import {
ChatAttachmentsList,
ChatFormActions,
+ ChatFormContenteditable,
ChatFormFileInputInvisible,
ChatFormMcpResourcesList,
ChatFormPickers,
} from '$lib/types';
import {
buildMentionInsertion,
+ containsCodeSpan,
+ containsFileMentionLink,
findCommandToken,
findMentionToken,
isIMEComposing,
- mentionLinkEndingAt,
+ isOffsetInCodeBlock,
parseClipboardContent,
uuid
} from '$lib/utils';
onValueChange
}: Props = $props();
+ // Component References
+ // Shared handle of the two input renderers (textarea + contenteditable).
+ type ChatInputHandle = {
+ focus(): void;
+ resetHeight(): void;
+ getElement(): HTMLElement | undefined;
+ getCaretOffset(): number;
+ setCaretOffset(offset: number): void;
+ };
+
let audioRecorder: AudioRecorder | undefined;
let chatFormActionsRef: ChatFormActions | undefined = $state(undefined);
let fileInputRef: ChatFormFileInputInvisible | undefined = $state(undefined);
let pickersRef: { handleKeydown: (event: KeyboardEvent) => boolean } | undefined =
$state(undefined);
- let inputRef: ChatFormTextarea | undefined = $state(undefined);
+ let inputRef: ChatInputHandle | undefined = $state(undefined);
+
+ // Render-mode gate: the plain textarea by default, the contenteditable
+ // while the buffer carries a `file://` mention link or a complete code
+ // span (badges and code chips need a DOM the textarea cannot provide).
+ // Demotes back once neither remains.
+ let useContenteditable = $state(false);
// Audio Recording State
let isRecording = $state(false);
);
let canSubmit = $derived(value.trim().length > 0 || hasAttachments);
+ // Caret offset restored after a renderer swap. Callers that mutate
+ // `value` themselves (e.g. the mention picker) pin the target offset
+ // BEFORE the assignment; otherwise the swap effect snapshots the
+ // current caret.
+ let pendingCaretOffset = 0;
+ let caretOffsetPinned = false;
+
+ function queueCaretRestore() {
+ queueMicrotask(() => {
+ inputRef?.focus();
+ inputRef?.setCaretOffset(pendingCaretOffset);
+ caretOffsetPinned = false;
+ });
+ }
+
+ $effect(() => {
+ const wantContenteditable =
+ containsFileMentionLink(value ?? '') || containsCodeSpan(value ?? '');
+ if (useContenteditable === wantContenteditable) return;
+
+ if (!caretOffsetPinned) {
+ pendingCaretOffset = inputRef?.getCaretOffset() ?? (value ?? '').length;
+ }
+
+ useContenteditable = wantContenteditable;
+ queueCaretRestore();
+ });
+
onMount(() => {
recordingSupported = isAudioRecordingSupported();
audioRecorder = new AudioRecorder();
return;
}
- // Backspace at a mention link's end deletes the whole token at once.
- if (event.key === KeyboardKey.BACKSPACE && !event.ctrlKey && !event.metaKey && !event.altKey) {
- const el = inputRef?.getElement();
- if (el instanceof HTMLTextAreaElement && el.selectionStart === el.selectionEnd) {
- const link = mentionLinkEndingAt(value, el.selectionStart);
- if (link) {
- event.preventDefault();
- value = value.slice(0, link.start) + value.slice(link.end);
- onValueChange?.(value);
- queueMicrotask(() => inputRef?.setCaretOffset(link.start));
- return;
- }
- }
- }
-
if (event.key === KeyboardKey.ENTER && !event.shiftKey && !isIMEComposing(event)) {
const isModifier = event.ctrlKey || event.metaKey;
const sendOnEnter = currentConfig.sendOnEnter !== false;
+ // Caret inside a fenced code block (closed, or still open
+ // while being typed): Enter adds a line, never submits. The
+ // contenteditable consumes this case locally; this gate
+ // covers the plain textarea, where skipping submit lets the
+ // native newline through.
+ if (!isModifier && isOffsetInCodeBlock(value ?? '', inputRef?.getCaretOffset() ?? 0)) {
+ return;
+ }
+
if (sendOnEnter || isModifier) {
event.preventDefault();
const built = buildMentionInsertion(entry, value, token);
if (!built) return;
+ // Pin the post-insertion caret BEFORE the swap effect runs;
+ // otherwise the effect clobbers it with the textarea's selection
+ // at promotion time (browser-dependent: usually reset to 0).
+ pendingCaretOffset = built.caretOffset;
+ caretOffsetPinned = true;
+
value = built.newValue;
onValueChange?.(built.newValue);
- // bind:value applies on the next microtask; restore the caret after.
- queueMicrotask(() => {
- inputRef?.focus();
- inputRef?.setCaretOffset(built.caretOffset);
- });
+ // Already in contenteditable mode: no renderer flip, so the swap
+ // effect's caret restore never runs.
+ if (useContenteditable) {
+ queueCaretRestore();
+ }
}
async function handleMicClick() {
<div
class="flex-column relative min-h-12 items-center rounded-4xl md:rounded-3xl py-2 pb-2.25 shadow-sm transition-all focus-within:shadow-md md:py-3!"
>
- <ChatFormTextarea
- class="px-5 py-1.5 md:pt-0"
- bind:this={inputRef}
- bind:value
- onKeydown={handleKeydown}
- onInput={() => {
- pickers.handleInput();
- onValueChange?.(value);
- }}
- onPaste={handlePaste}
- {disabled}
- {placeholder}
- />
+ {#if useContenteditable}
+ <ChatFormContenteditable
+ class="px-5 py-1.5 md:pt-0 mb-0.5"
+ bind:this={inputRef}
+ bind:value
+ onKeydown={handleKeydown}
+ onInput={() => {
+ pickers.handleInput();
+ onValueChange?.(value);
+ }}
+ onPaste={handlePaste}
+ {disabled}
+ {placeholder}
+ />
+ {:else}
+ <ChatFormTextarea
+ class="px-5 py-1.5 md:pt-0"
+ bind:this={inputRef}
+ bind:value
+ onKeydown={handleKeydown}
+ onInput={() => {
+ pickers.handleInput();
+ onValueChange?.(value);
+ }}
+ onPaste={handlePaste}
+ {disabled}
+ {placeholder}
+ />
+ {/if}
{#if mcpHasResourceAttachments()}
<ChatFormMcpResourcesList
--- /dev/null
+<script lang="ts">
+ import { onDestroy, onMount, untrack } from 'svelte';
+ import { mode } from 'mode-watcher';
+ import githubDarkCss from 'highlight.js/styles/github-dark.css?inline';
+ import githubLightCss from 'highlight.js/styles/github.css?inline';
+ import { isMobile } from '$lib/stores/viewport.svelte';
+ import { ColorMode } from '$lib/enums';
+ import { TRIM_LEADING_PADDING_REGEX, TRIM_TRAILING_PADDING_REGEX } from '$lib/constants';
+ import {
+ badgeAwareWordJump,
+ buildFragment,
+ domMatchesTokens,
+ highlightCode,
+ isIMEComposing,
+ isOffsetInCodeBlock,
+ leadingBadgeEdgeOffset,
+ rangeToTextOffset,
+ serializeContent,
+ SourceHistory,
+ stripBlockBoundaryLineBreaks,
+ syncCodeBlockHatches,
+ tokenizeContent,
+ textOffsetToRange
+ } from '$lib/utils';
+ import type { ContentToken, SourceHistoryEntry } from '$lib/utils';
+
+ interface Props {
+ class?: string;
+ disabled?: boolean;
+ onInput?: () => void;
+ onKeydown?: (event: KeyboardEvent) => void;
+ onPaste?: (event: ClipboardEvent) => void;
+ placeholder?: string;
+ value?: string;
+ }
+
+ let {
+ class: className = '',
+ disabled = false,
+ onInput,
+ onKeydown,
+ onPaste,
+ placeholder = 'Ask anything...',
+ value = $bindable('')
+ }: Props = $props();
+
+ let rootElement: HTMLDivElement | undefined = $state();
+ let lastEmittedValue = '';
+ let isComposing = $state(false);
+
+ // Undo/redo in source space: the imperative token rebuilds destroy the
+ // browser's native undo stack.
+ const history = new SourceHistory();
+
+ // Browsers disagree on what an empty contenteditable contains (`<br>`,
+ // `<div><br></div>`, or nothing), so emptiness is decided by the
+ // serialized source, not the DOM shape.
+ function syncEmptyState(serialized?: string) {
+ if (!rootElement) return;
+ const source = serialized ?? serializeContent(rootElement);
+ rootElement.dataset.empty = source.length === 0 ? 'true' : 'false';
+ }
+
+ function renderTokens(tokens: ContentToken[]) {
+ if (!rootElement) return;
+
+ const caret = rangeToTextOffset(rootElement, safeRange());
+
+ // eslint-disable-next-line svelte/no-dom-manipulating -- the token layer is owned imperatively; Svelte renders only the contenteditable host, never its children
+ rootElement.replaceChildren(buildFragment(tokens));
+
+ syncCodeBlockHatches(rootElement);
+ highlightCodeBlocks(rootElement);
+
+ restoreCaret(caret);
+ resizeHeight();
+ syncEmptyState();
+ }
+
+ // Last highlighted source segment per block element - typing inside
+ // a block re-highlights only when the segment actually changed.
+ const highlightedSegments = new WeakMap<HTMLElement, string>();
+
+ const CODE_BLOCK_OPEN_RE = /^```([^\n`]*)\n/;
+
+ /**
+ * Apply syntax highlighting to a code block element's CONTENT. The
+ * fence lines stay plain text, and the blank padding that
+ * `highlightCode` trims is re-added as plain text, so the element's
+ * textContent stays byte-exact with the source segment. Replaces
+ * the element's children - callers restore the caret afterwards.
+ * Returns false when nothing changed.
+ */
+ function highlightCodeBlockElement(el: HTMLElement): boolean {
+ const segment = el.textContent ?? '';
+ if (highlightedSegments.get(el) === segment) return false;
+
+ const open = CODE_BLOCK_OPEN_RE.exec(segment);
+ if (!open) return false;
+
+ const prefix = open[0];
+ const language = open[1].trim().split(/\s+/)[0] ?? '';
+ const content = segment.slice(prefix.length, -3);
+
+ const leading = content.match(TRIM_LEADING_PADDING_REGEX)?.[0] ?? '';
+ const trailing = content.match(TRIM_TRAILING_PADDING_REGEX)?.[0] ?? '';
+ const core = content.slice(leading.length, content.length - trailing.length);
+
+ // autoDetect off: re-guessing the language on every keystroke
+ // costs ~38ms a call and flickers while typing
+ const html = core ? highlightCode(core, language || 'text', false) : '';
+ const tpl = document.createElement('template');
+ tpl.innerHTML = html;
+
+ el.replaceChildren(
+ document.createTextNode(prefix + leading),
+ tpl.content.cloneNode(true),
+ document.createTextNode(trailing + '```')
+ );
+ highlightedSegments.set(el, segment);
+ return true;
+ }
+
+ function highlightCodeBlocks(root: HTMLElement) {
+ for (const el of root.querySelectorAll<HTMLElement>('code[data-code-token="block"]')) {
+ highlightCodeBlockElement(el);
+ }
+ }
+
+ /**
+ * Re-highlight the code block the caret sits in after an edit.
+ * Skipped when the block's segment is unchanged since its last
+ * highlight, so edits outside blocks cost nothing.
+ */
+ function rehighlightCaretCodeBlock() {
+ if (!rootElement) return;
+
+ const range = safeRange();
+ if (!range) return;
+
+ let node: Node | null = range.startContainer;
+ if (node === rootElement) {
+ node = rootElement.childNodes[range.startOffset - 1] ?? null;
+ }
+
+ while (node && node !== rootElement) {
+ if (node instanceof HTMLElement && node.dataset.codeToken === 'block') {
+ const caret = rangeToTextOffset(rootElement, range);
+ if (highlightCodeBlockElement(node)) {
+ restoreCaret(caret);
+ }
+ return;
+ }
+ node = node.parentNode;
+ }
+ }
+
+ /**
+ * Is the caret inside a fenced code block region? Source-level
+ * (not DOM-level) so the still-OPEN fence counts too: while the
+ * user is typing a block, no closing ``` exists yet and the
+ * buffer is plain text with no block element to find. Root-level
+ * caret positions right at a closed block's edge (escape
+ * hatches, element boundaries restored by `textOffsetToRange`)
+ * resolve past the closing fence, so they count as OUTSIDE.
+ */
+ function caretInCodeBlock(): boolean {
+ if (!rootElement) return false;
+
+ return isOffsetInCodeBlock(
+ serializeContent(rootElement),
+ rangeToTextOffset(rootElement, safeRange())
+ );
+ }
+
+ /**
+ * hljs theme for the highlighted code blocks. Mirrors
+ * SyntaxHighlightedCode.svelte: one shared style element
+ * (deduped via the data attribute) swapped on mode change.
+ */
+ function loadHighlightTheme(isDark: boolean) {
+ document.querySelectorAll('style[data-highlight-theme-preview]').forEach((s) => s.remove());
+
+ const style = document.createElement('style');
+ style.setAttribute('data-highlight-theme-preview', 'true');
+ style.textContent = isDark ? githubDarkCss : githubLightCss;
+
+ document.head.appendChild(style);
+ }
+
+ $effect(() => {
+ loadHighlightTheme(mode.current === ColorMode.DARK);
+ });
+
+ function safeRange(): Range | null {
+ if (!rootElement) return null;
+
+ const selection = window.getSelection();
+ if (!selection || selection.rangeCount === 0) return null;
+
+ const range = selection.getRangeAt(0);
+
+ if (!rootElement.contains(range.startContainer) || !rootElement.contains(range.endContainer)) {
+ return null;
+ }
+
+ return range;
+ }
+
+ function restoreCaret(offset: number, extend = false) {
+ if (!rootElement) return;
+
+ const target = textOffsetToRange(rootElement, offset);
+ const selection = window.getSelection();
+ if (!selection) return;
+
+ if (extend && selection.anchorNode) {
+ selection.setBaseAndExtent(
+ selection.anchorNode,
+ selection.anchorOffset,
+ target.startContainer,
+ target.startOffset
+ );
+ return;
+ }
+
+ selection.removeAllRanges();
+ selection.addRange(target);
+ }
+
+ function resizeHeight() {
+ if (!rootElement) return;
+ rootElement.style.height = 'auto';
+ rootElement.style.height = `${rootElement.scrollHeight}px`;
+ }
+
+ function recordHistory(newGroup: boolean) {
+ if (!rootElement) return;
+ history.push(
+ { value: lastEmittedValue, caret: rangeToTextOffset(rootElement, safeRange()) },
+ Date.now(),
+ newGroup
+ );
+ }
+
+ /**
+ * Re-emit the current markdown source value to the parent, then
+ * reconcile the DOM against the token stream: when a code span
+ * was just completed or broken, the token boundaries no longer
+ * match the element structure and the DOM is rebuilt (caret
+ * preserved through the source-offset mapping).
+ */
+ function processInput(inputType?: string) {
+ if (isComposing || !rootElement) return;
+
+ syncEmptyState();
+ resizeHeight();
+
+ // Shift+Enter right after a code block leaves an all-newline
+ // text node (the fence's separator line plus Chromium's
+ // artificial end-of-buffer line break). Strip both so the caret
+ // lands on the line directly below the block.
+ if (inputType === 'insertLineBreak' || inputType === 'insertParagraph') {
+ const caret = rangeToTextOffset(rootElement, safeRange());
+ if (stripBlockBoundaryLineBreaks(rootElement)) {
+ restoreCaret(caret);
+ } else {
+ const source = serializeContent(rootElement);
+ let end = caret;
+
+ // the caret must end up after the inserted \n; some browsers
+ // leave it before (stuck at the end of the old line). A
+ // preceding \n means it already sits past the break
+ // (Chromium's artificial trailing newline) - leave it.
+ if (source[end] === '\n' && source[end - 1] !== '\n') {
+ end += 1;
+ restoreCaret(end);
+ }
+
+ // a line break at the buffer end renders only with a second,
+ // artificial trailing \n: a lone trailing \n is collapsed, so
+ // the new line is invisible and the next typed character
+ // consumes it. Append it when missing - unless the trailing
+ // \n doubles as a block's separator line (source ends with
+ // \n\n) or sits inside a block element.
+ let last = rootElement.lastChild;
+ while (last && last.nodeName === 'BR') last = last.previousSibling;
+ if (
+ end === source.length &&
+ source.endsWith('\n') &&
+ source[source.length - 2] !== '\n' &&
+ last?.nodeType === Node.TEXT_NODE
+ ) {
+ // eslint-disable-next-line svelte/no-dom-manipulating -- the token layer is owned imperatively; Svelte renders only the contenteditable host, never its children
+ rootElement.appendChild(document.createTextNode('\n'));
+ restoreCaret(source.length);
+ resizeHeight();
+ }
+ }
+ }
+
+ syncCodeBlockHatches(rootElement);
+
+ const serialized = serializeContent(rootElement);
+ syncEmptyState(serialized);
+ if (serialized === lastEmittedValue) return;
+
+ // Plain typing/deletes coalesce per time window; structural edits
+ // (paste, newline, cut, autocorrect) start a new undo group.
