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

const char *const xa_names[] =
  {
    "TEXT",
    "COMPOUND_TEXT",
    "UTF8_STRING",
    "MULTIPLE",
    "TARGETS",
    "TIMESTAMP",
    "VT_SELECTION",
    "INCR",
    "WM_PROTOCOLS",
    "WM_DELETE_WINDOW",
    "CLIPBOARD",
#if ENABLE_FRILLS
    "_MOTIF_WM_HINTS",
#endif
#if ENABLE_EWMH
    "_NET_WM_PID",
    "_NET_WM_NAME",
    "_NET_WM_ICON_NAME",
    "_NET_WM_PING",
#endif
#if USE_XIM
    "WM_LOCALE_NAME",
    "XIM_SERVERS",
#endif
#ifdef TRANSPARENT
    "_XROOTPMAP_ID",
    "ESETROOT_PMAP_ID",
#endif
#if ENABLE_XEMBED
    "_XEMBED",
    "_XEMBED_INFO",
#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);

  assert (sizeof (xa_names) / sizeof (char *) == NUM_XA);
  XInternAtoms (display, (char **)xa_names, NUM_XA, False, xa);

  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);

  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[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[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:	1.25
Committed:	Wed Jan 25 02:42:06 2006 UTC (18 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.24:	+43 -5 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	root	1.25	const char *const xa_names[] =
38			{
39			"TEXT",
40			"COMPOUND_TEXT",
41			"UTF8_STRING",
42			"MULTIPLE",
43			"TARGETS",
44			"TIMESTAMP",
45			"VT_SELECTION",
46			"INCR",
47			"WM_PROTOCOLS",
48			"WM_DELETE_WINDOW",
49			"CLIPBOARD",
50			#if ENABLE_FRILLS
51			"_MOTIF_WM_HINTS",
52			#endif
53			#if ENABLE_EWMH
54			"_NET_WM_PID",
55			"_NET_WM_NAME",
56			"_NET_WM_ICON_NAME",
57			"_NET_WM_PING",
58			#endif
59			#if USE_XIM
60			"WM_LOCALE_NAME",
61			"XIM_SERVERS",
62			#endif
63			#ifdef TRANSPARENT
64			"_XROOTPMAP_ID",
65			"ESETROOT_PMAP_ID",
66			#endif
67			#if ENABLE_XEMBED
68			"_XEMBED",
69			"_XEMBED_INFO",
70			#endif
71			};
72
73			/////////////////////////////////////////////////////////////////////////////
74
75	root	1.1	refcounted::refcounted (const char *id)
76			{
77	root	1.2	this->id = strdup (id);
78	root	1.1	}
79
80			refcounted::~refcounted ()
81			{
82			free (id);
83			}
84
85			template<class T>
86			T refcache<T>::get (const char id)
87			{
88			for (T **i = this->begin (); i < this->end (); ++i)
89			{
90			if (!strcmp (id, (*i)->id))
91			{
92	root	1.23	++(*i)->referenced;
93			(*i)->ref_next ();
94	root	1.1	return *i;
95			}
96			}
97
98			T *obj = new T (id);
99
100	root	1.23	if (obj && obj->ref_init ())
101	root	1.1	{
102	root	1.23	obj->referenced = 1;
103	root	1.1	this->push_back (obj);
104			return obj;
105			}
106			else
107			{
108			delete obj;
109			return 0;
110			}
111			}
112
113			template<class T>
114			void refcache<T>::put (T *obj)
115			{
116			if (!obj)
117			return;
118
119			if (!--obj->referenced)
120			{
121			this->erase (find (this->begin (), this->end (), obj));
122			delete obj;
123			}
124			}
125
126			template<class T>
127	root	1.12	void refcache<T>::clear ()
128	root	1.1	{
129			while (this->size ())
130			put (*this->begin ());
131			}
132
133			/////////////////////////////////////////////////////////////////////////////
134
135			#ifdef USE_XIM
136	root	1.24
137	root	1.1	static void
138			#if XIMCB_PROTO_BROKEN
139			im_destroy_cb (XIC unused1, XPointer client_data, XPointer unused3)
140			#else
