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->dpy, 0, 0, 0);

  if (!xim)
    return false;

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

  XSetIMValues (xim, XNDestroyCallback, &ximcallback, 0);

  return true;
}

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

#endif

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

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

  Screen *screen = ScreenOfDisplay (dpy, 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 (dpy, display->screen, bitdepth, TrueColor, &vinfo))
    {
      depth  = bitdepth;
      visual = vinfo.visual;
      cmap   = XCreateColormap (dpy, disp->root, visual, AllocNone);
    }
#endif
}

void
rxvt_screen::clear ()
{
  if (cmap != DefaultColormapOfScreen (ScreenOfDisplay (dpy, display->screen)))
    XFreeColormap (dpy, 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 (bool refresh)
{
  char *homedir = (char *)getenv ("HOME");
  char fname[1024];

  /*
   * get resources using the X library function
   */
  char *displayResource, *xe;
  XrmDatabase rdb1, database = 0;

  // 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 */
  if (refresh)
    {
      // fucking xlib keeps a copy of the rm string
      Atom actual_type;
      int actual_format;
      unsigned long nitems, nremaining;
      char *val = 0;

#if XLIB_ILLEGAL_ACCESS
      if (dpy->xdefaults)
        XFree (dpy->xdefaults);
#endif

      if (XGetWindowProperty (dpy, root, XA_RESOURCE_MANAGER,
                              0L, 100000000L, False,
                              XA_STRING, &actual_type, &actual_format,
                              &nitems, &nremaining,
                              (unsigned char **)&val) == Success
          && actual_type == XA_STRING
          && actual_format == 8)
         displayResource = val;
       else
         {
           displayResource = 0;
           if (val)
             XFree(val);
         }

#if XLIB_ILLEGAL_ACCESS
      dpy->xdefaults = displayResource;
#endif
    }
  else
    displayResource = XResourceManagerString (dpy);

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

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

#if !XLIB_ILLEGAL_ACCESS
  if (refresh && displayResource)
    XFree (displayResource);
#endif

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

  if (displayResource)
    {
      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);
      dpy = XOpenDisplay (val);
      free (val);
    }
  else
#endif
    dpy = 0;

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

  if (!dpy)
    return false;

  screen = DefaultScreen     (dpy);
  root   = DefaultRootWindow (dpy);

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

  XrmSetDatabase (dpy, get_resources (false));

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

  int fd = XConnectionNumber (dpy);

#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 (dpy, 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 (dpy));
  XrmSetDatabase (dpy, get_resources (true));
}

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

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

#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 (dpy, 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 (dpy, atoms[i]))
        {
          im_change_cb ();
          break;
        }

