diff options
Diffstat (limited to 'meshmc/libraries/iconfix/internal/qiconloader.cpp')
| -rw-r--r-- | meshmc/libraries/iconfix/internal/qiconloader.cpp | 646 |
1 files changed, 646 insertions, 0 deletions
diff --git a/meshmc/libraries/iconfix/internal/qiconloader.cpp b/meshmc/libraries/iconfix/internal/qiconloader.cpp new file mode 100644 index 0000000000..38ca549ade --- /dev/null +++ b/meshmc/libraries/iconfix/internal/qiconloader.cpp @@ -0,0 +1,646 @@ +/**************************************************************************** +** SPDX-License-Identifier: LGPL-2.1-or-later +** 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. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#include "qiconloader_p.h" + +#include <QtGui/QIconEnginePlugin> +#include <QtGui/QPixmapCache> +#include <QtGui/QIconEngine> +#include <QtGui/QPalette> +#include <QtCore/QList> +#include <QtCore/QHash> +#include <QtCore/QDir> +#include <QtCore/QSettings> +#include <QtGui/QPainter> +#include <QApplication> +#include <QString> + +#include "qhexstring_p.h" + +namespace QtXdg +{ + + Q_GLOBAL_STATIC(QIconLoader, iconLoaderInstance) + + /* Theme to use in last resort, if the theme does not have the icon, neither + * the parents */ + + static QString fallbackTheme() + { + return QString("hicolor"); + } + + QIconLoader::QIconLoader() + : m_themeKey(1), m_supportsSvg(false), m_initialized(false) + { + } + + // We lazily initialize the loader to make static icons + // work. Though we do not officially support this. + + static inline QString systemThemeName() + { + return QIcon::themeName(); + } + + static inline QStringList systemIconSearchPaths() + { + auto paths = QIcon::themeSearchPaths(); + paths.push_front(":/icons"); + return paths; + } + + void QIconLoader::ensureInitialized() + { + if (!m_initialized) { + m_initialized = true; + + Q_ASSERT(qApp); + + m_systemTheme = QIcon::themeName(); + + if (m_systemTheme.isEmpty()) + m_systemTheme = fallbackTheme(); + m_supportsSvg = true; + } + } + + QIconLoader* QIconLoader::instance() + { + iconLoaderInstance()->ensureInitialized(); + return iconLoaderInstance(); + } + + // Queries the system theme and invalidates existing + // icons if the theme has changed. + void QIconLoader::updateSystemTheme() + { + // Only change if this is not explicitly set by the user + if (m_userTheme.isEmpty()) { + QString theme = systemThemeName(); + if (theme.isEmpty()) + theme = fallbackTheme(); + if (theme != m_systemTheme) { + m_systemTheme = theme; + invalidateKey(); + } + } + } + + void QIconLoader::setThemeName(const QString& themeName) + { + m_userTheme = themeName; + invalidateKey(); + } + + void QIconLoader::setThemeSearchPath(const QStringList& searchPaths) + { + m_iconDirs = searchPaths; + themeList.clear(); + invalidateKey(); + } + + QStringList QIconLoader::themeSearchPaths() const + { + if (m_iconDirs.isEmpty()) { + m_iconDirs = systemIconSearchPaths(); + } + return m_iconDirs; + } + + QIconTheme::QIconTheme(const QString& themeName) : m_valid(false) + { + QFile themeIndex; + + QStringList iconDirs = systemIconSearchPaths(); + for (int i = 0; i < iconDirs.size(); ++i) { + QDir iconDir(iconDirs[i]); + QString themeDir = iconDir.path() + QLatin1Char('/') + themeName; + themeIndex.setFileName(themeDir + QLatin1String("/index.theme")); + if (themeIndex.exists()) { + m_contentDir = themeDir; + m_valid = true; + + foreach (QString path, iconDirs) { + if (QFileInfo(path).isDir()) + m_contentDirs.append(path + QLatin1Char('/') + + themeName); + } + + break; + } + } + + // if there is no index file, abscond. + if (!themeIndex.exists()) + return; + + // otherwise continue reading index file + const QSettings indexReader(themeIndex.fileName(), + QSettings::IniFormat); + QStringListIterator keyIterator(indexReader.allKeys()); + while (keyIterator.hasNext()) { + const QString key = keyIterator.next(); + if (!key.endsWith(QLatin1String("/Size"))) + continue; + + // Note the QSettings ini-format does not accept + // slashes in key names, hence we have to cheat + int size = indexReader.value(key).toInt(); + if (!size) + continue; + + 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(); + m_keyList.append(dirInfo); + } + + // Parent themes provide fallbacks for missing icons + m_parents = indexReader.value(QLatin1String("Icon