Palette: surface :-verbs as runnable M-x entries

The command palette now lists the :-verb pack alongside QActions: Sort Lines,
Sort Lines (unique), Reverse Lines, Case: UPPER/lower/Title/snake/camel/kebab,
Base64 Encode/Decode, ROT13, Insert UUID. Entries carry an ollie:cmd: id; on
activation runAction executes the command via
Editor::queryCommand(verb)->exec(view, cmd, msg). The free-text pipe verb
stays on the command line. All 6 ctest suites green.

docs/PLAN.md

@@ -179,8 +179,10 @@ Therefore the palette is replaced, not extended, and the replacement is built on
   nothing is selected); `pipe <shell>` runs `sh -c <shell>` with the selection
   on stdin and replaces it with stdout. 15 transform tests. The command object
   is created once by `OlliePlugin` (auto-registers globally).
-  - Reachable from Kate's command line today; surfacing the verbs in the M-x
-    palette (they are `Command`s, not `QAction`s) is a follow-up.
+  - Also surfaced in the M-x palette as directly-runnable entries (`case` is
+    expanded into one entry per style). The palette id is prefixed `ollie:cmd:`
+    and executed via `Editor::queryCommand(verb)->exec(view, cmd, msg)`. The
+    free-text `pipe` verb stays on the command line only.
 - Project = directory ("open folder == open project"): TODO.
 - Fuzzy file / symbol switchers scoped to the folder: TODO.
 

src/plugin/ollieplugin.cpp

@@ -11,6 +11,8 @@
 #include <KTextEditor/MainWindow>
 #include <KTextEditor/View>
 #include <KTextEditor/Document>
+#include <KTextEditor/Editor>
+#include <KTextEditor/Command>
 
 #include <KActionCollection>
 #include <KXMLGUIClient>
@@ -121,6 +123,36 @@ KTextEditor::Cursor findOpener(KTextEditor::Document *doc, KTextEditor::Cursor p
     }
     return KTextEditor::Cursor::invalid();
 }
+
+// Prefix marking a palette id that is a ":" command string to execute rather
+// than a QAction to trigger.
+const QLatin1String kCmdPrefix("ollie:cmd:");
+
+// The complete (argument-free) command verbs offered in the palette. Verbs that
+// need free-text arguments (pipe) stay on the command line; `case` is expanded
+// into one entry per style so each is directly runnable.
+struct VerbItem {
+    QString command; // the full command string to execute
+    QString label;   // palette label
+};
+QList<VerbItem> paletteVerbs()
+{
+    return {
+        {QStringLiteral("sort"),        QStringLiteral("Sort Lines")},
+        {QStringLiteral("sort u"),      QStringLiteral("Sort Lines (unique)")},
+        {QStringLiteral("rsort"),       QStringLiteral("Reverse Lines")},
+        {QStringLiteral("case upper"),  QStringLiteral("Case: UPPER")},
+        {QStringLiteral("case lower"),  QStringLiteral("Case: lower")},
+        {QStringLiteral("case title"),  QStringLiteral("Case: Title")},
+        {QStringLiteral("case snake"),  QStringLiteral("Case: snake_case")},
+        {QStringLiteral("case camel"),  QStringLiteral("Case: camelCase")},
+        {QStringLiteral("case kebab"),  QStringLiteral("Case: kebab-case")},
+        {QStringLiteral("b64enc"),      QStringLiteral("Base64 Encode")},
+        {QStringLiteral("b64dec"),      QStringLiteral("Base64 Decode")},
+        {QStringLiteral("rot13"),       QStringLiteral("ROT13")},
+        {QStringLiteral("uuid"),        QStringLiteral("Insert UUID")},
+    };
+}
 } // namespace
 
 // ---------------------------------------------------------------------------
@@ -308,7 +340,7 @@ void OllieView::showCommandPalette()
 
     m_actionsById.clear();
     QList<PaletteItem> items;
-    items.reserve(entries.size());
+    items.reserve(entries.size() + 16);
     for (const ActionEntry &e : entries) {
         m_actionsById.insert(e.id, e.action);
 
@@ -319,6 +351,15 @@ void OllieView::showCommandPalette()
         items.push_back(item);
     }
 
+    // Also offer the ":"-verb pack as directly-runnable palette entries.
+    for (const VerbItem &v : paletteVerbs()) {
+        PaletteItem item;
+        item.id = kCmdPrefix + v.command;
+        item.label = v.label;
+        item.group = QStringLiteral(":") + v.command;
+        items.push_back(item);
+    }
+
     m_palette->setItems(items);
 
     // Center the palette near the top of the active window.
@@ -334,6 +375,21 @@ void OllieView::showCommandPalette()
 
 void OllieView::runAction(const QString &actionId)
 {
+    // A ":"-verb entry: execute the command on the active view.
+    if (actionId.startsWith(kCmdPrefix)) {
+        const QString command = actionId.mid(QString(kCmdPrefix).size());
+        KTextEditor::View *view = m_mainWindow->activeView();
+        KTextEditor::Editor *editor = KTextEditor::Editor::instance();
+        if (view && editor) {
+            const QString verb = command.section(QLatin1Char(' '), 0, 0);
+            if (KTextEditor::Command *c = editor->queryCommand(verb)) {
+                QString msg;
+                c->exec(view, command, msg);
+            }
+        }
+        return;
+    }
+
     QPointer<QAction> action = m_actionsById.value(actionId);
     if (action) {
         action->trigger();