  XFree (atoms);
}
#endif

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

  XFlush (dpy);
}

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

  XFlush (dpy);
}

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 (dpy, 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->dpy, 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->dpy, 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->dpy, screen->cmap, &c))
    return true;
  else
    c.pixel = (color.r + color.g + color.b) > 128*3
            ? WhitePixelOfScreen (DefaultScreenOfDisplay (screen->dpy))
            : BlackPixelOfScreen (DefaultScreenOfDisplay (screen->dpy));
#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->dpy, 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->dpy, 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->dpy, screen->visual, screen->cmap, &c);
#else
  XFreeColors (screen->dpy, 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:	1.50
Committed:	Thu Feb 2 18:04:46 2006 UTC (18 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-7_6
Changes since 1.49:	+49 -49 lines
Log Message:	* empty log message *
#	Content
1	/---------------------------------C----------------------------------
2	* File: rxvttoolkit.C
3	----------------------------------------------------------------------
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	#include <sys/utsname.h>
31
32	#ifndef NO_SLOW_LINK_SUPPORT
33	# include <sys/socket.h>
34	# include <sys/un.h>
35	#endif
36
37	#if XFT
38	# include <X11/extensions/Xrender.h>
39	#endif
40
41	const char *const xa_names[] =
42	{
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	#if ENABLE_FRILLS
60	"_MOTIF_WM_HINTS",
61	#endif
62	#if ENABLE_EWMH
63	"_NET_WM_PID",
64	"_NET_WM_NAME",
65	"_NET_WM_ICON_NAME",
66	"_NET_WM_PING",
67	#endif
68	#if USE_XIM
69	"WM_LOCALE_NAME",
70	"XIM_SERVERS",
71	#endif
72	#ifdef TRANSPARENT
73	"_XROOTPMAP_ID",
74	"ESETROOT_PMAP_ID",
75	#endif
76	#if ENABLE_XEMBED
77	"_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	"cursor",
87	# if USE_XIM
88	"TRANSPORT",
89	"LOCALES",
90	"_XIM_PROTOCOL",
91	"_XIM_XCONNECT",
92	"_XIM_MOREDATA",
93	# endif
94	#endif
95	};
96
97	/////////////////////////////////////////////////////////////////////////////
98
99	refcounted::refcounted (const char *id)
100	{
101	this->id = strdup (id);
102	}
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	++(*i)->referenced;
117	(*i)->ref_next ();
118	return *i;
119	}
120	}
121
122	T *obj = new T (id);
123
124	if (obj && obj->ref_init ())
125	{
126	obj->referenced = 1;
127	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	void refcache<T>::clear ()
152	{
153	while (this->size ())
154	put (*this->begin ());
155	}
156
157	/////////////////////////////////////////////////////////////////////////////
158
159	#ifdef USE_XIM
160
161	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	xim->xim = 0;
172
173	display->xims.erase (find (display->xims.begin (), display->xims.end (), xim));
174	display->im_change_cb ();
175	}
176
177	bool
178	rxvt_xim::ref_init ()
179	{
180	display = GET_R->display; //HACK: TODO
181
182	xim = XOpenIM (display->dpy, 0, 0, 0);
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, 0);
192
193	return true;
194	}
195
196	rxvt_xim::~rxvt_xim ()
197	{
198	if (xim)
199	XCloseIM (xim);
200	}
201
202	#endif
203
204	/////////////////////////////////////////////////////////////////////////////
205
206	void
207	rxvt_screen::set (rxvt_display *disp)
208	{
209	display = disp;
210	dpy = disp->dpy;
211
