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, 10 insertions, 5 deletions

diff --git a/src/mimeparser.cpp b/src/mimeparser.cpp
index ecf56f1..2782a4a 100644
--- a/src/mimeparser.cpp
+++ b/src/mimeparser.cpp
@@ -272,20 +272,25 @@ QString recipientSummary(const QString &rawTo, int maxNames)
     return summary;
 }
 
-QString attachmentFolderName(const QString &rfc822Date, const QString &subject)
+QDateTime MimeParser::parseDate(const QString &rfc822Date)
 {
-    // The date prefix sorts chronologically in a file manager. A Date: header
-    // that does not parse is simply dropped rather than guessed at.
     // A trailing timezone comment, "... +0200 (CEST)", is legal per RFC 5322
     // and common in the wild, but Qt::RFC2822Date rejects the whole string
     // when one is present (verified on Qt 6.11). Strip comments before
-    // parsing, or every such message silently loses its date prefix.
+    // parsing, or every such message silently loses its date.
     QString cleaned = rfc822Date;
     cleaned.remove(QRegularExpression(QStringLiteral("\\s*\\([^)]*\\)")));
     cleaned = cleaned.trimmed();
 
+    return QDateTime::fromString(cleaned, Qt::RFC2822Date);
+}
+
+QString attachmentFolderName(const QString &rfc822Date, const QString &subject)
+{
+    // The date prefix sorts chronologically in a file manager. A Date: header
+    // that does not parse is simply dropped rather than guessed at.
     QString prefix;
-    const QDateTime parsed = QDateTime::fromString(cleaned, Qt::RFC2822Date);
+    const QDateTime parsed = MimeParser::parseDate(rfc822Date);
     if (parsed.isValid())
         prefix = parsed.toString(QStringLiteral("yyyy-MM-dd"));