1 files changed, 39 insertions, 0 deletions
diff --git a/packages/meshbay-android/app/src/main/assets/bridge/meshbay-bridge.js b/packages/meshbay-android/app/src/main/assets/bridge/meshbay-bridge.js
index e8b40b2d..e78a2337 100644
--- a/packages/meshbay-android/app/src/main/assets/bridge/meshbay-bridge.js
+++ b/packages/meshbay-android/app/src/main/assets/bridge/meshbay-bridge.js
@@ -46,6 +46,45 @@
     port.postMessage(JSON.stringify({ id, ch: channel, args }));
   });
 
+  // The Screen Wake Lock API, which Chrome has and the WebView does not: the
+  // video player (and music, when asked) holds it so the screen does not time
+  // out mid-film. Held natively as the WebView's keepScreenOn, and released
+  // when the page hides, as the API does. Cleared first, for a reload that
+  // left one held.
+  if (!('wakeLock' in navigator)) {
+    const held = new Set();
+    const sync = () => call('screen:keep-on', held.size > 0).catch(() => {});
+    class WakeLockSentinel extends EventTarget {
+      constructor() { super(); this.type = 'screen'; this.released = false; this.onrelease = null; }
+      release() {
+        if (!this.released) {
+          this.released = true;
+          held.delete(this);
+          sync();
+          const event = new Event('release');
+          if (typeof this.onrelease === 'function') this.onrelease(event);
+          this.dispatchEvent(event);
+        }
+        return Promise.resolve();
+      }
+    }
+    const request = (type) => {
+      if (type !== 'screen') return Promise.reject(new TypeError('Unsupported wake lock type'));
+      if (document.visibilityState !== 'visible') {
+        return Promise.reject(new DOMException('The page is not visible', 'NotAllowedError'));
+      }
+      const sentinel = new WakeLockSentinel();
+      held.add(sentinel);
+      sync();
+      return Promise.resolve(sentinel);
+    };
+    document.addEventListener('visibilitychange', () => {
+      if (document.visibilityState !== 'visible') [...held].forEach((s) => s.release());
+    });
+    Object.defineProperty(navigator, 'wakeLock', { value: Object.freeze({ request }) });
+    sync();
+  }
+
   // A write is a binary message: "MBB1" | id | channel | 0 | handle | bytes,
   // big-endian — one copy, no JSON, no base64 (spike S-3: 136 MB/s awaited
   // per 48 KB chunk). Without ArrayBuffer messages, base64 over JSON.