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import colors from "tailwindcss/colors";
import { PendingSelection, Selection } from "../../selection";
import { CellRef } from "../../types";
import { RenderedCell, RenderedGrid } from "./renderGrid";
function fillBackground(ctx: CanvasRenderingContext2D, grid: RenderedGrid) {
ctx.clearRect(0, 0, grid.rect.width, grid.rect.height);
ctx.fillStyle = colors.neutral[900];
ctx.fillRect(0, 0, grid.rect.width, grid.rect.height);
}
function strokeGrid(ctx: CanvasRenderingContext2D, grid: RenderedGrid) {
ctx.strokeStyle = colors.neutral[700];
ctx.strokeRect(0.5, 0.5, grid.rect.width - 1, grid.rect.height - 1);
}
function strokeGridLines(ctx: CanvasRenderingContext2D, grid: RenderedGrid) {
ctx.strokeStyle = colors.neutral[800];
grid.renderedRows.forEach((row, renderedRowIndex) => {
const isLastRow = renderedRowIndex === grid.renderedRows.length - 1;
row.renderedCells.forEach((cell, cellIndex) => {
const { topLeft, width, height } = cell.rect;
const isLastCell = cellIndex === row.renderedCells.length - 1;
ctx.strokeRect(
topLeft.x + 0.5,
topLeft.y + 0.5,
isLastCell ? width - 1 : width,
isLastRow ? height - 1 : height,
);
});
});
}
function getRenderedCell(
grid: RenderedGrid,
cellRef: CellRef,
): RenderedCell | undefined {
const rowsPerPart = grid.renderedRows.length / grid.parts.length;
const renderedRowIndex = cellRef.partIndex * rowsPerPart + cellRef.rowIndex;
return grid.renderedRows[renderedRowIndex]?.renderedCells[cellRef.cellIndex];
}
function drawPendingSelection(
ctx: CanvasRenderingContext2D,
grid: RenderedGrid,
selection: PendingSelection,
) {}
function drawSelection(
ctx: CanvasRenderingContext2D,
grid: RenderedGrid,
selection: Selection,
) {
if (selection.gridId !== grid.id) return;
const cell = getRenderedCell(grid, selection.activeCellRef);
if (!cell) return;
const isLastCell = cell.rect.bottomRight.x === grid.rect.bottomRight.x;
const isLastRow = cell.rect.bottomRight.y === grid.rect.bottomRight.y;
// ctx.fillStyle = colors.green[4] + "30";
// ctx.fillRect(
// cell.rect.topLeft.x + 1,
// cell.rect.topLeft.y + 1,
// cell.rect.width - 1,
// cell.rect.height - 1,
// );
ctx.strokeStyle = colors.green[400];
ctx.lineWidth = 2;
ctx.strokeRect(
cell.rect.topLeft.x + 1,
cell.rect.topLeft.y + 1,
isLastCell ? cell.rect.width - 2 : cell.rect.width - 1,
isLastRow ? cell.rect.height - 2 : cell.rect.height - 1,
);
}
export default function drawGrid(
ctx: CanvasRenderingContext2D,
grid: RenderedGrid,
selection?: Selection,
pendingSelection?: PendingSelection,
) {
const excursion = (f: () => void) => {
ctx.save();
f();
ctx.restore();
};
excursion(() => fillBackground(ctx, grid));
excursion(() => strokeGridLines(ctx, grid));
excursion(() => strokeGrid(ctx, grid));
if (pendingSelection) {
excursion(() => drawPendingSelection(ctx, grid, pendingSelection));
} else if (selection) {
excursion(() => drawSelection(ctx, grid, selection));
}
}
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