" />
</button>
</PopoverTrigger>
</TooltipTrigger>
@@ -192,6 +325,9 @@ function InlineReactionPicker({
<EmojiPicker
autoFocus
onSelect={(value) => {
if (wouldAddReaction(value) && isPositiveEmojiParticle(value)) {
requestBadgeBurst(value);
}
onSelect(value);
setOpen(false);
}}
@@ -205,13 +341,16 @@ function ReactionPill({
reaction,
canToggle,
pending,
registerPill,
onSelect,
}: {
reaction: TimelineReaction;
canToggle: boolean;
pending: boolean;
registerPill: (emoji: string, element: HTMLButtonElement | null) => void;
onSelect: (emoji: string) => void;
}) {
const { burstEmoji } = useEmojiBurst();
const [open, setOpen] = React.useState(false);
const openTimeout = React.useRef<ReturnType<typeof setTimeout> | null>(null);
const closeTimeout = React.useRef<ReturnType<typeof setTimeout> | null>(null);
@@ -248,6 +387,13 @@ function ReactionPill({
return clearTimers;
}, [clearTimers]);
const setPillRef = React.useCallback(
(element: HTMLButtonElement | null) => {
registerPill(reaction.emoji, element);
},
[reaction.emoji, registerPill],
);
const pillClasses = cn(
REACTION_PILL_BASE_CLASSES,
"min-w-12 justify-center gap-1.5 px-2",
@@ -261,8 +407,14 @@ function ReactionPill({
: "cursor-default",
);
const handleClick = () => {
const handleClick = (event: React.MouseEvent<HTMLButtonElement>) => {
if (!canToggle) return;
if (
!reaction.reactedByCurrentUser &&
isPositiveEmojiParticle(reaction.emoji)
) {
burstEmoji(reaction.emoji, event);
}
onSelect(reaction.emoji);
};
@@ -277,6 +429,7 @@ function ReactionPill({
className={pillClasses}
disabled={!canToggle || pending}
onClick={handleClick}
ref={setPillRef}
type="button"
>
<EmojiGlyph reaction={reaction} className={REACTION_GLYPH_CLASSES} />
@@ -303,6 +456,7 @@ function ReactionPill({
className={pillClasses}
disabled={!canToggle || pending}
onClick={handleClick}
ref={setPillRef}
type="button"
>
<EmojiGlyph
@@ -67,6 +67,9 @@ export const MessageRow = React.memo(
const [expandedDiffId, setExpandedDiffId] = React.useState<string | null>(
null,
);
const [badgeBurstEmoji, setBadgeBurstEmoji] = React.useState<string | null>(
null,
);
const {
reactions,
canToggle: canToggleReactions,
@@ -219,13 +222,15 @@ export const MessageRow = React.memo(
onEdit={onEdit}
onFollowThread={onFollowThread}
onMarkUnread={onMarkUnread}
onReactionBadgeBurstRequest={
reactionPending ? undefined : setBadgeBurstEmoji
}
onReactionSelect={
canToggleReactions ? handleReactionSelect : undefined
}
onReply={onReply}
onUnfollowThread={onUnfollowThread}
reactionErrorMessage={reactionErrorMessage}
reactionPending={reactionPending}
reactions={reactions}
/>
</div>
@@ -258,6 +263,12 @@ export const MessageRow = React.memo(
reactions={reactions}
canToggle={canToggleReactions}
pending={reactionPending}
burstEmojiOnRender={badgeBurstEmoji}
onBurstEmojiRendered={(emoji) => {
setBadgeBurstEmoji((current) =>
current === emoji ? null : current,
);
}}
onSelect={(emoji) => {
void handleReactionSelect(emoji);
}}
@@ -10,12 +10,12 @@ import { resolveUserLabel } from "@/features/profile/lib/identity";
import { UserProfilePopover } from "@/features/profile/ui/UserProfilePopover";
import { cn } from "@/shared/lib/cn";
import { Button } from "@/shared/ui/button";
import { isPositiveEmojiParticle } from "@/shared/ui/EmojiBurstProvider";
import {
MENTION_CHIP_BASE_CLASSES,
MENTION_CHIP_HOVER_CLASSES,
} from "@/shared/ui/mentionChip";
import { Popover, PopoverContent, PopoverTrigger } from "@/shared/ui/popover";
import { Spinner } from "@/shared/ui/spinner";
import { Tooltip, TooltipContent, TooltipTrigger } from "@/shared/ui/tooltip";
import { UserAvatar } from "@/shared/ui/UserAvatar";
import { MessageTimestamp } from "./MessageTimestamp";
@@ -287,6 +287,9 @@ export const SystemMessageRow = React.memo(function SystemMessageRow({
