rxvt-unicode/src/rxvttoolkit.C

/*--------------------------------*-C-*---------------------------------*
 * File:        rxvttoolkit.C
 *----------------------------------------------------------------------*
 *
 * All portions of code are copyright by their respective author/s.
 * Copyright (c) 2003-2004 Marc Lehmann <pcg@goof.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *----------------------------------------------------------------------*/

#include "../config.h"
#include <rxvt.h>
#include <rxvttoolkit.h>

#include <unistd.h>
#include <fcntl.h>

#include <sys/utsname.h>

#ifndef NO_SLOW_LINK_SUPPORT
# include <sys/socket.h>
# include <sys/un.h>
#endif

refcounted::refcounted (const char *id)
{
  this->id = strdup (id);
}

refcounted::~refcounted ()
{
  free (id);
}

template<class T>
T *refcache<T>::get (const char *id)
{
  for (T **i = this->begin (); i < this->end (); ++i)
    {
      if (!strcmp (id, (*i)->id))
        {
          ++(*i)->referenced;
          (*i)->ref_next ();
          return *i;
        }
    }

  T *obj = new T (id);

  if (obj && obj->ref_init ())
    {
      obj->referenced = 1;
      this->push_back (obj);
      return obj;
    }
  else
    {
      delete obj;
      return 0;
    }
}

template<class T>
void refcache<T>::put (T *obj)
{
  if (!obj)
    return;

  if (!--obj->referenced)
    {
      this->erase (find (this->begin (), this->end (), obj));
      delete obj;
    }
}

template<class T>
void refcache<T>::clear ()
{
  while (this->size ())
    put (*this->begin ());
}

/////////////////////////////////////////////////////////////////////////////

#ifdef USE_XIM

static void
#if XIMCB_PROTO_BROKEN
im_destroy_cb (XIC unused1, XPointer client_data, XPointer unused3)
#else
im_destroy_cb (XIM unused1, XPointer client_data, XPointer unused3)
#endif
{
  rxvt_xim *xim = (rxvt_xim *)client_data;
  rxvt_display *display = xim->display;

  xim->xim = 0;

  display->xims.erase (find (display->xims.begin (), display->xims.end (), xim));
  display->im_change_cb ();
}

bool
rxvt_xim::ref_init ()
{
  display = GET_R->display; //HACK: TODO

  xim = XOpenIM (display->display, NULL, NULL, NULL);

  if (!xim)
    return false;

  XIMCallback ximcallback;
  ximcallback.client_data = (XPointer)this;
  ximcallback.callback = im_destroy_cb;

  XSetIMValues (xim, XNDestroyCallback, &ximcallback, NULL);

  return true;
}

rxvt_xim::~rxvt_xim ()
{
  if (xim)
    XCloseIM (xim);
}

#endif

/////////////////////////////////////////////////////////////////////////////

rxvt_display::rxvt_display (const char *id)
: refcounted (id)
, x_ev (this, &rxvt_display::x_cb)
, selection_owner (0)
{
}

XrmDatabase
rxvt_display::get_resources ()
{
  char *homedir = (char *)getenv ("HOME");
  char fname[1024];

  /*
   * get resources using the X library function
   */
  char *displayResource, *xe;
  XrmDatabase database, rdb1;

  database = NULL;

  // for ordering, see for example http://www.faqs.org/faqs/Xt-FAQ/ Subject: 20

  // 6. System wide per application default file.

  /* Add in $XAPPLRESDIR/Rxvt only; not bothering with XUSERFILESEARCHPATH */
  if ((xe = (char *)getenv ("XAPPLRESDIR")))
    {
      snprintf (fname, sizeof (fname), "%s/%s", xe, RESCLASS);

      if ((rdb1 = XrmGetFileDatabase (fname)))
        XrmMergeDatabases (rdb1, &database);
    }

  // 5. User's per application default file.
  // none

  // 4. User's defaults file.
  /* Get any Xserver defaults */
  displayResource = XResourceManagerString (display);

  if (displayResource != NULL)
    {
      if ((rdb1 = XrmGetStringDatabase (displayResource)))
        XrmMergeDatabases (rdb1, &database);
    }
  else if (homedir)
    {
      snprintf (fname, sizeof (fname), "%s/.Xdefaults", homedir);

      if ((rdb1 = XrmGetFileDatabase (fname)))
        XrmMergeDatabases (rdb1, &database);
    }

