deps: Upgrade Flutter to 3.25.0-1.0.pre.296

And update Flutter's supporting libraries to match.

Also, as anticipated in zulip#920 (see PR description), handle some
deprecations in the Color API from flutter/engine@eff1b76cf (rolled
in flutter/flutter@8c1a93508). Deprecation warnings are "info"-level
in analyzer output, and CI treats that as fatal, because we don't
want to let those hang around.

In particular, `withOpacity` is replaced with the new `withValues`.

Also, `value` is newly deprecated, but we migrated off that in the
previous commit.

lib/widgets/channel_colors.dart

@@ -123,7 +123,7 @@ class ChannelColorSwatch extends ColorSwatch<ChannelColorVariant> {
       // TODO fix bug where our results differ from the replit's (see unit tests)
       ChannelColorVariant.unreadCountBadgeBackground:
         clampLchLightness(baseAsColor, 30, 70)
-          .withOpacity(0.3),
+          .withValues(alpha: 0.3),
 
       // Follows `.sidebar-row__icon` in Vlad's replit:
       //   <https://replit.com/@VladKorobov/zulip-sidebar#script.js>
@@ -169,7 +169,7 @@ class ChannelColorSwatch extends ColorSwatch<ChannelColorVariant> {
       ChannelColorVariant.base: baseAsColor,
       ChannelColorVariant.unreadCountBadgeBackground:
         clampLchLightness(baseAsColor, 30, 70)
-          .withOpacity(0.3),
+          .withValues(alpha: 0.3),
       ChannelColorVariant.iconOnPlainBackground: clamped20to75,
 
       // Follows the web app (as of zulip/zulip@db03369ac); see

lib/widgets/compose_box.dart

@@ -846,12 +846,12 @@ class _SendButtonState extends State<_SendButton> {
 
     // Copy FilledButton defaults (_FilledButtonDefaultsM3.backgroundColor)
     final backgroundColor = disabled
-      ? colorScheme.onSurface.withOpacity(0.12)
+      ? colorScheme.onSurface.withValues(alpha: 0.12)
       : colorScheme.primary;
 
     // Copy FilledButton defaults (_FilledButtonDefaultsM3.foregroundColor)
     final foregroundColor = disabled
-      ? colorScheme.onSurface.withOpacity(0.38)
+      ? colorScheme.onSurface.withValues(alpha: 0.38)
       : colorScheme.onPrimary;
 
     return Ink(

lib/widgets/content.dart

@@ -66,7 +66,7 @@ class ContentTheme extends ThemeExtension<ContentTheme> {
       colorGlobalTimeBorder: const HSLColor.fromAHSL(0.4, 0, 0, 0).toColor(),
       colorMathBlockBorder: const HSLColor.fromAHSL(1, 240, 0.4, 0.4).toColor(),
       colorMessageMediaContainerBackground: const HSLColor.fromAHSL(0.03, 0, 0, 1).toColor(),
-      colorThematicBreak: const HSLColor.fromAHSL(1, 0, 0, .87).toColor().withOpacity(0.2),
+      colorThematicBreak: const HSLColor.fromAHSL(1, 0, 0, .87).toColor().withValues(alpha: 0.2),
       textStylePlainParagraph: _plainParagraphCommon(context).copyWith(
         color: const HSLColor.fromAHSL(0.75, 0, 0, 1).toColor(),
         debugLabel: 'ContentTheme.textStylePlainParagraph'),

lib/widgets/draggable_scrollable_modal_bottom_sheet.dart

@@ -73,7 +73,7 @@ class _DragHandleLayer extends StatelessWidget {
             //   https://m3.material.io/components/bottom-sheets/specs#7c093473-d9e1-48f3-9659-b75519c2a29d
             height: 4,
             width: 32,
-            child: ColoredBox(color: colorScheme.onSurfaceVariant.withOpacity(0.40))))));
+            child: ColoredBox(color: colorScheme.onSurfaceVariant.withValues(alpha: 0.40))))));
   }
 }
 

lib/widgets/emoji_reaction.dart

@@ -24,23 +24,23 @@ class EmojiReactionTheme extends ThemeExtension<EmojiReactionTheme> {
       //   want to check that against web when implementing the shadow.
       bgUnselected: const HSLColor.fromAHSL(0.08, 210, 0.50, 0.875).toColor(),
 
-      borderSelected: Colors.black.withOpacity(0.45),
+      borderSelected: Colors.black.withValues(alpha: 0.45),
 
