Refactor: Move DOM/UI helpers

src/app/dom.js

@@ -0,0 +1,83 @@
+export const ELEMENT_IDS = [
+  'setup-screen', 'main-screen', 'setup-key', 'setup-save',
+  'btn-settings', 'modal-settings', 'modal-key', 'modal-save', 'btn-close-modal',
+  'sel-model', 'inp-prompt', 'inp-frames', 'inp-fps', 'sel-size', 'sel-ratio',
+  'btn-generate', 'progress-area', 'progress-bar', 'progress-text', 'frames-preview',
+  'result-area', 'result-gif', 'btn-download'
+];
+
+const camelize = (id) => id.replace(/-([a-z])/g, (_, c) => c.toUpperCase());
+
+export function grabElements(ids = ELEMENT_IDS) {
+  const el = {};
+  for (const id of ids) {
+    const key = camelize(id);
+    el[key] = document.getElementById(id);
+    if (!el[key]) console.warn(`vibegif: missing element #${id}`);
+  }
+  return el;
+}
+
+export function show(node) {
+  if (!node) return;
+  node.classList.remove('hidden');
+  node.style.display = '';
+}
+
+export function hide(node) {
+  if (!node) return;
+  node.classList.add('hidden');
+  node.style.display = '';
+}
+
+export function setProgress(el, pct, text) {
+  show(el.progressArea);
+  if (el.progressBar) el.progressBar.style.width = `${Math.max(0, Math.min(100, pct))}%`;
+  if (el.progressText) el.progressText.textContent = text || '';
+}
+
+export function resetProgress(el) {
+  hide(el.progressArea);
+  if (el.progressBar) el.progressBar.style.width = '0%';
+  if (el.progressText) el.progressText.textContent = '';
+  if (el.framesPreview) el.framesPreview.innerHTML = '';
+}
+
+export function addFramePreview(el, src, index) {
+  if (!el.framesPreview) return;
+  const img = document.createElement('img');
+  img.src = src;
+  img.className = 'w-16 h-16 rounded-lg border border-neutral-200 object-cover';
+  img.title = `frame ${index + 1}`;
+  el.framesPreview.appendChild(img);
+}
+
+export function showResult(el, blobUrl) {
+  if (el.resultArea) {
+    el.resultArea.classList.remove('hidden');
+    el.resultArea.style.display = 'flex';
+  }
+  if (el.resultGif) el.resultGif.src = blobUrl;
+  if (el.btnDownload) el.btnDownload.href = blobUrl;
+}
+
+export function hideResult(el) {
+  if (!el.resultArea) return;
+  el.resultArea.classList.add('hidden');
+  el.resultArea.style.display = '';
+}
+
+export function setGenerating(el, active) {
+  if (!el.btnGenerate) return;
+  el.btnGenerate.disabled = !!active;
+  el.btnGenerate.style.opacity = active ? '0.5' : '1';
+  el.btnGenerate.style.cursor = active ? 'not-allowed' : 'pointer';
+}
+
+export function syncSizeByModel(el) {
+  if (!el.selModel || !el.selSize) return;
+  const isGemini = el.selModel.value.startsWith('google/');
+  const opt05 = el.selSize.querySelector('option[value="0.5K"]');
+  if (opt05) opt05.disabled = !isGemini;
+  if (!isGemini && el.selSize.value === '0.5K') el.selSize.value = '1K';
+}