  /* Get screen specific resources */
  displayResource = XScreenResourceString (ScreenOfDisplay (display, screen));

  if (displayResource != NULL)
    {
      if ((rdb1 = XrmGetStringDatabase (displayResource)))
        /* Merge with screen-independent resources */
        XrmMergeDatabases (rdb1, &database);

      XFree (displayResource);
    }

  // 3. User's per host defaults file
  /* Add in XENVIRONMENT file */
  if ((xe = (char *)getenv ("XENVIRONMENT"))
      && (rdb1 = XrmGetFileDatabase (xe)))
    XrmMergeDatabases (rdb1, &database);
  else if (homedir)
    {
      struct utsname un;

      if (!uname (&un))
        {
          snprintf (fname, sizeof (fname), "%s/.Xdefaults-%s", homedir, un.nodename);

          if ((rdb1 = XrmGetFileDatabase (fname)))
            XrmMergeDatabases (rdb1, &database);
        }
    }

  return database;
}

bool rxvt_display::ref_init ()
{
#ifdef LOCAL_X_IS_UNIX
  if (id[0] == ':')
    {
      val = rxvt_malloc (5 + strlen (id) + 1);
      strcpy (val, "unix/");
      strcat (val, id);
      display = XOpenDisplay (val);
      free (val);
    }
  else
#endif
    display = 0;

  if (!display)
    display = XOpenDisplay (id);

  if (!display)
    return false;

  screen = DefaultScreen (display);
  root   = DefaultRootWindow (display);
  visual = DefaultVisual (display, screen);
  cmap   = DefaultColormap (display, screen);
  depth  = DefaultDepth (display, screen);

  XrmSetDatabase (display, get_resources ());

#ifdef POINTER_BLANK
  XColor blackcolour;
  blackcolour.red   = 0;
  blackcolour.green = 0;
  blackcolour.blue  = 0;
  Font f = XLoadFont (display, "fixed");
  blank_cursor = XCreateGlyphCursor (display, f, f, ' ', ' ',
                                     &blackcolour, &blackcolour);
  XUnloadFont (display, f);
#endif

#ifdef PREFER_24BIT
  /*
   * If depth is not 24, look for a 24bit visual.
   */
  if (depth != 24)
    {
      XVisualInfo vinfo;

      if (XMatchVisualInfo (display, screen, 24, TrueColor, &vinfo))
        {
          depth = 24;
          visual = vinfo.visual;
          cmap = XCreateColormap (display,
                                  RootWindow (display, screen),
                                  visual, AllocNone);
        }
    }
#endif

  int fd = XConnectionNumber (display);

#ifndef NO_SLOW_LINK_SUPPORT
  // try to detect wether we have a local connection.
  // assume unix domains socket == local, everything else not
  // TODO: might want to check for inet/127.0.0.1
  is_local = 0;
  sockaddr_un sa;
  socklen_t sl = sizeof (sa);

  if (!getsockname (fd, (sockaddr *)&sa, &sl))
    is_local = sa.sun_family == AF_LOCAL;
#endif

  x_ev.start (fd, EVENT_READ);
  fcntl (fd, F_SETFD, FD_CLOEXEC);

  XSelectInput (display, root, PropertyChangeMask);
#ifdef USE_XIM
  xa_xim_servers = XInternAtom (display, "XIM_SERVERS", 0);
#endif

  flush ();

  return true;
}

void
rxvt_display::ref_next ()
{
  // TODO: somehow check wether the database files/resources changed
  // before re-loading/parsing
  XrmDestroyDatabase (XrmGetDatabase (display));
  XrmSetDatabase (display, get_resources ());
}

rxvt_display::~rxvt_display ()
{
  if (!display)
    return;

#ifdef POINTER_BLANK
  XFreeCursor (display, blank_cursor);
#endif
  x_ev.stop ();
#ifdef USE_XIM
  xims.clear ();
#endif
  XCloseDisplay (display);
}

