i3
x.c
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1 #undef I3__FILE__
2 #define I3__FILE__ "x.c"
3 /*
4  * vim:ts=4:sw=4:expandtab
5  *
6  * i3 - an improved dynamic tiling window manager
7  * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
8  *
9  * x.c: Interface to X11, transfers our in-memory state to X11 (see also
10  * render.c). Basically a big state machine.
11  *
12  */
13 #include "all.h"
14 
15 /* Stores the X11 window ID of the currently focused window */
16 xcb_window_t focused_id = XCB_NONE;
17 
18 /* The bottom-to-top window stack of all windows which are managed by i3.
19  * Used for x_get_window_stack(). */
20 static xcb_window_t *btt_stack;
21 static int btt_stack_num;
22 
23 /* Stores coordinates to warp mouse pointer to if set */
24 static Rect *warp_to;
25 
26 /*
27  * Describes the X11 state we may modify (map state, position, window stack).
28  * There is one entry per container. The state represents the current situation
29  * as X11 sees it (with the exception of the order in the state_head CIRCLEQ,
30  * which represents the order that will be pushed to X11, while old_state_head
31  * represents the current order). It will be updated in x_push_changes().
32  *
33  */
34 typedef struct con_state {
35  xcb_window_t id;
36  bool mapped;
37  bool unmap_now;
39 
41  Con *con;
42 
43  /* For reparenting, we have a flag (need_reparent) and the X ID of the old
44  * frame this window was in. The latter is necessary because we need to
45  * ignore UnmapNotify events (by changing the window event mask). */
47  xcb_window_t old_frame;
48 
51 
52  bool initial;
53 
54  char *name;
55 
57  CIRCLEQ_ENTRY(con_state) old_state;
58 } con_state;
59 
60 CIRCLEQ_HEAD(state_head, con_state) state_head =
61  CIRCLEQ_HEAD_INITIALIZER(state_head);
62 
63 CIRCLEQ_HEAD(old_state_head, con_state) old_state_head =
64  CIRCLEQ_HEAD_INITIALIZER(old_state_head);
65 
66 /*
67  * Returns the container state for the given frame. This function always
68  * returns a container state (otherwise, there is a bug in the code and the
69  * container state of a container for which x_con_init() was not called was
70  * requested).
71  *
72  */
73 static con_state *state_for_frame(xcb_window_t window) {
75  CIRCLEQ_FOREACH(state, &state_head, state)
76  if (state->id == window)
77  return state;
78 
79  /* TODO: better error handling? */
80  ELOG("No state found\n");
81  assert(false);
82  return NULL;
83 }
84 
85 /*
86  * Initializes the X11 part for the given container. Called exactly once for
87  * every container from con_new().
88  *
89  */
90 void x_con_init(Con *con, uint16_t depth) {
91  /* TODO: maybe create the window when rendering first? we could then even
92  * get the initial geometry right */
93 
94  uint32_t mask = 0;
95  uint32_t values[5];
96 
97  xcb_visualid_t visual = XCB_COPY_FROM_PARENT;
98  xcb_colormap_t win_colormap = XCB_NONE;
99  if (depth != root_depth && depth != XCB_COPY_FROM_PARENT) {
100  /* For custom visuals, we need to create a colormap before creating
101  * this window. It will be freed directly after creating the window. */
102  visual = get_visualid_by_depth(depth);
103  win_colormap = xcb_generate_id(conn);
104  xcb_create_colormap_checked(conn, XCB_COLORMAP_ALLOC_NONE, win_colormap, root, visual);
105 
106  /* We explicitly set a background color and border color (even though we
107  * don’t even have a border) because the X11 server requires us to when
108  * using 32 bit color depths, see
109  * http://stackoverflow.com/questions/3645632 */
110  mask |= XCB_CW_BACK_PIXEL;
111  values[0] = root_screen->black_pixel;
112 
113  mask |= XCB_CW_BORDER_PIXEL;
114  values[1] = root_screen->black_pixel;
115 
116  /* our own frames should not be managed */
117  mask |= XCB_CW_OVERRIDE_REDIRECT;
118  values[2] = 1;
119 
120  /* see include/xcb.h for the FRAME_EVENT_MASK */
121  mask |= XCB_CW_EVENT_MASK;
122  values[3] = FRAME_EVENT_MASK & ~XCB_EVENT_MASK_ENTER_WINDOW;
123 
124  mask |= XCB_CW_COLORMAP;
125  values[4] = win_colormap;
126  } else {
127  /* our own frames should not be managed */
128  mask = XCB_CW_OVERRIDE_REDIRECT;
129  values[0] = 1;
130 
131  /* see include/xcb.h for the FRAME_EVENT_MASK */
132  mask |= XCB_CW_EVENT_MASK;
133  values[1] = FRAME_EVENT_MASK & ~XCB_EVENT_MASK_ENTER_WINDOW;
134 
135  mask |= XCB_CW_COLORMAP;
136  values[2] = colormap;
137  }
138 
139  Rect dims = { -15, -15, 10, 10 };
140  con->frame = create_window(conn, dims, depth, visual, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCURSOR_CURSOR_POINTER, false, mask, values);
141 
142  if (win_colormap != XCB_NONE)
143  xcb_free_colormap(conn, win_colormap);
144 
145  struct con_state *state = scalloc(sizeof(struct con_state));
146  state->id = con->frame;
147  state->mapped = false;
148  state->initial = true;
149  CIRCLEQ_INSERT_HEAD(&state_head, state, state);
150  CIRCLEQ_INSERT_HEAD(&old_state_head, state, old_state);
151  DLOG("adding new state for window id 0x%08x\n", state->id);
152 }
153 
154 /*
155  * Re-initializes the associated X window state for this container. You have
156  * to call this when you assign a client to an empty container to ensure that
157  * its state gets updated correctly.
