Differential D25191 Diff 69752 kcms/keyboard/tastenbrett/xkbobject.cpp

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kcms/keyboard/tastenbrett/xkbobject.cpp

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		1		/*
		2		Copyright 2019 Harald Sitter <sitter@kde.org>
		3
		4		This program is free software; you can redistribute it and/or
		5		modify it under the terms of the GNU General Public License as
		6		published by the Free Software Foundation; either version 2 of
		7		the License or (at your option) version 3 or any later version
		8		accepted by the membership of KDE e.V. (or its successor approved
		9		by the membership of KDE e.V.), which shall act as a proxy
		10		defined in Section 14 of version 3 of the license.
		11
		12		This program is distributed in the hope that it will be useful,
		13		but WITHOUT ANY WARRANTY; without even the implied warranty of
		14		MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		15		GNU General Public License for more details.
		16
		17		You should have received a copy of the GNU General Public License
		18		along with this program. If not, see <http://www.gnu.org/licenses/>.
		19		*/
		20
		21		#include "xkbobject.h"
		22
		23		#include <QDebug>
		24		#include <QFile>
		25		#include <QHash>
		26
		27		// hash of name to color from rgb.txt
		28		static QHash<QString, QColor> x11Colors()
		29		{
		30		QHash<QString, QColor> colors;
		31
		32		static QStringList txtPaths = {
		33		"/usr/share/X11/rgb.txt"
		34		};
		35
		36		for (const auto &path : txtPaths) {
		37		QFile file(path);
		38		if (!file.open(QIODevice::ReadOnly)) {
		39		continue;
		40		}
		41
		42		QByteArray line;
		43		QStringList list;
		44		while (!file.atEnd()) {
		45		line = file.readLine();
		46
		47		int red = 0;
		48		int green = 0;
		49		int blue = 0;
		50		int pos = 0;
		51		if (sscanf(line, "%d %d %d%n", &red, &green, &blue, &pos) == 3) {
		52		const QString name = line.mid(pos).trimmed();
		53		const QColor color(red, green, blue);
		54		if (color.isValid()) {
		55		colors[name] = color;
		56		}
		57		}
		58		}
		59
		60		break; // found a file
		61		}
		62
		63		return colors;
		64		}
		65
		66		QColor XkbObject::fromXKBColor(const XkbColorRec &color)
		67		{
		68		// Unfortunately the color spec is explicitly not defined, so
		69		// it's up to the xserver implementation. Also unfortunate
		70		// is that Qt no longer seems to have capabilities of
		71		// natively handling x11 colors specs, so this is literally
		72		// a shot in the dark.
		73		// XParseColor is how one would get that data, but then we need
		74		// a color map, and for that we need a visual and a window....
		75		// all in all a pile of crap.
		76		//
		77		// https://en.wikipedia.org/wiki/X11_color_names
		78
		79		static auto colors = x11Colors();
		80
		81		const QString spec = QString::fromUtf8(color.spec);
		82
		83		// Resolve through rgb.txt
		84		QColor ret = colors.value(spec);
		85		if (ret.isValid()) {
		86		return ret;
		87		}
		88
		89		// Fall back to maybe resolve it internally somehow.
		90		// This will pretty much never work as most colors aren't
		91		// straight forward black, green, etc.
		92		ret.setNamedColor(spec);
		93		if (ret.isValid()) {
		94		return ret;
		95		}
		96
		97		// NB: we implicitly rely on some values not mapping!
		98		// e.g. doodad indicators may have green30 as off_color
		99		// green30 is not a valid color, so this is implicitly
		100		// meant to go nowhere as otherwise on would be green and off too
		101		// ... quite the mess.
		102
		103		qDebug() << "failed to map x11 color!" << color.spec;
		104
		105		return QColor(Qt::gray);
		106		}