#ifdef USE_XIM
void rxvt_display::im_change_cb ()
{
  for (im_watcher **i = imw.begin (); i != imw.end (); ++i)
    (*i)->call ();
}

void rxvt_display::im_change_check ()
{
  // try to only call im_change_cb when a new input method
  // registers, as xlib crashes due to a race otherwise.
  Atom actual_type, *atoms;
  int actual_format;
  unsigned long nitems, bytes_after;

  if (XGetWindowProperty (display, root, xa_xim_servers, 0L, 1000000L,
                          False, XA_ATOM, &actual_type, &actual_format,
                          &nitems, &bytes_after, (unsigned char **)&atoms)
      != Success )
    return;

  if (actual_type == XA_ATOM  && actual_format == 32)
    for (int i = 0; i < nitems; i++)
      if (XGetSelectionOwner (display, atoms[i]))
        {
          im_change_cb ();
          break;
        }

  XFree (atoms);
}
#endif

void rxvt_display::x_cb (io_watcher &w, short revents)
{
  do
    {
      XEvent xev;
      XNextEvent (display, &xev);

#ifdef USE_XIM
      if (!XFilterEvent (&xev, None))
        {
          if (xev.type == PropertyNotify
              && xev.xany.window == root
              && xev.xproperty.atom == xa_xim_servers)
            im_change_check ();
#endif
          for (int i = xw.size (); i--; )
            {
              if (!xw[i])
                xw.erase_unordered (i);
              else if (xw[i]->window == xev.xany.window)
                xw[i]->call (xev);
            }
#ifdef USE_XIM
        }
#endif
    }
  while (XEventsQueued (display, QueuedAlready));

  XFlush (display);
}

void rxvt_display::flush ()
{
  if (XEventsQueued (display, QueuedAlready))
    x_cb (x_ev, EVENT_READ);

  XFlush (display);
}

void rxvt_display::reg (xevent_watcher *w)
{
  xw.push_back (w);
  w->active = xw.size ();
}

void rxvt_display::unreg (xevent_watcher *w)
{
  if (w->active)
    xw[w->active - 1] = 0;
}

void rxvt_display::set_selection_owner (rxvt_term *owner)
{
  if (selection_owner && selection_owner != owner)
    selection_owner->selection_clear ();

  selection_owner = owner;
}

#ifdef USE_XIM
void rxvt_display::reg (im_watcher *w)
{
  imw.push_back (w);
}

void rxvt_display::unreg (im_watcher *w)
{
  imw.erase (find (imw.begin (), imw.end (), w));
}

rxvt_xim *rxvt_display::get_xim (const char *locale, const char *modifiers)
{
  char *id;
  int l, m;

  l = strlen (locale);
  m = strlen (modifiers);

  if (!(id = (char *)malloc (l + m + 2)))
    return 0;

  memcpy (id, locale, l); id[l] = '\n';
  memcpy (id + l + 1, modifiers, m); id[l + m + 1] = 0;

  rxvt_xim *xim = xims.get (id);

  free (id);

  return xim;
}

void rxvt_display::put_xim (rxvt_xim *xim)
{
#if XLIB_IS_RACEFREE
  xims.put (xim);
#endif
}
#endif

Atom rxvt_display::atom (const char *name)
{
  return XInternAtom (display, name, False);
}

/////////////////////////////////////////////////////////////////////////////

template class refcache<rxvt_display>;
refcache<rxvt_display> displays;

/////////////////////////////////////////////////////////////////////////////
  
bool
rxvt_color::set (rxvt_display *display, Pixel p)
{
#if XFT
  XColor xc;

  xc.pixel = p;
  if (!XQueryColor (display->display, display->cmap, &xc))
    return false;

