Refinements for tree picker

assets/editor.js

@@ -53,6 +53,45 @@
         if (result) applyResult(result);
     }
 
+    function promptDisplayText(initial, onDone) {
+        var input = document.createElement('input');
+        input.type = 'text';
+        input.className = 'modal-input';
+        input.placeholder = 'Display text (optional)';
+        if (initial) input.value = initial;
+        var handle = openModal({
+            title: 'Insert link — display text?',
+            body: input,
+            confirm: {
+                label: 'INSERT',
+                onConfirm: function () {
+                    handle.close();
+                    onDone(input.value.trim());
+                }
+            }
+        });
+    }
+
+    function insertWikilink() {
+        var sel = textarea.value.slice(textarea.selectionStart, textarea.selectionEnd);
+        openTreePicker({
+            title: 'Insert link',
+            mode: 'any',
+            initialPath: '/',
+            confirmLabel: 'NEXT',
+            onSelect: function (path, kind) {
+                if (kind === 'folder') {
+                    promptDisplayText(sel, function (display) {
+                        insertAtCursor(display ? '[[' + path + '|' + display + ']]' : '[[' + path + ']]');
+                    });
+                } else {
+                    var name = path.split('/').pop();
+                    insertAtCursor('[' + (sel || name) + '](' + path + ')');
+                }
+            }
+        });
+    }
+
     // --- Actions ---
 
     var T = EditorTables;
@@ -71,23 +110,7 @@
         codeblock:      function () { wrap('```\n', '\n```', 'code'); },
         quote:          function () { linePrefix('> '); },
         link:           function () { wrap('[', '](url)', 'link text'); },
-        wikilink:       function () {
-            var sel = textarea.value.slice(textarea.selectionStart, textarea.selectionEnd);
-            openTreePicker({
-                title: 'Insert link',
-                mode: 'any',
-                initialPath: '/',
-                confirmLabel: 'INSERT',
-                onSelect: function (path, kind) {
-                    if (kind === 'folder') {
-                        insertAtCursor(sel ? '[[' + path + '|' + sel + ']]' : '[[' + path + ']]');
-                    } else {
-                        var name = path.split('/').pop();
-                        insertAtCursor('[' + (sel || name) + '](' + path + ')');
-                    }
-                }
-            });
-        },
+        wikilink:       insertWikilink,
         ul:             function () { linePrefix('- '); },
         ol:             function () { linePrefix('1. '); },
         hr:             function () { wrap('\n\n---\n\n', '', ''); },

assets/tree-picker.js

@@ -138,6 +138,13 @@
                 }
             });
 
+            if (kind === 'folder') {
+                row.addEventListener('dblclick', function (e) {
+                    e.preventDefault();
+                    if (isOpen) collapse(); else expand();
+                });
+            }
+
             return {
                 rowEl: row,
                 name: name,