remove: boolean,
) => Promise<void>;
}) {
const [badgeBurstEmoji, setBadgeBurstEmoji] = React.useState<string | null>(
null,
);
const [isReactionPickerOpen, setIsReactionPickerOpen] = React.useState(false);
const {
reactions,
@@ -313,6 +316,11 @@ export const SystemMessageRow = React.memo(function SystemMessageRow({
return null;
}
const wouldAddReaction = (emoji: string) =>
!reactions.some(
(reaction) => reaction.emoji === emoji && reaction.reactedByCurrentUser,
);
return (
<div
className="group/message relative rounded-2xl px-3 py-2 transition-colors hover:bg-muted/50 focus-within:bg-muted/50"
@@ -345,6 +353,12 @@ export const SystemMessageRow = React.memo(function SystemMessageRow({
canToggle={canToggleReactions}
pending={reactionPending}
className="mt-0.5 pt-0.5"
burstEmojiOnRender={badgeBurstEmoji}
onBurstEmojiRendered={(emoji) => {
setBadgeBurstEmoji((current) =>
current === emoji ? null : current,
);
}}
onSelect={(emoji) => {
void handleReactionSelect(emoji);
}}
@@ -380,16 +394,11 @@ export const SystemMessageRow = React.memo(function SystemMessageRow({
<Button
aria-label="Open reactions"
className="h-6 w-6 rounded-full p-0"
disabled={reactionPending}
size="sm"
type="button"
variant={isReactionPickerOpen ? "secondary" : "ghost"}
>
{reactionPending ? (
<Spinner className="h-3 w-3" />
) : (
<SmilePlus className="h-3 w-3" />
)}
<SmilePlus className="h-3 w-3" />
</Button>
</PopoverTrigger>
</TooltipTrigger>
@@ -410,6 +419,13 @@ export const SystemMessageRow = React.memo(function SystemMessageRow({
) : null}
<EmojiPicker
onSelect={(value) => {
if (
!reactionPending &&
wouldAddReaction(value) &&
isPositiveEmojiParticle(value)
) {
setBadgeBurstEmoji(value);
}
void handleReactionSelect(value).finally(() => {
setIsReactionPickerOpen(false);
});
@@ -1,9 +1,13 @@
import * as React from "react";
import { useQueryClient } from "@tanstack/react-query";
import { customEmojiQueryKey } from "@/features/custom-emoji/hooks";
import type {
TimelineMessage,
TimelineReaction,
} from "@/features/messages/types";
import { reactionEmojiUrl } from "@/shared/api/customEmoji";
import type { CustomEmoji } from "@/shared/lib/remarkCustomEmoji";
type ReactionHandler = {
/** Reactions sorted by count (desc) then emoji (asc). */
@@ -18,6 +22,69 @@ type ReactionHandler = {
select: (emoji: string) => Promise<void>;
};
function sortReactions(reactions: TimelineReaction[]): TimelineReaction[] {
return [...reactions].sort((left, right) => {
if (left.count !== right.count) {
return right.count - left.count;
}
return left.emoji.localeCompare(right.emoji);
});
}
function applyOptimisticReaction(
reactions: TimelineReaction[],
emoji: string,
remove: boolean,
emojiUrl?: string,
): TimelineReaction[] {
const existing = reactions.find((reaction) => reaction.emoji === emoji);
if (remove) {
if (!existing?.reactedByCurrentUser) return reactions;
const nextCount = Math.max(0, existing.count - 1);
if (nextCount === 0) {
return reactions.filter((reaction) => reaction.emoji !== emoji);
}
return reactions.map((reaction) =>
reaction.emoji === emoji
? {
...reaction,
count: nextCount,
reactedByCurrentUser: false,
users: reaction.users.filter((user) => user.displayName !== "You"),
}
: reaction,
);
}
if (existing) {
if (existing.reactedByCurrentUser) return reactions;
return reactions.map((reaction) =>
reaction.emoji === emoji
? {
...reaction,
count: reaction.count + 1,
reactedByCurrentUser: true,
}
: reaction,
);
}
return [
...reactions,
{
emoji,
emojiUrl,
count: 1,
reactedByCurrentUser: true,
users: [{ pubkey: "", displayName: "You", avatarUrl: null }],
},
];
}
/**
* Shared reaction state + toggle logic used by both MessageRow and
* SystemMessageRow. Keeps the pending/error/sorting concerns in one place.
