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feat: on-demand section creation & 0.3.0.

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This commit is contained in:
Shibo Lyu 2024-12-29 04:09:35 +08:00
parent dbfeb13c47
commit 5077995eb3
3 changed files with 87 additions and 28 deletions
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47
logic/board.ts
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@ -9,15 +9,7 @@ import { applyChange, createSection } from "./section.ts";
import type { BoardChange } from "../types/change.ts";
export function createBoard(config: BoardConfig): BoardData {
const sections: SectionData[][] = Array(config.ySections)
.fill(0)
.map((_, sy) =>
Array(config.xSections)
.fill(0)
.map((_, sx) => createSection({ sx, sy }, config))
);
return { config, sections };
return { config, sections: [] };
}
export function locateSection(
@ -30,9 +22,38 @@ export function locateSection(
};
}
/**
* Get a section from board.
*
* If the section does not exist yet, it will be created and (optionally) added to `board`.
*/
export function getSectionOnBoard(
{ sx, sy }: SectionPosition,
board: BoardData,
options: {
/**
* Whether the section data is only used for reading.
*
* If `true`, this function will return an empty section configured with default values, but will not add it to the board data to save storage.
*/
readOnly: boolean;
} = { readOnly: false },
): SectionData {
let section: SectionData;
if (!board.sections[sy] && !options.readOnly) board.sections[sy] = [];
if (!board.sections[sy]?.[sx]) {
section = createSection({ sx, sy }, board.config);
if (!options.readOnly) board.sections[sy][sx] = section;
} else {
section = board.sections[sy][sx];
}
return section;
}
export function applyChangeOnBoard(change: BoardChange, board: BoardData) {
const { sx, sy } = locateSection(change, board.config);
const section = board.sections[sy][sx];
const sPos = locateSection(change, board.config);
const section = getSectionOnBoard(sPos, board);
applyChange(change, section);
}
@ -59,8 +80,8 @@ export function renderFullBoard(data: BoardData): FullBoard {
continue;
}
const { sx, sy } = locateSection({ x, y }, data.config);
const section = data.sections[sy][sx];
const sPos = locateSection({ x, y }, data.config);
const section = getSectionOnBoard(sPos, data, { readOnly: true });
const xInSection = x % data.config.sectionWidth;
const yInSection = y % data.config.sectionHeight;