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// SPDX-License-Identifier: GPL-2.0-or-later
#include <list>
#include <set>
#include <utility>
#include <map>
#include <QFontDatabase>
#include <QFontInfo>
#include <QFile>
#include <QTextStream>
#include <QTextCodec>
#include <QLocale>
#include "fqterm_trace.h"
#include "fqterm_font.h"
#include "fqterm_path.h"
#include "fqterm_config.h"
using namespace std;
namespace FQTerm {
namespace Font {
enum Language{US_ENGLISH = 0,
SIMPLIFIED_CHINESE,
LANGUAGE_COUNT };
QString getLanguageName(Language lang) {
switch (lang){
case US_ENGLISH:
return "en_US";
case SIMPLIFIED_CHINESE:
return "zh_CN";
default:
return "C";
}
}
Language getLanguageByName(QString langName) {
if (langName == "zh_CN") {
return SIMPLIFIED_CHINESE;
}
if (langName == "en_US") {
return US_ENGLISH;
}
return LANGUAGE_COUNT;
}
} // namespace Language
typedef set<Font::Language> LanguageSet;
typedef map<QString, pair<QString, LanguageSet> > FontLanguagesList;
typedef map<QString, map<Font::Language, QStringList> > FontSets;
// This function will be called only once.
static const FontSets &getPreferedFontSets() {
static FontSets font_sets;
const QString &res_path = getPath(RESOURCE);
QString filename = res_path + "default_font.conf";
if (!QFile::exists(filename)) {
filename = res_path + "/dict/" + "default_font.conf";
}
QFile file(filename);
if (!file.open(QIODevice::ReadOnly)) {
FQ_TRACE("font", 0) << "Failed to open the default font configurations file:"
<< filename;
return font_sets;
}
QTextStream is;
is.setDevice(&file);
is.setCodec(QTextCodec::codecForName("UTF-8"));
#if defined(WIN32)
QString expected_section = "Windows";
#elif defined(__APPLE__)
QString expected_section = "Apple";
#else
QString expected_section = "Linux";
#endif
QString line;
QString current_section;
while (!is.atEnd()) {
line = is.readLine().trimmed();
if (line.isEmpty() || line[0] == '#') {
continue;
}
if (line.left(1) == "[" && line.right(1) == "]") {
current_section = line.mid(1, line.length() - 2);
continue;
}
if (current_section == expected_section) {
QString en_font = line.section('=', 0, 0).trimmed().toLower();
QString fonts_for_lang = line.section('=', 1).trimmed();
map<Font::Language, QStringList> &font_set = font_sets[en_font];
QString lang = fonts_for_lang.section(":", 0, 0).trimmed();
QString fonts = fonts_for_lang.section(":", 1).trimmed();
QStringList font_list = fonts.split(",", QString::SkipEmptyParts);
for (int i = 0; i < font_list.size(); ++i) {
font_list[i] = font_list[i].trimmed();
}
font_set[Font::getLanguageByName(lang)] = font_list;
}
}
return font_sets;
}
#if 0
//Not used
static int outputAllSystemFonts(const QStringList &fonts) {
if (isAllowedCategory("font", 9)) {
for (int i = 0; i < fonts.size(); ++i) {
FQ_TRACE("font", 9) << "Found a font: "
<< (QFontInfo(QFont(fonts.at(i))).fixedPitch() ?
"fixed-pitch " : "variable-pitch ")
<< fonts.at(i);
}
}
return 0;
}
#endif
static QStringList &getSystemFontFamilies() {
static QStringList list = QFontDatabase().families();
// static int tmp = outputAllSystemFonts(list);
return list;
}
static FontSets &getUserConfigFontSets() {
static FontSets font_sets = getPreferedFontSets();
return font_sets;
}
static QString getEnglishFontFamily() {
static const QStringList &families = getSystemFontFamilies();
static const FontSets &font_sets = getUserConfigFontSets();
static QString en_font_name;
if (!en_font_name.isEmpty()) {
return en_font_name;
}
FontSets::const_iterator it = font_sets.find("default");
if (it != font_sets.end()) {
map<Font::Language, QStringList>::const_iterator itt
= it->second.find(Font::US_ENGLISH);
if (itt != it->second.end()) {
for (int i = 0; i < itt->second.size(); ++i) {
const QString &font = itt->second[i];
if (families.contains(font)) {
en_font_name = font;
break;
}
}
}
}
return en_font_name;
}
static QString getFontFamilyForLang(Font::Language lang) {
static const QStringList &families = getSystemFontFamilies();
static const FontSets &font_sets = getUserConfigFontSets();
const QString en_font_name = getEnglishFontFamily();
if (lang == Font::US_ENGLISH) {
return en_font_name;
}
FontSets::const_iterator it = font_sets.find(en_font_name.toLower());
if (it != font_sets.end()) {
map<Font::Language, QStringList>::const_iterator itt
= it->second.find(lang);
if (itt != it->second.end()) {
for (int i = 0; i < itt->second.size(); ++i) {
const QString &font = itt->second[i];
if (families.contains(font)) {
return font;
} else {
FQ_TRACE("font", 5) << "Font " << font << " for "
<< en_font_name << " not found.";
}
}
}
} else {
FQ_TRACE("font", 3) << "NO fontset for " << en_font_name << " found.";
}
return en_font_name;
}
QString getDefaultFontFamilyForLanguage(bool isEnglish) {
Font::Language lang = isEnglish ? Font::US_ENGLISH : Font::SIMPLIFIED_CHINESE;
static map<Font::Language, QString> langs_fonts_list;
map<Font::Language, QString>::iterator it = langs_fonts_list.find(lang);
if (it == langs_fonts_list.end()) {
langs_fonts_list.insert(
make_pair(lang, getFontFamilyForLang(lang)));
it = langs_fonts_list.find(lang);
FQ_TRACE("font", 3) << "Default font for "
<< Font::getLanguageName(lang)
<< " is: "
<< it->second
<< " (" << it->second.size() << ")";
}
return it->second;
}
#if 0
//Not used.
static Font::Language getCurrentSystemLanguage() {
if (QLocale::system().language() == QLocale::Chinese) {
return Font::SIMPLIFIED_CHINESE;
}
return Font::US_ENGLISH;
}
#endif
} // namespace FQTerm
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