loop/webui: swtich to web components impl (#1)
* loop/webui: swtich to web components impl
This change reorganizes the original vibe-coded
frontend code into a structure that's much
easier for a human to read and reason about,
while retaining the user-visible functionality
of its vibe-coded predecessor. Perhaps most
importantly, this change makes the code testable.
Some other notable details:
This does not use any of the popular large web
frameworks, but instead follows more of an
"a la carte" approach: leverage features
that already exist in modern web browsers,
like custom elements and shadow DOM.
Templating and basic component lifecycle
management are provided by lit.
State management is nothing fancy. It
doesn't use any library or framework, just
a basic "Events up, properties down"
approach.
* fix bad esbuild.go merge
* loop/webui: don't bundle src/web-components/demo
* loop/webui: don't 'npm ci' dev deps in the container
* rebase to main, undo README.md changes, add webuil.Build() call to LaunchContainer()
diff --git a/loop/webui/src/web-components/sketch-timeline.ts b/loop/webui/src/web-components/sketch-timeline.ts
new file mode 100644
index 0000000..8122db7
--- /dev/null
+++ b/loop/webui/src/web-components/sketch-timeline.ts
@@ -0,0 +1,127 @@
+import {css, html, LitElement} from 'lit';
+import {repeat} from 'lit/directives/repeat.js';
+import {customElement, property} from 'lit/decorators.js';
+import {State, TimelineMessage} from '../types';
+import './sketch-timeline-message'
+
+@customElement('sketch-timeline')
+export class SketchTimeline extends LitElement {
+ @property()
+ messages: TimelineMessage[] = [];
+
+ // See https://lit.dev/docs/components/styles/ for how lit-element handles CSS.
+ // Note that these styles only apply to the scope of this web component's
+ // shadow DOM node, so they won't leak out or collide with CSS declared in
+ // other components or the containing web page (...unless you want it to do that).
+ static styles = css`
+ /* Hide views initially to prevent flash of content */
+ .timeline-container .timeline,
+ .timeline-container .diff-view,
+ .timeline-container .chart-view,
+ .timeline-container .terminal-view {
+ visibility: hidden;
+ }
+
+ /* Will be set by JavaScript once we know which view to display */
+ .timeline-container.view-initialized .timeline,
+ .timeline-container.view-initialized .diff-view,
+ .timeline-container.view-initialized .chart-view,
+ .timeline-container.view-initialized .terminal-view {
+ visibility: visible;
+ }
+
+ .timeline-container {
+ width: 100%;
+ position: relative;
+ }
+
+ /* Timeline styles that should remain unchanged */
+ .timeline {
+ position: relative;
+ margin: 10px 0;
+ scroll-behavior: smooth;
+ }
+
+ .timeline::before {
+ content: "";
+ position: absolute;
+ top: 0;
+ bottom: 0;
+ left: 15px;
+ width: 2px;
+ background: #e0e0e0;
+ border-radius: 1px;
+ }
+
+ /* Hide the timeline vertical line when there are no messages */
+ .timeline.empty::before {
+ display: none;
+ }
+ `;
+
+ constructor() {
+ super();
+
+ // Binding methods
+ this._handleShowCommitDiff = this._handleShowCommitDiff.bind(this);
+ }
+
+ /**
+ * Handle showCommitDiff event
+ */
+ private _handleShowCommitDiff(event: CustomEvent) {
+ const { commitHash } = event.detail;
+ if (commitHash) {
+ // Bubble up the event to the app shell
+ const newEvent = new CustomEvent('show-commit-diff', {
+ detail: { commitHash },
+ bubbles: true,
+ composed: true
+ });
+ this.dispatchEvent(newEvent);
+ }
+ }
+
+ // See https://lit.dev/docs/components/lifecycle/
+ connectedCallback() {
+ super.connectedCallback();
+
+ // Listen for showCommitDiff events from the renderer
+ document.addEventListener('showCommitDiff', this._handleShowCommitDiff as EventListener);
+ }
+
+ // See https://lit.dev/docs/components/lifecycle/
+ disconnectedCallback() {
+ super.disconnectedCallback();
+
+ // Remove event listeners
+ document.removeEventListener('showCommitDiff', this._handleShowCommitDiff as EventListener);
+ }
+
+ messageKey(message: TimelineMessage): string {
+ // If the message has tool calls, and any of the tool_calls get a response, we need to
+ // re-render that message.
+ const toolCallResponses = message.tool_calls?.filter((tc)=>tc.result_message).map((tc)=>tc.tool_call_id).join('-');
+ return `message-${message.idx}-${toolCallResponses}`;
+ }
+
+ render() {
+ return html`
+ <div class="timeline-container">
+ ${repeat(this.messages, this.messageKey, (message, index) => {
+ let previousMessage: TimelineMessage;
+ if (index > 0) {
+ previousMessage = this.messages[index-1];
+ }
+ return html`<sketch-timeline-message .message=${message} .previousMessage=${previousMessage}></sketch-timeline-message>`;
+ })}
+ </div>
+ `;
+ }
+}
+
+declare global {
+ interface HTMLElementTagNameMap {
+ "sketch-timeline": SketchTimeline;
+ }
+}
\ No newline at end of file