+ recordHistory(inputType !== 'insertText' && !inputType?.startsWith('deleteContent'));
+
+ lastEmittedValue = serialized;
+ value = serialized;
+
+ // Rebuild when token boundaries shifted (a code span was just
+ // completed or broken) - the browser-owned text nodes cannot
+ // restyle themselves across element boundaries.
+ const tokens = tokenizeContent(serialized);
+ if (!domMatchesTokens(rootElement, tokens)) {
+ renderTokens(tokens);
+
+ // The rebuild can re-shape the DOM in a way that changes the
+ // serialization (e.g. Chromium merged trailing text into the
+ // block element and the rebuild splits it back out, which
+ // synthesizes the separator newline) - keep value in sync.
+ const reserialized = serializeContent(rootElement);
+ if (reserialized !== serialized) {
+ lastEmittedValue = reserialized;
+ value = reserialized;
+ }
+ } else {
+ rehighlightCaretCodeBlock();
+ }
+
+ onInput?.();
+ }
+
+ function handleInput(event: Event) {
+ processInput((event as InputEvent).inputType);
+ }
+
+ function handleCompositionStart() {
+ isComposing = true;
+ }
+
+ function handleCompositionEnd() {
+ isComposing = false;
+ processInput();
+ }
+
+ /**
+ * Insert a line break at the caret MANUALLY. Native Shift+Enter at
+ * the buffer end varies across browsers (a lone trailing \n that the
+ * renderer collapses, or a <br> that the hatch sync strips), which
+ * can leave the caret stuck on the old line; splitting the text node
+ * ourselves keeps the DOM shape - and the caret - deterministic.
+ * `processInput` then appends the artificial trailing \n when the
+ * break lands at the buffer end.
+ */
+ function insertLineBreak() {
+ if (!rootElement) return;
+
+ const range = safeRange();
+ if (!range) return;
+
+ if (!range.collapsed) {
+ range.deleteContents();
+ }
+
+ const container = range.startContainer;
+ const offset = range.startOffset;
+ const nl = document.createTextNode('\n');
+
+ // a break at the very end of a code block exits the block (the
+ // new line belongs below it, not inside)
+ let exitBlock: HTMLElement | null = null;
+ if (container.nodeType === Node.TEXT_NODE) {
+ let node: Node | null = container.parentNode;
+ while (node && node !== rootElement) {
+ if (node instanceof HTMLElement && node.dataset.codeToken === 'block') {
+ const tail = document.createRange();
+ tail.setStart(container, offset);
+ tail.setEnd(node, node.childNodes.length);
+ if (tail.toString().length === 0) exitBlock = node;
+ break;
+ }
+ node = node.parentNode;
+ }
+ }
+
+ if (exitBlock) {
+ exitBlock.after(nl);
+ } else if (container.nodeType === Node.TEXT_NODE) {
+ const text = container as Text;
+ if (offset === 0) {
+ text.before(nl);
+ } else if (offset === text.length) {
+ text.after(nl);
+ } else {
+ text.splitText(offset).before(nl);
+ }
+ } else {
+ container.insertBefore(nl, container.childNodes[offset] ?? null);
+ }
+
+ const selection = window.getSelection();
+ const after = document.createRange();
+ after.setStartAfter(nl);
+ after.collapse(true);
+ selection?.removeAllRanges();
+ selection?.addRange(after);
+
+ processInput('insertLineBreak');
+ }
+
+ /**
+ * Arrow escape to the line BEFORE a leading code block. Native
+ * caret movement has no position above a buffer-starting block,
+ * so a transient `<br>` hatch is created on demand: it gives the
+ * caret a visible line, is consumed by the first character typed
+ * on it, and is removed again when the caret leaves (see
+ * handleSelectionChange). Returns true when the caret was moved.
+ */
+ function moveCaretBeforeLeadingCodeBlock(key: string, extend: boolean): boolean {
+ if (!rootElement) return false;
+
+ // a hatch already exists - native movement handles it
+ if (rootElement.firstChild?.nodeName === 'BR') return false;
+
+ const first = rootElement.firstChild;
+ if (!(first instanceof HTMLElement) || first.dataset.codeToken !== 'block') return false;
+
+ const range = safeRange();
+ if (!range || !range.collapsed) return false;
+
+ // the caret must sit inside the block: on its very first
+ // character for ArrowLeft, anywhere on its first line for
+ // ArrowUp
+ if (!first.contains(range.startContainer)) return false;
+
+ const caret = rangeToTextOffset(rootElement, range);
+ if (key === 'ArrowLeft') {
+ if (caret !== 0) return false;
+ } else {
+ const firstLineEnd = (first.textContent ?? '').indexOf('\n');
+ if (firstLineEnd !== -1 && caret > firstLineEnd) return false;
+ }
+
+ // eslint-disable-next-line svelte/no-dom-manipulating -- the token layer is owned imperatively; Svelte renders only the contenteditable host, never its children
+ rootElement.prepend(document.createElement('br'));
+ restoreCaret(0, extend);
+ return true;
+ }
+
+ /**
+ * Remove the transient leading hatch once the caret leaves it.
+ * The hatch only exists to give the caret a line above a leading
+ * code block; with the caret anywhere else the empty line would
+ * just be visual noise. Typing on the hatch line consumes it via
+ * the stale-hatch removal in `syncCodeBlockHatches` instead (the
+ * new text node takes its place before the block).
+ */
+ function handleSelectionChange() {
+ if (!rootElement) return;
+
+ const first = rootElement.firstChild;
+ if (first?.nodeName !== 'BR') return;
+
+ const second = first.nextSibling;
+ if (!(second instanceof HTMLElement) || second.dataset.codeToken !== 'block') return;
+
+ const range = safeRange();
+ const onHatch =
+ range !== null && range.startContainer === rootElement && range.startOffset === 0;
+ if (!onHatch) {
+ first.remove();
+ }
+ }
+
+ /**
+ * Undo/redo is replayed from source snapshots (the token rebuilds
+ * destroy the native undo stack). Arrow keys around badges are
+ * repaired locally: a badge is a non-editable island, so plain
+ * ArrowLeft after a leading badge has no native previous position
+ * and word jumps overshoot it by a word.
+ *
+ * Plain Enter inside a fenced code block (closed, or still open
+ * while being typed) acts as Shift+Enter and adds a line instead of
+ * submitting. ArrowLeft/ArrowUp at the edge of a leading code block
+ * create the transient before-block hatch.
+ */
+ function handleKeydown(event: KeyboardEvent) {
+ const mod = event.ctrlKey || event.metaKey;
+ if (mod && !event.altKey && !isComposing && rootElement) {
+ const key = event.key.toLowerCase();
+ const isUndo = key === 'z' && !event.shiftKey;
+ const isRedo = key === 'y' || (key === 'z' && event.shiftKey);
+
+ if (isUndo || isRedo) {
+ event.preventDefault();
+ const current = {
+ value: lastEmittedValue,
+ caret: rangeToTextOffset(rootElement, safeRange())
+ };
+ const entry = isUndo ? history.undo(current) : history.redo(current);
+ if (entry) applyHistoryEntry(entry);
+ return;
+ }
+ }
+
+ if (
+ event.key === 'Enter' &&
+ event.shiftKey &&
+ !event.ctrlKey &&
+ !event.metaKey &&
+ !event.altKey &&
+ !isIMEComposing(event) &&
+ !disabled &&
+ !caretInCodeBlock() &&
+ safeRange()
+ ) {
+ // Own the break outside code blocks: native end-of-buffer
+ // behavior varies across browsers and can leave the caret
+ // stuck on the old line (see insertLineBreak).
+ event.preventDefault();
+ insertLineBreak();
+ return;
+ }
+
+ if (
+ event.key === 'Enter' &&
+ !event.shiftKey &&
+ !event.ctrlKey &&
+ !event.metaKey &&
+ !event.altKey &&
+ !isIMEComposing(event) &&
+ caretInCodeBlock()
+ ) {
+ // The native plain-Enter path must never run: it splits the
+ // buffer into `<div>` wrappers that `serializeContent` cannot
+ // see. `insertLineBreak` reproduces the Shift+Enter DOM (a `\n`
+ // text node) and fires `input` synchronously, so the usual
+ // re-tokenize/re-highlight follows.
+ event.preventDefault();
+ document.execCommand('insertLineBreak');
+ return;
+ }
+
+ if (
+ rootElement &&
+ (event.key === 'ArrowLeft' || event.key === 'ArrowUp') &&
+ !event.altKey &&
+ !event.ctrlKey &&
+ !event.metaKey
+ ) {
+ if (moveCaretBeforeLeadingCodeBlock(event.key, event.shiftKey)) {
+ event.preventDefault();
+ return;
+ }
+ }
+
+ if (rootElement && (event.key === 'ArrowLeft' || event.key === 'ArrowRight')) {
+ const isWordJump = (event.altKey || event.ctrlKey) && !event.metaKey;
+ const isPlainLeft =
+ event.key === 'ArrowLeft' && !event.altKey && !event.ctrlKey && !event.metaKey;
+
+ if (isWordJump || isPlainLeft) {
+ const source = serializeContent(rootElement);
+ const caret = rangeToTextOffset(rootElement, safeRange());
+ const target = isWordJump
+ ? badgeAwareWordJump(source, caret, event.key === 'ArrowRight' ? 'forward' : 'backward')
+ : leadingBadgeEdgeOffset(source, caret);
+
+ if (target !== null) {
+ event.preventDefault();
+ restoreCaret(target, event.shiftKey);
+ return;
+ }
+ }
+ }
+
+ onKeydown?.(event);
+ }
+
+ // lastEmittedValue is set before `value` so the sync effect treats the
+ // change as our own and does not re-render.
+ function applyHistoryEntry(entry: SourceHistoryEntry) {
+ if (!rootElement) return;
+ renderTokens(tokenizeContent(entry.value));
+ lastEmittedValue = entry.value;
+ value = entry.value;
+ onInput?.();
+ restoreCaret(entry.caret);
+ }
+
+ /**
+ * Plain-text paste. preventDefault + manual insertText keeps the
+ * browser from producing stray `<div>` wrappers mid-paste; insertText
+ * fires `input` synchronously, so `processInput` re-tokenizes the
+ * buffer and rebuilds when the pasted text carries badge or code
+ * tokens.
+ */
+ function handlePasteEvent(event: ClipboardEvent) {
+ const pasted = event.clipboardData?.getData('text/plain');
+ if (pasted && pasted.length > 0) {
+ event.preventDefault();
+
+ // Snap a collapsed caret through the offset mapping first: at
+ // element-boundary carets (e.g. right before a badge) Chromium's
+ // insertText can drop the preceding text node's trailing whitespace.
+ const range = safeRange();
+ if (rootElement && range && range.collapsed) {
+ restoreCaret(rangeToTextOffset(rootElement, range));
+ }
+
+ document.execCommand('insertText', false, pasted);
+ }
+ }
+
+ // The parent's paste handler runs first and preventDefaults when it
+ // consumes the event (files, quoted prompts, long text).
+ function handlePaste(event: ClipboardEvent) {
+ onPaste?.(event);
+ if (!event.defaultPrevented) {
+ handlePasteEvent(event);
+ }
+ }
+
+ // The selection as markdown SOURCE (each badge contributes its full
+ // `[name](file://...)` link), so copy/cut carry raw markdown and
+ // pasting back re-renders the badges. Null for collapsed/outside
+ // selections - native clipboard behavior is fine there.
+ function selectionSourceSlice(): { text: string; range: Range } | null {
+ if (!rootElement) return null;
+
+ const range = safeRange();
+ if (!range || range.collapsed) return null;
+
+ const startRange = range.cloneRange();
+ startRange.collapse(true);
+
+ const source = serializeContent(rootElement);
+ const start = rangeToTextOffset(rootElement, startRange);
+ const end = rangeToTextOffset(rootElement, range);
+
+ return { text: source.slice(start, end), range };
+ }
+
+ function handleCopy(event: ClipboardEvent) {
+ const slice = selectionSourceSlice();
+ if (!slice) return;
+
+ event.clipboardData?.setData('text/plain', slice.text);
+ event.preventDefault();
+ }
+
+ function handleCut(event: ClipboardEvent) {
+ const slice = selectionSourceSlice();
+ if (!slice) return;
+
+ event.clipboardData?.setData('text/plain', slice.text);
+ event.preventDefault();
+
+ // preventDefault suppresses the native deletion, so remove the
+ // selection manually and re-emit.
+ slice.range.deleteContents();
+ processInput('deleteByCut');
+ }
+
+ onMount(() => {
+ // untrack: the DOM is managed manually from input events, so the
+ // initial render must not subscribe to the value.
+ renderTokens(tokenizeContent(untrack(() => value)));
+ lastEmittedValue = untrack(() => value ?? '');
+ resizeHeight();
+ syncEmptyState();
+ document.addEventListener('selectionchange', handleSelectionChange);
+ if (!isMobile.current) {
+ rootElement?.focus({ preventScroll: true });
+ }
+ });
+
+ onDestroy(() => {
+ document.removeEventListener('selectionchange', handleSelectionChange);
+ });
+
+ // External `value` updates. When incoming === lastEmittedValue the
+ // change came from our own input, so leave the DOM alone - the
+ // browser already owns the right shape.
+ $effect(() => {
+ const incoming = value ?? '';
+ if (incoming === lastEmittedValue) return;
+
+ recordHistory(true); // external edit (mention insert, clear, ...): own undo step
+ renderTokens(tokenizeContent(incoming));
+ lastEmittedValue = incoming;
+ });
+
+ export function getElement() {
+ return rootElement;
+ }
+
+ export function getCaretOffset(): number {
+ if (!rootElement) return 0;
+ return rangeToTextOffset(rootElement, safeRange());
+ }
+
+ // Focus first: `selection.addRange` requires it on some browsers.
+ export function setCaretOffset(offset: number) {
+ if (rootElement && rootElement !== document.activeElement) {
+ rootElement.focus({ preventScroll: true });
+ }
+ restoreCaret(offset);
+ }
+
+ export function focus() {
+ if (isMobile.current) return;
+ rootElement?.focus({ preventScroll: true });
+ }
+
+ export function resetHeight() {
+ if (rootElement) {
+ rootElement.style.height = '';
+ resizeHeight();
+ }
+ }
+</script>
+
+<div class="flex-1 {className}">
+ <div
+ bind:this={rootElement}
+ contenteditable={!disabled}
+ role="textbox"
+ aria-multiline="true"
+ aria-disabled={disabled}
+ aria-placeholder={placeholder}
+ data-placeholder={placeholder}
+ tabindex={disabled ? -1 : 0}
+ class={[
+ 'chat-form-contenteditable text-md min-h-12 w-full whitespace-pre-wrap wrap-break-word border-0 bg-transparent p-0 leading-6 outline-none focus-visible:ring-0 focus-visible:ring-offset-0',
+ disabled && 'cursor-not-allowed'
+ ]}
+ style="max-height: var(--max-message-height);"
+ oncompositionstart={handleCompositionStart}
+ oncompositionend={handleCompositionEnd}
+ oninput={handleInput}
+ onkeydown={handleKeydown}
+ onpaste={handlePaste}
+ oncopy={handleCopy}
+ oncut={handleCut}
+ ></div>
+</div>
+
+<style>
+ /* pre-wrap is load-bearing: without it Chromium collapses \n in
+ text nodes and converts them to spaces while typing */
+ .chat-form-contenteditable {
+ white-space: pre-wrap;
+ }
+
+ .chat-form-contenteditable:global([data-empty='true'])::before {
+ content: attr(data-placeholder);
+ color: var(--muted-foreground);
+ pointer-events: none;
+ }
+
+ /* Inline code - mirrors markdown-content.css */
+ .chat-form-contenteditable :global(code[data-code-token='inline']) {
+ background: var(--muted);
+ color: var(--muted-foreground);
+ padding: 0.125rem 0.375rem;
+ border-radius: 0.375rem;
+ font-size: 0.875rem;
+ }
+
+ /* Fenced code block - mirrors .code-block-wrapper in markdown-content.css */
+ .chat-form-contenteditable :global(code[data-code-token='block']) {
+ display: block;
+ margin: 0.25rem 0;
+ padding: 0.75rem 1rem;
+ border: 1px solid color-mix(in oklch, var(--border) 30%, transparent);
+ border-radius: 0.75rem;
+ background: var(--code-background);
+ color: var(--code-foreground);
+ font-size: 0.875rem;
+ line-height: 1.3;
+ }
+</style>
import { File, Folder } from '@lucide/svelte';
import { abbreviateHome, runGlobSearchWithChildren, type GlobEntryResult } from '$lib/utils';
import { toolsStore } from '$lib/stores/tools.svelte';
- import { BuiltInTool, FileMentionEntryType, GlobSearchType } from '$lib/enums';
+ import { BuiltInTool, FileMentionEntryType, GlobSearchType, KeyboardKey } from '$lib/enums';
import { isMobile } from '$lib/stores/viewport.svelte';
import { config } from '$lib/stores/settings.svelte';
import * as Popover from '$lib/components/ui/popover';
}
export function handleKeydown(event: KeyboardEvent): boolean {
+ // Always consume Enter while the picker is open - even with no
+ // result yet (skeletons) or no matches - so the chat form's
+ // Enter-to-submit never fires mid-search.
