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Theme.cpp
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Theme.cpp
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/*
* This file is part of the KDE project
* SPDX-FileCopyrightText: 2014 Arjen Hiemstra <ahiemstra@heimr.nl>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "Theme.h"
#include <QApplication>
#include <QColor>
#include <QDebug>
#include <QDir>
#include <QFile>
#include <QFont>
#include <QFontDatabase>
#include <QQmlComponent>
#include <QStandardPaths>
#include <QStringList>
#include <QUrl>
#include <QWidget>
#include <KIconLoader>
#include "QmlGlobalEngine.h"
#ifdef Q_OS_WIN
#include <windows.h>
#endif
class Theme::Private
{
public:
Private()
: inheritedTheme(nullptr)
, iconPath("icons/")
, imagePath("images/")
, fontPath("fonts/")
, fontsAdded(false)
, lineCountLandscape(40)
, lineCountPortrait(70)
{
}
void rebuildFontCache();
QString id;
QString name;
QString inherits;
Theme *inheritedTheme;
QVariantMap colors;
QVariantMap sizes;
QVariantMap fonts;
QString basePath;
QString iconPath;
QString imagePath;
QString fontPath;
QHash<QString, QColor> colorCache;
QHash<QString, QFont> fontMap;
bool fontsAdded;
QList<int> addedFonts;
int lineCountLandscape;
int lineCountPortrait;
};
Theme::Theme(QObject *parent)
: QObject(parent)
, d(new Private)
{
qApp->installEventFilter(this);
}
Theme::~Theme()
{
QFontDatabase db;
Q_FOREACH (int id, d->addedFonts) {
db.removeApplicationFont(id);
}
delete d;
}
QString Theme::id() const
{
return d->id;
}
void Theme::setId(const QString &newValue)
{
if (newValue != d->id) {
d->id = newValue;
const QString qmlFileSubPath = QStringLiteral("calligragemini/themes/") + d->id + QStringLiteral("/theme.qml");
const QString qmlFileFullPath = QStandardPaths::locate(QStandardPaths::GenericDataLocation, qmlFileSubPath);
d->basePath = QFileInfo(qmlFileFullPath).dir().absolutePath();
emit idChanged();
}
}
QString Theme::name() const
{
return d->name;
}
void Theme::setName(const QString &newValue)
{
if (newValue != d->name) {
d->name = newValue;
emit nameChanged();
}
}
QString Theme::inherits() const
{
return d->inherits;
}
void Theme::setInherits(const QString &newValue)
{
if (newValue != d->inherits) {
if (d->inheritedTheme) {
delete d->inheritedTheme;
d->inheritedTheme = nullptr;
}
d->inherits = newValue;
if (!d->inherits.isEmpty()) {
d->inheritedTheme = Theme::load(d->inherits, this);
connect(d->inheritedTheme, &Theme::fontCacheRebuilt, this, &Theme::fontCacheRebuilt);
}
emit inheritsChanged();
}
}
QVariantMap Theme::colors() const
{
return d->colors;
}
void Theme::setColors(const QVariantMap &newValue)
{
if (newValue != d->colors) {
d->colors = newValue;
emit colorsChanged();
}
}
QColor Theme::color(const QString &name)
{
if (d->colorCache.contains(name))
return d->colorCache.value(name);
QStringList parts = name.split('/');
QColor result;
if (!parts.isEmpty()) {
QVariantMap map = d->colors;
QString current = parts.takeFirst();
while (map.contains(current)) {
QVariant value = map.value(current);
if (value.type() == QVariant::Map) {
if (parts.isEmpty())
break;
map = value.toMap();
current = parts.takeFirst();
} else {
result = value.value<QColor>();
map = QVariantMap();
}
}
}
if (!result.isValid() && d->inheritedTheme) {
result = d->inheritedTheme->color(name);
}
if (!result.isValid()) {
qWarning() << "Unable to find color" << name;
} else {
d->colorCache.insert(name, result);
}
return result;
}
QVariantMap Theme::sizes() const
{
return d->sizes;
}
void Theme::setSizes(const QVariantMap &newValue)
{
if (newValue != d->sizes) {
d->sizes = newValue;
emit sizesChanged();
}
}
float Theme::size(const QString &name)
{
Q_UNUSED(name);
return 0.f;
}
QVariantMap Theme::fonts() const
{
return d->fonts;
}
void Theme::setFonts(const QVariantMap &newValue)
{
if (newValue != d->fonts) {
d->fonts = newValue;
d->fontMap.clear();
emit fontsChanged();
}
}
QFont Theme::font(const QString &name)
{
if (!d->fontsAdded) {
QDir fontDir(d->basePath + '/' + d->fontPath);
QStringList entries = fontDir.entryList(QDir::Files);
QFontDatabase db;
Q_FOREACH (const QString &entry, entries) {
d->addedFonts.append(db.addApplicationFont(fontDir.absoluteFilePath(entry)));
}
d->fontsAdded = true;
}
if (d->fontMap.isEmpty()) {
d->rebuildFontCache();
}
if (d->fontMap.contains(name))
return d->fontMap.value(name);
if (d->inheritedTheme)
return d->inheritedTheme->font(name);
qWarning() << "Unable to find font" << name;
return QFont();
}
QString Theme::fontPath() const
{
return d->fontPath;
}
void Theme::setFontPath(const QString &newValue)
{
if (newValue != d->fontPath) {
if (!d->addedFonts.isEmpty()) {
QFontDatabase db;
Q_FOREACH (int id, d->addedFonts) {
db.removeApplicationFont(id);
}
d->addedFonts.clear();
}
d->fontPath = newValue;
d->fontsAdded = false;
emit fontPathChanged();