@@ -30,17 +97,22 @@ export function useReactionHandler(
remove: boolean,
) => Promise<void>,
): ReactionHandler {
const queryClient = useQueryClient();
const [pending, setPending] = React.useState(false);
const [errorMessage, setErrorMessage] = React.useState<string | null>(null);
const sourceReactions = message.reactions;
const [optimisticState, setOptimisticState] = React.useState<{
reactions: TimelineReaction[];
sourceReactions: TimelineReaction[] | undefined;
} | null>(null);
const optimisticReactions =
optimisticState && optimisticState.sourceReactions === sourceReactions
? optimisticState.reactions
: null;
const reactions = React.useMemo(() => {
return [...(message.reactions ?? [])].sort((left, right) => {
if (left.count !== right.count) {
return right.count - left.count;
}
return left.emoji.localeCompare(right.emoji);
});
}, [message.reactions]);
return sortReactions(optimisticReactions ?? sourceReactions ?? []);
}, [sourceReactions, optimisticReactions]);
const canToggle = Boolean(onToggleReaction && !message.pending);
@@ -56,9 +128,30 @@ export function useReactionHandler(
setErrorMessage(null);
setPending(true);
const emojiUrl = reactionEmojiUrl(
emoji,
queryClient.getQueryData<CustomEmoji[]>(customEmojiQueryKey),
);
setOptimisticState((current) => {
const baseReactions =
current && current.sourceReactions === sourceReactions
? current.reactions
: reactions;
return {
reactions: applyOptimisticReaction(
baseReactions,
emoji,
remove,
emojiUrl,
),
sourceReactions,
};
});
try {
await onToggleReaction(message, emoji, remove);
} catch (error) {
setOptimisticState(null);
const nextMessage =
error instanceof Error
? error.message
@@ -69,7 +162,14 @@ export function useReactionHandler(
setPending(false);
}
},
[message, onToggleReaction, pending, reactions],
[
message,
onToggleReaction,
pending,
queryClient,
reactions,
sourceReactions,
],
);
return { reactions, canToggle, pending, errorMessage, select };
+7 -4
View File
@@ -5,6 +5,7 @@ import "@/shared/styles/globals.css";
import { UpdaterProvider } from "@/features/settings/hooks/UpdaterProvider";
import { WorkspacesProvider } from "@/features/workspaces/useWorkspaces";
import { ThemeProvider } from "@/shared/theme/ThemeProvider";
import { EmojiBurstProvider } from "@/shared/ui/EmojiBurstProvider";
import { Toaster } from "@/shared/ui/sonner";
import { TooltipProvider } from "@/shared/ui/tooltip";
@@ -18,10 +19,12 @@ function renderApp() {
<WorkspacesProvider>
<ThemeProvider defaultTheme="houston">
<TooltipProvider delayDuration={300}>
<UpdaterProvider>
<App />
</UpdaterProvider>
<Toaster />
<EmojiBurstProvider>
<UpdaterProvider>
<App />
</UpdaterProvider>
<Toaster />
</EmojiBurstProvider>
</TooltipProvider>
</ThemeProvider>
</WorkspacesProvider>
@@ -0,0 +1,488 @@
import * as React from "react";
type BurstPoint = {
x: number;
y: number;
};
type EmojiBurstOrigin =
| Element
| {
clientX?: number;
clientY?: number;
currentTarget?: EventTarget | null;
target?: EventTarget | null;
}
| null
| undefined;
type EmojiBurstContextValue = {
burstEmoji: (emoji: string, origin?: EmojiBurstOrigin) => void;
celebrateWithEmojiFloatBurst: () => void;
};
type Particle = {
x: number;
y: number;
xv: number;
yv: number;
rotation: number;
spin: number;
scale: number;
opacity: number;
life: number;
maxLife: number;
emoji: string;
fontSize: number;
radius: number;
gravity: number;
};
const NOOP_CONTEXT: EmojiBurstContextValue = {