+ if (isOpen && event.key === KeyboardKey.ENTER) {
+ event.preventDefault();
+ if (nav.hoveredIndex >= 0 && displayedItems[nav.hoveredIndex]) {
+ handleSelect(displayedItems[nav.hoveredIndex]);
+ }
+ return true;
+ }
+
return nav.handleKeydown(event);
}
</script>
}
}
- // Plain-text caret offsets for the picker/paste/mention-splice flows.
+ // Plain-text caret offsets, shared with the contenteditable variant so
+ // the picker/paste flows can address either renderer through one handle.
export function getCaretOffset(): number {
if (!textareaElement) return 0;
return textareaElement.selectionStart ?? textareaElement.value.length;
* Used by ChatScreenForm and ChatMessageEditForm for both new conversations and message editing.
*
* **Architecture:**
- * - Composes ChatFormTextarea, ChatFormActions, and ChatFormPickerMcpPrompts
+ * - Composes ChatFormTextarea (or ChatFormContenteditable for messages with
+ * file mention links), ChatFormActions, and ChatFormPickerMcpPrompts
* - Manages file upload state via `uploadedFiles` bindable prop
* - Integrates with ModelsSelectorDropdown for model selection in router mode
* - Communicates with parent via callbacks (onSubmit, onFilesAdd, onStop, etc.)
export { default as ChatFormMcpResourcesList } from './ChatForm/ChatFormMcpResourcesList.svelte';
/**
- * Auto-resizing textarea with IME composition support. Mention links stay
- * plain markdown text in the input; the chip rendering happens in the
- * message view via the rehype file-badge plugin.
+ * Auto-resizing contenteditable input that renders `[name](file://...)`
+ * mention links as inline chips while keeping the value as the markdown
+ * source string. ChatForm swaps it in once a mention link lands in the
+ * buffer. Shares the focus()/resetHeight()/caret handle with the textarea.
+ */
+export { default as ChatFormContenteditable } from './ChatForm/ChatFormContenteditable.svelte';
+
+/**
+ * Plain auto-resizing textarea with IME composition support. Default input
+ * renderer inside ChatForm until a file mention lands.
*/
export { default as ChatFormTextarea } from './ChatForm/ChatFormTextarea.svelte';
preprocessLaTeX,
getImageErrorFallbackHtml,
copyCodeToClipboard,
- copyToClipboard
+ copyToClipboard,
+ splitGluedClosingCodeFences
} from '$lib/utils';
import {
IMAGE_NOT_ERROR_BOUND_SELECTOR,
* Incomplete code blocks are rendered using SyntaxHighlightedCode to maintain interactivity.
* @param markdown - The raw markdown string to process
*/
- async function processMarkdown(markdown: string) {
+ async function processMarkdown(rawMarkdown: string) {
+ // Text glued to a closing code fence is not a fence to the parser -
+ // the block would swallow it. Split it onto its own line first.
+ const markdown = splitGluedClosingCodeFences(rawMarkdown);
+
// Early exit if content unchanged (can happen with rapid coalescing)
if (markdown === previousContent) {
return;
/* Code blocks */
.markdown-content :global(.code-block-wrapper) {
- margin: 1.5rem 0;
border-radius: 0.75rem;
overflow: hidden;
border: 1px solid color-mix(in oklch, var(--border) 30%, transparent);
max-height: var(--max-message-height);
}
+.markdown-content .markdown-block:not(:first-child) :global(.code-block-wrapper) {
+ margin-top: 1rem;
+}
+
+.markdown-content .markdown-block:not(:last-child) :global(.code-block-wrapper) {
+ margin-bottom: 1rem;
+}
+
.markdown-content:global(.dark) :global(.code-block-wrapper) {
border-color: color-mix(in oklch, var(--border) 20%, transparent);
}
/**
* Rehype plugin that rewrites `file://` markdown anchors into the inline
- * @-mention chip, reusing the visual contract from
- * `$lib/constants/mention-badge`.
+ * mention chip, sharing the class string with the contenteditable
+ * tokenizer via `$lib/constants/mention-badge`.
*
* The chip is presentational: `file://` navigation is blocked from
* http(s) pages, so the anchor becomes a plain `<span>` (no link role,
export const CHAT_FORM_POPOVER_MAX_HEIGHT = 'max-h-80';
export const DIALOG_SUBMENU_CONTENT = 'w-60';
-/** Selects the chat-form input to restore focus after model actions. */
-export const CHAT_INPUT_FOCUS_SELECTOR = '[data-slot="input-area"] textarea';
+/** Selects the focused chat-form input (either renderer) to restore focus after model actions. */
+export const CHAT_INPUT_FOCUS_SELECTOR =
+ '[data-slot="input-area"] textarea, [data-slot="input-area"] [contenteditable="true"]';
/** Default Tailwind size class for inline icon components (lucide, etc.). */
export const ICON_CLASS_DEFAULT = 'h-4 w-4';
/**
- * Visual contract for message @-mention badges. Svelte cannot be mounted
- * from a hast tree, so the rehype file-badge plugin emits the shared class
- * string below; keeping it here as a literal lets Tailwind's source
- * scanner generate the utility classes.
+ * Shared visual contract between the two DOM-only badge paths (the
+ * contenteditable tokenizer + the rehype plugin). Svelte cannot be
+ * mounted at the per-keystroke tokenizer hot path nor from a hast tree,
+ * so both emit the badge with the same class string literal; Tailwind's
+ * scanner picks it up in both sources.
*/
export const MENTION_BADGE_CLASSNAME =
'inline-flex w-fit shrink-0 items-center gap-1 whitespace-nowrap rounded-md border border-border/50 bg-foreground/5 px-1.5 py-0.5 text-xs font-mono text-foreground hover:bg-foreground/10 dark:bg-foreground/10 dark:text-secondary-foreground';
export const MENTION_BADGE_ICON_CLASSNAME = 'h-3 w-3 shrink-0';
/**
- * SVG attributes shared by the hast-built badge icons; the rehype plugin
- * spreads them onto the `<svg>` `properties`.
+ * SVG attributes shared by the DOM-built and hast-built badge icons.
+ * The tokenizer applies them via `setAttribute`, the rehype plugin
+ * spreads them onto the hast `<svg>` `properties`; string values are
+ * valid for both.
*/
export const MENTION_BADGE_SVG_ATTRIBUTES: Readonly<Record<string, string>> = {
xmlns: 'http://www.w3.org/2000/svg',
ARROW_DOWN = 'ArrowDown',
ARROW_LEFT = 'ArrowLeft',
ARROW_RIGHT = 'ArrowRight',
- BACKSPACE = 'Backspace',
TAB = 'Tab',
B_LOWER = 'b',
D_LOWER = 'd',
openingIndex: number;
}
+// A fence line: up to 3 leading spaces (CommonMark), 3+ backticks, then
+// whatever trails on the same line.
+const FENCE_LINE_REGEX = /^ {0,3}(`{3,})(.*)$/;
+
+/**
+ * Splits text glued to a closing code fence onto its own line:
+ *
+ * ```ts
+ * let foo = 'bar';
+ * ```create this file on ...
+ *
+ * A closing fence with trailing text is not a fence to the markdown
+ * parser, so the block would swallow the text as code. The chat form
+ * normally keeps the fence on its own line, but older messages and
+ * hand-pasted content can carry the glued form.
+ *
+ * Only trailing text containing whitespace is split: a single word
+ * after the backticks inside a fenced block is more likely nested
+ * markdown (a ```python example inside a ```md block) than glued prose.
+ */
+export function splitGluedClosingCodeFences(markdown: string): string {
+ if (!markdown.includes('```')) return markdown;
+
+ const lines = markdown.split(NEWLINE);
+ let inside = false;
+ let changed = false;
+
+ for (let i = 0; i < lines.length; i++) {
+ const match = FENCE_LINE_REGEX.exec(lines[i]);
+ if (!match) continue;
+
+ if (!inside) {
+ inside = true;
+ continue;
+ }
+
+ inside = false;
+
+ const trailing = match[2];
+ if (trailing.includes('`') || !/\s/.test(trailing)) continue;
+
+ lines[i] = lines[i].slice(0, lines[i].length - trailing.length);
+ lines.splice(i + 1, 0, trailing.trim());
+ i++;
+ changed = true;
+ }
+
+ return changed ? lines.join(NEWLINE) : markdown;
+}
+
/**
* Strips empty lines (whitespace-only) from the start and end of code.
*
--- /dev/null
+/**
+ * Maps between the chat-form contenteditable's markdown source and the
+ * badge/code/text token stream the DOM is built from. A badge is one
+ * opaque source contribution (`[name](file://path)`); its own subtree
+ * is never walked, and the caret cannot land inside it, so offsets
+ * resolve to the nearest badge edge. Code spans (`<code data-code-token>`)
+ * are EDITABLE, unlike badges: they carry the full source segment
+ * (backtick fences included) as their text, so their textContent
+ * serializes verbatim and source offsets map 1:1 to text offsets.
+ *
+ * The tokenizer emits a flat DOM (text nodes + badges + code spans),
+ * but browsers restructure it on Enter (`<div>` line wrappers, `<br>`
+ * shapes). Serialization folds those back into `\n` so the source
+ * never diverges from what is on screen; both offset mappers
+ * understand the same shapes.
+ *
+ * The newline separating a fenced block from adjacent content is a
+ * SOURCE-level concept, never stored in the DOM: the block is
+ * display:block, so a leading `\n` in the following text node would
+ * render as a phantom empty line. Serialization synthesizes exactly
+ * one `\n` at every block boundary and `buildFragment` strips it from
+ * text tokens. A text node's own leading/trailing `\n` next to a
+ * block is an ADDITIONAL blank line.
+ */
+
+import {
+ decodeFileLinkPath,
+ fileMentionLinkRe,
+ getMentionBadgeIconPaths,
+ getMentionBadgeLabel
+} from './mention-badge';
+import {
+ MENTION_BADGE_CLASSNAME,
+ MENTION_BADGE_ICON_CLASSNAME,
+ MENTION_BADGE_SVG_ATTRIBUTES,
+ SETTINGS_KEYS
+} from '$lib/constants';
+import { settingsStore } from '$lib/stores/settings.svelte';
+import { toolsStore } from '$lib/stores/tools.svelte';
+
+export type ContentToken =
+ | { kind: 'text'; text: string }
+ | { kind: 'badge'; name: string; path: string }
+ | { kind: 'inlineCode'; text: string }
+ | { kind: 'codeBlock'; text: string };
+
+// Block wrappers browsers insert for newlines; each folds back into a
+// single `\n` during serialization.
+const BLOCK_TAG_NAMES = new Set(['DIV', 'P']);
+
+// `file://` is required so plain URLs stay as text; `)` terminates only
+// when not followed by whitespace or `[` (adjacent badges keep working).
+const MENTION_BADGE_RE = fileMentionLinkRe('g');
+
+function badgeSourceLength(name: string, path: string): number {
+ if (!name || !path) return 0;
+ return `[${name}](file://${path})`.length;
+}
+
+/**
+ * Recognize complete code spans. Fenced blocks (triple backticks,
+ * optional language, possibly multiline) take priority over inline
+ * spans (single backticks, single line, non-empty). Only CLOSED
+ * spans match: an unclosed fence stays plain text until the closing
+ * backticks land. The match includes the fences so the token's
+ * source length equals its rendered text length.
+ */
+const CODE_SPAN_RE = /(```[\s\S]*?```)|(`[^`\n]+`)/g;
+
+/**
+ * Cheap gate check for `ChatForm`: does the buffer contain a
+ * complete code span (inline or fenced)? Used to promote the plain
+ * textarea to the contenteditable renderer.
+ */
+export function containsCodeSpan(value: string): boolean {
+ CODE_SPAN_RE.lastIndex = 0;
+ return CODE_SPAN_RE.test(value);
+}
+
+const CODE_FENCE_RE = /```/g;
+
+/**
+ * Is `offset` inside a fenced code block region? Toggle-based: an
+ * odd number of ``` fences before the offset means the position
+ * sits in block content. Unlike `containsCodeSpan` this also
+ * counts the still-OPEN fence while the user is typing a block
+ * (no closing ``` yet), so Enter can add a line instead of
+ * submitting the message.
+ */
+export function isOffsetInCodeBlock(source: string, offset: number): boolean {
+ let inside = false;
+ CODE_FENCE_RE.lastIndex = 0;
+
+ let match: RegExpExecArray | null;
+ while ((match = CODE_FENCE_RE.exec(source)) !== null) {
+ if (match.index + match[0].length > offset) break;
+ inside = !inside;
+ }
+
+ return inside;
+}
+
+/**
+ * Tokenize a markdown source value into the segments the
+ * contenteditable will render. Code spans are carved out first
+ * (their content is literal - a `file://` link inside backticks
+ * must NOT render as a badge), then plain text and badges
+ * interleave in the remaining gaps. Any whitespace after a badge
+ * stays in a plain text token so the round trip is byte-exact.
+ */
+export function tokenizeContent(input: string): ContentToken[] {
+ const tokens: ContentToken[] = [];
+ let cursor = 0;
+ CODE_SPAN_RE.lastIndex = 0;
+
+ let match: RegExpExecArray | null;
+ while ((match = CODE_SPAN_RE.exec(input)) !== null) {
+ const start = match.index;
+
+ if (start > cursor) {
+ pushTextAndBadgeTokens(input.slice(cursor, start), tokens);
+ }
+
+ tokens.push(
+ match[1] !== undefined
+ ? { kind: 'codeBlock', text: match[1] }
+ : { kind: 'inlineCode', text: match[2] }
+ );
+ cursor = start + match[0].length;
+ }
+
+ if (cursor < input.length) {
+ pushTextAndBadgeTokens(input.slice(cursor), tokens);
+ }
+
+ return tokens;
+}
+
+/**
+ * Tokenize a code-free segment into text and badge tokens.
+ */
+function pushTextAndBadgeTokens(input: string, tokens: ContentToken[]) {
+ let cursor = 0;
+ MENTION_BADGE_RE.lastIndex = 0;
+
+ let match: RegExpExecArray | null;
+ while ((match = MENTION_BADGE_RE.exec(input)) !== null) {
+ const [whole, name, path] = match;
+ const start = match.index;
+
+ if (start > cursor) {
+ tokens.push({ kind: 'text', text: input.slice(cursor, start) });
+ }
+
+ tokens.push({ kind: 'badge', name, path });
+ cursor = start + whole.length;
+ }
+
+ if (cursor < input.length) {
+ tokens.push({ kind: 'text', text: input.slice(cursor) });
+ }
+}
+
+function isCodeBlockElement(node: Node | null): node is HTMLElement {
+ return node instanceof HTMLElement && node.dataset.codeToken === 'block';
+}
+
+/**
+ * Serialize a contenteditable subtree back to source. `<br>` and block
+ * wrappers the browser inserted for newlines fold back into `\n` (a
+ * trailing `<br>` is the browser's caret placeholder, not a newline);
+ * any other element is transparent. Code spans serialize their
+ * textContent verbatim (fences included). One separator `\n` is
+ * synthesized at every fenced-block boundary (the DOM never stores
+ * it), and a `<br>` adjacent to a code block is an escape hatch, not
+ * a newline.
+ */
+export function serializeContent(root: HTMLElement): string {
+ let out = '';
+ let pendingBlockBoundary = false;
+
+ const walk = (parent: Node) => {
+ let first = true; // no source-contributing sibling seen yet
+
+ for (const child of Array.from(parent.childNodes)) {
+ if (child.nodeType === Node.TEXT_NODE) {
+ const text = child.textContent ?? '';
+ if (text.length > 0) {
+ if (pendingBlockBoundary) {
+ out += '\n';
+ pendingBlockBoundary = false;
+ }
+ out += text;
+ first = false;
+ }
+ continue;
+ }
+
+ if (child.nodeType !== Node.ELEMENT_NODE) continue;
+
+ const el = child as HTMLElement;
+
+ if (el.dataset.mentionBadge === 'true') {
+ const name = el.dataset.mentionName ?? '';
+ const path = el.dataset.mentionPath ?? '';
+ if (name && path) {
+ if (pendingBlockBoundary) {
+ out += '\n';
+ pendingBlockBoundary = false;
+ }
+ out += `[${name}](file://${path})`;
+ first = false;
+ }
+ continue;
+ }
+
+ if (el.dataset.codeToken !== undefined) {
+ const isBlock = el.dataset.codeToken === 'block';
+ if (isBlock && (pendingBlockBoundary || !first)) out += '\n';
+ pendingBlockBoundary = false;
+ walk(el);
+ first = false;
+ if (isBlock) pendingBlockBoundary = true;
+ continue;
+ }
+
+ if (el.tagName === 'BR') {
+ const isHatch =
+ isCodeBlockElement(el.previousSibling) || isCodeBlockElement(el.nextSibling);
+ if (!isHatch && el.nextSibling) {
+ if (pendingBlockBoundary) {
+ out += '\n';
+ pendingBlockBoundary = false;
+ }
+ out += '\n';
+ first = false;
+ }
+ continue;
+ }
+
+ if (BLOCK_TAG_NAMES.has(el.tagName)) {
+ if (pendingBlockBoundary || !first) out += '\n';
+ pendingBlockBoundary = false;
+ walk(el);
+ first = false;
+ continue;
+ }
+
+ walk(el);
+ if (pendingBlockBoundary) first = false;
+ }
+ };
+
+ walk(root);
+ return out;
+}
+
+/**
+ * Compare the live DOM's non-text structure against a token stream.
