1 files changed, 139 insertions, 0 deletions
diff --git a/src/components/PolicyUpdateOverlay/Overlay.tsx b/src/components/PolicyUpdateOverlay/Overlay.tsx
new file mode 100644
index 000000000..dd071ef15
--- /dev/null
+++ b/src/components/PolicyUpdateOverlay/Overlay.tsx
@@ -0,0 +1,139 @@
+import {type ReactNode} from 'react'
+import {ScrollView, View} from 'react-native'
+import {
+  useSafeAreaFrame,
+  useSafeAreaInsets,
+} from 'react-native-safe-area-context'
+import {LinearGradient} from 'expo-linear-gradient'
+
+import {isAndroid, isNative} from '#/platform/detection'
+import {useA11y} from '#/state/a11y'
+import {atoms as a, flatten, useBreakpoints, useTheme, web} from '#/alf'
+import {transparentifyColor} from '#/alf/util/colorGeneration'
+import {FocusScope} from '#/components/FocusScope'
+import {LockScroll} from '#/components/LockScroll'
+
+const GUTTER = 24
+
+export function Overlay({
+  children,
+  label,
+}: {
+  children: ReactNode
+  label: string
+}) {
+  const t = useTheme()
+  const {gtPhone} = useBreakpoints()
+  const {reduceMotionEnabled} = useA11y()
+  const insets = useSafeAreaInsets()
+  const frame = useSafeAreaFrame()
+
+  return (
+    <>
+      <LockScroll />
+
+      <View style={[a.fixed, a.inset_0, !reduceMotionEnabled && a.fade_in]}>
+        {gtPhone ? (
+          <View style={[a.absolute, a.inset_0, {opacity: 0.8}]}>
+            <View
+              style={[
+                a.fixed,
+                a.inset_0,
+                {backgroundColor: t.palette.black},
+                !reduceMotionEnabled && a.fade_in,
+              ]}
+            />
+          </View>
+        ) : (
+          <LinearGradient
+            colors={[
+              transparentifyColor(t.atoms.bg.backgroundColor, 0),
+              t.atoms.bg.backgroundColor,
+              t.atoms.bg.backgroundColor,
+            ]}
+            start={[0.5, 0]}
+            end={[0.5, 1]}
+            style={[a.absolute, a.inset_0]}
+          />
+        )}
+      </View>
+
+      <ScrollView
+        showsVerticalScrollIndicator={false}
+        style={[
+          a.z_10,
+          gtPhone &&
+            web({
+              paddingHorizontal: GUTTER,
+              paddingVertical: '10vh',
+            }),
+        ]}
+        contentContainerStyle={[a.align_center]}>
+        {/**
+         * This is needed to prevent centered dialogs from overflowing
+         * above the screen, and provides a "natural" centering so that
+         * stacked dialogs appear relatively aligned.
+         */}
+        <View
+          style={[
+            a.w_full,
+            a.z_20,
+            a.align_center,
+            !gtPhone && [a.justify_end, {minHeight: frame.height}],
+            isNative && [
+              {
+                paddingBottom: Math.max(insets.bottom, a.p_2xl.padding),
+              },
+            ],
+          ]}>
+          {!gtPhone && (
+            <View
+              style={[
+                a.flex_1,
+                a.w_full,
+                {
+                  minHeight: Math.max(insets.top, a.p_2xl.padding),
+                },
+              ]}>
+              <LinearGradient
+                colors={[
+                  transparentifyColor(t.atoms.bg.backgroundColor, 0),
+                  t.atoms.bg.backgroundColor,
+                ]}
+                start={[0.5, 0]}
+                end={[0.5, 1]}
+                style={[a.absolute, a.inset_0]}
+              />
+            </View>
+          )}
+
+          <FocusScope>
+            <View
+              accessible={isAndroid}
+              role="dialog"
+              aria-role="dialog"
+              aria-label={label}
+              style={flatten([
+                a.relative,
+                a.w_full,
+                a.p_2xl,
+                t.atoms.bg,
+                !reduceMotionEnabled && a.zoom_fade_in,
+                gtPhone && [
+                  a.rounded_md,
+                  a.border,
+                  t.atoms.shadow_lg,
+                  t.atoms.border_contrast_low,
+                  web({
+                    maxWidth: 420,
+                  }),
+                ],
+              ])}>
+              {children}
+            </View>
+          </FocusScope>
+        </View>
+      </ScrollView>
+    </>
+  )
+}