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refactor(assistant-ui): enhance mention chip handling and editor focus behavior

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This commit is contained in:
Anish Sarkar 2026-05-12 23:18:45 +05:30
parent 0c2beb7ce8
commit 2437716752
2 changed files with 215 additions and 134 deletions
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241
surfsense_web/components/assistant-ui/inline-mention-editor.tsx
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@ -1,6 +1,7 @@
"use client";
import { Folder as FolderIcon, X as XIcon } from "lucide-react";
import type { NodeEntry, TElement } from "platejs";
import type { PlateElementProps } from "platejs/react";
import {
createPlatePlugin,
@ -56,10 +57,7 @@ export interface InlineMentionEditorRef {
setText: (text: string) => void;
getText: () => string;
getMentionedDocuments: () => MentionedDocument[];
insertMentionChip: (
mention: MentionChipInput,
options?: { removeTriggerText?: boolean }
) => void;
insertMentionChip: (mention: MentionChipInput, options?: { removeTriggerText?: boolean }) => void;
/**
* @deprecated Use ``insertMentionChip``. Kept for one transition
* cycle so we don't break ad-hoc callers; prefer the new name.
@ -338,17 +336,21 @@ export const InlineMentionEditor = forwardRef<InlineMentionEditorRef, InlineMent
value: initialText ? toValueFromText(initialText) : EMPTY_VALUE,
});
// Move the caret to the end of the document and focus the editor.
// Routes through Plate's transforms so ``editor.selection`` and
// the DOM selection stay in sync — bypassing Plate (via raw
// ``window.getSelection``) was the prior implementation and is
// what made the caret disappear after every ``setValue``-based
// mutation. Falls back to DOM focus if Plate's API throws (e.g.
// during a transient unmount race).
const focusAtEnd = useCallback(() => {
const el = editableRef.current;
if (!el) return;
el.focus();
const selection = window.getSelection();
const range = document.createRange();
range.selectNodeContents(el);
range.collapse(false);
selection?.removeAllRanges();
selection?.addRange(range);
}, []);
try {
editor.tf.select(editor.api.end([]));
editor.tf.focus();
} catch {
editableRef.current?.focus();
}
}, [editor]);
const getCurrentValue = useCallback(
() => (editor.children as ComposerValue) ?? EMPTY_VALUE,
@ -396,17 +398,30 @@ export const InlineMentionEditor = forwardRef<InlineMentionEditorRef, InlineMent
[editor, emitState]
);
// Insert a mention chip at the current caret. Uses Plate
// transforms so Slate keeps the editor selection valid through
// the edit.
//
// Critical detail: the chip is a void inline element. Inserting
// it on its own with ``{ select: true }`` would land the caret
// inside the void's empty ``children: [{ text: "" }]`` — a point
// the browser can't render a caret on, which is what made the
// cursor disappear or jump to the wrong side of the chip after
// insertion. Inserting ``[mentionNode, { text: " " }]`` as a
// single array means the *last* inserted node is a text node, so
// ``{ select: true }`` resolves to that text node's end (offset
// 1, after the trailing space) — a real, renderable text point.
// The whole sequence stays inside ``withoutNormalizing`` so the
// optional trigger-text delete and the chip insert show up as a
// single undo step.
const insertMentionChip = useCallback(
(mention: MentionChipInput, options?: { removeTriggerText?: boolean }) => {
if (typeof mention.id !== "number" || typeof mention.title !== "string") return;
const removeTriggerText = options?.removeTriggerText ?? true;
const current = getCurrentValue();
const selection = editor.selection;
const kind: MentionKind = mention.kind ?? "doc";
const document_type =
mention.document_type ??
