rxvt-unicode/src/keyboard.C

#include "../config.h"
#include "rxvt.h"
#include "keyboard.h"
#include "command.h"
#include <string.h>
#include <X11/X.h>

#ifdef KEYSYM_RESOURCE

////////////////////////////////////////////////////////////////////////////////
// default keycode translation map and keyevent handlers

keysym_t keyboard_manager::stock_keymap[] = {
  /* examples */
  /*        keysym,                state, range,        handler,             str */
//{XK_ISO_Left_Tab,                    0,     1,         NORMAL,           "\033[Z"},
//{            'a',                    0,    26,    RANGE_META8,           "a" "%c"},
//{            'a',          ControlMask,    26,    RANGE_META8,          "" "%c"},
//{        XK_Left,                    0,     4,           LIST,   "DACBZ" "\033[Z"},
//{        XK_Left,            ShiftMask,     4,           LIST,   "dacbZ" "\033[Z"},
//{        XK_Left,          ControlMask,     4,           LIST,   "dacbZ" "\033OZ"},
//{         XK_Tab,          ControlMask,     1,         NORMAL,      "\033<C-Tab>"},
//{  XK_apostrophe,          ControlMask,     1,         NORMAL,        "\033<C-'>"},
//{       XK_slash,          ControlMask,     1,         NORMAL,        "\033<C-/>"},
//{   XK_semicolon,          ControlMask,     1,         NORMAL,        "\033<C-;>"},
//{       XK_grave,          ControlMask,     1,         NORMAL,        "\033<C-`>"},
//{       XK_comma,          ControlMask,     1,         NORMAL,     "\033<C-\054>"},
//{      XK_Return,          ControlMask,     1,         NORMAL,    "\033<C-Return>"},
//{      XK_Return,            ShiftMask,     1,         NORMAL,    "\033<S-Return>"},
//{            ' ',            ShiftMask,     1,         NORMAL,    "\033<S-Space>"},
//{            '.',          ControlMask,     1,         NORMAL,        "\033<C-.>"},
//{            '0',          ControlMask,    10,          RANGE,   "0" "\033<C-%c>"},
//{            '0', MetaMask|ControlMask,    10,          RANGE, "0" "\033<M-C-%c>"},
//{            'a', MetaMask|ControlMask,    26,          RANGE, "a" "\033<M-C-%c>"},
};

static void
output_string (rxvt_term *rt, const char *str)
{
  assert (rt && str);

  if (strncmp (str, "proto:", 6) == 0)
    rt->cmd_write ((unsigned char *)str + 6, strlen (str) - 6);
  else
    rt->tt_write ((unsigned char *)str, strlen (str));
}

static void
output_string_meta8 (rxvt_term *rt, unsigned int state, char *buf, int buflen)
{
  if (state & rt->ModMetaMask)
    {
#ifdef META8_OPTION
      if (rt->meta_char == 0x80)        /* set 8-bit on */
        {
          for (char *ch = buf; ch < buf + buflen; ch++)
            *ch |= 0x80;
        }
      else if (rt->meta_char == C0_ESC) /* escape prefix */
#endif
        {
          const unsigned char
            ch = C0_ESC;
          rt->tt_write (&ch, 1);
        }
    }

  rt->tt_write ((unsigned char *) buf, buflen);
}

static int
format_keyrange_string (const char *str, int keysym_offset, char *buf, int bufsize)
{
  int len = snprintf (buf, bufsize, str + 1, keysym_offset + str [0]);

  if (len >= bufsize)
    {
      fprintf (stderr, "buffer overflowed!\n");
      buf[bufsize - 1] = '\0';
    }
  else if (len < 0)
    {
      perror ("keyrange_translator()");
    }

  return len;
}

////////////////////////////////////////////////////////////////////////////////
// return: #bits of '1'
static int
bitcount (unsigned int n)
{
  int i;

  for (i = 0; n; ++i, n &= (n - 1))
    ;

  return i;
}

// return: priority_of_a - priority_of_b
static int
compare_priority (keysym_t *a, keysym_t *b)
{
  assert (a && b);

