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nheko/src/Utils.cpp

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#include "Utils.h"
#include <QApplication>
#include <QBuffer>
#include <QComboBox>
#include <QDesktopWidget>
#include <QGuiApplication>
#include <QImageReader>
#include <QProcessEnvironment>
#include <QScreen>
#include <QSettings>
#include <QTextDocument>
#include <QXmlStreamReader>
#include <cmath>
#include <variant>
#include <cmark.h>
#include "Cache.h"
#include "Config.h"
#include "MatrixClient.h"
using TimelineEvent = mtx::events::collections::TimelineEvents;
QHash<QString, QString> authorColors_;
template<class T, class Event>
static DescInfo
createDescriptionInfo(const Event &event, const QString &localUser, const QString &room_id)
{
const auto msg = std::get<T>(event);
const auto sender = QString::fromStdString(msg.sender);
const auto username = cache::displayName(room_id, sender);
const auto ts = QDateTime::fromMSecsSinceEpoch(msg.origin_server_ts);
return DescInfo{QString::fromStdString(msg.event_id),
sender,
utils::messageDescription<T>(
username, utils::event_body(event).trimmed(), sender == localUser),
utils::descriptiveTime(ts),
msg.origin_server_ts,
ts};
}
QString
utils::localUser()
{
return QString::fromStdString(http::client()->user_id().to_string());
}
bool
utils::codepointIsEmoji(uint code)
{
// TODO: Be more precise here.
return (code >= 0x2600 && code <= 0x27bf) || (code >= 0x1f300 && code <= 0x1f3ff) ||
(code >= 0x1f000 && code <= 0x1faff);
}
QString
utils::replaceEmoji(const QString &body)
{
QString fmtBody = "";
QVector<uint> utf32_string = body.toUcs4();
QSettings settings;
QString userFontFamily = settings.value("user/emoji_font_family", "emoji").toString();
bool insideFontBlock = false;
for (auto &code : utf32_string) {
if (utils::codepointIsEmoji(code)) {
if (!insideFontBlock) {
fmtBody += QString("<font face=\"" + userFontFamily + "\">");
insideFontBlock = true;
}
} else {
if (insideFontBlock) {
fmtBody += "</font>";
insideFontBlock = false;
}
}
fmtBody += QString::fromUcs4(&code, 1);
}
if (insideFontBlock) {
fmtBody += "</font>";
}
return fmtBody;
}
void
utils::setScaleFactor(float factor)
{
if (factor < 1 || factor > 3)
return;
QSettings settings;
settings.setValue("settings/scale_factor", factor);
}
float
utils::scaleFactor()
{
QSettings settings;
return settings.value("settings/scale_factor", -1).toFloat();
}
bool
utils::respondsToKeyRequests(const std::string &roomId)
{
return respondsToKeyRequests(QString::fromStdString(roomId));
}
bool
utils::respondsToKeyRequests(const QString &roomId)
{
if (roomId.isEmpty())
return false;
QSettings settings;
return settings.value("rooms/respond_to_key_requests/" + roomId, false).toBool();
}
void
utils::setKeyRequestsPreference(QString roomId, bool value)
{
if (roomId.isEmpty())
return;
QSettings settings;
settings.setValue("rooms/respond_to_key_requests/" + roomId, value);
}
QString
utils::descriptiveTime(const QDateTime &then)
{
const auto now = QDateTime::currentDateTime();
const auto days = then.daysTo(now);
if (days == 0)
return QLocale::system().toString(then.time(), QLocale::ShortFormat);
else if (days < 2)
return QString(QCoreApplication::translate("descriptiveTime", "Yesterday"));
else if (days < 7)
return then.toString("dddd");
return QLocale::system().toString(then.date(), QLocale::ShortFormat);
