git.sur5r.net Git - i3/i3/blob - src/commands.c

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * © 2009 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  */
  11 #include <stdbool.h>
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <assert.h>
  15 #include <unistd.h>
  16 #include <string.h>
  17
  18 #include <xcb/xcb.h>
  19
  20 #include "util.h"
  21 #include "data.h"
  22 #include "table.h"
  23 #include "layout.h"
  24 #include "i3.h"
  25
  26 static bool focus_window_in_container(xcb_connection_t *connection, Container *container,
  27                 direction_t direction) {
  28         /* If this container is empty, we’re done */
  29         if (container->currently_focused == NULL)
  30                 return false;
  31
  32         Client *candidad = NULL;
  33         if (direction == D_UP)
  34                 candidad = CIRCLEQ_PREV(container->currently_focused, clients);
  35         else if (direction == D_DOWN)
  36                 candidad = CIRCLEQ_NEXT(container->currently_focused, clients);
  37         else printf("Direction not implemented!\n");
  38
  39         /* If we don’t have anything to select, we’re done */
  40         if (candidad == CIRCLEQ_END(&(container->clients)))
  41                 return false;
  42
  43         /* Set focus if we could successfully move */
  44         set_focus(connection, candidad);
  45
  46         return true;
  47 }
  48
  49 static void focus_window(xcb_connection_t *connection, direction_t direction) {
  50         printf("focusing direction %d\n", direction);
  51         /* TODO: for horizontal default layout, this has to be expanded to LEFT/RIGHT */
  52         if (direction == D_UP || direction == D_DOWN) {
  53                 /* Let’s see if we can perform up/down focus in the current container */
  54                 Container *container = CUR_CELL;
  55
  56                 /* There always is a container. If not, current_col or current_row is wrong */
  57                 assert(container != NULL);
  58
  59                 if (focus_window_in_container(connection, container, direction))
  60                         return;
  61
  62                 if (direction == D_DOWN && cell_exists(current_col, current_row+1))
  63                         current_row++;
  64                 else if (direction == D_UP && cell_exists(current_col, current_row-1))
  65                         current_row--;
  66         } else if (direction == D_LEFT || direction == D_RIGHT) {
  67                 if (direction == D_RIGHT && cell_exists(current_col+1, current_row))
  68                         current_col++;
  69                 else if (direction == D_LEFT && cell_exists(current_col-1, current_row))
  70                         current_col--;
  71                 else {
  72                         printf("nah, not possible\n");
  73                         return;
  74                 }
  75         } else {
  76                 printf("direction unhandled\n");
  77                 return;
  78         }
  79
  80         if (CUR_CELL->currently_focused != NULL)
  81                 set_focus(connection, CUR_CELL->currently_focused);
  82 }
  83
  84 /*
  85  * Tries to move the window inside its current container.
  86  *
  87  * Returns true if the window could be moved, false otherwise.
