ede/pekwm/ColorHandler.cc
2011-10-23 00:10:40 +00:00

142 lines
3.6 KiB
C++

//
// Copyright © 2004-2009 Claes Nästén <me{@}pekdon{.}net>
//
// This program is licensed under the GNU GPL.
// See the LICENSE file for more information.
//
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif // HAVE_CONFIG_H
#include "ColorHandler.hh"
#include "PScreen.hh"
#include <cstring>
#ifdef DEBUG
#include <iostream>
using std::cerr;
using std::endl;
#endif // DEBUG
using std::list;
using std::string;
ColorHandler* ColorHandler::_instance = 0;
//! @brief ColorHandler constructor
ColorHandler::ColorHandler(Display *dpy)
: _dpy(dpy),
_free_on_return(false)
{
#ifdef DEBUG
if (_instance) {
cerr << __FILE__ << "@" << __LINE__ << ": " << endl
<< "ColorHandler(" << this << ")::ColorHandler(" << _dpy << ")"
<< endl << " *** _instance already set" << endl;
}
#endif // DEBUG
_instance = this;
// setup default color
_xc_default.pixel = PScreen::instance()->getBlackPixel();
_xc_default.red = _xc_default.green = _xc_default.blue = 0;
}
//! @brief ColorHandler destructor
ColorHandler::~ColorHandler(void)
{
freeColors(true);
_instance = 0;
}
//! @brief Gets or allocs a color
XColor*
ColorHandler::getColor(const std::string &color)
{
// check for already existing entry
list<ColorHandler::Entry*>::iterator it(_color_list.begin());
if (strcasecmp(color.c_str(), "EMPTY") == 0) {
return &_xc_default;
}
for (; it != _color_list.end(); ++it) {
if (*(*it) == color) {
(*it)->incRef();
return (*it)->getColor();
}
}
// create new entry
ColorHandler::Entry *entry = new ColorHandler::Entry(color);
entry->incRef();
// X alloc
XColor dummy;
if (XAllocNamedColor(_dpy, PScreen::instance()->getColormap(),
color.c_str(), entry->getColor(), &dummy) == 0) {
#ifdef DEBUG
cerr << __FILE__ << "@" << __LINE__ << ": "
<< "ColorHandler(" << this << ")::getColor(" << color << ")" << endl
<< " *** failed to alloc color: " << color << endl;
#endif // DEBUG
delete entry;
entry = 0;
} else {
_color_list.push_back(entry);
}
return (entry) ? entry->getColor() : &_xc_default;
}
//! @brief Returns a color
void
ColorHandler::returnColor(XColor *xc)
{
if (&_xc_default == xc) { // no need to return default color
return;
}
list<ColorHandler::Entry*>::iterator it(_color_list.begin());
for (; it != _color_list.end(); ++it) {
if ((*it)->getColor() == xc) {
(*it)->decRef();
if (_free_on_return && ((*it)->getRef() == 0)) {
ulong pixels[1] = { (*it)->getColor()->pixel };
XFreeColors(_dpy, PScreen::instance()->getColormap(), pixels, 1, 0);
delete *it;
_color_list.erase(it);
}
break;
}
}
}
//! @brief Frees color allocated by ColorHandler
//! @param all If false free on only unref colors
void
ColorHandler::freeColors(bool all)
{
list<ulong> pixel_list;
list<ColorHandler::Entry*>::iterator it(_color_list.begin());
for (; it != _color_list.end(); ++it) {
if (all || ((*it)->getRef() == 0)) {
pixel_list.push_back((*it)->getColor()->pixel);
delete *it;
}
}
if (pixel_list.size() > 0) {
ulong *pixels = new ulong[pixel_list.size()];
copy(pixel_list.begin(), pixel_list.end(), pixels);
XFreeColors(_dpy, PScreen::instance()->getColormap(),
pixels, pixel_list.size(), 0);
delete [] pixels;
}
}