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

#if XFT
# include <X11/extensions/Xrender.h>
#endif

const char *const xa_names[] =
{
  "TEXT",
  "COMPOUND_TEXT",
  "UTF8_STRING",
  "MULTIPLE",
  "TARGETS",
  "TIMESTAMP",
  "VT_SELECTION",
  "INCR",
  "WM_PROTOCOLS",
  "WM_DELETE_WINDOW",
  "CLIPBOARD",
  "AVERAGE_WIDTH",
  "WEIGHT_NAME",
  "SLANT",
  "CHARSET_REGISTRY",
  "CHARSET_ENCODING",
#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
#if !ENABLE_MINIMAL
  "SCREEN_RESOURCES",
  "XDCCC_LINEAR_RGB_CORRECTION",
  "XDCCC_LINEAR_RGB_MATRICES",
  "WM_COLORMAP_WINDOWS",
  "WM_STATE",
  "cursor",
# if USE_XIM
  "TRANSPORT",
  "LOCALES",
  "_XIM_PROTOCOL",
  "_XIM_XCONNECT",
  "_XIM_MOREDATA",
# endif
#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

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

void
rxvt_screen::set (rxvt_display *disp)
{
  display = disp;
  xdisp   = disp->display;

  Screen *screen = ScreenOfDisplay (xdisp, disp->screen);

  depth   = DefaultDepthOfScreen    (screen);
  visual  = DefaultVisualOfScreen   (screen);
  cmap    = DefaultColormapOfScreen (screen);
}

void
rxvt_screen::set (rxvt_display *disp, int bitdepth)
{
  set (disp);

#if XFT
  XVisualInfo vinfo;

  if (XMatchVisualInfo (xdisp, display->screen, bitdepth, TrueColor, &vinfo))
    {
      depth  = bitdepth;
      visual = vinfo.visual;
      cmap   = XCreateColormap (xdisp, disp->root, visual, AllocNone);
    }
#endif
}

void
rxvt_screen::clear ()
{
  if (cmap != DefaultColormapOfScreen (ScreenOfDisplay (xdisp, display->screen)))
    XFreeColormap (xdisp, cmap);
}

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

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);

  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

  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 affording 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::alloc (rxvt_screen *screen, const rgba &color)
{
#if XFT
  XRenderPictFormat *format;

  // FUCKING Xft gets it wrong, of course, so work around it.
  // Transparency users should eat shit and die, and then
  // XRenderQueryPictIndexValues themselves plenty.
  if ((screen->visual->c_class == TrueColor)
      && (format = XRenderFindVisualFormat (screen->xdisp, screen->visual)))
    {
      // the fun lies in doing everything manually...
      c.color.red   = color.r;
      c.color.green = color.g;
      c.color.blue  = color.b;
      c.color.alpha = color.a;

      c.pixel = ((color.r * format->direct.redMask   / rgba::MAX_CC) << format->direct.red  )
              | ((color.g * format->direct.greenMask / rgba::MAX_CC) << format->direct.green)
              | ((color.b * format->direct.blueMask  / rgba::MAX_CC) << format->direct.blue )
              | ((color.a * format->direct.alphaMask / rgba::MAX_CC) << format->direct.alpha);

      return true;
    }
  else
    {
      XRenderColor d;

      d.red   = color.r;
      d.green = color.g;
      d.blue  = color.b;
      d.alpha = color.a;

      return XftColorAllocValue (screen->xdisp, screen->visual, screen->cmap, &d, &c);
    }
#else
  c.red   = color.r;
  c.green = color.g;
  c.blue  = color.b;

  if (screen->visual->c_class == TrueColor)
    {
      c.pixel = (color.r * (screen->visual->red_mask   >> ctz (screen->visual->red_mask  ))
                         / rgba::MAX_CC) << ctz (screen->visual->red_mask  )
              | (color.g * (screen->visual->green_mask >> ctz (screen->visual->green_mask))
                         / rgba::MAX_CC) << ctz (screen->visual->green_mask)
              | (color.b * (screen->visual->blue_mask  >> ctz (screen->visual->blue_mask ))
                         / rgba::MAX_CC) << ctz (screen->visual->blue_mask );

      return true;
    }
  else if (XAllocColor (screen->xdisp, screen->cmap, &c))
    return true;
  else
    c.pixel = (color.r + color.g + color.b) > 128*3
            ? WhitePixelOfScreen (DefaultScreenOfDisplay (screen->xdisp))
            : BlackPixelOfScreen (DefaultScreenOfDisplay (screen->xdisp));
#endif

  return false;
}

bool
rxvt_color::set (rxvt_screen *screen, const char *name)
{
  rgba c;
  char eos;
  int skip;

