summaryrefslogtreecommitdiff
path: root/src/input.c
blob: 0679b1ed6214eb72e5a13486ad927b238cde47b5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
/* Read kdb input from the user.
 * Copyright (C) 2000, 2001 Shawn Betts
 *
 * This file is part of ratpoison.
 *
 * ratpoison 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, or (at your option)
 * any later version.
 * 
 * ratpoison 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 software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA
 */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/Xutil.h>

#include "ratpoison.h"

/* Variables to keep track of input history. */
static char *input_history[INPUT_MAX_HISTORY];
static int input_num_history_entries = 0;

/* Convert an X11 modifier mask to the rp modifier mask equivalent, as
   best it can (the X server may not have a hyper key defined, for
   instance). */
unsigned int
x11_mask_to_rp_mask (unsigned int mask)
{
  unsigned int result = 0;

  PRINT_DEBUG (("x11 mask = %x\n", mask));

  result |= mask & ControlMask ? RP_CONTROL_MASK:0;
  result |= mask & rp_modifier_info.meta_mod_mask ? RP_META_MASK:0;
  result |= mask & rp_modifier_info.alt_mod_mask ? RP_ALT_MASK:0;
  result |= mask & rp_modifier_info.hyper_mod_mask ? RP_HYPER_MASK:0;
  result |= mask & rp_modifier_info.super_mod_mask ? RP_SUPER_MASK:0;

  PRINT_DEBUG (("rp mask = %x\n", mask));

  return result;
}

/* Convert an rp modifier mask to the x11 modifier mask equivalent, as
   best it can (the X server may not have a hyper key defined, for
   instance). */
unsigned int
rp_mask_to_x11_mask (unsigned int mask)
{
  unsigned int result = 0;

  PRINT_DEBUG (("rp mask = %x\n", mask));

  result |= mask & RP_CONTROL_MASK ? ControlMask:0;
  result |= mask & RP_META_MASK ? rp_modifier_info.meta_mod_mask:0;
  result |= mask & RP_ALT_MASK ? rp_modifier_info.alt_mod_mask:0;
  result |= mask & RP_HYPER_MASK ? rp_modifier_info.hyper_mod_mask:0;
  result |= mask & RP_SUPER_MASK ? rp_modifier_info.super_mod_mask:0;

  PRINT_DEBUG (("x11 mask = %x\n", mask));

  return result;
}


/* Figure out what keysyms are attached to what modifiers */
void
update_modifier_map ()
{
  unsigned int modmasks[] = 
    { Mod1Mask, Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask };
  int row, col;	/* The row and column in the modifier table.  */
  XModifierKeymap *mods;

  rp_modifier_info.meta_mod_mask = 0;
  rp_modifier_info.alt_mod_mask = 0;
  rp_modifier_info.super_mod_mask = 0;
  rp_modifier_info.hyper_mod_mask = 0;
  rp_modifier_info.num_lock_mask = 0;
  rp_modifier_info.scroll_lock_mask = 0;

  mods = XGetModifierMapping (dpy);

  for (row=3; row < 8; row++)
    for (col=0; col < mods->max_keypermod; col++)
      {
	KeyCode code = mods->modifiermap[(row * mods->max_keypermod) + col];
	
	if (code == 0) continue;
	
	switch (XKeycodeToKeysym(dpy, code, 0))
	  {
	  case XK_Meta_L:
	  case XK_Meta_R:
	    rp_modifier_info.meta_mod_mask |= modmasks[row - 3];
	    PRINT_DEBUG (("Found Meta on %d\n",
			 rp_modifier_info.meta_mod_mask));
	    break;

	  case XK_Alt_L:
	  case XK_Alt_R:
	    rp_modifier_info.alt_mod_mask |= modmasks[row - 3];
	    PRINT_DEBUG (("Found Alt on %d\n",
			 rp_modifier_info.alt_mod_mask));
	    break;

