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:	1.23
Committed:	Wed Jan 11 00:59:58 2006 UTC (18 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-7_2, rel-7_1, rel-7_0
Changes since 1.22:	+113 -19 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			static void
99			#if XIMCB_PROTO_BROKEN
100			im_destroy_cb (XIC unused1, XPointer client_data, XPointer unused3)
101			#else
102			im_destroy_cb (XIM unused1, XPointer client_data, XPointer unused3)
103			#endif
104			{
105			rxvt_xim xim = (rxvt_xim )client_data;
106			rxvt_display *display = xim->display;
107
108	root	1.5	xim->xim = 0;
109
110	root	1.1	display->xims.erase (find (display->xims.begin (), display->xims.end (), xim));
111			display->im_change_cb ();
112			}
113
114	root	1.23	bool
115			rxvt_xim::ref_init ()
116	root	1.1	{
117			display = GET_R->display; //HACK: TODO
118
119			xim = XOpenIM (display->display, NULL, NULL, NULL);
120
121			if (!xim)
122			return false;
123
124			XIMCallback ximcallback;
125			ximcallback.client_data = (XPointer)this;
126			ximcallback.callback = im_destroy_cb;
127
128			XSetIMValues (xim, XNDestroyCallback, &ximcallback, NULL);
129
130			return true;
131			}
132
133			rxvt_xim::~rxvt_xim ()
134			{
135			if (xim)
136			XCloseIM (xim);
137			}
138			#endif
139
140			/////////////////////////////////////////////////////////////////////////////
141
142			rxvt_display::rxvt_display (const char *id)
143			: refcounted (id)
144			, x_ev (this, &rxvt_display::x_cb)
145			, selection_owner (0)
146			{
147			}
148
149	root	1.23	XrmDatabase
150			rxvt_display::get_resources ()
151			{
152			char homedir = (char )getenv ("HOME");
153			char fname[1024];
154
155			/*
156			* get resources using the X library function
157			*/
158			char displayResource, xe;
159			XrmDatabase database, rdb1;
160
161			database = NULL;
162
163			// for ordering, see for example http://www.faqs.org/faqs/Xt-FAQ/ Subject: 20
164
165			// 6. System wide per application default file.
166
167			/* Add in $XAPPLRESDIR/Rxvt only; not bothering with XUSERFILESEARCHPATH */
168			if ((xe = (char *)getenv ("XAPPLRESDIR")))
169			{
170			snprintf (fname, sizeof (fname), "%s/%s", xe, RESCLASS);
171
172			if ((rdb1 = XrmGetFileDatabase (fname)))
173			XrmMergeDatabases (rdb1, &database);
174			}
175
176			// 5. User's per application default file.
177			// none
178
179			// 4. User's defaults file.
180			/* Get any Xserver defaults */
181			displayResource = XResourceManagerString (display);
182
183			if (displayResource != NULL)
184			{
185			if ((rdb1 = XrmGetStringDatabase (displayResource)))
186			XrmMergeDatabases (rdb1, &database);
187			}
188			else if (homedir)
189			{
190			snprintf (fname, sizeof (fname), "%s/.Xdefaults", homedir);
191
192			if ((rdb1 = XrmGetFileDatabase (fname)))
193			XrmMergeDatabases (rdb1, &database);
194			}
195
196			/* Get screen specific resources */
197			displayResource = XScreenResourceString (ScreenOfDisplay (display, screen));
198
199			if (displayResource != NULL)
200			{
201			if ((rdb1 = XrmGetStringDatabase (displayResource)))
202			/* Merge with screen-independent resources */
203			XrmMergeDatabases (rdb1, &database);
204
205			XFree (displayResource);
206			}
207
208			// 3. User's per host defaults file
209			/* Add in XENVIRONMENT file */
210			if ((xe = (char *)getenv ("XENVIRONMENT"))
211			&& (rdb1 = XrmGetFileDatabase (xe)))
212			XrmMergeDatabases (rdb1, &database);
213			else if (homedir)
214			{
215			struct utsname un;
216
