Build menu: hover popup with full info, top-left card hidden while building

The short description row became a status row for the selected piece
(variant, Replace, ghosts, messages). Gamepad shows the selected tile's popup.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/ui/build-menu.js

@@ -28,7 +28,7 @@ const PIECE_ICONS = {
 };
 function pieceIcon(id) { return `<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.6" stroke-linejoin="round" stroke-linecap="round" aria-hidden="true">${PIECE_ICONS[id] || ''}</svg>`; }
 function catOf(id) { const c = BUILD_CATS.findIndex(([, ids]) => ids.includes(id)); return c < 0 ? 0 : c; }
-let lastBuildKey = '';
+let lastBuildKey = '', lastBuildMenu = '';
 function selectBuildCat(c) {
   GAME.buildCat = c;
   const ids = BUILD_CATS[c][1], keep = GAME.catPick && GAME.catPick[c];
@@ -43,15 +43,16 @@ function cycleBuildCat(d) {
 function renderBuildBar() {
   const bar = $('buildbar'); if (!bar) return;
   const show = GAME.running && toolId() === 'build' && !GAME.paste && !GAME.selDrag && !selModeHeld();
-  if (bar.hidden === show) bar.hidden = !show;
+  if (bar.hidden === show) { bar.hidden = !show; $('hud').classList.toggle('building', show); }
   if (!show) { lastBuildKey = ''; return; }
   const P = piece(), cat = GAME.buildCat != null ? GAME.buildCat : catOf(P.id), hov = GAME.bbHover;
-  const ids = BUILD_CATS[cat][1];
+  const ids = BUILD_CATS[cat][1], tip = PIECE_BY_ID[GAME.usingPad ? P.id : hov && ids.includes(hov) ? hov : ''];
+  const status = performance.now() - GAME.statusT < 3200 ? GAME.status : '';
+  const ng = ghostBlocks.size + ghostMachines.length + ghostMolds.length;
   const afford = ids.map(id => canAfford(pieceCostNow(PIECE_BY_ID[id]), 1) ? 1 : 0).join('');
-  const key = [cat, P.id, hov, afford, GAME.wallMat, Math.round(money)].join('|');
+  const key = [cat, P.id, tip && tip.id, afford, GAME.wallMat, Math.round(money), GAME.ctrl, GAME.pieceDir[P.id], !!GAME.drag, GAME.dragDir, GAME.filterCfg.inv, GAME.filterCfg.m.join('.'), ng, ghostMissing, status, GAME.statusKind, innerWidth, innerHeight, SET.uiScale].join('|');
   if (key === lastBuildKey) return;
   lastBuildKey = key;
-  const tip = PIECE_BY_ID[hov && ids.includes(hov) ? hov : P.id];
   let h = '<div class="bb-head">' + BUILD_CATS.map(([name], k) => `<button class="bb-tab${k === cat ? ' on' : ''}" data-cat="${k}">${esc(name)}</button>`).join('')
     + '<span class="bb-keys"><kbd>Q</kbd>/<kbd>E</kbd> cycle · <kbd>Shift</kbd>+<kbd>Q</kbd>/<kbd>E</kbd> tab</span></div><div class="bb-tiles">';
   for (const id of ids) {
@@ -59,10 +60,33 @@ function renderBuildBar() {
     const sw = Q.variants === 'wall' ? `<span class="sw" style="background:${rgbOf(WALL_OF[GAME.wallMat])}"></span>` : '';
     h += `<button class="bb-tile${id === P.id ? ' on' : ''}" data-piece="${id}" aria-pressed="${id === P.id}" aria-label="${esc(Q.name)}">${sw}${pieceIcon(id)}<span class="n">${esc(Q.name)}</span><span class="c${ok ? '' : ' bad'}">${esc(costText(cost, 1) || 'free')}</span></button>`;
   }
-  // just the first sentence here; the card at the top left has the rest for the chosen piece
-  const first = (tip.desc.match(/^.*?[.!?](\s|$)/) || [tip.desc])[0].trim();
-  h += `</div><div class="bb-tip"><b>${esc(tip.name)}.</b> ${esc(first)}</div>`;
-  bar.innerHTML = h;
+  h += '</div>';
+  if (!bar.querySelector('.bb-menu')) bar.innerHTML = '<div class="bb-menu"></div><div class="bb-status"></div><div id="bb-pop" hidden></div>';