}
DescInfo
utils::getMessageDescription(const TimelineEvent &event,
const QString &localUser,
const QString &room_id)
{
using Audio = mtx::events::RoomEvent<mtx::events::msg::Audio>;
using Emote = mtx::events::RoomEvent<mtx::events::msg::Emote>;
using File = mtx::events::RoomEvent<mtx::events::msg::File>;
using Image = mtx::events::RoomEvent<mtx::events::msg::Image>;
using Notice = mtx::events::RoomEvent<mtx::events::msg::Notice>;
using Text = mtx::events::RoomEvent<mtx::events::msg::Text>;
using Video = mtx::events::RoomEvent<mtx::events::msg::Video>;
using CallInvite = mtx::events::RoomEvent<mtx::events::msg::CallInvite>;
using CallAnswer = mtx::events::RoomEvent<mtx::events::msg::CallAnswer>;
using CallHangUp = mtx::events::RoomEvent<mtx::events::msg::CallHangUp>;
using Encrypted = mtx::events::EncryptedEvent<mtx::events::msg::Encrypted>;
if (std::holds_alternative<Audio>(event)) {
return createDescriptionInfo<Audio>(event, localUser, room_id);
} else if (std::holds_alternative<Emote>(event)) {
return createDescriptionInfo<Emote>(event, localUser, room_id);
} else if (std::holds_alternative<File>(event)) {
return createDescriptionInfo<File>(event, localUser, room_id);
} else if (std::holds_alternative<Image>(event)) {
return createDescriptionInfo<Image>(event, localUser, room_id);
} else if (std::holds_alternative<Notice>(event)) {
return createDescriptionInfo<Notice>(event, localUser, room_id);
} else if (std::holds_alternative<Text>(event)) {
return createDescriptionInfo<Text>(event, localUser, room_id);
} else if (std::holds_alternative<Video>(event)) {
return createDescriptionInfo<Video>(event, localUser, room_id);
} else if (std::holds_alternative<CallInvite>(event)) {
return createDescriptionInfo<CallInvite>(event, localUser, room_id);
} else if (std::holds_alternative<CallAnswer>(event)) {
return createDescriptionInfo<CallAnswer>(event, localUser, room_id);
} else if (std::holds_alternative<CallHangUp>(event)) {
return createDescriptionInfo<CallHangUp>(event, localUser, room_id);
} else if (std::holds_alternative<mtx::events::Sticker>(event)) {
return createDescriptionInfo<mtx::events::Sticker>(event, localUser, room_id);
} else if (auto msg = std::get_if<Encrypted>(&event); msg != nullptr) {
const auto sender = QString::fromStdString(msg->sender);
const auto username = cache::displayName(room_id, sender);
const auto ts = QDateTime::fromMSecsSinceEpoch(msg->origin_server_ts);
DescInfo info;
info.userid = sender;
info.body = QString(" %1").arg(
messageDescription<Encrypted>(username, "", sender == localUser));
info.timestamp = msg->origin_server_ts;
info.descriptiveTime = utils::descriptiveTime(ts);
info.event_id = QString::fromStdString(msg->event_id);
info.datetime = ts;
return info;
}
return DescInfo{};
}
QString
utils::firstChar(const QString &input)
{
if (input.isEmpty())
return input;
for (auto const &c : input.toUcs4()) {
if (QString::fromUcs4(&c, 1) != QString("#"))
return QString::fromUcs4(&c, 1).toUpper();
}
return QString::fromUcs4(&input.toUcs4().at(0), 1).toUpper();
}
QString
utils::humanReadableFileSize(uint64_t bytes)
{
constexpr static const char *units[] = {"B", "KiB", "MiB", "GiB", "TiB"};
constexpr static const int length = sizeof(units) / sizeof(units[0]);
int u = 0;
double size = static_cast<double>(bytes);
while (size >= 1024.0 && u < length) {
++u;