212	Screen *screen = ScreenOfDisplay (dpy, disp->screen);
213
214	depth = DefaultDepthOfScreen (screen);
215	visual = DefaultVisualOfScreen (screen);
216	cmap = DefaultColormapOfScreen (screen);
217	}
218
219	void
220	rxvt_screen::set (rxvt_display *disp, int bitdepth)
221	{
222	set (disp);
223
224	#if XFT
225	XVisualInfo vinfo;
226
227	if (XMatchVisualInfo (dpy, display->screen, bitdepth, TrueColor, &vinfo))
228	{
229	depth = bitdepth;
230	visual = vinfo.visual;
231	cmap = XCreateColormap (dpy, disp->root, visual, AllocNone);
232	}
233	#endif
234	}
235
236	void
237	rxvt_screen::clear ()
238	{
239	if (cmap != DefaultColormapOfScreen (ScreenOfDisplay (dpy, display->screen)))
240	XFreeColormap (dpy, cmap);
241	}
242
243	/////////////////////////////////////////////////////////////////////////////
244
245	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	XrmDatabase
253	rxvt_display::get_resources (bool refresh)
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 rdb1, database = 0;
263
264	// for ordering, see for example http://www.faqs.org/faqs/Xt-FAQ/ Subject: 20
265
266	// 6. System wide per application default file.
267
268	/* Add in $XAPPLRESDIR/Rxvt only; not bothering with XUSERFILESEARCHPATH */
269	if ((xe = (char *)getenv ("XAPPLRESDIR")))
270	{
271	snprintf (fname, sizeof (fname), "%s/%s", xe, RESCLASS);
272
273	if ((rdb1 = XrmGetFileDatabase (fname)))
274	XrmMergeDatabases (rdb1, &database);
275	}
276
277	// 5. User's per application default file.
278	// none
279
280	// 4. User's defaults file.
281	/* Get any Xserver defaults */
282	if (refresh)
283	{
284	// fucking xlib keeps a copy of the rm string
285	Atom actual_type;
286	int actual_format;
287	unsigned long nitems, nremaining;
288	char *val = 0;
289
290	#if XLIB_ILLEGAL_ACCESS
291	if (dpy->xdefaults)
292	XFree (dpy->xdefaults);
293	#endif
294
295	if (XGetWindowProperty (dpy, root, XA_RESOURCE_MANAGER,
296	0L, 100000000L, False,
297	XA_STRING, &actual_type, &actual_format,
298	&nitems, &nremaining,
299	(unsigned char **)&val) == Success
300	&& actual_type == XA_STRING
301	&& actual_format == 8)
302	displayResource = val;
303	else
304	{
305	displayResource = 0;
306	if (val)
307	XFree(val);
308	}
309
310	#if XLIB_ILLEGAL_ACCESS
311	dpy->xdefaults = displayResource;
312	#endif
313	}
314	else
315	displayResource = XResourceManagerString (dpy);
316
317	if (displayResource)
318	{
319	if ((rdb1 = XrmGetStringDatabase (displayResource)))
320	XrmMergeDatabases (rdb1, &database);
321	}
322	else if (homedir)
323	{
324	snprintf (fname, sizeof (fname), "%s/.Xdefaults", homedir);
325
326	if ((rdb1 = XrmGetFileDatabase (fname)))
327	XrmMergeDatabases (rdb1, &database);
328	}
329
330	#if !XLIB_ILLEGAL_ACCESS
331	if (refresh && displayResource)
332	XFree (displayResource);
333	#endif
334
335	/* Get screen specific resources */
336	displayResource = XScreenResourceString (ScreenOfDisplay (dpy, screen));
337
338	if (displayResource)
339	{
340	if ((rdb1 = XrmGetStringDatabase (displayResource)))
341	/* Merge with screen-independent resources */
342	XrmMergeDatabases (rdb1, &database);
343
344	XFree (displayResource);
345	}
346
347	// 3. User's per host defaults file
348	/* Add in XENVIRONMENT file */
349	if ((xe = (char *)getenv ("XENVIRONMENT"))
350	&& (rdb1 = XrmGetFileDatabase (xe)))
351	XrmMergeDatabases (rdb1, &database);
352	else if (homedir)
353	{
354	struct utsname un;
355
356	if (!uname (&un))
357	{
358	snprintf (fname, sizeof (fname), "%s/.Xdefaults-%s", homedir, un.nodename);
359
360	if ((rdb1 = XrmGetFileDatabase (fname)))
