rxvt-unicode/src/rxvtcolor.C

/*--------------------------------*-C-*---------------------------------*
 * File:        rxvtcolor.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 <rxvtcolor.h>

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

class byteorder byteorder;

byteorder::byteorder ()
{
  union {
    uint32_t u;
    uint8_t b[4];
  } w;

  w.b[0] = 0x11;
  w.b[1] = 0x22;
  w.b[2] = 0x33;
  w.b[3] = 0x44;

  e = w.u;
}

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++;
          return *i;
        }
    }

  T *obj = new T (id);

  obj->referenced = 1;

  if (obj && obj->init ())
    {
      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>
refcache<T>::~refcache ()
{
  while (this->size ())
    put (*this->begin ());
}

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

#ifdef USE_XIM
static void
im_destroy_cb (XIM unused1, XPointer client_data, XPointer unused3)
{
  rxvt_xim *xim = (rxvt_xim *)client_data;
  rxvt_display *display = xim->display;

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

  display->im_change_cb ();
}

bool rxvt_xim::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;

  ((void (*)(XIM, ...)) 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)
{
}

bool rxvt_display::init ()
{
  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);

#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);
  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;
}

rxvt_display::~rxvt_display ()
{
  x_ev.stop ();

  if (display)
    XCloseDisplay (display);
}

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

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

      //printf ("T %d w %lx\n", xev.type, xev.xany.window);//D

#ifdef USE_XIM
      if (xev.type == PropertyNotify
          && xev.xany.window == root
          && xev.xproperty.atom == xa_xim_servers)
        im_change_cb ();
#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);
        }
    }
  while (XPending (display));

  flush ();
}

void rxvt_display::flush ()
{
  for (;;)
    {
      XFlush (display);

      if (!XPending (display))
        break;

      x_cb (x_ev, 0);
    }
}

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)
{
  xims.put (xim);
}
#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)
{
  XColor xc;