  // (the more '1's in state; the less range): the greater priority
  int ca = bitcount (a->state /* & OtherModMask */);
  int cb = bitcount (b->state /* & OtherModMask */);

  if (ca != cb)
    return ca - cb;
//else if (a->state != b->state) // this behavior is to be disscussed
//  return b->state - a->state;
  else
    return b->range - a->range;
}

////////////////////////////////////////////////////////////////////////////////
keyboard_manager::keyboard_manager ()
{
  keymap.reserve (256);
  hash [0] = 1;                 // hash[0] != 0 indicates uninitialized data
}

keyboard_manager::~keyboard_manager ()
{
  clear ();
}

void
keyboard_manager::clear ()
{
  keymap.clear ();
  hash [0] = 2;

  for (unsigned int i = 0; i < user_translations.size (); ++i)
    {
      free ((void *)user_translations [i]);
      user_translations [i] = 0;
    }

  for (unsigned int i = 0; i < user_keymap.size (); ++i)
    {
      delete user_keymap [i];
      user_keymap [i] = 0;
    }

  user_keymap.clear ();
  user_translations.clear ();
}

// a wrapper for register_keymap,
// so that outside codes don't have to know so much details.
//
// the string 'trans' is copied to an internal managed buffer,
// so the caller can free memory of 'trans' at any time.
void
keyboard_manager::register_user_translation (KeySym keysym, unsigned int state, const char *trans)
{
  assert (trans);

  keysym_t *key = new keysym_t;
  wchar_t *wc = rxvt_mbstowcs (trans);
  const char *translation = rxvt_wcstoutf8 (wc);
  free (wc);

  if (key && translation)
    {
      key->keysym = keysym;
      key->state  = state;
      key->range  = 1;
      key->str    = translation;
      key->type   = keysym_t::NORMAL;

      if (strncmp (translation, "list", 4) == 0 && translation [4])
        {
          char *middle = strchr  (translation + 5, translation [4]);
          char *suffix = strrchr (translation + 5, translation [4]);
          
          if (suffix && middle && suffix > middle + 1)
            {
              key->type  = keysym_t::LIST;
              key->range = suffix - middle - 1;

              strcpy (translation, translation + 4);
            }
          else
            {
              key->range = 1;
              rxvt_warn ("cannot parse list-type keysym '%s', treating as normal keysym.\n", translation);
            }
        }
      else

      user_keymap.push_back (key);
      user_translations.push_back (translation);
      register_keymap (key);
    }
  else
    {
      delete key;
      free ((void *)translation);
      rxvt_fatal ("out of memory, aborting.\n");
    }
}

void
keyboard_manager::register_keymap (keysym_t *key)
{
  assert (key);
  assert (key->range >= 1);

  if (keymap.size () == keymap.capacity ())
    keymap.reserve (keymap.size () * 2);

  keymap.push_back (key);
  hash[0] = 3;
}

void
keyboard_manager::register_done ()
{
  unsigned int i, n = sizeof (stock_keymap) / sizeof (keysym_t);

  if (keymap.back () != &stock_keymap[n - 1])
    for (i = 0; i < n; ++i)
      register_keymap (&stock_keymap[i]);

  purge_duplicate_keymap ();

  setup_hash ();
}

bool
keyboard_manager::dispatch (rxvt_term *term, KeySym keysym, unsigned int state)
{
  assert (hash[0] == 0 && "register_done() need to be called");

  if (state & term->ModMetaMask)
    state |= MetaMask;

  if (state & term->ModNumLockMask)
    state |= NumLockMask;

  if (!!(term->priv_modes & PrivMode_aplKP) != !!(state & ShiftMask))
    state |= AppKeypadMask;

  int index = find_keysym (keysym, state);

  if (index >= 0)
    {
      assert (term && keymap [index]);
      const keysym_t &key = *keymap [index];

      int keysym_offset = keysym - key.keysym;

      wchar_t *wc = rxvt_utf8towcs (key.str);
      char *str = rxvt_wcstombs (wc);
      // TODO: do translations, unescaping etc, here (allow \u escape etc.)
      free (wc);

      switch (key.type)
        {
         case keysym_t::NORMAL:
            output_string (term, str);
            break;