  // parse the nonstandard "[alphapercent]" prefix
  if (1 <= sscanf (name, "[%hd]%n", &c.a, &skip))
    {
      c.a = lerp<int, int, int> (0, rgba::MAX_CC, c.a);
      name += skip;
    }
  else
    c.a = rgba::MAX_CC;

  // parse the non-standard "rgba:rrrr/gggg/bbbb/aaaa" format
  if (strlen (name) != 4+5*4 || 4 != sscanf (name, "rgba:%4hx/%4hx/%4hx/%4hx%c", &c.r, &c.g, &c.b, &c.a, &eos))
    {
      XColor xc, xc_exact;

      if (XParseColor (screen->xdisp, screen->cmap, name, &xc))
        {
          c.r = xc.red;
          c.g = xc.green;
          c.b = xc.blue;
        }
      else
        {
          c.r = 0xffff;
          c.g = 0x6969;
          c.b = 0xb4b4;

          rxvt_warn ("unable to parse color '%s', using pink instead.\n", name);
        }
    }

  return set (screen, c);
}

bool
rxvt_color::set (rxvt_screen *screen, const rgba &color)
{
  bool got = alloc (screen, color);

#if !ENABLE_MINIMAL
  int cmap_size = screen->visual->map_entries;

  if (!got
      && screen->visual->c_class == PseudoColor
      && cmap_size < 4096)
    {
      XColor *colors = new XColor [screen->visual->map_entries];

      for (int i = 0; i < cmap_size; i++)
        colors [i].pixel = i;
 
      // many kilobytes transfer per colour, but pseudocolor isn't worth
      // many extra optimisations.
      XQueryColors (screen->xdisp, screen->cmap, colors, cmap_size);

      int diff = 0x7fffffffUL;
      XColor *best = colors;

      for (int i = 0; i < cmap_size; i++)
        {
          int d = (squared_diff<int> (color.r >> 2, colors [i].red   >> 2))
                + (squared_diff<int> (color.g >> 2, colors [i].green >> 2))
                + (squared_diff<int> (color.b >> 2, colors [i].blue  >> 2));

          if (d < diff)
            {
              diff = d;
              best = colors + i;
            }
        }

      //rxvt_warn ("could not allocate %04x %04x %04x, getting %04x %04x %04x instead (%d)\n",
      //    color.r, color.g, color.b, best->red, best->green, best->blue, diff);
          
      got = alloc (screen, rgba (best->red, best->green, best->blue));

      delete colors;
    }
#endif

  return got;
}

void
rxvt_color::get (rgba &color)
{
#if XFT
  color.r = c.color.red;
  color.g = c.color.green;
  color.b = c.color.blue;
  color.a = c.color.alpha;
#else
  color.r = c.red;
  color.g = c.green;
  color.b = c.blue;
  color.a = rgba::MAX_CC;
#endif
}

void
rxvt_color::get (XColor &color)
{
  rgba c;
  get (c);

  color.red   = c.r;
  color.green = c.g;
  color.blue  = c.b;
  color.pixel = (Pixel)*this;
}

void 
rxvt_color::free (rxvt_screen *screen)
{
#if XFT
  XftColorFree (screen->xdisp, screen->visual, screen->cmap, &c);
#else
  XFreeColors (screen->xdisp, screen->cmap, &c.pixel, 1, AllPlanes);
#endif
}

void
rxvt_color::fade (rxvt_screen *screen, int percent, rxvt_color &result, const rgba &to)
{
  rgba c;
  get (c);

  result.set (
    screen,
    rgba (
      lerp (c.r, to.r, percent),
      lerp (c.g, to.g, percent),
      lerp (c.b, to.b, percent),
      lerp (c.a, to.a, percent)
    )
  );
}