361	XrmMergeDatabases (rdb1, &database);
362	}
363	}
364
365	return database;
366	}
367
368	bool rxvt_display::ref_init ()
369	{
370	#ifdef LOCAL_X_IS_UNIX
371	if (id[0] == ':')
372	{
373	val = rxvt_malloc (5 + strlen (id) + 1);
374	strcpy (val, "unix/");
375	strcat (val, id);
376	dpy = XOpenDisplay (val);
377	free (val);
378	}
379	else
380	#endif
381	dpy = 0;
382
383	if (!dpy)
384	dpy = XOpenDisplay (id);
385
386	if (!dpy)
387	return false;
388
389	screen = DefaultScreen (dpy);
390	root = DefaultRootWindow (dpy);
391
392	assert (sizeof (xa_names) / sizeof (char *) == NUM_XA);
393	XInternAtoms (dpy, (char **)xa_names, NUM_XA, False, xa);
394
395	XrmSetDatabase (dpy, get_resources (false));
396
397	#ifdef POINTER_BLANK
398	XColor blackcolour;
399	blackcolour.red = 0;
400	blackcolour.green = 0;
401	blackcolour.blue = 0;
402	Font f = XLoadFont (dpy, "fixed");
403	blank_cursor = XCreateGlyphCursor (dpy, f, f, ' ', ' ',
404	&blackcolour, &blackcolour);
405	XUnloadFont (dpy, f);
406	#endif
407
408	int fd = XConnectionNumber (dpy);
409
410	#ifndef NO_SLOW_LINK_SUPPORT
411	// try to detect wether we have a local connection.
412	// assume unix domains socket == local, everything else not
413	// TODO: might want to check for inet/127.0.0.1
414	is_local = 0;
415	sockaddr_un sa;
416	socklen_t sl = sizeof (sa);
417
418	if (!getsockname (fd, (sockaddr *)&sa, &sl))
419	is_local = sa.sun_family == AF_LOCAL;
420	#endif
421
422	x_ev.start (fd, EVENT_READ);
423	fcntl (fd, F_SETFD, FD_CLOEXEC);
424
425	XSelectInput (dpy, root, PropertyChangeMask);
426
427	flush ();
428
429	return true;
430	}
431
432	void
433	rxvt_display::ref_next ()
434	{
435	// TODO: somehow check wether the database files/resources changed
436	// before affording re-loading/parsing
437	XrmDestroyDatabase (XrmGetDatabase (dpy));
438	XrmSetDatabase (dpy, get_resources (true));
439	}
440
441	rxvt_display::~rxvt_display ()
442	{
443	if (!dpy)
444	return;
445
446	#ifdef POINTER_BLANK
447	XFreeCursor (dpy, blank_cursor);
448	#endif
449	x_ev.stop ();
450	#ifdef USE_XIM
451	xims.clear ();
452	#endif
453	XCloseDisplay (dpy);
454	}
455
456	#ifdef USE_XIM
457	void rxvt_display::im_change_cb ()
458	{
459	for (im_watcher **i = imw.begin (); i != imw.end (); ++i)
460	(*i)->call ();
461	}
462
463	void rxvt_display::im_change_check ()
464	{
465	// try to only call im_change_cb when a new input method
466	// registers, as xlib crashes due to a race otherwise.
467	Atom actual_type, *atoms;
468	int actual_format;
469	unsigned long nitems, bytes_after;
470
471	if (XGetWindowProperty (dpy, root, xa[XA_XIM_SERVERS], 0L, 1000000L,
472	False, XA_ATOM, &actual_type, &actual_format,
473	&nitems, &bytes_after, (unsigned char **)&atoms)
474	!= Success )
475	return;
476
477	if (actual_type == XA_ATOM && actual_format == 32)
478	for (int i = 0; i < nitems; i++)
479	if (XGetSelectionOwner (dpy, atoms[i]))
480	{
481	im_change_cb ();
482	break;
483	}
484
485	XFree (atoms);
486	}
487	#endif
488
489	void rxvt_display::x_cb (io_watcher &w, short revents)
490	{
491	do
492	{
493	XEvent xev;
494	XNextEvent (dpy, &xev);
495
496	#ifdef USE_XIM
497	if (!XFilterEvent (&xev, None))
498	{
499	if (xev.type == PropertyNotify
500	&& xev.xany.window == root
501	&& xev.xproperty.atom == xa[XA_XIM_SERVERS])
502	im_change_check ();
503	#endif
504	for (int i = xw.size (); i--; )
505	{
506	if (!xw[i])
507	xw.erase_unordered (i);
508	else if (xw[i]->window == xev.xany.window)
509	xw[i]->call (xev);
510	}
511	#ifdef USE_XIM
512	}
513	#endif
514	}