          case keysym_t::RANGE:
            {
              char buf[STRING_MAX];

              if (format_keyrange_string (str, keysym_offset, buf, sizeof (buf)) > 0)
                output_string (term, buf);
            }
            break;

          case keysym_t::RANGE_META8:
            {
              int len;
              char buf[STRING_MAX];

              len = format_keyrange_string (str, keysym_offset, buf, sizeof (buf));
              if (len > 0)
                output_string_meta8 (term, state, buf, len);
            }
            break;

          case keysym_t::LIST:
            {
              char buf[STRING_MAX];

              char *prefix, *middle, *suffix;

              prefix = str;
              middle = strchr  (prefix + 1, *prefix);
              suffix = strrchr (middle + 1, *prefix);

              memcpy (buf, prefix + 1, middle - prefix - 1);
              buf [middle - prefix - 1] = middle [keysym_offset + 1];
              strcpy (buf + (middle - prefix), suffix + 1);

              output_string (term, buf);
            }
            break;
        }

      free (str);

      return true;
    }
  else
    {
      // fprintf(stderr,"[%x:%x]",state,keysym);
      return false;
    }
}

// purge duplicate keymap entries
void keyboard_manager::purge_duplicate_keymap ()
{
  for (unsigned int i = 0; i < keymap.size (); ++i)
    {
      for (unsigned int j = 0; j < i; ++j)
        {
          if (keymap [i] == keymap [j])
            {
              while (keymap [i] == keymap.back ())
                keymap.pop_back ();

              if (i < keymap.size ())
                {
                  keymap[i] = keymap.back ();
                  keymap.pop_back ();
                }
              break;
            }
        }
    }
}

void
keyboard_manager::setup_hash ()
{
  unsigned int i, index, hashkey;
  vector <keysym_t *> sorted_keymap;
  uint16_t hash_budget_size[KEYSYM_HASH_BUDGETS];       // size of each budget
  uint16_t hash_budget_counter[KEYSYM_HASH_BUDGETS];    // #elements in each budget

  memset (hash_budget_size, 0, sizeof (hash_budget_size));
  memset (hash_budget_counter, 0, sizeof (hash_budget_counter));

  // count keysyms for corresponding hash budgets
  for (i = 0; i < keymap.size (); ++i)
    {
      assert (keymap [i]);
      hashkey = (keymap [i]->keysym & KEYSYM_HASH_MASK);
      ++hash_budget_size [hashkey];
    }

  // keysym A with range>1 is counted one more time for
  // every keysym B lies in its range
  for (i = 0; i < keymap.size (); ++i)
    {
      if (keymap[i]->range > 1)
        {
          for (int j = min (keymap [i]->range, KEYSYM_HASH_BUDGETS) - 1; j > 0; --j)
            {
              hashkey = ((keymap [i]->keysym + j) & KEYSYM_HASH_MASK);
              if (hash_budget_size [hashkey])
                ++hash_budget_size [hashkey];
            }
        }
    }

  // now we know the size of each budget
  // compute the index of each budget
  hash [0] = 0;
  for (index = 0, i = 1; i < KEYSYM_HASH_BUDGETS; ++i)
    {
      index += hash_budget_size [i - 1];
      hash[i] = (hash_budget_size [i] ? index : hash [i - 1]);
    }

  // and allocate just enough space
  //sorted_keymap.reserve (hash[i - 1] + hash_budget_size[i - 1]);
  sorted_keymap.insert (sorted_keymap.begin (), index + hash_budget_size [i - 1], 0);

  // fill in sorted_keymap
  // it is sorted in each budget
  for (i = 0; i < keymap.size (); ++i)
    {
      for (int j = min (keymap [i]->range, KEYSYM_HASH_BUDGETS) - 1; j >= 0; --j)
        {
          hashkey = ((keymap [i]->keysym + j) & KEYSYM_HASH_MASK);

          if (hash_budget_size [hashkey])
            {
              index = hash [hashkey] + hash_budget_counter [hashkey];

              while (index > hash [hashkey]
                     && compare_priority (keymap [i], sorted_keymap [index - 1]) > 0)
                {
                  sorted_keymap [index] = sorted_keymap [index - 1];
                  --index;
                }

              sorted_keymap [index] = keymap [i];
              ++hash_budget_counter [hashkey];
            }
        }
    }

  keymap.swap (sorted_keymap);