Revision:	1.48
Committed:	Thu Feb 2 12:51:22 2006 UTC (18 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.47:	+4 -4 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	1.31	#if XFT
38			# include <X11/extensions/Xrender.h>
39			#endif
40
41	root	1.25	const char *const xa_names[] =
42	root	1.34	{
43			"TEXT",
44			"COMPOUND_TEXT",
45			"UTF8_STRING",
46			"MULTIPLE",
47			"TARGETS",
48			"TIMESTAMP",
49			"VT_SELECTION",
50			"INCR",
51			"WM_PROTOCOLS",
52			"WM_DELETE_WINDOW",
53			"CLIPBOARD",
54			"AVERAGE_WIDTH",
55			"WEIGHT_NAME",
56			"SLANT",
57			"CHARSET_REGISTRY",
58			"CHARSET_ENCODING",
59	root	1.25	#if ENABLE_FRILLS
60	root	1.34	"_MOTIF_WM_HINTS",
61	root	1.25	#endif
62			#if ENABLE_EWMH
63	root	1.34	"_NET_WM_PID",
64			"_NET_WM_NAME",
65			"_NET_WM_ICON_NAME",
66			"_NET_WM_PING",
67	root	1.25	#endif
68			#if USE_XIM
69	root	1.34	"WM_LOCALE_NAME",
70			"XIM_SERVERS",
71	root	1.25	#endif
72			#ifdef TRANSPARENT
73	root	1.34	"_XROOTPMAP_ID",
74			"ESETROOT_PMAP_ID",
75	root	1.25	#endif
76			#if ENABLE_XEMBED
77	root	1.34	"_XEMBED",
78			"_XEMBED_INFO",
79			#endif
80			#if !ENABLE_MINIMAL
81			"SCREEN_RESOURCES",
82			"XDCCC_LINEAR_RGB_CORRECTION",
83			"XDCCC_LINEAR_RGB_MATRICES",
84			"WM_COLORMAP_WINDOWS",
85			"WM_STATE",
86	root	1.38	"cursor",
87			# if USE_XIM
88			"TRANSPORT",
89			"LOCALES",
90			"_XIM_PROTOCOL",
91			"_XIM_XCONNECT",
92			"_XIM_MOREDATA",
93			# endif
94	root	1.25	#endif
95	root	1.34	};
96	root	1.25
97			/////////////////////////////////////////////////////////////////////////////
98
99	root	1.1	refcounted::refcounted (const char *id)
100			{
101	root	1.2	this->id = strdup (id);
102	root	1.1	}
103
104			refcounted::~refcounted ()
105			{
106			free (id);
107			}
108
109			template<class T>
110			T refcache<T>::get (const char id)
111			{
112			for (T **i = this->begin (); i < this->end (); ++i)
113			{
114			if (!strcmp (id, (*i)->id))
115			{
116	root	1.23	++(*i)->referenced;
117			(*i)->ref_next ();
118	root	1.1	return *i;
119			}
120			}
121
122			T *obj = new T (id);
123
124	root	1.23	if (obj && obj->ref_init ())
125	root	1.1	{
126	root	1.23	obj->referenced = 1;
127	root	1.1	this->push_back (obj);
128			return obj;
129			}
130			else
131			{
132			delete obj;
133			return 0;
134			}
135			}
136
137			template<class T>
138			void refcache<T>::put (T *obj)
139			{
140			if (!obj)
141			return;
142
143			if (!--obj->referenced)
144			{
145			this->erase (find (this->begin (), this->end (), obj));
146			delete obj;
147			}
148			}
149
150			template<class T>
151	root	1.12	void refcache<T>::clear ()
152	root	1.1	{
153			while (this->size ())
154			put (*this->begin ());
155			}
156
157			/////////////////////////////////////////////////////////////////////////////
158
159			#ifdef USE_XIM
160	root	1.24
161	root	1.1	static void
162			#if XIMCB_PROTO_BROKEN
163			im_destroy_cb (XIC unused1, XPointer client_data, XPointer unused3)
164			#else
165			im_destroy_cb (XIM unused1, XPointer client_data, XPointer unused3)
166			#endif
167			{
168			rxvt_xim xim = (rxvt_xim )client_data;
169			rxvt_display *display = xim->display;
170
171	root	1.5	xim->xim = 0;
172
173	root	1.1	display->xims.erase (find (display->xims.begin (), display->xims.end (), xim));
174			display->im_change_cb ();
175			}
176
177	root	1.23	bool