size /= 1024.0;
}
return QString::number(size, 'g', 4) + ' ' + units[u];
}
int
utils::levenshtein_distance(const std::string &s1, const std::string &s2)
{
const int nlen = s1.size();
const int hlen = s2.size();
if (hlen == 0)
return -1;
if (nlen == 1)
return s2.find(s1);
std::vector<int> row1(hlen + 1, 0);
for (int i = 0; i < nlen; ++i) {
std::vector<int> row2(1, i + 1);
for (int j = 0; j < hlen; ++j) {
const int cost = s1[i] != s2[j];
row2.push_back(
std::min(row1[j + 1] + 1, std::min(row2[j] + 1, row1[j] + cost)));
}
row1.swap(row2);
}
return *std::min_element(row1.begin(), row1.end());
}
QString
utils::event_body(const mtx::events::collections::TimelineEvents &e)
{
using namespace mtx::events;
if (auto ev = std::get_if<RoomEvent<msg::Audio>>(&e); ev != nullptr)
return QString::fromStdString(ev->content.body);
if (auto ev = std::get_if<RoomEvent<msg::Emote>>(&e); ev != nullptr)
return QString::fromStdString(ev->content.body);
if (auto ev = std::get_if<RoomEvent<msg::File>>(&e); ev != nullptr)
return QString::fromStdString(ev->content.body);
if (auto ev = std::get_if<RoomEvent<msg::Image>>(&e); ev != nullptr)
return QString::fromStdString(ev->content.body);
if (auto ev = std::get_if<RoomEvent<msg::Notice>>(&e); ev != nullptr)
return QString::fromStdString(ev->content.body);
if (auto ev = std::get_if<RoomEvent<msg::Text>>(&e); ev != nullptr)
return QString::fromStdString(ev->content.body);
if (auto ev = std::get_if<RoomEvent<msg::Video>>(&e); ev != nullptr)
return QString::fromStdString(ev->content.body);
return "";
}
QPixmap
utils::scaleImageToPixmap(const QImage &img, int size)
{
if (img.isNull())
return QPixmap();
// Deprecated in 5.13: const double sz =
// std::ceil(QApplication::desktop()->screen()->devicePixelRatioF() * (double)size);
const double sz =
std::ceil(QGuiApplication::primaryScreen()->devicePixelRatio() * (double)size);
return QPixmap::fromImage(
img.scaled(sz, sz, Qt::IgnoreAspectRatio, Qt::SmoothTransformation));
}
QPixmap
utils::scaleDown(uint64_t maxWidth, uint64_t maxHeight, const QPixmap &source)
{
if (source.isNull())
return QPixmap();
const double widthRatio = (double)maxWidth / (double)source.width();
const double heightRatio = (double)maxHeight / (double)source.height();
const double minAspectRatio = std::min(widthRatio, heightRatio);
// Size of the output image.
int w, h = 0;
if (minAspectRatio > 1) {
w = source.width();
h = source.height();
} else {
w = source.width() * minAspectRatio;
h = source.height() * minAspectRatio;
}
return source.scaled(w, h, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
}
QString
utils::mxcToHttp(const QUrl &url, const QString &server, int port)
{
auto mxcParts = mtx::client::utils::parse_mxc_url(url.toString().toStdString());
return QString("https://%1:%2/_matrix/media/r0/download/%3/%4")
.arg(server)
.arg(port)
.arg(QString::fromStdString(mxcParts.server))
.arg(QString::fromStdString(mxcParts.media_id));
}
QString
utils::humanReadableFingerprint(const std::string &ed25519)
{
return humanReadableFingerprint(QString::fromStdString(ed25519));
}
QString
utils::humanReadableFingerprint(const QString &ed25519)
{
QStringList fingerprintList;
for (int i = 0; i < ed25519.length(); i = i + 4) {
fingerprintList << ed25519.mid(i, 4);
}
return fingerprintList.join(" ");
}
QString
utils::linkifyMessage(const QString &body)
{
// Convert to valid XML.