(kind === "folder" ? FOLDER_MENTION_DOCUMENT_TYPE : undefined);
mention.document_type ?? (kind === "folder" ? FOLDER_MENTION_DOCUMENT_TYPE : undefined);
const mentionNode: MentionElementNode = {
type: MENTION_TYPE,
id: mention.id,
@ -416,60 +431,49 @@ export const InlineMentionEditor = forwardRef<InlineMentionEditorRef, InlineMent
children: [{ text: "" }],
};
const cursorCtx = getCursorTextContext(current, selection);
if (!cursorCtx) {
const lastBlock = current[current.length - 1] ?? { type: "p", children: [{ text: "" }] };
const appended: ComposerValue = [
...current.slice(0, -1),
{
...lastBlock,
children: [...lastBlock.children, mentionNode, { text: " " }],
},
];
setValue(appended);
requestAnimationFrame(focusAtEnd);
return;
}
editor.tf.withoutNormalizing(() => {
const selection = editor.selection;
const block = current[cursorCtx.blockIndex];
const currentChild = getTextNode(block.children[cursorCtx.childIndex]);
if (!currentChild) {
const children = [...block.children];
children.splice(cursorCtx.childIndex + 1, 0, mentionNode, { text: " " });
const next = [...current];
next[cursorCtx.blockIndex] = { ...block, children };
setValue(next as ComposerValue);
requestAnimationFrame(focusAtEnd);
return;
}
const text = currentChild.text;
let removeStart = cursorCtx.cursor;
if (removeTriggerText) {
for (let i = cursorCtx.cursor - 1; i >= 0; i--) {
if (text[i] === "@") {
removeStart = i;
break;
// No active editor selection — typically because focus
// moved to a picker/dropdown. Snap the caret to the end
// of the document so the chip appends cleanly instead
// of disappearing into a dead range.
if (!selection) {
editor.tf.select(editor.api.end([]));
} else if (removeTriggerText) {
// Delete the in-progress "@query" text so the chip
// stands in for it. Mirrors the old splice but lets
// Slate keep selection sane through the edit.
const cursorCtx = getCursorTextContext(getCurrentValue(), selection);
if (cursorCtx) {
const text = cursorCtx.text;
let triggerIndex = -1;
for (let i = cursorCtx.cursor - 1; i >= 0; i--) {
if (text[i] === "@") {
triggerIndex = i;
break;
}
if (text[i] === " " || text[i] === "\n") break;
}
if (triggerIndex >= 0 && triggerIndex < cursorCtx.cursor) {
const path = [cursorCtx.blockIndex, cursorCtx.childIndex];
editor.tf.delete({
at: {
anchor: { path, offset: triggerIndex },
focus: { path, offset: cursorCtx.cursor },
},
});
}
}
if (text[i] === " " || text[i] === "\n") break;
}
}
const before = text.slice(0, removeStart);
const after = text.slice(cursorCtx.cursor);
const replacement: ComposerNode[] = [];
if (before.length > 0) replacement.push({ text: before });
replacement.push(mentionNode);
replacement.push({ text: ` ${after}` });
const children = [...block.children];
children.splice(cursorCtx.childIndex, 1, ...replacement);
const next = [...current];
next[cursorCtx.blockIndex] = { ...block, children };
setValue(next as ComposerValue);
requestAnimationFrame(focusAtEnd);
editor.tf.insertNodes([mentionNode, { text: " " }] as unknown as TElement[], {
select: true,
});
});
editor.tf.focus();
},
[editor.selection, focusAtEnd, getCurrentValue, setValue]
[editor, getCurrentValue]
);
// Backwards-compatible shim — pre-folder callers pass a doc-only
@ -485,24 +489,34 @@ export const InlineMentionEditor = forwardRef<InlineMentionEditorRef, InlineMent
[insertMentionChip]
);
// Remove the chip(s) matching the given (id, document_type) pair.
// Goes through ``tf.removeNodes`` so Slate keeps the surrounding
// selection valid — the previous ``setValue``-based filter wiped
// selection on every removal, which is why the caret vanished
// when the X button was clicked. Iterates descending so removing
// one entry doesn't invalidate the path of subsequent matches.