  XRenderColor d;

  d.red   = xc.red;
  d.green = xc.green;
  d.blue  = xc.blue;
  d.alpha = 0xffff;

  return
    XftColorAllocValue (display->display, 
                        display->visual,
                        display->cmap,
                        &d, &c);
#else
  this->p = p;
#endif

  return true;
}

bool
rxvt_color::set (rxvt_display *display, const char *name)
{
#if XFT
  return XftColorAllocName (display->display, display->visual, display->cmap,
                            name, &c);
#else
  XColor xc;

  if (XParseColor (display->display, display->cmap, name, &xc))
    return set (display, xc.red, xc.green, xc.blue);

  return false;
#endif
}

bool
rxvt_color::set (rxvt_display *display, unsigned short cr, unsigned short cg, unsigned short cb)
{
  XColor xc;

  xc.red   = cr;
  xc.green = cg;
  xc.blue  = cb;
  xc.flags = DoRed | DoGreen | DoBlue;

  if (XAllocColor (display->display, display->cmap, &xc))
    return set (display, xc.pixel);

  return false;
}

void 
rxvt_color::get (rxvt_display *display, unsigned short &cr, unsigned short &cg, unsigned short &cb)
{
#if XFT
  cr = c.color.red;
  cg = c.color.green;
  cb = c.color.blue;
#else
  XColor c;

  c.pixel = p;
  XQueryColor (display->display, display->cmap, &c);

  cr = c.red;
  cg = c.green;
  cb = c.blue;
#endif
}

void 
rxvt_color::free (rxvt_display *display)
{
#if XFT
  XftColorFree (display->display, display->visual, display->cmap, &c);
#else
  XFreeColors (display->display, display->cmap, &p, 1, AllPlanes);
#endif
}

rxvt_color
rxvt_color::fade (rxvt_display *display, int percent)
{
  percent = 100 - percent;

  unsigned short cr, cg, cb;
  rxvt_color faded;

  get (display, cr, cg, cb);

  faded.set (
    display,
    cr * percent / 100,
    cg * percent / 100,
    cb * percent / 100
  );

  return faded;
}

#define LERP(a,b,p) (a * p + b * (100 - p)) / 100

rxvt_color
rxvt_color::fade (rxvt_display *display, int percent, rxvt_color &fadeto)
{
  percent = 100 - percent;

  unsigned short cr, cg, cb;
  unsigned short fcr, fcg, fcb;
  rxvt_color faded;
  
  get (display, cr, cg, cb);
  fadeto.get(display, fcr, fcg, fcb);

  faded.set (
    display,
    LERP (cr, fcr, percent),
    LERP (cg, fcg, percent),
    LERP (cb, fcb, percent)
  );

