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libqtxdg-packaging/xdgiconloader/xdgiconloader.cpp

937 lines
33 KiB

/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QT_NO_ICON
#include "xdgiconloader_p.h"
#include <private/qguiapplication_p.h>
#include <private/qicon_p.h>
#include <QtGui/QIconEnginePlugin>
#include <QtGui/QPixmapCache>
#include <qpa/qplatformtheme.h>
#include <QtGui/QIconEngine>
#include <QtGui/QPalette>
#include <QtCore/qmath.h>
#include <QtCore/QList>
#include <QtCore/QDir>
#include <QtCore/QSettings>
#include <QtGui/QPainter>
#include <QImageReader>
#include <QXmlStreamReader>
#ifdef Q_DEAD_CODE_FROM_QT4_MAC
#include <private/qt_cocoa_helpers_mac_p.h>
#endif
#include <private/qhexstring_p.h>
//QT_BEGIN_NAMESPACE
Q_GLOBAL_STATIC(XdgIconLoader, iconLoaderInstance)
/* Theme to use in last resort, if the theme does not have the icon, neither the parents */
static QString fallbackTheme()
{
if (const QPlatformTheme *theme = QGuiApplicationPrivate::platformTheme()) {
const QVariant themeHint = theme->themeHint(QPlatformTheme::SystemIconFallbackThemeName);
if (themeHint.isValid()) {
const QString theme = themeHint.toString();
if (theme != QLatin1String("hicolor"))
return theme;
}
}
return QString();
}
#ifdef QT_NO_LIBRARY
static bool gSupportsSvg = false;
#else
static bool gSupportsSvg = true;
#endif //QT_NO_LIBRARY
void XdgIconLoader::setFollowColorScheme(bool enable)
{
if (m_followColorScheme != enable)
{
QIconLoader::instance()->invalidateKey();
m_followColorScheme = enable;
}
}
XdgIconLoader *XdgIconLoader::instance()
{
QIconLoader::instance()->ensureInitialized();
return iconLoaderInstance();
}
/*!
\class QIconCacheGtkReader
\internal
Helper class that reads and looks up into the icon-theme.cache generated with
gtk-update-icon-cache. If at any point we detect a corruption in the file
(because the offsets point at wrong locations for example), the reader
is marked as invalid.
*/
class QIconCacheGtkReader
{
public:
explicit QIconCacheGtkReader(const QString &themeDir);
QVector<const char *> lookup(const QStringRef &);
bool isValid() const { return m_isValid; }
private:
QFile m_file;
const unsigned char *m_data;
quint64 m_size;
bool m_isValid;
quint16 read16(uint offset)
{
if (offset > m_size - 2 || (offset & 0x1)) {
m_isValid = false;
return 0;
}
return m_data[offset+1] | m_data[offset] << 8;
}
quint32 read32(uint offset)
{
if (offset > m_size - 4 || (offset & 0x3)) {
m_isValid = false;
return 0;
}
return m_data[offset+3] | m_data[offset+2] << 8
| m_data[offset+1] << 16 | m_data[offset] << 24;
}
};
QIconCacheGtkReader::QIconCacheGtkReader(const QString &dirName)
: m_isValid(false)
{
QFileInfo info(dirName + QLatin1String("/icon-theme.cache"));
if (!info.exists() || info.lastModified() < QFileInfo(dirName).lastModified())
return;
m_file.setFileName(info.absoluteFilePath());
if (!m_file.open(QFile::ReadOnly))
return;
m_size = m_file.size();
m_data = m_file.map(0, m_size);
if (!m_data)
return;
if (read16(0) != 1) // VERSION_MAJOR
return;
m_isValid = true;
// Check that all the directories are older than the cache
auto lastModified = info.lastModified();
quint32 dirListOffset = read32(8);
quint32 dirListLen = read32(dirListOffset);
for (uint i = 0; i < dirListLen; ++i) {
quint32 offset = read32(dirListOffset + 4 + 4 * i);
if (!m_isValid || offset >= m_size || lastModified < QFileInfo(dirName + QLatin1Char('/')
+ QString::fromUtf8(reinterpret_cast<const char*>(m_data + offset))).lastModified()) {
m_isValid = false;
return;
}
}
}
static quint32 icon_name_hash(const char *p)
{
quint32 h = static_cast<signed char>(*p);
for (p += 1; *p != '\0'; p++)
h = (h << 5) - h + *p;
return h;
}
/*! \internal
lookup the icon name and return the list of subdirectories in which an icon
with this name is present. The char* are pointers to the mapped data.
