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 *candidate = NULL;
  33         if (direction == D_UP)
  34                 candidate = CIRCLEQ_PREV(container->currently_focused, clients);
  35         else if (direction == D_DOWN)
  36                 candidate = 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 (candidate == CIRCLEQ_END(&(container->clients)))
  41                 return false;
  42
  43         /* Set focus if we could successfully move */
  44         set_focus(connection, candidate);
  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
  52         int new_row = current_row,
  53             new_col = current_col;
  54
  55         /* TODO: for horizontal default layout, this has to be expanded to LEFT/RIGHT */
  56         if (direction == D_UP || direction == D_DOWN) {
  57                 /* Let’s see if we can perform up/down focus in the current container */
  58                 Container *container = CUR_CELL;
  59
  60                 /* There always is a container. If not, current_col or current_row is wrong */
  61                 assert(container != NULL);
  62
  63                 if (focus_window_in_container(connection, container, direction))
  64                         return;
  65
  66                 if (direction == D_DOWN && cell_exists(current_col, current_row+1))
  67                         new_row++;
  68                 else if (direction == D_UP && cell_exists(current_col, current_row-1))
  69                         new_row--;
  70         } else if (direction == D_LEFT || direction == D_RIGHT) {
  71                 if (direction == D_RIGHT && cell_exists(current_col+1, current_row))
  72                         new_col++;
  73                 else if (direction == D_LEFT && cell_exists(current_col-1, current_row))
  74                         new_col--;
  75                 else {
  76                         printf("nah, not possible\n");
  77                         return;
  78                 }
  79         } else {
  80                 printf("direction unhandled\n");
  81                 return;
  82         }
  83
  84         if (c_ws->table[new_col][new_row]->currently_focused != NULL)
  85                 set_focus(connection, c_ws->table[new_col][new_row]->currently_focused);
  86 }
  87
  88 /*
  89  * Tries to move the window inside its current container.
  90  *
  91  * Returns true if the window could be moved, false otherwise.
  92  *
  93  */
  94 static bool move_current_window_in_container(xcb_connection_t *connection, Client *client,
  95                 direction_t direction) {
  96         assert(client->container != NULL);
  97
  98         Client *other = (direction == D_UP ? CIRCLEQ_PREV(client, clients) :
  99                                              CIRCLEQ_NEXT(client, clients));
 100
 101         if (other == CIRCLEQ_END(&(client->container->clients)))
 102                 return false;
 103
 104         printf("i can do that\n");
 105         /* We can move the client inside its current container */
 106         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 107         if (direction == D_UP)
 108                 CIRCLEQ_INSERT_BEFORE(&(client->container->clients), other, client, clients);
 109         else CIRCLEQ_INSERT_AFTER(&(client->container->clients), other, client, clients);
 110         render_layout(connection);
 111         return true;
 112 }
 113
 114 /*
 115  * Moves the current window to the given direction, creating a column/row if
 116  * necessary
 117  *
 118  */
 119 static void move_current_window(xcb_connection_t *connection, direction_t direction) {
 120         printf("moving window to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 121                                         (direction == D_LEFT ? "left" : "right"))));
 122         /* Get current window */
 123         Container *container = CUR_CELL,
 124                   *new = NULL;
 125
 126         /* There has to be a container, see focus_window() */
 127         assert(container != NULL);
 128
 129         /* If there is no window or the dock window is focused, we’re done */
 130         if (container->currently_focused == NULL ||
 131             container->currently_focused->dock)
 132                 return;
 133
 134         /* As soon as the client is moved away, the next client in the old
 135          * container needs to get focus, if any. Therefore, we save it here. */
 136         Client *current_client = container->currently_focused;
 137         Client *to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 138         if (to_focus == NULL)
 139                 to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 140
 141         switch (direction) {
 142                 case D_LEFT:
 143                         if (current_col == 0)
 144                                 return;
 145
 146                         new = CUR_TABLE[--current_col][current_row];
 147                         break;
 148                 case D_RIGHT:
 149                         if (current_col == (c_ws->cols-1))
 150                                 expand_table_cols(c_ws);
 151
 152                         new = CUR_TABLE[++current_col][current_row];
 153                         break;
 154                 case D_UP:
 155                         /* TODO: if we’re at the up-most position, move the rest of the table down */
 156                         if (move_current_window_in_container(connection, current_client, D_UP) ||
 157                                 current_row == 0)
 158                                 return;
 159
 160                         new = CUR_TABLE[current_col][--current_row];
 161                         break;
 162                 case D_DOWN:
 163                         if (move_current_window_in_container(connection, current_client, D_DOWN))
 164                                 return;
 165
 166                         if (current_row == (c_ws->rows-1))
 167                                 expand_table_rows(c_ws);