158  *
159  */
160 void x_reinit(Con *con) {
161  struct con_state *state;
162 
163  if ((state = state_for_frame(con->frame)) == NULL) {
164  ELOG("window state not found\n");
165  return;
166  }
167 
168  DLOG("resetting state %p to initial\n", state);
169  state->initial = true;
170  state->child_mapped = false;
171  state->con = con;
172  memset(&(state->window_rect), 0, sizeof(Rect));
173 }
174 
175 /*
176  * Reparents the child window of the given container (necessary for sticky
177  * containers). The reparenting happens in the next call of x_push_changes().
178  *
179  */
180 void x_reparent_child(Con *con, Con *old) {
181  struct con_state *state;
182  if ((state = state_for_frame(con->frame)) == NULL) {
183  ELOG("window state for con not found\n");
184  return;
185  }
186 
187  state->need_reparent = true;
188  state->old_frame = old->frame;
189 }
190 
191 /*
192  * Moves a child window from Container src to Container dest.
193  *
194  */
195 void x_move_win(Con *src, Con *dest) {
196  struct con_state *state_src, *state_dest;
197 
198  if ((state_src = state_for_frame(src->frame)) == NULL) {
199  ELOG("window state for src not found\n");
200  return;
201  }
202 
203  if ((state_dest = state_for_frame(dest->frame)) == NULL) {
204  ELOG("window state for dest not found\n");
205  return;
206  }
207 
208  state_dest->con = state_src->con;
209  state_src->con = NULL;
210 
211  Rect zero = { 0, 0, 0, 0 };
212  if (memcmp(&(state_dest->window_rect), &(zero), sizeof(Rect)) == 0) {
213  memcpy(&(state_dest->window_rect), &(state_src->window_rect), sizeof(Rect));
214  DLOG("COPYING RECT\n");
215  }
216 }
217 
218 /*
219  * Kills the window decoration associated with the given container.
220  *
221  */
223  con_state *state;
224 
225  xcb_destroy_window(conn, con->frame);
226  xcb_free_pixmap(conn, con->pixmap);
227  xcb_free_gc(conn, con->pm_gc);
228  state = state_for_frame(con->frame);
229  CIRCLEQ_REMOVE(&state_head, state, state);
230  CIRCLEQ_REMOVE(&old_state_head, state, old_state);
231  FREE(state->name);
232  free(state);
233 
234  /* Invalidate focused_id to correctly focus new windows with the same ID */
235  focused_id = XCB_NONE;
236 }
237 
238 /*
239  * Returns true if the client supports the given protocol atom (like WM_DELETE_WINDOW)
240  *
241  */
242 bool window_supports_protocol(xcb_window_t window, xcb_atom_t atom) {
243  xcb_get_property_cookie_t cookie;
245  bool result = false;
246 
247  cookie = xcb_icccm_get_wm_protocols(conn, window, A_WM_PROTOCOLS);
248  if (xcb_icccm_get_wm_protocols_reply(conn, cookie, &protocols, NULL) != 1)
249  return false;
250 
251  /* Check if the client’s protocols have the requested atom set */
252  for (uint32_t i = 0; i < protocols.atoms_len; i++)
253  if (protocols.atoms[i] == atom)
254  result = true;
255 
257 
258  return result;
259 }
260 
261 /*
262  * Kills the given X11 window using WM_DELETE_WINDOW (if supported).
263  *
264  */
265 void x_window_kill(xcb_window_t window, kill_window_t kill_window) {
266  /* if this window does not support WM_DELETE_WINDOW, we kill it the hard way */
267  if (!window_supports_protocol(window, A_WM_DELETE_WINDOW)) {
268  if (kill_window == KILL_WINDOW) {
269  LOG("Killing specific window 0x%08x\n", window);
270  xcb_destroy_window(conn, window);
271  } else {
272  LOG("Killing the X11 client which owns window 0x%08x\n", window);
273  xcb_kill_client(conn, window);
274  }
275  return;
276  }
277 
278  /* Every X11 event is 32 bytes long. Therefore, XCB will copy 32 bytes.
279  * In order to properly initialize these bytes, we allocate 32 bytes even
280  * though we only need less for an xcb_configure_notify_event_t */
281  void *event = scalloc(32);
282  xcb_client_message_event_t *ev = event;
283 
284  ev->response_type = XCB_CLIENT_MESSAGE;
285  ev->window = window;
286  ev->type = A_WM_PROTOCOLS;
287  ev->format = 32;
288  ev->data.data32[0] = A_WM_DELETE_WINDOW;
289  ev->data.data32[1] = XCB_CURRENT_TIME;
290 
291  LOG("Sending WM_DELETE to the client\n");
292  xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)ev);
293  xcb_flush(conn);
294  free(event);
295 }
296 
297 /*
298  * Draws the decoration of the given container onto its parent.
