1 files changed, 121 insertions, 0 deletions
diff --git a/src/pendingchangesdialog.cpp b/src/pendingchangesdialog.cpp
new file mode 100644
index 0000000..71e3bb0
--- /dev/null
+++ b/src/pendingchangesdialog.cpp
@@ -0,0 +1,121 @@
+/*
+ * qtmaildir - a Qt6 mail client for notmuch-indexed Maildirs
+ * Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "pendingchangesdialog.h"
+
+#include <QDialogButtonBox>
+#include <QGridLayout>
+#include <QLabel>
+#include <QScrollArea>
+#include <QVBoxLayout>
+
+QVector<PendingChangeRow> PendingChangesDialog::rowsFor(
+    const QVector<PendingChange> &changes)
+{
+    QVector<PendingChangeRow> rows;
+    rows.reserve(changes.size());
+
+    // A run is a stretch of changes sharing one id, which the snapshot has
+    // already grouped. Only the first row of a run carries a subject, so the
+    // actions read as belonging to the message above them.
+    //
+    // Compared against the PREVIOUS id rather than collected into a map: the
+    // snapshot's order is deliberate (the actions under one message keep the
+    // order they were made in), and a map would discard it.
+    QString previousId;
+    bool first = true;
+    for (const PendingChange &change : changes) {
+        const bool startsMessage = first || change.id != previousId;
+        rows.append(PendingChangeRow{
+            startsMessage ? change.subject : QString(),
+            change.action,
+            startsMessage,
+            startsMessage ? change.messageCount : -1 });
+        previousId = change.id;
+        first = false;
+    }
+    return rows;
+}
+
+PendingChangesDialog::PendingChangesDialog(
+    const QVector<PendingChange> &changes, QWidget *parent)
+    : QDialog(parent), m_rows(rowsFor(changes))
+{
+    setWindowTitle(tr("Unsynced changes"));
+
+    auto *layout = new QVBoxLayout(this);
+
+    auto *intro = new QLabel(
+        tr("Changes made here that a sync has not yet carried to the mail "
+           "store. This list is a snapshot taken when it was opened."),
+        this);
+    intro->setWordWrap(true);
+    layout->addWidget(intro);
+
+    auto *content = new QWidget;
+    auto *grid = new QGridLayout(content);
+    grid->setColumnStretch(0, 1);
+
+    int line = 0;
+    for (const PendingChangeRow &row : m_rows) {
+        if (row.startsMessage) {
+            // PlainText stated rather than left to Qt, for the reason
+            // MessageDetailsDialog states it on every value: a subject comes
+            // from a stranger, and a QLabel guesses under Qt::AutoText. Plain
+            // text cannot interpret markup, so there is nothing to escape.
+            QString text = row.subject;
+            if (text.isEmpty()) {
+                // The id no longer resolves. The row stays, because the count
+                // the user clicked has to equal the list they are shown.
+                text = tr("(no longer in the index)");
+            }
+            if (row.messageCount >= 0) {
+                text = tr("%1 (whole thread, %n message(s))", "",
+                          row.messageCount).arg(text);
+            }
+            auto *subject = new QLabel(text, content);
+            subject->setTextFormat(Qt::PlainText);
+            subject->setWordWrap(true);
+            grid->addWidget(subject, line, 0);
+        }
+
+        auto *action = new QLabel(row.action, content);
+        action->setTextFormat(Qt::PlainText);
+        grid->addWidget(action, line, 1, Qt::AlignTop | Qt::AlignRight);
+        ++line;
+    }
+
+    if (m_rows.isEmpty()) {
+        grid->addWidget(new QLabel(tr("Nothing is waiting to be synced."),
+                                   content),
+                        0, 0);
+    }
+
+    grid->setRowStretch(line, 1);
+
+    auto *scroll = new QScrollArea(this);
+    scroll->setWidget(content);
+    scroll->setWidgetResizable(true);
+    layout->addWidget(scroll);
+
+    auto *buttons = new QDialogButtonBox(QDialogButtonBox::Close, this);
+    connect(buttons, &QDialogButtonBox::rejected, this, &QDialog::reject);
+    layout->addWidget(buttons);
+
+    resize(600, 380);
+}