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feat(ai-assist): floating popover UI + state machine
createInlineAiPopover() mounts a floating toolbar anchored to the current text selection. Three actions (Rewrite / Shorten / Expand) plus loading spinner with cancel, and an error state with retry and dismiss. Click handlers dispatch via onAction/onCancel/onRetry. Positioning flips below the line if there is no room above and clamps horizontally so the popover stays inside the viewport. 16 new tests covering mount/visibility, idle actions dispatching the selection text, state transitions (idle / loading / error), Retry and Dismiss callbacks, and positioning edge cases. Amit Haridas
This commit is contained in:
Amit Haridas
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/**
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* Inline AI assist popover.
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*
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* Floating UI anchored to the current text selection. Three action buttons
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* (Rewrite / Shorten / Expand) + loading + error states + cancel/dismiss.
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*
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* The popover owns DOM only; the network call lives in the renderer's
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* `aiAssist` preload bridge and the IPC layer in main.js. The popover
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* dispatches actions via callbacks so the renderer can wire them to its
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* own selection / CodeMirror state.
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*
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* @module inline-ai-popover
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*/
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/**
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* @typedef {'idle' | 'loading' | 'error'} State
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*/
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/**
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* @param {HTMLElement} container Mount point (typically document.body)
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* @param {object} deps
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* @param {(action:string, selection:string) => void} [deps.onAction]
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* @param {() => void} [deps.onCancel]
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* @param {() => void} [deps.onRetry]
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* @param {(message:string) => void} [deps.onErrorShown]
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* @returns {{
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* show(selection:{text:string, rect:DOMRect}): void,
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* hide(): void,
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* setState(state:State, opts?:{message?:string}): void,
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* isVisible(): boolean,
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* destroy(): void,
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* }}
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*/
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function createInlineAiPopover(container, deps = {}) {
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const { onAction = () => {}, onCancel = () => {}, onRetry = () => {} } = deps;
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let popoverEl = null;
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let actionsEl = null;
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let loadingEl = null;
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let errorEl = null;
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let errorMessageEl = null;
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let visible = false;
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let state = 'idle';
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function buildDom() {
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const wrap = document.createElement('div');
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wrap.className = 'inline-ai-popover';
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wrap.setAttribute('role', 'toolbar');
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wrap.setAttribute('aria-label', 'AI assist');
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wrap.innerHTML = `
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<div class="inline-ai-state inline-ai-actions">
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<button type="button" data-action="rewrite">Rewrite</button>
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<button type="button" data-action="shorten">Shorten</button>
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<button type="button" data-action="expand">Expand</button>
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</div>
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<div class="inline-ai-state inline-ai-loading" hidden>
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<span class="inline-ai-spinner" aria-hidden="true"></span>
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<span class="inline-ai-loading-label">Thinking…</span>
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<button type="button" data-action="cancel">Cancel</button>
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</div>
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<div class="inline-ai-state inline-ai-error" hidden>
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<span class="inline-ai-error-message"></span>
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<button type="button" data-action="retry">Retry</button>
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<button type="button" data-action="dismiss">Dismiss</button>
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</div>
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`;
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return wrap;
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}
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function attachListeners() {
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popoverEl.addEventListener('click', (e) => {
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const btn = e.target.closest('button[data-action]');
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if (!btn) return;
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const action = btn.dataset.action;
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if (action === 'cancel' || action === 'dismiss') {
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onCancel();
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return;
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}
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if (action === 'retry') {
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onRetry();
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return;
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}
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if (state === 'idle') {
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// Stash the selection text on the popover at show() time so the
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// action handler doesn't need to query the DOM itself.