515	while (XEventsQueued (dpy, QueuedAlready));
516
517	XFlush (dpy);
518	}
519
520	void rxvt_display::flush ()
521	{
522	if (XEventsQueued (dpy, QueuedAlready))
523	x_cb (x_ev, EVENT_READ);
524
525	XFlush (dpy);
526	}
527
528	void rxvt_display::reg (xevent_watcher *w)
529	{
530	xw.push_back (w);
531	w->active = xw.size ();
532	}
533
534	void rxvt_display::unreg (xevent_watcher *w)
535	{
536	if (w->active)
537	xw[w->active - 1] = 0;
538	}
539
540	void rxvt_display::set_selection_owner (rxvt_term *owner)
541	{
542	if (selection_owner && selection_owner != owner)
543	selection_owner->selection_clear ();
544
545	selection_owner = owner;
546	}
547
548	#ifdef USE_XIM
549
550	void rxvt_display::reg (im_watcher *w)
551	{
552	imw.push_back (w);
553	}
554
555	void rxvt_display::unreg (im_watcher *w)
556	{
557	imw.erase (find (imw.begin (), imw.end (), w));
558	}
559
560	rxvt_xim rxvt_display::get_xim (const char locale, const char *modifiers)
561	{
562	char *id;
563	int l, m;
564
565	l = strlen (locale);
566	m = strlen (modifiers);
567
568	if (!(id = (char *)malloc (l + m + 2)))
569	return 0;
570
571	memcpy (id, locale, l); id[l] = '\n';
572	memcpy (id + l + 1, modifiers, m); id[l + m + 1] = 0;
573
574	rxvt_xim *xim = xims.get (id);
575
576	free (id);
577
578	return xim;
579	}
580
581	void rxvt_display::put_xim (rxvt_xim *xim)
582	{
583	# if XLIB_IS_RACEFREE
584	xims.put (xim);
585	# endif
586	}
587
588	#endif
589
590	Atom rxvt_display::atom (const char *name)
591	{
592	return XInternAtom (dpy, name, False);
593	}
594
595	/////////////////////////////////////////////////////////////////////////////
596
597	template class refcache<rxvt_display>;
598	refcache<rxvt_display> displays;
599
600	/////////////////////////////////////////////////////////////////////////////
601
602	bool
603	rxvt_color::alloc (rxvt_screen *screen, const rgba &color)
604	{
605	#if XFT
606	XRenderPictFormat *format;
607
608	// FUCKING Xft gets it wrong, of course, so work around it.
609	// Transparency users should eat shit and die, and then
610	// XRenderQueryPictIndexValues themselves plenty.
611	if ((screen->visual->c_class == TrueColor)
612	&& (format = XRenderFindVisualFormat (screen->dpy, screen->visual)))
613	{
614	// the fun lies in doing everything manually...
615	c.color.red = color.r;
616	c.color.green = color.g;
617	c.color.blue = color.b;
618	c.color.alpha = color.a;
619
620	c.pixel = ((color.r * format->direct.redMask / rgba::MAX_CC) << format->direct.red )
621	\| ((color.g * format->direct.greenMask / rgba::MAX_CC) << format->direct.green)
622	\| ((color.b * format->direct.blueMask / rgba::MAX_CC) << format->direct.blue )
623	\| ((color.a * format->direct.alphaMask / rgba::MAX_CC) << format->direct.alpha);
624
625	return true;
626	}
627	else
628	{
629	XRenderColor d;
630
631	d.red = color.r;
632	d.green = color.g;
633	d.blue = color.b;
634	d.alpha = color.a;
635
636	return XftColorAllocValue (screen->dpy, screen->visual, screen->cmap, &d, &c);
637	}
638	#else
639	c.red = color.r;
640	c.green = color.g;
641	c.blue = color.b;
642
643	if (screen->visual->c_class == TrueColor)
644	{
645	c.pixel = (color.r * (screen->visual->red_mask >> ctz (screen->visual->red_mask ))
646	/ rgba::MAX_CC) << ctz (screen->visual->red_mask )
647	\| (color.g * (screen->visual->green_mask >> ctz (screen->visual->green_mask))
648	/ rgba::MAX_CC) << ctz (screen->visual->green_mask)
649	\| (color.b * (screen->visual->blue_mask >> ctz (screen->visual->blue_mask ))
650	/ rgba::MAX_CC) << ctz (screen->visual->blue_mask );
651
652	return true;
653	}
