Render message text as markdown in the Compose UI kit - #6683
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September 8, 2026 10:53
WalkthroughThis change adds Markdown rendering for Compose messages, including styling, links, lists, quotes, code, translation handling, and RTL quote rails. The sample app adds a persisted Markdown feature toggle. Unit and snapshot tests cover rendering and integration behavior. ChangesMarkdown message rendering
Estimated code review effort: 4 (Complex) | ~60 minutes Merge Risk: 🔵 Low · up to Links and mentions can behave incorrectly inside quotes or when tapping immediately after them. The fixes are localized. Sequence Diagram(s)sequenceDiagram
participant CustomLoginActivity
participant CustomSettings
participant MessagesActivity
participant ChatTheme
participant MessageText
CustomLoginActivity->>CustomSettings: persist isMarkdownEnabled
MessagesActivity->>CustomSettings: read isMarkdownEnabled
MessagesActivity->>ChatTheme: provide markdownFormatter or defaultFormatter
ChatTheme->>MessageText: render formatted message
MessageText->>MessageTextFormatter: format message text
Suggested reviewers: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 25.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 132 functions across 18 files. (3 skipped: 3 unsupported.)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Actionable comments posted: 3
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Inline comments:
In
`@stream-chat-android-compose-sample/src/main/java/io/getstream/chat/android/compose/sample/ui/MessagesActivity.kt`:
- Around line 153-158: Add sample-level tests for
MessagesActivity.messageTextFormatter that persist
CustomSettings.isMarkdownEnabled as false and true, recreate the screen for each
value, and verify selection of MessageTextFormatter.defaultFormatter and
MessageTextFormatter.markdownFormatter respectively. Extend the existing sample
test setup without changing the formatter-selection logic.
In
`@stream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/components/messages/MessageText.kt`:
- Line 135: Update the annotation lookup in MessageText so it filters
annotations to clickable tags—AnnotationTagUrl, AnnotationTagEmail, and
AnnotationTagMention—before selecting the first match; do not allow block-quote
annotations to be passed to onLinkClick or interfere with mention handling.
- Line 135: Update the annotation lookup in the clickable text handling to use a
half-open range, changing the position check from inclusive through it.end to
exclusive of it.end. Preserve the existing URL, email, and mention handling
while ensuring the first character after an annotation is not matched.
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⛔ Files ignored due to path filters (4)
stream-chat-android-compose/src/test/snapshots/images/io.getstream.chat.android.compose.ui.util_MarkdownRtlSnapshotTest_right_to_left_content.pngis excluded by!**/*.pngstream-chat-android-compose/src/test/snapshots/images/io.getstream.chat.android.compose.ui.util_MarkdownSnapshotTest_every_supported_construct.pngis excluded by!**/*.pngstream-chat-android-compose/src/test/snapshots/images/io.getstream.chat.android.compose.ui.util_MarkdownSnapshotTest_quote_inside_a_list_item.pngis excluded by!**/*.pngstream-chat-android-compose/src/test/snapshots/images/io.getstream.chat.android.compose.ui.util_MarkdownSnapshotTest_wrapping_content.pngis excluded by!**/*.png
📒 Files selected for processing (21)
gradle/libs.versions.tomlstream-chat-android-compose-sample/src/main/java/io/getstream/chat/android/compose/sample/data/CustomSettings.ktstream-chat-android-compose-sample/src/main/java/io/getstream/chat/android/compose/sample/ui/MessagesActivity.ktstream-chat-android-compose-sample/src/main/java/io/getstream/chat/android/compose/sample/ui/login/CustomLoginActivity.ktstream-chat-android-compose-sample/src/main/res/values/strings.xmlstream-chat-android-compose/api/stream-chat-android-compose.apistream-chat-android-compose/build.gradle.ktsstream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/components/messages/MessageText.ktstream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/util/AnnotatedString.ktstream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/util/BlockQuoteRails.ktstream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/util/MarkdownMessageTextFormatter.ktstream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/util/MarkdownStyles.ktstream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/util/MessageTextFormatter.ktstream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/util/MessageUtils.ktstream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/util/TextUtils.ktstream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/util/internal/MarkdownEmitter.ktstream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/util/internal/MarkdownRenderer.ktstream-chat-android-compose/src/test/kotlin/io/getstream/chat/android/compose/ui/util/MarkdownMessageTextFormatterTest.ktstream-chat-android-compose/src/test/kotlin/io/getstream/chat/android/compose/ui/util/MarkdownRendererTest.ktstream-chat-android-compose/src/test/kotlin/io/getstream/chat/android/compose/ui/util/MarkdownRtlSnapshotTest.ktstream-chat-android-compose/src/test/kotlin/io/getstream/chat/android/compose/ui/util/MarkdownSnapshotTest.kt
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Goal
Bring the opt-in markdown rendering added to the Compose UI kit on develop (#6681) to the v6 maintenance line, so apps that stay on v6 get the feature and do not lose it by moving from the View kit to Compose.
Closes AND-1500
Implementation
The renderer, its emitter and the drawn block quote rail port across unchanged, so this is mostly the same change as #6681. What follows is only where v6 forced a different answer.
MessageTextFormatter.markdownFormatter(...)with the same four parameters as on develop, so the public surface this adds is one function.ChatTheme's default is untouched.StreamTypography/StreamColorswithdefaultTypography(),defaultColors()anddefaultDarkColors(), rather thanStreamDesign.AnnotationTagMentionand a single colour, soannotateStreamEntitiesis built on v6'smentionedUserNamesandmentionsColor.markdownFormattertherefore passes the realdefaultMentionColor, not develop'sColor.Unspecified, which v6 would render as no colour at all.textLowEmphasis, the colour v6 already gives block quote text.bordersis the nearer counterpart of develop's token but it is#DBDDE1against an#F7F7F8background, so the rail was present and invisible.Message.resolveDisplayedTextso both formatters share one implementation, as they do on develop.MessageTextagainstActivityNotFoundException, and annotate onlyhttp,https,mailtoandteldestinations.MessagesActivity.SetupChatTheme(), where messages render, since v6 has no sharedSampleChatThemeand five activities configureChatThemeseparately. Generalise the sample'sEnableAdaptiveScreenFieldinto aFeatureFlagFieldso both toggles share the switch styling.Two things on develop deliberately did not come across:
compose-markdowncatalog entry. That entry is dead on develop butstream-chat-android-ai-assistantstill uses it here.MessageTextsets no content description at all, so there is nothing to attach it to.Testing
testDebugUnitTest,verifyPaparazziDebug,apiCheck,lintDebug,detektandspotlessCheckall pass on the compose module.Not yet checked by hand on a device. The heading scale is the part worth a look, since 24sp against 14sp body is a sharper step than develop's 20 against 16.
Summary by CodeRabbit
New Features
Bug Fixes