rxvt-unicode/src/keyboard.C

#include "../config.h"
#include "rxvt.h"

#ifdef KEYSYM_RESOURCE

#include <cstring>

#include "keyboard.h"
#include "command.h"

////////////////////////////////////////////////////////////////////////////////
// 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,      keysym_t::NORMAL,           "\033[Z"},
//{            'a',                    0,    26, keysym_t::RANGE_META8,           "a" "%c"},
//{            'a',          ControlMask,    26, keysym_t::RANGE_META8,          "" "%c"},
//{        XK_Left,                    0,     4,        keysym_t::LIST,     ".\033[.DACB."},
//{        XK_Left,            ShiftMask,     4,        keysym_t::LIST,     ".\033[.dacb."},
//{        XK_Left,          ControlMask,     4,        keysym_t::LIST,     ".\033O.dacb."},
//{         XK_Tab,          ControlMask,     1,      keysym_t::NORMAL,      "\033<C-Tab>"},
//{  XK_apostrophe,          ControlMask,     1,      keysym_t::NORMAL,        "\033<C-'>"},
//{       XK_slash,          ControlMask,     1,      keysym_t::NORMAL,        "\033<C-/>"},
//{   XK_semicolon,          ControlMask,     1,      keysym_t::NORMAL,        "\033<C-;>"},
//{       XK_grave,          ControlMask,     1,      keysym_t::NORMAL,        "\033<C-`>"},
//{       XK_comma,          ControlMask,     1,      keysym_t::NORMAL,     "\033<C-\054>"},
//{      XK_Return,          ControlMask,     1,      keysym_t::NORMAL,   "\033<C-Return>"},
//{      XK_Return,            ShiftMask,     1,      keysym_t::NORMAL,   "\033<S-Return>"},
//{            ' ',            ShiftMask,     1,      keysym_t::NORMAL,    "\033<S-Space>"},
//{            '.',          ControlMask,     1,      keysym_t::NORMAL,        "\033<C-.>"},
//{            '0',          ControlMask,    10,       keysym_t::RANGE,   "0" "\033<C-%c>"},
//{            '0', MetaMask|ControlMask,    10,       keysym_t::RANGE, "0" "\033<M-C-%c>"},
//{            'a', MetaMask|ControlMask,    26,       keysym_t::RANGE, "a" "\033<M-C-%c>"},
};

static void
output_string (rxvt_term *rt, const char *str)
{
  if (strncmp (str, "command:", 8) == 0)
    rt->cmd_write ((unsigned char *)str + 8, strlen (str) - 8);
  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)
{
  size_t len = snprintf (buf, bufsize, str + 1, keysym_offset + str [0]);

  if (len >= (size_t)bufsize)
    {
      rxvt_warn ("format_keyrange_string: formatting failed, ignoring key.\n");
      *buf = 0;
    }

  return len;
}

////////////////////////////////////////////////////////////////////////////////
// return: #bits of '1'
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 3)
# define bitcount(n) (__extension__ ({ uint32_t n__ = (n); __builtin_popcount (n); }))
#else
static int
bitcount (uint16_t n)
{
  int i;

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

  return i;
}
#endif

// return: priority_of_a - priority_of_b
static int
compare_priority (keysym_t *a, keysym_t *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)
{
  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
            rxvt_warn ("cannot parse list-type keysym '%s', treating as normal keysym.\n", translation);
        }

      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)
{
  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 (state & term->ModLevel3Mask)  state |= Level3Mask;

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

  int index = find_keysym (keysym, state);

  if (index >= 0)
    {
      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 (some) 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
    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));

  // determine hash bucket size
  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;
        ++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] = index;
    }

  // and allocate just enough space
  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;

        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);

          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 or a closer match
        }
    }
#endif
}

int
keyboard_manager::find_keysym (KeySym keysym, unsigned int state)
{
  int hashkey = keysym & KEYSYM_HASH_MASK;
  unsigned int index = hash [hashkey];
  unsigned int end = hashkey < KEYSYM_HASH_BUDGETS - 1
                     ? hash [hashkey + 1] 
                     : keymap.size ();

  for (; index < end; ++index)
    {
      keysym_t *key = keymap [index];