#if defined (DEBUG_STRICT) || defined (DEBUG_KEYBOARD)
  // check for invariants
  for (i = 0; i < KEYSYM_HASH_BUDGETS; ++i)
    {
      index = hash[i];
      for (int j = 0; j < hash_budget_size [i]; ++j)
        {
          if (keymap [index + j]->range == 1)
            assert (i == (keymap [index + j]->keysym & KEYSYM_HASH_MASK));

          if (j)
            assert (compare_priority (keymap [index + j - 1],
                    keymap [index + j]) >= 0);
        }
    }

  // this should be able to detect most possible bugs
  for (i = 0; i < sorted_keymap.size (); ++i)
    {
      keysym_t *a = sorted_keymap[i];
      for (int j = 0; j < a->range; ++j)
        {
          int index = find_keysym (a->keysym + j, a->state & OtherModMask);
          assert (index >= 0);
          keysym_t *b = keymap [index];
          assert (i == (signed) index ||        // the normally expected result
            (a->keysym + j) >= b->keysym && (a->keysym + j) <= (b->keysym + b->range) && compare_priority (a, b) <= 0); // is effectively the same
        }
    }
#endif
}

int
keyboard_manager::find_keysym (KeySym keysym, unsigned int state)
{
  int hashkey = keysym & KEYSYM_HASH_MASK;
  unsigned int index = hash [hashkey];

  for (; index < keymap.size (); ++index)
    {
      keysym_t *key = keymap [index];
      assert (key);

      if (key->keysym <= keysym && key->keysym + key->range > keysym
          // match only the specified bits in state and ignore others
          && (key->state & OtherModMask) == (key->state & state))
        return index;
      else if (key->keysym > keysym && key->range == 1)
        return -1;
    }

