Files
orca/mobile/modules
Jinwoo Hong 9cdbc0c128 fix(mobile): keep the shell's window insets out of the page WebView (OTA phase C follow-up) (#22549)
* fix(mobile-web): stop the page declaring viewport-fit=cover

The shell already pads the WebView out of the status and navigation bars. With
viewport-fit=cover, Android's edge-to-edge WebView still reports the window's
bar insets through env(safe-area-inset-*), which react-native-safe-area-context
on web reads, so every page-side SafeAreaView padded a full bar a second time.
Without it env() reads 0 and the shell's pad is the only one.

Claude-Session: https://claude.ai/code/session_01JNnE9qzUZMMnqpZWCqM3nb

* fix(mobile): keep the shell's window insets out of the page WebView

WebView M144+ forwards the window's systemBars and displayCutout insets to
CSS env(safe-area-inset-*) for every WebView, and Chromium applies them
regardless of viewport-fit. The shell already pads the WebView out of both
bars, so every page-side SafeAreaView (expo-router's DefaultNavigator and the
session header) padded a bar a second time. M139+ likewise resizes the visual
viewport for ime(), which the shell has already done by shortening the WebView.

The WebView now sees those three types zeroed, per Android's "zeroing" approach
(not CONSUMED, so later changes still reach it). A listener replaces the
WebView's own onApplyWindowInsets, so the zeroed set is passed back into it.

iOS needs nothing: the WKWebView uses contentInsetAdjustmentBehavior = .never
inside the padded shell and reports zero insets.

Claude-Session: https://claude.ai/code/session_01JNnE9qzUZMMnqpZWCqM3nb

* docs(mobile-web): say why the page declares no viewport-fit

The earlier comment claimed dropping viewport-fit=cover makes env() read 0 on
Android; Chromium's WebView applies the safe area regardless of viewport-fit.
The page simply never asks to extend under the bars, and the shell owns the
safe area.

Claude-Session: https://claude.ai/code/session_01JNnE9qzUZMMnqpZWCqM3nb

* refactor(mobile): keep the page inset zeroing private to the shell view

The transformation has no honest JVM test (the builder runs as SDK 0 there
and drops every inset type), so it moves into MobileWebShellView.kt as
private members instead of standing alone. The listener comment now covers
both the P-R listener and the S+ onApplyWindowInsets path it replaces, and
the page document's comment says the env() zeroing is Android's; on iOS the
padded WKWebView reports none.

Claude-Session: https://claude.ai/code/session_01JNnE9qzUZMMnqpZWCqM3nb
2026-09-23 17:13:23 -04:00
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