141			im_destroy_cb (XIM unused1, XPointer client_data, XPointer unused3)
142			#endif
143			{
144			rxvt_xim xim = (rxvt_xim )client_data;
145			rxvt_display *display = xim->display;
146
147	root	1.5	xim->xim = 0;
148
149	root	1.1	display->xims.erase (find (display->xims.begin (), display->xims.end (), xim));
150			display->im_change_cb ();
151			}
152
153	root	1.23	bool
154			rxvt_xim::ref_init ()
155	root	1.1	{
156			display = GET_R->display; //HACK: TODO
157
158			xim = XOpenIM (display->display, NULL, NULL, NULL);
159
160			if (!xim)
161			return false;
162
163			XIMCallback ximcallback;
164			ximcallback.client_data = (XPointer)this;
165			ximcallback.callback = im_destroy_cb;
166
167			XSetIMValues (xim, XNDestroyCallback, &ximcallback, NULL);
168
169			return true;
170			}
171
172			rxvt_xim::~rxvt_xim ()
173			{
174			if (xim)
175			XCloseIM (xim);
176			}
177	root	1.24
178	root	1.1	#endif
179
180			/////////////////////////////////////////////////////////////////////////////
181
182			rxvt_display::rxvt_display (const char *id)
183			: refcounted (id)
184			, x_ev (this, &rxvt_display::x_cb)
185			, selection_owner (0)
186			{
187			}
188
189	root	1.23	XrmDatabase
190			rxvt_display::get_resources ()
191			{
192			char homedir = (char )getenv ("HOME");
193			char fname[1024];
194
195			/*
196			* get resources using the X library function
197			*/
198			char displayResource, xe;
199			XrmDatabase database, rdb1;
200
201			database = NULL;
202
203			// for ordering, see for example http://www.faqs.org/faqs/Xt-FAQ/ Subject: 20
204
205			// 6. System wide per application default file.
206
207			/* Add in $XAPPLRESDIR/Rxvt only; not bothering with XUSERFILESEARCHPATH */
208			if ((xe = (char *)getenv ("XAPPLRESDIR")))
209			{
210			snprintf (fname, sizeof (fname), "%s/%s", xe, RESCLASS);
211
212			if ((rdb1 = XrmGetFileDatabase (fname)))
213			XrmMergeDatabases (rdb1, &database);
214			}
215
216			// 5. User's per application default file.
217			// none
218
219			// 4. User's defaults file.
220			/* Get any Xserver defaults */
221			displayResource = XResourceManagerString (display);
222
223			if (displayResource != NULL)
224			{
225			if ((rdb1 = XrmGetStringDatabase (displayResource)))
226			XrmMergeDatabases (rdb1, &database);
227			}
228			else if (homedir)
229			{
230			snprintf (fname, sizeof (fname), "%s/.Xdefaults", homedir);
231
232			if ((rdb1 = XrmGetFileDatabase (fname)))
233			XrmMergeDatabases (rdb1, &database);
234			}
235
236			/* Get screen specific resources */
237			displayResource = XScreenResourceString (ScreenOfDisplay (display, screen));
238
239			if (displayResource != NULL)
240			{
241			if ((rdb1 = XrmGetStringDatabase (displayResource)))
242			/* Merge with screen-independent resources */
243			XrmMergeDatabases (rdb1, &database);
244
245			XFree (displayResource);
246			}
247
248			// 3. User's per host defaults file
249			/* Add in XENVIRONMENT file */
250			if ((xe = (char *)getenv ("XENVIRONMENT"))
251			&& (rdb1 = XrmGetFileDatabase (xe)))
252			XrmMergeDatabases (rdb1, &database);
253			else if (homedir)
254			{
255			struct utsname un;
256
257			if (!uname (&un))
258			{
259			snprintf (fname, sizeof (fname), "%s/.Xdefaults-%s", homedir, un.nodename);
260
261			if ((rdb1 = XrmGetFileDatabase (fname)))
262			XrmMergeDatabases (rdb1, &database);
263			}
264			}
265