299  *
300  */
302  Con *parent = con->parent;
303  bool leaf = con_is_leaf(con);
304 
305  /* This code needs to run for:
306  * • leaf containers
307  * • non-leaf containers which are in a stacked/tabbed container
308  *
309  * It does not need to run for:
310  * • direct children of outputs or dockareas
311  * • floating containers (they don’t have a decoration)
312  */
313  if ((!leaf &&
314  parent->layout != L_STACKED &&
315  parent->layout != L_TABBED) ||
316  parent->type == CT_OUTPUT ||
317  parent->type == CT_DOCKAREA ||
318  con->type == CT_FLOATING_CON)
319  return;
320 
321  /* Skip containers whose height is 0 (for example empty dockareas) */
322  if (con->rect.height == 0)
323  return;
324 
325  /* Skip containers whose pixmap has not yet been created (can happen when
326  * decoration rendering happens recursively for a window for which
327  * x_push_node() was not yet called) */
328  if (leaf && con->pixmap == XCB_NONE)
329  return;
330 
331  /* 1: build deco_params and compare with cache */
332  struct deco_render_params *p = scalloc(sizeof(struct deco_render_params));
333 
334  /* find out which colors to use */
335  if (con->urgent)
336  p->color = &config.client.urgent;
337  else if (con == focused || con_inside_focused(con))
338  p->color = &config.client.focused;
339  else if (con == TAILQ_FIRST(&(parent->focus_head)))
341  else
343 
344  p->border_style = con_border_style(con);
345 
346  Rect *r = &(con->rect);
347  Rect *w = &(con->window_rect);
348  p->con_rect = (struct width_height){ r->width, r->height };
349  p->con_window_rect = (struct width_height){ w->width, w->height };
350  p->con_deco_rect = con->deco_rect;
352  p->con_is_leaf = con_is_leaf(con);
353  p->parent_layout = con->parent->layout;
354 
355  if (con->deco_render_params != NULL &&
356  (con->window == NULL || !con->window->name_x_changed) &&
357  !parent->pixmap_recreated &&
358  !con->pixmap_recreated &&
359  memcmp(p, con->deco_render_params, sizeof(struct deco_render_params)) == 0) {
360  free(p);
361  goto copy_pixmaps;
362  }
363 
364  Con *next = con;
365  while ((next = TAILQ_NEXT(next, nodes))) {
366  FREE(next->deco_render_params);
367  }
368 
369  FREE(con->deco_render_params);
370  con->deco_render_params = p;
371 
372  if (con->window != NULL && con->window->name_x_changed)
373  con->window->name_x_changed = false;
374 
375  parent->pixmap_recreated = false;
376  con->pixmap_recreated = false;
377 
378  /* 2: draw the client.background, but only for the parts around the client_rect */
379  if (con->window != NULL) {
380  xcb_rectangle_t background[] = {
381  /* top area */
382  { 0, 0, r->width, w->y },
383  /* bottom area */
384  { 0, (w->y + w->height), r->width, r->height - (w->y + w->height) },
385  /* left area */
386  { 0, 0, w->x, r->height },
387  /* right area */
388  { w->x + w->width, 0, r->width - (w->x + w->width), r->height }
389  };
390 #if 0
391  for (int i = 0; i < 4; i++)
392  DLOG("rect is (%d, %d) with %d x %d\n",
393  background[i].x,
394  background[i].y,
395  background[i].width,
396  background[i].height
397  );
398 #endif
399 
400  xcb_change_gc(conn, con->pm_gc, XCB_GC_FOREGROUND, (uint32_t[]) { config.client.background });
401  xcb_poly_fill_rectangle(conn, con->pixmap, con->pm_gc, sizeof(background) / sizeof(xcb_rectangle_t), background);
402  }
403 
404  /* 3: draw a rectangle in border color around the client */
405  if (p->border_style != BS_NONE && p->con_is_leaf) {
406  /* We might hide some borders adjacent to the screen-edge */
407  adjacent_t borders_to_hide = ADJ_NONE;
408  borders_to_hide = con_adjacent_borders(con) & config.hide_edge_borders;
409 
411 #if 0
412  DLOG("con->rect spans %d x %d\n", con->rect.width, con->rect.height);
413  DLOG("border_rect spans (%d, %d) with %d x %d\n", br.x, br.y, br.width, br.height);
414  DLOG("window_rect spans (%d, %d) with %d x %d\n", con->window_rect.x, con->window_rect.y, con->window_rect.width, con->window_rect.height);
415 #endif
416 
417  /* These rectangles represents the border around the child window
418  * (left, bottom and right part). We don’t just fill the whole
419  * rectangle because some childs are not freely resizable and we want
420  * their background color to "shine through". */
421  xcb_change_gc(conn, con->pm_gc, XCB_GC_FOREGROUND, (uint32_t[]){ p->color->background });
422  if (!(borders_to_hide & ADJ_LEFT_SCREEN_EDGE)) {
423  xcb_rectangle_t leftline = { 0, 0, br.x, r->height };
424  xcb_poly_fill_rectangle(conn, con->pixmap, con->pm_gc, 1, &leftline);
425  }
426  if (!(borders_to_hide & ADJ_RIGHT_SCREEN_EDGE)) {
427  xcb_rectangle_t rightline = { r->width + br.width + br.x, 0, r->width, r->height };
428  xcb_poly_fill_rectangle(conn, con->pixmap, con->pm_gc, 1, &rightline);
429  }
430  if (!(borders_to_hide & ADJ_LOWER_SCREEN_EDGE)) {
431  xcb_rectangle_t bottomline = { 0, r->height + br.height + br.y, r->width, r->height };
432  xcb_poly_fill_rectangle(conn, con->pixmap, con->pm_gc, 1, &bottomline);
433  }
434  /* 1pixel border needs an additional line at the top */
435  if (p->border_style == BS_PIXEL && !(borders_to_hide & ADJ_UPPER_SCREEN_EDGE)) {
436  xcb_rectangle_t topline = { br.x, 0, con->rect.width + br.width + br.x, br.y };
437  xcb_poly_fill_rectangle(conn, con->pixmap, con->pm_gc, 1, &topline);
