File: hands.c

package info (click to toggle)
xwrits 2.21-6
  • links: PTS
  • area: main
  • in suites: etch, etch-m68k, lenny
  • size: 576 kB
  • ctags: 651
  • sloc: ansic: 5,393; sh: 330; makefile: 98
file content (492 lines) | stat: -rw-r--r-- 13,722 bytes parent folder | download | duplicates (3)
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
479
480
481
482
483
484
485
486
487
488
489
490
491
492
#include <config.h>
#include "xwrits.h"
#include <stdlib.h>
#include <ctype.h>
#include <math.h>
#include <stdarg.h>
#include <assert.h>

#define NEW_HAND_TRIES 6

/* creating a new hand */

static void
get_icon_size(Port *port)
{
  XIconSize *ic;
  int nic;
  int w = ocurrent->icon_slideshow->screen_width;
  int h = ocurrent->icon_slideshow->screen_height;
  if (XGetIconSizes(port->display, port->root_window, &ic, &nic) != 0) {
    if (nic != 0) {
      if (w < ic->min_width) w = ic->min_width;
      if (h < ic->min_height) h = ic->min_height;
      if (w > ic->max_width) w = ic->max_width;
      if (h > ic->max_height) h = ic->max_height;
    }
    XFree(ic);
  }
  port->icon_width = w;
  port->icon_height = h;
}

#define xwMAX(i, j) ((i) > (j) ? (i) : (j))
#define xwMIN(i, j) ((i) < (j) ? (i) : (j))

/* get_best_position: gets the best (x, y) pair from the list of pairs stored
     in xlist and ylist (num pairs overall). Best means `covering smallest
     number of existing hands.' Returns it in *retx and *rety */

static void
get_best_position(Port *port, int *xlist, int *ylist, int num,
		  int width, int height, int *retx, int *rety)
{
  unsigned int best_penalty = 0x8000U;
  unsigned int penalty;
  int i, overw, overh, best = 0;
  Hand *h;
  for (i = 0; i < num; i++) {
    int x1 = xlist[i], y1 = ylist[i];
    int x2 = x1 + width, y2 = y1 + height;
    penalty = 0;
    for (h = port->hands; h; h = h->next)
      if (h->mapped) {
	overw = xwMIN(x2, h->x + h->width) - xwMAX(x1, h->x);
	overh = xwMIN(y2, h->y + h->height) - xwMAX(y1, h->y);
	if (overw > 0 && overh > 0) penalty += overw * overh;
      }
    if (penalty < best_penalty) {
      best_penalty = penalty;
      best = i;
    }
  }
  *retx = xlist[best];
  *rety = ylist[best];
}

Hand *
new_hand(Port *slave_port, int x, int y)
{
  static XClassHint classh;
  static XSizeHints *xsh;
  static XWMHints *xwmh;
  static XTextProperty window_name, icon_name;
  static uint32_t *mwm_hints;
  Hand *nh = xwNEW(Hand);
  Hand *nh_icon = xwNEW(Hand);
  int width = ocurrent->slideshow->screen_width;
  int height = ocurrent->slideshow->screen_height;
  Port *port;

  /* check for random port, patch by Peter Maydell <maydell@tao-group.com> */
  if (slave_port == NEW_HAND_RANDOM_PORT)
      slave_port = ports[(rand() >> 4) % nports];
  port = slave_port->master;

  /* is this the permanent hand? */
  if (!port->permanent_hand) {
    nh->permanent = 1;
    port->permanent_hand = nh;
  } else
    nh->permanent = 0;
  
  /* set position and size */
  if (x == NEW_HAND_CENTER)
    x = slave_port->left + (slave_port->width - width) / 2;
  if (y == NEW_HAND_CENTER)
    y = slave_port->top + (slave_port->height - height) / 2;
  
  if (x == NEW_HAND_RANDOM || y == NEW_HAND_RANDOM) {
    int xs[NEW_HAND_TRIES], ys[NEW_HAND_TRIES], i;
    int xdist = slave_port->width - width;
    int ydist = slave_port->height - height;
    int xrand = (x == NEW_HAND_RANDOM);
    int yrand = (y == NEW_HAND_RANDOM);
    for (i = 0; i < NEW_HAND_TRIES; i++) {
	xs[i] = (xrand ? slave_port->left + ((rand() >> 4) % xdist) : x);
	ys[i] = (yrand ? slave_port->top + ((rand() >> 4) % ydist) : y);
    }
    get_best_position(port, xs, ys, NEW_HAND_TRIES, width, height, &x, &y);
  }

