export const CHAT_LIST_ANCHOR_OFFSET = 16; export interface ChatListAnchoredEndSpace { readonly anchorIndex: number; readonly anchorOffset: number;} export interface ChatListAnchorOptions { readonly anchorOffset?: number;} export function resolveChatListAnchoredEndSpace<Item, AnchorId>( items: ReadonlyArray<Item>, anchorId: AnchorId | null, getAnchorId: (item: Item) => AnchorId | null, options: ChatListAnchorOptions = {},): ChatListAnchoredEndSpace | undefined { if (anchorId === null) { return undefined; } for (let index = 0; index < items.length; index += 1) { const item = items[index]; if (item === undefined) { continue; } const itemAnchorId = getAnchorId(item); if (itemAnchorId === null) { continue; } return itemAnchorId === anchorId ? { anchorIndex: index, anchorOffset: options.anchorOffset ?? CHAT_LIST_ANCHOR_OFFSET, } : undefined; } return undefined;}
export const CHAT_LIST_ANCHOR_OFFSET = 16;
export interface ChatListAnchoredEndSpace {
readonly anchorIndex: number;
readonly anchorOffset: number;
}
export interface ChatListAnchorOptions {
readonly anchorOffset?: number;
}
export function resolveChatListAnchoredEndSpace<Item, AnchorId>(
items: ReadonlyArray<Item>,
anchorId: AnchorId | null,
getAnchorId: (item: Item) => AnchorId | null,
options: ChatListAnchorOptions = {},
): ChatListAnchoredEndSpace | undefined {
if (anchorId === null) {
return undefined;
}
for (let index = 0; index < items.length; index += 1) {
const item = items[index];
if (item === undefined) {
continue;
}
const itemAnchorId = getAnchorId(item);
if (itemAnchorId === null) {
continue;
}
return itemAnchorId === anchorId
? {
anchorIndex: index,
anchorOffset: options.anchorOffset ?? CHAT_LIST_ANCHOR_OFFSET,
}
: undefined;
}
return undefined;
}