For example, this would return { "32x32/apps", "24x24/apps" , ... }
*/
QVector<const char *> QIconCacheGtkReader::lookup(const QStringRef &name)
{
QVector<const char *> ret;
if (!isValid())
return ret;
QByteArray nameUtf8 = name.toUtf8();
quint32 hash = icon_name_hash(nameUtf8.data());
quint32 hashOffset = read32(4);
quint32 hashBucketCount = read32(hashOffset);
if (!isValid() || hashBucketCount == 0) {
m_isValid = false;
return ret;
}
quint32 bucketIndex = hash % hashBucketCount;
quint32 bucketOffset = read32(hashOffset + 4 + bucketIndex * 4);
while (bucketOffset > 0 && bucketOffset <= m_size - 12) {
quint32 nameOff = read32(bucketOffset + 4);
if (nameOff < m_size && strcmp(reinterpret_cast<const char*>(m_data + nameOff), nameUtf8.constData()) == 0) {
quint32 dirListOffset = read32(8);
quint32 dirListLen = read32(dirListOffset);
quint32 listOffset = read32(bucketOffset+8);
quint32 listLen = read32(listOffset);
if (!m_isValid || listOffset + 4 + 8 * listLen > m_size) {
m_isValid = false;
return ret;
}
ret.reserve(listLen);
for (uint j = 0; j < listLen && m_isValid; ++j) {
quint32 dirIndex = read16(listOffset + 4 + 8 * j);
quint32 o = read32(dirListOffset + 4 + dirIndex*4);
if (!m_isValid || dirIndex >= dirListLen || o >= m_size) {
m_isValid = false;
return ret;
}
ret.append(reinterpret_cast<const char*>(m_data) + o);
}
return ret;
}
bucketOffset = read32(bucketOffset);
}
return ret;
}
XdgIconTheme::XdgIconTheme(const QString &themeName)
: m_valid(false)
, m_followsColorScheme(false)
{
QFile themeIndex;
const QStringList iconDirs = QIcon::themeSearchPaths();
for ( int i = 0 ; i < iconDirs.size() ; ++i) {
QDir iconDir(iconDirs[i]);
QString themeDir = iconDir.path() + QLatin1Char('/') + themeName;
QFileInfo themeDirInfo(themeDir);
if (themeDirInfo.isDir()) {
m_contentDirs << themeDir;
m_gtkCaches << QSharedPointer<QIconCacheGtkReader>::create(themeDir);
}
if (!m_valid) {
themeIndex.setFileName(themeDir + QLatin1String("/index.theme"));
if (themeIndex.exists())
m_valid = true;
}
}
#ifndef QT_NO_SETTINGS
if (themeIndex.exists()) {
const QSettings indexReader(themeIndex.fileName(), QSettings::IniFormat);
m_followsColorScheme = indexReader.value(QStringLiteral("Icon Theme/FollowsColorScheme"), false).toBool();
const QStringList keys = indexReader.allKeys();
for (auto const &key : keys) {
if (key.endsWith(QLatin1String("/Size"))) {
// Note the QSettings ini-format does not accept
// slashes in key names, hence we have to cheat
if (int size = indexReader.value(key).toInt()) {
QString directoryKey = key.left(key.size() - 5);
QIconDirInfo dirInfo(directoryKey);
dirInfo.size = size;
QString type = indexReader.value(directoryKey +
QLatin1String("/Type")
).toString();
if (type == QLatin1String("Fixed"))
dirInfo.type = QIconDirInfo::Fixed;
else if (type == QLatin1String("Scalable"))
dirInfo.type = QIconDirInfo::Scalable;
else
dirInfo.type = QIconDirInfo::Threshold;
dirInfo.threshold = indexReader.value(directoryKey +
QLatin1String("/Threshold"),
2).toInt();
dirInfo.minSize = indexReader.value(directoryKey +
QLatin1String("/MinSize"),
size).toInt();
dirInfo.maxSize = indexReader.value(directoryKey +
QLatin1String("/MaxSize"),
size).toInt();
#if QT_VERSION >= QT_VERSION_CHECK(5, 9, 0)
dirInfo.scale = indexReader.value(directoryKey +
QLatin1String("/Scale"),
1).toInt();
#endif
m_keyList.append(dirInfo);
}
}
}
// Parent themes provide fallbacks for missing icons
m_parents = indexReader.value(
QLatin1String("Icon Theme/Inherits")).toStringList();
m_parents.removeAll(QString());
m_parents.removeAll(QLatin1String("hicolor"));
// Ensure a default platform fallback for all themes
if (m_parents.isEmpty()) {
const QString fallback = fallbackTheme();
if (!fallback.isEmpty())
m_parents.append(fallback);
}
}
#endif //QT_NO_SETTINGS
}
/* WARNING:
*
* https://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html
*
* <cite>
* The dash “-” character is used to separate levels of specificity in icon
* names, for all contexts other than MimeTypes. For instance, we use
* “input-mouse” as the generic item for all mouse devices, and we use
* “input-mouse-usb” for a USB mouse device. However, if the more specific
* item does not exist in the current theme, and does exist in a parent
* theme, the generic icon from the current theme is preferred, in order
* to keep consistent style.