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

  return -1;
}

#endif /* KEYSYM_RESOURCE */
// vim:et:ts=2:sw=2
Revision:	1.11
Committed:	Sun Feb 6 15:18:01 2005 UTC (19 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-5_0
Changes since 1.10:	+31 -52 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#include "../config.h"
2			#include "rxvt.h"
3	root	1.7
4			#ifdef KEYSYM_RESOURCE
5
6			#include <cstring>
7
8	root	1.1	#include "keyboard.h"
9			#include "command.h"
10
11			////////////////////////////////////////////////////////////////////////////////
12			// default keycode translation map and keyevent handlers
13
14	root	1.2	keysym_t keyboard_manager::stock_keymap[] = {
15	root	1.1	/* examples */
16	root	1.10	/* keysym, state, range, handler, str */
17			//{XK_ISO_Left_Tab, 0, 1, keysym_t::NORMAL, "\033[Z"},
18			//{ 'a', 0, 26, keysym_t::RANGE_META8, "a" "%c"},
19			//{ 'a', ControlMask, 26, keysym_t::RANGE_META8, "" "%c"},
20			//{ XK_Left, 0, 4, keysym_t::LIST, ".\033[.DACB."},
21			//{ XK_Left, ShiftMask, 4, keysym_t::LIST, ".\033[.dacb."},
22			//{ XK_Left, ControlMask, 4, keysym_t::LIST, ".\033O.dacb."},
23			//{ XK_Tab, ControlMask, 1, keysym_t::NORMAL, "\033<C-Tab>"},
24			//{ XK_apostrophe, ControlMask, 1, keysym_t::NORMAL, "\033<C-'>"},
25			//{ XK_slash, ControlMask, 1, keysym_t::NORMAL, "\033<C-/>"},
26			//{ XK_semicolon, ControlMask, 1, keysym_t::NORMAL, "\033<C-;>"},
27			//{ XK_grave, ControlMask, 1, keysym_t::NORMAL, "\033<C-`>"},
28			//{ XK_comma, ControlMask, 1, keysym_t::NORMAL, "\033<C-\054>"},
29			//{ XK_Return, ControlMask, 1, keysym_t::NORMAL, "\033<C-Return>"},
30			//{ XK_Return, ShiftMask, 1, keysym_t::NORMAL, "\033<S-Return>"},
31			//{ ' ', ShiftMask, 1, keysym_t::NORMAL, "\033<S-Space>"},
32			//{ '.', ControlMask, 1, keysym_t::NORMAL, "\033<C-.>"},
33			//{ '0', ControlMask, 10, keysym_t::RANGE, "0" "\033<C-%c>"},
34			//{ '0', MetaMask\|ControlMask, 10, keysym_t::RANGE, "0" "\033<M-C-%c>"},
35			//{ 'a', MetaMask\|ControlMask, 26, keysym_t::RANGE, "a" "\033<M-C-%c>"},
36	root	1.1	};
37
38	root	1.2	static void
39			output_string (rxvt_term rt, const char str)
40	root	1.1	{
41	root	1.10	if (strncmp (str, "command:", 8) == 0)
42			rt->cmd_write ((unsigned char *)str + 8, strlen (str) - 8);
43	root	1.1	else
44	root	1.2	rt->tt_write ((unsigned char *)str, strlen (str));
45	root	1.1	}
46
47	root	1.2	static void
48			output_string_meta8 (rxvt_term rt, unsigned int state, char buf, int buflen)
49	root	1.1	{
50			if (state & rt->ModMetaMask)
51			{
52			#ifdef META8_OPTION
53	root	1.2	if (rt->meta_char == 0x80) /* set 8-bit on */
54	root	1.1	{
55			for (char *ch = buf; ch < buf + buflen; ch++)
56			*ch \|= 0x80;
57			}
58	root	1.2	else if (rt->meta_char == C0_ESC) /* escape prefix */
59	root	1.1	#endif
60			{
61	root	1.5	const unsigned char ch = C0_ESC;
62	root	1.1	rt->tt_write (&ch, 1);
63			}
64			}
65
66	root	1.2	rt->tt_write ((unsigned char *) buf, buflen);
67	root	1.1	}
68
69	root	1.2	static int
70			format_keyrange_string (const char str, int keysym_offset, char buf, int bufsize)
71	root	1.1	{
72	root	1.7	size_t len = snprintf (buf, bufsize, str + 1, keysym_offset + str [0]);
73	root	1.1
74	root	1.7	if (len >= (size_t)bufsize)
75	root	1.1	{
76	root	1.7	rxvt_warn ("format_keyrange_string: formatting failed, ignoring key.\n");
77	root	1.5	*buf = 0;
78	root	1.1	}
79
80			return len;
81			}
82
83			////////////////////////////////////////////////////////////////////////////////
84			// return: #bits of '1'