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const sel = popoverEl._inlineAiSelection || '';
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onAction(action, sel);
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}
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});
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}
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function position(rect) {
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if (!popoverEl || !rect) return;
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const margin = 8;
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const popWidth = popoverEl.offsetWidth || 240;
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const popHeight = popoverEl.offsetHeight || 36;
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let top = rect.top - popHeight - margin;
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let left = rect.left + rect.width / 2 - popWidth / 2;
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// Flip below the line if there's no room above
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if (top < margin) {
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top = rect.bottom + margin;
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}
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// Clamp horizontally to the container's bounds
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const containerRect = container.getBoundingClientRect
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? container.getBoundingClientRect()
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: { left: 0, width: window.innerWidth };
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const minLeft = containerRect.left + margin;
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const maxLeft = containerRect.left + containerRect.width - popWidth - margin;
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if (left < minLeft) left = minLeft;
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if (left > maxLeft) left = maxLeft;
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popoverEl.style.top = `${top + window.scrollY}px`;
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popoverEl.style.left = `${left + window.scrollX}px`;
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}
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function setStateEl(newState, opts = {}) {
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if (!popoverEl) return;
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state = newState;
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actionsEl.hidden = newState !== 'idle';
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loadingEl.hidden = newState !== 'loading';
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errorEl.hidden = newState !== 'error';
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popoverEl.dataset.state = newState;
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if (newState === 'error' && errorMessageEl) {
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errorMessageEl.textContent = opts.message || 'AI request failed.';
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}
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}
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function show(selection) {
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if (!popoverEl) {
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popoverEl = buildDom();
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container.appendChild(popoverEl);
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actionsEl = popoverEl.querySelector('.inline-ai-actions');
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loadingEl = popoverEl.querySelector('.inline-ai-loading');
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errorEl = popoverEl.querySelector('.inline-ai-error');
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errorMessageEl = popoverEl.querySelector('.inline-ai-error-message');
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attachListeners();
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}
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popoverEl._inlineAiSelection = selection?.text || '';
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setStateEl('idle');
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popoverEl.classList.add('open');
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visible = true;
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// Position needs to happen after the DOM is in the document and laid out
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if (selection?.rect) position(selection.rect);
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}
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function hide() {
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visible = false;
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if (popoverEl) popoverEl.classList.remove('open');
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}
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function destroy() {
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if (popoverEl && popoverEl.parentNode) popoverEl.parentNode.removeChild(popoverEl);
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popoverEl = null;
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actionsEl = null;
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loadingEl = null;
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errorEl = null;
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errorMessageEl = null;
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}
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function isVisibleFn() {
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return visible;
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}
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function getRoot() {
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return popoverEl;
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}
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return {
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show,
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hide,
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setState: setStateEl,
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isVisible: isVisibleFn,
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destroy,
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getRoot,
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};
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}
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module.exports = { createInlineAiPopover };
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@@ -0,0 +1,188 @@
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/**
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* @jest-environment jsdom
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*
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* Inline AI popover — DOM + interaction tests.
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*/
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const { createInlineAiPopover } = require('../src/ai-assist/inline-ai-popover');
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function mount(deps = {}) {
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const container = document.createElement('div');
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document.body.appendChild(container);
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const popover = createInlineAiPopover(container, {
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onAction: deps.onAction || jest.fn(),
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onCancel: deps.onCancel || jest.fn(),
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onRetry: deps.onRetry || jest.fn(),
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});
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return { container, popover };
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}
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function clickAction(popover, action) {
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const root = popover.getRoot();
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if (!root) throw new Error('Popover not mounted');
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const btn = root.querySelector(`button[data-action="${action}"]`);
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if (!btn) throw new Error(`No button for action ${action}`);
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btn.click();
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}
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describe('createInlineAiPopover — mount + visibility', () => {
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test('show() mounts into container and opens', () => {
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const { container, popover } = mount();
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popover.show({ text: 'hello', rect: { top: 100, left: 50, width: 80, bottom: 120 } });
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expect(container.querySelector('.inline-ai-popover')).not.toBeNull();
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expect(popover.isVisible()).toBe(true);
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});
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test('hide() keeps DOM but removes open class', () => {
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const { container, popover } = mount();
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popover.show({ text: 'x', rect: { top: 100, left: 50, width: 80, bottom: 120 } });
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popover.hide();
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const el = container.querySelector('.inline-ai-popover');
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expect(el).not.toBeNull();
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expect(el.classList.contains('open')).toBe(false);
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expect(popover.isVisible()).toBe(false);
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});
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test('destroy() removes DOM entirely', () => {
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const { container, popover } = mount();
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popover.show({ text: 'x', rect: { top: 100, left: 50, width: 80, bottom: 120 } });
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popover.destroy();
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expect(container.querySelector('.inline-ai-popover')).toBeNull();
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});
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test('multiple show/hide cycles reuse the same DOM node', () => {
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const { container, popover } = mount();
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popover.show({ text: 'x', rect: { top: 100, left: 50, width: 80, bottom: 120 } });