178			rxvt_xim::ref_init ()
179	root	1.1	{
180			display = GET_R->display; //HACK: TODO
181
182			xim = XOpenIM (display->display, NULL, NULL, NULL);
183
184			if (!xim)
185			return false;
186
187			XIMCallback ximcallback;
188			ximcallback.client_data = (XPointer)this;
189			ximcallback.callback = im_destroy_cb;
190
191			XSetIMValues (xim, XNDestroyCallback, &ximcallback, NULL);
192
193			return true;
194			}
195
196			rxvt_xim::~rxvt_xim ()
197			{
198			if (xim)
199			XCloseIM (xim);
200			}
201	root	1.24
202	root	1.1	#endif
203
204			/////////////////////////////////////////////////////////////////////////////
205
206	root	1.26	void
207			rxvt_screen::set (rxvt_display *disp)
208			{
209			display = disp;
210	root	1.27	xdisp = disp->display;
211	root	1.26
212			Screen *screen = ScreenOfDisplay (xdisp, disp->screen);
213
214	root	1.27	depth = DefaultDepthOfScreen (screen);
215			visual = DefaultVisualOfScreen (screen);
216			cmap = DefaultColormapOfScreen (screen);
217	root	1.26	}
218
219			void
220	root	1.28	rxvt_screen::set (rxvt_display *disp, int bitdepth)
221	root	1.26	{
222			set (disp);
223
224	root	1.31	#if XFT
225	root	1.26	XVisualInfo vinfo;
226
227	root	1.28	if (XMatchVisualInfo (xdisp, display->screen, bitdepth, TrueColor, &vinfo))
228	root	1.26	{
229	root	1.28	depth = bitdepth;
230			visual = vinfo.visual;
231			cmap = XCreateColormap (xdisp, disp->root, visual, AllocNone);
232	root	1.26	}
233	root	1.31	#endif
234	root	1.26	}
235
236			void
237			rxvt_screen::clear ()
238			{
239			if (cmap != DefaultColormapOfScreen (ScreenOfDisplay (xdisp, display->screen)))
240			XFreeColormap (xdisp, cmap);
241			}
242
243			/////////////////////////////////////////////////////////////////////////////
244
245	root	1.1	rxvt_display::rxvt_display (const char *id)
246			: refcounted (id)
247			, x_ev (this, &rxvt_display::x_cb)
248			, selection_owner (0)
249			{
250			}
251
252	root	1.23	XrmDatabase
253			rxvt_display::get_resources ()
254			{
255			char homedir = (char )getenv ("HOME");
256			char fname[1024];
257
258			/*
259			* get resources using the X library function
260			*/
261			char displayResource, xe;
262			XrmDatabase database, rdb1;
263
264			database = NULL;
265
266			// for ordering, see for example http://www.faqs.org/faqs/Xt-FAQ/ Subject: 20
267
268			// 6. System wide per application default file.
269
270			/* Add in $XAPPLRESDIR/Rxvt only; not bothering with XUSERFILESEARCHPATH */
271			if ((xe = (char *)getenv ("XAPPLRESDIR")))
272			{
273			snprintf (fname, sizeof (fname), "%s/%s", xe, RESCLASS);
274
275			if ((rdb1 = XrmGetFileDatabase (fname)))
276			XrmMergeDatabases (rdb1, &database);
277			}
278
279			// 5. User's per application default file.
280			// none
281
282			// 4. User's defaults file.
283			/* Get any Xserver defaults */
284			displayResource = XResourceManagerString (display);
285
286			if (displayResource != NULL)
287			{
288			if ((rdb1 = XrmGetStringDatabase (displayResource)))
289			XrmMergeDatabases (rdb1, &database);
290			}
291			else if (homedir)
292			{
293			snprintf (fname, sizeof (fname), "%s/.Xdefaults", homedir);
294
295			if ((rdb1 = XrmGetFileDatabase (fname)))
296			XrmMergeDatabases (rdb1, &database);
297			}
298
299			/* Get screen specific resources */
300			displayResource = XScreenResourceString (ScreenOfDisplay (display, screen));