+ * Only element contributions are compared (badges by name/path, code
+ * spans by kind and source segment): text nodes are owned by the
+ * browser between rebuilds, so their split/merge state is irrelevant.
+ * A mismatch means token boundaries shifted (a code span was just
+ * completed or broken) and the DOM needs a rebuild to restyle.
+ */
+export function domMatchesTokens(root: HTMLElement, tokens: ContentToken[]): boolean {
+ const expected = tokens.filter((token) => token.kind !== 'text');
+ let index = 0;
+
+ const walk = (parent: Node): boolean => {
+ for (const child of Array.from(parent.childNodes)) {
+ if (child.nodeType !== Node.ELEMENT_NODE) continue;
+
+ const el = child as HTMLElement;
+ const isBadge = el.dataset.mentionBadge === 'true';
+ const isCode = el.dataset.codeToken !== undefined;
+
+ if (!isBadge && !isCode) {
+ if (!walk(el)) return false;
+ continue;
+ }
+
+ const token = expected[index++];
+ if (!token) return false;
+
+ if (isBadge) {
+ if (token.kind !== 'badge') return false;
+ if (token.name !== (el.dataset.mentionName ?? '')) return false;
+ if (token.path !== (el.dataset.mentionPath ?? '')) return false;
+ continue;
+ }
+
+ const codeKind = el.dataset.codeToken === 'block' ? 'codeBlock' : 'inlineCode';
+ if (token.kind !== codeKind) return false;
+ if (
+ (token.kind === 'inlineCode' || token.kind === 'codeBlock') &&
+ token.text !== (el.textContent ?? '')
+ ) {
+ return false;
+ }
+ }
+
+ return true;
+ };
+
+ return walk(root) && index === expected.length;
+}
+
+/**
+ * Plain-text offset of a `Range` in the root; null range (selection
+ * lost) falls back to buffer length. Walked against the live DOM (not
+ * a clone) so a `<br>` keeps its trailing/not-trailing context. Code
+ * spans count their full textContent (fences included) and the caret
+ * may land inside them; synthesized block boundaries count one `\n`
+ * once the caret is past them.
+ */
+export function rangeToTextOffset(root: HTMLElement, range: Range | null): number {
+ if (!range) return serializeContent(root).length;
+
+ // A point is at/before the caret iff it falls inside [root start, caret].
+ const pre = range.cloneRange();
+ pre.selectNodeContents(root);
+ pre.setEnd(range.endContainer, range.endOffset);
+ const atOrBeforeCaret = (node: Node, offset: number) => pre.comparePoint(node, offset) !== 1;
+
+ let total = 0;
+ let done = false;
+ // DOM position of a code block's synthesized after-boundary, set
+ // when walking past a block and consumed by the next contributing
+ // sibling (counts one `\n` once the caret is past it).
+ let pendingPoint: { node: Node; index: number } | null = null;
+
+ const walk = (parent: Node) => {
+ let first = true;
+
+ for (const child of Array.from(parent.childNodes)) {
+ if (done) return;
+
+ if (child.nodeType === Node.TEXT_NODE) {
+ const text = child.textContent ?? '';
+ if (text.length === 0) continue;
+ if (pendingPoint) {
+ const { node, index } = pendingPoint;
+ pendingPoint = null;
+ if (!atOrBeforeCaret(node, index)) {
+ done = true;
+ return;
+ }
+ total += 1;
+ }
+ if (!atOrBeforeCaret(child, 0)) {
+ done = true;
+ return;
+ }
+ if (range.endContainer === child) {
+ total += range.endOffset;
+ done = true;
+ return;
+ }
+ total += text.length;
+ first = false;
+ continue;
+ }
+
+ if (child.nodeType !== Node.ELEMENT_NODE) continue;
+
+ const el = child as HTMLElement;
+ const parentNode = el.parentNode as Node;
+ const elIndex = Array.prototype.indexOf.call(parentNode.childNodes, el);
+
+ if (pendingPoint) {
+ const { node, index } = pendingPoint;
+ pendingPoint = null;
+ if (!atOrBeforeCaret(node, index)) {
+ done = true;
+ return;
+ }
+ total += 1;
+ }
+
+ if (el.dataset.mentionBadge === 'true') {
+ const len = badgeSourceLength(el.dataset.mentionName ?? '', el.dataset.mentionPath ?? '');
+ if (len === 0) continue;
+ if (!atOrBeforeCaret(parentNode, elIndex + 1)) {
+ done = true;
+ return;
+ }
+ total += len;
+ first = false;
+ continue;
+ }
+
+ if (el.dataset.codeToken !== undefined) {
+ const isBlock = el.dataset.codeToken === 'block';
+ if (isBlock && !first) {
+ if (!atOrBeforeCaret(el, 0)) {
+ done = true;
+ return;
+ }
+ total += 1;
+ }
+ walk(el);
+ first = false;
+ if (isBlock) pendingPoint = { node: parentNode, index: elIndex + 1 };
+ continue;
+ }
+
+ if (el.tagName === 'BR') {
+ const isHatch =
+ isCodeBlockElement(el.previousSibling) || isCodeBlockElement(el.nextSibling);
+ if (isHatch || !el.nextSibling) continue;
+ if (!atOrBeforeCaret(parentNode, elIndex + 1)) {
+ done = true;
+ return;
+ }
+ total += 1;
+ first = false;
+ continue;
+ }
+
+ if (BLOCK_TAG_NAMES.has(el.tagName)) {
+ if (!first) {
+ if (!atOrBeforeCaret(el, 0)) {
+ done = true;
+ return;
+ }
+ total += 1;
+ }
+ walk(el);
+ first = false;
+ continue;
+ }
+
+ const before = total;
+ walk(el);
+ if (total > before) first = false;
+ }
+ };
+
+ walk(root);
+ return total;
+}
+
+/**
+ * Materialize a token stream into a DOM subtree: text nodes for text
+ * tokens, `<span data-mention-badge="true">` elements for badges,
+ * `<code data-code-token>` elements for code spans. The badge's class
+ * string + inline SVG are shared with the rehype plugin via
+ * `$lib/constants/mention-badge`.
+ */
+export function buildFragment(tokens: ContentToken[]): DocumentFragment {
+ const fragment = document.createDocumentFragment();
+
+ for (let index = 0; index < tokens.length; index++) {
+ const token = tokens[index];
+
+ if (token.kind === 'text') {
+ let text = token.text;
+
+ // The separator \n at a fenced-block boundary is synthesized
+ // at serialization time; keeping it in the DOM would render a
+ // phantom empty line next to the block.
+ if (tokens[index - 1]?.kind === 'codeBlock' && text.startsWith('\n')) {
+ text = text.slice(1);
+ }
+ if (tokens[index + 1]?.kind === 'codeBlock' && text.endsWith('\n')) {
+ text = text.slice(0, -1);
+ }
+ if (text.length === 0) continue;
+
+ fragment.appendChild(document.createTextNode(text));
+ continue;
+ }
+
+ if (token.kind === 'inlineCode' || token.kind === 'codeBlock') {
+ const code = document.createElement('code');
+ code.dataset.codeToken = token.kind === 'codeBlock' ? 'block' : 'inline';
+ code.textContent = token.text;
+ fragment.appendChild(code);
+ continue;
+ }
+
+ // A leading badge gets an empty text node prepended: without a real
+ // text position at the buffer start, the spot before the badge is
+ // unreachable via keyboard (ArrowLeft/Home).
+ if (!fragment.lastChild) {
+ fragment.appendChild(document.createTextNode(''));
+ }
+
+ const badge = document.createElement('span');
+ badge.dataset.mentionBadge = 'true';
+ badge.dataset.mentionName = token.name;
+ badge.dataset.mentionPath = token.path;
+ badge.title = decodeFileLinkPath(token.path);
+ badge.className = MENTION_BADGE_CLASSNAME;
+ badge.contentEditable = 'false';
+
+ const svg = document.createElementNS(MENTION_BADGE_SVG_ATTRIBUTES['xmlns'], 'svg');
+ for (const [attr, value] of Object.entries(MENTION_BADGE_SVG_ATTRIBUTES)) {
+ svg.setAttribute(attr, value);
+ }
+ for (const cls of MENTION_BADGE_ICON_CLASSNAME.split(/\s+/).filter(Boolean)) {
+ svg.classList.add(cls);
+ }
+
+ for (const d of getMentionBadgeIconPaths(token.path)) {
+ const path = document.createElementNS(MENTION_BADGE_SVG_ATTRIBUTES['xmlns'], 'path');
+ path.setAttribute('d', d);
+ svg.appendChild(path);
+ }
+
+ const label = document.createElement('span');
+ label.classList.add('shrink-0', 'truncate');
+ label.textContent = getMentionBadgeLabel(
+ token.name,
+ decodeFileLinkPath(token.path),
+ settingsStore.getConfig(SETTINGS_KEYS.SHOW_FULL_PATH_IN_MENTIONS),
+ toolsStore.serverHome
+ );
+
+ badge.appendChild(svg);
+ badge.appendChild(label);
+ fragment.appendChild(badge);
+ }
+
+ return fragment;
+}
+
+// A sibling provides a reachable caret line when it is an element
+// (badge, another block, an existing hatch) or a non-empty text node.
+function hasLineBeside(node: Node | null): boolean {
+ if (!node) return false;
+ if (node.nodeType === Node.ELEMENT_NODE) return true;
+ return (node.textContent ?? '') !== '';
+}
+
+/**
+ * A code block at the END of the buffer needs an editable line after
+ * it: without one the caret cannot leave the block with
+ * ArrowDown/ArrowRight. A trailing `<br>` provides that line while
+ * staying transparent to serialization (skipped as a hatch), and is
+ * removed again once real content takes its place.
+ *
+ * No hatch is added BEFORE a leading block: the empty line above it
+ * is transient and managed by the component (created when the caret
+ * arrows onto it, removed when the caret leaves). A transient
+ * leading hatch found here is kept; the browser's lone placeholder
+ * `<br>` in an empty root is left untouched.
+ */
+export function syncCodeBlockHatches(root: HTMLElement) {
+ for (const child of Array.from(root.childNodes)) {
+ if (child.nodeName !== 'BR') continue;
+
+ const isPlaceholder = root.childNodes.length === 1;
+ const isLeadingHatch = !child.previousSibling && isCodeBlockElement(child.nextSibling);
+ const isTrailingHatch = !child.nextSibling && isCodeBlockElement(child.previousSibling);
+
+ // A hatch goes stale once real content takes over its line:
+ // content before a leading hatch, content after a trailing one,
+ // or a text node after the block already providing the line.
+ // A `<br>` with no code block around is a real newline (browser
+ // Shift+Enter shape) and stays.
+ let prevElement = child.previousSibling;
+ while (prevElement && prevElement.nodeType !== Node.ELEMENT_NODE) {
+ prevElement = prevElement.previousSibling;
+ }
+ const nearBlock =
+ isCodeBlockElement(child.nextSibling) ||
+ isCodeBlockElement(child.previousSibling) ||
+ isCodeBlockElement(prevElement);
+
+ if (!isPlaceholder && !isLeadingHatch && !isTrailingHatch && nearBlock) {
+ child.remove();
+ }
+ }
+
+ for (const child of Array.from(root.childNodes)) {
+ if (!isCodeBlockElement(child)) continue;
+
+ if (!hasLineBeside(child.nextSibling)) {
+ child.after(document.createElement('br'));
+ }
+ }
+}
+
+/**
+ * Strip the separator and artificial newlines from an all-newline text
+ * node directly after a fenced block. Chromium's line break at the
+ * buffer end inserts an extra artificial `\n` so the new line has
+ * height, and the first `\n` after a block doubles as the fence's
+ * separator line (synthesized at serialization time). Removing both
+ * makes Shift+Enter after a block land the caret on the line directly
+ * below the block, like a plain textarea would.
+ *
+ * Only all-newline text nodes are touched: a node with real content
+ * carries intentional blank lines and is left alone. Returns true when
+ * the DOM changed.
+ */
+export function stripBlockBoundaryLineBreaks(root: HTMLElement): boolean {
+ let changed = false;
+
+ for (const child of Array.from(root.childNodes)) {
+ if (child.nodeType !== Node.TEXT_NODE) continue;
+ if (!isCodeBlockElement(child.previousSibling)) continue;
+
+ let text = child.textContent ?? '';
+ if (!/^\n{2,}$/.test(text)) continue;
+
+ text = text.slice(1);
+
+ const atBufferEnd = !child.nextSibling || child.nextSibling.nodeName === 'BR';
+ if (atBufferEnd) {
+ text = text.slice(0, -1);
+ }
+
+ child.textContent = text;
+ changed = true;
+ }
+
+ return changed;
+}
+
+const WORD_CHAR_RE = /[\p{L}\p{N}_]/u;
+
+/**
+ * Word-jump target (Option+Arrow / Ctrl+Arrow) in source offsets, or null
+ * when the jump crosses no badge and native word movement should handle
+ * it. Badge spans are masked to word characters, so a badge counts as
+ * exactly one word.
+ */
+export function badgeAwareWordJump(
+ source: string,
+ offset: number,
+ direction: 'forward' | 'backward'
+): number | null {
+ let masked = '';
+ const badgeSpans: Array<[number, number]> = [];
+
+ for (const token of tokenizeContent(source)) {
+ const len =
+ token.kind === 'badge' ? badgeSourceLength(token.name, token.path) : token.text.length;
+ if (token.kind === 'badge') badgeSpans.push([masked.length, masked.length + len]);
+ masked += token.kind === 'badge' ? 'a'.repeat(len) : token.text;
+ }
+
+ if (badgeSpans.length === 0) return null;
+
+ const isWord = (index: number) => WORD_CHAR_RE.test(masked[index]);
+ const spanStartingAt = (index: number) => badgeSpans.find(([start]) => start === index);
+ const spanEndingAt = (index: number) => badgeSpans.find(([, end]) => end === index);
+ const n = masked.length;
+ let i = offset;
+
+ if (direction === 'forward') {
+ // Entering a badge completes the word phase at the badge's end edge.
+ if (!(i < n && isWord(i))) {
+ while (i < n && !isWord(i)) i++;
+ }
+ while (i < n && isWord(i)) {
+ const span = spanStartingAt(i);
+ if (span) {
+ i = span[1];
+ break;
+ }
+ i++;
+ }
+ } else {
+ if (!(i > 0 && isWord(i - 1))) {
+ while (i > 0 && !isWord(i - 1)) i--;
+ }
+ while (i > 0 && isWord(i - 1)) {
+ const span = spanEndingAt(i);
+ if (span) {
+ i = span[0];
+ break;
+ }
+ i--;
+ }
+ }
+
+ if (i === offset) return null;
+
+ const lo = Math.min(offset, i);
+ const hi = Math.max(offset, i);
+ return badgeSpans.some(([start, end]) => start < hi && end > lo) ? i : null;
+}
+
+/**
+ * 0 when `caret` sits exactly at a leading badge's end edge, null
+ * otherwise. Plain ArrowLeft there has no native previous position, so
+ * the host snaps the caret to the buffer start manually.
+ */
+export function leadingBadgeEdgeOffset(source: string, caret: number): number | null {
+ const [first] = tokenizeContent(source);
+ if (!first || first.kind !== 'badge') return null;
+ return caret === badgeSourceLength(first.name, first.path) ? 0 : null;
+}
+
+/**
+ * Translate a plain-text offset into a degenerate `Range` at that
+ * position in the DOM; out-of-range offsets clamp to buffer end (before
+ * a trailing escape hatch, not after it). Zero offset lands BEFORE a
+ * badge or code span, and an offset exactly at a code span's end lands
+ * AFTER it, so typing at a code span's edge extends the surrounding
+ * text. Interior code-span offsets land in the element's text.
+ * Understands the same block/`<br>` newline shapes as
+ * `serializeContent`.
+ */
+export function textOffsetToRange(root: HTMLElement, offset: number): Range {
+ const range = document.createRange();
+ let remaining = offset;
+ let landed = false;
+ let pendingBlockBoundary = false;
+
+ const land = (node: Node, nodeOffset: number) => {
+ range.setStart(node, nodeOffset);
+ range.setEnd(node, nodeOffset);
+ landed = true;
+ };
+
+ const walk = (parent: Node) => {
+ let first = true;
+
+ for (const child of Array.from(parent.childNodes)) {
+ if (landed) return;
+
+ if (child.nodeType === Node.TEXT_NODE) {
+ const text = child.textContent ?? '';
+ if (text.length === 0) continue;
+ if (pendingBlockBoundary) {
+ // The synthesized separator maps to the near edge of the
+ // content that follows the block.