* </cite>
*
* But we believe, that using the more specific icon (even from parents)
* is better for user experience. So we are violating the standard
* intentionally.
*
* Ref.
* https://github.com/lxde/lxqt/issues/1252
* https://github.com/lxde/libqtxdg/pull/116
*/
QThemeIconInfo XdgIconLoader::findIconHelper(const QString &themeName,
const QString &iconName,
QStringList &visited,
bool dashFallback) const
{
QThemeIconInfo info;
Q_ASSERT(!themeName.isEmpty());
// Used to protect against potential recursions
visited << themeName;
XdgIconTheme &theme = themeList[themeName];
if (!theme.isValid()) {
theme = XdgIconTheme(themeName);
if (!theme.isValid()) {
const QString fallback = fallbackTheme();
if (!fallback.isEmpty())
theme = XdgIconTheme(fallback);
}
}
const QStringList contentDirs = theme.contentDirs();
const QString svgext(QLatin1String(".svg"));
const QString pngext(QLatin1String(".png"));
const QString xpmext(QLatin1String(".xpm"));
QStringRef iconNameFallback(&iconName);
// Iterate through all icon's fallbacks in current theme
while (info.entries.isEmpty()) {
const QString svgIconName = iconNameFallback + svgext;
const QString pngIconName = iconNameFallback + pngext;
const QString xpmIconName = iconNameFallback + xpmext;
// Add all relevant files
for (int i = 0; i < contentDirs.size(); ++i) {
QVector<QIconDirInfo> subDirs = theme.keyList();
// Try to reduce the amount of subDirs by looking in the GTK+ cache in order to save
// a massive amount of file stat (especially if the icon is not there)
auto cache = theme.m_gtkCaches.at(i);
if (cache->isValid()) {
const auto result = cache->lookup(iconNameFallback);
if (cache->isValid()) {
const QVector<QIconDirInfo> subDirsCopy = subDirs;
subDirs.clear();
subDirs.reserve(result.count());
for (const char *s : result) {
QString path = QString::fromUtf8(s);
auto it = std::find_if(subDirsCopy.cbegin(), subDirsCopy.cend(),
[&](const QIconDirInfo &info) {
return info.path == path; } );
if (it != subDirsCopy.cend()) {
subDirs.append(*it);
}
}
}
}
QString contentDir = contentDirs.at(i) + QLatin1Char('/');
for (int j = 0; j < subDirs.size() ; ++j) {
const QIconDirInfo &dirInfo = subDirs.at(j);
const QString subDir = contentDir + dirInfo.path + QLatin1Char('/');
const QString pngPath = subDir + pngIconName;
if (QFile::exists(pngPath)) {
PixmapEntry *iconEntry = new PixmapEntry;
iconEntry->dir = dirInfo;
iconEntry->filename = pngPath;
// Notice we ensure that pixmap entries always come before
// scalable to preserve search order afterwards
info.entries.prepend(iconEntry);
} else {
const QString svgPath = subDir + svgIconName;
if (gSupportsSvg && QFile::exists(svgPath)) {
ScalableEntry *iconEntry = (followColorScheme() && theme.followsColorScheme()) ? new ScalableFollowsColorEntry : new ScalableEntry;
iconEntry->dir = dirInfo;
iconEntry->filename = svgPath;
info.entries.append(iconEntry);
}
}
const QString xpmPath = subDir + xpmIconName;
if (QFile::exists(xpmPath)) {
PixmapEntry *iconEntry = new PixmapEntry;
iconEntry->dir = dirInfo;
iconEntry->filename = xpmPath;
// Notice we ensure that pixmap entries always come before
// scalable to preserve search order afterwards
info.entries.append(iconEntry);
}
}
}
if (!info.entries.isEmpty())
info.iconName = iconNameFallback.toString();
break;
}
if (info.entries.isEmpty()) {
const QStringList parents = theme.parents();
// Search recursively through inherited themes
for (int i = 0 ; i < parents.size() ; ++i) {
const QString parentTheme = parents.at(i).trimmed();
if (!visited.contains(parentTheme)) // guard against recursion