301
302			if (displayResource != NULL)
303			{
304			if ((rdb1 = XrmGetStringDatabase (displayResource)))
305			/* Merge with screen-independent resources */
306			XrmMergeDatabases (rdb1, &database);
307
308			XFree (displayResource);
309			}
310
311			// 3. User's per host defaults file
312			/* Add in XENVIRONMENT file */
313			if ((xe = (char *)getenv ("XENVIRONMENT"))
314			&& (rdb1 = XrmGetFileDatabase (xe)))
315			XrmMergeDatabases (rdb1, &database);
316			else if (homedir)
317			{
318			struct utsname un;
319
320			if (!uname (&un))
321			{
322			snprintf (fname, sizeof (fname), "%s/.Xdefaults-%s", homedir, un.nodename);
323
324			if ((rdb1 = XrmGetFileDatabase (fname)))
325			XrmMergeDatabases (rdb1, &database);
326			}
327			}
328
329			return database;
330			}
331
332			bool rxvt_display::ref_init ()
333	root	1.1	{
334	root	1.14	#ifdef LOCAL_X_IS_UNIX
335			if (id[0] == ':')
336			{
337			val = rxvt_malloc (5 + strlen (id) + 1);
338			strcpy (val, "unix/");
339			strcat (val, id);
340			display = XOpenDisplay (val);
341			free (val);
342			}
343			else
344	root	1.15	#endif
345	root	1.14	display = 0;
346
347			if (!display)
348			display = XOpenDisplay (id);
349	root	1.1
350			if (!display)
351			return false;
352
353			screen = DefaultScreen (display);
354			root = DefaultRootWindow (display);
355
356	root	1.25	assert (sizeof (xa_names) / sizeof (char *) == NUM_XA);
357			XInternAtoms (display, (char **)xa_names, NUM_XA, False, xa);
358
359	root	1.23	XrmSetDatabase (display, get_resources ());
360	root	1.1
361	root	1.12	#ifdef POINTER_BLANK
362			XColor blackcolour;
363			blackcolour.red = 0;
364			blackcolour.green = 0;
365			blackcolour.blue = 0;
366			Font f = XLoadFont (display, "fixed");
367			blank_cursor = XCreateGlyphCursor (display, f, f, ' ', ' ',
368			&blackcolour, &blackcolour);
369			XUnloadFont (display, f);
370			#endif
371
372	root	1.23	int fd = XConnectionNumber (display);
373
374			#ifndef NO_SLOW_LINK_SUPPORT
375			// try to detect wether we have a local connection.
376			// assume unix domains socket == local, everything else not
377			// TODO: might want to check for inet/127.0.0.1
378			is_local = 0;
379			sockaddr_un sa;
380			socklen_t sl = sizeof (sa);
381
382			if (!getsockname (fd, (sockaddr *)&sa, &sl))
383			is_local = sa.sun_family == AF_LOCAL;
384			#endif
385
386	root	1.1	x_ev.start (fd, EVENT_READ);
387			fcntl (fd, F_SETFD, FD_CLOEXEC);
388
389			XSelectInput (display, root, PropertyChangeMask);
390
391			flush ();
392
393			return true;
394			}
395
396	root	1.23	void
397			rxvt_display::ref_next ()
398			{
399			// TODO: somehow check wether the database files/resources changed
400	root	1.46	// before affording re-loading/parsing
401	root	1.23	XrmDestroyDatabase (XrmGetDatabase (display));
402			XrmSetDatabase (display, get_resources ());
403			}
404
405	root	1.1	rxvt_display::~rxvt_display ()
406			{
407	root	1.22	if (!display)
408			return;
409
410	root	1.21	#ifdef POINTER_BLANK
411			XFreeCursor (display, blank_cursor);
412			#endif
413	root	1.1	x_ev.stop ();
414	root	1.12	#ifdef USE_XIM
415			xims.clear ();
416			#endif
417	root	1.22	XCloseDisplay (display);
418	root	1.1	}
419
420			#ifdef USE_XIM
421			void rxvt_display::im_change_cb ()
422			{
423			for (im_watcher **i = imw.begin (); i != imw.end (); ++i)
