networkstyle.cpp

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// Copyright (c) 2014-2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <qt/networkstyle.h>

#include <qt/guiconstants.h>

#include <chainparamsbase.h>
#include <tinyformat.h>

#include <QApplication>

static const struct {
    const char *networkId;
    const char *appName;
    const int iconColorHueShift;
    const int iconColorSaturationReduction;
} network_styles[] = {{"main", QAPP_APP_NAME_DEFAULT, 0, 0},
                      {"test", QAPP_APP_NAME_TESTNET, 70, 30},
                      {"regtest", QAPP_APP_NAME_REGTEST, 160, 30}};
static const unsigned network_styles_count =
    sizeof(network_styles) / sizeof(*network_styles);

// titleAddText needs to be const char* for tr()
NetworkStyle::NetworkStyle(const QString &_appName, const int iconColorHueShift,
                           const int iconColorSaturationReduction,
                           const char *_titleAddText)
    : appName(_appName),
      titleAddText(qApp->translate("SplashScreen", _titleAddText)) {
    // load pixmap
    QPixmap pixmap(":/icons/bitcoin");

    if (iconColorHueShift != 0 && iconColorSaturationReduction != 0) {
        // generate QImage from QPixmap
        QImage img = pixmap.toImage();

        int h, s, l, a;

        // traverse though lines
        for (int y = 0; y < img.height(); y++) {
            QRgb *scL = reinterpret_cast<QRgb *>(img.scanLine(y));

            // loop through pixels
            for (int x = 0; x < img.width(); x++) {
                // preserve alpha because QColor::getHsl doesn't return the
                // alpha value
                a = qAlpha(scL[x]);
                QColor col(scL[x]);

                // get hue value
                col.getHsl(&h, &s, &l);

                // rotate color on RGB color circle
                // 70° should end up with the typical "testnet" green
                h += iconColorHueShift;

                // change saturation value
                if (s > iconColorSaturationReduction) {
                    s -= iconColorSaturationReduction;
                }
                col.setHsl(h, s, l, a);

                // set the pixel
                scL[x] = col.rgba();
            }
        }

        // convert back to QPixmap
        pixmap.convertFromImage(img);
    }

    appIcon = QIcon(pixmap);
    trayAndWindowIcon = QIcon(pixmap.scaled(QSize(256, 256)));
}

const NetworkStyle *NetworkStyle::instantiate(const std::string &networkId) {
    std::string titleAddText =
        networkId == CBaseChainParams::MAIN ? "" : strprintf("[%s]", networkId);
    for (unsigned x = 0; x < network_styles_count; ++x) {
        if (networkId == network_styles[x].networkId) {
            return new NetworkStyle(
                network_styles[x].appName, network_styles[x].iconColorHueShift,
                network_styles[x].iconColorSaturationReduction,
                titleAddText.c_str());
        }
    }
    return nullptr;
}