  if (!port->icon_width)
    get_icon_size(port);
  
  if (!xwmh) {
    const char *stringlist[2];
    stringlist[0] = ocurrent->window_title;
    stringlist[1] = NULL;
    XStringListToTextProperty((char **)stringlist, 1, &window_name);
    XStringListToTextProperty((char **)stringlist, 1, &icon_name);
    classh.res_name = "xwrits";
    classh.res_class = "XWrits";
    
    xsh = XAllocSizeHints();
    xsh->flags = USPosition | PMinSize | PMaxSize;
    xsh->min_width = xsh->max_width = width;
    xsh->min_height = xsh->max_height = height;
    
    xwmh = XAllocWMHints();
    xwmh->flags = InputHint | StateHint | IconWindowHint;
    xwmh->input = True;
    
    /* Silly hackery to get the MWM appearance *just right*: ie., no resize
       handles or maximize button, no Resize or Maximize entries in window
       menu. The constitution of the property itself was inferred from data
       in <Xm/MwmUtil.h> and output of xprop. */
    mwm_hints = xwNEWARR(uint32_t, 4);
    mwm_hints[0] = (1L << 0) | (1L << 1);
    /* flags = MWM_HINTS_FUNCTIONS | MWM_HINTS_DECORATIONS */
    mwm_hints[1] = (1L << 2) | (1L << 5);
    /* functions = MWM_FUNC_MOVE | MWM_FUNC_CLOSE */
    mwm_hints[2] = (1L << 1) | (1L << 3) | (1L << 4);
    /* decorations = MWM_DECOR_BORDER | MWM_DECOR_TITLE | MWM_DECOR_MENU */
    mwm_hints[3] = ~(0L);
    
    /* Add MINIMIZE options only if the window might be iconifiable */
    if (!ocurrent->never_iconify) {
      mwm_hints[1] |= (1L << 3); /* MWM_FUNC_MINIMIZE */
      mwm_hints[2] |= (1L << 5); /* MWM_DECOR_MINIMIZE */
    }
  }
  
  /* create windows */
  {
    XSetWindowAttributes setattr;
    unsigned long setattr_mask;
    setattr.colormap = port->colormap;
    setattr.backing_store = NotUseful;
    setattr.save_under = False;
    setattr.border_pixel = 0;
    setattr.background_pixel = 0;
    setattr_mask = CWColormap | CWBorderPixel | CWBackPixel | CWBackingStore
      | CWSaveUnder;
    
    nh->w = XCreateWindow
      (port->display, port->root_window,
       x, y, width, height, 0,
       port->depth, InputOutput, port->visual, setattr_mask, &setattr);
    
    xwmh->icon_window = nh_icon->w = XCreateWindow
      (port->display, port->root_window,
       x, y, port->icon_width, port->icon_height, 0,
       port->depth, InputOutput, port->visual, setattr_mask, &setattr);
  }
  
  /* set XWRITS_WINDOW property early to minimize races */
  mark_xwrits_window(port, nh->w);

  xsh->x = x;
  xsh->y = y;
  xwmh->initial_state = ocurrent->appear_iconified ? IconicState : NormalState;
  XSetWMProperties(port->display, nh->w, &window_name, &icon_name,
		   NULL, 0, xsh, xwmh, &classh);
  XSetWMProtocols(port->display, nh->w, &port->wm_delete_window_atom, 1);
  XChangeProperty(port->display, nh->w, port->mwm_hints_atom,
		  port->mwm_hints_atom, 32, PropModeReplace,
		  (unsigned char *)mwm_hints, 4);
  
  XSelectInput(port->display, nh->w, ButtonPressMask | StructureNotifyMask
	       | KeyPressMask | VisibilityChangeMask | ExposureMask);
  XSelectInput(port->display, nh_icon->w, StructureNotifyMask);
  
  nh->port = port;
  nh->icon = nh_icon;
  nh->x = x;			/* will be set correctly */
  nh->y = y;			/* by next ConfigureNotify */
  nh->width = width;
  nh->height = height;
  nh->root_child = nh->w;
  nh->is_icon = 0;
  nh->mapped = 0;
  nh->configured = 0;
  nh->slideshow = 0;
  nh->clock = 0;
  nh->toplevel = 1;