424			(*i)->call ();
425			}
426	root	1.5
427			void rxvt_display::im_change_check ()
428			{
429	root	1.13	// try to only call im_change_cb when a new input method
430	root	1.5	// registers, as xlib crashes due to a race otherwise.
431			Atom actual_type, *atoms;
432			int actual_format;
433			unsigned long nitems, bytes_after;
434
435	root	1.25	if (XGetWindowProperty (display, root, xa[XA_XIM_SERVERS], 0L, 1000000L,
436	root	1.5	False, XA_ATOM, &actual_type, &actual_format,
437			&nitems, &bytes_after, (unsigned char **)&atoms)
438			!= Success )
439			return;
440
441			if (actual_type == XA_ATOM && actual_format == 32)
442			for (int i = 0; i < nitems; i++)
443			if (XGetSelectionOwner (display, atoms[i]))
444			{
445			im_change_cb ();
446			break;
447			}
448
449			XFree (atoms);
450			}
451	root	1.1	#endif
452
453			void rxvt_display::x_cb (io_watcher &w, short revents)
454			{
455			do
456			{
457			XEvent xev;
458			XNextEvent (display, &xev);
459
460	root	1.5	#ifdef USE_XIM
461			if (!XFilterEvent (&xev, None))
462			{
463			if (xev.type == PropertyNotify
464			&& xev.xany.window == root
465	root	1.25	&& xev.xproperty.atom == xa[XA_XIM_SERVERS])
466	root	1.5	im_change_check ();
467			#endif
468			for (int i = xw.size (); i--; )
469			{
470			if (!xw[i])
471			xw.erase_unordered (i);
472			else if (xw[i]->window == xev.xany.window)
473			xw[i]->call (xev);
474			}
475	root	1.1	#ifdef USE_XIM
476	root	1.5	}
477	root	1.1	#endif
478			}
479	root	1.6	while (XEventsQueued (display, QueuedAlready));
480	root	1.1
481	root	1.10	XFlush (display);
482	root	1.1	}
483
484			void rxvt_display::flush ()
485			{
486	root	1.10	if (XEventsQueued (display, QueuedAlready))
487			x_cb (x_ev, EVENT_READ);
488
489	root	1.8	XFlush (display);
490	root	1.1	}
491
492			void rxvt_display::reg (xevent_watcher *w)
493			{
494			xw.push_back (w);
495			w->active = xw.size ();
496			}
497
498			void rxvt_display::unreg (xevent_watcher *w)
499			{
500			if (w->active)
501			xw[w->active - 1] = 0;
502			}
503
504			void rxvt_display::set_selection_owner (rxvt_term *owner)
505			{
506			if (selection_owner && selection_owner != owner)
507			selection_owner->selection_clear ();
508
509			selection_owner = owner;
510			}
511
512			#ifdef USE_XIM
513	root	1.46
514	root	1.1	void rxvt_display::reg (im_watcher *w)
515			{
516			imw.push_back (w);
517			}
518
519			void rxvt_display::unreg (im_watcher *w)
520			{
521			imw.erase (find (imw.begin (), imw.end (), w));
522			}
523
524			rxvt_xim rxvt_display::get_xim (const char locale, const char *modifiers)
525			{
526			char *id;
527			int l, m;
528
529			l = strlen (locale);
530			m = strlen (modifiers);
531
532			if (!(id = (char *)malloc (l + m + 2)))
533			return 0;
534
535			memcpy (id, locale, l); id[l] = '\n';
536			memcpy (id + l + 1, modifiers, m); id[l + m + 1] = 0;
537
538			rxvt_xim *xim = xims.get (id);
539
540			free (id);
541
542			return xim;
543			}
544
545			void rxvt_display::put_xim (rxvt_xim *xim)
546			{
547	root	1.46	# if XLIB_IS_RACEFREE
548	root	1.1	xims.put (xim);
549	root	1.46	# endif
550	root	1.1	}
551	root	1.46
552	root	1.1	#endif
553
554			Atom rxvt_display::atom (const char *name)
555			{
556			return XInternAtom (display, name, False);
557			}
558