  return faded;
}

Revision:	1.24
Committed:	Wed Jan 25 00:42:21 2006 UTC (18 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.23:	+2 -0 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	/---------------------------------C----------------------------------
2	root	1.5	* File: rxvttoolkit.C
3	root	1.1	----------------------------------------------------------------------
4			*
5			* All portions of code are copyright by their respective author/s.
6			* Copyright (c) 2003-2004 Marc Lehmann <pcg@goof.com>
7			*
8			* This program is free software; you can redistribute it and/or modify
9			* it under the terms of the GNU General Public License as published by
10			* the Free Software Foundation; either version 2 of the License, or
11			* (at your option) any later version.
12			*
13			* This program is distributed in the hope that it will be useful,
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16			* GNU General Public License for more details.
17			*
18			* You should have received a copy of the GNU General Public License
19			* along with this program; if not, write to the Free Software
20			* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21			----------------------------------------------------------------------/
22
23			#include "../config.h"
24			#include <rxvt.h>
25			#include <rxvttoolkit.h>
26
27			#include <unistd.h>
28			#include <fcntl.h>
29
30	root	1.23	#include <sys/utsname.h>
31
32	root	1.1	#ifndef NO_SLOW_LINK_SUPPORT
33			# include <sys/socket.h>
34			# include <sys/un.h>
35			#endif
36
37			refcounted::refcounted (const char *id)
38			{
39	root	1.2	this->id = strdup (id);
40	root	1.1	}
41
42			refcounted::~refcounted ()
43			{
44			free (id);
45			}
46
47			template<class T>
48			T refcache<T>::get (const char id)
49			{
50			for (T **i = this->begin (); i < this->end (); ++i)
51			{
52			if (!strcmp (id, (*i)->id))
53			{
54	root	1.23	++(*i)->referenced;
55			(*i)->ref_next ();
56	root	1.1	return *i;
57			}
58			}
59
60			T *obj = new T (id);
61
62	root	1.23	if (obj && obj->ref_init ())
63	root	1.1	{
64	root	1.23	obj->referenced = 1;
65	root	1.1	this->push_back (obj);
66			return obj;
67			}
68			else
69			{
70			delete obj;
71			return 0;
72			}
73			}
74
75			template<class T>
76			void refcache<T>::put (T *obj)
77			{
78			if (!obj)
79			return;
80
81			if (!--obj->referenced)
82			{
83			this->erase (find (this->begin (), this->end (), obj));
84			delete obj;
85			}
86			}
87
88			template<class T>
89	root	1.12	void refcache<T>::clear ()
90	root	1.1	{
91			while (this->size ())
92			put (*this->begin ());
93			}
94
95			/////////////////////////////////////////////////////////////////////////////
96
97			#ifdef USE_XIM
98	root	1.24
99	root	1.1	static void
100			#if XIMCB_PROTO_BROKEN
101			im_destroy_cb (XIC unused1, XPointer client_data, XPointer unused3)
102			#else
103			im_destroy_cb (XIM unused1, XPointer client_data, XPointer unused3)
104			#endif
105			{
106			rxvt_xim xim = (rxvt_xim )client_data;
107			rxvt_display *display = xim->display;
108
109	root	1.5	xim->xim = 0;
110
111	root	1.1	display->xims.erase (find (display->xims.begin (), display->xims.end (), xim));
112			display->im_change_cb ();
113			}
114
115	root	1.23	bool
116			rxvt_xim::ref_init ()
117	root	1.1	{
118			display = GET_R->display; //HACK: TODO
119
120			xim = XOpenIM (display->display, NULL, NULL, NULL);
121
122			if (!xim)
123			return false;
124
125			XIMCallback ximcallback;
126			ximcallback.client_data = (XPointer)this;
127			ximcallback.callback = im_destroy_cb;
128
129			XSetIMValues (xim, XNDestroyCallback, &ximcallback, NULL);
130
131			return true;
132			}
133
134			rxvt_xim::~rxvt_xim ()
135			{
136			if (xim)
137			XCloseIM (xim);
138			}
139	root	1.24
140	root	1.1	#endif
141
142			/////////////////////////////////////////////////////////////////////////////
143
144			rxvt_display::rxvt_display (const char *id)
145			: refcounted (id)