auto doc = body;
doc.replace(conf::strings::url_regex, conf::strings::url_html);
return doc;
}
QString
utils::escapeBlacklistedHtml(const QString &rawStr)
{
static const std::array allowedTags = {
"font", "/font", "del", "/del", "h1", "/h1", "h2", "/h2",
"h3", "/h3", "h4", "/h4", "h5", "/h5", "h6", "/h6",
"blockquote", "/blockquote", "p", "/p", "a", "/a", "ul", "/ul",
"ol", "/ol", "sup", "/sup", "sub", "/sub", "li", "/li",
"b", "/b", "i", "/i", "u", "/u", "strong", "/strong",
"em", "/em", "strike", "/strike", "code", "/code", "hr", "/hr",
"br", "br/", "div", "/div", "table", "/table", "thead", "/thead",
"tbody", "/tbody", "tr", "/tr", "th", "/th", "td", "/td",
"caption", "/caption", "pre", "/pre", "span", "/span", "img", "/img"};
QByteArray data = rawStr.toUtf8();
QByteArray buffer;
const size_t length = data.size();
buffer.reserve(length);
bool escapingTag = false;
for (size_t pos = 0; pos != length; ++pos) {
switch (data.at(pos)) {
case '<': {
bool oneTagMatched = false;
size_t endPos = std::min(static_cast<size_t>(data.indexOf('>', pos)),
static_cast<size_t>(data.indexOf(' ', pos)));
auto mid = data.mid(pos + 1, endPos - pos - 1);
for (const auto &tag : allowedTags) {
// TODO: Check src and href attribute
if (mid.toLower() == tag) {
oneTagMatched = true;
}
}
if (oneTagMatched)
buffer.append('<');
else {
escapingTag = true;
buffer.append("&lt;");
}
break;
}
case '>':
if (escapingTag) {
buffer.append("&gt;");
escapingTag = false;
} else
buffer.append('>');
break;
default:
buffer.append(data.at(pos));
break;
}
}
return QString::fromUtf8(buffer);
}
QString
utils::markdownToHtml(const QString &text)
{
const auto str = text.toUtf8();
const char *tmp_buf = cmark_markdown_to_html(str.constData(), str.size(), CMARK_OPT_UNSAFE);
// Copy the null terminated output buffer.
std::string html(tmp_buf);
// The buffer is no longer needed.
free((char *)tmp_buf);
auto result = linkifyMessage(escapeBlacklistedHtml(QString::fromStdString(html))).trimmed();
if (result.count("<p>") == 1 && result.startsWith("<p>") && result.endsWith("</p>")) {
result = result.mid(3, result.size() - 3 - 4);
}
return result;
}
QString
utils::getFormattedQuoteBody(const RelatedInfo &related, const QString &html)
{
auto getFormattedBody = [related]() -> QString {
using MsgType = mtx::events::MessageType;
switch (related.type) {
case MsgType::File: {
return "sent a file.";
}
case MsgType::Image: {
return "sent an image.";
}
case MsgType::Audio: {
return "sent an audio file.";
}
case MsgType::Video: {
return "sent a video";
}
default: {
return related.quoted_formatted_body;
}
}
};
return QString("<mx-reply><blockquote><a "
"href=\"https://matrix.to/#/%1/%2\">In reply "
"to</a> <a href=\"https://matrix.to/#/%3\">%4</a><br"
"/>%5</blockquote></mx-reply>")
.arg(related.room,
QString::fromStdString(related.related_event),
related.quoted_user,
related.quoted_user,
getFormattedBody()) +
html;
}
QString
utils::getQuoteBody(const RelatedInfo &related)
{
using MsgType = mtx::events::MessageType;
switch (related.type) {
case MsgType::File: {
return "sent a file.";
}
case MsgType::Image: {
return "sent an image.";
}
case MsgType::Audio: {
return "sent an audio file.";
}
case MsgType::Video: {
return "sent a video";
}
default: {
return related.quoted_body;
}
}
}
QString
utils::linkColor()
{
QSettings settings;
// Default to system theme if QT_QPA_PLATFORMTHEME var is set.
QString defaultTheme =
QProcessEnvironment::systemEnvironment().value("QT_QPA_PLATFORMTHEME", "").isEmpty()
? "light"
: "system";
const auto theme = settings.value("user/theme", defaultTheme).toString();
if (theme == "light") {
return "#0077b5";
} else if (theme == "dark") {
return "#38A3D8";
} else {
return QPalette().color(QPalette::Link).name();
}
}
uint32_t
utils::hashQString(const QString &input)
{
uint32_t hash = 0;
for (int i = 0; i < input.length(); i++) {
hash = input.at(i).digitValue() + ((hash << 5) - hash);
}
return hash;
}
QString
utils::generateContrastingHexColor(const QString &input, const QString &background)
{
const QColor backgroundCol(background);
const qreal backgroundLum = luminance(background);
// Create a color for the input
auto hash = hashQString(input);
// create a hue value based on the hash of the input.
auto userHue = static_cast<int>(qAbs(hash % 360));
// start with moderate saturation and lightness values.
auto sat = 220;
auto lightness = 125;
// converting to a QColor makes the luminance calc easier.
