i3
move.c
Go to the documentation of this file.
1 #undef I3__FILE__
2 #define I3__FILE__ "move.c"
3 /*
4  * vim:ts=4:sw=4:expandtab
5  *
6  * i3 - an improved dynamic tiling window manager
7  * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
8  *
9  * move.c: Moving containers into some direction.
10  *
11  */
12 #include "all.h"
13 
14 typedef enum { BEFORE, AFTER } position_t;
15 
16 /*
17  * This function detaches 'con' from its parent and inserts it either before or
18  * after 'target'.
19  *
20  */
21 static void insert_con_into(Con *con, Con *target, position_t position) {
22  Con *parent = target->parent;
23  /* We need to preserve the old con->parent. While it might still be used to
24  * insert the entry before/after it, we call the on_remove_child callback
25  * afterwards which might then close the con if it is empty. */
26  Con *old_parent = con->parent;
27 
28  con_detach(con);
29  con_fix_percent(con->parent);
30 
31  /* When moving to a workspace, we respect the user’s configured
32  * workspace_layout */
33  if (parent->type == CT_WORKSPACE) {
34  Con *split = workspace_attach_to(parent);
35  if (split != parent) {
36  DLOG("Got a new split con, using that one instead\n");
37  con->parent = split;
38  con_attach(con, split, false);
39  DLOG("attached\n");
40  con->percent = 0.0;
41  con_fix_percent(split);
42  con = split;
43  DLOG("ok, continuing with con %p instead\n", con);
44  con_detach(con);
45  }
46  }
47 
48  con->parent = parent;
49 
50  if (position == BEFORE) {
51  TAILQ_INSERT_BEFORE(target, con, nodes);
52  TAILQ_INSERT_HEAD(&(parent->focus_head), con, focused);
53  } else if (position == AFTER) {
54  TAILQ_INSERT_AFTER(&(parent->nodes_head), target, con, nodes);
55  TAILQ_INSERT_HEAD(&(parent->focus_head), con, focused);
56  }
57 
58  /* Pretend the con was just opened with regards to size percent values.
59  * Since the con is moved to a completely different con, the old value
60  * does not make sense anyways. */
61  con->percent = 0.0;
62  con_fix_percent(parent);
63 
64  CALL(old_parent, on_remove_child);
65 }
66 
67 /*
68  * This function detaches 'con' from its parent and puts it in the given
69  * workspace. Position is determined by the direction of movement into the
70  * workspace container.
71  *
72  */
73 static void attach_to_workspace(Con *con, Con *ws, direction_t direction) {
74  con_detach(con);
75  con_fix_percent(con->parent);
76 
77  CALL(con->parent, on_remove_child);
78 
79  con->parent = ws;
80 
81  if (direction == D_RIGHT || direction == D_DOWN) {
82  TAILQ_INSERT_HEAD(&(ws->nodes_head), con, nodes);
83  TAILQ_INSERT_HEAD(&(ws->focus_head), con, focused);
84  } else {
85  TAILQ_INSERT_TAIL(&(ws->nodes_head), con, nodes);
86  TAILQ_INSERT_TAIL(&(ws->focus_head), con, focused);
87  }
88 
89  /* Pretend the con was just opened with regards to size percent values.
90  * Since the con is moved to a completely different con, the old value
91  * does not make sense anyways. */
92  con->percent = 0.0;
93  con_fix_percent(ws);
94 }
95 
96 /*
97  * Moves the given container to the closest output in the given direction if
98  * such an output exists.
99  *
100  */
101 static void move_to_output_directed(Con *con, direction_t direction) {
102  Con *old_ws = con_get_workspace(con);
103  Con *current_output_con = con_get_output(con);
104  Output *current_output = get_output_by_name(current_output_con->name);
105  Output *output = get_output_next(direction, current_output, CLOSEST_OUTPUT);
106 
107  if (!output) {
108  DLOG("No output in this direction found. Not moving.\n");
109  return;
110  }
111 
112  Con *ws = NULL;
114 
115  if (!ws) {
116  DLOG("No workspace on output in this direction found. Not moving.\n");
117  return;
118  }
119 
120  attach_to_workspace(con, ws, direction);
121 
122  /* fix the focus stack */
123  con_focus(con);
124 
125  /* force re-painting the indicators */
126  FREE(con->deco_render_params);
127 
129 
130  ipc_send_workspace_focus_event(ws, old_ws);
131 }
132 
133 /*
134  * Moves the current container in the given direction (D_LEFT, D_RIGHT,
135  * D_UP, D_DOWN).