146			, x_ev (this, &rxvt_display::x_cb)
147			, selection_owner (0)
148			{
149			}
150
151	root	1.23	XrmDatabase
152			rxvt_display::get_resources ()
153			{
154			char homedir = (char )getenv ("HOME");
155			char fname[1024];
156
157			/*
158			* get resources using the X library function
159			*/
160			char displayResource, xe;
161			XrmDatabase database, rdb1;
162
163			database = NULL;
164
165			// for ordering, see for example http://www.faqs.org/faqs/Xt-FAQ/ Subject: 20
166
167			// 6. System wide per application default file.
168
169			/* Add in $XAPPLRESDIR/Rxvt only; not bothering with XUSERFILESEARCHPATH */
170			if ((xe = (char *)getenv ("XAPPLRESDIR")))
171			{
172			snprintf (fname, sizeof (fname), "%s/%s", xe, RESCLASS);
173
174			if ((rdb1 = XrmGetFileDatabase (fname)))
175			XrmMergeDatabases (rdb1, &database);
176			}
177
178			// 5. User's per application default file.
179			// none
180
181			// 4. User's defaults file.
182			/* Get any Xserver defaults */
183			displayResource = XResourceManagerString (display);
184
185			if (displayResource != NULL)
186			{
187			if ((rdb1 = XrmGetStringDatabase (displayResource)))
188			XrmMergeDatabases (rdb1, &database);
189			}
190			else if (homedir)
191			{
192			snprintf (fname, sizeof (fname), "%s/.Xdefaults", homedir);
193
194			if ((rdb1 = XrmGetFileDatabase (fname)))
195			XrmMergeDatabases (rdb1, &database);
196			}
197
198			/* Get screen specific resources */
199			displayResource = XScreenResourceString (ScreenOfDisplay (display, screen));
200
201			if (displayResource != NULL)
202			{
203			if ((rdb1 = XrmGetStringDatabase (displayResource)))
204			/* Merge with screen-independent resources */
205			XrmMergeDatabases (rdb1, &database);
206
207			XFree (displayResource);
208			}
209
210			// 3. User's per host defaults file
211			/* Add in XENVIRONMENT file */
212			if ((xe = (char *)getenv ("XENVIRONMENT"))
213			&& (rdb1 = XrmGetFileDatabase (xe)))
214			XrmMergeDatabases (rdb1, &database);
215			else if (homedir)
216			{
217			struct utsname un;
218
219			if (!uname (&un))
220			{
221			snprintf (fname, sizeof (fname), "%s/.Xdefaults-%s", homedir, un.nodename);
222
223			if ((rdb1 = XrmGetFileDatabase (fname)))
224			XrmMergeDatabases (rdb1, &database);
225			}
226			}
227
228			return database;
229			}
230
231			bool rxvt_display::ref_init ()
232	root	1.1	{
233	root	1.14	#ifdef LOCAL_X_IS_UNIX
234			if (id[0] == ':')
235			{
236			val = rxvt_malloc (5 + strlen (id) + 1);
237			strcpy (val, "unix/");
238			strcat (val, id);
239			display = XOpenDisplay (val);
240			free (val);
241			}
242			else
243	root	1.15	#endif
244	root	1.14	display = 0;
245
246			if (!display)
247			display = XOpenDisplay (id);
248	root	1.1
249			if (!display)
250			return false;
251
252			screen = DefaultScreen (display);
253			root = DefaultRootWindow (display);
254			visual = DefaultVisual (display, screen);
255			cmap = DefaultColormap (display, screen);
256			depth = DefaultDepth (display, screen);
257
258	root	1.23	XrmSetDatabase (display, get_resources ());
259	root	1.1
260	root	1.12	#ifdef POINTER_BLANK
261			XColor blackcolour;
262			blackcolour.red = 0;
263			blackcolour.green = 0;
264			blackcolour.blue = 0;
265			Font f = XLoadFont (display, "fixed");
266			blank_cursor = XCreateGlyphCursor (display, f, f, ' ', ' ',
267			&blackcolour, &blackcolour);
268			XUnloadFont (display, f);
269			#endif
270
271	root	1.1	#ifdef PREFER_24BIT
272			/*
273			* If depth is not 24, look for a 24bit visual.
274			*/
275			if (depth != 24)
276			{
277			XVisualInfo vinfo;
278
279			if (XMatchVisualInfo (display, screen, 24, TrueColor, &vinfo))
280			{
281			depth = 24;
282			visual = vinfo.visual;
283			cmap = XCreateColormap (display,
284			RootWindow (display, screen),
285			visual, AllocNone);
286			}
287			}
288			#endif
289
290	root	1.23	int fd = XConnectionNumber (display);
291
292			#ifndef NO_SLOW_LINK_SUPPORT