559			/////////////////////////////////////////////////////////////////////////////
560
561			template class refcache<rxvt_display>;
562			refcache<rxvt_display> displays;
563
564			/////////////////////////////////////////////////////////////////////////////
565	root	1.38
566	root	1.1	bool
567	root	1.43	rxvt_color::alloc (rxvt_screen *screen, const rgba &color)
568	root	1.1	{
569	root	1.28	#if XFT
570	root	1.31	XRenderPictFormat *format;
571	root	1.28
572	root	1.48	// FUCKING Xft gets it wrong, of course, so work around it.
573			// Transparency users should eat shit and die, and then
574	root	1.31	// XRenderQueryPictIndexValues themselves plenty.
575	root	1.48	if ((screen->visual->c_class == TrueColor)
576	root	1.31	&& (format = XRenderFindVisualFormat (screen->xdisp, screen->visual)))
577			{
578			// the fun lies in doing everything manually...
579	root	1.40	c.color.red = color.r;
580			c.color.green = color.g;
581			c.color.blue = color.b;
582			c.color.alpha = color.a;
583
584	root	1.43	c.pixel = ((color.r * format->direct.redMask / rgba::MAX_CC) << format->direct.red )
585			\| ((color.g * format->direct.greenMask / rgba::MAX_CC) << format->direct.green)
586			\| ((color.b * format->direct.blueMask / rgba::MAX_CC) << format->direct.blue )
587			\| ((color.a * format->direct.alphaMask / rgba::MAX_CC) << format->direct.alpha);
588	root	1.29
589			return true;
590			}
591	root	1.31	else
592			{
593			XRenderColor d;
594
595	root	1.40	d.red = color.r;
596			d.green = color.g;
597			d.blue = color.b;
598			d.alpha = color.a;
599	root	1.31
600			return XftColorAllocValue (screen->xdisp, screen->visual, screen->cmap, &d, &c);
601			}
602	root	1.28	#else
603	root	1.46	c.red = color.r;
604			c.green = color.g;
605			c.blue = color.b;
606
607	root	1.48	if (screen->visual->c_class == TrueColor)
608	root	1.35	{
609	root	1.43	c.pixel = (color.r * (screen->visual->red_mask >> ctz (screen->visual->red_mask ))
610			/ rgba::MAX_CC) << ctz (screen->visual->red_mask )
611			\| (color.g * (screen->visual->green_mask >> ctz (screen->visual->green_mask))
612			/ rgba::MAX_CC) << ctz (screen->visual->green_mask)
613			\| (color.b * (screen->visual->blue_mask >> ctz (screen->visual->blue_mask ))
614			/ rgba::MAX_CC) << ctz (screen->visual->blue_mask );
615	root	1.1
616	root	1.35	return true;
617			}
618	root	1.46	else if (XAllocColor (screen->xdisp, screen->cmap, &c))
619			return true;
620	root	1.35	else
621	root	1.46	c.pixel = (color.r + color.g + color.b) > 128*3
622			? WhitePixelOfScreen (DefaultScreenOfDisplay (screen->xdisp))
623			: BlackPixelOfScreen (DefaultScreenOfDisplay (screen->xdisp));
624	root	1.38	#endif
625	root	1.1
626			return false;
627	root	1.38	}
628
629			bool
630			rxvt_color::set (rxvt_screen screen, const char name)
631			{
632	root	1.43	rgba c;
633	root	1.38	char eos;
634	root	1.39	int skip;
635	root	1.38
636	root	1.46	// parse the nonstandard "[alphapercent]" prefix
637	root	1.41	if (1 <= sscanf (name, "[%hd]%n", &c.a, &skip))
638	root	1.38	{
639	root	1.43	c.a = lerp<int, int, int> (0, rgba::MAX_CC, c.a);
640	root	1.39	name += skip;
641	root	1.38	}
642			else
643	root	1.43	c.a = rgba::MAX_CC;
644	root	1.39
645	root	1.46	// parse the non-standard "rgba:rrrr/gggg/bbbb/aaaa" format
646			if (strlen (name) != 4+5*4 \|\| 4 != sscanf (name, "rgba:%4hx/%4hx/%4hx/%4hx%c", &c.r, &c.g, &c.b, &c.a, &eos))
