improve task list handling

assets/page/actions.js

@@ -3,6 +3,36 @@ function encodePickedPath(p) {
     return '/' + p.replace(/^\/+/, '').split('/').map(encodeURIComponent).join('/');
 }
 
+// postReplace POSTs to action with the optional form body, then loads target
+// into the current history entry — so the action and its result occupy one
+// entry instead of two, and back-navigation skips past the stale pre-mutation
+// snapshot in bfcache. body may be null for empty POSTs.
+//
+// We can't just call window.location.replace(target): when target differs from
+// the current URL only by fragment, the browser updates the URL bar without
+// re-fetching, so a server-side mutation wouldn't be reflected. Instead,
+// rewrite the current entry's URL via history.replaceState, then reload — the
+// reload always re-fetches and preserves the (new) URL including its fragment.
+function postReplace(action, body, target) {
+    var init = { method: 'POST', redirect: 'manual' };
+    if (body) {
+        init.headers = { 'Content-Type': 'application/x-www-form-urlencoded' };
+        init.body = body;
+    }
+    fetch(action, init).then(function (res) {
+        if (res.type === 'opaqueredirect' || res.ok) {
+            window.history.replaceState(null, '', target);
+            window.location.reload();
+            return;
+        }
+        return res.text().then(function (msg) {
+            alert(msg || ('Request failed (' + res.status + ')'));
+        });
+    }).catch(function () {
+        alert('Network error');
+    });
+}
+
 function promptPageName(title, initial, confirmLabel, onName) {
     var input = document.createElement('input');
     input.type = 'text';
@@ -89,11 +119,9 @@ function movePage() {
                         var action = window.location.pathname + '?move=' +
                             encodeURIComponent(dest);
                         if (linksCheckbox.checked) action += '&links=1';
-                        var form = document.createElement('form');
-                        form.method = 'POST';
-                        form.action = action;
-                        document.body.appendChild(form);
-                        form.submit();
+                        var target = encodePickedPath(dest) + '/';
+                        closeModal();
+                        postReplace(action, null, target);
                     }
                 }
             });
@@ -112,11 +140,11 @@ function deletePage() {
             danger: true,
             enterConfirms: false,
             onConfirm: function () {
-                var form = document.createElement('form');
-                form.method = 'POST';
-                form.action = window.location.pathname + '?delete=1';
-                document.body.appendChild(form);
-                form.submit();
+                var p = window.location.pathname.replace(/\/+$/, '');
+                var idx = p.lastIndexOf('/');
+                var parent = idx > 0 ? p.substring(0, idx + 1) : '/';
+                closeModal();
+                postReplace(window.location.pathname + '?delete=1', null, parent);
             }
         },
         cancel: { autofocus: true },

assets/page/anchors.js

@@ -1,17 +1,114 @@
 (function () {
-  var content = document.querySelector("main");
+  var content = document.querySelector('.content');
   if (!content) return;
 
-  var headings = content.querySelectorAll("h2, h3, h4");
-  if (!headings) return
+  var allHeadings = content.querySelectorAll('h1, h2, h3, h4, h5, h6');
+  if (!allHeadings.length) return;
 