}
}
QString Theme::iconPath() const
{
return d->iconPath;
}
void Theme::setIconPath(const QString &newValue)
{
if (newValue != d->iconPath) {
d->iconPath = newValue;
emit iconPathChanged();
}
}
QUrl Theme::icon(const QString &name, bool useSystemFallback)
{
QString url = QString("%1/%2/%3.svg").arg(d->basePath, d->iconPath, name);
if (!QFile::exists(url)) {
if (d->inheritedTheme) {
return d->inheritedTheme->icon(name);
} else {
if (useSystemFallback) {
url = KIconLoader::global()->iconPath(name, -128);
qWarning() << "Attempting to use a system fallback icon" << url;
} else {
qWarning() << "Unable to find icon" << url;
}
}
}
return QUrl::fromLocalFile(url);
}
QIcon Theme::iconActual(const QString &name)
{
return QIcon(icon(name).toLocalFile());
}
QString Theme::imagePath() const
{
return d->imagePath;
}
void Theme::setImagePath(const QString &newValue)
{
if (newValue != d->imagePath) {
d->imagePath = newValue;
emit imagePathChanged();
}
}
QUrl Theme::image(const QString &name)
{
QString url = QString("%1/%2/%3").arg(d->basePath, d->imagePath, name);
if (!QFile::exists(url)) {
if (d->inheritedTheme) {
return d->inheritedTheme->image(name);
} else {
qWarning() << "Unable to find image" << url;
}
}
return QUrl::fromLocalFile(url);
}
Theme *Theme::load(const QString &id, QObject *parent)
{
QString qml;
// Ugly hacky stuff for making things work on Windows
#ifdef Q_OS_WIN
QDir appdir(qApp->applicationDirPath());
// Corrects for mismatched case errors in path (qtdeclarative fails to load)
wchar_t buffer[1024];
QString absolute = appdir.absolutePath();
DWORD rv = ::GetShortPathName((wchar_t *)absolute.utf16(), buffer, 1024);
rv = ::GetLongPathName(buffer, buffer, 1024);
QString correctedPath((QChar *)buffer);
appdir.setPath(correctedPath);
// for now, the app in bin/ and we still use the env.bat script
appdir.cdUp();
qml = QString("%1/bin/data/calligragemini/themes/%2/theme.qml").arg(appdir.canonicalPath(), id);
#else
const QString qmlFileSubPath = QStringLiteral("calligragemini/themes/") + id + QStringLiteral("/theme.qml");
qml = QStandardPaths::locate(QStandardPaths::GenericDataLocation, qmlFileSubPath);
#endif
QQmlComponent themeComponent(QmlGlobalEngine::instance()->engine(), parent);
themeComponent.loadUrl(QUrl::fromLocalFile(qml));
if (themeComponent.isError()) {
qWarning() << themeComponent.errorString();
return nullptr;
}
Theme *theme = qobject_cast<Theme *>(themeComponent.create());
if (!theme) {
qWarning() << "Failed to create theme instance!";
return nullptr;
}
return theme;
}
bool Theme::eventFilter(QObject *target, QEvent *event)
{
if (target == qApp->activeWindow() && target->inherits("QMainWindow") && event->type() == QEvent::Resize) {
d->rebuildFontCache();
emit fontCacheRebuilt();
}
return QObject::eventFilter(target, event);
}
int Theme::adjustedPixel(const int &pixel) const
{
if (!qApp->activeWindow())
return 0;
// If we are in portrait mode, we still assume 1080p for font size purposes
int width = qApp->activeWindow()->height() > qApp->activeWindow()->width() ? qApp->activeWindow()->height() : qApp->activeWindow()->width();
// The pixel size is based on a 1080p screen, and it is accepted that the window size
// will vary slightly on there, depending on whether or not we are full screened (so
// we accept up to 10 pixels less width)
float sizeAdjustment = 1;
if (width > 1920 || width < 1910)
sizeAdjustment = width / 1920.f;
return pixel * sizeAdjustment;
}
void Theme::Private::rebuildFontCache()
{
fontMap.clear();
QFontDatabase db;
for (QVariantMap::ConstIterator itr = fonts.constBegin(); itr != fonts.constEnd(); ++itr) {
QVariantMap map = itr->toMap();
if (map.isEmpty())
continue;
QFont font = db.font(map.value("family").toString(), map.value("style", "Regular").toString(), 10);
if (font.isCopyOf(qApp->font()))
qWarning() << "Could not find font" << map.value("family") << "with style" << map.value("style", "Regular");
if (map.contains("pixelSize")) {
// If we are in portrait mode, we still assume 1080p for font size purposes
int width = qApp->activeWindow()->height() > qApp->activeWindow()->width() ? qApp->activeWindow()->height() : qApp->activeWindow()->width();
// The pixel size is based on a 1080p screen, and it is accepted that the window size
// will vary slightly on there, depending on whether or not we are full screened (so
// we accept up to 10 pixels less width)
float sizeAdjustment = 1;
if (width > 1920 || width < 1910)
sizeAdjustment = width / 1920.f;
font.setPixelSize(map.value("pixelSize").toInt() * sizeAdjustment);
} else {
float lineCount = qApp->activeWindow()->height() > qApp->activeWindow()->width() ? lineCountPortrait : lineCountLandscape;
float lineHeight = qApp->activeWindow()->height() / lineCount;
font.setPixelSize(lineHeight * map.value("size", 1).toFloat());
}
fontMap.insert(itr.key(), font);
}
}