647	root	1.38	{
648	root	1.39	XColor xc, xc_exact;
649
650			if (XParseColor (screen->xdisp, screen->cmap, name, &xc))
651			{
652			c.r = xc.red;
653			c.g = xc.green;
654			c.b = xc.blue;
655			}
656			else
657			{
658			c.r = 0xffff;
659			c.g = 0x6969;
660			c.b = 0xb4b4;
661
662			rxvt_warn ("unable to parse color '%s', using pink instead.\n", name);
663			}
664	root	1.38	}
665
666	root	1.39	return set (screen, c);
667	root	1.38	}
668
669			bool
670	root	1.43	rxvt_color::set (rxvt_screen *screen, const rgba &color)
671	root	1.38	{
672	root	1.40	bool got = alloc (screen, color);
673	root	1.38
674			#if !ENABLE_MINIMAL
675			int cmap_size = screen->visual->map_entries;
676
677			if (!got
678			&& screen->visual->c_class == PseudoColor
679			&& cmap_size < 4096)
680			{
681			XColor *colors = new XColor [screen->visual->map_entries];
682
683			for (int i = 0; i < cmap_size; i++)
684			colors [i].pixel = i;
685
686	root	1.43	// many kilobytes transfer per colour, but pseudocolor isn't worth
687			// many extra optimisations.
688	root	1.38	XQueryColors (screen->xdisp, screen->cmap, colors, cmap_size);
689
690			int diff = 0x7fffffffUL;
691			XColor *best = colors;
692
693			for (int i = 0; i < cmap_size; i++)
694			{
695	root	1.40	int d = (squared_diff<int> (color.r >> 2, colors [i].red >> 2))
696			+ (squared_diff<int> (color.g >> 2, colors [i].green >> 2))
697			+ (squared_diff<int> (color.b >> 2, colors [i].blue >> 2));
698	root	1.38
699			if (d < diff)
700			{
701			diff = d;
702			best = colors + i;
703			}
704			}
705
706			//rxvt_warn ("could not allocate %04x %04x %04x, getting %04x %04x %04x instead (%d)\n",
707	root	1.40	// color.r, color.g, color.b, best->red, best->green, best->blue, diff);
708	root	1.38
709	root	1.43	got = alloc (screen, rgba (best->red, best->green, best->blue));
710	root	1.38
711			delete colors;
712			}
713	root	1.28	#endif
714	root	1.38
715			return got;
716	root	1.1	}
717
718	root	1.39	void
719	root	1.44	rxvt_color::get (rgba &color)
720	root	1.1	{
721			#if XFT
722	root	1.40	color.r = c.color.red;
723			color.g = c.color.green;
724			color.b = c.color.blue;
725			color.a = c.color.alpha;
726	root	1.1	#else
727	root	1.40	color.r = c.red;
728			color.g = c.green;
729			color.b = c.blue;
730	root	1.43	color.a = rgba::MAX_CC;
731	root	1.1	#endif
732			}
733
734	root	1.46	void
735			rxvt_color::get (XColor &color)
736			{
737			rgba c;
738			get (c);
739
740			color.red = c.r;
741			color.green = c.g;
742			color.blue = c.b;
743			color.pixel = (Pixel)*this;
744			}
745
746	root	1.1	void
747	root	1.26	rxvt_color::free (rxvt_screen *screen)
748	root	1.1	{
749			#if XFT
750	root	1.26	XftColorFree (screen->xdisp, screen->visual, screen->cmap, &c);
751	root	1.1	#else
752	root	1.43	XFreeColors (screen->xdisp, screen->cmap, &c.pixel, 1, AllPlanes);
753	root	1.1	#endif
754			}
755
756	root	1.42	void
757	root	1.43	rxvt_color::fade (rxvt_screen *screen, int percent, rxvt_color &result, const rgba &to)
758	root	1.1	{
759	root	1.43	rgba c;
760	root	1.44	get (c);
761	root	1.1
762	root	1.42	result.set (
763	root	1.26	screen,
764	root	1.43	rgba (
765	root	1.42	lerp (c.r, to.r, percent),
766			lerp (c.g, to.g, percent),
767			lerp (c.b, to.b, percent),
768			lerp (c.a, to.a, percent)
769	root	1.28	)
770	root	1.18	);
771	root	1.1	}
772