Add tests, support #rrggbbaa in css.toColor

2020-06-10 18:37:13 -07:00
parent 4c943ddb0d
commit 98d0760898
2 changed files with 65 additions and 5 deletions
@@ -88,10 +88,19 @@ export namespace color {
 */
 export namespace css {
  export function toColor(css: string): IColor {
-    return {
-      css,
-      rgba: (parseInt(css.slice(1), 16) << 8 | 0xFF) >>> 0
-    };
+    switch (css.length) {
+      case 7: // #rrggbb
+        return {
+          css,
+          rgba: (parseInt(css.slice(1), 16) << 8 | 0xFF) >>> 0
+        };
+      case 9: // #rrggbbaa
+        return {
+          css,
+          rgba: parseInt(css.slice(1), 16) >>> 0
+        };
+    }
+    throw new Error('css.toColor: Unsupported css format');
  }
 }