1 files changed, 205 insertions, 0 deletions

diff --git a/src/FbTk/Resource.cc b/src/FbTk/Resource.cc
new file mode 100644
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--- /dev/null
+++ b/src/FbTk/Resource.cc
@@ -0,0 +1,205 @@
+// Resource.cc
+// 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.cc,v 1.4 2003/12/19 18:25:39 fluxgen Exp $
+
+#include "XrmDatabaseHelper.hh"
+#include "Resource.hh"
+
+#include <iostream>
+#include <cassert>
+
+using namespace std;
+
+namespace FbTk {
+
+ResourceManager::ResourceManager(const char *filename, bool lock_db) :
+ m_db_lock(0),
+ m_database(0),
+ m_filename(filename)
+{
+    ensureXrmIsInitialize();
+
+    if (lock_db)
+        lock();
+}
+
+ResourceManager::~ResourceManager() {
+    if (m_database)
+        delete m_database;
+}
+
+bool ResourceManager::m_init = false;
+
+/**
+  reloads all resources from resourcefile 
+  @return true on success else false
+*/
+bool ResourceManager::load(const char *filename) {
+    m_filename = filename;
+
+    // force reload (lock will ensure it exists)
+    if (m_database) {
+        delete m_database;
+        m_database = 0;
+    }
+
+    lock();
+    if (!m_database) {
+        unlock();
+        return false;
+    }
+        
+    XrmValue value;
+    char *value_type;
+        
+    //get list and go throu all the resources and load them
+    ResourceList::iterator i = m_resourcelist.begin();
+    ResourceList::iterator i_end = m_resourcelist.end();        
+    for (; i != i_end; ++i) {
+        
+        Resource_base *resource = *i;
+        if (XrmGetResource(**m_database, resource->name().c_str(),
+                           resource->altName().c_str(), &value_type, &value))                   
+            resource->setFromString(value.addr);
+        else {
+            cerr<<"Failed to read: "<<resource->name()<<endl;
+            cerr<<"Setting default value"<<endl;
+            resource->setDefaultValue();
+        }
+    }
+
+    unlock();
+
+    return true;
+}
+
+/**
+ Saves all the resource to a file
+ @return 0 on success  else negative value representing the error
+*/
+bool ResourceManager::save(const char *filename, const char *mergefilename) {
+    assert(filename);
+    
+    // empty database
+    XrmDatabaseHelper database;
+
+    string rc_string;   
+    ResourceList::iterator i = m_resourcelist.begin();
+    ResourceList::iterator i_end = m_resourcelist.end();
+    //write all resources to database
+    for (; i != i_end; ++i) {
+        Resource_base *resource = *i;
+        rc_string = resource->name() + string(": ") + resource->getString();
+        XrmPutLineResource(&*database, rc_string.c_str());
+    }
+
+    if (database==0)
+        return false;
+
+    //check if we want to merge a database
+    if (mergefilename) {
+        // force reload of file
+        m_filename = mergefilename;
+        if (m_database) 
+            delete m_database;
+        m_database = 0;
+
+        lock();
+
+        if (!m_database) {
+            unlock();
+            return false;
+        }
+
+        XrmMergeDatabases(*database, &**m_database); // merge databases
+        XrmPutFileDatabase(**m_database, filename); // save database to file
+
+        // don't try to destroy the database (XrmMergeDatabases destroys it)
+        *database = 0;
+        unlock();
+    } else // save database to file
+        XrmPutFileDatabase(*database, filename);
+
+    m_filename = filename;
+    return true;
+}
+
+Resource_base *ResourceManager::findResource(const std::string &resname) {
+   // find resource name
+    ResourceList::iterator i = m_resourcelist.begin();
+    ResourceList::iterator i_end = m_resourcelist.end();
+    for (; i != i_end; ++i) {
+        if ((*i)->name() == resname ||
+            (*i)->altName() == resname) 
+            return *i;
+    }
+    return 0;
+}
+
+string ResourceManager::resourceValue(const std::string &resname) {
+    Resource_base *res = findResource(resname);
+    if (res != 0)
+        return res->getString();
+
+    return "";
+}
+
+void ResourceManager::setResourceValue(const std::string &resname, const std::string &value) {
+    Resource_base *res = findResource(resname);
+    if (res != 0)
+        res->setFromString(value.c_str());
+
+}
+
+void ResourceManager::ensureXrmIsInitialize() {
+    if (!m_init) {
+        XrmInitialize();
+        m_init = true;
+    }
+}
+
+ResourceManager &ResourceManager::lock() {
+    ++m_db_lock;
+    // if the lock was zero, then load the database
+    if ((m_db_lock == 1 || !m_database) &&
+        m_filename != "") {
+        m_database = new XrmDatabaseHelper(m_filename.c_str());
+
+        // check that the database loaded ok
+        if (m_database && *m_database == 0) {
+            // didn't work
+            delete m_database;
+            m_database = 0;
+        }
+    }
+
+    return *this;
+}
+
+void ResourceManager::unlock() {
+    if (--m_db_lock == 0 && m_database) {
+        delete m_database;
+        m_database = 0;
+    }
+}
+
+}; // end namespace FbTk