-  headings.forEach(function (h) {
-      if (!h.id) return;
-      var a = document.createElement('a');
-      a.href = '#' + h.id;
-      a.className = 'heading-anchor';
-      a.setAttribute('aria-label', 'Link to this section');
-      a.textContent = '#';
-      h.insertBefore(a, h.firstChild);
+  function copyAnchor(id, item, label, menu) {
+    var url = window.location.origin + window.location.pathname + '#' + id;
+    function flash() {
+      item.textContent = 'Copied!';
+      setTimeout(function () {
+        item.textContent = label;
+        menu.classList.remove('is-open');
+      }, 1200);
+    }
+    function fallback() {
+      var ta = document.createElement('textarea');
+      ta.value = url;
+      ta.setAttribute('readonly', '');
+      ta.style.position = 'fixed';
+      ta.style.opacity = '0';
+      document.body.appendChild(ta);
+      ta.select();
+      var ok = false;
+      try { ok = document.execCommand('copy'); } catch (e) { ok = false; }
+      document.body.removeChild(ta);
+      if (ok) flash();
+      else openModal({
+        title: 'Copy anchor link',
+        body: 'Could not copy automatically. URL:\n' + url,
+        confirm: { label: 'OK', onConfirm: function () { closeModal(); } }
+      });
+    }
+    if (navigator.clipboard && navigator.clipboard.writeText) {
+      navigator.clipboard.writeText(url).then(flash, fallback);
+    } else {
+      fallback();
+    }
+  }
+
+  function addTask(sectionIndex, headingId) {
+    var input = document.createElement('input');
+    input.type = 'text';
+    input.className = 'modal-input';
+    input.placeholder = 'Task description';
+    var ctrl = openModal({
+      title: 'Add task',
+      body: input,
+      confirm: {
+        label: 'ADD',
+        initiallyDisabled: true,
+        onConfirm: function () {
+          var text = input.value.trim();
+          if (!text) return;
+          var action = window.location.pathname + '?addtask=' + sectionIndex;
+          var target = window.location.pathname + '#' + headingId;
+          closeModal();
+          postReplace(action, 'text=' + encodeURIComponent(text), target);
+        }
+      }
+    });
+    input.addEventListener('input', function () {
+      ctrl.setConfirmDisabled(input.value.trim() === '');
+    });
+  }
+
+  allHeadings.forEach(function (h, i) {
+    if (!h.id) return;
+    var tag = h.tagName.toLowerCase();
+    if (tag !== 'h2' && tag !== 'h3' && tag !== 'h4') return;
+
+    var sectionIndex = i + 1;
+
+    var wrap = document.createElement('span');
+    wrap.className = 'dropdown heading-anchor';
+
+    var trigger = document.createElement('button');
+    trigger.type = 'button';
+    trigger.className = 'dropdown-toggle';
+    trigger.setAttribute('aria-haspopup', 'menu');
+    trigger.setAttribute('aria-label', 'Section actions');
+    trigger.textContent = '#';
+
+    var menu = document.createElement('div');
+    menu.className = 'dropdown-menu';
+
+    var copyLabel = 'Copy anchor link';
+    var copyBtn = document.createElement('button');
+    copyBtn.type = 'button';
+    copyBtn.className = 'btn btn-tool btn-block';
+    copyBtn.dataset.action = 'copy-anchor';
+    copyBtn.textContent = copyLabel;
+    copyBtn.addEventListener('click', function (e) {
+      e.stopPropagation();
+      copyAnchor(h.id, copyBtn, copyLabel, menu);
+    });
+
+    var addBtn = document.createElement('button');
+    addBtn.type = 'button';
+    addBtn.className = 'btn btn-tool btn-block';
+    addBtn.dataset.action = 'add-task';
+    addBtn.textContent = 'Add task';
+    addBtn.addEventListener('click', function () { addTask(sectionIndex, h.id); });
+
+    menu.appendChild(copyBtn);
+    menu.appendChild(addBtn);
+    wrap.appendChild(trigger);
+    wrap.appendChild(menu);
+    h.insertBefore(wrap, h.firstChild);
+
+    wireDropdown(trigger);
   });
 }());

assets/page/main.html

@@ -42,6 +42,9 @@
     <button class="btn btn-block" data-companion-reveal hidden title="Reveal in file manager">REVEAL ON CLIENT</button>
     {{if not .IsRoot}}
     <button class="btn btn-block" onclick="movePage()" title="Move page (M)">MOVE PAGE</button>
+    {{end}}
+    <button class="btn btn-block" data-action="clean-tasks" onclick="cleanUpTasks()" title="Clean up finished tasks" hidden>CLEAN UP TASKS</button>
+    {{if not .IsRoot}}
     <button class="btn btn-block danger" onclick="deletePage()" title="Delete page">DELETE PAGE</button>
     {{end}}
 </nav>{{end}}{{if .SidebarWidget}}{{.SidebarWidget}}{{end}}{{end}}

assets/page/tasks.js

@@ -21,4 +21,25 @@
             });
         });
     });
+
+    var hasChecked = !!document.querySelector('input.task-checkbox:checked');
+    if (hasChecked) {
+        var btn = document.querySelector('[data-action="clean-tasks"]');
+        if (btn) btn.hidden = false;
+    }
 })();
+
+function cleanUpTasks() {
+    openModal({
+        title: 'Clean up tasks',
+        body: 'Remove all completed tasks from this page?',
+        confirm: {
+            label: 'CLEAN UP',
+            danger: true,
+            onConfirm: function () {
+                closeModal();
+                postReplace(window.location.pathname + '?cleantasks=1', null, window.location.pathname);
+            }
+        }
+    });
+}

assets/page/toc.js

@@ -21,7 +21,7 @@ document.addEventListener("DOMContentLoaded", function () {
     var a = document.createElement("a");
     a.href = "#" + h.id;
     var clone = h.cloneNode(true);
-    clone.querySelectorAll(".btn, .muted, .heading-anchor").forEach(function (el) { el.remove(); });
+    clone.querySelectorAll(".btn, .muted, .heading-anchor, .dropdown").forEach(function (el) { el.remove(); });
     a.textContent = clone.textContent.trim();
     li.appendChild(a);
     list.appendChild(li);