info = findIconHelper(parentTheme, iconName, visited);
if (!info.entries.isEmpty()) // success
break;
}
}
if (dashFallback && info.entries.isEmpty()) {
// If it's possible - find next fallback for the icon
const int indexOfDash = iconNameFallback.lastIndexOf(QLatin1Char('-'));
if (indexOfDash != -1) {
iconNameFallback.truncate(indexOfDash);
QStringList _visited;
info = findIconHelper(themeName, iconNameFallback.toString(), _visited, true);
}
}
return info;
}
QThemeIconInfo XdgIconLoader::unthemedFallback(const QString &iconName, const QStringList &searchPaths) const
{
QThemeIconInfo info;
const QString svgext(QLatin1String(".svg"));
const QString pngext(QLatin1String(".png"));
const QString xpmext(QLatin1String(".xpm"));
for (const auto &contentDir : searchPaths) {
QDir currentDir(contentDir);
if (currentDir.exists(iconName + pngext)) {
PixmapEntry *iconEntry = new PixmapEntry;
iconEntry->filename = currentDir.filePath(iconName + pngext);
// Notice we ensure that pixmap entries always come before
// scalable to preserve search order afterwards
info.entries.prepend(iconEntry);
} else if (gSupportsSvg &&
currentDir.exists(iconName + svgext)) {
ScalableEntry *iconEntry = new ScalableEntry;
iconEntry->filename = currentDir.filePath(iconName + svgext);
info.entries.append(iconEntry);
} else if (currentDir.exists(iconName + xpmext)) {
PixmapEntry *iconEntry = new PixmapEntry;
iconEntry->filename = currentDir.filePath(iconName + xpmext);
// Notice we ensure that pixmap entries always come before
// scalable to preserve search order afterwards
info.entries.append(iconEntry);
}
}
return info;
}
QThemeIconInfo XdgIconLoader::loadIcon(const QString &name) const
{
const QString theme_name = QIconLoader::instance()->themeName();
if (!theme_name.isEmpty()) {
QStringList visited;
auto info = findIconHelper(theme_name, name, visited, true);
if (info.entries.isEmpty()) {
const auto hicolorInfo = findIconHelper(QLatin1String("hicolor"), name, visited, true);
if (hicolorInfo.entries.isEmpty()) {
const auto unthemedInfo = unthemedFallback(name, QIcon::themeSearchPaths());
if (unthemedInfo.entries.isEmpty()) {
/* Freedesktop standard says to look in /usr/share/pixmaps last */
const QStringList pixmapPath = (QStringList() << QString::fromLatin1("/usr/share/pixmaps"));
const auto pixmapInfo = unthemedFallback(name, pixmapPath);
if (pixmapInfo.entries.isEmpty()) {
return QThemeIconInfo();
} else {
return pixmapInfo;
}
} else {
return unthemedInfo;
}
} else {
return hicolorInfo;
}
} else {
return info;
}
}
return QThemeIconInfo();
}
// -------- Icon Loader Engine -------- //
XdgIconLoaderEngine::XdgIconLoaderEngine(const QString& iconName)
: m_iconName(iconName), m_key(0)
{
}
XdgIconLoaderEngine::~XdgIconLoaderEngine()
{
qDeleteAll(m_info.entries);
}
XdgIconLoaderEngine::XdgIconLoaderEngine(const XdgIconLoaderEngine &other)
: QIconEngine(other),
m_iconName(other.m_iconName),
m_key(0)
{
}
QIconEngine *XdgIconLoaderEngine::clone() const
{
return new XdgIconLoaderEngine(*this);
}
bool XdgIconLoaderEngine::read(QDataStream &in) {
in >> m_iconName;
return true;
}
bool XdgIconLoaderEngine::write(QDataStream &out) const
{
out << m_iconName;
return true;
}
bool XdgIconLoaderEngine::hasIcon() const
{
return !(m_info.entries.isEmpty());
}
// Lazily load the icon
void XdgIconLoaderEngine::ensureLoaded()
{
if (!(QIconLoader::instance()->themeKey() == m_key)) {
qDeleteAll(m_info.entries);
m_info.entries.clear();
m_info.iconName.clear();
Q_ASSERT(m_info.entries.size() == 0);
m_info = XdgIconLoader::instance()->loadIcon(m_iconName);