  if (port->hands) port->hands->prev = nh;
  nh->next = port->hands;
  nh->prev = 0;
  port->hands = nh;

  nh_icon->port = port;
  nh_icon->icon = nh;
  nh_icon->root_child = nh->w;
  nh_icon->is_icon = 1;
  nh_icon->mapped = 0;
  nh_icon->configured = 0;
  nh_icon->slideshow = 0;
  nh_icon->clock = 0;
  nh_icon->permanent = 0;
  nh_icon->toplevel = 1;
  if (port->icon_hands) port->icon_hands->prev = nh_icon;
  nh_icon->next = port->icon_hands;
  nh_icon->prev = 0;
  port->icon_hands = nh_icon;
  
  return nh;
}

Hand *
new_hand_subwindow(Port *port, Window parent, int x, int y)
{
  Hand *nh = xwNEW(Hand);
  int width = ocurrent->slideshow->screen_width;
  int height = ocurrent->slideshow->screen_height;
  unsigned parent_width, parent_height;
  port = port->master;

  if (x == NEW_HAND_CENTER || y == NEW_HAND_CENTER || x == NEW_HAND_RANDOM
      || y == NEW_HAND_RANDOM) {
      /* get dimensions of 'parent' */
      Window root;
      int x, y;
      unsigned bw, depth;
      (void) XGetGeometry(port->display, parent, &root, &x, &y, &parent_width, &parent_height, &bw, &depth);
  }
  
  if (x == NEW_HAND_CENTER)
    x = (parent_width - width) / 2;
  if (y == NEW_HAND_CENTER)
    y = (parent_height - height) / 2;
  
  if (x == NEW_HAND_RANDOM)
    x = (rand() >> 4) % (parent_width - width);
  if (y == NEW_HAND_RANDOM)
    y = (rand() >> 4) % (parent_height - height);
  
  {
    XSetWindowAttributes setattr;
    unsigned long setattr_mask;
    setattr.colormap = port->colormap;
    setattr.backing_store = NotUseful;
    setattr.save_under = False;
    setattr.border_pixel = 0;
    setattr.background_pixel = 0;
    setattr_mask = CWColormap | CWBorderPixel | CWBackPixel | CWBackingStore
      | CWSaveUnder;
    
    nh->w = XCreateWindow
      (port->display, parent,
       x, y, width, height, 0,
       port->depth, InputOutput, port->visual, setattr_mask, &setattr);
  }

  mark_xwrits_window(port, nh->w);

  XSelectInput(port->display, nh->w, ButtonPressMask | StructureNotifyMask
	       | KeyPressMask | VisibilityChangeMask | ExposureMask);
  
  nh->port = port;
  nh->icon = 0;
  nh->x = x;			/* will be set correctly */
  nh->y = y;			/* by next ConfigureNotify */
  nh->width = width;
  nh->height = height;
  nh->root_child = nh->w;
  nh->is_icon = 0;
  nh->mapped = 0;
  nh->configured = 0;
  nh->slideshow = 0;
  nh->clock = 0;
  nh->permanent = 0;
  nh->toplevel = 0;
  if (port->hands) port->hands->prev = nh;
  nh->next = port->hands;
  nh->prev = 0;
  port->hands = nh;
  
  return nh;
}


/* destroy a hand */

void
destroy_hand(Hand *h)
{
  Port *port = h->port;
  assert(!h->is_icon);
  
  unschedule_data(A_FLASH, h, 0);
  /* 29.Jan.2000 oops -- forgot to do this, it caused segfaults */
  if (h->icon)
    unschedule_data(A_FLASH, h->icon, 0);
  
  if (h->permanent) {
    XEvent event;
    /* last remaining hand; don't destroy it, unmap it */
    XUnmapWindow(port->display, h->w);
    /* Synthetic UnmapNotify required by ICCCM to withdraw the window */
    event.type = UnmapNotify;
    event.xunmap.event = port->root_window;
    event.xunmap.window = h->w;
    event.xunmap.from_configure = False;
    XSendEvent(port->display, port->root_window, False,
	       SubstructureRedirectMask | SubstructureNotifyMask, &event);
    /* mark hand as unmapped now */
    h->mapped = h->icon->mapped = 0;
  } else {
    if (h->icon) {
      Hand *ih = h->icon;
      XDestroyWindow(port->display, ih->w);
      if (ih->prev) ih->prev->next = ih->next;
      else port->icon_hands = ih->next;
      if (ih->next) ih->next->prev = ih->prev;
      xfree(ih);
    }
    XDestroyWindow(port->display, h->w);
    if (h->prev) h->prev->next = h->next;
    else port->hands = h->next;
    if (h->next) h->next->prev = h->prev;
    xfree(h);
  }
}


