feat: animate hovered chapter titles and active seek segments

2026-10-25 03:09:34 +01:00
parent 119fe2e737
commit edb17f76e3
5 changed files with 198 additions and 12 deletions
@@ -193,6 +193,15 @@ struct YouTubeResolverChecks {
                    "missing, null and malformed optional titles do not discard chapters")
        try require(decoded.chapterBoundaries(duration: 12) == [2.25, 8.75],
                    "chapter edges are sorted, deduplicated and strictly interior")
+        try require(decoded.chapterTitle(at: 0, duration: 12) == "Opening" &&
+                    decoded.chapterTitle(at: 2.249, duration: 12) == "Opening" &&
+                    decoded.chapterTitle(at: 2.25, duration: 12) == nil &&
+                    decoded.chapterTitle(at: 12, duration: 12) == nil,
+                    "hover titles include chapter start, exclude its end and never invent missing titles")
+        for duration in [0, -1, 1, Double.nan, .infinity] {
+            try require(decoded.chapterTitle(at: 0.5, duration: duration) == nil,
+                        "unknown durations and chapters extending beyond media have no hover title")
+        }

        object["duration"] = 0
        object["chapters"] = [["start_time": 0, "end_time": 2.25],