src/FbTk/App.cc (raw)
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// App.cc // 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. #include "App.hh" #include "FbString.hh" #include "Font.hh" #include "Image.hh" #include "EventManager.hh" #include <cstring> #include <cstdlib> #include <set> #include <iostream> namespace FbTk { App *App::s_app = 0; App *App::instance() { if (s_app == 0) throw std::string("You must create an instance of FbTk::App first!"); return s_app; } App::App(const char *displayname):m_done(false), m_display(0) { if (s_app != 0) throw std::string("Can't create more than one instance of FbTk::App"); s_app = this; // this allows the use of std::string.c_str(), which returns // a blank string, rather than a null string, so we make them equivalent if (displayname != 0 && displayname[0] == '\0') displayname = 0; m_display = XOpenDisplay(displayname); if (!m_display) { if (displayname) { throw std::string("Couldn't connect to XServer") + displayname; } else { throw std::string("Couldn't connect to XServer passing null display"); } } FbStringUtil::init(); } App::~App() { if (m_display != 0) { Font::shutdown(); XCloseDisplay(m_display); m_display = 0; } s_app = 0; } void App::sync(bool discard) { XSync(display(), discard); } void App::eventLoop() { XEvent ev; while (!m_done) { XNextEvent(display(), &ev); EventManager::instance()->handleEvent(ev); } } void App::end() { m_done = true; //end loop in App::eventLoop } bool App::setenv(const char* key, const char* value) { if (!key || !*key) return false; static std::set<char*> stored; const size_t key_size = strlen(key); const size_t value_size = value ? strlen(value) : 0; const size_t newenv_size = key_size + value_size + 2; char* newenv = new char[newenv_size]; if (!newenv) { return false; } // someone might have used putenv("key=value") (or setenv()) before. // if getenv("key") succeeds, the returning value points to the address // of "value" (right after the "="). this means, that that address // minus "key=" points to the beginning of what was set. if fluxbox // set that variable we have the pointer in "stored" and can dealloc it. // // we use putenv() to have control over the dealloction (valgrind and // other complaint about it) char* oldenv = getenv(key); if (oldenv) { oldenv = oldenv - (key_size + 1); } if (stored.find(oldenv) == stored.end()) { oldenv = NULL; } // create the new environment strncpy(newenv, key, key_size); newenv[key_size] = '='; if (value_size > 0) { strncpy(newenv+key_size+1, value, value_size); } newenv[newenv_size-1] = 0; if (putenv(newenv) == 0) { if (oldenv) { stored.erase(oldenv); delete[] oldenv; } stored.insert(newenv); } return true; } } // end namespace FbTk |