266			return database;
267			}
268
269			bool rxvt_display::ref_init ()
270	root	1.1	{
271	root	1.14	#ifdef LOCAL_X_IS_UNIX
272			if (id[0] == ':')
273			{
274			val = rxvt_malloc (5 + strlen (id) + 1);
275			strcpy (val, "unix/");
276			strcat (val, id);
277			display = XOpenDisplay (val);
278			free (val);
279			}
280			else
281	root	1.15	#endif
282	root	1.14	display = 0;
283
284			if (!display)
285			display = XOpenDisplay (id);
286	root	1.1
287			if (!display)
288			return false;
289
290			screen = DefaultScreen (display);
291			root = DefaultRootWindow (display);
292			visual = DefaultVisual (display, screen);
293			cmap = DefaultColormap (display, screen);
294			depth = DefaultDepth (display, screen);
295
296	root	1.25	assert (sizeof (xa_names) / sizeof (char *) == NUM_XA);
297			XInternAtoms (display, (char **)xa_names, NUM_XA, False, xa);
298
299	root	1.23	XrmSetDatabase (display, get_resources ());
300	root	1.1
301	root	1.12	#ifdef POINTER_BLANK
302			XColor blackcolour;
303			blackcolour.red = 0;
304			blackcolour.green = 0;
305			blackcolour.blue = 0;
306			Font f = XLoadFont (display, "fixed");
307			blank_cursor = XCreateGlyphCursor (display, f, f, ' ', ' ',
308			&blackcolour, &blackcolour);
309			XUnloadFont (display, f);
310			#endif
311
312	root	1.1	#ifdef PREFER_24BIT
313			/*
314			* If depth is not 24, look for a 24bit visual.
315			*/
316			if (depth != 24)
317			{
318			XVisualInfo vinfo;
319
320			if (XMatchVisualInfo (display, screen, 24, TrueColor, &vinfo))
321			{
322			depth = 24;
323			visual = vinfo.visual;
324			cmap = XCreateColormap (display,
325			RootWindow (display, screen),
326			visual, AllocNone);
327			}
328			}
329			#endif
330
331	root	1.23	int fd = XConnectionNumber (display);
332
333			#ifndef NO_SLOW_LINK_SUPPORT
334			// try to detect wether we have a local connection.
335			// assume unix domains socket == local, everything else not
336			// TODO: might want to check for inet/127.0.0.1
337			is_local = 0;
338			sockaddr_un sa;
339			socklen_t sl = sizeof (sa);
340
341			if (!getsockname (fd, (sockaddr *)&sa, &sl))
342			is_local = sa.sun_family == AF_LOCAL;
343			#endif
344
345	root	1.1	x_ev.start (fd, EVENT_READ);
346			fcntl (fd, F_SETFD, FD_CLOEXEC);
347
348			XSelectInput (display, root, PropertyChangeMask);
349
350			flush ();
351
352			return true;
353			}
354
355	root	1.23	void
356			rxvt_display::ref_next ()
357			{
358			// TODO: somehow check wether the database files/resources changed
359			// before re-loading/parsing
360			XrmDestroyDatabase (XrmGetDatabase (display));
361			XrmSetDatabase (display, get_resources ());
362			}
363
364	root	1.1	rxvt_display::~rxvt_display ()
365			{
366	root	1.22	if (!display)
367			return;
368
369	root	1.21	#ifdef POINTER_BLANK
370			XFreeCursor (display, blank_cursor);
371			#endif
372	root	1.1	x_ev.stop ();
373	root	1.12	#ifdef USE_XIM
374			xims.clear ();
375			#endif
376	root	1.22	XCloseDisplay (display);
377	root	1.1	}
378
379			#ifdef USE_XIM
380			void rxvt_display::im_change_cb ()
381			{
382			for (im_watcher **i = imw.begin (); i != imw.end (); ++i)
383			(*i)->call ();
384			}
385	root	1.5
386			void rxvt_display::im_change_check ()
387			{
388	root	1.13	// try to only call im_change_cb when a new input method
389	root	1.5	// registers, as xlib crashes due to a race otherwise.
