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/*
* Copyright (C) 2014 Hong Jen Yee (PCMan) <pcman.tw@gmail.com>
* LXQt project: https://lxqt-project.org/
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "fontconfigfile.h"
#include <QTextStream>
#include <QByteArray>
#include <QFile>
#include <QDir>
#include <QDesktopServices>
#include <QStringBuilder>
#include <QDomDocument>
#include <QTimer>
#include <QDebug>
#include <QStandardPaths>
FontConfigFile::FontConfigFile(QObject* parent):
QObject(parent),
mAntialias(true),
mHinting(true),
mSubpixel("rgb"),
mHintStyle("hintslight"),
mDpi(96),
mAutohint(false),
mSaveTimer(nullptr)
{
mDirPath = QString::fromLocal8Bit(qgetenv("XDG_CONFIG_HOME"));
QString homeDir = QStandardPaths::writableLocation(QStandardPaths::HomeLocation);
if(mDirPath.isEmpty())
mDirPath = homeDir + QStringLiteral("/.config");
mDirPath += QLatin1String("/fontconfig");
mFilePath = mDirPath + QStringLiteral("/fonts.conf");
load();
}
FontConfigFile::~FontConfigFile()
{
if(mSaveTimer) // has pending save request
{
delete mSaveTimer;
mSaveTimer = nullptr;
save();
}
}
void FontConfigFile::setAntialias(bool value)
{
mAntialias = value;
queueSave();
}
void FontConfigFile::setSubpixel(QByteArray value)
{
mSubpixel = value;
queueSave();
}
void FontConfigFile::setHinting(bool value)
{
mHinting = value;
queueSave();
}
void FontConfigFile::setHintStyle(QByteArray value)
{
mHintStyle = value;
queueSave();
}
void FontConfigFile::setDpi(int value)
{
mDpi = value;
queueSave();
}
void FontConfigFile::setAutohint(bool value)
{
mAutohint = value;
queueSave();
}
void FontConfigFile::load()
{
QFile file(mFilePath);
if(file.open(QIODevice::ReadOnly))
{
QByteArray buffer = file.readAll();
file.close();
if(buffer.contains("lxqt-config-appearance")) // the config file is created by us
{
// doing full xml parsing is over-kill. let's use some simpler brute-force methods.
QDomDocument doc;
doc.setContent(&file);
file.close();
QDomElement docElem = doc.documentElement();
QDomNodeList editNodes = docElem.elementsByTagName(QStringLiteral("edit"));
for(int i = 0; i < editNodes.count(); ++i)
{
QDomElement editElem = editNodes.at(i).toElement();
QByteArray name = editElem.attribute(QStringLiteral("name")).toLatin1();
if(name == "antialias")
{
QString value = editElem.firstChildElement(QStringLiteral("bool")).text();
mAntialias = value[0] == QLatin1Char('t') ? true : false;
}
else if(name == "rgba")
{
QString value = editElem.firstChildElement(QStringLiteral("const")).text();
mSubpixel = value.toLatin1();
}
else if(name == "hinting")
{
QString value = editElem.firstChildElement(QStringLiteral("bool")).text();
mHinting = value[0] == QLatin1Char('t') ? true : false;
}
else if(name == "hintstyle")
{
QString value = editElem.firstChildElement(QStringLiteral("const")).text();
mHintStyle = value.toLatin1();
}
else if(name == "dpi")
{
QString value = editElem.firstChildElement(QStringLiteral("double")).text();
mDpi = value.toInt();
}
else if(name == "autohint")
{
QString value = editElem.firstChildElement(QStringLiteral("bool")).text();
mAutohint = value[0] == QLatin1Char('t') ? true : false;
}
}
}
else // the config file is created by others => make a backup and write our config
{
QFile backup(mFilePath + QStringLiteral(".bak"));
if(backup.open(QIODevice::WriteOnly))
{
backup.write(buffer);
backup.close();
}
queueSave(); // overwrite with our file
}
}
}
void FontConfigFile::save()
{
if(mSaveTimer)
{
mSaveTimer->deleteLater();
mSaveTimer = nullptr;
}
QFile file(mFilePath);
QDir().mkdir(mDirPath);
// References: https://wiki.archlinux.org/index.php/Font_Configuration
if(file.open(QIODevice::WriteOnly))
{
QTextStream s(&file);
s <<
"<?xml version=\"1.0\"?>\n"
"<!DOCTYPE fontconfig SYSTEM \"fonts.dtd\">\n"
"<!-- created by lxqt-config-appearance (DO NOT EDIT!) -->\n"
"<fontconfig>\n"
" <include ignore_missing=\"yes\">conf.d</include>\n"
" <match target=\"font\">\n"
" <edit name=\"antialias\" mode=\"assign\">\n"
" <bool>" << (mAntialias ? "true" : "false") << "</bool>\n"
" </edit>\n"
" </match>\n"
" <match target=\"font\">\n"
" <edit name=\"rgba\" mode=\"assign\">\n"
" <const>" << mSubpixel << "</const>\n"
" </edit>\n"
" </match>\n"
" <match target=\"font\">\n"
" <edit name=\"lcdfilter\" mode=\"assign\">\n"
" <const>lcddefault</const>\n"
" </edit>\n"
" </match>\n"
" <match target=\"font\">\n"
" <edit name=\"hinting\" mode=\"assign\">\n"
" <bool>" << (mHinting ? "true" : "false") << "</bool>\n"
" </edit>\n"
" </match>\n"
" <match target=\"font\">\n"
" <edit name=\"hintstyle\" mode=\"assign\">\n"
" <const>" << mHintStyle << "</const>\n"
" </edit>\n"
" </match>\n"
" <match target=\"font\">\n"
" <edit name=\"autohint\" mode=\"assign\">\n"
" <bool>" << (mAutohint ? "true" : "false") << "</bool>\n"
" </edit>\n"
" </match>\n"
" <match target=\"pattern\">\n"
" <edit name=\"dpi\" mode=\"assign\">\n"
" <double>" << mDpi << "</double>\n"
" </edit>\n"
" </match>\n"
"</fontconfig>";
s.flush();
file.close();
}
}
void FontConfigFile::queueSave()
{
if(mSaveTimer)
mSaveTimer->start(1500);
else
{
mSaveTimer = new QTimer();
mSaveTimer->setSingleShot(true);
connect(mSaveTimer, &QTimer::timeout, this, &FontConfigFile::save);
mSaveTimer->start(1500);
}
}
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