m_key = QIconLoader::instance()->themeKey();
}
}
void XdgIconLoaderEngine::paint(QPainter *painter, const QRect &rect,
QIcon::Mode mode, QIcon::State state)
{
QSize pixmapSize = rect.size();
#if defined(Q_DEAD_CODE_FROM_QT4_MAC)
pixmapSize *= qt_mac_get_scalefactor();
#endif
painter->drawPixmap(rect, pixmap(pixmapSize, mode, state));
}
/*
* This algorithm is defined by the freedesktop spec:
* http://standards.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html
*/
static bool directoryMatchesSize(const QIconDirInfo &dir, int iconsize, int iconscale)
{
#if QT_VERSION >= QT_VERSION_CHECK(5, 9, 0)
if (dir.scale != iconscale)
return false;
#endif
if (dir.type == QIconDirInfo::Fixed) {
return dir.size == iconsize;
} else if (dir.type == QIconDirInfo::Scalable) {
return iconsize <= dir.maxSize &&
iconsize >= dir.minSize;
} else if (dir.type == QIconDirInfo::Threshold) {
return iconsize >= dir.size - dir.threshold &&
iconsize <= dir.size + dir.threshold;
}
Q_ASSERT(1); // Not a valid value
return false;
}
/*
* This algorithm is defined by the freedesktop spec:
* http://standards.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html
*/
static int directorySizeDistance(const QIconDirInfo &dir, int iconsize, int iconscale)
{
#if QT_VERSION >= QT_VERSION_CHECK(5, 9, 0)
const int scaledIconSize = iconsize * iconscale;
if (dir.type == QIconDirInfo::Fixed) {
return qAbs(dir.size * dir.scale - scaledIconSize);
} else if (dir.type == QIconDirInfo::Scalable) {
if (scaledIconSize < dir.minSize * dir.scale)
return dir.minSize * dir.scale - scaledIconSize;
else if (scaledIconSize > dir.maxSize * dir.scale)
return scaledIconSize - dir.maxSize * dir.scale;
else
return 0;
} else if (dir.type == QIconDirInfo::Threshold) {
if (scaledIconSize < (dir.size - dir.threshold) * dir.scale)
return dir.minSize * dir.scale - scaledIconSize;
else if (scaledIconSize > (dir.size + dir.threshold) * dir.scale)
return scaledIconSize - dir.maxSize * dir.scale;
else return 0;
}
#else
if (dir.type == QIconDirInfo::Fixed) {
return qAbs(dir.size - iconsize);
} else if (dir.type == QIconDirInfo::Scalable) {
if (iconsize < dir.minSize)
return dir.minSize - iconsize;
else if (iconsize > dir.maxSize)
return iconsize - dir.maxSize;
else
return 0;
} else if (dir.type == QIconDirInfo::Threshold) {
if (iconsize < dir.size - dir.threshold)
return dir.minSize - iconsize;
else if (iconsize > dir.size + dir.threshold)
return iconsize - dir.maxSize;
else return 0;
}
#endif
Q_ASSERT(1); // Not a valid value
return INT_MAX;
}
QIconLoaderEngineEntry *XdgIconLoaderEngine::entryForSize(const QSize &size, int scale)
{
int iconsize = qMin(size.width(), size.height());
// Note that m_info.entries are sorted so that png-files
// come first
const int numEntries = m_info.entries.size();
// Search for exact matches first
for (int i = 0; i < numEntries; ++i) {
QIconLoaderEngineEntry *entry = m_info.entries.at(i);
if (directoryMatchesSize(entry->dir, iconsize, scale)) {
return entry;
}
}
// Find the minimum distance icon
int minimalSize = INT_MAX;
QIconLoaderEngineEntry *closestMatch = 0;
for (int i = 0; i < numEntries; ++i) {
QIconLoaderEngineEntry *entry = m_info.entries.at(i);
int distance = directorySizeDistance(entry->dir, iconsize, scale);
if (distance < minimalSize) {
minimalSize = distance;
closestMatch = entry;
}
}
return closestMatch;
}
/*
* Returns the actual icon size. For scalable svg's this is equivalent
* to the requested size. Otherwise the closest match is returned but
* we can never return a bigger size than the requested size.