+ pendingBlockBoundary = false;
+ if (remaining === 0) {
+ land(child, 0);
+ return;
+ }
+ remaining -= 1;
+ }
+ if (remaining <= text.length) {
+ land(child, remaining);
+ return;
+ }
+ remaining -= text.length;
+ first = false;
+ continue;
+ }
+
+ if (child.nodeType !== Node.ELEMENT_NODE) continue;
+
+ const el = child as HTMLElement;
+
+ if (el.dataset.mentionBadge === 'true') {
+ const len = badgeSourceLength(el.dataset.mentionName ?? '', el.dataset.mentionPath ?? '');
+ if (len === 0) continue;
+ if (pendingBlockBoundary) {
+ pendingBlockBoundary = false;
+ if (remaining === 0) {
+ range.setStartBefore(el);
+ range.setEndBefore(el);
+ landed = true;
+ return;
+ }
+ remaining -= 1;
+ }
+ if (remaining <= len) {
+ if (remaining === 0) {
+ range.setStartBefore(el);
+ range.setEndBefore(el);
+ } else {
+ range.setStartAfter(el);
+ range.setEndAfter(el);
+ }
+ landed = true;
+ return;
+ }
+ remaining -= len;
+ first = false;
+ continue;
+ }
+
+ if (el.dataset.codeToken !== undefined) {
+ const isBlock = el.dataset.codeToken === 'block';
+ if (isBlock && (pendingBlockBoundary || !first)) {
+ pendingBlockBoundary = false;
+ if (remaining === 0) {
+ range.setStartBefore(el);
+ range.setEndBefore(el);
+ landed = true;
+ return;
+ }
+ remaining -= 1;
+ }
+
+ const len = (el.textContent ?? '').length;
+ if (remaining === 0) {
+ range.setStartBefore(el);
+ range.setEndBefore(el);
+ landed = true;
+ return;
+ }
+ if (remaining === len) {
+ range.setStartAfter(el);
+ range.setEndAfter(el);
+ landed = true;
+ return;
+ }
+ if (remaining < len) {
+ walk(el);
+ return;
+ }
+ remaining -= len;
+ if (isBlock) remaining -= 1;
+ first = false;
+ continue;
+ }
+
+ if (el.tagName === 'BR') {
+ const isHatch =
+ isCodeBlockElement(el.previousSibling) || isCodeBlockElement(el.nextSibling);
+ if (isHatch) {
+ // Escape hatch: no source length; offset 0 lands before it
+ // so text typed there takes its place.
+ if (remaining === 0) {
+ range.setStartBefore(el);
+ range.setEndBefore(el);
+ landed = true;
+ }
+ continue;
+ }
+ if (!el.nextSibling) continue;
+ if (pendingBlockBoundary) {
+ pendingBlockBoundary = false;
+ if (remaining === 0) {
+ range.setStartBefore(el);
+ range.setEndBefore(el);
+ landed = true;
+ return;
+ }
+ remaining -= 1;
+ }
+ if (remaining === 0) {
+ range.setStartBefore(el);
+ range.setEndBefore(el);
+ landed = true;
+ return;
+ }
+ remaining -= 1;
+ first = false;
+ continue;
+ }
+
+ if (BLOCK_TAG_NAMES.has(el.tagName)) {
+ if (pendingBlockBoundary || !first) {
+ pendingBlockBoundary = false;
+ if (remaining === 0) {
+ // The boundary newline belongs to the previous line.
+ range.setStartBefore(el);
+ range.setEndBefore(el);
+ landed = true;
+ return;
+ }
+ remaining -= 1;
+ }
+ walk(el);
+ first = false;
+ continue;
+ }
+
+ const before = remaining;
+ walk(el);
+ if (remaining < before) first = false;
+ }
+ };
+
+ walk(root);
+
+ if (!landed) {
+ const last = root.lastChild;
+ if (last && last.nodeName === 'BR') {
+ range.setStartBefore(last);
+ range.setEndBefore(last);
+ } else {
+ range.selectNodeContents(root);
+ range.collapse(false);
+ }
+ }
+
+ return range;
+}
export {
highlightCode,
detectIncompleteCodeBlock,
+ splitGluedClosingCodeFences,
trimCodePadding,
type IncompleteCodeBlock
} from './code';
type CommandDismissSnapshot
} from './command-token';
-// Mention-chip visual contract shared by the rehype file-badge plugin,
-// plus the `[name](file://...)` link helpers the mention picker splices in
+// Tokenization for the chat-form contenteditable (mention links + code spans <-> chip DOM)
export {
+ tokenizeContent,
+ containsCodeSpan,
+ isOffsetInCodeBlock,
+ domMatchesTokens,
+ syncCodeBlockHatches,
+ stripBlockBoundaryLineBreaks,
+ serializeContent,
+ buildFragment,
+ rangeToTextOffset,
+ textOffsetToRange,
+ badgeAwareWordJump,
+ leadingBadgeEdgeOffset,
+ type ContentToken
+} from './contenteditable-tokenizer';
+
+// Source-space undo/redo history for the chat-form contenteditable
+export { SourceHistory, type SourceHistoryEntry } from './source-history';
+
+// Mention-badge visual contract (used by the contenteditable / rehype
+// DOM paths that build the same chip without a Svelte mount)
+export {
+ containsFileMentionLink,
fileMentionLinkRe,
encodeFileLinkPath,
decodeFileLinkPath,
MENTION_BADGE_FOLDER_ICON_PATHS,
getMentionBadgeIconPaths,
getMentionBadgeLabel,
- buildMentionInsertion,
- mentionLinkEndingAt
+ buildMentionInsertion
} from './mention-badge';
// Agentic content utilities (structured section derivation)
return new RegExp(FILE_MENTION_LINK_SOURCE, flags);
}
+export function containsFileMentionLink(value: string): boolean {
+ return fileMentionLinkRe().test(value);
+}
+
// Escape each path segment for a markdown link destination (spaces/parens
// break CommonMark); keeps the trailing slash that marks a directory.
export function encodeFileLinkPath(path: string): string {
return abbreviateHome(decoded, home);
}
-/**
- * Extent of the mention link ending exactly at `caret`, so Backspace there
- * deletes the whole `[name](file://...)` token in one keystroke instead of
- * unraveling it character by character. Null when no link ends at `caret`.
- */
-export function mentionLinkEndingAt(
- value: string,
- caret: number
-): { start: number; end: number } | null {
- const re = fileMentionLinkRe('g');
- let match: RegExpExecArray | null;
- while ((match = re.exec(value)) !== null) {
- const end = match.index + match[0].length;
- if (end === caret) return { start: match.index, end };
- if (end > caret) break;
- }
- return null;
-}
-
/**
* Build the markdown link that replaces a mention token. Entry `path` is
* already rooted, so `file://` + `/abs` yields the canonical `file:///`.
--- /dev/null
+/**
+ * Source-space undo/redo history for the chat-form contenteditable, whose
+ * imperative DOM rebuilds destroy the browser's native undo stack.
+ * Entries record the state BEFORE an edit; edits within `groupWindowMs`
+ * extend the open group so a typing burst undoes as a unit, while
+ * structural edits (paste, mention insert, clear) pass `newGroup`.
+ */
+
+export interface SourceHistoryEntry {
+ value: string;
+ caret: number;
+}
+
+export class SourceHistory {
+ private undoStack: SourceHistoryEntry[] = [];
+ private redoStack: SourceHistoryEntry[] = [];
+ private lastPush = 0;
+
+ constructor(
+ private limit = 100,
+ private groupWindowMs = 800
+ ) {}
+
+ push(entry: SourceHistoryEntry, now: number, newGroup = false): void {
+ if (newGroup || now - this.lastPush >= this.groupWindowMs || this.undoStack.length === 0) {
+ this.undoStack.push(entry);
+ if (this.undoStack.length > this.limit) this.undoStack.shift();
+ }
+ this.lastPush = now;
+ this.redoStack = [];
+ }
+
+ undo(current: SourceHistoryEntry): SourceHistoryEntry | null {
+ const entry = this.undoStack.pop();
+ if (!entry) return null;
+ this.redoStack.push(current);
+ this.lastPush = 0; // the next edit after an undo starts a new group
+ return entry;
+ }
+
+ redo(current: SourceHistoryEntry): SourceHistoryEntry | null {
+ const entry = this.redoStack.pop();
+ if (!entry) return null;
+ this.undoStack.push(current);
+ this.lastPush = 0;
+ return entry;
+ }
+}
--- /dev/null
+// Guards the newline contract of the chat-form contenteditable: browsers
+// restructure the flat DOM on Enter (`<div>` wrappers, `<br>` shapes) and
+// serialization must fold those back into `\n` so the emitted value never
+// diverges from what is on screen.
+
+import { describe, it, expect } from 'vitest';
+import { render } from 'vitest-browser-svelte';
+import { tick } from 'svelte';
+import ChatFormContenteditableHarness from './components/ChatFormContenteditableHarness.svelte';
+
+const SOURCE = 'see [docs](file:///a/b) here';
+
+function editableIn(container: HTMLElement): HTMLElement {
+ const el = container.querySelector('[role="textbox"]');
+ if (!(el instanceof HTMLElement)) throw new Error('contenteditable not rendered');
+ return el;
+}
+
+function fireInput(root: HTMLElement) {
+ root.dispatchEvent(new InputEvent('input', { bubbles: true }));
+}
+
+function setCaret(node: Node, offset: number) {
+ const range = document.createRange();
+ range.setStart(node, offset);
+ range.setEnd(node, offset);
+ const selection = window.getSelection();
+ if (!selection) throw new Error('no selection');
+ selection.removeAllRanges();
+ selection.addRange(range);
+}
+
+describe('ChatFormContenteditable browser newline shapes', () => {
+ it('serializes a Chromium Enter <div> wrapper as a newline', async () => {
+ const screen = render(ChatFormContenteditableHarness, { value: SOURCE });
+ await tick();
+
+ const root = editableIn(screen.container);
+ const div = document.createElement('div');
+ div.textContent = 'second line';
+ root.appendChild(div);
+ fireInput(root);
+ await tick();
+
+ expect(screen.component.getValue()).toBe(`${SOURCE}\nsecond line`);
+ });
+
+ it('serializes a Firefox full <div> wrap as lines, badge included', async () => {
+ const screen = render(ChatFormContenteditableHarness, { value: SOURCE });
+ await tick();
+
+ const root = editableIn(screen.container);
+ const first = document.createElement('div');
+ while (root.firstChild) first.appendChild(root.firstChild);
+ const second = document.createElement('div');
+ second.textContent = 'second line';
+ root.appendChild(first);
+ root.appendChild(second);
+ fireInput(root);
+ await tick();
+
+ expect(screen.component.getValue()).toBe(`${SOURCE}\nsecond line`);
+ });
+
+ it('serializes a <br> as a newline', async () => {
+ const screen = render(ChatFormContenteditableHarness, { value: 'here' });
+ await tick();
+
+ const root = editableIn(screen.container);
+ root.appendChild(document.createElement('br'));
+ root.appendChild(document.createTextNode('second line'));
+ fireInput(root);
+ await tick();
+
+ expect(screen.component.getValue()).toBe('here\nsecond line');
+ });
+
+ it('ignores a trailing <br> (browser caret placeholder)', async () => {
+ const screen = render(ChatFormContenteditableHarness, { value: 'abc' });
+ await tick();
+
+ const root = editableIn(screen.container);
+ root.appendChild(document.createElement('br'));
+ fireInput(root);
+ await tick();
+
+ expect(screen.component.getValue()).toBe('abc');
+ });
+
+ it('serializes one newline per empty-line <div><br></div>', async () => {
+ const screen = render(ChatFormContenteditableHarness, { value: 'abc' });
+ await tick();
+
+ const root = editableIn(screen.container);
+ for (let i = 0; i < 2; i++) {
+ const div = document.createElement('div');
+ div.appendChild(document.createElement('br'));
+ root.appendChild(div);
+ }
+ fireInput(root);
+ await tick();
+
+ expect(screen.component.getValue()).toBe('abc\n\n');
+ });
+
+ it('treats a <div><br></div>-only buffer as empty for the placeholder', async () => {
+ const screen = render(ChatFormContenteditableHarness, { value: 'abc' });
+ await tick();
+
+ const root = editableIn(screen.container);
+ const div = document.createElement('div');
+ div.appendChild(document.createElement('br'));
+ root.replaceChildren(div);
+ fireInput(root);
+ await tick();
+
+ expect(screen.component.getValue()).toBe('');
+ expect(root.dataset.empty).toBe('true');
+ });
+
+ it('maps the caret across block boundaries in both directions', async () => {
+ const screen = render(ChatFormContenteditableHarness, { value: 'abc\ndef' });
+ await tick();
+
+ // Rebuild into the Chromium block shape; the source is unchanged,
+ // so no re-render fires.
+ const root = editableIn(screen.container);
+ const div = document.createElement('div');
+ div.textContent = 'def';
+ root.replaceChildren(document.createTextNode('abc'), div);
+ fireInput(root);
+ await tick();
+ expect(screen.component.getValue()).toBe('abc\ndef');
+
+ const divText = div.firstChild;
+ if (!divText) throw new Error('div text missing');
+
+ setCaret(divText, 2);
+ expect(screen.component.getCaretOffset()).toBe(6);
+
+ screen.component.setCaretOffset(6);
+ const selection = window.getSelection();
+ expect(selection?.anchorNode).toBe(divText);
+ expect(selection?.anchorOffset).toBe(2);
+
+ // The boundary newline itself: offset 3 is the end of "abc", offset
+ // 4 the start of the "def" line.
+ screen.component.setCaretOffset(4);
+ expect(window.getSelection()?.anchorNode).toBe(divText);
+ expect(window.getSelection()?.anchorOffset).toBe(0);
+
+ screen.component.setCaretOffset(3);
+ expect(window.getSelection()?.anchorNode).toBe(root.firstChild);
+ expect(window.getSelection()?.anchorOffset).toBe(3);
+ });
+});
--- /dev/null
+// Guards the editing-key contract of the chat-form contenteditable:
+// undo/redo is replayed from source snapshots (the token rebuilds destroy
+// the native undo stack), and Tab is NOT intercepted (WCAG 2.1.2 no
+// keyboard trap), matching the plain textarea.
+
+import { describe, it, expect } from 'vitest';
+import { render } from 'vitest-browser-svelte';
+import { tick } from 'svelte';
+import ChatFormContenteditableHarness from './components/ChatFormContenteditableHarness.svelte';
+
+const SOURCE = 'see [docs](file:///a/b)';
+
+function editableIn(container: HTMLElement): HTMLElement {
+ const el = container.querySelector('[role="textbox"]');
+ if (!(el instanceof HTMLElement)) throw new Error('contenteditable not rendered');
+ return el;
+}
+
+function type(root: HTMLElement, text: string, inputType = 'insertText') {
+ root.appendChild(document.createTextNode(text));
+ root.dispatchEvent(new InputEvent('input', { bubbles: true, inputType }));
+}
+
+function keydown(root: HTMLElement, init: KeyboardEventInit) {
+ const event = new KeyboardEvent('keydown', { bubbles: true, cancelable: true, ...init });
+ root.dispatchEvent(event);
+ return event;
+}
+
+describe('ChatFormContenteditable undo/redo', () => {
+ it('undoes and redoes an edit across a badge-containing buffer', async () => {
+ const screen = render(ChatFormContenteditableHarness, { value: SOURCE });
+ await tick();
+
+ const root = editableIn(screen.container);
+ type(root, ' more');
+ await tick();
+ expect(screen.component.getValue()).toBe(`${SOURCE} more`);
+
+ const undoEvent = keydown(root, { key: 'z', ctrlKey: true });
+ await tick();
+ expect(undoEvent.defaultPrevented).toBe(true);
+ expect(screen.component.getValue()).toBe(SOURCE);
+
+ const redoEvent = keydown(root, { key: 'z', ctrlKey: true, shiftKey: true });
+ await tick();
+ expect(redoEvent.defaultPrevented).toBe(true);
+ expect(screen.component.getValue()).toBe(`${SOURCE} more`);
+ });
+
+ it('redoes with Ctrl+Y as well', async () => {
+ const screen = render(ChatFormContenteditableHarness, { value: SOURCE });
+ await tick();
+
+ const root = editableIn(screen.container);
+ type(root, ' more');
+ await tick();
+ keydown(root, { key: 'z', metaKey: true });
+ await tick();
+ expect(screen.component.getValue()).toBe(SOURCE);
+
+ keydown(root, { key: 'y', ctrlKey: true });
+ await tick();
+ expect(screen.component.getValue()).toBe(`${SOURCE} more`);
+ });
+
+ it('coalesces a typing burst into one undo step', async () => {
+ const screen = render(ChatFormContenteditableHarness, { value: 'abc' });
+ await tick();
+
+ const root = editableIn(screen.container);
+ type(root, 'd');
+ type(root, 'e');
+ await tick();
+ expect(screen.component.getValue()).toBe('abcde');
+
+ keydown(root, { key: 'z', ctrlKey: true });
+ await tick();
+ expect(screen.component.getValue()).toBe('abc');
+ });
+
+ it('keeps a newline as its own undo step', async () => {
+ const screen = render(ChatFormContenteditableHarness, { value: 'abc' });
+ await tick();
+
+ const root = editableIn(screen.container);
+ type(root, 'd');
+ type(root, '\n', 'insertLineBreak');
+ await tick();
+ expect(screen.component.getValue()).toBe('abcd\n');
+
+ keydown(root, { key: 'z', ctrlKey: true });
+ await tick();
+ expect(screen.component.getValue()).toBe('abcd');
+
+ keydown(root, { key: 'z', ctrlKey: true });
+ await tick();
+ expect(screen.component.getValue()).toBe('abc');
+ });
+
+ it('is a no-op when there is nothing to undo', async () => {
+ const screen = render(ChatFormContenteditableHarness, { value: 'abc' });
+ await tick();
+
+ const root = editableIn(screen.container);
+ const event = keydown(root, { key: 'z', ctrlKey: true });
+ await tick();
+
+ expect(event.defaultPrevented).toBe(true);
+ expect(screen.component.getValue()).toBe('abc');
+ });
+
+ it('abandons the redo branch after a fresh edit', async () => {
+ const screen = render(ChatFormContenteditableHarness, { value: 'abc' });
+ await tick();
+
+ const root = editableIn(screen.container);
+ type(root, 'd');
+ await tick();
+ keydown(root, { key: 'z', ctrlKey: true });
+ await tick();
+ expect(screen.component.getValue()).toBe('abc');
+
+ type(root, 'e');
+ await tick();
+ keydown(root, { key: 'z', ctrlKey: true, shiftKey: true });
+ await tick();
+ expect(screen.component.getValue()).toBe('abce');
+ });
+});
+
+describe('ChatFormContenteditable Tab key', () => {
+ it('does not trap Tab (focus can leave the editable)', async () => {
+ const screen = render(ChatFormContenteditableHarness, { value: SOURCE });
+ await tick();
+
+ const root = editableIn(screen.container);
+ const event = keydown(root, { key: 'Tab' });
+
+ expect(event.defaultPrevented).toBe(false);
+ });
+});
--- /dev/null
+// Guards the clipboard contract of the chat-form contenteditable:
+// copy/cut expose the markdown SOURCE of the selection (each badge
+// contributes its full `[name](file://...)` link) and pasting such
+// markdown re-renders the badges.