QColor inputColor = QColor::fromHsl(userHue, sat, lightness);
// calculate the initial luminance and contrast of the
// generated color. It's possible that no additional
// work will be necessary.
auto lum = luminance(inputColor);
auto contrast = computeContrast(lum, backgroundLum);
// If the contrast doesn't meet our criteria,
// try again and again until they do by modifying first
// the lightness and then the saturation of the color.
int iterationCount = 9;
while (contrast < 5) {
// if our lightness is at it's bounds, try changing
// saturation instead.
if (lightness == 242 || lightness == 13) {
qreal newSat = qBound(26.0, sat * 1.25, 242.0);
inputColor.setHsl(userHue, qFloor(newSat), lightness);
auto tmpLum = luminance(inputColor);
auto higherContrast = computeContrast(tmpLum, backgroundLum);
if (higherContrast > contrast) {
contrast = higherContrast;
sat = newSat;
} else {
newSat = qBound(26.0, sat / 1.25, 242.0);
inputColor.setHsl(userHue, qFloor(newSat), lightness);
tmpLum = luminance(inputColor);
auto lowerContrast = computeContrast(tmpLum, backgroundLum);
if (lowerContrast > contrast) {
contrast = lowerContrast;
sat = newSat;
}
}
} else {
qreal newLightness = qBound(13.0, lightness * 1.25, 242.0);
inputColor.setHsl(userHue, sat, qFloor(newLightness));
auto tmpLum = luminance(inputColor);
auto higherContrast = computeContrast(tmpLum, backgroundLum);
// Check to make sure we have actually improved contrast
if (higherContrast > contrast) {
contrast = higherContrast;
lightness = newLightness;
// otherwise, try going the other way instead.
} else {
newLightness = qBound(13.0, lightness / 1.25, 242.0);
inputColor.setHsl(userHue, sat, qFloor(newLightness));
tmpLum = luminance(inputColor);
auto lowerContrast = computeContrast(tmpLum, backgroundLum);
if (lowerContrast > contrast) {
contrast = lowerContrast;
lightness = newLightness;
}
}
}
// don't loop forever, just give up at some point!
// Someone smart may find a better solution
if (--iterationCount < 0)
break;
}
// get the hex value of the generated color.
auto colorHex = inputColor.name();
return colorHex;
}
qreal
utils::computeContrast(const qreal &one, const qreal &two)
{
auto ratio = (one + 0.05) / (two + 0.05);
if (two > one) {
ratio = 1 / ratio;
}
return ratio;
}
qreal
utils::luminance(const QColor &col)
{
int colRgb[3] = {col.red(), col.green(), col.blue()};
qreal lumRgb[3];
for (int i = 0; i < 3; i++) {
qreal v = colRgb[i] / 255.0;
v <= 0.03928 ? lumRgb[i] = v / 12.92 : lumRgb[i] = qPow((v + 0.055) / 1.055, 2.4);
}
auto lum = lumRgb[0] * 0.2126 + lumRgb[1] * 0.7152 + lumRgb[2] * 0.0722;
return lum;
}
void
utils::centerWidget(QWidget *widget, QWidget *parent)
{
auto findCenter = [childRect = widget->rect()](QRect hostRect) -> QPoint {
return QPoint(hostRect.center().x() - (childRect.width() * 0.5),
hostRect.center().y() - (childRect.height() * 0.5));
};
if (parent) {
widget->move(parent->window()->frameGeometry().topLeft() +
parent->window()->rect().center() - widget->rect().center());
return;
}
// Deprecated in 5.13: widget->move(findCenter(QApplication::desktop()->screenGeometry()));
widget->move(findCenter(QGuiApplication::primaryScreen()->geometry()));
}
void
utils::restoreCombobox(QComboBox *combo, const QString &value)
{
for (auto i = 0; i < combo->count(); ++i) {
if (value == combo->itemText(i)) {
combo->setCurrentIndex(i);
break;
}
}
}
QImage
utils::readImage(QByteArray *data)
{
QBuffer buf(data);
QImageReader reader(&buf);
reader.setAutoTransform(true);
return reader.read();
}