85	root	1.7	#if __GNUC__ > 3 \|\| (__GNUC__ == 3 && __GNUC_MINOR__ > 3)
86			# define bitcount(n) (__extension__ ({ uint32_t n__ = (n); __builtin_popcount (n); }))
87			#else
88	root	1.2	static int
89	root	1.7	bitcount (uint16_t n)
90	root	1.1	{
91			int i;
92	root	1.2
93	root	1.7	for (i = 0; n; ++i, n &= n - 1)
94	root	1.2	;
95
96	root	1.1	return i;
97			}
98	root	1.7	#endif
99	root	1.1
100			// return: priority_of_a - priority_of_b
101	root	1.2	static int
102	root	1.1	compare_priority (keysym_t a, keysym_t b)
103			{
104			// (the more '1's in state; the less range): the greater priority
105	root	1.2	int ca = bitcount (a->state /* & OtherModMask */);
106			int cb = bitcount (b->state /* & OtherModMask */);
107
108	root	1.1	if (ca != cb)
109			return ca - cb;
110			//else if (a->state != b->state) // this behavior is to be disscussed
111			// return b->state - a->state;
112			else
113			return b->range - a->range;
114			}
115
116			////////////////////////////////////////////////////////////////////////////////
117	root	1.2	keyboard_manager::keyboard_manager ()
118	root	1.1	{
119	root	1.2	keymap.reserve (256);
120	root	1.4	hash [0] = 1; // hash[0] != 0 indicates uninitialized data
121	root	1.1	}
122
123			keyboard_manager::~keyboard_manager ()
124			{
125			clear ();
126			}
127
128			void
129			keyboard_manager::clear ()
130			{
131	root	1.2	keymap.clear ();
132			hash [0] = 2;
133	root	1.1
134	root	1.2	for (unsigned int i = 0; i < user_translations.size (); ++i)
135	root	1.1	{
136	root	1.2	free ((void *)user_translations [i]);
137			user_translations [i] = 0;
138	root	1.1	}
139
140	root	1.2	for (unsigned int i = 0; i < user_keymap.size (); ++i)
141	root	1.1	{
142	root	1.2	delete user_keymap [i];
143			user_keymap [i] = 0;
144	root	1.1	}
145
146	root	1.2	user_keymap.clear ();
147			user_translations.clear ();
148	root	1.1	}
149
150			// a wrapper for register_keymap,
151			// so that outside codes don't have to know so much details.
152			//
153			// the string 'trans' is copied to an internal managed buffer,
154			// so the caller can free memory of 'trans' at any time.
155			void
156	root	1.2	keyboard_manager::register_user_translation (KeySym keysym, unsigned int state, const char *trans)
157	root	1.1	{
158			keysym_t *key = new keysym_t;
159	root	1.2	wchar_t *wc = rxvt_mbstowcs (trans);
160			const char *translation = rxvt_wcstoutf8 (wc);
161			free (wc);
162	root	1.1
163	root	1.2	if (key && translation)
164	root	1.1	{
165			key->keysym = keysym;
166	root	1.2	key->state = state;
167			key->range = 1;
168			key->str = translation;
169			key->type = keysym_t::NORMAL;
170
171			if (strncmp (translation, "list", 4) == 0 && translation [4])
172			{
173			char *middle = strchr (translation + 5, translation [4]);
174			char *suffix = strrchr (translation + 5, translation [4]);
175
176			if (suffix && middle && suffix > middle + 1)
177			{
178			key->type = keysym_t::LIST;
179			key->range = suffix - middle - 1;
180	root	1.1
181	root	1.2	strcpy (translation, translation + 4);
182			}
183			else
184	root	1.7	rxvt_warn ("cannot parse list-type keysym '%s', treating as normal keysym.\n", translation);
185	root	1.1	}
186
187	root	1.2	user_keymap.push_back (key);
188			user_translations.push_back (translation);
189	root	1.1	register_keymap (key);
190			}
191			else
192			{
193			delete key;
194	root	1.2	free ((void *)translation);
195	root	1.1	rxvt_fatal ("out of memory, aborting.\n");
196			}
197			}
198
199			void
200			keyboard_manager::register_keymap (keysym_t *key)
201			{