 168
 169                         new = CUR_TABLE[current_col][++current_row];
 170                         break;
 171         }
 172
 173         /* Remove it from the old container and put it into the new one */
 174         CIRCLEQ_REMOVE(&(container->clients), current_client, clients);
 175         CIRCLEQ_INSERT_TAIL(&(new->clients), current_client, clients);
 176
 177         /* Update data structures */
 178         current_client->container = new;
 179         container->currently_focused = to_focus;
 180         new->currently_focused = current_client;
 181
 182         /* delete all empty columns/rows */
 183         cleanup_table(connection, container->workspace);
 184         render_layout(connection);
 185
 186         set_focus(connection, current_client);
 187 }
 188
 189 /*
 190  * "Snaps" the current container (not possible for windows, because it works at table base)
 191  * to the given direction, that is, adjusts cellspan/rowspan
 192  *
 193  */
 194 static void snap_current_container(xcb_connection_t *connection, direction_t direction) {
 195         printf("snapping container to direction %d\n", direction);
 196
 197         Container *container = CUR_CELL;
 198
 199         assert(container != NULL);
 200
 201         switch (direction) {
 202                 case D_LEFT:
 203                         /* Snap to the left is actually a move to the left and then a snap right */
 204                         move_current_window(connection, D_LEFT);
 205                         snap_current_container(connection, D_RIGHT);
 206                         return;
 207                 case D_RIGHT:
 208                         /* Check if the cell is used */
 209                         if (!cell_exists(container->col + 1, container->row) ||
 210                                 CUR_TABLE[container->col+1][container->row]->currently_focused != NULL) {
 211                                 printf("cannot snap to right - the cell is already used\n");
 212                                 return;
 213                         }
 214
 215                         /* Check if there are other cells with rowspan, which are in our way.
 216                          * If so, reduce their rowspan. */
 217                         for (int i = container->row-1; i >= 0; i--) {
 218                                 printf("we got cell %d, %d with rowspan %d\n",
 219                                                 container->col+1, i, CUR_TABLE[container->col+1][i]->rowspan);
 220                                 while ((CUR_TABLE[container->col+1][i]->rowspan-1) >= (container->row - i))
 221                                         CUR_TABLE[container->col+1][i]->rowspan--;
 222                                 printf("new rowspan = %d\n", CUR_TABLE[container->col+1][i]->rowspan);
 223                         }
 224
 225                         container->colspan++;
 226                         break;
 227                 case D_UP:
 228                         move_current_window(connection, D_UP);
 229                         snap_current_container(connection, D_DOWN);
 230                         return;
 231                 case D_DOWN:
 232                         printf("snapping down\n");
 233                         if (!cell_exists(container->col, container->row+1) ||
 234                                 CUR_TABLE[container->col][container->row+1]->currently_focused != NULL) {
 235                                 printf("cannot snap down - the cell is already used\n");
 236                                 return;
 237                         }
 238
 239                         for (int i = container->col-1; i >= 0; i--) {
 240                                 printf("we got cell %d, %d with colspan %d\n",
 241                                                 i, container->row+1, CUR_TABLE[i][container->row+1]->colspan);
 242                                 while ((CUR_TABLE[i][container->row+1]->colspan-1) >= (container->col - i))
 243                                         CUR_TABLE[i][container->row+1]->colspan--;
 244                                 printf("new colspan = %d\n", CUR_TABLE[i][container->row+1]->colspan);
 245
 246                         }
 247
 248                         container->rowspan++;
 249                         break;
 250         }
 251
 252         render_layout(connection);
 253 }
 254
 255 static void show_workspace(xcb_connection_t *conn, int workspace) {
 256         Client *client;
 257         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 258         /* t_ws (to workspace) is just a convenience pointer to the workspace we’re switching to */
 259         Workspace *t_ws = &(workspaces[workspace-1]);
 260
 261         printf("show_workspace(%d)\n", workspace);
 262
 263         /* Store current_row/current_col */
 264         c_ws->current_row = current_row;
 265         c_ws->current_col = current_col;
 266
 267         /* Check if the workspace has not been used yet */
 268         if (t_ws->screen == NULL) {
 269                 printf("initializing new workspace, setting num to %d\n", workspace);
 270                 t_ws->screen = c_ws->screen;
 271                 /* Copy the dimensions from the virtual screen */
 272                 memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
 273         }
 274
 275         if (c_ws->screen != t_ws->screen) {
 276                 /* We need to switch to the other screen first */
 277                 printf("Just moving over to other screen.\n");
 278                 c_ws = &(workspaces[t_ws->screen->current_workspace]);
 279                 current_col = c_ws->current_col;
 280                 current_row = c_ws->current_row;
 281                 if (CUR_CELL->currently_focused != NULL)
 282                         warp_pointer_into(conn, CUR_CELL->currently_focused);
 283                 else {
 284                         Rect *dims = &(c_ws->screen->rect);