438  }
439 
440  /* Highlight the side of the border at which the next window will be
441  * opened if we are rendering a single window within a split container
442  * (which is undistinguishable from a single window outside a split
443  * container otherwise. */
444  if (TAILQ_NEXT(con, nodes) == NULL &&
445  TAILQ_PREV(con, nodes_head, nodes) == NULL &&
446  con->parent->type != CT_FLOATING_CON) {
447  xcb_change_gc(conn, con->pm_gc, XCB_GC_FOREGROUND, (uint32_t[]){ p->color->indicator });
448  if (p->parent_layout == L_SPLITH)
449  xcb_poly_fill_rectangle(conn, con->pixmap, con->pm_gc, 1, (xcb_rectangle_t[]){
450  { r->width + br.width + br.x, br.y, r->width, r->height + br.height } });
451  else if (p->parent_layout == L_SPLITV)
452  xcb_poly_fill_rectangle(conn, con->pixmap, con->pm_gc, 1, (xcb_rectangle_t[]){
453  { br.x, r->height + br.height + br.y, r->width - (2 * br.x), r->height } });
454  }
455 
456  }
457 
458  /* if this is a borderless/1pixel window, we don’t need to render the
459  * decoration. */
460  if (p->border_style != BS_NORMAL)
461  goto copy_pixmaps;
462 
463  /* 4: paint the bar */
464  xcb_change_gc(conn, parent->pm_gc, XCB_GC_FOREGROUND, (uint32_t[]){ p->color->background });
465  xcb_rectangle_t drect = { con->deco_rect.x, con->deco_rect.y, con->deco_rect.width, con->deco_rect.height };
466  xcb_poly_fill_rectangle(conn, parent->pixmap, parent->pm_gc, 1, &drect);
467 
468  /* 5: draw two unconnected horizontal lines in border color */
469  xcb_change_gc(conn, parent->pm_gc, XCB_GC_FOREGROUND, (uint32_t[]){ p->color->border });
470  Rect *dr = &(con->deco_rect);
471  int deco_diff_l = 2;
472  int deco_diff_r = 2;
473  if (parent->layout == L_TABBED) {
474  if (TAILQ_PREV(con, nodes_head, nodes) != NULL)
475  deco_diff_l = 0;
476  if (TAILQ_NEXT(con, nodes) != NULL)
477  deco_diff_r = 0;
478  }
479  xcb_segment_t segments[] = {
480  { dr->x, dr->y,
481  dr->x + dr->width - 1, dr->y },
482 
483  { dr->x + deco_diff_l, dr->y + dr->height - 1,
484  dr->x - deco_diff_r + dr->width - 1, dr->y + dr->height - 1 }
485  };
486  xcb_poly_segment(conn, parent->pixmap, parent->pm_gc, 2, segments);
487 
488  /* 6: draw the title */
489  set_font_colors(parent->pm_gc, p->color->text, p->color->background);
490  int text_offset_y = (con->deco_rect.height - config.font.height) / 2;
491 
492  struct Window *win = con->window;
493  if (win == NULL) {
494  /* we have a split container which gets a representation
495  * of its children as title
496  */
497  char *title;
498  char *tree = con_get_tree_representation(con);
499  sasprintf(&title, "i3: %s", tree);
500  free(tree);
501 
502  draw_text_ascii(title,
503  parent->pixmap, parent->pm_gc,
504  con->deco_rect.x + 2, con->deco_rect.y + text_offset_y,
505  con->deco_rect.width - 2);
506  free(title);
507 
508  goto after_title;
509  }
510 
511  if (win->name == NULL)
512  goto copy_pixmaps;
513 
514  int indent_level = 0,
515  indent_mult = 0;
516  Con *il_parent = parent;
517  if (il_parent->layout != L_STACKED) {
518  while (1) {
519  //DLOG("il_parent = %p, layout = %d\n", il_parent, il_parent->layout);
520  if (il_parent->layout == L_STACKED)
521  indent_level++;
522  if (il_parent->type == CT_WORKSPACE || il_parent->type == CT_DOCKAREA || il_parent->type == CT_OUTPUT)
523  break;
524  il_parent = il_parent->parent;
525  indent_mult++;
526  }
527  }
528  //DLOG("indent_level = %d, indent_mult = %d\n", indent_level, indent_mult);
529  int indent_px = (indent_level * 5) * indent_mult;
530 
531  draw_text(win->name,
532  parent->pixmap, parent->pm_gc,
533  con->deco_rect.x + 2 + indent_px, con->deco_rect.y + text_offset_y,
534  con->deco_rect.width - 2 - indent_px);
535 
536 after_title:
537  /* Since we don’t clip the text at all, it might in some cases be painted
538  * on the border pixels on the right side of a window. Therefore, we draw
539  * the right border again after rendering the text (and the unconnected
540  * lines in border color). */
541 
542  /* Draw a 1px separator line before and after every tab, so that tabs can
543  * be easily distinguished. */
544  if (parent->layout == L_TABBED) {
545  xcb_change_gc(conn, parent->pm_gc, XCB_GC_FOREGROUND, (uint32_t[]){ p->color->border });
546  } else {
547  xcb_change_gc(conn, parent->pm_gc, XCB_GC_FOREGROUND, (uint32_t[]){ p->color->background });
548  }
549  xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, parent->pixmap, parent->pm_gc, 6,
550  (xcb_point_t[]){
551  { dr->x + dr->width, dr->y },
552  { dr->x + dr->width, dr->y + dr->height },
553  { dr->x + dr->width - 1, dr->y },
554  { dr->x + dr->width - 1, dr->y + dr->height },
555  { dr->x, dr->y + dr->height },
556  { dr->x, dr->y },
557  });
558 
559  xcb_change_gc(conn, parent->pm_gc, XCB_GC_FOREGROUND, (uint32_t[]){ p->color->border });
560  xcb_poly_segment(conn, parent->pixmap, parent->pm_gc, 2, segments);
561 
562 copy_pixmaps:
563  xcb_copy_area(conn, con->pixmap, con->frame, con->pm_gc, 0, 0, 0, 0, con->rect.width, con->rect.height);
564 }
565 
566 /*
567  * Recursively calls x_draw_decoration. This cannot be done in x_push_node
568  * because x_push_node uses focus order to recurse (see the comment above)
569  * while drawing the decoration needs to happen in the actual order.