*
*/
QSize XdgIconLoaderEngine::actualSize(const QSize &size, QIcon::Mode mode,
QIcon::State state)
{
ensureLoaded();
QIconLoaderEngineEntry *entry = entryForSize(size);
if (entry) {
const QIconDirInfo &dir = entry->dir;
if (dir.type == QIconDirInfo::Scalable || dynamic_cast<ScalableEntry *>(entry))
return size;
else {
int dir_size = dir.size;
//Note: fallback for directories that don't have its content size defined
// -> get the actual size based on the image if possible
PixmapEntry * pix_e;
if (0 == dir_size && nullptr != (pix_e = dynamic_cast<PixmapEntry *>(entry)))
{
QSize pix_size = pix_e->basePixmap.size();
dir_size = qMin(pix_size.width(), pix_size.height());
}
int result = qMin(dir_size, qMin(size.width(), size.height()));
return QSize(result, result);
}
}
return {0, 0};
}
// XXX: duplicated from qiconloader.cpp, because this symbol isn't exported :(
QPixmap PixmapEntry::pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state)
{
Q_UNUSED(state);
// Ensure that basePixmap is lazily initialized before generating the
// key, otherwise the cache key is not unique
if (basePixmap.isNull())
basePixmap.load(filename);
QSize actualSize = basePixmap.size();
// If the size of the best match we have (basePixmap) is larger than the
// requested size, we downscale it to match.
if (!actualSize.isNull() && (actualSize.width() > size.width() || actualSize.height() > size.height()))
actualSize.scale(size, Qt::KeepAspectRatio);
QString key = QLatin1String("$qt_theme_")
% HexString<qint64>(basePixmap.cacheKey())
% HexString<int>(mode)
% HexString<qint64>(QGuiApplication::palette().cacheKey())
% HexString<int>(actualSize.width())
% HexString<int>(actualSize.height());
QPixmap cachedPixmap;
if (QPixmapCache::find(key, &cachedPixmap)) {
return cachedPixmap;
} else {
if (basePixmap.size() != actualSize)
cachedPixmap = basePixmap.scaled(actualSize, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
else
cachedPixmap = basePixmap;
if (QGuiApplication *guiApp = qobject_cast<QGuiApplication *>(qApp))
cachedPixmap = static_cast<QGuiApplicationPrivate*>(QObjectPrivate::get(guiApp))->applyQIconStyleHelper(mode, cachedPixmap);
QPixmapCache::insert(key, cachedPixmap);
}
return cachedPixmap;
}
// XXX: duplicated from qiconloader.cpp, because this symbol isn't exported :(
QPixmap ScalableEntry::pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state)
{
if (svgIcon.isNull())
svgIcon = QIcon(filename);
// Simply reuse svg icon engine
return svgIcon.pixmap(size, mode, state);
}
// XXX: duplicated from qicon.cpp, because the symbol qt_iconEngineFactoryLoader isn't exported :(
Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, qt_iconEngineFactoryLoader,
(QIconEngineFactoryInterface_iid, QLatin1String("/iconengines"), Qt::CaseInsensitive))
//extern QFactoryLoader *qt_iconEngineFactoryLoader(); // qicon.cpp
QPixmap ScalableFollowsColorEntry::pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state)
{
QIcon & icon = QIcon::Selected == mode ? svgSelectedIcon : svgIcon;
if (icon.isNull())
{
// The following lines are adapted and updated from KDE's "kiconloader.cpp" ->
// KIconLoaderPrivate::processSvg() and KIconLoaderPrivate::createIconImage().
// They read the SVG color scheme of SVG icons and give images based on the icon mode.