/* count active hands (mapped or iconified) */

int
active_hands(void)
{
  Hand *h;
  int i, n = 0;
  for (i = 0; i < nports; i++)
    for (h = ports[i]->hands; h; h = h->next)
      if (h->mapped || h->icon->mapped)
	n++;
  return n;
}


/* translate a Window to a Hand */

Hand *
window_to_hand(Port *port, Window w, int allow_icons)
{
  Hand *h;
  for (h = port->hands; h; h = h->next)
    if (h->w == w)
      return h;
  if (allow_icons)
    for (h = port->icon_hands; h; h = h->next)
      if (h->w == w)
	return h;
  return 0;
}


/* draw a picture on a hand */

static void
ensure_picture(Port *port, Gif_Stream *gfs, int n)
{
  Gif_Image *gfi = gfs->images[n];
  Picture *p, *last_p, *last_last_p;
  int i;
  int picn = port->port_number;
  
  for (i = 0; i < n; i++) {
    p = (Picture *)gfs->images[i]->user_data;
    if (!p->pix[picn])		/* no picture cached for earlier image */
      ensure_picture(port, gfs, i);
  }
  
  p = (Picture *)gfi->user_data;
  last_p = (n > 0 ? (Picture *)gfs->images[n-1]->user_data : 0);
  last_last_p = (n > 1 ? (Picture *)gfs->images[n-2]->user_data : 0);
  
  /* reuse pixmaps from other streams */
  if (p->canonical && gfi->transparent < 0 && gfi->left == 0 && gfi->top == 0
      && gfi->width == gfs->screen_width && gfi->height == gfs->screen_height
      && ((Picture *)p->canonical->user_data)->pix[picn]) {
    p->pix[picn] = ((Picture *)p->canonical->user_data)->pix[picn];
    return;
  } else if (p->canonical)
    p->canonical = 0;
  
  p->pix[picn] = Gif_XNextImage
    (port->gfx, (last_last_p ? last_last_p->pix[picn] : None),
     (last_p ? last_p->pix[picn] : None),
     gfs, n);
}

void
draw_slide(Hand *h)
{
  Gif_Stream *gfs;
  Gif_Image *gfi;
  Port *port;
  Picture *p;

  if (!h || !h->slideshow)
    return;

  gfs = h->slideshow;
  gfi = gfs->images[h->slide];
  p = (Picture *)gfi->user_data;
  port = h->port;
  
  if (!p->pix[port->port_number])
    ensure_picture(port, gfs, h->slide);
  
  XSetWindowBackgroundPixmap(port->display, h->w, p->pix[port->port_number]);
  XClearWindow(port->display, h->w);
  
  if (h->clock)
    draw_clock(h, 0);
}


/* unmap all windows */

void
unmap_all(void)
{
  int i;
  for (i = 0; i < nports; i++) {
    Hand *prev = 0, *trav = ports[i]->hands;
    while (trav) {
      if (trav->permanent) {
	prev = trav;
	trav->slideshow = 0;
      }
      destroy_hand(trav);
      trav = (prev == 0 ? ports[i]->hands : prev->next);
    }
    XFlush(ports[i]->display);
  }
}


/* search for some hand on a given port, which might be a slave, or have
   slaves */

Hand *
find_one_hand(Port *port, int mapped)
{
    Hand *h, *acceptable;
    
    if (port->master == port) {
	if (!mapped)
	    return port->hands;
	else
	    for (h = acceptable = port->hands; h; h = h->next)
		if (h->mapped)
		    return h;
    } else {
	for (h = port->master->hands, acceptable = 0; h; h = h->next)
	    if (h->x >= port->left && h->x < port->left + port->width
		&& h->y >= port->top && h->y < port->top + port->height) {
		acceptable = h;
		if (mapped && h->mapped)
		    return h;
	    }
	if (!acceptable)
	    acceptable = new_hand(port, NEW_HAND_CENTER, NEW_HAND_CENTER);
    }
    
    if (mapped && !acceptable->mapped)
	XMapRaised(port->display, acceptable->w);
    return acceptable;
}