       // TODO see TODO on [bgUnselected] about shadow effect
-      borderUnselected: Colors.black.withOpacity(0.05),
+      borderUnselected: Colors.black.withValues(alpha: 0.05),
 
       textSelected: const HSLColor.fromAHSL(1, 210, 0.20, 0.20).toColor(),
       textUnselected: const HSLColor.fromAHSL(1, 210, 0.20, 0.25).toColor(),
     );
 
   EmojiReactionTheme.dark() :
     this._(
-      bgSelected: Colors.black.withOpacity(0.8),
-      bgUnselected: Colors.black.withOpacity(0.3),
-      borderSelected: Colors.white.withOpacity(0.75),
-      borderUnselected: Colors.white.withOpacity(0.15),
-      textSelected: Colors.white.withOpacity(0.85),
-      textUnselected: Colors.white.withOpacity(0.75),
+      bgSelected: Colors.black.withValues(alpha: 0.8),
+      bgUnselected: Colors.black.withValues(alpha: 0.3),
+      borderSelected: Colors.white.withValues(alpha: 0.75),
+      borderUnselected: Colors.white.withValues(alpha: 0.15),
+      textSelected: Colors.white.withValues(alpha: 0.85),
+      textUnselected: Colors.white.withValues(alpha: 0.75),
     );
 
   EmojiReactionTheme._({
@@ -168,7 +168,7 @@ class ReactionChip extends StatelessWidget {
     final labelColor =      selfVoted ? reactionTheme.textSelected   : reactionTheme.textUnselected;
     final backgroundColor = selfVoted ? reactionTheme.bgSelected     : reactionTheme.bgUnselected;
     final splashColor =     selfVoted ? reactionTheme.bgUnselected   : reactionTheme.bgSelected;
-    final highlightColor =  splashColor.withOpacity(0.5);
+    final highlightColor =  splashColor.withValues(alpha: 0.5);
 
     final borderSide = BorderSide(
       color: borderColor,

lib/widgets/lightbox.dart

@@ -145,7 +145,7 @@ class _LightboxPageLayoutState extends State<_LightboxPageLayout> {
   Widget build(BuildContext context) {
     final themeData = Theme.of(context);
 
-    final appBarBackgroundColor = Colors.grey.shade900.withOpacity(0.87);
+    final appBarBackgroundColor = Colors.grey.shade900.withValues(alpha: 0.87);
     const appBarForegroundColor = Colors.white;
     const appBarElevation = 0.0;
 

lib/widgets/message_list.dart

@@ -39,7 +39,7 @@ class MessageListTheme extends ThemeExtension<MessageListTheme> {
       senderBotIcon: const HSLColor.fromAHSL(1, 180, 0.08, 0.65).toColor(),
       senderName: const HSLColor.fromAHSL(1, 0, 0, 0.2).toColor(),
       streamMessageBgDefault: Colors.white,
-      streamRecipientHeaderChevronRight: Colors.black.withOpacity(0.3),
+      streamRecipientHeaderChevronRight: Colors.black.withValues(alpha: 0.3),
 
       // From the Figma mockup at:
       //   https://www.figma.com/file/1JTNtYo9memgW7vV6d0ygq/Zulip-Mobile?node-id=132-9684
@@ -49,7 +49,7 @@ class MessageListTheme extends ThemeExtension<MessageListTheme> {
       // in both light and dark theme.)
       unreadMarker: const HSLColor.fromAHSL(1, 227, 0.78, 0.59).toColor(),
 
-      unreadMarkerGap: Colors.white.withOpacity(0.6),
+      unreadMarkerGap: Colors.white.withValues(alpha: 0.6),
 
       // TODO(design) this seems ad-hoc; is there a better color?
       unsubscribedStreamRecipientHeaderBg: const Color(0xfff5f5f5),
@@ -67,7 +67,7 @@ class MessageListTheme extends ThemeExtension<MessageListTheme> {
       senderBotIcon: const HSLColor.fromAHSL(1, 180, 0.05, 0.5).toColor(),
       senderName: const HSLColor.fromAHSL(0.85, 0, 0, 1).toColor(),
       streamMessageBgDefault: const HSLColor.fromAHSL(1, 0, 0, 0.15).toColor(),
-      streamRecipientHeaderChevronRight: Colors.white.withOpacity(0.3),
+      streamRecipientHeaderChevronRight: Colors.white.withValues(alpha: 0.3),
 