390			Atom actual_type, *atoms;
391			int actual_format;
392			unsigned long nitems, bytes_after;
393
394	root	1.25	if (XGetWindowProperty (display, root, xa[XA_XIM_SERVERS], 0L, 1000000L,
395	root	1.5	False, XA_ATOM, &actual_type, &actual_format,
396			&nitems, &bytes_after, (unsigned char **)&atoms)
397			!= Success )
398			return;
399
400			if (actual_type == XA_ATOM && actual_format == 32)
401			for (int i = 0; i < nitems; i++)
402			if (XGetSelectionOwner (display, atoms[i]))
403			{
404			im_change_cb ();
405			break;
406			}
407
408			XFree (atoms);
409			}
410	root	1.1	#endif
411
412			void rxvt_display::x_cb (io_watcher &w, short revents)
413			{
414			do
415			{
416			XEvent xev;
417			XNextEvent (display, &xev);
418
419	root	1.5	#ifdef USE_XIM
420			if (!XFilterEvent (&xev, None))
421			{
422			if (xev.type == PropertyNotify
423			&& xev.xany.window == root
424	root	1.25	&& xev.xproperty.atom == xa[XA_XIM_SERVERS])
425	root	1.5	im_change_check ();
426			#endif
427			for (int i = xw.size (); i--; )
428			{
429			if (!xw[i])
430			xw.erase_unordered (i);
431			else if (xw[i]->window == xev.xany.window)
432			xw[i]->call (xev);
433			}
434	root	1.1	#ifdef USE_XIM
435	root	1.5	}
436	root	1.1	#endif
437			}
438	root	1.6	while (XEventsQueued (display, QueuedAlready));
439	root	1.1
440	root	1.10	XFlush (display);
441	root	1.1	}
442
443			void rxvt_display::flush ()
444			{
445	root	1.10	if (XEventsQueued (display, QueuedAlready))
446			x_cb (x_ev, EVENT_READ);
447
448	root	1.8	XFlush (display);
449	root	1.1	}
450
451			void rxvt_display::reg (xevent_watcher *w)
452			{
453			xw.push_back (w);
454			w->active = xw.size ();
455			}
456
457			void rxvt_display::unreg (xevent_watcher *w)
458			{
459			if (w->active)
460			xw[w->active - 1] = 0;
461			}
462
463			void rxvt_display::set_selection_owner (rxvt_term *owner)
464			{
465			if (selection_owner && selection_owner != owner)
466			selection_owner->selection_clear ();
467
468			selection_owner = owner;
469			}
470
471			#ifdef USE_XIM
472			void rxvt_display::reg (im_watcher *w)
473			{
474			imw.push_back (w);
475			}
476
477			void rxvt_display::unreg (im_watcher *w)
478			{
479			imw.erase (find (imw.begin (), imw.end (), w));
480			}
481
482			rxvt_xim rxvt_display::get_xim (const char locale, const char *modifiers)
483			{
484			char *id;
485			int l, m;
486
487			l = strlen (locale);
488			m = strlen (modifiers);
489
490			if (!(id = (char *)malloc (l + m + 2)))
491			return 0;
492
493			memcpy (id, locale, l); id[l] = '\n';
494			memcpy (id + l + 1, modifiers, m); id[l + m + 1] = 0;
495
496			rxvt_xim *xim = xims.get (id);
497
498			free (id);
499
500			return xim;
501			}
502
503			void rxvt_display::put_xim (rxvt_xim *xim)
504			{
505	root	1.10	#if XLIB_IS_RACEFREE
506	root	1.1	xims.put (xim);
507	root	1.10	#endif
508	root	1.1	}
509			#endif
510
511			Atom rxvt_display::atom (const char *name)
512			{
513			return XInternAtom (display, name, False);
514			}
515
516			/////////////////////////////////////////////////////////////////////////////
517
518			template class refcache<rxvt_display>;
