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/*
* 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 "avatar.h"
#include <QCryptographicHash>
#include <QPainter>
#include <QPainterPath>
namespace {
QString twoFrom(const QString &text)
{
const QString trimmed = text.trimmed();
if (trimmed.size() >= 2)
return trimmed.left(2).toUpper();
if (trimmed.size() == 1)
return (trimmed + trimmed).toUpper();
return QString();
}
} // namespace
namespace Avatar {
QString initialsFor(const QString &displayName, const QString &address,
const QString &accountLabel)
{
const QStringList words = displayName.split(QLatin1Char(' '),
Qt::SkipEmptyParts);
if (words.size() >= 2) {
return (words.at(0).left(1) + words.at(1).left(1)).toUpper();
}
if (words.size() == 1) {
const QString one = twoFrom(words.at(0));
if (!one.isEmpty())
return one;
}
// No usable name. The local part and the domain each give one letter,
// which never degrades to a single letter the way the local part alone
// would, and never reads as a truncated word.
const int at = address.indexOf(QLatin1Char('@'));
if (at > 0) {
const QString local = address.left(at).trimmed();
const QString domain = address.mid(at + 1).trimmed();
if (!local.isEmpty() && !domain.isEmpty())
return (local.left(1) + domain.left(1)).toUpper();
}
// An address with no `@` is still something to show.
const QString bare = twoFrom(address);
if (!bare.isEmpty())
return bare;
const QString account = twoFrom(accountLabel);
if (!account.isEmpty())
return account;
// Nothing at all. Two characters regardless, so the shape never breaks.
return QStringLiteral("??");
}
Fill fillFor(const QString &displayName, bool isBusinessSender)
{
// The list first: it is the user's explicit override and must beat the
// heuristic, or a listed sender could never be pinned.
if (isBusinessSender)
return Fill::TwoTone;
return displayName.trimmed().isEmpty() ? Fill::TwoTone : Fill::Identicon;
}
QColor colourFor(const QString &address)
{
// The same construction TagColors::colourFor() uses for a tag with nothing
// configured: hashed so it is stable, at a fixed saturation and lightness
// so it cannot come out neon and cannot lose its contrast with the
// initials. The lightness differs from that function's deliberately: a
// chip carries dark text, a squircle carries white.
const QByteArray digest =
QCryptographicHash::hash(address.toUtf8(), QCryptographicHash::Md5);
const int hue = static_cast<quint8>(digest.at(0)) * 360 / 256;
return QColor::fromHsl(hue, 110, 95);
}
} // namespace Avatar
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