293			// try to detect wether we have a local connection.
294			// assume unix domains socket == local, everything else not
295			// TODO: might want to check for inet/127.0.0.1
296			is_local = 0;
297			sockaddr_un sa;
298			socklen_t sl = sizeof (sa);
299
300			if (!getsockname (fd, (sockaddr *)&sa, &sl))
301			is_local = sa.sun_family == AF_LOCAL;
302			#endif
303
304	root	1.1	x_ev.start (fd, EVENT_READ);
305			fcntl (fd, F_SETFD, FD_CLOEXEC);
306
307			XSelectInput (display, root, PropertyChangeMask);
308			#ifdef USE_XIM
309			xa_xim_servers = XInternAtom (display, "XIM_SERVERS", 0);
310			#endif
311
312			flush ();
313
314			return true;
315			}
316
317	root	1.23	void
318			rxvt_display::ref_next ()
319			{
320			// TODO: somehow check wether the database files/resources changed
321			// before re-loading/parsing
322			XrmDestroyDatabase (XrmGetDatabase (display));
323			XrmSetDatabase (display, get_resources ());
324			}
325
326	root	1.1	rxvt_display::~rxvt_display ()
327			{
328	root	1.22	if (!display)
329			return;
330
331	root	1.21	#ifdef POINTER_BLANK
332			XFreeCursor (display, blank_cursor);
333			#endif
334	root	1.1	x_ev.stop ();
335	root	1.12	#ifdef USE_XIM
336			xims.clear ();
337			#endif
338	root	1.22	XCloseDisplay (display);
339	root	1.1	}
340
341			#ifdef USE_XIM
342			void rxvt_display::im_change_cb ()
343			{
344			for (im_watcher **i = imw.begin (); i != imw.end (); ++i)
345			(*i)->call ();
346			}
347	root	1.5
348			void rxvt_display::im_change_check ()
349			{
350	root	1.13	// try to only call im_change_cb when a new input method
351	root	1.5	// registers, as xlib crashes due to a race otherwise.
352			Atom actual_type, *atoms;
353			int actual_format;
354			unsigned long nitems, bytes_after;
355
356			if (XGetWindowProperty (display, root, xa_xim_servers, 0L, 1000000L,
357			False, XA_ATOM, &actual_type, &actual_format,
358			&nitems, &bytes_after, (unsigned char **)&atoms)
359			!= Success )
360			return;
361
362			if (actual_type == XA_ATOM && actual_format == 32)
363			for (int i = 0; i < nitems; i++)
364			if (XGetSelectionOwner (display, atoms[i]))
365			{
366			im_change_cb ();
367			break;
368			}
369
370			XFree (atoms);
371			}
372	root	1.1	#endif
373
374			void rxvt_display::x_cb (io_watcher &w, short revents)
375			{
376			do
377			{
378			XEvent xev;
379			XNextEvent (display, &xev);
380
381	root	1.5	#ifdef USE_XIM
382			if (!XFilterEvent (&xev, None))
383			{
384			if (xev.type == PropertyNotify
385			&& xev.xany.window == root
386			&& xev.xproperty.atom == xa_xim_servers)
387			im_change_check ();
388			#endif
389			for (int i = xw.size (); i--; )
390			{
391			if (!xw[i])
392			xw.erase_unordered (i);
393			else if (xw[i]->window == xev.xany.window)
394			xw[i]->call (xev);
395			}
396	root	1.1	#ifdef USE_XIM
397	root	1.5	}
398	root	1.1	#endif
399			}
400	root	1.6	while (XEventsQueued (display, QueuedAlready));
401	root	1.1
402	root	1.10	XFlush (display);
403	root	1.1	}
404
405			void rxvt_display::flush ()
406			{
407	root	1.10	if (XEventsQueued (display, QueuedAlready))
408			x_cb (x_ev, EVENT_READ);
409
410	root	1.8	XFlush (display);
411	root	1.1	}
412
413			void rxvt_display::reg (xevent_watcher *w)
414			{
415			xw.push_back (w);
416			w->active = xw.size ();
417			}
418
419			void rxvt_display::unreg (xevent_watcher *w)
420			{
421			if (w->active)
422			xw[w->active - 1] = 0;
423			}
424
425			void rxvt_display::set_selection_owner (rxvt_term *owner)
426			{
427			if (selection_owner && selection_owner != owner)
428			selection_owner->selection_clear ();
429
430			selection_owner = owner;
431			}
432
433			#ifdef USE_XIM
434			void rxvt_display::reg (im_watcher *w)
435			{
436			imw.push_back (w);
437			}
438
439			void rxvt_display::unreg (im_watcher *w)
440			{
441			imw.erase (find (imw.begin (), imw.end (), w));
442			}
443
444			rxvt_xim rxvt_display::get_xim (const char locale, const char *modifiers)
