Change folder hierarchy

_extensions/notes/glossary.js

@@ -0,0 +1,68 @@
+// glossary — hover tooltip for .gls-sym usages (prose links and MathJax \class nodes)
+(function () {
+  var tip = null;
+
+  function ensureTip() {
+    if (tip === null) {
+      tip = document.createElement("div");
+      tip.className = "gls-float";
+      tip.style.display = "none";
+      document.body.appendChild(tip);
+    }
+    return tip;
+  }
+
+  function keyOf(el) {
+    if (el.dataset && el.dataset.glsKey) return el.dataset.glsKey;
+    for (var i = 0; i < el.classList.length; i++) {
+      var c = el.classList[i];
+      if (c.indexOf("gls-key-") === 0) return c.slice(8);
+    }
+    return null;
+  }
+
+  function show(target) {
+    var key = keyOf(target);
+    if (!key) return;
+    var entry = document.getElementById("gls-" + key);
+    var t = ensureTip();
+    if (entry) {
+      // for a main entry, don't drag every property into the popup
+      var node = entry.cloneNode(true);
+      node.querySelectorAll(".gls-prop-entry").forEach(function (n) { n.remove(); });
+      t.innerHTML = node.innerHTML;
+    } else if (window.__glsData && window.__glsData[key]) {
+      // entry lives on another page (book chapters render separately)
+      t.innerHTML = window.__glsData[key];
+    } else {
+      return;
+    }
+    t.style.display = "block";
+    if (window.MathJax && window.MathJax.typesetPromise) {
+      window.MathJax.typesetPromise([t]).catch(function () {});
+    }
+    var r = target.getBoundingClientRect();
+    var x = r.left + window.scrollX;
+    var y = r.bottom + window.scrollY + 6;
+    // keep it on screen horizontally
+    var w = t.offsetWidth;
+    var maxX = window.scrollX + document.documentElement.clientWidth - w - 12;
+    t.style.left = Math.max(window.scrollX + 8, Math.min(x, maxX)) + "px";
+    t.style.top = y + "px";
+  }
+
+  function hide() {
+    if (tip !== null) tip.style.display = "none";
+  }
+
+  document.addEventListener("mouseover", function (e) {
+    var el = e.target.closest ? e.target.closest(".gls-sym") : null;
+    if (el) show(el);
+  });
+  document.addEventListener("mouseout", function (e) {
+    var el = e.target.closest ? e.target.closest(".gls-sym") : null;
+    if (el) hide();
+  });
+  document.addEventListener("click", hide);
+  window.addEventListener("scroll", hide, { passive: true });
+})();