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feat(desktop): sender-derived background tints on message rows #6925

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feat(desktop): sender-derived background tints on message rows #6925

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11 changes: 11 additions & 0 deletions desktop/src/features/messages/lib/formatTimelineMessages.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,16 @@ import { truncatePubkey } from "@/shared/lib/pubkey";

const HEX_RE = /^[0-9a-f]+$/i;

function pubkeyToAccentColor(pubkey: string): string {
let hash = 0;
for (let i = 0; i < pubkey.length; i++) {
hash = (hash << 5) - hash + pubkey.charCodeAt(i);
hash |= 0;
}
const hue = Math.abs(hash) % 360;
return `hsla(${hue}, 65%, 55%, 0.10)`;
}

export function isTimelineContentEvent(event: RelayEvent) {
return (
event.kind === KIND_STREAM_MESSAGE ||
Expand Down Expand Up @@ -508,6 +518,7 @@ export function formatTimelineMessages(
rootId: thread.rootId,
depth: getDepth(event),
accent: currentPubkey === authorPubkey,
accentColor: authorPubkey ? pubkeyToAccentColor(authorPubkey) : undefined,
pending: event.pending,
edited: edit !== undefined,
kind: event.kind,
Expand Down
2 changes: 2 additions & 0 deletions desktop/src/features/messages/types.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,8 @@ export type TimelineMessage = {
rootId?: string | null;
depth: number;
accent?: boolean;
/** Deterministic background tint derived from the sender's pubkey. */
accentColor?: string;
pending?: boolean;
edited?: boolean;
highlighted?: boolean;
Expand Down
8 changes: 8 additions & 0 deletions desktop/src/features/messages/ui/MessageRow.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -904,6 +904,13 @@ export const MessageRow = React.memo(
data-testid="message-row"
onAnimationEnd={handleEntranceAnimationEnd}
>
{message.accentColor ? (
<div
aria-hidden
className="pointer-events-none absolute inset-0 -z-10 rounded-2xl"
style={{ backgroundColor: message.accentColor }}
/>
) : null}
{isThreadReplyLayout ? (
<>
{avatarGutterNode}
Expand Down Expand Up @@ -942,6 +949,7 @@ export const MessageRow = React.memo(
prev.message.ownerLabel === next.message.ownerLabel &&
prev.message.avatarUrl === next.message.avatarUrl &&
prev.message.accent === next.message.accent &&
prev.message.accentColor === next.message.accentColor &&
// The header timestamp and hover gutter both derive from createdAt (the
// old `time` prop was the same value pre-formatted; this row reads neither).
prev.message.createdAt === next.message.createdAt &&
Expand Down
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