	  case XK_Super_L:
	  case XK_Super_R:
	    rp_modifier_info.super_mod_mask |= modmasks[row - 3];
	    PRINT_DEBUG (("Found Super on %d\n",
			 rp_modifier_info.super_mod_mask));
	    break;

	  case XK_Hyper_L:
	  case XK_Hyper_R:
	    rp_modifier_info.hyper_mod_mask |= modmasks[row - 3];
	    PRINT_DEBUG (("Found Hyper on %d\n",
			 rp_modifier_info.hyper_mod_mask));
	    break;

	  case XK_Num_Lock:
	    rp_modifier_info.num_lock_mask |= modmasks[row - 3];
	    PRINT_DEBUG (("Found NumLock on %d\n", 
			 rp_modifier_info.num_lock_mask));
	    break;

	  case XK_Scroll_Lock:
	    rp_modifier_info.scroll_lock_mask |= modmasks[row - 3];
	    PRINT_DEBUG (("Found ScrollLock on %d\n", 
			 rp_modifier_info.scroll_lock_mask));
	    break;
	  default:
	    break;
	  }
      }
  
  /* Stolen from Emacs 21.0.90 - xterm.c */
  /* If we couldn't find any meta keys, accept any alt keys as meta keys.  */
  if (! rp_modifier_info.meta_mod_mask)
    {
      rp_modifier_info.meta_mod_mask = rp_modifier_info.alt_mod_mask;
      rp_modifier_info.alt_mod_mask = 0;
    }

  /* If some keys are both alt and meta,
     make them just meta, not alt.  */
  if (rp_modifier_info.alt_mod_mask & rp_modifier_info.meta_mod_mask)
    {
      rp_modifier_info.alt_mod_mask &= ~rp_modifier_info.meta_mod_mask;
    }

  XFreeModifiermap (mods);
}

/* Grab the key while ignoring annoying modifier keys including
   caps lock, num lock, and scroll lock. */
void
grab_key (int keycode, unsigned int modifiers, Window grab_window)
{
  unsigned int mod_list[8];
  int i;

  /* Convert to a modifier mask that X Windows will understand. */
  modifiers = rp_mask_to_x11_mask (modifiers);

  /* Create a list of all possible combinations of ignored
     modifiers. Assumes there are only 3 ignored modifiers. */
  mod_list[0] = 0;
  mod_list[1] = LockMask;
  mod_list[2] = rp_modifier_info.num_lock_mask;
  mod_list[3] = mod_list[1] | mod_list[2];
  mod_list[4] = rp_modifier_info.scroll_lock_mask;
  mod_list[5] = mod_list[1] | mod_list[4];
  mod_list[6] = mod_list[2] | mod_list[4];
  mod_list[7] = mod_list[1] | mod_list[2] | mod_list[4];

  /* Grab every combination of ignored modifiers. */
  for (i=0; i<8; i++)
    {
      XGrabKey(dpy, keycode, modifiers | mod_list[i],
	       grab_window, True, GrabModeAsync, GrabModeAsync);
    }
}


/* Return the name of the keysym. caller must free returned pointer */
char *
keysym_to_string (KeySym keysym, unsigned int modifier)
{
  static char *null_string = "NULL"; /* A NULL string. */
  struct sbuf *name;
  char *tmp;

  name = sbuf_new (0);

  if (modifier & RP_CONTROL_MASK) sbuf_concat (name, "C-");
  if (modifier & RP_META_MASK) sbuf_concat (name, "M-");
  if (modifier & RP_ALT_MASK) sbuf_concat (name, "A-");
  if (modifier & RP_HYPER_MASK) sbuf_concat (name, "H-");
  if (modifier & RP_SUPER_MASK) sbuf_concat (name, "S-");
    
  /* On solaris machines (perhaps other machines as well) this call
     can return NULL. In this case use the "NULL" string. */
  tmp = XKeysymToString (keysym);
  if (tmp == NULL)
    tmp = null_string;

  sbuf_concat (name, tmp);

