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, 18 insertions, 0 deletions

diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index bb6aa43..115646e 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -55,6 +55,7 @@
 #include "querycompleter.h"
 #include "carddelegate.h"
 #include "cardlayout.h"
+#include "searchterm.h"
 #include "tagchip.h"
 #include "tagdialog.h"
 #include "savequerydialog.h"
@@ -672,6 +673,8 @@ void MainWindow::buildUi()
             this, &MainWindow::onPlaceholderQueryRequested);
     connect(m_messageView, &MessageView::staleThreadRecoveryRequested,
             this, &MainWindow::recoverStaleThread);
+    connect(m_messageView, &MessageView::searchRequested,
+            this, &MainWindow::runSearchFromPane);
 
     m_splitter = new QSplitter(Qt::Horizontal, central);
     m_splitter->addWidget(m_threadView);
@@ -1648,6 +1651,21 @@ void MainWindow::onPlaceholderQueryRequested(const QString &query)
     runCurrentQuery();
 }
 
+void MainWindow::runSearchFromPane(const QString &query, bool extend)
+{
+    if (query.isEmpty())
+        return;
+
+    const QString next =
+        extend ? SearchTerm::extend(m_queryEdit->text(), query) : query;
+
+    // Through the query bar and the existing runner, so the account scope, the
+    // generation counter and the flat-mode reset all behave exactly as they do
+    // for a typed query. Nothing here builds a second query path.
+    m_queryEdit->setText(next);
+    runCurrentQuery();
+}
+
 void MainWindow::showWarnings()
 {
     const QStringList warnings = m_config.warnings() + m_keyMap.warnings();