burstEmoji: () => {},
celebrateWithEmojiFloatBurst: () => {},
};
const EmojiBurstContext = React.createContext<EmojiBurstContextValue | null>(
null,
);
const MAX_ACTIVE = 760;
const MAX_DPR = 2;
const EMOJI_CACHE_PX = 64;
const PICKER_PARTICLES_PER_BURST = 5;
const PICKER_PARTICLE_LIFE_FRAMES = 108;
const CELEBRATION_PARTICLE_COUNT = 102;
const HEART_PARTICLE_EMOJIS = [
"❤️",
"🩷",
"🧡",
"💛",
"💚",
"🩵",
"💙",
"💜",
"🤎",
"🖤",
"🩶",
"🤍",
"❤️‍🔥",
"❤️‍🩹",
"💖",
"💕",
"💗",
"💓",
"💞",
"💘",
"💝",
"❣️",
"♥️",
];
const POSITIVE_REACTION_PARTICLE_EMOJIS = [
"👍",
"👏",
"🙌",
"🙏",
"💯",
"🔥",
"✨",
"⭐",
"🌟",
"🎉",
"🎊",
"🥳",
"🚀",
"💪",
];
const POSITIVE_FACE_PARTICLE_EMOJIS = [
"😀",
"😃",
"😄",
"😁",
"😊",
"😇",
"🙂",
"😍",
"🤩",
"🥰",
"😘",
"😋",
"😎",
"😂",
"🤣",
];
export const POSITIVE_EMOJI_PARTICLES = [
...HEART_PARTICLE_EMOJIS,
...POSITIVE_REACTION_PARTICLE_EMOJIS,
...POSITIVE_FACE_PARTICLE_EMOJIS,
];
const CELEBRATION_EMOJIS = POSITIVE_EMOJI_PARTICLES;
const POSITIVE_EMOJI_PARTICLE_SET = new Set(POSITIVE_EMOJI_PARTICLES);
const emojiCanvasCache = new Map<string, HTMLCanvasElement>();
function isElement(value: unknown): value is Element {
return typeof Element !== "undefined" && value instanceof Element;
}
function elementCenter(element: Element): BurstPoint | null {
const rect = element.getBoundingClientRect();
if (!rect.width && !rect.height) return null;
return {
x: rect.left + rect.width / 2,
y: rect.top + rect.height / 2,
};
}
function pointFromOrigin(origin: EmojiBurstOrigin): BurstPoint | null {
if (!origin) return null;
if (isElement(origin)) return elementCenter(origin);
if (
typeof origin.clientX === "number" &&
Number.isFinite(origin.clientX) &&
typeof origin.clientY === "number" &&
Number.isFinite(origin.clientY) &&
(origin.clientX !== 0 || origin.clientY !== 0)
) {
return { x: origin.clientX, y: origin.clientY };
}
const target = origin.currentTarget ?? origin.target;
return isElement(target) ? elementCenter(target) : null;
}
function resizeCanvas(canvas: HTMLCanvasElement) {
const dpr = Math.min(window.devicePixelRatio || 1, MAX_DPR);
const width = window.innerWidth;
const height = window.innerHeight;
const targetWidth = Math.round(width * dpr);
const targetHeight = Math.round(height * dpr);
if (canvas.width === targetWidth && canvas.height === targetHeight) {
return;
}
canvas.width = targetWidth;
canvas.height = targetHeight;
canvas.style.width = `${width}px`;
canvas.style.height = `${height}px`;
}
function getEmojiCanvas(emoji: string): HTMLCanvasElement {
const dpr = Math.min(window.devicePixelRatio || 1, MAX_DPR);
const cacheKey = `${emoji}:${dpr}`;
const existing = emojiCanvasCache.get(cacheKey);
if (existing) return existing;
const fontSize = Math.ceil(EMOJI_CACHE_PX * dpr);
const size = Math.ceil(fontSize * 1.5);
const canvas = document.createElement("canvas");
canvas.width = size;
canvas.height = size;
const context = canvas.getContext("2d");
if (!context) return canvas;
context.textAlign = "center";
context.textBaseline = "middle";
context.font = `${fontSize}px "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif`;
context.fillText(emoji, size / 2, size / 2);
emojiCanvasCache.set(cacheKey, canvas);
return canvas;
}
function updateParticle(particle: Particle): boolean {
particle.life -= 1;
particle.rotation += particle.spin;
particle.yv += particle.gravity;
particle.xv *= 0.965;
particle.yv *= 0.998;
particle.x += particle.xv;
particle.y += particle.yv;
