duu

js/display_helpers.js

@@ -0,0 +1,36 @@
+"use strict";
+
+// Layer: display/helpers
+// Shared canvas and display-label helpers used by render, item, creature, and weather modules.
+(function (global) {
+  const WEATHER_LABELS = Object.freeze({ sunny: "\u6674\u308c", cloudy: "\u66c7\u308a", light_rain: "\u5c0f\u96e8" });
+
+  function canvasEllipsizeText(ctx, text, maxW) {
+    let s = String(text || "");
+    const limit = Number(maxW);
+    if (!ctx || !Number.isFinite(limit) || limit <= 0) return s ? "\u2026" : "";
+    if (ctx.measureText(s).width <= limit) return s;
+    while (s.length > 1 && ctx.measureText(`${s}\u2026`).width > limit) s = s.slice(0, -1);
+    return `${s}\u2026`;
+  }
+
+  function roundedRect(ctx, x, y, w, h, r) {
+    if (!ctx) return;
+    const radius = Math.max(0, Math.min(Math.abs(Number(r) || 0), Math.abs(Number(w) || 0) * 0.5, Math.abs(Number(h) || 0) * 0.5));
+    ctx.beginPath();
+    ctx.moveTo(x + radius, y);
+    ctx.arcTo(x + w, y, x + w, y + h, radius);
+    ctx.arcTo(x + w, y + h, x, y + h, radius);
+    ctx.arcTo(x, y + h, x, y, radius);
+    ctx.arcTo(x, y, x + w, y, radius);
+    ctx.closePath();
+  }
+
+  function weatherLabel(weather = "sunny") {
+    return WEATHER_LABELS[String(weather || "sunny")] || WEATHER_LABELS.sunny;
+  }
+
+  global.canvasEllipsizeText = canvasEllipsizeText;
+  global.roundedRect = roundedRect;
+  global.weatherLabel = weatherLabel;
+})(typeof window !== "undefined" ? window : globalThis);