feat(completion): wire query completion into the main window

Adds the complete_query action, whose registration the assertion in
registerActions() has been demanding since keymap gained the name: a
known action nothing implements would have been a silently dead binding.

Also lands the QueryCompleter half of the manual trigger, which the
keymap commit left behind: triggerCompletion() and the focus-in filter
gated on completion_on_focus.

Tags refresh at startup, after a sync, and after a mutation introduces a
tag not already known, since that is the tag most likely to be typed
again. onAllTagsReady deliberately drops the generation the signal
carries: a tag list is not an ordered query result, so a later one is
always at least as good as an earlier one and discarding on staleness
could only throw away a good list.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/querycompleter.h b/src/querycompleter.h
index 374fe84..61b2555 100644
--- a/src/querycompleter.h
+++ b/src/querycompleter.h
@@ -110,6 +110,14 @@ public:
     /// synthetic key events instead would test the keyboard layout, not this.
     void acceptCompletion(const QString &value);
 
+public slots:
+    /// Opens the popup regardless of what has been typed. Bound to
+    /// complete_query, and the only trigger when completion_on_focus is off.
+    void triggerCompletion();
+
+protected:
+    bool eventFilter(QObject *watched, QEvent *event) override;
+
 private:
     QList<CompletionEntry> entriesFor(const CompletionContext &context) const;
     void rebuildModel(const CompletionContext &context);