217			if (!uname (&un))
218			{
219			snprintf (fname, sizeof (fname), "%s/.Xdefaults-%s", homedir, un.nodename);
220
221			if ((rdb1 = XrmGetFileDatabase (fname)))
222			XrmMergeDatabases (rdb1, &database);
223			}
224			}
225
226			return database;
227			}
228
229			bool rxvt_display::ref_init ()
230	root	1.1	{
231	root	1.14	#ifdef LOCAL_X_IS_UNIX
232			if (id[0] == ':')
233			{
234			val = rxvt_malloc (5 + strlen (id) + 1);
235			strcpy (val, "unix/");
236			strcat (val, id);
237			display = XOpenDisplay (val);
238			free (val);
239			}
240			else
241	root	1.15	#endif
242	root	1.14	display = 0;
243
244			if (!display)
245			display = XOpenDisplay (id);
246	root	1.1
247			if (!display)
248			return false;
249
250			screen = DefaultScreen (display);
251			root = DefaultRootWindow (display);
252			visual = DefaultVisual (display, screen);
253			cmap = DefaultColormap (display, screen);
254			depth = DefaultDepth (display, screen);
255
256	root	1.23	XrmSetDatabase (display, get_resources ());
257	root	1.1
258	root	1.12	#ifdef POINTER_BLANK
259			XColor blackcolour;
260			blackcolour.red = 0;
261			blackcolour.green = 0;
262			blackcolour.blue = 0;
263			Font f = XLoadFont (display, "fixed");
264			blank_cursor = XCreateGlyphCursor (display, f, f, ' ', ' ',
265			&blackcolour, &blackcolour);
266			XUnloadFont (display, f);
267			#endif
268
269	root	1.1	#ifdef PREFER_24BIT
270			/*
271			* If depth is not 24, look for a 24bit visual.
272			*/
273			if (depth != 24)
274			{
275			XVisualInfo vinfo;
276
277			if (XMatchVisualInfo (display, screen, 24, TrueColor, &vinfo))
278			{
279			depth = 24;
280			visual = vinfo.visual;
281			cmap = XCreateColormap (display,
282			RootWindow (display, screen),
283			visual, AllocNone);
284			}
285			}
286			#endif
287
288	root	1.23	int fd = XConnectionNumber (display);
289
290			#ifndef NO_SLOW_LINK_SUPPORT
291			// try to detect wether we have a local connection.
292			// assume unix domains socket == local, everything else not
293			// TODO: might want to check for inet/127.0.0.1
294			is_local = 0;
295			sockaddr_un sa;
296			socklen_t sl = sizeof (sa);
297
298			if (!getsockname (fd, (sockaddr *)&sa, &sl))
299			is_local = sa.sun_family == AF_LOCAL;
300			#endif
301
302	root	1.1	x_ev.start (fd, EVENT_READ);
303			fcntl (fd, F_SETFD, FD_CLOEXEC);
304
305			XSelectInput (display, root, PropertyChangeMask);
306			#ifdef USE_XIM
307			xa_xim_servers = XInternAtom (display, "XIM_SERVERS", 0);
308			#endif
309
310			flush ();
311
312			return true;
313			}
314
315	root	1.23	void
316			rxvt_display::ref_next ()
317			{
318			// TODO: somehow check wether the database files/resources changed
319			// before re-loading/parsing
320			XrmDestroyDatabase (XrmGetDatabase (display));
321			XrmSetDatabase (display, get_resources ());
322			}
323
324	root	1.1	rxvt_display::~rxvt_display ()
325			{
326	root	1.22	if (!display)
327			return;
328
329	root	1.21	#ifdef POINTER_BLANK
330			XFreeCursor (display, blank_cursor);
331			#endif
332	root	1.1	x_ev.stop ();
333	root	1.12	#ifdef USE_XIM
334			xims.clear ();
335			#endif
336	root	1.22	XCloseDisplay (display);
337	root	1.1	}
338
339			#ifdef USE_XIM
340			void rxvt_display::im_change_cb ()
341			{
342			for (im_watcher **i = imw.begin (); i != imw.end (); ++i)
343			(*i)->call ();
344			}
345	root	1.5
346			void rxvt_display::im_change_check ()
347			{
348	root	1.13	// try to only call im_change_cb when a new input method
349	root	1.5	// registers, as xlib crashes due to a race otherwise.