Theme/Inherits")) + .toStringList(); + m_parents.removeAll(QString()); + + // Ensure a default platform fallback for all themes + if (m_parents.isEmpty()) { + const QString fallback = fallbackTheme(); + if (!fallback.isEmpty()) + m_parents.append(fallback); + } + + // Ensure that all themes fall back to hicolor + if (!m_parents.contains(QLatin1String("hicolor"))) + m_parents.append(QLatin1String("hicolor")); + } + + QThemeIconEntries QIconLoader::findIconHelper(const QString& themeName, + const QString& iconName, + QStringList& visited) const + { + QThemeIconEntries entries; + Q_ASSERT(!themeName.isEmpty()); + + QPixmap pixmap; + + // Used to protect against potential recursions + visited << themeName; + + QIconTheme theme = themeList.value(themeName); + if (!theme.isValid()) { + theme = QIconTheme(themeName); + if (!theme.isValid()) + theme = QIconTheme(fallbackTheme()); + + themeList.insert(themeName, theme); + } + + QStringList contentDirs = theme.contentDirs(); + const QVector<QIconDirInfo> subDirs = theme.keyList(); + + const QString svgext(QLatin1String(".svg")); + const QString pngext(QLatin1String(".png")); + const QString xpmext(QLatin1String(".xpm")); + + // Add all relevant files + for (int i = 0; i < subDirs.size(); ++i) { + const QIconDirInfo& dirInfo = subDirs.at(i); + QString subdir = dirInfo.path; + + foreach (QString contentDir, contentDirs) { + QDir currentDir(contentDir + '/' + subdir); + + if (currentDir.exists(iconName + pngext)) { + PixmapEntry* iconEntry = new PixmapEntry; + iconEntry->dir = dirInfo; + iconEntry->filename = + currentDir.filePath(iconName + pngext); + // Notice we ensure that pixmap entries always come before + // scalable to preserve search order afterwards + entries.prepend(iconEntry); + } else if (m_supportsSvg && + currentDir.exists(iconName + svgext)) { + ScalableEntry* iconEntry = new ScalableEntry; + iconEntry->dir = dirInfo; + iconEntry->filename = + currentDir.filePath(iconName + svgext); + entries.append(iconEntry); + break; + } else if (currentDir.exists(iconName + xpmext)) { + PixmapEntry* iconEntry = new PixmapEntry; + iconEntry->dir = dirInfo; + iconEntry->filename = + currentDir.filePath(iconName + xpmext); + // Notice we ensure that pixmap entries always come before + // scalable to preserve search order afterwards + entries.append(iconEntry); + break; + } + } + } + + if (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 + entries = findIconHelper(parentTheme, iconName, visited); + + if (!entries.isEmpty()) // success + break; + } + } + +/********************************************************************* +Author: Kaitlin Rupert <kaitlin.rupert@intel.com> +Date: Aug 12, 2010 +Description: Make it so that the QIcon loader honors /usr/share/pixmaps + directory. This is a valid directory per the Freedesktop.org + icon theme specification. +Bug: https://bugreports.qt.nokia.com/browse/QTBUG-12874 + *********************************************************************/ +#if defined(Q_OS_LINUX) || defined(Q_OS_FREEBSD) + /* Freedesktop standard says to look in /usr/share/pixmaps last */ + if (entries.isEmpty()) { + const QString pixmaps(QLatin1String("/usr/share/pixmaps")); + + QDir currentDir(pixmaps); + QIconDirInfo dirInfo(pixmaps); + if (currentDir.exists(iconName + pngext)) { + PixmapEntry* iconEntry = new PixmapEntry; + iconEntry->dir = dirInfo; + iconEntry->filename = currentDir.filePath(iconName + pngext); + // Notice we ensure that pixmap entries always come before + // scalable to preserve search order afterwards + entries.prepend(iconEntry); + } else if (m_supportsSvg && currentDir.exists(iconName + svgext)) { + ScalableEntry* iconEntry = new ScalableEntry; + iconEntry->dir = dirInfo; + iconEntry->filename = currentDir.filePath(iconName + svgext); + entries.append(iconEntry); + } else if (currentDir.exists(iconName + xpmext)) { + PixmapEntry* iconEntry = new PixmapEntry; + iconEntry->dir = dirInfo; + iconEntry->filename = currentDir.filePath(iconName + xpmext); + // Notice we ensure that pixmap entries always come before + // scalable to preserve search order afterwards + entries.append(iconEntry); + } + } +#endif + + if (entries.isEmpty()) { + // Search for unthemed icons in main dir of search paths + QStringList themeSearchPaths = QIcon::themeSearchPaths(); + foreach (QString contentDir, themeSearchPaths) { + 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 + entries.prepend(iconEntry); + } else if (m_supportsSvg && + currentDir.exists(iconName + svgext)) { + ScalableEntry* iconEntry = new ScalableEntry; + iconEntry->filename = + currentDir.filePath(iconName + svgext); + entries.append(iconEntry); + break; + } 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 + entries.append(iconEntry); + break; + } + } + } + return entries; + } + + QThemeIconEntries QIconLoader::loadIcon(const QString& name) const + { + if (!themeName().isEmpty()) { + QStringList visited; + return findIconHelper(themeName(), name, visited); + } + + return QThemeIconEntries(); + } + + // -------- Icon Loader Engine -------- // + + QIconLoaderEngineFixed::QIconLoaderEngineFixed(const QString& iconName) + : m_iconName(iconName), m_key(0) + { + } + + QIconLoaderEngineFixed::~QIconLoaderEngineFixed() + { + qDeleteAll(m_entries); + } + + QIconLoaderEngineFixed::QIconLoaderEngineFixed( + const QIconLoaderEngineFixed& other) + : QIconEngine(other), m_iconName(other.m_iconName), m_key(0) + { + } + + QIconEngine* QIconLoaderEngineFixed::clone() const + { + return new QIconLoaderEngineFixed(*this); + } + + bool QIconLoaderEngineFixed::read(QDataStream& in) + { + in >> m_iconName; + return true; + } + + bool QIconLoaderEngineFixed::write(QDataStream& out) const + { + out << m_iconName; + return true; + } + + bool QIconLoaderEngineFixed::hasIcon() const + { + return !(m_entries.isEmpty()); + } + + // Lazily load the icon + void QIconLoaderEngineFixed::ensureLoaded() + { + if (!(QIconLoader::instance()->themeKey() == m_key)) { + + qDeleteAll(m_entries); + + m_entries = QIconLoader::instance()->loadIcon(m_iconName); + m_key = QIconLoader::instance()->themeKey(); + } + } + + void QIconLoaderEngineFixed::paint(QPainter* painter, const QRect& rect, + QIcon::Mode mode, QIcon::State state) + { + QSize pixmapSize = rect.size(); +#if defined(Q_WS_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) + { + if (dir.type == QIconDirInfo::Fixed) { + return dir.size == iconsize; + } else if (dir.type == QIconDirInfo::Scalable) { + return dir.size <= 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) + { + 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; + } + + Q_ASSERT(1); // Not a valid value + return INT_MAX; + } + + QIconLoaderEngineEntry* + QIconLoaderEngineFixed::entryForSize(const QSize& size) + { + int iconsize = qMin(size.width(), size.height()); + + // Note that m_entries are sorted so that png-files + // come first + + const int numEntries = m_entries.size(); + + // Search for exact matches first + for (int i = 0; i < numEntries; ++i) { + QIconLoaderEngineEntry* entry = m_entries.at(i); + if (directoryMatchesSize(entry->dir, iconsize)) { + return entry; + } + } + + // Find the minimum distance icon + int minimalSize = INT_MAX; + QIconLoaderEngineEntry* closestMatch = 0; + for (int i = 0; i < numEntries; ++i) { + QIconLoaderEngineEntry* entry = m_entries.at(i); + int distance = directorySizeDistance(entry->dir, iconsize); + 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 QIconLoaderEngineFixed::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) + return size; + else { + int result = + qMin<int>(dir.size, qMin(size.width(), size.height())); + return QSize(result, result); + } + } + return QIconEngine::actualSize(size, mode, state); + } + + 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 (!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; + } + QPixmapCache::insert(key, cachedPixmap); + } + return cachedPixmap; + } + + 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); + } + + QPixmap QIconLoaderEngineFixed::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 QIconLoaderEngineFixed::key() const + { + return QLatin1String("QIconLoaderEngineFixed"); + } + + QList<QSize> QIconLoaderEngineFixed::availableSizes(QIcon::Mode mode, + QIcon::State state) + { + ensureLoaded(); + + const int N = m_entries.size(); + QList<QSize> sizes; + sizes.reserve(N); + + for (int i = 0; i < N; ++i) { + int size = m_entries.at(i)->dir.size; + sizes.append(QSize(size, size)); + } + return sizes; + } + + QString QIconLoaderEngineFixed::iconName() + { + return m_iconName; + } + +} // namespace QtXdg |