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/**
* Copyright (C) 2021-2024 Saturneric <eric@bktus.com>
*
* This file is part of GpgFrontend.
*
* GpgFrontend is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GpgFrontend 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 GpgFrontend. If not, see <https://www.gnu.org/licenses/>.
*
* The initial version of the source code is inherited from
* the gpg4usb project, which is under GPL-3.0-or-later.
*
* All the source code of GpgFrontend was modified and released by
* Saturneric <eric@bktus.com> starting on May 12, 2021.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#pragma once
#include <QWidget>
#include "EMailModel.h"
class QLineEdit;
class QTreeWidget;
class QTreeWidgetItem;
class QLabel;
/**
* @brief The message's headers, as one searchable list.
*
* Rows come from the ORIGINAL bytes rather than from a reserialization, so
* order, folding, duplicates and encoding are the sender's and not vmime's.
* That distinction is the whole point of the view: a header list fed by a
* round trip shows the parser's idea of the headers -- reordered, refolded and
* re-encoded -- while claiming to show the sender's, which is precisely the
* evidence header forensics depends on.
*
* Each row therefore carries both readings: the decoded value, which is what
* the field means, and the exact bytes it was written as, which is what it
* says. They are shown together rather than behind a mode switch, because the
* question "do these two disagree?" is the one worth being able to ask.
*/
class EMailHeaderView : public QWidget {
Q_OBJECT
public:
explicit EMailHeaderView(QWidget* parent = nullptr);
/**
* @brief Shows the headers of @p root.
*
* @param root the parsed tree; its header_fields supply the decoded reading
* @param raw the ORIGINAL message bytes, which supply the rows themselves
*/
void SetMessage(const EMailPart& root, const QByteArray& raw);
/// Drops everything shown.
void Clear();
/// Replaces the table with @p text, for when there is nothing to tabulate.
/// Passing an empty string is not a way to clear the view; use Clear().
void ShowNotice(const QString& text);
protected:
void changeEvent(QEvent* event) override;
private:
void build_ui();
/// The single place this view's colours are decided. Must not touch fonts.
void apply_colors();
void refresh();
/// Hides the rows that do not match the filter, and shows the placeholder
/// when that leaves nothing. Never rebuilds: filtering is a view choice and
/// must not be able to change what is in the list.
void apply_filter();
void copy_selected(bool whole_field);
/// Copies out of @p item, which may be nullptr.
void copy_item(QTreeWidgetItem* item, bool whole_field);
QLineEdit* filter_{};
QTreeWidget* tree_{};
QLabel* empty_notice_{};
EMailPart root_;
QByteArray raw_;
bool loaded_{false};
};
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