+  const menu = bar.querySelector('.bb-menu');
+  if (lastBuildMenu !== h) { menu.innerHTML = h; lastBuildMenu = h; }
+  const dir = P.dirs ? P.dirs[GAME.pieceDir[P.id] || 0] : null;
+  // while dragging a line of belts, filters or tubes, the direction is the drag's
+  const dragging = GAME.drag && GAME.dragDir >= 0 && P.dirs;
+  const glyph = d => ({ left: '←', right: '→', up: '↑', down: '↓' })[d] || '';
+  const dirChip = !P.dirs ? '' : dragging ? `<span class="chip ok">${glyph(P.dirs[GAME.dragDir])} ${esc(P.dirs[GAME.dragDir])} · from your drag</span>` : `<span class="chip hot">${glyph(dir)} ${esc(dir)} · R</span>`;
+  const fc = GAME.filterCfg;
+  const sws = ms => ms.slice(0, 6).map(m => `<span class="sw" style="display:inline-block;vertical-align:-2px;width:9px;height:9px;margin-right:2px;background:${rgbOf(m)}"></span>`).join('') + (ms.length > 6 ? `+${ms.length - 6}` : '');
+  const variant = pieceUsesWall(P) ? `<span class="chip hot"><span class="sw" style="display:inline-block;vertical-align:-2px;width:9px;height:9px;margin-right:4px;background:${rgbOf(WALL_OF[GAME.wallMat])}"></span>${esc(MD[WALL_OF[GAME.wallMat]].name.toLowerCase())} · R</span>`
+    : P.filter ? `<span class="chip hot">${fc.inv ? 'carries' : 'drops'} ${fc.m.length ? sws(fc.m) : 'nothing'} · F</span>${dirChip}`
+    : dir ? dirChip : '';
+  bar.querySelector('.bb-status').innerHTML = variant + (GAME.ctrl ? '<span class="chip hot">Replace · Ctrl</span>' : '')
+    + (ng ? `<span class="chip ok">${ng} ghost pieces waiting${ghostMissing ? ', some short on materials' : ''}.</span>` : '')
+    + (status ? `<span class="chip ${GAME.statusKind === 'info' ? 'ok' : 'bad'}">${esc(status)}</span>` : '');
+  const pop = $('bb-pop'); pop.hidden = !tip;
+  if (!tip) return;
+  const size = tip.kind === 'machine' ? `${tip.bw}×${tip.bh} blocks` : tip.kind === 'mold' ? `${MOLDS[tip.mold].bw}×${MOLDS[tip.mold].bh} blocks` : '1 block';
+  pop.innerHTML = `<div class="bb-title">${pieceIcon(tip.id)}<b>${esc(tip.name)}</b></div><div class="bb-chips">${chipCost(pieceCostNow(tip))}<span class="chip">${size}</span>${tip.power ? `<span class="chip">${tip.power} power</span>` : ''}</div>
+    <div class="bb-desc">${esc(tip.desc)}</div><div class="bb-place"><b>How to place</b> ${tip.kind === 'block' ? 'Drag for a line, Shift-drag for a rectangle; out of reach becomes ghosts.' : 'Click to place.'}${tip.dirs && tip.kind === 'block' ? ' A dragged line runs the way you drag it; a single click uses <kbd>R</kbd>.' : tip.dirs ? ' <kbd>R</kbd> turns it.' : pieceUsesWall(tip) ? ' <kbd>R</kbd> picks the material.' : ''}</div>
+    ${tip.filter ? `<div class="bb-place">New ones will ${esc(filterSentence(GAME.filterCfg))}. <kbd>F</kbd> sets materials and mode (or click materials in the bag, or <kbd>T</kbd> over one); <kbd>F</kbd> on a placed filter changes its whole row.</div>` : ''}
+    <div class="bb-place"><kbd>Ctrl</kbd> replace · <kbd>Ctrl</kbd>+<kbd>Z</kbd> undo · right click take back · middle mouse pick · hold <kbd>C</kbd>/<kbd>X</kbd> copy/cut · <kbd>V</kbd> paste</div>`;
+  const tile = bar.querySelector(`[data-piece="${tip.id}"]`); if (!tile) { pop.hidden = true; return; }
+  const r = tile.getBoundingClientRect(), br = bar.getBoundingClientRect(), w = pop.getBoundingClientRect().width;
+  pop.style.left = `${Math.max(8, Math.min(innerWidth - w - 8, r.left + r.width / 2 - w / 2)) - br.left}px`;
 }
 function setupBuildBar() {
   const bar = $('buildbar'); if (!bar) return;