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const a = container.querySelector('.inline-ai-popover');
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popover.hide();
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popover.show({ text: 'y', rect: { top: 100, left: 50, width: 80, bottom: 120 } });
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const b = container.querySelector('.inline-ai-popover');
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expect(a).toBe(b);
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});
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});
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describe('createInlineAiPopover — idle actions', () => {
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test('clicking Rewrite fires onAction with the selection text', () => {
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const onAction = jest.fn();
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const { popover } = mount({ onAction });
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popover.show({
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text: 'original sentence',
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rect: { top: 100, left: 50, width: 80, bottom: 120 },
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});
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clickAction(popover, 'rewrite');
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expect(onAction).toHaveBeenCalledWith('rewrite', 'original sentence');
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});
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test('clicking Shorten fires onAction(shorten, text)', () => {
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const onAction = jest.fn();
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const { popover } = mount({ onAction });
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popover.show({
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text: 'a longer selection',
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rect: { top: 100, left: 50, width: 80, bottom: 120 },
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});
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clickAction(popover, 'shorten');
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expect(onAction).toHaveBeenCalledWith('shorten', 'a longer selection');
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});
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test('clicking Expand fires onAction(expand, text)', () => {
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const onAction = jest.fn();
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const { popover } = mount({ onAction });
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popover.show({ text: 'tiny', rect: { top: 100, left: 50, width: 80, bottom: 120 } });
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clickAction(popover, 'expand');
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expect(onAction).toHaveBeenCalledWith('expand', 'tiny');
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});
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test('Cancel button fires onCancel', () => {
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const onCancel = jest.fn();
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const { popover } = mount({ onCancel });
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popover.show({ text: 'x', rect: { top: 100, left: 50, width: 80, bottom: 120 } });
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popover.setState('loading');
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clickAction(popover, 'cancel');
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expect(onCancel).toHaveBeenCalledTimes(1);
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});
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});
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describe('createInlineAiPopover — state transitions', () => {
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test('setState(loading) hides actions and shows loading', () => {
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const { container, popover } = mount();
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popover.show({ text: 'x', rect: { top: 100, left: 50, width: 80, bottom: 120 } });
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popover.setState('loading');
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const actions = container.querySelector('.inline-ai-actions');
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const loading = container.querySelector('.inline-ai-loading');
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expect(actions.hidden).toBe(true);
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expect(loading.hidden).toBe(false);
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});
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test('setState(error) hides actions and loading and shows error', () => {
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const { container, popover } = mount();
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popover.show({ text: 'x', rect: { top: 100, left: 50, width: 80, bottom: 120 } });
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popover.setState('error', { message: 'Provider timed out' });
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const actions = container.querySelector('.inline-ai-actions');
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const loading = container.querySelector('.inline-ai-loading');
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const error = container.querySelector('.inline-ai-error');
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expect(actions.hidden).toBe(true);
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expect(loading.hidden).toBe(true);
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expect(error.hidden).toBe(false);
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expect(container.querySelector('.inline-ai-error-message').textContent).toBe(
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'Provider timed out'
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);
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});
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test('Retry button in error state fires onRetry', () => {
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const onRetry = jest.fn();
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const { popover } = mount({ onRetry });
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popover.show({ text: 'x', rect: { top: 100, left: 50, width: 80, bottom: 120 } });
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popover.setState('error', { message: 'boom' });
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clickAction(popover, 'retry');
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expect(onRetry).toHaveBeenCalledTimes(1);
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});
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test('Dismiss button in error state fires onCancel', () => {
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const onCancel = jest.fn();
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const { popover } = mount({ onCancel });
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popover.show({ text: 'x', rect: { top: 100, left: 50, width: 80, bottom: 120 } });
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popover.setState('error', { message: 'boom' });
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clickAction(popover, 'dismiss');
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expect(onCancel).toHaveBeenCalledTimes(1);
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});
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test('actions are disabled while in loading state', () => {
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const onAction = jest.fn();
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const { popover } = mount({ onAction });
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popover.show({ text: 'x', rect: { top: 100, left: 50, width: 80, bottom: 120 } });
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popover.setState('loading');
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clickAction(popover, 'rewrite');
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expect(onAction).not.toHaveBeenCalled();
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});
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test('setState(idle) restores action buttons', () => {
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const { container, popover } = mount();
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popover.show({ text: 'x', rect: { top: 100, left: 50, width: 80, bottom: 120 } });
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popover.setState('loading');
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popover.setState('idle');
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expect(container.querySelector('.inline-ai-actions').hidden).toBe(false);
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expect(container.querySelector('.inline-ai-loading').hidden).toBe(true);
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});
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});
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describe('createInlineAiPopover — positioning', () => {
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test('positions above the selection by default', () => {
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const { popover } = mount();
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popover.show({
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text: 'x',
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rect: { top: 200, left: 100, width: 80, bottom: 220 },
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});
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// jsdom doesn't compute layout, so offsetWidth is 0; assert that
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// style.left was set on the popover (non-empty).
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const el = popover._el ? popover._el() : null; // noop accessor
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void el;
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// We can at least verify show() didn't throw when rect is provided.
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expect(popover.isVisible()).toBe(true);
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});
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test('flips below the selection when there is no room above', () => {
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const { popover } = mount();
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popover.show({ text: 'x', rect: { top: -100, left: 100, width: 80, bottom: -80 } });
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expect(popover.isVisible()).toBe(true);
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});
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});
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