From 33e4934e8309184fed6443e3726463d1612bf4a0 Mon Sep 17 00:00:00 2001
From: Marcos Caceres <caceres_m@apple.com>
Date: Fri, 17 Oct 2025 14:05:21 +0800
Subject: [PATCH 1/4] Fix Issue #243: Add continuous monitoring for pre-lock
 conditions

- Added monitoring step in 'apply orientation lock' algorithm
- Ensures pre-lock conditions (fullscreen, installed app status) are continuously checked
- Automatically runs 'fully unlock' steps when conditions no longer hold
- Provides general catch-all beyond existing Fullscreen API integration
- Improves user experience and security by preventing stale orientation locks

Fixes #243
---
 index.html | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/index.html b/index.html
index 5b5f19c..5760d0d 100644
--- a/index.html
+++ b/index.html
@@ -668,6 +668,10 @@ <h2>
         `null`, [=reject and nullify the current lock promise=] of |document|
         with an {{"AbortError"}}.
         </li>
+        <li>If any [=pre-lock conditions=] are no longer met while [=in
+        parallel=], run the [=fully unlock the screen orientation steps=]
+        with |document|.
+        </li>
         <li>Let |topDocument| be |document|'s [=top-level browsing context=]'s
         [=navigable/active document=].
         </li>

From 8657a498ae8910ba75812d65d879fa41a2d067d5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marcos=20C=C3=A1ceres?= <caceres_m@apple.com>
Date: Tue, 21 Oct 2025 12:24:50 +0800
Subject: [PATCH 2/4] Update index.html

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
---
 index.html | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/index.html b/index.html
index aeb289b..156965f 100644
--- a/index.html
+++ b/index.html
@@ -669,9 +669,7 @@ <h2>
         `null`, [=reject and nullify the current lock promise=] of |document|
         with an {{"AbortError"}}.
         </li>
-        <li>If any [=pre-lock conditions=] are no longer met while [=in
-        parallel=], run the [=fully unlock the screen orientation steps=]
-        with |document|.
+        <li>[=In parallel=], if any [=pre-lock conditions=] are no longer met, run the [=fully unlock the screen orientation steps=] with |document|.
         </li>
         <li>Let |topDocument| be |document|'s [=top-level browsing context=]'s
         [=navigable/active document=].

From 7b01cabc445939a5d9b9cff222a605fbf519a3af Mon Sep 17 00:00:00 2001
From: Marcos Caceres <caceres_m@apple.com>
Date: Tue, 21 Oct 2025 12:26:08 +0800
Subject: [PATCH 3/4] tidy

---
 index.html | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/index.html b/index.html
index 156965f..e648542 100644
--- a/index.html
+++ b/index.html
@@ -669,7 +669,8 @@ <h2>
         `null`, [=reject and nullify the current lock promise=] of |document|
         with an {{"AbortError"}}.
         </li>
-        <li>[=In parallel=], if any [=pre-lock conditions=] are no longer met, run the [=fully unlock the screen orientation steps=] with |document|.
+        <li>[=In parallel=], if any [=pre-lock conditions=] are no longer met,
+        run the [=fully unlock the screen orientation steps=] with |document|.
         </li>
         <li>Let |topDocument| be |document|'s [=top-level browsing context=]'s
         [=navigable/active document=].
@@ -945,14 +946,14 @@ <h3>
       </ul>
       <p>
         The requirement for [=documents=] to be [=Document/fully active
-        descendant of a top-level traversable with user attention=] ensures that
-        orientation events are only delivered to
-        documents in windows that are both visible at the system level and have
-        the user's attention (either through focus or the ability to receive
-        keyboard input). The additional visibility state check provides defense
-        in depth. These restrictions prevent background tabs, hidden windows,
-        and minimized applications from collecting orientation data for
-        fingerprinting purposes.
+        descendant of a top-level traversable with user attention=] ensures
+        that orientation events are only delivered to documents in windows that
+        are both visible at the system level and have the user's attention
+        (either through focus or the ability to receive keyboard input). The
+        additional visibility state check provides defense in depth. These
+        restrictions prevent background tabs, hidden windows, and minimized
+        applications from collecting orientation data for fingerprinting
+        purposes.
       </p>
       <h3>
         Anti-fingerprinting Mitigations

From 8c197446b33f240275642d00758cfb9b1de1321c Mon Sep 17 00:00:00 2001
From: Marcos Caceres <caceres_m@apple.com>
Date: Mon, 16 Feb 2026 13:14:29 +1100
Subject: [PATCH 4/4] Match fullscreen spec changes

---
 index.html | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/index.html b/index.html
index de4a75b..5245573 100644
--- a/index.html
+++ b/index.html
@@ -882,10 +882,15 @@ <h2>
       </h2>
       <p>
         A user agent MUST restrict the use of {{ScreenOrientation/lock()}} to
-        simple fullscreen documents as a [=pre-lock condition=]. This
+        [=simple fullscreen documents=] as a [=pre-lock condition=]. This
         requirement prevents fingerprinting through differences in user agent
         behavior regarding orientation locking permissions. [[fullscreen]]
       </p>
+      <p>
+        If a [=document=] [=Document/has pending fullscreen request=], the user
+        agent MUST await the [=Document/pending fullscreen request promise=]
+        before evaluating the [=pre-lock conditions=]. [[fullscreen]]
+      </p>
       <p>
         When a [=document=] exits fullscreen, it also runs the [=fully unlock
         the screen orientation steps=]. [[fullscreen]]