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// Theme.hh for FbTk - Fluxbox ToolKit
// Copyright (c) 2002 - 2006 Henrik Kinnunen (fluxgen at fluxbox dot org)
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
/**
@file Theme.hh holds ThemeItem<T>, Theme and ThemeManager which is the base for any theme
*/
#ifndef FBTK_THEME_HH
#define FBTK_THEME_HH
#include "Signal.hh"
#include "XrmDatabaseHelper.hh"
#include <string>
#include <list>
#include <vector>
namespace FbTk {
class Theme;
/// Base class for ThemeItem, holds name and altname
/**
@see ThemeItem
*/
class ThemeItem_base {
public:
ThemeItem_base(const std::string &name, const std::string &altname):
m_name(name), m_altname(altname) { }
virtual ~ThemeItem_base() { }
virtual void setFromString(const char *str) = 0;
virtual void setDefaultValue() = 0;
virtual void load(const std::string *name = 0, const std::string *altname = 0) = 0; // if it needs to load additional stuff
const std::string &name() const { return m_name; }
const std::string &altName() const { return m_altname; }
private:
std::string m_name, m_altname;
};
/// template ThemeItem class for basic theme items
/// to use this you need to specialize setDefaultValue, setFromString and load
template <typename T>
class ThemeItem:public ThemeItem_base {
public:
ThemeItem(FbTk::Theme &tm, const std::string &name, const std::string &altname);
virtual ~ThemeItem();
/// specialized
void setDefaultValue();
/// specialized
virtual void setFromString(const char *strval);
/// specialized
// name and altname may be different to the primary ones (e.g. from fallback)
// if they are null, then the original name is used
virtual void load(const std::string *name = 0, const std::string *altname = 0);
/**
@name access operators
*/
/**@{*/
T& operator*() { return m_value; }
const T& operator*() const { return m_value; }
T *operator->() { return &m_value; }
const T *operator->() const { return &m_value; }
/**@}*/
FbTk::Theme &theme() { return m_tm; }
private:
T m_value;
FbTk::Theme &m_tm;
};
/// Hold ThemeItems. Use this to create a Theme set
class Theme {
public:
typedef std::list<ThemeItem_base *> ItemList;
explicit Theme(int screen_num); // create a theme for a specific screen
virtual ~Theme();
virtual void reconfigTheme() = 0;
int screenNum() const { return m_screen_num; }
std::list<ThemeItem_base *> &itemList() { return m_themeitems; }
const std::list<ThemeItem_base *> &itemList() const { return m_themeitems; }
/// add ThemeItem
template <typename T>
void add(ThemeItem<T> &item);
/// remove ThemeItem
template <typename T>
void remove(ThemeItem<T> &item);
virtual bool fallback(ThemeItem_base &) { return false; }
Signal<> &reconfigSig() { return m_reconfig_sig; }
private:
const int m_screen_num;
ItemList m_themeitems;
Signal<> m_reconfig_sig;
};
/// Proxy interface for themes, so they can be substituted dynamically
template <class BaseTheme>
class ThemeProxy {
public:
virtual ~ThemeProxy() { }
virtual Signal<> &reconfigSig() = 0;
virtual BaseTheme &operator *() = 0;
virtual const BaseTheme &operator *() const = 0;
virtual BaseTheme *operator ->() { return &(**this); }
virtual const BaseTheme *operator ->() const { return &(**this); }
};
/// Singleton theme manager
/**
Use this to load all the registred themes
*/
class ThemeManager {
public:
typedef std::list<FbTk::Theme *> ThemeList;
typedef std::vector<ThemeList> ScreenThemeVector;
static ThemeManager &instance();
/// load style file "filename" to screen
bool load(const std::string &filename, const std::string &overlay_filename, int screen_num = -1);
std::string resourceValue(const std::string &name, const std::string &altname);
void loadTheme(Theme &tm);
bool loadItem(ThemeItem_base &resource);
bool loadItem(ThemeItem_base &resource, const std::string &name, const std::string &altname);
bool verbose() const { return m_verbose; }
void setVerbose(bool value) { m_verbose = value; }
// dump theme out to filename, stdout if no filename is given
void dump(Theme& theme, const char* filename = 0) const;
// void listItems();
private:
ThemeManager();
~ThemeManager() { }
friend class FbTk::Theme; // so only theme can register itself in constructor
/// @return false if screen_num if out of
/// range or theme already registered, else true
bool registerTheme(FbTk::Theme &tm);
/// @return false if theme isn't registred in the manager
bool unregisterTheme(FbTk::Theme &tm);
/// map each theme manager to a screen
ScreenThemeVector m_themes;
int m_max_screens;
XrmDatabaseHelper m_database;
bool m_verbose;
std::string m_themelocation;
};
template <typename T>
ThemeItem<T>::ThemeItem(FbTk::Theme &tm,
const std::string &name, const std::string &altname):
ThemeItem_base(name, altname),
m_tm(tm) {
tm.add(*this);
setDefaultValue();
}
template <typename T>
ThemeItem<T>::~ThemeItem() {
m_tm.remove(*this);
}
template <typename T>
void Theme::add(ThemeItem<T> &item) {
m_themeitems.push_back(&item);
m_themeitems.unique();
}
template <typename T>
void Theme::remove(ThemeItem<T> &item) {
m_themeitems.remove(&item);
}
} // end namespace FbTk
#endif // FBTK_THEME_HH
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