  88  *
  89  */
  90 static bool move_current_window_in_container(xcb_connection_t *connection, Client *client,
  91                 direction_t direction) {
  92         assert(client->container != NULL);
  93
  94         Client *other = (direction == D_UP ? CIRCLEQ_PREV(client, clients) :
  95                                                 CIRCLEQ_NEXT(client, clients));
  96
  97         if (other == CIRCLEQ_END(&(client->container->clients)))
  98                 return false;
  99
 100         printf("i can do that\n");
 101         /* We can move the client inside its current container */
 102         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 103         if (direction == D_UP)
 104                 CIRCLEQ_INSERT_BEFORE(&(client->container->clients), other, client, clients);
 105         else CIRCLEQ_INSERT_AFTER(&(client->container->clients), other, client, clients);
 106         render_layout(connection);
 107         return true;
 108 }
 109
 110 /*
 111  * Moves the current window to the given direction, creating a column/row if
 112  * necessary
 113  *
 114  */
 115 static void move_current_window(xcb_connection_t *connection, direction_t direction) {
 116         printf("moving window to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 117                                         (direction == D_LEFT ? "left" : "right"))));
 118         /* Get current window */
 119         Container *container = CUR_CELL,
 120                   *new = NULL;
 121
 122         /* There has to be a container, see focus_window() */
 123         assert(container != NULL);
 124
 125         /* If there is no window or the dock window is focused, we’re done */
 126         if (container->currently_focused == NULL ||
 127             container->currently_focused->dock)
 128                 return;
 129
 130         /* As soon as the client is moved away, the next client in the old
 131          * container needs to get focus, if any. Therefore, we save it here. */
 132         Client *current_client = container->currently_focused;
 133         Client *to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 134         if (to_focus == NULL)
 135                 to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 136
 137         switch (direction) {
 138                 case D_LEFT:
 139                         if (current_col == 0)
 140                                 return;
 141
 142                         new = CUR_TABLE[--current_col][current_row];
 143                         break;
 144                 case D_RIGHT:
 145                         if (current_col == (c_ws->cols-1))
 146                                 expand_table_cols(c_ws);
 147
 148                         new = CUR_TABLE[++current_col][current_row];
 149                         break;
 150                 case D_UP:
 151                         /* TODO: if we’re at the up-most position, move the rest of the table down */
 152                         if (move_current_window_in_container(connection, current_client, D_UP) ||
 153                                 current_row == 0)
 154                                 return;
 155
 156                         new = CUR_TABLE[current_col][--current_row];
 157                         break;
 158                 case D_DOWN:
 159                         if (move_current_window_in_container(connection, current_client, D_DOWN))
 160                                 return;
 161
 162                         if (current_row == (c_ws->rows-1))
 163                                 expand_table_rows(c_ws);
 164
 165                         new = CUR_TABLE[current_col][++current_row];
 166                         break;
 167         }
 168
 169         /* Remove it from the old container and put it into the new one */
 170         CIRCLEQ_REMOVE(&(container->clients), current_client, clients);
 171         CIRCLEQ_INSERT_TAIL(&(new->clients), current_client, clients);
 172
 173         /* Update data structures */
 174         current_client->container = new;
 175         container->currently_focused = to_focus;
 176         new->currently_focused = current_client;
 177
 178         /* delete all empty columns/rows */
 179         cleanup_table(connection, container->workspace);
 180         render_layout(connection);
 181
 182         set_focus(connection, current_client);
 183 }
 184
 185 /*
 186  * "Snaps" the current container (not possible for windows, because it works at table base)
 187  * to the given direction, that is, adjusts cellspan/rowspan
 188  *
 189  */
 190 static void snap_current_container(xcb_connection_t *connection, direction_t direction) {
 191         printf("snapping container to direction %d\n", direction);
 192
 193         Container *container = CUR_CELL;
 194
 195         assert(container != NULL);
 196
 197         switch (direction) {
 198                 case D_LEFT:
 199                         /* Snap to the left is actually a move to the left and then a snap right */
 200                         move_current_window(connection, D_LEFT);
 201                         snap_current_container(connection, D_RIGHT);
 202                         return;
 203                 case D_RIGHT:
 204                         /* Check if the cell is used */
 205                         if (!cell_exists(container->col + 1, container->row) ||
 206                                 CUR_TABLE[container->col+1][container->row]->currently_focused != NULL) {
 207                                 printf("cannot snap to right - the cell is already used\n");
 208                                 return;
 209                         }
 210
 211                         /* Check if there are other cells with rowspan, which are in our way.
