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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;
// with recent versions of X11 one needs to specify XSetLocaleModifiers,
// otherwise no extra events won't be generated.
const bool setmodifiers = XSetLocaleModifiers("@im=none");
// 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();
m_xim = 0;
if (setmodifiers && FbStringUtil::haveUTF8()) {
m_xim = XOpenIM(m_display, NULL, NULL, NULL);
}
}
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
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