Merge: searching from the message pane (item 85)

Five surfaces in the message pane offer a search built from what they show:
the header's subject and date, its sender and recipients on a single-message
thread, a tag chip, a body selection, and every header per message in the
details dialog. Each offers Search for this, which replaces the query, and
Add to search, which narrows it.

The details dialog became labelled rows along the way, which the user wanted
independently of this feature.

Hand tested through every surface, including the case the parenthesising
exists for: adding a sender to 'tag:inbox or tag:flagged' narrows it rather
than widening it.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/mainwindow.h b/src/mainwindow.h
index a68fcd9..f54a889 100644
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -373,6 +373,13 @@ private slots:
     /// Runs a query the user clicked on the placeholder pane.
     void onPlaceholderQueryRequested(const QString &query);
 
+    /// Runs a search asked for from the message pane.
+    ///
+    /// `extend` narrows the current query rather than replacing it. The panes
+    /// carry a finished query and no knowledge of the bar; the combining
+    /// happens here, because only the window can see what the bar holds.
+    void runSearchFromPane(const QString &query, bool extend);
+
     /// Runs one tagging rule's query in the thread list, so the user can see
     /// which mail it collects. The rules dialog stays open; the point is to
     /// compare the rule against its results.