350			Atom actual_type, *atoms;
351			int actual_format;
352			unsigned long nitems, bytes_after;
353
354			if (XGetWindowProperty (display, root, xa_xim_servers, 0L, 1000000L,
355			False, XA_ATOM, &actual_type, &actual_format,
356			&nitems, &bytes_after, (unsigned char **)&atoms)
357			!= Success )
358			return;
359
360			if (actual_type == XA_ATOM && actual_format == 32)
361			for (int i = 0; i < nitems; i++)
362			if (XGetSelectionOwner (display, atoms[i]))
363			{
364			im_change_cb ();
365			break;
366			}
367
368			XFree (atoms);
369			}
370	root	1.1	#endif
371
372			void rxvt_display::x_cb (io_watcher &w, short revents)
373			{
374			do
375			{
376			XEvent xev;
377			XNextEvent (display, &xev);
378
379	root	1.5	#ifdef USE_XIM
380			if (!XFilterEvent (&xev, None))
381			{
382			if (xev.type == PropertyNotify
383			&& xev.xany.window == root
384			&& xev.xproperty.atom == xa_xim_servers)
385			im_change_check ();
386			#endif
387			for (int i = xw.size (); i--; )
388			{
389			if (!xw[i])
390			xw.erase_unordered (i);
391			else if (xw[i]->window == xev.xany.window)
392			xw[i]->call (xev);
393			}
394	root	1.1	#ifdef USE_XIM
395	root	1.5	}
396	root	1.1	#endif
397			}
398	root	1.6	while (XEventsQueued (display, QueuedAlready));
399	root	1.1
400	root	1.10	XFlush (display);
401	root	1.1	}
402
403			void rxvt_display::flush ()
404			{
405	root	1.10	if (XEventsQueued (display, QueuedAlready))
406			x_cb (x_ev, EVENT_READ);
407
408	root	1.8	XFlush (display);
409	root	1.1	}
410
411			void rxvt_display::reg (xevent_watcher *w)
412			{
413			xw.push_back (w);
414			w->active = xw.size ();
415			}
416
417			void rxvt_display::unreg (xevent_watcher *w)
418			{
419			if (w->active)
420			xw[w->active - 1] = 0;
421			}
422
423			void rxvt_display::set_selection_owner (rxvt_term *owner)
424			{
425			if (selection_owner && selection_owner != owner)
426			selection_owner->selection_clear ();
427
428			selection_owner = owner;
429			}
430
431			#ifdef USE_XIM
432			void rxvt_display::reg (im_watcher *w)
433			{
434			imw.push_back (w);
435			}
436
437			void rxvt_display::unreg (im_watcher *w)
438			{
439			imw.erase (find (imw.begin (), imw.end (), w));
440			}
441
442			rxvt_xim rxvt_display::get_xim (const char locale, const char *modifiers)
443			{
444			char *id;
445			int l, m;
446
447			l = strlen (locale);
448			m = strlen (modifiers);
449
450			if (!(id = (char *)malloc (l + m + 2)))
451			return 0;
452
453			memcpy (id, locale, l); id[l] = '\n';
454			memcpy (id + l + 1, modifiers, m); id[l + m + 1] = 0;
455
456			rxvt_xim *xim = xims.get (id);
457
458			free (id);
459
460			return xim;
461			}
462
463			void rxvt_display::put_xim (rxvt_xim *xim)
464			{
465	root	1.10	#if XLIB_IS_RACEFREE
466	root	1.1	xims.put (xim);
467	root	1.10	#endif
468	root	1.1	}
469			#endif
470
471			Atom rxvt_display::atom (const char *name)
472			{
473			return XInternAtom (display, name, False);
474			}
475
476			/////////////////////////////////////////////////////////////////////////////
477
478			template class refcache<rxvt_display>;
479			refcache<rxvt_display> displays;