  /* Eat the nut and throw away the shells. */
  tmp = sbuf_get (name);
  free (name);

  return tmp;
}

/* Cooks a keycode + modifier into a keysym + modifier. This should be
   used anytime meaningful key information is to be extracted from a
   KeyPress or KeyRelease event. 

   returns the number of bytes in keysym_name. If you are not
   interested in the keysym name pass in NULL for keysym_name and 0
   for len. */
int
cook_keycode (XKeyEvent *ev, KeySym *keysym, unsigned int *mod, char *keysym_name, int len, int ignore_bad_mods)
{
  int nbytes;
 
  if (ignore_bad_mods)
    {
      ev->state &= ~(LockMask
		     | rp_modifier_info.num_lock_mask
		     | rp_modifier_info.scroll_lock_mask);
    }

  nbytes =  XLookupString (ev, keysym_name, len, keysym, NULL);

  *mod = ev->state;
  *mod &= (rp_modifier_info.meta_mod_mask
	   | rp_modifier_info.alt_mod_mask
	   | rp_modifier_info.hyper_mod_mask
	   | rp_modifier_info.super_mod_mask
	   | ControlMask );

  return nbytes;
}

int
read_key (KeySym *keysym, unsigned int *modifiers, char *keysym_name, int len, int gobble_rel)
{
  XEvent ev;
  int nbytes;
  unsigned int keycode;

  /* Read a key from the keyboard. */
  do
    {
      XMaskEvent (dpy, KeyPressMask, &ev);
      /* Store the keycode so we can wait for it's corresponding key
	 release event. */
      keycode = ev.xkey.keycode;
      *modifiers = ev.xkey.state;
      nbytes = cook_keycode (&ev.xkey, keysym, modifiers, keysym_name, len, 0);
    } while (IsModifierKey (*keysym));

  /* Gobble the release event for the key we pressed. */
  if (gobble_rel)
    do
      {
	XMaskEvent (dpy, KeyReleaseMask, &ev);
      } while (ev.xkey.keycode != keycode);

  return nbytes;
}

static void
update_input_window (screen_info *s, char *prompt, char *input, int input_len)
{
  int 	prompt_width = XTextWidth (defaults.font, prompt, strlen (prompt));
  int 	input_width  = XTextWidth (defaults.font, input, input_len);
  int 	width, height;

  width = defaults.bar_x_padding * 2 + prompt_width + input_width;
  height = (FONT_HEIGHT (defaults.font) + defaults.bar_y_padding * 2);

  if (width < defaults.input_window_size + prompt_width)
    {
      width = defaults.input_window_size + prompt_width;
    }

  XMoveResizeWindow (dpy, s->input_window, 
		     bar_x (s, width), bar_y (s, height), width, height);

  XClearWindow (dpy, s->input_window);
  XSync (dpy, False);

  XDrawString (dpy, s->input_window, s->normal_gc, 
	       defaults.bar_x_padding, 
	       defaults.bar_y_padding + defaults.font->max_bounds.ascent, prompt, 
	       strlen (prompt));

  XDrawString (dpy, s->input_window, s->normal_gc, 
	       defaults.bar_x_padding + prompt_width,
	       defaults.bar_y_padding + defaults.font->max_bounds.ascent, input, 
	       input_len);

  /* Draw a cheap-o cursor. */
  XDrawLine (dpy, s->input_window, s->normal_gc, 
	     defaults.bar_x_padding + prompt_width + input_width + 2, 
	     defaults.bar_y_padding + 1, 
	     defaults.bar_x_padding + prompt_width + input_width + 2,
	     defaults.bar_y_padding + FONT_HEIGHT (defaults.font) - 1);
}

char *
get_input (char *prompt)
{
  return get_more_input (prompt, "");
}

char *
get_more_input (char *prompt, char *preinput)
{
  /* Emacs 21 uses a 513 byte string to store the keysym name. */
  char keysym_buf[513];	
  int keysym_bufsize = sizeof (keysym_buf);
  int nbytes;
  screen_info *s = current_screen ();
  int cur_len = 0;		/* Current length of the string. */
  int allocated_len=100; /* The amount of memory we allocated for str */
  KeySym ch;
  unsigned int modifier;
  int revert;
  Window fwin;
  char *str;
  int history_index = input_num_history_entries;