// In practice chips are deduped by ``getMentionDocKey`` so this
// loop runs at most once; the descending iteration is defense
// against any future divergence.
const removeDocumentChip = useCallback(
(docId: number, docType?: string) => {
const current = getCurrentValue();
let changed = false;
const next = current.map((block) => {
const children = block.children.filter((node) => {
if (!isMentionNode(node)) return true;
const match =
node.id === docId && (node.document_type ?? "UNKNOWN") === (docType ?? "UNKNOWN");
if (match) changed = true;
return !match;
});
return { ...block, children: children.length ? children : [{ text: "" }] };
const match = (n: unknown) => {
if (!n || typeof n !== "object" || !("type" in n)) return false;
const node = n as MentionElementNode;
if (node.type !== MENTION_TYPE) return false;
if (node.id !== docId) return false;
return (node.document_type ?? "UNKNOWN") === (docType ?? "UNKNOWN");
};
const entries = Array.from(editor.api.nodes({ at: [], match })) as NodeEntry[];
if (entries.length === 0) return;
editor.tf.withoutNormalizing(() => {
for (const [, path] of entries.reverse()) {
editor.tf.removeNodes({ at: path });
}
});
if (!changed) return;
setValue(next as ComposerValue);
},
[getCurrentValue, setValue]
[editor]
);
// Combined "remove chip end-to-end" used by both the Backspace
@ -517,6 +531,11 @@ export const InlineMentionEditor = forwardRef<InlineMentionEditorRef, InlineMent
[onDocumentRemove, removeDocumentChip]
);
// Update the streaming status on a chip in place. ``tf.setNodes``
// merges the partial props onto every node matching the
// predicate without rebuilding the document, so the user's
// selection stays put — important because status transitions
// arrive as backend events while the user may be mid-typing.
const setDocumentChipStatus = useCallback(
(
docId: number,
@ -524,31 +543,33 @@ export const InlineMentionEditor = forwardRef<InlineMentionEditorRef, InlineMent
statusLabel: string | null,
statusKind: MentionStatusKind = "pending"
) => {
const current = getCurrentValue();
let changed = false;
const next = current.map((block) => ({
...block,
children: block.children.map((node) => {
if (!isMentionNode(node)) return node;
const sameType = (node.document_type ?? "UNKNOWN") === (docType ?? "UNKNOWN");
if (node.id !== docId || !sameType) return node;
changed = true;
return {
...node,
statusLabel,
statusKind: statusLabel ? statusKind : undefined,
};
}),
}));
if (!changed) return;
setValue(next as ComposerValue);
const match = (n: unknown) => {
if (!n || typeof n !== "object" || !("type" in n)) return false;
const node = n as MentionElementNode;
if (node.type !== MENTION_TYPE) return false;
if (node.id !== docId) return false;
return (node.document_type ?? "UNKNOWN") === (docType ?? "UNKNOWN");
};
editor.tf.setNodes(
{
statusLabel,
statusKind: statusLabel ? statusKind : undefined,
} as Partial<TElement>,
{ at: [], match }
);
},
[getCurrentValue, setValue]
[editor]
);
const clear = useCallback(() => {
setValue(EMPTY_VALUE);
}, [setValue]);
// ``tf.setValue`` (inside ``setValue``) wipes the editor's
// selection — without this, after the user presses Enter to
// submit, the composer is left with no caret and they would
// have to click before typing again.
requestAnimationFrame(focusAtEnd);
}, [focusAtEnd, setValue]);
const setText = useCallback(
(text: string) => {
@ -567,7 +588,22 @@ export const InlineMentionEditor = forwardRef<InlineMentionEditorRef, InlineMent
useImperativeHandle(
ref,
() => ({
focus: () => editableRef.current?.focus(),
// If we already have a Plate selection (user was typing
// before focus left), preserve it — just refocus. If we
// don't (first mount, or focus was lost without a
// surviving selection), seed a selection at end-of-doc
// so the contentEditable shows a caret instead of an
// invisible focus ring.
focus: () => {
try {
if (!editor.selection) {
editor.tf.select(editor.api.end([]));
}
editor.tf.focus();
} catch {
editableRef.current?.focus();
}
},
clear,
setText,
getText,
@ -579,6 +615,7 @@ export const InlineMentionEditor = forwardRef<InlineMentionEditorRef, InlineMent
}),
[
clear,
editor,
getMentionedDocs,
getText,
insertMentionChip,