particle.scale += (1 - particle.scale) * 0.28;
particle.radius = particle.fontSize * particle.scale * 0.42;
const lifeRatio = particle.life / particle.maxLife;
if (lifeRatio < 0.24) {
particle.opacity = Math.max(0, lifeRatio / 0.24);
}
return particle.life > 0 && particle.opacity > 0.02;
}
function resolveCollisions(particles: Particle[]) {
for (let i = 0; i < particles.length; i += 1) {
for (let j = i + 1; j < particles.length; j += 1) {
const a = particles[i];
const b = particles[j];
const dx = b.x - a.x;
const dy = b.y - a.y;
const distanceSquared = dx * dx + dy * dy;
const minDistance = a.radius + b.radius;
if (
distanceSquared >= minDistance * minDistance ||
distanceSquared < 0.01
) {
continue;
}
const distance = Math.sqrt(distanceSquared);
const nx = dx / distance;
const ny = dy / distance;
const separation = (minDistance - distance) * 0.5;
a.x -= nx * separation;
a.y -= ny * separation;
b.x += nx * separation;
b.y += ny * separation;
const dvx = a.xv - b.xv;
const dvy = a.yv - b.yv;
const velocityAlongNormal = dvx * nx + dvy * ny;
if (velocityAlongNormal <= 0) continue;
const impulse = velocityAlongNormal * 0.34;
a.xv -= impulse * nx;
a.yv -= impulse * ny;
b.xv += impulse * nx;
b.yv += impulse * ny;
}
}
}
function viewportCenter(): BurstPoint {
return {
x: window.innerWidth / 2,
y: window.innerHeight / 2,
};
}
function spawnPickerEmojiBurst(
particles: Particle[],
point: BurstPoint,
emoji: string,
) {
if (particles.length + PICKER_PARTICLES_PER_BURST > MAX_ACTIVE) return;
for (let i = 0; i < PICKER_PARTICLES_PER_BURST; i += 1) {
const horizontalDrift = (Math.random() - 0.5) * 4.4;
const initialLift = 2.1 + Math.random() * 2.35;
particles.push({
x: point.x,
y: point.y,
xv: horizontalDrift,
yv: -initialLift,
rotation: (Math.random() - 0.5) * 22,
spin: (Math.random() - 0.5) * 5.2,
scale: 0.25,
opacity: 1,
life: PICKER_PARTICLE_LIFE_FRAMES,
maxLife: PICKER_PARTICLE_LIFE_FRAMES,
emoji,
fontSize: 18 + Math.ceil(Math.random() * 24),
radius: 0,
gravity: -(0.018 + Math.random() * 0.018),
});
}
}
function spawnEmojiFloatBurst(particles: Particle[]) {
const availableSlots = Math.max(0, MAX_ACTIVE - particles.length);
const count = Math.min(CELEBRATION_PARTICLE_COUNT, availableSlots);
if (count === 0) return;
const centerX = window.innerWidth / 2;
const launchBandWidth = window.innerWidth * 0.78;
for (let i = 0; i < count; i += 1) {
const x = centerX + (Math.random() - 0.5) * launchBandWidth;
const y = window.innerHeight + 52 + Math.random() * 88;
const life = 142 + Math.floor(Math.random() * 72);
const fanDirection = (x - centerX) / Math.max(window.innerWidth / 2, 1);
const emoji =
CELEBRATION_EMOJIS[Math.floor(Math.random() * CELEBRATION_EMOJIS.length)];
particles.push({
x,
y,
xv:
fanDirection * (4.2 + Math.random() * 3.4) +
(Math.random() - 0.5) * 2.2,
yv: -(5.4 + Math.random() * 4.8),
rotation: (Math.random() - 0.5) * 70,
spin: (Math.random() - 0.5) * 7.6,
scale: 0.44 + Math.random() * 0.48,
opacity: 1,
life,
maxLife: life,
emoji,
fontSize: 22 + Math.ceil(Math.random() * 30),
radius: 0,
gravity: 0,
});
}
}
export function EmojiBurstProvider({
children,
}: {
children: React.ReactNode;
}) {
const canvasRef = React.useRef<HTMLCanvasElement>(null);
const contextRef = React.useRef<CanvasRenderingContext2D | null>(null);
const particlesRef = React.useRef<Particle[]>([]);
const animationFrameRef = React.useRef<number | null>(null);
const reducedMotionRef = React.useRef(false);