 212                          * If so, reduce their rowspan. */
 213                         for (int i = container->row-1; i >= 0; i--) {
 214                                 printf("we got cell %d, %d with rowspan %d\n",
 215                                                 container->col+1, i, CUR_TABLE[container->col+1][i]->rowspan);
 216                                 while ((CUR_TABLE[container->col+1][i]->rowspan-1) >= (container->row - i))
 217                                         CUR_TABLE[container->col+1][i]->rowspan--;
 218                                 printf("new rowspan = %d\n", CUR_TABLE[container->col+1][i]->rowspan);
 219                         }
 220
 221                         container->colspan++;
 222                         break;
 223                 case D_UP:
 224                         move_current_window(connection, D_UP);
 225                         snap_current_container(connection, D_DOWN);
 226                         return;
 227                 case D_DOWN:
 228                         printf("snapping down\n");
 229                         if (!cell_exists(container->col, container->row+1) ||
 230                                 CUR_TABLE[container->col][container->row+1]->currently_focused != NULL) {
 231                                 printf("cannot snap down - the cell is already used\n");
 232                                 return;
 233                         }
 234
 235                         for (int i = container->col-1; i >= 0; i--) {
 236                                 printf("we got cell %d, %d with colspan %d\n",
 237                                                 i, container->row+1, CUR_TABLE[i][container->row+1]->colspan);
 238                                 while ((CUR_TABLE[i][container->row+1]->colspan-1) >= (container->col - i))
 239                                         CUR_TABLE[i][container->row+1]->colspan--;
 240                                 printf("new colspan = %d\n", CUR_TABLE[i][container->row+1]->colspan);
 241
 242                         }
 243
 244                         container->rowspan++;
 245                         break;
 246         }
 247
 248         render_layout(connection);
 249 }
 250
 251 static void show_workspace(xcb_connection_t *conn, int workspace) {
 252         Client *client;
 253         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 254         /* t_ws (to workspace) is just a convenience pointer to the workspace we’re switching to */
 255         Workspace *t_ws = &(workspaces[workspace-1]);
 256
 257         printf("show_workspace(%d)\n", workspace);
 258
 259         /* Store current_row/current_col */
 260         c_ws->current_row = current_row;
 261         c_ws->current_col = current_col;
 262
 263         /* Check if the workspace has not been used yet */
 264         if (t_ws->screen == NULL) {
 265                 printf("initializing new workspace, setting num to %d\n", workspace);
 266                 t_ws->screen = c_ws->screen;
 267                 /* Copy the dimensions from the virtual screen */
 268                 memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
 269         }
 270
 271         if (c_ws->screen != t_ws->screen) {
 272                 /* We need to switch to the other screen first */
 273                 printf("Just moving over to other screen.\n");
 274                 c_ws = &(workspaces[t_ws->screen->current_workspace]);
 275                 current_col = c_ws->current_col;
 276                 current_row = c_ws->current_row;
 277                 if (CUR_CELL->currently_focused != NULL)
 278                         warp_pointer_into(conn, CUR_CELL->currently_focused);
 279                 else {
 280                         Rect *dims = &(c_ws->screen->rect);
 281                         xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0,
 282                                          dims->x + (dims->width / 2), dims->y + (dims->height / 2));
 283                 }
 284         }
 285
 286         /* Check if we need to change something or if we’re already there */
 287         if (c_ws->screen->current_workspace == (workspace-1))
 288                 return;
 289
 290         t_ws->screen->current_workspace = workspace-1;
 291
 292         /* TODO: does grabbing the server actually bring us any (speed)advantages? */
 293         //xcb_grab_server(conn);
 294
 295         /* Unmap all clients of the current workspace */
 296         for (int cols = 0; cols < c_ws->cols; cols++)
 297                 for (int rows = 0; rows < c_ws->rows; rows++)
 298                         CIRCLEQ_FOREACH(client, &(c_ws->table[cols][rows]->clients), clients)
 299                                 xcb_unmap_window(conn, client->frame);
 300
 301         /* Unmap the stack windows on the current workspace, if any */
 302         struct Stack_Window *stack_win;
 303         SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 304                 if (stack_win->container->workspace == c_ws)