  return -1;
}

#endif /* KEYSYM_RESOURCE */
// vim:et:ts=2:sw=2
Revision:	1.4
Committed:	Sun Jan 16 18:57:03 2005 UTC (19 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.3:	+30 -30 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#include "../config.h"
2			#include "rxvt.h"
3			#include "keyboard.h"
4			#include "command.h"
5			#include <string.h>
6			#include <X11/X.h>
7
8			#ifdef KEYSYM_RESOURCE
9
10			////////////////////////////////////////////////////////////////////////////////
11			// default keycode translation map and keyevent handlers
12
13	root	1.2	keysym_t keyboard_manager::stock_keymap[] = {
14	root	1.1	/* examples */
15	root	1.2	/* keysym, state, range, handler, str */
16			//{XK_ISO_Left_Tab, 0, 1, NORMAL, "\033[Z"},
17			//{ 'a', 0, 26, RANGE_META8, "a" "%c"},
18			//{ 'a', ControlMask, 26, RANGE_META8, "" "%c"},
19			//{ XK_Left, 0, 4, LIST, "DACBZ" "\033[Z"},
20			//{ XK_Left, ShiftMask, 4, LIST, "dacbZ" "\033[Z"},
21			//{ XK_Left, ControlMask, 4, LIST, "dacbZ" "\033OZ"},
22			//{ XK_Tab, ControlMask, 1, NORMAL, "\033<C-Tab>"},
23			//{ XK_apostrophe, ControlMask, 1, NORMAL, "\033<C-'>"},
24			//{ XK_slash, ControlMask, 1, NORMAL, "\033<C-/>"},
25			//{ XK_semicolon, ControlMask, 1, NORMAL, "\033<C-;>"},
26			//{ XK_grave, ControlMask, 1, NORMAL, "\033<C-`>"},
27			//{ XK_comma, ControlMask, 1, NORMAL, "\033<C-\054>"},
28			//{ XK_Return, ControlMask, 1, NORMAL, "\033<C-Return>"},
29			//{ XK_Return, ShiftMask, 1, NORMAL, "\033<S-Return>"},
30			//{ ' ', ShiftMask, 1, NORMAL, "\033<S-Space>"},
31			//{ '.', ControlMask, 1, NORMAL, "\033<C-.>"},
32			//{ '0', ControlMask, 10, RANGE, "0" "\033<C-%c>"},
33			//{ '0', MetaMask\|ControlMask, 10, RANGE, "0" "\033<M-C-%c>"},
34			//{ 'a', MetaMask\|ControlMask, 26, RANGE, "a" "\033<M-C-%c>"},
35	root	1.1	};
36
37	root	1.2	static void
38			output_string (rxvt_term rt, const char str)
39	root	1.1	{
40			assert (rt && str);
41	root	1.2
42	root	1.1	if (strncmp (str, "proto:", 6) == 0)
43	root	1.2	rt->cmd_write ((unsigned char *)str + 6, strlen (str) - 6);
44	root	1.1	else
45	root	1.2	rt->tt_write ((unsigned char *)str, strlen (str));
46	root	1.1	}
47
48	root	1.2	static void
49			output_string_meta8 (rxvt_term rt, unsigned int state, char buf, int buflen)
50	root	1.1	{
51			if (state & rt->ModMetaMask)
52			{
53			#ifdef META8_OPTION
54	root	1.2	if (rt->meta_char == 0x80) /* set 8-bit on */
55	root	1.1	{
56			for (char *ch = buf; ch < buf + buflen; ch++)
57			*ch \|= 0x80;
58			}
59	root	1.2	else if (rt->meta_char == C0_ESC) /* escape prefix */
60	root	1.1	#endif
61			{
62	root	1.2	const unsigned char
63			ch = C0_ESC;
64	root	1.1	rt->tt_write (&ch, 1);
65			}
66			}
67
68	root	1.2	rt->tt_write ((unsigned char *) buf, buflen);
69	root	1.1	}
70
71	root	1.2	static int
72			format_keyrange_string (const char str, int keysym_offset, char buf, int bufsize)
73	root	1.1	{
74	root	1.2	int len = snprintf (buf, bufsize, str + 1, keysym_offset + str [0]);
75	root	1.1
76			if (len >= bufsize)
77			{
78			fprintf (stderr, "buffer overflowed!\n");
79	root	1.2	buf[bufsize - 1] = '\0';
80	root	1.1	}
81			else if (len < 0)
82			{
83	root	1.2	perror ("keyrange_translator()");
84	root	1.1	}
85
86			return len;
87			}
88
89			////////////////////////////////////////////////////////////////////////////////
90			// return: #bits of '1'
91	root	1.2	static int
92	root	1.1	bitcount (unsigned int n)
93			{
94			int i;
95	root	1.2
96			for (i = 0; n; ++i, n &= (n - 1))
97			;
98
99	root	1.1	return i;
100			}
101
102			// return: priority_of_a - priority_of_b
103	root	1.2	static int
104	root	1.1	compare_priority (keysym_t a, keysym_t b)
105			{