+
+import { describe, it, expect, vi } from 'vitest';
+import { render } from 'vitest-browser-svelte';
+import { userEvent } from 'vitest/browser';
+import { tick } from 'svelte';
+import { rangeToTextOffset, serializeContent, textOffsetToRange } from '$lib/utils';
+import ChatFormContenteditable from '$lib/components/app/chat/ChatForm/ChatFormContenteditable.svelte';
+
+const SOURCE = 'hello [docs](file:///a/b) world';
+const BADGE_SELECTOR = '[data-mention-badge="true"]';
+
+function editableIn(container: HTMLElement): HTMLElement {
+ const el = container.querySelector('[role="textbox"]');
+ if (!(el instanceof HTMLElement)) throw new Error('contenteditable not rendered');
+ return el;
+}
+
+function setSelection(root: HTMLElement, place: (range: Range, root: HTMLElement) => void) {
+ const range = document.createRange();
+ place(range, root);
+ const selection = window.getSelection();
+ if (!selection) throw new Error('no selection');
+ selection.removeAllRanges();
+ selection.addRange(range);
+}
+
+function clipboardEvent(type: 'copy' | 'cut' | 'paste', text = '') {
+ const data = new DataTransfer();
+ if (text) data.setData('text/plain', text);
+ const event = new ClipboardEvent(type, { clipboardData: data, bubbles: true, cancelable: true });
+ return { event, data };
+}
+
+describe('ChatFormContenteditable clipboard', () => {
+ it('copy exposes the markdown source of the selection', async () => {
+ const { container } = render(ChatFormContenteditable, { value: SOURCE });
+ await tick();
+
+ const root = editableIn(container);
+ setSelection(root, (range) => range.selectNodeContents(root));
+
+ const { event, data } = clipboardEvent('copy');
+ root.dispatchEvent(event);
+
+ expect(event.defaultPrevented).toBe(true);
+ expect(data.getData('text/plain')).toBe(SOURCE);
+ });
+
+ it('cut exposes the markdown source and removes the slice', async () => {
+ const { container } = render(ChatFormContenteditable, { value: SOURCE });
+ await tick();
+
+ const root = editableIn(container);
+ setSelection(root, (range) => {
+ const badge = root.querySelector(BADGE_SELECTOR);
+ if (!badge) throw new Error('badge not rendered');
+ range.setStartBefore(badge);
+ range.setEndAfter(badge);
+ });
+
+ const { event, data } = clipboardEvent('cut');
+ root.dispatchEvent(event);
+
+ expect(event.defaultPrevented).toBe(true);
+ expect(data.getData('text/plain')).toBe('[docs](file:///a/b)');
+ expect(root.querySelector(BADGE_SELECTOR)).toBeNull();
+ expect(root.textContent).toBe('hello world');
+ });
+
+ it('paste of markdown mention links re-renders badges', async () => {
+ const { container } = render(ChatFormContenteditable, { value: 'hello ' });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ setSelection(root, (range) => {
+ range.selectNodeContents(root);
+ range.collapse(false);
+ });
+
+ const { event } = clipboardEvent('paste', '[docs](file:///a/b) world');
+ root.dispatchEvent(event);
+ await tick();
+
+ expect(event.defaultPrevented).toBe(true);
+ const badge = root.querySelector(BADGE_SELECTOR);
+ expect(badge).not.toBeNull();
+ expect(badge!.getAttribute('data-mention-name')).toBe('docs');
+ expect(root.textContent).toContain('world');
+ });
+
+ it('paste without mention links keeps the DOM untouched', async () => {
+ const { container } = render(ChatFormContenteditable, { value: 'hello ' });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ setSelection(root, (range) => {
+ range.selectNodeContents(root);
+ range.collapse(false);
+ });
+ const firstChild = root.firstChild;
+
+ const { event } = clipboardEvent('paste', 'plain text');
+ root.dispatchEvent(event);
+ await tick();
+
+ expect(event.defaultPrevented).toBe(true);
+ expect(root.querySelector(BADGE_SELECTOR)).toBeNull();
+ // no rebuild: the live text node is the same instance
+ expect(root.firstChild).toBe(firstChild);
+ });
+});
+
+describe('ChatFormContenteditable code spans', () => {
+ it('renders inline code from the initial value', async () => {
+ const { container } = render(ChatFormContenteditable, { value: 'run `npm test` now' });
+ await tick();
+
+ const root = editableIn(container);
+ const code = root.querySelector('code[data-code-token="inline"]');
+ expect(code).not.toBeNull();
+ expect(code!.textContent).toBe('`npm test`');
+ });
+
+ it('renders a fenced code block with a language', async () => {
+ const source = 'before\n```js\nconst a = 1;\n```\nafter';
+ const { container } = render(ChatFormContenteditable, { value: source });
+ await tick();
+
+ const root = editableIn(container);
+ const code = root.querySelector('code[data-code-token="block"]');
+ expect(code).not.toBeNull();
+ expect(code!.textContent).toBe('```js\nconst a = 1;\n```');
+ });
+
+ it('copy exposes the markdown source of a selection spanning code', async () => {
+ const source = 'run `npm test` now';
+ const { container } = render(ChatFormContenteditable, { value: source });
+ await tick();
+
+ const root = editableIn(container);
+ setSelection(root, (range) => range.selectNodeContents(root));
+
+ const { event, data } = clipboardEvent('copy');
+ root.dispatchEvent(event);
+
+ expect(event.defaultPrevented).toBe(true);
+ expect(data.getData('text/plain')).toBe(source);
+ });
+
+ it('paste of a code span renders the styled element', async () => {
+ const { container } = render(ChatFormContenteditable, { value: 'run ' });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ setSelection(root, (range) => {
+ range.selectNodeContents(root);
+ range.collapse(false);
+ });
+
+ const { event } = clipboardEvent('paste', '`npm test` now');
+ root.dispatchEvent(event);
+ await tick();
+
+ expect(event.defaultPrevented).toBe(true);
+ const code = root.querySelector('code[data-code-token="inline"]');
+ expect(code).not.toBeNull();
+ expect(code!.textContent).toBe('`npm test`');
+ expect(root.textContent).toContain('now');
+ });
+
+ it('highlights a fenced block content and stays byte-exact', async () => {
+ const source = '```js\nconst a = 1;\n```';
+ const { container } = render(ChatFormContenteditable, { value: source });
+ await tick();
+
+ const root = editableIn(container);
+ const code = root.querySelector('code[data-code-token="block"]');
+ expect(code).not.toBeNull();
+ expect(code!.querySelector('.hljs-keyword')).not.toBeNull();
+ expect(code!.textContent).toBe(source);
+ });
+
+ it('does not highlight inline code', async () => {
+ const { container } = render(ChatFormContenteditable, { value: 'run `const` now' });
+ await tick();
+
+ const root = editableIn(container);
+ expect(root.querySelector('[class*="hljs-"]')).toBeNull();
+ });
+});
+
+describe('ChatFormContenteditable code block escape hatches', () => {
+ const BLOCK_SOURCE = '```js\nconst a = 1;\n```';
+ const BLOCK_SELECTOR = 'code[data-code-token="block"]';
+
+ function blockIn(root: HTMLElement): HTMLElement {
+ const el = root.querySelector(BLOCK_SELECTOR);
+ if (!(el instanceof HTMLElement)) throw new Error('code block not rendered');
+ return el;
+ }
+
+ // Caret at the very start/end of the block's text (across highlight spans)
+ function placeCaretInBlock(root: HTMLElement, where: 'start' | 'end') {
+ const code = blockIn(root);
+ const walker = document.createTreeWalker(code, NodeFilter.SHOW_TEXT);
+ let target: Node | null = null;
+ for (let n = walker.nextNode(); n; n = walker.nextNode()) {
+ target = where === 'start' ? (target ?? n) : n;
+ }
+ if (!target) throw new Error('no text inside code block');
+ setSelection(root, (range) => {
+ range.setStart(target!, where === 'start' ? 0 : (target!.textContent ?? '').length);
+ range.collapse(true);
+ });
+ }
+
+ function caretContainer(): Node {
+ const selection = window.getSelection();
+ if (!selection || selection.rangeCount === 0) throw new Error('no selection');
+ return selection.getRangeAt(0).startContainer;
+ }
+
+ it('pads a trailing code block with a br hatch that stays invisible to copy', async () => {
+ const { container } = render(ChatFormContenteditable, { value: BLOCK_SOURCE });
+ await tick();
+
+ const root = editableIn(container);
+ // no permanent empty line above a leading block
+ expect(root.firstChild).toBe(blockIn(root));
+ expect(root.lastChild?.nodeName).toBe('BR');
+
+ setSelection(root, (range) => range.selectNodeContents(root));
+ const { event, data } = clipboardEvent('copy');
+ root.dispatchEvent(event);
+
+ expect(data.getData('text/plain')).toBe(BLOCK_SOURCE);
+ });
+
+ it('escapes a trailing code block with ArrowDown and types after it', async () => {
+ const { container } = render(ChatFormContenteditable, { value: BLOCK_SOURCE });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ placeCaretInBlock(root, 'end');
+
+ await userEvent.keyboard('{ArrowDown}');
+ expect(blockIn(root).contains(caretContainer())).toBe(false);
+
+ await userEvent.keyboard('x');
+ await tick();
+
+ expect(blockIn(root).textContent).toBe(BLOCK_SOURCE);
+ // the DOM holds no separator newline (it would render as a
+ // phantom empty line); serialization synthesizes it so the
+ // markdown source keeps the text below the block
+ expect(root.textContent).toBe(BLOCK_SOURCE + 'x');
+ expect(serializeContent(root)).toBe(BLOCK_SOURCE + '\nx');
+ // the stale trailing hatch is removed once real text follows the block
+ expect(root.lastChild?.nodeName).not.toBe('BR');
+ });
+
+ it('escapes a leading code block with ArrowUp and types before it', async () => {
+ const { container } = render(ChatFormContenteditable, { value: BLOCK_SOURCE });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ placeCaretInBlock(root, 'start');
+
+ await userEvent.keyboard('{ArrowUp}');
+ expect(blockIn(root).contains(caretContainer())).toBe(false);
+ // the transient hatch line exists while the caret sits on it
+ expect(root.firstChild?.nodeName).toBe('BR');
+
+ await userEvent.keyboard('y');
+ await tick();
+
+ expect(blockIn(root).textContent).toBe(BLOCK_SOURCE);
+ expect(root.textContent).toBe('y' + BLOCK_SOURCE);
+ expect(serializeContent(root)).toBe('y\n' + BLOCK_SOURCE);
+ // the typed text consumed the hatch
+ expect(root.firstChild?.nodeName).not.toBe('BR');
+ });
+
+ it('escapes a leading code block with ArrowLeft from its first character', async () => {
+ const { container } = render(ChatFormContenteditable, { value: BLOCK_SOURCE });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ placeCaretInBlock(root, 'start');
+
+ await userEvent.keyboard('{ArrowLeft}');
+ expect(blockIn(root).contains(caretContainer())).toBe(false);
+ expect(root.firstChild?.nodeName).toBe('BR');
+ });
+
+ it('removes the transient leading hatch when the caret moves back into the block', async () => {
+ const { container } = render(ChatFormContenteditable, { value: BLOCK_SOURCE });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ placeCaretInBlock(root, 'start');
+
+ await userEvent.keyboard('{ArrowUp}');
+ expect(root.firstChild?.nodeName).toBe('BR');
+
+ await userEvent.keyboard('{ArrowDown}');
+ await tick();
+
+ expect(blockIn(root).contains(caretContainer())).toBe(true);
+ expect(root.firstChild).toBe(blockIn(root));
+ });
+
+ it('extends the selection out of the block with Shift+ArrowDown', async () => {
+ const { container } = render(ChatFormContenteditable, { value: BLOCK_SOURCE });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ placeCaretInBlock(root, 'end');
+
+ await userEvent.keyboard('{Shift>}{ArrowDown}{/Shift}');
+
+ const selection = window.getSelection();
+ expect(selection).not.toBeNull();
+ expect(selection!.isCollapsed).toBe(false);
+ expect(blockIn(root).contains(selection!.getRangeAt(0).endContainer)).toBe(false);
+ });
+
+ it('line-separates text typed right after the closing fence', async () => {
+ const { container } = render(ChatFormContenteditable, { value: BLOCK_SOURCE });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ placeCaretInBlock(root, 'end');
+
+ // no arrow keys: the caret sits at the block's end edge, where the
+ // post-rebuild restore lands it, and the typed text renders on the
+ // line below the block
+ await userEvent.keyboard('x');
+ await tick();
+
+ // the text stays on the caret's line in the DOM (no phantom empty
+ // line); the source gets the separator newline
+ expect(root.textContent).toBe(BLOCK_SOURCE + 'x');
+ expect(serializeContent(root)).toBe(BLOCK_SOURCE + '\nx');
+ });
+
+ it('does not double the newline when Shift+Enter already added one', async () => {
+ const { container } = render(ChatFormContenteditable, { value: BLOCK_SOURCE });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ placeCaretInBlock(root, 'end');
+
+ await userEvent.keyboard('{Shift>}{Enter}{/Shift}');
+ await userEvent.keyboard('x');
+ await tick();
+
+ expect(root.textContent).toBe(BLOCK_SOURCE + 'x');
+ expect(serializeContent(root)).toBe(BLOCK_SOURCE + '\nx');
+ });
+
+ it('moves a caret stuck before the inserted newline onto the new line', async () => {
+ const { container } = render(ChatFormContenteditable, {
+ value: BLOCK_SOURCE + '\ntext after the code block'
+ });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+
+ // post-break DOM some browsers produce: the inserted newline plus
+ // the artificial trailing one, with the caret stuck BEFORE the
+ // inserted one (visually at the end of the old line)
+ root.appendChild(document.createTextNode('\n'));
+ root.appendChild(document.createTextNode('\n'));
+ setSelection(root, (range) => {
+ range.setStart(root.childNodes[2], 0);
+ range.collapse(true);
+ });
+
+ root.dispatchEvent(new InputEvent('input', { inputType: 'insertLineBreak', bubbles: true }));
+ await tick();
+
+ const selection = window.getSelection();
+ expect(rangeToTextOffset(root, selection!.getRangeAt(0))).toBe(
+ (BLOCK_SOURCE + '\ntext after the code block\n').length
+ );
+ expect(serializeContent(root)).toBe(BLOCK_SOURCE + '\ntext after the code block\n\n');
+ });
+
+ it('appends the artificial trailing newline when the browser did not add one', async () => {
+ const { container } = render(ChatFormContenteditable, {
+ value: BLOCK_SOURCE + '\ntext after the code block'
+ });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+
+ // post-break DOM some browsers produce: a lone trailing \n (or a
+ // <br> the hatch sync strips). Collapsed by the renderer, so the
+ // caret looks stuck on the old line and the next typed character
+ // would consume the newline.