202	root	1.2	if (keymap.size () == keymap.capacity ())
203			keymap.reserve (keymap.size () * 2);
204	root	1.1
205	root	1.2	keymap.push_back (key);
206			hash[0] = 3;
207	root	1.1	}
208
209			void
210			keyboard_manager::register_done ()
211			{
212	root	1.2	unsigned int i, n = sizeof (stock_keymap) / sizeof (keysym_t);
213	root	1.1
214	root	1.2	if (keymap.back () != &stock_keymap[n - 1])
215			for (i = 0; i < n; ++i)
216			register_keymap (&stock_keymap[i]);
217	root	1.1
218			purge_duplicate_keymap ();
219
220			setup_hash ();
221			}
222
223	root	1.2	bool
224			keyboard_manager::dispatch (rxvt_term *term, KeySym keysym, unsigned int state)
225	root	1.1	{
226	root	1.2	assert (hash[0] == 0 && "register_done() need to be called");
227	root	1.1
228	root	1.6	if (state & term->ModMetaMask) state \|= MetaMask;
229			if (state & term->ModNumLockMask) state \|= NumLockMask;
230			if (state & term->ModLevel3Mask) state \|= Level3Mask;
231	root	1.3
232			if (!!(term->priv_modes & PrivMode_aplKP) != !!(state & ShiftMask))
233			state \|= AppKeypadMask;
234
235	root	1.1	int index = find_keysym (keysym, state);
236
237			if (index >= 0)
238			{
239	root	1.2	const keysym_t &key = *keymap [index];
240
241			int keysym_offset = keysym - key.keysym;
242
243			wchar_t *wc = rxvt_utf8towcs (key.str);
244			char *str = rxvt_wcstombs (wc);
245	root	1.11	// TODO: do (some) translations, unescaping etc, here (allow \u escape etc.)
246	root	1.2	free (wc);
247
248			switch (key.type)
249			{
250			case keysym_t::NORMAL:
251			output_string (term, str);
252			break;
253
254			case keysym_t::RANGE:
255			{
256			char buf[STRING_MAX];
257
258			if (format_keyrange_string (str, keysym_offset, buf, sizeof (buf)) > 0)
259			output_string (term, buf);
260			}
261			break;
262
263			case keysym_t::RANGE_META8:
264			{
265			int len;
266			char buf[STRING_MAX];
267
268			len = format_keyrange_string (str, keysym_offset, buf, sizeof (buf));
269			if (len > 0)
270			output_string_meta8 (term, state, buf, len);
271			}
272			break;
273
274			case keysym_t::LIST:
275			{
276			char buf[STRING_MAX];
277
278			char prefix, middle, *suffix;
279
280			prefix = str;
281			middle = strchr (prefix + 1, *prefix);
282			suffix = strrchr (middle + 1, *prefix);
283
284			memcpy (buf, prefix + 1, middle - prefix - 1);
285			buf [middle - prefix - 1] = middle [keysym_offset + 1];
286			strcpy (buf + (middle - prefix), suffix + 1);
287
288			output_string (term, buf);
289			}
290			break;
291			}
292
293			free (str);
294
295	root	1.1	return true;
296			}
297			else
298	root	1.11	return false;
299	root	1.1	}
300
301	root	1.2	// purge duplicate keymap entries
302			void keyboard_manager::purge_duplicate_keymap ()
303	root	1.1	{
304	root	1.2	for (unsigned int i = 0; i < keymap.size (); ++i)
305	root	1.1	{
306			for (unsigned int j = 0; j < i; ++j)
307			{
308	root	1.4	if (keymap [i] == keymap [j])
309	root	1.1	{
310	root	1.4	while (keymap [i] == keymap.back ())
311	root	1.2	keymap.pop_back ();
312
313			if (i < keymap.size ())
314	root	1.1	{
315	root	1.2	keymap[i] = keymap.back ();
316			keymap.pop_back ();
317	root	1.1	}
318	root	1.11
319	root	1.1	break;
320			}
321			}
322			}
323			}
324
325			void
326			keyboard_manager::setup_hash ()
327			{
328			unsigned int i, index, hashkey;
329	root	1.2	vector <keysym_t *> sorted_keymap;
330			uint16_t hash_budget_size[KEYSYM_HASH_BUDGETS]; // size of each budget
331			uint16_t hash_budget_counter[KEYSYM_HASH_BUDGETS]; // #elements in each budget
332	root	1.1