106			assert (a && b);
107
108			// (the more '1's in state; the less range): the greater priority
109	root	1.2	int ca = bitcount (a->state /* & OtherModMask */);
110			int cb = bitcount (b->state /* & OtherModMask */);
111
112	root	1.1	if (ca != cb)
113			return ca - cb;
114			//else if (a->state != b->state) // this behavior is to be disscussed
115			// return b->state - a->state;
116			else
117			return b->range - a->range;
118			}
119
120			////////////////////////////////////////////////////////////////////////////////
121	root	1.2	keyboard_manager::keyboard_manager ()
122	root	1.1	{
123	root	1.2	keymap.reserve (256);
124	root	1.4	hash [0] = 1; // hash[0] != 0 indicates uninitialized data
125	root	1.1	}
126
127			keyboard_manager::~keyboard_manager ()
128			{
129			clear ();
130			}
131
132			void
133			keyboard_manager::clear ()
134			{
135	root	1.2	keymap.clear ();
136			hash [0] = 2;
137	root	1.1
138	root	1.2	for (unsigned int i = 0; i < user_translations.size (); ++i)
139	root	1.1	{
140	root	1.2	free ((void *)user_translations [i]);
141			user_translations [i] = 0;
142	root	1.1	}
143
144	root	1.2	for (unsigned int i = 0; i < user_keymap.size (); ++i)
145	root	1.1	{
146	root	1.2	delete user_keymap [i];
147			user_keymap [i] = 0;
148	root	1.1	}
149
150	root	1.2	user_keymap.clear ();
151			user_translations.clear ();
152	root	1.1	}
153
154			// a wrapper for register_keymap,
155			// so that outside codes don't have to know so much details.
156			//
157			// the string 'trans' is copied to an internal managed buffer,
158			// so the caller can free memory of 'trans' at any time.
159			void
160	root	1.2	keyboard_manager::register_user_translation (KeySym keysym, unsigned int state, const char *trans)
161	root	1.1	{
162	root	1.2	assert (trans);
163	root	1.1
164			keysym_t *key = new keysym_t;
165	root	1.2	wchar_t *wc = rxvt_mbstowcs (trans);
166			const char *translation = rxvt_wcstoutf8 (wc);
167			free (wc);
168	root	1.1
169	root	1.2	if (key && translation)
170	root	1.1	{
171			key->keysym = keysym;
172	root	1.2	key->state = state;
173			key->range = 1;
174			key->str = translation;
175			key->type = keysym_t::NORMAL;
176
177			if (strncmp (translation, "list", 4) == 0 && translation [4])
178			{
179			char *middle = strchr (translation + 5, translation [4]);
180			char *suffix = strrchr (translation + 5, translation [4]);
181
182			if (suffix && middle && suffix > middle + 1)
183			{
184			key->type = keysym_t::LIST;
185			key->range = suffix - middle - 1;
186	root	1.1
187	root	1.2	strcpy (translation, translation + 4);
188			}
189			else
190			{
191			key->range = 1;
192			rxvt_warn ("cannot parse list-type keysym '%s', treating as normal keysym.\n", translation);
193			}
194	root	1.1	}
195	root	1.2	else
196	root	1.1
197	root	1.2	user_keymap.push_back (key);
198			user_translations.push_back (translation);
199	root	1.1	register_keymap (key);
200			}
201			else
202			{
203			delete key;
204	root	1.2	free ((void *)translation);
205	root	1.1	rxvt_fatal ("out of memory, aborting.\n");
206			}
207			}
208
209			void
210			keyboard_manager::register_keymap (keysym_t *key)
211			{
212			assert (key);
213			assert (key->range >= 1);
214
215	root	1.2	if (keymap.size () == keymap.capacity ())
216			keymap.reserve (keymap.size () * 2);
217	root	1.1
218	root	1.2	keymap.push_back (key);
219			hash[0] = 3;
220	root	1.1	}
221
222			void
223			keyboard_manager::register_done ()
224			{
225	root	1.2	unsigned int i, n = sizeof (stock_keymap) / sizeof (keysym_t);
226	root	1.1
227	root	1.2	if (keymap.back () != &stock_keymap[n - 1])
228			for (i = 0; i < n; ++i)
229			register_keymap (&stock_keymap[i]);
230	root	1.1