519			refcache<rxvt_display> displays;
520
521			/////////////////////////////////////////////////////////////////////////////
522
523			bool
524			rxvt_color::set (rxvt_display *display, Pixel p)
525			{
526			#if XFT
527			XColor xc;
528
529			xc.pixel = p;
530			if (!XQueryColor (display->display, display->cmap, &xc))
531			return false;
532
533			XRenderColor d;
534
535			d.red = xc.red;
536			d.green = xc.green;
537			d.blue = xc.blue;
538			d.alpha = 0xffff;
539
540			return
541			XftColorAllocValue (display->display,
542			display->visual,
543			display->cmap,
544			&d, &c);
545			#else
546			this->p = p;
547			#endif
548
549			return true;
550			}
551
552			bool
553			rxvt_color::set (rxvt_display display, const char name)
554			{
555	root	1.7	#if XFT
556			return XftColorAllocName (display->display, display->visual, display->cmap,
557			name, &c);
558			#else
559	root	1.1	XColor xc;
560
561			if (XParseColor (display->display, display->cmap, name, &xc))
562			return set (display, xc.red, xc.green, xc.blue);
563
564			return false;
565	root	1.7	#endif
566	root	1.1	}
567
568			bool
569			rxvt_color::set (rxvt_display *display, unsigned short cr, unsigned short cg, unsigned short cb)
570			{
571			XColor xc;
572
573			xc.red = cr;
574			xc.green = cg;
575			xc.blue = cb;
576			xc.flags = DoRed \| DoGreen \| DoBlue;
577
578			if (XAllocColor (display->display, display->cmap, &xc))
579			return set (display, xc.pixel);
580
581			return false;
582			}
583
584			void
585			rxvt_color::get (rxvt_display *display, unsigned short &cr, unsigned short &cg, unsigned short &cb)
586			{
587			#if XFT
588			cr = c.color.red;
589			cg = c.color.green;
590			cb = c.color.blue;
591			#else
592			XColor c;
593
594			c.pixel = p;
595			XQueryColor (display->display, display->cmap, &c);
596
597			cr = c.red;
598			cg = c.green;
599			cb = c.blue;
600			#endif
601			}
602
603			void
604			rxvt_color::free (rxvt_display *display)
605			{
606			#if XFT
607			XftColorFree (display->display, display->visual, display->cmap, &c);
608			#else
609			XFreeColors (display->display, display->cmap, &p, 1, AllPlanes);
610			#endif
611			}
612
613			rxvt_color
614			rxvt_color::fade (rxvt_display *display, int percent)
615			{
616	root	1.18	percent = 100 - percent;
617
618	root	1.1	unsigned short cr, cg, cb;
619			rxvt_color faded;
620
621			get (display, cr, cg, cb);
622	root	1.18
623			faded.set (
624			display,
625			cr * percent / 100,
626			cg * percent / 100,
627			cb * percent / 100
628			);
629
630			return faded;
631			}
632
633	root	1.19	#define LERP(a,b,p) (a * p + b * (100 - p)) / 100
634	root	1.18
635			rxvt_color
636			rxvt_color::fade (rxvt_display *display, int percent, rxvt_color &fadeto)
637			{
638			percent = 100 - percent;
639
640			unsigned short cr, cg, cb;
641			unsigned short fcr, fcg, fcb;
642			rxvt_color faded;
643
644			get (display, cr, cg, cb);
645			fadeto.get(display, fcr, fcg, fcb);
646
647			faded.set (
648			display,
649			LERP (cr, fcr, percent),
650			LERP (cg, fcg, percent),
651			LERP (cb, fcb, percent)
652			);
653	root	1.1
654			return faded;
655			}
656