136  *
137  */
138 void tree_move(int direction) {
139  DLOG("Moving in direction %d\n", direction);
140  /* 1: get the first parent with the same orientation */
141  Con *con = focused;
142 
143  if (con->type == CT_WORKSPACE) {
144  DLOG("Not moving workspace\n");
145  return;
146  }
147 
148  if (con->parent->type == CT_WORKSPACE && con_num_children(con->parent) == 1) {
149  /* This is the only con on this workspace */
150  move_to_output_directed(con, direction);
151  return;
152  }
153 
154  orientation_t o = (direction == D_LEFT || direction == D_RIGHT ? HORIZ : VERT);
155 
156  Con *same_orientation = con_parent_with_orientation(con, o);
157  /* The do {} while is used to 'restart' at this point with a different
158  * same_orientation, see the very last lines before the end of this block
159  * */
160  do {
161  /* There is no parent container with the same orientation */
162  if (!same_orientation) {
163  if (con_is_floating(con)) {
164  /* this is a floating con, we just disable floating */
165  floating_disable(con, true);
166  return;
167  }
168  if (con_inside_floating(con)) {
169  /* 'con' should be moved out of a floating container */
170  DLOG("Inside floating, moving to workspace\n");
171  attach_to_workspace(con, con_get_workspace(con), direction);
172  goto end;
173  }
174  DLOG("Force-changing orientation\n");
176  same_orientation = con_parent_with_orientation(con, o);
177  }
178 
179  /* easy case: the move is within this container */
180  if (same_orientation == con->parent) {
181  DLOG("We are in the same container\n");
182  Con *swap;
183  if ((swap = (direction == D_LEFT || direction == D_UP ?
184  TAILQ_PREV(con, nodes_head, nodes) :
185  TAILQ_NEXT(con, nodes)))) {
186  if (!con_is_leaf(swap)) {
188  goto end;
189  }
190  if (direction == D_LEFT || direction == D_UP)
191  TAILQ_SWAP(swap, con, &(swap->parent->nodes_head), nodes);
192  else TAILQ_SWAP(con, swap, &(swap->parent->nodes_head), nodes);
193 
194  TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
195  TAILQ_INSERT_HEAD(&(swap->parent->focus_head), con, focused);
196 
197  DLOG("Swapped.\n");
198  return;
199  }
200 
201  if (con->parent == con_get_workspace(con)) {
202  /* If we couldn't find a place to move it on this workspace,
203  * try to move it to a workspace on a different output */
204  move_to_output_directed(con, direction);
205  return;
206  }
207 
208  /* If there was no con with which we could swap the current one,
209  * search again, but starting one level higher. */
210  same_orientation = con_parent_with_orientation(con->parent, o);
211  }
212  } while (same_orientation == NULL);
213 
214  /* this time, we have to move to another container */
215  /* This is the container *above* 'con' (an ancestor of con) which is inside
216  * 'same_orientation' */
217  Con *above = con;
218  while (above->parent != same_orientation)
219  above = above->parent;
220 
221  /* Enforce the fullscreen focus restrictions. */
223  LOG("Cannot move out of fullscreen container\n");
224  return;
225  }
226 
227  DLOG("above = %p\n", above);
228  Con *next;
229  position_t position;
230  if (direction == D_UP || direction == D_LEFT) {
231  position = BEFORE;
232  next = TAILQ_PREV(above, nodes_head, nodes);
233  } else {
234  position = AFTER;
235  next = TAILQ_NEXT(above, nodes);
236  }
237 
238  /* special case: there is a split container in the direction we are moving
239  * to, so descend and append */
240  if (next && !con_is_leaf(next))
242  else
243  insert_con_into(con, above, position);
244 
245 end:
246  /* We need to call con_focus() to fix the focus stack "above" the container
247  * we just inserted the focused container into (otherwise, the parent
248  * container(s) would still point to the old container(s)). */
249  con_focus(con);
250 
251  /* force re-painting the indicators */
252  FREE(con->deco_render_params);
253 
255 }