  /* Allocate some memory to start with. */
  str = (char *) xmalloc ( allocated_len );

  /* load in the preinput */
  strcpy (str, preinput);
  cur_len = strlen (preinput);

  /* We don't want to draw overtop of the program bar. */
  hide_bar (s);

  XMapWindow (dpy, s->input_window);
  XRaiseWindow (dpy, s->input_window);
  XClearWindow (dpy, s->input_window);
  XSync (dpy, False);

  update_input_window (s, prompt, str, cur_len);

  XGetInputFocus (dpy, &fwin, &revert);
  XSetInputFocus (dpy, s->input_window, RevertToPointerRoot, CurrentTime);
  /* XSync (dpy, False); */


  nbytes = read_key (&ch, &modifier, keysym_buf, keysym_bufsize, 0);
  while (ch != XK_Return) 
    {
      PRINT_DEBUG (("key %ld\n", ch));
      if (ch == XK_BackSpace)
	{
	  if (cur_len > 0) cur_len--;
	  update_input_window(s, prompt, str, cur_len);
	}
      else if (ch == INPUT_PREV_HISTORY_KEY 
	       && modifier == INPUT_PREV_HISTORY_MODIFIER)
	{
	  /* Cycle through the history. */
	  if (input_num_history_entries > 0)
	    {
	      history_index--;
	      if (history_index < 0)
		{
		  history_index = input_num_history_entries - 1;
		}

	      free (str);
	      str = xstrdup (input_history[history_index]);
	      allocated_len = strlen (str) + 1;
	      cur_len = allocated_len - 1;

	      update_input_window (s, prompt, str, cur_len);
	    }
	}
      else if (ch == INPUT_NEXT_HISTORY_KEY 
	       && modifier == INPUT_NEXT_HISTORY_MODIFIER)
	{
	  /* Cycle through the history. */
	  if (input_num_history_entries > 0)
	    {
	      history_index++;
	      if (history_index >= input_num_history_entries)
		{
		  history_index = 0;
		}

	      free (str);
	      str = xstrdup (input_history[history_index]);
	      allocated_len = strlen (str) + 1;
	      cur_len = allocated_len - 1;

	      update_input_window (s, prompt, str, cur_len);
	    }
	}
      else if (ch == INPUT_ABORT_KEY && modifier == INPUT_ABORT_MODIFIER)
	{
	  /* User aborted. */
	  free (str);
	  XSetInputFocus (dpy, fwin, RevertToPointerRoot, CurrentTime);
	  XUnmapWindow (dpy, s->input_window);
	  return NULL;
	}
      else
	{
	  if (cur_len + nbytes > allocated_len - 1)
	    {
	      allocated_len += nbytes + 100;
	      str = xrealloc ( str, allocated_len );
	    }

	  strncpy (&str[cur_len], keysym_buf, nbytes);
/* 	  str[cur_len] = ch; */
	  cur_len+=nbytes;

	  update_input_window(s, prompt, str, cur_len);
	}

      nbytes = read_key (&ch, &modifier, keysym_buf, keysym_bufsize, 0);
    }

  str[cur_len] = 0;

  /* Push the history entries down. */
  if (input_num_history_entries >= INPUT_MAX_HISTORY)
    {
      int i;
      free (input_history[0]);
      for (i=0; i<INPUT_MAX_HISTORY-1; i++)
	{
	  input_history[i] = input_history[i+1];
	}

      input_num_history_entries--;
    }

  /* Store the string in the history. */
  input_history[input_num_history_entries] = xstrdup (str);
  input_num_history_entries++;

  XSetInputFocus (dpy, fwin, RevertToPointerRoot, CurrentTime);
  XUnmapWindow (dpy, s->input_window);
  return str;
}  

void
free_history ()
{
  int i;

  for (i=0; i<input_num_history_entries; i++)
    free (input_history[i]);
}