Resource.hh // Resource.hh // Copyright (c) 2002-2003 Henrik Kinnunen (fluxgen(at)users.sourceforge.net) // // 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. // $Id: Resource.hh,v 1.7 2003/12/19 18:25:39 fluxgen Exp $ #ifndef FBTK_RESOURCE_HH #define FBTK_RESOURCE_HH #include "NotCopyable.hh" #include <string> #include <list> #include <iostream> #include <X11/Xlib.h> #include <X11/Xresource.h> namespace FbTk { class XrmDatabaseHelper; class Resource_base:private FbTk::NotCopyable { public: virtual ~Resource_base() { }; virtual void setFromString(char const *strval) = 0; virtual void setDefaultValue() = 0; virtual std::string getString() = 0; inline const std::string& altName() const { return m_altname; } inline const std::string& name() const { return m_name; } protected: Resource_base(const std::string &name, const std::string &altname): m_name(name), m_altname(altname) { } private: std::string m_name; std::string m_altname; }; template <typename T> class Resource; class ResourceManager { public: typedef std::list<Resource_base *> ResourceList; // lock specifies if the database should be opened with one level locked // (useful for constructing inside initial set of constructors) ResourceManager(const char *filename, bool lock_db); virtual ~ResourceManager(); virtual bool load(const char *filename); virtual bool save(const char *filename, const char *mergefilename=0); template <class T> void addResource(Resource<T> &r); template <class T> void removeResource(Resource<T> &r) { m_resourcelist.remove(&r); } Resource_base *findResource(const std::string &resourcename); std::string resourceValue(const std::string &resourcename); void setResourceValue(const std::string &resourcename, const std::string &value); // this marks the database as "in use" and will avoid reloading // resources unless it is zero. // It returns this resource manager. Useful for passing to // constructors like Object(m_rm.lock()) ResourceManager &lock(); void unlock(); // for debugging inline int lockDepth() const { return m_db_lock; } void dump() { ResourceList::iterator it = m_resourcelist.begin(); ResourceList::iterator it_end = m_resourcelist.end(); for (; it != it_end; ++it) { std::cerr<<(*it)->name()<<std::endl; } } protected: static void ensureXrmIsInitialize(); int m_db_lock; private: static bool m_init; ResourceList m_resourcelist; XrmDatabaseHelper *m_database; std::string m_filename; }; template <typename T> class Resource:public Resource_base { public: Resource(ResourceManager &rm, T val, const std::string &name, const std::string &altname): Resource_base(name, altname), m_value(val), m_defaultval(val), m_rm(rm) { m_rm.addResource(*this); // add this to resource handler } virtual ~Resource() { m_rm.removeResource(*this); // remove this from resource handler } inline void setDefaultValue() { m_value = m_defaultval; } void setFromString(const char *strval); inline Resource<T>& operator = (const T& newvalue) { m_value = newvalue; return *this;} std::string getString(); inline T& operator*() { return m_value; } inline const T& operator*() const { return m_value; } inline T *operator->() { return &m_value; } inline const T *operator->() const { return &m_value; } private: T m_value, m_defaultval; ResourceManager &m_rm; }; // add the resource and load its value template <class T> void ResourceManager::addResource(Resource<T> &r) { m_resourcelist.push_back(&r); m_resourcelist.unique(); // lock ensures that the database is loaded. lock(); if (m_database == 0) { unlock(); return; } XrmValue value; char *value_type; // now, load the value for this resource if (XrmGetResource(**m_database, r.name().c_str(), r.altName().c_str(), &value_type, &value)) { r.setFromString(value.addr); } else { std::cerr<<"Failed to read: "<<r.name()<<std::endl; std::cerr<<"Setting default value"<<std::endl; r.setDefaultValue(); } unlock(); } } // end namespace FbTk #endif // FBTK_RESOURCE_HH Fluxbox CVS-Jan-2003
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