       // 0.75 opacity from here:
       //   https://www.figma.com/design/1JTNtYo9memgW7vV6d0ygq/Zulip-Mobile?node-id=807-33998&m=dev

lib/widgets/theme.dart

@@ -107,7 +107,7 @@ class DesignVariables extends ThemeExtension<DesignVariables> {
   DesignVariables.light() :
     this._(
       background: const Color(0xffffffff),
-      bgCounterUnread: const Color(0xff666699).withOpacity(0.15),
+      bgCounterUnread: const Color(0xff666699).withValues(alpha: 0.15),
       bgTopBar: const Color(0xfff5f5f5),
       borderBar: const Color(0x33000000),
       icon: const Color(0xff666699),
@@ -121,26 +121,26 @@ class DesignVariables extends ThemeExtension<DesignVariables> {
       errorBannerBackground: const HSLColor.fromAHSL(1, 4, 0.33, 0.90).toColor(),
       errorBannerBorder: const HSLColor.fromAHSL(0.4, 3, 0.57, 0.33).toColor(),
       errorBannerLabel: const HSLColor.fromAHSL(1, 4, 0.58, 0.33).toColor(),
-      groupDmConversationIcon: Colors.black.withOpacity(0.5),
+      groupDmConversationIcon: Colors.black.withValues(alpha: 0.5),
       groupDmConversationIconBg: const Color(0x33808080),
       loginOrDivider: const Color(0xffdedede),
       loginOrDividerText: const Color(0xff575757),
       sectionCollapseIcon: const Color(0x7f1e2e48),
       star: const HSLColor.fromAHSL(0.5, 47, 1, 0.41).toColor(),
       subscriptionListHeaderLine: const HSLColor.fromAHSL(0.2, 240, 0.1, 0.5).toColor(),
       subscriptionListHeaderText: const HSLColor.fromAHSL(1.0, 240, 0.1, 0.5).toColor(),
-      unreadCountBadgeTextForChannel: Colors.black.withOpacity(0.9),
+      unreadCountBadgeTextForChannel: Colors.black.withValues(alpha: 0.9),
     );
 
   DesignVariables.dark() :
     this._(
       background: const Color(0xff000000),
-      bgCounterUnread: const Color(0xff666699).withOpacity(0.37),
+      bgCounterUnread: const Color(0xff666699).withValues(alpha: 0.37),
       bgTopBar: const Color(0xff242424),
-      borderBar: Colors.black.withOpacity(0.41),
+      borderBar: Colors.black.withValues(alpha: 0.41),
       icon: const Color(0xff7070c2),
-      labelCounterUnread: const Color(0xffffffff).withOpacity(0.7),
-      labelMenuButton: const Color(0xffffffff).withOpacity(0.85),
+      labelCounterUnread: const Color(0xffffffff).withValues(alpha: 0.7),
+      labelMenuButton: const Color(0xffffffff).withValues(alpha: 0.85),
       mainBackground: const Color(0xff1d1d1d),
       title: const Color(0xffffffff),
       channelColorSwatches: ChannelColorSwatches.dark,
@@ -151,7 +151,7 @@ class DesignVariables extends ThemeExtension<DesignVariables> {
       errorBannerBorder: const HSLColor.fromAHSL(0.4, 3, 0.73, 0.74).toColor(),
       errorBannerLabel: const HSLColor.fromAHSL(1, 2, 0.73, 0.80).toColor(),
       // TODO(design-dark) need proper dark-theme color (this is ad hoc)
-      groupDmConversationIcon: Colors.white.withOpacity(0.5),
+      groupDmConversationIcon: Colors.white.withValues(alpha: 0.5),
       // TODO(design-dark) need proper dark-theme color (this is ad hoc)
       groupDmConversationIconBg: const Color(0x33cccccc),
       loginOrDivider: const Color(0xff424242),
@@ -164,7 +164,7 @@ class DesignVariables extends ThemeExtension<DesignVariables> {
       subscriptionListHeaderLine: const HSLColor.fromAHSL(0.4, 240, 0.1, 0.75).toColor(),
       // TODO(design-dark) need proper dark-theme color (this is ad hoc)
       subscriptionListHeaderText: const HSLColor.fromAHSL(1.0, 240, 0.1, 0.75).toColor(),
-      unreadCountBadgeTextForChannel: Colors.white.withOpacity(0.9),
+      unreadCountBadgeTextForChannel: Colors.white.withValues(alpha: 0.9),
     );
 