QByteArray processedContents;
QFile device{filename};;
if (device.open(QIODevice::ReadOnly))
{
const QPalette pal = qApp->palette();
QString styleSheet = QStringLiteral(".ColorScheme-Text{color:%1;}")
.arg(mode == QIcon::Selected
? pal.highlightedText().color().name()
: pal.windowText().color().name());
QXmlStreamReader xmlReader(&device);
QXmlStreamWriter writer(&processedContents);
while (!xmlReader.atEnd())
{
if (xmlReader.readNext() == QXmlStreamReader::StartElement
&& xmlReader.qualifiedName() == QLatin1String("style")
&& xmlReader.attributes().value(QLatin1String("id")) == QLatin1String("current-color-scheme"))
{
writer.writeStartElement(QLatin1String("style"));
writer.writeAttributes(xmlReader.attributes());
writer.writeCharacters(styleSheet);
writer.writeEndElement();
while (xmlReader.tokenType() != QXmlStreamReader::EndElement)
xmlReader.readNext();
}
else if (xmlReader.tokenType() != QXmlStreamReader::Invalid)
writer.writeCurrentToken(xmlReader);
}
}
// use the QSvgIconEngine
// - assemble the content as it is done by the QSvgIconEngine::write() (operator <<)
// - create the QIcon with QSvgIconEngine initialized from the content
const int index = qt_iconEngineFactoryLoader()->indexOf(QStringLiteral("svg"));
if (index != -1)
{
if (QIconEnginePlugin * factory = qobject_cast<QIconEnginePlugin*>(qt_iconEngineFactoryLoader()->instance(index)))
{
if (QIconEngine * engine = factory->create())
{
QByteArray engine_arr;
QDataStream str{&engine_arr, QIODevice::WriteOnly};
str.setVersion(QDataStream::Qt_4_4);
QHash<int, QString> filenames;
filenames[0] = filename;
QHash<int, QByteArray> svg_buffers;
svg_buffers[0] = processedContents;
str << filenames << static_cast<int>(0)/*isCompressed*/ << svg_buffers << static_cast<int>(0)/*hasAddedPimaps*/;
QDataStream str_read{&engine_arr, QIODevice::ReadOnly};
str_read.setVersion(QDataStream::Qt_4_4);
engine->read(str_read);
icon = QIcon{engine};
}
}
}
// load the icon directly from file, if still null
if (icon.isNull())
icon = QIcon(filename);
}
return icon.pixmap(size, mode, state);
}
QPixmap XdgIconLoaderEngine::pixmap(const QSize &size, QIcon::Mode mode,
QIcon::State state)
{
ensureLoaded();
QIconLoaderEngineEntry *entry = entryForSize(size);
if (entry)
return entry->pixmap(size, mode, state);
return QPixmap();
}
QString XdgIconLoaderEngine::key() const
{
return QLatin1String("XdgIconLoaderEngine");
}
void XdgIconLoaderEngine::virtual_hook(int id, void *data)
{
ensureLoaded();
switch (id) {
case QIconEngine::AvailableSizesHook:
{
QIconEngine::AvailableSizesArgument &arg
= *reinterpret_cast<QIconEngine::AvailableSizesArgument*>(data);
const int N = m_info.entries.size();
QList<QSize> sizes;
sizes.reserve(N);
// Gets all sizes from the DirectoryInfo entries
for (int i = 0; i < N; ++i) {
int size = m_info.entries.at(i)->dir.size;
sizes.append(QSize(size, size));
}
arg.sizes.swap(sizes); // commit
}
break;
case QIconEngine::IconNameHook:
{
QString &name = *reinterpret_cast<QString*>(data);
name = m_info.iconName;
}
break;
#if QT_VERSION >= QT_VERSION_CHECK(5, 7, 0)
case QIconEngine::IsNullHook:
{
*reinterpret_cast<bool*>(data) = m_info.entries.isEmpty();
}
break;
#endif
#if QT_VERSION >= QT_VERSION_CHECK(5, 9, 0)
case QIconEngine::ScaledPixmapHook:
{
QIconEngine::ScaledPixmapArgument &arg = *reinterpret_cast<QIconEngine::ScaledPixmapArgument*>(data);
// QIcon::pixmap() multiplies size by the device pixel ratio.
const int integerScale = qCeil(arg.scale);
QIconLoaderEngineEntry *entry = entryForSize(arg.size / integerScale, integerScale);
arg.pixmap = entry ? entry->pixmap(arg.size, arg.mode, arg.state) : QPixmap();
}
break;
#endif
default:
QIconEngine::virtual_hook(id, data);
}
}
//QT_END_NAMESPACE
#endif //QT_NO_ICON