 305                         xcb_unmap_window(conn, stack_win->window);
 306
 307         c_ws = &workspaces[workspace-1];
 308         current_row = c_ws->current_row;
 309         current_col = c_ws->current_col;
 310         printf("new current row = %d, current col = %d\n", current_row, current_col);
 311
 312         /* Map all clients on the new workspace */
 313         for (int cols = 0; cols < c_ws->cols; cols++)
 314                 for (int rows = 0; rows < c_ws->rows; rows++)
 315                         CIRCLEQ_FOREACH(client, &(c_ws->table[cols][rows]->clients), clients)
 316                                 xcb_map_window(conn, client->frame);
 317
 318         /* Map all stack windows, if any */
 319         SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 320                 if (stack_win->container->workspace == c_ws)
 321                         xcb_map_window(conn, stack_win->window);
 322
 323         /* Restore focus on the new workspace */
 324         if (CUR_CELL->currently_focused != NULL)
 325                 xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, CUR_CELL->currently_focused->child, XCB_CURRENT_TIME);
 326         else xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
 327
 328         //xcb_ungrab_server(conn);
 329
 330         render_layout(conn);
 331 }
 332
 333 /*
 334  * Parses a command, see file CMDMODE for more information
 335  *
 336  */
 337 void parse_command(xcb_connection_t *conn, const char *command) {
 338         printf("--- parsing command \"%s\" ---\n", command);
 339         /* Hmm, just to be sure */
 340         if (command[0] == '\0')
 341                 return;
 342
 343         /* Is it an <exec>? */
 344         if (strncmp(command, "exec ", strlen("exec ")) == 0) {
 345                 printf("starting \"%s\"\n", command + strlen("exec "));
 346                 start_application(command+strlen("exec "));
 347                 return;
 348         }
 349
 350         /* Is it <restart>? */
 351         if (strncmp(command, "restart", strlen("restart")) == 0) {
 352                 printf("restarting \"%s\"...\n", application_path);
 353                 execl(application_path, application_path, NULL);
 354                 /* not reached */
 355         }
 356
 357         /* Is it 'f' for fullscreen? */
 358         if (command[0] == 'f') {
 359                 if (CUR_CELL->currently_focused == NULL)
 360                         return;
 361                 toggle_fullscreen(conn, CUR_CELL->currently_focused);
 362                 return;
 363         }
 364
 365         /* Is it just 's' for stacking or 'd' for default? */
 366         if ((command[0] == 's' || command[0] == 'd') && (command[1] == '\0')) {
 367                 printf("Switching mode for current container\n");
 368                 switch_layout_mode(conn, CUR_CELL, (command[0] == 's' ? MODE_STACK : MODE_DEFAULT));
 369                 return;
 370         }
 371
 372         /* Is it a <with>? */
 373         if (command[0] == 'w') {
 374                 /* TODO: implement */
 375                 printf("not yet implemented.\n");
 376                 return;
 377         }
 378
 379         /* It's a normal <cmd> */
 380         int times;
 381         char *rest = NULL;
 382         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
 383         direction_t direction;
 384         times = strtol(command, &rest, 10);
 385         if (rest == NULL) {
 386                 printf("Invalid command (\"%s\")\n", command);
 387                 return;
 388         }
 389         if (*rest == 'm' || *rest == 's') {
 390                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
 391                 rest++;
 392         }
 393
 394         if (*rest == '\0') {
 395                 /* No rest? This was a tag number, not a times specification */
 396                 show_workspace(conn, times);
 397                 return;
 398         }
 399
 400         /* Now perform action to <where> */
 401         while (*rest != '\0') {
 402                 if (*rest == 'h')
 403                         direction = D_LEFT;
 404                 else if (*rest == 'j')
 405                         direction = D_DOWN;
 406                 else if (*rest == 'k')
 407                         direction = D_UP;
 408                 else if (*rest == 'l')
 409                         direction = D_RIGHT;
 410                 else {
 411                         printf("unknown direction: %c\n", *rest);
 412                         return;
 413                 }
 414
 415                 if (action == ACTION_FOCUS)
 416                         focus_window(conn, direction);
 417                 else if (action == ACTION_MOVE)
 418                         move_current_window(conn, direction);
 419                 else if (action == ACTION_SNAP)
 420                         snap_current_container(conn, direction);
 421
 422                 rest++;
 423         }
 424
 425         printf("--- done ---\n");
 426 }