333			memset (hash_budget_size, 0, sizeof (hash_budget_size));
334			memset (hash_budget_counter, 0, sizeof (hash_budget_counter));
335
336	root	1.11	// determine hash bucket size
337	root	1.2	for (i = 0; i < keymap.size (); ++i)
338	root	1.11	for (int j = min (keymap [i]->range, KEYSYM_HASH_BUDGETS) - 1; j >= 0; --j)
339			{
340			hashkey = (keymap [i]->keysym + j) & KEYSYM_HASH_MASK;
341			++hash_budget_size [hashkey];
342			}
343	root	1.1
344			// now we know the size of each budget
345			// compute the index of each budget
346	root	1.4	hash [0] = 0;
347	root	1.2	for (index = 0, i = 1; i < KEYSYM_HASH_BUDGETS; ++i)
348	root	1.1	{
349	root	1.4	index += hash_budget_size [i - 1];
350	root	1.11	hash [i] = index;
351	root	1.1	}
352	root	1.2
353	root	1.1	// and allocate just enough space
354	root	1.4	sorted_keymap.insert (sorted_keymap.begin (), index + hash_budget_size [i - 1], 0);
355	root	1.1
356			// fill in sorted_keymap
357			// it is sorted in each budget
358	root	1.2	for (i = 0; i < keymap.size (); ++i)
359	root	1.11	for (int j = min (keymap [i]->range, KEYSYM_HASH_BUDGETS) - 1; j >= 0; --j)
360			{
361			hashkey = (keymap [i]->keysym + j) & KEYSYM_HASH_MASK;
362
363			index = hash [hashkey] + hash_budget_counter [hashkey];
364
365			while (index > hash [hashkey]
366			&& compare_priority (keymap [i], sorted_keymap [index - 1]) > 0)
367			{
368			sorted_keymap [index] = sorted_keymap [index - 1];
369			--index;
370			}
371
372			sorted_keymap [index] = keymap [i];
373			++hash_budget_counter [hashkey];
374			}
375	root	1.1
376	root	1.2	keymap.swap (sorted_keymap);
377	root	1.1
378			#if defined (DEBUG_STRICT) \|\| defined (DEBUG_KEYBOARD)
379			// check for invariants
380			for (i = 0; i < KEYSYM_HASH_BUDGETS; ++i)
381			{
382	root	1.2	index = hash[i];
383	root	1.4	for (int j = 0; j < hash_budget_size [i]; ++j)
384	root	1.1	{
385	root	1.4	if (keymap [index + j]->range == 1)
386			assert (i == (keymap [index + j]->keysym & KEYSYM_HASH_MASK));
387	root	1.2
388	root	1.1	if (j)
389	root	1.4	assert (compare_priority (keymap [index + j - 1],
390			keymap [index + j]) >= 0);
391	root	1.1	}
392			}
393
394			// this should be able to detect most possible bugs
395			for (i = 0; i < sorted_keymap.size (); ++i)
396			{
397			keysym_t *a = sorted_keymap[i];
398			for (int j = 0; j < a->range; ++j)
399			{
400	root	1.7	int index = find_keysym (a->keysym + j, a->state);
401	root	1.6
402	root	1.1	assert (index >= 0);
403	root	1.4	keysym_t *b = keymap [index];
404	root	1.2	assert (i == (signed) index \|\| // the normally expected result
405	root	1.10	(a->keysym + j) >= b->keysym && (a->keysym + j) <= (b->keysym + b->range) && compare_priority (a, b) <= 0); // is effectively the same or a closer match
406	root	1.1	}
407			}
408			#endif
409			}
410
411			int
412			keyboard_manager::find_keysym (KeySym keysym, unsigned int state)
413			{
414	root	1.2	int hashkey = keysym & KEYSYM_HASH_MASK;
415			unsigned int index = hash [hashkey];
416	root	1.11	unsigned int end = hashkey < KEYSYM_HASH_BUDGETS - 1
417			? hash [hashkey + 1]
418			: keymap.size ();
419	root	1.1
420	root	1.11	for (; index < end; ++index)
421	root	1.1	{
422	root	1.4	keysym_t *key = keymap [index];
423	root	1.2
424	root	1.11	if (key->keysym <= keysym && keysym < key->keysym + key->range
425	root	1.1	// match only the specified bits in state and ignore others
426	root	1.7	&& (key->state & state) == key->state)
427	root	1.2	return index;
428	root	1.1	}
429
430			return -1;
431			}
432
433			#endif /* KEYSYM_RESOURCE */
434			// vim:et:ts=2:sw=2