 285                         xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0,
 286                                          dims->x + (dims->width / 2), dims->y + (dims->height / 2));
 287                 }
 288         }
 289
 290         /* Check if we need to change something or if we’re already there */
 291         if (c_ws->screen->current_workspace == (workspace-1))
 292                 return;
 293
 294         t_ws->screen->current_workspace = workspace-1;
 295
 296         /* TODO: does grabbing the server actually bring us any (speed)advantages? */
 297         //xcb_grab_server(conn);
 298
 299         /* Unmap all clients of the current workspace */
 300         for (int cols = 0; cols < c_ws->cols; cols++)
 301                 for (int rows = 0; rows < c_ws->rows; rows++)
 302                         CIRCLEQ_FOREACH(client, &(c_ws->table[cols][rows]->clients), clients)
 303                                 xcb_unmap_window(conn, client->frame);
 304
 305         /* Unmap the stack windows on the current workspace, if any */
 306         struct Stack_Window *stack_win;
 307         SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 308                 if (stack_win->container->workspace == c_ws)
 309                         xcb_unmap_window(conn, stack_win->window);
 310
 311         c_ws = &workspaces[workspace-1];
 312         current_row = c_ws->current_row;
 313         current_col = c_ws->current_col;
 314         printf("new current row = %d, current col = %d\n", current_row, current_col);
 315
 316         /* Map all clients on the new workspace */
 317         for (int cols = 0; cols < c_ws->cols; cols++)
 318                 for (int rows = 0; rows < c_ws->rows; rows++)
 319                         CIRCLEQ_FOREACH(client, &(c_ws->table[cols][rows]->clients), clients)
 320                                 xcb_map_window(conn, client->frame);
 321
 322         /* Map all stack windows, if any */
 323         SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 324                 if (stack_win->container->workspace == c_ws)
 325                         xcb_map_window(conn, stack_win->window);
 326
 327         /* Restore focus on the new workspace */
 328         if (CUR_CELL->currently_focused != NULL)
 329                 set_focus(conn, CUR_CELL->currently_focused);
 330         else xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
 331
 332         //xcb_ungrab_server(conn);
 333
 334         render_layout(conn);
 335 }
 336
 337 /*
 338  * Parses a command, see file CMDMODE for more information
 339  *
 340  */
 341 void parse_command(xcb_connection_t *conn, const char *command) {
 342         printf("--- parsing command \"%s\" ---\n", command);
 343         /* Hmm, just to be sure */
 344         if (command[0] == '\0')
 345                 return;
 346
 347         /* Is it an <exec>? */
 348         if (strncmp(command, "exec ", strlen("exec ")) == 0) {
 349                 printf("starting \"%s\"\n", command + strlen("exec "));
 350                 start_application(command+strlen("exec "));
 351                 return;
 352         }
 353
 354         /* Is it <restart>? */
 355         if (strncmp(command, "restart", strlen("restart")) == 0) {
 356                 printf("restarting \"%s\"...\n", application_path);
 357                 execl(application_path, application_path, NULL);
 358                 /* not reached */
 359         }
 360
 361         /* Is it 'f' for fullscreen? */
 362         if (command[0] == 'f') {
 363                 if (CUR_CELL->currently_focused == NULL)
 364                         return;
 365                 toggle_fullscreen(conn, CUR_CELL->currently_focused);
 366                 return;
 367         }
 368
 369         /* Is it just 's' for stacking or 'd' for default? */
 370         if ((command[0] == 's' || command[0] == 'd') && (command[1] == '\0')) {
 371                 printf("Switching mode for current container\n");
 372                 switch_layout_mode(conn, CUR_CELL, (command[0] == 's' ? MODE_STACK : MODE_DEFAULT));
 373                 return;
 374         }
 375
 376         /* Is it a <with>? */
 377         if (command[0] == 'w') {
 378                 /* TODO: implement */
 379                 printf("not yet implemented.\n");
 380                 return;
 381         }
 382
 383         /* It's a normal <cmd> */
 384         int times;
 385         char *rest = NULL;
 386         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
 387         direction_t direction;
 388         times = strtol(command, &rest, 10);
 389         if (rest == NULL) {
 390                 printf("Invalid command (\"%s\")\n", command);
 391                 return;
 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         if (*rest == 'm' || *rest == 's') {
 401                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
 402                 rest++;
 403         }
 404
 405         /* Now perform action to <where> */
 406         while (*rest != '\0') {
 407                 if (*rest == 'h')
 408                         direction = D_LEFT;
 409                 else if (*rest == 'j')
 410                         direction = D_DOWN;
 411                 else if (*rest == 'k')
 412                         direction = D_UP;
 413                 else if (*rest == 'l')
 414                         direction = D_RIGHT;
 415                 else {
 416                         printf("unknown direction: %c\n", *rest);
 417                         return;
 418                 }
 419
 420                 if (action == ACTION_FOCUS)
 421                         focus_window(conn, direction);
 422                 else if (action == ACTION_MOVE)
 423                         move_current_window(conn, direction);
 424                 else if (action == ACTION_SNAP)
 425                         snap_current_container(conn, direction);
 426
 427                 rest++;
 428         }
 429
 430         printf("--- done ---\n");
 431 }