231			purge_duplicate_keymap ();
232
233			setup_hash ();
234			}
235
236	root	1.2	bool
237			keyboard_manager::dispatch (rxvt_term *term, KeySym keysym, unsigned int state)
238	root	1.1	{
239	root	1.2	assert (hash[0] == 0 && "register_done() need to be called");
240	root	1.1
241	root	1.3	if (state & term->ModMetaMask)
242			state \|= MetaMask;
243
244			if (state & term->ModNumLockMask)
245			state \|= NumLockMask;
246
247			if (!!(term->priv_modes & PrivMode_aplKP) != !!(state & ShiftMask))
248			state \|= AppKeypadMask;
249
250	root	1.1	int index = find_keysym (keysym, state);
251
252			if (index >= 0)
253			{
254	root	1.2	assert (term && keymap [index]);
255			const keysym_t &key = *keymap [index];
256
257			int keysym_offset = keysym - key.keysym;
258
259			wchar_t *wc = rxvt_utf8towcs (key.str);
260			char *str = rxvt_wcstombs (wc);
261			// TODO: do translations, unescaping etc, here (allow \u escape etc.)
262			free (wc);
263
264			switch (key.type)
265			{
266			case keysym_t::NORMAL:
267			output_string (term, str);
268			break;
269
270			case keysym_t::RANGE:
271			{
272			char buf[STRING_MAX];
273
274			if (format_keyrange_string (str, keysym_offset, buf, sizeof (buf)) > 0)
275			output_string (term, buf);
276			}
277			break;
278
279			case keysym_t::RANGE_META8:
280			{
281			int len;
282			char buf[STRING_MAX];
283
284			len = format_keyrange_string (str, keysym_offset, buf, sizeof (buf));
285			if (len > 0)
286			output_string_meta8 (term, state, buf, len);
287			}
288			break;
289
290			case keysym_t::LIST:
291			{
292			char buf[STRING_MAX];
293
294			char prefix, middle, *suffix;
295
296			prefix = str;
297			middle = strchr (prefix + 1, *prefix);
298			suffix = strrchr (middle + 1, *prefix);
299
300			memcpy (buf, prefix + 1, middle - prefix - 1);
301			buf [middle - prefix - 1] = middle [keysym_offset + 1];
302			strcpy (buf + (middle - prefix), suffix + 1);
303
304			output_string (term, buf);
305			}
306			break;
307			}
308
309			free (str);
310
311	root	1.1	return true;
312			}
313			else
314	root	1.2	{
315			// fprintf(stderr,"[%x:%x]",state,keysym);
316			return false;
317			}
318	root	1.1	}
319
320	root	1.2	// purge duplicate keymap entries
321			void keyboard_manager::purge_duplicate_keymap ()
322	root	1.1	{
323	root	1.2	for (unsigned int i = 0; i < keymap.size (); ++i)
324	root	1.1	{
325			for (unsigned int j = 0; j < i; ++j)
326			{
327	root	1.4	if (keymap [i] == keymap [j])
328	root	1.1	{
329	root	1.4	while (keymap [i] == keymap.back ())
330	root	1.2	keymap.pop_back ();
331
332			if (i < keymap.size ())
333	root	1.1	{
334	root	1.2	keymap[i] = keymap.back ();
335			keymap.pop_back ();
336	root	1.1	}
337			break;
338			}
339			}
340			}
341			}
342
343			void
344			keyboard_manager::setup_hash ()
345			{
346			unsigned int i, index, hashkey;
347	root	1.2	vector <keysym_t *> sorted_keymap;
348			uint16_t hash_budget_size[KEYSYM_HASH_BUDGETS]; // size of each budget
349			uint16_t hash_budget_counter[KEYSYM_HASH_BUDGETS]; // #elements in each budget
350	root	1.1
351			memset (hash_budget_size, 0, sizeof (hash_budget_size));
352			memset (hash_budget_counter, 0, sizeof (hash_budget_counter));
353
354			// count keysyms for corresponding hash budgets
355	root	1.2	for (i = 0; i < keymap.size (); ++i)
356	root	1.1	{
357	root	1.4	assert (keymap [i]);
358			hashkey = (keymap [i]->keysym & KEYSYM_HASH_MASK);
359			++hash_budget_size [hashkey];
360	root	1.1	}
361
362			// keysym A with range>1 is counted one more time for
363			// every keysym B lies in its range
364	root	1.2	for (i = 0; i < keymap.size (); ++i)
365	root	1.1	{
366	root	1.2	if (keymap[i]->range > 1)