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

  return false;
}

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
}

Revision:	1.17
Committed:	Thu Jul 29 22:34:12 2004 UTC (19 years, 9 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.16:	+2 -1 lines
Log Message:	* empty log message *
#	Content
1	/---------------------------------C----------------------------------
2	* File: rxvtcolor.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 <rxvtcolor.h>
26
27	#include <unistd.h>
28	#include <fcntl.h>
29
30	class byteorder byteorder;
31
32	byteorder::byteorder ()
33	{
34	union {
35	uint32_t u;
36	uint8_t b[4];
37	} w;
38
39	w.b[0] = 0x11;
40	w.b[1] = 0x22;
41	w.b[2] = 0x33;
42	w.b[3] = 0x44;
43
44	e = w.u;
45	}
46
47	refcounted::refcounted (const char *id)
48	{
49	this->id = STRDUP (id);
50	}
51
52	refcounted::~refcounted ()
53	{
54	free (id);
55	}
56
57	template<class T>
58	T refcache<T>::get (const char id)
59	{
60	for (T **i = this->begin (); i < this->end (); ++i)
61	{
62	if (!strcmp (id, (*i)->id))
63	{
64	(*i)->referenced++;
65	return *i;
66	}
67	}
68
69	T *obj = new T (id);
70
71	obj->referenced = 1;
72
73	if (obj && obj->init ())
74	{
75	this->push_back (obj);
76	return obj;
77	}
78	else
79	{
80	delete obj;
81	return 0;
82	}
83	}
84
85	template<class T>
86	void refcache<T>::put (T *obj)
87	{
88	if (!obj)
89	return;
90
91	if (!--obj->referenced)
92	{
93	this->erase (find (this->begin (), this->end (), obj));
94	delete obj;
95	}
96	}
97
98	template<class T>
99	refcache<T>::~refcache ()
100	{
101	while (this->size ())
102	put (*this->begin ());
103	}
104
105	/////////////////////////////////////////////////////////////////////////////
106
107	#ifdef USE_XIM
108	static void
109	im_destroy_cb (XIM unused1, XPointer client_data, XPointer unused3)
110	{
111	rxvt_xim xim = (rxvt_xim )client_data;
112	rxvt_display *display = xim->display;
113
114	display->xims.erase (find (display->xims.begin (), display->xims.end (), xim));
115
116	display->im_change_cb ();
117	}
118
119	bool rxvt_xim::init ()
120	{
121	display = GET_R->display; //HACK: TODO
122
123	xim = XOpenIM (display->display, NULL, NULL, NULL);
124
125	if (!xim)
126	return false;
127
128	XIMCallback ximcallback;
129	ximcallback.client_data = (XPointer)this;
130	ximcallback.callback = im_destroy_cb;
131
132	((void (*)(XIM, ...)) XSetIMValues)
133	(xim, XNDestroyCallback, &ximcallback, NULL);
134
135	return true;
136	}
137
138	rxvt_xim::~rxvt_xim ()
139	{
140	if (xim)
141	XCloseIM (xim);
142	}
143	#endif
144
145	/////////////////////////////////////////////////////////////////////////////
146
147	rxvt_display::rxvt_display (const char *id)
148	: refcounted (id)
149	, x_ev (this, &rxvt_display::x_cb)
150	, selection_owner (0)
151	{
152	}
153
154	bool rxvt_display::init ()
155	{
156	display = XOpenDisplay (id);
157
158	if (!display)
159	return false;
160
161	screen = DefaultScreen (display);
162	root = DefaultRootWindow (display);
163	visual = DefaultVisual (display, screen);
164	cmap = DefaultColormap (display, screen);
165	depth = DefaultDepth (display, screen);
166
167	#ifdef PREFER_24BIT
168	/*
169	* If depth is not 24, look for a 24bit visual.
170	*/
171	if (depth != 24)
172	{
173	XVisualInfo vinfo;
174
175	if (XMatchVisualInfo (display, screen, 24, TrueColor, &vinfo))
176	{
177	depth = 24;
178	visual = vinfo.visual;
179	cmap = XCreateColormap (display,
180	RootWindow (display, screen),
181	visual, AllocNone);
182	}
183	}
184	#endif
185
186	int fd = XConnectionNumber (display);
187	x_ev.start (fd, EVENT_READ);
188	fcntl (fd, F_SETFD, FD_CLOEXEC);
189
190	XSelectInput (display, root, PropertyChangeMask);
191	#ifdef USE_XIM
192	xa_xim_servers = XInternAtom (display, "XIM_SERVERS", 0);
193	#endif
194
195	flush ();
196
197	return true;
198	}
199
200	rxvt_display::~rxvt_display ()
201	{
202	x_ev.stop ();
203
204	if (display)
205	XCloseDisplay (display);
206	}
207
208	#ifdef USE_XIM
209	void rxvt_display::im_change_cb ()
210	{
211	for (im_watcher **i = imw.begin (); i != imw.end (); ++i)
