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import h, { type CreateElement } from "../../html";
import { CellRef } from "../../types";
import cellAtCoord from "./cellAtCoord";
import drawGrid, { getGridColors } from "./drawGrid";
import "./index.css";
class NotiveGridElement extends HTMLElement {
#gridId!: string;
get gridId() {
return this.#gridId;
}
set gridId(val: string) {
this.#gridId = val;
this.setAttribute("grid-id", val);
}
get renderedGrid() {
return window.notive.getGrid(this.#gridId)!;
}
canvasEl: HTMLCanvasElement = h.canvas();
connectedCallback() {
if (!this.gridId) {
throw new Error("ntv-grid requries gridId attribute");
}
window.addEventListener("ntv:selectionchange", () => this.draw());
this.canvasEl.addEventListener(
"mousedown",
this.#canvasMouseDownCallback.bind(this),
);
this.append(this.canvasEl);
this.draw();
}
draw() {
const ctx = this.canvasEl.getContext("2d");
if (!ctx) throw new Error("Unable to get canvas context");
const grid = window.notive.getGrid(this.gridId);
if (!grid) return;
this.canvasEl.setAttribute("width", grid.rect.width + "px");
this.canvasEl.setAttribute("height", grid.rect.height + "px");
const colors = getGridColors(this);
drawGrid(
ctx,
colors,
grid,
window.notive.selection,
window.notive.pendingSelection,
);
}
#mouseEventCellRef(
this: NotiveGridElement,
event: MouseEvent,
): CellRef | undefined {
const clientRect = this.canvasEl.getBoundingClientRect();
const x = event.x - clientRect.x;
const y = event.y - clientRect.y;
return cellAtCoord(this.renderedGrid, x, y);
}
#canvasMouseDownCallback(this: NotiveGridElement, event: MouseEvent) {
const cellRef = this.#mouseEventCellRef(event);
if (!cellRef) return;
window.notive.startSelecting(this.gridId, cellRef);
this.#selectionAbortController = new AbortController();
const { signal } = this.#selectionAbortController;
window.addEventListener(
"mousemove",
this.#selectionMouseMoveCallback.bind(this),
{ signal },
);
window.addEventListener(
"mouseup",
this.#selectionMouseUpCallback.bind(this),
{ signal },
);
}
#selectionAbortController?: AbortController;
#selectionMouseMoveCallback(this: NotiveGridElement, event: MouseEvent) {
const cellRef = this.#mouseEventCellRef(event);
if (!cellRef) return;
window.notive.extendSelection(cellRef);
}
#selectionMouseUpCallback(this: NotiveGridElement, event: MouseEvent) {
this.#selectionAbortController?.abort();
this.#selectionAbortController = undefined;
window.notive.finishSelecting();
}
}
customElements.define("ntv-grid", NotiveGridElement);
export default ((...args: any[]): NotiveGridElement =>
(h as any)["ntv-grid"](...args)) as CreateElement<NotiveGridElement>;
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