570  *
571  */
572 void x_deco_recurse(Con *con) {
573  Con *current;
574  bool leaf = TAILQ_EMPTY(&(con->nodes_head)) &&
575  TAILQ_EMPTY(&(con->floating_head));
576  con_state *state = state_for_frame(con->frame);
577 
578  if (!leaf) {
579  TAILQ_FOREACH(current, &(con->nodes_head), nodes)
580  x_deco_recurse(current);
581 
582  TAILQ_FOREACH(current, &(con->floating_head), floating_windows)
583  x_deco_recurse(current);
584 
585  if (state->mapped)
586  xcb_copy_area(conn, con->pixmap, con->frame, con->pm_gc, 0, 0, 0, 0, con->rect.width, con->rect.height);
587  }
588 
589  if ((con->type != CT_ROOT && con->type != CT_OUTPUT) &&
590  (!leaf || con->mapped))
591  x_draw_decoration(con);
592 }
593 
594 /*
595  * This function pushes the properties of each node of the layout tree to
596  * X11 if they have changed (like the map state, position of the window, …).
597  * It recursively traverses all children of the given node.
598  *
599  */
600 void x_push_node(Con *con) {
601  Con *current;
602  con_state *state;
603  Rect rect = con->rect;
604 
605  //DLOG("Pushing changes for node %p / %s\n", con, con->name);
606  state = state_for_frame(con->frame);
607 
608  if (state->name != NULL) {
609  DLOG("pushing name %s for con %p\n", state->name, con);
610 
611  xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->frame,
612  XCB_ATOM_WM_NAME, XCB_ATOM_STRING, 8, strlen(state->name), state->name);
613  FREE(state->name);
614  }
615 
616  if (con->window == NULL) {
617  /* Calculate the height of all window decorations which will be drawn on to
618  * this frame. */
619  uint32_t max_y = 0, max_height = 0;
620  TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
621  Rect *dr = &(current->deco_rect);
622  if (dr->y >= max_y && dr->height >= max_height) {
623  max_y = dr->y;
624  max_height = dr->height;
625  }
626  }
627  rect.height = max_y + max_height;
628  if (rect.height == 0)
629  con->mapped = false;
630  }
631 
632  /* reparent the child window (when the window was moved due to a sticky
633  * container) */
634  if (state->need_reparent && con->window != NULL) {
635  DLOG("Reparenting child window\n");
636 
637  /* Temporarily set the event masks to XCB_NONE so that we won’t get
638  * UnmapNotify events (otherwise the handler would close the container).
639  * These events are generated automatically when reparenting. */
640  uint32_t values[] = { XCB_NONE };
641  xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values);
642  xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
643 
644  xcb_reparent_window(conn, con->window->id, con->frame, 0, 0);
645 
646  values[0] = FRAME_EVENT_MASK;
647  xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values);
648  values[0] = CHILD_EVENT_MASK;
649  xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
650 
651  state->old_frame = XCB_NONE;
652  state->need_reparent = false;
653 
654  con->ignore_unmap++;
655  DLOG("ignore_unmap for reparenting of con %p (win 0x%08x) is now %d\n",
656  con, con->window->id, con->ignore_unmap);
657  }
658 
659  bool fake_notify = false;
660  /* Set new position if rect changed (and if height > 0) */
661  if (memcmp(&(state->rect), &rect, sizeof(Rect)) != 0 &&
662  rect.height > 0) {
663  /* We first create the new pixmap, then render to it, set it as the
664  * background and only afterwards change the window size. This reduces
665  * flickering. */
666 
667  /* As the pixmap only depends on the size and not on the position, it
668  * is enough to check if width/height have changed. Also, we don’t
669  * create a pixmap at all when the window is actually not visible
670  * (height == 0). */
671  if ((state->rect.width != rect.width ||
672  state->rect.height != rect.height)) {
673  if (con->pixmap == 0) {
674  con->pixmap = xcb_generate_id(conn);
675  con->pm_gc = xcb_generate_id(conn);
676  } else {
677  xcb_free_pixmap(conn, con->pixmap);
678  xcb_free_gc(conn, con->pm_gc);
679  }
680 
681  uint16_t win_depth = root_depth;
682  if (con->window)
683  win_depth = con->window->depth;
684 
685  xcb_create_pixmap(conn, win_depth, con->pixmap, con->frame, rect.width, rect.height);
686 
687  /* For the graphics context, we disable GraphicsExposure events.