   DesignVariables._({

pubspec.lock

@@ -5,10 +5,10 @@ packages:
     dependency: transitive
     description:
       name: _fe_analyzer_shared
-      sha256: "45cfa8471b89fb6643fe9bf51bd7931a76b8f5ec2d65de4fb176dba8d4f22c77"
+      sha256: f6dbf021f4b214d85c79822912c5fcd142a2c4869f01222ad371bc51f9f1c356
       url: "https://pub.dev"
     source: hosted
-    version: "73.0.0"
+    version: "74.0.0"
   _flutterfire_internals:
     dependency: transitive
     description:
@@ -21,15 +21,15 @@ packages:
     dependency: transitive
     description: dart
     source: sdk
-    version: "0.3.2"
+    version: "0.3.3"
   analyzer:
     dependency: transitive
     description:
       name: analyzer
-      sha256: "4959fec185fe70cce007c57e9ab6983101dbe593d2bf8bbfb4453aaec0cf470a"
+      sha256: f7e8caf82f2d3190881d81012606effdf8a38e6c1ab9e30947149733065f817c
       url: "https://pub.dev"
     source: hosted
-    version: "6.8.0"
+    version: "6.9.0"
   analyzer_plugin:
     dependency: transitive
     description:
@@ -663,18 +663,18 @@ packages:
     dependency: transitive
     description:
       name: leak_tracker
-      sha256: "3f87a60e8c63aecc975dda1ceedbc8f24de75f09e4856ea27daf8958f2f0ce05"
+      sha256: "7bb2830ebd849694d1ec25bf1f44582d6ac531a57a365a803a6034ff751d2d06"
       url: "https://pub.dev"
     source: hosted
-    version: "10.0.5"
+    version: "10.0.7"
   leak_tracker_flutter_testing:
     dependency: transitive
     description:
       name: leak_tracker_flutter_testing
-      sha256: "932549fb305594d82d7183ecd9fa93463e9914e1b67cacc34bc40906594a1806"
+      sha256: "9491a714cca3667b60b5c420da8217e6de0d1ba7a5ec322fab01758f6998f379"
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.5"
+    version: "3.0.8"
   leak_tracker_testing:
     dependency: transitive
     description:
@@ -703,10 +703,10 @@ packages:
     dependency: transitive
     description:
       name: macros
-      sha256: "0acaed5d6b7eab89f63350bccd82119e6c602df0f391260d0e32b5e23db79536"
+      sha256: "1d9e801cd66f7ea3663c45fc708450db1fa57f988142c64289142c9b7ee80656"
       url: "https://pub.dev"
     source: hosted
-    version: "0.1.2-main.4"
+    version: "0.1.3-main.0"
   matcher:
     dependency: transitive
     description:
@@ -967,7 +967,7 @@ packages:
     dependency: transitive
     description: flutter
     source: sdk
-    version: "0.0.99"
+    version: "0.0.0"
   source_gen:
     dependency: transitive
     description:
@@ -1360,5 +1360,5 @@ packages:
     source: path
     version: "0.0.1"
 sdks:
-  dart: ">=3.6.0-149.3.beta <4.0.0"
-  flutter: ">=3.25.0-1.0.pre.41"
+  dart: ">=3.6.0-217.0.dev <4.0.0"
+  flutter: ">=3.25.0-1.0.pre.296"

pubspec.yaml

@@ -14,8 +14,8 @@ environment:
   # We use a recent version of Flutter from its main channel, and
   # the corresponding recent version of the Dart SDK.
   # Feel free to update these regularly; see README.md for instructions.
-  sdk: '>=3.6.0-149.3.beta <4.0.0'
-  flutter: '>=3.25.0-1.0.pre.41'
+  sdk: '>=3.6.0-217.0.dev <4.0.0'
+  flutter: '>=3.25.0-1.0.pre.296'
 
 # To update dependencies, see instructions in README.md.
 dependencies:

test/widgets/compose_box_test.dart

@@ -256,7 +256,7 @@ void main() {
       final sendButtonWidget = sendButtonElement.widget as IconButton;
       final colorScheme = Theme.of(sendButtonElement).colorScheme;
       final expectedForegroundColor = expected
-        ? colorScheme.onSurface.withOpacity(0.38)
+        ? colorScheme.onSurface.withValues(alpha: 0.38)
         : colorScheme.onPrimary;
       check(sendButtonWidget.color).equals(expectedForegroundColor);
     }