445			{
446			char *id;
447			int l, m;
448
449			l = strlen (locale);
450			m = strlen (modifiers);
451
452			if (!(id = (char *)malloc (l + m + 2)))
453			return 0;
454
455			memcpy (id, locale, l); id[l] = '\n';
456			memcpy (id + l + 1, modifiers, m); id[l + m + 1] = 0;
457
458			rxvt_xim *xim = xims.get (id);
459
460			free (id);
461
462			return xim;
463			}
464
465			void rxvt_display::put_xim (rxvt_xim *xim)
466			{
467	root	1.10	#if XLIB_IS_RACEFREE
468	root	1.1	xims.put (xim);
469	root	1.10	#endif
470	root	1.1	}
471			#endif
472
473			Atom rxvt_display::atom (const char *name)
474			{
475			return XInternAtom (display, name, False);
476			}
477
478			/////////////////////////////////////////////////////////////////////////////
479
480			template class refcache<rxvt_display>;
481			refcache<rxvt_display> displays;
482
483			/////////////////////////////////////////////////////////////////////////////
484
485			bool
486			rxvt_color::set (rxvt_display *display, Pixel p)
487			{
488			#if XFT
489			XColor xc;
490
491			xc.pixel = p;
492			if (!XQueryColor (display->display, display->cmap, &xc))
493			return false;
494
495			XRenderColor d;
496
497			d.red = xc.red;
498			d.green = xc.green;
499			d.blue = xc.blue;
500			d.alpha = 0xffff;
501
502			return
503			XftColorAllocValue (display->display,
504			display->visual,
505			display->cmap,
506			&d, &c);
507			#else
508			this->p = p;
509			#endif
510
511			return true;
512			}
513
514			bool
515			rxvt_color::set (rxvt_display display, const char name)
516			{
517	root	1.7	#if XFT
518			return XftColorAllocName (display->display, display->visual, display->cmap,
519			name, &c);
520			#else
521	root	1.1	XColor xc;
522
523			if (XParseColor (display->display, display->cmap, name, &xc))
524			return set (display, xc.red, xc.green, xc.blue);
525
526			return false;
527	root	1.7	#endif
528	root	1.1	}
529
530			bool
531			rxvt_color::set (rxvt_display *display, unsigned short cr, unsigned short cg, unsigned short cb)
532			{
533			XColor xc;
534
535			xc.red = cr;
536			xc.green = cg;
537			xc.blue = cb;
538			xc.flags = DoRed \| DoGreen \| DoBlue;
539
540			if (XAllocColor (display->display, display->cmap, &xc))
541			return set (display, xc.pixel);
542
543			return false;
544			}
545
546			void
547			rxvt_color::get (rxvt_display *display, unsigned short &cr, unsigned short &cg, unsigned short &cb)
548			{
549			#if XFT
550			cr = c.color.red;
551			cg = c.color.green;
552			cb = c.color.blue;
553			#else
554			XColor c;
555
556			c.pixel = p;
557			XQueryColor (display->display, display->cmap, &c);
558
559			cr = c.red;
560			cg = c.green;
561			cb = c.blue;
562			#endif
563			}
564
565			void
566			rxvt_color::free (rxvt_display *display)
567			{
568			#if XFT
569			XftColorFree (display->display, display->visual, display->cmap, &c);
570			#else
571			XFreeColors (display->display, display->cmap, &p, 1, AllPlanes);
572			#endif
573			}
574
575			rxvt_color
576			rxvt_color::fade (rxvt_display *display, int percent)
577			{
578	root	1.18	percent = 100 - percent;
579
580	root	1.1	unsigned short cr, cg, cb;
581			rxvt_color faded;
582
583			get (display, cr, cg, cb);
584	root	1.18
585			faded.set (
586			display,
587			cr * percent / 100,
588			cg * percent / 100,
589			cb * percent / 100
590			);
591
592			return faded;
593			}
594
595	root	1.19	#define LERP(a,b,p) (a * p + b * (100 - p)) / 100
596	root	1.18
597			rxvt_color
598			rxvt_color::fade (rxvt_display *display, int percent, rxvt_color &fadeto)
599			{
600			percent = 100 - percent;
601
602			unsigned short cr, cg, cb;
603			unsigned short fcr, fcg, fcb;
604			rxvt_color faded;
605
606			get (display, cr, cg, cb);
607			fadeto.get(display, fcr, fcg, fcb);
608
609			faded.set (
610			display,
611			LERP (cr, fcr, percent),
612			LERP (cg, fcg, percent),
613			LERP (cb, fcb, percent)
614			);
615	root	1.1
616			return faded;
617			}
618