688  * Those will be sent when a CopyArea request cannot be fulfilled
689  * properly due to parts of the source being unmapped or otherwise
690  * unavailable. Since we always copy from pixmaps to windows, this
691  * is not a concern for us. */
692  uint32_t values[] = { 0 };
693  xcb_create_gc(conn, con->pm_gc, con->pixmap, XCB_GC_GRAPHICS_EXPOSURES, values);
694 
695  con->pixmap_recreated = true;
696 
697  /* Don’t render the decoration for windows inside a stack which are
698  * not visible right now */
699  if (!con->parent ||
700  con->parent->layout != L_STACKED ||
701  TAILQ_FIRST(&(con->parent->focus_head)) == con)
702  /* Render the decoration now to make the correct decoration visible
703  * from the very first moment. Later calls will be cached, so this
704  * doesn’t hurt performance. */
705  x_deco_recurse(con);
706  }
707 
708  DLOG("setting rect (%d, %d, %d, %d)\n", rect.x, rect.y, rect.width, rect.height);
709  /* flush to ensure that the following commands are sent in a single
710  * buffer and will be processed directly afterwards (the contents of a
711  * window get lost when resizing it, therefore we want to provide it as
712  * fast as possible) */
713  xcb_flush(conn);
714  xcb_set_window_rect(conn, con->frame, rect);
715  if (con->pixmap != XCB_NONE)
716  xcb_copy_area(conn, con->pixmap, con->frame, con->pm_gc, 0, 0, 0, 0, con->rect.width, con->rect.height);
717  xcb_flush(conn);
718 
719  memcpy(&(state->rect), &rect, sizeof(Rect));
720  fake_notify = true;
721  }
722 
723  /* dito, but for child windows */
724  if (con->window != NULL &&
725  memcmp(&(state->window_rect), &(con->window_rect), sizeof(Rect)) != 0) {
726  DLOG("setting window rect (%d, %d, %d, %d)\n",
727  con->window_rect.x, con->window_rect.y, con->window_rect.width, con->window_rect.height);
729  memcpy(&(state->window_rect), &(con->window_rect), sizeof(Rect));
730  fake_notify = true;
731  }
732 
733  /* Map if map state changed, also ensure that the child window
734  * is changed if we are mapped *and* in initial state (meaning the
735  * container was empty before, but now got a child). Unmaps are handled in
736  * x_push_node_unmaps(). */
737  if ((state->mapped != con->mapped || (con->mapped && state->initial)) &&
738  con->mapped) {
739  xcb_void_cookie_t cookie;
740 
741  if (con->window != NULL) {
742  /* Set WM_STATE_NORMAL because GTK applications don’t want to
743  * drag & drop if we don’t. Also, xprop(1) needs it. */
744  long data[] = { XCB_ICCCM_WM_STATE_NORMAL, XCB_NONE };
745  xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
746  A_WM_STATE, A_WM_STATE, 32, 2, data);
747  }
748 
749  uint32_t values[1];
750  if (!state->child_mapped && con->window != NULL) {
751  cookie = xcb_map_window(conn, con->window->id);
752 
753  /* We are interested in EnterNotifys as soon as the window is
754  * mapped */
755  values[0] = CHILD_EVENT_MASK;
756  xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
757  DLOG("mapping child window (serial %d)\n", cookie.sequence);
758  state->child_mapped = true;
759  }
760 
761  cookie = xcb_map_window(conn, con->frame);
762 
763  values[0] = FRAME_EVENT_MASK;
764  xcb_change_window_attributes(conn, con->frame, XCB_CW_EVENT_MASK, values);
765 
766  /* copy the pixmap contents to the frame window immediately after mapping */
767  if (con->pixmap != XCB_NONE)
768  xcb_copy_area(conn, con->pixmap, con->frame, con->pm_gc, 0, 0, 0, 0, con->rect.width, con->rect.height);
769  xcb_flush(conn);
770 
771  DLOG("mapping container %08x (serial %d)\n", con->frame, cookie.sequence);
772  state->mapped = con->mapped;
773  }
774 
775  state->unmap_now = (state->mapped != con->mapped) && !con->mapped;
776 
777  if (fake_notify) {
778  DLOG("Sending fake configure notify\n");
780  }
781 
782  /* Handle all children and floating windows of this node. We recurse
783  * in focus order to display the focused client in a stack first when
784  * switching workspaces (reduces flickering). */
785  TAILQ_FOREACH(current, &(con->focus_head), focused)
786  x_push_node(current);
787 }
788 
789 /*
790  * Same idea as in x_push_node(), but this function only unmaps windows. It is
791  * necessary to split this up to handle new fullscreen clients properly: The
792  * new window needs to be mapped and focus needs to be set *before* the
793  * underlying windows are unmapped. Otherwise, focus will revert to the
794  * PointerRoot and will then be set to the new window, generating unnecessary
795  * FocusIn/FocusOut events.
796  *
797  */
798 static void x_push_node_unmaps(Con *con) {
799  Con *current;
800  con_state *state;
801 
802  //DLOG("Pushing changes (with unmaps) for node %p / %s\n", con, con->name);
803  state = state_for_frame(con->frame);
804 
805  /* map/unmap if map state changed, also ensure that the child window
806  * is changed if we are mapped *and* in initial state (meaning the
807  * container was empty before, but now got a child) */
808  if (state->unmap_now) {
809  xcb_void_cookie_t cookie;
810  if (con->window != NULL) {
811  /* Set WM_STATE_WITHDRAWN, it seems like Java apps need it */
812  long data[] = { XCB_ICCCM_WM_STATE_WITHDRAWN, XCB_NONE };
813  xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
814  A_WM_STATE, A_WM_STATE, 32, 2, data);
815  }
816 
817  cookie = xcb_unmap_window(conn, con->frame);
818  DLOG("unmapping container %p / %s (serial %d)\n", con, con->name, cookie.sequence);
819  /* we need to increase ignore_unmap for this container (if it
820  * contains a window) and for every window "under" this one which
821  * contains a window */
822  if (con->window != NULL) {
823  con->ignore_unmap++;
824  DLOG("ignore_unmap for con %p (frame 0x%08x) now %d\n", con, con->frame, con->ignore_unmap);
825  }
826  state->mapped = con->mapped;
827  }
828 
829  /* handle all children and floating windows of this node */
830  TAILQ_FOREACH(current, &(con->nodes_head), nodes)
831  x_push_node_unmaps(current);
832 
833  TAILQ_FOREACH(current, &(con->floating_head), floating_windows)
834  x_push_node_unmaps(current);
835 }
836 
837 /*
838  * Pushes all changes (state of each node, see x_push_node() and the window
839  * stack) to X11.