367	root	1.1	{
368	root	1.4	for (int j = min (keymap [i]->range, KEYSYM_HASH_BUDGETS) - 1; j > 0; --j)
369	root	1.1	{
370	root	1.4	hashkey = ((keymap [i]->keysym + j) & KEYSYM_HASH_MASK);
371			if (hash_budget_size [hashkey])
372			++hash_budget_size [hashkey];
373	root	1.1	}
374			}
375			}
376
377			// now we know the size of each budget
378			// compute the index of each budget
379	root	1.4	hash [0] = 0;
380	root	1.2	for (index = 0, i = 1; i < KEYSYM_HASH_BUDGETS; ++i)
381	root	1.1	{
382	root	1.4	index += hash_budget_size [i - 1];
383			hash[i] = (hash_budget_size [i] ? index : hash [i - 1]);
384	root	1.1	}
385	root	1.2
386	root	1.1	// and allocate just enough space
387	root	1.2	//sorted_keymap.reserve (hash[i - 1] + hash_budget_size[i - 1]);
388	root	1.4	sorted_keymap.insert (sorted_keymap.begin (), index + hash_budget_size [i - 1], 0);
389	root	1.1
390			// fill in sorted_keymap
391			// it is sorted in each budget
392	root	1.2	for (i = 0; i < keymap.size (); ++i)
393	root	1.1	{
394	root	1.4	for (int j = min (keymap [i]->range, KEYSYM_HASH_BUDGETS) - 1; j >= 0; --j)
395	root	1.1	{
396	root	1.4	hashkey = ((keymap [i]->keysym + j) & KEYSYM_HASH_MASK);
397	root	1.2
398	root	1.4	if (hash_budget_size [hashkey])
399	root	1.1	{
400	root	1.4	index = hash [hashkey] + hash_budget_counter [hashkey];
401	root	1.2
402	root	1.4	while (index > hash [hashkey]
403			&& compare_priority (keymap [i], sorted_keymap [index - 1]) > 0)
404	root	1.1	{
405	root	1.4	sorted_keymap [index] = sorted_keymap [index - 1];
406	root	1.1	--index;
407			}
408	root	1.2
409	root	1.4	sorted_keymap [index] = keymap [i];
410			++hash_budget_counter [hashkey];
411	root	1.1	}
412			}
413			}
414
415	root	1.2	keymap.swap (sorted_keymap);
416	root	1.1
417			#if defined (DEBUG_STRICT) \|\| defined (DEBUG_KEYBOARD)
418			// check for invariants
419			for (i = 0; i < KEYSYM_HASH_BUDGETS; ++i)
420			{
421	root	1.2	index = hash[i];
422	root	1.4	for (int j = 0; j < hash_budget_size [i]; ++j)
423	root	1.1	{
424	root	1.4	if (keymap [index + j]->range == 1)
425			assert (i == (keymap [index + j]->keysym & KEYSYM_HASH_MASK));
426	root	1.2
427	root	1.1	if (j)
428	root	1.4	assert (compare_priority (keymap [index + j - 1],
429			keymap [index + j]) >= 0);
430	root	1.1	}
431			}
432
433			// this should be able to detect most possible bugs
434			for (i = 0; i < sorted_keymap.size (); ++i)
435			{
436			keysym_t *a = sorted_keymap[i];
437			for (int j = 0; j < a->range; ++j)
438			{
439	root	1.2	int index = find_keysym (a->keysym + j, a->state & OtherModMask);
440	root	1.1	assert (index >= 0);
441	root	1.4	keysym_t *b = keymap [index];
442	root	1.2	assert (i == (signed) index \|\| // the normally expected result
443			(a->keysym + j) >= b->keysym && (a->keysym + j) <= (b->keysym + b->range) && compare_priority (a, b) <= 0); // is effectively the same
444	root	1.1	}
445			}
446			#endif
447			}
448
449			int
450			keyboard_manager::find_keysym (KeySym keysym, unsigned int state)
451			{
452	root	1.2	int hashkey = keysym & KEYSYM_HASH_MASK;
453			unsigned int index = hash [hashkey];
454	root	1.1
455	root	1.2	for (; index < keymap.size (); ++index)
456	root	1.1	{
457	root	1.4	keysym_t *key = keymap [index];
458	root	1.1	assert (key);
459	root	1.2
460			if (key->keysym <= keysym && key->keysym + key->range > keysym
461	root	1.1	// match only the specified bits in state and ignore others
462	root	1.2	&& (key->state & OtherModMask) == (key->state & state))
463			return index;
464			else if (key->keysym > keysym && key->range == 1)
465	root	1.1	return -1;
466			}
467
468			return -1;
469			}
470
471			#endif /* KEYSYM_RESOURCE */
472			// vim:et:ts=2:sw=2