pollymc/depends/iconfix/internal/qiconloader_p.h

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#pragma once

#include <QtCore/qglobal.h>

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtGui/QIcon>
#include <QtGui/QIconEngine>
#include <QtGui/QPixmapCache>
#include <QtCore/QHash>
#include <QtCore/QVector>
#include <QtCore/QTypeInfo>


namespace QtXdg
{

class QIconLoader;

struct QIconDirInfo
{
	enum Type
	{
		Fixed,
		Scalable,
		Threshold
	};
	QIconDirInfo(const QString &_path = QString())
		: path(_path), size(0), maxSize(0), minSize(0), threshold(0), type(Threshold)
	{
	}
	QString path;
	short size;
	short maxSize;
	short minSize;
	short threshold;
	Type type : 4;
};

class QIconLoaderEngineEntry
{
public:
	virtual ~QIconLoaderEngineEntry()
	{
	}
	virtual QPixmap pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state) = 0;
	QString filename;
	QIconDirInfo dir;
	static int count;
};

struct ScalableEntry : public QIconLoaderEngineEntry
{
	QPixmap pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state) Q_DECL_OVERRIDE;
	QIcon svgIcon;
};

struct PixmapEntry : public QIconLoaderEngineEntry
{
	QPixmap pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state) Q_DECL_OVERRIDE;
	QPixmap basePixmap;
};

typedef QList<QIconLoaderEngineEntry *> QThemeIconEntries;

// class QIconLoaderEngine : public QIconEngine
class QIconLoaderEngineFixed : public QIconEngine
{
public:
	QIconLoaderEngineFixed(const QString &iconName = QString());
	~QIconLoaderEngineFixed();

	void paint(QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State state);
	QPixmap pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state);
	QSize actualSize(const QSize &size, QIcon::Mode mode, QIcon::State state);
	QIconEngine *clone() const;
	bool read(QDataStream &in);
	bool write(QDataStream &out) const;

private:
	QString key() const;
	bool hasIcon() const;
	void ensureLoaded();
	void virtual_hook(int id, void *data);
	QIconLoaderEngineEntry *entryForSize(const QSize &size);
	QIconLoaderEngineFixed(const QIconLoaderEngineFixed &other);
	QThemeIconEntries m_entries;
	QString m_iconName;
	uint m_key;

	friend class QIconLoader;
};

class QIconTheme
{
public:
	QIconTheme(const QString &name);
	QIconTheme() : m_valid(false)
	{
	}
	QStringList parents()
	{
		return m_parents;
	}
	QVector<QIconDirInfo> keyList()
	{
		return m_keyList;
	}
	QString contentDir()
	{
		return m_contentDir;
	}
	QStringList contentDirs()
	{
		return m_contentDirs;
	}
	bool isValid()
	{
		return m_valid;
	}

private:
	QString m_contentDir;
	QStringList m_contentDirs;
	QVector<QIconDirInfo> m_keyList;
	QStringList m_parents;
	bool m_valid;
};

class QIconLoader
{
public:
	QIconLoader();
	QThemeIconEntries loadIcon(const QString &iconName) const;
	uint themeKey() const
	{
		return m_themeKey;
	}

	QString themeName() const
	{
		return m_userTheme.isEmpty() ? m_systemTheme : m_userTheme;
	}
	void setThemeName(const QString &themeName);
	QIconTheme theme()
	{
		return themeList.value(themeName());
	}
	void setThemeSearchPath(const QStringList &searchPaths);
	QStringList themeSearchPaths() const;
	QIconDirInfo dirInfo(int dirindex);
	static QIconLoader *instance();
	void updateSystemTheme();
	void invalidateKey()
	{
		m_themeKey++;
	}
	void ensureInitialized();

private:
	QThemeIconEntries findIconHelper(const QString &themeName, const QString &iconName,
									 QStringList &visited) const;
	uint m_themeKey;
	bool m_supportsSvg;
	bool m_initialized;

	mutable QString m_userTheme;
	mutable QString m_systemTheme;
	mutable QStringList m_iconDirs;
	mutable QHash<QString, QIconTheme> themeList;
};

} // QtXdg

// Note: class template specialization of 'QTypeInfo' must occur at
//       global scope
Q_DECLARE_TYPEINFO(QtXdg::QIconDirInfo, Q_MOVABLE_TYPE);