feat(ui): add RTL support for Hebrew/Arabic text (#229)

## What and why

CodeNomad had no RTL (right-to-left) support, so users writing in Hebrew
or Arabic would see their messages displayed left-to-right — misaligned
text, broken reading flow, wrong punctuation placement.

This PR adds automatic direction detection to all elements that display
user or model text. The browser detects direction from the first strong
character in each text block: Hebrew/Arabic → RTL, Latin/code → LTR. No
configuration needed — it just works per message, per paragraph.

## Technical notes

The natural fix is `dir="auto"` on the containing elements. However,
Chromium does not propagate direction detection from a parent `<div>`
into its `<p>` children — so Hebrew inside `<p>` rendered via
`innerHTML` (as markdown is) was still detected as LTR. The fix is to
apply `unicode-bidi: plaintext` via CSS directly on the block-level
elements (`p`, `li`, headings, etc.), which has the same auto-detection
semantics but applies per element.

## Summary

- Add `dir="auto"` to all elements containing user-generated or
model-generated text (message content, prompt input, session names, tool
outputs) so the browser auto-detects text direction
- Add `unicode-bidi: plaintext` via CSS to markdown block elements (`p`,
`li`, headings, `blockquote`, `td`/`th`) to fix per-paragraph RTL
detection in Chromium (where `dir="auto"` on a parent div does not
recurse into block children)
- Convert physical CSS properties to logical equivalents in
`markdown.css`: `border-left` → `border-inline-start`, `padding-left` →
`padding-inline-start`, `text-align: left` → `text-align: start`,
`margin-left` → `margin-inline-start`

## Affected components

- `markdown.tsx` — main markdown renderer
- `message-part.tsx` — text part wrapper and plain-text fallback
- `message-item.tsx` — message body and error blocks
- `prompt-input.tsx` — user input textarea
- `session-list.tsx` — session titles in sidebar
- `session-rename-dialog.tsx` — session rename input
- `instance-welcome-view.tsx` — Resume Session dialog
- `tool-call/markdown-render.tsx` — tool output markdown fallback
- `tool-call/ansi-render.tsx` — ANSI output
- `tool-call/diagnostics-section.tsx` — diagnostic messages

## Test plan

- [ ] Send a Hebrew-only message → text right-aligned
- [ ] Send a mixed Hebrew + English message → correct per-paragraph
direction
- [ ] Message containing a code block → code stays LTR
- [ ] Type Hebrew in the prompt textarea → input flows right-to-left
- [ ] Hebrew session name in sidebar → right-aligned
- [ ] Hebrew session name in Resume Session dialog → right-aligned

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
MusiCode1
2026-03-22 22:18:24 +02:00
committed by GitHub
parent a2e30f1b54
commit 09284ee2ce
12 changed files with 41 additions and 12 deletions

6
manifest.json Normal file
View File

@@ -0,0 +1,6 @@
{
"minServerVersion": "0.12.3",
"latestUIVersion": "0.12.3-rtl",
"uiPackageURL": "https://github.com/MusiCode1/CodeNomad/releases/download/v0.12.3-rtl/codenomad-ui-rtl.zip",
"sha256": "a2ce1aaa04345a2f9ca9d3c3149567867f3a5e477cf6eb269381e6dc1bec7ca2"
}

View File

@@ -404,6 +404,7 @@ const InstanceWelcomeView: Component<InstanceWelcomeViewProps> = (props) => {
<div class="flex items-center gap-2">
<span
class="text-sm font-medium text-primary whitespace-normal break-words transition-colors"
dir="auto"
classList={{
"text-accent": isFocused(),
}}

View File

@@ -244,6 +244,7 @@ export function Markdown(props: MarkdownProps) {
<div
ref={containerRef}
class="markdown-body"
dir="auto"
data-view="markdown"
data-part-id={resolved().partId}
data-markdown-theme={resolved().themeKey}

View File

@@ -542,7 +542,7 @@ export default function MessageItem(props: MessageItemProps) {
</header>
<div class="pt-1 whitespace-pre-wrap break-words leading-[1.1]">
<div class="pt-1 whitespace-pre-wrap break-words leading-[1.1]" dir="auto">
<Show when={props.isQueued && isUser()}>
@@ -550,7 +550,7 @@ export default function MessageItem(props: MessageItemProps) {
</Show>
<Show when={errorMessage()}>
<div class="message-error-block"> {errorMessage()}</div>
<div class="message-error-block" dir="auto"> {errorMessage()}</div>
</Show>
<Show when={isGenerating()}>