840  *
841  * NOTE: We need to push the stack first so that the windows have the correct
842  * stacking order. This is relevant for workspace switching where we map the
843  * windows because mapping may generate EnterNotify events. When they are
844  * generated in the wrong order, this will cause focus problems when switching
845  * workspaces.
846  *
847  */
848 void x_push_changes(Con *con) {
849  con_state *state;
850  xcb_query_pointer_cookie_t pointercookie;
851 
852  /* If we need to warp later, we request the pointer position as soon as possible */
853  if (warp_to) {
854  pointercookie = xcb_query_pointer(conn, root);
855  }
856 
857  DLOG("-- PUSHING WINDOW STACK --\n");
858  //DLOG("Disabling EnterNotify\n");
859  uint32_t values[1] = { XCB_NONE };
860  CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
861  if (state->mapped)
862  xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values);
863  }
864  //DLOG("Done, EnterNotify disabled\n");
865  bool order_changed = false;
866  bool stacking_changed = false;
867 
868  /* count first, necessary to (re)allocate memory for the bottom-to-top
869  * stack afterwards */
870  int cnt = 0;
871  CIRCLEQ_FOREACH_REVERSE(state, &state_head, state)
872  if (state->con && state->con->window)
873  cnt++;
874 
875  if (cnt != btt_stack_num) {
876  btt_stack = srealloc(btt_stack, sizeof(xcb_window_t) * cnt);
877  btt_stack_num = cnt;
878  }
879 
880  xcb_window_t *walk = btt_stack;
881 
882  /* X11 correctly represents the stack if we push it from bottom to top */
883  CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
884  if (state->con && state->con->window)
885  memcpy(walk++, &(state->con->window->id), sizeof(xcb_window_t));
886 
887  //DLOG("stack: 0x%08x\n", state->id);
888  con_state *prev = CIRCLEQ_PREV(state, state);
889  con_state *old_prev = CIRCLEQ_PREV(state, old_state);
890  if (prev != old_prev)
891  order_changed = true;
892  if ((state->initial || order_changed) && prev != CIRCLEQ_END(&state_head)) {
893  stacking_changed = true;
894  //DLOG("Stacking 0x%08x above 0x%08x\n", prev->id, state->id);
895  uint32_t mask = 0;
896  mask |= XCB_CONFIG_WINDOW_SIBLING;
897  mask |= XCB_CONFIG_WINDOW_STACK_MODE;
898  uint32_t values[] = {state->id, XCB_STACK_MODE_ABOVE};
899 
900  xcb_configure_window(conn, prev->id, mask, values);
901  }
902  state->initial = false;
903  }
904 
905  /* If we re-stacked something (or a new window appeared), we need to update
906  * the _NET_CLIENT_LIST_STACKING hint */
907  if (stacking_changed)
909 
910  DLOG("PUSHING CHANGES\n");
911  x_push_node(con);
912 
913  if (warp_to) {
914  xcb_query_pointer_reply_t *pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL);
915  if (!pointerreply) {
916  ELOG("Could not query pointer position, not warping pointer\n");
917  } else {
918  int mid_x = warp_to->x + (warp_to->width / 2);
919  int mid_y = warp_to->y + (warp_to->height / 2);
920 
921  Output *current = get_output_containing(pointerreply->root_x, pointerreply->root_y);
922  Output *target = get_output_containing(mid_x, mid_y);
923  if (current != target) {
924  /* Ignore MotionNotify events generated by warping */
925  xcb_change_window_attributes(conn, root, XCB_CW_EVENT_MASK, (uint32_t[]){ XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT });
926  xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0, mid_x, mid_y);
927  xcb_change_window_attributes(conn, root, XCB_CW_EVENT_MASK, (uint32_t[]){ ROOT_EVENT_MASK });
928  }
929  }
930  warp_to = NULL;
931  }
932 
933  //DLOG("Re-enabling EnterNotify\n");
934  values[0] = FRAME_EVENT_MASK;
935  CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
936  if (state->mapped)
937  xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values);
938  }
939  //DLOG("Done, EnterNotify re-enabled\n");
940 
941  x_deco_recurse(con);
942 
943  xcb_window_t to_focus = focused->frame;
944  if (focused->window != NULL)
945  to_focus = focused->window->id;
946 
947  if (focused_id != to_focus) {
948  if (!focused->mapped) {
949  DLOG("Not updating focus (to %p / %s), focused window is not mapped.\n", focused, focused->name);
950  /* Invalidate focused_id to correctly focus new windows with the same ID */
951  focused_id = XCB_NONE;
952  } else {
953  bool set_focus = true;
954  if (focused->window != NULL &&
956  DLOG("Updating focus by sending WM_TAKE_FOCUS to window 0x%08x (focused: %p / %s)\n",
957  to_focus, focused, focused->name);
958  send_take_focus(to_focus);
959  set_focus = !focused->window->doesnt_accept_focus;
960  DLOG("set_focus = %d\n", set_focus);
961  }
962 
963  if (set_focus) {
964  DLOG("Updating focus (focused: %p / %s) to X11 window 0x%08x\n", focused, focused->name, to_focus);