+ root.appendChild(document.createTextNode('\n'));
+ setSelection(root, (range) => {
+ range.setStart(root.childNodes[2], 1);
+ range.collapse(true);
+ });
+
+ root.dispatchEvent(new InputEvent('input', { inputType: 'insertLineBreak', bubbles: true }));
+ await tick();
+
+ const selection = window.getSelection();
+ expect(rangeToTextOffset(root, selection!.getRangeAt(0))).toBe(
+ (BLOCK_SOURCE + '\ntext after the code block\n').length
+ );
+ expect(serializeContent(root)).toBe(BLOCK_SOURCE + '\ntext after the code block\n\n');
+ });
+
+ it('lands the caret on the new line with a single Shift+Enter after text below a block', async () => {
+ const { container } = render(ChatFormContenteditable, {
+ value: BLOCK_SOURCE + '\ntext after the code block'
+ });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ setSelection(root, (range) => {
+ const text = root.childNodes[1];
+ range.setStart(text, (text.textContent ?? '').length);
+ range.collapse(true);
+ });
+
+ await userEvent.keyboard('{Shift>}{Enter}{/Shift}');
+ await tick();
+
+ const selection = window.getSelection();
+ expect(rangeToTextOffset(root, selection!.getRangeAt(0))).toBe(
+ (BLOCK_SOURCE + '\ntext after the code block\n').length
+ );
+ expect(serializeContent(root)).toBe(BLOCK_SOURCE + '\ntext after the code block\n\n');
+
+ // the next typed character lands on the new line
+ await userEvent.keyboard('x');
+ await tick();
+ expect(serializeContent(root)).toBe(BLOCK_SOURCE + '\ntext after the code block\nx');
+ });
+
+ it('lets Backspace at the text start move into the block without a source fight', async () => {
+ const { container } = render(ChatFormContenteditable, { value: BLOCK_SOURCE });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ placeCaretInBlock(root, 'end');
+
+ await userEvent.keyboard('{ArrowDown}');
+ await userEvent.keyboard('create');
+ await tick();
+ expect(serializeContent(root)).toBe(BLOCK_SOURCE + '\ncreate');
+
+ // Backspace at the start of the text line: the separator newline
+ // is structural (synthesized while text follows the block), so
+ // the caret just moves to the block's edge - nothing is re-added
+ await userEvent.keyboard('{Home}');
+ await userEvent.keyboard('{Backspace}');
+ await tick();
+
+ expect(serializeContent(root)).toBe(BLOCK_SOURCE + '\ncreate');
+ expect(caretContainer()).toBe(root);
+ });
+
+ it('lets forward Delete eat the text after a block normally', async () => {
+ const { container } = render(ChatFormContenteditable, { value: BLOCK_SOURCE });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ placeCaretInBlock(root, 'end');
+
+ await userEvent.keyboard('{ArrowDown}');
+ await userEvent.keyboard('create');
+ await tick();
+
+ await userEvent.keyboard('{Home}');
+ await userEvent.keyboard('{Delete}');
+ await tick();
+
+ expect(serializeContent(root)).toBe(BLOCK_SOURCE + '\nreate');
+ });
+
+ it('renders text after a block without a phantom empty line', async () => {
+ const { container } = render(ChatFormContenteditable, {
+ value: BLOCK_SOURCE + '\nhello'
+ });
+ await tick();
+
+ const root = editableIn(container);
+ expect(root.textContent).toBe(BLOCK_SOURCE + 'hello');
+ expect(serializeContent(root)).toBe(BLOCK_SOURCE + '\nhello');
+ });
+
+ it('keeps an intentional blank line after a block out of the separator', async () => {
+ const { container } = render(ChatFormContenteditable, {
+ value: BLOCK_SOURCE + '\n\nhello'
+ });
+ await tick();
+
+ const root = editableIn(container);
+ expect(root.textContent).toBe(BLOCK_SOURCE + '\nhello');
+ expect(serializeContent(root)).toBe(BLOCK_SOURCE + '\n\nhello');
+ });
+
+ it('re-highlights while typing inside a block and keeps the caret', async () => {
+ const { container } = render(ChatFormContenteditable, { value: BLOCK_SOURCE });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+
+ // caret at the start of the block content (after the opening fence)
+ setSelection(root, (range) => {
+ const target = textOffsetToRange(root, 6);
+ range.setStart(target.startContainer, target.startOffset);
+ range.collapse(true);
+ });
+
+ await userEvent.keyboard('x');
+ await tick();
+
+ const code = blockIn(root);
+ expect(serializeContent(root)).toBe('```js\nxconst a = 1;\n```');
+ expect(code.textContent).toBe('```js\nxconst a = 1;\n```');
+ expect(code.querySelector('.hljs-number')).not.toBeNull();
+
+ const selection = window.getSelection();
+ expect(code.contains(selection!.getRangeAt(0).startContainer)).toBe(true);
+ expect(rangeToTextOffset(root, selection!.getRangeAt(0))).toBe(7);
+ });
+});
+
+describe('ChatFormContenteditable Enter in code blocks', () => {
+ const BLOCK_SOURCE = '```js\nconst a = 1;\n```';
+
+ it('adds a line instead of submitting on plain Enter inside a block', async () => {
+ const onKeydown = vi.fn();
+ const { container } = render(ChatFormContenteditable, {
+ value: BLOCK_SOURCE,
+ onKeydown
+ });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+
+ // caret at the start of the block content (after the opening fence)
+ setSelection(root, (range) => {
+ const target = textOffsetToRange(root, 6);
+ range.setStart(target.startContainer, target.startOffset);
+ range.collapse(true);
+ });
+
+ await userEvent.keyboard('{Enter}');
+ await tick();
+
+ // consumed locally: the parent's submit handler never sees it
+ expect(onKeydown).not.toHaveBeenCalled();
+ expect(serializeContent(root)).toBe('```js\n\nconst a = 1;\n```');
+
+ const code = root.querySelector('code[data-code-token="block"]');
+ const selection = window.getSelection();
+ expect(code!.contains(selection!.getRangeAt(0).startContainer)).toBe(true);
+ expect(rangeToTextOffset(root, selection!.getRangeAt(0))).toBe(7);
+ });
+
+ it('adds a line after a still-open fence (no closing ``` yet)', async () => {
+ const onKeydown = vi.fn();
+ const { container } = render(ChatFormContenteditable, {
+ value: '```js\nconst a = 1;',
+ onKeydown
+ });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+
+ // caret at the start of the block content (after the opening fence)
+ setSelection(root, (range) => {
+ const target = textOffsetToRange(root, 6);
+ range.setStart(target.startContainer, target.startOffset);
+ range.collapse(true);
+ });
+
+ await userEvent.keyboard('{Enter}');
+ await tick();
+
+ expect(onKeydown).not.toHaveBeenCalled();
+ expect(serializeContent(root)).toBe('```js\n\nconst a = 1;');
+ });
+
+ it('forwards plain Enter to the parent when the caret is outside a block', async () => {
+ const onKeydown = vi.fn();
+ const { container } = render(ChatFormContenteditable, {
+ value: BLOCK_SOURCE + '\nafter',
+ onKeydown
+ });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ setSelection(root, (range) => {
+ range.selectNodeContents(root);
+ range.collapse(false);
+ });
+
+ await userEvent.keyboard('{Enter}');
+
+ expect(onKeydown).toHaveBeenCalledTimes(1);
+ expect(onKeydown.mock.calls[0][0].defaultPrevented).toBe(false);
+ });
+
+ it('forwards plain Enter on the trailing hatch line after a block', async () => {
+ const onKeydown = vi.fn();
+ const { container } = render(ChatFormContenteditable, {
+ value: BLOCK_SOURCE,
+ onKeydown
+ });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ // root-level caret between the block and its trailing br hatch
+ setSelection(root, (range) => {
+ range.setStart(root, 1);
+ range.collapse(true);
+ });
+
+ await userEvent.keyboard('{Enter}');
+
+ expect(onKeydown).toHaveBeenCalledTimes(1);
+ });
+
+ it('forwards Ctrl+Enter inside a block so explicit submit survives', async () => {
+ const onKeydown = vi.fn();
+ const { container } = render(ChatFormContenteditable, {
+ value: BLOCK_SOURCE,
+ onKeydown
+ });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ setSelection(root, (range) => {
+ const target = textOffsetToRange(root, 6);
+ range.setStart(target.startContainer, target.startOffset);
+ range.collapse(true);
+ });
+
+ await userEvent.keyboard('{Control>}{Enter}{/Control}');
+
+ expect(onKeydown).toHaveBeenCalledWith(
+ expect.objectContaining({ key: 'Enter', ctrlKey: true })
+ );
+ expect(serializeContent(root)).toBe(BLOCK_SOURCE);
+ });
+
+ it('forwards Enter inside an inline code span', async () => {
+ const onKeydown = vi.fn();
+ const { container } = render(ChatFormContenteditable, {
+ value: 'run `npm test` now',
+ onKeydown
+ });
+ await tick();
+
+ const root = editableIn(container);
+ root.focus();
+ const code = root.querySelector('code[data-code-token="inline"]')!;
+ setSelection(root, (range) => {
+ range.setStart(code.firstChild!, 3);
+ range.collapse(true);
+ });
+
+ await userEvent.keyboard('{Enter}');
+
+ expect(onKeydown).toHaveBeenCalledTimes(1);
+ });
+});
--- /dev/null
+// Guards the Enter-key contract of the chat form against the
+// fenced-code-block flow: while the caret sits inside a fenced
+// block region - closed, or still OPEN while the user is typing
+// one - plain Enter adds a line instead of submitting the message.
+// The textarea path is covered here end-to-end (the contenteditable
+// consumes the same case locally; see chat-form-contenteditable).
+
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { render } from 'vitest-browser-svelte';
+import { userEvent } from 'vitest/browser';
+import { tick } from 'svelte';
+import { SETTINGS_KEYS } from '$lib/constants/settings-keys';
+import { settingsStore } from '$lib/stores/settings.svelte';
+import ChatFormTestWrapper from './components/ChatFormTestWrapper.svelte';
+
+function textareaIn(container: HTMLElement): HTMLTextAreaElement {
+ const el = container.querySelector('textarea');
+ if (!(el instanceof HTMLTextAreaElement)) throw new Error('textarea not rendered');
+ return el;
+}
+
+describe('ChatForm Enter in code blocks', () => {
+ beforeEach(() => {
+ settingsStore.updateConfig(SETTINGS_KEYS.SEND_ON_ENTER, true);
+ });
+
+ it('adds a line after a still-open fence instead of submitting', async () => {
+ const onSubmit = vi.fn();
+ const { container } = render(ChatFormTestWrapper, { onSubmit });
+ await tick();
+
+ const textarea = textareaIn(container);
+ await userEvent.click(textarea);
+ await userEvent.keyboard('```');
+ await tick();
+
+ await userEvent.keyboard('{Enter}');
+ await tick();
+
+ expect(onSubmit).not.toHaveBeenCalled();
+ expect(textarea.value).toBe('```\n');
+ });
+
+ it('keeps adding lines while the block stays open', async () => {
+ const onSubmit = vi.fn();
+ const { container } = render(ChatFormTestWrapper, { onSubmit });
+ await tick();
+
+ const textarea = textareaIn(container);
+ await userEvent.click(textarea);
+ await userEvent.keyboard('```js');
+ await tick();
+
+ await userEvent.keyboard('{Enter}');
+ await userEvent.keyboard('const a = 1;');
+ await userEvent.keyboard('{Enter}');
+ await tick();
+
+ expect(onSubmit).not.toHaveBeenCalled();
+ expect(textarea.value).toBe('```js\nconst a = 1;\n');
+ });
+
+ it('submits when the caret is before the opening fence', async () => {
+ const onSubmit = vi.fn();
+ const { container } = render(ChatFormTestWrapper, { onSubmit });
+ await tick();
+
+ const textarea = textareaIn(container);
+ await userEvent.click(textarea);
+ await userEvent.keyboard('```');
+ await tick();
+
+ textarea.setSelectionRange(0, 0);
+
+ await userEvent.keyboard('{Enter}');
+ await tick();
+
+ expect(onSubmit).toHaveBeenCalledTimes(1);
+ });
+
+ it('submits on Enter outside a code block', async () => {
+ const onSubmit = vi.fn();
+ const { container } = render(ChatFormTestWrapper, { onSubmit });
+ await tick();
+
+ const textarea = textareaIn(container);
+ await userEvent.click(textarea);
+ await userEvent.keyboard('hello');
+ await tick();
+
+ await userEvent.keyboard('{Enter}');
+ await tick();
+
+ expect(onSubmit).toHaveBeenCalledTimes(1);
+ });
+
+ it('submits on Ctrl+Enter even inside a code block', async () => {
+ const onSubmit = vi.fn();
+ const { container } = render(ChatFormTestWrapper, { onSubmit });
+ await tick();
+
+ const textarea = textareaIn(container);
+ await userEvent.click(textarea);
+ await userEvent.keyboard('```');
+ await tick();
+
+ await userEvent.keyboard('{Control>}{Enter}{/Control}');
+ await tick();
+
+ expect(onSubmit).toHaveBeenCalledTimes(1);
+ });
+});
--- /dev/null
+<script lang="ts">
+ import { untrack } from 'svelte';
+ import ChatFormContenteditable from '$lib/components/app/chat/ChatForm/ChatFormContenteditable.svelte';
+
+ interface Props {
+ value?: string;
+ }
+
+ let { value: initial = '' }: Props = $props();
+
+ let value = $state(untrack(() => initial));
+ let inputRef: ChatFormContenteditable | undefined = $state(undefined);
+
+ export function getValue() {
+ return value;
+ }
+
+ export function getCaretOffset() {
+ return inputRef?.getCaretOffset();
+ }
+
+ export function setCaretOffset(offset: number) {
+ inputRef?.setCaretOffset(offset);
+ }
+</script>
+
+<ChatFormContenteditable bind:this={inputRef} bind:value />
--- /dev/null
+<script lang="ts">
+ import * as Tooltip from '$lib/components/ui/tooltip';
+ import ChatForm from '$lib/components/app/chat/ChatForm/ChatForm.svelte';
+
+ let { onSubmit }: { onSubmit?: () => void } = $props();
+
+ let value = $state('');
+</script>
+
+<Tooltip.Provider>
+ <ChatForm bind:value {onSubmit} />
+</Tooltip.Provider>
import { describe, expect, it } from 'vitest';
-import { highlightCode, trimCodePadding } from '$lib/utils/code';
+import { highlightCode, splitGluedClosingCodeFences, trimCodePadding } from '$lib/utils/code';
describe('trimCodePadding', () => {
it('removes a single leading newline', () => {
expect(html).toBe('<script>a && b</script>');
});
});
+
+describe('splitGluedClosingCodeFences', () => {
+ it('splits text glued to a closing fence onto its own line', () => {
+ const input = "```ts\nlet foo = 'bar';\n```create this file on [Desktop](file:///a/b/)";
+ expect(splitGluedClosingCodeFences(input)).toBe(
+ "```ts\nlet foo = 'bar';\n```\ncreate this file on [Desktop](file:///a/b/)"
+ );
+ });
+
+ it('leaves a well-formed code block untouched', () => {
+ const input = "```ts\nlet foo = 'bar';\n```\ncreate this file on [Desktop](file:///a/b/)";
+ expect(splitGluedClosingCodeFences(input)).toBe(input);
+ });
+
+ it('leaves content without fences untouched', () => {
+ expect(splitGluedClosingCodeFences('hello world')).toBe('hello world');
+ });
+
+ it('keeps nested markdown fences inside a block intact', () => {
+ const input = '```md\n# Example\n```python\nprint(1)\n```\n```';
+ expect(splitGluedClosingCodeFences(input)).toBe(input);
+ });
+
+ it('splits every glued closing fence when several blocks are present', () => {
+ const input = '```ts\na\n```first words\n\n```js\nb\n```second words';
+ expect(splitGluedClosingCodeFences(input)).toBe(
+ '```ts\na\n```\nfirst words\n\n```js\nb\n```\nsecond words'
+ );
+ });
+
+ it('leaves a still-open fence untouched', () => {
+ const input = '```ts\nlet foo = 1;';
+ expect(splitGluedClosingCodeFences(input)).toBe(input);
+ });
+});
--- /dev/null
+import { describe, expect, it } from 'vitest';