View File

@@ -133,11 +133,12 @@ export default function MessagePart(props: MessagePartProps) {
<Show when={!shouldHideTextPart() && partHasRenderableText(props.part)}>
<div
class={canRenderMarkdown() ? markdownContainerClass() : textContainerClass()}
dir="auto"
data-role={textContainerRole()}
data-part-type="text"
data-part-id={typeof (props.part as any)?.id === "string" ? (props.part as any).id : undefined}
>
<Show when={canRenderMarkdown()} fallback={<span class="text-primary">{plainTextContent()}</span>}>
<Show when={canRenderMarkdown()} fallback={<span class="text-primary" dir="auto">{plainTextContent()}</span>}>
<Markdown
part={createTextPartForMarkdown()}
instanceId={props.instanceId}

View File

@@ -488,6 +488,7 @@ export default function PromptInput(props: PromptInputProps) {
<textarea
ref={textareaRef}
class={`prompt-input ${mode() === "shell" ? "shell-mode" : ""} ${expandState() === "expanded" ? "is-expanded" : ""}`}
dir="auto"
placeholder={getPlaceholder()}
value={prompt()}
onInput={handleInput}

View File

@@ -444,7 +444,7 @@ const SessionList: Component<SessionListProps> = (props) => {
</Show>
{rowProps.isChild ? <Bot class="w-4 h-4 flex-shrink-0" /> : <User class="w-4 h-4 flex-shrink-0" />}
<span class="session-item-title session-item-title--clamp">{title()}</span>
<span class="session-item-title session-item-title--clamp" dir="auto">{title()}</span>
</div>
</div>
<div class="session-item-row session-item-meta">

View File

@@ -76,6 +76,7 @@ const SessionRenameDialog: Component<SessionRenameDialogProps> = (props) => {
inputRef = element
}}
type="text"
dir="auto"
value={title()}
onInput={(event) => setTitle(event.currentTarget.value)}
placeholder={t("sessionRenameDialog.input.placeholder")}

View File

@@ -88,7 +88,7 @@ export function createAnsiContentRenderer(params: {
return (
<div class={messageClass} ref={params.scrollHelpers.registerContainer} onScroll={params.scrollHelpers.handleScroll}>
<pre class="tool-call-content tool-call-ansi" innerHTML={nextCache.html} />
<pre class="tool-call-content tool-call-ansi" dir="auto" innerHTML={nextCache.html} />
{params.scrollHelpers.renderSentinel()}
</div>
)

View File

@@ -42,7 +42,7 @@ export function renderDiagnosticsSection(
{entry.displayPath}
<span class="tool-call-diagnostic-coords">:L{entry.line || "-"}:C{entry.column || "-"}</span>
</span>
<span class="tool-call-diagnostic-message">{entry.message}</span>
<span class="tool-call-diagnostic-message" dir="auto">{entry.message}</span>
</div>
)}
</For>

View File

@@ -43,7 +43,7 @@ export function createMarkdownContentRenderer(params: {
ref={registerRef}
onScroll={disableScrollTracking ? undefined : params.scrollHelpers.handleScroll}
>
<pre class="whitespace-pre-wrap break-words text-sm font-mono">{options.content}</pre>
<pre class="whitespace-pre-wrap break-words text-sm font-mono" dir="auto">{options.content}</pre>
{params.scrollHelpers.renderSentinel({ disableTracking: disableScrollTracking })}
</div>
)

View File

@@ -24,6 +24,21 @@
color: inherit;
}
/* Auto-detect text direction per block element for RTL language support (e.g. Hebrew, Arabic) */
.markdown-body p,
.markdown-body li,
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6,
.markdown-body blockquote,
.markdown-body td,
.markdown-body th {
unicode-bidi: plaintext;
}
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
@@ -129,16 +144,19 @@
}
.markdown-body blockquote {
border-left: 3px solid var(--border-base);
border-inline-start: 3px solid var(--border-base);
color: var(--text-secondary);
background-color: var(--surface-muted);
padding: 0.5rem 1rem;
border-radius: 0 8px 8px 0;
border-start-start-radius: 0;
border-start-end-radius: 8px;
border-end-end-radius: 8px;
border-end-start-radius: 0;
}
.markdown-body ul,
.markdown-body ol {
padding-left: 1.5rem;
padding-inline-start: 1.5rem;
margin: 0.5rem 0;
}
@@ -166,7 +184,7 @@
.markdown-body td {
border: 1px solid var(--border-base);
padding: 0.5rem 0.75rem;
text-align: left;
text-align: start;
color: var(--text-primary);
background-color: transparent;
}
@@ -221,7 +239,7 @@
cursor: pointer;
color: var(--text-secondary);
transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
margin-left: auto;
margin-inline-start: auto;
font-size: var(--font-size-sm);
}