965  /* We remove XCB_EVENT_MASK_FOCUS_CHANGE from the event mask to get
966  * no focus change events for our own focus changes. We only want
967  * these generated by the clients. */
968  if (focused->window != NULL) {
969  values[0] = CHILD_EVENT_MASK & ~(XCB_EVENT_MASK_FOCUS_CHANGE);
970  xcb_change_window_attributes(conn, focused->window->id, XCB_CW_EVENT_MASK, values);
971  }
972  xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, to_focus, XCB_CURRENT_TIME);
973  if (focused->window != NULL) {
974  values[0] = CHILD_EVENT_MASK;
975  xcb_change_window_attributes(conn, focused->window->id, XCB_CW_EVENT_MASK, values);
976  }
977 
978  ewmh_update_active_window(to_focus);
979  }
980 
982  }
983  }
984 
985  if (focused_id == XCB_NONE) {
986  DLOG("Still no window focused, better set focus to the root window\n");
987  xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
988  focused_id = root;
989  }
990 
991  xcb_flush(conn);
992  DLOG("ENDING CHANGES\n");
993 
994  /* Disable EnterWindow events for windows which will be unmapped in
995  * x_push_node_unmaps() now. Unmapping windows happens when switching
996  * workspaces. We want to avoid getting EnterNotifies during that phase
997  * because they would screw up our focus. One of these cases is having a
998  * stack with two windows. If the first window is focused and gets
999  * unmapped, the second one appears under the cursor and therefore gets an
1000  * EnterNotify event. */
1001  values[0] = FRAME_EVENT_MASK & ~XCB_EVENT_MASK_ENTER_WINDOW;
1002  CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
1003  if (!state->unmap_now)
1004  continue;
1005  xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values);
1006  }
1007 
1008  /* Push all pending unmaps */
1009  x_push_node_unmaps(con);
1010 
1011  /* save the current stack as old stack */
1012  CIRCLEQ_FOREACH(state, &state_head, state) {
1013  CIRCLEQ_REMOVE(&old_state_head, state, old_state);
1014  CIRCLEQ_INSERT_TAIL(&old_state_head, state, old_state);
1015  }
1016  //CIRCLEQ_FOREACH(state, &old_state_head, old_state) {
1017  // DLOG("old stack: 0x%08x\n", state->id);
1018  //}
1019 
1020  xcb_flush(conn);
1021 }
1022 
1023 /*
1024  * Raises the specified container in the internal stack of X windows. The
1025  * next call to x_push_changes() will make the change visible in X11.
1026  *
1027  */
1028 void x_raise_con(Con *con) {
1029  con_state *state;
1030  state = state_for_frame(con->frame);
1031  //DLOG("raising in new stack: %p / %s / %s / xid %08x\n", con, con->name, con->window ? con->window->name_json : "", state->id);
1032 
1033  CIRCLEQ_REMOVE(&state_head, state, state);
1034  CIRCLEQ_INSERT_HEAD(&state_head, state, state);
1035 }
1036 
1037 /*
1038  * Sets the WM_NAME property (so, no UTF8, but used only for debugging anyways)
1039  * of the given name. Used for properly tagging the windows for easily spotting
1040  * i3 windows in xwininfo -root -all.
1041  *
1042  */
1043 void x_set_name(Con *con, const char *name) {
1044  struct con_state *state;
1045 
1046  if ((state = state_for_frame(con->frame)) == NULL) {
1047  ELOG("window state not found\n");
1048  return;
1049  }
1050 
1051  FREE(state->name);
1052  state->name = sstrdup(name);
1053 }
1054 
1055 /*
1056  * Set up the I3_SHMLOG_PATH atom.
1057  *
1058  */
1060  xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
1061  A_I3_SHMLOG_PATH, A_UTF8_STRING, 8,
1062  strlen(shmlogname), shmlogname);
1063 }
1064 
1065 /*
1066  * Sets up i3 specific atoms (I3_SOCKET_PATH and I3_CONFIG_PATH)
1067  *
1068  */
1069 void x_set_i3_atoms(void) {
1070  pid_t pid = getpid();
1071  xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A_I3_SOCKET_PATH, A_UTF8_STRING, 8,
1072  (current_socketpath == NULL ? 0 : strlen(current_socketpath)),
1074  xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A_I3_PID, XCB_ATOM_CARDINAL, 32, 1, &pid);
1075  xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A_I3_CONFIG_PATH, A_UTF8_STRING, 8,
1078 }
1079 
1080 /*
1081  * Set warp_to coordinates. This will trigger on the next call to
1082  * x_push_changes().
1083  *
1084  */
1086 {
1087  warp_to = rect;
1088 }
1089 
1090 /*
1091  * Applies the given mask to the event mask of every i3 window decoration X11
1092  * window. This is useful to disable EnterNotify while resizing so that focus
1093  * is untouched.
1094  *
1095  */
1096 void x_mask_event_mask(uint32_t mask) {
1097  uint32_t values[] = { FRAME_EVENT_MASK & mask };
1098 
1099  con_state *state;
1100  CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
1101  if (state->mapped)
1102  xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values);
1103  }
1104 }