const startLoop = React.useCallback(() => {
if (animationFrameRef.current !== null) return;
const canvas = canvasRef.current;
const context = contextRef.current;
if (!canvas || !context) return;
const activeCanvas = canvas;
const activeContext = context;
function frame() {
const particles = particlesRef.current;
const dpr = Math.min(window.devicePixelRatio || 1, MAX_DPR);
for (let i = particles.length - 1; i >= 0; i -= 1) {
if (!updateParticle(particles[i])) {
particles[i] = particles[particles.length - 1];
particles.pop();
}
}
activeContext.setTransform(1, 0, 0, 1, 0, 0);
activeContext.clearRect(0, 0, activeCanvas.width, activeCanvas.height);
if (particles.length === 0) {
activeContext.globalAlpha = 1;
animationFrameRef.current = null;
return;
}
resolveCollisions(particles);
for (const particle of particles) {
activeContext.globalAlpha = particle.opacity;
const emojiCanvas = getEmojiCanvas(particle.emoji);
const drawSize = particle.fontSize * particle.scale * 1.5;
const halfSize = drawSize / 2;
const radians = (particle.rotation * Math.PI) / 180;
const cos = Math.cos(radians) * dpr;
const sin = Math.sin(radians) * dpr;
activeContext.setTransform(
cos,
sin,
-sin,
cos,
particle.x * dpr,
particle.y * dpr,
);
activeContext.drawImage(
emojiCanvas,
-halfSize,
-halfSize,
drawSize,
drawSize,
);
}
activeContext.globalAlpha = 1;
animationFrameRef.current = requestAnimationFrame(frame);
}
animationFrameRef.current = requestAnimationFrame(frame);
}, []);
React.useEffect(() => {
const canvas = canvasRef.current;
if (!canvas) return;
contextRef.current = canvas.getContext("2d");
resizeCanvas(canvas);
const handleResize = () => resizeCanvas(canvas);
window.addEventListener("resize", handleResize);
return () => {
window.removeEventListener("resize", handleResize);
if (animationFrameRef.current !== null) {
cancelAnimationFrame(animationFrameRef.current);
animationFrameRef.current = null;
}
};
}, []);
React.useEffect(() => {
const mediaQuery = window.matchMedia("(prefers-reduced-motion: reduce)");
const syncReducedMotion = () => {
reducedMotionRef.current = mediaQuery.matches;
};
syncReducedMotion();
mediaQuery.addEventListener("change", syncReducedMotion);
return () => {
mediaQuery.removeEventListener("change", syncReducedMotion);
};
}, []);
const burstEmoji = React.useCallback(
(emoji: string, origin?: EmojiBurstOrigin) => {
const trimmedEmoji = emoji.trim();
if (!trimmedEmoji || reducedMotionRef.current) return;
spawnPickerEmojiBurst(
particlesRef.current,
pointFromOrigin(origin) ?? viewportCenter(),
trimmedEmoji,
);
startLoop();
},
[startLoop],
);
const celebrateWithEmojiFloatBurst = React.useCallback(() => {
if (reducedMotionRef.current) return;
spawnEmojiFloatBurst(particlesRef.current);
startLoop();
}, [startLoop]);
const value = React.useMemo<EmojiBurstContextValue>(
() => ({ burstEmoji, celebrateWithEmojiFloatBurst }),
[burstEmoji, celebrateWithEmojiFloatBurst],
);
return (
<EmojiBurstContext.Provider value={value}>
{children}
<div
aria-hidden="true"
className="pointer-events-none fixed inset-0 select-none"
style={{ contain: "strict", zIndex: 2147483000 }}
>
<canvas className="block" ref={canvasRef} />
</div>
</EmojiBurstContext.Provider>
);
}
export function useEmojiBurst(): EmojiBurstContextValue {
return React.useContext(EmojiBurstContext) ?? NOOP_CONTEXT;
}
export function isPositiveEmojiParticle(emoji: string): boolean {
return POSITIVE_EMOJI_PARTICLE_SET.has(emoji);
}