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import Ratio from "../../math/Ratio";
import Rect from "../../math/Rect";
import { Cell, CellRef, Grid, Row, RowRef } from "../../types";
export interface RenderedCell extends Cell {
cellRef: CellRef;
renderedRowIndex: number;
rect: Rect;
startRatio: Ratio;
endRatio: Ratio;
}
export interface RenderedRow {
rowRef: RowRef;
rect: Rect;
renderedCells: RenderedCell[];
}
export interface RenderedGrid extends Grid {
rect: Rect;
renderedRows: RenderedRow[];
}
function renderCell(
grid: Grid,
cell: Cell,
cellRef: CellRef,
renderedRowIndex: number,
topLeftX: number,
topLeftY: number,
startRatio: Ratio,
): RenderedCell {
const width = cell.widthRatio
.divideRatio(grid.baseCellWidthRatio)
.multiplyRatio(Ratio.fromInteger(grid.baseCellSize))
.toNumber();
const rect = new Rect(topLeftX, topLeftY, width, grid.baseCellSize);
const endRatio = startRatio.add(cell.widthRatio);
return { ...cell, cellRef, rect, renderedRowIndex, startRatio, endRatio };
}
function renderRow(
grid: Grid,
row: Row,
rowRef: RowRef,
renderedRowIndex: number,
topLeftY: number,
): RenderedRow {
if (row.cells.length === 0) {
return {
...row,
rowRef,
rect: new Rect(0, topLeftY, 0, 0),
renderedCells: [],
};
}
let topLeftX = 0;
let startRatio = Ratio.fromInteger(0);
const renderedCells = row.cells.map((cell, cellIndex) => {
const cellRef = { ...rowRef, cellIndex };
const renderedCell = renderCell(
grid,
cell,
cellRef,
renderedRowIndex,
topLeftX,
topLeftY,
startRatio,
);
topLeftX = renderedCell.rect.bottomRight.x;
startRatio = renderedCell.endRatio;
return renderedCell;
});
const { topLeft } = renderedCells[0].rect;
const { bottomRight } = renderedCells.at(-1)!.rect;
const rect = new Rect(
topLeft.x,
topLeft.y,
bottomRight.x - topLeft.x,
bottomRight.y - topLeft.y,
);
return { ...row, renderedCells, rect, rowRef };
}
function renderRows(grid: Grid): RenderedRow[] {
const renderedRows: RenderedRow[] = [];
let partIndex = 0;
let rowIndex = 0;
let topLeftY = 0;
let renderedRowIndex = 0;
while (true) {
if (!grid.parts[partIndex]?.rows[rowIndex]) break;
const row = grid.parts[partIndex].rows[rowIndex];
const rowRef = { partIndex, rowIndex };
const renderedRow = renderRow(
grid,
row,
rowRef,
renderedRowIndex,
topLeftY,
);
topLeftY = renderedRow.rect.bottomRight.y;
renderedRows.push(renderedRow);
if (!grid.parts[++partIndex]) {
partIndex = 0;
rowIndex++;
}
renderedRowIndex++;
}
return renderedRows;
}
export default function renderGrid(grid: Grid) {
const renderedRows = renderRows(grid);
const rect = renderedRows[0].rect.extend(renderedRows.at(-1)!.rect);
return { ...grid, rect, renderedRows };
}
export function getRenderedCell(
grid: RenderedGrid,
cellRef: CellRef,
): RenderedCell | undefined {
const renderedRowIndex =
cellRef.rowIndex * grid.parts.length + cellRef.partIndex;
return grid.renderedRows[renderedRowIndex]?.renderedCells[cellRef.cellIndex];
}
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