654	else if (XAllocColor (screen->dpy, screen->cmap, &c))
655	return true;
656	else
657	c.pixel = (color.r + color.g + color.b) > 128*3
658	? WhitePixelOfScreen (DefaultScreenOfDisplay (screen->dpy))
659	: BlackPixelOfScreen (DefaultScreenOfDisplay (screen->dpy));
660	#endif
661
662	return false;
663	}
664
665	bool
666	rxvt_color::set (rxvt_screen screen, const char name)
667	{
668	rgba c;
669	char eos;
670	int skip;
671
672	// parse the nonstandard "[alphapercent]" prefix
673	if (1 <= sscanf (name, "[%hd]%n", &c.a, &skip))
674	{
675	c.a = lerp<int, int, int> (0, rgba::MAX_CC, c.a);
676	name += skip;
677	}
678	else
679	c.a = rgba::MAX_CC;
680
681	// parse the non-standard "rgba:rrrr/gggg/bbbb/aaaa" format
682	if (strlen (name) != 4+5*4 \|\| 4 != sscanf (name, "rgba:%4hx/%4hx/%4hx/%4hx%c", &c.r, &c.g, &c.b, &c.a, &eos))
683	{
684	XColor xc, xc_exact;
685
686	if (XParseColor (screen->dpy, screen->cmap, name, &xc))
687	{
688	c.r = xc.red;
689	c.g = xc.green;
690	c.b = xc.blue;
691	}
692	else
693	{
694	c.r = 0xffff;
695	c.g = 0x6969;
696	c.b = 0xb4b4;
697
698	rxvt_warn ("unable to parse color '%s', using pink instead.\n", name);
699	}
700	}
701
702	return set (screen, c);
703	}
704
705	bool
706	rxvt_color::set (rxvt_screen *screen, const rgba &color)
707	{
708	bool got = alloc (screen, color);
709
710	#if !ENABLE_MINIMAL
711	int cmap_size = screen->visual->map_entries;
712
713	if (!got
714	&& screen->visual->c_class == PseudoColor
715	&& cmap_size < 4096)
716	{
717	XColor *colors = new XColor [screen->visual->map_entries];
718
719	for (int i = 0; i < cmap_size; i++)
720	colors [i].pixel = i;
721
722	// many kilobytes transfer per colour, but pseudocolor isn't worth
723	// many extra optimisations.
724	XQueryColors (screen->dpy, screen->cmap, colors, cmap_size);
725
726	int diff = 0x7fffffffUL;
727	XColor *best = colors;
728
729	for (int i = 0; i < cmap_size; i++)
730	{
731	int d = (squared_diff<int> (color.r >> 2, colors [i].red >> 2))
732	+ (squared_diff<int> (color.g >> 2, colors [i].green >> 2))
733	+ (squared_diff<int> (color.b >> 2, colors [i].blue >> 2));
734
735	if (d < diff)
736	{
737	diff = d;
738	best = colors + i;
739	}
740	}
741
742	//rxvt_warn ("could not allocate %04x %04x %04x, getting %04x %04x %04x instead (%d)\n",
743	// color.r, color.g, color.b, best->red, best->green, best->blue, diff);
744
745	got = alloc (screen, rgba (best->red, best->green, best->blue));
746
747	delete colors;
748	}
749	#endif
750
751	return got;
752	}
753
754	void
755	rxvt_color::get (rgba &color)
756	{
757	#if XFT
758	color.r = c.color.red;
759	color.g = c.color.green;
760	color.b = c.color.blue;
761	color.a = c.color.alpha;
762	#else
763	color.r = c.red;
764	color.g = c.green;
765	color.b = c.blue;
766	color.a = rgba::MAX_CC;
767	#endif
768	}
769
770	void
771	rxvt_color::get (XColor &color)
772	{
773	rgba c;
774	get (c);
775
776	color.red = c.r;
777	color.green = c.g;
778	color.blue = c.b;
779	color.pixel = (Pixel)*this;
780	}
781
782	void
783	rxvt_color::free (rxvt_screen *screen)
784	{
785	#if XFT
786	XftColorFree (screen->dpy, screen->visual, screen->cmap, &c);
787	#else
788	XFreeColors (screen->dpy, screen->cmap, &c.pixel, 1, AllPlanes);
789	#endif
790	}
791
792	void
793	rxvt_color::fade (rxvt_screen *screen, int percent, rxvt_color &result, const rgba &to)
794	{
795	rgba c;
796	get (c);
797
798	result.set (
799	screen,
800	rgba (
801	lerp (c.r, to.r, percent),
802	lerp (c.g, to.g, percent),
803	lerp (c.b, to.b, percent),
804	lerp (c.a, to.a, percent)
805	)
806	);
807	}
808