212	(*i)->call ();
213	}
214	#endif
215
216	void rxvt_display::x_cb (io_watcher &w, short revents)
217	{
218	do
219	{
220	XEvent xev;
221	XNextEvent (display, &xev);
222
223	//printf ("T %d w %lx\n", xev.type, xev.xany.window);//D
224
225	#ifdef USE_XIM
226	if (xev.type == PropertyNotify
227	&& xev.xany.window == root
228	&& xev.xproperty.atom == xa_xim_servers)
229	im_change_cb ();
230	#endif
231
232	for (int i = xw.size (); i--; )
233	{
234	if (!xw[i])
235	xw.erase_unordered (i);
236	else if (xw[i]->window == xev.xany.window)
237	xw[i]->call (xev);
238	}
239	}
240	while (XPending (display));
241
242	flush ();
243	}
244
245	void rxvt_display::flush ()
246	{
247	for (;;)
248	{
249	XFlush (display);
250
251	if (!XPending (display))
252	break;
253
254	x_cb (x_ev, 0);
255	}
256	}
257
258	void rxvt_display::reg (xevent_watcher *w)
259	{
260	xw.push_back (w);
261	w->active = xw.size ();
262	}
263
264	void rxvt_display::unreg (xevent_watcher *w)
265	{
266	if (w->active)
267	xw[w->active - 1] = 0;
268	}
269
270	void rxvt_display::set_selection_owner (rxvt_term *owner)
271	{
272	if (selection_owner && selection_owner != owner)
273	selection_owner->selection_clear ();
274
275	selection_owner = owner;
276	}
277
278	#ifdef USE_XIM
279	void rxvt_display::reg (im_watcher *w)
280	{
281	imw.push_back (w);
282	}
283
284	void rxvt_display::unreg (im_watcher *w)
285	{
286	imw.erase (find (imw.begin (), imw.end (), w));
287	}
288
289	rxvt_xim rxvt_display::get_xim (const char locale, const char *modifiers)
290	{
291	char *id;
292	int l, m;
293
294	l = strlen (locale);
295	m = strlen (modifiers);
296
297	if (!(id = (char *)malloc (l + m + 2)))
298	return 0;
299
300	memcpy (id, locale, l); id[l] = '\n';
301	memcpy (id + l + 1, modifiers, m); id[l + m + 1] = 0;
302
303	rxvt_xim *xim = xims.get (id);
304
305	free (id);
306
307	return xim;
308	}
309
310	void rxvt_display::put_xim (rxvt_xim *xim)
311	{
312	xims.put (xim);
313	}
314	#endif
315
316	Atom rxvt_display::atom (const char *name)
317	{
318	return XInternAtom (display, name, False);
319	}
320
321	/////////////////////////////////////////////////////////////////////////////
322
323	template class refcache<rxvt_display>;
324	refcache<rxvt_display> displays;
325
326	/////////////////////////////////////////////////////////////////////////////
327
328	bool
329	rxvt_color::set (rxvt_display *display, Pixel p)
330	{
331	#if XFT
332	XColor xc;
333
334	xc.pixel = p;
335	if (!XQueryColor (display->display, display->cmap, &xc))
336	return false;
337
338	XRenderColor d;
339
340	d.red = xc.red;
341	d.green = xc.green;
342	d.blue = xc.blue;
343	d.alpha = 0xffff;
344
345	return
346	XftColorAllocValue (display->display,
347	display->visual,
348	display->cmap,
349	&d, &c);
350	#else
351	this->p = p;
352	#endif
353
354	return true;
355	}
356
357	bool
358	rxvt_color::set (rxvt_display display, const char name)
359	{
360	XColor xc;
361
362	if (XParseColor (display->display, display->cmap, name, &xc))
363	return set (display, xc.red, xc.green, xc.blue);
364
365	return false;
366	}
367
368	bool
369	rxvt_color::set (rxvt_display *display, unsigned short cr, unsigned short cg, unsigned short cb)
370	{
371	XColor xc;
372
373	xc.red = cr;
374	xc.green = cg;
375	xc.blue = cb;
376	xc.flags = DoRed \| DoGreen \| DoBlue;
377
378	if (XAllocColor (display->display, display->cmap, &xc))
379	return set (display, xc.pixel);
380
381	return false;
382	}
383
384	void
385	rxvt_color::get (rxvt_display *display, unsigned short &cr, unsigned short &cg, unsigned short &cb)
386	{
387	#if XFT
388	cr = c.color.red;
389	cg = c.color.green;
390	cb = c.color.blue;
391	#else
392	XColor c;
393
394	c.pixel = p;
395	XQueryColor (display->display, display->cmap, &c);
396
397	cr = c.red;
398	cg = c.green;
399	cb = c.blue;
400	#endif
401	}
402
403	void
404	rxvt_color::free (rxvt_display *display)
405	{
406	#if XFT
407	XftColorFree (display->display, display->visual, display->cmap, &c);
408	#else
409	XFreeColors (display->display, display->cmap, &p, 1, AllPlanes);
410	#endif
411	}
412