+import { containsCodeSpan, isOffsetInCodeBlock, tokenizeContent } from '$lib/utils';
+
+describe('tokenizeContent', () => {
+ it('tokenizes a plain text buffer with no badges', () => {
+ expect(tokenizeContent('hello world')).toEqual([{ kind: 'text', text: 'hello world' }]);
+ });
+
+ it('tokenizes a single badge', () => {
+ expect(tokenizeContent('[docs](file:///a/b)')).toEqual([
+ { kind: 'badge', name: 'docs', path: '/a/b' }
+ ]);
+ });
+
+ it('tokenizes text around a single badge', () => {
+ expect(tokenizeContent('hello [docs](file:///a/b) world')).toEqual([
+ { kind: 'text', text: 'hello ' },
+ { kind: 'badge', name: 'docs', path: '/a/b' },
+ { kind: 'text', text: ' world' }
+ ]);
+ });
+
+ it('tokenizes adjacent badges as separate tokens', () => {
+ expect(tokenizeContent('[a](file:///x)[b](file:///y)')).toEqual([
+ { kind: 'badge', name: 'a', path: '/x' },
+ { kind: 'badge', name: 'b', path: '/y' }
+ ]);
+ });
+
+ it('leaves non-file links untouched in the stream', () => {
+ expect(tokenizeContent('see [foo](https://example.com) for details')).toEqual([
+ { kind: 'text', text: 'see [foo](https://example.com) for details' }
+ ]);
+ });
+
+ it('recognizes badges whose path contains spaces (macOS screenshots)', () => {
+ const path = '/Users/allozaur/Desktop/Screenshot 2026-07-28 at 17.21.50.png';
+ const source = `[Screenshot 2026-07-28 at 17.21.50.png](file://${path}) `;
+ expect(tokenizeContent(source)).toEqual([
+ { kind: 'badge', name: 'Screenshot 2026-07-28 at 17.21.50.png', path },
+ { kind: 'text', text: ' ' }
+ ]);
+ });
+
+ it('recognizes badges whose path lives in the macOS temp folder', () => {
+ const path =
+ '/var/folders/78/j28m7pn57wb34bfjwlskh62h0000gn/T/TemporaryItems/NSIRD_screencaptureui_GD0A2R/Screenshot 2026-07-28 at 17.23.28.png';
+ const source = `[Screenshot 2026-07-28 at 17.23.28.png](file://${path}) `;
+ expect(tokenizeContent(source)).toEqual([
+ { kind: 'badge', name: 'Screenshot 2026-07-28 at 17.23.28.png', path },
+ { kind: 'text', text: ' ' }
+ ]);
+ });
+
+ it('keeps text around a badge with spaces in the path', () => {
+ const path = '/Users/allozaur/Desktop/Screenshot 2026-07-28 at 17.21.50.png';
+ const source = `see [Screenshot 2026-07-28 at 17.21.50.png](file://${path}) done`;
+ expect(tokenizeContent(source)).toEqual([
+ { kind: 'text', text: 'see ' },
+ { kind: 'badge', name: 'Screenshot 2026-07-28 at 17.21.50.png', path },
+ { kind: 'text', text: ' done' }
+ ]);
+ });
+
+ it('recognizes badges whose path contains a close parenthesis (macOS duplicate files)', () => {
+ const path = '/Users/foo/Screenshot (1).png';
+ const source = `[Screenshot (1).png](file://${path}) `;
+ expect(tokenizeContent(source)).toEqual([
+ { kind: 'badge', name: 'Screenshot (1).png', path },
+ { kind: 'text', text: ' ' }
+ ]);
+ });
+
+ it('recognizes badges whose folder name is wrapped in parentheses', () => {
+ const path = '/Users/foo/Project (Stuff)/main.rs';
+ const source = `[main.rs](file://${path}) `;
+ expect(tokenizeContent(source)).toEqual([
+ { kind: 'badge', name: 'main.rs', path },
+ { kind: 'text', text: ' ' }
+ ]);
+ });
+
+ it('recognizes adjacent badges back-to-back with no separator', () => {
+ const source = '[a](file:///p)[b](file:///q)';
+ expect(tokenizeContent(source)).toEqual([
+ { kind: 'badge', name: 'a', path: '/p' },
+ { kind: 'badge', name: 'b', path: '/q' }
+ ]);
+ });
+
+ it('tokenizes inline code with the backticks included', () => {
+ expect(tokenizeContent('run `npm test` now')).toEqual([
+ { kind: 'text', text: 'run ' },
+ { kind: 'inlineCode', text: '`npm test`' },
+ { kind: 'text', text: ' now' }
+ ]);
+ });
+
+ it('tokenizes a fenced code block without a language', () => {
+ const source = 'before\n```\nconst a = 1;\n```\nafter';
+ expect(tokenizeContent(source)).toEqual([
+ { kind: 'text', text: 'before\n' },
+ { kind: 'codeBlock', text: '```\nconst a = 1;\n```' },
+ { kind: 'text', text: '\nafter' }
+ ]);
+ });
+
+ it('tokenizes a fenced code block with a language', () => {
+ const source = '```js\nconst a = 1;\n```';
+ expect(tokenizeContent(source)).toEqual([
+ { kind: 'codeBlock', text: '```js\nconst a = 1;\n```' }
+ ]);
+ });
+
+ it('prefers the fenced block over inline spans at triple backticks', () => {
+ expect(tokenizeContent('```a``` ```b```')).toEqual([
+ { kind: 'codeBlock', text: '```a```' },
+ { kind: 'text', text: ' ' },
+ { kind: 'codeBlock', text: '```b```' }
+ ]);
+ });
+
+ it('leaves an unclosed fence as plain text', () => {
+ expect(tokenizeContent('```js\nconst a = 1;')).toEqual([
+ { kind: 'text', text: '```js\nconst a = 1;' }
+ ]);
+ });
+
+ it('leaves an unclosed inline backtick as plain text', () => {
+ expect(tokenizeContent('run `npm test')).toEqual([{ kind: 'text', text: 'run `npm test' }]);
+ });
+
+ it('does not recognize badges inside code spans', () => {
+ expect(tokenizeContent('`[a](file:///p)`')).toEqual([
+ { kind: 'inlineCode', text: '`[a](file:///p)`' }
+ ]);
+ });
+
+ it('tokenizes badges and code spans side by side', () => {
+ expect(tokenizeContent('[a](file:///p) `x`')).toEqual([
+ { kind: 'badge', name: 'a', path: '/p' },
+ { kind: 'text', text: ' ' },
+ { kind: 'inlineCode', text: '`x`' }
+ ]);
+ });
+});
+
+describe('containsCodeSpan', () => {
+ it('detects inline code', () => {
+ expect(containsCodeSpan('run `npm test` now')).toBe(true);
+ });
+
+ it('detects a fenced block with a language', () => {
+ expect(containsCodeSpan('```js\nconst a = 1;\n```')).toBe(true);
+ });
+
+ it('detects a fenced block without a language', () => {
+ expect(containsCodeSpan('```\ncode\n```')).toBe(true);
+ });
+
+ it('ignores unclosed fences and lone backticks', () => {
+ expect(containsCodeSpan('```js\nconst a = 1;')).toBe(false);
+ expect(containsCodeSpan('run `npm test')).toBe(false);
+ expect(containsCodeSpan('``')).toBe(false);
+ });
+
+ it('ignores plain text and mention links', () => {
+ expect(containsCodeSpan('hello world')).toBe(false);
+ expect(containsCodeSpan('[a](file:///p)')).toBe(false);
+ });
+});
+
+describe('isOffsetInCodeBlock', () => {
+ const BLOCK = '```js\nconst a = 1;\n```';
+
+ it('is false with no fences in the buffer', () => {
+ expect(isOffsetInCodeBlock('hello world', 5)).toBe(false);
+ expect(isOffsetInCodeBlock('run `npm test` now', 10)).toBe(false);
+ });
+
+ it('is true right after the opening fence, before any content', () => {
+ expect(isOffsetInCodeBlock('```', 3)).toBe(true);
+ expect(isOffsetInCodeBlock('```js', 5)).toBe(true);
+ });
+
+ it('is true inside a still-open block while it is being typed', () => {
+ const open = '```js\nconst a = 1;';
+ expect(isOffsetInCodeBlock(open, open.length)).toBe(true);
+ });
+
+ it('is true inside a closed block and false outside it', () => {
+ expect(isOffsetInCodeBlock(BLOCK, 6)).toBe(true);
+ expect(isOffsetInCodeBlock(BLOCK, 0)).toBe(false);
+ expect(isOffsetInCodeBlock(BLOCK, BLOCK.length)).toBe(false);
+ expect(isOffsetInCodeBlock(BLOCK + '\nafter', BLOCK.length + 5)).toBe(false);
+ });
+
+ it('toggles per fence across multiple blocks', () => {
+ const two = BLOCK + '\ntext\n' + BLOCK;
+ const secondBlock = two.lastIndexOf(BLOCK);
+ expect(isOffsetInCodeBlock(two, secondBlock - 2)).toBe(false);
+ expect(isOffsetInCodeBlock(two, secondBlock + 6)).toBe(true);
+ expect(isOffsetInCodeBlock(two, two.length)).toBe(false);
+ });
+});
--- /dev/null
+import { describe, expect, it } from 'vitest';
+import { badgeAwareWordJump, leadingBadgeEdgeOffset } from '$lib/utils';
+
+// Layout of `hello [docs](file:///a/b) world foo`:
+// "hello" 0-4, " " 5, badge 6-24 (length 19), " " 25, "world" 26-30, " " 31, "foo" 32-34
+const BADGE = '[docs](file:///a/b)';
+const SOURCE = `hello ${BADGE} world foo`;
+const BADGE_START = 6;
+const BADGE_END = 25;
+
+describe('badgeAwareWordJump', () => {
+ it('returns null when the buffer has no badge', () => {
+ expect(badgeAwareWordJump('hello world', 0, 'forward')).toBeNull();
+ expect(badgeAwareWordJump('hello world', 11, 'backward')).toBeNull();
+ });
+
+ it('jumps forward onto a badge landing at its end, not the next word', () => {
+ expect(badgeAwareWordJump(SOURCE, BADGE_START, 'forward')).toBe(BADGE_END);
+ });
+
+ it('jumps forward from the space before a badge landing at its end', () => {
+ expect(badgeAwareWordJump(SOURCE, BADGE_START - 1, 'forward')).toBe(BADGE_END);
+ });
+
+ it('jumps backward over a badge landing at its start', () => {
+ expect(badgeAwareWordJump(SOURCE, BADGE_END, 'backward')).toBe(BADGE_START);
+ });
+
+ it('jumps backward from the next word onto the badge start', () => {
+ // caret at the start of "world"
+ expect(badgeAwareWordJump(SOURCE, BADGE_END + 1, 'backward')).toBe(BADGE_START);
+ });
+
+ it('returns null for jumps that cross no badge', () => {
+ // forward over "hello" only
+ expect(badgeAwareWordJump(SOURCE, 0, 'forward')).toBeNull();
+ // backward over "foo" only
+ expect(badgeAwareWordJump(SOURCE, SOURCE.length, 'backward')).toBeNull();
+ // backward away from the badge (over "hello")
+ expect(badgeAwareWordJump(SOURCE, BADGE_START, 'backward')).toBeNull();
+ });
+
+ it('treats a leading badge as one word in both directions', () => {
+ const source = `${BADGE} rest`;
+ expect(badgeAwareWordJump(source, 0, 'forward')).toBe(BADGE.length);
+ expect(badgeAwareWordJump(source, BADGE.length, 'backward')).toBe(0);
+ });
+
+ it('treats adjacent badges as separate words', () => {
+ // each badge is 14 chars: "[a](file:///x)" / "[b](file:///y)"
+ const source = '[a](file:///x)[b](file:///y)';
+ expect(badgeAwareWordJump(source, 0, 'forward')).toBe(14);
+ expect(badgeAwareWordJump(source, 14, 'forward')).toBe(28);
+ expect(badgeAwareWordJump(source, 28, 'backward')).toBe(14);
+ expect(badgeAwareWordJump(source, 14, 'backward')).toBe(0);
+ });
+
+ it('jumps over a badge following punctuation', () => {
+ // "foo," 0-3, " " 4, badge 5-23 (end 24), " bar" 24-27
+ const source = `foo, ${BADGE} bar`;
+ expect(badgeAwareWordJump(source, 0, 'forward')).toBeNull();
+ expect(badgeAwareWordJump(source, 3, 'forward')).toBe(24);
+ });
+});
+
+describe('leadingBadgeEdgeOffset', () => {
+ it('returns 0 when the caret sits exactly at a leading badge end', () => {
+ expect(leadingBadgeEdgeOffset(`${BADGE} rest`, BADGE.length)).toBe(0);
+ });
+
+ it('returns null when the caret is anywhere else', () => {
+ expect(leadingBadgeEdgeOffset(`${BADGE} rest`, 0)).toBeNull();
+ expect(leadingBadgeEdgeOffset(`${BADGE} rest`, BADGE.length + 2)).toBeNull();
+ });
+
+ it('returns null when the buffer does not start with a badge', () => {
+ expect(leadingBadgeEdgeOffset(SOURCE, BADGE_END)).toBeNull();
+ expect(leadingBadgeEdgeOffset('', 0)).toBeNull();
+ });
+});
MENTION_BADGE_FILE_ICON_PATHS,
MENTION_BADGE_FOLDER_ICON_PATHS,
buildMentionInsertion,
+ containsFileMentionLink,
decodeFileLinkPath,
encodeFileLinkPath,
fileMentionLinkRe,
getMentionBadgeIconPaths,
- getMentionBadgeLabel,
- mentionLinkEndingAt
+ getMentionBadgeLabel
} from '$lib/utils';
import { FileMentionEntryType } from '$lib/enums';
describe('fileMentionLinkRe', () => {
it('matches a standard mention link', () => {
expect(fileMentionLinkRe().test('[docs](file:///a/b)')).toBe(true);
+ expect(containsFileMentionLink('[docs](file:///a/b)')).toBe(true);
});
it('does not match non-file links', () => {
expect(buildMentionInsertion(file('/a/b.txt', 'b.txt'), 'x', { start: 2, end: 1 })).toBeNull();
});
});
-
-describe('mentionLinkEndingAt', () => {
- const LINK = '[docs](file:///a/b)';
-
- it('returns the extent when the caret is exactly at the link end', () => {
- expect(mentionLinkEndingAt(`see ${LINK} here`, 4 + LINK.length)).toEqual({
- start: 4,
- end: 4 + LINK.length
- });
- });
-
- it('returns null when the caret is inside or past the link', () => {
- expect(mentionLinkEndingAt(LINK, LINK.length - 1)).toBeNull();
- expect(mentionLinkEndingAt(`${LINK} `, LINK.length + 1)).toBeNull();
- });
-
- it('returns null for non-file links and plain text', () => {
- expect(mentionLinkEndingAt('[foo](https://example.com)', 26)).toBeNull();
- expect(mentionLinkEndingAt('plain', 5)).toBeNull();
- });
-
- it('picks the link that ends at the caret when several exist', () => {
- const value = `${LINK} and ${LINK}`;
- expect(mentionLinkEndingAt(value, value.length)).toEqual({
- start: value.length - LINK.length,
- end: value.length
- });
- });
-});
--- /dev/null
+import { describe, expect, it } from 'vitest';
+import { SourceHistory } from '$lib/utils';
+
+describe('SourceHistory', () => {
+ it('coalesces pushes inside the group window into one undo step', () => {
+ const h = new SourceHistory(100, 800);
+ h.push({ value: '', caret: 0 }, 1000);
+ h.push({ value: 'a', caret: 1 }, 1200);
+ h.push({ value: 'ab', caret: 2 }, 1500);
+
+ expect(h.undo({ value: 'abc', caret: 3 })).toEqual({ value: '', caret: 0 });
+ expect(h.undo({ value: '', caret: 0 })).toBeNull();
+ });
+
+ it('starts a new group once the window has passed', () => {
+ const h = new SourceHistory(100, 800);
+ h.push({ value: '', caret: 0 }, 1000);
+ h.push({ value: 'abc', caret: 3 }, 2000);
+
+ expect(h.undo({ value: 'abcdef', caret: 6 })).toEqual({ value: 'abc', caret: 3 });
+ expect(h.undo({ value: 'abc', caret: 3 })).toEqual({ value: '', caret: 0 });
+ });
+
+ it('newGroup forces a separate entry even inside the window', () => {
+ const h = new SourceHistory(100, 800);
+ h.push({ value: '', caret: 0 }, 1000);
+ h.push({ value: 'abc', caret: 3 }, 1100, true);
+
+ expect(h.undo({ value: 'abc\n', caret: 4 })).toEqual({ value: 'abc', caret: 3 });
+ expect(h.undo({ value: 'abc', caret: 3 })).toEqual({ value: '', caret: 0 });
+ });
+
+ it('redo round-trips and a fresh push clears the redo stack', () => {
+ const h = new SourceHistory(100, 800);
+ h.push({ value: '', caret: 0 }, 1000);
+
+ const undone = h.undo({ value: 'abc', caret: 3 });
+ expect(undone).toEqual({ value: '', caret: 0 });
+ expect(h.redo({ value: '', caret: 0 })).toEqual({ value: 'abc', caret: 3 });
+
+ h.undo({ value: 'abc', caret: 3 });
+ h.push({ value: '', caret: 0 }, 5000);
+ expect(h.redo({ value: 'x', caret: 1 })).toBeNull();
+ });
+
+ it('starts a new group on the first edit after an undo', () => {
+ const h = new SourceHistory(100, 800);
+ h.push({ value: '', caret: 0 }, 1000);
+ h.undo({ value: 'abc', caret: 3 });
+
+ h.push({ value: '', caret: 0 }, 1200);
+ expect(h.undo({ value: 'x', caret: 1 })).toEqual({ value: '', caret: 0 });
+ });
+
+ it('evicts the oldest entry past the limit', () => {
+ const h = new SourceHistory(2, 800);
+ h.push({ value: 'one', caret: 0 }, 1000);
+ h.push({ value: 'two', caret: 0 }, 2000);
+ h.push({ value: 'three', caret: 0 }, 3000);
+
+ expect(h.undo({ value: 'cur', caret: 0 })).toEqual({ value: 'three', caret: 0 });
+ expect(h.undo({ value: 'three', caret: 0 })).toEqual({ value: 'two', caret: 0 });
+ expect(h.undo({ value: 'two', caret: 0 })).toBeNull();
+ });
+});
overview / pkg / ggml / sources / llama.cpp / commitdiff