treehouse/static/js/components/tairu/proto.js

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import { TileEditor } from 'tairu/editor.js';
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export function alignTextInRectangle(ctx, text, x, y, width, height, hAlign, vAlign) {
let measurements = ctx.measureText(text);
let leftX;
switch (hAlign) {
case "left":
leftX = x;
break;
case "center":
leftX = x + width / 2 - measurements.width / 2;
break;
case "right":
leftX = x + width - measurements.width;
break;
}
let textHeight = measurements.fontBoundingBoxAscent;
let baselineY;
switch (vAlign) {
case "top":
baselineY = y + textHeight;
break;
case "center":
baselineY = y + height / 2 + textHeight / 2;
break;
case "bottom":
baselineY = y + height;
break;
}
return { leftX, baselineY };
}
export function shouldConnect(a, b) {
return a == b;
}
export class TileEditorWithCardinalDirections extends TileEditor {
constructor(options) {
super(options);
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this.colorScheme.tiles[1] = "#f96565";
}
drawConnectionText(text, enabled, tileX, tileY, hAlign, vAlign) {
this.ctx.beginPath();
this.ctx.fillStyle = enabled ? "#6c023e" : "#d84161";
this.ctx.font = `800 14px ${Frame.monoFontFace}`;
const padding = 2;
let topLeftX = tileX * this.tileSize + padding;
let topLeftY = tileY * this.tileSize + padding;
let rectSize = this.tileSize - padding * 2;
let { leftX, baselineY } = this.getTextPositionInBox(text, topLeftX, topLeftY, rectSize, rectSize, hAlign, vAlign);
this.ctx.fillText(text, leftX, baselineY);
}
drawTiles() {
super.drawTiles();
for (let y = 0; y < this.tilemap.height; ++y) {
for (let x = 0; x < this.tilemap.width; ++x) {
let tile = this.tilemap.at(x, y);
if (canConnect(tile)) {
let connectedWithEast = shouldConnect(tile, this.tilemap.at(x + 1, y));
let connectedWithSouth = shouldConnect(tile, this.tilemap.at(x, y + 1));
let connectedWithNorth = shouldConnect(tile, this.tilemap.at(x, y - 1));
let connectedWithWest = shouldConnect(tile, this.tilemap.at(x - 1, y));
this.drawConnectionText("E", connectedWithEast, x, y, "right", "center");
this.drawConnectionText("S", connectedWithSouth, x, y, "center", "bottom");
this.drawConnectionText("N", connectedWithNorth, x, y, "center", "top");
this.drawConnectionText("W", connectedWithWest, x, y, "left", "center");
}
}
}
}
}