480
481			/////////////////////////////////////////////////////////////////////////////
482
483			bool
484			rxvt_color::set (rxvt_display *display, Pixel p)
485			{
486			#if XFT
487			XColor xc;
488
489			xc.pixel = p;
490			if (!XQueryColor (display->display, display->cmap, &xc))
491			return false;
492
493			XRenderColor d;
494
495			d.red = xc.red;
496			d.green = xc.green;
497			d.blue = xc.blue;
498			d.alpha = 0xffff;
499
500			return
501			XftColorAllocValue (display->display,
502			display->visual,
503			display->cmap,
504			&d, &c);
505			#else
506			this->p = p;
507			#endif
508
509			return true;
510			}
511
512			bool
513			rxvt_color::set (rxvt_display display, const char name)
514			{
515	root	1.7	#if XFT
516			return XftColorAllocName (display->display, display->visual, display->cmap,
517			name, &c);
518			#else
519	root	1.1	XColor xc;
520
521			if (XParseColor (display->display, display->cmap, name, &xc))
522			return set (display, xc.red, xc.green, xc.blue);
523
524			return false;
525	root	1.7	#endif
526	root	1.1	}
527
528			bool
529			rxvt_color::set (rxvt_display *display, unsigned short cr, unsigned short cg, unsigned short cb)
530			{
531			XColor xc;
532
533			xc.red = cr;
534			xc.green = cg;
535			xc.blue = cb;
536			xc.flags = DoRed \| DoGreen \| DoBlue;
537
538			if (XAllocColor (display->display, display->cmap, &xc))
539			return set (display, xc.pixel);
540
541			return false;
542			}
543
544			void
545			rxvt_color::get (rxvt_display *display, unsigned short &cr, unsigned short &cg, unsigned short &cb)
546			{
547			#if XFT
548			cr = c.color.red;
549			cg = c.color.green;
550			cb = c.color.blue;
551			#else
552			XColor c;
553
554			c.pixel = p;
555			XQueryColor (display->display, display->cmap, &c);
556
557			cr = c.red;
558			cg = c.green;
559			cb = c.blue;
560			#endif
561			}
562
563			void
564			rxvt_color::free (rxvt_display *display)
565			{
566			#if XFT
567			XftColorFree (display->display, display->visual, display->cmap, &c);
568			#else
569			XFreeColors (display->display, display->cmap, &p, 1, AllPlanes);
570			#endif
571			}
572
573			rxvt_color
574			rxvt_color::fade (rxvt_display *display, int percent)
575			{
576	root	1.18	percent = 100 - percent;
577
578	root	1.1	unsigned short cr, cg, cb;
579			rxvt_color faded;
580
581			get (display, cr, cg, cb);
582	root	1.18
583			faded.set (
584			display,
585			cr * percent / 100,
586			cg * percent / 100,
587			cb * percent / 100
588			);
589
590			return faded;
591			}
592
593	root	1.19	#define LERP(a,b,p) (a * p + b * (100 - p)) / 100
594	root	1.18
595			rxvt_color
596			rxvt_color::fade (rxvt_display *display, int percent, rxvt_color &fadeto)
597			{
598			percent = 100 - percent;
599
600			unsigned short cr, cg, cb;
601			unsigned short fcr, fcg, fcb;
602			rxvt_color faded;
603
604			get (display, cr, cg, cb);
605			fadeto.get(display, fcr, fcg, fcb);
606
607			faded.set (
608			display,
609			LERP (cr, fcr, percent),
610			LERP (cg, fcg, percent),
611			LERP (cb, fcb, percent)
612			);
613	root	1.1
614			return faded;
615			}
616